Patent Application
20220063054
This application claims the benefit under 35 U.S.C. § 119(a) of Chinese Patent Application No. 201910454858.8, filed on May. 29, 2019, Chinese Patent Application No. 201910571661.2, filed on Jun. 28, 2019, and Chinese Patent Application No. 201911388984.4, filed on Dec. 30, 2019, which are incorporated herein by reference in their entirety.
The present application relates to a power device, for example, a power tool.
Among some power tools that need to be installed with operation accessories, for example, an angle grinder is configured to cut a material or polish a workpiece. In a process of using the angle grinder, different types of grinding discs may need to be replaced due to frequent replacement and switching of operation conditions, or the grinding discs are worn out by the workpiece in an operation process of the angle grinder so that the grinding discs are consumed relatively greatly and thus need to be replaced more frequently.
In a traditional power tool, a shaft lock for locking a main shaft needs to be disposed in the power tool for installation and disassembly of the operation accessories. In addition, an auxiliary tool such as a wrench is needed to achieve installation and disassembly of the grinding discs. In this manner, a user needs to operate with two hands, which is troublesome and wastes energy; and the additional auxiliary tool such as the wrench is needed, which is troublesome and laborious. In the traditional power tool, a quick clamping structure exists so that the operation accessories can be installed without the aid of tools. However, to ensure the accuracy of clamping, the quick clamping structure is relatively complicated, which reduces the portability of the machine.
In one example of the disclosure, a power tool includes an output shaft and an installation apparatus. The output shaft is capable of rotating or swinging around a first axis. The installation apparatus is configured to install an operation accessory to the power tool and has an operation state and an installation state. In the case where the installation apparatus is in the operation state, the installation apparatus is capable of driving the operation accessory to move together with the output shaft. In the case where the installation apparatus is in the installation state, the installation apparatus allows the operation accessory to be installed to the installation apparatus and allows the operation accessory to be disassembled from the installation apparatus. The power tool further includes an inner shaft and a retention mechanism. The inner shaft is disposed in the output shaft and connected to the installation apparatus. The retention mechanism is capable of at least providing a retaining force that keeps the installation apparatus in a state in which the operation accessory is allowed to be disassembled and installed. The retention mechanism includes a movable piece connected to the inner shaft. The output shaft is formed with a guide rail that guides the movable piece to move. The movable piece is capable of moving along the guide rail to a first retention position and a second retention position. In the case where the installation apparatus is in the installation state and receives a rotation force applied by the operation accessory, the rotation force causes the movable piece to move from the second retention position to the first retention position so that the installation apparatus is switched from the installation state to the operation state.
In one example of the disclosure, the installation apparatus includes a first installation piece and a second installation piece fitting with each other to fix the operation accessory; in a process of the installation apparatus being switched from the operation state to the installation state, the first installation piece and the second installation piece rotate relative to each other in a circumferential direction around the first axis.
In one example of the disclosure, when the movable piece moves from the first retention position to the second retention position, the first installation piece rotates in a first rotation direction relative to the second installation piece, and a distance between the first installation piece and the second installation piece increases; and when the movable piece moves from the second retention position to the first retention position, the first installation piece rotates in a second rotation direction relative to the second installation piece, and the distance between the first installation piece and the second installation piece decreases.
In one example of the disclosure, the power tool includes an operation piece for a user to operate to drive the first installation piece to be disengaged from the second installation piece, where the operation piece is connected to a top end of the inner shaft and operable to drive the inner shaft to be displaced so that the movable piece slides from the first retention position to the second retention position.
In one example of the disclosure, the guide rail includes a first guide rail and a second guide rail that are smoothly connected; when the movable piece slides from the first retention position to the second retention position, the movable piece slides from the first guide rail to the second guide rail in the guide rail and provides the retaining force that keeps the installation apparatus in the installation state in the second guide rail.
In one example of the disclosure, a height of a sliding trajectory of the movable piece in a vertical direction of the guide rail is less than or equal to a height of the guide rail in the vertical direction.
In one example of the disclosure, when the movable piece moves from the first retention position to the second retention position, the movable piece rotates circumferentially relative to an axis of the inner shaft by 1° to 45°.
In one example of the disclosure, a power tool includes an output shaft, a motor, and a casing. The output shaft is capable of rotating or swinging around a first axis. The motor is configured to drive the output shaft. The casing is configured to support the motor. The power tool further includes an installation apparatus configured to install an operation accessory to the power tool and connected to the output shaft. The installation apparatus includes a first installation piece formed with a first clamping portion and a second installation piece formed with a second clamping portion capable of fitting with the first clamping portion to clamp the operation accessory. The installation apparatus receives a rotation force applied by the operation accessory so that the first installation piece moves to a first position and a second position relative to the second installation piece. In the case where the first installation piece moves to the first position, the first clamping portion is disengaged from the second clamping portion in a direction of the first axis, and the installation apparatus allows the operation accessory to be installed to the installation apparatus and allows the operation accessory to be disassembled from the installation apparatus. In the case where the first installation piece moves to the second position, the first clamping portion at least partially overlaps with the second clamping portion in the direction of the first axis, and the installation apparatus is capable of driving the operation accessory to move together with the output shaft.
In one example of the disclosure, in the case where the first installation piece is at the second position, in a direction parallel to the first axis, a distance between the first clamping portion and the second clamping portion is greater than 0 mm and less than or equal to 3 mm.
In one example of the disclosure, the first clamping portion has a first clamping surface for being in contact with the operation accessory, and the second clamping portion has a second clamping surface for being in contact with the operation accessory; in the case where the first installation piece is at the second position, the first clamping portion and the second clamping portion closest to the first clamping portion are defined as a clamping assembly; and in the case where the first installation piece is at the first position, a minimum dimension between the first clamping surface and the second clamping surface in the clamping assembly in a circumferential direction around the first axis is greater than or equal to 6 mm.
In one example of the disclosure, the first installation piece further includes a supporting surface connected to the first clamping surface, the supporting surface is perpendicular to the first axis, the first clamping surface drives the operation accessory to rotate, and the supporting surface axially supports the operation accessory.
In one example of the disclosure, the first clamping portion has an L-shaped structure.
In one example of the disclosure, in a clamping plane parallel to the first axis and intersecting with the first clamping surface and the second clamping surface, the first clamping surface has a first line of intersection that intersects with the clamping plane, and the second clamping surface has a second line of intersection that intersects with the clamping plane; where a straight line where the first line of intersection is located obliquely intersects with a straight line where the second line of intersection is located.
In one example of the disclosure, the installation apparatus further includes an inner shaft disposed coaxially with the output shaft, the first installation piece is connected to the inner shaft, and the second installation piece is connected to the output shaft.
In one example of the disclosure, a power tool includes an output shaft and an installation apparatus. The output shaft is configured to output power. The installation apparatus is configured to install an operation accessory to the power tool. The installation apparatus has an operation state and an installation state. In the case where the installation apparatus is in the operation state, the installation apparatus is capable of driving the operation accessory to move together with the output shaft. In the case where the installation apparatus is in the installation state, the installation apparatus allows the operation accessory to be installed to the installation apparatus and allows the operation accessory to be disassembled from the installation apparatus. The power tool further includes an energy storage element storing a driving force for driving the installation apparatus to have a tendency to move toward the operation state. In the case where the installation apparatus is in the installation state and receives a rotation force applied by the operation accessory, the energy storage element exerts the driving force to drive the installation apparatus to move to the operation state.
In one example of the disclosure, the installation apparatus further includes an inner shaft indirectly connected to the output shaft, and the inner shaft rotates relative to the output shaft to trigger the energy storage element to exert the driving force to drive the installation apparatus to move to the operation state.
In one example of the disclosure, the power tool includes a retention mechanism including a movable piece connected to the inner shaft and a guide rail formed on the output shaft, and the movable piece is placed in the guide rail and capable of sliding in the guide rail so that the inner shaft and the output shaft are indirectly connected and capable of rotating relative to each other.
In one example of the disclosure, the output shaft is capable of rotating or swinging around a first axis; the output shaft is formed with a receiving cavity around the inner shaft, and the movable piece extends in a direction perpendicular to the first axis and is inserted into the guide rail in the direction perpendicular to the first axis.
In one example of the disclosure, the energy storage element is a spring disposed in the receiving cavity, and the spring is sleeved on the inner shaft and biases against the inner shaft to produce the driving force.
In one example of the disclosure, a power tool includes an output shaft and an installation apparatus. The output shaft is capable of rotating or swinging around a first axis. The installation apparatus is configured to install an operation accessory to the power tool and has an operation state and an installation state. In the case where the installation apparatus is in the operation state, the installation apparatus is capable of driving the operation accessory to move together with the output shaft. In the case where the installation apparatus is in the installation state, the installation apparatus allows the operation accessory to be installed to the installation apparatus and allows the operation accessory to be disassembled from the installation apparatus. The power tool further includes a retention mechanism capable of at least providing a retaining force that keeps the installation apparatus in the installation state. In the case where the installation apparatus is in the installation state and receives a rotation force applied by the operation accessory, the rotation force triggers the retention mechanism to release a retention effect on the installation apparatus, and the installation apparatus is switched from the installation state to the operation state.
In one example of the disclosure, the output shaft is capable of rotating or swinging around the first axis; the power tool further includes an inner shaft rotatable relative to the output shaft, where the inner shaft is connected to the installation apparatus, and the installation apparatus transmits the received rotation force to the inner shaft so that the inner shaft rotates relative to the output shaft to trigger the retention mechanism to release the retention effect on the installation apparatus.
In one example of the disclosure, the power tool is an angle grinder, and in the case where the installation apparatus is in the operation state, the output shaft is capable of driving the operation accessory to rotate around the first axis in a first rotation direction; the power tool further includes a limiting mechanism that prevents the output shaft from rotating around the first axis in a second rotation direction opposite to the first rotation direction.
In one example of the disclosure, the limiting mechanism includes a one-way bearing connected to the output shaft.
In one example of the disclosure, the power tool further includes a limiting mechanism capable of being switched between a state in which the output shaft is allowed to rotate and a state in which the output shaft is prevented from rotating.
In one example of the disclosure, the power tool further includes a limiting mechanism, where the limiting mechanism is connected to the inner shaft, meshes with the output shaft to allow the output shaft to rotate only in a direction opposite to a rotation direction of the inner shaft in the installation state, and is disengaged from the output shaft in the operation state.
In one example of the disclosure, the operation accessory includes a central hole configured to fit with the installation apparatus to achieve installation, where a hole wall of the central hole is formed with a groove recessed in a direction farther from the first axis; the installation apparatus includes a first installation piece formed with a first clamping portion and a second installation piece formed with a second clamping portion capable of fitting with the first clamping portion to clamp the operation accessory; the first installation piece is capable of moving to a first position and a second position relative to the second installation piece; in the case where the first installation piece moves to the first position, the first clamping portion is disengaged from the second clamping portion in a direction of the first axis; and in the case where the first installation piece moves to the second position, both the first clamping portion and the second clamping portion are inserted into the groove.
In one example of the disclosure, in the case where the first installation piece is switched from the second position to the first position, a distance between the first clamping portion and the second clamping portion that are inserted into the same groove in a circumferential direction around the first axis increases.
In one example of the disclosure, the first clamping portion has a first clamping surface in contact with a groove wall of the groove, and the second clamping portion has a second clamping surface in contact with the groove wall of the groove; the first clamping portion and the second clamping portion that are inserted into the same groove are defined as a clamping assembly; in the case where the first clamping portion is at the first position, a minimum dimension between the first clamping surface and the second clamping surface in a circumferential direction around the first axis is greater than a minimum dimension of the groove in the circumferential direction around the first axis.
In one example of the disclosure, the first installation piece further includes a supporting surface connected to the first clamping surface, the supporting surface is perpendicular to the first axis, the first clamping surface drives the operation accessory to rotate, and the supporting surface axially supports the operation accessory.
In one example of the disclosure, the second clamping surface is an inclined surface, and a plane where the second clamping surface is located obliquely intersects with the first axis.
In one example of the disclosure, in the case where the first installation piece is at the first position, in a direction parallel to the first axis, a distance between the first clamping portion and the second clamping portion is less than a thickness of the operation accessory.
In one example of the disclosure, the power tool is a multifunctional power tool and includes a motor and a transmission assembly. The transmission assembly drives the output shaft to swing and includes a transmission bearing and a shift fork. The transmission bearing is driven by the motor. The shift fork is connected to the output shaft and driven by the transmission bearing to swing back and forth to drive the output shaft to swing. The installation apparatus includes a first installation piece and a second installation piece. The operation accessory is installed between the first installation piece and the second installation piece. The first installation piece is formed with a first clamping portion, and the second installation piece is formed with a second clamping portion capable of fitting with the first clamping portion to clamp the operation accessory. The first installation piece is capable of moving to a first position and a second position relative to the second installation piece. In the case where the first installation piece moves to the first position, the first clamping portion is disengaged from the second clamping portion in a direction of the first axis. In the case where the first installation piece is operated to rotate around the first axis to the second position, the first clamping portion supports the operation accessory in an axial direction of the first axis, and the second clamping portion fixes the operation accessory in a radial direction of the first axis so that the operation accessory is capable of being driven to rotate by the second clamping portion.
In one example of the disclosure, the operation accessory includes a first installation hole and a second installation hole configured to fit with the installation apparatus to achieve installation, where the second installation hole surrounds the first installation hole.
In one example of the disclosure, the first installation hole forms an opening on the operation accessory.
In one example of the disclosure, a power tool includes a motor, an output shaft, and an installation apparatus. The output shaft is driven by the motor to rotate around a first axis in a first rotation direction. The installation apparatus is configured to install an operation accessory to the power tool and has an operation state and an installation state. In the case where the installation apparatus is in the operation state, the installation apparatus is capable of driving the operation accessory to move together with the output shaft. In the case where the installation apparatus is in the installation state, the installation apparatus allows the operation accessory to be installed to the installation apparatus and allows the operation accessory to be disassembled from the installation apparatus. The power tool further includes a retention mechanism, an inner shaft, and a limiting mechanism. The retention mechanism is capable of at least providing a retaining force that keeps the installation apparatus in the installation state. The inner shaft is connected to the installation apparatus. The limiting mechanism is connected to the inner shaft. In the case where the installation apparatus is in the installation state, the limiting mechanism is configured to prevent the inner shaft and the output shaft from rotating synchronously; and in the case where the installation apparatus receives a rotation force applied by the operation accessory, the rotation force triggers the retention mechanism to release a retention effect on the installation apparatus, and the installation apparatus is switched from the installation state to the operation state.
In one example of the disclosure, the power tool includes an operation piece connected to the inner shaft, where the operation piece is configured to drive the inner shaft to be displaced so that the installation apparatus is switched from the operation state to the installation state.
In one example of the disclosure, a transmission mechanism is connected to the motor and the output shaft and includes a first bevel gear and a second bevel gear that mesh with each other, and the limiting mechanism includes a third bevel gear; in the installation state, the third bevel gear meshes with the first bevel gear; and in the operation state, the third bevel gear is disengaged from the first bevel gear.
In one example of the disclosure, the limiting mechanism includes a limiting piece and a limiting groove disposed on the output shaft, the limiting piece is connected to the operation piece, and the limiting piece is placed in the limiting groove in the installation state.
In one example of the disclosure, the limiting mechanism includes a one-way bearing connected to the output shaft.
In one example of the disclosure, the limiting mechanism is capable of being switched between a state in which the output shaft is allowed to rotate and a state in which the output shaft is prevented from rotating.
1 in an installation state;
As shown in
The power tool 100 further includes a retention mechanism 160 which has a retention state in which the retention mechanism 160 can provide a retaining force that keeps the installation apparatus 110 in the installation state. As shown in
In this example, the power tool 100 is the angle grinder, for example. The power tool may also be other power tools that can output power, such as a swing tool, a polisher, and an electric circular saw.
The power tool 100 further includes an inner shaft 130 that can rotate relative to the output shaft 111. The inner shaft 130 is connected to the installation apparatus 110. The installation apparatus 110 transmits the received rotation force to the inner shaft 130 so that the inner shaft 130 rotates relative to the output shaft 111 to trigger the retention mechanism 160 to release a retention effect on the installation apparatus 110. The inner shaft 130 is indirectly connected to and supports the operation accessory 200. In an example, the output shaft 111 is coaxially connected to the inner shaft 130. The output shaft 111 is formed with a receiving cavity 111′ around the first axis 101, and the inner shaft 130 passes through the receiving cavity 111′ along the first axis 101. Alternatively, the inner shaft 130 is completely disposed in the receiving cavity 111′; in this case, the output shaft 111 may also be regarded as an outer shaft around the inner shaft 130.
Referring to
As shown in
As shown in
The installation apparatus 110 is configured to keep the operation accessory 200 on the power tool 100 so that the first axis 101 substantially coincides with an axis of the output shaft 111.
The installation apparatus 110 is connected to the inner shaft 130 and rotates with the inner shaft 130 relative to the output shaft 111 to be switched between the installation state and the operation state and to unlock and lock the operation accessory 200 to the installation apparatus 110. A drive apparatus or the energy storage element 112 is triggered to exert the driving force through rotation of the installation apparatus 110, so as to drive a relative relationship between the installation apparatus 110 and a rotation apparatus to change from the installation state to the operation state.
The casing 150 includes a head casing 151 and a holding casing 152. The head casing 151 is connected to the holding casing 152, which are perpendicular or approximately perpendicular to each other. The head casing 151 is configured to package a head of the power tool 100. The installation apparatus 110 is connected to the head casing 151 and disposed partially inside the head casing 151. The output shaft 111 and the energy storage element 112 are at least partially exposed out of the head casing 151. The holding casing 152 is formed with a holding portion for the user to hold. In an example, the motor 120 and the motor shaft 121 are disposed inside the holding casing 152. The motor shaft 121 is designed to be perpendicular or approximately perpendicular to the output shaft 111, and the transmission mechanism 140 is connected to the motor shaft 121 and the output shaft 111. When the motor shaft 121 rotates, the output shaft 111 is driven to rotate through the transmission mechanism 140 and then drives the inner shaft 130 to rotate through the retention mechanism 160. The output shaft 111 is connected to the second installation piece 1132, and the inner shaft 130 drives the first installation piece 1131 so that a whole formed by the output shaft 111 and the inner shaft 130 drives the installation apparatus 110 to rotate and then the installation apparatus 110 drives the operation accessory 200 to rotate circularly.
The power tool 100 further includes an energy supply apparatus installed on or supported by the casing 150 and a control unit that controls the operation of the power tool 100. In this example, the energy supply apparatus is a power line connected to the external mains. In other examples, the energy supply apparatus may also be a battery pack. The battery pack is detachably installed to the casing 150 and connected to the motor 120 to supply power. The control unit generally adopts a circuit board assembly and is connected to the energy supply apparatus and the motor 120 to control the operation of the power tool 100.
The transmission mechanism 140 includes a first bevel gear 141 and a second bevel gear 142. The first bevel gear 141 is installed to the motor shaft 121 and can rotate synchronously with the motor shaft 121, and the second bevel gear 142 is installed to the output shaft 111 and can drive the output shaft 111 to rotate synchronously. The first bevel gear 141 and the second bevel gear 142 mesh with each other so that when the motor shaft 121 rotates, the first bevel gear 141 drives the second bevel gear 142 to rotate, the second bevel gear 142 drives the output shaft 111 to rotate synchronously, and the output shaft 111 can drive the inner shaft 130 to rotate synchronously, so as to achieve the vertical transmission of the motor shaft 121 to the inner shaft 130.
In an example, the output shaft is implemented as a casing piece surrounding the inner shaft 130, and the output shaft and the inner shaft 130 are connected by a limiting mechanism 170, where the limiting mechanism 170 is specifically a one-way bearing. The one-way bearing allows the relative rotation of the output shaft and the inner shaft 130 only in one direction. Here, it is defined that the output shaft is limited by the one-way bearing to be non-rotatable in the second rotation direction 302 so that the inner shaft 130 can rotate relative to the output shaft when receiving a force in the second rotation direction 302; the output shaft is not limited in the first rotation direction 301 so that the output shaft and the inner shaft 130 can rotate synchronously in the first rotation direction 301.
In addition to a shaft, the output shaft may also be a connector or other structures. In other examples, the output shaft is connected to the movable piece 133, the corresponding inner shaft 130 is provided with the guide rail and connected to the transmission mechanism through the output shaft, and the output shaft and the inner shaft 130 fit with each other to unlock or lock the operation accessory 200 and drive the operation accessory 200 to rotate in the operation state.
As shown in
A direction from the installation apparatus 110 to the transmission mechanism 140 on the first axis 101 is defined as a third direction 303. An average diameter of the second shaft portion 132 is less than an average diameter of the first shaft portion 131, and a sectional area of the second shaft portion 132 on a plane perpendicular to the first axis 101 is less than a sectional area of the first shaft portion 131 on this plane so that the energy storage element 112 can be placed on a periphery of the second shaft portion 132. In an example, the energy storage element 112 is an elastic piece such as a spring, and the spring is sleeved on the second shaft portion 132 of the inner shaft 130. In an example, the energy storage element 112 may also be configured to be other elastic pieces or other energy elements that can store energy when compressed and can release the stored energy.
In another example, the energy storage element is implemented as a motor and connected to an inductive element. When the inner shaft 130 rotates relative to the output shaft 111, the inductive element sends a signal to the motor and the motor provides a driving force to drive the inner shaft 130 to move upward relative to the output shaft 111 so that the installation apparatus 110 is locked. The energy storage element 112 may also be implemented as another apparatus that can provide the driving force when the operation accessory applies the rotation force to the installation apparatus.
The guide rail 1111 is formed on the output shaft 111 and a substantially L-shaped hole formed on the output shaft 111. The movable piece 133 is connected to the inner shaft 130. A height of a sliding trajectory of the movable piece 133 sliding in the guide rail 1111 in a direction of the first axis 101 is less than or equal to a height of the guide rail 1111 in the direction of the first axis 101. That is, under normal circumstances, the movable piece 133 generally does not slide to a top end of the guide rail 1111 when sliding along the guide rail 1111.
The movable piece 133 is disposed on a side wall of the first shaft portion 131 and configured to fit with the output shaft 111. The movable piece 133 is specifically a pin connected to the inner shaft 130. The movable piece 133 and the inner shaft 130 move synchronously in the direction of the first axis 101. The movable piece 133 and the inner shaft 133 move synchronously in a circumferential direction around the first axis 101. The pin is installed to the inner shaft 133, extends in a direction perpendicular to the first axis 101, and is inserted into the guide rail 1111 in the direction perpendicular to the first axis 101 to slide along the guide rail 1111. The pin penetrates the inner shaft 130 so that the movable piece 133 protrudes from a side wall of the inner shaft 130. Correspondingly, the output shaft 111 is provided with two guide rails 1111 matching positions of movable pieces 133, and the two guide rails 1111 are arranged centrosymmetrically relative to a certain point on the first axis 101. The movable pieces 133 disposed on two side walls of the inner shaft 130 are clamped to the guide rails 1111 at two ends, respectively, and the movable pieces 133 rotate synchronously in the two guide rails 1111.
The first guide rail 1112 is configured to extend in the direction of the first axis 101, the second guide rail 1113 is configured to extend in a direction approximately perpendicular to the first axis 101, and the second guide rail 1113 and the first guide rail 1112 smoothly communicate with each other so that the movable piece 133 can smoothly slide from the second guide rail 1113 to the first guide rail 1112. In the installation state, the movable piece 133 is clamped in the second guide rail 1113, and in the operation state, the movable piece 133 is clamped in the first guide rail 1112. During the switching from the installation state to the operation state, the movable piece 133 slides from the second guide rail 1113 to the first guide rail 1112 and is limited by the first guide rail 1112. During the switching from the operation state to the installation state, the movable piece 133 slides from the first guide rail 1112 to the second guide rail 1113 and is limited by the second guide rail 1113. When moving into the first guide rail 1112, the movable piece 113 is at a first retention position, and when moving into the second guide rail 1113, the movable piece 133 is at a second retention position. When the movable piece 133 moves from the second retention position to the first retention position, a whole formed by the movable piece 133 and the inner shaft 130 rotates by a preset angle relative to the output shaft 111. When moving from the first retention position to the second retention position, the movable piece 133 slides in the guide rail 1111 from the first guide rail 1112 to the second guide rail 1113 and provides the retaining force that keeps the installation apparatus 110 in the installation state in the second guide rail 1113.
In the operation state, the inner shaft 130 and the output shaft 111 rotate synchronously in the first rotation direction 301. When the installation apparatus 110 is switched from the installation state to the operation state, the first installation piece 1131 rotates relative to the second installation piece 1132 in the second rotation direction 302 opposite to the first rotation direction 301, and the first installation piece 1131 moves in the third direction 303 so that an axial distance between the first installation piece 1131 and the second installation piece 1132 is reduced. When the installation apparatus 110 is switched from the operation state to the installation state, the first installation piece 1131 rotates relative to the second installation piece 1132 in the first rotation direction 301, and the first installation piece 1131 moves in a direction opposite to the third direction 303 so that an axial distance between the first installation piece 1131 and the second installation piece 1132 is increased.
In the operation state, the first installation piece 1131 rotates relative to the second installation piece 1132 by 1° to 45° in the first rotation direction 301, so as to trigger the installation apparatus 110 to be switched from the operation state to the installation state. In the installation state, the first installation piece 1131 rotates relative to the second installation piece 1132 by 1° to 45° in the second rotation direction 302, so as to trigger the installation apparatus 110 to be switched from the installation state to the operation state.
In this manner, the user can install the operation accessory 200 by simply rotating the operation accessory 200 by a reasonable angle.
In the operation state, the first installation piece 1131 rotates relative to the second installation piece 1132 by 1° to 30° in the first rotation direction 301, so as to trigger the installation apparatus 110 to be switched from the operation state to the installation state. In the installation state, the first installation piece 1131 rotates relative to the second installation piece 1132 by 1° to 30° in the second rotation direction 302, so as to trigger the installation apparatus 110 to be switched from the installation state to the operation state. In an example, in the installation state, the first installation piece 1131 rotates relative to the second installation piece 1132 by 2° to 15° in the second rotation direction 302, so as to trigger the installation apparatus 110 to be switched from the installation state to the operation state. In this manner, the user can install the operation accessory 200 by simply rotating the operation accessory 200 by a relatively small angle, which is convenient for the user to operate. In this case, when the movable piece 133 moves from the first retention position to the second retention position, the movable piece 133 rotates relative to the output shaft 111 by 1° to 30°, and the first installation piece 1131 is driven to be disengaged from the second installation piece 1132. When moving from the first retention position to the second retention position, the movable piece 133 rotates relative to the outer shaft by 2° to 15°.
As shown in
As shown in
The installation apparatus 110 receives the rotation force applied by the operation accessory 200 so that the first installation piece 1131 moves to the first position and the second position relative to the second installation piece 1132. In the case where the first installation piece 1131 moves to the first position, the first clamping portion 1133 is disengaged from the second clamping portion 1134 in the direction of the first axis 101, and the installation apparatus 110 allows the operation accessory to be installed to the installation apparatus 110 and allows the operation accessory to be disassembled from the installation apparatus 110. In the case where the first installation piece 1131 moves to the second position, the first clamping portion 1133 at least partially overlaps with the second clamping portion 1134 in the direction of the first axis, and the installation apparatus 110 is capable of driving the operation accessory to move together with the output shaft.
The first clamping portion 1133 has a first clamping surface 1135 in contact with the operation accessory 200, and the second clamping portion 1134 has a second clamping surface 1136 in contact with the operation accessory 200. When the installation apparatus 110 is in the operation state, the operation accessory 200 is connected to the installation apparatus 110. At this time, as shown in
In an example, the second clamping surface 1136 is configured to be an inclined surface, and a plane where the second clamping surface 1136 is located obliquely intersects with the first axis so that the second clamping surface 1136 still has a clamping effect on the operation accessory after the installation apparatus is worn.
When the first installation piece 1131 moves from the second position to the first position, a distance between the first clamping portion 1133 and the second clamping portion 1134 inserted into the same groove in the circumferential direction around the first axis is increased gradually. However, the distance between the first clamping portion 1133 and the second clamping portion 1134 inserted into the same groove in the circumferential direction is still greater than a distance between the second clamping portion 1134 in another groove and the first clamping portion 1133 in the circumferential direction. That is, it can also be understood that the first clamping portion 1133 and the second clamping portion 1134 closest to the first clamping portion 1133 are defined as the clamping assembly. When the first installation piece 1131 moves from the second position to the first position, a distance between the first clamping portion 1133 and the second clamping portion 1134 in the clamping assembly in the direction of the first axis 101 is increased gradually. However, to prevent the operation accessory 200 from being jammed when the operation accessory 200 is disassembled, in this example, when the first installation piece 1131 is at the first position, a minimum dimension L1 between the first clamping surface 1135 and the second clamping surface 1136 in the clamping assembly in the circumferential direction around the first axis 101 is made greater than a minimum dimension of the groove 211 in the circumferential direction around the first axis 101; and a distance L2 between the first clamping portion 1133 and the second clamping portion 1134 in the direction of the first axis 101 is made less than a thickness of the operation accessory 200 in the direction of the first axis 101. In an example, to prevent the operation accessory 200 from being jammed when the operation accessory 200 is disassembled, in this example, when the first installation piece 1131 is at the first position, the minimum dimension L1 between the first clamping surface 1135 and the second clamping surface 1136 in the clamping assembly in the circumferential direction around the first axis 101 is made greater than or equal to 6 mm; and the distance L2 between the first clamping portion 1133 and the second clamping portion 1134 in the direction of the first axis 101 is made greater than 0 mm and less than or equal to 3 mm.
The energy storage element 112 stores a driving force for driving the first installation piece 1131 to have a tendency to move to the second position. In the case where the installation apparatus 110 is in the installation state and receives the rotation force applied by the operation accessory 200, the energy storage element 112 exerts the driving force to drive the first installation piece 1131 to move to the second position. The energy storage element 112 provides the driving force to make the inner shaft 130 and the movable piece 133 move axially.
After driving the operation accessory 200 for a long time, the first installation piece 1131 is easily worn by the operation accessory 200, which reduces the stability of the installation apparatus 110 locking the operation accessory 200. To solve this problem, the present application further provides a solution for preventing the operation accessory from being fixed with low accuracy due to wear. The first clamping portion 1133 is further formed with a first supporting surface 1137 for supporting the operation accessory. The first clamping surface 1135 is parallel to the first axis 101, and the first supporting surface 1137 is perpendicular to the first axis 101. The first supporting surface 1137 and the first clamping surface 1135 are connected and rotate synchronously. The second installation piece 1132 has a lower surface 1138, and the second clamping portion 1134 is a protrusion extending downward from the lower surface 1138. A distance between the first supporting surface 1137 and the lower surface 1138 is greater than the thickness of the operation accessory 200 by a preset value L, and a dimension of the first clamping surface 1135 in the direction of the first axis 101 is less than the distance between the first supporting surface 1137 and the lower surface 1138. In this manner, when the operation accessory 200 is worn, the first clamping portion 1133 may be closer to the lower surface 1138 in the direction of the first axis to clamp the operation accessory. Correspondingly, a height of the first guide rail 1112 in the direction of the first axis 101 is greater than a height corresponding to a position where the movable piece 133 stays in the first guide rail 1112 in an initial unworn state by a distance at least greater than or equal to the preset value L. The first clamping surface 1135 is configured to be in contact with the operation accessory 200 and drive the operation accessory 200 to rotate, and the first supporting surface 1137 is configured to be in contact with the operation accessory 200 and support the operation accessory 200 to the installation apparatus 110.
Referring to
In an example, in the operation state, the first clamping surface 1135 is in contact with a groove wall of the groove 211, the second clamping surface 1136 is in contact with another groove wall of the groove 211, the first supporting surface 1137 supports a lower surface of the operation accessory 200, and the second clamping surface 1136 is an inclined surface. In this manner, the second clamping surface 1136 and the first supporting surface 1137 fit with each other so that the operation accessory 200 is clamped in the direction of the first axis 101; the second clamping surface 1136 and the first clamping surface 1135 fit with each other so that the operation accessory 200 is clamped in the circumferential direction around the first axis 101. In the operation state, the first installation piece 1131 partially penetrates the central hole 210, the first supporting surface 1137 supports the operation accessory 200, and a projection of the first supporting surface 1137 on the plane perpendicular to the first axis 101 is located outside a projection of the central hole 210 on this plane.
The first installation piece 1131 further includes a first alignment surface 1140 and a second alignment surface 1141 on two sides of the first clamping portion 1133. The first alignment surface 1140 is connected to the first supporting surface 1137, and the second alignment surface 1141 is disposed opposite to the first clamping surface 1135. When the operation accessory 200 is installed to the second installation piece 1132, the first alignment surface 1140 and the second alignment surface 1141 cause the central hole 210 of the operation accessory 200 to fit with the first clamping portion 1133, and the first alignment surface 1140 and the second alignment surface 1141 abut against or approach side walls of the central hole 210, respectively, so that the first clamping portion 1133 corresponds to the central hole 210 to guide the operation accessory 200 to move.
In an example, when the operation accessory 200 is installed to the power tool 100, generally, the central hole 210 of the operation accessory 200 is aligned with the first installation piece 1131 and the groove 211 is aligned with the first clamping portion 1133, and then the first alignment surface 1140 and the second alignment surface 1141 guide the operation accessory 200 so that the operation accessory 200 is sleeved on the second installation piece 1132 and thus the first supporting surface 1137 of the first installation piece passes through the central hole 210 along the first axis 101. At this time, the user rotates the operation accessory 200 in the second rotation direction 302 so that the operation accessory 200 rotates until the transmission portion 212 is in contact with the first clamping surface 1135 and the first supporting surface 1137 is staggered from the groove 211, and then the user continues rotating the operation accessory 200 in the second rotation direction 302 so that the operation accessory 200 is in contact with the first clamping surface 1135 through the transmission portion 212 to transmit the rotation force to the first clamping portion 1133. In this case, the output shaft 111 is prevented from rotating in the second rotation direction 302. Since the output shaft 111 is prevented by the one-way bearing from rotating in the second rotation direction 302, when the first clamping portion 1133 transmits the rotation force to the inner shaft 130 to drive the inner shaft to rotate around the first axis 101, the output shaft 111 does not rotate, and the inner shaft 130 drives the movable piece 133 to rotate in the guide rail 1111 to be disengaged from the second guide rail 1113. When the inner shaft 130 drives the movable piece 133 to rotate relative to the output shaft 111 to be disengaged from the second guide rail 1113, a friction force between the movable piece 133 and the output shaft 111 and a friction force generated by the spring need to be overcome. In this manner, when the movable piece 133 is disengaged from the second guide rail 1113, the second guide rail 1113 no longer limits the movable piece 133, and the retention mechanism 160 no longer provides the retaining force so that the inner shaft 130 no longer compresses the energy storage element 112, and the energy storage element 112 exerts the driving force. The driving force pushes the inner shaft 130 to move upward to drive the movable piece 133 to slide into the first guide rail 1112. When the inner shaft 130 is driven to move upward, the movable piece 133 is limited by the guide rail 1111 and driven to rotate in the second rotation direction 302 so that the first clamping portion 1133 rotates partially into the central hole 210 and is inserted into the groove 211, and the first supporting surface 1137 is staggered from the central hole 210. The first supporting surface 1137 supports the operation accessory 200 and drives the operation accessory 200 to move in the third direction 303 so that the second installation piece 1132 is inserted into the central hole 210 and the second clamping portion 1134 is inserted into the groove 211 of the central hole 210, and the first clamping surface 1135 is in contact with one side of the groove 211 and the second clamping surface 1136 is in contact with another side of the groove; thus, the installation apparatus 110 positions the operation accessory 200 in the circumferential direction. Moreover, since the second clamping surface 1136 is the inclined surface and the first supporting surface 1137 is in contact with the lower surface of the operation accessory 200, the installation apparatus 110 can position the operation accessory 200 in the direction of the first axis 101. The movable piece 133 slides between the first guide rail 1112 and the second guide rail 1113 so that the first installation piece 1131 moves axially and rotates circumferentially at the same time.
The second installation piece 1132 mainly prevents the operation accessory 200 and the first installation piece 1131 from being displaced due to inertia when the power tool 100 stops operating and enhances the installation stability of a locking assembly and the operation accessory 200. During the operation of the power tool 100, the first installation piece 1131 drives and supports the operation accessory 200 to operate.
The power tool 100 further includes an operation piece 180 for the user to operate to switch the power tool 100 from the operation state to the installation state. At this time, the first installation piece 1131 is disengaged from the second installation piece 1132. The operation piece 180 includes an operation portion operated by the user. The operation piece 180 is connected to the inner shaft 130. In an example, the operation piece 180 is disposed on an upper part of the head casing 151. The operation piece 180 may be configured to be a wrench and has a curved surface at a position of the operation piece 180 connected to the inner shaft 130 so that the wrench may be pulled in the direction opposite to the third direction 303 to push the inner shaft 130 to move in the direction opposite to the third direction 303 and compress the energy storage element 112. When the operation piece 180 drives the inner shaft 130 to move downward, the movable piece 133 can be driven together to slide into the second guide rail 1113. At this time, the inner shaft 130 and the movable piece 133 rotate together in the first rotation direction 301 so that a projection of the first clamping portion 1133 in the third direction 303 is located within a projection of the central hole 210 in the third direction 303, the operation accessory 200 is unlocked from the first installation piece 1131 and can be disengaged from the inner shaft 130, and thus the operation accessory 200 is unlocked from the installation apparatus 110.
In an example, the energy storage element 112 is unlocked through the rotation of the installation apparatus 110, provides a first force in the operation state, and provides a second force different from the first force in the installation state, so as to trigger a mutual switch between the installation state and the operation state of the installation apparatus 110 and the rotation apparatus.
The operation piece 180 is rotatably connected to the head casing 151. An axis around which the operation piece 180 rotates relative to the head casing 151 is perpendicular to the first axis 101 and also perpendicular to the axis around which the motor shaft 121 rotates. In this manner, the user can rotate the operation piece 180 with more convenience and less efforts.
Similarly, when the user needs to disassemble the operation accessory 200 installed to the power tool 100, the user rotates the operation piece 180. When the operation piece 180 rotates, the curved surface on the operation piece 180 triggers the inner shaft 130 to move downward. The inner shaft 130 drives the movable piece 133 and the first installation piece 1131 to move downward together. At the same time, the inner shaft 130 compresses the energy storage element 112 for the energy storage element 112 to store energy. When moving downward, the movable piece 133 is disengaged from the first guide rail 1112 and then continues to move from the first guide rail 1112 to the second guide rail 1113. At this time, the movable piece 133 rotates around the first axis 101 in the first rotation direction 301 by a certain angle, and the movable piece 133 rotating by a certain angle drives the inner shaft 130 and the first installation piece 1131 fixedly connected to the inner shaft 130 to rotate together by a certain angle in the first rotation direction 301. When the first installation piece 1131 is driven to move downward along the first axis 101, the second clamping portion 1134 is disengaged upward from the operation accessory 200. At this time, only the first clamping portion 1133 is inserted into the groove 211. When the first installation piece 1131 is driven to rotate in the first rotation direction 301, the first clamping surface 1135 applies an impact force to the side wall of the groove 211. The impact force triggers the operation accessory 200 to rotate together with the first installation piece 1131 in the first rotation direction 301 and further rotate by another angle relative to the first installation piece 1131 in the first rotation direction 301. The operation accessory 200 rotates relative to the first installation piece 1131 so that the first supporting surface 1137 no longer supports the operation accessory and moves to a position corresponding to the groove 211. At this time, a projection of the first installation piece 1131 in a plane of the first axis 101 is located within a projection of the central hole 210 in this plane. In this manner, under the action of gravity, the operation accessory 200 automatically falls and is disengaged from the power tool. That is, in a process of disassembling the operation accessory 200 installed to the power tool 100, the user may only need to rotate the operation piece 180 and then the operation accessory 200 can be automatically disengaged from the power tool 100, which is convenient for the user to operate.
In this example, the limiting mechanism 170 is implemented as the one-way bearing and further includes a buffer rubber. The one-way bearing is sleeved on the output shaft 111 and connected to a buffer rubber column supported by the head casing 151. The one-way bearing limits the output shaft 111 such that the output shaft 111 is non-rotatable in the second rotation direction 302 and rotatable in the first rotation direction 301 so that the output shaft 111 can rotate relative to the inner shaft 130 only in the installation state and during a switch between the installation state and the operation state. In the operation state, the output shaft 111 and the inner shaft 130 rotate synchronously. The buffer rubber is configured to decelerate the output shaft 111 to stop the output shaft 111 when the power tool 100 stops operating.
In this example, the limiting mechanism 170 is specifically the one-way bearing. In other examples, the limiting mechanism 170 may also be another mechanism that limits the output shaft 111 such that the output shaft 111 can rotate relative to the inner shaft 130 only during the mutual switch between the operation state and the installation state and the output shaft 111 rotates synchronously with the inner shaft 130 in the operation state.
In an example of the limiting mechanism, the limiting mechanism is connected to the output shaft 111, the output shaft 111 rotates in the first rotation direction 301 in the operation state, and the limiting mechanism limits the output shaft 111 such that the output shaft 111 can rotate relative to the inner shaft 130 only in the second rotation direction 302 in at least a non-operation state, where the second rotation direction 302 is opposite to the first rotation direction 301.
A state in which the power tool 100 drives the operation accessory 200 to rotate in the first rotation direction 301 is defined as the operation state, and a process state of the mutual switch between the installation state and the operation state is defined as the installation state. In the operation state, the limiting mechanism does not limit the rotation of the output shaft 111 so that the output shaft 111 and the inner shaft 130 rotate synchronously; in the installation state, the limiting mechanism limits the rotation of the output shaft 111 so that the inner shaft 130 can rotate relative to the output shaft 111 through the guide rail 1111. In this manner, the rotation of the installation apparatus 110 is controlled for switching between the operation state and the installation state of the installation apparatus 110.
In an example of the limiting mechanism, when the installation apparatus 110 is in the operation state, the output shaft 111 can drive the operation accessory 200 to rotate around the first axis 101 in the first rotation direction 301; the power tool 100 further includes the limiting mechanism that prevents the output shaft 111 from rotating around the first axis 101 in the second rotation direction 302 opposite to the first rotation direction 301.
In an example of the limiting mechanism, the power tool 100 further includes the limiting mechanism capable of being switched between a state in which the output shaft 111 is allowed to rotate and a state in which the output shaft 111 is prevented from rotating. The limiting mechanism may be a shaft lock that can transmit power in one direction, that is, the output shaft 111 is allowed to transmit power to the inner shaft 130, but the inner shaft 130 is not allowed to transmit power to the output shaft 111.
As shown in
In another example, the limiting mechanism is disposed in a holding portion, connected to a driver circuit that controls the motor, and connected to the output shaft 111. The limiting mechanism may be configured to control the motor to stop rotating and limit the rotation of the output shaft 111 in the installation state while controlling the motor to stop rotating.
In an example, the limiting mechanism may be configured to be other movable elements that lock and limit the rotation of the output shaft 111 in the installation state and do not limit the rotation of the output shaft 111 in the operation state.
As shown in
In the unlocking process, the operation piece is pulled in the direction opposite to the third direction 303 so that the inner shaft 130 is pushed downward in the third direction 303. At this time, the movable piece 133 moves relatively downward and enters the guide rail 1111 to limit the rotation of the output shaft 111. In an example, during locking, the inner shaft 130 is pushed upward, and the operation piece is pushed upward through the inner shaft 130 so that the movable piece 133 is disengaged from the guide rail 1111, and the movable piece 133 no longer limits the rotation of the output shaft 111. In an example, the operation piece may also be another structure that can drive the inner shaft to be displaced in an axial direction of the first axis, such as a knob provided with threads.
As shown in
In this example, the first clamping surface 1135 and the second clamping surface 1136 are configured to be inclined surfaces so that the first clamping portion 1133 is not necessarily closely attached to a side of the central hole 210, and the second clamping portion 1134 is not necessarily closely attached to a side of the central hole 210. In this manner, when a distance between the first clamping portion 1133 and the side of the central hole 210 is different, the operation accessory 200 is driven to operate by a position of the first clamping surface 1135 connected to the side of the central hole 210 at a different height so that the stability of the installation apparatus 110 locking the operation accessory 200 is improved and the effective service life of the installation apparatus 110 is extended. The first clamping surface 1135 is configured to be an inclined surface, which means that the first clamping surface 1135 is parallel to the first axis 101 but obliquely intersects with an axial direction along which the motor shaft 121 rotates. The second clamping surface 1136 is configured to be an inclined surface, which means that the second clamping surface 1136 obliquely intersects with the first axis 101. The second clamping surface 1136 is designed to be the inclined surface so that the operation accessory 200 can be driven not only when the distance between the first clamping portion 1133 and the side of the central hole 210 is fixed; when a distance between the first clamping portion 1133 and the side of the central hole 210 is different, the first clamping portion 1133 abuts against the side of the central hole 210 at a different height. In this manner, the stability of installing and driving the operation accessory 200 can be ensured.
When the output shaft is at the locking position, the first clamping surface 1135′ on the adapter interface abuts against the first side wall of the groove of the grinding disc, and the first supporting surface 1137′ abuts against a first surface of the grinding disc to axially position the grinding disc. The protrusion of the locking piece abuts against the bump of the adapter interface, and the second limiting surface 1136′ of the protrusion abuts against the second side wall of the grinding disc opposite to the first side wall. The first clamping surface 1135′ of the bump and the second limiting surface 1136′ of the protrusion together radially position the grinding disc.
Another example provides a power tool to which a grinding disc or an operation accessory is installed, the grinding disc has an installation hole, the installation hole includes a central hole and multiple grooves extending in a direction farther from the first axis and formed on a periphery of the central hole. The power tool includes an output shaft that is driven to move from an installation position toward a locking position. An adapter interface or a first installation piece is connected to the output shaft and used for installing the grinding disc, the adapter interface or the first installation piece has a first surface and an outer periphery of the first surface, and the outer periphery of the first surface of the adapter interface or the first installation piece is constructed to fit with an outer periphery of the installation hole of the grinding disc. Multiple bumps are formed on the first surface of the adapter interface, and the bump has a first supporting surface opposite to the first surface of the adapter interface and a first clamping surface adjacent to the first supporting surface. When the output shaft is at the installation position, the outer periphery of the adapter interface or the first installation piece fits with the outer periphery of the installation hole of the grinding disc; when the output shaft is at the locking position, the first supporting surface on the adapter interface or the first installation piece axially positions the grinding disc and the first clamping surface radially positions the grinding disc so that the grinding disc is locked.
The installation apparatus provided in the present application can be applied to various power tools that rotate to operate, such as an angle grinder and a sander. The angle grinder further includes a protective cover connected to the head casing and configured to surround the operation accessory to protect the user, and the operation accessory is implemented as the grinding disc, which is not described in detail herein.
In an example, as shown in
The operation accessory 200a may be a cutting circular saw blade or cutting straight saw blade provided with sawteeth, or a saw blade such as a sanding disc and a polishing disc with sanding surfaces. The operation accessory 200a has at least a first installation hole 211a and a second installation hole 212a that fit with the installation apparatus 110a so that the operation accessory 200a can be detachably installed.
Referring to
The multifunctional power tool 100a further includes an energy supply apparatus installed on or supported by the casing 150a and a control unit that controls the operation of the multifunctional power tool 100a. The control unit generally adopts a circuit board assembly and is connected to the motor 120a to control the operation of the multifunctional power tool 100a.
In an example, the motor 120a includes a motor shaft 121a for output, the motor shaft 121a extends along a second axis 102a, the transmission assembly 140a further includes a transmission shaft 143a and a supporting bearing 144a, and the transmission shaft 143a extends along the second axis 102a and is drivingly connected to the motor shaft 121a to be driven to rotate by the motor shaft 121a. An end of the transmission shaft 143a is supported by the supporting bearing 144a, and the transmission shaft 143a is connected to the transmission bearing 141a. The transmission shaft 143a has at least a shaft section that is partially non-centrosymmetric relative to the second axis 102a, the transmission bearing 141a is sleeved on the non-centrosymmetric section, and the transmission bearing 141a is eccentrically arranged relative to the second axis 102a and has an eccentricity. The shift fork 142a is connected to the transmission bearing 141a and driven by the transmission bearing 141a to swing around the first axis 101a, and the shift fork 142a clamps the output shaft 111a through its clamping portion, thereby driving the output shaft 111a to swing around the first axis 101a.
Referring to
The first installation piece 1131a is an apparatus for the user to operate to trigger the operation state of the installation apparatus, and the first installation piece is disposed at a lower end of the output shaft 111a. Here, the operation accessory 200a is also disposed at the lower end of the output shaft 111a. Therefore, an apparatus for the user to operate to trigger the installation apparatus to lock the operation accessory is an accessory disposed at a position where the operation accessory is installed, which is convenient for the user to operate to install the operation accessory 200a. The first installation piece 1131a further includes an operation portion 1137a for the user to operate the first installation piece 1131a to drive the first installation piece 1131a to rotate around the first axis 101a, thereby triggering the installation apparatus 110a to enter the operation state from the installation state so as to install and lock the operation accessory 200a.
The multifunctional power tool 100a further includes a retention mechanism 160a which has a retention state in which the retention mechanism 160 can provide a retaining force that keeps the installation apparatus 110a in the installation state. The retention mechanism 160a includes a guide rail 1111a and a movable piece 133 configured to slide in the guide rail 1111a. The multifunctional power tool 100a further includes an inner shaft 130a that can rotate relative to the output shaft 111a and is fixedly connected to the first installation piece 1131a. The first installation piece 1131a is operated to rotate around the first axis 101a to trigger the retention mechanism 160a to release a retention effect on the installation apparatus 110a. Referring to
Referring to
The first installation piece 1131a is configured to be a knob for the user to operate, the operation portion 1137a is a protrusion for the user to rotate, and the first installation piece 1131a is fixedly connected to the inner shaft 130a. The user rotates the first installation piece 1131a to drive the inner shaft 130a to rotate, and the movable piece 133a connected to the inner shaft 130a is driven to slide in the guide rail 1111a to move between a first guide rail 1112a and a second guide rail 1113a in the guide rail 1111a so that the inner shaft 130a moves in an axial direction of the first axis 101a. In this manner, the first installation piece 1131a fits with the second installation piece 1132a and thus the operation accessory 200a can be unlocked and locked.
The second clamping portion 1134a of the second installation piece 1132a fits with the second installation holes 212a in position and dimension so that the second clamping portion 1134a can be placed into the second installation holes 212a and pass through the operation accessory 200a through the second installation holes 212a in the axial direction of the first axis 101a, and thus in the operation state, the second clamping portion 1134a limits the displacement of the operation accessory 200a in a radial direction of the first axis 101a. The first clamping portion 1133a is formed on a bottom surface of the first installation piece 1131a facing the second installation piece 1132a. In this example, the second clamping portion 1134a is a plane. The first installation piece 1131a is acted by the energy storage apparatus in the operation state and fits with the second installation piece 1132a to clamp the operation accessory 200a in the axial direction of the first axis 101a, and the first clamping portion 1133a supports the operation accessory 200a in the radial direction. The first clamping portion 1133a fits with the second clamping portion 1134a so that in the operation state, the operation accessory 200a is fixedly installed to the installation apparatus 110a.
In an example, referring to
Referring to
Referring to
The first clamping portion 1133c surrounds centrosymmetrically the first installation piece 1131c around the first axis and is formed with an operation portion 1136c. The user controls rotation of the first installation piece 1131c by holding the operating portion 1136c, that is, the user controls the rotation of the first installation piece 1131c by holding multiple first clamping portions 1133c. In this manner, the installation apparatus is triggered to lock the operation accessory.
It is to be understood that the installation apparatus in this example may also be configured to install the operation accessory provided with the opening. Therefore, the installation apparatus can be adapted to install operation accessories of different interface types, which improves the compatibility of the installation apparatus with operation accessories.
In this example, the operation accessory 200d may further include a third installation hole 213c configured to be connected to the second clamping portion 1134c. In this case, the second clamping portion 1134c is inserted into the third installation hole 213c in the operation state, the second installation hole 212c is only used for the first clamping portion 1133c to pass through when the operation accessory is installed, and in the operation state, the first clamping portion 1133c and the third installation hole 213c are staggered in the axial direction of the first axis. In this manner, the first clamping portion 1133c supports the operation accessory, and the first clamping portion 1133c fits with the second clamping portion 1134c to lock the operation accessory 200d.
| Number | Date | Country | Kind |
|---|---|---|---|
| 201910454858.8 | May 2019 | CN | national |
| 201910571661.2 | Jun 2019 | CN | national |
| 201911388984.4 | Dec 2019 | CN | national |
| Number | Date | Country | |
|---|---|---|---|
| Parent | PCT/CN2020/092571 | May 2020 | US |
| Child | 17522681 | US |
