The present application relates to the technical field of power tools, for example, a power tool with multiple output units.
Typically, a handheld power tool has only one output head for mounting a working accessory. Therefore, when the power tool is used, the working accessory needs to be replaced in conjunction with different use conditions. When the working accessory is replaced, the original working accessory needs to be removed and then a working accessory to be used is mounted. It is cumbersome to remove and mount the working accessories, which affects a user's experience and work efficiency in a working process. Therefore, some power tools each of which has double working heads appear in the related art, where positions of the double working heads are shifted so that requirements of different working conditions can be met.
However, a power tool with double working heads in the related art has the following problems: firstly, since a working head and a structure for shifting the double working heads are added, the power tool with the double working heads typically has a complicated structure and a great weight, which is inconvenient for the user to operate, has redundant structures occupying a relatively large space of the whole machine, and is not conducive to the miniaturization of the whole machine; secondly, the arrangement of internal structures and the shape of the whole machine are improper, resulting in the deviation of the center of gravity of the whole machine, which causes the tool to stand unsteadily during use, leads to poor user experience, and reduces the work efficiency of the tool; and thirdly, a clutch mechanism is typically further provided so that it is convenient to break a transmission connection between a working head and a transmission mechanism when the working head is shifted, a locking switch in the related art for implementing a disconnection and a connection is typically disposed on a handle of a main body and far from the working head, and when a shift operation is performed, the user needs to press the locking switch with one hand for an unlocking purpose and rotate the working heads with the other hand to shift the working heads, which is not conducive to a shift by the user with a single hand and affects the operation experience of the user.
An example provides a power tool including a body, an output assembly, a power mechanism, a switch assembly, and a battery pack. The body includes a first handle. The output assembly is disposed at an end portion of the body. The power mechanism includes an electric motor and a transmission unit which drive the output assembly to move. The switch assembly is disposed on the body and controls the power mechanism. The battery pack supplies power to the power mechanism. The output assembly includes a first output unit and a second output unit, where the first output unit and the second output unit are spaced apart, the first output unit is used for connecting a first working accessory, the second output unit is used for connecting a second working accessory, and the output assembly is rotatable about a shift axis to shift the first output unit to a working position or a non-working position. The battery pack is disposed at a bottom of the body, the battery pack includes a standing surface through which the power tool is capable of standing, and when the power tool stands, an orthographic projection of a center of gravity of the power tool on the standing surface is in the standing surface.
An example provides a power tool including a body, an output assembly, a power mechanism, a switch assembly, and a battery pack. The body includes a first handle. The output assembly is disposed at an end portion of the first handle. The power mechanism includes an electric motor and a transmission unit which drive the output assembly to move. The switch assembly is disposed on the body and controls the power mechanism. The battery pack supplies power to the power mechanism. The output assembly includes at least two output units spaced apart and used for connecting working accessories. The power tool further includes a shift mechanism including mounting portions, where each of the at least two output units is supported by a respective one of the mounting portions, and the shift mechanism is rotatably disposed at the end portion of the first handle about a shift axis. The battery pack is disposed at a bottom of the body, the battery pack includes a standing surface through which the power tool is capable of standing, and when the power tool stands, an orthographic projection of a center of gravity of the power tool on the standing surface is in the standing surface.
An example provides a power tool including a body, an output assembly, a power mechanism, and a switch assembly. The body includes a first handle. The output assembly is disposed at an end portion of the first handle. The power mechanism includes an electric motor and a transmission unit which drive the output assembly to move. The switch assembly is disposed on the body and controls the power mechanism. The output assembly includes at least two output units spaced apart and used for connecting working accessories. The power tool further includes a shift mechanism and a clutch mechanism. The shift mechanism includes mounting portions, where each of the at least two output units is supported by a respective one of the mounting portions, and the shift mechanism is rotatably disposed at the end portion of the first handle about a shift axis. The clutch mechanism is movably connected to the shift mechanism, where the clutch mechanism has a transmission position where an output unit among the at least two output units is in a transmission connection to the transmission unit and a disengagement position where the clutch mechanism is disengaged from the shift mechanism, where when the clutch mechanism is in the disengagement position, the shift mechanism is rotatable with respect to the body.
An example provides a power tool including a body, an output assembly, a power mechanism, and a switch assembly. The body includes a first handle. The output assembly is disposed at an end portion of the first handle. The power mechanism includes an electric motor and a transmission unit which drive the output assembly to move. The switch assembly is disposed on the body and controls the power mechanism. The output assembly includes at least two output units spaced apart and used for connecting working accessories, and the output assembly is rotatable about a shift axis to shift an output unit among the at least two output units to a working position or a non-working position. The power tool further includes a clutch mechanism movably connected to a shift mechanism, where the clutch mechanism has a transmission position where the output unit is in a transmission connection to the transmission unit and a disengagement position where the clutch mechanism is disengaged from the output assembly, where when the clutch mechanism is in the disengagement position, the output assembly is rotatable with respect to the body.
In some examples, the first handle is supportively connected between the output assembly and the battery pack.
In some examples, the first handle is disposed obliquely with respect to the shift axis.
In some examples, an included angle between an axis of the first handle and the shift axis is greater than or equal to 10° and less than or equal to 60°.
In some examples, an included angle between an axis of an output unit and the standing surface is greater than or equal to 0° and less than or equal to 90°.
In some examples, the output unit in the working position is higher than the output unit in the non-working position.
In some examples, an axis of the first handle and the shift axis are in different planes and form a cross shape.
In some examples, the electric motor is disposed in the first handle.
In some examples, the switch assembly includes a trigger for controlling the electric motor to start or stop.
In some examples, the trigger includes a front limit position when the trigger is not operated, where an operation span between the front limit position and a front end portion of an output unit among the at least two output units along an axial direction of the output unit is less than or equal to 130 mm.
In some examples, a span of a whole machine between a rear limit position of the body and the front end portion of the output unit along the axial direction of the output unit is less than or equal to 195 mm.
In some examples, the power tool further includes the shift mechanism including mounting portions, where each of the at least two output units is supported by a respective one of the mounting portions, and the shift mechanism is rotatably disposed at the end portion of the first handle.
In some examples, a mounting portion is a U-shaped support including a connection base and a pair of sidewalls, where the connection base is connected between the pair of sidewalls.
In some examples, the shift mechanism further includes a shift unit connected to the mounting portions, and the shift unit is an annular frame rotatable about the shift axis.
In some examples, the power tool further includes the clutch mechanism movably connected to the shift mechanism, where the clutch mechanism has the transmission position where the output unit is in the transmission connection to the transmission unit and the disengagement position where the clutch mechanism is disengaged from the output unit, where when the clutch mechanism is in the disengagement position, the output unit is rotatable with respect to the body.
In some examples, the shift mechanism guides the clutch mechanism to move between the transmission position and the disengagement position.
In some examples, the clutch mechanism or the transmission unit is at least partially disposed between two output units spaced apart.
In some examples, the clutch mechanism includes a shaft sleeve and a moving member, where the moving member is connected to the shaft sleeve and the shaft sleeve is movably connected to the transmission unit and driven by the moving member to be connected to or disengaged from the output unit.
In some examples, the transmission unit includes a transmission shaft, where the transmission shaft includes a clutch transmission portion, the shaft sleeve is movably connected to the clutch transmission portion, and the transmission shaft transmits torque to the shaft sleeve via the clutch transmission portion.
In some examples, the clutch transmission portion includes a noncircular shaft disposed on an end portion of the transmission shaft, and the noncircular shaft mates with and is connected to a noncircular hole on the shaft sleeve.
In some examples, the output unit, the shaft sleeve, and the transmission shaft are disposed coaxially, the transmission position and the disengagement position are distributed along an axial direction of the transmission shaft, and the moving member drives the shaft sleeve to move along the axial direction of the transmission shaft.
In some examples, the shift mechanism includes a locking portion and an unlocking portion, where when the clutch mechanism is in the transmission position, the clutch mechanism mates with the locking portion and restrains the shift mechanism from rotating, and when the clutch mechanism is in the disengagement position, the clutch mechanism is disengaged from the locking portion and allows the shift mechanism to rotate.
In some examples, the locking portion includes multiple straight slots, the unlocking portion is an annular slot, the annular slot and the shift axis are disposed coaxially, and an end portion of each of the multiple straight slots intersects with the annular slot.
In some examples, the moving member includes a first connection portion adapted to be inserted into a straight slot and an annular slot, where the annular slot forms the disengagement position and the straight slot forms the transmission position.
In some examples, the shift mechanism further includes a shift unit connected to the mounting portions, and the shift unit is an annular frame rotatable about the shift axis.
In some examples, the shift unit is the annular frame rotatable about the shift axis.
In some examples, a locking portion includes locking slots distributed along a radial direction of the annular frame, where one of the locking slots causes the clutch mechanism to be in the transmission position.
In some examples, the shift mechanism is a shell-shaped structure and provided with an opening at a bottom of the shift mechanism.
In some examples, the shift unit is disposed at the opening.
In some examples, the shift mechanism is a U-shaped support including a connection base and a pair of sidewalls, where the connection base is connected between the pair of sidewalls.
In some examples, the clutch mechanism or the transmission unit is at least partially disposed between the pair of sidewalls.
In some examples, a torque transmission member is provided at another end of the shaft sleeve, and the output unit includes a clamping portion and a connection portion, where the clamping portion is used for mounting a working accessory, and the connection portion is in the transmission connection to the torque transmission member.
In some examples, the torque transmission member includes engagement slots disposed on the shaft sleeve, and the connection portion includes a transmission claw disposed on the output unit, where the engagement slots are adapted for insertion of the transmission claw.
In some examples, the body further includes a support housing disposed at a top of the first handle, where the support housing includes an output port and a rotation guide unit, and a mounting portion is slidably connected to the rotation guide unit.
In some examples, the power tool further includes a protective housing connected to the body, where a protective space is formed between the protective housing and the body and used for accommodating a working accessory in the non-working position.
In some examples, the transmission unit further includes a first bevel gear and a second bevel gear which mesh with each other, where the first bevel gear is coaxially connected to the transmission shaft.
In some examples, the body further includes a second handle, where the second handle is disposed at a rear end of the first handle.
In some examples, the battery pack is disposed at a bottom of the first handle and a bottom of the second handle, the battery pack includes the standing surface through which the power tool is capable of standing, and when the power tool stands, the orthographic projection of the center of gravity of the power tool on the standing surface is in the standing surface.
In some examples, a cross-section of the first handle and a cross-section of the second handle at any same height have unequal dimensions, where a height direction refers to a direction perpendicular to the standing surface.
In some examples, the switch assembly is disposed on the second handle.
In some examples, the power tool further includes a storage mechanism for storing unused accessories, where the storage mechanism is a storage bin or a storage clip, the storage bin is disposed in the body and has a lid which is openable and closeable, and the storage clip has slots for clamping the accessories.
The power tool in the examples of the present application has a proper center of gravity and is stable during use, structures inside a housing are compact, and the tool is more miniature. In the present application, operation steps of a user are simplified so that the user can perform a disconnection, a connection, and a shift with a single hand, improving user experience.
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In addition, although this example relates to the handheld power tool, it is to be understood that the present application is not limited to the disclosed examples but is applicable to other types of power tools, including, but not limited to, other tools which need to clamp working accessories, such as an electric drill.
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A cross-section of the first handle 111 and a cross-section of the second handle 112 at any same height have unequal dimensions, where a height direction refers to a direction perpendicular to a standing surface.
In this example, the battery pack 700 is disposed at a bottom end of the first handle 111 and a bottom end of the second handle 112, and optionally, the bottom end of the first handle 111 and the bottom end of the second handle 112 are connected through the battery pack. A connection base 113 adapted for mounting the battery pack 700 is further provided at the bottom end of the first handle 111 and the bottom end of the second handle 112, and conductive terminals electrically connected to the battery pack 700 are disposed on the connection base 113. The battery pack 700 includes a standing surface 710, where the tool 100 may stand on a surface of a worktable through the standing surface 710 of the battery pack 700, and in the example of the present application, an orthographic projection of a center of gravity of the power tool 100 on the standing surface 710 is in the standing surface 710. With the preceding arrangement, the case can be avoided where the tool stands unsteadily due to an unsteady center of gravity of the tool, thereby avoiding a safety hazard caused by the fall of the tool. When the tool stands on the worktable, part of a bottom surface of the battery pack 700 is in contact with an operation table and constitutes the standing surface 710. In an example, if the bottom surface of the battery pack 700 is a plane, the bottom surface of the battery pack 700 constitutes the standing surface 710.
The output assembly 200 in the example of the present application is disposed at a front end of the body 110, where the output assembly 200 includes at least two output units 210 spaced apart and used for connecting working accessories 900. Referring to
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In the example of the present application, an axis of the first handle 111 and the shift axis 201 are configured to intersect with each other. For example, the axis of the first handle 111 and the shift axis 201 may be in different planes and form a cross shape or may intersect with each other in the same plane. When the axis of the first handle 111 and the shift axis 201 are in the different planes and form the cross shape, an included angle α between the axis of the first handle 111 and the shift axis 201 is greater than or equal to 0° and less than or equal to 60°. When the axis of the first handle 111 and the shift axis 201 intersect with each other in the same plane, the included angle α between the axis of the first handle and the shift axis is greater than or equal to 10° and less than or equal to 60°.
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The control mechanism 400 mainly includes a control circuit board and is electrically connected to the switch assembly 800 and the electric motor 310 separately. The switch assembly 800 controls, through the control mechanism 400, the electric motor 310 to be on or off to switch a working state of the whole machine. The switch assembly 800 is disposed on the body 110, for example, the switch assembly 800 is disposed on the second handle 112, and the control mechanism 400 is disposed in the connection base 113. The control mechanism 400 is disposed in the connection base 113 so that the control mechanism is in the middle of the switch assembly 800, the electric motor 310, and the battery pack 700, which makes circuit arrangement easier, saves a space occupied by lines, and further reduces the dimension of the whole machine.
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If the operation span L1 is excessively long, the working accessory 900 is liable to have an unsteady state such as a swing in a working process, which increases the difficulty of the user in manipulation and is not conducive to operation of the user with a single hand. Therefore, the operation span is set in the preceding range, which is conducive to reducing the difficulty of the user in manipulation, facilitates the operation of the user with a single hand, and improves user experience.
The power tool in the example of the present application further includes a shift mechanism 500 and a clutch mechanism 600. As shown in
The shift mechanism 500 includes mounting portions 510 and a locking element, where a mounting portion 510 is used for mounting and supporting the output unit 210, and the locking element can implement the movement of the clutch mechanism 600 between a transmission position and a disengagement position.
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When the first connection portion 621 is at the end of the straight slot facing away from the annular slot, the clutch mechanism 600 is in the transmission position 601. In this case, the shaft sleeve 610 is driven by the moving member 620 to extend out via the output port 1141 of the support housing 114 and be connected to the output unit 210. Since the protrusion is in the straight slot, the shift mechanism 500 is restrained by the straight slot and the clutch mechanism from rotating with respect to the clutch mechanism 600. When the protrusion is in the position where the straight slot intersects with the annular slot, in other words, the protrusion is in the annular slot, the clutch mechanism 600 is in the disengagement position 602, and the shaft sleeve 610 is driven by the moving member 620 to be retracted into the support housing 114 and disengaged from the output unit 210. Since the protrusion is in the annular slot, the shift mechanism 500 may rotate with respect to the clutch mechanism 600.
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A torque transmission member is provided at the other end of the shaft sleeve 610 in the example of the present application, and a connection portion is provided at the other end of the output unit 210 without the clamping portion, where the connection portion in the transmission connection to the torque transmission member. For example, as shown in
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The storage bin 920 is disposed in a handle and has an openable lid and a storage space 921. In this example, the storage bin is disposed on a rear side of the second handle 112, the lid is opened toward the user, and the accessory 910 is placed in an engagement slot on an inner side of the lid or disposed in the storage space 921. In other examples, the storage bin 920 may be the preceding structure disposed in another position, a drawer-shaped structure, or the like, which is not limited herein.
The storage clip 930 is disposed on a surface of the housing, where the storage clip 930 has multiple slots where the accessories 910 are placed, and the accessories 910 are engaged in the slots. In an example, the storage clip 930 is made of soft rubber and disposed below the second handle 112 and behind the connection base 113.
When the power tool is used normally, the moving member 620 is in the transmission position 601, and the shaft sleeve 610 is in the transmission connection to the output unit 210 at the front end. In this case, the torque of the transmission shaft 321 of the gearbox may be normally transmitted to the output unit 210.
When the working accessory 900 needs to be shifted, the user manually pushes the operation portions 624 of the clutch mechanism 600 to cause the moving member 620 to move toward the rear end along the straight slot, and the shaft sleeve 610 is disengaged from the output unit 210 in the working position. When the moving member 620 moves to a top end of the straight slot and cannot continue to move, the moving member 620 is in the annular slot (that is, the moving member 620 is in the disengagement position), and at this time, the user may manually rotate the shift mechanism 500 to rotate the output unit in the working position to the non-working position and rotate the output unit in the non-working position to the working position.
When the user releases the operation portions 624, the moving member 620 automatically returns to the transmission position under the action of the biasing member, the shaft sleeve 610 is in the transmission connection to the output unit in the working position, and the output unit may work normally.
In the present application, the preceding shift mechanism and the preceding clutch mechanism which are linked to each other are provided such that the clutch mechanism and the shift mechanism are configured to collaborate. The clutch mechanism is in the transmission connection to the body and an output mechanism so that the output is transmitted or terminated. In addition, the clutch mechanism and the shift mechanism are linked to each other through the first connection portion, the locking portion, and the unlocking portion so that a shift and a rotation are allowed to be performed while a connection and a disconnection are performed. Thus, operation steps of the user are simplified so that the user can perform the disconnection, the connection, and the shift with a single hand, improving the user experience.
In another example of the present application, the locking element includes a shift unit 570, where the shift unit 570 includes a locking slot 571 for restraining the shift mechanism 500 from rotating with respect to the body.
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In the example of the present application, a dimension of the sleeve 560 along a direction of the output axis 202 is less than or equal to 100 mm. It is to be understood that as shown in
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The sleeve 560 includes support bosses disposed on the mounting portions 510, where a circular mounting hole is disposed on a support boss and penetrates through the support boss to fit the output unit 210, and the output unit 210 is supported in the mounting hole of the support boss.
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The annular frame is also provided with mounting slots 572 connected to the shift mechanism 500. Referring to
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The clutch mechanism 600 in this example further includes the biasing member 630 disposed at an end portion of the operation member 640, where the biasing member 630 applies a biasing force to the operation member 640 to cause the operation member 640 to drive the clutch mechanism to be in the transmission position, and after the user releases the operation member 640, the moving member 620 and the operation member 640 can return to the transmission position under the action of the biasing member 630.
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When the power tool is used normally, the moving member 620 is in the transmission position, and the shaft sleeve 610 is in the transmission connection to the output unit 210 at the front end. In this case, the torque of the transmission shaft 321 of the gearbox may be normally transmitted to the output unit 210.
When the working accessory 900 needs to be shifted, the user manually presses the operation member 640 to drive the moving member 620 to move toward a radial inner side of the locking slot 571 along the locking slot 571, the shaft sleeve 610 is disengaged from the output unit 210 in the working position, and the output unit 210 stops outputting power. After the moving member 620 moves until the moving member 620 is disengaged from the locking slot 571, the moving member 620 is in the disengagement position, and the user may apply a force to the shift mechanism 500, the output unit, or the working accessory manually or by means of an external object such as a wall or the worktable so that the shift mechanism 500 is rotated to rotate the output unit in the working position to the non-working position and rotate the output unit in the non-working position to the working position.
When the user releases the operation member 640, the operation member 640 automatically returns to an initial position under the action of the biasing member, the moving member 620 returns to the transmission position, the shaft sleeve 610 is in the transmission connection to the output unit 210 in the working position, and the output unit 210 may output power to the outside and work normally.
Number | Date | Country | Kind |
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202010631586.7 | Jul 2020 | CN | national |
202011158306.1 | Oct 2020 | CN | national |
202110624692.7 | Jun 2021 | CN | national |
202110625432.1 | Jun 2021 | CN | national |
This application is a continuation of International Application Number PCT/CN2021/101437, filed on Jun. 22, 2021, through which this application also claims the benefit under 35 U.S.C. § 119(a) of Chinese Patent Application No. CN 202010631586.7 filed Jul. 3, 2020, Chinese Patent Application No. CN 202011158306.1 filed Oct. 26, 2020, Chinese Patent Application No. CN 202110625432.1 filed Jun. 4, 2021, and Chinese Patent Application No. CN 202110624692.7 filed Jun. 4, 2021, which are incorporated by reference in their entireties.
Number | Date | Country | |
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Parent | PCT/CN2021/101437 | Jun 2021 | US |
Child | 18084601 | US |