This application claims the benefit under 35 U.S.C. ยง 119(a) of Chinese Patent Application No. CN 201910516067.3, filed on Jun. 14, 2019, and Chinese Patent Application No. CN 201910664593.4, filed on Jul. 23, 2019, each of which is incorporated by reference in its entirety herein.
The present disclosure relates to an electric tool, and more particularly to a polishing machine.
Before polishing workpieces such as automobiles and parts, users usually need to sand the scratches and rough parts on the workpieces. Therefore, users may need multiple tools to realize the work on the workpieces at the same time, which not only increases the cost, but also lower the work efficiency.
In one aspect of the disclosure, a polishing machine includes a housing, a motor, a first execution assembly, a second execution assembly, a limiting member and an operation member. The housing includes a handle portion for a user gripping. The motor is disposed in the housing. The main shaft is rotatable relative to the housing about a first axis. The first execution assembly is configured for connecting to a first accessory, where, the first execution assembly includes a first rotation member and a first output member, the first rotation member is configured for connecting to the main shaft and is rotatable about the first axis under driving of the main shaft in response to connecting to the main shaft; the first output includes a first driving portion for connecting to the first accessory so as to drive the first accessory to rotate about a second axis; the second axis coincides with the first axis. The second execution assembly is configured for connecting to a second accessory, where, the second execution assembly includes a second rotation member and a second output member, the second rotation member is configured for connecting to the main shaft and is rotatable about the first axis under driving of the main shaft in response to connecting to the main shaft; the second output member includes a second driving portion for connecting to the second accessory to drive the second accessory, the second output member is rotatable relative to the second rotation member about a third axis; the third axis is parallel to the first axis, and a distance between the third axis and the first axis is greater than or equal to 1 mm and less than or equal to 12 mm. The limiting member is movable between a first position and a second position, where, the limiting member is configured to, in condition that the limiting member is at the first position, prevent the first rotation member or the second rotation member from moving relative to the main shaft; and the limiting member is further configured to, in condition that the limiting member is at the second position, allow the first rotation member or the second rotation member to move relative to the main shaft. And the operation member configured to, in condition that the operation member is operated, allow the limiting operation to disengage from the first position.
In another aspect of the disclosure, a polishing machine includes a housing, a motor, a first execution assembly, a second execution assembly, a limiting member and an operation member. The housing includes a handle portion for a user gripping. The motor is disposed in the housing. The main shaft is rotatable relative to the housing about a first axis. The first execution assembly is configured for connecting to a first accessory, where, the first execution assembly includes a first rotation member and a first output member, the first rotation member is configured for connecting to the main shaft and is rotatable about the first axis under driving of the main shaft in response to connecting to the main shaft; the first output includes a first driving portion for connecting to the first accessory to drive the first accessory, the first output member is rotatable relative to the first rotation member about a second axis, the second axis is parallel to the first axis, and a distance between the second axis and the first axis is greater than or equal to 1 mm and less than or equal to 3 mm. The second execution assembly is configured for connecting to a second accessory, where, the second execution assembly includes a second rotation member and a second output member, the second rotation member is configured for connecting to the main shaft and is rotatable about the first axis under driving of the main shaft in response to connecting to the main shaft; the second output member includes a second driving portion for connecting to the second accessory to drive the second accessory, the second output member is rotatable relative to the second rotation member about a third axis; the third axis is parallel to the first axis, and a distance between the third axis and the first axis is greater than or equal to 1 mm and less than or equal to 12 mm. The limiting member is movable between a first position and a second position, where, the limiting member is configured to, in condition that the limiting member is at the first position, prevent the first rotation member or the second rotation member from moving relative to the main shaft; and the limiting member is further configured to, in condition that the limiting member is at the second position, allow the first rotation member or the second rotation member to move relative to the main shaft. And the operation member configured to, in condition that the operation member is operated, allow the limiting operation to disengage from the first position.
In another aspect of the disclosure, a polishing machine includes a housing, a motor, a first execution assembly, a limiting member and an operation member. The housing includes a handle portion for a user gripping. The motor is disposed in the housing. The main shaft is rotatable relative to the housing about a first axis. The first execution assembly is configured for connecting to a first accessory, where, the first execution assembly includes a first rotation member and a first output member, the first rotation member is configured for connecting to the main shaft and is rotatable about the first axis under driving of the main shaft in response to connecting to the main shaft; the first output includes a first driving portion for connecting to the first accessory to drive the first accessory, the first output member is rotatable relative to the first d rotation member about a second axis; the second axis is parallel to the first axis, and a distance between the second axis and the first axis is greater than or equal to 1 mm and less than or equal to 12 mm. The limiting member is movable between a first position and a second position, where, the limiting member is configured to, in condition that the limiting member is at the first position, prevent the first rotation member from moving relative to the main shaft; and the limiting member is further configured to, in condition that the limiting member is at the second position, allow the first rotation member to move relative to the main shaft. And the operation member is configured to, in condition that the operation member is operated, allow the limiting operation to disengage from the first position.
As shown in
The motor 12 is disposed in the housing 11. The main shaft 13 is rotatable about a first axis 101 relative to the housing 11, and the main shaft 13 outputs the power when the main shaft 13 is rotating. The main engine 10a may be detachably connected to the first execution assembly 50, thereby facilitating the user to replace different execution assembly according to the needs. The polishing machine 100 further includes a second execution assembly 60 for connecting to a second accessory 60a. When the first execution assembly 50 is disassembled, the user may connect the second execution assembly 60 to the main engine 10a, so that the main engine 10a outputs the power to the second execution assembly 60, and the second execution assembly 60 drives the second accessory 60a to move to realize the second function different from the first function. It can be understood that, the first function may be one or more of the following: sanding, polishing and waxing, and the second function may also be one or more of the following: sanding, polishing and waxing. Both the first function and the second function may be sanding, polishing or waxing. In one example, both the first function and the second function are sanding; the difference is that, the first function may realize sanding with a first precision, and the second function may realize sanding with a second precision.
The polishing machine 100 further includes a third execution assembly 70 for connecting to a third accessory 70a. When the first execution assembly 50 or the second execution assembly 60 is disassembled, the user may connect the third execution assembly 70 to the main engine 10a, so that the main engine 10a outputs the power to the third execution assembly 70, and the third execution assembly 70 drives the third accessory 70a to move to realize a third function.
When the user needs to perform three processes, namely sanding, polishing and waxing, on the automobiles and the workpieces, the user only needs one polishing machine 100 installed with different execution assemblies to complete the three processes, which facilities the user's operation, saves the cost and improves the work efficiency.
In the present example, the main engine 10a further includes an installation assembly 20 for detachably installing the above-mentioned first execution assembly 50, the second execution assembly 60 or the third execution assembly 70 to the main shaft 13. As shown in
The first execution assembly 50 includes a first rotation member 51 and a first output member 52. The first rotation member 51 is configured for connecting to the main shaft 13. The first rotation member 51 may be driven by the main shaft 13 to rotate about the first axis 101 when the first rotation member 51 is connected to the main shaft 13, and the first rotation member 51 is a rotation shaft. The first output member 52 includes a first driving portion 521 for connecting to the first accessory 50a, and the first driving portion 521 may drive the first accessory 50a to rotate about a second axis 102, where the second axis 102 coincides with the first axis 102. The first driving portion 521 is a hole or a post centered on the second axis 102. In the present example, the first rotation member 51 and the first output member 52 are integrally formed. In this way, when the first rotation member 51 is driven by the main shaft 13 to rotate about the first axis 101, the first output member 52 drives the first accessory 50a to rotate about the first axis 101. The first accessory 50a is centered on the first axis 101, and the first execution assembly 50 drives the first accessory 50a to rotate without eccentricity.
The second execution assembly 60 includes a second rotation member 61 and a second output member 62. The second rotation member 61 is configured for connecting to the main shaft 13. The second rotation member 61 may be driven by the main shaft 13 to rotate about the first axis 101 when the second rotation member 61 is connected to the main shaft 13, and the second rotation member 61 is a rotation shaft. The second output member 62 includes a second driving portion 621 for connecting to the second accessory 60a, and the second driving portion 621 may drive the second accessory 60a to rotate. The second output member 62 is rotatably connected to the second rotation member 61, and the second output member 62 is rotatable about a third axis 103 relative to the second rotation member 61. A distance L1 between the third axis 103 and the first axis 101 is greater than or equal to 1 mm, and less than or equal to 12 mm. The second driving portion 621 is a hole or a post centered on the third axis 103. In the present example, since the second output member 62 is connected to the second rotation member 61, the second output member 62 simultaneously drives the second accessory 60a to revolve around the first axis 101 when the second rotation member 61 is rotated about the first axis 101. When the polishing machine 100 is turned on to perform the work on the workpiece, the second output member 62 drives the second accessory 60a to revolve around the first axis 101 under the driving of the second rotation member 61; at the same time, since the second accessory 60a is in contact with the workpiece, the workpiece generates a friction force on the second accessory 60a, and the friction force drives a whole formed by the second accessory 60a and the second output member 62 to rotate about the third axis 103 relative to the second rotation member 61. That is to say, when the main engine 10a is installed with the second execution assembly, the second accessory 60a rotates about the third axis 103 while revolving around the first axis 101. In the present example, the second rotation member 61 is further connected with a second counterweight 63, so as to improve the balance of the polishing machine 100 when the second execution assembly 60 is installed.
The third execution assembly 70 includes a third rotation member 71 and a third output member 72 which are configured for connecting to the main shaft 13. The third rotation member 71 is configured for connecting to the main shaft 13. The third rotation member 71 may be driven by the main shaft 13 to rotate about the first axis 101 when the third rotation member 71 is connected to the main shaft 13, and the third rotation member 71 is a rotation shaft. The third output member 72 includes a third driving portion 721 for connecting to the third accessory 70a, and the third driving portion 721 may drive the third accessory 70a to rotate. The third output member 72 is rotatably connected to the third rotation member 71, and the third output member 72 is rotatable about a fourth axis 104 relative to the third rotation member 71. A distance L2 between the fourth axis 104 and the first axis 101 is greater than or equal to 1 mm, and less than or equal to 3 mm. The third portion 721 is a hole or a post centered on the fourth axis 104. In the present example, since the third output member 72 is connected to the third rotation member 71, the third output member 72 simultaneously drives the third accessory 70a to revolve around the first axis 101 when the third rotation member 71 is rotated about the first axis 101. When the polishing machine 100 is turned on to perform the work on the workpiece, the third output member 72 drives the third accessory 70a to revolve around the first axis 101 under the driving of the third rotation member 71; at the same time, since the third accessory 70a is in contact with the workpiece, the workpiece generates a friction force on the third accessory 70a, and the friction force drives a whole formed by the third accessory 70a and the third output member 72 to rotate about the fourth axis 104 relative to the third rotation member 71. That is to say, when the main engine 10a is installed with the third execution assembly, the third accessory 70a rotates about the fourth axis 104 while revolving around the first axis 101. In the present example, the third rotation member 71 is further connected with a third counterweight 73, so as to improve the balance of the polishing machine 100 when the third execution assembly 70 is installed.
As shown in
As shown in
The polishing machine 100 further includes a transmission assembly 14 and an inner housing 15. The transmission assembly 14 is configured to transmit the power between the motor 12 and the main shaft 13. The inner housing 15 is disposed in the housing 11, and configured for accommodating the transmission assembly 14.
The housing 11 includes a head housing 112 located at a front end of the handle portion 111 and a coupling portion 113 located at a rear end of the handle portion 113. The head housing 112 is configured for accommodating the main shaft 13. The coupling portion 113 is configured for installing a battery pack 16. The battery pack 16 is connected to the housing 11 to supply power to the motor 12. The motor 12 is disposed in the handle portion 111. The motor 12 includes a motor shaft 121 rotatable about a rotation axis 106, the motor shaft 121 is connected to the transmission assembly 14, and the transmission assembly 14 is connected to the main shaft 13, so that the transmission assembly 14 may transmit the power outputted by the motor shaft 121 to the main shaft 13. The rotation axis 106 is perpendicular to the first axis 101. Part of the inner housing 15 is disposed in the head housing 112, and the inner housing 15 accommodates the transmission assembly 15 and further accommodates part of main shaft 13. One part of the main shaft 13 is disposed in the inner housing 15, and other part of the main shaft 13 extends out of the inner housing 15. The limiting member 21 is located in the housing 11, and also located outside the inner housing 15. The operation member 22 is located outside the housing 11. One part of the operation member 22 extends into the housing 11, and does not extend into the inner housing 15, so that both the operation member 22 and the limiting member 21 are located outside the inner housing 15, so that the inner housing 15 can effectively seal the transmission assembly 14 located in the inner housing 15 from dust and water.
The installation assembly 20 further includes a first biasing element 23, a driving member 24 and a second biasing element 25. The first biasing element 23 biases the operation member 22 to generate a biasing force for driving the operation member 22 to reset. The first biasing element 23 is a first spring, part of which is sleeved outside the head housing 112, and the first spring is located between the head housing 112 and the operation member 22. One end of the first spring biases the head housing 112, another end of the first spring biases the operation member 22. The operation member 22 surrounds the first axis 101 and is a sleeve, and the operation member 22 is sleeved outside the head housing 112, so that the operation member 22 may slide along the first axis 101 relative to the head housing 112. A guiding member 114 is fixed at a lower end of the head 112. The guiding member 114 is made of metal, and the guiding member 114 guides the operation member 22 to slide along the first axis 101, so that the operation member 22 slides more smoothly. The head housing 112 is made of plastic, and the guiding member 114 is a metal member, thereby avoiding a situation that the operation member 22 slides non-smoothly and the head housing 112 is deformed or damaged caused by directly guiding the operation member 22 by the head housing 112. Both the operation member 22 and the guiding member 114 surround the first axis 101, the guiding member 114 protrudes downward out of the head housing 112. One part of the first spring is sleeved onto the head housing 112, and the other part of the first spring is sleeved outside the guiding member 114. Similarly, one part of the operation member 22 is sleeved onto the head housing 112, and the other part of the operation member 22 is sleeved outside the guiding member 114. The operation member 22 further protrudes downward out of the guiding member 114, so that both the guiding member 114 and the operation member 22 may play a role of protecting the user. The limiting member 21 is disposed outside the inner housing 15, and the guiding member 114 is fixedly connected to the head housing 112. The guiding member 114 further includes a covering portion 114a, and the covering portion 114a covers part of an opening 112a of the head housing 112 open downward, so that the guiding member 114 may effectively protect the limiting member 21 which is located outside the inner housing 15 and inside the housing 11.
The driving member 24 is configured for contacting with the limiting member 21 to drive the limiting member 21 to move to the first position, and the second biasing element 25 generates a biasing force for driving the limiting member 21 to move toward the first position. As shown in
The operation member 22 is further formed with a contact portion 221 which is in contact with the sleeve, and the contact portion 221 extends into the housing 11. When the operation member 22 slides upward, the contact portion 221 pushes the driving member 24 upward to compress the second biasing element 25, at this moment, the driving surface 241 is no longer in contact with the limiting member 21. The driving member 24 is further formed with a second surface 242. When the driving member 24 moves upward until the second surface 242 is aligned with the limiting member 21, the limiting member 21 is no longer squeezed by the driving surface 241, at this moment, the driving member 24 allows the limiting member 21 to disengage from the contact of the first rotation member 51, so that the user may pull out the first execution assembly 50.
As shown in
Similarly, the second rotation member 61 is formed with a second groove 611 having substantially the same structure as the first groove 511, and the third rotation member 71 is formed with a third groove 711 having substantially the same structure as the first groove 511.
The housing 11 has a straight cylindrical shape, which reduces the occupied space and is convenient for use and transportation. As shown in
In one example, the housing 11 is configured to be separated from the outer rotor 123 of the motor 12, preventing the housing 11 from interfering with the outer rotor 123 of the motor 12.
A centrifugal fan 124 is disposed at one end of the motor 12, and an axial fan 125 is disposed at another end of the motor 12. The centrifugal fan 124 is located at one of the motor 12 facing toward the transmission assembly 14. The axial fan 125 is configured to guide airflow to flow into an exterior of the housing 11 from an interior of the housing 11. The airflow flows into the interior of the housing 11 from the exterior of the housing 11, and then flows through the motor 12, and finally flows out of the housing 11, so that the heat in the housing 11 may be taken away and the motor 12 is subject to better heat dissipation.
As shown in
The stator supporter 128 is further fixedly connected to the inner housing 15, further improving the sealing effect.
An air outlet 11a is disposed on a position of the housing 11 corresponding to the centrifugal fan 124, and an air inlet 11b is disposed on a position of the housing 11 adjacent to the coupling portion 113. A heat dissipation passage is formed between the air inlet 11b and the air outlet 11a, so as to dissipate heat from the motor 12 and improve cooling effect.
The circuit board 17 is disposed in the handle portion 111, and located between the motor 12 and the coupling portion 113. The circuit board 17 is located on a rear side of the circuit board 17, so that the heat dissipation airflow may simultaneously dissipate heat from the circuit board 17 and the motor 12.
As shown in
The housing 111 extends along a second straight line 107 parallel to the rotation axis 106. The operation switch 19 is slidably connected with the housing 11 substantially along the second straight line 107, or the operation switch 19 is rotatable relative to the housing 11 about an axis parallel to the rotation axis 106. When the user grips the handle portion 111, the four fingers of the human hand are bent, the thumb of the human hand extends substantially along the second straight line 107, and the user may use the thumb to operate the operation switch 19 along the second straight line 107.
The operation switch 19 is a slide switch, such as a push button, substantially extending along the second straight line 107, and the operation switch 19 is slidably connected with the housing 11 substantially along the second straight line 107.
As shown in
The operation switch 19 is further provided with a fixing portion 193 for fixing the operation switch 19 to a preset position of the housing 11, and the housing 11 is provided with a cooperation portion 11d for cooperating with the fixing portion 193. In one example, the fixing portion 193 is disposed at the bottom of the operation switch 19, and extends along a direction perpendicular to the second straight line 107. In one example, the cooperation portion 11d is a passage allowing at least part of the fixing portion 193 to pass through.
When the operation switch 19 moves relative to the housing 11 to a preset position, the motor 12 has a maximum rotation speed which is greater than the rotation speed of the motor 12 when the operation switch 19 is at any position other than the preset position. When the rotation speed of the motor 12 needs to be maintained at the maximum rotation speed, the user operates the second operation portion 192 to push the operation switch 19 to the preset position and then depress the first operation portion 191, such that the fixing portion 193 of the operation switch 19 is inserted into the cooperation portion 11d; and then the user releases the operation switch 19 to keep the operation switch 19 at the preset position, so that the motor 12 may run at the maximum rotation speed all the time.
The polishing machine 100 further includes at least one speed governing member 194, and the motor 12 has at least two different gear rotation speeds. The speed governing member 194 is configured for adjusting the maximum rotation speed to a preset gear rotation speed, and the maximum rotation speed is equal to the preset gear rotation speed. In other words, the speed governing member 194 is configured for quickly adjusting the maximum rotation speed of the motor 12. In the present example, two speed governing members 194, namely increasing and decreasing, are provided, and four gear rotation speeds are provided. When the user operates the speed governing members 194, the rotation speed of the motor 12 may be quickly switched between the four gear rotation speeds so as to switch the preset gear rotation speed to one of the four gear rotation speeds. At the same time, since the maximum rotation speed of the motor 12 is equal to the preset gear rotation speed, the rotation speed of the motor 12 may only be switched between zero and the preset gear rotation speed when the user adjusts the stroke of the operation switch 19.
In one example, the speed governing member 194 is a button-type member, and the user may depress the speed governing member 194 to adjust the gear rotation speed of the motor 12. In the present example, the housing 11 is provided with two speed governing members 194, namely a speed increasing button and a decreasing button. The increasing button is marked with a plus sign and the decreasing button is marked with a minus sign, which is convenient for the user to identify. A gear light is disposed adjacent to the speed governing member 194, so that the gear rotation speed of the motor 12 is visualized. In one example, a same number of gear lights and gear rotation speeds is provided. In the present example, the motor 12 is provided with four different gear rotation speeds, which are a first-level gear rotation speed to a fourth-level gear rotation speed, respectively; therefore, four gear lights are provided. When the gear rotation speed is the first-level gear rotation speed, one gear light is turned on; when the gear rotation speed is the second-level gear rotation speed, two gear lights are turned on, and so on.
In the present example, a process of moving the operation switch 19 to the stop portion 11c from the turn-on position is defined as a low-speed stage. In other words, during the process of moving the operation switch 19 to the stop portion 11c from the turn-on position, the motor 12 is rotated at a rotation speed less than or equal to the preset rotation speed all the time. When the motor 12 needs to rotate at a low speed in a short time, the user may only operate the first operation portion 191 to stop the operation switch 19 at the stop portion 11c, and does not need to operate the second operation portion 192, thereby facilitating the user's multi-scenario operation.
A reciprocal of a ratio of a change value of the moving stroke of the operation switch 19 to a change value of the corresponding rotation speed of the motor 12 is defined as a speed governing rate. The operation switch 19 is further provided with a high speed stage in which the motor 12 is rotated at a rotation speed greater than or equal to the preset rotation speed, and a speed governing rate in the high speed stage is greater than a speed governing rate in the low speed stage. In the present example, a process where the operation switch 19 bypasses the gear portion and moves to the preset position is a high speed stage. In the high speed stage and the low speed stage, the rotation speed of the motor 12 is linearly changed with the stroke of the operation switch 19. In other words, the speed governing rates in the low and high speed stage each are fixed values, and the speed governing rate in the high speed stage is greater than the speed governing rate in the low speed stage. The design of the speed governing rate is more suitable for the use scenario of the polishing machine 100, enables that the rotation speed is quickly increased to the maximum rotation speed to perform polishing after the polishing liquid is fully spread, and has higher practicality.
The basic principles, main features and advantages of the present disclosure have been shown and described above. It is to be understood by any person skilled in the art that the foregoing examples are not intended to limit the present disclosure in any form. All technical solutions obtained by equivalent substitution or equivalent transformation are within the scope of the present disclosure.
Number | Date | Country | Kind |
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201910516067.3 | Jun 2019 | CN | national |
201910664593.4 | Jul 2019 | CN | national |