Motor carbon brush profiling and polishing device and method

Abstract

The application discloses a motor carbon brush profiling polishing device and method, which comprises a base, a brush holder mechanism for mounting a carbon brush is arranged on the base, the brush holder mechanism can be adjusted in position, and a collector ring sliding block grinding stone for reciprocating polishing is realized through a handle and a transmission mechanism; the old carbon brush is disassembled and used for profiling polishing, so that the contact surface shape of the new carbon brush and the old carbon brush is consistent with the collector ring, the close contact of the new carbon brush with the motor collector ring after profiling polishing is ensured, and the working efficiency is ensured; in addition, the polishing device is small and simple in whole, is convenient to carry, and is convenient for carbon brush maintenance operation.

Description

Technical Field

[0001] This invention relates to the field of motor repair technology, and in particular to a motor carbon brush contour grinding device and method. Background Technology

[0002] During motor operation, the rotating and stationary parts are typically electrically connected via carbon brushes, which deliver excitation current from the excitation system to the rotor. Because carbon brushes are constantly worn, they need to be replaced periodically. However, installation errors can result in variations in the position and angle of each carbon brush. Therefore, each replacement brush requires grinding to ensure adequate contact area between the brush and the slip ring surface. Current technology involves sanding the brush against the slip ring surface after installation, but this method has two drawbacks: 1. Due to the material of the sandpaper, the bending angle, and the skill of the sander, the carbon brush and the ring surface may not fit completely after sanding, and there may still be gaps. The above defects will increase the contact resistance between the carbon brush and the ring surface, thereby causing defects such as carbon brush arcing and overheating. 2. Existing carbon brush polishing devices are mostly polishing machines or polishing tables, which are not suitable for on-site maintenance where they cannot be moved or are inconvenient to move. Furthermore, the carbon brushes need to be moved and polished one by one afterward, which can easily lead to confusion. Summary of the Invention

[0003] This invention provides a motor carbon brush contour grinding device and method, which aims to solve the problems of poor grinding effect and inconvenience of carrying and on-site grinding when grinding motor carbon brushes.

[0004] To solve the above-mentioned technical problems, the technical solution adopted by the present invention is as follows: A motor carbon brush contour grinding device includes a base with a horizontal mounting plane and a vertical mounting plane. The horizontal mounting plane and the vertical mounting plane cooperate to form an L-shaped structure. A brush holder mechanism is provided in the middle of the horizontal mounting plane with damping rotation. A carbon brush is detachably provided in the brush holder mechanism, and the end of the carbon brush to be ground faces the vertical mounting plane. A quick locking device is provided on one side of the brush holder mechanism. The brush holder mechanism is detachably fixed to the horizontal mounting plane through the quick locking device, and the quick locking device is synchronously rotated with the brush holder mechanism through an arc track on the horizontal mounting plane. The vertical mounting plane is provided with a simulated slip ring slider grinding stone on the side near the carbon brush. One side of the simulated slip ring slider grinding stone is connected to the vertical mounting plane through a transmission mechanism to form a vertical reciprocating movement engagement. The other side of the simulated slip ring slider grinding stone is connected to the end of the carbon brush to be ground to form a grinding engagement. A handle is provided on the side of the vertical mounting plane away from the carbon brush, and the handle is connected to the transmission mechanism for transmission engagement.

[0005] Preferably, the transmission mechanism includes a mounting plate disposed on the side of the vertical mounting plane near the brush grip mechanism, and the mounting plate is parallel to the vertical mounting plane. The simulated slip ring slider grinding stone is detachably fixed to the side of the mounting plate near the brush grip mechanism. A rack arranged vertically is provided on the side of the mounting plate away from the brush grip mechanism. A driving gear and a driven gear are provided on one side of the rack. The rack forms a reciprocating motion with the handle through the driving gear and the driven gear. The driving gear and the driven gear form a damped rotational engagement with the vertical mounting plane through the driving gear bearing and the driven gear bearing, respectively.

[0006] More preferably, the driving gear has only a few teeth on the opposite sides of the rim, and the teeth of the driving gear alternately mesh with the rack and the driven gear, and the driving gear is connected to the handle for transmission. The driven gear has teeth only within a certain angle range of its rim. The teeth of the driven gear mesh with the rack, and the teeth of the driven gear mesh alternately with the driving gear.

[0007] Furthermore, the brush holding mechanism includes a brush box and a constant pressure spring that cooperate with each other. The carbon brush is detachably embedded and fixed in the brush box by the constant pressure spring, and the constant pressure spring is located on the side of the brush box away from the vertical mounting plane. The break-in end of the carbon brush passes through the brush box and is located on the side of the brush box close to the vertical mounting plane. The bottom of the brush box is equipped with a rotating shaft, and a rotating hole is located in the middle of the horizontal mounting plane. The rotating hole is concentric and coaxial with the arc-shaped track. The rotating shaft of the brush box is embedded in the rotating hole and forms a damped rotational fit with the rotating hole through a damped rotary bearing.

[0008] Furthermore, one side of the brush box is provided with a limiting block that is in close contact with the horizontal mounting plane, and a quick locking device is provided on the limiting block, and the limiting block forms a releasable fixed engagement with the horizontal mounting plane through the quick locking device.

[0009] Specifically, the quick locking device includes a positioning pin, the cap end of which is embedded in an arc-shaped track, and the cap end and the arc-shaped track form a limiting sliding fit. The pin shaft of the positioning pin passes through the limiting block and is rotatably mounted with a pressing block through a rotating shaft. The rotating part of the pressing block is eccentrically mounted with the rotating shaft.

[0010] More specifically, when the clamping block rotates above the positioning pin, the rotating part of the clamping block is close to the limiting block on the side closer to the rotating shaft, and the limiting block slides with the horizontal mounting plane; When the clamping block rotates to be parallel to the limiting block, the rotating part of the clamping block, which is farther from the rotating shaft, contacts the limiting block and forms a squeezing fit. Under the pressure of the clamping block, the limiting block is fixedly fitted to the horizontal mounting plane.

[0011] A method for contour grinding of motor carbon brushes, using the aforementioned motor carbon brush contour grinding device, includes the following steps: Step 1: Check that the quick-locking device of the brush box is in the released position; Step 2: Remove the old carbon brushes that need to be replaced from the motor and fix the old carbon brushes in the brush box by the constant pressure spring of the brush holder mechanism; Step 3: Adjust the position of the brush box of the brush holder mechanism according to the old carbon brush. After adjustment, lock it with the quick locking device and install the new carbon brush for contour grinding. Step 4: Once the new carbon brush is in complete contact with the grinding stone of the slip ring slider without any gap, remove the new carbon brush, complete the carbon brush profiling and grinding work, and install the new carbon brush on the slip ring system of the running motor.

[0012] Preferably, Step 3 further includes the following steps: Step 301: Based on the shape of the contact surface between the old carbon brush and the slip ring, adjust the angle of the brush box by rotating it left and right around the rotating shaft. The limit block and quick locking device rotate synchronously on the arc track on the base until the brush surface of the old carbon brush is in complete contact with the imitation slip ring slider grinding stone, and then stop rotating. Step 302: Lock the brush box using the quick-locking device to ensure that the angle of the brush box is the same as the angle of the motor during actual operation of the old carbon brushes; Step 303: Remove the old carbon brush and fix the new carbon brush in the brush box with a constant pressure spring. The new carbon brush is in contact with the grinding stone of the imitation slip ring slider. Step 304: Crank the handle to make the simulated slip ring slider grinding stone move up and down in reciprocating motion through the transmission mechanism to grind the new carbon brush.

[0013] As a more preferred option, Step 304 further includes the following steps: When the handle is turned clockwise, the teeth on one side of the driving gear first mesh with the rack but not with the driven gear. The rack remains meshed with the driven gear. The rack is driven upward by the driving gear, and the driven gear is driven to rotate clockwise by the rack until the teeth of the driving gear disengage from the rack. At this point, the rack and driven gear stop at their current positions. As the driving gear continues to rotate clockwise, the teeth on the other side of the driving gear mesh with the driven gear but not with the rack. The rack remains meshed with the driven gear, and the driven gear is driven to rotate counterclockwise by the driving gear. The rack is driven to move downward by the driven gear until the teeth of the driving gear disengage from the driven gear. At this point, the rack and driven gear stop at their current positions, completing one up-and-down movement. The continuous rotation of the driving gear forms a reciprocating up-and-down movement engagement.

[0014] The beneficial effects of this invention are: 1. Adjusting the grinding angle between the carbon brush holder and the grinding stone using the old carbon brush ensures full contact between the new carbon brush and the surface of the current collector ring. 2. There is no need to grind the carbon brushes on the surface of the collector ring after installation. Grinding can be done before installation, and full contact between the carbon brushes and the surface of the collector ring can be guaranteed after installation. 3. By using a gear set, the rotary motion is converted into a high-precision reciprocating motion, which avoids the grinding errors caused by manually pulling sandpaper or manually reciprocating grinding blocks, thus improving the grinding accuracy. 4. Old carbon brushes are used to adjust the brush grip angle. Damped rotation is achieved through a rotating shaft and a damped rotary bearing, while a quick-locking device is used for limiting the position. 5. The grinding method of this patent uses a special grinding block with the same curvature as the slip ring to reciprocate up and down for grinding. The operator will not touch the grinding surface, thus ensuring the grinding accuracy. 6. The device used in this method is smaller in size than other similar devices, making it easier to carry and more suitable for on-site maintenance. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the device assembly of the present invention; Figure 2 This is a schematic diagram of the disassembly of the device of the present invention; Figure 3 This is a three-dimensional schematic diagram of the base of the present invention; Figure 4 This is a three-dimensional schematic diagram of the bottom of the brush box of the present invention; Figure 5 This is an assembly diagram of the transmission mechanism of the present invention. Figure 6 This is a schematic diagram of the disassembly of the quick-locking device of the present invention; In the diagram: 1. Brush box; 2. Constant pressure spring; 3. Carbon brush; 4. Base; 5. Damping rotary bearing; 6. Arc track; 7. Imitation slip ring slider grinding stone; 8. Quick locking device; 9. Limit block; 10. Handle; 11. Rack; 12. Drive gear; 13. Driven gear; 14. Drive gear bearing; 15. Driven gear bearing; 16. Mounting plate; 17. Horizontal mounting plane; 18. Vertical mounting plane; 19. Positioning pin; 20. Rotating shaft; 21. Clamping block. Detailed Implementation

[0016] The embodiments will be further described below with reference to the accompanying drawings.

[0017] like Figures 1-6As shown in the preferred embodiment 1, a motor carbon brush contour grinding device includes a base 4, on which a horizontal mounting plane 17 and a vertical mounting plane 18 are provided, and the horizontal mounting plane 17 and the vertical mounting plane 18 cooperate to form an L-shaped structure. A brush holding mechanism is provided in the middle position of the horizontal mounting plane 17 with damping rotation. A carbon brush 3 is detachably provided in the brush holding mechanism, and the end of the carbon brush 3 to be ground faces the vertical mounting plane 18. A quick locking device 8 is provided on one side of the brush holding mechanism. The brush holding mechanism is detachably fixed to the horizontal mounting plane 17 through the quick locking device 8, and the quick locking device 8 forms a synchronous rotational cooperation with the brush holding mechanism through the arc track 6 on the horizontal mounting plane 17. The vertical mounting plane 18 is provided with a simulated slip ring slider grinding stone 7 on the side near the carbon brush 3. One side of the simulated slip ring slider grinding stone 7 forms a vertical reciprocating movement engagement with the vertical mounting plane 18 through a transmission mechanism. The other side of the simulated slip ring slider grinding stone 7 forms a grinding engagement with the end of the carbon brush 3 to be ground. The vertical mounting plane 18 is provided with a handle 10 on the side away from the carbon brush 3. The handle 10 is engaged with the transmission mechanism.

[0018] Example 1 provides a motor carbon brush contour grinding device. The device is convenient to carry and install. The base 4 serves as the mounting base, making the device compact and simple. When moving, the base 4 and the above-mentioned mounting device can be picked up or moved directly. The horizontal mounting plane 17 of the base 4 serves as the mounting plane of the carbon brush 3. The carbon brush 3 is detachably fixed by the brush holder mechanism. The brush holder mechanism can be damped to rotate on the horizontal mounting plane 17, which makes it easy to adjust the angle of the brush holder mechanism according to the old carbon brush 3. This facilitates subsequent contour grinding, that is, grinding the new carbon brush 3 into the same shape as the old carbon brush 3, which makes it easy to fit with the current collector ring. The adjusted brush holder mechanism is locked by the quick locking device 8. The quick locking device 8 is installed on the brush holder mechanism and rotates synchronously along the arc track 6 during the rotation adjustment process. The vertical mounting plane 18 serves as the mounting plane for the imitation slip ring slider grinding stone 7, making the grinding surface of the imitation slip ring slider grinding stone 7 tangent to the end of the carbon brush 3 to be ground, which facilitates grinding the carbon brush 3. During the contour grinding process, the driving force is provided by shaking the handle 10. The handle 10 drives the imitation slip ring slider grinding stone 7 to move back and forth in the vertical direction through the transmission mechanism to grind the carbon brush 3. This facilitates implementation and operation, reduces the complexity and size of the device, makes it easy to carry, and facilitates maintenance operations.

[0019] As a preferred embodiment 2, the transmission mechanism includes a mounting plate 16 disposed on the side of the vertical mounting plane 18 near the brush grip mechanism, and the mounting plate 16 is parallel to the vertical mounting plane 18. The simulated slip ring slider grinding stone 7 is detachably fixed to the side of the mounting plate 16 near the brush grip mechanism. The side of the mounting plate 16 away from the brush grip mechanism is provided with a rack 11 arranged in the vertical direction. One side of the rack 11 is provided with a driving gear 12 and a driven gear 13. The rack 11 forms a reciprocating motion with the handle 10 through the driving gear 12 and the driven gear 13. The driving gear 12 and the driven gear 13 form a damped rotational engagement with the vertical mounting plane 18 through the driving gear bearing 14 and the driven gear bearing 15, respectively.

[0020] As a preferred embodiment 3, the driving gear 12 has only a few teeth on the opposite sides of the rim, and the teeth of the driving gear 12 alternately mesh with the rack 11 and the driven gear 13, and the driving gear 12 is connected to the handle 10 for transmission. The driven gear 13 has teeth only within a certain angle range of its rim. The teeth of the driven gear 13 mesh with the rack 11, and the teeth of the driven gear 13 mesh alternately with the driving gear 12.

[0021] Examples 2 and 3 provide a reciprocating motion transmission structure and method. When the handle is continuously cranked, the teeth on one side of the driving gear 12 first mesh with the rack 11, driving the rack 11 to move in one direction, thereby driving the mounting plate 16 and the simulated slip ring slider grinding stone 7 on it to move in that direction. The rack 11 drives the driven gear 13 to rotate in the same direction as the driving gear 12. When the teeth on that side of the driving gear 12 disengage from the rack 11, the driven gear 13 stops at that position because of the damping rotational engagement formed by the driving gear bearing 14 and the driven gear bearing 15 with the vertical mounting plane 18, thereby stopping the rack 11 at that position. As the handle continues to be cranked, the teeth on the other side of the drive gear 12 mesh with the driven gear 13, causing the driven gear 13 to rotate in the opposite direction to the drive gear 12. The driven gear 13 drives the rack 11 to move in the other direction, thereby causing the mounting plate 16 and the simulated slip ring slider grinding stone 7 on it to move in that direction. When the teeth on that side of the drive gear 12 disengage from the driven gear 13, the driven gear 13 stops at that position due to the damping rotational engagement formed by the drive gear bearing 14 and the driven gear bearing 15 with the vertical mounting plane 18, thus stopping the rack 11 at that position, completing one reciprocating motion. Subsequently, the two processes alternate during the continuous cranking of the handle, thereby achieving reciprocating grinding.

[0022] By using a gear set to convert rotary motion into high-precision reciprocating motion, the grinding errors caused by manually pulling sandpaper or manually reciprocating grinding blocks are avoided, thus improving grinding accuracy.

[0023] In a preferred embodiment 4, the drive gear 12 has two teeth on each of the opposite sides of the rim; The driven gear 13 has nine consecutive teeth on one side of its rim; The driving gear 12 and the driven gear 13 have the same rim size and the same tooth size. The rack 11 has the same tooth size as the driving gear 12, which facilitates meshing and reciprocating motion.

[0024] As a preferred embodiment 5, from the side where the handle is located towards the brush box, the rack 11 is located on the left, the driving gear 12 and the driven gear 13 are located on the right, and the driving gear 12 is located above the driven gear 13.

[0025] As a preferred embodiment 6, the rack 11 and the mounting plate 16 are integrally formed to ensure the synchronous movement of the mounting plate 16 and the stability during movement.

[0026] As a preferred embodiment 7, the brush holder mechanism includes a brush box 1 and a constant pressure spring 2 that cooperate with each other. The carbon brush 3 is detachably embedded and fixed in the brush box 1 by the constant pressure spring 2. The constant pressure spring 2 and the brush box 1 form the commonly used brush holder structure. The constant pressure spring 2 is located on the side of the brush box 1 away from the vertical mounting plane 18. The break-in end of the carbon brush 3 passes through the brush box 1 and is located on the side of the brush box 1 close to the vertical mounting plane 18, which makes it convenient for the carbon brush 3 to approach the imitation slip ring slider grinding stone 7 after installation, so as to facilitate grinding. The bottom of the brush box 1 is provided with a rotating shaft, and a rotating hole is provided in the middle of the horizontal mounting plane 17. The rotating hole is concentric and coaxial with the arc track 6. The rotating shaft of the brush box 1 is embedded in the rotating hole and forms a damped rotational fit with the rotating hole through the damped rotary bearing 5, which facilitates the damped rotation of the brush box 1 around the shaft to adjust its position.

[0027] In a preferred embodiment 8, a limiting block 9 is provided on one side of the brush box 1, which is in close contact with the horizontal mounting plane 17. A quick-locking device 8 is provided on the limiting block 9, and the limiting block 9 forms a releasable fixed engagement with the horizontal mounting plane 17 through the quick-locking device 8. When the quick-locking device 8 is not locked, the limiting block 9 rotates synchronously with the rotation of the brush box 1. After locking, the brush box 1 is synchronously limited and fixed with the limiting block 9.

[0028] As a preferred embodiment 9, the quick locking device 8 includes a positioning pin 19, the cap end of the positioning pin 19 is embedded in the arc-shaped track 6, and the cap end and the arc-shaped track 6 form a limiting sliding fit. The pin shaft of the positioning pin 19 passes through the limiting block 9 and is rotatably mounted on a pressing block 21 via a rotating shaft 20. The rotating part of the pressing block 21 is eccentrically mounted and fitted with the rotating shaft 20.

[0029] In a preferred embodiment 10, when the clamping block 21 rotates above the positioning pin 19, the rotating part of the clamping block 21 is close to the limiting block 9 on the side closer to the rotating shaft 20, and the limiting block 9 slides with the horizontal mounting plane 17. When the clamping block 21 rotates to be parallel to the limiting block 9, the rotating part of the clamping block 21, which is farther away from the rotating shaft 20, contacts the limiting block 9 and forms a pressing fit. Under the pressure of the clamping block 21, the limiting block 9 is fixedly fitted with the horizontal mounting plane 17.

[0030] Examples 9 and 10 provide the structure and locking method of the quick locking device 8. By eccentrically engaging the clamping block 21 with the rotating shaft, the pressure exerted on the limiting block 9 by the clamping block 21 at different positions is inconsistent, thereby completing quick locking or unlocking.

[0031] As a preferred embodiment 11, the clamping block 21 has a whistle-shaped structure, with the cylindrical end used for eccentric mounting of the rotating shaft and the extended section used for rotation under force.

[0032] As a preferred embodiment 12, a method for contour grinding of motor carbon brushes, using the aforementioned motor carbon brush contour grinding device to grind the carbon brushes, includes the following steps: Step 1: Check that the quick-locking device 8 of brush box 1 is in the released state; Step 2: Remove the old carbon brush 3 that needs to be replaced from the motor, and fix the old carbon brush 3 in the brush box 1 by the constant pressure spring 2 of the brush holder mechanism; Step 3: Adjust the position of the brush holder 1 according to the old carbon brush 3. After the adjustment is completed, lock it through the quick locking device 8. Install the new carbon brush 3 and perform contour grinding. Through contour grinding, grind the new carbon brush 3 into the same shape as the old carbon brush 3 to ensure tight contact with the collector ring. Step 4: After the new carbon brush 3 is in complete contact with the imitation slip ring slider grinding stone 7 without any gap, remove the new carbon brush 3 to complete the carbon brush imitation grinding work, and install the new carbon brush 3 on the slip ring system of the running motor.

[0033] As a preferred embodiment 13, Step 3 further includes the following steps: Step 301: Based on the shape of the contact surface between the old carbon brush 3 and the slip ring, adjust the angle of the brush box 1 by rotating it left and right around the rotating shaft. The limiting block 9 and the quick locking device 8 rotate synchronously on the arc track 6 on the base 4 until the brush surface of the old carbon brush 3 is in complete contact with the imitation current collector ring slider grinding stone 7, and then stop rotating. Step 302: Lock the brush box 1 using the quick locking device 8 to ensure that the angle of the brush box 1 is the same as the angle of the motor in actual operation as the old carbon brush 3. Step 303: Remove the old carbon brush 3 and fix the new carbon brush 3 in the brush box 1 by the constant pressure spring 2. The new carbon brush 3 contacts the imitation collector ring slider grinding stone 7. Step 304: Crank the handle 10 to make the simulated slip ring slider grinding stone 7 move up and down in reciprocating motion through the transmission mechanism to grind the new carbon brush 3.

[0034] Provides specific steps for contour polishing.

[0035] As a preferred embodiment 14, Step 304 further includes the following steps: When the handle 10 is cranked to drive the drive gear 12 to rotate clockwise, the teeth on one side of the drive gear 12 first mesh with the rack 11 but not with the driven gear 13. The rack 11 and the driven gear 13 remain meshed. The rack 11 is driven upward by the drive gear 12, and the driven gear 13 is driven to rotate clockwise by the rack 11 until the teeth of the drive gear 12 disengage from the rack 11. At this time, the rack 11 and the driven gear 13 stop at their current positions. As the driving gear 12 continues to rotate clockwise, the teeth on the other side of the driving gear 12 mesh with the driven gear 13 but not with the rack 11. The rack 11 remains meshed with the driven gear 13, and the driven gear 13 is driven by the driving gear 12 to rotate counterclockwise. The rack 11 is driven by the driven gear 13 to move downward until the teeth of the driving gear 12 disengage from the driven gear 13. At this point, the rack 11 and the driven gear 13 stop at their current positions, completing one up-and-down movement. The continuous rotation of the driving gear 12 forms a reciprocating up-and-down movement engagement.

[0036] The reciprocating grinding operation in Example 14 corresponds to the arrangement in Example 5. Rotating the handle 10 clockwise is only one way; it can also be rotated counterclockwise. As long as the handle is continuously rotated in one direction, reciprocating grinding can be achieved.

[0037] As a preferred embodiment 15, the handle 10 can be replaced with a small motor, which ensures easy portability, reduces manual labor, and improves polishing efficiency.

[0038] As a preferred embodiment 16, the horizontal mounting plane 17 has an opening on the side near the vertical mounting plane 18. The opening facilitates the passage of the simulated slip ring slider grinding stone 7 and the mounting plate 16 during reciprocating grinding, thus avoiding conflict between the plane and the grinding motion.

[0039] Working principle of the invention: During normal motor operation, the prolonged grinding between the slip ring surface and the carbon brush 3 ensures full contact between the carbon brush 3 and the ring surface. The overcurrent end face of the carbon brush 3 will form a specific angle shape at its specific installation position. Since the main motion of the slip ring is circumferential rotation, the end faces of each carbon brush 3 are only slightly different in the circumferential direction of the slip ring. This difference can cause defects such as overheating and arcing when a new carbon brush 3 is first installed, because prolonged grinding causes the old carbon brush 3 to become shorter. This invention utilizes the specific angle shape of the old carbon brush 3 to be replaced. In the grinding device, the grinding angle is adjusted to grind the new carbon brush 3, so that the specific angle shape of the new and old carbon brushes 3 is consistent, ensuring full contact between the new carbon brush 3 and the slip ring surface.

Claims

1. A motor carbon brush contour grinding device, characterized in that, Includes a base (4), on which a horizontal mounting plane (17) and a vertical mounting plane (18) are provided, and the horizontal mounting plane (17) and the vertical mounting plane (18) cooperate to form an L-shaped structure. A brush holding mechanism is provided in the middle position of the horizontal mounting plane (17) in a damped rotatable manner. A carbon brush (3) is detachably provided in the brush holding mechanism, and the end of the carbon brush (3) to be polished faces the vertical mounting plane (18). A quick locking device (8) is provided on one side of the brush holding mechanism. The brush holding mechanism is fixedly engaged with the horizontal mounting plane (17) by means of the quick locking device (8), and the quick locking device (8) is engaged with the brush holding mechanism in a synchronous rotational manner by means of the arc track (6) on the horizontal mounting plane (17). The vertical mounting plane (18) is provided with a simulated collector ring slider grinding stone (7) on the side near the carbon brush (3). One side of the simulated collector ring slider grinding stone (7) is connected to the vertical mounting plane (18) through a transmission mechanism to form a vertical reciprocating movement cooperation. The other side of the simulated collector ring slider grinding stone (7) is connected to the end of the carbon brush (3) to be ground to form a grinding cooperation. The vertical mounting plane (18) is provided with a handle (10) on the side away from the carbon brush (3). The handle (10) is connected to the transmission mechanism for transmission cooperation. The brush holding mechanism includes a brush box (1) and a constant pressure spring (2) that cooperate with each other. The carbon brush (3) is detachably embedded and fixed in the brush box (1) by the constant pressure spring (2). The constant pressure spring (2) is located on the side of the brush box (1) away from the vertical mounting plane (18). The running end of the carbon brush (3) passes through the brush box (1) and is located on the side of the brush box (1) close to the vertical mounting plane (18). The bottom of the brush box (1) is provided with a rotating shaft, and a rotating hole is provided in the middle of the horizontal mounting plane (17). The rotating hole is concentric and coaxial with the arc track (6). The rotating shaft of the brush box (1) is embedded in the rotating hole and forms a damped rotational fit with the rotating hole through the damped rotary bearing (5).

2. The motor carbon brush contour grinding device according to claim 1, characterized in that, The transmission mechanism includes a mounting plate (16) located on the side of the vertical mounting plane (18) near the brush grip mechanism, and the mounting plate (16) is parallel to the vertical mounting plane (18). The simulated collector ring slider grinding stone (7) is detachably fixed to the side of the mounting plate (16) near the brush grip mechanism. The side of the mounting plate (16) away from the brush grip mechanism is provided with a rack (11) arranged in the vertical direction. The rack (11) is provided with a driving gear (12) and a driven gear (13) on one side. The rack (11) forms a reciprocating motion with the handle (10) through the driving gear (12) and the driven gear (13). The driving gear (12) and the driven gear (13) form a damped rotational engagement with the vertical mounting plane (18) through the driving gear bearing (14) and the driven gear bearing (15), respectively.

3. The motor carbon brush contour grinding device according to claim 2, characterized in that, The driving gear (12) has only a few teeth on the opposite sides of the rim, and the teeth of the driving gear (12) mesh alternately with the rack (11) and the driven gear (13). The driving gear (12) is connected to the handle (10) for transmission. The driven gear (13) has teeth only within a certain angle range of the rim. The teeth of the driven gear (13) mesh with the rack (11), and the teeth of the driven gear (13) mesh alternately with the driving gear (12).

4. The motor carbon brush contour grinding device according to claim 1, characterized in that, The brush box (1) has a limiting block (9) on one side that is in close contact with the horizontal mounting plane (17). A quick locking device (8) is provided on the limiting block (9), and the limiting block (9) forms a releasable fixed fit with the horizontal mounting plane (17) through the quick locking device (8).

5. The motor carbon brush contour grinding device according to claim 4, characterized in that, The quick locking device (8) includes a positioning pin (19). The cap end of the positioning pin (19) is embedded in the arc-shaped track (6), and the cap end and the arc-shaped track (6) form a limiting sliding fit. The pin shaft of the positioning pin (19) passes through the limiting block (9) and is rotatably mounted on the clamping block (21) through the rotating shaft (20). The rotating part of the clamping block (21) is eccentrically mounted and fitted with the rotating shaft (20).

6. The motor carbon brush contour grinding device according to claim 5, characterized in that, When the clamping block (21) rotates to above the positioning pin (19), the rotating part of the clamping block (21) is close to the limiting block (9) on the side closer to the rotating shaft (20), and the limiting block (9) slides with the horizontal mounting plane (17); When the clamping block (21) rotates to be parallel to the limiting block (9), the rotating part of the clamping block (21) is far from the rotating shaft (20) and contacts the limiting block (9) to form a squeezing fit. Under the pressure of the clamping block (21), the limiting block (9) is fixedly fitted with the horizontal mounting plane (17).

7. A method for contour grinding of motor carbon brushes, characterized in that, The process of polishing carbon brushes using the motor carbon brush contour polishing device according to any one of claims 1 to 6 includes the following steps: Step 1: Check that the quick-locking device (8) of the brush box (1) is in the released state; Step 2: Remove the old carbon brush (3) that needs to be replaced from the motor and fix the old carbon brush (3) in the brush box (1) by the constant pressure spring (2) of the brush holder mechanism; Step 3: Adjust the position of the brush box (1) of the brush holder mechanism according to the old carbon brush (3), lock it through the quick locking device (8) after adjustment, and install the new carbon brush (3) for contour grinding; Step 4: When there is no gap and complete contact between the new carbon brush (3) and the imitation slip ring slider grinding stone (7), remove the new carbon brush (3), complete the carbon brush imitation grinding work, and install the new carbon brush (3) on the slip ring system of the running motor.

8. The method for contour grinding of motor carbon brushes according to claim 7, characterized in that, Step 3 also includes the following steps: Step 301: Based on the shape of the contact surface between the old carbon brush (3) and the slip ring, adjust the angle of the brush box (1) by rotating it left and right around the rotating shaft. The limiting block (9) and the quick locking device (8) rotate synchronously on the base (4) along the arc track (6) until the brush surface of the old carbon brush (3) is in complete contact with the imitation current collector ring slider grinding stone (7), and then stop rotating. Step 302: Lock the brush box (1) using the quick locking device (8) to ensure that the angle of the brush box (1) is the same as the angle of the motor in actual operation as the old carbon brush (3); Step 303: Remove the old carbon brush (3) and fix the new carbon brush (3) in the brush box (1) by the constant pressure spring (2). The new carbon brush (3) contacts the imitation collector ring slider grinding stone (7). Step 304: Crank the handle (10) to make the simulated collector ring slider grinding stone (7) move up and down and reciprocate through the transmission mechanism to grind the new carbon brush (3).

9. The method for contour grinding of motor carbon brushes according to claim 8, characterized in that, Step 304 also includes the following steps: When the handle (10) is cranked to drive the driving gear (12) to rotate clockwise, the teeth on one side of the driving gear (12) first mesh with the rack (11) but not with the driven gear (13). The rack (11) and the driven gear (13) remain meshed. The rack (11) is driven upward by the driving gear (12), thus mimicking the upward movement of the slip ring slider grinding stone (7) for grinding. The driven gear (13) is driven clockwise by the rack (11) until the teeth of the driving gear (12) disengage from the rack (11). At this time, the rack (11) and the driven gear (13) stop at the current position. As the driving gear (12) continues to rotate clockwise, the teeth on the other side of the driving gear (12) mesh with the driven gear (13) but not with the rack (11). The rack (11) and the driven gear (13) remain meshed. The driven gear (13) is driven to rotate counterclockwise by the driving gear (12). The rack (11) is driven to move downward by the driven gear (13), thus mimicking the downward movement of the slip ring slider grinding stone (7) for grinding, until the teeth of the driving gear (12) disengage from the driven gear (13). At this time, the rack (11) and the driven gear (13) stop at the current position, completing one up-and-down movement. The continuous rotation of the driving gear (12) forms a reciprocating up-and-down movement engagement.

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