Motorcycle brake pedal inner hole polishing equipment

Abstract

The invention relates to the technical field of inner hole grinding, and discloses motorcycle brake pedal inner hole grinding equipment which comprises a machining table, a pedal body is placed on the machining table, a middle protrusion is arranged in the middle of the pedal body, a mounting hole is formed in the middle of the middle protrusion, and the motorcycle brake pedal inner hole grinding equipment further comprises a positioning mechanism, a grinding mechanism, a jacking mechanism and a clamping driving mechanism. The positioning mechanism and the jacking mechanism are arranged on the two opposite sides of the machining table correspondingly and used for fixing the pedal body in a matched mode. The positioning guide strip matched with the middle protrusion of the pedal body is arranged, and rapid and accurate pre-positioning is achieved through the structural characteristics of the pedal; by means of the linkage design of a special-shaped jacking cam and a transverse moving cam in the clamping driving mechanism, an operator only needs to rotate a deflection handle once, the two actions of clamping of a pedal body and feeding of a grinding head can be sequentially completed, the operation steps are obviously simplified, and the machining efficiency is improved.

Description

Technical Field

[0001] This invention relates to the field of internal hole grinding technology, specifically a grinding device for the internal hole of a motorcycle brake pedal. Background Technology

[0002] As a key component of the motorcycle braking system, the motorcycle brake pedal typically consists of a flat body, a reinforcing section protruding upwards in the middle of the body, and a mounting hole penetrating the reinforcing section and the body. This mounting hole is primarily used for hinged assembly with transmission components such as brake linkages, shafts, or connecting pins, thereby enabling the pedal's pivoting drive function. To reduce production costs, improve efficiency, and meet the demands of large-scale manufacturing, motorcycle brake pedals are currently mostly manufactured using a one-piece casting process. However, the casting process is limited by factors such as mold precision, material flowability, and cooling shrinkage. The inner wall of the mounting hole after casting is often relatively rough, with lower dimensional accuracy, and prone to casting defects such as burrs and flash. This makes it difficult to directly meet the technical requirements of precision assembly. Therefore, subsequent precision machining and grinding of the mounting hole are necessary to ensure its precise fit with components such as linkages.

[0003] In existing technologies, grinding the mounting holes of motorcycle brake pedals typically involves using specialized jigs to fix the pedal in place before grinding with mechanical equipment. Because the pedal body is not a simple flat structure, but has a protrusion in the middle, its overall shape is irregular, making stable and reliable clamping and positioning difficult during grinding. When using jigs for fixing, the complex shape of the pedal often requires designing multiple clamping points to overcome the positioning difficulties caused by its irregular shape; for example, it may be necessary to clamp both the flat body and the protruding part simultaneously. This results in cumbersome clamping steps, complex jig structures, and frequent adjustments to accommodate different batches of pedals, leading to long processing auxiliary time and severely impacting production efficiency. Therefore, how to simplify the clamping process for grinding the inner holes of motorcycle brake pedals and improve grinding efficiency and accuracy has become a technical problem urgently needing to be solved by those skilled in the art. Summary of the Invention

[0004] This invention provides a grinding device for the inner hole of a motorcycle brake pedal, which solves the problems mentioned in the background art.

[0005] To achieve the above objectives, the present invention provides the following technical solution: A grinding device for the inner hole of a motorcycle brake pedal includes a processing table, on which a pedal body is placed. A central protrusion is provided in the middle of the pedal body, and a mounting hole is provided in the center of the central protrusion. The device also includes a positioning mechanism, a grinding mechanism, a clamping mechanism, and a clamping drive mechanism. The positioning mechanism and the clamping mechanism are respectively disposed on opposite sides of the processing table for cooperating to fix the pedal body. The positioning mechanism includes two symmetrically arranged positioning guides fixedly connected to the side of the processing table. The two positioning guides extend in opposite directions away from the side of the processing table. The vertical distance between the positioning guides and the surface of the processing table is greater than the thickness of the pedal body and less than the height between the mounting hole and the surface of the processing table. The minimum distance between the two positioning guides is greater than the width of the central protrusion. The grinding mechanism is disposed on the side of the processing table for grinding the mounting hole. The clamping drive mechanism drives the clamping mechanism and the grinding mechanism to move synchronously toward the pedal body.

[0006] As a preferred embodiment of the present invention, the clamping mechanism includes a transverse clamping frame slidably connected to the processing table, and the grinding mechanism includes a transverse seat slidably connected to the side of the processing table. The moving direction of the transverse seat is perpendicular to the moving direction of the transverse clamping frame. A main shaft is rotatably connected to the side of the transverse seat near the pedal body, and a grinding head that mates with the mounting hole is connected to the end of the main shaft.

[0007] As a preferred embodiment of the present invention, the clamping drive mechanism includes a shaped lifting cam and a transverse cam rotatably connected to the processing table. The contour side of the shaped lifting cam abuts against the transverse clamping frame. A transverse beam is fixedly connected to the bottom of the transverse seat. The transverse beam abuts against the contour side of the transverse cam. The clamping drive mechanism also includes a synchronous rotation component for driving the shaped lifting cam and the transverse cam to rotate synchronously.

[0008] As a preferred embodiment of the present invention, the synchronous rotation assembly includes a driven gear coaxially and fixedly connected to the irregular lifting cam, a rack slidably connected to the processing table at the end of the transverse beam, the rack meshing with the driven gear, a fixed plate fixedly provided in the middle of the processing table, and a return spring provided between the fixed plate and the transverse beam, the return spring being used to drive the transverse beam to move in a direction away from the center of the processing table.

[0009] As a preferred embodiment of the present invention, the profile of the irregular lifting cam is composed of a first arc surface, a variable diameter arc surface, a second arc surface, and a transition arc surface connected end to end. The radius of the first arc surface is smaller than the radius of the second arc surface, and the variable diameter arc surface is an arc structure with a gradually increasing radius. When the irregular lifting cam rotates to push the transverse clamping frame to move toward the positioning mechanism, the first arc surface, the variable diameter arc surface, and the second arc surface sequentially contact the transverse clamping frame.

[0010] As a preferred embodiment of the present invention, two sliding rods are slidably passed through the transverse clamping frame. A clamping plate that abuts against the side of the pedal body is fixedly connected to one end of the sliding rod near the positioning mechanism. A clamping spring is provided between the clamping plate and the transverse clamping frame. The clamping spring is sleeved on the sliding rod. A stop protrusion for restricting the movement of the pedal body along its length direction is provided at one end of the clamping plate near the grinding mechanism.

[0011] As a preferred embodiment of the present invention, side positioning blocks are provided on both sides of the positioning guide strip and fixedly connected to the processing table. The side of the side positioning block near the positioning guide strip is inclined toward the side of the processing table. A middle positioning block is provided between the two positioning guide strips and fixedly connected to the processing table. The middle positioning block has an L-shaped structure and is used to assist in positioning the middle part of the pedal body.

[0012] As a preferred embodiment of the present invention, the processing table is inclined toward the ground on the side where the clamping mechanism is provided, and the bottom of the processing table is provided with bottom support legs for supporting the processing table.

[0013] The present invention has the following advantages: 1. Highly efficient clamping: Utilizing the central protrusion of the pedal body as a positioning reference, and in conjunction with the outward-expanding positioning guide bar, it achieves rapid self-guidance and vertical limiting, eliminating the need for complex clamps and completely solving the cumbersome clamping problem caused by the irregular shape of the pedal, thus significantly shortening the auxiliary time.

[0014] 2. Process Integration: Through the linkage design of the irregular lifting cam and the transverse cam, and with the synchronous rotation component, the operator only needs to turn the deflection handle once to complete the pedal clamping and grinding head feeding in sequence, combining the two processes into one, which significantly improves the processing cycle and efficiency.

[0015] 3. Quality Improvement: The profile of the irregular lifting cam ensures stable and reliable clamping; after clamping, the grinding head can still move axially by fine adjustment through the deflection handle, avoiding uneven grinding and improving the smoothness of the inner wall of the mounting hole and the assembly accuracy.

[0016] 4. Easy to operate: The tilting design of the processing table, combined with the return spring, enables automatic material unloading; the length of the deflection handle is adjustable and the height conforms to ergonomics, effectively reducing labor intensity and making it highly practical. Attached Figure Description

[0017] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0018] Figure 1 This is a schematic diagram of a device for grinding the inner hole of a motorcycle brake pedal.

[0019] Figure 2 This is a right view of a device for grinding the inner hole of a motorcycle brake pedal.

[0020] Figure 3 This is a schematic diagram of the clamping mechanism in a motorcycle brake pedal inner hole grinding device, showing the clamping mechanism holding the pedal body in place.

[0021] Figure 4 This is a schematic diagram of the structure below the processing table after the brake pedal body is clamped in a grinding device for the inner hole of a motorcycle brake pedal.

[0022] Figure 5 for Figure 4 A bottom view.

[0023] Figure 6 This is a schematic diagram of the positioning mechanism in a grinding device for the inner hole of a motorcycle brake pedal.

[0024] Figure 7 This is a schematic diagram of the structure of a motorcycle brake pedal inner hole grinding device, showing the cooperation between the pedal body and the positioning mechanism.

[0025] Figure 8 This is a schematic diagram of the structure below the processing table after the pedal body is separated from the positioning mechanism in a grinding equipment for the inner hole of a motorcycle brake pedal.

[0026] Figure 9 This is a schematic diagram of the structure of a grinding device for the inner hole of a motorcycle brake pedal when the first arc surface abuts against the transverse clamping frame.

[0027] Figure 10 This is a schematic diagram of the structure of a grinding device for the inner hole of a motorcycle brake pedal, showing the cooperation between a shaped lifting cam and a transverse clamping frame.

[0028] In the diagram: 1. Bottom support leg; 2. Machining table; 3. Pedal body; 4. Central protrusion; 5. Positioning mechanism; 6. Grinding mechanism; 7. Clamping mechanism; 8. Clamping drive mechanism; 9. Irregular lifting cam; 10. Rack; 11. Driven gear; 12. Fixing plate; 13. Return spring; 14. Transverse beam; 15. Synchronous rotation assembly; 16. Transverse cam; 17. Rotating shaft; 18. Deflection handle; 19. Transverse seat; 20. Transverse clamping frame; 21. First arc surface; 22. Variable diameter arc surface; 23. Second arc surface; 24. Transition arc surface; 25. Side positioning block; 26. Central positioning block; 27. Positioning guide bar; 28. Guide slope; 29. ​​Sliding rod; 30. Clamping spring; 31. Clamping plate; 32. Mounting hole; 33. Spindle; 34. Grinding head; 35. Material stop protrusion. Detailed Implementation

[0029] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0030] In one embodiment, see Figure 1 , Figure 3 , Figure 4 and Figure 6 A grinding device for the inner hole of a motorcycle brake pedal includes a processing table 2 for placing the pedal body 3 to be processed. The pedal body 3 has an integrally formed upward-protruding central protrusion 4 in its center, and a through mounting hole 32 is formed in the center of the central protrusion 4. To achieve automated positioning and grinding of the pedal body 3, the device also includes a positioning mechanism 5, a grinding mechanism 6, a clamping mechanism 7, and a clamping drive mechanism 8. The positioning mechanism 5 is fixedly disposed on the rear side of the processing table 2, while the clamping mechanism 7 is slidably disposed on the front side of the processing table 2. During operation, the clamping mechanism 7 pushes the pedal body 3 backward, causing it to embed into the positioning mechanism 5 from front to back, thereby achieving rapid and stable fixing of the pedal body 3.

[0031] The positioning mechanism 5 includes two symmetrically arranged positioning guides 27. Viewed from the side, the positioning guides 27 have an L-shaped structure, and their rear ends are fixed to the rear side of the processing table 2 by bolts. The bolt connection facilitates the disassembly and replacement of the positioning guides 27 to accommodate different sizes of pedal bodies 3. After adjustment, the minimum gap between the two positioning guides 27 is slightly larger than the width of the central protrusion 4, ensuring that the central protrusion 4 can be precisely inserted between them. The side of the positioning guides 27 away from the processing table 2 extends outwards in opposite directions, forming an "outward-expanding" guide structure. The front end of the positioning guides 27 has an inlet arc surface, facilitating the rapid sliding of the central protrusion 4 into the positioning area. In addition, the vertical distance between the positioning guide 27 and the table surface of the processing table 2 is designed to be greater than the thickness of the pedal body 3 and less than the height between the bottom of the mounting hole 32 and the table surface of the processing table 2. This size restriction ensures that the pedal body 3 can be inserted between the positioning guide 27 and the processing table 2. At the same time, the central protrusion 4 is limited between the two positioning guides 27, thereby forming an effective vertical limit on the pedal body 3 and preventing it from vertically displacing during the grinding process.

[0032] The grinding mechanism 6 is located on the right side of the processing table 2 and is used to perform fine machining on the inner wall of the mounting hole 32. The clamping drive mechanism 8 is used to drive the clamping mechanism 7 and the grinding mechanism 6 to move synchronously towards the pedal body 3, realizing the linkage action of clamping first and then grinding.

[0033] In one instance of this embodiment, please refer to Figures 3-10 The clamping mechanism 7 includes a transverse clamping frame 20, which has a U-shaped structure. Its left and right sides slide against grooves on the front side of the processing table 2, allowing for reciprocating movement in the front and back directions. The grinding mechanism 6 includes a transverse base 19, which is vertically positioned and slidably connected to a left-right oriented groove on the right side of the processing table 2. A mounting bracket is fixed to the upper left side of the transverse base 19, and a left-right oriented rotating shaft 17 is rotatably connected to the mounting bracket. A grinding head 34 is fixedly connected to the left end of the rotating shaft 17. When the transverse base 19 moves to the left, the grinding head 34 can be inserted into the mounting hole 32. A rotary drive device (such as a motor) is also provided on the right side of the transverse base 19 to drive the rotating shaft 17 to rotate at high speed, thereby driving the grinding head 34 to grind the mounting hole 32.

[0034] The clamping drive mechanism 8 includes a shaped lifting cam 9 rotatably connected to the lower front surface of the machining table 2, and a transverse cam 16 rotatably connected to the lower right side surface of the machining table 2. Viewed from the top, when the shaped lifting cam 9 rotates clockwise, its rear profile side abuts against the front side of the lower part of the transverse clamping frame 20, thereby pushing the transverse clamping frame 20 to move backward. Simultaneously, a transverse beam 14 oriented front-to-back is fixedly connected to the lower end of the transverse seat 19. When the transverse cam 16 rotates clockwise, it pushes the transverse beam 14 to the left, thereby moving the transverse seat 19 to the left, thus feeding the grinding head 34. To achieve synchronized operation, a synchronous rotation assembly 15 is provided on the front side of the machining table 2.

[0035] The synchronous rotation assembly 15 includes a rack 10 and a driven gear 11 for meshing transmission. The driven gear 11 is coaxially fixed to the irregular lifting cam 9, while the rack 10 is oriented left and right, with its middle part slidably connected to a slide groove at the bottom of the processing table 2 via a slider to ensure lateral stability. The right end of the rack 10 is fixedly connected to the front end of the transverse beam 14. Therefore, when the transverse cam 16 rotates and pushes the transverse beam 14 to move to the left, the transverse beam 14 drives the irregular lifting cam 9 to rotate synchronously through the meshing transmission of the rack 10 and the driven gear 11, thereby realizing the linkage between the grinding mechanism 6 and the clamping mechanism 7. To ensure that the transverse beam 14 always abuts against the transverse cam 16, a front-to-back oriented fixing plate 12 is provided in the middle of the lower surface of the processing table 2, and a return spring 13 is provided between the fixing plate 12 and the transverse beam 14. The return spring 13 is in a compressed state, always providing a spring force to the transverse beam 14 to move to the right. To prevent the spring from falling off, corresponding protruding posts are provided on the fixed plate 12 and the transverse beam 14, and the return spring 13 is sleeved on the protruding post. For ease of operation, a vertically arranged rotating shaft 17 is rotatably connected to the right end of the processing table 2. The lower end of the rotating shaft 17 is fixedly connected to the transverse cam 16, and the upper end is fixedly connected to the deflection handle 18. For labor-saving operation, the deflection handle 18 can adopt a telescopic sleeve structure to achieve adjustable length.

[0036] The profile of the irregularly shaped lifting cam 9 consists of a first arc surface 21, a variable-diameter arc surface 22, a second arc surface 23, and a transition arc surface 24 connected end to end. The radius of the first arc surface 21 is smaller than the radius of the second arc surface 23. The variable-diameter arc surface 22 is an arc structure with a gradually increasing radius, specifically a quarter-elliptical arc surface. Initially, the first arc surface 21 abuts against the transverse clamping frame 20. When the irregularly shaped lifting cam 9 begins to rotate, the variable-diameter arc surface 22 gradually contacts the transverse clamping frame 20, pushing it to move backward. When the second arc surface 23 contacts, the radius reaches its maximum, and the transverse clamping frame 20 moves to its rearmost end, at which point the pedal body 3 is fully clamped. Afterward, the irregularly shaped lifting cam 9 continues to rotate, but the transverse clamping frame 20 stops moving, while the transverse cam 16 continues to drive the grinding head 34 to insert into the mounting hole 32 to the left for grinding. When rotating in the opposite direction, it is reset sequentially via the second arc surface 23, the variable diameter arc surface 22, and the first arc surface 21.

[0037] To maintain the stability of the clamping force, sliding rods 29 oriented forward and backward are slidably installed on the left and right sides of the upper end of the transverse clamping frame 20. A clamping plate 31 oriented left and right is fixedly connected to the rear end of the sliding rod 29. A clamping spring 30 is provided between the clamping plate 31 and the transverse clamping frame 20, and the clamping spring 30 is sleeved on the outside of the sliding rod 29. When the transverse clamping frame 20 moves backward, the clamping plate 31 abuts against the front end of the pedal body 3, and the clamping spring 30 is compressed, thereby providing a continuous elastic clamping force. A stop protrusion 35 is also provided on the rear right end of the clamping plate 31 to prevent the pedal body 3 from sliding to the right during placement, achieving rapid positioning.

[0038] In one instance of this embodiment, please refer to Figure 3 and Figure 6 The positioning guide strip 27 has side positioning blocks 25 fixedly connected to the processing table 2 on both sides. The side of the side positioning block 25 near the positioning guide strip 27 is set as a guide slope 28 inclined towards the side of the processing table 2. From the top view, the two side positioning blocks 25 are distributed in a figure-eight shape. When the pedal body 3 is pushed backward by the clamping mechanism 7, the left and right ends of its rear side will abut against the guide slopes 28 on both sides to achieve lateral positioning. A middle positioning block 26 is also provided between the two positioning guide strips 27. The middle positioning block 26 has an L-shaped structure, with its upper part extending forward and the front end provided with a guide slope 28. When the pedal body 3 moves backward, its rear side is inserted into the interior of the middle positioning block 26, and the distance between the upper end of the middle positioning block 26 and the table surface of the processing table 2 is equal to the thickness of the pedal body 3, thereby achieving vertical limitation of the pedal body 3.

[0039] In one instance of this embodiment, please refer to Figure 1 and Figure 2The front side of the processing table 2 is inclined downwards, so that when the transverse clamping frame 20 moves forward, the pedal body 3 can automatically slide forward along the inclined table surface, facilitating material unloading. C-shaped bottom legs 1 are provided on the left and right sides of the bottom of the processing table 2 to stably support the processing table 2 on the ground and ensure its height meets ergonomic requirements.

[0040] This embodiment includes the following steps during implementation: 1. Loading steps: The operator places the pedal body 3 to be processed on the processing table 2, keeping the central protrusion 4 facing upward, so that the front side of the pedal body 3 is against the rear side of the clamping plate 31, and at the same time, the central protrusion 4 is roughly aligned with the gap between the two positioning guides 27.

[0041] 2. Clamping Procedure: The operator manually rotates the deflection handle 18. From a top view, the deflection handle 18 drives the transverse cam 16 to rotate clockwise. The transverse cam 16 pushes the transverse beam 14 to move to the left, and the transverse beam 14 drives the transverse seat 19 to move to the left simultaneously. Simultaneously, the transverse beam 14, through the meshing of the rack 10 and driven gear 11, drives the irregularly shaped lifting cam 9 to rotate clockwise, thereby pushing the transverse clamping frame 20 to move backward. The clamping plate 31 then pushes the pedal body 3 backward. The central protrusion 4 first enters between the two positioning guides 27, achieving initial guidance; subsequently, the rear side of the pedal body 3 inserts into the central positioning block 26, and the left and right ends abut against the side positioning blocks 25 on both sides. When the second arc surface 23 of the irregularly shaped lifting cam 9 contacts the transverse clamping frame 20, the transverse clamping frame 20 stops moving, and the pedal body 3 is completely clamped and fixed.

[0042] 3. Grinding Steps: After the pedal body 3 is clamped, the grinding head 34 and the mounting hole 32 are exactly coaxial. At this time, the transverse cam 16 continues to rotate, driving the transverse seat 19 to move to the left via the transverse beam 14, and the grinding head 34 is then inserted into the mounting hole 32. The rotary drive device drives the grinding head 34 to rotate at high speed, grinding the inner wall of the mounting hole 32. The diameter of the grinding head 34 gradually increases from left to right. During the grinding process, the operator can slightly rotate the deflection handle 18 left and right to make the grinding head 34 move slightly axially within the mounting hole 32, thereby improving the uniformity of grinding and surface quality.

[0043] 4. Unloading Steps: After grinding, rotate the deflection handle 18 in the opposite direction. First, the transverse cam 16 rotates in the opposite direction, driving the transverse seat 19 to move to the right via the transverse beam 14, causing the grinding head 34 to be pulled out of the mounting hole 32. Simultaneously, the irregular lifting cam 9 rotates in the opposite direction, causing the first arc surface 21 to re-contact with the transverse clamping frame 20, pushing the transverse clamping frame 20 forward to reset. The pedal body 3 then slides forward along the inclined processing table 2, disengaging from the positioning mechanism 5. The operator can then remove the ground pedal body 3 and place the next workpiece to be processed, entering the next work cycle.

[0044] This invention provides a grinding device for the inner hole of a motorcycle brake pedal. By using a positioning guide 27 that matches the central protrusion 4 of the pedal body 3, rapid and precise pre-positioning is achieved by utilizing the pedal's own structural features. Through the linkage design of the irregularly shaped lifting cam 9 and the transverse cam 16 in the clamping drive mechanism 8, the operator only needs to rotate the deflection handle 18 once to sequentially complete the clamping of the pedal body 3 and the feeding of the grinding head 34, significantly simplifying the operation and improving processing efficiency. Simultaneously, during the grinding process, the axial movement of the grinding head 34 can be achieved through fine-tuning of the deflection handle 18, further improving the grinding quality. This device has a compact structure, is easy to operate, and has high practical value and promising prospects for widespread application.

[0045] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the invention can be implemented in other specific forms without departing from the spirit or essential characteristics of the invention. Therefore, the embodiments should be considered in all respects as exemplary and non-limiting, and the scope of the invention is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within the present invention.

Claims

1. A grinding device for the inner hole of a motorcycle brake pedal, comprising a processing table, on which a pedal body is placed, a central protrusion is provided in the middle of the pedal body, and a mounting hole is provided in the center of the central protrusion, characterized in that, It also includes a positioning mechanism, a grinding mechanism, a clamping mechanism, and a clamping drive mechanism. The positioning mechanism and the clamping mechanism are respectively arranged on opposite sides of the processing table to cooperate in fixing the pedal body. The positioning mechanism includes two symmetrically arranged positioning guides fixedly connected to the side of the processing table. The two positioning guides extend outward in opposite directions from the side of the processing table. The vertical distance between the positioning guides and the surface of the processing table is greater than the thickness of the pedal body and less than the height between the mounting hole and the surface of the processing table. The minimum spacing between the two positioning guides is greater than the width of the central protrusion. A grinding mechanism is provided on the side of the processing table and is used to grind the mounting holes; A clamping drive mechanism is used to drive the clamping mechanism and the grinding mechanism to move synchronously toward the pedal body.

2. A device for grinding the inner hole of a brake pedal of a motorcycle according to claim 1, characterized in that, The clamping mechanism includes a transverse clamping frame slidably connected to the processing table, and the grinding mechanism includes a transverse seat slidably connected to the side of the processing table. The moving direction of the transverse seat is perpendicular to the moving direction of the transverse clamping frame. A spindle is rotatably connected to the side of the transverse seat near the pedal body, and a grinding head that mates with the mounting hole is connected to the end of the spindle.

3. A device for grinding the inner hole of a brake pedal of a motorcycle according to claim 2, characterized in that, The clamping drive mechanism includes a shaped lifting cam and a transverse cam rotatably connected to the processing table. The contour side of the shaped lifting cam abuts against the transverse clamping frame. A transverse beam is fixedly connected to the bottom of the transverse seat. The transverse beam abuts against the contour side of the transverse cam. The clamping drive mechanism also includes a synchronous rotation component for driving the shaped lifting cam and the transverse cam to rotate synchronously.

4. A device for grinding the inner hole of a brake pedal of a motorcycle according to claim 3, characterized in that, The synchronous rotation assembly includes a driven gear that is coaxially and fixedly connected to the irregular lifting cam. The end of the transverse beam is provided with a rack that is slidably connected to the processing table. The rack is meshed with the driven gear. A fixed plate is fixedly provided in the middle of the processing table. A return spring is provided between the fixed plate and the transverse beam. The return spring is used to drive the transverse beam to move in a direction away from the center of the processing table.

5. A device for polishing the inner hole of a brake pedal of a motorcycle according to claim 3, characterized in that, The profile of the irregular lifting cam consists of a first arc surface, a variable diameter arc surface, a second arc surface, and a transition arc surface connected end to end. The radius of the first arc surface is smaller than the radius of the second arc surface. The variable diameter arc surface is an arc structure with a gradually increasing radius. When the irregular lifting cam rotates to push the transverse clamping frame to move toward the positioning mechanism, the first arc surface, the variable diameter arc surface, and the second arc surface contact the transverse clamping frame in sequence.

6. A device for polishing the inner hole of a brake pedal of a motorcycle according to claim 3, characterized in that, Two sliding rods are slidably passed through the transverse clamping frame. A clamping plate that abuts against the side of the pedal body is fixedly connected to one end of the sliding rod near the positioning mechanism. A clamping spring is provided between the clamping plate and the transverse clamping frame. The clamping spring is sleeved on the sliding rod. A stop protrusion for restricting the movement of the pedal body along its length direction is provided at one end of the clamping plate near the grinding mechanism.

7. A device for polishing the inner hole of a brake pedal of a motorcycle according to claim 1, characterized in that, Side positioning blocks that are fixedly connected to the processing table are provided on both sides of the positioning guide strip. The side of the side positioning block near the positioning guide strip is inclined toward the side of the processing table. A middle positioning block that is fixedly connected to the processing table is provided between the two positioning guide strips. The middle positioning block has an L-shaped structure and is used to assist in positioning the middle part of the pedal body.

8. A device for polishing the inner hole of a brake pedal of a motorcycle as claimed in claim 1, wherein, The processing table is inclined towards the ground on the side where the clamping mechanism is located, and the bottom of the processing table is provided with bottom support legs for supporting the processing table.

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