A device for grinding the inner arc surface of a brake pad

Abstract

The application discloses a kind of automobile brake lining inner arc surface polishing device, it is related to automobile brake polishing device field, including device main body and polishing roller, device main body is equipped with mounting bracket, and slidingly installed with movable frame in mounting bracket, for driving brake shoe reciprocating sliding cooperation polishing roller realizes inner arc surface polishing.The application is by piston structure cooperation buckling plate and support block reverse clamping structure, rely on blocking plate to buckling plate position reversal, can quickly form two-way stable location to brake lining, replace artificial handheld fixed operation mode, effectively avoid the security risk generated by manual operation, clamping structure linkage is strong, and positioning stability is good, mounting bracket and movable frame are driven by gear and rack and are driven to cooperate sliding guide structure, can drive the workpiece after clamping along arc trajectory reciprocating sliding, guarantee the uniformity of lining inner arc surface processing and product quality, overall need not artificial repeatedly feeding and manual polishing operation, greatly reduce artificial labor intensity.

Description

Technical Field

[0001] This invention relates to the field of automotive brake grinding devices, specifically an automotive brake pad inner arc surface grinding device. In the mass production and processing of brake pads, it is necessary to grind the burrs and excess blanks on the inner arc surface of the pad to ensure the dimensional accuracy and surface flatness of the arc surface, so as to meet the subsequent assembly and fitting requirements and braking use standards.

[0002] The brake pad inner arc surface grinding device is mainly used to complete the finishing and grinding of the inner arc surface of the brake pad. It is a commonly used special processing equipment in the production and processing of friction parts. It can uniformly modify the inner surface of the arc pad, eliminate surface defects caused by forming and processing, and ensure that the workpiece has uniform shape and specifications. In actual production scenarios, it mostly relies on manual hand-held workpiece for alignment and grinding.

[0003] Existing conventional grinding equipment for the inner arc surface of brake pads lacks a dedicated mechanical clamping structure, making it impossible to stably limit and fix the arc-shaped brake pads during operation. Manual hand operation is not only labor-intensive but also prone to mechanical collisions, scratches, and other safety accidents. In addition, the stability of manually holding the workpiece is poor, and the workpiece is prone to shaking and displacement during grinding, resulting in uneven grinding thickness and incomplete grinding of the inner arc surface, which seriously affects the workpiece processing accuracy and finished product yield. Therefore, a grinding device for the inner arc surface of automotive brake pads is proposed. Background Technology

[0004] As a core component of the vehicle braking system, automotive brake pads are directly related to the vehicle's braking safety and are widely used in the manufacturing of various passenger and commercial vehicles. Summary of the Invention

[0005] Therefore, the purpose of this invention is to provide a grinding device for the inner arc surface of automotive brake pads to solve the aforementioned technical problems.

[0006] To achieve the above objectives, the present invention provides the following technical solution: a grinding device for the inner arc surface of an automotive brake pad, comprising a device body and a grinding roller, wherein the device body is provided with a mounting frame, and a movable frame is slidably mounted in the mounting frame, for driving the brake pad to reciprocate and slide in conjunction with the grinding roller to achieve grinding of the inner arc surface;

[0007] A positioning block is provided in the middle of the movable frame, and a piston chamber is opened in the positioning block. Three sets of piston rods are slidably installed on the top of the piston chamber. A support is provided on the top of the piston rod in the middle, and support blocks are hinged to the top of the piston rods on both sides. Buckles are rotatably installed at both ends of the support, which are used to lock and fix the brake shoes when the support moves down with the piston rod. A connecting frame is fixedly installed on the outer wall of the movable frame, and a baffle plate is fixedly installed on the top of the connecting frame. A cylinder is fixedly connected to the bottom of the piston rod in the middle, and the cylinder drives the piston rod to move up and down, which drives the buckle plate to move down and flips under the action of the baffle plate to lock the brake shoes. The piston rods on both sides drive the support blocks to move up synchronously, which supports the brake shoes.

[0008] By adopting the above technical solution, multiple sets of piston rods are driven by the cylinder in conjunction with the piston chamber to achieve synchronous reverse movement of the buckle plate and the support block. With the limiting effect of the baffle plate, the buckle plate is automatically flipped and snapped, which can quickly complete the bidirectional stable clamping and positioning of the brake shoe, effectively improving the safety of operation. At the same time, the reciprocating sliding of the movable frame drives the workpiece to move at a uniform speed, which can be precisely matched with the grinding roller to complete the comprehensive and uniform grinding.

[0009] Furthermore, a control box is fixedly installed on the main body of the device for controlling the operation of each component of the device, and a clearance groove corresponding to the mounting frame is provided on the worktable of the main body of the device for providing clearance space for the sliding of the movable frame.

[0010] By adopting the above technical solutions, centralized and unified control of all operating components of the equipment can be achieved, making operation and adjustment convenient and flexible, which is conducive to standardizing the grinding process. The clearance groove opened on the worktable effectively eliminates the structural interference hazards during the reciprocating sliding process.

[0011] Furthermore, the mounting frame has a support groove on its inner side that corresponds to the bottom of the movable frame, and the movable frame is slidably mounted on the upper end of the support groove. Limiting rods are fixedly installed on both sides of the mounting frame, and limiting grooves corresponding to the limiting rods are opened on both sides of the movable frame. One end of the limiting rod is slidably mounted in the limiting groove to limit the sliding trajectory of the movable frame and prevent it from slipping off.

[0012] By adopting the above technical solution, the combination of support groove with limiting rod and limiting groove can constrain and position the movable frame from the bottom and side at the same time, effectively ensuring the stability of the movable frame during the sliding process and preventing sliding deviation, jamming and slippage.

[0013] Furthermore, a motor is fixedly installed on one side of the mounting frame, and a gear is rotatably installed on the inner wall of the mounting frame. The gear is fixedly installed on the output end of the motor, and a rack that meshes with the gear is fixedly installed on the bottom of one side of the movable frame. The motor drives the gear to rotate, which is used to drive the movable frame to slide back and forth along the support groove through the meshing of the gear and the rack.

[0014] By adopting the above technical solution, the gear and rack meshing transmission mode controls the reciprocating sliding stroke and sliding speed of the movable frame, effectively ensuring the uniformity of the grinding operation on the inner arc surface of the brake shoe.

[0015] Furthermore, multiple sets of rollers are rotatably installed on the inner wall of the support groove on the side of the mounting frame away from the motor, and a wheel groove corresponding to the rollers is opened on the bottom of the other side of the movable frame. The rollers roll and cooperate in the wheel groove to reduce the friction between the movable frame and the support groove and improve the smoothness of the sliding of the movable frame.

[0016] By adopting the above technical solution, the rollers and wheel grooves cooperate to effectively reduce the frictional resistance when the movable frame slides, and reduce problems such as jamming and wear between the movable frame and the support groove.

[0017] Furthermore, the movable frame and the positioning block are fixedly connected by a connecting frame to achieve synchronous movement between the positioning block and the movable frame.

[0018] By adopting the above technical solution, the connecting frame securely connects the movable frame and the positioning block, ensuring that the movement of the two is synchronized and avoiding relative displacement and loosening during operation.

[0019] Furthermore, a fixing bracket is fixedly installed at the bottom of the connecting frame, and the cylinder is fixedly installed at the bottom of the positioning block through the fixing bracket to ensure the stability of the cylinder driving the piston rod to move.

[0020] By adopting the above technical solution, the fixing bracket locks and fixes the cylinder, strengthening the cylinder installation firmness and effectively avoiding the vibration and displacement problems generated during cylinder operation.

[0021] Furthermore, the extended end of the cylinder is slidably mounted on the bottom of the positioning block. When the cylinder extends or retracts, its extended end drives the piston rod located in the middle to slide up and down along the piston cavity, providing power for the movement of the piston rod.

[0022] By adopting the above technical solution, the cylinder extension end and the positioning block are slidably matched, which can stably drive the piston rod to complete the reciprocating movement.

[0023] Furthermore, the piston chamber has an E-shaped structure, and the piston rod in the middle is longer than the piston rods on both sides. When the piston rod in the middle moves downward, it can smoothly push the piston rods on both sides to slide upward along the piston chamber, realizing the synchronous reverse movement of the three sets of piston rods.

[0024] By adopting the above technical solution, the E-shaped piston chamber, combined with the staggered piston rod layout, can achieve the reverse linkage motion of the piston rod without the need to add multiple sets of drive components.

[0025] Furthermore, the barrier plate is provided in two sets, each corresponding to one of the two sets of buckles. When the buckle moves down with the support, the barrier plate abuts against the buckle and pushes it to a state perpendicular to the support, so as to hold the lowest point of the brake shoe through the buckle.

[0026] By adopting the above technical solution, the symmetrically arranged barrier plates and buckle plates cooperate to complete the automatic flipping and shaping of the buckle plates by mechanical contact, without the need for additional drive components to assist in adjusting the posture, and quickly complete the low-position buckling limit of the brake pads.

[0027] In summary, the present invention has the following main beneficial effects:

[0028] This invention utilizes a piston structure combined with a reverse clamping structure of a buckle plate and a support block. By relying on a barrier plate to limit and rotate the buckle plate, it can quickly achieve bidirectional stable positioning of the brake liner, replacing the traditional manual hand-held fixing method. This effectively avoids the safety hazards caused by manual operation. The clamping structure has strong linkage and good positioning stability, preventing workpiece displacement or loosening during grinding. The mounting frame and movable frame are driven by a gear and rack with a sliding guide structure, which can drive the clamped workpiece to slide back and forth along an arc trajectory, ensuring the uniformity of the inner arc surface processing of the liner and the quality of the finished product. The entire process eliminates the need for repeated manual loading and unloading and manual grinding operations, significantly reducing labor intensity. Simultaneously, the cooperation of the avoidance structure and the support and fixing structure ensures smooth and stable equipment operation. Attached Figure Description

[0029] Figure 1 This is a three-dimensional structural diagram of the entire invention;

[0030] Figure 2 This is a three-dimensional structural diagram of the clamping mechanism of the present invention;

[0031] Figure 3 This is a cross-sectional structural diagram of the mounting bracket of the present invention;

[0032] Figure 4 This is a three-dimensional structural diagram of the mounting bracket of the present invention from another angle;

[0033] Figure 5 This is a three-dimensional structural schematic diagram of some parts of the present invention;

[0034] Figure 6 This is a three-dimensional structural diagram of the movable frame of the present invention after being cut apart;

[0035] Figure 7 This is a three-dimensional structural diagram of the positioning block of the present invention;

[0036] Figure 8 This is a schematic diagram of the cross-sectional structure for quick positioning according to the present invention.

[0037] In the diagram: 1. Main body of the device; 101. Clearance groove; 102. Control box; 11. Mounting frame; 111. Support groove; 112. Roller; 12. Limiting rod; 13. Motor; 131. Gear; 14. Movable frame; 141. Limiting groove; 142. Rack; 143. Wheel groove; 15. Connecting frame; 151. Fixing frame; 152. Barrier plate; 16. Positioning block; 161. Piston chamber; 162. Piston rod; 163. Support block; 164. Support; 165. Buckle plate; 17. Cylinder; 2. Brake shoe; 3. Grinding roller. Detailed Implementation

[0038] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and should not be construed as limiting the present invention.

[0039] The embodiments of the present invention will now be described.

[0040] A grinding device for the inner arc surface of automotive brake pads, such as Figure 1-8 As shown, the device includes a main body 1 and a grinding roller 3. The main body 1 is provided with a mounting frame 11, and a movable frame 14 is slidably installed in the mounting frame 11. The movable frame 14 can maintain a stable sliding state by relying on the guide structure, and is used to drive the brake shoe 2 to slide back and forth in conjunction with the grinding roller 3 to achieve grinding of the inner arc surface.

[0041] A positioning block 16 is provided in the middle of the movable frame 14, and a piston chamber 161 is opened in the positioning block 16. The piston chamber 161 provides a sealed sliding space for the synchronous linkage movement of multiple sets of piston rods 162. Three sets of piston rods 162 are slidably installed on the top of the piston chamber 161, and a support 164 is provided on the top of the piston rod 162 located in the middle. Support blocks 163 are hinged to the top of the piston rods 162 located on both sides. Buckles 165 are rotatably installed at both ends of the support 164, which are used to lock and fix the brake shoes 2 when the support 164 moves down with the piston rods 162. The outer wall of the movable frame 14 A connecting frame 15 is fixedly installed, and a barrier plate 152 is fixedly installed on the top of the connecting frame 15. The barrier plate 152 can form a rigid limit constraint during the downward movement of the buckle plate 165. A cylinder 17 is fixedly connected to the bottom of the piston rod 162 located in the middle, and the cylinder 17 drives the piston rod 162 to move up and down, which is used to drive the buckle plate 165 to move down and flip under the action of the barrier plate 152 to buckle the brake shoe 2. The piston rods 162 on both sides drive the support blocks 163 to move up synchronously, which is used to support the brake shoe 2. The arc-shaped structure of the brake shoe 2 is stably wrapped by the reverse clamping cooperation method.

[0042] Please see Figure 1-8A control box 102 is fixedly installed on the main body 1 of the device for controlling the operation of each component of the device. It can centrally regulate and output commands for the overall operating parameters of the device. A clearance groove 101 corresponding to the mounting frame 11 is provided on the workbench of the main body 1 of the device to provide clearance space for the sliding of the movable frame 14, thereby avoiding structural interference problems and adapting to the travel range of the movable frame 14.

[0043] Please see Figure 1-8 The mounting frame 11 has a support groove 111 on its inner side that corresponds to the bottom of the movable frame 14. The groove structure supports the movable frame 14, and the movable frame 14 is slidably mounted on the upper end of the support groove 111. Limiting rods 12 are fixedly installed on both sides of the mounting frame 11. The symmetrically arranged rods on both sides form a lateral constraint structure. Limiting grooves 141 corresponding to the limiting rods 12 are opened on both sides of the movable frame 14. One end of the limiting rod 12 is slidably mounted in the limiting groove 141 to limit the sliding trajectory of the movable frame 14 and prevent it from slipping. Real-time correction during the movement is achieved through sliding cooperation.

[0044] Please see Figure 1-8 A motor 13 is fixedly installed on one side of the mounting frame 11. The motor 13 can output stable rotational power to provide power for the reciprocating grinding of the workpiece. A gear 131 is rotatably installed on the inner wall of the mounting frame 11. The gear 131 is fixedly installed at the output end of the motor 13. The gear 131 can rotate synchronously with the output end to achieve stable power transmission. A rack 142 is fixedly installed on the bottom side of the movable frame 14 and meshes with the gear 131. The motor 13 drives the gear 131 to rotate, which drives the movable frame 14 to slide back and forth along the support groove 111 through the meshing of the gear 131 and the rack 142. Relying on the meshing transmission of the gear 131 and the rack 142, the rotational motion of the gear 131 is converted into the reciprocating sliding of the rack 142 and the movable frame 14 in an arc-shaped trajectory with the center of the movable frame 14 as the axis.

[0045] Please see Figure 1-8 Multiple sets of rollers 112 are rotatably mounted on the inner wall of the support groove 111 on the side of the mounting frame 11 away from the motor 13. The multiple sets of rollers 112 are evenly spaced to form a multi-point rolling support structure. On the other side of the bottom of the movable frame 14, there is a wheel groove 143 corresponding to the rollers 112. The wheel groove 143 is adapted to the contour of the rollers 112 and can limit the rollers 112 to avoid rolling deviation. The openings at both ends of the wheel groove 143 are designed with bevels to guide the rollers 112 when the movable frame 14 slides. The rollers 112 roll and cooperate in the wheel groove 143 to reduce the friction between the movable frame 14 and the support groove 111, improve the smoothness of sliding of the movable frame 14, and convert the sliding friction between the movable frame 14 and the support groove 111 into rolling friction, which greatly reduces the frictional resistance.

[0046] Please see Figure 1-8 The movable frame 14 and the positioning block 16 are fixedly connected by a connecting frame 15. The connecting frame 15 wraps around the outside of the positioning block 16 and forms a stable connection structure to achieve synchronous movement between the positioning block 16 and the movable frame 14.

[0047] Please see Figure 1-8 A fixed bracket 151 is fixedly installed at the bottom of the connecting frame 15. The fixed bracket 151 forms an integrated load-bearing structure, providing a mounting base for the cylinder 17, ensuring that it is not offset by the movement of the movable frame 14, and avoiding shaking. The cylinder 17 is fixedly installed at the bottom of the positioning block 16 through the fixed bracket 151 to ensure the stability of the cylinder 17 when driving the piston rod 162.

[0048] Please see Figure 1-8 The extended end of the cylinder 17 is slidably mounted on the bottom of the positioning block 16 to ensure flexible and smooth extension and retraction. When the cylinder 17 extends and retracts, its extended end drives the piston rod 162 located in the middle to slide up and down along the piston chamber 161, accurately transmitting power in a linear drive manner to achieve directional displacement of the piston rod 162 and provide power for the movement of the piston rod 162.

[0049] Please see Figure 1-8 The piston chamber 161 has an E-shaped structure, which can reasonably divide the independent movement area and meet the arrangement requirements of multiple sets of piston rods 162. The piston rod 162 located in the middle is longer than the piston rods 162 located on both sides. The difference in length is used to form a difference in movement stroke. When the piston rod 162 located in the middle moves downward, it can smoothly push the piston rods 162 on both sides to slide upward along the piston chamber 161, realizing the synchronous reverse movement of the three sets of piston rods 162. The force is transmitted by the pressure of the medium in the chamber, forming a linkage effect.

[0050] Please see Figure 1-8 The barrier plate 152 is provided in two sets, which are symmetrically arranged to form a symmetrical limiting constraint structure. Each set corresponds to a buckle plate 165. When the buckle plate 165 moves down with the support 164, the buckle plate 165 remains in a free rotation state, which is convenient for subsequent state adjustment. The barrier plate 152 abuts against the buckle plate 165 and pushes it to a state perpendicular to the support 164. The buckle plate 165 is used to hold the lowest point of the brake shoe 2, and the buckle plate 165 is automatically reversed and flipped by mechanical hard limiting.

[0051] The working principle of this invention is as follows: Before the main body 1 of the device is started, the brake shoe 2 to be ground is placed on the positioning block 16. The lowest point of the brake shoe 2 is installed corresponding to the top of the support 164. Then, the main body 1 of the device is started through the control box 102, and the cylinder 17 is controlled to start working. The extended end of the cylinder 17 drives the piston rod 162 located in the middle to slide down along the piston chamber 161. The piston rod 162 in the middle drives the support 164 at the top to move down at the same time. The buckle plates 165 rotatably installed at both ends of the support 164 move down together with the support 164.

[0052] The fixing bracket 151 is fixedly installed at the bottom of the connecting frame 15. The cylinder 17 is fixedly installed at the bottom of the positioning block 16 through the fixing bracket 151. The fixing bracket 151 provides stable support and limit for the cylinder 17, ensuring that the cylinder 17 will not deviate when driving the piston rod 162, thus ensuring the stability of power transmission.

[0053] When the buckle plate 165 moves down to contact the barrier plate 152 at the top of the connecting frame 15, the barrier plate 152 generates a resisting force on the buckle plate 165, forcing the buckle plate 165, which was originally hanging down naturally, to flip upward around the end of the support 164 until the buckle plate 165 flips to a state perpendicular to the support 164. At this time, the flipped buckle plate 165 latches onto the lowest point of the brake shoe 2, thereby achieving a snap-locking limit on the bottom of the brake shoe 2.

[0054] Since the piston chamber 161 has an E-shaped structure and the length of the middle piston rod 162 is greater than that of the two side piston rods 162, when the middle piston rod 162 slides downward, it will squeeze the medium in the piston chamber 161, thereby pushing the two side piston rods 162 to slide upward synchronously along the piston chamber 161.

[0055] The support blocks 163 hinged to the top of the piston rods 162 on both sides move upward together with the piston rods 162. The support blocks 163 contact the outer wall of the brake pad 2 and rotate adaptively until the support blocks 163 are tightly abutted against the outer walls of both sides of the brake pad 2, generating an upward supporting force on both sides of the brake pad 2. Combined with the snap-fit ​​action of the buckle plate 165 on the bottom of the brake pad 2, a bidirectional stable clamping of the brake pad 2 is formed, ensuring that the brake pad 2 will not shift or loosen during the grinding process.

[0056] After the brake pads 2 are clamped and fixed, the control box 102 controls the motor 13 to start. The output end of the motor 13 drives the gear 131 to rotate. The gear 131 meshes with the rack 142 at the bottom of the movable frame 14, thereby driving the movable frame 14 to slide back and forth along the support groove 111 on the inner side of the mounting frame 11.

[0057] The workbench of the main body 1 is provided with a clearance groove 101 corresponding to the mounting frame 11. The clearance groove 101 provides sufficient clearance space for the reciprocating sliding of the movable frame 14, so as to avoid interference between the movable frame 14 and the workbench of the main body 1 when the movable frame 14 slides, and ensure that the movable frame 14 slides smoothly.

[0058] The limiting rods 12 on both sides of the mounting frame 11 slide in the limiting grooves 141 on both sides of the movable frame 14, limiting the sliding trajectory of the movable frame 14 and preventing it from deviating when sliding. The rollers 112 in the support grooves 111 of the mounting frame 11 roll in the wheel grooves 143 at the bottom of the movable frame 14, reducing the friction when the movable frame 14 slides and ensuring that the movable frame 14 slides smoothly.

[0059] When the movable frame 14 slides back and forth, it will drive the positioning block 16 connected to it via the connecting frame 15 to move synchronously. The positioning block 16 drives the brake shoe 2, which is clamped and fixed, to slide back and forth together. At this time, the grinding roller 3 moves down to a position that is in close contact with the inner arc surface of the brake shoe 2. The grinding roller 3 rotates at high speed, so that the entire inner arc surface of the brake shoe 2 can pass through the grinding area of ​​the grinding roller 3 evenly, thereby achieving uniform grinding of the inner arc surface of the brake shoe 2.

[0060] During the polishing process, the control box 102 controls the operating status of each component in real time. When it is necessary to adjust the polishing force or the sliding speed of the movable frame 14, it can be precisely adjusted through the control box 102.

[0061] After grinding, the control box 102 controls the extended end of the cylinder 17 to rise, the cylinder 17 drives the piston rod 162 in the middle to slide upward, the support 164 and the buckle plate 165 move upward accordingly, and after the buckle plate 165 and the blocking plate 152 are disengaged, they reset under their own gravity, releasing the buckle limit on the bottom of the brake shoe 2.

[0062] At the same time, after the central piston rod 162 moves upward, the piston rods 162 on both sides lose the squeezing force and slide downward under the action of gravity. The support block 163 disengages from the two sides of the brake shoe 2, releasing the support and limiting of the brake shoe 2. At this time, the polished brake shoe 2 can be taken out, completing a single polishing operation.

[0063] Although embodiments of the present invention have been shown and described, these specific embodiments are merely explanations of the invention and are not intended to limit it. The specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. After reading this specification, those skilled in the art may make modifications, substitutions, and variations to the embodiments as needed without departing from the principles and spirit of the invention, but such modifications, substitutions, and variations are protected by patent law as long as they are within the scope of the claims of the present invention.

Claims

1. A grinding device for the inner arc surface of automotive brake pads, comprising a device body (1) and a grinding roller (3), characterized in that: The main body (1) of the device is provided with a mounting frame (11), and a movable frame (14) is slidably installed inside the mounting frame (11) to drive the brake shoe (2) to reciprocate and slide in conjunction with the grinding roller (3) to achieve grinding of the inner arc surface; A positioning block (16) is provided in the middle of the movable frame (14), and a piston chamber (161) is provided in the positioning block (16). Three sets of piston rods (162) are slidably installed on the top of the piston chamber (161). A support (164) is provided on the top of the piston rod (162) in the middle, and a support block (163) is hinged to the top of the piston rods (162) on both sides. Buckles (165) are rotatably installed at both ends of the support (164) for locking the brake shoe (2) when the support (164) moves down with the piston rod (162). The movable frame (14) is fixedly mounted with a connecting frame (15) on its outer wall, and a barrier plate (152) is fixedly mounted on the top of the connecting frame (15). The piston rod (162) located in the middle is fixedly connected to a cylinder (17) at its bottom, and the cylinder (17) drives the piston rod (162) to move up and down, which is used to drive the buckle plate (165) to move down and flip under the action of the barrier plate (152) to buckle the brake shoe (2). The piston rod (162) located on both sides drives the support block (163) to move up synchronously, which is used to support the brake shoe (2).

2. The grinding device for the inner arc surface of an automotive brake pad according to claim 1, characterized in that: A control box (102) is fixedly installed on the main body (1) of the device for controlling the operation of each component of the device. A clearance groove (101) corresponding to the mounting frame (11) is provided on the workbench of the main body (1) of the device for providing clearance space for the sliding of the movable frame (14).

3. The grinding device for the inner arc surface of an automotive brake pad according to claim 1, characterized in that: The mounting frame (11) has a support groove (111) on its inner side that corresponds to the bottom of the movable frame (14), and the movable frame (14) is slidably mounted on the upper end of the support groove (111). Limiting rods (12) are fixedly mounted on both sides of the mounting frame (11), and limiting grooves (141) corresponding to the limiting rods (12) are opened on both sides of the movable frame (14). One end of the limiting rod (12) is slidably mounted in the limiting groove (141) to limit the sliding trajectory of the movable frame (14) and prevent it from slipping.

4. The grinding device for the inner arc surface of an automotive brake pad according to claim 3, characterized in that: A motor (13) is fixedly installed on one side of the mounting frame (11), and a gear (131) is rotatably installed on the inner wall of the mounting frame (11). The gear (131) is fixedly installed at the output end of the motor (13), and a rack (142) that meshes with the gear (131) is fixedly installed at the bottom of one side of the movable frame (14). The motor (13) drives the gear (131) to rotate, which is used to drive the movable frame (14) to slide back and forth along the support groove (111) through the meshing of the gear (131) and the rack (142).

5. The grinding device for the inner arc surface of an automotive brake pad according to claim 4, characterized in that: The mounting bracket (11) has multiple sets of rollers (112) rotatably mounted on the inner wall of the support groove (111) on the side away from the motor (13), and the bottom of the other side of the movable frame (14) has a wheel groove (143) corresponding to the rollers (112). The rollers (112) roll and cooperate in the wheel groove (143) to reduce the friction between the movable frame (14) and the support groove (111) and improve the smoothness of sliding of the movable frame (14).

6. The grinding device for the inner arc surface of an automotive brake pad according to claim 1, characterized in that: The movable frame (14) and the positioning block (16) are fixedly connected by a connecting frame (15) to achieve synchronous movement of the positioning block (16) and the movable frame (14).

7. The grinding device for the inner arc surface of an automotive brake pad according to claim 1, characterized in that: The bottom of the connecting frame (15) is fixedly installed with a fixing bracket (151), and the cylinder (17) is fixedly installed on the bottom of the positioning block (16) through the fixing bracket (151) to ensure the stability of the cylinder (17) driving the piston rod (162) to move.

8. The grinding device for the inner arc surface of an automotive brake pad according to claim 1, characterized in that: The extended end of the cylinder (17) is slidably mounted on the bottom of the positioning block (16). When the cylinder (17) extends or retracts, its extended end drives the piston rod (162) located in the middle to slide up and down along the piston chamber (161), providing power for the movement of the piston rod (162).

9. A grinding device for the inner arc surface of an automotive brake pad according to claim 1, characterized in that: The piston chamber (161) has an E-shaped structure, and the piston rod (162) in the middle is longer than the piston rods (162) on both sides. When the piston rod (162) in the middle moves downward, it can smoothly push the piston rods (162) on both sides to slide upward along the piston chamber (161), so as to realize the synchronous reverse movement of the three sets of piston rods (162).

10. A grinding device for the inner arc surface of an automotive brake pad according to claim 1, characterized in that: The barrier plate (152) is provided in two sets, and each set corresponds to a buckle plate (165). When the buckle plate (165) moves down with the support (164), the barrier plate (152) abuts against the buckle plate (165) and pushes it to a state perpendicular to the support (164), so as to hold the lowest point of the brake shoe (2) through the buckle plate (165).

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