An external arc grinder for automobile drum brake pads

Abstract

The utility model discloses an automobile drum brake pad outer arc grinder, which relates to the technical field of brake pad processing, including a workbench and a grinding disc, wherein a grinding disc is arranged above the workbench. The utility model arranges a positioning component and a pull plate, pulls the pull plate outward, puts the drum brake pad into the top surface of a turntable and then releases the pull plate, so that the position of the drum brake pad can be conveniently positioned and fixed, the positioning component can simplify the operation process of disassembling and assembling the drum brake pad, and the positioning effect is good, thereby improving the processing efficiency, the pull plate can conveniently position the front and rear sides of the top surface of the drum brake pad at the same time, and by arranging a lifting component, running a third servo motor to drive the rotating rod and the threaded rod to rotate at the same time, which can drive the threaded sleeve to move upward or downward relative to the workbench at the same time, thereby adjusting the height of the workbench, and the lifting component can simplify the operation process of adjusting the height of the workbench, further improving the processing efficiency.

Description

Technical Field

[0001] The utility model relates to the technical field of brake pad processing, in particular to an automobile drum brake pad outer arc grinding machine. Background Art

[0002] Brake pads are safety parts in the automobile braking system. Brake pads are generally made of steel plates, adhesive insulation layers and friction blocks. Drum brakes use oil pressure to push the brake pads to contact the inner edge of the brake drum when braking. The friction generated by the contact is used to suppress the rotation of the tire to achieve the purpose of braking. When grinding drum brake pads, the outer arc surface needs to be ground into a smooth surface. The position of the drum brake pads needs to be fixed before grinding.

[0003] For example, a vehicle drum brake pad outer arc grinder disclosed in the utility model with authorization announcement number CN216883204U positions the drum brake pad by setting a point-contact anti-skid positioning block, thereby avoiding obstruction of the drum brake pad during the grinding process. The upper surface of the turntable can be protected by setting an anti-skid and pressure-resistant layer to avoid direct contact with the drum brake pad. The horizontal linear movement of the movable support block can be achieved by the electric slider in conjunction with the electric slide rail.

[0004] This prior art also has the following problems when used:

[0005] When the device is used to disassemble and replace drum brake pads, it is necessary to adjust the height and rotation angle of the point contact anti-skid positioning block multiple times, which is cumbersome to operate. When the device is used to adjust the height of the working platform, it is necessary to turn the bolts in turn and adjust the relative positions of the sleeve rod and the moving rod, which is cumbersome to operate. Utility Model Content

[0006] In order to overcome the deficiencies of the prior art, the utility model provides an automobile drum brake pad outer arc grinder to solve the technical problems mentioned in the above background.

[0007] In order to solve the above technical problems, the utility model provides the following technical solutions: an automobile drum brake pad outer arc grinder, comprising a workbench and a grinding disc, wherein a grinding disc is arranged above the workbench;

[0008] The positioning component is arranged on the top surface of the workbench, the top surface of the workbench is provided with an electric slide rail, an electric slider is arranged inside the electric slide rail, a mobile support block is fixedly arranged on the top surface of the electric slider, a first servo motor is fixedly installed on the top surface of the mobile support block, the output end of the first servo motor is fixedly connected to the grinding disc, a controller and a mounting seat are fixedly arranged on the top surface of the workbench, a second servo motor is fixedly installed on the top of the mounting seat, a turntable is fixedly arranged on the top surface of the output end of the second servo motor, and an anti-skid and anti-pressure layer is adhered to the top surface of the turntable. The positioning component includes a U-shaped frame, a point-contact anti-skid positioning block, a first lifting rod, a second lifting rod, a first spring, a lifting plate, a vertical rod, a connecting rod, a pull rod, a second spring, a fixed block, a sliding sleeve and a T-shaped slider. A U-shaped frame is fixedly provided on the top surface of the mounting seat, a symmetrical first spring is fixedly provided on the bottom surface of the transverse part of the U-shaped frame, a first lifting rod is fixedly provided on the other end of the first spring, a point-contact anti-slip positioning block is fixedly provided on the bottom surface of the first lifting rod, a second lifting rod is fixedly provided on the top surface of the first lifting rod, a lifting plate is fixedly provided on the top surface of the second lifting rod, a T-shaped slider is fixedly provided on the side surface of the lifting plate, a connecting rod is hingedly provided on the bottom surface of the lifting plate, a sliding sleeve is hingedly provided on the other end of the connecting rod, a pull rod is slidably connected inside the sliding sleeve, a fixing block is fixedly provided on the outside of the pull rod, a symmetrical vertical rod is fixedly provided on the top surface of the workbench, a second spring is fixedly provided on the side surface of the vertical rod, and the positioning assembly can facilitate the disassembly and installation of the drum brake pad;

[0009] A pull plate, which is arranged above the workbench and can conveniently position the front and rear sides of the top surface of the drum brake pad at the same time;

[0010] Lifting components are arranged on the bottom and top surfaces of the workbench, and the lifting components can conveniently adjust the height of the workbench.

[0011] As a preferred technical solution of the utility model, a plurality of linearly arranged slots are provided on one side of the first lifting rod close to the pull rod, the pull rod is slidably connected to the first lifting rod through the slot, the second lifting rod passes through the U-shaped frame and is slidably connected to the U-shaped frame, the pull rod passes through the vertical rod and is slidably connected to the vertical rod, a connecting block is fixedly provided at one end of the second spring away from the vertical rod, the left and right sides of the connecting block are respectively fixedly connected to the pull plate and the pull rod, the pull rod passes through the sliding sleeve, a T-shaped slide groove adapted to the T-shaped slider is provided on the side of the vertical rod, and the T-shaped slider is slidably connected to the vertical rod through the T-shaped slide groove.

[0012] As an optimal technical solution of the utility model, the lifting assembly includes a rectangular sleeve, a self-locking universal wheel, a third servo motor, a rotating rod, a threaded rod, a rubber belt and a threaded sleeve. A symmetrical third servo motor is fixedly installed on the top surface of the workbench, a rectangular sleeve is arranged below the four corners of the bottom surface of the workbench, a threaded sleeve is slidably connected inside the rectangular sleeve, a self-locking universal wheel is fixedly arranged on the bottom surface of the threaded sleeve, a threaded rod is threadedly connected inside the threaded sleeve, a rotating rod is fixedly arranged on the top surface of the threaded rod, and a rubber belt is transmission-connected to the outside of the rotating rod.

[0013] As an optimal technical solution of the utility model, four fixing rods are fixedly arranged at the four corners of the bottom surface of the workbench, the bottom surface of the fixing rods is fixedly connected to the rectangular sleeve, the output ends of the third servo motor are respectively fixedly connected to the rotating rods at the rear, the rotating rods pass through the workbench, the rotating rods are rotatably connected to the workbench through bearings, and the threaded sleeve passes through the rectangular sleeve.

[0014] Compared with the prior art, the utility model can achieve the following beneficial effects:

[0015] The utility model provides a positioning component and a pull plate, and the pull plate is pulled outward to place the drum brake pad on the top surface of the turntable and then release the pull plate, so that the position of the drum brake pad can be conveniently positioned and fixed. The positioning component can simplify the operation process of disassembling and assembling the drum brake pad, and the positioning effect is good, thereby improving the processing efficiency. The pull plate can conveniently position the front and rear sides of the top surface of the drum brake pad at the same time. By providing a lifting component, the third servo motor is operated to drive the rotating rod and the threaded rod to rotate at the same time, which can drive the threaded sleeve to move upward or downward relative to the workbench at the same time, thereby adjusting the height of the workbench. The lifting component can simplify the operation process of adjusting the height of the workbench, and further improve the processing efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 This is a schematic diagram of the main structure of the utility model;

[0017] Figure 2 This is a schematic diagram of the cross-sectional structure of the main view of the utility model;

[0018] Figure 3 For this utility model Figure 2 A schematic diagram of the partially enlarged structure at center A;

[0019] Figure 4 It is a schematic diagram of the cross-sectional structure of the left side view of the utility model;

[0020] Among them: 1. workbench; 2. grinding disc; 3. mounting seat; 4. turntable; 5. U-shaped frame; 6. point contact anti-skid positioning block; 7. first lifting rod; 8. second lifting rod; 9. first spring; 10. lifting plate; 11. vertical rod; 12. connecting rod; 13. pull rod; 14. second spring; 15. pull plate; 16. fixed block; 17. sliding sleeve; 18. T-shaped slider; 19. rectangular sleeve; 20. self-locking universal wheel; 21. third servo motor; 22. rotating rod; 23. threaded rod; 24. rubber belt; 25. threaded sleeve. DETAILED DESCRIPTION

[0021] In order to make the technical means, creative features, objectives and effects of the present invention easy to understand, the present invention is further described below in conjunction with specific embodiments, but the following embodiments are only preferred embodiments of the present invention, not all. Based on the embodiments in the implementation mode, other embodiments obtained by those skilled in the art without creative work are all within the protection scope of the present invention.

[0022] Example

[0023] Please refer to Figure 1-Figure 4 As shown, the utility model provides an external arc grinder for automobile drum brake pads, comprising a workbench 1 and a grinding disc 2. An electric slide rail is arranged on the top surface of the workbench 1, an electric slider is arranged inside the electric slide rail, a movable support block is fixedly arranged on the top surface of the electric slider, a first servo motor is fixedly installed on the top surface of the movable support block, a grinding disc 2 is fixedly arranged on the output end of the first servo motor, the electric slider cooperates with the electric slide rail to drive the movable support block to slide left and right on the top of the workbench 1, thereby driving the grinding disc 2 to move left and right, a controller and a mounting seat 3 are fixedly arranged on the top surface of the workbench 1, a second servo motor is fixedly installed on the top of the mounting seat 3, a turntable 4 is fixedly arranged on the top surface of the output end of the second servo motor, an anti-skid and anti-pressure layer is adhered to the top surface of the turntable 4, the anti-skid and anti-pressure layer can increase the friction between the turntable 4 and the drum brake pad, and the controller is electrically connected to the first servo motor, the electric slide rail, the electric slider and the second servo motor respectively.

[0024] like Figure 1-Figure 4As shown, a positioning assembly is arranged on the top surface of the workbench 1, and the positioning assembly consists of a U-shaped frame 5, a point contact anti-skid positioning block 6, a first lifting rod 7, a second lifting rod 8, a first spring 9, a lifting plate 10, a vertical rod 11, a connecting rod 12, a pull rod 13, a second spring 14, a fixed block 16, a sliding sleeve 17 and a T-shaped slider 18. The U-shaped frame 5 is fixedly arranged on the top surface of the mounting seat 3, and a symmetrical first spring 9 is fixedly arranged on the bottom surface of the transverse part of the U-shaped frame 5. The other end of the first spring 9 is fixedly arranged with a first lifting rod 7, and the first lifting rod 7 is fixedly arranged on the other end of the first lifting rod 7. The bottom surface of the rod 7 is fixedly provided with a point contact anti-skid positioning block 6, the top surface of the first lifting rod 7 is fixedly provided with a second lifting rod 8, the second lifting rod 8 penetrates the U-shaped frame 5 and is slidably connected to the U-shaped frame 5, the top surface of the second lifting rod 8 is fixedly provided with a lifting plate 10, the side of the lifting plate 10 is fixedly provided with a T-shaped slider 18, the side of the vertical rod 11 is provided with a T-shaped slide groove adapted to the T-shaped slider 18, the T-shaped slider 18 is slidably connected to the vertical rod 11 through the T-shaped slide groove, the bottom surface of the lifting plate 10 is hinged with a connecting rod 12, and the other end of the connecting rod 12 is hinged A sliding sleeve 17 is connected, and a pull rod 13 is slidably connected inside the sliding sleeve 17. The pull rod 13 passes through the sliding sleeve 17. A plurality of linearly arranged slots are arranged on the side of the first lifting rod 7 close to the pull rod 13. The pull rod 13 is slidably connected to the first lifting rod 7 through the slots. A fixing block 16 is fixedly arranged on the outside of the pull rod 13. A symmetrical vertical rod 11 is fixedly arranged on the top surface of the workbench 1. The pull rod 13 passes through the vertical rod 11 and is slidably connected to the vertical rod 11. A second spring 14 is fixedly arranged on the side of the vertical rod 11. The second spring 14 is away from the vertical rod 11. A connecting block is fixedly provided at the end, the right side of the connecting block is fixedly connected to the pull rod 13, and a pull plate 15 is fixedly provided on the left side of the connecting block. The symmetrical pull plates 15 are close to each other, and the pull plates 15 can conveniently position the front and rear sides of the top surface of the drum brake pad at the same time. Pull the pull plates 15 outward, put the drum brake pad into the top surface of the turntable 4 and then release the pull plates 15, which can facilitate the positioning and fixing of the position of the drum brake pad. The positioning component can simplify the operating procedures for disassembly and assembly of the drum brake pad, and the positioning effect is better, thereby improving the processing efficiency.

[0025] Specifically, when it is necessary to disassemble and replace the drum brake pad, or adjust the grinding position of the drum brake pad, the outward pulling movement drives the connecting block and the pull rod 13 to move outward, the second spring 14 is extended, the pull rod 13 moves and drives the outward fixed block 16 to move until the pull rod 13 disengages from the slot, and when the pull rod 13 continues to move outward to make the fixed block 16 contact the sliding sleeve 17, the fixed block 16 pushes the sliding sleeve 17 to move outward, and the movement of the sliding sleeve 17 drives the connecting rod 12 to rotate, and the rotation of the connecting rod 12 drives the lifting plate 10 to move upward, and the T-shaped slider 18 cooperates with the T-shaped slide groove to guide and limit the movement of the lifting plate 10, and the movement of the lifting plate 10 drives the second lifting rod 8, the first lifting rod 7 and the point contact anti-skid positioning block 6 to move outward, the first spring 9 is compressed, and when the distance between the bottom surface of the point contact anti-skid positioning block 6 and the turntable 4 reaches the maximum, the drum brake pad can be taken out for replacement, or the second servo motor can be operated to drive the turntable 4 to rotate, The position of the drum brake pad to be polished is adjusted. After the drum brake pad is replaced or the position to be polished is adjusted, the pull plate 15 is released to allow the second spring 14 to pull the pull rod 13 to move inward. The movement of the pull rod 13 causes the first spring 9 to push the first lifting rod 7 and the point contact anti-skid positioning block 6 to move downward until the bottom of the point contact anti-skid positioning block 6 presses the drum brake pad. At this time, the pull rod 13 is just aligned with the slot in the horizontal direction, and the pull rod 13 continues to move inward until the pull rod 13 is engaged with the inside of the slot. The pull rod 13 cooperates with the first lifting rod 7 to realize the positioning and fixation of the drum brake pad. When the height of the drum brake pad directly below the bottom surface of the symmetrical point contact anti-skid positioning block 6 is the same, the distance moved by the point contact anti-skid positioning block 6 in contact with the drum brake pad is the same. The operator can pull the pull plate 15 outward or release the pull plate 15 with one hand at the same time, thereby positioning the front and rear sides of the top surface of the drum brake pad at the same time, further simplifying the operation process.

[0026] like Figure 1-Figure 4As shown, the bottom and top surfaces of the workbench 1 are provided with lifting components, which are composed of a rectangular sleeve 19, a self-locking universal wheel 20, a third servo motor 21, a rotating rod 22, a threaded rod 23, a rubber belt 24 and a threaded sleeve 25. A symmetrical third servo motor 21 is fixedly installed on the top surface of the workbench 1, and the third servo motor 21 is electrically connected to the controller. A rectangular sleeve 19 is provided below the four corners of the bottom surface of the workbench 1, and the internal cross-section of the rectangular sleeve 19 is rectangular. Fixed rods are fixedly provided at the four corners of the top surface of the rectangular sleeve 19, and the top surface of the fixed rod is fixedly connected to the bottom surface of the workbench 1. A threaded sleeve 25 is slidably connected inside the rectangular sleeve 19, and the threaded sleeve 25 penetrates the rectangular sleeve 19, and the rectangular sleeve 19 guides the movement of the threaded sleeve 25. A self-locking universal wheel 20 is fixedly arranged on the bottom surface of the threaded sleeve 25, a threaded rod 23 is threadedly connected inside the threaded sleeve 25, a rotating rod 22 is fixedly arranged on the top surface of the threaded rod 23, a rubber belt 24 is transmission-connected to the outer side of the rotating rod 22, the rotating rod 22 passes through the workbench 1, and the rotating rod 22 is rotatably connected to the workbench 1 through a bearing, and the output ends of the third servo motor 21 are respectively fixedly connected to the rotating rod 22 at the rear, and the third servo motor 21 is operated to drive the rotating rod 22 and the threaded rod 23 to rotate at the same time, which can drive the threaded sleeve 25 to move upward or downward relative to the workbench 1 at the same time, thereby adjusting the height of the workbench 1, and the lifting assembly can simplify the operation process of adjusting the height of the workbench 1, and further improve the processing efficiency.

[0027] Specifically, when the height of the workbench 1 needs to be adjusted, the controller drives the third servo motor 21 to drive the rear rotating rod 22 and the threaded rod 23 to rotate. The rotation of the rear rotating rod 22 drives the rubber belt 24 to rotate. The rotation of the rubber belt 24 drives the front rotating rod 22 to rotate, thereby driving the front threaded rod 23 to rotate. The rotation of the threaded rod 23 drives the threaded sleeve 25 to move upward or downward simultaneously relative to the workbench 1, thereby adjusting the height of the workbench 1.

[0028] Specific working principle:

[0029] When the device needs to disassemble and replace the drum brake pad, or adjust the grinding position of the drum brake pad, the device pulls outward to move the connecting block and the pull rod 13 outward, the second spring 14 is extended, the pull rod 13 moves to drive the outward fixed block 16 to move until the pull rod 13 is out of the slot, and the pull rod 13 continues to move outward to make the fixed block 16 contact the sliding sleeve 17, the fixed block 16 pushes the sliding sleeve 17 to move outward, the movement of the sliding sleeve 17 drives the connecting rod 12 to rotate, the rotation of the connecting rod 12 drives the lifting plate 10 to move upward, and the T-shaped slider 18 cooperates with the T-shaped slide groove to lift The movement of the plate 10 is guided and limited. The movement of the lifting plate 10 drives the second lifting rod 8, the first lifting rod 7 and the point contact anti-skid positioning block 6 to move outward. The first spring 9 is compressed. When the distance between the bottom surface of the point contact anti-skid positioning block 6 and the turntable 4 reaches the maximum, the drum brake pad can be taken out for replacement, or the second servo motor is driven by the controller to drive the turntable 4 to rotate, and the position of the drum brake pad to be polished is adjusted. After completing the replacement of the drum brake pad or the adjustment of the position to be polished, release the pull plate 15 to allow the second spring 14 to pull the pull rod 13 inward. The pull rod 13 moves, and the first spring 9 pushes the first lifting rod 7 and the point contact anti-skid positioning block 6 to move downward until the bottom of the point contact anti-skid positioning block 6 presses the drum brake pad. At this time, the pull rod 13 is just aligned with the slot in the horizontal direction, and the pull rod 13 continues to move inward until the pull rod 13 is engaged with the inside of the slot. The pull rod 13 cooperates with the first lifting rod 7 to realize the positioning and fixation of the drum brake pad. The positioning component can simplify the operation process of disassembling and assembling the drum brake pad, and the positioning effect is better, thereby improving the processing efficiency. The controller drives the first servo The motor drives the grinding disc 2 to rotate, and the controller then drives the electric slide rail and the electric slider to make the movable support block approach the drum brake pad, thereby driving the grinding disc 2 to approach the drum brake pad to grind the outer arc of the drum brake pad. When the height of the drum brake pad directly below the bottom surface of the symmetrical point-contact anti-skid positioning block 6 is the same, the distance moved by the point-contact anti-skid positioning block 6 in contact with the drum brake pad is the same. The operator can pull the pull plate 15 outward or release the pull plate 15 with one hand at the same time, thereby positioning the front and rear sides of the top surface of the drum brake pad at the same time, further simplifying the operating process.

[0030] When the height of the workbench 1 needs to be adjusted, the controller drives the third servo motor 21 to drive the rear rotating rod 22 and the threaded rod 23 to rotate. The rotation of the rear rotating rod 22 drives the rubber belt 24 to rotate. The rotation of the rubber belt 24 drives the front rotating rod 22 to rotate, thereby driving the front threaded rod 23 to rotate. The rotation of the threaded rod 23 drives the threaded sleeve 25 to move upward or downward relative to the workbench 1 at the same time, thereby adjusting the height of the workbench 1. The lifting assembly can simplify the operating process of adjusting the height of the workbench 1 and further improve the processing efficiency.

[0031] The above shows and describes the basic principle, main features and advantages of the utility model. Those skilled in the art should understand that the utility model is not limited by the above embodiments. The above embodiments and descriptions are only preferred examples of the utility model and are not used to limit the utility model. Without departing from the spirit and scope of the utility model, the utility model may have various changes and improvements, which fall within the scope of the utility model to be protected. The scope of protection of the utility model is defined by the attached claims and their equivalents.

Claims

1. An automobile drum brake pad outer arc grinding machine, comprising a workbench (1) and a grinding disc (2), wherein the grinding disc (2) is arranged above the workbench (1), and characterized in that: A positioning component is arranged on the top surface of a workbench (1), the top surface of the workbench (1) is provided with an electric slide rail, an electric slider is arranged inside the electric slide rail, a movable support block is fixedly arranged on the top surface of the electric slider, a first servo motor is fixedly installed on the top surface of the movable support block, the output end of the first servo motor is fixedly connected to the grinding disc (2), a controller and a mounting seat (3) are fixedly arranged on the top surface of the workbench (1), a second servo motor is fixedly installed on the top of the mounting seat (3), a turntable (4) is fixedly arranged on the top surface of the output end of the second servo motor, and an anti-skid and anti-pressure layer is adhered to the top surface of the turntable (4), the positioning component comprises a U-shaped frame (5), a point contact anti-skid positioning block (6), a first lifting rod (7), a second lifting rod (8), a first spring (9), a lifting plate (10), a vertical rod (11), a connecting rod (12), a pull rod (13), a second spring (14), a fixed block (16), a sliding sleeve (17) and a T-shaped slider (18), the top surface of the mounting seat (3) is fixedly provided with A U-shaped frame (5) is arranged, a symmetrical first spring (9) is fixedly arranged on the bottom surface of the transverse part of the U-shaped frame (5), a first lifting rod (7) is fixedly arranged on the other end of the first spring (9), a point contact anti-slip positioning block (6) is fixedly arranged on the bottom surface of the first lifting rod (7), a second lifting rod (8) is fixedly arranged on the top surface of the first lifting rod (7), a lifting plate (10) is fixedly arranged on the top surface of the second lifting rod (8), and a T-shaped sliding block is fixedly arranged on the side surface of the lifting plate (10) (18), a connecting rod (12) is hingedly connected to the bottom surface of the lifting plate (10), a sliding sleeve (17) is hingedly connected to the other end of the connecting rod (12), a pull rod (13) is slidably connected inside the sliding sleeve (17), a fixing block (16) is fixedly arranged on the outside of the pull rod (13), a symmetrical vertical rod (11) is fixedly arranged on the top surface of the workbench (1), a second spring (14) is fixedly arranged on the side of the vertical rod (11), and the positioning assembly can facilitate the disassembly and installation of the drum brake pad; A pull plate (15), wherein the pull plate (15) is arranged above the workbench (1), and the pull plate (15) can conveniently position the front and rear sides of the top surface of the drum brake pad at the same time; A lifting component is arranged on the bottom surface and the top surface of the workbench (1), and the lifting component can conveniently adjust the height of the workbench (1).

2. The automobile drum brake pad outer arc grinding machine according to claim 1, characterized in that: A plurality of slots arranged linearly are provided on one side of the first lifting rod (7) close to the pull rod (13); the pull rod (13) is slidably connected to the first lifting rod (7) through the slots; the second lifting rod (8) passes through the U-shaped frame (5) and is slidably connected to the U-shaped frame (5); the pull rod (13) passes through the vertical rod (11) and is slidably connected to the vertical rod (11); a connecting block is fixedly provided at one end of the second spring (14) away from the vertical rod (11); the left and right sides of the connecting block are respectively fixedly connected to the pull plate (15) and the pull rod (13); the pull rod (13) passes through the sliding sleeve (17); a T-shaped sliding groove adapted to the T-shaped sliding block (18) is provided on the side of the vertical rod (11); the T-shaped sliding block (18) is slidably connected to the vertical rod (11) through the T-shaped sliding groove.

3. The automobile drum brake pad outer arc grinding machine according to claim 1, characterized in that: The lifting assembly comprises a rectangular sleeve (19), a self-locking universal wheel (20), a third servo motor (21), a rotating rod (22), a threaded rod (23), a rubber belt (24) and a threaded sleeve (25); a symmetrical third servo motor (21) is fixedly installed on the top surface of the workbench (1); a rectangular sleeve (19) is arranged below the four corners of the bottom surface of the workbench (1); a threaded sleeve (25) is slidably connected inside the rectangular sleeve (19); a self-locking universal wheel (20) is fixedly arranged on the bottom surface of the threaded sleeve (25); a threaded rod (23) is threadedly connected inside the threaded sleeve (25); a rotating rod (22) is fixedly arranged on the top surface of the threaded rod (23); and a rubber belt (24) is transmission-connected outside the rotating rod (22).

4. The automobile drum brake pad outer arc grinding machine according to claim 3, characterized in that: Four fixing rods are fixedly arranged at the four corners of the bottom surface of the workbench (1), and the bottom surfaces of the fixing rods are fixedly connected to the rectangular sleeve (19). The output ends of the third servo motor (21) are fixedly connected to the rear rotating rods (22), respectively. The rotating rods (22) pass through the workbench (1), and the rotating rods (22) are rotatably connected to the workbench (1) via bearings. The threaded sleeve (25) passes through the rectangular sleeve (19).

Images