Double-sided polishing and finishing process for brake disc of electric vehicle

Abstract

The invention relates to the technical field of brake disc grinding, and discloses an electric vehicle brake disc double-face grinding and finishing process which comprises the following steps that S1, firstly, a driving source drives a moving table to be away from a double-face grinding assembly and a fixed table, so that a brake pad is fixedly mounted on a mounting shaft conveniently; then, the brake pad can be polished and trimmed and abrasive dust is cleaned through the polishing and trimming device; s2, an output source drives a mounting shaft to rotate at a high speed, so that the brake pad is driven to rotate, and at the moment, double faces of the brake pad are polished and trimmed through a double-face polishing assembly; the moving frame moves in the radial direction to cover the full grinding face of the brake pad, the recursion assembly is used for compressing the wiping cotton to supplement water at the contact end in real time so as to clean fine abrasive dust, it is ensured that in the whole wiping process that the wiping cotton moves from outside to inside, the contact end is always kept in a wet state, and it is fundamentally avoided that water on the contact surface becomes dry.

Description

Technical Field

[0001] This invention relates to the field of brake disc polishing technology, specifically to a double-sided polishing and finishing process for electric vehicle brake discs. Background Technology

[0002] Double-sided grinding and finishing of electric vehicle brake discs is a key process to ensure the performance of the braking system. It is used to remove defects such as rust and scratches from the disc body, restore the flatness of the end face and the coefficient of friction, and avoid safety hazards such as abnormal brake noise and uneven wear. After grinding, the end face must be cleaned first, and then a smoothness test is carried out. The thoroughness of the cleaning directly determines the accuracy of the test, which in turn affects whether the brake disc meets the standards.

[0003] In the cleaning process, if grinding debris and sandpaper residue remain, it can cause the roughness tester stylus to jam and the test curve to be distorted, making it impossible to accurately judge the surface quality. The current mainstream cleaning method has obvious defects: because during cleaning, the wet scraping cotton needs to be attached to the end face of the brake disc driven by the machine tool to rotate, and the scraping cotton is moved radially from the outside to the inside along the rotating surface. The cotton body absorbs water and removes impurities through friction. However, as the scraping cotton moves inward, the water content will gradually decrease. On the one hand, when cleaning the outside, the cotton body absorbs a large amount of residual water and debris from grinding and cooling, which quickly consumes the water content. On the other hand, when moving to the inner area of ​​the rotating surface, the cotton body becomes dry and hard due to lack of water. It cannot effectively absorb the debris on the inside and may also shed fibers due to friction, causing secondary pollution to the precision rotating surface. Based on this, the present invention purposefully provides a double-sided grinding and finishing process for electric vehicle brake discs that can adapt to the processing characteristics of the rotating surface of the brake disc and improve the uniformity of cleaning the rotating surface. Summary of the Invention

[0004] The purpose of this invention is to address the shortcomings of existing technologies by providing a double-sided grinding and finishing process for electric vehicle brake discs, thereby solving the technical problems in the prior art.

[0005] The objective of this invention can be achieved through the following technical solutions: A double-sided grinding and finishing process for electric vehicle brake discs includes the following steps: S1: First, the moving stage is driven away from the double-sided grinding components and the fixed stage by the drive source, so that the brake pads can be fixedly installed on the mounting shaft. Then, the brake pads can be ground and cleaned by the grinding and dressing device. S2: The output source drives the mounting shaft to rotate at high speed, thereby driving the brake pad to rotate. At this time, the double-sided grinding component grinds and finishes both sides of the brake pad. S3: The grinding debris produced after grinding adheres to the surface of the brake pads. At this time, water is delivered to the two wiping cotton pads through the water spray assembly, so that the wiping cotton pads are fully saturated with water. S4: The two extrusion discs are brought closer together by the reciprocating assembly, so that the two wiping cotton pads come into contact with the brake pads. At this initial state, the two wiping cotton pads come into contact with the edges of both sides of the brake pads. S5: The mounting shaft drives the brake pads to rotate at a low and uniform speed, allowing the wiping cotton to clean away the wear debris; S6: The drive assembly drives the moving frame to gradually approach the brake pad axis along the radial direction of the brake pad, while the push assembly drives the two extrusion discs to gradually compress the wiping cotton, thereby repeatedly squeezing out the water from the wiping cotton away from the brake pad. S7: Subsequently, when the moving frame is reset, the wipes with the water squeezed out can be used to wipe and clean both sides of the brake pads a second time.

[0006] A double-sided grinding and finishing process for electric vehicle brake discs is characterized in that: the grinding and finishing device includes a base, a double-sided grinding component, and a fixed platform; a movable platform is slidably mounted on the base; the movable platform is driven to move by a built-in drive source in the base; an mounting shaft is rotatably mounted on the movable platform; the mounting shaft is driven to rotate by a built-in output source in the movable platform; the mounting shaft is used to fix and mount brake pads; the brake pads are coaxially arranged with the mounting shaft; the double-sided grinding component and the fixed platform are both fixedly mounted on the base, and the double-sided grinding component and the fixed platform are arranged on opposite sides of the mounting shaft; the double-sided grinding component is used to grind the brake pads. A movable frame is slidably mounted on a fixed platform and driven by a drive assembly on the fixed platform to move along the radial direction of the brake pad. A fixed frame is fixedly mounted on the movable frame, and two symmetrically arranged extrusion discs are slidably mounted on one end of the fixed frame. The brake pad is located between the two extrusion discs. A wiping cotton is fixedly mounted on the side of each extrusion disc facing the brake pad. The extrusion discs are driven to move by a push assembly, which drives the two extrusion discs to move towards each other. A water spraying assembly is provided on the fixed platform, which delivers water to the wiping cotton. When the drive assembly drives the movable frame to gradually approach the brake pad axis, the push assembly pushes the extrusion discs closer to the brake pad, thereby compressing the wiping cotton.

[0007] As a further embodiment of the present invention: the water spraying assembly includes a water outlet pipe, a water supply pipe and a connecting frame. The connecting frame is fixedly installed on a fixed platform, the water outlet pipe is fixedly installed at one end of the connecting frame, the water outlet of the water outlet pipe faces the wiping cotton, and the water inlet of the water outlet pipe is connected to an external water storage tank through the water supply pipe.

[0008] As a further embodiment of the present invention: the driving assembly includes a second screw and a power component, a sliding groove is provided on the fixed platform, the bottom end of the movable frame is slidably installed in the sliding groove, the second screw is rotatably installed in the sliding groove, the second screw is threadedly connected to the movable frame, the power component is fixedly installed on the fixed platform, and the power component drives the second screw to rotate.

[0009] As a further embodiment of the present invention: the recursive assembly includes a sliding frame, a first spring, a roller, a sliding plate, and a connecting assembly. Each of the extrusion discs passes through the fixed frame. The sliding frame is fixedly connected to the end of the extrusion disc away from the wiping cotton, and the sliding frame is connected to the fixed frame through the first spring. The preload of the first spring causes the sliding frame to move away from the fixed frame. The roller is rotatably mounted on the sliding frame. Support frames are fixedly mounted on both sides of the fixed platform. A slider is slidably mounted on each support frame. The slider has an inclined side. The inclined side slides in cooperation with the roller. The distance between the end of the inclined side near the fixed frame and the axis of the brake pad is less than the distance between the end of the inclined side away from the fixed frame and the axis of the brake pad. A through hole is provided at the end of the fixed frame away from the brake pad. The slide plate is slidably installed in the through hole. The slide plate is driven to move by a drive component fixedly installed on the fixed frame. Both ends of the slide plate are connected to connecting rods through connecting components. The connecting rods are fixedly connected to the slide plate.

[0010] As a further embodiment of the present invention: the connecting component includes a protrusion and a second spring, the connecting rod is arranged through the slide plate, and one end of the connecting rod is connected to the slide plate through the second spring. The protrusion is fixedly installed on the connecting rod, and the protrusion and the second spring are distributed on opposite sides of the slide plate. The preload of the second spring causes the protrusion to abut against the slide plate.

[0011] As a further embodiment of the present invention: the push assembly further includes a push plate, a first screw, a fixed box, a linkage gear, and a rack plate. The movable frame has a through groove, the push plate is slidably installed in the through groove, and both ends of the push plate abut against the end of the connecting rod away from the slider. The first screw is rotatably installed in the through groove and is threadedly connected to the push plate. The fixed box is fixedly installed in the movable frame. The linkage gear is rotatably installed on one side of the movable frame. The rack plate is set on one side of the fixed platform, and the linkage gear meshes with the rack plate. A sector gear and a transmission gear are rotatably installed on one side of the fixed box. The sector gear meshes with the transmission gear. A bevel gear assembly is provided in the fixed box. The transmission gear is driven by the first screw through the bevel gear assembly. The linkage gear is driven by the sector gear through a ratchet assembly. When the movable frame moves so that the wiping cotton is close to the brake pad axis, the linkage gear rotates on the rack plate. At this time, the linkage gear drives the sector gear to rotate synchronously.

[0012] As a further aspect of the present invention: the rack plate is slidably mounted on a fixed platform, and a telescopic component is fixedly mounted on the fixed platform, the telescopic component being used to drive the rack plate to reciprocate.

[0013] The beneficial effects of this invention are: 1. In this invention, a pusher assembly drives a pressing disc to bring a wiping cotton against the brake pad. Combined with the mounting shaft driving the brake pad to rotate at low speed, the initial abrasive cleaning is completed. Then, the moving frame moves radially to cover the entire polished surface of the brake pad. The pusher assembly compresses the wiping cotton to replenish the moisture at the contact end in real time to clean fine abrasive. This ensures that the contact end of the wiping cotton remains moist throughout the entire wiping process from the outside to the inside, preventing the contact surface from drying out. Finally, when the moving frame resets, the wiping cotton, which has been squeezed dry, is used to achieve drying and secondary cleaning.

[0014] 2. In this invention, as the moving frame approaches the brake pad axis, the first screw is driven to rotate intermittently by the linkage gear and the sector gear through the transmission gear. This causes the pusher plate to push the extrusion plate to gradually squeeze the wiping cotton. The characteristic of the sector gear causes the transmission gear to rotate intermittently, so the extrusion plate squeezes the water out of the wiping cotton intermittently. This allows for the effect of squeezing out a little water and waiting for the water to be consumed before squeezing again. This avoids the problem of the squeezing speed exceeding the water consumption speed, which would cause the water in the wiping cotton to accumulate into water droplets and fall, resulting in waste and pollution.

[0015] 3. In this invention, the ratchet assembly is designed so that when the moving frame and the wiping cotton reset to dry and clean the brake pads, the rotation of the linkage gear will not drive the sector gear, transmission gear and the first screw to reset. At this time, the wiping cotton is still in a state of being fully compressed by the extrusion plate, which can ensure the pressure of the wiping cotton on the brake pads, thereby improving the wiping and secondary cleaning effect. Attached Figure Description

[0016] The invention will now be further described with reference to the accompanying drawings.

[0017] Figure 1 This is a schematic diagram of the overall structure of the present invention; Figure 2 This is a schematic diagram of the structure of the fixed platform in this invention; Figure 3 In this invention Figure 2 A side view of the structure; Figure 4 This is a schematic diagram of the disassembled mobile frame and fixed platform in this invention; Figure 5 This is a schematic diagram of the through groove in this invention; Figure 6 This is a schematic diagram of the structure of the fixing box in this invention.

[0018] In the diagram: 1. Base; 2. Moving platform; 3. Mounting shaft; 4. Brake pad; 5. Double-sided grinding assembly; 6. Fixed platform; 601. Slide groove; 7. Moving frame; 701. Through groove; 8. Fixed frame; 801. Through hole; 9. Wiping cotton; 10. Water outlet pipe; 11. Water supply pipe; 12. Connecting frame; 13. Extrusion plate; 14. Sliding frame; 15. First spring; 16. Roller; 17. Slider; 18. Bevel; 19. Support frame; 20. Connecting rod; 21. Protrusion; 22. Slide plate; 23. Second spring; 24. Driving component; 25. Push plate; 26. First screw; 27. Fixed box; 28. Linkage gear; 29. ​​Rack plate; 30. Sector gear; 31. Transmission gear; 32. Ratchet assembly; 33. Telescopic component; 34. Second screw; 35. Power component. Detailed Implementation

[0019] 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.

[0020] Please see Figures 1-6 As shown, this invention is a double-sided grinding and finishing process for electric vehicle brake discs, including the following steps: S1: First, the moving stage 2 is driven away from the double-sided grinding assembly 5 and the fixed stage 6 by the drive source, so that the brake pad 4 can be fixedly installed on the mounting shaft 3. Then, the brake pad 4 can be ground and cleaned by the grinding and dressing device. S2: The output source drives the mounting shaft 3 to rotate at high speed, thereby driving the brake pad 4 to rotate. At this time, the double-sided grinding component 5 grinds and finishes both sides of the brake pad 4. S3: The grinding debris produced after grinding adheres to the surface of the brake pad 4. At this time, water is delivered to the two wiping cottons 9 through the water spray assembly, so that the wiping cottons 9 are fully saturated with water. S4: The two extrusion discs 13 are brought closer together by the push assembly, so that the two wiping cottons 9 abut against the brake pad 4. At this time, in the initial state, the two wiping cottons 9 abut against the edges of both sides of the brake pad 4. S5: The mounting shaft 3 drives the brake pad 4 to rotate at a low and uniform speed, allowing the wiping cotton 9 to clean the wear debris; S6: The drive assembly drives the moving frame 7 to gradually approach the axis of the brake pad 4 along the radial direction of the brake pad 4. At the same time, the push assembly drives the two extrusion discs 13 to gradually compress the wiping cotton 9, thereby repeatedly squeezing out the water from the wiping cotton 9 away from the brake pad 4. S7: Subsequently, when the moving frame 7 is reset, the wiping cotton 9, after the water has been squeezed out, can wipe both sides of the brake pad 4 dry and clean them a second time.

[0021] Please see Figures 1-6 As shown, the present invention is a double-sided grinding and finishing process for electric vehicle brake discs, characterized in that: the grinding and finishing device includes a base 1, a double-sided grinding component 5, and a fixed platform 6. A movable platform 2 is slidably mounted on the base 1. The movable platform 2 is driven to move by a built-in drive source in the base 1. An mounting shaft 3 is rotatably mounted on the movable platform 2. The mounting shaft 3 is driven to rotate by a built-in output source in the movable platform 2. The mounting shaft 3 is used to fix and install brake pads 4. The brake pads 4 are coaxially arranged with the mounting shaft 3. The double-sided grinding component 5 and the fixed platform 6 are both fixedly mounted on the base 1, and the double-sided grinding component 5 and the fixed platform 6 are arranged on opposite sides of the mounting shaft 3. The double-sided grinding component 5 is used to grind the brake pads 4. A movable frame 7 is slidably mounted on a fixed platform 6 and is driven by a drive assembly on the fixed platform 6 to move along the radial direction of the brake pad 4. A fixed frame 8 is fixedly mounted on the movable frame 7. Two symmetrically arranged extrusion discs 13 are slidably mounted on one end of the fixed frame 8. The brake pad 4 is located between the two extrusion discs 13. A wiping cotton 9 is fixedly mounted on the side of each extrusion disc 13 facing the brake pad 4. The extrusion discs 13 are driven to move by a push assembly, which drives the two extrusion discs 13 to move towards each other. A water spraying assembly is provided on the fixed platform 6. The water spraying assembly delivers water to the wiping cotton 9. When the drive assembly drives the movable frame 7 to gradually approach the axis of the brake pad 4, the push assembly pushes the extrusion discs 13 closer to the brake pad 4, thereby compressing the wiping cotton 9.

[0022] Specifically, the water spray assembly includes a water outlet pipe 10, a water supply pipe 11, and a connecting frame 12. The connecting frame 12 is fixedly installed on the fixed platform 6. The water outlet pipe 10 is fixedly installed at one end of the connecting frame 12. The water outlet of the water outlet pipe 10 faces the wiping cotton 9. The water inlet of the water outlet pipe 10 is connected to an external water storage tank through the water supply pipe 11.

[0023] Specifically, the drive assembly includes a second screw 34 and a power component 35. The fixed platform 6 has a sliding groove 601. The bottom end of the movable frame 7 is slidably installed in the sliding groove 601. The second screw 34 is rotatably installed in the sliding groove 601 and is threadedly connected to the movable frame 7. The power component 35 is fixedly installed on the fixed platform 6 and drives the second screw 34 to rotate.

[0024] When installing brake pad 4, first drive the moving stage 2 away from the double-sided grinding assembly 5 and the fixed stage 6 using the drive source. Then place the brake pad 4 between the two grinding pads and the two wiping cotton pads 9. Then drive the moving stage 2 to move so that the mounting shaft 3 is inserted into the brake pad 4. Finally, use screws, fastening plates and other components to fix the brake pad 4 onto the mounting shaft 3.

[0025] In one embodiment, the double-sided grinding assembly 5 uses two symmetrically arranged grinding discs to simultaneously grind both sides of the brake pad 4, and the two grinding discs move along the radial direction of the brake pad 4. It should be noted that the double-sided grinding assembly 5 of the present invention includes a support frame, grinding discs, grinding disc mounting bases, linear drive mechanism, drive motor and transmission system, and grinding disc pressure adjustment mechanism, etc. All of the above components are prior art, and the present invention does not improve them. Therefore, it is not necessary to disclose their specific mechanical and circuit structures, and this does not affect the integrity of the present invention. The drive source can be a hydraulic rod, an electric telescopic rod, or other mechanism capable of linear reciprocating motion. The output source and power component 35 can be a servo motor, a servo motor, or other mechanism capable of rotary motion. This embodiment does not impose specific limitations on these components.

[0026] The working principle of this invention is as follows: First, the moving stage 2 is moved away from the double-sided grinding assembly 5 and the fixed stage 6 by the driving source. After the brake pad 4 is installed on the mounting shaft 3, the moving stage 2 is reset. Then, the output source drives the mounting shaft 3 to rotate at high speed. The mounting shaft 3 drives the brake pad 4 to rotate synchronously. The two grinding discs on the double-sided grinding assembly 5 grind the rotating brake pad 4 on both sides synchronously. The grinding discs can move radially along the brake pad 4 to ensure that the brake pad 4 is ground evenly. The abrasive shavings generated during grinding adhere to the surface of the brake pad 4. At this time, the water pump on the water supply pipe 11 starts, the solenoid valve opens, and water is delivered to the wiping cotton 9 through the water supply pipe 11 and the water outlet pipe 10, causing the wiping cotton 9 to absorb water. Then, the push assembly operates to bring the two extrusion discs 13 closer together, causing the wiping cotton 9 to come into contact with the edges of both sides of the brake pad 4. Then, the mounting shaft 3 drives the brake pad 4 to rotate at a low and uniform speed. The wiping cotton 9 rotates with the brake pad 4, using its wetted surface to clean the abrasive shavings. Subsequently, the power component 35 drives the second screw 34 to rotate. The second screw 34 drives the moving frame 7 to move radially towards the axis of the brake pad 4 through the threaded transmission, thereby cleaning the entire grinding surface of the brake pad 4. Considering the movement... As the frame 7 moves radially from the outside to the inside along the brake pad 4 and the wiping cotton 9 wipes the wear debris on the surface of the brake pad 4, the area where the wiping cotton 9 contacts the brake pad 4 will gradually lose its own moisture due to factors such as wear debris adsorption and frictional heat absorption, resulting in a loss of its ability to adsorb fine wear debris. This leaves wear debris residue on the polished surface of the brake pad 4. Therefore, the push assembly drives the two extrusion discs 13 to move closer to the brake pad 4, thereby compressing the wiping cotton 9. This pushes the wiping cotton 9 away from the water in the brake pad 4 and squeezes it into the working wiping area that contacts the brake pad 4, ensuring that the contact end of the wiping cotton 9 remains moist throughout the entire wiping process from the outside to the inside. This prevents the contact surface from drying out and allows for the removal of fine wear debris. Finally, when the movable frame 7 is reset, the wiping cotton 9, after being squeezed dry, can wipe both sides of the brake pad 4 dry and clean them a second time, ensuring that the surface of the brake pad 4 is clean.

[0027] It should be noted that the water supply pipe 11 is equipped with a water pump and a solenoid valve. The power component 35 can be a servo motor, a servo motor or other components that can achieve rotational motion. This embodiment does not impose specific limitations on this.

[0028] like Figures 1-4 As shown, in a preferred embodiment of the present invention, the recursive assembly includes a sliding frame 14, a first spring 15, a roller 16, a sliding plate 22, and a connecting assembly. Each of the extrusion discs 13 passes through the fixed frame 8. The sliding frame 14 is fixedly connected to the end of the extrusion disc 13 away from the wiping cotton 9, and the sliding frame 14 is connected to the fixed frame 8 through the first spring 15. The preload of the first spring 15 causes the sliding frame 14 to move away from the fixed frame 8. The roller 16 is rotatably mounted on the sliding frame 14. Support frames 19 are fixedly mounted on both sides of the fixed platform 6. A slider 17 is slidably mounted on each support frame 19. The slider 17 has a beveled edge 18. The beveled edge 18 is slidably engaged with the roller 16. The distance between the end of the beveled edge 18 near the fixed frame 8 and the axis of the brake pad 4 is less than the distance between the end of the beveled edge 18 away from the fixed frame 8 and the axis of the brake pad 4. A through hole 801 is provided at the end of the fixed frame 8 away from the brake pad 4. The slide plate 22 is slidably installed in the through hole 801. The slide plate 22 is driven to move by a drive component 24 fixedly installed on the fixed frame 8. Both ends of the slide plate 22 are connected to a connecting rod 20 through a connecting component. The connecting rod 20 is fixedly connected to the slider 17.

[0029] Specifically, the connecting assembly includes a protrusion 21 and a second spring 23. The connecting rod 20 is arranged through the slide plate 22, and one end of the connecting rod 20 through the slide plate 22 is connected to the slide plate 22 through the second spring 23. The protrusion 21 is fixedly installed on the connecting rod 20, and the protrusion 21 and the second spring 23 are distributed on opposite sides of the slide plate 22. The preload of the second spring 23 causes the protrusion 21 to abut against the slide plate 22.

[0030] In one embodiment, the driving component 24 may be an electric cylinder, an electric telescopic rod, or other mechanisms capable of linear reciprocating motion. This embodiment does not impose specific limitations on these components.

[0031] In practical application, before cleaning the wear debris on the brake pad 4, the sliding plate 22 is first driven by the drive component 24 to move within the through hole 801. The sliding plate 22 drives the connecting rod 20 to move via the connecting assembly. The connecting rod 20 drives the slider 17 to slide on the support frame 19. When the slider 17 slides, the inclined side 18 slides in cooperation with the roller 16. Since the distance between the end of the inclined side 18 closer to the fixed frame 8 and the axis of the brake pad 4 is smaller, it will push the roller 16 to rotate, thereby causing the sliding frame 14 to overcome the first spring 1. The pre-tightening force approaches the fixed frame 8, causing the extrusion plate 13 and the wiping cotton 9 to approach the brake pad 4. In the connecting assembly, the pre-tightening force of the second spring 23 causes the protrusion 21 to abut against the slide plate 22, ensuring a stable connection between the connecting rod 20 and the slide plate 22. At this time, the drive component 24 pushes the slide plate 22, allowing the slide plate 22 to transmit power to the connecting rod 20, thereby achieving stable transmission. This allows for precise control of the movement of the extrusion plate 13 and the wiping cotton 9, ensuring that the wiping cotton 9 accurately abuts against the brake pad 4, thus providing a guarantee for subsequent cleaning of abrasive debris.

[0032] like Figures 1-6As shown, in a preferred embodiment of the present invention, the push assembly further includes a push plate 25, a first screw 26, a fixing box 27, a linkage gear 28, and a rack plate 29. The movable frame 7 has a through groove 701. The push plate 25 is slidably installed in the through groove 701, and both ends of the push plate 25 abut against the end of the connecting rod 20 away from the slider 17. The first screw 26 is rotatably installed in the through groove 701 and is threadedly connected to the push plate 25. The fixing box 27 is fixedly installed in the movable frame 7. The linkage gear 28 is rotatably installed on one side of the movable frame 7. The rack plate 29... Located on one side of the fixed platform 6, the linkage gear 28 meshes with the rack plate 29. A sector gear 30 and a transmission gear 31 are rotatably mounted on one side of the fixed box 27. The sector gear 30 meshes with the transmission gear 31. A bevel gear assembly is provided inside the fixed box 27. The transmission gear 31 is connected to the first screw 26 through the bevel gear assembly. The linkage gear 28 is connected to the sector gear 30 through the ratchet assembly 32. When the moving frame 7 moves so that the wiping cotton 9 is close to the axis of the brake pad 4, the linkage gear 28 rotates on the rack plate 29. At this time, the linkage gear 28 drives the sector gear 30 to rotate synchronously.

[0033] Specifically, the rack plate 29 is slidably mounted on the fixed platform 6, and a telescopic member 33 is fixedly mounted on the fixed platform 6. The telescopic member 33 is used to drive the rack plate 29 to reciprocate.

[0034] In one embodiment, the telescopic member 33 can be an electric cylinder, an electric telescopic rod, or other mechanisms capable of linear reciprocating motion. This embodiment does not impose specific limitations. The bevel gear assembly of this invention includes a first bevel gear and a second bevel gear. The axes of the first and second bevel gears are perpendicular. The first bevel gear is coaxially and fixedly connected to the transmission gear 31, and the second bevel gear is coaxially and fixedly connected to the first screw 26. The first and second bevel gears mesh. The ratchet assembly 32 includes an internal gear ring, pawls, a rotating shaft, and other components. The internal gear ring is fixedly installed on the inner wall of the linkage gear 28, while multiple pawls are circumferentially arranged on the rotating shaft of the sector gear 30, and the pawls are rotatably connected to the rotating shaft of the sector gear 30. All of the above components are existing technologies, and this invention does not improve them. Therefore, it is not necessary to disclose their specific mechanical and circuit structures, and this does not affect the integrity of this invention.

[0035] In practical application, when the moving frame 7 moves radially towards the axis of the brake pad 4 and the wiping cotton 9 cleans the entire polished surface of the brake pad 4, the movement of the moving frame 7 will drive the linkage gear 28 to move. The rack plate 29 meshes with the linkage gear 28, causing the linkage gear 28 to rotate. The linkage gear 28 drives the sector gear 30 to rotate via the ratchet assembly 32. The sector gear 30 meshes with the transmission gear 31, causing the transmission gear 31 to rotate. The transmission gear 31 drives the first screw 26 to rotate via the bevel gear assembly. The first screw 26 is threadedly connected to the push plate 25. The pusher plate 25 moves within the through groove 701. At this time, the pusher plate 25 pushes the connecting rod 20 to move, causing the second spring 23 to compress. Meanwhile, the slider 17 also moves on the support frame 19. When the slider 17 slides, the inclined side 18 slides with the roller 16. Since the distance between the end of the inclined side 18 near the fixed frame 8 and the axis of the brake pad 4 is smaller, it will push the roller 16 to rotate, thereby causing the sliding frame 14 to overcome the preload of the first spring 15 and approach the fixed frame 8, which in turn drives the extrusion plate 13 and the wiping cotton 9 to approach the brake pad 4, thereby achieving the effect of gradually squeezing out the water from the wiping cotton 9. It is important to note that, such as Figure 6 As shown in the example, as the moving frame 7 drives the wiping cotton 9 to gradually approach the axis of the brake pad 4, the linkage gear 28 and the sector gear 30 rotate continuously. The characteristics of the sector gear 30 determine that the transmission gear 31 rotates intermittently. In this way, the squeezing disc 13 squeezes the water out of the wiping cotton 9 intermittently. This allows for the squeezing of a little water, waiting for the water to be consumed before squeezing again. This avoids the squeezing speed from being greater than the water consumption speed, which would cause the water in the wiping cotton 9 to accumulate into water droplets and fall, resulting in waste and pollution. More importantly, the ratchet assembly 32 ensures that when the moving frame 7 and the wiping cotton 9 reset to dry and clean the brake pad 4, the rotation of the linkage gear 28 will not drive the sector gear 30, the transmission gear 31, and the first screw 26 to reset. At this time, the wiping cotton 9 is still fully compressed by the extrusion plate 13, which can ensure the pressure of the wiping cotton 9 on the brake pad 4, thereby improving the wiping and secondary cleaning effect. After the moving frame 7 resets, the rack plate 29 is extended by the telescopic member 33, which can drive the linkage gear 28 to reset, thereby resetting the push plate 25, the slider 17, the extrusion plate 13, and the wiping cotton 9. Then, the telescopic member 33 drives the rack plate 29 to retract and reset. Due to the action of the ratchet assembly 32, the linkage gear 28 will not drive the sector gear 30 to rotate, thus resetting the entire device to the initial state. The working process of the ratchet assembly 32 is described as follows: Figure 3Taking the example shown, when the movable frame 7 approaches the axis of the brake pad 4, the linkage gear 28 rotates counterclockwise on the rack plate 29. At this time, the pawl and the internal gear of the ratchet assembly 32 are engaged, so the linkage gear 28 drives the sector gear 30 to rotate synchronously through the ratchet assembly 32. When the movable frame 7 is reset, the linkage gear 28 rotates clockwise, so the pawl of the ratchet assembly 32 slides with the internal gear, and the sector gear 30 is stationary. When the telescopic member 33 drives the rack plate 29 to extend, the rack plate 29 causes the linkage gear 28 to rotate counterclockwise, so the linkage gear 28 drives the sector gear 30 to rotate synchronously. When the telescopic member 33 drives the rack plate 29 to retract, the rack plate 29 causes the linkage gear 28 to rotate clockwise, so the sector gear 30 is stationary.

[0036] The foregoing has provided a detailed description of one embodiment of the present invention, but this description is merely a preferred embodiment and should not be construed as limiting the scope of the invention. All equivalent variations and modifications made within the scope of the claims of this invention should still fall within the patent coverage of this invention.

Claims

1. A double-sided grinding and finishing process for electric vehicle brake discs, characterized in that, Includes the following steps: S1: First, drive the moving stage (2) away from the double-sided grinding assembly (5) and the fixed stage (6) by the drive source, so as to conveniently fix the brake pad (4) onto the mounting shaft (3). Then, the brake pad (4) can be ground and cleaned by the grinding and dressing device. S2: Drive the mounting shaft (3) to rotate at high speed through the output source, thereby driving the brake pad (4) to rotate. At this time, the double-sided grinding assembly (5) grinds and trims both sides of the brake pad (4). S3: The grinding debris produced after grinding adheres to the surface of the brake pad (4). At this time, water is delivered to the two wiping cottons (9) through the water spray assembly, so that the wiping cottons (9) are fully saturated with water. S4: By using the push assembly, the two extrusion discs (13) are brought closer to each other, so that the two wiping cotton (9) abut against the brake pad (4). At this time, in the initial state, the two wiping cotton (9) abut against the edges of both sides of the brake pad (4); S5: The mounting shaft (3) drives the brake pad (4) to rotate at a low and uniform speed, allowing the wiping cotton (9) to clean the abrasive. S6: The drive assembly drives the moving frame (7) to gradually approach the axis of the brake pad (4) along the radial direction of the brake pad (4), while the push assembly drives the two extrusion discs (13) to gradually compress the wiping cotton (9), thereby repeatedly squeezing out the water from the wiping cotton (9) away from the brake pad (4). S7: Subsequently, when the moving frame (7) is reset, the wiping cotton (9) with the water squeezed out can also wipe the brake pads (4) dry and clean them a second time.

2. A double-sided grinding and finishing process for electric vehicle brake discs, characterized in that: The grinding and finishing device includes a base (1), a double-sided grinding assembly (5), and a fixed platform (6). A movable platform (2) is slidably mounted on the base (1). The movable platform (2) is driven to move by a drive source built into the base (1). An installation shaft (3) is rotatably mounted on the movable platform (2). The installation shaft (3) is driven to rotate by an output source built into the movable platform (2). The installation shaft (3) is used to fix and install brake pads (4). The brake pads (4) are coaxially arranged with the installation shaft (3). The double-sided grinding assembly (5) and the fixed platform (6) are both fixedly mounted on the base (1), and the double-sided grinding assembly (5) and the fixed platform (6) are arranged on opposite sides of the installation shaft (3). The double-sided grinding assembly (5) is used to grind the brake pads (4). A movable frame (7) is slidably mounted on a fixed platform (6), and the movable frame (7) is driven by a drive assembly on the fixed platform (6) to move along the radial direction of the brake pad (4). A fixed frame (8) is fixedly mounted on the movable frame (7), and two symmetrically arranged extrusion discs (13) are slidably mounted on one end of the fixed frame (8). The brake pad (4) is located between the two extrusion discs (13). A wiping cotton (9) is fixedly mounted on the side of each extrusion disc (13) facing the brake pad (4). The extrusion discs (13) are driven to move by a push assembly. The push assembly drives the two extrusion discs (13) to move towards each other. A water spray assembly is provided on the fixed platform (6). The water spray assembly delivers water to the wiping cotton (9). When the drive assembly drives the movable frame (7) to gradually approach the axis of the brake pad (4), the push assembly pushes the extrusion discs (13) closer to the brake pad (4), thereby compressing the wiping cotton (9).

3. The double-sided grinding and finishing process for electric vehicle brake discs according to claim 1, characterized in that, The water spray assembly includes a water outlet pipe (10), a water supply pipe (11), and a connecting frame (12). The connecting frame (12) is fixedly installed on the fixed platform (6). The water outlet pipe (10) is fixedly installed at one end of the connecting frame (12). The water outlet of the water outlet pipe (10) faces the wiping cotton (9). The water inlet of the water outlet pipe (10) is connected to the external water storage tank through the water supply pipe (11).

4. The double-sided grinding and finishing process for electric vehicle brake discs according to claim 1, characterized in that, The drive assembly includes a second screw (34) and a power component (35). A groove (601) is provided on the fixed platform (6). The bottom end of the movable frame (7) is slidably installed in the groove (601). The second screw (34) is rotatably installed in the groove (601). The second screw (34) is threadedly connected to the movable frame (7). The power component (35) is fixedly installed on the fixed platform (6), and the power component (35) drives the second screw (34) to rotate.

5. The double-sided grinding and finishing process for electric vehicle brake discs according to claim 1, characterized in that, The reciprocating assembly includes a sliding frame (14), a first spring (15), rollers (16), a sliding plate (22), and a connecting assembly. Each of the extrusion discs (13) passes through the fixed frame (8). The sliding frame (14) is fixedly connected to the end of the extrusion disc (13) away from the wiping cotton (9), and the sliding frame (14) is connected to the fixed frame (8) through the first spring (15). The preload of the first spring (15) causes the sliding frame (14) to move away from the fixed frame (8). The rollers (16) 16) Rotatably mounted on the sliding frame (14), the fixed platform (6) is fixedly mounted on both sides of the support frame (19), and each support frame (19) is slidably mounted on a slider (17). The slider (17) has a bevel (18) on it. The bevel (18) is slidably engaged with the roller (16). The distance between the end of the bevel (18) close to the fixed frame (8) and the axis of the brake pad (4) is less than the distance between the end of the bevel (18) away from the fixed frame (8) and the axis of the brake pad (4). A through hole (801) is provided at one end of the fixed frame (8) away from the brake pad (4). The slide plate (22) is slidably installed in the through hole (801). The slide plate (22) is driven to move by a drive component (24) fixedly installed on the fixed frame (8). Both ends of the slide plate (22) are connected to connecting rods (20) through connecting components. The connecting rods (20) are fixedly connected to the slider (17).

6. The double-sided grinding and finishing process for electric vehicle brake discs according to claim 5, characterized in that, The connecting assembly includes a protrusion (21) and a second spring (23). The connecting rod (20) is arranged through the slide plate (22), and one end of the connecting rod (20) through the slide plate (22) is connected to the slide plate (22) through the second spring (23). The protrusion (21) is fixedly installed on the connecting rod (20), and the protrusion (21) and the second spring (23) are distributed on opposite sides of the slide plate (22). The preload of the second spring (23) causes the protrusion (21) to abut against the slide plate (22).

7. The double-sided grinding and finishing process for electric vehicle brake discs according to claim 6, characterized in that, The push assembly further includes a push plate (25), a first screw (26), a fixing box (27), a linkage gear (28), and a rack plate (29). The movable frame (7) has a through groove (701). The push plate (25) is slidably installed in the through groove (701), and both ends of the push plate (25) abut against the end of the connecting rod (20) away from the slider (17). The first screw (26) is rotatably installed in the through groove (701), and the first screw (26) is threadedly connected to the push plate (25). The fixing box (27) is fixedly installed in the movable frame (7). The linkage gear (28) is rotatably installed on one side of the movable frame (7). The rack plate (29) is set on the fixing platform (6). On one side, the linkage gear (28) meshes with the rack plate (29). On one side of the fixed box (27), a sector gear (30) and a transmission gear (31) are rotatably installed. The sector gear (30) meshes with the transmission gear (31). A bevel gear assembly is provided inside the fixed box (27). The transmission gear (31) is connected to the first screw (26) through the bevel gear assembly. The linkage gear (28) is connected to the sector gear (30) through the ratchet assembly (32). When the moving frame (7) moves and the wiping cotton (9) approaches the axis of the brake pad (4), the linkage gear (28) rotates on the rack plate (29). At this time, the linkage gear (28) drives the sector gear (30) to rotate synchronously.

8. The double-sided grinding and finishing process for electric vehicle brake discs according to claim 7, characterized in that, The rack plate (29) is slidably mounted on the fixed platform (6), and a telescopic component (33) is fixedly mounted on the fixed platform (6). The telescopic component (33) is used to drive the rack plate (29) to move back and forth.

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