Grinding device for friction plate of automobile brake

Abstract

The invention belongs to the technical field of grinding, and particularly relates to an automobile brake friction plate grinding device which comprises a grinding table, a moving mechanism, a fixing mechanism, a grinding seat and a grinding mechanism, the moving mechanism is arranged on the grinding table, the fixing mechanism is arranged on the moving mechanism, the grinding seat is fixed to one side of the grinding table, and the grinding mechanism is arranged on the grinding table. The grinding mechanism is arranged at the bottom of the grinding seat and comprises a grinding motor, a rotating shaft, a rotating disc, three sleeves and three grinding rollers, the rotating disc is fixed to the bottom of the rotating shaft, the three sleeves are fixed to the bottom of the rotating disc at equal intervals, and the three grinding rollers are fixedly arranged in the three sleeves in a sleeved mode respectively and distributed in a triangular mode. The three grinding rollers are evenly distributed on the rotating disc through the triangular layout, deformation or errors caused by single-point or single-side excessive pressure application are avoided, meanwhile, residual errors of the previous procedure can be gradually eliminated through sequential and alternate grinding, the surface flatness and parallelism of a friction plate are higher, and dimensional tolerance control is more stable.

Description

Technical Field

[0001] This invention relates to the field of grinding, and more particularly to a grinding device for automotive brake friction pads. Background Technology

[0002] In the use of brakes, the friction pads are one of the most important components. The friction pads are powered by two brake calipers and clamp the wheel hub to decelerate. In the current use of friction pads, due to long-term use or different personal driving habits, the thickness of the brake friction pads is uneven, and it is often necessary to grind the friction pads to restore their performance.

[0003] A search revealed Chinese patent application CN110153842A, which discloses a grinding device for automotive brake friction pads. The device includes a main unit, with a vertically mounted side support plate bolted to one side of its top. A horizontally mounted fixed top plate is bolted to the top of the side support plate. A vertically mounted hydraulic cylinder is bolted to the center of the bottom of the fixed top plate. A vertically mounted mounting housing is bolted to the bottom of the hydraulic cylinder, and the mounting housing contains a mounting cavity. A vertically fixed electric motor is fitted onto the inner wall of the bottom of the mounting housing. In this invention, the grinding device features a vertically mounted hydraulic cylinder at its top and a mounting housing at its bottom. The electric motor inside the mounting housing drives a grinding wheel at the bottom to grind the friction pads. Unlike traditional handheld grinding devices, this device offers greater safety during grinding, and the lifting mechanism of the hydraulic cylinder allows for more precise grinding control.

[0004] In existing devices, when grinding friction plates, the arc surface of the friction plate is usually ground by a grinding roller. However, during the grinding process, some debris adheres to the grinding roller. At this time, the debris will act on the friction plate along with the grinding roller, thereby causing wear on the friction plate and affecting the grinding of the grinding roller. Summary of the Invention

[0005] To achieve the above objectives, the present invention adopts the following technical solution: A grinding device for automotive brake friction pads includes a grinding table, a moving mechanism, a fixing mechanism, a grinding seat, and a grinding mechanism. The moving mechanism is mounted on the grinding table, and the fixing mechanism is mounted on the moving mechanism. The grinding seat is fixed to one side of the grinding table, and the grinding mechanism is located at the bottom of the grinding seat. The grinding mechanism includes a grinding motor, a rotating shaft, a turntable, three sleeves, and three grinding rollers. The turntable is fixed to the bottom of the rotating shaft, and the three sleeves are equidistantly fixed to the bottom of the turntable. The three grinding rollers are respectively fixedly fitted inside the three sleeves and arranged in a triangular pattern. A cleaning mechanism is provided on one side of the grinding mechanism. The cleaning mechanism includes a transmission component, a rotating rod, a cleaning roller, and multiple scrapers. The cleaning mechanism is connected to the grinding mechanism through the transmission component. The top of the rotating rod is rotatably connected to the bottom of the grinding seat, and the bottom is connected to the cleaning roller. The multiple scrapers are equidistantly and inclinedly arranged on the outer circumference of the cleaning roller.

[0006] Preferably, the transmission component includes two pulleys and a belt, with the two pulleys respectively fitted onto the rotating shaft and the rotating rod and connected by the belt.

[0007] Preferably, the grinding seat has a cavity inside, the grinding motor is fixed to the bottom of the cavity and its output end is connected to the rotating shaft, and the top of the cavity has multiple heat dissipation vents.

[0008] Preferably, the moving mechanism includes a moving rail, a screw, a screw motor, a moving block, and a support plate. The moving rail is fixed to the grinding table, the screw is rotatably connected to the moving rail, the moving block is slidably connected to the moving rail and threadedly connected to the screw, the screw motor is connected to the screw, and the support plate is fixed to the top of the moving block.

[0009] Preferably, the fixing mechanism includes an electric push rod, a fixed base, a bracket, a hydraulic cylinder, a clamping plate, and a pad. The fixed base is connected to the support plate via the electric push rod. The bracket is fixed on the fixed base. The clamping plate is connected to the bracket via the hydraulic cylinder. The pad is fixed on the fixed base and its position corresponds to the clamping plate. A baffle is fixed to the rear side of the top of the pad.

[0010] Preferably, the top of the pad is welded with multiple pillars, and the distribution shape of the multiple pillars is the same as that of the friction pad.

[0011] Preferably, an air jet mechanism is also provided on one side of the grinding mechanism. The air jet mechanism includes a half gear, a rack, a connecting seat, a slider, a compression pad, and a conduit. The half gear is fixedly sleeved on the rotating shaft. A groove is provided at the bottom of the grinding seat. The slider is slidably connected in the groove and its bottom is connected to the connecting seat. The rack is fixed on one side of the connecting seat and meshes with the half gear. The compression pad is disposed between the slider and the groove. An air storage chamber is provided inside the cleaning roller. The air storage chamber is connected to the rotating rod through a guide hole. The conduit is connected between the guide hole and the compression pad.

[0012] Preferably, a spring is welded between the other side of the slider and the groove.

[0013] Preferably, the gas storage chamber has multiple spray holes on its circumferential inner wall, the multiple spray holes are obliquely distributed and located between two adjacent scrapers, and the extension direction of the spray holes is parallel to the scraper.

[0014] The beneficial effects of this invention are as follows: 1. This invention, through its grinding and cleaning mechanisms, fixes the friction plate to a fixed mechanism during grinding. After fixing, a moving mechanism is activated, which moves the fixed mechanism and the friction plate, bringing the friction plate to one side of the grinding mechanism. The grinding mechanism then rotates, and because the three grinding rollers are triangularly distributed, they alternately grind the arc-shaped surface of the friction plate, facilitating grinding. During this process, while the three grinding rollers are grinding the friction plate, a transmission mechanism drives a rotating rod to rotate a cleaning roller, which in turn cleans the surfaces of the three grinding rollers with a scraper. The cleaned rollers then continue grinding the friction plate. The triangular layout ensures the three grinding rollers are evenly distributed on the turntable, resulting in more balanced force during each grinding cycle and preventing deformation or errors caused by excessive pressure on a single point or side. Simultaneously, the alternating grinding process... By gradually eliminating residual errors from the previous process, the surface flatness and parallelism of the friction pads are improved, and dimensional tolerance control is more stable. Alternating grinding avoids heat concentration caused by continuous operation of a single grinding roller, reducing burns, cracks, or metallographic changes on the workpiece surface caused by overheating. Furthermore, the alternating operation of the three grinding rollers reduces the wear of each roller, extending the overall tool life. The triangular layout allows for access to the friction pads from multiple directions, making it particularly suitable for friction pads with curved or asymmetrical structures, ensuring contour accuracy. In addition, the rotation of the scraper is tangential to the rotation of the grinding rollers, effectively handling the debris adhering to the grinding rollers. Secondly, the inclined scraper setting allows the shearing force generated by the inclined scraping to guide the scraped material in one axial direction on the surface of the cleaning roller, allowing it to be smoothly discharged. This prevents some debris from adhering to the grinding rollers during the grinding process, causing the debris to act on the friction pads along with the grinding rollers, thus causing wear on the friction pads and affecting the grinding of the grinding rollers. 2. This invention, through its grinding mechanism, cleaning mechanism, and air jet mechanism, allows for the grinding of the friction plate via the grinding mechanism. During this grinding process, the half-gear rotates with the rotating shaft, meshing with the rack. This meshing causes the rack to drive the connecting seat and slider to rotate. As the slider moves, it compresses the compression pad. The compressed gas inside the compression pad is then transported through a conduit to the air storage chamber and ejected through multiple nozzles. These nozzles are angled and act on the cleaning roller, parallel to the scraper. Therefore, the gas ejected from the nozzles diffuses and acts on the surface of the scraper, removing debris adhering to it. Simultaneously, the ejected gas acts on the grinding roller, cooling it and improving the grinding effect on the friction plate. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the structure of a grinding device for automobile brake friction pads proposed in this invention; Figure 2 This is a schematic diagram of the main structure of a grinding device for automobile brake friction pads proposed in this invention; Figure 3 This is a schematic diagram of the moving mechanism and the fixing mechanism of an automotive brake friction pad grinding device proposed in this invention; Figure 4 This is a schematic diagram of the fixing mechanism structure of an automotive brake friction pad grinding device proposed in this invention; Figure 5 This is a partial cross-sectional view of a grinding device for automobile brake friction pads proposed in this invention. Figure 6 This is a schematic diagram of the grinding mechanism and cleaning mechanism of an automotive brake friction pad grinding device proposed in this invention; Figure 7 This is a schematic diagram of the jet mechanism structure of an automotive brake friction pad grinding device proposed in this invention.

[0016] In the attached diagram: 1. Grinding table; 2. Moving mechanism; 3. Fixing mechanism; 4. Grinding mechanism; 5. Grinding seat; 6. Heat dissipation vent; 7. Moving rail; 8. Screw; 9. Screw motor; 10. Moving block; 11. Support plate; 12. Fixing seat; 13. Bracket; 14. Hydraulic cylinder; 15. Clamping plate; 16. Pad plate; 17. Support column; 18. Baffle; 19. Chamber; 20. Cleaning mechanism; 21. Air jet mechanism; 22. Grinding motor; 23. Rotating shaft; 24. Turntable; 25. Sleeve; 26. Grinding roller; 27. Pulley; 28. Rotating rod; 29. ​​Belt; 30. Cleaning roller; 31. Scraper; 32. Half gear; 33. Rack; 34. Connecting seat; 35. Slider; 36. Spring; 37. Compression pad; 38. Guide tube; 39. Spray nozzle. Detailed Implementation

[0017] Example 1, referring to Figures 1-6 A grinding device for automotive brake friction pads includes a grinding table 1, a moving mechanism 2, a fixing mechanism 3, a grinding seat 5, and a grinding mechanism 4. The moving mechanism 2 is mounted on the grinding table 1, and the fixing mechanism 3 is mounted on the moving mechanism 2, enabling the reciprocating movement of the fixing mechanism 3. The grinding seat 5 is bolted to one side of the top of the grinding table 1. The grinding mechanism 4 is located at the bottom of the grinding seat 5 and includes a grinding motor 22, a rotating shaft 23, a turntable 24, and three sleeves 25. The grinding mechanism 4 is equipped with three grinding rollers 26 that fit into the sleeve 25. The turntable 24 is welded to the bottom of the rotating shaft 23. The three sleeves 25 are fixed to the bottom outer wall of the turntable 24 by bolts at equal intervals. The three grinding rollers 26 are fixedly sleeved inside the sleeves 25 and are arranged in a triangle. The grinding seat 5 has a cavity 19 inside. The grinding motor 22 is fixed to the bottom of the cavity 19 by bolts, and its output end is fixedly connected to the rotating shaft 23. A cleaning mechanism 20 is provided on one side of the grinding mechanism 4. The cleaning mechanism 20 includes a transmission component, a rotating rod 28, a cleaning roller 30, and multiple scrapers 31. The cleaning mechanism 20 and the grinding mechanism 4 are connected by the transmission component. The top of the rotating rod 28 is rotatably connected to the bottom of the grinding seat 5 by a bearing. The bottom of the rotating rod 28 is fixedly connected to the cleaning roller 30 by a screw. Multiple scrapers 31 are welded at equal intervals to the outer circumference of the cleaning roller 30. The scrapers 31 are inclined.

[0018] The friction plate is fixed to the fixing mechanism 3. After fixing, the moving mechanism 2 is started. The moving mechanism 2 will drive the fixing mechanism 3 and the friction plate to move, thereby moving the friction plate to one side of the grinding mechanism 4. At this time, the grinding mechanism 4 is started and will rotate. Since the three grinding rollers 26 are arranged in a triangle, the three grinding rollers 26 will take turns acting on the arc surface of the friction plate, which facilitates the grinding of the friction plate. During this process, while the three grinding rollers 26 are grinding the friction plate in turn, the rotating rod 28 is driven by the transmission component to drive the cleaning roller 30 to rotate, thereby cleaning the surface of the three grinding rollers 26 in turn by the scraper 31. After cleaning, the grinding rollers 26 will continue to grind the friction plate. The triangular layout allows the three grinding rollers 26 to rotate on the turntable 2. The uniform distribution of the three grinding rollers ensures a more balanced force during each grinding cycle, preventing deformation or errors caused by excessive pressure on a single point or side. Sequential grinding gradually eliminates residual errors from previous processes, resulting in higher surface flatness and parallelism of the friction pads and more stable dimensional tolerance control. Alternating grinding avoids heat concentration caused by continuous operation of a single grinding roller 26, reducing burns, cracks, or metallographic changes on the workpiece surface due to overheating. Furthermore, the alternating operation of the three grinding rollers 26 reduces wear on each roller, extending the overall tool life. The triangular layout allows for access to the friction pad from multiple directions, making it particularly suitable for friction pads with curved or asymmetrical structures, ensuring contour accuracy. Additionally, the rotation of the scraper 31 is tangential to the rotation of the grinding rollers 26, effectively removing debris adhering to the grinding rollers 26.

[0019] Based on the above, the transmission component consists of two pulleys 27 and a belt 29. The two pulleys 27 and the belt 29 are rotatably connected. The two pulleys 27 are respectively sleeved on the rotating shaft 23 and the rotating rod 28. When the rotating shaft 23 rotates, it will drive one of the pulleys 27 to rotate synchronously. Thus, the cleaning roller 30 is rotated through the cooperation between the two pulleys 27 and the belt 29. Under the action of the transmission component, the cleaning roller 30 rotates in the same direction as the turntable 24. At this time, the scraper 31 will be tangential to the grinding roller 30 when rotating. The shearing force generated by the inclined scraping will guide the scraped material to an axial direction on the roller surface of the cleaning roller 30, so that it can be discharged smoothly. This avoids some debris adhering to the grinding roller 26 during the grinding process, which would cause the debris to act on the friction plate along with the grinding roller 26, thereby causing wear on the friction plate.

[0020] In this invention, the grinding motor 22 generates heat when it is working, and the heat will fill the inside of the chamber 19 and damage the grinding motor 22. Therefore, in order to protect the grinding motor 22, a plurality of heat dissipation vents 6 are provided on the top of the chamber 19 to allow the heat to be discharged from the inside of the chamber 19.

[0021] In this invention, the moving mechanism 2 includes a moving rail 7, a screw 8, a screw motor 9, a moving block 10, and a support plate 11. The moving rail 7 is fixed to the grinding table 1 by bolts. The screw 8 is rotatably connected to both sides of the moving rail 7 by bearings. The moving block 10 is slidably connected inside the moving rail 7. One side of the moving block 10 has a threaded opening adapted to the screw 8, and the screw 8 is threadedly connected to the threaded opening. One side of the moving rail 7 is bolted to the screw motor 9, and one end of the screw motor 9 is fixedly connected to the screw 8. The support plate 11 is bolted to the top of the moving block 10. When grinding the friction plate, the screw motor 9 is started, and the screw motor 9 drives the screw 8 to rotate, so that the moving block 10 drives the fixing mechanism 3 to reciprocate under the guidance of the moving rail 7, thereby realizing the grinding process of the friction plate.

[0022] In this invention, the fixing mechanism 3 includes an electric push rod, a fixed base 12, a bracket 13, a hydraulic cylinder 14, a clamping plate 15, and a pad 16. The fixed base 12 and the support plate 11 are connected by the electric push rod. The bracket 13 is fixed to the fixed base 12 by bolts. The clamping plate 15 is connected to the bracket 13 by the hydraulic cylinder 14, and the clamping plate 15 can move up and down by the hydraulic cylinder 14. The pad 16 is fixed to the fixed base 12 by bolts. The position of the pad 16 corresponds to the position of the clamping plate 15. In order to prevent the friction plate from moving backward during grinding, a baffle 18 is bolted to the rear of the top of the pad 16. The curvature of the baffle 18 is adapted to the curvature of the friction plate.

[0023] Based on the above, in order to effectively dissipate heat from the friction plate during grinding, multiple support pillars 17 are welded to the top of the pad 16. The distribution shape of the support pillars 17 is the same as that of the friction plate. Clamping blocks are provided at corresponding positions on the clamping plate 15 to leave gaps between the friction plate and the pad 16 and the clamping plate 15, so as to facilitate air flow and improve the heat dissipation effect of the friction plate during grinding. At the same time, the multiple support pillars 17 fix the friction plate in point contact, which can make the friction plate have a more stable coefficient of friction and improve the stability of the friction plate during grinding.

[0024] Example 2, refer to Figures 1-7 A grinding device for automobile brake friction pads, compared with Embodiment 1, is provided with an air jet mechanism 21 on one side of the grinding mechanism 4, and the air jet mechanism 21 is connected to the grinding mechanism 4 and the cleaning mechanism 20.

[0025] Based on the above, the jet mechanism 21 includes a half gear 32, a rack 33, a connecting seat 34, a slider 35, a compression pad 27, and a guide tube 38. The half gear 32 is fixedly sleeved on the rotating shaft 23. A groove is provided at the bottom of the fixed seat 12. The slider 35 is slidably connected inside the groove, and its bottom is connected to the connecting seat 34 by bolts. The rack 33 is welded to one side of the connecting seat 34. The half gear 32 meshes with the rack 33 when rotating. The compression pad 27 is disposed between the slider 35 and the groove. An air storage chamber is provided inside the cleaning roller 30. A guide hole is provided through the air storage chamber and the rotating rod 28. The guide tube 38 is disposed between the guide hole and the compression pad 37. A spring 36 is welded between the other side of the slider 35 and the groove. Multiple spray holes 39 are provided on the circumferential inner wall of the air storage chamber. The multiple spray holes 39 are obliquely distributed on the cleaning roller 30. The spray holes 39 are located between two adjacent scrapers 31 and are distributed parallel to the scrapers 31.

[0026] When the friction plate is ground by the grinding mechanism 4, the half gear 32 rotates with the rotation of the shaft 23. When the half gear 32 rotates, it meshes with the rack 33, thereby causing the rack 33 to drive the connecting seat 34 and the slider 35 to rotate. When the slider 35 moves, it squeezes the compression pad 37. At this time, the gas inside the compression pad 37 is compressed and then transported to the interior of the air storage chamber through the conduit 38 and sprayed out through multiple nozzles 39. The nozzles 39 act on the cleaning roller 30 at an angle and are parallel to the position of the scraper 31. Therefore, the gas sprayed from the nozzles 39 acts on the surface of the scraper 31 when it diffuses, thereby treating the debris adhering to the scraper 31. At the same time, the sprayed gas acts on the grinding roller 26, thereby using the sprayed airflow to cool the grinding roller 26.

[0027] The above description is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.

Claims

1. A grinding device for automotive brake friction pads, comprising a grinding table (1), a moving mechanism (2), a fixing mechanism (3), a grinding seat (5), and a grinding mechanism (4), wherein the moving mechanism (2) is disposed on the grinding table (1), the fixing mechanism (3) is disposed on the moving mechanism (2), the grinding seat (5) is fixed to one side of the grinding table (1), and the grinding mechanism (4) is disposed at the bottom of the grinding seat (5), characterized in that, The grinding mechanism (4) includes a grinding motor (22), a rotating shaft (23), a turntable (24), three sleeves (25) and three grinding rollers (26). The turntable (24) is fixed at the bottom of the rotating shaft (23). The three sleeves (25) are fixed at equal distances at the bottom of the turntable (24). The three grinding rollers (26) are respectively fixedly fitted inside the three sleeves (25) and are distributed in a triangular pattern. A cleaning mechanism (20) is provided on one side of the grinding mechanism (4). The cleaning mechanism (20) includes a transmission component, a rotating rod (28), a cleaning roller (30) and multiple scrapers (31). The cleaning mechanism (20) is connected to the grinding mechanism (4) through the transmission component. The top of the rotating rod (28) is rotatably connected to the bottom of the grinding seat (5), and the bottom is connected to the cleaning roller (30). The multiple scrapers (31) are equidistant and inclinedly arranged on the outer circumference of the cleaning roller (30).

2. The grinding device for automobile brake friction pads according to claim 1, characterized in that, The transmission component includes two pulleys (27) and a belt (29). The two pulleys (27) are respectively sleeved on the rotating shaft (23) and the rotating rod (28) and connected by the belt (29).

3. The grinding device for automotive brake friction pads according to claim 1, characterized in that, The grinding seat (5) has a cavity (19) inside. The grinding motor (22) is fixed at the bottom of the cavity (19) and its output end is connected to the rotating shaft (23). The top of the cavity (19) has multiple heat dissipation vents (6).

4. The grinding device for automotive brake friction pads according to claim 1, characterized in that, The moving mechanism (2) includes a moving rail (7), a screw (8), a screw motor (9), a moving block (10), and a support plate (11). The moving rail (7) is fixed on the grinding table (1). The screw (8) is rotatably connected to the moving rail (7). The moving block (10) is slidably connected to the moving rail (7) and threadedly connected to the screw (8). The screw motor (9) is connected to the screw (8). The support plate (11) is fixed to the top of the moving block (10).

5. The grinding device for automobile brake friction pads according to claim 4, characterized in that, The fixing mechanism (3) includes an electric push rod, a fixing seat (12), a bracket (13), a hydraulic cylinder (14), a clamping plate (15), and a pad (16). The fixing seat (12) is connected to the support plate (11) through the electric push rod. The bracket (13) is fixed on the fixing seat (12). The clamping plate (15) is connected to the bracket (13) through the hydraulic cylinder (14). The pad (16) is fixed on the fixing seat (12) and its position corresponds to that of the clamping plate (15). A baffle (18) is fixed on the rear side of the top of the pad (16).

6. The grinding device for automobile brake friction pads according to claim 5, characterized in that, The top of the pad (16) is welded with multiple pillars (17), and the distribution shape of the multiple pillars (17) is the same as that of the friction pad.

7. The grinding device for automobile brake friction pads according to claim 1, characterized in that, The grinding mechanism (4) is also provided with an air jet mechanism (21) on one side. The air jet mechanism (21) includes a half gear (32), a rack (33), a connecting seat (34), a slider (35), a compression pad (37), and a conduit (38). The half gear (32) is fixedly sleeved on the rotating shaft (23). The bottom of the grinding seat (5) is provided with a sliding groove. The slider (35) is slidably connected in the sliding groove and its bottom is connected to the connecting seat (34). The rack (33) is fixed on one side of the connecting seat (34) and meshes with the half gear (32). The compression pad (37) is provided between the slider (35) and the sliding groove. The cleaning roller (30) is provided with an air storage chamber. The air storage chamber is connected to the rotating rod (28) through a guide hole. The conduit (38) is connected between the guide hole and the compression pad (37).

8. The grinding device for automobile brake friction pads according to claim 7, characterized in that, A spring (36) is welded between the other side of the slider (35) and the groove.

9. The grinding device for automobile brake friction pads according to claim 7, characterized in that, The gas storage chamber has multiple spray holes (39) on its inner circumference. The multiple spray holes (39) are obliquely distributed and located between two adjacent scrapers (31). The extension direction of the spray holes (39) is parallel to that of the scrapers (31).

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