A brake pad surface sandblasting apparatus

Abstract

The application belongs to the technical field of brake pad processing, and discloses a brake pad surface sand blasting equipment, which comprises a casing, three transmission shafts are rotatably installed between the inner walls on the two sides of the casing, a caterpillar belt is connected to the shaft faces of the three transmission shafts, an end disc for shaping the caterpillar belt into a C shape is rotatably installed on the inner wall of the casing and close to the end portions of the transmission shafts, the opening of the C-shaped caterpillar belt faces the side door of the casing, the end disc is provided with two parts which are symmetrically distributed on the two sides of the casing, a sand blasting assembly for sand blasting treatment of the brake pad on the caterpillar belt is arranged on the casing, a plurality of sand leakage holes are arranged through the caterpillar belt, an outward supporting mechanism for supporting the caterpillar belt in the C shape and outwardly supporting the caterpillar belt is arranged in the casing, and a cleaning assembly for cleaning the sand leakage holes on the supported caterpillar belt is further arranged in the casing. The application is convenient for cleaning the sand leakage holes on the caterpillar belt, and ensures normal recycling of sand and normal sand blasting treatment of the brake pad.

Description

Technical Field

[0001] This invention relates to the field of brake pad processing technology, and in particular to a brake pad surface sandblasting device. Background Technology

[0002] Brake pads are friction material components in the automotive braking system that come into direct contact with the brake disc / brake drum. They achieve vehicle deceleration or stopping through friction. Their core function is to withstand external pressure and generate frictional force, thereby consuming kinetic energy and converting it into heat energy.

[0003] During the production of brake pads, defects such as pores and pinholes may occur on the surface. Sandblasting can effectively remove these surface defects, ensuring the quality and performance of the brake pads. Sandblasting increases the surface roughness of the brake pads, thereby increasing the coefficient of friction with the brake disc. This helps improve braking performance and enhances the adhesion between the coating and the substrate, reducing the risk of coating peeling or detachment. The working principle of a sandblasting machine is to use compressed air to blow quartz sand (or other materials) at high speed through a sandblasting nozzle to clean the surface of the parts.

[0004] Chinese utility model patent CN211992508U discloses a sandblasting device for sandblasting small parts, including a sandblasting box and a sandblasting gun. A rotatable track device is installed inside the sandblasting box, dividing the interior of the sandblasting box into a sandblasting chamber located above the track device and a sand collection chamber located below the track device, with the sandblasting chamber and sand collection chamber connected. The sandblasting gun is positioned above the sandblasting chamber. The device also includes a cyclone dust collector and a sand recovery box. The cyclone dust collector is located on the side of the sandblasting box, and its air inlet is connected to the sandblasting chamber via a pipe. The dust outlet of the cyclone dust collector is connected to one end of the sand recovery box. One end of the sand recovery box is connected to the sand outlet of the sand collection chamber via a pipe. Multiple sand leakage holes are provided on the track device, and these holes are connected to the sand collection chamber.

[0005] Regarding the aforementioned technologies, the inventors believe that the following defects exist: In order to facilitate the recycling of sandblasting materials, multiple sand-draining holes are usually opened on the tracks of the track device. After the sandblasting of the parts on the track device, the sand falls onto the tracks. After passing through the sand-draining holes, the sand falls into the sand collection chamber for recycling. However, the sand-draining holes on the tracks are easily blocked by sand of similar volume. Over time, the sand is difficult to pass through the sand-draining holes and remains on the tracks. This not only hinders the recycling of sand but may also affect the normal sandblasting process of the parts due to the accumulation of a large amount of sand on the tracks. Summary of the Invention

[0006] To address the aforementioned problems, this invention provides a brake pad surface sandblasting device.

[0007] The above-mentioned technical objective of the present invention is achieved through the following technical solution: a brake pad surface sandblasting device, comprising a housing, three drive shafts rotatably mounted between the inner walls on both sides of the housing, a track connected to the shaft surfaces of the three drive shafts, an end plate for shaping the track into a C-shape being rotatably mounted on the inner wall of the housing near the end of the drive shafts, the opening of the C-shaped track facing the side door of the housing, two end plates being provided and symmetrically distributed on both sides of the housing, a sandblasting assembly for sandblasting the brake pads on the track being provided on the housing, a plurality of sand leakage holes being provided through the track, an external support mechanism located inside the C-shaped track and extending the track outward being provided inside the housing, and a cleaning assembly for cleaning the sand leakage holes on the extended track being provided inside the housing.

[0008] By adopting the above technical solution, the external support mechanism can expand the track from the inside out, so that the diameter of the sand leakage hole on the outer side of the track is larger than that on the inner side of the track. At this time, the cleaning component can easily clean the sand leakage hole in the expanded part of the track. Since the track reciprocates under the action of the motor of the sandblasting equipment, it can clean the multiple rows of sand leakage holes on the track, ensuring the normal recycling of sand and reducing the probability that the normal sandblasting process of parts will be affected by the accumulation of a lot of sand on the track.

[0009] Furthermore, the external support mechanism includes an external support assembly, which includes an end plate movably installed within the C-shaped track. The end plate has two end plates symmetrically distributed on both sides of the housing. The external support assembly also includes an external support strip fixed between the two end plates. The side of the external support strip away from the axis of the end plate is a protruding arc-shaped surface. A clearance hole extending toward the axis of the end plate is provided through the arc-shaped surface of the external support strip. The clearance hole corresponds to the position of the sand leakage hole on the track. The external support strip has multiple outer support strips evenly distributed about the axis of the end plate. The external support mechanism also includes a control component for driving the end plate to move toward the side closer to or away from the axis of the end plate so that the arc-shaped surface separates from or abuts against the inner surface of the track.

[0010] By adopting the above technical solution, the control component can drive the end plate to move toward the side closer to or away from the end plate axis, thereby causing the arc-shaped surface of the outer support bar to separate from or abut against the inner surface of the track. When the arc-shaped surface of the outer support bar abuts against the inner surface of the track, the diameter of the sand leakage hole on the outer side of the track is larger than the diameter of the sand leakage hole on the inner side of the track. At this time, the cleaning component can easily clean the sand leakage hole.

[0011] Furthermore, the control assembly includes a transverse U-shaped plate located outside the track and a transverse electric push rod fixed to the outer wall of the housing. The push rod of the transverse electric push rod passes through the housing and is slidably engaged. The end of the push rod of the transverse electric push rod is fixed to the side of the transverse U-shaped plate away from the track. A transverse clearance groove is provided on the inner wall of the housing for the transverse U-shaped plate to move. The track is located between the plates on both sides of the transverse U-shaped plate. The two end plates are rotatably connected to the plates on both sides of the transverse U-shaped plate, respectively.

[0012] By adopting the above technical solution, when the transverse electric push rod is adjusted and the transverse U-shaped plate moves toward the side closer to the inner wall of the machine housing, the end plate moves synchronously with the transverse U-shaped plate, so that the arc-shaped surface of the outer support bar gradually presses against the inner surface of the track, thereby maximizing the diameter of the sand leakage hole on the outer side of the track for cleaning.

[0013] Furthermore, the cleaning assembly is provided in multiple sets arranged in a straight line. The straight-line cleaning assembly is parallel to the axial direction of the drive shaft. Each set of cleaning assemblies corresponds to a sand leakage hole on the same row of the track. The cleaning assembly includes a connecting post fixed to the inner wall of the housing, a sleeve connected to the end of the connecting post away from the inner wall of the housing, a sliding block that slides with the inner wall of the sleeve, a spring fixed to the side of the sliding block near the connecting post, and a cleaning needle fixed to the side of the sliding block away from the connecting post. The end of the spring near the inner wall of the housing abuts against the end of the connecting post. The axis of the cleaning needle coincides with the axis of the clearance hole. The diameter of the end of the cleaning needle away from the connecting post is smaller than the inner diameter of the sand leakage hole and the inner diameter of the clearance hole. A straight through hole is provided through the transverse U-shaped plate at the position corresponding to the multiple sets of cleaning assemblies, allowing the multiple sets of sleeves to pass through.

[0014] By adopting the above technical solution, when the arc-shaped surface of the outer support bar gradually presses against the inner surface of the track, the diameter of the sand leakage hole on the outer side of the track tends to be maximized. During the above process, the sliding block moves towards the axis of the end plate under the action of the spring force, and the cleaning needle gradually passes through the sand leakage hole on the track and enters the clearance hole. The cleaning needle cleans the sand in the sand leakage hole of the track, ensuring the normal recycling of the sand.

[0015] Furthermore, the middle section of the cleaning needle is frustum-shaped, and the diameter of the middle section of the cleaning needle decreases from the sliding block to the outward support bar; two symmetrically arranged limiting blocks are fixed on the side wall of the sliding block, and a limiting groove for sliding engagement of the limiting blocks is provided through the side wall of the sleeve. When the limiting block and the limiting groove are pressed together on the side away from the connecting column, the end of the cleaning needle away from the connecting column is located in the clearance hole.

[0016] By adopting the above technical solution, after the cleaning needle finishes cleaning the sand leakage hole, as the track continues to run, the inner wall of the sand leakage hole on the track gradually abuts against the middle section of the cleaning needle, and the cleaning needle moves with the sliding block toward the side closer to the connecting column. When the next row of sand leakage holes on the track moves to the position corresponding to the cleaning needle, the sliding block is reset under the action of the spring and continues to complete the action of the cleaning needle cleaning the sand leakage hole.

[0017] Furthermore, a central rod is fixed between the two end plates, and a reinforcing rod is fixed to the side wall of the central rod. The end of the reinforcing rod away from the central rod is fixed to the side of the outer support bar near the axis of the end plate. The number of reinforcing rods around the central rod is equal to the number of outer support bars, and their positions correspond one-to-one.

[0018] By adopting the above technical solution, the setting of the center rod and the reinforcing rod ensures the structural strength of the outer support bar, so that the track can be smoothly opened under the action of the outer support bar.

[0019] Furthermore, the top wall of the housing is fixed with multiple monitors for monitoring the cleaning needles. Multiple annular grooves are evenly arranged on the drive shaft near the bottom of the housing. The housing also contains an auxiliary discharge assembly to facilitate the leakage of sand from the bottom of the track. This auxiliary discharge assembly includes a vertical U-shaped plate inside the housing, an auxiliary roller rotatably mounted between two plates on either side of the vertical U-shaped plate and located below the track, and a vertical electric push rod fixed to the bottom of the housing. The push rod of the vertical electric push rod passes through the bottom and is clearance-fitted. The push rod is fixed to the bottom of the vertical U-shaped plate. The track is located between the plates on either side of the vertical U-shaped plate. The inner wall of the housing has a vertical clearance groove for the vertical U-shaped plate to move. The auxiliary roller has a circular cross-section. The diameter of the cross-section circle corresponding to the annular groove on the auxiliary roller is larger than the diameter of the cross-section circle of the auxiliary roller body. Multiple arc-shaped protrusions are evenly arranged on the auxiliary roller corresponding to the annular groove.

[0020] By adopting the above technical solution, the annular groove provides space for sand falling to the bottom of the track, facilitating its leakage through the corresponding sand-draining holes and promoting sand recycling as well as the normal operation of the drive shaft and track. After adjusting the extension of the vertical electric push rod, the vertical U-shaped plate drives the auxiliary roller upwards. When the arc-shaped protrusion on the larger diameter area of ​​the auxiliary roller presses against the track, the track at the annular groove bends inwards, making the diameter of the sand-draining holes on the inner side of the track larger than that on the outer side, thus facilitating sand discharge from the inner side of the track.

[0021] Furthermore, an inclined filter screen is fixed to the inner wall of the housing. The height of the filter screen near the side door of the housing is greater than the height of the filter screen away from the side door of the housing. A return port is provided on the side wall of the housing near the bottom of the filter screen. A return box is fixed to the outer wall of the housing. A feed port is provided on the return box at the position corresponding to the return port. The height of the bottom wall of the return box increases from the middle of the return box to both ends. A return pipe is fixed to and connected to the top of the return box. An auger for recovering the sand in the return box to the sandblasting assembly is provided in the return pipe.

[0022] By adopting the above technical solution, the filter screen screens the falling sand, filtering out some severely worn sand, ensuring the uniformity of the recycled sand particles, which is beneficial to ensuring the uniformity of brake pad processing. The sand that rolls down the filter screen to the return port and the feed port enters the return box, and the auger recovers the sand in the return box into the sandblasting assembly for continued use.

[0023] Furthermore, multiple strip-shaped protrusions are uniformly fixed on the outer surface of the track.

[0024] Furthermore, the housing is also equipped with an adsorption assembly for removing magnetic impurities. The adsorption assembly includes a threaded rod rotatably mounted on the side wall of the housing, a guide rod fixed to the side wall of the housing and parallel to the threaded rod, a movable block jointly disposed on the guide rod and the threaded rod, a magnetic block fixed to the bottom of the movable block, and a drive motor fixed to the side wall of the housing for driving the threaded rod to rotate. The threaded rod passes through the movable block and is threadedly connected, and the guide rod passes through the movable block and is slidably engaged. The threaded rod, guide rod, movable block, and magnetic block are all located inside the track. An outlet is provided on one side of the housing for the movable block and magnetic block to slide out.

[0025] By adopting the above technical solution, after the drive motor works, it drives the threaded rod to rotate. Since the threaded rod is threadedly connected to the movable block and the guide rod is slidably engaged with the movable block, the movable block moves along the axial direction of the threaded rod. The magnetic block moves synchronously with the movable block and attracts the magnetic material (such as magnetic debris generated during the sandblasting process of brake lining) on ​​the inner side of the track. When the movable block moves to the exit, the staff can clean the magnetic debris attached to the magnetic block, which reduces the content of magnetic impurities in the recycled sand and helps to ensure the efficiency and quality of the sandblasting treatment of the brake lining.

[0026] In summary, the present invention has the following beneficial effects: 1. This application facilitates the cleaning of sand leakage holes on the tracks, ensuring the normal recycling of sand and the normal sandblasting treatment of brake linings; 2. In this application, after the cleaning needle finishes cleaning the sand leakage hole, as the track continues to run, the inner wall of the sand leakage hole on the track gradually abuts against the middle section of the cleaning needle, and the cleaning needle moves with the sliding block toward the side closer to the connecting column. When the next row of sand leakage holes on the track moves to the position corresponding to the cleaning needle, the sliding block is reset under the action of the spring and continues to complete the action of the cleaning needle cleaning the sand leakage hole, ensuring the normal recycling of sand by the track. 3. In this application, after the drive motor works, it drives the threaded rod to rotate. Since the threaded rod is threadedly connected to the movable block and the guide rod is slidably engaged with the movable block, the movable block moves along the axial direction of the threaded rod. The magnetic block moves synchronously with the movable block and attracts the magnetic material (such as magnetic debris generated during the sandblasting process of the brake lining) on ​​the inner side of the track. When the movable block moves to the exit, the staff can clean the magnetic debris attached to the magnetic block, which reduces the content of magnetic impurities in the recycled sand and helps to ensure the efficiency and quality of the sandblasting treatment of the brake lining. Attached Figure Description

[0027] Figure 1 This is a schematic diagram of the overall structure of an embodiment of the present invention; Figure 2 yes Figure 1 A structural diagram from another perspective; Figure 3 This is a plan view of an embodiment of the present invention used to highlight the internal structure of the casing; Figure 4 yes Figure 3 Enlarged view of point A in the middle; Figure 5 yes Figure 3 Enlarged view of point B in the middle; Figure 6 This is a cross-sectional structural diagram of an embodiment of the present invention used to highlight the external support mechanism; Figure 7 yes Figure 6 Enlarged view of point C in the middle; Figure 8 This is a perspective view of the drive shaft near the bottom of the housing in an embodiment of the present invention; Figure 9 This is a schematic diagram illustrating the structure of the cleaning component in an embodiment of the present invention; Figure 10 yes Figure 9 Enlarged diagram of point D in the middle.

[0028] In the diagram: 1. Housing; 11. End plate; 12. Side door; 13. Horizontal clearance groove; 14. Monitor; 15. Vertical clearance groove; 16. Filter screen; 17. Return port; 18. Return box; 181. Feed inlet; 19. Return pipe; 191. Screw conveyor; 10. Outlet; 2. Drive shaft; 21. Annular groove; 3. Track; 31. Strip protrusion; 4. Sandblasting assembly; 5. External support mechanism; 51. External support assembly; 511. End plate; 512. External support strip; 5121. Clearance hole; 52. Control assembly; 521. Horizontal... 5211. U-shaped plate; 522. Through hole; 523. Horizontal electric push rod; 6. Cleaning assembly; 61. Connecting column; 62. Sleeve; 621. Limiting groove; 63. Sliding block; 631. Limiting block; 64. Spring; 65. Cleaning needle; 7. Center rod; 71. Reinforcing rod; 8. Auxiliary discharge assembly; 81. Vertical U-shaped plate; 82. Auxiliary roller; 821. Arc-shaped protrusion; 83. Vertical electric push rod; 9. Adsorption assembly; 91. Threaded rod; 92. Guide rod; 93. Movable block; 94. Magnetic block; 95. Drive motor. Detailed Implementation

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

[0030] like Figure 1-10 As shown in the figure, this application discloses a brake pad surface sandblasting device, including a housing 1. Three drive shafts 2 are rotatably installed between the inner walls on both sides of the housing 1. A track 3 is connected to the shaft surface of the three drive shafts 2. An end plate 11 for shaping the track 3 into a C-shape is rotatably installed on the inner wall of the housing 1 near the end of the drive shaft 2. The opening of the C-shaped track 3 faces the side door 12 of the housing 1. There are two end plates 11 symmetrically distributed on both sides of the housing 1. A sandblasting assembly 4 for sandblasting the brake pads on the track 3 is provided on the housing 1. Multiple sand leakage holes (not shown in the figure) are provided through the track 3. An external support mechanism 5 located inside the C-shaped track 3 and expanding the track 3 outward is provided inside the housing 1. A cleaning assembly 6 for cleaning the sand leakage holes on the expanded track 3 is also provided inside the housing 1.

[0031] The external support mechanism 5 can open the track 3 from the inside out, so that the diameter of the sand leakage hole on the outside of the track 3 is larger than that on the inside of the track 3. At this time, the cleaning component 6 can easily clean the sand leakage hole in the opened part of the track 3. Since the track 3 reciprocates under the action of the motor of the sandblasting equipment (in the sandblasting equipment, the motor drives one of the transmission shafts 2 to rotate, and the transmission relationship between the track 3 and the transmission shaft 2 is the prior art, and the motor is not shown in the figure), it can clean the multiple rows of sand leakage holes on the track 3, ensuring the normal recycling of sand and reducing the probability that the normal sandblasting process of the parts will be affected by the accumulation of a lot of sand on the track 3.

[0032] The external support mechanism 5 includes an external support assembly 51, which includes an end plate 511 movably installed in the C-shaped track 3. The end plate 511 has two end plates 511 and is symmetrically distributed on both sides of the housing 1. The external support assembly 51 also includes an external support strip 512 fixed between the two end plates 511. The side of the external support strip 512 away from the axis of the end plate 511 is a convex arc-shaped surface. A clearance hole 5121 extending toward the axis of the end plate 511 is provided through the arc-shaped surface of the external support strip 512. The clearance hole 5121 corresponds to the position of the sand leakage hole on the track 3. The external support strip 512 has multiple end plates 512 and is evenly distributed about the axis of the end plate 511. The external support mechanism 5 also includes a control component 52 for driving the end plate 511 to move toward the side closer to or away from the axis of the end plate 11 so that the arc-shaped surface separates from or abuts against the inner surface of the track 3.

[0033] The control component 52 can drive the end plate 511 to move toward the side closer to or away from the axis of the end plate 11, so that the arc-shaped surface of the outer support bar 512 separates from or abuts against the inner surface of the track 3. When the arc-shaped surface of the outer support bar 512 abuts against the inner surface of the track 3, the diameter of the sand leakage hole on the outer side of the track 3 is larger than the diameter of the sand leakage hole on the inner side of the track 3. At this time, the cleaning component 6 can easily clean the sand leakage hole.

[0034] The control assembly 52 includes a transverse U-shaped plate 521 located outside the track 3 and a transverse electric push rod 522 fixed to the outer wall of the housing 1. The push rod of the transverse electric push rod 522 passes through the housing 1 and is slidably engaged. The push rod end of the transverse electric push rod 522 is fixed to the side of the transverse U-shaped plate 521 away from the track 3. A transverse clearance groove 13 is provided on the inner wall of the housing 1 for the transverse U-shaped plate 521 to move. The track 3 is located between the plates on both sides of the transverse U-shaped plate 521. Two end plates 511 are rotatably connected to the plates on both sides of the transverse U-shaped plate 521, respectively.

[0035] When the transverse electric push rod 522 is adjusted and the transverse U-shaped plate 521 moves toward the side closer to the inner wall of the housing 1, the end plate 511 moves synchronously with the transverse U-shaped plate 521, so that the arc-shaped surface of the outer support bar 512 gradually presses against the inner surface of the track 3, thereby maximizing the diameter of the sand leakage hole on the outer side of the track 3 for cleaning.

[0036] The cleaning assembly 6 is provided in multiple sets arranged in a straight line. The straight-line arrangement of the cleaning assembly 6 is parallel to the axial direction of the drive shaft 2. Each set of cleaning assemblies 6 corresponds to a sand leakage hole on the same row of the track 3. The cleaning assembly 6 includes a connecting post 61 fixed to the inner wall of the housing 1, a sleeve 62 connected to the end of the connecting post 61 away from the inner wall of the housing 1, a sliding block 63 that slides with the inner wall of the sleeve 62, a spring 64 fixed to the side of the sliding block 63 near the connecting post 61, and a cleaning needle 65 fixed to the side of the sliding block 63 away from the connecting post 61. The end of the spring 64 near the inner wall of the housing 1 abuts against the end of the connecting post 61. The axis of the cleaning needle 65 coincides with the axis of the clearance hole 5121. The diameter of the end of the cleaning needle 65 away from the connecting post 61 is smaller than the inner diameter of the sand leakage hole and the inner diameter of the clearance hole 5121. A straight through hole 5211 is provided through the transverse U-shaped plate 521 at the position corresponding to the multiple sets of cleaning assemblies 6 for the multiple sets of sleeves 62 to pass through.

[0037] As the arc-shaped surface of the outer support bar 512 gradually presses against the inner surface of the track 3, the diameter of the sand leakage hole on the outer side of the track 3 tends to be maximized. During the above process, the sliding block 63 moves toward the axis of the end plate 511 under the elastic force of the spring 64, and the cleaning needle 65 gradually passes through the sand leakage hole on the track 3 and enters the clearance hole 5121. The cleaning needle 65 cleans the sand in the sand leakage hole of the track 3, ensuring the normal recycling of the sand.

[0038] The middle section of the cleaning needle 65 is shaped like a frustum, and the diameter of the middle section of the cleaning needle 65 decreases from the sliding block 63 outward to the support bar 512. Two symmetrically arranged limiting blocks 631 are fixed on the side wall of the sliding block 63. The side wall of the sleeve 62 is provided with a limiting groove 621 for sliding engagement of the limiting blocks 631. When the limiting block 631 and the limiting groove 621 are pressed together on the side away from the connecting post 61, the end of the cleaning needle 65 away from the connecting post 61 is located in the relief hole 5121.

[0039] After the cleaning needle 65 finishes cleaning the sand leakage hole, as the track 3 continues to rotate, the inner wall of the sand leakage hole on the track 3 gradually comes into contact with the middle section of the cleaning needle 65, and the cleaning needle 65 moves with the sliding block 63 toward the side closer to the connecting column 61. When the next row of sand leakage holes on the track 3 moves to the position corresponding to the cleaning needle 65, the sliding block 63 is reset under the action of the spring 64 and continues to complete the action of the cleaning needle 65 cleaning the sand leakage hole.

[0040] A central rod 7 is fixed between the two end plates 511. A reinforcing rod 71 is fixed to the side wall of the central rod 7. The end of the reinforcing rod 71 furthest from the central rod 7 is fixed to the side of the outer support strip 512 closest to the axis of the end plate 511. The number of reinforcing rods 71 ​​around the central rod 7 is equal to the number of outer support strips 512, and their positions correspond one-to-one. The arrangement of the central rod 7 and the reinforcing rods 71 ​​ensures the structural strength of the outer support strip 512, allowing the track 3 to be smoothly extended under the action of the outer support strip 512.

[0041] Multiple monitors 14 for monitoring the cleaning needles 65 are fixed on the top wall inside the housing 1. Multiple annular grooves 21 are evenly arranged on the drive shaft 2 near the bottom of the housing 1. An auxiliary discharge assembly 8 for promoting the leakage of sand from the bottom of the track 3 is also provided inside the housing 1. The auxiliary discharge assembly 8 includes a vertical U-shaped plate 81 disposed inside the housing 1, an auxiliary roller 82 rotatably mounted between the plates on both sides of the vertical U-shaped plate 81 and located below the track 3, and a vertical electric push rod 83 fixed to the bottom of the housing 1. The push rod of the push rod 83 passes through the bottom and is clearance-fitted. The push rod of the vertical electric push rod 83 is fixed to the bottom of the vertical U-shaped plate 81. The track 3 is located between the plates on both sides of the vertical U-shaped plate 81. The inner wall of the housing 1 is provided with a vertical clearance groove 15 for the vertical U-shaped plate 81 to move. The cross-section of the auxiliary roller 82 is circular. The diameter of the cross-section circle of the auxiliary roller 82 corresponding to the annular groove 21 is larger than the diameter of the cross-section circle of the main body of the auxiliary roller 82. Multiple arc-shaped protrusions 821 are evenly arranged on the auxiliary roller 82 corresponding to the annular groove 21.

[0042] The annular groove 21 provides space for sand falling to the bottom of the track 3, facilitating its leakage through the corresponding sand-draining holes and promoting sand recycling as well as the normal operation of the drive shaft 2 and track 3. After adjusting the extension of the vertical electric push rod 83, the vertical U-shaped plate 81 drives the auxiliary roller 82 upwards. When the arc-shaped protrusion 821 on the larger diameter area of ​​the auxiliary roller 82 presses against the track 3, the track 3 at the annular groove 21 bends inwards, making the diameter of the sand-draining holes on the inner side of the track 3 larger than that on the outer side, thus facilitating the discharge of sand from the inner side of the track 3.

[0043] An inclined filter screen 16 is fixed to the inner wall of the housing 1. The height of the filter screen 16 near the side door 12 of the housing 1 is greater than the height of the filter screen 16 away from the side door 12 of the housing 1. A return port 17 is provided on the side wall of the housing 1 near the bottom of the filter screen 16. A return box 18 is fixed to the outer wall of the housing 1. A feed port 181 is provided on the return box 18 at the position corresponding to the return port 17. The height of the bottom wall of the return box 18 increases from the middle of the return box 18 to both ends. A return pipe 19 is fixed and connected to the top of the return box 18. An auger 191 for recycling the sand in the return box 18 to the sandblasting assembly 4 is provided in the return pipe 19.

[0044] The filter screen 16 screens the falling sand, filtering out some severely worn sand to ensure the uniformity of the recycled sand particles, which is beneficial to ensuring the uniformity of brake pad processing. The sand that rolls down the filter screen 16 to the return port 17 and the feed port 181 enters the return box 18, and the auger 191 recovers the sand in the return box 18 into the sandblasting assembly 4 for continued use.

[0045] To facilitate the discharge of the sandblasted brake pads, multiple strip-shaped protrusions 31 are evenly fixed on the outer surface of the track 3. After opening the side door 12, the track 3 is controlled to rotate in the opposite direction, so that the sandblasted brake pads can be unloaded from the side door 12 through the track 3.

[0046] The housing 1 is also equipped with an adsorption assembly 9 for removing magnetic impurities. The adsorption assembly 9 includes a threaded rod 91 rotatably mounted on the side wall of the housing 1, a guide rod 92 fixed to the side wall of the housing 1 and parallel to the threaded rod 91, a movable block 93 jointly arranged on the guide rod 92 and the threaded rod 91, a magnetic block 94 fixed to the bottom of the movable block 93, and a drive motor 95 fixed to the side wall of the housing 1 for driving the threaded rod 91 to rotate. The threaded rod 91 passes through the movable block 93 and is threadedly connected. The guide rod 92 passes through the movable block 93 and is slidably engaged. The threaded rod 91, the guide rod 92, the movable block 93 and the magnetic block 94 are all located inside the track 3. An outlet 10 is provided on one side of the housing 1 for the movable block 93 and the magnetic block 94 to slide out.

[0047] After the drive motor 95 starts working, it drives the threaded rod 91 to rotate. Since the threaded rod 91 is threadedly connected to the movable block 93, and the guide rod 92 is slidably engaged with the movable block 93, the movable block 93 moves axially along the threaded rod 91. The magnetic block 94 moves synchronously with the movable block 93 and attracts the magnetic material (such as magnetic debris generated during the sandblasting process of the brake lining) on ​​the inner side of the track 3. When the movable block 93 moves to the outlet 10, the staff can clean the magnetic debris attached to the magnetic block 94, which reduces the content of magnetic impurities in the recycled sand and helps to ensure the efficiency and quality of the sandblasting process of the brake lining.

[0048] The above description is merely a preferred embodiment of the present invention. The scope of protection of the present invention is not limited to the above embodiments. All technical solutions falling within the scope of the present invention's concept are within the scope of protection of the present invention. It should be noted that for those skilled in the art, any improvements and modifications made without departing from the principles of the present invention should also be considered within the scope of protection of the present invention.

Claims

1. A brake pad surface sandblasting device, comprising a housing (1), three drive shafts (2) rotatably mounted between the inner walls on both sides of the housing (1), a track (3) being connected to the shaft surface of the three drive shafts (2), an end plate (11) for shaping the track (3) into a C-shape being rotatably mounted on the inner wall of the housing (1) near the end of the drive shafts (2), the opening of the C-shaped track (3) facing the side door (12) of the housing (1), two end plates (11) being provided and symmetrically distributed on both sides of the housing (1), a sandblasting assembly (4) for sandblasting the brake pads on the track (3) being provided on the housing (1), and a plurality of sand leakage holes being provided through the track (3), characterized in that: The housing (1) is provided with an external support mechanism (5) located inside the C-shaped track (3) and extending the track (3) outward. The housing (1) is also provided with a cleaning component (6) for cleaning the sand leakage holes on the extended track (3). The external support mechanism (5) includes an external support assembly (51), which includes an end plate (511) movably installed within a C-shaped track (3). Two end plates (511) are provided and symmetrically distributed on both sides of the housing (1). The external support assembly (51) also includes an external support strip (512) fixed between the two end plates (511). The side of the external support strip (512) away from the axis of the end plate (511) has a protruding arc-shaped surface. The outer surface is provided with a relief hole (5121) extending toward the axis of the end plate (511), the relief hole (5121) corresponds to the position of the sand leakage hole on the track (3), the outer support bar (512) is provided with a plurality of them and is evenly distributed about the axis of the end plate (511), the outer support mechanism (5) also includes a control component (52) for driving the end plate (511) toward a side close to or away from the axis of the end plate (11) so that the arc-shaped surface separates from or abuts against the inner surface of the track (3); The control component (52) includes a transverse U-shaped plate (521) located outside the track (3) and a transverse electric push rod (522) fixed on the outer wall of the housing (1). The push rod of the transverse electric push rod (522) passes through the housing (1) and is slidably engaged. The end of the push rod of the transverse electric push rod (522) is fixed to the side of the transverse U-shaped plate (521) away from the track (3). A transverse clearance groove (13) for the transverse U-shaped plate (521) to move is provided on the inner wall of the housing (1). The track (3) is located between the plates on both sides of the transverse U-shaped plate (521). The two end plates (511) are rotatably connected to the plates on both sides of the transverse U-shaped plate (521). The cleaning assembly (6) is provided in multiple sets arranged in a straight line. The cleaning assembly (6) arranged in a straight line is parallel to the axial direction of the drive shaft (2). Each set of cleaning assemblies (6) corresponds to a sand leakage hole on the same row of the track (3). The cleaning assembly (6) includes a connecting post (61) fixed to the inner wall of the housing (1), a sleeve (62) connected to the end of the connecting post (61) away from the inner wall of the housing (1), a sliding block (63) that slides with the inner wall of the sleeve (62), and a spring (64) fixed to the side of the sliding block (63) near the connecting post (61). The cleaning needle (65) is fixed to the side of the sliding block (63) away from the connecting column (61). The end of the spring (64) near the inner wall of the housing (1) is pressed against the end of the connecting column (61). The axis of the cleaning needle (65) coincides with the axis of the relief hole (5121). The diameter of the end of the cleaning needle (65) away from the connecting column (61) is smaller than the inner diameter of the sand leakage hole and the inner diameter of the relief hole (5121). The transverse U-shaped plate (521) is provided with a through hole (5211) at the position corresponding to the multiple sets of cleaning components (6) for multiple sets of sleeves (62) to pass through.

2. The brake pad surface sandblasting equipment according to claim 1, characterized in that: The middle section of the cleaning needle (65) is frustum-shaped, and the diameter of the middle section of the cleaning needle (65) decreases from the sliding block (63) to the outward support bar (512). The side wall of the sliding block (63) is fixed with two symmetrically arranged limiting blocks (631). The side wall of the sleeve (62) is provided with a limiting groove (621) for sliding cooperation of the limiting blocks (631). When the limiting block (631) and the limiting groove (621) are pressed together on the side away from the connecting column (61), the end of the cleaning needle (65) away from the connecting column (61) is located in the relief hole (5121).

3. The brake pad surface sandblasting equipment according to claim 1, characterized in that: A central rod (7) is fixed between the two end plates (511). A reinforcing rod (71) is fixed to the side wall of the central rod (7). The end of the reinforcing rod (71) away from the central rod (7) is fixed to the side of the outer support bar (512) near the axis of the end plate (511). The number of reinforcing rods (71) around the central rod (7) is equal to the number of outer support bars (512) and their positions correspond one-to-one.

4. The brake pad surface sandblasting equipment according to claim 1, characterized in that: Multiple monitors (14) for monitoring the cleaning needles (65) are fixed on the top wall of the inner casing (1). Multiple annular grooves (21) are evenly arranged on the drive shaft (2) located near the bottom of the casing (1). An auxiliary discharge assembly (8) for promoting the leakage of sand from the bottom of the track (3) is also provided in the casing (1). The auxiliary discharge assembly (8) includes a vertical U-shaped plate (81) set in the casing (1), an auxiliary roller (82) rotatably installed between the plates on both sides of the vertical U-shaped plate (81) and located below the track (3), and a vertical electric push rod (83) fixed to the bottom of the casing (1). The push rod of the moving push rod (83) passes through the bottom and is clearance-fitted. The push rod of the vertical electric push rod (83) is fixed to the bottom of the vertical U-shaped plate (81). The track (3) is located between the plates on both sides of the vertical U-shaped plate (81). The inner wall of the housing (1) is provided with a vertical clearance groove (15) for the vertical U-shaped plate (81) to move. The cross-section of the auxiliary roller (82) is circular. The diameter of the cross-section circle of the auxiliary roller (82) corresponding to the annular groove (21) is larger than the diameter of the cross-section circle of the auxiliary roller (82) body. A plurality of arc-shaped protrusions (821) are evenly arranged on the position corresponding to the auxiliary roller (82) and the annular groove (21).

5. A brake pad surface sandblasting device according to claim 3, characterized in that: An inclined filter screen (16) is fixed to the inner wall of the housing (1). The height of the filter screen (16) near the side door (12) of the housing (1) is greater than the height of the filter screen (16) away from the side door (12) of the housing (1). A return port (17) is provided on the side wall of the housing (1) near the bottom of the filter screen (16). A return box (18) is fixed to the outer wall of the housing (1). An inlet (181) is provided on the return box (18) at the position corresponding to the return port (17). The height of the bottom wall of the return box (18) increases from the middle of the return box (18) to both ends. A return pipe (19) is fixed and connected to the top of the return box (18). An auger (191) for recycling the sand in the return box (18) to the sandblasting assembly (4) is provided in the return pipe (19).

6. The brake pad surface sandblasting equipment according to claim 3, characterized in that: The outer surface of the track (3) is uniformly fixed with multiple strip-shaped protrusions (31).

7. A brake pad surface sandblasting device according to claim 3, characterized in that: The housing (1) is also provided with an adsorption assembly (9) for removing magnetic impurities. The adsorption assembly (9) includes a threaded rod (91) rotatably mounted on the side wall of the housing (1), a guide rod (92) fixed on the side wall of the housing (1) and parallel to the threaded rod (91), a movable block (93) jointly arranged on the guide rod (92) and the threaded rod (91), a magnetic block (94) fixed at the bottom of the movable block (93), and a drive motor (95) fixed on the side wall of the housing (1) for driving the threaded rod (91) to rotate. The threaded rod (91) passes through the movable block (93) and is threadedly connected. The guide rod (92) passes through the movable block (93) and is slidably engaged. The threaded rod (91), guide rod (92), movable block (93) and magnetic block (94) are all located inside the track (3). An outlet (10) is provided on one side of the housing (1) for the movable block (93) and magnetic block (94) to slide out.

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