A clamping device for rough machining of automobile brake disc and a method of using the same

Abstract

The application belongs to the technical field of workpiece clamping devices on machine tools, and particularly relates to a clamping device for rough machining of automobile brake discs and a use method thereof. In view of the problem of frequent replacement of clamping modes in the prior art, the following scheme is proposed. The clamping device for rough machining of automobile brake discs comprises a mounting seat, a rotating column rotatably connected to the top of the mounting seat, a driving motor fixed in the mounting seat, an output shaft of the driving motor fixedly connected to the bottom end of the rotating column, a base fixed to the top of the rotating column, and a bearing disc fixed to the top of the base. The clamping device further comprises a plurality of rectangular holes arranged in the bearing disc. The clamping device can control the forward and reverse rotation of the threaded cylinder by driving the third bevel gear to rotate through the shaft, and can further switch the first clamping structure and the second clamping structure, so that appropriate clamping modes can be selected when drilling and circumferential outer wall milling are performed, thereby saving time and effort and greatly improving the machining efficiency.

Description

Technical Field

[0001] This invention relates to the field of workpiece clamping devices on machine tools, and in particular to a clamping device for rough machining of automotive brake discs and its usage method. Background Technology

[0002] During the rough machining stage of the brake disc, the large outer circular surface, the middle hole, and the small circular end face of the brake disc need to be rough machined. At the same time, the inner hole also needs to be machined on the brake disc. During the machining of the inner hole, a drilling machine is needed to machine several through holes distributed in a circular array inside the brake disc. During this process, a clamping device is needed to hold the outer contour arc surface of the brake disc to fix the brake disc.

[0003] The existing technology still has the following shortcomings in the process of fixing the brake disc:

[0004] When drilling the center hole, the brake disc needs to be clamped on the outer surface. When machining the outer surface, the clamping method needs to be changed to clamp from the top, bottom, or inside the center hole. Therefore, the clamping method needs to be changed frequently during rough machining, which affects the machining efficiency.

[0005] To address the above problems, this invention proposes a clamping device for rough machining of automotive brake discs and its usage method. Summary of the Invention

[0006] The purpose of this invention is to address the shortcomings of existing clamping methods that require frequent changes, and to propose a clamping device and its usage method for rough machining of automotive brake discs.

[0007] To achieve the above objectives, the present invention adopts the following technical solution:

[0008] A clamping device for rough machining of automotive brake discs includes a mounting base, a rotating column rotatably connected to the top of the mounting base, a base fixed to the top of the rotating column, and a bearing plate fixed to the top of the base.

[0009] It also includes multiple rectangular holes provided in the bearing plate, and a first clamping plate is slidably fitted in each of the multiple rectangular holes for clamping the outer circumferential wall of the brake disc;

[0010] It also includes a stepped circular hole set in the bearing plate, and multiple Z-shaped clamping plates are rotatably arranged in the stepped circular hole for clamping the inner hole of the brake disc after drilling.

[0011] Multiple first clamping structures include a threaded cylinder that rotates within a bearing plate, the threaded cylinder having a threaded rod threadedly connected to it, one end of the threaded rod extending into an adjacent rectangular hole and having a slider fixed thereon, for driving the first clamping plate to move and clamp the brake disc;

[0012] Multiple second clamping structures include a base, a worm, and a worm wheel fixed to the inner wall of one side of the stepped circular hole. A rotating shaft is rotatably connected inside the base. The cooperation between the worm and the worm wheel is used to drive the rotating shaft and the Z-shaped clamping plate to rotate, thereby clamping the inner hole of the brake disc.

[0013] In one possible design, the first clamping plate has a first sliding groove on the side near the threaded cylinder, and the first sliding groove is slidably engaged with the slider. The inner walls of the two opposite sides of the rectangular hole are provided with inclined grooves, and sliding blocks are slidably connected in both inclined grooves. The two sliding blocks are respectively fixed on both sides of the first clamping plate.

[0014] In one possible design, the Z-shaped clamping plate is fixedly sleeved on the outer wall of the rotating shaft, and a worm gear is fixedly sleeved on the outer wall of the rotating shaft. The worm gear is located inside the Z-shaped clamping plate, and a worm is engaged at the top of the worm gear. The worm is rotatably connected to one side of the inner wall of the stepped circular hole. A gearbox is fixed inside the bearing plate. The input end of the gearbox is fixedly connected to the end of the threaded cylinder away from the slider, and the output end of the gearbox is fixedly connected to one end of the worm.

[0015] In one possible design, a drive structure is also included, disposed at the bottom of the support plate, for providing driving force to the first and second clamping structures. The drive structure includes an internal gear ring rotatably mounted on the bottom of the support plate, the internal gear ring being located within a base. Multiple drive shafts are rotatably connected within the support plate, the bottom ends of each drive shaft extending rotatably below the support plate and each fixed with a spur gear, all of which mesh with the internal gear ring. First bevel gears are fixed to the top ends of each drive shaft, and second bevel gears are fixedly fitted onto the outer walls of each of the multiple threaded cylinders, with the second bevel gears meshing with the first bevel gears. The meshing of the internal gear ring and the spur gear drives the first bevel gear and the second bevel gear to rotate. A damping shaft rotates through the base, and one end of the damping shaft extends into the base and is fixed with a third bevel gear. A bevel ring is fixedly sleeved on the outer wall of the internal gear ring, and the bevel ring meshes with the third bevel gear. When the damping shaft and the third bevel gear rotate, the third bevel gear drives the internal gear ring to rotate through the bevel ring. The internal gear ring drives the first bevel gear to rotate through the spur gear. The first bevel gear drives the threaded cylinder to rotate through the second bevel gear. The rotation of the threaded cylinder drives the first clamping structure and the second clamping structure to operate.

[0016] In one possible design, the top of the mounting base is fixed with multiple support columns, and the top of each of the multiple support columns is fixed with an arc-shaped block. The bottom of the bearing plate is provided with an annular groove, and the arc-shaped block slides into the annular groove to increase the stability of the bearing plate rotation.

[0017] In one possible design, the end of the damping shaft away from the third bevel gear has a hexagonal groove, and a hexagonal prism is engaged in the hexagonal groove. One end of the hexagonal prism is fixed with a plug shaft, and one end of the plug shaft passes through an adjacent support column. The plug shaft drives the third bevel gear to rotate through the engagement of the hexagonal prism and the hexagonal groove.

[0018] In one possible design, a drive motor is fixed inside the mounting base, the output shaft of the drive motor is fixedly connected to the bottom end of the rotating column, and a conical guide block located below the stepped circular hole is fixed on the bottom inner wall of the base to guide the debris generated during drilling to the surrounding area. The base is provided with multiple discharge holes to discharge the debris guided by the conical guide block to the outside.

[0019] In one possible design, the bearing plate has multiple cavities, and one end of each of the multiple threaded cylinders passes through an adjacent cavity. The meshing first bevel gear and the second bevel gear are located in the corresponding cavity, providing transmission space for the first bevel gear and the second bevel gear. A washer ring is fixed to the top of the bearing plate to create a gap between the brake disc and the top of the bearing plate, which facilitates the milling of the outer wall of the brake disc later. Two arc-shaped rubber pads are fixed to the side of each of the multiple first clamping plates that are close to each other to increase the clamping stability of the brake disc.

[0020] In one possible design, the first clamping plate has a circular groove, in which a circular block is slidably connected. A pull rod is fixed to the top of the circular block, and the top of the pull rod extends slidably to the top of the first clamping plate and is fixed with a pressure plate for clamping the brake disc in the vertical direction. A spring is fixed between the bottom of the pressure plate and the top of the first clamping plate, and the spring is sleeved on the outer wall of the pull rod. One side of the circular groove has a connecting groove that communicates with the first sliding groove. A protrusion is slidably connected in the connecting groove, and one side of the protrusion is fixedly connected to the circular block. The other side of the protrusion extends into the first sliding groove and is located below the slider. The cooperation between the slider and the protrusion is used to drive the circular block to move downward relative to each other. The first clamping plate moves obliquely upward under the action of the inclined groove. The slider can brake the protrusion in the first clamping plate, thereby causing the pressure plate to move downward relative to the first clamping plate. At this time, when the first clamping plate clamps the outer wall of the blank's circumference, the pressure plate can clamp the blank in the vertical direction, ensuring the stability of the blank clamping.

[0021] This application discloses a method for using a clamping device for rough machining of automotive brake discs, comprising the following steps:

[0022] S1. Installation and Drilling Preparation: The mounting base is installed with the brake disc drilling machine and surface milling machine using bolts. When drilling is required, the brake disc blank is placed on the washer ring, and the insert shaft is pushed to insert the hexagonal column into the hexagonal groove, which drives the damping shaft and the third bevel gear to rotate. The third bevel gear drives the internal gear ring through the bevel gear ring, and then drives the first bevel gear through the spur gear, and then drives the threaded cylinder through the second bevel gear to rotate. The threaded cylinder pulls the slider and the first clamping plate to clamp the blank through the threaded rod, and then drilling is performed.

[0023] S2. Release clamping after drilling: After drilling is completed, when the outer wall needs to be milled, rotate the insert shaft in the opposite direction to make the threaded cylinder rotate in the opposite direction, pushing the first clamping plate to move outward to release the clamping; the first clamping plate is stored in the rectangular hole along the inclined groove trajectory to avoid affecting the subsequent milling.

[0024] S3. Pre-milling clamping adjustment: When the threaded cylinder rotates in the reverse direction, the gearbox drives the worm to rotate, and the worm drives the rotating shaft and Z-type clamping plate to rotate 180 degrees through the worm wheel; the Z-type clamping plate rotates from the stepped round hole to the pre-drilled hole of the blank, and clamps it by pressing the inner wall of the hole; then the insert shaft is pulled out, and the drive motor drives the bearing plate to rotate through the rotating column to perform the milling operation;

[0025] S4. Chip Collection: Chips generated during milling fall onto the mounting base through rectangular holes for easy collection later; chips generated during drilling fall into the base and are discharged onto the mounting base through discharge holes under the guidance of tapered guide blocks, which is also easy to collect later.

[0026] S5. Clamping stability assurance: When the first clamping plate moves towards the center along the inclined groove to clamp the blank, the first clamping plate moves obliquely upward under the action of the inclined groove; the slider brakes the protrusion in the first clamping plate, so that the pressure plate moves downward relative to the first clamping plate; at this time, the pressure plate clamps the blank in the vertical direction to ensure clamping stability.

[0027] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0028] In this invention, the rotation of the threaded cylinder pulls the slider and the first clamping plate towards the center. The first clamping plate moves obliquely upward with the cooperation of the inclined groove and the sliding block. The first clamping plate moves out of the rectangular hole and clamps and fixes the outer circumference of the blank, which facilitates the drilling operation in the later stage. Conversely, the first clamping plate can be stored in the rectangular hole to avoid the first clamping plate affecting the milling of the outer wall of the brake disc in the later stage.

[0029] In this invention, when the threaded cylinder rotates in the reverse direction, the gearbox drives the worm to rotate. The worm drives the rotating shaft and the Z-shaped clamping plate to rotate 180 degrees through the worm wheel. This allows the Z-shaped clamping plate to rotate from the stepped circular hole to the pre-drilled hole in the blank. The blank is clamped by the extrusion of the inner wall of the hole by the Z-shaped clamping plate, which facilitates the subsequent milling operation of the outer circumference of the brake disc.

[0030] In this invention, the insert shaft drives the damping shaft and the third bevel gear to rotate. The third bevel gear drives the internal gear ring to rotate through the bevel gear ring. The internal gear ring drives the first bevel gear to rotate through the spur gear. The first bevel gear drives the threaded cylinder to rotate through the second bevel gear. The rotation of the threaded cylinder can drive the first clamping structure and the second clamping structure to operate, easily completing the switching between the first clamping structure and the second clamping structure, and improving the roughing efficiency of the brake disc.

[0031] In this invention, the first clamping plate moves obliquely upward under the action of the inclined groove, and the slider can brake the protrusion in the first clamping plate, thereby causing the pressure plate to move downward relative to the first clamping plate. At this time, when the first clamping plate clamps the outer wall of the circumference of the blank, the pressure plate can clamp the blank in the vertical direction, ensuring the stability of the blank clamping.

[0032] In this invention, the rotation of the third bevel gear driven by the insert shaft can control the forward and reverse rotation of the threaded cylinder, thereby enabling the switching between the first clamping structure and the second clamping structure. This allows for the selection of a suitable clamping method when drilling and milling the outer wall of the circumference, saving time and effort and greatly improving processing efficiency. In addition, when the first clamping structure is in operation, the brake disc can be clamped in the vertical direction through the cooperation of the slider and the protrusion, greatly increasing the stability of the clamping. Attached Figure Description

[0033] Figure 1 This is a three-dimensional structural schematic diagram of a clamping device for rough machining of automotive brake discs provided in Embodiment 1 of the present invention;

[0034] Figure 2 This is a three-dimensional exploded view of a clamping device for rough machining of automotive brake discs provided in Embodiment 1 of the present invention;

[0035] Figure 3 This is a three-dimensional cross-sectional view of a clamping device for rough machining of automotive brake discs provided in Embodiment 1 of the present invention;

[0036] Figure 4 for Figure 3 Enlarged structural diagram at point A in the middle;

[0037] Figure 5 This is a three-dimensional structural diagram of the bearing plate and arc-shaped block of a clamping device for rough machining of automotive brake discs provided in Embodiment 1 of the present invention;

[0038] Figure 6 This is a three-dimensional exploded view of the bevel gear ring, base and insert shaft of a clamping device for rough machining of automotive brake discs provided in Embodiment 1 of the present invention.

[0039] Figure 7This is a three-dimensional exploded view of the insert shaft and damping shaft of a clamping device for rough machining of automotive brake discs provided in Embodiment 1 of the present invention.

[0040] Figure 8 This is a three-dimensional exploded view of the threaded cylinder, rotating shaft, and Z-shaped clamping plate of a clamping device for rough machining of automotive brake discs provided in Embodiment 1 of the present invention.

[0041] Figure 9 This is a three-dimensional exploded view of the first clamping plate, slider, and threaded cylinder of a clamping device for rough machining of automotive brake discs provided in Embodiment 1 of the present invention.

[0042] Figure 10 This is a cross-sectional view of the first clamping plate, pressure plate, and slider of a clamping device for rough machining of automotive brake discs provided in Embodiment 2 of the present invention.

[0043] Figure 11 This is a three-dimensional exploded cross-sectional view of the first clamping plate, pressure plate, and circular block of a clamping device for rough machining of automotive brake discs provided in Embodiment 2 of the present invention.

[0044] In the diagram: 1. Mounting base; 2. Rotating column; 3. Drive motor; 4. Base; 5. Bearing plate; 6. Rectangular hole; 7. Inclined groove; 8. Sliding block; 9. First clamping plate; 10. Arc-shaped rubber pad; 11. First sliding groove; 12. Cavity; 13. Threaded cylinder; 14. Threaded rod; 15. Slider; 16. Stepped circular hole; 17. Base; 18. Rotating shaft; 19. Z-shaped clamping plate; 20. Worm gear; 21. Worm; 22. Gearbox; 23. Drive shaft; 24. First umbrella 25. Gear; 26. Spur gear; 27. Second bevel gear; 28. Internal gear ring; 29. ​​Bevel gear ring; 30. Third bevel gear; 31. Damping shaft; 32. Hexagonal groove; 33. Hexagonal column; 34. Insert shaft; 35. Support column; 36. Arc block; 37. Annular groove; 38. Washer ring; 39. Brake disc; 40. Conical guide block; 41. Material leakage hole; 42. Circular groove; 43. Circular block; 44. Tie rod; 45. Spring; 46. Pressure plate; 47. Connecting groove; 48. Protrusion. Detailed Implementation

[0045] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments.

[0046] Example 1: Refer to Figures 1-3This clamping device relates to the field of brake disc machining tooling technology. Its structure includes a mounting base 1 with a rotating connection structure on its top for mounting a rotating column 2. The bottom end of the rotating column 2 is fixed to the output shaft of a drive motor 3 fixed within the mounting base 1. The drive motor 3 can be a motor with a brake, so when the drive motor 3 starts, the rotation of its output shaft directly drives the rotating column 2 to rotate. A base 4 is fixed to the top of the rotating column 2, and a support plate 5 is fixed to the top of the base 4. The support plate 5 is the core part of the device, used to support and clamp the brake disc 38.

[0047] Reference Figure 3 Multiple rectangular holes 6 are formed within the bearing plate 5. The design of these rectangular holes 6 allows the first clamping plate 9 to slide within it. The main function of the first clamping plate 9 is to clamp the outer circumferential wall of the brake disc 38. To achieve this function, a first clamping structure was designed.

[0048] Reference Figure 3 , Figure 8 and Figure 9 The first clamping structure includes a threaded cylinder 13 that rotates within a bearing plate 5. The threaded cylinder 13 has internal threads and is threadedly connected to a threaded rod 14. One end of the threaded rod 14 extends into an adjacent rectangular hole 6 and is fixed with a slider 15. A first groove 11 is designed on the side of the first clamping plate 9 near the threaded cylinder 13, allowing the slider 15 to slide within the groove 11. Simultaneously, inclined grooves 7 are provided on both inner walls of the rectangular hole 6, and a sliding block 8 is slidably connected to each of the two inclined grooves 7. These two sliding blocks 8 are fixed to both sides of the first clamping plate 9.

[0049] Specifically, when the threaded cylinder 13 rotates, it drives the threaded rod 14 to move via the threaded connection, thereby causing the slider 15 to slide within the first groove 11 (the slider 15 (tolerance grade h7) and the first groove 11 (tolerance grade H8) form a clearance fit, with the clearance controlled within the range of 0.02-0.05mm). Since the slider 15 is connected to the first clamping plate 9, the first clamping plate 9 will also move accordingly. At the same time, since the two sides of the first clamping plate 9 are slidably connected to the inclined groove 7 via the sliding block 8, when the first clamping plate 9 moves, it will move obliquely upward under the guidance of the inclined groove 7 until it moves out of the rectangular hole 6 and clamps and fixes the outer circumference of the brake disc 38.

[0050] Reference Figure 3 and Figure 8 In addition, a stepped circular hole 16 is provided inside the bearing plate 5, and multiple Z-shaped clamping plates 19 are rotatably arranged inside the stepped circular hole 16. The main function of the Z-shaped clamping plates 19 is to clamp the inner hole of the brake disc 38 after drilling. To achieve this function, a second clamping structure was designed.

[0051] Reference Figure 3 , Figure 8 and Figure 9 The second clamping structure includes a base 17 fixed to the inner wall of one side of the stepped circular hole 16. A rotating shaft 18 is rotatably connected inside the base 17, and a Z-shaped clamping plate 19 is fixedly sleeved on the outer wall of the rotating shaft 18. A worm gear 20 is also fixedly sleeved on the outer wall of the rotating shaft 18, and the worm gear 20 is located inside the Z-shaped clamping plate 19. A worm 21 meshes with the top of the worm gear 20, and the worm 21 is rotatably connected to the inner wall of one side of the stepped circular hole 16 (the worm 21 is made of 45# steel with heat treatment, module m=2.5, number of threads z1=1, and forms a reduction mechanism with a transmission ratio i=40 with the worm gear 20 (material ZCuSn10P1), and the installation accuracy conforms to GB / T 10089-2018 standard). When the worm 21 rotates, it will drive the rotating shaft 18 to rotate through the cooperation of the worm gear and worm, thereby driving the Z-shaped clamping plate 19 to rotate. In order to achieve the rotation of the worm 21, a gearbox 22 is fixed inside the bearing plate 5. The input end of the gearbox 22 is fixedly connected to the end of the threaded cylinder 13 away from the slider 15, and the output end of the gearbox 22 is fixedly connected to one end of the worm 21.

[0052] Specifically, when the threaded cylinder 13 rotates in the reverse direction, it drives the worm gear 21 to rotate via the gearbox 22. The worm gear 21 then drives the rotating shaft 18 and the Z-shaped clamping plate 19 to rotate 180 degrees via the worm wheel 20, causing the Z-shaped clamping plate 19 to rotate from the stepped circular hole 16 into the drilled hole of the brake disc 38. By pressing the inner wall of the hole with the Z-shaped clamping plate 19, the brake disc 38 can be clamped.

[0053] Reference Figure 3 In order to provide driving force for the first clamping structure and the second clamping structure, a driving structure was also designed.

[0054] Reference Figure 3 , Figure 6 , Figure 8 and Figure 9The drive structure includes an internal gear ring 27 rotatably mounted on the bottom of the support plate 5, ensuring it is located within the internal space of the base 4. Multiple drive shafts 23 are rotatably connected inside the support plate 5. The bottom ends of these drive shafts 23 pass through the support plate 5 and extend downwards, with spur gears 25 fixed to their extended portions. Importantly, these spur gears 25 mesh with the internal gear ring 27, ensuring their transmission relationship. A first bevel gear 24 is fixed to the top of the drive shaft 23. Simultaneously, a second bevel gear 26 is fixedly fitted onto the outer wall of each threaded cylinder 13, meshing with the corresponding first bevel gear 24. When the internal gear ring 27 rotates, it drives the drive shaft 23 to rotate via the spur gears 25, which in turn drives the threaded cylinder 13 to rotate through the meshing relationship of the first bevel gear 24 and the second bevel gear 26. The rotation of the threaded cylinder 13 directly drives the first and second clamping structures to perform clamping or releasing operations.

[0055] Reference Figure 6 and Figure 7 To enable the rotation of the internal gear ring 27, a damping shaft 30 is rotatably inserted within the base 4. One end of the damping shaft 30 extends into the base 4 and is fixed to a third bevel gear 29. A bevel ring 28 is fixedly fitted onto the outer wall of the internal gear ring 27, and this bevel ring 28 meshes with the third bevel gear 29. Therefore, when the damping shaft 30 rotates, it drives the internal gear ring 27 to rotate through the meshing relationship between the third bevel gear 29 and the bevel ring 28.

[0056] Reference Figure 6 and Figure 7 To facilitate the rotation of the damping shaft 30, a hexagonal groove 31 is provided at the end of the damping shaft 30 furthest from the third bevel gear 29. A hexagonal prism 32 engages within this groove 31, and a shaft 33 is fixed to one end of the prism 32. One end of the shaft 33 passes through an adjacent support post 34. Therefore, when the damping shaft 30 needs to be rotated, simply push the shaft 33 inwards to insert the hexagonal prism 32 into the groove 31, and then rotate the shaft 33. The rotation of the shaft 33 will drive the damping shaft 30 and the third bevel gear 29 to rotate via the hexagonal prism 32, thus triggering the operation of the entire drive structure.

[0057] Reference Figure 5 and Figure 6 To increase the stability of the rotating bearing plate 5, an annular groove 36 is provided at the bottom of the bearing plate 5, and an arc-shaped block 35 is fixed on the top of the support column 34 at the top of the mounting base 1. These arc-shaped blocks 35 slide in the annular groove 36. When the bearing plate 5 rotates, the arc-shaped blocks 35 slide in the annular groove 36, thereby providing the necessary support and guidance to ensure that the bearing plate 5 can rotate smoothly and accurately.

[0058] Reference Figure 3 and Figure 6 A conical guide block 39 is fixed to the inner bottom wall of the base 4, located directly below the stepped circular hole 16. The conical guide block 39 is designed to guide the generated debris along its conical surface during drilling, preventing debris accumulation at the drilling location and thus improving processing efficiency. To facilitate the smooth discharge of debris guided by the conical guide block 39, the base 4 is also equipped with multiple discharge holes 40. These discharge holes 40 are evenly distributed to ensure that debris can be smoothly discharged from the inside of the device to the outside. A long brush can be used to assist in ensuring the smooth flow of debris through the discharge holes 40.

[0059] Reference Figure 3 and Figure 4 Inside the bearing disc 5, multiple cavities 12 are designed, providing the necessary transmission space for the meshing of the first bevel gear 24 and the second bevel gear 26. One end of each threaded cylinder 13 passes through the adjacent cavity 12, ensuring the normal operation of the transmission mechanism. In addition, a washer ring 37 is fixed to the top of the bearing disc 5. The function of the washer ring 37 is to form a gap between the brake disc 38 and the top of the bearing disc 5. This gap facilitates the subsequent milling of the outer wall of the brake disc 38.

[0060] Reference Figure 9 To increase the clamping stability of the brake disc 38, two arc-shaped rubber pads 10 are fixed on the side of the multiple first clamping plates 9 that are close to each other. The arc-shaped rubber pads 10 are made of soft and elastic material, which can provide additional friction during clamping and prevent the brake disc 38 from sliding or shifting during processing.

[0061] The clamping device for rough machining of automotive brake discs of the present invention can achieve stable clamping of the brake disc 38, improving machining accuracy and efficiency. At the same time, the design of this device also takes into account the different needs of the brake disc 38 during machining, such as clamping the outer circumference and the inner hole, making it more suitable for practical machining scenarios.

[0062] Example 2: Reference Figure 10 and Figure 11Inside the first clamping plate 9, a circular groove 41 is designed, and a circular block 42 is slidably connected within the groove 41. A pull rod 43 is fixed to the top of the circular block 42, and the top of the pull rod 43 extends slidably to the top of the first clamping plate 9, where a pressure plate 45 is fixed. The purpose of the pressure plate 45 is to provide additional clamping for the brake disc 38 in the vertical direction, ensuring its stability during processing. A spring 44 (made of 60Si2MnA material with a stiffness coefficient k=12N / mm) is also fixed between the bottom of the pressure plate 45 and the top of the first clamping plate 9, and the spring 44 is sleeved on the outer wall of the pull rod 43. To achieve automatic downward movement of the pressure plate 45, a connecting groove 46 is designed on one side of the circular groove 41, which communicates with the first sliding groove 11. A protrusion 47 is slidably connected within the connecting groove 46, with one side of the protrusion 47 fixedly connected to the circular block 42, and the other side extending into the first sliding groove 11 and located below the slider 15. When the first clamping plate 9 moves obliquely upward under the action of the inclined groove 7, the slider 15 will contact the protrusion 47, thereby driving the circular block 42 to move downward relative to it. The pressure plate 45 will then move downward relative to the first clamping plate 9, clamping the brake disc 38 in the vertical direction.

[0063] In this way, when the first clamping plate 9 clamps the outer circumference of the brake disc 38, the pressure plate 45 can provide additional clamping force in the vertical direction, ensuring the stability of the brake disc 38 during processing. This design not only improves processing efficiency but also guarantees processing quality.

[0064] A method of using a clamping device for rough machining of automotive brake discs includes the following steps:

[0065] S1. Mounting base 1 is installed with a drilling machine for brake disc 38 and a milling machine for the surface of brake disc 38 by bolts. When it is necessary to drill a hole in the brake disc 38, the rough blank of brake disc 38 is placed on the washer ring 37, and the insert shaft 33 is pushed inward so that the hexagonal column 32 is inserted into the hexagonal groove 31. The insert shaft 33 drives the damping shaft 30 and the third bevel gear 29 to rotate. The third bevel gear 29 drives the internal gear ring 27 to rotate through the bevel gear ring 28. The internal gear ring 27 drives the first bevel gear 24 to rotate through the spur gear 25. The first bevel gear 24 drives the threaded cylinder 13 to rotate through the second bevel gear 26. The threaded cylinder 13 pulls the slider 15 and the first clamping plate 9 towards the middle through the threaded rod 14, so that multiple first clamping plates 9 can clamp and fix the outer circumference of the rough blank, and then the rough blank can be drilled.

[0066] S2. When the outer wall milling is required after drilling, the insert shaft 33 is rotated in the opposite direction to drive the threaded cylinder 13 to rotate in the opposite direction. The threaded cylinder 13 pushes the first clamping plate 9 to move outward, releasing the clamping of the blank. When moving, the first clamping plate 9 is stored in the rectangular hole 6 along the trajectory of the inclined groove 7, so as to avoid the first clamping plate 9 extending above the bearing plate 5 and affecting the subsequent milling.

[0067] S3. In addition, when the threaded cylinder 13 rotates in the reverse direction, it drives the worm 21 to rotate through the gearbox 22. The worm 21 drives the rotating shaft 18 and the Z-shaped clamping plate 19 to rotate 180 degrees through the worm wheel 20. This allows the Z-shaped clamping plate 19 to rotate from the stepped round hole 16 into the pre-drilled hole in the blank. The blank is clamped by the extrusion of the inner wall of the hole by the Z-shaped clamping plate 19. Then, the insert shaft 33 is pulled out from the support column 34. Then, the drive motor 3 drives the bearing plate 5 to rotate through the rotating column 2. The outer wall of the blank is milled by the cutting tool.

[0068] S4. During the milling operation, the debris falls onto the mounting base 1 through the rectangular hole 6 for easy collection later. During the drilling operation, the debris falls into the base 4 and is discharged onto the mounting base 1 through the discharge hole 40 under the guidance of the conical guide block 39 for easy collection later.

[0069] S5. When the first clamping plate 9 moves towards the center along the trajectory of the inclined groove 7 to clamp the outer circumference of the blank, the first clamping plate 9 moves obliquely upward under the action of the inclined groove 7. The slider 15 can brake the protrusion 47 in the first clamping plate 9, thereby causing the pressure plate 45 to move downward relative to the first clamping plate 9. At this time, when the first clamping plate 9 clamps the outer circumference of the blank, the pressure plate 45 can clamp the blank in the vertical direction to ensure the stability of the blank clamping.

[0070] However, as is well known to those skilled in the art, the working principle and wiring method of the drive motor 3 are commonplace and are all conventional methods or common knowledge. They will not be described in detail here. Those skilled in the art can make any selections according to their needs or convenience.

[0071] The accompanying drawings are for illustrative purposes only. The dimensions and shapes of the components shown are not intended to be specific but are merely schematic representations. In actual implementation, the components can be configured and adjusted according to specific needs and circumstances.

[0072] 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 clamping device for rough machining of automotive brake discs, characterized in that, Includes a mounting base (1), the top of which is rotatably connected to a rotating column (2), the top of which is fixed to a base (4), and the top of which is fixed to a bearing plate (5). It also includes multiple rectangular holes (6) provided in the bearing plate (5), and a first clamping plate (9) is slidably fitted in each of the multiple rectangular holes (6) for clamping the outer circumferential wall of the brake disc (38); It also includes a stepped circular hole (16) set in the bearing plate (5), and a plurality of Z-shaped clamping plates (19) are rotatably provided in the stepped circular hole (16) for clamping the inner hole of the brake disc (38) after drilling. Multiple first clamping structures include a threaded cylinder (13) that rotates within a bearing plate (5), the threaded cylinder (13) having a threaded rod (14) threadedly connected to it, one end of the threaded rod (14) extending into an adjacent rectangular hole (6) and having a slider (15) fixed thereon, for driving the first clamping plate (9) to move and clamp the brake disc (38); Multiple second clamping structures include a base (17), a worm (21), and a worm wheel (20) fixed to the inner wall of one side of the stepped circular hole (16). A rotating shaft (18) is rotatably connected inside the base (17). The cooperation between the worm (21) and the worm wheel (20) is used to drive the rotating shaft (18) and the Z-shaped clamping plate (19) to rotate and clamp the inner hole of the brake disc (38). The first clamping plate (9) is provided with a first sliding groove (11) on the side near the threaded cylinder (13), and the first sliding groove (11) is slidably engaged with the slider (15). The inner walls of the two opposite sides of the rectangular hole (6) are provided with inclined grooves (7). Sliding blocks (8) are slidably connected in both inclined grooves (7). The two sliding blocks (8) are respectively fixed on both sides of the first clamping plate (9).

2. The clamping device for rough machining of automotive brake discs according to claim 1, characterized in that, The Z-shaped clamping plate (19) is fixedly sleeved on the outer wall of the rotating shaft (18). The outer wall of the rotating shaft (18) is fixedly sleeved with a worm gear (20), and the worm gear (20) is located inside the Z-shaped clamping plate (19). The top of the worm gear (20) is engaged with a worm (21). The worm (21) is rotatably connected to one side of the inner wall of the stepped circular hole (16). The bearing plate (5) is fixedly equipped with a gearbox (22). The input end of the gearbox (22) is fixedly connected to the end of the threaded cylinder (13) away from the slider (15). The output end of the gearbox (22) is fixedly connected to one end of the worm (21).

3. The clamping device for rough machining of automotive brake discs according to claim 2, characterized in that, It also includes a drive structure, which is disposed at the bottom of the support plate (5) to provide driving force for the first clamping structure and the second clamping structure. The drive structure includes an internal gear ring (27) that rotates at the bottom of the support plate (5) and is located inside the base (4). Multiple drive shafts (23) are rotatably connected inside the support plate (5). The bottom ends of the multiple drive shafts (23) all extend rotatably to the bottom of the support plate (5) and are all fixed with spur gears (25). The multiple spur gears (25) mesh with the internal gear ring (27). The top ends of the multiple drive shafts (23) are all fixed with first bevel gears (24). The outer walls of the multiple threaded cylinders (13) are all fixedly fitted with second bevel gears (26), and the second bevel gears (26) mesh with the first bevel gears (24). The engagement of the internal gear ring (27) and the spur gear (25) can drive the first bevel gears (24) and the second bevel gears (26) to rotate. A damping shaft (30) is rotatably passed through the base (4). One end of the damping shaft (30) extends into the base (4) and is fixedly fitted with a third bevel gear (29). The outer wall of the internal gear ring (27) is fixedly fitted with a bevel ring (28), and the bevel ring (28) meshes with the third bevel gear (29).

4. The clamping device for rough machining of automotive brake discs according to claim 3, characterized in that, The mounting base (1) has multiple support columns (34) fixed on its top, and each of the multiple support columns (34) has an arc-shaped block (35) fixed on its top. The bottom of the bearing plate (5) is provided with an annular groove (36), and the arc-shaped block (35) slides in cooperation with the annular groove (36) to increase the stability of the bearing plate (5) rotation.

5. The clamping device for rough machining of automotive brake discs according to claim 4, characterized in that, The damping shaft (30) has a hexagonal groove (31) at one end away from the third bevel gear (29). A hexagonal post (32) is engaged in the hexagonal groove (31). A plug shaft (33) is fixed at one end of the hexagonal post (32), and one end of the plug shaft (33) passes through the adjacent support post (34). The plug shaft (33) drives the third bevel gear (29) to rotate through the engagement of the hexagonal post (32) and the hexagonal groove (31).

6. The clamping device for rough machining of automotive brake discs according to claim 5, characterized in that, The mounting base (1) is fixed with a drive motor (3). The output shaft of the drive motor (3) is fixedly connected to the bottom end of the rotating column (2). The bottom inner wall of the base (4) is fixed with a conical guide block (39) located below the stepped circular hole (16) to guide the debris generated during drilling to the surrounding area. The base (4) is provided with multiple discharge holes (40) to discharge the debris guided by the conical guide block (39) to the outside.

7. The clamping device for rough machining of automotive brake discs according to claim 6, characterized in that, The bearing plate (5) is provided with multiple cavities (12), and one end of multiple threaded cylinders (13) passes through adjacent cavities (12). The meshing first bevel gear (24) and second bevel gear (26) are located in the corresponding cavities (12), providing transmission space for the first bevel gear (24) and second bevel gear (26). A washer ring (37) is fixed on the top of the bearing plate (5) to create a gap between the brake disc (38) and the top of the bearing plate (5), which facilitates milling of the outer wall of the brake disc (38) later. Two arc-shaped rubber pads (10) are fixed on the side of the multiple first clamping plates (9) that are close to each other to increase the clamping stability of the brake disc (38).

8. The clamping device for rough machining of automotive brake discs according to claim 7, characterized in that, The first clamping plate (9) has a circular groove (41) inside, and a circular block (42) is slidably connected inside the circular groove (41). A pull rod (43) is fixed to the top of the circular block (42). The top of the pull rod (43) extends slidably to the top of the first clamping plate (9) and is fixed with a pressure plate (45) for clamping the brake disc (38) in the vertical direction. A spring (44) is fixed between the bottom of the pressure plate (45) and the top of the first clamping plate (9), and the spring (44) The circular groove (41) is fitted onto the outer wall of the pull rod (43). One side of the circular groove (41) is provided with a connecting groove (46) that communicates with the first sliding groove (11). A protrusion (47) is slidably connected in the connecting groove (46), and one side of the protrusion (47) is fixedly connected to the circular block (42). The other side of the protrusion (47) extends into the first sliding groove (11) and is located below the slider (15). The cooperation between the slider (15) and the protrusion (47) is used to drive the circular block (42) to move downward relative to each other.

9. A method of using the clamping device for rough machining of an automotive brake disc as described in claim 8, characterized in that, Includes the following steps: S1. Installation and Drilling Preparation: The mounting base (1) is installed with the brake disc (38) drilling machine and surface milling machine by bolts; when drilling is required, the brake disc (38) blank is placed on the washer ring (37), and the insert shaft (33) is pushed to make the hexagonal column (32) insert into the hexagonal groove (31), which drives the damping shaft (30) and the third bevel gear (29) to rotate; the third bevel gear (29) drives the internal gear ring (27) through the bevel gear ring (28), and then drives the first bevel gear (24) through the spur gear (25), and then drives the threaded cylinder (13) through the second bevel gear (26); the threaded cylinder (13) pulls the slider (15) and the first clamping plate (9) through the threaded rod (14) to clamp the blank, and then drilling is performed; S2. Release clamping after drilling: After drilling is completed, when the outer wall needs to be milled, rotate the insert shaft (33) in the opposite direction to make the threaded cylinder (13) rotate in the opposite direction, and push the first clamping plate (9) to move outward to release the clamping; the first clamping plate (9) is stored in the rectangular hole (6) along the inclined groove (7) trajectory to avoid affecting the subsequent milling; S3. Pre-milling clamping adjustment: When the threaded cylinder (13) rotates in the reverse direction, the gearbox (22) drives the worm (21) to rotate. The worm (21) drives the rotating shaft (18) and the Z-shaped clamping plate (19) to rotate 180 degrees through the worm wheel (20). The Z-shaped clamping plate (19) rotates from the stepped round hole (16) into the pre-drilled hole of the blank and completes clamping by pressing the inner wall of the hole. Then the insert shaft (33) is pulled out, and the drive motor (3) drives the bearing plate (5) to rotate through the rotating column (2) to perform milling operation. S4, chip collection: chips generated during milling fall onto the mounting base (1) through the rectangular hole (6) for easy collection later; chips generated during drilling fall into the base (4) and are discharged onto the mounting base (1) through the discharge hole (40) under the guidance of the conical guide block (39), which is also easy to collect later. S5. Stable clamping: When the first clamping plate (9) moves towards the center along the inclined groove (7) to clamp the blank, the first clamping plate (9) moves obliquely upward under the action of the inclined groove (7); the slider (15) brakes the protrusion (47) in the first clamping plate (9) so that the pressure plate (45) moves downward relative to the first clamping plate (9); at this time, the pressure plate (45) clamps the blank in the vertical direction to ensure clamping stability.

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