Hole opening machining equipment for automobile brake disc heat dissipation holes

Abstract

The invention relates to the technical field of brake disc machining, and discloses an automobile brake disc heat dissipation hole trepanning machining device which comprises a trepanning seat, a fixing plate is vertically installed on one side of the upper end of the trepanning seat, a vertical groove is formed in the fixing plate, a moving block is slidably installed in the vertical groove, and a moving plate is fixedly installed on the moving block. A distance adjusting groove is formed in the movable plate, a distance adjusting block is slidably installed in the distance adjusting groove, a driven shaft is rotatably installed at the lower end of the distance adjusting block, a trepanning drill bit is detachably installed at the bottom of the driven shaft, a vertical moving mechanism is arranged on the fixed plate, a horizontal moving mechanism is arranged on the movable plate, and a fixed shaft is rotatably installed on the side, away from the fixed plate, of the trepanning base. A fixing mechanism is arranged on the fixing shaft, and a rotating mechanism is arranged on the lower side of the trepanning seat. According to the automobile brake disc punching device, the angle change effect of an automobile brake disc under the punching operation in the clamping state is achieved, and the punching requirements of different positions of the end face of the brake disc are met.

Description

Technical Field

[0001] The present invention relates to the technical field of brake disc processing, and particularly relates to a hole-opening processing device for heat dissipation holes of an automotive brake disc. Background Art

[0002] A brake disc is a key component in an automotive braking system, and its function is to friction with brake pads to achieve deceleration or stop the rotational movement of the vehicle. Among them, the purpose of drilling holes in the brake disc is to improve its performance and efficiency. At the same time, drilling holes can increase the surface area of the brake disc, contribute to heat dissipation, prevent the decline of braking performance caused by high temperature, and drilling holes can reduce the weight of the brake disc. At the same time, the holes can be used to discharge the dust generated during the braking process, and can also prevent the brake disc from generating resonance at a specific speed, improving driving stability.

[0003] In the existing brake disc hole-opening device, generally, a worker pushes the brake disc to be drilled under the drilling machine, and the drilling machine moves up and down reciprocally to perform the hole-drilling operation on the brake disc. After forming a hole position, it is still necessary to manually rotate the brake disc to perform the hole-drilling operation on the next hole position, which is time-consuming and laborious, and there are safety hazards. Therefore, further improvement is needed. Summary of the Invention

[0004] The purpose of the present invention is to provide a hole-opening processing device for heat dissipation holes of an automotive brake disc, without manual hole-drilling operation, so as to solve the problems raised in the above background art.

[0005] To achieve the above purpose, the present invention provides the following technical solutions:

[0006] A hole-opening processing device for heat dissipation holes of an automotive brake disc, including a hole-opening seat. One side of the upper end of the hole-opening seat is vertically installed with a fixing plate. A vertical groove is provided on the fixing plate. A moving block is slidably installed inside the vertical groove. A moving plate is fixedly installed on the moving block. An adjusting distance groove is provided on the moving plate. An adjusting distance block is slidably installed inside the adjusting distance groove. The lower end of the adjusting distance block is rotatably installed with a driven shaft. The bottom of the driven shaft is detachably installed with a hole-opening drill bit. A vertical moving mechanism for controlling the vertical position of the hole-opening drill bit is provided on the fixing plate. A horizontal moving mechanism for controlling the horizontal position of the hole-opening drill bit is provided on the moving plate. A fixing shaft is rotatably installed on the side of the hole-opening seat away from the fixing plate. A fixing mechanism is provided on the fixing shaft. A rotating mechanism for changing the rotation angle of the fixing mechanism is provided at the lower side position of the hole-opening seat.

[0007] As an improved scheme of the present invention: The horizontal moving mechanism includes motor plates symmetrically fixed on the moving plate. A horizontal screw rod is rotatably installed between the motor plates. An adjusting distance plate is installed on the horizontal screw rod through a threaded structure. The adjusting distance plate is fixed on the adjusting distance block. A horizontal motor is installed on one of the motor plates. The output end of the horizontal motor is connected to the horizontal screw rod. The horizontal moving mechanism further includes a torque output component.

[0008] As an improved solution of the present invention: The torque output assembly includes a driven gear fixedly installed on the driven shaft. An intermediate gear is meshed outside the driven gear. An intermediate shaft is fixedly installed at the central position of the intermediate gear. A lower connecting rod is hingedly installed between the intermediate shaft and the driven shaft. An active gear is also meshed outside the intermediate gear. An active shaft is fixedly installed at the central position of the active gear. An upper connecting rod is hingedly installed between the active shaft and the intermediate shaft. The active shaft is rotatably sleeved on the moving plate.

[0009] As an improved solution of the present invention: The vertical movement mechanism includes a vertical screw rod rotatably installed between the inner walls of the vertical groove. The vertical screw rod is installed on the moving block through a threaded structure. A vertical motor is also installed at the upper end of the fixed plate. The output end of the vertical motor is connected to the vertical screw rod. The vertical movement mechanism also includes a torque input assembly.

[0010] As an improved solution of the present invention: The torque input assembly includes a dual-axis motor installed on the opening seat. The output end at the upper side position of the dual-axis motor is connected to a rotating shaft. The rotating shaft is installed with a locking cylinder rotatably arranged on the moving block through a locking part. The upper end of the locking cylinder is connected to the active shaft through a belt member.

[0011] As an improved solution of the present invention: The locking part includes a locking groove arranged inside the locking cylinder and a locking block fixed outside the rotating shaft. The locking block is slidably arranged inside the locking groove.

[0012] As an improved solution of the present invention: The belt member includes a locking belt pulley fixed on the locking cylinder. A belt is sleeved outside the locking belt pulley. The belt passes through a through groove arranged on the fixed plate and is connected to an active belt pulley fixed on the active shaft.

[0013] As an improved solution of the present invention: The fixing mechanism includes a fixing disk fixed at the upper end of the fixed shaft. A plurality of fixing springs are fixedly installed on the inner wall of the fixing disk. A fixing ring is fixedly installed on the fixing springs.

[0014] As an improved solution of the present invention: The rotating mechanism includes a rotating shaft rotatably installed at the lower side position of the punching seat. One end of the rotating shaft is connected to the output end at the lower side position of the dual-axis motor through a gear set. The other end of the rotating shaft is fixedly installed with a rotating plate. A positioning plate is fixedly installed obliquely on the rotating plate. A positioning column is fixedly installed on the positioning plate. A limiting circular plate is also fixedly installed at the non-positioning plate position on the rotating plate. The rotating mechanism also includes a rotating component.

[0015] As an improved solution of the present invention: The rotating assembly includes a rotating circular shell fixed to the bottom of the fixed shaft. A plurality of special-shaped rotating grooves and limiting circular grooves are alternately arranged at the upper edge of the rotating circular shell. The special-shaped rotating grooves cooperate with the clamping columns, and the limiting circular grooves cooperate with the limiting circular plates.

[0016] Compared with the prior art, the beneficial effects of the present invention are:

[0017] 1. By providing a fixing mechanism on the opening seat and under the action of the rotating mechanism, the angle change of the automotive brake disc during the drilling operation in the clamped state is realized, meeting the opening requirements of the heat dissipation holes of the brake disc under different arcs;

[0018] 2. By providing a vertical moving mechanism and a horizontal moving mechanism on the fixing plate, the effective change of the radial position of the drilling bit on the brake disc is realized, and then the opening requirements at different positions on the end face of the brake disc are realized. It has strong practicability and high reliability. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is the overall front view structural schematic diagram of the present invention;

[0020] Figure 2 It is the overall side view structural schematic diagram of the present invention;

[0021] Figure 3 It is the overall bottom view structural schematic diagram of the present invention;

[0022] Figure 4 It is the structural schematic diagram of the fixing mechanism in the present invention;

[0023] Figure 5 It is the structural schematic diagram of the rotating mechanism in the present invention;

[0024] Figure 6 It is the partial structural schematic diagram of the present invention;

[0025] Figure 7 It is the structural schematic diagram of the horizontal moving mechanism in the present invention;

[0026] Figure 8 It is the structural schematic diagram of the vertical moving mechanism in the present invention.

[0027] In the figure: 1, opening seat; 2, support leg; 3, fixed plate; 4, dual-axis motor; 5, fixed disk; 6, vertical motor; 7, horizontal motor; 8, moving plate; 9, moving block; 10, opening drill bit; 11, rotating shaft; 12, gear set; 13, rotating shaft; 14, fixed shaft; 15, fixed spring; 16, fixed ring; 17, rotating circular shell; 18, special-shaped rotating groove; 19, limiting circular groove; 20, rotating plate; 21, limiting circular plate; 22, clamping plate; 23, clamping column; 24, locking cylinder; 25, driving shaft; 26, locking pulley; 27, driving pulley; 28, belt; 29, horizontal screw; 30, distance-adjusting plate; 31, distance-adjusting block; 32, distance-adjusting groove; 33, driven shaft; 34, driven gear; 35, lower connecting rod; 36, intermediate gear; 37, intermediate shaft; 38, upper connecting rod; 39, driving gear; 40, motor plate; 41, locking block; 42, vertical screw; 43, vertical groove; 44, through groove. Detailed implementation manner

[0028] It should be noted that, without conflict, the embodiments in the present invention and the features in the embodiments can be combined with each other.

[0029] In the description of the present invention, it should be understood that the orientation or positional relationship indicated by the terms "center", "longitudinal", "transverse", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation to the present invention. In addition, the terms "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly indicating the quantity of the indicated technical features. Thus, the features defined with "first", "second", etc. may explicitly or implicitly include one or more of such features. In the description of the present invention, unless otherwise specified, the meaning of "a plurality" is two or more.

[0030] In the description of the present invention, it should be noted that, unless otherwise clearly defined and limited, the terms "installation", "connection", "connection" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific situations.

[0031] The present invention will be described in detail below with reference to the drawings and in combination with embodiments.

[0032] Example 1

[0033] Refer to Figures 1 to 8 In the embodiment of the present invention, a drilling and processing device for the heat dissipation holes of an automotive brake disc includes a drilling seat 1. Symmetrically installed at the four corners of the bottom of the drilling seat 1 are support legs 2. Vertically installed on one side of the upper end of the drilling seat 1 is a fixed plate 3. A vertical groove 43 is provided on the fixed plate 3. A moving block 9 is slidably installed inside the vertical groove 43. A moving plate 8 is fixedly installed on the moving block 9. An adjustment groove 32 is provided on the moving plate 8. An adjustment block 31 is slidably installed inside the adjustment groove 32. The lower end of the adjustment block 31 is rotatably installed with a driven shaft 33. A drilling bit 10 is detachably installed at the bottom of the driven shaft 33. A vertical movement mechanism for controlling the vertical position of the drilling bit 10 is provided on the fixed plate 3, and a horizontal movement mechanism for controlling the horizontal position of the drilling bit 10 is provided on the moving plate 8. A fixed shaft 14 is rotatably installed on the side of the drilling seat 1 away from the fixed plate 3. A fixing mechanism is provided on the fixed shaft 14. A rotating mechanism for changing the rotation angle of the fixing mechanism is provided at the lower side position of the drilling seat 1. During drilling, the automotive brake disc is fixed by the fixing mechanism, and at the same time, the rotation angle is changed under the action of the rotating mechanism. Then, with the cooperation of the horizontal movement mechanism, the drilling position is adjusted. Finally, under the action of the vertical movement mechanism, a rapid drilling operation is performed at the end face position of the brake disc.

[0034] In one case of this embodiment, the horizontal movement mechanism includes motor plates 40 symmetrically fixed on the moving plate 8. A horizontal screw rod 29 is rotatably installed between the motor plates 40. An adjustment plate 30 is installed on the horizontal screw rod 29 through a threaded structure. The adjustment plate 30 is fixed on the adjustment block 31. A horizontal motor 7 is installed on one of the motor plates 40. The output end of the horizontal motor 7 is connected to the horizontal screw rod 29. The horizontal movement mechanism further includes a torque output component.

[0035] Among them, the torque output component includes a driven gear 34 fixedly installed on the driven shaft 33. An intermediate gear 36 is meshed outside the driven gear 34. An intermediate shaft 37 is fixedly installed at the central position of the intermediate gear 36. A lower connecting rod 35 is hingedly installed between the intermediate shaft 37 and the driven shaft 33. The intermediate gear 36 is also meshed with a driving gear 39 outside. A driving shaft 25 is fixedly installed at the central position of the driving gear 39. An upper connecting rod 38 is hingedly installed between the driving shaft 25 and the intermediate shaft 37. The driving shaft 25 is rotatably sleeved on the moving plate 8.

[0036] When it is necessary to change the horizontal position of the hole - opening drill bit 10, the horizontal motor 7 is started to make the horizontal screw rod 29 rotate. Then, under the cooperation of the thread structure, the distance - adjusting plate 30 drives the distance - adjusting block 31 to perform a horizontal linear motion along the inside of the distance - adjusting groove 32, and finally realizes the rapid adjustment of the horizontal position of the hole - opening drill bit 10. During this process, due to the limiting effect between the upper connecting rod 38 and the lower connecting rod 35, the torque on the driving shaft 25 is always transmitted to the hole - opening drill bit 10 through the driving gear 39, the intermediate gear 36, and the driven gear 34. Furthermore, it ensures that the hole - opening drill bit 10 can still maintain a rotational motion when the position changes, thereby achieving the purpose of opening the heat - dissipation holes on the brake disc.

[0037] In the preferred case of this embodiment, the vertical moving mechanism includes a vertical screw rod 42 rotatably installed between the inner walls of the vertical groove 43. The vertical screw rod 42 is installed on the moving block 9 through a thread structure. The upper end of the fixing plate 3 is also provided with a vertical motor 6, and the output end of the vertical motor 6 is connected to the vertical screw rod 42. The vertical moving mechanism also includes a torque input component.

[0038] Among them, the torque input component includes a double - shaft motor 4 installed on the hole - opening seat 1. The output end at the upper side of the double - shaft motor 4 is connected to a rotating shaft 11. The rotating shaft 11 is installed with a locking cylinder 24 rotatably arranged on the moving block 9 through a locking part. The upper end of the locking cylinder 24 is connected to the driving shaft 25 through a belt - wheel component.

[0039] When it is necessary to adjust the up - and - down position of the hole - opening drill bit 10 for the hole - opening action, on the one hand, the vertical motor 6 is started, so that the vertical screw rod 42 rotates. Then, under the cooperation of the thread structure, the moving block 9 moves downward along the inside of the vertical groove 43. On the other hand, the double - shaft motor 4 is started to make the rotating shaft 11 rotate. Then, under the cooperation of the locking part and the driving component, the hole - opening drill bit 10 starts to work, and finally realizes the purpose of opening the heat - dissipation holes on the brake disc.

[0040] In addition, in order to ensure that the torque of the rotating shaft 11 is always transmitted to the locking cylinder 24 when the moving block 9 moves up and down, in this embodiment, the locking part includes a locking groove arranged inside the locking cylinder 24 and a locking block 41 fixed on the outer side of the rotating shaft 11. The locking block 41 is slidably arranged inside the locking groove.

[0041] In addition, in order to clamp and fix the automotive brake disc during the hole - opening operation, in this embodiment, the fixing mechanism includes a fixing disc 5 fixed at the upper end of the fixing shaft 14. A plurality of fixing springs 15 are fixedly installed on the inner wall of the fixing disc 5, and a fixing ring 16 is fixedly installed on the fixing springs 15. When clamping and fixing, only need to place the automotive brake disc between the plurality of fixing rings 16, and then it can be effectively clamped under the elastic force of the fixing springs 15.

[0042] In order to further ensure the opening quality of the heat dissipation holes on the automotive brake disc, we need to arrange the opening positions of the heat dissipation holes in a circular array on the end face of the brake disc. Therefore, when opening holes in the automotive brake disc, on the one hand, we need to ensure the time required for the hole-opening action, and at the same time, we also need to ensure its radian requirement. For this purpose, in this embodiment, the rotating mechanism includes a rotating shaft 13 rotatably installed at the lower side of the punching seat. One end of the rotating shaft 13 is connected to the output end at the lower side of the dual-axis motor 4 through a gear set 12. The other end of the rotating shaft 13 is fixedly installed with a rotating plate 20. An inclined clamping plate 22 is fixedly installed on the rotating plate 20. A clamping column 23 is fixedly installed on the clamping plate 22. A limiting circular plate 21 is also fixedly installed on the rotating plate 20 at a position other than the clamping plate 22. The rotating mechanism further includes a rotating component.

[0043] Among them, the rotating component includes a rotating circular shell 17 fixed to the bottom of the fixed shaft 14. A plurality of special-shaped rotating grooves 18 and limiting circular grooves 19 are alternately arranged at the upper edge of the rotating circular shell 17. The special-shaped rotating grooves 18 cooperate with the clamping columns 23, and the limiting circular grooves 19 cooperate with the limiting circular plates 21.

[0044] During the startup process of the dual-axis motor 4, through the transmission of the gear set 12, the rotating shaft 13 will rotate synchronously, and then drive the rotating plate 20 to rotate synchronously. When the clamping plate 22 drives the clamping column 23 to move to the position of the special-shaped rotating groove 18, it will drive the rotating circular shell 17 to rotate a certain angle. Then, under the action of the fixed shaft 14, the clamped brake disc will also rotate the corresponding angle. After that, the rotating shaft 13 will continue to rotate and exactly make the limiting circular plate 21 fit and position inside the limiting circular groove 19, avoiding the continuous rotation of the rotating circular shell 17 due to inertia. During this time, the rotating circular shell 17 will remain stationary for a period of time, and this period of time exactly corresponds to the time required for the hole-opening drill 10 during the hole-opening action.

[0045] Embodiment 2

[0046] In addition, in order to further reduce the motor setting cost, the present invention also provides another embodiment in which the torque input of the rotating mechanism and the torque input of the hole-opening drill 10 are set as the same power source. The difference between this embodiment and the above embodiment is that, among them, the belt pulley component includes a locking belt pulley 26 fixed to the locking cylinder 24. A belt 28 is sleeved outside the locking belt pulley 26. The belt 28 passes through a through groove 44 provided on the fixing plate 3 and is connected to a driving belt pulley 27 fixed to the driving shaft 25.

[0047] In summary: First, place the automotive brake disc inside the fixed disc 5, then use the fixing mechanism to clamp and fix the automotive brake disc. After that, through the horizontal movement mechanism, determine the opening positions of the heat dissipation holes on the end face of the automotive brake disc. After the positions are determined, start the dual-axis motor 4. On the one hand, under the action of the rotation mechanism, the automotive brake disc rotates intermittently at an angle, and on the other hand, the drilling bit 10 rotates self - sufficiently. At this time, the staff starts the vertical motor 6, and then with the cooperation of the vertical movement mechanism, makes the drilling bit 10 move downward, thereby performing the hole - opening operation on the end face position of the automotive brake disc.

[0048] The above are only the preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention shall be included within the protection scope of the present invention.

Claims

1. An opening processing device for the heat dissipation holes of an automotive brake disc, comprising an opening seat (1), characterized in that: One side of the upper end of the opening seat (1) is vertically installed with a fixing plate (3). A vertical groove (43) is provided on the fixing plate (3). A moving block (9) is slidably installed inside the vertical groove (43). A moving plate (8) is fixedly installed on the moving block (9). An adjusting groove (32) is provided on the moving plate (8). An adjusting block (31) is slidably installed inside the adjusting groove (32). The lower end of the adjusting block (31) is rotatably installed with a driven shaft (33). The bottom of the driven shaft (33) is detachably installed with a hole-opening drill bit (10). A vertical moving mechanism for controlling the vertical position of the hole-opening drill bit (10) is provided on the fixing plate (3), and a horizontal moving mechanism for controlling the horizontal position of the hole-opening drill bit (10) is provided on the moving plate (8). A fixed shaft (14) is rotatably installed on one side of the opening seat (1) away from the fixing plate (3). A fixing mechanism is provided on the fixed shaft (14). A rotating mechanism for changing the rotation angle of the fixing mechanism is provided at the lower side position of the opening seat (1).

2. The open-hole processing device for the heat dissipation holes of an automotive brake disc according to claim 1, wherein The horizontal moving mechanism includes motor plates (40) symmetrically fixed on the moving plate (8). A horizontal screw rod (29) is rotatably installed between the motor plates (40). An adjusting plate (30) is installed on the horizontal screw rod (29) through a threaded structure. The adjusting plate (30) is fixed on the adjusting block (31). A horizontal motor (7) is installed on one of the motor plates (40). The output end of the horizontal motor (7) is connected to the horizontal screw rod (29). The horizontal moving mechanism further includes a torque output component.

3. The open hole processing equipment for the heat dissipation holes of an automotive brake disc according to claim 2, wherein, The torque output component includes a driven gear (34) fixedly installed on the driven shaft (33). An intermediate gear (36) is meshed outside the driven gear (34). An intermediate shaft (37) is fixedly installed at the central position of the intermediate gear (36). A lower connecting rod (35) is hingedly installed between the intermediate shaft (37) and the driven shaft (33). The intermediate gear (36) is also meshed with a driving gear (39) outside. A driving shaft (25) is fixedly installed at the central position of the driving gear (39). An upper connecting rod (38) is hingedly installed between the driving shaft (25) and the intermediate shaft (37). The driving shaft (25) is rotatably sleeved on the moving plate (8).

4. A hole-opening processing device for a heat dissipation hole of an automotive brake disc according to claim 1, characterized in that, The vertical moving mechanism includes a vertical screw rod (42) rotatably installed between the inner walls of the vertical groove (43). The vertical screw rod (42) is installed on the moving block (9) through a threaded structure. A vertical motor (6) is further installed at the upper end of the fixing plate (3). The output end of the vertical motor (6) is connected to the vertical screw rod (42). The vertical moving mechanism further includes a torque input component.

5. The opening processing device for the heat dissipation holes of an automotive brake disc according to claim 4, wherein, The torque input component includes a double-shaft motor (4) installed on the opening seat (1). The output end at the upper side position of the double-shaft motor (4) is connected to a rotating shaft (11). The rotating shaft (11) is installed with a locking cylinder (24) rotatably arranged on the moving block (9) through a locking part. The upper end of the locking cylinder (24) is connected to the driving shaft (25) through a pulley member.

6. The opening processing equipment for the heat dissipation holes of an automotive brake disc according to claim 5, characterized in that, The locking part includes a locking groove arranged inside the locking cylinder (24) and a locking block (41) fixed to the outside of the rotating shaft (11), and the locking block (41) is slidably arranged inside the locking groove.

7. The opening processing equipment for the heat dissipation holes of an automotive brake disc according to claim 6, characterized in that, The pulley member includes a locking pulley (26) fixed to the locking cylinder (24), a belt (28) is sleeved outside the locking pulley (26), and the belt (28) passes through a through groove (44) arranged on the fixing plate (3) and is connected to a driving pulley (27) fixed to the driving shaft (25).

8. A hole opening and processing device for a heat dissipation hole of an automotive brake disc according to claim 1, characterized in that, The fixing mechanism includes a fixing disk (5) fixed to the upper end of the fixing shaft (14), a plurality of fixing springs (15) are fixedly installed on the inner wall of the fixing disk (5), and a fixing ring (16) is fixedly installed on the fixing springs (15).

9. The opening processing equipment for the heat dissipation holes of an automotive brake disc according to claim 7, characterized in that, The rotating mechanism includes a rotating shaft (13) rotatably installed at the lower side of the punching base, one end of the rotating shaft (13) is connected to the output end at the lower side of the dual-axis motor (4) through a gear set (12), the other end of the rotating shaft (13) is fixedly installed with a rotating plate (20), a positioning plate (22) is fixedly installed on the rotating plate (20) in an inclined manner, a positioning column (23) is fixedly installed on the positioning plate (22), a limiting circular plate (21) is also fixedly installed at a position on the rotating plate (20) other than the positioning plate (22), and the rotating mechanism further includes a rotating component.

10. The opening processing device for the heat dissipation holes of an automotive brake disc according to claim 9, characterized in that, The rotating component includes a rotating circular shell (17) fixed to the bottom of the fixing shaft (14), a plurality of special-shaped rotating grooves (18) and limiting circular grooves (19) are alternately arranged at the upper edge of the rotating circular shell (17), the special-shaped rotating grooves (18) are matched with the positioning columns (23), and the limiting circular grooves (19) are matched with the limiting circular plates (21).

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