A brake disc drilling device convenient for high-precision positioning

Abstract

The utility model provides a kind of brake disc drilling device of convenient high-precision positioning, it is related to drilling device technical field, the utility model includes machine table, the output end of servo motor is equipped with drill rod by shaft coupling, the top of bearing disc is provided with positioning device, the positioning device includes two locating blocks, the bottom of locating block is rotatably connected with connecting rod, the bottom outer surface of bearing disc is slidably connected with sliding ring, the utility model is equipped with positioning device, by being equipped with two sliding slots in the outer surface of bearing disc, and two locating blocks controlled by sliding ring are arranged, so that two locating blocks are synchronously moved position in the inside of sliding slot, when brake disc is drilled and processed, two locating blocks can be clamped in the outer surface two sides of brake disc or be rested in the inner ring surface two sides of brake disc, the inner and outer ring position of brake disc is conveniently clamped to be accurately processed, and the applicability when using drilling device is improved.

Description

Technical Field

[0001] This utility model relates to the field of drilling device technology, and in particular to a brake disc drilling device that facilitates high-precision positioning. Background Technology

[0002] The brake disc is the friction pair of a disc brake and a key component of the automotive braking system. The outer surface of the brake disc is circular. To process the brake disc, a drilling device is needed to create holes on its surface.

[0003] When drilling brake discs using a drilling device, it may be necessary to drill near the inner or outer ring surface of the brake disc. When adjusting the drilling position of the inner and outer rings of the brake disc, it is necessary to change the clamping block that fixes the position of the brake disc. If there is a deviation in the position of the clamping block that fixes the outer or inner ring of the brake disc when adjusting the position, it will affect the accuracy of the drilling device when drilling the surface of the brake disc, resulting in a decrease in the applicability of the drilling device. Utility Model Content

[0004] The purpose of this invention is to solve the problem that when adjusting the drilling position of the inner and outer rings of the brake disc, it is necessary to change the clamping block that fixes the position of the brake disc. If the position of the clamping block that fixes the outer or inner ring of the brake disc is deviated when adjusting the position of the clamping block, it will affect the accuracy of the drilling device when drilling the surface of the brake disc, resulting in a decrease in the applicability of the drilling device. Therefore, this invention proposes a brake disc drilling device that is convenient for high-precision positioning.

[0005] To achieve the above objectives, the present invention adopts the following technical solution: a brake disc drilling device for convenient and high-precision positioning, comprising a machine base, a bearing plate and a machine rod fixedly connected to the top of the machine base, a first electric push rod provided at the top of the machine rod, a slide rod installed on the output rod of the first electric push rod, the slide rod sliding at the top of the machine rod, a second electric push rod provided on one side of the slide rod, a support rod installed on the output rod of the second electric push rod, a servo motor provided at one end of the support rod, a drill rod installed at the output end of the servo motor via a coupling, and a positioning device for convenient positioning of the brake disc being processed provided at the top of the bearing plate.

[0006] Preferably, the positioning device includes two positioning blocks. The top of the bearing plate has two sliding grooves. The bottom ends of the two positioning blocks slide on the inner walls of the two sliding grooves respectively. The outer surfaces of the positioning blocks protruding from the top of the bearing plate are both arc-shaped. The bottom ends of the positioning blocks are rotatably connected to a connecting rod. The bottom outer surface of the bearing plate is slidably connected to a sliding ring. The end of the connecting rod away from the positioning block is rotatably connected to one side of the sliding ring. The bottom end of the sliding ring is equipped with a telescopic rod. The bottom end of the telescopic rod is fixedly connected to the top of the machine base. A third electric push rod is provided on the outer surface of the machine base near the bearing plate. The output rod of the third electric push rod is fixedly connected to the bottom end of the sliding ring.

[0007] The effect achieved by the above components is as follows: When drilling the brake disc by setting the positioning blocks, if it is necessary to clamp and fix the outer edge of the brake disc, the third electric push rod extends and pushes the sliding ring to move upward at the bottom end of the outer surface of the bearing disc. The telescopic rod extends simultaneously. At this time, the connecting rods on both sides of the sliding ring will rotate on one side of the sliding ring and the bottom end of the positioning block, respectively. The sliding ring pushes the two connecting rods to control the sliding of the positioning blocks in the groove on the outer surface of the bearing disc, so that the two positioning blocks move away from each other to the edge of the groove. Then, the brake disc is placed on the outer surface of the bearing disc. The third electric push rod retracts and pulls the sliding ring downward. The sliding ring pulls the two connecting rods to control the two positioning blocks to slide in the same direction on the inner wall of the groove, so that one side of the two positioning blocks contacts the two sides of the outer surface of the brake disc. When the position of the brake disc on the bearing disc is skewed, the positioning blocks will push the brake disc to move until the sides of the two positioning blocks that are close to each other can be clamped. When clamping and fixing the inner ring of the brake disc on the outer surface of the disc, the third electric push rod is first operated to retract and pull the sliding ring downward at the bottom of the outer surface of the bearing disc, so that the two positioning blocks move towards each other to the edge of the groove. Then, the inner ring of the brake disc is placed on the outer bottom of the two positioning blocks and contacts the bearing disc. Then, the third electric push rod is operated to extend and push the sliding ring upward, and the positioning blocks are moved through the connecting rod so that the two positioning blocks on opposite sides abut against the inner ring surface of the brake disc, thereby fixing the position of the brake disc on the bearing disc. Subsequently, the first electric push rod at the top of the machine rod is controlled by the control box at the top of the machine to extend or shorten and control the horizontal movement of the frame rod at the top of the machine rod. The second electric push rod on the outer surface of the frame rod is operated to extend and control the servo motor and drill rod to descend. The servo motor drives the drill rod to rotate through the output end and continuously controls the drill rod to descend, so that the rotating drill rod enters the surface of the brake disc to perform drilling on the brake disc.

[0008] Preferably, a bolt is threaded to one side of the bottom inner wall of the positioning block, and an L-shaped pressure block is rotatably connected to the top of the bolt. The end of the L-shaped pressure block away from the bolt slides on one side of the bottom of the slider, and the width of the pressure block is greater than the width of the groove.

[0009] The effect achieved by the above components is as follows: after the positioning block is fixed on the bearing plate, the bolts at the bottom of the two positioning blocks can be rotated to control the bolts to move upward on the bottom of the inner wall of the positioning block, pushing the pressure block to move and pressing the top of the pressure block against the bottom surface of the bearing plate, thereby further tightening the position of the positioning block inside the slide groove and the clamping of the brake disc.

[0010] Preferably, a plurality of rubber protrusions are fixedly connected to the top of the pressure block, and the protrusions are arranged linearly on the top of the pressure block.

[0011] The effect achieved by the above components is that by setting rubber protrusions, the friction between the top of the pressure block and the surface of the bearing plate when it presses against the bottom of the bearing plate can be increased, thereby improving the positional fastening effect of the pressure block on the positioning block.

[0012] Preferably, rotating rollers are rotatably connected to both sides of the bottom end of the positioning block, and the rotating rollers roll on the bottom surface of the bearing plate.

[0013] The effect achieved by the above components is that when the third electric push rod controls the positioning block to move inside the slide, the two rollers on both sides of the bottom end of the positioning block will roll on the bottom surface of the bearing plate, improving the stability when the positioning block is moved by the sliding ring.

[0014] Preferably, positioning grooves are provided on both sides of the inner wall of the slide groove, and protrusions are fixedly connected to both sides of the outer surface of the positioning block, and the protrusions slide on the inner wall of the positioning groove.

[0015] The effect achieved by the above components is that when the positioning block moves inside the slide, the protrusions on both sides will slide on the inner walls of the positioning grooves on both sides of the inner wall of the slide, further limiting the angle between the positioning block and the slide and the bearing plate, and avoiding the angular deviation of the positioning block as much as possible.

[0016] Preferably, a screw is rotatably connected to the top of the positioning block, an auxiliary block is threadedly connected to the outer surface of the screw, and a round rod is fixedly connected to the bottom of the auxiliary block, the round rod sliding on the inner wall of the positioning block.

[0017] The effect achieved by the above components is as follows: when using the positioning device, the screws at the top of the two positioning blocks can be rotated to control the auxiliary block to move upward on the outer surface of the screws and adjust the height of the auxiliary block at the top of the positioning block. This makes it easier to increase the total height of the positioning block and the auxiliary block to accommodate the larger thickness of the brake disc and improve the stability when clamping and fixing the brake disc.

[0018] Preferably, the auxiliary block has protrusions on both sides of the top of its outer surface, and the edge of the protrusion facing outward is a slope.

[0019] The effect achieved by the above components is as follows: when the positioning block restricts the position of the brake disc on the carrier disc, the height of the auxiliary block can be adjusted by rotating the screw so that the protrusions on both sides of the top of the auxiliary block abut against the top edge of the brake disc, thereby further improving the fixing effect on the brake disc.

[0020] Compared with the prior art, the advantages and positive effects of this utility model are as follows:

[0021] In this invention, by setting a positioning device, two grooves are opened on the outer surface of the bearing disc, and two positioning blocks controlled by a sliding ring are set, so that the two positioning blocks move synchronously inside the grooves. When drilling the brake disc, the two positioning blocks can be clamped on both sides of the outer surface of the brake disc or against both sides of the inner ring surface of the brake disc, which facilitates the clamping and precise processing of the inner and outer ring positions of the brake disc and improves the applicability of the drilling device. Attached Figure Description

[0022] Figure 1 This is a three-dimensional structural diagram of the present invention;

[0023] Figure 2 This is a three-dimensional structural diagram of the machine base of this utility model;

[0024] Figure 3 This is a three-dimensional structural diagram of the bearing plate of this utility model;

[0025] Figure 4 This is a three-dimensional structural diagram of the connecting rod of this utility model;

[0026] Figure 5 This is a three-dimensional structural diagram of the positioning block of this utility model.

[0027] Legend: 1. Machine base; 2. Positioning device; 21. Slide groove; 22. Positioning block; 23. Connecting rod; 24. Sliding ring; 25. Third electric push rod; 26. Telescopic rod; 27. Bolt; 28. Pressure block; 29. ​​Protrusion; 210. Rotary roller; 211. Protrusion; 212. Positioning groove; 213. Screw; 214. Auxiliary block; 215. Round rod; 216. Protrusion; 3. Bearing plate; 4. Machine rod; 5. First electric push rod; 6. Slide rod; 7. Second electric push rod; 8. Frame rod; 9. Servo motor. Detailed Implementation

[0028] Example 1, as Figure 1-2As shown, a brake disc drilling device for convenient and high-precision positioning includes a machine base 1. A bearing plate 3 and a machine rod 4 are fixedly connected to the top of the machine base 1. A first electric push rod 5 is provided at the top of the machine rod 4. A slide rod 6 is installed on the output rod of the first electric push rod 5. The slide rod 6 slides at the top of the machine rod 4. A second electric push rod 7 is provided on one side of the slide rod 6. A support rod 8 is installed on the output rod of the second electric push rod 7. A servo motor 9 is provided at one end of the support rod 8. A drill rod is installed at the output end of the servo motor 9 through a coupling. A positioning device 2 is provided at the top of the bearing plate 3 to facilitate positioning of the brake disc being processed.

[0029] Reference Figure 1-5As shown, in this embodiment: the positioning device 2 includes two positioning blocks 22. Two grooves 21 are formed at the top of the bearing plate 3. The bottom ends of the two positioning blocks 22 slide on the inner walls of the two grooves 21 respectively. The outer surfaces of the positioning blocks 22 protruding from the top of the bearing plate 3 are both arc-shaped. A connecting rod 23 is rotatably connected to the bottom end of the positioning blocks 22. A sliding ring 24 is slidably connected to the outer surface of the bottom end of the bearing plate 3. The end of the connecting rod 23 away from the positioning blocks 22 is rotatably connected to one side of the sliding ring 24. A telescopic rod 26 is installed at the bottom end of the sliding ring 24. The bottom end of the telescopic rod 26 is fixedly connected to the top of the machine base 1. A third electric push rod 25 is provided on the outer surface of the machine base 1 near the bearing plate 3. The output rod of the third electric push rod 25 is fixedly connected to the bottom end of the sliding ring 24. When drilling the brake disc, the positioning block 22 is placed. To fix the brake disc by clamping its outer edge, the third electric push rod 25 extends, pushing the sliding ring 24 upwards at the bottom of the outer surface of the bearing disc 3. Simultaneously, the telescopic rod 26 extends. At this time, the connecting rods 23 on both sides of the sliding ring 24 rotate on one side of the sliding ring 24 and at the bottom of the positioning block 22, respectively. The sliding ring 24 pushes the two connecting rods 23 to control the sliding of the positioning block 22 in the groove 21 on the outer surface of the bearing disc 3, causing the two positioning blocks 22 to move away from each other to the edge of the groove 21. Then, the brake disc is placed on the outer surface of the bearing disc 3. The third electric push rod 25 is then retracted, pulling the sliding ring 24 downwards. The sliding ring 24 pulls the two connecting rods 23 to control the movement of the positioning block 22. Two positioning blocks 22 slide in the same direction on the inner wall of the groove 21, so that one side of each positioning block 22 contacts the outer surface of the brake disc. When the brake disc is tilted on the support plate 3, the positioning blocks 22 will push the brake disc to move until the sides of the two positioning blocks 22 that are close to each other can be clamped on the outer surface of the brake disc. When it is necessary to clamp and fix the inner ring of the brake disc, first operate the third electric push rod 25 to retract and pull the sliding ring 24 downward at the bottom of the outer surface of the support plate 3, so that the two positioning blocks 22 move towards each other to the edge of the groove 21. Then, the inner ring of the brake disc is placed on the outer bottom of the two positioning blocks 22 and contacts the support plate 3. Then, operate the third electric push rod 25 to extend and push the sliding ring 24 upward, through the connecting rod 23. The positioning blocks 22 are moved so that the sides of the two positioning blocks 22 that are far apart from each other abut against the inner ring surface of the brake disc, thereby fixing the position of the brake disc on the support plate 3. Then, the first electric push rod 5 at the top of the machine rod 4 is controlled by the control box at the top of the machine 1 to extend or shorten the control frame rod 8 to move horizontally at the top of the machine rod 4, and the second electric push rod 7 on the outer surface of the control frame rod 8 is extended to control the servo motor 9 and the drill rod to descend. The servo motor 9 drives the drill rod to rotate through the output end and continuously controls the drill rod to descend, so that the rotating drill rod enters the surface of the brake disc to perform drilling on the brake disc. By setting the positioning device 2, two sliding grooves 21 are opened on the outer surface of the support plate 3, and two positioning blocks 22 controlled by the sliding ring 24 are set.By synchronously moving the two positioning blocks 22 within the slide groove 21, during drilling of the brake disc, the two positioning blocks 22 can be clamped on both sides of the outer surface of the brake disc or pressed against both sides of the inner ring surface of the brake disc. This facilitates precise clamping and machining of the inner and outer rings of the brake disc, improving the applicability of the drilling device.

[0030] Reference Figure 2-5 As shown in this embodiment: a bolt 27 is threadedly connected to one side of the inner wall of the bottom end of the positioning block 22. An L-shaped pressure block 28 is rotatably connected to the top of the bolt 27. The end of the L-shaped pressure block 28 away from the bolt 27 slides on one side of the bottom end of the slider. The width of the pressure block 28 is greater than the width of the slide groove 21. After the positioning block 22 is fixed in position on the bearing plate 3, the bolt 27 can be rotated at the bottom end of the two positioning blocks 22 to control the bolt 27 to move upward at the bottom end of the inner wall of the positioning block 22, pushing the pressure block 28 to move and press the top of the pressure block 28 against the bottom surface of the bearing plate 3. This further tightens the position of the positioning block 22 inside the slide groove 21 and the clamping of the brake disc. Several rubber protrusions 29 are fixedly connected to the top of the pressure block 28. The protrusions 29 are arranged linearly on the top of the pressure block 28. By setting the rubber protrusions 29, the friction between the top of the pressure block 28 and the surface of the bearing plate 3 when it is pressed against the bottom end of the bearing plate 3 can be increased, thereby improving the positional tightening effect of the pressure block 28 on the positioning block 22.

[0031] Reference Figure 2-5 As shown in this embodiment: Rollers 210 are rotatably connected to both sides of the bottom end of the positioning block 22. The rollers 210 roll on the bottom surface of the bearing plate 3. When the third electric push rod 25 controls the positioning block 22 to move inside the slide groove 21, the two rollers 210 on both sides of the bottom end of the positioning block 22 will roll on the bottom surface of the bearing plate 3, improving the stability when the positioning block 22 is moved by the sliding ring 24. Positioning grooves 212 are opened on both sides of the inner wall of the slide groove 21. Protrusions 211 are fixedly connected to both sides of the outer surface of the positioning block 22. The protrusions 211 slide on the inner wall of the positioning groove 212. When the positioning block 22 moves inside the slide groove 21, the protrusions 211 on both sides will slide on the inner wall of the positioning groove 212 on both sides of the inner wall of the slide groove 21, further limiting the angle between the positioning block 22 and the slide groove 21 and the bearing plate 3, and avoiding the angle of the positioning block 22 from deflecting as much as possible.

[0032] Reference Figure 2-5As shown in this embodiment: a screw 213 is rotatably connected to the top of the positioning block 22, and an auxiliary block 214 is threadedly connected to the outer surface of the screw 213. A round rod 215 is fixedly connected to the bottom end of the auxiliary block 214. The round rod 215 slides on the inner wall of the positioning block 22. When using the positioning device 2, the screws 213 at the top of the two positioning blocks 22 can be rotated to control the auxiliary block 214 to move upward on the outer surface of the screw 213, adjusting the height of the auxiliary block 214 at the top of the positioning block 22, which facilitates increasing the distance between the positioning block 22 and the auxiliary block 214. The total height of block 214 is adapted to the greater thickness of the brake disc, improving the stability when clamping and fixing the brake disc. The top two sides of the outer surface of the auxiliary block 214 are respectively provided with protrusions 216. The edge of the bottom end of the protrusion 216 facing outward is a slope. When the positioning block 22 restricts the position of the brake disc on the carrier disc 3, the height of the auxiliary block 214 can be adjusted by rotating the screw 213 so that the protrusions 216 on the top two sides of the auxiliary block 214 abut against the top edge of the brake disc, further improving the fixing effect of the brake disc.

[0033] Working principle: When drilling the brake disc, the screws 213 at the top of the two positioning blocks 22 can be rotated to control the auxiliary block 214 to move upward on the outer surface of the screws 213. The height of the auxiliary block 214 at the top of the positioning block 22 is adjusted to match the thickness of the brake disc. When it is necessary to fix the brake disc by clamping it at the outer edge, the third electric push rod 25 extends and pushes the sliding ring 24 to move upward at the bottom of the outer surface of the bearing plate 3. The telescopic rod 26 will extend simultaneously. At this time, the connecting rods 23 on both sides of the sliding ring 24 will rotate on one side of the sliding ring 24 and the bottom of the positioning block 22, respectively. The sliding ring 24 pushes the two connecting rods 23 to control the positioning block 22 at the bottom of the bearing plate 3. The groove 21 on the outer surface of the carrier disc 3 slides, causing the two positioning blocks 22 to move away from each other to the edge of the groove 21. Then, the brake disc is placed on the outer surface of the carrier disc 3. Next, the third electric push rod 25 is operated to retract and pull the sliding ring 24 downwards. The sliding ring 24 pulls the two connecting rods 23, controlling the two positioning blocks 22 to slide in the same direction on the inner wall of the groove 21, so that one side of each positioning block 22 contacts both sides of the outer surface of the brake disc. When the brake disc is misaligned on the carrier disc 3, the positioning blocks 22 will push the brake disc to move until the sides of the two positioning blocks 22 that are close to each other can be clamped onto the outer surface of the brake disc. The brake disc needs to be adjusted... When clamping and fixing the inner ring, first operate the third electric push rod 25 to retract and pull the sliding ring 24 downward at the bottom of the outer surface of the bearing disc 3, so that the two positioning blocks 22 move towards each other to the edge of the groove 21. Then, the inner ring of the brake disc is placed on the bottom of the outer side of the two positioning blocks 22 and contacts the bearing disc 3. Then, operate the third electric push rod 25 to extend and push the sliding ring 24 upward, and push the positioning blocks 22 to move their positions through the connecting rod 23, so that the two positioning blocks 22, on the side away from each other, respectively abut against the two sides of the inner ring surface of the brake disc, thereby fixing the position of the brake disc on the bearing disc 3. Then, rotate the bolt 27 at the bottom of the two positioning blocks 22 to control the position. The bolt 27 moves upward at the bottom of the inner wall of the positioning block 22, pushing the pressure block 28 to move and press the top of the pressure block 28 against the bottom surface of the bearing plate 3. This further tightens the position of the positioning block 22 inside the slide groove 21 and the clamping of the brake disc. Then, the control box at the top of the machine base 1 controls the first electric push rod 5 at the top of the machine rod 4 to extend or shorten the control frame rod 8 to move horizontally at the top of the machine rod 4. The second electric push rod 7 on the outer surface of the control frame rod 8 extends to control the servo motor 9 and the drill rod to descend. The servo motor 9 drives the drill rod to rotate through the output end and continuously controls the drill rod to descend, so that the rotating drill rod enters the surface of the brake disc to perform drilling on the brake disc.

[0034] The above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model in any other way. Any person skilled in the art may use the disclosed technical content to make changes or modifications to create equivalent embodiments for application in other fields. However, any simple modifications, equivalent changes, and modifications made to the above embodiments based on the technical essence of this utility model, without departing from the scope of the utility model's technical solution, still fall within the protection scope of this utility model's technical solution. In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. For those skilled in the art, the specific meaning of the above terms in this utility model can be understood through specific circumstances.

Claims

1. A brake disc drilling device for convenient and high-precision positioning, comprising a machine base (1), characterized in that: The top of the machine base (1) is fixedly connected to a bearing plate (3) and a machine rod (4). The top of the machine rod (4) is provided with a first electric push rod (5). The output rod of the first electric push rod (5) is equipped with a slide rod (6). The slide rod (6) slides on the top of the machine rod (4). A second electric push rod (7) is provided on one side of the slide rod (6). The output rod of the second electric push rod (7) is equipped with a support rod (8). A servo motor (9) is provided at one end of the support rod (8). A drill rod is installed at the output end of the servo motor (9) through a coupling. The top of the bearing plate (3) is provided with a positioning device (2) for facilitating the positioning of the brake disc being processed.

2. The brake disc drilling device for convenient and high-precision positioning according to claim 1, characterized in that: The positioning device (2) includes two positioning blocks (22). The top of the bearing plate (3) has two sliding grooves (21). The bottom ends of the two positioning blocks (22) slide on the inner walls of the two sliding grooves (21). The outer surfaces of the positioning blocks (22) protruding from the top of the bearing plate (3) are arc-shaped on both sides. The bottom end of the positioning block (22) is rotatably connected to a connecting rod (23). The bottom outer surface of the bearing plate (3) is slidably connected to a sliding ring (24). The end of the connecting rod (23) away from the positioning block (22) is rotatably connected to one side of the sliding ring (24). The bottom end of the sliding ring (24) is equipped with a telescopic rod (26). The bottom end of the telescopic rod (26) is fixedly connected to the top of the machine base (1). The outer surface of the machine base (1) near the bearing plate (3) is provided with a third electric push rod (25). The output rod of the third electric push rod (25) is fixedly connected to the bottom end of the sliding ring (24).

3. The brake disc drilling device for convenient and high-precision positioning according to claim 2, characterized in that: The bottom inner wall of the positioning block (22) is threaded with a bolt (27), and the top of the bolt (27) is rotatably connected with an L-shaped pressure block (28). The end of the L-shaped pressure block (28) away from the bolt (27) slides on the bottom side of the slider. The width of the pressure block (28) is greater than the width of the groove (21).

4. The brake disc drilling device for convenient and high-precision positioning according to claim 3, characterized in that: The top of the pressure block (28) is fixedly connected with several rubber protrusions (29), which are arranged linearly on the top of the pressure block (28).

5. The brake disc drilling device for convenient and high-precision positioning according to claim 4, characterized in that: The bottom two sides of the positioning block (22) are respectively rotatably connected to rollers (210), and the rollers (210) roll on the bottom surface of the bearing plate (3).

6. The brake disc drilling device for convenient and high-precision positioning according to claim 5, characterized in that: The inner wall of the slide (21) is provided with positioning grooves (212) on both sides, and the outer surface of the positioning block (22) is fixedly connected with protrusions (211) on both sides, and the protrusions (211) slide on the inner wall of the positioning groove (212).

7. The brake disc drilling device for convenient and high-precision positioning according to claim 6, characterized in that: The top of the positioning block (22) is rotatably connected to a screw (213), and the outer surface of the screw (213) is threadedly connected to an auxiliary block (214). The bottom end of the auxiliary block (214) is fixedly connected to a round rod (215), which slides on the inner wall of the positioning block (22).

8. The brake disc drilling device for convenient and high-precision positioning according to claim 7, characterized in that: The auxiliary block (214) has protrusions (216) on both sides of the top of its outer surface, and the bottom edge of the protrusion (216) facing outward is a slope.

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