Centering mechanism for detecting end jump of brake disc

Abstract

The utility model discloses a brake disc end jump detection centering mechanism comprising a base plate and a supporting seat, and the upper end of the supporting seat is provided with a fixed disc; the outer side of the fixed disc is movably connected with a rotary disc in a sleeving mode. Four positioning assemblies are arranged at the upper end of the rotary disc in the circumferential direction at equal intervals. A bearing disc is arranged at the upper end of the rotary disc, and an avoiding groove is formed in the inner side of the bearing disc. A driving air cylinder is arranged on the supporting base and movably connected with the rotary disc. According to the utility model, the multi-point stable clamping of the brake disc can be realized through the plurality of groups of positioning assemblies, and the shaking of the brake disc in the detection process is effectively prevented, so that the accurate positioning of the center of the brake disc is ensured, and the detection accuracy and reliability are greatly improved; the additionally-arranged L-shaped limiting plate and the limiting kidney-shaped hole in the L-shaped limiting plate are matched with the limiting pin, movement of the rotary disc in the horizontal direction is further limited, the stability of the whole centering mechanism is enhanced, the brake disc is more stable in the detection process, and the detection precision and efficiency are greatly improved.

Description

Technical Field

[0001] The utility model relates to the technical field of automobile brake disc detection, and particularly relates to a centering mechanism for detecting the end runout of a brake disc. Background Technique

[0002] Today, with the increasing emphasis on automotive safety performance and driving experience, the brake disc, as a key component of the braking system, its performance stability is particularly important. The brake disc realizes the effective braking of the vehicle by applying balanced and reverse pressure in cooperation with the pistons in the brake calipers. However, the end runout of the brake disc, as one of the main factors causing braking vibration, not only exacerbates the wear rate of vehicle components, reduces the riding comfort, but also directly threatens driving safety.

[0003] For the accurate detection of the end runout of the brake disc, the prior art generally adopts the method of placing the brake disc on a specific positioning table for the precise measurement of subsequent detection equipment. However, the design of the current positioning tables on the market often neglects the importance of an effective clamping and fixing mechanism, resulting in the brake disc being prone to shaking during the detection process. This instability not only hinders the precise centering of the brake disc but also greatly affects the accuracy of the detection data, making the detection results difficult to meet the expected standards, and thus may mislead subsequent maintenance or replacement decisions.

[0004] Therefore, developing a detection and centering mechanism that can stably clamp the brake disc and ensure precise centering is of great significance for improving the detection accuracy of the brake disc and ensuring the performance of the automotive braking system. Summary of the Invention

[0005] The purpose of the utility model is to provide a centering mechanism for detecting the end runout of a brake disc to solve the problems raised in the above background technique.

[0006] To achieve the above purpose, the utility model provides the following technical solutions:

[0007] A centering mechanism for detecting the end runout of a brake disc includes a bottom plate, on which a support seat is fixedly installed at the upper end; a fixed plate is provided at the upper end of the support seat, and the fixed plate is fixedly connected to the support seat by bolts; a turntable is sleeved outside the fixed plate, and the turntable is movably connected to the fixed plate, and positioning holes are respectively opened in the turntable and the fixed plate; four groups of positioning components are equidistantly arranged along the circumferential direction of the upper end of the turntable, and the positioning components are respectively movably connected to the turntable; a bearing tray is provided at the upper end of the turntable, and the bearing tray is fixedly connected to the turntable, and an avoidance groove adapted to the positioning components is opened inside the bearing tray; a driving cylinder is provided on the support seat, and the cylinder body of the driving cylinder is fixedly connected to the lower end of the support seat through a fixed support; a right-angled movable plate is provided at the top end of the piston rod of the driving cylinder, and one side edge of the right-angled movable plate is movably connected to the turntable.

[0008] Preferably, the positioning assembly includes a crank, one end of the crank is movably connected to the turntable through a rotating shaft, and a positioning pressing block is movably connected to the other end of the crank; one end of the positioning pressing block is hinged to the crank through a movable pin, and a fixed block is movably connected to the other end of the positioning pressing block; one end of the fixed block is hinged to the positioning pressing block through a movable pin, and the other end of the fixed block is fixedly connected to the upper end of the fixed disk through a bolt.

[0009] Preferably, an "L"-shaped limiting plate is provided at the lower end of the fixed disk, the short side of the "L"-shaped limiting plate is connected to the fixed disk through a bolt, and the long side of the "L"-shaped limiting plate is arranged outside the fixed disk and below the turntable.

[0010] Preferably, a limiting waist-shaped hole is formed along the length direction of the long side of the "L"-shaped limiting plate, and a limiting pin adapted to the limiting waist-shaped hole is provided at the lower end of the turntable; the limiting pin is arranged in the limiting waist-shaped hole, and the limiting pin can slide along the opening direction of the limiting waist-shaped hole.

[0011] Preferably, one side inner wall of the right-angle movable plate is fixedly connected to the top end of the piston rod of the driving cylinder, and the other side of the right-angle movable plate is arranged at the side part of the cylinder body of the driving cylinder and is arranged parallel to it; a limiting guide block is fixedly installed on the side wall of the cylinder body of the driving cylinder, and a slide rail is provided on the side of the right-angle movable plate close to the cylinder body of the driving cylinder; a limiting slide groove is formed on the side of the slide rail close to the driving cylinder, and the limiting slide groove is adapted to the limiting guide block.

[0012] Preferably, a driving block is provided on the side of the right-angle movable plate close to the driving cylinder, and the lower end of the driving block is fixedly connected to the right-angle movable plate; the upper end of the driving block extends below the turntable, and a movable groove is formed above the driving block.

[0013] Preferably, a fixing plate is provided at the lower end of the turntable close to the driving block, and a cam follower is provided at the lower end of the fixing plate; the cam follower is arranged in the movable groove, and the outer side wall of the cam follower is in rolling connection with the inner wall of the movable groove.

[0014] Compared with the prior art, the beneficial effects of the present utility model are as follows: Through the design of multiple sets of precise positioning components, the present utility model can achieve multi-point stable clamping of the brake disc, effectively preventing the brake disc from shaking during the detection process, thus ensuring the precise centering positioning of the brake disc, greatly improving the accuracy and reliability of the detection; The additional "L"-shaped limiting plate and the limiting waist holes and limiting pins thereon cooperate to further limit the movement of the turntable in the horizontal direction, enhancing the stability of the entire centering mechanism and making the brake disc more stable during the detection process; By using the design of the driving cylinder and the right-angled movable plate, the automatic driving and positioning of the turntable are realized, simplifying the operation process and improving the detection efficiency; At the same time, the cooperation of the slide rail and the limiting guide block ensures the smoothness and accuracy of the right-angled movable plate during the movement process; By adjusting the position and angle of the positioning components and the "L"-shaped limiting plate, the centering mechanism can adapt to the detection requirements of brake discs of different specifications and sizes, having strong versatility and flexibility; It effectively solves the problems of shaking and inaccurate positioning during the end run detection of the brake disc mentioned in the background technology, improves the detection accuracy and efficiency, and provides strong support for the performance evaluation of the automotive braking system. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 is a schematic structural view of the present utility model;

[0016] Figure 2 is a schematic internal structural view of the present utility model;

[0017] Figure 3 is a schematic structural view of the connection between the positioning components of the present utility model and the turntable and the positioning disc;

[0018] Figure 4 is a schematic structural view of the connection between the driving cylinder of the present utility model and the turntable;

[0019] Figure 5 is a schematic structural view of the positioning components of the present utility model;

[0020] Figure 6 is a schematic structural view of the driving cylinder of the present utility model;

[0021] Figure 7 is a schematic structural view of the connection between the right-angled movable plate and the driving block of the present utility model.

[0022] Wherein: 1. Base plate; 2. Support seat; 3. Fixed plate; 4. Turntable; 5. Positioning hole; 6. Positioning assembly; 601. Crank; 602. Positioning press block; 603. Fixed block; 7. Supporting tray; 8. Avoidance groove; 9. Driving cylinder; 10. Fixed support; 11. Right-angle movable plate; 12. "L"-shaped limiting plate; 13. Limiting waist hole; 14. Limiting pin; 15. Limiting guide block; 16. Slide rail; 17. Limiting chute; 18. Driving block; 19. Movable groove; 20. Fixed plate; 21. Cam follower. Detailed implementation mode

[0023] The following further elaborates on the present utility model in conjunction with the attached drawings.

[0024] Please refer to Figures 1 to 7 To achieve the above object, the present utility model provides the following technical solutions:

[0025] A runout detection and centering mechanism for a brake disc includes a base plate 1. A support seat 2 is fixedly installed at the upper end of the base plate 1. A fixed plate 3 is provided at the upper end of the support seat 2, and the fixed plate 3 is fixedly connected to the support seat 2 by bolts. A turntable 4 is sleeved outside the fixed plate 3. The turntable 4 is movably connected to the fixed plate 3, and positioning holes 5 are respectively opened in the middle of the turntable 4 and the fixed plate 3. Four groups of positioning assemblies 6 are equidistantly arranged along the circumferential direction of the upper end of the turntable 4, and the positioning assemblies 6 are respectively movably connected to the turntable 4. A supporting tray 7 is provided at the upper end of the turntable 4. The supporting tray 7 is fixedly connected to the turntable 4, and an avoidance groove 8 adapted to the positioning assembly 6 is opened inside the supporting tray 7. A driving cylinder 9 is provided on the support seat 2, and the cylinder body of the driving cylinder 9 is fixedly connected to the lower end of the support seat 2 through a fixed support 10. The top end of the piston rod of the driving cylinder 9 is provided with a right-angle movable plate 11, and one side edge of the right-angle movable plate 11 is movably connected to the lower end of the turntable 4.

[0026] The support seat 2 is fixedly bolted to the upper end of the base plate 1 to form a stable support platform. The fixed plate 3 is installed at the upper end of the support seat 2 and tightly connected thereto by bolts to ensure that the position of the fixed plate 3 will not shift. The turntable 4 is sleeved outside the fixed plate 3 and is movably connected to the fixed plate 3, allowing the turntable 4 to rotate within a certain range. The positioning holes 5 opened in the middle of the turntable 4 and the fixed plate 3 are used for subsequent positioning and calibration of the brake disc. At the upper end of the turntable 4, four groups of positioning assemblies 6 are equidistantly arranged along the circumferential direction, and these positioning assemblies 6 are respectively movably connected to the turntable 4, enabling them to move relative to the turntable 4 to a certain extent. Thus, the positioning assemblies 6 can flexibly adjust their positions when subjected to external forces to adapt to brake discs of different sizes and shapes. The supporting tray 7 is fixed to the upper end of the turntable 4 to support the brake disc to be detected. An avoidance groove 8 adapted to the positioning assembly 6 is opened inside the supporting tray 7 to ensure that the positioning assembly 6 will not interfere with the supporting tray 7 during movement.

[0027] By placing the brake disc to be detected on the bearing tray 7, the lower edge position of the brake disc is inserted into the positioning hole 5 and contacts the positioning component 6 at this time; start the driving cylinder 9, and the piston rod of the driving cylinder 9 pushes the right-angle movable plate 11, so that the right-angle movable plate 11 drives the turntable 4 and the bearing tray 7 to rotate. During the rotation of the turntable 4, the four groups of positioning components 6 arranged on the upper end of the turntable 4 will automatically adjust their positions according to the shape and size of the brake disc, and then firmly clamp the brake disc on the bearing tray 7 and achieve central positioning. Once the brake disc is firmly clamped and centrally positioned, the subsequent end jump detection can be started; after the detection is completed, the piston rod of the driving cylinder 9 retracts, thereby driving the turntable 4 and the positioning component 6 to automatically reset to the initial state and wait for the next detection; through the above work process, the centering mechanism for end jump detection of the brake disc can achieve efficient and accurate detection of the brake disc, improving the detection accuracy and efficiency.

[0028] Please refer to Figure 2 、 Figure 3 、 Figure 5 As an embodiment of the present invention, the positioning component 6 includes a crank 601. One end of the crank 601 is movably connected to the turntable 4 through a rotating shaft, and the other end of the crank 601 is movably connected with a positioning pressure block 602; one end of the positioning pressure block 602 is hinged to the crank 601 through a movable pin, and the other end of the positioning pressure block 602 is movably connected with a fixed block 603; one end of the fixed block 603 is hinged to the positioning pressure block 602 through a movable pin, and the other end of the fixed block 603 is fixedly connected to the upper end of the fixed disk 3 through a bolt.

[0029] In the above-described solution, one end of the crank 601 is movably connected to the turntable 4 through a rotating shaft, allowing the crank 601 to rotate relative to the turntable 4. The other end of the crank 601 is movably connected to the positioning press block 602, which is usually achieved through a movable pin, enabling the positioning press block 602 to swing relative to the crank 601 within a certain range. The other end of the positioning press block 602 is movably connected to the fixed block 603, also through a movable pin for hinging. The other end of the fixed block 603 is firmly fixed to the upper end of the fixed disk 3 by bolts, ensuring that the position of the fixed block 603 remains unchanged throughout the detection process. When the brake disc is placed on the supporting tray 7, the lower edge of the brake disc is inserted into the positioning hole 5 and contacts the positioning press block 602 on the positioning assembly 6. This contact process triggers the automatic adjustment mechanism of the positioning assembly 6. As the brake disc is placed, the positioning press block 602 is subjected to pressure from the brake disc. Since the positioning press block 602 is hinged to the crank 601 and the fixed block 603 through movable pins, the positioning press block 602 can automatically adjust its position and angle according to the shape and size of the brake disc. During this process, the crank 601 rotates around its rotating shaft with the turntable 4 to adapt to the position change of the positioning press block 602. At the same time, the positioning press block 602 also swings on the crank 601 through the movable pin to further adjust its contact position and force with the brake disc. When the positioning press block 602 is in close contact with the brake disc and applies sufficient clamping force, the brake disc is stably clamped on the supporting tray 7. At this time, all components of the positioning assembly 6 are in a dynamic balance state, jointly maintaining the position stability of the brake disc. Since four groups of positioning assemblies 6 are equidistantly arranged along the circumference of the turntable 4, when these positioning assemblies 6 work simultaneously, they can ensure that the brake disc is subjected to uniform clamping force in the horizontal direction. This uniform clamping force helps to center the brake disc at the geometric center of the supporting tray 7, thereby improving the accuracy of the detection.

[0030] Please refer to Figure 2 、 Figure 4 As an embodiment of the present utility model, an "L"-shaped limiting plate 12 is provided at the lower end of the fixed disk 3. The short side of the "L"-shaped limiting plate 12 is connected to the fixed disk 3 by bolts, and the long side of the "L"-shaped limiting plate 12 is disposed outside the fixed disk 3 and below the turntable 4. A limiting waist hole 13 is opened along the length direction of the long side of the "L"-shaped limiting plate 12. A limiting pin 14 adapted to the limiting waist hole 13 is provided at the lower end of the turntable 4. The limiting pin 14 is disposed in the limiting waist hole 13, and the limiting pin 14 can slide along the opening direction of the limiting waist hole 13.

[0031] In the above-described solution, the "L"-shaped limiting plate 12 is designed to have two parts, a short side and a long side. The short side is firmly connected to the lower end of the fixed disk 3 by bolts. This connection method ensures that the "L"-shaped limiting plate 12 will not break away from the fixed disk 3 due to external forces during the detection process. The long side is located outside the fixed disk 3 and extends below the turntable 4. Such a layout enables the long side to effectively limit the turntable 4 and prevent it from moving excessively in the vertical direction. On the long side of the "L"-shaped limiting plate 12, a limiting waist-shaped hole 13 is formed along its length direction. The limiting waist-shaped hole 13 usually has a certain length and width to accommodate and guide the movement of the limiting pin 14. The lower end of the turntable 4 is provided with a limiting pin 14 adapted to the limiting waist-shaped hole 13. The shape and size of the limiting pin 14 are carefully designed to ensure that it can smoothly insert into and slide within the limiting waist-shaped hole 13.

[0032] Furthermore, when the turntable 4 rotates under the action of the driving cylinder 9, the limiting pin 14 at the lower end of the turntable 4 will slide within the limiting waist-shaped hole 13 of the "L"-shaped limiting plate 12 accordingly. Since the limiting waist-shaped hole 13 has a certain length, the limiting waist-shaped hole 13 restricts the movement range of the limiting pin 14, and thus restricts the rotation angle of the turntable 4 in the horizontal direction. This limiting effect helps to ensure that the turntable 4 can move within a suitable position range during the detection process, neither damaging other parts of the mechanism due to excessive movement nor affecting the clamping and positioning effect of the brake disc due to insufficient movement. In addition to restricting the rotation angle of the turntable 4, the "L"-shaped limiting plate 12 also provides additional stability to the turntable 4 through its physical structure. Since the long side is located below the turntable 4 and cooperates with the limiting pin 14 and the limiting waist-shaped hole 13, it can resist the shaking or offset of the turntable 4 in the vertical direction to a certain extent. This stability is crucial for ensuring the precise positioning of the brake disc during the detection process, helping to reduce the measurement error caused by the shaking of the turntable 4 and improving the accuracy and reliability of the detection.

[0033] Please refer to Figure 6 、 Figure 7 As an embodiment of the present utility model, one side inner wall of the right-angled movable plate 11 is fixedly connected to the top end of the piston rod of the driving cylinder 9. The other side of the right-angled movable plate 11 is arranged on the side part of the cylinder body of the driving cylinder 9 and is arranged parallel to it. A limiting guide block 15 is fixedly installed on the side wall of the cylinder body of the driving cylinder 9. A slide rail 16 is provided on the side of the right-angled movable plate 11 close to the cylinder body of the driving cylinder 9. A limiting chute 17 is formed on the side of the slide rail 16 close to the driving cylinder 9. The limiting chute 17 is adapted to the limiting guide block 15.

[0034] In the above-described solution, one side inner wall of the right-angled movable plate 11 is fixedly connected to the top end of the piston rod of the driving cylinder 9, ensuring that the linear motion of the piston rod can be directly converted into the movement of the right-angled movable plate 11. The other side of the right-angled movable plate 11 is arranged parallel to the side of the cylinder block of the driving cylinder 9 to maintain a stable relative position. A limit guide block 15 is fixedly installed on the side wall of the cylinder block of the driving cylinder 9 to limit and guide the movement track of the right-angled movable plate 11. A slide rail 16 is provided on the side of the right-angled movable plate 11 close to the cylinder block of the driving cylinder 9. The accuracy and stability of the slide rail 16 are crucial for the smooth movement of the right-angled movable plate 11. A limit chute 17 is opened on the side of the slide rail 16 close to the driving cylinder 9. The limit chute 17 is adapted to the limit guide block 15 to ensure that the right-angled movable plate 11 can move along a predetermined track during the movement, preventing deviation or shaking. The precise cooperation between the limit guide block 15 and the limit chute 17 ensures the high-precision movement of the right-angled movable plate 11. The setting of the slide rail 16 and the limit guide block 15 enhances the stability of the right-angled movable plate 11 during the movement. By adjusting the stroke and speed of the driving cylinder 9, the movement range and speed of the right-angled movable plate 11 can be conveniently controlled. The limit guide block 15 and the limit chute 17 always maintain a tight fit to ensure the smooth, accurate and safe movement of the right-angled movable plate 11.

[0035] Further, control the driving cylinder 9 to start working. The piston rod starts to expand and contract under the action of air pressure or hydraulic pressure inside the cylinder. The expansion and contraction movement of the piston rod is transmitted to the right-angled movable plate 11 through the fixed connection, so that the slide rail 16 and the limit chute 17 provided on the right-angled movable plate 11 move along the length direction of the limit guide block 15, playing a role of guiding and limiting, and ensuring that the movement direction of the right-angled movable plate 11 is accurate and stable. Due to the precise cooperation between the limit guide block 15 and the limit chute 17, the right-angled movable plate 11 can achieve high-precision positioning and operation.

[0036] Please refer to Figure 4 、 Figure 7 As an embodiment of the present utility model, a driving block 18 is provided on the side of the right-angled movable plate 11 close to the driving cylinder 9. The lower end of the driving block 18 is fixedly connected to the right-angled movable plate 11. The upper end of the driving block 18 extends below the turntable 4. An activity groove 19 is opened above the driving block 18. A fixed plate 20 is provided at the lower end of the side of the turntable 4 close to the driving block 18. A cam follower 21 is provided at the lower end of the fixed plate 20. The cam follower 21 is arranged in the activity groove 19, and the outer side wall of the cam follower 21 is in rolling connection with the inner wall of the activity groove 19.

[0037] In the above-described solution, the right-angle movable plate 11 is a part of the main structure. One side of the right-angle movable plate 11 is provided with a driving block 18. The lower end of the driving block 18 is fixedly connected to the right-angle movable plate 11 to ensure the relative position stability between the two. The upper end of the driving block 18 extends below the turntable 4, and a movable groove 19 is opened above it. One lower side of the turntable 4 close to the driving block 18 is provided with a fixing plate 20 for installing and fixing the cam follower 21. The shape and size of the movable groove 19 match those of the cam follower 21 for accommodating and guiding the movement of the cam follower 21. The cam follower 21 is arranged at the lower end of the fixing plate 20 and is located within the movable groove 19. The outer sidewall of the cam follower 21 is in rolling connection with the inner wall of the movable groove 19. This connection method allows the cam follower 21 to freely roll within the movable groove 19 while maintaining close contact with the inner wall of the movable groove 19. The rolling connection between the cam follower 21 and the inner wall of the movable groove 19 reduces friction and wear, improving the accuracy and stability of the movement. By changing the shape and size of the movable groove 19, the movement trajectory and mode of the cam follower 21 can be flexibly adjusted to meet different process requirements.

[0038] Further, by placing the brake disc to be detected on the bearing tray 7, the lower edge position of the brake disc is inserted into the positioning hole 5 and contacts the positioning assembly 6 at this time. The driving cylinder 9 is started, and the piston rod of the driving cylinder 9 pushes the right-angle movable plate 11, so that the right-angle movable plate 11 drives the driving block 18 and the movable groove 19 thereon to move synchronously. Since the cam follower 21 is arranged within the movable groove 19 and is in rolling connection with the inner wall of the movable groove 19, when the movable groove 19 moves with the driving block 18, the cam follower 21 will roll along the inner wall of the movable groove 19. This rolling movement can be a linear movement or a curved movement, specifically depending on the shape of the movable groove 19 and the movement mode of the driving mechanism. During the rolling process, the cam follower 21 drives the fixing plate 20 on the turntable 4 to move, so that the fixing plate 20 drives the turntable 4 to rotate, and further drives the four groups of positioning assemblies 6 arranged above the turntable 4 to work synchronously. In this process, the crank 601 will rotate around its rotation axis with the turntable 4 to adapt to the position change of the positioning press block 602. At the same time, the positioning press block 602 will also swing on the crank 601 through the movable pin to further adjust its contact position and force with the brake disc. When the positioning press block 602 is in close contact with the brake disc and applies sufficient clamping force, the brake disc is stably clamped on the bearing tray 7. At this time, each component of the positioning assembly 6 is in a dynamic balance state, jointly maintaining the position stability of the brake disc. This uniform clamping force helps to center the brake disc at the geometric center of the bearing tray 7, thereby improving the accuracy of the detection.

[0039] Although the specific embodiments of the present utility model have been described above, those skilled in the art should understand that these are only illustrative examples, and the protection scope of the present utility model is defined by the appended claims. Without departing from the principle and essence of the present utility model, those skilled in the art can make various changes or modifications to these embodiments, but these changes and modifications all fall within the protection scope of the present utility model.

Claims

1. A centering mechanism for detecting the end run-out of a brake disc, comprising a bottom plate (1), wherein a support seat (2) is fixedly installed at the upper end of the bottom plate (1); characterized in that, A fixing plate (3) is provided at the upper end of the support base (2), and the fixing plate (3) is fixedly connected to the support base (2) by bolts; a rotating disc (4) is sleeved outside the fixing plate (3), and the rotating disc (4) is movably connected to the fixing plate (3), and positioning holes (5) are opened in the middle of both the rotating disc (4) and the fixing plate (3); four groups of positioning components (6) are equidistantly arranged along the circumferential direction at the upper end of the rotating disc (4), and the positioning components (6) are respectively movably connected to the rotating disc (4); a bearing tray (7) is provided at the upper end of the rotating disc (4), and the bearing tray (7) is fixedly connected to the rotating disc (4), and an avoidance groove (8) adapted to the positioning component (6) is opened inside the bearing tray (7); a driving cylinder (9) is provided on the support base (2), and the cylinder body of the driving cylinder (9) is fixedly connected to the lower end of the support base (2) through a fixed support (10); a right-angled movable plate (11) is provided at the top end of the piston rod of the driving cylinder (9), and one side edge of the right-angled movable plate (11) is movably connected to the rotating disc (4).

2. The centering mechanism for detecting the end runout of a brake disc according to claim 1, wherein The positioning component (6) includes a crank (601), one end of the crank (601) is movably connected to the rotating disc (4) through a rotating shaft, and a positioning press block (602) is movably connected to the other end of the crank (601); one end of the positioning press block (602) is hinged to the crank (601) through a movable pin, and a fixed block (603) is movably connected to the other end of the positioning press block (602); one end of the fixed block (603) is hinged to the positioning press block (602) through a movable pin, and the other end of the fixed block (603) is fixedly connected to the upper end of the fixing plate (3) by bolts.

3. A centering mechanism for detecting the end runout of a brake disc according to claim 1, characterized in that, An "L"-shaped limiting plate (12) is provided at the lower end of the fixing plate (3), the short side of the "L"-shaped limiting plate (12) is connected to the fixing plate (3) by bolts, and the long side of the "L"-shaped limiting plate (12) is arranged outside the fixing plate (3) and below the rotating disc (4).

4. A centering mechanism for detecting the end runout of a brake disc according to claim 3, characterized in that, A limiting waist-shaped hole (13) is opened along the length direction of the long side of the "L"-shaped limiting plate (12), and a limiting pin (14) adapted to the limiting waist-shaped hole (13) is provided at the lower end of the rotating disc (4); the limiting pin (14) is arranged in the limiting waist-shaped hole (13), and the limiting pin (14) can slide along the opening direction of the limiting waist-shaped hole (13).

5. A centering mechanism for detecting the end runout of a brake disc according to claim 1, characterized in that, One side inner wall of the right-angled movable plate (11) is fixedly connected to the top end of the piston rod of the driving cylinder (9), and the other side of the right-angled movable plate (11) is arranged on the side part of the cylinder body of the driving cylinder (9) and is parallel to it; a limiting guide block (15) is fixedly installed on the side wall of the cylinder body of the driving cylinder (9), and a sliding rail (16) is provided on one side of the right-angled movable plate (11) close to the cylinder body of the driving cylinder (9); a limiting sliding groove (17) is opened on one side of the sliding rail (16) close to the driving cylinder (9), and the limiting sliding groove (17) is adapted to the limiting guide block (15).

6. The centering mechanism for detecting the end runout of a brake disc according to claim 5, characterized in that, On one side of the right-angled movable plate (11) close to the driving cylinder (9), there is a driving block (18), and the lower end of the driving block (18) is fixedly connected to the right-angled movable plate (11); the upper end of the driving block (18) extends below the turntable (4), and an activity groove (19) is formed above the driving block (18).

7. A centering mechanism for detecting the end runout of a brake disc according to claim 1, characterized in that, On the lower end of one side of the turntable (4) close to the driving block (18), there is a fixed plate (20), and a cam follower (21) is arranged at the lower end of the fixed plate (20); the cam follower (21) is arranged in the activity groove (19), and the outer side wall of the cam follower (21) is in rolling connection with the inner wall of the activity groove (19).

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