Device for measuring surface runout of brake disc by using dynamic balancing machine

Abstract

The utility model relates to a device for measuring the surface runout of a brake disc by using a dynamic balancing machine, and relates to the technical field of measuring devices, the device comprises a connecting assembly and a measuring assembly, the connecting assembly comprises a connecting rod, the connecting rod is connected with the dynamic balancing machine, and the measuring assembly comprises a supporting rod, two measuring rods, an upper sensor and a lower sensor. The supporting rod is connected with the connecting rod, the two measuring rods are connected with the supporting rod and located on the same side of the supporting rod, a measuring area for measuring the brake disc is reserved between the two measuring rods, the upper sensor is connected with one measuring rod, the lower sensor is connected with the other measuring rod, and the upper sensor and the lower sensor are located on the same side of the supporting rod. The upper sensor and the lower sensor are located at the same height, light beams emitted by the upper sensor and the lower sensor are constant values, the upper sensor and the lower sensor can measure the thickness of the brake disc, and the brake disc thickness measuring device has the effect of improving operation complexity.

Description

Technical Field

[0001] The present application relates to the field of measuring device technology, and in particular to a device for measuring the surface runout of a brake disc using a dynamic balancing machine. Background Art

[0002] At present, brake pad testing is not only about examining the friction performance of brake pads, but also paying more and more attention to the environmental impact caused by the braking process. Therefore, the organic combination of brake pads and brake discs has become more and more important. During the testing process, the thickness change of the brake disc has become an indispensable and important item.

[0003] In the related technology, a comparative document with announcement number CN207570423U discloses a vernier caliper for measuring the thickness of a car brake disc, including a main scale, a vernier scale, and a lighting device. The main scale includes: a brake pad measurement reference, a brake disc measurement left claw, and a tire tread depth measurement reference. The vernier scale includes: a brake pad thickness measurement claw, a brake disc measurement right claw, a vernier starting position, a vernier, and a tire tread measurement claw, which can measure the thickness of the brake pad.

[0004] With respect to the above-mentioned related technologies, the brake disc can be measured by a vernier caliper. However, when the vernier caliper is used, it is necessary to align the vernier caliper with the measuring position on the brake disc and read the value manually. The operation is cumbersome and easily leads to errors. Utility Model Content

[0005] In order to improve the problem of complicated operation, the present application provides a device for measuring the surface runout of a brake disc using a dynamic balancing machine.

[0006] The present application provides a device for measuring the surface runout of a brake disc using a dynamic balancing machine, which adopts the following technical solution:

[0007] A device for measuring the surface runout of a brake disc using a dynamic balancing machine comprises a connecting assembly and a measuring assembly, wherein the connecting assembly comprises a connecting rod, and the connecting rod is connected to the dynamic balancing machine; the measuring assembly comprises a support rod, two measuring rods, an upper sensor and a lower sensor, the support rod is connected to the connecting rod, and the two measuring rods are both connected to the support rod and are located on the same side of the support rod, a measuring area for measuring the brake disc is reserved between the two measuring rods, the upper sensor is connected to one of the measuring rods, and the lower sensor is connected to the other measuring rod, the upper sensor and the lower sensor are located on the same side of the support rod, the upper sensor and the lower sensor are located at the same height, the light beams emitted by the upper sensor and the lower sensor are fixed values, and the upper sensor and the lower sensor can measure the thickness of the brake disc.

[0008] By adopting the above technical solution, when it is necessary to measure the thickness of the brake disc, first, connect the connecting rod to the dynamic balancing machine in advance, then connect the support rod to the connecting rod, and move the support rod close to the brake disc to be measured, so that the brake disc is located in the measuring area between the two measuring rods, and the upper sensor and the lower sensor are at the same height. According to the actual needs of the personnel, the light beams of the upper sensor and the lower sensor are adjusted to an appropriate length so that the brake disc is located between the upper sensor and the lower sensor. The upper sensor and the lower sensor can measure the brake disc. Compared with the relevant ones, the present application moves the support rod close to the brake disc to be measured, so that the brake disc is located in the measuring area between the two measuring rods, and the upper sensor and the lower sensor can measure the brake disc. The thickness of the brake disc can be measured by the upper sensor and the lower sensor, without manual measurement, which is convenient for reducing measurement errors and is beneficial to improving the problem of cumbersome operation.

[0009] Optionally, it also includes a fixing component and a driving component, the fixing component includes a fixing plate, the fixing plate is fixed to the dynamic balancing machine, the driving component includes a driving member and a rotating member, the driving member is connected to the fixing plate, the rotating member includes a connecting plate and a rotating rod, the connecting plate is connected to the fixing plate, the connecting plate and the fixing plate are vertically arranged, the connecting plate and the fixing plate form a placement area for placing the driving member, one end of the rotating rod is passed through the connecting plate, the axial direction of the rotating rod is vertically arranged to the connecting plate, the rotating rod is rotatably connected to the connecting plate, the driving member is connected to the rotating rod to drive the rotating rod to rotate, and the connecting rod is connected to the rotating rod at one end away from the support rod.

[0010] By adopting the above technical solution, when it is necessary to measure the brake disc, first, the position of the connecting rod should be adjusted, and the driving member should be started. The driving member drives the rotating rod to rotate. During the rotation of the rotating rod, the connecting rod rotates with the rotating rod. Through observation by personnel, the connecting rod can be brought close to the brake disc to be measured so that the brake disc is located in the measuring area between the two measuring rods, thereby measuring the thickness of the brake disc. By setting a fixing component and a driving component, it is convenient for personnel to adjust the position of the connecting rod so that the brake disc is located in the measuring area, which is further conducive to improving the problem of cumbersome operation.

[0011] Optionally, the connecting assembly also includes a connecting seat and a sliding member, the connecting seat is provided with an insertion hole, the rotating rod is inserted in the insertion hole at one end away from the fixed plate, the rotating rod is fixed to the connecting seat, the connecting seat is provided with a sliding hole at one end away from the insertion hole, the axial direction of the sliding hole is perpendicular to the axial direction of the insertion hole, the sliding hole passes through the connecting seat along its axial direction, the connecting rod passes through the sliding hole at one end away from the support rod, the connecting rod is slidably connected to the connecting seat, the connecting rod moves along the length direction of the connecting rod toward or away from the support rod, the sliding member is connected to the connecting seat, and the sliding member is used to fix or separate the connecting seat and the connecting rod.

[0012] By adopting the above technical solution, when it is necessary to move the position of the connecting rod, first, the connecting seat and the connecting rod are separated by the sliding member, and then, through observation by personnel, according to the actual situation, the connecting rod is moved toward or away from the support rod. At this time, the support rod moves synchronously with the connecting rod, so that the brake disc is located in the measuring area. After the connecting rod moves to a suitable position, the connecting seat and the connecting rod are fixed by the sliding member. By setting the connecting seat and the sliding member, it is further facilitated to move the position of the connecting rod, so that it is convenient to measure brake discs of different diameters and the brake disc is located in the measuring area.

[0013] Optionally, the upper sensor is slidably connected to the measuring rod, and the upper sensor moves toward or away from the lower sensor;

[0014] The measuring assembly further comprises an adjusting member, wherein the adjusting member is connected to the measuring rod, and the adjusting member is connected to the upper sensor to drive the upper sensor to move.

[0015] By adopting the above technical solution, when it is necessary to measure a thicker brake disc, the adjusting part is started to move the upper sensor toward the side away from the lower sensor, the light beams of the upper sensor and the lower sensor are kept at a constant value, the brake disc is in a suitable position, and the thickness of the brake disc is measured; when it is necessary to measure a thinner brake disc, the adjusting part is started to move the upper sensor toward the side close to the lower sensor, the brake disc is in a suitable position, and the brake disc is measured. By setting the adjusting part, it is easy to move the upper sensor, which is beneficial to measure brake discs of different thicknesses.

[0016] Optionally, the connecting seat is provided with an avoidance groove at the sliding hole, and the avoidance groove is arranged along the axial direction of the sliding hole. The sliding part is a fastening rod, which is located in the avoidance groove. The fastening rod and the avoidance groove have an interference fit, and the fastening rod extends into the sliding hole. The fastening rod contacts the connecting rod, and the fastening rod can fix or separate the connecting rod and the connecting seat.

[0017] By adopting the above technical solution, when the connecting rod needs to be moved, the personnel takes out the fastening rod from the avoidance groove to separate the fastening rod from the connecting rod. Then, the personnel adjusts the connecting rod to a suitable position through observation, and then inserts the fastening rod into the avoidance groove. At this time, the fastening rod extends into the sliding hole and can contact the connecting rod. The fastening rod fixes the connecting rod and the connecting seat. By setting the fastening rod, the personnel only needs to move the fastening rod to fix or separate the connecting rod and the connecting seat, which is convenient for personnel to operate.

[0018] Optionally, the adjusting member includes an adjusting plate and an adjusting screw, the adjusting plate is slidably connected to the measuring rod connected to the upper sensor, the adjusting plate moves toward or away from the lower sensor, the upper sensor is fixed to the adjusting plate, the adjusting screw is passed through the measuring rod connected to the upper sensor, and the adjusting screw is used to fix the measuring rod and the adjusting plate.

[0019] By adopting the above technical solution, when the upper sensor needs to be moved, the personnel screws the adjusting screw, which can separate the adjusting plate and the measuring rod. Then, the personnel moves the upper sensor toward or away from the lower sensor. When the upper sensor moves to the appropriate position, the personnel screws the adjusting screw in the opposite direction, which can fix the measuring rod and the adjusting plate. By setting the adjusting plate and the adjusting screw, the personnel only needs to screw the adjusting screw to move the upper sensor, which is convenient for personnel to operate.

[0020] Optionally, the rotating member also includes a fixed cylinder and at least one bearing, a rotating hole is opened on one side of the connecting plate near the top, the rotating hole penetrates the connecting plate along the thickness direction of the connecting plate, the fixed cylinder passes through the rotating hole, the fixed cylinder is fixed to the connecting plate, both ends of the fixed cylinder are opened, the bearing is coaxially fixed in the fixed cylinder, the rotating rod passes through the fixed cylinder and the inner ring of the bearing, and the rotating rod is fixed to the inner ring of the bearing.

[0021] By adopting the above technical solution, when the connecting rod needs to rotate, the driving member drives the rotating rod to rotate. At this time, the connecting rod rotates with the rotating rod. During the rotation of the rotating rod, the bearing also rotates with the rotating rod. By setting the bearing, on the one hand, it is helpful to reduce the wear of the rotating rod and the connecting rod due to rotation; on the other hand, it is convenient for the rotating rod to rotate.

[0022] Optionally, the rotating member also includes two protective plates, one of which is close to one end of the fixed tube, the protective plate is fixed to the fixed tube, the protective plate closes the opening of the fixed tube, the rotating rod passes through the protective plate, and the rotating rod is rotatably connected to the protective plate.

[0023] By adopting the above technical solution and providing a protective plate, the protective plate can close the opening of the fixed tube, which is helpful to reduce the situation where dust enters the fixed tube.

[0024] In summary, the present application includes at least one of the following beneficial technical effects:

[0025] 1. Compared with the related art, the present invention places the support rod close to the brake disc to be measured, so that the brake disc is located in the measuring area between the two measuring rods. The thickness of the brake disc can be measured by the upper sensor and the lower sensor, without manual measurement, which is convenient for reducing measurement errors and is conducive to improving the problem of cumbersome operation;

[0026] 2. By setting up the fixing components and the driving components, it is convenient for personnel to adjust the position of the connecting rod so that the brake disc is located in the measuring area, which is further conducive to improving the problem of cumbersome operation;

[0027] 3. By setting the adjustment plate and the adjustment screw, personnel only need to turn the adjustment screw to move the upper sensor, which is convenient for personnel to operate. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 Schematic diagram of the overall structure of this embodiment;

[0029] Figure 2 is a cross-sectional view of the rotating member in this embodiment;

[0030] Figure 3 is a schematic diagram of the structure of the connection component in this embodiment;

[0031] Figure 4 yes Figure 3 A magnified view of middle;

[0032] Figure 5 is a schematic diagram of the structure of the measuring component in the first viewing angle in this embodiment;

[0033] Figure 6 is a schematic diagram of the structure of the measuring component in the second viewing angle in this embodiment;

[0034] Figure 7 yes Figure 6 Enlarged view of B.

[0035] Explanation of the accompanying drawings: 1. Fixing assembly; 11. Fixing plate; 12. Fixing screw; 2. Driving assembly; 21. Driving seat; 22. Driving member; 23. Rotating member; 231. Connecting plate; 2311. Rotating hole; 232. Fixing cylinder; 233. Bearing; 234. Protective plate; 235. Rotating rod; 236. Rotating seat; 3. Connecting assembly; 31. Connecting seat; 311. Insertion hole; 312. Sliding hole; 313. Avoidance groove; 32. Connecting rod; 321. Placement groove; 33. Sliding member; 4. Measuring assembly; 41. Support rod; 42. Measuring rod; 421. Sliding groove; 422. Sliding groove; 43. Upper sensor; 44. Lower sensor; 45. Adjusting member; 451. Adjusting plate; 452. Adjusting screw; 5. Brake disc. DETAILED DESCRIPTION

[0036] The following is combined with Figure 1-7 This application is described in further detail.

[0037] The present application embodiment discloses a device for measuring the surface runout of a brake disc using a dynamic balancing machine. Figure 1 A device for measuring the surface runout of a brake disc using a dynamic balancing machine includes a fixing component 1, a driving component 2, a connecting component 3 and a measuring component 4, wherein the driving component 2 is arranged on the fixing component 1, the connecting component 3 is connected to the driving component 2, and the measuring component 4 is arranged on the connecting component 3.

[0038] Reference Figure 1 The fixing assembly 1 includes a fixing plate 11 and a plurality of fixing screws 12. In the present embodiment, the fixing plate 11 is a rectangular plate, the fixing plate 11 is vertically arranged, and the plurality of fixing screws 12 are all located on the fixing plate 11. In the present embodiment, the number of the fixing screws 12 is four, and the four fixing screws 12 are arranged in a matrix. The fixing screws 12 are passed through the fixing plate 11 and are threadedly connected to the dynamic balancing machine. The fixing screws 12 are threadedly connected to the fixing plate 11.

[0039] Reference Figure 1 and Figure 2 The driving assembly 2 includes at least one driving seat 21, a driving member 22 and a rotating member 23. In the present embodiment, there are two driving seats 21, and a driving gap is left between the two driving seats 21. The driving seat 21 is located on the fixed plate 11, and the two driving seats 21 are welded to the fixed plate 11. The driving member 22 is located in the driving gap. In the present embodiment, the driving member 22 is preferably a cylinder, the cylinder is vertically arranged, and the axial direction of the piston rod of the cylinder is arranged parallel to the fixed plate 11. The cylinder body of the cylinder is fixedly connected to the driving seat 21 by screws, and the piston rod of the cylinder is connected to the rotating member 23.

[0040] Reference Figure 1 and Figure 2The rotating member 23 includes a connecting plate 231, a fixing cylinder 232, at least one bearing 233, two protective plates 234, a rotating rod 235 and a rotating seat 236. The connecting plate 231 is vertically arranged. The connecting plate 231 is located on one of the side walls of the fixing plate 11 arranged in the vertical direction. The connecting plate 231 is fixedly connected to the fixing plate 11 by screws. The connecting plate 231 and the fixing plate 11 form a placement area. The cylinder is located in the placement area. A rotating hole 2311 is opened on one side of the connecting plate 231 near the top. The rotating hole 2311 penetrates the connecting plate 231 along the thickness direction of the connecting plate 231. The fixing cylinder 232 is horizontally arranged. The fixing cylinder 232 passes through the rotating hole 2311, and the fixing cylinder 232 is coaxially arranged with the rotating hole 2311. The fixing cylinder 232 is welded Connected to the connecting plate 231, both ends of the fixed cylinder 232 are opened. In the present embodiment, there are three bearings 233, which are all located in the fixed cylinder 232, and the bearings 233 are coaxially arranged with the fixed cylinder 232. The three bearings 233 are arranged along the axial direction of the fixed cylinder 232, and the outer ring of the bearing 233 is welded to the fixed cylinder 232. A protective plate 234 is close to one end of the fixed cylinder 232. The protective plate 234 can be fixedly connected to the fixed cylinder 232 by screws, or connected to the fixed cylinder 232 by welding. In the present embodiment, the protective plate 234 is fixedly connected to the fixed cylinder 232 by screws, and the protective plate 234 closes the opening of the fixed cylinder 232. The protective plate 234 can reduce the situation where dust enters the fixed cylinder 232.

[0041] Reference Figure 1 and Figure 2 The rotating rod 235 is arranged horizontally, and one end of the rotating rod 235 is successively penetrated through one of the protective plates 234, the inner rings of three bearings 233 and another protective plate 234, the rotating rod 235 is rotatably connected to the protective plate 234, the rotating rod 235 is welded to the inner ring of the bearing 233, the rotating seat 236 is located on the side of the rotating rod 235 close to the fixed plate 11, the rotating seat 236 is welded to the rotating rod 235, the piston rod of the cylinder is hinged to the rotating seat 236, the cylinder can push the rotating seat 236 to rotate, thereby driving the rotating rod 235 to rotate.

[0042] Reference Figure 2 , Figure 3 and Figure 4The connecting assembly 3 is located at the end of the rotating rod 235 away from the fixed plate 11. The connecting assembly 3 includes a connecting seat 31, a connecting rod 32 and a sliding member 33. The connecting seat 31 is provided with an insertion hole 311. The end of the rotating rod 235 away from the connecting plate 231 is penetrated in the penetration hole 311. The rotating rod 235 is welded to the connecting seat 31. The connecting seat 31 rotates synchronously with the rotating rod 235. The end of the connecting seat 31 away from the penetration hole 311 is provided with a sliding hole 312, and the axial direction of the sliding hole 312 is perpendicular to the axial direction of the penetration hole 311. The sliding hole 312 penetrates the connecting seat 31 along its axial direction. The connecting rod 32 is One end passes through the sliding hole 312, and the other end is connected to the measuring component 4. The connecting rod 32 is slidably connected to the connecting seat 31, and the connecting rod 32 can slide along the axial direction of the sliding hole 312. The connecting seat 31 is provided with an avoidance groove 313 at the sliding hole 312, and the avoidance groove 313 is arranged along the axial direction of the sliding hole 312. The sliding member 33 is a fastening rod, which is located in the avoidance groove 313, and the fastening rod and the avoidance groove 313 are interference fit. The fastening rod is located in the avoidance groove 313, and the fastening rod can extend into the sliding hole 312. The fastening rod contacts the connecting rod 32, and the fastening rod can fix the connecting rod 32 and the connecting seat 31.

[0043] Reference Figure 5 , Figure 6 and Figure 7 The measuring assembly 4 includes a support rod 41, two measuring rods 42, an upper sensor 43, a lower sensor 44 and an adjusting member 45. A placement groove 321 is provided at one end of the connecting rod 32 away from the connecting seat 31. The support rod 41 is located in the placement groove 321. The support rod 41 is horizontally arranged. The axial direction of the support rod 41 is perpendicular to the axial direction of the connecting rod 32. The support rod 41 is fixedly connected to the connecting rod 32 by screws. The two measuring rods 42 are both located on the side of the support rod 41 away from the connecting seat 31. The two measuring rods 42 are both horizontally arranged. The two measuring rods 42 are arranged in parallel. The axial direction of the measuring rod 42 is perpendicular to the axial direction of the support rod 41. The measuring rod 42 and the support rod 41 are integrated. 2, a measuring area for measuring the brake disc 5 is reserved, wherein the upper sensor 43 is located at the top of one of the measuring rods 42, the lower sensor 44 is located at the top of the other measuring rod 42, the upper sensor 43 and the lower sensor 44 are located on the same side of the support rod 41, the lower sensor 44 is fixedly connected to the measuring rod 42 by screws, the upper sensor 43 is slidably connected to the measuring rod 42, and the upper sensor 43 can move toward or away from the lower sensor 44; the upper sensor 43 and the lower sensor 44 are located at the same height, the upper sensor 43 and the lower sensor 44 can measure the thickness of the brake disc 5, the light beams of the upper sensor 43 and the lower sensor 44 are fixed, and the light beams of the upper sensor 43 and the lower sensor 44 are maintained at a length of 20 cm.

[0044] Reference Figure 6 and Figure 7 The adjusting member 45 is located on the measuring rod 42 connected to the upper sensor 43. In this embodiment, the adjusting member 45 includes an adjusting plate 451 and an adjusting screw 452. A sliding groove 421 is provided on the top of the measuring rod 42 connected to the upper sensor 43. The sliding groove 421 is set from one measuring rod 42 to another measuring rod 42. The adjusting plate 451 is located in the sliding groove 421. The side wall of the adjusting plate 451 fits with the side wall of the sliding groove 421. The adjusting plate 451 can slide in the sliding groove 421 along the axial direction of the support rod 41. The sensor 43 is fixedly connected to the adjusting plate 451 by screws. The measuring rod 42 connected to the upper sensor 43 is provided with a sliding groove 422 at the bottom of the sliding groove 421. The setting direction of the sliding groove 422 is consistent with the setting direction of the sliding groove 421. The sliding groove 422 penetrates the measuring rod 42 along a direction perpendicular to the axis of the measuring rod 42. The adjusting screw 452 is located at the bottom of the measuring rod 42. The adjusting screw 452 is penetrated through the sliding groove 422 and is threadedly connected to the adjusting plate 451. The adjusting screw 452 can fix the measuring rod 42 and the adjusting plate 451.

[0045] The implementation principle of the device for measuring the surface runout of a brake disc using a dynamic balancing machine in an embodiment of the present application is as follows: when the thickness of the brake disc 5 needs to be measured, first, the drive component 2 is started. The drive component 2 can drive the connecting rod 32 in the connecting component 3 to rotate. Through observation by personnel, when the connecting rod 32 rotates to a suitable position, the drive component 2 is turned off. Subsequently, the personnel removes the sliding part 33, thereby adjusting the position of the connecting rod 32, so that the brake disc 5 can be located in the measuring area, and the thickness of the brake disc 5 is measured by the upper sensor 43 and the lower sensor 44.

[0046] When the brake disc 5 needs to be located in the measuring area, the cylinder is started, and the cylinder drives the rotating seat 236 to rotate. During the rotation of the rotating seat 236, the rotating rod 235 rotates synchronously with the rotating seat 236. At this time, the connecting seat 31 drives the connecting rod 32 to rotate, and the upper sensor 43 and the lower sensor 44 rotate with the connecting rod 32. Through personnel observation, until the upper sensor 43 and the lower sensor 44 are close to the brake disc 5 where the measuring rod 42 is required, the fastening rod is removed, the position of the connecting rod 32 is adjusted, and the connecting rod 32 is fixed and then driven by the cylinder, which can drive the upper sensor 43 and the lower sensor 44 to move, so that the brake disc 5 is located in the measuring area and the thickness of the brake disc 5 is measured.

[0047] The above are all preferred embodiments of the present application, and the protection scope of the present application is not limited thereto. Therefore, any equivalent changes made according to the structure, shape, and principle of the present application should be included in the protection scope of the present application.

Claims

1. A device for measuring the surface runout of a brake disc using a dynamic balancing machine, characterized in that: The invention comprises a connecting component (3) and a measuring component (4), wherein the connecting component (3) comprises a connecting rod (32), wherein the connecting rod (32) is connected to a dynamic balancing machine, and the measuring component (4) comprises a supporting rod (41), two measuring rods (42), an upper sensor (43) and a lower sensor (44), wherein the supporting rod (41) is connected to the connecting rod (32), and the two measuring rods (42) are both connected to the supporting rod (41) and are located on the same side of the supporting rod (41), and a space for the brake disc (5) is left between the two measuring rods (42). ) is measured in a measuring area, the upper sensor (43) is connected to one of the measuring rods (42), the lower sensor (44) is connected to the other measuring rod (42), the upper sensor (43) and the lower sensor (44) are located on the same side of the support rod (41), the upper sensor (43) and the lower sensor (44) are located at the same height, the light beams emitted by the upper sensor (43) and the lower sensor (44) are fixed values, and the upper sensor (43) and the lower sensor (44) can measure the thickness of the brake disc (5).

2. The device for measuring the surface runout of a brake disc using a dynamic balancing machine according to claim 1, characterized in that: The invention also comprises a fixing assembly (1) and a driving assembly (2), wherein the fixing assembly (1) comprises a fixing plate (11), wherein the fixing plate (11) is fixed to the dynamic balancing machine, and the driving assembly (2) comprises a driving member (22) and a rotating member (23), wherein the driving member (22) is connected to the fixing plate (11), and the rotating member (23) comprises a connecting plate (231) and a rotating rod (235), wherein the connecting plate (231) is connected to the fixing plate (11), wherein the connecting plate (231) is vertically arranged to the fixing plate (11), and wherein the connecting plate (231) is vertically arranged to the fixing plate (11). 1) and the fixing plate (11) form a placement area for placing the driving member (22), one end of the rotating rod (235) is passed through the connecting plate (231), the axial direction of the rotating rod (235) is perpendicular to the connecting plate (231), the rotating rod (235) is rotatably connected to the connecting plate (231), the driving member (22) is connected to the rotating rod (235) to drive the rotating rod (235) to rotate, and the connecting rod (32) is connected to the rotating rod (235) at one end away from the supporting rod (41).

3. The device for measuring the surface runout of a brake disc using a dynamic balancing machine according to claim 2, characterized in that: The connecting assembly (3) further comprises a connecting seat (31) and a sliding member (33), wherein the connecting seat (31) is provided with a penetration hole (311), the end of the rotating rod (235) away from the fixing plate (11) is penetrated through the penetration hole (311), the rotating rod (235) is fixed to the connecting seat (31), the end of the connecting seat (31) away from the penetration hole (311) is provided with a sliding hole (312), the axial direction of the sliding hole (312) is perpendicular to the axial direction of the penetration hole (311), and the sliding hole (312) is provided with a sliding hole (312) and a sliding hole (312) disposed on the connecting seat (311). 312) passes through the connecting seat (31) along its axial direction, the connecting rod (32) passes through the sliding hole (312) at one end away from the support rod (41), the connecting rod (32) is slidably connected to the connecting seat (31), the connecting rod (32) moves toward or away from the support rod (41) along the length direction of the connecting rod (32), the sliding member (33) is connected to the connecting seat (31), and the sliding member (33) is used to fix or separate the connecting seat (31) and the connecting rod (32).

4. The device for measuring the surface runout of a brake disc using a dynamic balancing machine according to claim 1, characterized in that: The upper sensor (43) is slidably connected to the measuring rod (42), and the upper sensor (43) moves toward or away from the lower sensor (44); The measuring assembly (4) further comprises an adjusting member (45), wherein the adjusting member (45) is connected to the measuring rod (42), and the adjusting member (45) is connected to the upper sensor (43) to drive the upper sensor (43) to move.

5. The device for measuring the surface runout of a brake disc using a dynamic balancing machine according to claim 3, characterized in that: The connecting seat (31) is provided with an avoidance groove (313) at the sliding hole (312), and the avoidance groove (313) is arranged along the axial direction of the sliding hole (312). The sliding member (33) is a fastening rod, and the fastening rod is located in the avoidance groove (313). The fastening rod and the avoidance groove (313) are interference fit, and the fastening rod extends into the sliding hole (312). The fastening rod contacts the connecting rod (32), and the fastening rod can fix or separate the connecting rod (32) and the connecting seat (31).

6. The device for measuring the surface runout of a brake disc using a dynamic balancing machine according to claim 4, characterized in that: The adjusting member (45) comprises an adjusting plate (451) and an adjusting screw (452); the adjusting plate (451) is slidably connected to the measuring rod (42) connected to the upper sensor (43); the adjusting plate (451) moves toward or away from the lower sensor (44); the upper sensor (43) is fixed to the adjusting plate (451); the adjusting screw (452) is passed through the measuring rod (42) connected to the upper sensor (43); and the adjusting screw (452) is used to fix the measuring rod (42) and the adjusting plate (451).

7. The device for measuring the surface runout of a brake disc using a dynamic balancing machine according to claim 2, characterized in that: The rotating member (23) further comprises a fixed cylinder (232) and at least one bearing (233); a rotating hole (2311) is provided on one side of the connecting plate (231) close to the top; the rotating hole (2311) penetrates the connecting plate (231) along the thickness direction of the connecting plate (231); the fixed cylinder (232) passes through the rotating hole (2311); the fixed cylinder (232) is fixed to the connecting plate (231); both ends of the fixed cylinder (232) are opened; the bearing (233) is coaxially fixed in the fixed cylinder (232); the rotating rod (235) passes through the fixed cylinder (232) and the inner ring of the bearing (233); the rotating rod (235) is fixed to the inner ring of the bearing (233).

8. The device for measuring the surface runout of a brake disc using a dynamic balancing machine according to claim 7, characterized in that: The rotating member (23) further comprises two protective plates (234), one of the protective plates (234) being close to one end of the fixed tube (232), the protective plates (234) being fixed to the fixed tube (232), the protective plates (234) closing the opening of the fixed tube (232), the rotating rod (235) passing through the protective plates (234), and the rotating rod (235) being rotatably connected to the protective plates (234).

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