Brake disc concentricity and run-out degree detection tool
By designing a brake disc concentricity and runout detection fixture and utilizing the radial expansion and contraction functions of the clamping jaws, the problem of poor compatibility of detection instruments was solved and detection efficiency was improved.
Patent Information
- Application Number
- CN202423236594.4
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-27
- Publication Date
- 2025-09-09
- Estimated Expiration
- 2034-12-27
AI Technical Summary
Existing brake disc concentricity and runout testing instruments have poor compatibility, resulting in frequent replacement, increased testing procedures, and reduced work efficiency.
A brake disc concentricity and runout detection fixture was designed. By setting a clamping jaw on the reference seat of the workpiece fixture assembly and using the adjustment nut and rotating bearing to achieve radial expansion and contraction of the clamping jaw, it can adapt to the fixation of brake discs of different sizes.
There is no need to frequently replace the testing instrument, which improves the work efficiency of brake disc concentricity and runout testing.
Smart Images
Figure CN223319737U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the automotive field, in particular to a brake disc concentricity and runout detection jig. Background Art
[0002] With the rapid development of automotive technology, cars are achieving ever-increasing top speeds and stronger acceleration performance. This demands further improvements in braking performance, and the brake disc is a crucial component of the vehicle's braking system. A car's brake disc is a ring-shaped structure with an opening at its center. When the disc is attached to the wheel hub, friction between the disc and the wheel creates radial offset and runout during rotation, reducing braking efficiency and, in severe cases, damaging the vehicle's braking system and wheels. Therefore, brake discs must be inspected for concentricity and runout before leaving the factory.
[0003] However, the opening diameters of different brake discs are different. Due to the poor compatibility of current brake disc concentricity and runout testing instruments, only brake discs with a single center opening size can be placed on the testing instrument. In order to meet the concentricity and runout testing of brake discs with different opening diameters, the testing instrument needs to be frequently replaced, resulting in an increase in the number of steps in the brake disc concentricity and runout testing. Utility Model Content
[0004] In view of the shortcomings of the existing technology, the utility model provides a brake disc concentricity detection fixture.
[0005] The purpose of this utility model is achieved through the following solutions:
[0006] A brake disc concentricity and runout detection fixture comprises: an operating table, a measuring part and a workpiece clamp assembly, wherein the measuring part and the workpiece clamp assembly are respectively arranged on the operating table, and the measuring part is arranged on one side of the workpiece clamp assembly, the workpiece clamp assembly comprises a reference seat and a clamping assembly, and the reference seat is arranged on the operating table; the clamping assembly comprises an adjusting assembly, a clamping jaw and a bottom cover, the bottom cover is arranged on the reference seat, the clamping jaw is arranged on the bottom cover, the adjusting assembly is arranged on the clamping jaw, and when the adjusting assembly is rotated in a first direction, the clamping jaw expands radially, and when the adjusting assembly is rotated in a second direction, the clamping jaw contracts radially, the first direction is opposite to the second direction, and the measuring end of the measuring part is aligned with the clamping jaw.
[0007] In one embodiment, the adjusting assembly includes an adjusting nut and a rotating bearing, the adjusting nut is fixedly connected to the rotating bearing, the clamping jaw is sleeved outside the rotating bearing, and the rotating bearing is rotatably connected to the clamping jaw.
[0008] In one embodiment, the measuring part includes a support frame and a measuring assembly. The support frame is arranged on the operating table and is located on one side of the workpiece clamp assembly. The measuring assembly is installed on the support frame, and the measuring assembly can move up and down along the support frame and can rotate with the support frame as the central axis.
[0009] In one embodiment, the measuring assembly includes a fixing nut, a connecting arm and a measuring instrument. The fixing nut is movably connected to the connecting arm. The connecting arm is mounted on a support frame, and the connecting arm can move up and down along the support frame and can rotate around the support frame as the central axis. The measuring instrument is rotatably connected to the connecting arm, and the rotation axis of the measuring instrument is perpendicular to both the support frame and the connecting arm.
[0010] In one embodiment, the connecting arm includes a rotating disk and a rotating arm. The rotating disk is mounted on the support frame. The fixing nut is movably connected to the rotating disk. One end of the rotating arm is rotatably connected to the rotating disk. The rotating axis of the rotating arm is parallel to the support frame. The other end of the rotating arm is rotatably connected to the measuring instrument.
[0011] In one embodiment, the measuring instrument includes an instrument panel and a test head, wherein the instrument panel is fixedly connected to the test head, and the instrument panel is rotatably connected to one end of a rotary arm.
[0012] In one embodiment, a fixing piece is further included. A plurality of fixing holes are provided on the bottom cover. The plurality of fixing holes are provided around the edge of the bottom cover. The fixing piece is passed through the fixing hole. The bottom cover is fixedly connected to the reference seat through the fixing piece.
[0013] In one embodiment, a shock-absorbing layer is provided on the periphery of the bottom cover, and the shock-absorbing layer is provided on the reference seat. Compared with the prior art, the present invention has at least the following advantages:
[0014] The utility model provides a concentricity and runout detection fixture by arranging a clamping jaw on a reference seat of a workpiece clamp assembly, and controlling the radial expansion and radial contraction of the clamping jaw by adjusting the mutual cooperation of a nut and a rotary bearing, so that the clamping jaw can clamp brake discs with different sizes of circle centers, thereby eliminating the need to replace the workpiece clamp assembly for placing the brake disc, thereby improving work efficiency. BRIEF DESCRIPTION OF THE DRAWINGS
[0015] The drawings described herein are used to provide a further understanding of the present application and constitute a part of the present application. The illustrative embodiments of the present application and their descriptions are used to explain the present application and do not constitute an improper limitation on the present application. In the drawings:
[0016] Figure 1 This is a three-dimensional diagram of the brake disc concentricity detection fixture of the utility model;
[0017] Figure 2 for Figure 1 A three-dimensional diagram of the specific work;
[0018] Figure 3 for Figure 1 Schematic diagram of some structures in ;
[0019] Figure 4 for Figure 1 Cross-sectional view of the middle structure;
[0020] The reference numerals are: 1. operating table; 2. measuring unit; 21. support frame; 22. measuring assembly; 221. fixing nut; 222. connecting arm; 2221. rotating disk; 2222. rotating arm; 22221. rotating shaft; 223. measuring instrument; 2231. rotating shaft; 2232. instrument panel; 2233. test head;
[0021] 3. Workpiece fixture assembly; 31. Reference seat; 311. Shock-absorbing layer; 32. Clamping assembly; 321. Adjustment assembly, 3211. Adjustment nut; 3212. Rotary bearing; 322. Clamping jaws; 323. Bottom cover; 3231. Fixing hole; 324. Fixing piece; 4. Brake disc. DETAILED DESCRIPTION
[0022] The following diagrams illustrate various embodiments of the present invention. For clarity, many practical details will be included in the following description. However, it should be understood that these practical details are not intended to limit the present invention. In other words, in some embodiments of the present invention, these practical details are not essential. Furthermore, to simplify the drawings, some commonly used structures and components are depicted in simplified schematic form.
[0023] It should be noted that all directional indications such as up, down, left, right, front, back, etc. in the embodiments of the present invention are only used to explain the relative position relationship, movement status, etc. between the various components in a certain specific posture as shown in the accompanying drawings. If the specific posture changes, the directional indication will also change accordingly.
[0024] In addition, in the present invention, descriptions such as "first" and "second" are only used for descriptive purposes and do not specifically refer to the order or sequence, nor are they used to limit the present invention. They are only used to distinguish components or operations described with the same technical terms, and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one such feature. In addition, the technical solutions between the various embodiments can be combined with each other, but they must be based on the ability of ordinary technicians in this field to implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such a combination of technical solutions does not exist and is not within the scope of protection required by the present invention.
[0025] In order to further understand the content, features and effects of the present invention, the following embodiments are given as examples and described in detail with reference to the accompanying drawings:
[0026] like Figure 1 As shown, Figure 1 This is a stereoscopic diagram of a brake disc concentricity detection fixture. This embodiment provides a brake disc concentricity detection fixture, including: an operating table 1, a measuring part 2 and a workpiece fixture assembly 3. The measuring part 2 and the workpiece fixture assembly 3 are respectively arranged on the operating table 1, and the measuring part 2 is arranged on one side of the workpiece fixture assembly 3. The operating table 1 is used to fix the measuring part 2 and the workpiece fixture assembly 3. When performing concentricity measurement, Figure 2 As shown, the brake disc 4 is put on the workpiece clamp assembly 3, and the workpiece clamp assembly 3 can fix the brake disc 4 to prevent the brake disc 4 from moving. In specific work, the brake disc 4 has an upper surface, a lower surface and a peripheral wall. When measuring the concentricity of the brake disc, the measuring end of the measuring part 2 is aligned with the peripheral wall of the brake disc 4. When measuring the runout of the brake disc, the measuring end of the measuring part 2 is located on the upper surface of the brake disc 4.
[0027] Specifically, if Figure 1 As shown, the workpiece clamp assembly 3 includes a reference base 31 and a clamping assembly 32. The reference base 31 is mounted on the operating table 1, and the clamping assembly 32 is mounted on the reference base 31. The reference base 31 is mounted and fixed with the clamping assembly 32. The reference base 31 can be configured as a cylindrical structure. The clamping assembly 32 is used to secure the brake disc 4 to prevent it from falling off when the reference base 31 rotates. In this embodiment, the clamping assembly 32 can be a four-jaw outward-flaring chuck.
[0028] The clamping assembly 32 includes an adjustment assembly 321, a clamping jaw 322, and a bottom cover 323. The bottom cover 323 is mounted on the base 31, the clamping jaw 322 is mounted on the bottom cover 323, and the adjustment assembly 321 is mounted on the clamping jaw 322. Rotating the adjustment assembly 321 in a first direction causes the clamping jaw 322 to expand radially, while rotating the adjustment assembly 321 in a second direction causes the clamping jaw 322 to contract radially. The first direction is opposite to the second direction, and the measuring end of the measuring portion 2 is aligned with the clamping jaw 322. Alternatively, the first direction may be clockwise, and the second direction may be counterclockwise, or the first direction may be counterclockwise, and the corresponding second direction may be clockwise.
[0029] In testing work, such as Figure 2As shown, in this embodiment, the first direction is counterclockwise, and the second direction is clockwise. The brake disc 4 is placed on the clamping jaws 322. The adjusting assembly 321 is rotated in the first direction, causing the adjusting assembly 321 to expand the clamping jaws 322, which secure the brake disc 4. The measuring end of the measuring unit 2 is now aligned with a point A on the circumferential wall of the brake disc 4, which is mounted on the clamping jaws 322. The reference base 31 is then connected to a rotary motor and started. The rotary motor drives the reference base 31 to rotate, which in turn drives the bottom cover 323 to rotate. The bottom cover 323 then drives the clamping jaws 322 and the brake disc 4 secured by the clamping jaws 322 to rotate together. When monitoring concentricity, the measuring unit 2 detects the circumference of point A on the circumferential wall of the brake disc 4 after one rotation. Since the circumference of the outer diameter of the brake disc 4 itself is a fixed value, when the reference base 31 rotates one circle, if the measuring instrument detects that the circumference of point A on the circumferential wall of the brake disc 4 after one rotation is different from the circumference of the brake disc 4 itself, it means that the center of the circle of the brake disc 4 has shifted during rotation. Figure 1 As shown, the adjustment assembly 321 includes an adjustment nut 3211 and a rotating bearing 3212. The adjustment nut 3211 is fixedly connected to the rotating bearing 3212. The clamping jaw 322 is sleeved outside the rotating bearing 3212 and is rotatably connected to the rotating bearing 3212. When the adjustment nut 3211 is rotated in a first direction, i.e., counterclockwise, the clamping jaw 322 expands radially to secure the brake disc 4. When the adjustment nut 3211 is then rotated in a second direction, i.e., clockwise, the clamping jaw 322 contracts radially, thereby releasing the brake disc 4.
[0030] Specifically, if Figure 1 As shown, the measuring unit 2 includes a support frame 21 and a measuring assembly 22. The support frame 21 is mounted on the operating table 1 and is located on one side of the workpiece fixture assembly 3. The measuring assembly 22 is mounted on the support frame 21 and can move up and down along the support frame 21 and rotate about the support frame 21 as the central axis. Specifically, the measuring assembly 22 is mounted on the support frame 21 and can move up and down along the support frame 21 to adjust the height according to the size of the brake disc 4.
[0031] Specifically, if Figure 3 As shown, the measuring assembly 22 includes a fixing nut 221, a connecting arm 222 and a measuring instrument 223. The fixing nut 221 is movably connected to the connecting arm 222. The connecting arm 222 is mounted on the support frame 21, and the connecting arm 222 can move up and down along the support frame 21 and can rotate around the support frame 21 as the central axis; the measuring instrument 223 is rotatably connected to the connecting arm 222, and the measuring instrument rotation axis 2231 of the measuring instrument 223 is perpendicular to the support frame 21 and the connecting arm 222 at the same time.
[0032] Among them, the fixing nut 221 can adjust the connecting arm 222. When the measuring instrument 223 needs to be raised or lowered, the fixing nut 221 can be loosened, and the connecting arm 222 can be adjusted along the support frame 21 for height adjustment. The measuring instrument 223 connected to the connecting arm 222 will be synchronously adjusted to the appropriate height. When it is necessary to adjust the measuring angle of the measuring instrument 223, the connecting arm 222 can be rotated around the support frame 21 so that the measuring instrument 223 rotates to the appropriate angle, and finally the fixing nut 221 is adjusted so that the fixing nut 221 fixes the connecting arm 222. If it is necessary to adjust the measuring angle of the measuring instrument 223 along the height direction of the support frame 21, the measuring instrument 223 can be toggled so that the measuring instrument 223 rotates around the rotation axis 2231, that is, the angle of the measuring instrument 223 can be adjusted, so that the concentricity of the brake disc 4 can be measured more accurately.
[0033] Specifically, if Figure 3 As shown, the connecting arm 222 includes a rotating disk 2221 and a rotating arm 2222. The rotating disk 2221 is sleeved on the support frame 21. The fixing nut 221 is movably connected to the rotating disk 2221. One end of the rotating arm 2222 is rotationally connected to the rotating disk 2221, and the other end of the rotating arm 2222 is rotationally connected to the measuring instrument 223. Among them, the rotating disk 2221 can rotate circumferentially on the support frame 21 and can also move up or down along the support frame 21. One end of the rotating arm 2222 is rotationally connected to the rotating disk 2221 through a rotating shaft 22221. The rotating shaft 22221 is parallel to the support frame 21, so that the rotating arm 2222 can also rotate circumferentially around the rotating disk 2221, so that the measuring angle of the measuring instrument 223 can be better adjusted. The other end of the rotating arm 2222 is rotationally connected to the measuring instrument 223 through a rotating shaft 2231, so that the measuring instrument 223 can rotate around the rotating shaft 2231. Among them, as Figure 2 As shown, by rotating the measuring instrument 223 around the rotation axis 2231 , the test head 2233 can be aligned with point B on the upper surface of the brake disc 4 , thereby testing the runout of the brake disc 4 .
[0034] Specifically, if Figure 1 and Figure 3 As shown, the measuring instrument 223 includes an instrument panel 2231 and a test head 2232. The instrument panel 2231 is fixedly connected to the test head 2232. The instrument panel 2231 is rotatably disposed on one end of the rotary arm 2222 via a rotating shaft 2231. It should be noted that the measuring instrument 223 can use an electronic dial indicator or a mechanical dial indicator. In this embodiment, the measuring instrument uses a mechanical dial indicator.
[0035] Specifically, if Figure 1 and Figure 4As shown, the brake disc concentricity testing jig also includes a fixing member 324. The bottom cover 323 is also provided with a plurality of fixing holes 3231. The plurality of fixing holes 3231 are arranged around the edge of the bottom cover 323. The fixing members 324 are inserted into the fixing holes 3231. The bottom cover 323 is fixedly connected to the reference base 31 via fixing members 3232. The fixing members 324 are screws that are connected through the fixing holes 3231 to better secure the bottom cover 323 to the reference base 31.
[0036] Specifically, if Figure 4 As shown, a shock-absorbing layer 311 is provided on the periphery of the bottom cover 323, and the shock-absorbing layer 311 is provided on the reference seat 31. Since the brake disc 4 is too heavy, there will be vibration when the brake disc 4 is placed on the reference seat 31. Therefore, the shock-absorbing layer 311 is provided to reduce the vibration of the brake disc 4 when it is placed on the reference seat, thereby preventing damage to the reference seat 31.
[0037] During operation of the concentricity and runout testing fixture, the adjusting nut 3211 is first rotated counterclockwise to drive the rotating bearing 3212 to radially contract the clamping jaws 322, thereby placing the brake disc 4 on the reference base 31. The adjusting nut 3211 is then rotated clockwise to radially expand the rotating bearing 3212 to secure the brake disc 4. Once the brake disc 4 is secured to the reference base 31, the fixing nut 221 is rotated to allow the measuring instrument 223 to slide up and down along the support frame 21 to adjust the height of the measuring instrument 223 to the same height as the wall of the brake disc 4. Once the height of the measuring instrument 223 is aligned with the wall of the brake disc 4, the fixing nut 221 is rotated again to secure the height of the measuring instrument 223. This allows the test head 2233 of the measuring instrument 223 to align with point A on the wall of the brake disc 4, or for the test head 2233 to be tangent to point A. The reference base 31 is then connected to the rotating motor to rotate the reference base 31, thereby rotating the brake disc 4. The test head 2233 thus measures the length of point A on the peripheral wall of the brake disc 4 moving around one circle, and the length of point A moving around one circle is read out through the instrument panel 2232. Since the circumference of the peripheral wall of the brake disc 4 is a fixed value, the circumference of the movement of point A can be compared with the circumference of the peripheral wall of the brake disc 4, thereby completing the concentricity detection of the brake disc 4.
[0038] At the same time, the runout of the brake disc 4 can also be tested. The runout test method is the same as the concentricity test. It should be noted that the runout test requires the test head 2233 to be aligned with point B on the upper surface of the brake disc 4. Before the test, the distance from point B to the center of the brake disc 4 must be measured, and the standard circumference of point B around the brake disc 4 must be calculated. When the brake disc 4 rotates, the measuring instrument 223 measures the circumference of point B after one rotation and compares it with the standard circumference of point B around the brake disc 4, thereby testing the runout of the brake disc 4.
[0039] In summary, the concentricity and runout detection fixture of the present invention is configured by arranging a clamping jaw 322 on a reference seat 31 of a workpiece clamp assembly 3, and controlling the radial expansion and radial contraction of the clamping jaw 322 by adjusting the cooperation between the nut 3211 and the rotary bearing 3212, so that the clamping jaw 322 can clamp brake discs 4 with different sizes of center circles, thereby eliminating the need to replace the workpiece clamp assembly 3 on which the brake disc 4 is placed, thereby improving work efficiency during operation.
[0040] The above is merely an embodiment of the present invention and is not intended to limit the present invention. Those skilled in the art will appreciate that various modifications and variations of the present invention are possible. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of the present invention are intended to be within the scope of the claims of the present invention.
Claims
1. A brake disc concentricity and runout detection fixture, characterized in that: include: An operating table (1), a measuring part (2) and a workpiece clamp assembly (3), wherein the measuring part (2) and the workpiece clamp assembly (3) are respectively arranged on the operating table (1), and the measuring part (2) is arranged on one side of the workpiece clamp assembly (3), the workpiece clamp assembly (3) comprises a reference seat (31) and a clamping assembly (32), wherein the reference seat (31) is arranged on the operating table (1); the clamping assembly (32) comprises an adjusting assembly (321), a clamping claw (322) and a bottom cover (323), wherein the bottom cover (323) is provided on the reference seat (31), the clamping jaw (322) is provided on the bottom cover (323), the adjusting component (321) is provided on the clamping jaw (322), and when the adjusting component (321) is rotated in a first direction, the clamping jaw (322) is radially expanded, and when the adjusting component (321) is rotated in a second direction, the clamping jaw (322) is radially contracted, the first direction is opposite to the second direction, and the measuring end of the measuring part (2) is aligned with the clamping jaw (322).
2. The brake disc concentricity and runout detection jig according to claim 1, characterized in that: The adjusting assembly (321) comprises an adjusting nut (3211) and a rotating bearing (3212), wherein the adjusting nut (3211) is fixedly connected to the rotating bearing (3212), the clamping jaw (322) is sleeved outside the rotating bearing (3212), and the rotating bearing (3212) is rotatably connected to the clamping jaw (322).
3. The brake disc concentricity and runout detection jig according to claim 1, characterized in that: The measuring part (2) includes a support frame (21) and a measuring component (22), wherein the support frame (21) is arranged on the operating table (1) and is located on one side of the workpiece fixture component (3), and the measuring component (22) is installed on the support frame (21), and the measuring component (22) can move up and down along the support frame (21) and can rotate with the support frame (21) as the central axis.
4. The brake disc concentricity and runout detection jig according to claim 3, characterized in that: The measuring assembly (22) comprises a fixing nut (221), a connecting arm (222) and a measuring instrument (223); the fixing nut (221) is movably connected to the connecting arm (222); the connecting arm (222) is sleeved on the support frame (21), and the connecting arm (222) can move up and down along the support frame (21) and can rotate with the support frame (21) as the central axis; the measuring instrument (223) is rotatably connected to the connecting arm (222), and the measuring instrument rotation axis (2231) of the measuring instrument (223) is perpendicular to both the support frame (21) and the connecting arm (222).
5. The brake disc concentricity and runout detection jig according to claim 4, characterized in that: The connecting arm (222) comprises a rotating disk (2221) and a rotating arm (2222); the rotating disk (2221) is sleeved on the support frame (21); the fixing nut (221) is movably connected to the rotating disk (2221); one end of the rotating arm (2222) is rotationally connected to the rotating disk (2221); the rotating axis (22221) of the rotating arm (2222) is parallel to the support frame 21; and the other end of the rotating arm (2222) is rotationally connected to the measuring instrument (223).
6. The brake disc concentricity and runout detection jig according to claim 5, characterized in that: The measuring instrument (223) comprises an instrument panel (2232) and a test head (2233); the instrument panel (2232) is fixedly connected to the test head (2233); and the instrument panel (2232) is rotatably connected to one end of a rotary arm (2222).
7. The brake disc concentricity and runout detection jig according to claim 1, characterized in that: It also includes a fixing member (324), and the bottom cover (323) is provided with a plurality of fixing holes (3231). The plurality of fixing holes (3231) are arranged around the edge of the bottom cover (323), and the fixing member (324) is passed through the fixing holes (3231). The bottom cover (323) and the reference seat (31) are fixedly connected via the fixing member (324).
8. The brake disc concentricity and runout detection jig according to claim 1, characterized in that: A shock-absorbing layer (311) is provided on the periphery of the bottom cover (323), and the shock-absorbing layer (311) is provided on the reference seat (31).