A kind of brake disc end runout and thickness difference detection tool

Abstract

The utility model discloses a kind of brake disc end run-out and thick-thin difference detection tool, belong to brake disc geometric parameter detection field, a kind of brake disc end run-out and thick-thin difference detection tool, characterized by: including support assembly and detection assembly, the top end horizontal rotation of support assembly is provided with the brake disc to be detected, detection assembly includes adjustable support and the main dial gauge and auxiliary dial gauge on adjustable support are set, wherein the probe of main dial gauge and the probe of auxiliary dial gauge are all with the end surface side of brake disc to be detected. The above-mentioned kind of brake disc end run-out and thick-thin difference detection tool is used, and the efficient synchronous accurate detection of brake disc end run-out and thick-thin difference is realized.

Description

Technical Field

[0001] This utility model relates to the field of brake disc geometric parameter detection technology, and in particular to a tooling for detecting brake disc end runout and thickness difference. Background Technology

[0002] As the core load-bearing component of the automotive braking system, the brake disc's geometric precision parameters, such as end runout and thickness difference, directly determine the system's operational stability and braking performance. If the end runout exceeds the allowable range or the thickness difference does not meet design requirements, it will not only cause vibration and abnormal noise during braking, but may also lead to uneven brake wear and brake force attenuation, seriously threatening driving safety.

[0003] Currently, the industry generally relies on multiple independent testing devices to operate in steps for the detection of the above two parameters, or adopts a cumbersome manual positioning and testing process. This not only has the problems of low detection efficiency and high operating costs, but also the switching of multiple devices and the manual positioning process are prone to introducing errors, making it difficult to guarantee stable detection accuracy. Utility Model Content

[0004] The purpose of this invention is to provide a tooling for detecting brake disc end runout and thickness difference, thereby solving the aforementioned technical problems.

[0005] To achieve the above objectives, this utility model provides a brake disc end runout and thickness difference detection fixture, including a support assembly and a detection assembly. The top of the support assembly is horizontally rotatably mounted with the brake disc to be tested. The detection assembly includes an adjustable bracket and a main dial indicator and an auxiliary dial indicator mounted on the adjustable bracket. The probes of the main dial indicator and the auxiliary dial indicator are both in contact with the end face of the brake disc to be tested.

[0006] Preferably, the support assembly includes a base, a support column fixed to the top of the base, and a central positioning flange fixed to the top of the support column. The center of the central positioning flange protrudes outward to form a positioning column. The positioning column is adapted to the central hole of the brake disc to be tested, and there is a rotational allowance between the positioning column and the inner wall of the central hole of the brake disc to be tested. The brake disc to be tested is placed on the top of the center positioning flange, and the center hole of the brake disc to be tested is adapted to the positioning post.

[0007] Preferably, the adjustable bracket includes a fixed base, a vertical support shaft fixed to the top of the fixed base, a lifting bracket vertically slidably mounted on the vertical support shaft, and a telescopic bracket horizontally slidably mounted on the lifting bracket along the radial direction of the brake disc to be tested. One end of the telescopic bracket is detachably connected to an H-type mounting bracket, and the other two ends of the H-type mounting bracket are respectively connected to a main dial indicator and an auxiliary dial indicator. The main dial indicator and the auxiliary dial indicator are respectively placed on the upper and lower sides of the brake disc to be tested, and the probes of the main dial indicator and the auxiliary dial indicator are both facing the brake disc to be tested.

[0008] Preferably, the lifting bracket and the vertical support shaft, as well as the telescopic bracket and the lifting bracket, are positioned by locking screws.

[0009] Therefore, the beneficial effects of this utility model using the above-mentioned brake disc end runout and thickness difference detection fixture are as follows: 1. Improved testing efficiency: No need to use multiple devices for step-by-step testing. End runout (main dial indicator) and thickness difference (auxiliary dial indicator) testing can be completed simultaneously using the same tooling, saving time on equipment switching and repetitive operations, and adapting to the batch testing needs of brake discs; 2. Ensure testing accuracy: The support assembly is precisely matched with the center positioning flange through the center hole of the brake disc, and the adjustable bracket is fixed in position by locking screws after adjustment, avoiding positioning offset or bracket loosening during testing, reducing data errors and ensuring reliable test results; 3. Enhanced versatility: The adjustable bracket (lifting bracket + telescopic bracket) can be flexibly adjusted in height and horizontal direction to adapt to brake discs of different diameters and thicknesses, eliminating the need to design tooling separately for different models of brake discs and reducing usage costs; 4. Simplified operation process: The overall structure is simple. The test can be completed in just three steps: placing the brake disc, adjusting the bracket for fixation, and rotating the brake disc to read the data. No complicated debugging is required, which reduces the skill threshold for operators and improves the convenience of on-site operation.

[0010] The technical solution of this utility model will be further described in detail below with reference to the accompanying drawings and embodiments. Attached Figure Description

[0011] Figure 1 This is a structural schematic diagram from one perspective of the brake disc end runout and thickness difference detection fixture described in this utility model. Figure 2 This is a structural schematic diagram from another perspective of the brake disc end runout and thickness difference detection fixture described in this utility model; Figure 3 This is a schematic diagram of the support component of a brake disc end runout and thickness difference detection fixture according to the present invention.

[0012] Figure Labels 1. Support assembly; 11. Base; 12. Support column; 13. Center positioning flange; 131. Positioning column; 2. Detection assembly; 21. Fixed seat; 22. Telescopic bracket; 23. Lifting bracket; 24. Vertical support shaft; 25. H-type mounting bracket; 26. Main dial indicator; 27. Auxiliary dial indicator; 3. Brake disc to be tested. Detailed Implementation

[0013] To make the objectives, technical solutions, and advantages of the present utility model embodiments clearer, the present utility model embodiments will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present utility model embodiments and are not intended to limit the present utility model embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present utility model without creative effort are within the scope of protection of this application. Examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout.

[0014] It should be noted that the terms "comprising" and "having," and any variations thereof, are intended to cover non-exclusive inclusion, such as a process, method, system, product, or server that includes a series of steps or units, not necessarily limited to those steps or units explicitly listed, but may include other steps or units not explicitly listed or inherent to such process, method, product, or device.

[0015] The embodiments of this utility model will now be described in detail with reference to the accompanying drawings.

[0016] like Figures 1-3 As shown, a brake disc end runout and thickness difference detection fixture includes a support assembly 1 and a detection assembly 2. The top of the support assembly 1 is horizontally rotatably mounted with a brake disc 3 to be tested. The detection assembly 2 includes an adjustable bracket and a main dial indicator 26 and an auxiliary dial indicator 27 mounted on the adjustable bracket. The probes of the main dial indicator 26 and the auxiliary dial indicator 27 are both in contact with the end face of the brake disc 3 to be tested.

[0017] Specifically, the support assembly 1 includes a base 11, a support column 12 fixed to the top of the base 11, and a central positioning flange 13 fixed to the top of the support column 12. The center of the central positioning flange 13 protrudes outward to form a positioning column 131. The positioning column 131 is adapted to the center hole of the brake disc 3 to be tested, and there is a rotational allowance between the positioning column 131 and the inner wall of the center hole of the brake disc 3 to be tested. The top of the central positioning flange 13 is where the brake disc 3 to be tested is placed, and the center hole of the brake disc 3 to be tested is adapted to the positioning column 131.

[0018] The adjustable bracket includes a fixed base 21, a vertical support shaft 24 fixed to the top of the fixed base 21, a lifting bracket 23 vertically slidably mounted on the vertical support shaft 24, and a telescopic bracket 22 horizontally slidably mounted on the lifting bracket 23 along the radial direction of the brake disc 3 to be tested. One end of an H-type mounting bracket 25 is detachably connected to the telescopic bracket 22. The other two ends of the H-type mounting bracket 25 are respectively connected to a main dial indicator 26 and an auxiliary dial indicator 27. The main dial indicator 26 and the auxiliary dial indicator 27 are placed on the upper and lower sides of the brake disc to be tested, and the probes of the main dial indicator 26 and the auxiliary dial indicator 27 are both facing the brake disc to be tested.

[0019] The lifting bracket 23 and the vertical support shaft 24, as well as the telescopic bracket 22 and the lifting bracket 23, are all positioned by locking screws.

[0020] In this embodiment, the lifting bracket 23 is a vertical slider that is vertically slidably mounted on the vertical support shaft 24. A slide rail is fixed at the top of the vertical slider and facing the brake disc 3 to be tested. The telescopic bracket 22 includes a horizontal slider that is horizontally slidably mounted inside the slide rail. Positioning holes are provided on both the horizontal and vertical sliders. Two locking screws pass through the corresponding positioning holes and abut against the slide rail and the vertical support shaft 24 to achieve positioning. A U-shaped assembly block is fixed on the horizontal slider. The top of the U-shaped assembly block is detachably connected to the h-shaped mounting bracket 25 by bolts. Multiple mounting holes are linearly provided on the h-shaped mounting bracket 25 and on the mounting arms corresponding to the main dial indicator 26 and the auxiliary dial indicator 27, so as to facilitate the adjustment of the positions of the main dial indicator 26 and the auxiliary dial indicator 27 according to the specifications of the brake disc 3 to be tested.

[0021] Instructions for use: Step 1, Pre-treatment: Clean the center hole, end face, and thickness measurement area of ​​the brake disc 3 to be tested, removing oil, iron filings, and other impurities. Simultaneously check the pointer flexibility and zeroing accuracy of the main dial indicator 26 and auxiliary dial indicator 27, ensuring the probe is free of wear and the measurement stroke is normal, avoiding impurities or instrument malfunctions affecting the testing accuracy. Then, place the brake disc 3 to be tested stably on the top of the center positioning flange 13, ensuring precise alignment between the center hole of the brake disc and the positioning pin 131. The positioning pin 131 achieves coaxial centering of the brake disc, and the rotational allowance between the positioning pin 131 and the inner wall of the center hole ensures that the brake disc can rotate smoothly horizontally around the axis of the positioning pin 131, providing a stable reference for full-circumference testing.

[0022] The second step is to adjust the testing position according to the diameter and thickness specifications of the brake disc 3 to be tested: First, loosen the locking screw between the lifting bracket 23 (vertical slider) and the vertical support shaft 24, slide the vertical slider up and down along the vertical support shaft 24, and adjust the overall height of the main dial indicator 26 and the auxiliary dial indicator 27 so that they correspond to the testing surfaces on the upper and lower sides of the brake disc respectively. Use the locking screw to position the current position; then loosen the locking screw between the telescopic bracket 22 (horizontal slider) and the slide rail, slide the horizontal slider horizontally along the slide rail, and drive the H-type mounting bracket 25 to move radially along the brake disc so that the probes of the main and auxiliary dial indicators are initially aligned with the testing area of ​​the brake disc; if further fine-tuning of the spacing or radial position of the two dial indicators is required, the fixed point of the dial indicator on the mounting arm can be adjusted through the multiple linear mounting holes on the H-type mounting bracket 25 to ensure that it is compatible with the testing requirements of brake discs of different sizes.

[0023] Third, after completing the coarse adjustment of the position, finely adjust the probe direction of the main dial indicator 26 and the auxiliary dial indicator 27 respectively: make the probe of the main dial indicator 26 perpendicular to the end face of the brake disc (ensure that the probe movement direction is perpendicular to the end face of the brake disc to ensure the accuracy of end runout detection), and leave a pre-compression amount, and rotate the dial to make the pointer return to zero; at the same time, adjust the probe of the auxiliary dial indicator 27 so that it is perpendicular to the thickness detection point of the brake disc (the characteristic detection surface in the radial or circumferential direction of the brake disc can be selected), also leave an appropriate pre-compression amount and return to zero, to ensure that the probes of the two dial indicators are in close contact with the detection surface of the brake disc without any looseness.

[0024] Step 4: Slowly and evenly rotate the brake disc 3 to be tested horizontally around the axis of the positioning post 131 for one revolution (ensuring no axial movement of the brake disc during rotation): During the rotation, the main dial indicator 26 captures the axial runout changes of the brake disc end face in real time. The end runout values ​​at different circumferential positions are recorded by the swing of the dial pointer. The difference between the maximum and minimum readings of the pointer is the end runout error of the brake disc. At the same time, the auxiliary dial indicator 27 collects the thickness data of the brake disc at different radial or circumferential positions and records the thickness readings at each detection point. By calculating the maximum and minimum thickness differences between multiple detection points, the thickness difference parameter of the brake disc is obtained.

[0025] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of this utility model and not to limit it. Although the utility model has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can still be made to the technical solution of this utility model, and these modifications or equivalent substitutions cannot cause the modified technical solution to deviate from the spirit and scope of the technical solution of this utility model.

Claims

1. A fixture for detecting brake disc end runout and thickness difference, characterized in that: It includes a support assembly and a detection assembly. The top of the support assembly is horizontally rotatably mounted with a brake disc to be tested. The detection assembly includes an adjustable bracket and a main dial indicator and an auxiliary dial indicator mounted on the adjustable bracket. The probes of the main dial indicator and the auxiliary dial indicator are both in contact with the end face of the brake disc to be tested.

2. The brake disc end runout and thickness difference detection fixture according to claim 1, characterized in that: The support assembly includes a base, a support column fixed to the top of the base, and a central positioning flange fixed to the top of the support column. The center of the central positioning flange protrudes outward to form a positioning column. The positioning column is adapted to the central hole of the brake disc to be tested, and there is a rotational allowance between the positioning column and the inner wall of the central hole of the brake disc to be tested. The brake disc to be tested is placed on the top of the center positioning flange, and the center hole of the brake disc to be tested is adapted to the positioning post.

3. The brake disc end runout and thickness difference detection fixture according to claim 1, characterized in that: The adjustable bracket includes a fixed base, a vertical support shaft fixed to the top of the fixed base, a lifting bracket vertically slidable on the vertical support shaft, and a telescopic bracket horizontally slidable on the lifting bracket along the radial direction of the brake disc to be tested. One end of the telescopic bracket is detachably connected to an H-type mounting bracket, and the other two ends of the H-type mounting bracket are respectively connected to a main dial indicator and an auxiliary dial indicator. The main dial indicator and the auxiliary dial indicator are placed on the upper and lower sides of the brake disc to be tested, and the probes of the main dial indicator and the auxiliary dial indicator are both facing the brake disc to be tested.

4. The brake disc end runout and thickness difference detection fixture according to claim 3, characterized in that: The lifting bracket and the vertical support shaft, as well as the telescopic bracket and the lifting bracket, are all positioned by locking screws.

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