A tool for measuring the runout of a rotating part

Abstract

The utility model discloses a kind of tool for measuring the runout of rotating parts, related to detection equipment field.The tool for measuring the runout of rotating parts, including test tool support, the test tool support is connected with equipment to be measured, multiple laser sensors are installed on the test tool support, the driving end of the equipment to be measured is connected with rotating part, and multiple the laser sensors are outside rotating part.The tool for measuring the runout of rotating parts, by test tool support, laser sensor is fixed on gearbox housing, the runout of rotating part can be measured in real time in the whole vehicle operation process.Test data can be directly corresponding with whole vehicle operation state signal, accurately reflect the runout characteristics of part under actual working condition, solve the problem that static measurement is disjointed with whole vehicle actual state.

Description

Technical Field

[0001] This utility model relates to the field of testing equipment technology, specifically a tooling for measuring the runout of rotating parts. Background Technology

[0002] During vehicle development and use, oil leaks frequently occur at the oil seals of rotating parts such as the gearbox output shaft and rear axle input shaft. Simultaneously, NVH (noise, vibration, and harshness) issues can arise due to the runout of rotating components in the transmission system. Analysis has shown that excessive runout of rotating parts is one of the key factors contributing to these problems.

[0003] Currently, OEMs rely on static measurements from parts suppliers to test the runout of rotating parts. This approach has significant limitations: firstly, static measurements do not consider the matching relationship between parts or the actual road conditions of the vehicle (such as uphill, downhill, and rough roads), leading to a significant difference between the measurement results and the actual runout of the parts in the vehicle; secondly, when prototype vehicles experience oil leaks or NVH issues, the relevant parts must be disassembled and sent to the supplier for testing, which is not only time-consuming, labor-intensive, and costly, but also delays the efficiency of problem investigation. Utility Model Content

[0004] To address the shortcomings of existing technologies, this utility model provides a tooling for measuring the runout of rotating parts, solving the problem that static measurement is significantly limited for testing the runout of rotating parts by various OEMs.

[0005] To achieve the above objectives, this utility model is implemented through the following technical solution: a tooling for measuring the runout of a rotating part, including a test tooling bracket, the test tooling bracket being connected to a device under test, a plurality of laser sensors being mounted on the test tooling bracket, the drive end of the device under test being connected to a rotating part, and the plurality of laser sensors being located on the outside of the rotating part.

[0006] Preferably, the rotating part is disposed through the test fixture bracket.

[0007] Preferably, the test fixture bracket is provided with multiple bolts between itself and the device under test, and the test fixture bracket is fixedly connected to the device under test by the multiple bolts.

[0008] Preferably, the device under test is a car transmission, and the rotating part is the transmission output shaft.

[0009] Preferably, the laser sensor laser source emits a laser beam, which is reflected off the surface of the rotating part to the laser sensor receiver.

[0010] Its beneficial effects are as follows: 1. This fixture for measuring the runout of rotating parts uses a test fixture bracket to fix a laser sensor to the gearbox housing, allowing for real-time measurement of the runout of rotating parts during vehicle operation. The test data directly corresponds to the vehicle's operating status signals, accurately reflecting the runout characteristics of parts under actual operating conditions. This solves the problem of the disconnect between static measurement and the actual state of the vehicle. It eliminates the need to disassemble parts and send them to the supplier for testing. Data is directly collected by the laser sensor and processed and analyzed using INCA software, quickly determining whether the runout exceeds the oil seal design limit. This directly correlates oil leaks, NVH faults, and runout, significantly shortening troubleshooting time and reducing costs.

[0011] 2. This fixture for measuring the runout of rotating parts features a high-strength test fixture bracket that is bolted to the gearbox housing. This ensures vibration-free operation under various vehicle operating conditions, preventing deformation or shaking of the fixture itself from affecting the measurement accuracy of the laser sensor and guaranteeing data stability and accuracy. This fixture is not only suitable for testing the gearbox output shaft but can also be extended to other rotating parts in the transmission system, such as transfer cases, drive shafts, front axles, and rear axles. It is applicable to various vehicle types, including SUVs, pickup trucks, and light trucks, making it widely applicable. Attached Figure Description

[0012] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0013] Figure 1 This is a schematic diagram of the overall structure of this utility model; Figure 2 This is a schematic diagram of the data processing of this utility model; Figure 3 This is a partial schematic diagram of the data processing of this utility model.

[0014] In the diagram: 1. Device under test; 2. Test fixture bracket; 3. Bolt; 4. Laser sensor; 5. Rotating part. Detailed Implementation

[0015] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions in the embodiments of this utility model are described clearly and completely. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0016] To better understand the above technical solutions, the following will provide a detailed explanation of the technical solutions in conjunction with the accompanying drawings and specific implementation methods.

[0017] This utility model discloses a tooling for measuring the runout of rotating parts, according to the attached... Figure 1 As shown, the device includes a test fixture 2, which is connected to a device under test 1. Multiple laser sensors 4 are mounted on the test fixture 2. The drive end of the device under test 1 is connected to a rotating part 5, and the multiple laser sensors 4 are located on the outside of the rotating part 5.

[0018] Furthermore, the rotating part 5 is set through the test fixture bracket 2.

[0019] Furthermore, multiple bolts 3 are provided between the test fixture bracket 2 and the device under test 1, and the test fixture bracket 2 is fixedly connected to the device under test 1 through the multiple bolts 3.

[0020] Furthermore, the device under test 1 is set as an automobile gearbox, and the rotating part 5 is set as the gearbox output shaft.

[0021] Furthermore, the laser sensor 4 emits a laser beam from the laser source, and the beam is reflected off the surface of the rotating part 5 to the receiver of the laser sensor 4.

[0022] The laser sensor 4 is fixed to the gearbox housing by the test fixture bracket 2, which allows for real-time measurement of the runout of the rotating part 5 during vehicle operation. The test data directly corresponds to the vehicle's operating status signal, accurately reflecting the runout characteristics of the part under actual working conditions. This solves the problem of the disconnect between static measurement and the actual state of the vehicle. There is no need to disassemble the part and send it to the supplier for testing. Data is directly collected by the laser sensor 4 and processed and analyzed by INCA software. This allows for rapid determination of whether the runout exceeds the oil seal design limit, directly linking oil leakage, NVH faults, and runout, significantly shortening troubleshooting time and reducing costs.

[0023] The test fixture bracket 2 features a high-strength design and is fixed to the gearbox housing with bolts 3, ensuring vibration-free operation under various vehicle operating conditions. This prevents deformation or shaking of the fixture itself from affecting the measurement accuracy of the laser sensor 4, guaranteeing data stability and accuracy. This fixture is not only suitable for testing the gearbox output shaft but can also be extended to other rotating parts 5 of the transmission system, such as the transfer case, drive shaft, front axle, and rear axle. It is applicable to various vehicle types, including SUVs, pickup trucks, and light trucks.

[0024] The collected data is a fluctuating curve, as shown below. Figure 2 As shown, some abrupt changes in fluctuations are not considered in the analysis. The maximum difference between adjacent peaks and troughs is taken as the fluctuation value, as shown in the appendix below. Figure 3 As shown.

[0025] Working principle: The laser sensor 4 is mounted on the test fixture bracket 2, and then the test fixture bracket is fixed to the gearbox housing with bolts 3. The test fixture bracket 2 must have sufficient strength to ensure no vibration during all operating conditions of the vehicle (such as rapid acceleration, rapid deceleration, driving on rough roads, etc.) to avoid interfering with the measurement of the laser sensor 4.

[0026] The laser source of laser sensor 4 emits a laser beam, which shines on the surface of the output shaft of the gearbox under test and is reflected back to the receiver of laser sensor 4. Based on the principle of optical reflection, laser sensor 4 calculates the real-time distance between the measured surface and the sensor by calculating the reflection path of the beam.

[0027] Laser sensor 4 is connected to the signal acquisition unit, and the acquired voltage signal is read through INCA software. Two CAN buses are created in the INCA software, and the vehicle DBC file and the device DBC file are added respectively, so that the vehicle operating status signal and the runout data of the transmission output shaft correspond in real time and achieve synchronous recording.

[0028] The raw voltage signal collected by laser sensor 4 is converted into a distance signal using the formula "Y=0.0025X+17.5" (where X is the raw voltage value and Y is the distance value).

[0029] The converted distance data is filtered to remove abnormal fluctuations, and the maximum difference between adjacent peaks and troughs is taken as the runout of the gearbox output shaft.

[0030] Results analysis: By comparing the calculated runout with the runout limit that the oil seal design can withstand, it can be determined whether the runout of the gearbox output shaft exceeds the standard, and thus determine whether it is the cause of oil leakage or NVH failure.

[0031] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0032] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claims. The scope of protection of this utility model is defined by the appended claims and their equivalents.

Claims

1. A fixture for measuring the runout of a rotating part, comprising a test fixture bracket (2), wherein the test fixture bracket (2) is connected to a device to be tested (1), characterized in that, Multiple laser sensors (4) are installed on the test fixture bracket (2). The drive end of the device under test (1) is connected to a rotating part (5), and the multiple laser sensors (4) are located on the outside of the rotating part (5).

2. The tooling for measuring the runout of a rotating part according to claim 1, characterized in that, The rotating part (5) is set through the test fixture bracket (2).

3. The tooling for measuring the runout of a rotating part according to claim 1, characterized in that, The test fixture bracket (2) is provided with multiple bolts (3) between it and the device under test (1), and the test fixture bracket (2) is fixedly connected to the device under test (1) by multiple bolts (3).

4. The tooling for measuring the runout of a rotating part according to claim 1, characterized in that, The device under test (1) is set as an automobile gearbox, and the rotating part (5) is set as the gearbox output shaft.

5. The tooling for measuring the runout of a rotating part according to claim 1, characterized in that, The laser source of the laser sensor (4) emits a laser beam, which is reflected on the surface of the rotating part (5) to the receiver of the laser sensor (4).

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