Motor bearing axial force testing device

Abstract

The utility model discloses a motor bearing axial force testing arrangement relates to motor testing technical field. Including pressing plate, pressing plate fixed bolt, adjusting gasket, support, sensor module, wire harness, controller, wherein, adjusting gasket set up on support, support and adjusting gasket are directly contacted with the bearing end face of being measured, be provided with the cylindrical hole on the support, and the sensor module is arranged on the cylindrical hole, the pressing plate is provided on the sensor module, and both ends of the pressing plate are provided with through -hole, and the pressing plate is fixed on the motor casing through the pressing plate fixed bolt, the sensor module is connected with controller through external wire harness. The new type is simple in structure, and the volume is small, and the actual axial force and axial displacement of motor bearing can be accurately and quickly measured.

Description

Technical Field

[0001] This utility model relates to the field of motor testing technology, and more specifically to a device for testing the axial force of motor bearings. Background Technology

[0002] Existing automotive electric drive transmission assemblies have bearings supporting both sides of the drive motor. However, unlike gear drives, the bearing stress on the motor rotor cannot be directly calculated using gear parameters. The motor rotor is affected by its own weight, the magnetic pull of the stator, and dynamic imbalance, making its operating conditions complex. The bearing stress cannot be directly obtained, and the stress on both bearings is difficult to analyze and calculate. CAE simulation cannot accurately perform this analysis, posing significant challenges to the selection, verification, and troubleshooting of motor bearings. Therefore, accurately calculating the axial force of motor bearings is a pressing problem for those skilled in the art. Utility Model Content

[0003] In view of this, the present invention provides a device for testing the axial force of motor bearings to solve the problems mentioned in the background art.

[0004] To achieve the above objectives, this utility model adopts the following technical solution: an axial force testing device for motor bearings, comprising a pressure plate, pressure plate fixing bolts, adjusting shims, a support, a sensor module, a wiring harness, and a controller; wherein, the adjusting shims are disposed on the support, and the support and adjusting shims are in direct contact with the end face of the bearing being tested; the support is provided with a cylindrical hole, and the sensor module is arranged on the cylindrical hole; the pressure plate is disposed on the sensor module, and through holes are provided at both ends of the pressure plate, and the pressure plate is fixed to the motor housing by the pressure plate fixing bolts; the sensor module is connected to the controller through an external wiring harness.

[0005] Preferably, the support is a disc-shaped structure with a clearance groove on its end face, the clearance groove being used to arrange wire harnesses.

[0006] Preferably, the thickness of the adjusting shim is adjusted according to the different motors being adapted.

[0007] Preferably, the sensor module includes a sensor base, a pressure head, and a pressure-sensitive sheet; the height of the pressure head protrudes 5mm beyond the sensor base.

[0008] Preferably, the pressure sensor is made of metal strain gauge material, and the deformation is measured by the change in resistance when the pressure sensor is subjected to force.

[0009] Preferably, the controller receives the deformation signal from the sensor module, calculates the bearing axial force and deformation, and obtains the measurement result.

[0010] As can be seen from the above technical solution, compared with the prior art, the present invention discloses a device for testing the axial force of motor bearings, which has the following beneficial technical effects: 1. It can accurately and quickly measure the actual axial force and axial displacement of motor bearings, provide axial force data, and then complete the bearing verification and selection and fault analysis; 2. The measuring device has a simple structure and small size, and can measure and record data dynamically in real time. Attached Figure Description

[0011] 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 embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on the provided drawings without creative effort.

[0012] Figure 1 This is a structural diagram of the device of this utility model; Figure 2 This is a structural diagram of the sensor module of this utility model; Figure 3 This is a flowchart of the testing method of this utility model. Detailed Implementation

[0013] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0014] This utility model discloses a device for testing the axial force of a motor bearing, such as... Figure 1 As shown, the device includes a pressure plate 1, pressure plate fixing bolts 2, adjusting shims 3, a support 4, a sensor module 5, a wiring harness 6, and a controller 7. The adjusting shims 3 are mounted on the support 4, and the support 4 and adjusting shims 3 directly contact the end face of the bearing being tested. The support 4 has a cylindrical hole on which the sensor module 5 is arranged. The sensor module 5 has a pressure plate 1 mounted on it, and both ends of the pressure plate 1 have through holes, typically two in number. The pressure plate 1 is fixed to the motor housing by the pressure plate fixing bolts 2. The sensor module 5 is connected to the controller 7 via the external wiring harness 6.

[0015] Furthermore, the support 4 has a disc-shaped structure, which can ensure all-round contact with the bearing end face; a clearance groove is provided on the end face, which is used to arrange the wire harness.

[0016] Furthermore, the thickness of the adjusting shim 3 can be adjusted according to the different motors being used. The thickness of the adjusting shim can be set to different levels, serving two purposes: firstly, it can be adapted to multiple motor products, making it highly adaptable; secondly, it can measure the axial force of the bearing under different bearing clearance conditions.

[0017] Furthermore, such as Figure 2 As shown, the sensor module 5 includes a sensor base 8, a pressure head 9, and a pressure sensor sheet 10; the height of the pressure head 9 protrudes 5mm beyond the sensor base.

[0018] The pressure sensor 10 uses a metal strain gauge material, typically a metal foil. When the pressure sensor 10 is subjected to force, it measures the deformation by the change in resistance.

[0019] This novel testing device can be directly bolted to the motor housing, reducing the influence of other test bench factors. The support and shims directly contact the end face of the bearing being tested, resulting in more accurate measurements. Axial force and axial displacement can be measured in real time on the controller while the motor is operating. Figure 3 As shown, the testing principle of the testing device is as follows: when working, the force of the bearing is transmitted to the adjusting shim and the support, and then the force is transmitted to the sensor. The pressure plate inside the sensor deforms, and then the deformation signal is transmitted to the controller. The force value and deformation amount are displayed by the algorithm to obtain the measurement result.

[0020] The various embodiments in this specification are described in a progressive manner, with each embodiment focusing on its differences from other embodiments. Similar or identical parts between embodiments can be referred to interchangeably. For the apparatus disclosed in the embodiments, since it corresponds to the method disclosed in the embodiments, the description is relatively simple; relevant parts can be referred to the method section.

[0021] The above description of the disclosed embodiments enables those skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A device for testing the axial force of a motor bearing, characterized in that, The device includes a pressure plate, pressure plate fixing bolts, adjusting shims, a support, a sensor module, a wiring harness, and a controller. The adjusting shims are mounted on the support, and the support and adjusting shims directly contact the end face of the bearing being tested. The support has a cylindrical hole on which the sensor module is arranged. The pressure plate is mounted on the sensor module, and through holes are provided at both ends of the pressure plate. The pressure plate is fixed to the motor housing by the pressure plate fixing bolts. The sensor module is connected to the controller via an external wiring harness.

2. The axial force testing device for motor bearings according to claim 1, characterized in that, The support is a disc-shaped structure with a clearance groove on its end face, which is used to arrange wire harnesses.

3. The axial force testing device for motor bearings according to claim 1, characterized in that, The thickness of the adjusting shim is adjusted according to the different motors being adapted.

4. The axial force testing device for motor bearings according to claim 1, characterized in that, The sensor module includes a sensor base, a pressure head, and a pressure-sensitive plate; the height of the pressure head protrudes 5mm from the sensor base.

5. The axial force testing device for motor bearings according to claim 4, characterized in that, The pressure sensor uses a metal strain gauge material, and the deformation is measured by the change in resistance when the pressure sensor is subjected to force.

6. The axial force testing device for motor bearings according to claim 1, characterized in that, The controller receives the deformation signal from the sensor module, calculates the axial force and deformation of the bearing, and obtains the measurement result.

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