Hub bearing bending fatigue testing machine

Abstract

A wheel hub bearing bending fatigue testing machine disclosed by the present invention comprises a test pedestal, a driving motor support, a driving motor and a test tool, the driving motor support spans over the test pedestal, a driving motor body is fixedly installed on the driving motor support and is located above the test pedestal, a rotating shaft is vertically downward, and the driving motor body is connected with the test tool. The test tool is installed on a rotating shaft of the driving motor, and a to-be-tested bearing is installed below the test tool and clamped between the test tool and the test base. The hub bearing bending fatigue testing device is simple and reasonable in structure, through specific structural arrangement, bending fatigue testing can be conveniently conducted on a hub bearing, operation is convenient and fast, the performance of the hub bearing in the bending fatigue state can be effectively tested, detection efficiency and accuracy are improved, and a reliable means is provided for quality detection of the hub bearing.

Description

Technical Field

[0001] The invention relates to a testing device, and more particularly to a wheel hub bearing bending fatigue testing machine. Background Art

[0002] With the development of my country's economy, automobiles have become the main means of transportation for short-distance travel. High safety and high stability are the most basic and important indicators of automobile operation. The performance of automobile wheel hub bearings is directly related to the safety performance of automobile operation. Therefore, the performance of the bearings should be tested and evaluated in advance according to the operating conditions of the bearings. Only products that have passed the sampling test and verified the contract can be installed and used. However, there is no equipment in the existing technology that can test the rotational bending fatigue of wheel hub bearings well. Summary of the invention

[0003] In view of the shortcomings of the prior art, the object of the present invention is to provide a wheel hub bearing bending fatigue testing machine that can effectively test the rotational bending fatigue of the wheel hub bearing.

[0004] A wheel hub bearing bending fatigue testing machine comprises a test base, a drive motor bracket, a drive motor and a test fixture, wherein the drive motor bracket spans above the test base, the body of the drive motor is fixedly mounted on the drive motor bracket and is above the test base, the rotating shaft is arranged vertically downward, the test fixture is mounted on the rotating shaft of the drive motor, and the bearing to be tested is mounted below the test fixture and clamped between the test fixture and the test base.

[0005] As a further improvement of the present invention, the test base includes a test bench, a base plate and a plurality of flexible feet, wherein the plurality of flexible feet are fixedly mounted on the base plate and distributed in a circle, the lower end of the test bench is fixedly mounted on the flexible feet, and the upper end serves as a test table surface to cooperate with the test tooling.

[0006] As a further improvement of the present invention, the drive motor bracket is a gantry-like structure, with both ends of the drive motor bracket fixed above the base plate, the middle portion spanning above the test bench, and the body of the drive motor fixed in the middle of the drive motor bracket.

[0007] As a further improvement of the present invention, the test fixture includes a flexible coupling, a bending torque sensor and a connecting fixture, the upper end of the flexible coupling is coaxially fixed on the rotating shaft of the drive motor, the connecting fixture is installed on the upper end of the test base, the bending torque sensor is coaxially fixed on the lower end of the flexible coupling, and the test bearing is installed on the lower end of the bending torque sensor.

[0008] As a further improvement of the present invention, the bending torque sensor is also connected to a tooling support plate, and the drive motor bracket is provided with an up and down adjustment device near the drive motor, and the up and down adjustment device is linked with the tooling support plate to drive the tooling support plate to move up and down.

[0009] As a further improvement of the present invention, the upper and lower adjustment device includes an upper base, a lower base, a guide rod and a needle screw. The upper base and the lower base are both fixed on the drive motor bracket and are distributed up and down. The guide rod and the needle screw are fixed between the upper base and the lower base at intervals. The tooling support plate is sleeved on the guide rod and the needle screw, and the tooling support plate is threadedly connected to the needle screw. An adjusting handwheel is rotatably provided on the lower base, and the adjusting handwheel is linked with the needle screw to drive the needle screw to rotate.

[0010] Beneficial effects of the present invention: The wheel hub bearing bending fatigue testing machine of the present invention is aimed at the needs in the background technology, and includes components such as a test base, a drive motor bracket, a drive motor and a test fixture, and can effectively realize the test of the rotation bending fatigue of the wheel hub bearing, filling the gap of the equipment in this aspect of the prior art, and has significant advancement, and can meet the needs of the wheel hub bearing performance test evaluation, improve the safety and stability of the automobile wheel hub bearing, and thus improve the safety performance of the automobile operation BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 It is the overall structure diagram of the wheel hub bearing bending fatigue testing machine of the present invention; Figure 2 for Figure 1 The overall structure diagram of the test tooling; Figure 3 for Figure 2 The overall structural diagram of the middle and upper and lower adjustment devices. DETAILED DESCRIPTION

[0012] The present invention will be further described below in detail with reference to the embodiments shown in the accompanying drawings.

[0013] Reference Figure 1As shown, the wheel hub bearing bending fatigue testing machine of this embodiment includes a test base 1, a drive motor bracket 2, a drive motor 3 and a test fixture 4. The drive motor bracket 2 spans above the test base 1, and the body of the drive motor 3 is fixedly mounted on the drive motor bracket 2 and is above the test base 1. The rotating shaft is set vertically downward, and the test fixture 4 is mounted on the rotating shaft of the drive motor 3. The bearing to be tested is mounted below the test fixture 4 and is clamped between the test fixture 4 and the test base 1. Compared with the background technology, this structure enables the testing machine to perform bending fatigue tests on wheel hub bearings, meet the needs of wheel hub bearing performance testing, and verify whether the rotational bending performance of automobile wheel hub bearings meets the design requirements.

[0014] Further, see Figure 1 As shown, the test base 1 includes a test bench 11, a base plate 12 and a plurality of flexible pads 13, wherein the plurality of flexible pads 13 are fixedly mounted on the base plate 12 and are distributed in a circle, wherein the lower end of the test bench 11 is fixedly mounted on the flexible pads 13, and the upper end serves as a test bench surface and cooperates with the test fixture 4, wherein a spring is installed in the pads 13, and the upper and lower supporting surfaces of the pads 13 are separable blocks, which are connected by a spring, and under the action of an external force, the upper and lower supporting surfaces can move relative to each other, and when installed, the upper surface is in contact with the base ground, and the lower surface is in contact with the base plate 12, and the test bench 11 is composed of a disc table and a cylindrical base, and when the base is swung by an external force, the flexible pads 13 can support the swing of the base in a limited position.

[0015] Further, see Figure 1 As shown, the drive motor bracket 2 is a gantry-like structure, with both ends of the drive motor bracket 2 fixed above the base plate 12, the middle portion spanning above the test bench 11, and the body of the drive motor 3 fixed in the middle of the drive motor bracket 2. The drive motor bracket 2 with the gantry structure provides stable support for the drive motor 3.

[0016] Further, see Figure 1 , Figure 2 As shown, the test fixture 4 includes a flexible coupling 41, a bending torque sensor 42 and a connecting fixture 43. The upper end of the flexible coupling 41 is coaxially fixed on the rotating shaft of the driving motor 3, and the connecting fixture 43 is installed on the upper end of the test base 1. The bending torque sensor 42 is coaxially fixed to the lower end of the flexible coupling 41, and the test bearing is installed at the lower end of the bending torque sensor 42. The flexible coupling 41 can buffer the impact when the motor rotates. The bending torque sensor 42 can monitor the torque in real time, record the real-time bending torque force during the operation of the test equipment, and feed back to the control system whether the real-time torque force reaches the preset value. The control system adjusts the operating frequency of the motor to ensure that the working torque of the test equipment meets the test requirements.

[0017] Further, see Figure 2 As shown, the bending torque sensor 42 is also connected to a tooling support plate 44. The drive motor bracket 2 is provided with an up and down adjustment device 45 near the drive motor 3. The up and down adjustment device 45 is linked with the tooling support plate 44 to drive the tooling support plate 44 to move up and down. During the test installation and adjustment of the tooling, the height position of the tooling can be adjusted, and the unconnected test tooling 4 can be supported. When the test machine is working normally, the device is separated from the rotating test bearing part and does not interfere with the bearing work of the rotating part. The device is connected to the drive motor bracket 2.

[0018] Further, see Figure 3 As shown, the upper and lower adjustment device 45 includes an upper base 451, a lower base 452, a guide rod 453 and a needle screw 454. The upper base 451 and the lower base 452 are both fixed on the driving motor bracket 2 and are distributed up and down. The guide rod 453 and the needle screw 454 are fixed between the upper base 451 and the lower base 452 at intervals. The tooling support plate 44 is sleeved on the guide rod 453 and the needle screw 454, and the tooling support plate 44 is threadedly connected with the needle screw 454. An adjusting hand wheel 455 is rotatably provided on the lower base 452. The adjusting hand wheel 455 is linked with the needle screw 454 to drive the needle screw 454 to rotate. This structure makes the upper and lower adjustment device 45 easy to operate and accurate to adjust. By rotating the adjusting hand wheel 455 to drive the needle screw 454 to rotate, the screw thread cooperation between the needle screw 454 and the tooling support plate 44 can be used to achieve fine adjustment of the height of the tooling support plate 44.

[0019] In summary, the wheel hub bearing bending fatigue testing machine can effectively reduce test vibration, provide stable support, accurately detect bearing performance, flexibly adapt to different specifications of bearing tests, and is easy and accurate to operate through unique structural design, such as the test base 1, the drive motor bracket 2, the test fixture 4 and the reasonable arrangement of its various components. Compared with the background technology, it has significant advantages in test stability, accuracy, applicability and ease of operation. The above is only a preferred embodiment of the present invention, and the protection scope of the present invention is not limited to the above embodiments. All technical solutions under the concept of the present invention belong to the protection scope of the present invention. It should be pointed out that for ordinary technicians in this technical field, some improvements and modifications without departing from the principle of the present invention should also be regarded as the protection scope of the present invention.

Claims

1. A wheel hub bearing bending fatigue testing machine, characterized in that: The test fixture (4) comprises a test base (1), a drive motor bracket (2), a drive motor (3) and a test fixture (4), wherein the drive motor bracket (2) is arranged horizontally above the test base (1), the body of the drive motor (3) is fixedly mounted on the drive motor bracket (2) and is located above the test base (1), and the rotating shaft is arranged vertically downward, the test fixture (4) is mounted on the rotating shaft of the drive motor (3), and the bearing to be tested is mounted below the test fixture (4) and is clamped between the test fixture (4) and the test base (1).

2. The wheel hub bearing bending fatigue testing machine according to claim 1, characterized in that: The test base (1) comprises a test bench (11), a base plate (12) and a plurality of flexible pads (13); the plurality of flexible pads (13) are fixedly mounted on the base plate (12) and distributed in a circular pattern; the lower end of the test bench (11) is fixedly mounted on the flexible pads (13), and the upper end serves as a test bench surface to cooperate with the test fixture (4).

3. The wheel hub bearing bending fatigue testing machine according to claim 2, characterized in that: The drive motor bracket (2) is a gantry-like structure, with both ends of the drive motor bracket (2) fixed above the bottom plate (12), and the middle portion spanning above the test bench (11), and the body of the drive motor (3) fixed to the middle portion of the drive motor bracket (2).

4. The wheel hub bearing bending fatigue testing machine according to claim 1, 2 or 3, characterized in that: The test fixture (4) comprises a flexible coupling (41), a bending torque sensor (42) and a connecting fixture (43); the upper end of the flexible coupling (41) is coaxially fixed to the rotating shaft of the drive motor (3); the connecting fixture (43) is mounted on the upper end of the test base (1); the bending torque sensor (42) is coaxially fixed to the lower end of the flexible coupling (41); and the test bearing is mounted on the lower end of the bending torque sensor (42).

5. The wheel hub bearing bending fatigue testing machine according to claim 4, characterized in that: The bending torque sensor (42) is also connected to a tool support plate (44); a vertical adjustment device (45) is provided at a position of the drive motor bracket (2) close to the drive motor (3); the vertical adjustment device (45) is linked to the tool support plate (44) to drive the tool support plate (44) to move up and down.

6. The wheel hub bearing bending fatigue testing machine according to claim 5, characterized in that: The upper and lower adjustment device (45) comprises an upper base (451), a lower base (452), a guide rod (453) and a needle screw (454); the upper base (451) and the lower base (452) are both fixed on the drive motor bracket (2) and are arranged in an upper and lower arrangement; the guide rod (453) and the needle screw (454) are fixed between the upper base (451) and the lower base (452) at intervals; the tooling support plate (44) is sleeved on the guide rod (453) and the needle screw (454), and the tooling support plate (44) is threadedly connected to the needle screw (454); an adjusting hand wheel (455) is rotatably provided on the lower base (452); the adjusting hand wheel (455) is linked to the needle screw (454) to drive the needle screw (454) to rotate.

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