Vertical friction performance testing device for powder metallurgy bearing of automobile motor

Abstract

The utility model belongs to the technical field of powder metallurgy bearing testing, and particularly relates to an automobile motor powder metallurgy bearing vertical friction performance testing device which comprises a bottom plate. A mounting through hole is formed in the center of the bottom plate, and a servo electric cylinder is arranged on one side of the top surface of the bottom plate; a telescopic shaft of the output end of the servo electric cylinder is connected with a push block. The other end of the push block is connected with a tension seat; a test part is arranged on the tension seat, the center of the tension seat is arranged at the mounting through hole of the bottom plate, a driving part is arranged at the lower part of the tension seat, and the driving part is used for cooperating with the test part to test the performance of the to-be-tested bearing together. According to the utility model, the testing component and the driving component are matched for use, so that different loads can be increased for testing according to testing requirements, the testing repeatability and accuracy are greatly improved, the testing is more time-saving and labor-saving, the time cost is reduced, and the product development efficiency is improved.

Description

Technical Field

[0001] This utility model belongs to the field of powder metallurgy bearing testing technology, specifically relating to a vertical friction performance testing device for automotive motor powder metallurgy bearings. Background Technology

[0002] Powder metallurgy bearings are made by pressing, sintering, shaping, and oil-impregnating metal powders and other anti-friction materials. They possess a porous structure; after being impregnated in hot oil, the pores are filled with lubricating oil. During operation, the suction effect of the rotating journal and frictional heat cause the metal and oil to expand, squeezing the oil out of the pores, thus providing lubrication to the friction surfaces. After the bearing cools, the oil is drawn back into the pores. Currently, powder metallurgy bearings are used in automotive motors, and most testing employs actual assembly testing. To verify the lubrication performance of powder metallurgy bearings in different automotive applications, it is necessary to approximate the bearing's operating environment. However, existing powder metallurgy bearing testing equipment in the industry suffers from the cumbersome actual assembly process and inherent errors during installation, resulting in a large number and frequency of tests, significantly increasing the workload and compromising the consistency and validity of test results. Furthermore, it only yields relatively subjective statistical data and cannot provide quantitative data on the lubrication performance of different lubricating materials, especially the friction performance of representative bearings, lubricating oils, and greases. Utility Model Content

[0003] To address the problems existing in the background technology, this utility model proposes a vertical friction performance testing device for powder metallurgy bearings used in automotive motors. The device integrates precision temperature and distance measurement, closed-loop speed control, directional automatic loading, precision force sensor, data acquisition, and data algorithm. It can realize standardized measurement of the friction performance of powder metallurgy bearings used in automotive motors, thereby solving the problem that traditional methods cannot quantify test data.

[0004] The objective of this utility model can be achieved by the following technical solution: A vertical friction performance testing device for powder metallurgy bearings of automotive motors, comprising a base plate; a mounting through hole is provided at the center of the base plate, and a servo electric cylinder is provided on one side of the top surface of the base plate; a push block is connected to the telescopic shaft at the output end of the servo electric cylinder; a tension seat is connected to the other end of the push block; a testing component is provided on the tension seat, and the center of the tension seat is located at the mounting through hole of the base plate, and a driving component is provided at the lower part of the tension seat, the driving component being used to cooperate with the testing component to perform performance testing on the bearing under test.

[0005] The testing component includes a slide mounted on a tension seat; a reference bearing is located at the center of the top surface of the slide; a laser temperature sensor is located above the reference bearing, and proportional rods are located at both ends of the reference bearing; a micro-force sensor is located on one side of the proportional rod; a displacement sensor is located on one side of the micro-force sensor; a tension / compression sensor is located below the displacement sensor; a spherical dome is located at the front end of the tension / compression sensor, and a thrust rod is located at the rear end of the tension / compression sensor.

[0006] The driving component includes a servo motor disposed at the lower part of the tension seat; the output end of the servo motor is connected to a vertically arranged test shaft; and a motor mount electrically connected to the servo motor is disposed at the upper part of the servo motor.

[0007] The end of the proportional rod is connected to the proportional rod seat; the proportional rod seat is set on the base plate and located on one side of the slide.

[0008] The thrust rod is horizontally positioned within the rear groove of the slide block, and a slide rail is provided at the lower part of the groove; a rigid spring is also fitted around the outer circumference of the thrust rod.

[0009] A cover is provided at the junction of the push rod and the micro-force sensor.

[0010] The outer side of the push block is also provided with two parallel guide rods.

[0011] Compared with existing technologies, the beneficial effects of this utility model are as follows: By using the test component and the drive component in combination, a directional load is used instead of the original physical load type. The load direction is consistent, the load amount is accurate, and different load amounts can be added for testing according to test needs, which greatly improves the repeatability and accuracy of the test. At the same time, the servo motor's built-in encoder is used to achieve stable speed, and a proportional rod and micro-force sensor are used to accurately calibrate and eliminate system errors. It is suitable for standard bench testing, completes data quantification, has a short test cycle, and high result repeatability, making similar tests more time-saving and labor-saving, reducing time costs, and improving product development efficiency. Attached Figure Description

[0012] Figure 1 This is a schematic diagram of the structure of this utility model;

[0013] Figure 2 This is a cross-sectional view of the present invention.

[0014] In the diagram: 1. Base plate, 2. Servo electric cylinder, 3. Push block, 4. Laser temperature sensor, 5. Proportional rod, 6. Micro-force sensor, 7. Tension / compression sensor, 8. Displacement sensor, 9. Double guide rod, 10. Tension seat, 11. Slide, 12. Dome, 13. Cover, 14. Push rod, 15. Slide rail, 16. Hard spring, 17. Proportional rod seat, 18. Reference bearing, 19. Test axis, 20. Servo motor, 21. Motor mount. Detailed Implementation

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

[0016] like Figures 1-2 As shown, a vertical friction performance testing device for powder metallurgy bearings in automotive motors includes a base plate 1. A mounting through hole is provided at the center of the base plate 1, and a servo cylinder 2 is installed on one side of the top surface of the base plate 1. A push block 3 is connected to the telescopic shaft at the output end of the servo cylinder 2. Parallel double guide rods 9 are also provided on the outer surface of the push block 3. Here, the double rods 9 cooperate with the telescopic shaft to extend and retract, providing uniform speed guidance. A tension seat 10 is connected to the other end of the push block 3. A testing component is installed on the tension seat 10, and the center of the tension seat 10 is located at the mounting through hole in the base plate 1. A driving component is provided at the lower part of the tension seat 10, which works in conjunction with the testing component to perform performance testing on the bearing under test. The servo cylinder 2 is used to push and pull the push block 3 to disengage the ball top 12 from the slide 11 to meet debugging requirements.

[0017] The testing component includes a slide 11 mounted on a tension seat 10; a reference bearing 18 is positioned at the center of the top surface of the slide 11; a laser temperature sensor 4 is positioned above the reference bearing 18, and proportional rods 5 are positioned at both ends of the reference bearing 18; a micro-force sensor 6 is positioned on one side of the proportional rod 5; the proportional rod 5 and micro-force sensor 6 are used here, employing a distance sensor (accuracy 0.01mm) to accurately calibrate and eliminate system errors, and to accurately calculate values ​​such as the friction coefficient and wear amount according to the algorithm; a displacement sensor 8 is positioned on one side of the micro-force sensor 6; a tension / compression sensor 7 is positioned below the displacement sensor 8; the end of the proportional rod 5 is connected to a proportional rod seat 17; the proportional rod seat 17 is mounted on the base plate 1 and located on the slide 11. On one side; here, the quasi-bearing 18 is used to install the bearing to be tested into the inner hole of the reference bearing 19. The assembled micro-force sensor 6, displacement sensor 8, and tension / compression sensor 7, etc., are gently installed into their original positions with the test axis as the center for the next test. The tension / compression sensor 7 has a ball top 12 at its front end and a push rod 14 at its rear end. The push rod 14 is horizontally arranged in the rear groove of the slide block 11, and a slide rail 15 is provided at the lower part of the groove. A stiff spring 16 is also sleeved on the outer circumference of the push rod 14. A stop cover 13 is provided at the junction of the push rod 14 and the micro-force sensor 6. Here, the push rod 14 can extend and retract along the slide rail 15 under the compression of the stiff spring 16, thereby pushing the ball top 12 at the end to move to meet the test requirements.

[0018] The driving component includes a servo motor 20 located at the lower part of the tension seat 10; the output end of the servo motor 20 is connected to a vertically arranged test shaft 19; and a motor base 21 electrically connected to the servo motor 20 is also provided on the upper part of the servo motor 20. Here, the rotation of the servo motor 20 drives the test shaft 19 to rotate in a circle, and the built-in encoder of the servo motor 20 can be used to achieve stable speed and rotation time control of the bearing under test.

[0019] In practical use, the laser temperature sensor and displacement sensor are first removed. The servo cylinder is then jogged to disengage the ball joint from the slide block to a distance of approximately 10mm. The slide block, proportional rod seat, reference bearing, and proportional rod assembly are then removed as a whole. Next, the bearing to be tested is installed into the inner hole of the reference bearing. The assembled test components are then gently installed back into their original positions, centered on the test axis, avoiding any impact to the micro-force sensor and tension / compression sensor. The displacement sensor is reset and the distance is calibrated to zero. The laser temperature sensor is reset, and the target point is calibrated to the midpoint of the bearing wall thickness. The servo cylinder is then jogged to bring the ball joint closer to the slide block to a distance of approximately 0.5mm. Parameters such as rotation speed, duration, load value, and steps are set, and the test is started. The test is completed according to the settings, and data such as friction coefficient, wear amount, and temperature change are obtained through the embedded algorithm. This device can be modified with different loads and speeds according to testing requirements, making powder metallurgy bearing testing more accurate and convenient. Combined with a closed-loop control system, specially customized reference bearings, and 0.1% precision tensile and compressive force sensors, it greatly reduces testing errors. The automatic load system can programmatically complete fixed and periodic load settings. This device can also be used for similar data measurement of other types of sliding bearings used in vertical environments, achieving a comprehensive purpose of multiple uses.

[0020] The above are merely preferred embodiments of this utility model, but the scope of protection of this utility model is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in this utility model, based on the technical solution and inventive concept of this utility model, should be included within the scope of protection of this utility model.

Claims

1. A vertical friction performance testing device for powder metallurgy bearings of automotive motors, comprising a base plate (1); characterized in that: A mounting through hole is provided at the center of the base plate (1), and a servo electric cylinder (2) is provided on one side of the top surface of the base plate (1); the telescopic shaft of the output end of the servo electric cylinder (2) is connected to a push block (3); the other end of the push block (3) is connected to a tension seat (10); a test component is provided on the tension seat (10), and the center of the tension seat (10) is located at the mounting through hole of the base plate (1), and a drive component is provided at the lower part of the tension seat (10). The drive component is used to cooperate with the test component to perform performance testing on the bearing under test.

2. The vertical friction performance testing device for automotive motor powder metallurgy bearings according to claim 1, characterized in that: The test component includes a slide (11) mounted on a tension seat (10); a reference bearing (18) is mounted at the center of the top surface of the slide (11); a laser temperature sensor (4) is mounted above the reference bearing (18), and proportional rods (5) are mounted at both ends of the reference bearing (18); a micro-force sensor (6) is mounted on one side of the proportional rod (5); a displacement sensor (8) is mounted on one side of the micro-force sensor (6); a tension / compression sensor (7) is mounted below the displacement sensor (8); a dome (12) is mounted at the front end of the tension / compression sensor (7), and a thrust rod (14) is mounted at the rear end of the tension / compression sensor (7).

3. The vertical friction performance testing device for automotive motor powder metallurgy bearings according to claim 1, characterized in that: The driving component includes a servo motor (20) disposed at the lower part of the tension seat (10); the output end of the servo motor (20) is connected to a vertically arranged test shaft (19); and a motor seat (21) electrically connected to the servo motor (20) is also disposed at the upper part of the servo motor (20).

4. The vertical friction performance testing device for automotive motor powder metallurgy bearings according to claim 2, characterized in that: The end of the proportional rod (5) is connected to the proportional rod seat (17); the proportional rod seat (17) is set on the base plate (1) and located on one side of the slide (11).

5. The vertical friction performance testing device for automotive motor powder metallurgy bearings according to claim 2, characterized in that: The thrust rod (14) is horizontally arranged in the rear groove of the slide (11), and a slide rail (15) is provided at the lower part of the groove; a hard spring (16) is also sleeved on the outer circumference of the thrust rod (14).

6. The vertical friction performance testing device for automotive motor powder metallurgy bearings according to claim 2, characterized in that: A cover (13) is provided at the junction of the push rod (14) and the micro-force sensor (6).

7. The vertical friction performance testing device for automotive motor powder metallurgy bearings according to claim 1, characterized in that: The outer side of the push block (3) is also provided with parallel double guide rods (9).

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