A low-temperature torque measuring device and method for a vibration-reducing bearing

Abstract

The present application relates to the field of bearing test, especially to a low-temperature torque measuring device for damping bearing, comprising a high-low temperature box and a measuring assembly, the measuring assembly is detachably connected in the high-low temperature box, a heat preservation cover is arranged on the high-low temperature box, and the heat preservation cover is used for the detection wrench to extend into the detection; the measuring assembly comprises a loading force frame, two ends of the loading force frame in the vertical direction are provided with matching tools, a pressure sensor is fixedly arranged between one of the matching tools and the loading force frame and the rotation of the pressure sensor is limited, a test tool is arranged between the matching tools, one end of the test tool is used for mounting a test bearing, and the other end of the test tool is used for mounting a test bearing, and the matching tools, the test tool and the pressure sensor are concentrically arranged; the test tool can drive the rotation of the inner ring of the bearing, and the outer ring of the bearing is abutted against the matching tool, and the pressure sensor can detect the friction torque of the outer ring of the bearing and the matching tool when the inner ring of the bearing rotates. Low-temperature torque can be measured at low cost.

Description

Technical Field

[0001] This invention relates to the field of bearing testing, and in particular to a low-temperature torque measuring device and testing method for vibration-damping bearings. Background Technology

[0002] like Figure 1 The image shows a pair of shock absorber bearings, a crucial component of the shock absorber, typically comprising an upper cover, a lower cover, and a thrust ball. To achieve lightweight design and better suitability for suspension conditions, most shock absorber bearings employ a composite structure. The upper and lower covers are made of resilient plastic for cushioning, while the raceway rings are made of metal for load-bearing and rotational components. Automotive environments require operating temperatures from -40 to 85 degrees Celsius. Since automotive shock absorbers are exposed to the outside of the vehicle, their operating temperature is equivalent to ambient temperature.

[0003] The bearing in a shock absorber is a key rotating component. Excessive torque in this component can negatively impact steering comfort and cause abnormal noises. Therefore, evaluating the bearing's torque performance at different temperatures is crucial. Especially in low-temperature environments, the viscosity of bearing grease increases, leading to a greater frictional torque in the bearing. Therefore, accurately measuring the bearing torque at low temperatures is a crucial indicator in vibration damper bearing performance testing. Summary of the Invention

[0004] To address the problem of measuring the torque of vibration-damping bearings in low-temperature environments under existing technologies, this application provides a low-temperature torque measuring device for vibration-damping bearings, the specific solution of which is as follows.

[0005] A vibration damping bearing low-temperature torque measuring device includes a high and low temperature chamber and a measuring component. The measuring component is detachably connected to the high and low temperature chamber. The high and low temperature chamber is provided with a heat insulation cover, which allows a testing wrench to be inserted for testing. The measuring component includes a force-loading frame, with mating fixtures at both ends of the force-loading frame in the vertical direction. A pressure sensor is fixedly installed between one of the mating fixtures and the force-loading frame, and the rotation of the pressure sensor is restricted. A test fixture is installed between the mating fixtures. One end of the test fixture is used to install a test bearing, and the other end of the test fixture is used to install a test bearing. The mating fixture, the test fixture, and the pressure sensor are all concentrically arranged. The test fixture can drive the inner ring of the bearing to rotate and the outer ring of the bearing to abut against the mating fixture. The pressure sensor can detect the frictional torque between the outer ring and the mating fixture when the inner ring of the bearing rotates.

[0006] By adopting the above technical solution, the low-temperature torque of the shock-absorbing bearing can be accurately measured using a conventional high and low temperature chamber. The test bearing is also a companion bearing, which can eliminate the torque interference of the auxiliary bearing and obtain the low-temperature torque of the product more accurately.

[0007] Optionally, the loading force frame is provided with a corresponding loading force bolt for the tooling. The loading force bolt can move in the vertical direction. The loading force bolt abuts against the pressure sensor. The loading force bolt is concentrically arranged with the test tooling and can push the pressure sensor and the test tooling to apply a loading force.

[0008] By adopting the above technical solutions, the load-bearing bolt can effectively apply load force to the measuring component, thereby meeting the testing requirements and enabling more accurate torque testing.

[0009] Optionally, the loading force bolt is provided with an anti-loosening nut, which is threadedly connected to the loading force bolt and can abut against the loading force frame.

[0010] By adopting the above technical solution, the anti-loosening nut can fix the load-bearing bolt, thereby ensuring that the load applied by the load-bearing bolt to the measuring component remains stable.

[0011] Optionally, the loading force frame is provided with anti-rotation bolts corresponding to the pressure sensor. The anti-rotation bolts are threadedly connected to the loading force frame and abut against the pressure sensor on both sides.

[0012] By adopting the above technical solution, when the bearing is tested, the pressure sensor will also be subjected to rotational force. Therefore, setting an anti-rotation nut can effectively reduce the impact of rotation on the measurement accuracy of the pressure sensor, and further improve the measurement accuracy.

[0013] Optionally, the loading force frame is provided with a mounting plate corresponding to the anti-rotation bolt, the mounting plate is fixedly connected to the loading force frame, and the anti-rotation bolt is threadedly connected to the mounting plate.

[0014] By adopting the above technical solutions, the installation plate can effectively provide an installation position for the anti-rotation bolts, making installation more convenient.

[0015] Optionally, the mating fixture is inclined, and the mating fixture is configured to correspond with the testing fixture.

[0016] By adopting the above technical solutions, the inclined fitting fixture can apply axial and radial loads to the bearing in a low-temperature environment, further improving the accuracy of the test.

[0017] Optionally, the test fixture includes a test frame and a test support column. The test support column is fixedly installed between two test frames. The test frames are set to match the shape and angle of the test fixture. The test bearing and the auxiliary test bearing are installed on the test frame.

[0018] By adopting the above technical solutions, the test frame and test support work together, making it easier for the testing wrench to control the entire test frame, thereby improving the convenience of testing.

[0019] Optionally, the test fixture is provided with a wrench interface for connecting a test wrench.

[0020] By adopting the above technical solution, opening a wrench interface on the test fixture makes it easier to connect the test wrench, thereby completing the connection and further improving the convenience of testing.

[0021] This application also provides a method for measuring the low-temperature torque of a vibration-damping bearing, including the low-temperature torque measuring device for vibration-damping bearings as described in any one of claims 1-8, employing the following method: A. Design the tilt angle of the mating tooling according to the required axial and radial loads, and then assemble the tilting tooling, test tooling and auxiliary test tooling according to the mating tooling. B. Place the entire measurement assembly into the high and low temperature chamber; C. Secure the anti-loosening bolts on both sides of the pressure sensor; D. Rotate the force-applying bolt to apply force to 80% of the required load, and then secure it with the anti-loosening bolt; E. Adjust the high and low temperature chamber to the required temperature and set the freezing time; F. When the freezing time is halfway through, readjust the loading force bolts to apply the force to 100% of the required load, and then secure it with the anti-loosening bolts. G. When the freezing time reaches the required level, manually test the low-temperature torque through the insulation cover; H. After calculating the low-temperature torque, test and adjust the temperature to measure the high-temperature torque.

[0022] In summary, this application has at least the following beneficial effects: By adopting the above technical solution, the problem of measuring the torque of vibration-damping bearings under low-temperature conditions under existing technology has been solved. It is possible to use a high-low temperature chamber to lower the temperature and apply axial and radial forces to the bearing to complete the low-temperature torque test. Moreover, the test bearing is accompanied by a bearing, which can measure the torque of a pair of identical bearings at the same time, thereby improving the accuracy and convenience of the test. Attached Figure Description

[0023] Figure 1 It is a 3D diagram of a bearing.

[0024] Figure 2This is a perspective view of the high and low temperature chamber in this embodiment.

[0025] Figure 3 This is a three-dimensional view of the detection component in this embodiment.

[0026] Figure 4 This is a three-dimensional view of the detection component in this embodiment.

[0027] Figure 5 This is a three-dimensional view of the detection component in this embodiment.

[0028] Figure 6 This is a three-dimensional view of the detection component in this embodiment.

[0029] Explanation of reference numerals in the attached figures: 1. High and low temperature chamber; 11. Insulation cover; 2. Loading force frame; 21. Fitting tooling; 22. Pressure sensor; 23. Test tooling; 231. Test frame; 232. Test support; 233. Wrench interface; 24. Loading force bolt; 241. Locking nut; 25. Anti-rotation bolt; 251. Mounting plate; 3. Bearings. Detailed Implementation

[0030] The present application will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0031] A low-temperature torque measuring device for vibration-damping bearings, such as Figure 2 and Figure 3 As shown, the system includes a high-low temperature chamber 1 and a measuring component. The measuring component is detachably connected inside the high-low temperature chamber 1. The high-low temperature chamber 1 is equipped with a thermal insulation cover 11, which allows a testing wrench to be inserted for torque testing. In specific implementations, the basic working principle of the high-low temperature chamber 1 is the same as that of conventional high-low temperature chambers on the market. The measuring component is installed using conventional bolts. The thermal insulation cover 11 is fixedly installed at the bottom of the observation window. The thermal insulation cover 11 is made of heat-insulating material and has a normally closed zipper made of heat-insulating material. It needs to be kept closed when not testing, and opened when testing. When the test temperature is low, personnel need to take protective measures, such as wearing protective clothing, goggles, and gloves, to insert the testing wrench for torque testing to avoid frostbite or burns. In other embodiments, an automatic testing scheme capable of mechanically driving the testing wrench can be installed inside the high-low temperature chamber 1, which can appropriately increase costs and further improve the convenience of testing.

[0032] like Figure 3 and Figure 4As shown, the measuring assembly includes a force-loading frame 2. At both ends of the force-loading frame 2 in the vertical direction, there are mating fixtures 21. A pressure sensor 22 is fixedly mounted between one of the mating fixtures 21 and the force-loading frame 2, and the rotation of the pressure sensor 22 is restricted. A test fixture 23 is positioned between the mating fixtures 21. One end of the test fixture 23 is used to install a test bearing, and the other end is used to install a test bearing. The mating fixtures 21, test fixture 23, and pressure sensor 22 are all concentrically arranged. In specific implementation, the rotation direction of the test bearing and the test bearing should be kept consistent, and an identical set of bearings should be used. The bearings are installed with the test fixture 23 using bolt connections, etc. Simply rotating the test fixture 23 will cause the inner rings of the bearings on both sides to rotate, and the outer rings of the bearings will abut against the mating fixture 21. The pressure sensor 22 can detect the frictional torque between the outer ring and the mating fixture 21 when the inner ring of the bearing rotates.

[0033] like Figure 2 and Figure 3 As shown, a loading bolt 24 is provided on the loading frame 2 corresponding to the fitting fixture 21. The loading bolt 24 can move in the vertical direction and abuts against the pressure sensor 22. The loading bolt 24 is concentrically arranged with the testing fixture 23 and can push the pressure sensor 22 and the testing fixture 23 to apply a loading force. In specific implementation, the loading bolt 24 can apply a load to the clamped bearing to facilitate testing. The loading bolt 24 needs to use a large pitch thread to avoid loosening when the bearing rotates during testing.

[0034] like Figure 2 and Figure 3 As shown, a locking nut 241 is provided on the loading bolt 24. The locking nut 241 is threadedly connected to the loading bolt 24 and can abut against the loading frame 2. In specific implementation, the rotation of the locking bolt is restricted by the locking nut 241, thus further reducing the possibility of loosening.

[0035] like Figure 2 and Figure 4 As shown, anti-rotation bolts 25 are provided on the force loading frame 2 corresponding to the pressure sensor 22. The anti-rotation bolts 25 are threadedly connected to the force loading frame 2, and abut against the pressure sensor 22 on both sides. A mounting plate 251 is provided on the force loading frame 2 corresponding to the anti-rotation bolts 25. The mounting plate 251 is fixedly connected to the force loading frame 2, and the anti-rotation bolts 25 are threadedly connected to the mounting plate 251. In practical implementation, the anti-rotation bolts 25 can press against the pressure sensor 22 from both sides, reducing the possibility of the pressure sensor 22 rotating with the bearing, and further improving the accuracy of detection.

[0036] like Figure 2 and Figure 6 As shown, the mating fixture 21 is inclined, and it corresponds to the test fixture 23. The test fixture 23 includes a test frame 231 and a test support 232. The test support 232 is fixedly installed between two test frames 231. The test frame 231 is set in a shape and angle corresponding to the mating fixture 21. The test bearing and the auxiliary bearing are mounted on the test frame 231. A wrench interface 233 is provided on the test frame 231 for connecting a testing wrench. In practice, the test bearing and the auxiliary bearing can be simultaneously subjected to axial and longitudinal loads at the inclined angle, further improving the accuracy of the test. In practice, the auxiliary bearing needs to be the same model as the test bearing to avoid the auxiliary bearing causing errors to the test bearing.

[0037] A method for measuring the low-temperature torque of a vibration-damping bearing, comprising the aforementioned low-temperature torque measuring device for vibration-damping bearings, employing the following method: A. Design the tilt angle of the mating fixture 21 according to the required axial and radial loads, and then assemble the tilting fixture, test fixture 23 and auxiliary test fixture according to the mating fixture 21. B. Place the entire measurement assembly into the high and low temperature chamber 1; C. Secure the anti-loosening bolts on both sides of the pressure sensor 22; D. Rotate the force-applying bolt 24 to apply force to 80% of the required load, and then secure it with the anti-loosening bolt; E. Adjust the high and low temperature chamber 1 to the required temperature and set the freezing time; F. When the freezing time is halfway through, adjust the loading force bolt 24 again to apply the force to 100% of the required load, and fix it with the anti-loosening bolt; G. When the freezing time reaches the required level, manually test the low-temperature torque through the insulation cover 11; H. After calculating the low-temperature torque, test and adjust the temperature to measure the high-temperature torque; then calculate the bearing torque. There are two calculation methods: 1. Divide the measured torque by 2 to obtain the torque of a single bearing; 2. Take the data of 3 bearings respectively, pair them in pairs by numbering, measure three sets of data, and calculate the low-temperature torque of each bearing by using a quadratic equation with three variables.

[0038] Working principle: A common high and low temperature chamber is used to test a set of bearings, and the influence of auxiliary bearings on the torque data of the tested bearings is avoided, which can effectively improve the convenience and accuracy of bearing testing.

[0039] The above are preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made to the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A low-temperature torque measuring device for vibration-damping bearings, characterized in that: It includes a high and low temperature chamber (1) and a measuring component. The measuring component is detachably connected to the high and low temperature chamber (1). The high and low temperature chamber (1) is provided with a heat insulation cover (11) for a testing wrench to be inserted for testing. The measuring component includes a loading force frame (2), with mating fixtures (21) at both ends of the loading force frame (2) in the vertical direction. A pressure sensor (22) is fixedly installed between one of the mating fixtures (21) and the loading force frame (2), and the rotation of the pressure sensor (22) is restricted. A test fixture (23) is installed between the mating fixtures (21). One end of the test fixture (23) is used to install a test bearing, and the other end of the test fixture (23) is used to install a test bearing. The mating fixture (21), the test fixture (23), and the pressure sensor (22) are all concentrically arranged. The test fixture (23) can drive the inner ring of the bearing to rotate and the outer ring of the bearing to abut against the mating fixture (21). The pressure sensor (22) can detect the frictional torque between the outer ring and the mating fixture (21) when the inner ring of the bearing rotates.

2. The low-temperature torque measuring device for vibration-damping bearings according to claim 1, characterized in that: The loading force frame (2) is provided with a loading force bolt (24) corresponding to the fitting tool (21). The loading force bolt (24) can move in the vertical direction. The loading force bolt (24) abuts against the pressure sensor (22). The loading force bolt (24) is concentrically arranged with the test tool (23) and can push the pressure sensor (22) and the test tool (23) to apply a loading force.

3. The low-temperature torque measuring device for vibration-damping bearings according to claim 2, characterized in that: The loading force bolt (24) is provided with a lock nut (241), which is threadedly connected to the loading force bolt (24) and can abut against the loading force frame (2).

4. The low-temperature torque measuring device for vibration-damping bearings according to claim 3, characterized in that: The loading force frame (2) is provided with anti-rotation bolts (25) corresponding to the pressure sensor (22). The anti-rotation bolts (25) are threadedly connected to the loading force frame (2), and the anti-rotation bolts (25) abut against the pressure sensor (22) on both sides of the pressure sensor (22).

5. The low-temperature torque measuring device for vibration-damping bearings according to claim 4, characterized in that: The loading force frame (2) is provided with a mounting plate (251) corresponding to the anti-rotation bolt (25). The mounting plate (251) is fixedly connected to the loading force frame (2), and the anti-rotation bolt (25) is threaded onto the mounting plate (251).

6. The low-temperature torque measuring device for vibration-damping bearings according to claim 1, characterized in that: The mating fixture (21) is inclined and is correspondingly set with the testing fixture (23).

7. The low-temperature torque measuring device for vibration-damping bearings according to claim 6, characterized in that: The test fixture (23) includes a test frame (231) and a test support (232). The test support (232) is fixedly installed between two test frames (231). The test frame (231) is set to match the shape and angle of the fixture (21). The test bearing and the auxiliary test bearing are installed on the test frame (231).

8. The low-temperature torque measuring device for vibration-damping bearings according to claim 7, characterized in that: The test fixture (231) is provided with a wrench interface (233), which is used to connect a test wrench.

9. A method for measuring the low-temperature torque of a vibration-damping bearing, characterized in that: The vibration damping bearing low-temperature torque measuring device according to any one of claims 1-8 employs the following method: A. Design the tilt angle of the mating fixture (21) for the required axial and radial loads, and then assemble the tilting fixture, test fixture (23) and test fixture according to the mating fixture (21); B. Place the entire measurement assembly into the high and low temperature chamber (1); C. Fix anti-loosening bolts on both sides of the pressure sensor (22); D. Rotate the load-bearing bolt (24) to apply force to 80% of the required load and secure it with the anti-loosening bolt; E. Adjust the high and low temperature chamber (1) to the required temperature and set the freezing time; F. When the freezing time is halfway through, adjust the loading force bolt (24) again to load the force to 100% of the required load, and fix it with the anti-loosening bolt; G. When the freezing time reaches the required level, manually test the low-temperature torque through the insulation cover (11); H. After calculating the low-temperature torque, test and adjust the temperature to measure the high-temperature torque.

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