Joint bearing test device and test method

Abstract

A knuckle bearing testing device comprises a bottom plate, a detection platen fixedly installed on the bottom plate, a bearing annular plate installed on the detection platen and connected to an outer ring of a knuckle bearing in a sleeving mode, and a transmission shaft in interference fit with an inner ring of the knuckle bearing and capable of driving the inner ring of the knuckle bearing to rotate. A through detection channel is formed in the detection table plate, an inner spherical surface is arranged on the inner wall of the detection channel, an outer spherical surface matched with the inner spherical surface is arranged on the outer side of the bearing ring plate, an elastic return piece abutting against the rear end of the bearing ring plate is installed on the bottom plate, and a pushing test piece capable of pushing the bearing ring plate to slide from multiple positions is installed on the transmission shaft. According to the invention, the use condition of the knuckle bearing in reality can be simulated as much as possible, so that the accuracy of the test data of the knuckle bearing is improved, the tested data of the knuckle bearing is closer to the data in actual use, the reject ratio of products can be reduced, and the durability of the products is improved.

Description

Technical Field

[0001] The invention relates to the technical field of spherical bearing manufacturing, and in particular to a spherical bearing testing device and a testing method. Background Art

[0002] At present, the spherical plain bearing has an inner spherical surface and an outer spherical surface in sliding contact. It can rotate and swing at any angle during movement. The spherical plain bearing has the characteristics of large load capacity, impact resistance, corrosion resistance, wear resistance, self-alignment, good lubrication, etc. The main functions of the spherical plain bearing include: 1. Absorbing and transmitting loads: The spherical plain bearing can bear the load from the bearing connection part and transmit it to the adjacent parts, thereby ensuring the stability and operation safety of the system; 2. Reducing friction: By adopting appropriate lubricants and designs, the spherical plain bearing can reduce the friction loss in mechanical movement, improve energy efficiency and extend service life; 3. Providing angle adjustment: The spherical plain bearing allows the shaft to be adjusted and rotated at a limited angle in multiple directions, thereby meeting the requirements for flexibility and precision in different applications.

[0003] After the spherical bearing is manufactured, it is necessary to perform rotation test and swing test on the joint axle under load to simulate the actual use of the spherical bearing, so as to detect whether the stability and life of the spherical bearing meet the requirements. However, the problem now is that when the existing testing equipment tests the spherical bearing, most of the test items are carried out separately without coordination with each other. For example, one device performs a rotation test on the spherical bearing, and another device performs a swing test on the spherical bearing. In addition, in these existing test processes, the pressure applied to the spherical bearing, the amplitude and direction of the swing are relatively constant. Such tests do not conform to the actual use of the spherical bearing. Therefore, the test data is always quite different from the data in the actual use process.

[0004] For example, the utility model patent with application number CN202121381638.6 records that the utility model provides a joint bearing test device, including a test bench, a linkage mechanism, a swing mechanism, a load mechanism and a joint bearing. The linkage mechanism is arranged on the test bench, including a linkage assembly and a drive assembly. The drive assembly is connected to the linkage assembly, and drives the linkage assembly to reciprocate along the first horizontal direction. The swing mechanism is arranged on the test bench, connected to the linkage assembly, and the linkage assembly drives the swing mechanism to swing in the first horizontal direction. The load mechanism is arranged on the test bench, and is spaced apart from the swing assembly in the first horizontal direction. The joint bearing is connected between the swing mechanism and the load mechanism along the first horizontal direction, and the inner ball of the joint bearing is sleeved on the swing mechanism. The load mechanism provides a load for the joint bearing, and drives the swing mechanism to swing through the reciprocating motion of the linkage assembly, so that the inner ball of the joint bearing swings in the first horizontal direction. In this comparative document, the joint bearing performs regular reciprocating motion in the horizontal direction driven by the linkage assembly, and cannot simulate the actual use of the joint bearing. Summary of the invention

[0005] The present invention aims to solve the problems existing in the above-mentioned prior art and provides a spherical bearing testing device, which drives the inner ring of the spherical bearing to rotate through a transmission shaft. While rotating, it pushes the outer ring of the spherical bearing to swing and vibrate from multiple directions, and can also apply dynamically changing pressure to the inner ring of the spherical bearing through the transmission shaft.

[0006] The present invention solves its technical problems by adopting a technical solution: the joint bearing testing device comprises a base plate, a detection table fixedly mounted on the base plate, a bearing ring plate mounted on the detection table and sleeved on the outer ring of the joint bearing, and a transmission shaft which has an interference fit with the inner ring of the joint bearing and can drive the inner ring of the joint bearing to rotate; a through detection channel is provided on the detection table, an inner spherical surface is provided on the inner wall of the detection channel, an outer spherical surface matching the inner spherical surface is provided on the outer side of the bearing ring plate, an elastic return piece which presses on the rear end of the bearing ring plate is installed on the base plate, and a push test piece which can push the bearing ring plate to slide from multiple positions is installed on the transmission shaft.

[0007] For further improvement, the elastic return part includes a support plate fixed on the base plate, several sleeves fixed on the support plate, a return push rod slidably connected in the sleeve and pressed against the rear end of the bearing ring plate, and a return spring installed in the sleeve and capable of applying pressure to the return push rod.

[0008] For further improvement, the push test piece includes a rotating plate fixed on the outside of the transmission shaft and rotating with the transmission shaft, a sliding push rod fixed on the rotating plate and driven by the rotating plate to revolve around the transmission shaft, and a boss arranged at the front end of the bearing ring plate and corresponding to the sliding push rod. The end of the sliding push rod away from the rotating plate abuts against the front end of the bearing ring plate, and the sliding push rod drives the bearing ring plate to slide by pushing the boss when it revolves.

[0009] For further improvement, the bosses are arranged in multiples and evenly distributed in an array at the front end of the bearing ring plate. The bosses are hemispherical, and the end of the sliding push rod away from the rotating plate is arranged in an arc shape that matches the hemispherical shape of the boss to reduce the resistance of the sliding push rod to push the boss.

[0010] For further improvement, the plurality of bosses are arranged as hemispherical shapes of different sizes, and the sliding push rod drives the bearing ring plate to slide with different amplitudes when pushing bosses of different sizes in turn.

[0011] For further improvement, an arc-shaped groove located between the bosses and corresponding to the sliding push rod is provided at the front end of the bearing ring plate, and the width of the arc-shaped groove is greater than the diameter of the sliding push rod.

[0012] For further improvement, a number of retaining members are provided at both ends of the load-bearing ring plate to prevent the outer ring of the joint bearing from falling off the load-bearing ring plate. The retaining members include a pair of positioning blocks arranged on both sides of the load-bearing ring plate, and the positioning blocks are removably fixed to the positioning screws on the load-bearing ring plate. The positioning blocks limit the outer ring of the joint bearing by pressing against both sides of the outer ring of the joint bearing.

[0013] For further improvement, a dynamic pressure device for applying different pressures to the transmission shaft is fixedly installed on the base plate. The dynamic pressure device includes a pair of vertical rods fixed on the top of the base plate, a pressure plate slidably connected to the pair of vertical rods, a pressure-adjusting spring located between the pressure plate and the base plate and surrounding the vertical rods, and a hook-shaped rotating block fixed on the outside of the transmission shaft and against the top of the pressure plate. The hook-shaped rotating block rotates with the transmission shaft to push the pressure plate up and down.

[0014] For further improvement, a stabilizing plate located in front of the detection table and supporting the transmission shaft is fixedly installed on the bottom plate, and a driven gear for cooperating with the motor to drive the transmission shaft to rotate is fixedly installed on the outside of the transmission shaft.

[0015] A method for testing spherical bearings:

[0016] 1. Rotation test: First, install the motor on the bottom plate, install the driving gear that matches the driven gear on the motor output shaft, start the motor to drive the output shaft to rotate, and the rotation of the output shaft drives the inner ring of the spherical bearing that has an interference fit with it to rotate;

[0017] 2. Sliding test: The rotation of the transmission shaft drives the rotating plate to rotate, and the rotation of the rotating plate drives the sliding push rod to revolve around the transmission shaft. The boss array is distributed on the revolution path of the sliding push rod. The sliding push rod pushes the boss to move when it revolves, and the boss moves to push the load-bearing ring plate to slide. After the load-bearing ring plate slides, it pushes the return push rod into the sleeve, and the return spring accumulates force. When the sliding push rod revolves and leaves the boss, the return spring releases the elastic force, and the return push rod pushes the load-bearing ring plate to return to the center, and makes the load-bearing ring plate hit on the sliding push rod to generate high-frequency and short-time vibration. The sliding push rod pushes multiple bosses in turn through the revolution, which can realize pushing the load-bearing ring plate to slide from multiple different angles, and the sliding amplitude of the load-bearing ring plate can also be changed by setting bosses of different sizes;

[0018] 3. Advanced test: The arc groove is set on the revolution path of the sliding push rod. When the sliding push rod revolves away from the boss, the sliding push rod revolves to correspond to the arc groove, and the return spring releases its elastic force to push the load ring plate back to the center. The load ring plate does not contact the sliding push rod during the return process, thereby generating low-frequency and long-term vibration;

[0019] 4. Pressure test: The output shaft rotates to drive the hook-shaped rotating block to rotate. The hook-shaped rotating block pushes the pressure plate to move up and down reciprocatingly. The pressure plate descends and compresses the pressure-adjusting spring. The pressure-adjusting spring gradually increases the pressure on the hook-shaped rotating block. The pressure plate rises and releases the pressure-adjusting spring. The pressure-adjusting spring gradually reduces the pressure on the hook-shaped rotating block. The hook-shaped rotating block transfers the pressure it receives to the output shaft, and the output shaft applies pressure to the inner ring of the spherical bearing.

[0020] The beneficial effect of the present invention is that the present invention can simulate the actual usage of the joint bearing as much as possible, thereby improving the accuracy of the joint bearing test data, making the joint bearing test data closer to the data during actual use, and can also reduce the product failure rate and improve the product durability. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a positive three-dimensional axonometric drawing of the present invention;

[0022] Figure 2 Based Figure 1 A vertical isometric section view in ;

[0023] Figure 3 for Figure 2 A partial enlarged view in FIG.

[0024] Figure 4 Based Figure 1 Horizontal axonometric section view in;

[0025] Figure 5 for Figure 4 A partial enlarged view of B;

[0026] Figure 6 It is a schematic structural diagram of the elastic return member in the present invention.

[0027] Explanation of the accompanying drawings: base plate 1, table plate 2, bearing ring plate 3, transmission shaft 4, detection channel 5, inner spherical surface 5a, outer spherical surface 3a, elastic return member 6, support plate 6-1, sleeve 6-2, return push rod 6-3, return spring 6-4, push test piece 7, rotating plate 7-1, sliding push rod 7-2, boss 7-3, arc-shaped groove 7-4, retaining member 8, positioning block 8-1, positioning screw 8-2, dynamic pressure device 9, vertical rod 9-1, pressure plate 9-2, pressure regulating spring 9-3, hook-shaped rotating block 9-4, stabilizing plate 10, driven gear 11. DETAILED DESCRIPTION

[0028] The following provides a preferred specific implementation of the present invention in conjunction with the accompanying drawings. What is disclosed is only a preferred specific implementation of the present invention, and it is certainly not intended to limit the scope of rights of the new use model. Therefore, equivalent changes made according to the claims of the present invention are still within the scope covered by the present invention.

[0029] Refer to the attached Figures 1 to 6 : The spherical bearing testing device in this embodiment includes a base plate 1, a detection table 2 fixedly mounted on the base plate 1, a load-bearing ring plate 3 mounted on the detection table 2 and sleeved on the outer ring of the spherical bearing, the load-bearing ring plate 3 is annular, and the inner wall of the load-bearing ring plate 3 is interference-fitted with the outer ring of the spherical bearing, so that the load-bearing ring plate 3 can drive the outer ring of the spherical bearing to slide, a transmission shaft 4 which is interference-fitted with the inner ring of the spherical bearing and can drive the inner ring of the spherical bearing to rotate, and the transmission shaft 4 passes through the inner ring of the spherical bearing. A stabilizing plate 10 located in front of the detection table 2 and supporting the transmission shaft 4 is fixedly mounted on the base plate 1, a driven gear 11 for cooperating with the motor to drive the transmission shaft 4 to rotate is fixedly mounted on the outer side of the transmission shaft 4, a driving gear meshing with the driven gear 11 is installed on the output shaft of the motor, and the motor starts to drive the transmission The moving shaft 4 rotates, and a through detection channel 5 is opened on the detection table 2. The detection channel 5 is arranged at the center position of the detection table 2. The inner wall of the detection channel 5 is provided with an inner spherical surface 5a. The outer side of the load-bearing ring plate 3 is provided with an outer spherical surface 3a that cooperates with the inner spherical surface 5a. The inner spherical surface 5a and the outer spherical surface 3a are fitted together, and the outer spherical surface 3a can swing and slide along the inner spherical surface 5a. An elastic return member 6 that presses on the rear end of the load-bearing ring plate 3 is installed on the bottom plate 1. A push test member 7 that can push the load-bearing ring plate 3 to slide from multiple positions is installed on the transmission shaft 4. The push test member 7 is driven by the transmission shaft 4. The transmission shaft 4 drives the push test member 7 to push the load-bearing ring plate 3 to slide and swing in multiple directions on the circumference. The position of the load-bearing ring plate 3 changes after swinging and sliding, and is returned by the elastic return member 6.

[0030] Refer to the attached Figures 1 to 6The elastic return member 6 includes a support plate 6-1 fixed on the base plate 1, a plurality of sleeves 6-2 fixed on the support plate 6-1, the sleeves 6-2 are arranged in a circular array with the center of the circle of the bearing ring plate 3 as the center and are evenly distributed, and the number can be set to 3 to 8, depending on the required elastic force, a return push rod 6-3 slidably connected in the sleeve 6-2, one end of the return push rod 6-3 is located inside the sleeve 6-2, and the other end of the return push rod 6-3 is located at the top pressure on the rear end of the bearing ring plate 3, the other end of the return push rod 6-3 is arc-shaped, the return push rod 6-3 can extend or retract the sleeve 6-2, a return spring 6-4 installed in the sleeve 6-2 and capable of applying pressure to the return push rod 6-3, one end of the return spring 6-4 is fixed to the blind end of the sleeve 6-2, and the other end of the return spring 6-4 is fixedly connected to the end of the return push rod 6-3 located in the sleeve 6-2.

[0031] Refer to the attached Figures 1 to 6 The push test piece 7 includes a rotating plate 7-1 fixed to the outside of the transmission shaft 4 and rotating with the transmission shaft 4, a sliding push rod 7-2 fixed on the rotating plate 7-1 and driven by the rotating plate 7-1 to revolve around the transmission shaft 4, one end of the sliding push rod 7-2 is fixed on the rotating plate 7-1, and the other end of the sliding push rod 7-2 is against the front end of the bearing ring plate 3, and the other end of the sliding push rod 7-2 is an end away from the rotating plate 7-1. A plurality of bosses 7-3 are arranged at the front end of the bearing ring plate 3 and corresponding to the sliding push rod 7-2. The plurality of bosses 7-3 are evenly distributed in an array with the center of the bearing ring plate 3 as the center. When the sliding push rod 7-2 revolves, it can contact and push the bosses 7-3 in turn. After being pushed, the bosses 7-3 drive the bearing ring plate 3 to deviate as a whole, so that the bearing ring plate 3 slides and swings. The purpose of setting a plurality of bosses 7-3 is to enable the sliding push rod 7-2 to push the bearing ring plate 3 to slide and swing from multiple directions on the circumference. The bearing ring plate 3 is moved, and the bearing ring plate 3 pushes the return push rod 6-3 into the sleeve 6-2 after the deviation occurs, and the return spring 6-4 accumulates force. When the sliding push rod 7-2 rotates past the boss 7-3, the return spring 6-4 accumulates force and releases the force, so that the return push rod 6-3 extends out of the sleeve 6-2 to push the bearing ring plate 3 to be pushed and reset, and the bearing ring plate 3 is again supported by the sliding push rod 7-2. In the process of the return push rod 6-3 extending out of the sleeve 6-2 to push the bearing ring plate 3 to be reset, the return push rod 6-3, under the action of the return spring 6-4, will push the bearing ring plate 3 to hit the end of the sliding push rod 7-2 away from the rotating plate 7-1, and the bearing ring plate 3 itself will generate high-frequency and short-term vibrations, which will be transmitted to the joint bearing to simulate a series of impacts such as bumps and collisions generated by the joint bearing in the actual daily use process. For example, when the joint bearing is installed on a car, it will be very easy to encounter these impacts due to road conditions and other reasons.

[0032] Refer to the attached Figures 1 to 6: The boss 7-3 is hemispherical, and the end of the sliding push rod 7-2 away from the rotating plate 7-1 is set to an arc shape that matches the hemispherical shape of the boss 7-3 to reduce the resistance of the sliding push rod 7-2 pushing the boss 7-3.

[0033] Refer to the attached Figures 1 to 6 : Multiple bosses 7-3 are set to hemispherical shapes of different sizes. For example, four bosses are set at the front end of the load-bearing ring plate 3. Except for the first boss, the radius of the other three bosses is 1.1 times that of the former. In this way, when the sliding push rod 7-2 revolves, the bosses 7-3 of different sizes can push the load-bearing ring plate 3 to produce different amplitudes of displacement, and the displacements of different amplitudes can make the load-bearing ring plate 3 produce sliding swings of different amplitudes. The displacements of different amplitudes can make the return push rod 6-3 be pushed into the sleeve 6-2 to different distances. The different distances the return push rod 6-3 is pushed in can make the stored force of the return spring 6-4 different. The different stored force of the return spring 6-4 can make the vibration of the load-bearing ring plate 3 hitting the end of the sliding push rod 7-2 away from the rotating plate 7-1 different, thereby more accurately simulating the situation of the joint bearing in actual daily use.

[0034] Refer to the attached Figures 1 to 6 : The front end of the bearing ring plate 3 is provided with an arc groove 7-4 located between the bosses 7-3 and corresponding to the sliding push rod 7-2. The arc groove 7-4 is located on the revolution path of the sliding push rod 7-2. The width of the arc groove 7-4 is greater than the diameter of the sliding push rod 7-2, so that the arc groove 7-4 can accommodate the sliding push rod 7-2. The purpose of opening the arc groove 7-4 is to prevent the bearing ring plate 3 from hitting the end of the sliding push rod 7-2 away from the rotating plate 7-1 during the resetting process after the sliding push rod 7-2 rotates around the boss 7-3. The arc groove 7-4 is used to release the inertial force generated by the load-bearing ring plate 3 being pushed by the return spring 6-4. During the release of the inertial force, the load-bearing ring plate 3 will produce low-frequency and long-duration vibrations, which will be transmitted to the joint bearing to simulate other situations encountered by the joint bearing in actual daily use. For example, when the joint bearing is installed on a ship, the ship is prone to low-frequency and long-duration shaking during driving. Of course, the setting of the arc groove 7-4 is optional, and the arc groove 7-4 can be opened or not according to the situation.

[0035] Refer to the attached Figures 1 to 6: Several retaining members 8 are provided at both ends of the load-bearing ring plate 3 to prevent the outer ring of the joint bearing from falling off the load-bearing ring plate 3. The retaining members include a pair of positioning blocks 8-1 arranged on both sides of the load-bearing ring plate 3. The upper half of the positioning block 8-1 is located on both sides of the load-bearing ring plate 3, and the lower half of the positioning block 8-2 is located on both sides of the outer ring of the joint bearing. The positioning block 8-1 limits the outer ring of the joint bearing by pressing against both sides of the outer ring of the joint bearing to prevent the joint bearing from falling off the load-bearing ring plate 3. The positioning block 8-1 and the load-bearing ring plate 3 are detachably connected by positioning screws 8-2.

[0036] See attached Figures 1 to 6 A dynamic pressure device 9 for applying different pressures to the transmission shaft 4 is fixedly installed on the bottom plate 1, and the dynamic pressure device includes a pair of vertical rods 9-1 fixed to the top of the bottom plate 1, the pair of vertical rods 9-1 are located between the stabilizing plate 10 and the rotating plate 7-1, the pair of vertical rods 9-1 are respectively arranged on both sides of the transmission shaft 4, a pressure plate 9-2 slidably connected to the pair of vertical rods 9-1, the pressure plate 9-2 is arranged below the transmission shaft 4, and a pressure regulating spring 9-3 is located between the pressure plate 9-2 and the bottom plate 1 and surrounds the vertical rod 9-1, and the pressure regulating spring 9-3 One end is fixedly connected to the bottom of the pressure plate 9-2, and the other end of the pressure regulating spring 9-3 is fixedly connected to the bottom plate 1. The pressure regulating spring 9-3 supports the pressure plate 9-2 and is fixed to the outside of the transmission shaft 4 and presses against the hook-shaped rotating block 9-4 on the top of the pressure plate 9-2. The hook-shaped rotating block 9-4 is in the shape of a comma or a magatama, and can also be a cam structure. The hook-shaped rotating block 9-4 rotates with the transmission shaft 4 to push the pressure plate 9-2 up and down. When the hook-shaped rotating block 9-4 rotates clockwise to the protruding part, the pressure applied by the pressure plate 9-2 to the hook-shaped rotating block 9-4 reaches the maximum.

[0037] A method for testing spherical bearings:

[0038] 1. Rotation test: First, install the motor on the bottom plate 1, install the driving gear that matches the driven gear 11 on the motor output shaft, start the motor to drive the output shaft 4 to rotate, and the rotation of the output shaft 4 drives the inner ring of the spherical bearing that has an interference fit with it to rotate;

[0039] 2. Sliding test: The rotation of the transmission shaft 4 drives the rotating plate 7-1 to rotate, and the rotation of the rotating plate 7-1 drives the sliding push rod 7-2 to revolve around the transmission shaft 4. The boss 7-3 array is distributed on the revolution path of the sliding push rod 7-2. When the sliding push rod 7-2 revolves, it pushes the boss 7-3 to move. After the boss 7-3 moves, it pushes the bearing ring plate 3 to slide. After the bearing ring plate 3 slides, it pushes the return push rod 6-3 into the sleeve 6-2, and the return spring 6-4 accumulates force. When the sliding push rod 7-2 revolves and leaves the boss 7-3, the return spring 6-4 releases the elastic force, and the return push rod 6-3 pushes the bearing ring plate 3 to return to the center, and makes the bearing ring plate 3 hit the sliding push rod 7-2 to generate high-frequency and short-time vibration. The sliding push rod 7-2 pushes multiple bosses 7-3 in turn through the revolution, which can realize pushing the bearing ring plate 3 to slide from multiple different angles, and the sliding amplitude of the bearing ring plate 3 can also be changed by setting bosses 7-3 of different sizes;

[0040] 3. Advanced test: The arc groove 7-4 is set on the revolution path of the sliding push rod 7-2. When the sliding push rod 7-2 revolves away from the boss 7-3, the sliding push rod 7-2 revolves to correspond to the arc groove 7-4, and the return spring 6-4 releases its elastic force to push the bearing ring plate 3 to return to the center. The bearing ring plate 3 does not contact the sliding push rod 7-2 during the return process, thereby generating low-frequency and long-term vibration;

[0041] 4. Pressure test: The output shaft 4 rotates to drive the hook-shaped rotating block 9-4 to rotate. The hook-shaped rotating block 9-4 pushes the pressure plate 9-2 to move up and down. The pressure plate 9-2 descends and compresses the pressure-adjusting spring 9-3. The pressure-adjusting spring 9-3 gradually increases the pressure on the hook-shaped rotating block 9-4. The pressure plate 9-2 rises and releases the pressure-adjusting spring 9-3. The pressure-adjusting spring 9-3 gradually reduces the pressure on the hook-shaped rotating block 9-4. The hook-shaped rotating block 9-4 transmits the pressure it receives to the output shaft 4, and the output shaft 4 applies pressure to the inner ring of the spherical bearing.

[0042] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A spherical plain bearing testing device, comprising a base plate (1), a detection table plate (2) fixedly mounted on the base plate (1), a bearing ring plate (3) mounted on the detection table plate (2) and sleeved on the outer ring of the spherical plain bearing, and a transmission shaft (4) having an interference fit with the inner ring of the spherical plain bearing and capable of driving the inner ring of the spherical plain bearing to rotate; wherein: The detection table (2) is provided with a through detection channel (5), the inner wall of the detection channel (5) is provided with an inner spherical surface (5a), the outer side of the bearing ring plate (3) is provided with an outer spherical surface (3a) matching the inner spherical surface (5a), the bottom plate (1) is provided with an elastic return member (6) pressed against the rear end of the bearing ring plate (3), and the transmission shaft (4) is provided with a push test member (7) capable of pushing the bearing ring plate (3) to slide from multiple positions.

2. The spherical bearing testing device according to claim 1 is characterized in that: The elastic return member (6) comprises a support plate (6-1) fixed on the bottom plate (1), a plurality of sleeves (6-2) fixed on the support plate (6-1), a return push rod (6-3) slidably connected in the sleeve (6-2) and pressing against the rear end of the bearing ring plate (3), and a return spring (6-4) installed in the sleeve (6-2) and capable of applying pressure to the return push rod (6-3).

3. The spherical bearing testing device according to claim 1 is characterized in that: The push test piece (7) comprises a rotating plate (7-1) fixed on the outside of the transmission shaft (4) and rotating with the transmission shaft (4), a sliding push rod (7-2) fixed on the rotating plate (7-1) and driven by the rotating plate (7-1) to revolve around the transmission shaft (4), and a boss (7-3) arranged at the front end of the bearing ring plate (3) and corresponding to the sliding push rod (7-2), wherein one end of the sliding push rod (7-2) away from the rotating plate (7-1) abuts against the front end of the bearing ring plate (3), and when the sliding push rod (7-2) revolves, it drives the bearing ring plate (3) to slide by pushing the boss (7-3).

4. The spherical bearing testing device according to claim 3 is characterized in that: The bosses (7-3) are arranged in a plurality and are evenly distributed in an array at the front end of the bearing ring plate (3); the bosses (7-3) are hemispherical; one end of the sliding push rod (7-2) away from the rotating plate (7-1) is arranged in an arc shape that matches the hemispherical shape of the boss (7-3) so as to reduce the resistance of the sliding push rod (7-2) in pushing the boss (7-3).

5. The spherical bearing testing device according to claim 4 is characterized in that: The plurality of bosses (7-3) are configured as hemispherical shapes of different sizes, and the sliding push rod (7-2) drives the bearing ring plate (3) to slide with different amplitudes when pushing bosses (7-3) of different sizes in turn.

6. The spherical bearing testing device according to claim 5, characterized in that: The front end of the bearing ring plate (3) is provided with an arc-shaped groove (7-4) located between the bosses (7-3) and corresponding to the sliding push rod (7-2), and the width of the arc-shaped groove (7-4) is greater than the diameter of the sliding push rod (7-2).

7. The spherical bearing testing device according to claim 1 is characterized in that: A plurality of retaining members (8) for preventing the outer ring of the spherical bearing from falling off the bearing ring plate (3) are provided at both ends of the bearing ring plate (3); the retaining members include a pair of positioning blocks (8-1) arranged on both sides of the bearing ring plate (3); positioning screws (8-2) are used to detachably fix the positioning blocks (8-1) on the bearing ring plate (3); and the positioning blocks (8-1) limit the outer ring of the spherical bearing by abutting against both sides of the outer ring of the spherical bearing.

8. The spherical bearing testing device according to claim 1, characterized in that: A dynamic pressure-applying device (9) for applying different pressures to the transmission shaft (4) is fixedly mounted on the base plate (1), the dynamic pressure-applying device comprising a pair of vertical rods (9-1) fixed to the top of the base plate (1), a pressure plate (9-2) slidably connected to the pair of vertical rods (9-1), a pressure-adjusting spring (9-3) located between the pressure plate (9-2) and the base plate (1) and surrounding the vertical rods (9-1), and a hook-shaped rotating block (9-4) fixed to the outside of the transmission shaft (4) and resting against the top of the pressure plate (9-2), wherein the hook-shaped rotating block (9-4) rotates with the transmission shaft 4 to push the pressure plate (9-2) up and down.

9. The spherical bearing testing device according to claim 1, characterized in that: A stabilizing plate (10) located in front of the detection table (2) and supporting the transmission shaft (4) is fixedly mounted on the bottom plate (1), and a driven gear (11) for cooperating with the motor to drive the transmission shaft 4 to rotate is fixedly mounted on the outside of the transmission shaft (4).

10. A testing method for a spherical bearing testing device according to claim 1, characterized in that:

1. Rotation test: First, install the motor on the base plate (1), install the driving gear that matches the driven gear (11) on the motor output shaft, start the motor to drive the output shaft (4) to rotate, and the rotation of the output shaft (4) drives the inner ring of the spherical bearing that has an interference fit with it to rotate; 2. Sliding test: The transmission shaft (4) rotates to drive the rotating plate (7-1) to rotate, and the rotating plate (7-1) rotates to drive the sliding push rod (7-2) to revolve around the transmission shaft (4). The bosses (7-3) are arranged in an array on the revolving path of the sliding push rod (7-2). When the sliding push rod (7-2) revolves, it pushes the bosses (7-3) to move. After the bosses (7-3) move, they push the bearing ring plate (3) to slide. After the bearing ring plate (3) slides, it pushes the return push rod (6-3) to be retracted into the sleeve (6-2), and the return spring (6-4) accumulates force. When the sliding push rod (7-2) revolves away from the boss (7-3), the return spring (6-4) releases its elastic force, and the return push rod (6-3) pushes the bearing ring plate (3) to return to the original position, and causes the bearing ring plate (3) to collide with the sliding push rod (7-2) to generate high-frequency and short-time vibration. The sliding push rod (7-2) pushes the plurality of bosses (7-3) in turn through the revolving movement, and can push the bearing ring plate (3) to slide from a plurality of different angles. The sliding amplitude of the bearing ring plate (3) can also be changed by setting bosses (7-3) of different sizes.

3. Advanced test: The arc groove (7-4) is arranged on the revolution path of the sliding push rod (7-2). When the sliding push rod (7-2) revolves away from the boss (7-3), the sliding push rod (7-2) revolves to correspond to the arc groove (7-4), and the return spring (6-4) releases its elastic force to push the bearing ring plate (3) back to the original position. The bearing ring plate (3) does not contact the sliding push rod (7-2) during the return process, thereby generating low-frequency and long-term vibration; 4. Pressure test: The output shaft (4) rotates to drive the hook-shaped rotating block (9-4) to rotate. The hook-shaped rotating block (9-4) pushes the pressure plate (9-2) to move up and down. The pressure plate (9-2) descends to compress the pressure regulating spring (9-3). The pressure regulating spring (9-3) gradually increases the pressure on the hook-shaped rotating block (9-4). The pressure plate (9-2) rises to release the pressure regulating spring (9-3). The pressure regulating spring (9-3) gradually reduces the pressure on the hook-shaped rotating block (9-4). The hook-shaped rotating block (9-4) transmits the pressure to the output shaft (4). The output shaft (4) applies pressure to the inner ring of the spherical bearing.

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