Shock absorber bearing water absorption test tooling

Abstract

The application provides a shock absorber bearing mud water test tool, which comprises a rotating base installed corresponding to a bearing inner ring to be tested, a bearing upper seat fixedly installed corresponding to a bearing outer ring to be tested, the rotating base is connected with a driving device for driving the rotating base to rotate, the mounting surface of the bearing upper seat is installed corresponding to the inclined surface structure of the bearing outer ring to be tested, the bearing upper seat is connected with a loading adapter disc for loading or unloading, the upper end surface of the bearing upper seat is provided with a vertical stress structure for vertically downwardly bearing the load applied by the loading adapter disc, the driving device cooperates with the rotating base to be provided with a nozzle base, the nozzle base is provided with a nozzle component for simulating a mud water scene, so that the mud water test is carried out by water spraying under the rotation of the bearing inner ring to be tested, the working condition in the mud water environment in actual application can be simulated, the running condition of the shock absorber bearing under the conditions of mud water and wind sand before assembly is simulated to test the service life of the shock absorber bearing under these conditions.

Description

Technical Field

[0001] This invention relates to a testing fixture for mud and water in shock absorber bearings. Background Technology

[0002] Automotive shock absorbers are elastic connection components that transmit force between the wheels and the vehicle body. Their main function is to suppress the oscillations caused by the rebound after the spring absorbs shocks and to mitigate impacts from the road surface. They accelerate the attenuation of vibrations in the chassis and body, thereby improving ride comfort. The shock absorber bearing, located above the shock absorber spring, provides support. During actual operation, the shock absorber bearing must maintain a tight seal to prevent mud and water from entering the bearing through the sealing lip during driving in muddy or wet environments. This would affect the bearing's lifespan and ultimately the shock absorber's damping performance.

[0003] Shock absorber bearings consist of an inner ring, an outer ring, a cage, and balls. During performance verification of automotive shock absorber bearings, the rolling balls crush dust particles, which in turn cause indentation damage to the ball surfaces. Over long-term use, this can lead to pits on the outer wall of the balls and the inner wall of the bearing rings, affecting bearing performance. Therefore, mud and water tests are necessary to predict bearing performance and optimize the bearing accordingly, providing recommended service life for users. In practical applications, the tooling used for installing shock absorber bearings often experiences force misalignment during testing due to the inclined structure at one end of the bearing's axial direction. This results in one inner ring being fixed while the other rotates, causing damage to the bearing sidewalls from the drive mechanism. This significantly differs from actual application conditions, reducing the accuracy and reliability of the test results. Summary of the Invention

[0004] To address the shortcomings of existing technologies, this invention provides a mud and water testing fixture for shock absorber bearings.

[0005] To achieve the above objectives, the present invention provides a mud and water testing fixture for shock absorber bearings, comprising a rotating base mounted on the inner ring of the bearing under test and a bearing upper seat fixedly mounted on the outer ring of the bearing under test. The rotating base is connected to a driving device for rotating it. With the outer ring of the bearing under test fixed on the bearing upper seat, the rotating base can drive the inner ring of the bearing under test to rotate. The mounting surface of the bearing upper seat is adapted to the inclined structure of the outer ring of the bearing under test. The bearing upper seat is connected to a loading adapter for loading or unloading. The upper end face of the bearing upper seat is provided with a vertical force structure for ensuring that the load applied by the loading adapter is perpendicularly downward. The driving device, in conjunction with the rotating base, is provided with a nozzle base. The nozzle base is provided with a nozzle component for simulating a mud and water scenario, so as to conduct a mud and water test by spraying water while the inner ring of the bearing under test rotates.

[0006] The beneficial effects of this invention are as follows: The structure of this invention fixes the outer ring of the bearing under test in the bearing seat, and drives the rotating base through the driving device, so that the outer ring and inner ring rotate relative to each other. The balls between the upper and lower rings continue to roll. The nozzle component sprays mud or water onto the bearing under test. The mud or water flows downward or settles. Through the loading adapter and the vertical force structure that applies the load of the loading adapter vertically downward, the bearing seat can bear the load of the loading adapter. This prevents the inner and outer rings from colliding with each other during the relative rotation of the bearing under test when it is under pressure, thus simulating the rotation of the direction of a car. This makes the test closer to the actual working conditions, thereby improving the accuracy of the test and obtaining more accurate and realistic test results. It can simulate the working conditions in the mud and water environment in actual applications, and simulate the operation of the shock absorber bearing under mud, water and sand conditions before assembly to test its service life under these environments.

[0007] Furthermore, the vertical force-bearing structure includes a conical washer with a central hole and a spherical washer adapted to be inserted into the conical washer. The inner wall of the central hole of the conical washer is conical with its central hole facing downward, and the conical orientation of the central hole is consistent with the axial direction of the bearing under test. The spherical washer is correspondingly inserted into the outer wall of the conical washer and is spherically shaped. The spherical washer is connected to the loading adapter plate through a connecting block. The load applied by the loading adapter plate is subjected to vertical downward force through the spherical washer and the conical washer.

[0008] By adopting the above technical solution, the inner wall of the central hole of the tapered bearing is tapered downwards, and its tapered direction is vertically downwards and consistent with the axial direction of the bearing under test. This prevents the load applied by the loading adapter to the bearing seat from shifting. The offset of the insertion relationship between the spherical washer and the tapered bearing can be ensured by the insertion of the outer spherical wall of the spherical washer into the tapered central hole, so that the force is always vertically downwards. Thus, during the mud and water test, the bearing under test is subjected to balanced and stable forces, and there will be no mutual crushing between the outer ring and the inner ring, thereby improving the accuracy of the test.

[0009] Furthermore, the rotating base is provided with an annular retaining edge corresponding to the installation of the bearing under test. The annular retaining edge is adapted to be inserted into the inner ring of the bearing under test. An opening is provided on one side of the annular retaining edge. An eccentric mounting groove for mounting a tapered washer is provided on the upper end face of the bearing seat. The tapered washer and the spherical washer are eccentrically mounted on the bearing seat through the mounting groove. The support of the bearing corresponding to the annular retaining edge and the spherical washer and the tapered washer are located on the same side in the vertical direction.

[0010] By adopting the above technical solution, the rotating base is adapted to the inner ring of the bearing under test with an annular retaining edge. One side of the annular retaining edge is provided with an opening to allow the mud and water to flow out, preventing the mud and water from accumulating on the rotating base. The upper end face of the bearing seat is eccentrically provided with an installation groove for installing a conical washer. The conical washer and the spherical washer are located on the same side of the bearing support corresponding to the annular retaining edge through the installation groove, so that the load applied by the loading adapter plate is balanced with the supporting force of the annular retaining edge, so as to prevent uneven force in the vertical direction from causing the installation of the bearing under test to be offset, and to keep the bearing under test stable under pressure.

[0011] Furthermore, a plug-in structure is provided between the driving device and the rotating base. The plug-in structure includes a boss at the center of the upper end face of the driving device and a mounting hole provided on the rotating base corresponding to the boss. The mounting hole and the boss form a plug-in fit. The connection between the boss and the upper end face of the driving device is chamfered.

[0012] By adopting the above technical solution, the mounting holes of the rotating base and the boss form a plug-in fit, which can make the connection between the drive device and the rotating base stable. The connection of the boss is chamfered, which can ensure smooth installation during the installation process and prevent damage to the rotating base and the drive device during the installation process.

[0013] Furthermore, a stop pin is provided through the bearing seat, one end of which passes through and abuts against the outer ring of the bearing to be tested, and the other end of which extends toward the loading adapter.

[0014] By adopting the above technical solution, the stop pin installed on the bearing seat passes through and locks the outer ring of the bearing under test, ensuring that the bearing seat and the bearing under test are installed stably and will not rotate relative to each other. In addition, the stop pin and the corresponding outer ring of the bearing under test can also play a positioning and installation role.

[0015] Furthermore, a limiting screw is provided between the loading adapter and the bearing seat, and the bearing seat is provided with a threaded hole corresponding to the limiting screw to maintain the relative position of the loading adapter and the bearing seat.

[0016] By adopting the above technical solution, the limiting screws connected between the loading adapter and the bearing seat, and the threaded holes opened on the loading adapter and the bearing seat respectively, the limiting screws with the two threaded holes aligned can connect the loading adapter and the bearing seat as one unit, restricting their rotation, but preventing vertical up and down movement. With the help of the stop pin, the mounting structure of the outer ring of the corresponding bearing under test is integrated and will not rotate relative to each other.

[0017] Furthermore, the nozzle component includes a plurality of mud and water nozzles evenly distributed circumferentially on the nozzle base, and a nozzle bracket for supporting the mud and water nozzles. The mud and water nozzles are slidably connected to the support surface of the nozzle bracket. The support surface of the nozzle bracket is inclined relative to the nozzle base and faces the bearing to be tested.

[0018] By adopting the above technical solution, the nozzle component, which includes several circumferentially evenly distributed mud and water nozzles on the nozzle base, can spray water or mud and sand in all directions on the bearing under test, thereby improving the coverage of the mud and water nozzle spray on the bearing under test. The mud and water nozzles are slidably connected to the inclined support surface of the nozzle bracket, which can increase the spray range of the mud and water nozzles and can be adjusted according to actual needs. The inclined support surface allows the spray material in the mud and water nozzles to travel a longer spray distance after being sprayed out, so that the sand grains can be turned into mud and sand as much as possible, thus increasing the utilization rate.

[0019] Furthermore, the nozzle bracket includes a support portion having the support surface and mounting the mud and water nozzle, and a mounting portion having an angle between the support portion and the mounting portion. The support portion has an elongated groove, and the mud and water nozzle is slidably disposed in the elongated groove. The mud and water nozzle can move closer to or further away from the nozzle base through the elongated groove.

[0020] By adopting the above technical solution, the included angle between the support part and the mounting part makes the support surface face the bearing to be tested, that is, the axis of the nozzle bracket, so that the mud and water nozzle sprays the material towards the axis during the simulation. The nozzle can be adjusted to be close to or away from the nozzle base in the long groove, which improves convenience and applicability.

[0021] Furthermore, the nozzle base is provided with an installation structure corresponding to the mounting part. The installation structure includes a plurality of mounting holes arranged in the radial direction of the nozzle base. The mounting part has a through groove that cooperates with the plurality of mounting holes. The mounting part can move in the radial direction of the nozzle base through the through groove and the mounting with different mounting holes.

[0022] By adopting the above technical solution, the nozzle base has several mounting holes arranged in the radial direction, and the nozzle base mounting part has a through groove that cooperates with the several mounting holes to move in the radial direction of the nozzle base, thereby increasing the installation range and adjusting different spray distances of the mud and water nozzle to simulate different degrees of mud and water tests. Attached Figure Description

[0023] Figure 1 This is a schematic diagram of the three-dimensional structure in an embodiment of the present invention;

[0024] Figure 2This is a schematic diagram of the exploded structure in an embodiment of the present invention;

[0025] Figure 3 This is a schematic diagram of the exploded structure at the bottom in an embodiment of the present invention. Detailed Implementation

[0026] The embodiments of the present invention will be further described below with reference to the accompanying drawings: Figure 1-3 As shown, the shock absorber bearing mud and water test fixture includes a rotating base 1 corresponding to the inner ring of the bearing under test and a bearing upper seat 3 fixedly installed corresponding to the outer ring of the bearing under test. The rotating base 1 is connected to a drive device 2 to drive its rotation. With the outer ring of the bearing under test fixed on the bearing upper seat 3, the rotating base 1 can drive the inner ring of the bearing under test to rotate. The mounting surface of the bearing upper seat 3 is adapted to the inclined structure of the outer ring of the bearing under test. The bearing upper seat 3 is connected to a loading adapter 4 for loading or unloading. The upper end face of the bearing upper seat 3 is provided with a vertical force structure 5 for making the load applied by the loading adapter 4 vertically downward. The drive device 2 is equipped with a nozzle base 6 in conjunction with the rotating base 1. The nozzle base 6 is provided with a nozzle component 7 for simulating a mud and water scenario, so as to conduct a mud and water test by spraying water when the inner ring of the bearing under test rotates.

[0027] The vertical force-bearing structure 5 includes a conical washer 8 with a central hole and a spherical washer 9 adapted to be inserted into the conical washer 8. The inner wall of the central hole of the conical washer 8 is conical with its central hole facing downward. The conical orientation of the central hole is consistent with the axial direction of the bearing to be tested. The spherical washer 9 is inserted into the outer wall of the conical washer 8 and is spherically shaped. The spherical washer 9 is connected to the loading adapter 4 through a connecting block 10. The load applied by the loading adapter 4 is subjected to vertical downward force through the spherical washer 9 and the conical washer 8.

[0028] The rotating base 1 is provided with an annular retaining edge 11 for mounting the bearing to be tested. The annular retaining edge 11 is adapted to be inserted into the inner ring of the bearing to be tested. An opening 12 is provided on one side of the annular retaining edge 11. An mounting groove 13 for mounting a conical washer 8 is provided eccentrically on the upper end face of the bearing seat 3. The conical washer 8 and the spherical washer 9 are eccentrically mounted on the bearing seat 3 through the mounting groove 13. The support of the bearing corresponding to the annular retaining edge 11 is located on the same side in the vertical direction as the spherical washer 9 and the conical washer 8.

[0029] A plug-in structure is provided between the driving device 2 and the rotating base 1. The plug-in structure includes a boss 14 at the center of the upper end face of the driving device 2 and a mounting hole 15 provided on the rotating base 1 corresponding to the boss 14. The mounting hole 15 and the boss 14 form a plug-in fit. The connection between the boss 14 and the upper end face of the driving device 2 is chamfered.

[0030] A stop pin 16 is provided through the bearing seat 3. One end of the stop pin 16 passes through and abuts against the outer ring of the bearing to be tested, and the other end of the stop pin 16 extends toward the loading adapter 4.

[0031] A limiting screw 17 is provided between the loading adapter plate 4 and the bearing upper seat 3. The bearing upper seat 3 is provided with a threaded hole 18 corresponding to the limiting screw 17 to maintain the relative position of the loading adapter plate and the bearing upper seat 3.

[0032] The nozzle component 7 includes a plurality of mud and water nozzles 19 evenly distributed circumferentially on the nozzle base 6 and a nozzle bracket 20 for supporting the mud and water nozzles 19. The mud and water nozzles 19 are slidably connected to the support surface 21 of the nozzle bracket 20. The support surface 21 of the nozzle bracket 20 is inclined relative to the nozzle base 6 and is oriented towards the bearing to be tested.

[0033] The nozzle support 20 includes a support part 22 on which the support surface 21 is provided and the nozzle is installed, and a mounting part 23 on the nozzle base 6. There is an angle between the support part 22 and the mounting part 23. The support part 22 has an elongated groove 24. The mud and water nozzle 19 is slidably disposed in the elongated groove 24. The mud and water nozzle 19 can move closer to or further away from the nozzle base 6 through the elongated groove 24.

[0034] The nozzle base 6 is provided with an installation structure corresponding to the mounting part 23. The installation structure includes a plurality of mounting holes 25 arranged in the radial direction of the nozzle base 6. The mounting part 23 is provided with a through groove 26 that cooperates with the plurality of mounting holes 25. The mounting part 23 can move in the radial direction of the nozzle base 6 through the through groove 26 and the mounting with different mounting holes 25.

[0035] The above embodiments are merely one preferred embodiment of the present invention. Ordinary variations and substitutions made by those skilled in the art within the scope of the technical solution of the present invention are all included within the protection scope of the present invention.

Claims

1. A testing fixture for mud and water in shock absorber bearings, characterized in that: The system includes a rotating base mounted on the inner ring of the bearing under test and a bearing seat fixedly mounted on the outer ring of the bearing under test. The rotating base is connected to a drive device that rotates it. With the outer ring of the bearing under test fixed on the bearing seat, the rotating base can drive the inner ring of the bearing under test to rotate. The mounting surface of the bearing seat is adapted to the inclined structure of the outer ring of the bearing under test. The bearing seat is connected to a loading adapter plate for loading or unloading. The upper end face of the bearing seat is provided with a vertical force-bearing structure to ensure that the load applied by the loading adapter plate is perpendicularly downward. The drive device works in conjunction with the rotating base. The system includes a nozzle base with nozzle components designed to simulate a muddy water scenario, allowing for muddy water testing by spraying water while the inner ring of the bearing under test rotates. The vertical load-bearing structure comprises a conical washer with a central hole and a spherical washer fitted onto the conical washer. The inner wall of the central hole of the conical washer is conical with its central hole facing downwards, and the conical shape of the central hole aligns with the axial direction of the bearing under test. The spherical washer is fitted onto the outer wall of the conical washer and is spherically shaped. The spherical washer is connected to the loading adapter plate via a connecting block. The load applied by the loading adapter plate is transmitted through the spherical washer. The face washers and conical washers are subjected to vertical downward force. The rotating base has an annular retaining edge corresponding to the bearing under test. The annular retaining edge is fitted and inserted into the inner ring of the bearing under test. An opening is provided on one side of the annular retaining edge. An eccentric mounting groove for the conical washer is provided on the upper surface of the bearing seat. The conical washer and spherical washer are eccentrically mounted on the bearing seat through the mounting groove. The annular retaining edge, the bearing support, and the spherical and conical washers are located on the same side in the vertical direction. A plug-in structure is provided between the driving device and the rotating base. The plug-in structure includes a driving mechanism. The device has a boss at the center of its upper surface and mounting holes on the rotating base corresponding to the boss. The mounting holes and the boss are interlocked. The connection between the boss and the upper surface of the drive device is chamfered. A stop pin is provided through the bearing seat. One end of the stop pin passes through and abuts against the outer ring of the bearing to be tested, and the other end of the stop pin extends toward the loading adapter. A limit screw is provided between the loading adapter and the bearing seat. The bearing seat has a threaded hole corresponding to the limit screw to maintain the relative position of the loading adapter and the bearing seat.

2. The damper bearing mud and water testing fixture according to claim 1, characterized in that: The nozzle component includes a plurality of mud and water nozzles evenly distributed circumferentially on the nozzle base and a nozzle bracket for supporting the mud and water nozzles. The mud and water nozzles are slidably connected to the support surface of the nozzle bracket. The support surface of the nozzle bracket is inclined relative to the nozzle base and faces the bearing to be tested.

3. The damper bearing mud and water testing fixture according to claim 2, characterized in that: The nozzle bracket includes a support part with the support surface and the mud and water nozzle mounted thereon, and a mounting part on the nozzle base. There is an angle between the support part and the mounting part. The support part has an elongated groove. The mud and water nozzle is slidably disposed in the elongated groove. The mud and water nozzle can move closer to or further away from the nozzle base in the elongated groove.

4. The damper bearing mud and water testing fixture according to claim 3, characterized in that: The nozzle base is provided with a mounting structure corresponding to the mounting part. The mounting structure includes a plurality of mounting holes arranged in the radial direction of the nozzle base. The mounting part has a through groove that cooperates with the plurality of mounting holes. The mounting part can move in the radial direction of the nozzle base through the through groove and the mounting holes.

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