A two-way compensation bearing test tooling

Abstract

The present invention provides a test tooling for a two-way compensation bearing, which includes a driving shaft system installed on a test bench. The driving shaft system includes a test rotating shaft. An adjusting mechanism is also installed on the test bench. A test bearing seat is installed on the test bench through the adjusting mechanism. The bearing to be tested is sleeved on the corresponding installation section of the test rotating shaft and installed in the test bearing seat. The axial position and swing angle of the bearing to be tested can be changed through the telescopic push-pull structure on the adjusting mechanism. The motion test tooling for the two-way compensation bearing provided by the present invention can simulate various complex motion conditions of the two-way compensation bearing, providing an experimental basis for determining whether the working performance of the two-way compensation bearing is qualified, and filling the blank in the prior art of lacking a motion simulation tooling for the two-way compensation bearing.

Description

Technical Field

[0001] The present invention relates to the field of bearing testing, and particularly to a two-way compensation bearing testing tooling. Background Art

[0002] A two-way compensation bearing is a bearing with angular and axial compensation capabilities. As Figure 10 shown, the two-way compensation bearing 10 includes two outer rings and an inner ring whose length is longer than that of the outer rings. Its rolling elements 20 and rolling element cage 19 are arranged between the inner ring 18 and the first outer ring 17. The second outer ring 16 is sleeved on the first outer ring 17, and the outer side surface of the first outer ring 17 and the inner side surface of the second outer ring 16 are spherical surfaces. When the two-way compensation bearing is in use, the bearing seat clamps the second outer ring 16 and can drive the second outer ring 16 to swing within a certain angle along the outer spherical surface of the first outer ring 17. At the same time, the bearing seat can drive the second outer ring 16, the first outer ring 17, the rolling element cage 19 and the rolling elements to axially move along the inner ring 18 within the moving range, and in the above two usage cases, the inner ring 18 can rotate normally; therefore, due to the special structure, the two-way compensation bearing can work normally when it swings a certain angle or axially moves a certain distance.

[0003] However, in the prior art, there is a lack of a testing tooling that can simulate the operating conditions of a two-way compensation bearing. Common bearing detection test equipment is difficult to simulate the motion state of a two-way compensation bearing. Therefore, it is impossible to determine whether the working performance of a two-way compensation bearing meets the standard through a test. Summary of the Invention

[0004] The purpose of the present invention is to provide a two-way compensation bearing testing tooling to solve the problem that there is no dedicated testing tooling for simulating the operating conditions of a two-way compensation bearing in the prior art, and the working performance of a two-way compensation bearing cannot be accurately tested.

[0005] To achieve the above purpose, the present invention provides a two-way compensation bearing testing tooling, which includes a test bench and a drive shaft system installed on the test bench. The drive shaft system includes a test rotating shaft. One end of the test rotating shaft has an installation section for the bearing under test to be sleeved thereon. The test bench is also provided with a test bearing seat installed through an adjustment mechanism. The test bearing seat has an installation cavity for the second outer ring of the bearing under test to be inserted. The adjustment mechanism includes a set of telescopic push-pull structures. The set of telescopic push-pull structures includes two push-pull arms and two push arms. The end of the push arm facing the test bearing seat abuts against the test bearing seat. The end of the push-pull arm facing the test bearing seat is ball-jointed to the test bearing seat. The test bearing seat is an annular bearing seat. The ball-joint hinge points of the two push-pull arms and the test bearing seat are on the first diameter of the end face of the test bearing seat. The abutting points of the two push arms and the test bearing seat are on the second diameter of the end face of the test bearing seat. The first diameter and the second diameter are perpendicular.

[0006] Furthermore, the adjusting mechanism further includes an adjusting pedestal, on which there are threaded holes for the telescopic push-pull structure to pass through, and threaded sections that cooperate with the threaded holes are provided on the push-pull arm and the top-push arm of the telescopic push-pull structure.

[0007] Furthermore, the push-pull arm realizes a spherical hinge with the test bearing seat through a spherical plain bearing.

[0008] Furthermore, the push-pull arm includes a push-pull screw rod, and a smooth shaft section is provided at the end of the push-pull screw rod. The inner ring of the spherical plain bearing is sleeved on the smooth shaft section, and the outer ring of the spherical plain bearing is installed with a spherical plain bearing seat, and the spherical plain bearing seat is fixedly installed on the test bearing seat; there is a deflection gap between the push-pull screw rod and the spherical plain bearing seat.

[0009] Furthermore, a positioning shaft shoulder is provided at one end of the smooth shaft section, and an inner ring retaining ring is connected by a compression screw at the other end. The inner ring of the spherical plain bearing is fixed by the cooperation of the inner ring retaining ring and the positioning shaft shoulder. The spherical plain bearing seat includes a seat body and an outer ring retaining ring connected to the seat body by a compression screw. An outer ring retaining ring installation groove is provided on the seat body, and the groove wall of the outer ring retaining ring installation groove and the outer ring retaining ring cooperate to fix the outer ring of the spherical plain bearing. An installation hole for the end of the push-pull arm to extend into is provided on the test bearing seat, and the seat body is fixedly connected to the edge of the installation hole through the flange at the end.

[0010] Furthermore, the end of the top-push arm in contact with the test bearing seat is a ball head structure.

[0011] Furthermore, a radial loading mechanism is also installed on the test bench, and the loading direction of the radial loading mechanism extends along the first diameter or the second diameter.

[0012] Furthermore, the radial loading mechanism is directly above the test bearing seat and performs loading vertically downward.

[0013] Furthermore, a bearing retaining edge is provided at one end of the installation section of the test rotating shaft away from the adjusting mechanism, and a threaded hole is opened on the end face towards the adjusting mechanism. A measured bearing inner ring retaining ring is installed on the end face of the test rotating shaft towards the adjusting mechanism through a bolt to press the inner ring of the measured bearing. The adjusting pedestal is annular, and the inner diameter of its annular hole is larger than the diameter of the installation section of the test rotating shaft.

[0014] Beneficial effects:

[0015] The present invention pioneeringly provides a test tooling for a two-way compensation bearing, which includes a radial drive shaft system installed on a test bench. The drive shaft system includes a test rotating shaft. An adjusting mechanism is also installed on the test bench. An experimental bearing housing is installed on the test bench through the adjusting mechanism. The bearing to be tested is sleeved on the corresponding installation section of the test rotating shaft and installed in the experimental bearing housing. The axial position and swing angle of the bearing to be tested can be changed through the telescopic push-pull structure on the adjusting mechanism; The grouped telescopic push-pull structure includes two push-pull arms ball-jointed on the experimental bearing housing and two top-push arms abutted against the end face of the experimental bearing housing. The ball-jointed hinge points of the two push-pull arms and the experimental bearing housing are on the first diameter of the end face of the experimental bearing housing, and the abutting points of the two top-push arms and the experimental bearing housing are on the second diameter of the end face of the experimental bearing housing. The first diameter and the second diameter are perpendicular. The axial displacement of the experimental bearing housing is driven by the simultaneous and same-direction movement of the push-pull arms, and the angle deflection of the experimental bearing housing is changed by adjusting the telescopic length of the top-push arms; The motion test tooling for a two-way compensation bearing provided by the present invention can simulate various complex motion conditions of the two-way compensation bearing, provides an experimental basis for determining whether the working performance of the two-way compensation bearing is qualified, and fills the blank in the prior art of lacking a motion simulation tooling for the two-way compensation bearing. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic cross-sectional view of the overall assembly structure of a test tooling for a two-way compensation bearing;

[0017] Figure 2 It is a schematic cross-sectional view of the assembly structure of the adjusting mechanism of a test tooling for a two-way compensation bearing;

[0018] Figure 3 It is a schematic diagram of the assembly structure of the adjusting mechanism and the drive transmission mechanism of a test tooling for a two-way compensation bearing;

[0019] Figure 4 It is a schematic diagram of the axial compensation principle of a test tooling for a two-way compensation bearing;

[0020] Figure 5 It is a schematic diagram of the angular compensation principle of a test tooling for a two-way compensation bearing;

[0021] Figure 6 It is a schematic diagram of the structure of the push-pull arm;

[0022] Figure 7 It is a schematic diagram of the structure of the top-push arm;

[0023] Figure 8 It is a schematic cross-sectional view of the structure of the experimental bearing housing;

[0024] Figure 9 It is the front view of the experimental bearing housing;

[0025] Figure 10It is a schematic assembly structure diagram of the bidirectional compensation bearing to be tested.

[0026] In the figure: 1. Adjusting mechanism; 2. Radial loading mechanism; 3. Driving shaft system; 31. Test rotating shaft mounting seat; 32. Rotating bearing; 4. Test bearing seat; 5. Test bench; 6. Adjusting pedestal; 7. Push-pull arm; 71. Push-pull screw; 8. Outer ring retaining ring of the bearing to be tested; 81. Inner ring retaining ring of the bearing to be tested; 9. Thrust arm; 10. Bidirectional compensation bearing; 11. Spherical plain bearing seat; 111. Seat body; 12. Inner ring retaining ring of the spherical plain bearing; 13. Spherical plain bearing; 14. Outer ring retaining ring of the spherical plain bearing; 15. Test rotating shaft; 16. Second outer ring; 17. First outer ring; 18. Inner ring; 19. Rolling element cage; 20. Rolling element. Specific embodiments

[0027] The features and performance of the present invention will be further described in detail below in conjunction with embodiments.

[0028] The principle and concept of the present invention are that a test fixture is designed, which can drive the bidirectional compensation bearing to be tested to generate axial displacement and angular swing. The adjusting mechanism, radial loading mechanism, driving transmission mechanism and driving shaft system are integrally installed on the same test bench. The bidirectional compensation bearing to be tested is sleeved on the test rotating shaft, and the test rotating shaft is driven to rotate by the driving transmission mechanism; the adjusting mechanism is connected to the bearing seat of the bidirectional compensation bearing to be tested and adjusts the displacement and rotation of the bearing seat; the radial loading mechanism provides a radial load to the bearing seat; the bearing seat is adjusted to the displacement distance of the rotation angle required for the test through the adjusting mechanism, radially loaded to the bearing seat, and the driving transmission mechanism is started to drive the test rotating shaft to rotate, so as to better simulate the real motion conditions of the bidirectional compensation bearing.

[0029] Based on the above principle and concept, the present invention provides a bidirectional compensation bearing test fixture and various embodiments thereof for further illustration.

[0030] On the basis of the above principle, in a basic embodiment, as Figure 1 In the provided embodiment, a bidirectional compensation bearing test fixture provided by the present invention includes a test bench 5 and a driving shaft system 3 installed on the test bench 5. The driving shaft system 3 includes a test rotating shaft 15. The driving shaft system 3 includes a test rotating shaft mounting seat 31 installed on the test bench 5 on the right side of the adjusting mechanism 1. A rotating bearing 32 is also sleeved on the test rotating shaft 15. The test rotating shaft 15 has an installation section for the bearing under test to be sleeved thereon. The driving shaft system 3 is also connected with a driving transmission structure to drive the test rotating shaft 15 to rotate. The test bench 5 is also connected with a test bearing seat 4 through the adjusting mechanism 1. The test bearing seat 4 has an installation cavity for the second outer ring 16 of the bidirectional compensation bearing 10 to be tested to be inserted. The adjusting mechanism 1 includes a set of telescopic push-pull structures arranged along the axial direction of the test rotating shaft 15.

[0031] The grouped telescopic push-pull structure includes two push-pull arms 7 and two top-push arms 9. The push-pull arms 7 move simultaneously in the same direction to drive the test bearing seat 4 to move axially. The top-push arms 9 push different lengths respectively to drive the test bearing seat 4 to swing angularly, and the top-push arms 9 cooperate with the push-pull arms 7 to achieve swinging at more angles.

[0032] A two-way compensation bearing test tooling provided by the present invention can simulate various complex motion conditions of a two-way compensation bearing. The axial movement and angular swing of the two-way compensation bearing 10 are realized through the cooperation of the push-pull arm 7 and the top-push arm 9, providing accurate test data for determining whether the working performance of the two-way compensation bearing is qualified and improving the accuracy of the two-way compensation bearing test.

[0033] Based on the above embodiments, in one embodiment, as Figures 2 - 10 In the provided embodiment, the test bearing seat 4 is an annular bearing seat, and the grouped telescopic push-pull structure includes two push-pull arms 7 and two top-push arms 9. The hinge points of the two push-pull arms 7 and the test bearing seat 4 are on the first diameter of the annular test bearing seat 4, and the contact points of the two top-push arms 9 and the test bearing seat 4 are on the second diameter of the annular test bearing seat 4. The above two hinge points and two contact points are circumferentially and evenly arranged on the end face of the test bearing seat 4, and the first diameter is perpendicular to the second diameter.

[0034] Based on the above embodiments, in one embodiment, as Figures 2 - 10 In the provided embodiment, the adjusting mechanism 1 further includes an adjusting pedestal 6. Threaded holes for the telescopic push-pull structure to be installed on the adjusting pedestal 6 are provided on the adjusting pedestal 6. Threaded shaft sections that cooperate with the threaded holes are provided on the push-pull arms 7 and the top-push arms 9 of the telescopic push-pull structure. The push-pull arms 7 and the top-push arms 9 are screwed in or out along the axial direction of the test rotating shaft 15 on the adjusting pedestal 6, and drive the test bearing seat 4 and the one fixed on the test bearing seat 4 to move axially along the test rotating shaft 15 or swing angularly on the axis of the test rotating shaft 15; In another embodiment, through holes are provided on the adjusting pedestal 6, the push-pull arms 7 and the top-push arms 9 are optical shafts, and electric push rods are connected to the ends of the push-pull arms 7 and the top-push arms 9 far from the test bearing seat 4. The push-pull arms 7 and the top-push arms 9 are pushed or pulled to move along the axial direction of the test rotating shaft 15 through the electric push rods.

[0035] Based on the above embodiments, in one embodiment, as Figures 2 - 10 In the provided embodiment, a smooth shaft section for installing a spherical plain bearing 13 is provided on the push-pull arm 7, and the spherical plain bearing 13 is installed on the smooth shaft section. The push-pull arm 7 realizes a spherical hinge with the test bearing seat 4 through the spherical plain bearing 13; In another embodiment, the push-pull arm 7 is connected to the test bearing seat 4 through a universal coupling and realizes a spherical hinge.

[0036] Based on the above embodiments, in one embodiment, as Figures 2 - 10 In the provided embodiment, the push-pull arm 7 includes a push-pull screw 71. A smooth shaft section is provided at the end of the push-pull screw 71. An articulated bearing 13 is also sleeved on the smooth shaft section of the push-pull screw 71. The outer ring of the articulated bearing 13 is installed on the articulated bearing seat 11. The articulated bearing seat 11 is fixedly installed on the test bearing seat 4 by bolts, and there is a deflection gap between the push-pull screw 71 and the articulated bearing seat 11. The angular swing of the push-pull screw 71 is realized through the deflection gap and the articulated bearing seat 11.

[0037] Based on the above embodiments, in one embodiment, as Figures 2 - 10 In the provided embodiment, a positioning shaft shoulder is provided at one end of the smooth shaft section, and an inner ring retaining ring 12 of the articulated bearing is fixed at the other end by a compression screw. The inner ring retaining ring 12 of the articulated bearing cooperates with the positioning shaft shoulder to fix the inner ring of the articulated bearing. The articulated bearing seat 11 includes a seat body 111 and an outer ring retaining ring 14 of the articulated bearing connected to the seat body 111 by a compression screw. An installation groove for the outer ring retaining ring of the articulated bearing is provided on the seat body 111. The groove wall of the installation groove for the outer ring retaining ring of the articulated bearing and the outer ring retaining ring 14 of the articulated bearing cooperate to fix the outer ring of the articulated bearing. An installation hole for the push-pull arm 7 to extend into is also provided on the test bearing seat 4. The seat body 111 is fixedly connected to the edge of the installation hole through an end flange; in another embodiment, the seat body 111 is assembled in the installation hole on the test bearing seat 4 by interference fit, and the position and installation angle of the seat body 111 are fixed by the extrusion force of the interference fit; in another embodiment, the outer ring retaining ring 14 of the articulated bearing is in interference fit with the seat body 111, and the outer ring retaining ring 14 of the articulated bearing is fixed on the seat body 111 by the extrusion force of the interference fit.

[0038] Based on the above embodiments, in one embodiment, the pushing end of the pushing arm 9 for pushing the test bearing seat 4 to swing angularly is a flat head structure. In a more optimal embodiment, as Figure 5 、 Figure 7 In the provided embodiment, the end of the pushing arm 9 in contact with the test bearing seat 4 is a ball head structure, so as to avoid wearing the end face of the test bearing seat 4.

[0039] Based on the above embodiments, in one embodiment, as Figures 2 - 10 In the provided embodiment, a radial loading mechanism 2 is also installed on the test bench 5. By adjusting the rotation direction of the test bearing seat 4, the loading direction of the radial loading mechanism 2 is made the same as the first diameter or the second diameter, and the test bench 5 is coordinated to provide a radial load to the test bearing seat 4, preventing unstable loading caused by the deflection angle between the loading direction and the setting direction of the test bearing seat 4, and further damaging the test bearing seat 4; in another embodiment, the height of the test bench is compared with Figure 3The test bench 5 in it is lowered, and the mounting seat of the test bench for installing the radial loading mechanism can rotate around the axis of the test rotating shaft 15 and be fixed at any angle. The height of the test bench can meet the requirement of the radial loading mechanism 2 to apply radial pressure to the test bearing seat 4 within the range of 180° above the axis of the test rotating shaft 15. When the radial loading mechanism 2 is in a non-vertical loading condition, an additional support structure needs to be installed on the test bench to fix the test bearing seat 4. By rotating the radial loading mechanism 2, it is ensured that the loading direction of the radial loading mechanism 2 is the same as the first diameter or the second diameter.

[0040] Based on the above embodiments, in one embodiment, as Figures 2 - 10 In the provided embodiment, the radial loading mechanism 2 is installed directly above the test bearing seat 4 and inputs radial load to the test bearing seat 4 from top to bottom. The top of the test bearing seat 4 is set as a flat top structure, and the telescopic rod of the radial loading mechanism 2 is also a flat head structure, which is convenient for loading. In another embodiment, the telescopic rod of the radial loading mechanism 2 is horizontally arranged, perpendicular to the axis of the test rotating shaft 15 and facing the test bearing seat 4, and provides radial load to the test bearing seat 4 in the horizontal direction.

[0041] Based on the above embodiments, in one embodiment, as Figures 2 - 10 In the provided embodiment, a bearing edge is provided at one end of the installation section of the test rotating shaft 15 away from the adjusting mechanism 1. A threaded hole is opened on the end face of the test rotating shaft 15 facing the adjusting mechanism 1, and an inner ring retaining ring of the bearing under test is installed through a bolt. The inner ring of the two-way compensation bearing under test is pressed by the cooperation of the edge and the inner ring retaining ring of the bearing under test. Among them, the adjusting table base 6 is annular, and its aperture is larger than the shaft diameter of the installation end of the test rotating shaft 15, which is convenient for the test rotating shaft 15 to pass through the adjusting table base 6 and be installed in the test rotating shaft mounting seat 31. At the same time, it is convenient to install the inner ring retaining ring 81 of the bearing under test and the outer ring retaining ring 8 of the bearing under test on the test rotating shaft 15; as Figure 3 As shown, an installation groove is opened along the circumference of the annular adjusting table base 6, and the installation groove is installed in cooperation with the corresponding annular installation opening on the test bench 5. In another embodiment, to prevent the adjusting table base 6 from accidentally rolling circumferentially and causing damage to the overall test tooling, the adjusting table base 6 can be set as a square structure with circular holes, and an installation groove is opened along the circumference of the square adjusting table base 6. A square installation opening corresponding to the square adjusting table base 6 is provided on the test bench 5 to limit the circumferential rolling of the adjusting table base 6 through the test bench 5; In another embodiment, the inner ring 18 of the two-way compensation bearing 10 is directly interference-fitted on the test rotating shaft 15, and the second outer ring 16 of the two-way compensation bearing 10 is interference-fitted on the test bearing seat 4.

[0042] When the motion test tooling for a two-way compensation bearing provided by the present invention is in use, the to-be-tested two-way compensation bearing 10 is installed between the installation section of the test rotating shaft 15 and the test bearing housing. By simultaneously screwing in or out two push-pull arms 7, the displacement of the test bearing housing 4 in the axial direction of the test rotating shaft 15 can be adjusted. By screwing in two push arms 9, the test bearing housing 4 can be pushed to swing angularly along the axis of the test rotating shaft 15. Adjust the radial loading mechanism 2 to an appropriate pressure, and start the driving transmission mechanism to drive the test rotating shaft 15 to rotate, then the actual motion of the two-way compensation bearing 10 under various complex working conditions can be simulated.

[0043] The above are only the preferred embodiments of the present invention, and are not intended to limit the present invention. The patent protection scope of the present invention is subject to the claims. Any equivalent structural changes made by using the description and drawings of the present invention should be equally included in the protection scope of the present invention.

Claims

1. A bidirectional compensation bearing test fixture, characterized in that: The invention comprises a test bench and a driving shaft system installed on the test bench, wherein the driving shaft system comprises a test rotating shaft, wherein one end of the test rotating shaft comprises a mounting section for mounting a tested bearing thereon, a test bearing seat is also mounted on the test bench through an adjusting mechanism, the test bearing seat comprises a mounting cavity for mounting a second outer ring of the tested bearing, the adjusting mechanism comprises a group of telescopic push-pull structures, the group of telescopic push-pull structures comprises two push-pull arms and two push-up arms, one end of the push-pull arms facing the test bearing seat abuts against the test bearing seat, one end of the push-pull arms facing the test bearing seat is ball-jointed on the test bearing seat, the test bearing seat is an annular bearing seat, ball-joint hinge points of the two push-pull arms and the test bearing seat are on a first diameter of the end face of the test bearing seat, and the abutment points of the two push-pull arms and the test bearing seat are on a second diameter of the end face of the test bearing seat, and the first diameter and the second diameter are perpendicular.

2. A bidirectional compensation bearing test fixture according to claim 1, characterized in that: The adjusting mechanism also includes an adjusting pedestal, on which a threaded hole is arranged for the telescopic push-pull structure to be installed, and threaded sections cooperating with the threaded hole are arranged on the push-pull arm and the push-pull arm of the telescopic push-pull structure.

3. A bidirectional compensation bearing test fixture according to claim 2, characterized in that: The push-pull arm realizes a spherical joint with the test bearing seat through a joint bearing.

4. A bidirectional compensation bearing test fixture according to claim 3, characterized in that: The push-pull arm includes a push-pull screw rod, an optical axis section is provided at the end of the push-pull screw rod, the inner ring of the joint bearing is sleeved on the optical axis section, the outer ring of the joint bearing is installed with a joint bearing seat, and the joint bearing seat is fixedly installed on the test bearing seat; there is a deflection gap between the push-pull screw rod and the joint bearing seat.

5. A bidirectional compensation bearing test fixture according to claim 4, characterized in that: A positioning shoulder is provided at one end of the optical axis section, and an inner ring retaining ring is connected to the other end through a clamping screw. The inner ring retaining ring cooperates with the positioning shoulder to fix the inner ring of the joint bearing. The joint bearing seat includes a seat body and an outer ring retaining ring connected to the seat body through a clamping screw. The seat body is provided with an outer ring retaining ring mounting groove. The groove wall of the outer ring retaining ring mounting groove and the outer ring retaining ring cooperate to fix the outer ring of the joint bearing. The test bearing seat is provided with a mounting hole for the end of the push-pull arm to extend into, and the seat body is fixedly connected to the hole edge of the mounting hole through a flange at the end.

6. A bidirectional compensation bearing test fixture according to claim 1 or 2, characterized in that: The end of the push arm abutting against the test bearing seat is a ball head structure.

7. The bidirectional compensation bearing testing tool according to claim 1 is characterized in that: The test bench is also equipped with a radial loading mechanism, the loading direction of which extends along the first diameter or the second diameter.

8. A bidirectional compensation bearing testing tool as claimed in claim 7, characterized in that: The radial loading mechanism is located directly above the test bearing seat and loads vertically downward.

9. The bidirectional compensation bearing test fixture according to claim 2 is characterized in that: A bearing rib is provided on the mounting section of the test shaft at the end away from the adjusting mechanism, and a threaded hole is opened on the end face facing the adjusting mechanism. A retaining ring of the inner ring of the bearing to be tested is installed on the end face of the test shaft facing the adjusting mechanism through bolts to tighten the inner ring of the bearing to be tested. The adjustment base is annular, and the inner diameter of its annular hole is larger than the diameter of the mounting section of the test shaft.

Images