Bidirectional compensation bearing test tool

Abstract

The invention provides a bidirectional compensation bearing testing tool which comprises a driving shaft system installed on a testing table, the driving shaft system comprises a testing rotating shaft, an adjusting mechanism is further installed on the testing table, and a testing bearing seat is further installed on the testing table through the adjusting mechanism. A to-be-tested bearing is installed on a corresponding installation section on the test rotating shaft in a penetrating mode and is installed in the test bearing seat, and the axial position and the swing angle of the to-be-tested bearing can be changed through a telescopic push-pull structure on the adjusting mechanism. The motion test tool for the bidirectional compensation bearing provided by the invention can simulate various complex motion working conditions of the bidirectional compensation bearing, provides a test basis for judging whether the working performance of the bidirectional compensation bearing is qualified or not, and fills the blank of lack of a motion simulation tool for the bidirectional compensation bearing in the prior art.

Description

Technical Field

[0001] The invention relates to the field of bearing testing, and in particular to a bidirectional compensation bearing testing tool. Background Art

[0002] Double direction compensation bearing is a bearing with angular and axial compensation capability. Fig.10 As shown, the bidirectional compensating bearing 10 includes two outer rings and an inner ring longer than the outer ring, wherein the rolling elements 20 and the rolling element retainer 19 are arranged between the inner ring 18 and the first outer ring 17, and the second outer ring 16 is mounted 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 bidirectional compensating bearing is in use, the second outer ring 16 is clamped by the bearing seat and can drive the second outer ring 16 to deflect 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 retainer 19 and the rolling elements to move axially along the inner ring 18 within the moving range, and in the above two usage conditions, the inner ring 18 can rotate normally; therefore, due to the particularity of the structure, the bidirectional compensating bearing can work normally when it deflects by a certain angle or moves a certain distance along the axial direction.

[0003] However, the prior art lacks test fixtures that can simulate the operating conditions of bidirectional compensating bearings. Common bearing inspection and testing equipment is difficult to simulate the motion state of bidirectional compensating bearings. Therefore, it is impossible to determine whether the working performance of a bidirectional compensating bearing meets the standards through testing. Summary of the invention

[0004] The purpose of the present invention is to provide a bidirectional compensating bearing test tool to solve the problem that there is no test tool specifically used to simulate the operating conditions of the bidirectional compensating bearing in the prior art, and the working performance of the bidirectional compensating bearing cannot be accurately tested.

[0005] To achieve the above-mentioned objectives, the present invention provides a bidirectional compensating bearing testing tool, including a test bench and a driving shaft system installed on the test bench, the driving shaft system including a test shaft, one end of the test shaft having a mounting section for mounting a tested bearing thereon, a test bearing seat also being installed on the test bench through an adjusting mechanism, the test bearing seat having a mounting cavity for mounting a second outer ring of the tested bearing, the adjusting mechanism including a group of telescopic push-pull structures, the group of telescopic push-pull structures including two push-pull arms and two push-up arms, one end of the push-pull arm facing the test bearing seat abuts against the test bearing seat, one end of the push-pull arm facing the test bearing seat is ball-jointed on 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 a first diameter of the end face of the test bearing seat, 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.

[0006] Furthermore, the adjustment mechanism also includes an adjustment base, on which a threaded hole is provided for the telescopic push-pull structure to be installed, and the push-pull arm and the push-pull arm of the telescopic push-pull structure are provided with threaded sections that cooperate with the threaded hole.

[0007] Furthermore, the push-pull arm realizes a ball joint with the test bearing seat through a joint bearing.

[0008] Furthermore, the push-pull arm includes a push-pull screw rod, the end of which is provided with an optical axis section, the inner ring of the joint bearing is sleeved on the optical axis section, the outer ring of the joint bearing is equipped 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.

[0009] Furthermore, 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.

[0010] Furthermore, the end of the push arm abutting against the test bearing seat is a ball head structure.

[0011] Furthermore, a radial loading mechanism is 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 located directly above the test bearing seat and loads vertically downward.

[0013] Furthermore, a bearing rib is provided on the mounting section of the test shaft at an 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.

[0014] Beneficial effects: The present invention provides a pioneering bidirectional compensating bearing test fixture, including a radial drive shaft system installed on a test bench, the drive shaft system including a test shaft, an adjustment mechanism installed on the test bench, and a test bearing seat installed on the test bench through the adjustment mechanism. The bearing to be tested is installed on the corresponding installation section on the test shaft and installed in the test bearing seat. The axial position and swing angle of the bearing to be tested can be changed by the telescopic push-pull structure on the adjustment mechanism; the grouped telescopic push-pull structure includes two push-pull arms with ball joints on the test bearing seat and two push-pull arms abutting against the end face of the test bearing seat, and the two push-pull arms are ball-jointed with the test bearing seat. The hinge point is on the first diameter of the end face of the test bearing seat, and the contact 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 to each other. The push-pull arms are moved in the same direction at the same time to drive the axial displacement of the test bearing seat, and the angular deflection of the test bearing seat is changed by adjusting the telescopic length of the push arms. The motion test tooling of a bidirectional compensating bearing provided by the present invention can simulate various complex motion conditions of a bidirectional compensating bearing, provide a test basis for determining whether the working performance of the bidirectional compensating bearing is qualified, and fill the gap in the prior art of lacking motion simulation tooling for bidirectional compensating bearings. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a cross-sectional schematic diagram of the overall assembly structure of a bidirectional compensation bearing test fixture; Figure 2 It is a cross-sectional schematic diagram of the assembly structure of an adjustment mechanism of a bidirectional compensation bearing test fixture; Figure 3 It is a schematic diagram of the assembly structure of the adjustment mechanism and the drive transmission mechanism of a bidirectional compensation bearing test fixture; Figure 4 It is a schematic diagram of the axial compensation principle of a bidirectional compensation bearing test fixture; Figure 5 It is a schematic diagram of the angular compensation principle of a bidirectional compensation bearing test fixture; Figure 6 It is a schematic diagram of the structure of the push-pull arm; Figure 7 It is a schematic diagram of the structure of the push arm; Figure 8 It is a schematic diagram of the cross-sectional structure of the test bearing seat; Fig. 9 This is the front view of the test bearing seat; Fig.10 This is a schematic diagram of the assembly structure of the bidirectional compensation bearing to be tested.

[0016] In the figure: 1. adjustment mechanism; 2. radial loading mechanism; 3. drive shaft system; 31. test shaft mounting seat; 32. rotating bearing; 4. test bearing seat; 5. test bench; 6. adjustment seat; 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. push arm; 10. bidirectional compensation bearing; 11. spherical bearing seat; 111. seat body; 12. inner ring retaining ring of spherical bearing; 13. spherical bearing; 14. outer ring retaining ring of spherical bearing; 15. test shaft; 16. second outer ring; 17. first outer ring; 18. inner ring; 19. rolling element retainer; 20. rolling element. DETAILED DESCRIPTION

[0017] The features and performance of the present invention are further described in detail below in conjunction with the embodiments.

[0018] The principle and concept of the present invention is to design a test fixture, which can drive the bidirectional compensating bearing to be tested to produce axial displacement and angular swing, and integrate the adjustment mechanism, radial loading mechanism, driving transmission mechanism and driving shaft system on the same test bench; the bidirectional compensating bearing to be tested is installed on the test shaft, and the test shaft is driven to rotate by the driving transmission mechanism; the adjustment mechanism is connected to the bearing seat of the bidirectional compensating bearing to be tested, and adjusts the displacement and rotation of the bearing seat; a radial load is provided to the bearing seat through the radial loading mechanism; the bearing seat is adjusted to the displacement distance of the rotation angle required for the test through the adjustment mechanism, the bearing seat is radially loaded, and the driving transmission mechanism is turned on to drive the test shaft to rotate, which can better simulate the actual motion condition of the bidirectional compensating bearing.

[0019] Based on the above principles and concepts, the present invention provides a bidirectional compensation bearing test fixture and multiple embodiments thereof for further explanation.

[0020] Based on the above principles, in a basic embodiment, as Figure 1 According to the provided embodiment, a bidirectional compensating bearing testing tool provided by the present invention includes a test bench 5 and a drive shaft system 3 installed on the test bench 5, the drive shaft system 3 includes a test shaft 15, the drive shaft system 3 includes a test shaft mounting seat 31 installed on the test bench 5 and on the right side of the adjusting mechanism 1, the test shaft 15 is also provided with a rotating bearing 32, the test shaft 15 has a mounting section for the tested bearing to be mounted thereon, the drive shaft system 3 is also connected to a driving transmission structure to drive the test shaft 15 to rotate, the test bench 5 is also connected to a test bearing seat 4 through the adjusting mechanism 1, the test bearing seat 4 has a mounting cavity for installing the second outer ring 16 of the tested bidirectional compensating bearing 10, and the adjusting mechanism 1 includes a group of telescopic push-pull structures arranged along the axial direction of the test shaft 15.

[0021] The grouped telescopic push-pull structure includes two push-pull arms 7 and two 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 push arms 9 push different lengths respectively to drive the test bearing seat 4 to swing angularly. The push arms 9 cooperate with the push-pull arms 7 to achieve swing at more angles.

[0022] A bidirectional compensating bearing testing tool provided by the present invention can simulate various complex motion conditions of the bidirectional compensating bearing. The axial movement and angular swing of the bidirectional compensating bearing 10 can be realized through the cooperation of the push-pull arm 7 and the push arm 9, thereby providing accurate test data for determining whether the working performance of the bidirectional compensating bearing is qualified, thereby improving the accuracy of the bidirectional compensating bearing test.

[0023] Based on the above embodiments, in one embodiment, Figure 2-10 In the provided embodiment, the test bearing seat 4 is an annular bearing seat, and the telescopic push-pull structure arranged in groups includes two push-pull arms 7 and two push arms 9, wherein 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 abutment points of the two push arms 9 and the test bearing seat 4 are on the second diameter of the annular test bearing seat 4, and the above-mentioned two hinge points and two abutment points are evenly arranged in annular direction on the end face of the test bearing seat 4, and the first diameter is perpendicular to the second diameter.

[0024] Based on the above embodiments, in one embodiment, Figure 2-10 In the provided embodiment, the adjustment mechanism 1 also includes an adjustment base 6, on which a threaded hole is provided for the telescopic push-pull structure to be installed on the adjustment base 6, and the push-pull arm 7 and the push-pull arm 9 of the telescopic push-pull structure are provided with threaded shaft sections that cooperate with the threaded holes, and the push-pull arm 7 and the push-pull arm 9 are screwed in or out along the axial direction of the test shaft 15 on the adjustment base 6, and drive the test bearing seat 4 and the test bearing seat 4 fixed to move axially along the test shaft 15 or swing angularly on the axis of the test shaft 15; in another embodiment, a through hole is provided on the adjustment base 6, and the push-pull arm 7 and the push-pull arm 9 are optical axes, and the ends of the push-pull arm 7 and the push-pull arm 9 away from the test bearing seat 4 are connected to an electric push rod, and the push-pull arm 7 and the push-pull arm 9 are pushed or pulled by the electric push rod to move along the axial direction of the test shaft 15.

[0025] Based on the above embodiments, in one embodiment, Figure 2-10 In the provided embodiment, an optical axis section for mounting a joint bearing 13 is provided on the push-pull arm 7, and the joint bearing 13 is mounted on the optical axis section. The push-pull arm 7 realizes a ball joint with the test bearing seat 4 through the joint 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 ball joint.

[0026] Based on the above embodiments, in one embodiment, Figure 2-10 In the provided embodiment, the push-pull arm 7 includes a push-pull screw 71, an optical axis section is provided at the end of the push-pull screw 71, and a joint bearing 13 is also mounted on the optical axis section of the push-pull screw 71. The outer ring of the joint bearing 13 is installed on the joint bearing seat 11, and the joint bearing seat 11 is fixed to the test bearing seat 4 by bolts, and there is a deflection gap between the push-pull screw 71 and the joint bearing seat 11, and the angular swing of the push-pull screw 71 is realized by the deflection gap and the joint bearing seat 11.

[0027] Based on the above embodiments, in one embodiment, Figure 2-10 In the embodiment provided, one end of the optical axis section is provided with a positioning shoulder, and the other end is fixed with a spherical bearing inner ring retaining ring 12 by a clamping screw, the spherical bearing inner ring retaining ring 12 cooperates with the positioning shoulder to fix the spherical bearing inner ring, the spherical bearing seat 11 includes a seat body 111 and a spherical bearing outer ring retaining ring 14 connected to the seat body 111 by a clamping screw, the seat body 111 is provided with a spherical bearing outer ring retaining ring mounting groove, the groove wall of the spherical bearing outer ring retaining ring mounting groove and the spherical bearing outer ring retaining ring 14 cooperate to fix the spherical bearing outer ring, the test The bearing seat 4 is also provided with a mounting hole for the push-pull arm 7 to extend into, and the seat body 111 is fixedly connected to the edge of the mounting hole through an end flange; in another embodiment, the seat body 111 is assembled in the mounting 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 spherical bearing is interference fit with the seat body 111, and the outer ring retaining ring 14 of the spherical bearing is fixed to the seat body 111 by the extrusion force of the interference fit.

[0028] On the basis of the above embodiment, in one embodiment, the pushing end of the push arm 9 used to push the test bearing seat 4 to swing angularly is a flat head structure. In a more preferred embodiment, as Figure 5 , Figure 7 In the provided embodiment, the end of the push arm 9 that abuts against the test bearing seat 4 is a ball head structure, which can avoid wearing the end surface of the test bearing seat 4.

[0029] Based on the above embodiments, in one embodiment, Figure 2-10 In the embodiment provided, 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 to be in the same direction as the first diameter or the second diameter, and the test bench 5 cooperates to provide a radial load to the test bearing seat 4, so as to prevent the loading from being unstable due to the deviation between the loading direction and the setting direction of the test bearing seat 4, thereby damaging the test bearing seat 4; in another embodiment, the height of the test bench is compared to Figure 3The test bench 5 is lowered, and the mounting seat of the test bench for installing the radial loading mechanism can be rotated around the axis of the test shaft 15 and fixed at any angle. The height of the test bench can meet the requirement of the radial loading mechanism 2 to radially pressurize the test bearing seat 4 within a range of 180° above the axis of the test shaft 15. When the radial loading mechanism 2 is in a non-vertical loading condition, it is necessary to install an additional supporting structure on the test bench to fix the test bearing seat 4, and the radial loading mechanism 2 is rotated to ensure that the loading direction of the radial loading mechanism 2 is in the same direction as the first diameter or the second diameter.

[0030] Based on the above embodiments, in one embodiment, Figure 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 for easy loading. In another embodiment, the telescopic rod of the radial loading mechanism 2 is horizontally arranged, perpendicular to the axis of the test shaft 15 and facing the test bearing seat 4, to provide radial load to the test bearing seat 4 in the horizontal direction.

[0031] Based on the above embodiments, in one embodiment, Figure 2-10 In the provided embodiment, a bearing rib is provided on the end of the mounting section of the test shaft 15 away from the adjustment mechanism 1, a threaded hole is opened on the end surface of the test shaft 15 facing the adjustment mechanism 1, and an inner ring rib of the bearing to be tested is installed by bolts, and the inner ring of the two-way compensation bearing to be tested is pressed by the rib in cooperation with the inner ring rib of the bearing to be tested, wherein the adjustment seat 6 is annular, and its aperture is larger than the shaft diameter of the mounting end of the test shaft 15, so that the test shaft 15 passes through the adjustment seat 6 and is installed in the test shaft mounting seat 31, and at the same time, it is convenient to install the inner ring rib 81 of the bearing to be tested and the outer ring rib 8 of the bearing to be tested on the test shaft 15; Figure 3 As shown, a mounting groove is opened around the annular adjustment base 6, and the mounting groove is installed in cooperation with the corresponding annular mounting opening on the test bench 5. In another embodiment, in order to avoid accidental circumferential rolling of the adjustment base 6 and cause damage to the entire test tooling, the adjustment base 6 can be set as a square structure with a circular hole, and a mounting groove is opened around the square adjustment base 6. A square mounting opening corresponding to the square adjustment base 6 is set on the test bench 5, and the circumferential rolling of the adjustment base 6 is limited by the test bench 5; in another embodiment, the inner ring 18 of the bidirectional compensation bearing 10 is directly interference fitted on the test shaft 15, and the second outer ring 16 of the bidirectional compensation bearing 10 is interference fitted on the test bearing seat 4.

[0032] When in use, a motion test tool for a bidirectional compensating bearing provided by the present invention installs the bidirectional compensating bearing 10 to be tested between the mounting section of the test shaft 15 and the test bearing seat, and the displacement of the test bearing seat 4 in the axial direction of the test shaft 15 can be adjusted by simultaneously screwing in or out the two push-pull arms 7. The test bearing seat 4 can be pushed to perform angular swing on the axis of the test shaft 15 by screwing in the two push arms 9. The radial loading mechanism 2 is adjusted to a suitable pressure, and the drive transmission mechanism is turned on to drive the test shaft 15 to rotate, thereby simulating the actual movement of the bidirectional compensating bearing 10 under various complex working conditions.

[0033] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. The patent protection scope of the present invention shall be based on the claims. All equivalent structural changes made using the contents of the description and drawings of the present invention should also be 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