Tool for testing service life of angular contact knuckle bearing

Abstract

The utility model discloses an angular contact knuckle bearing life test tool, which comprises a rack, a driving hydraulic rod and a test shaft, the test shaft is rotatably arranged on the rack, an angular contact knuckle bearing to be tested is sleeved on the test shaft, the driving hydraulic rod is arranged on the rack, a reinforcement arm is fixedly arranged on the side wall of the test shaft, and the reinforcement arm is fixedly arranged on the side wall of the test shaft. A cylinder body of the driving hydraulic rod is arranged on the rack, and the end of a pushing rod of the driving hydraulic rod is hinged to the lower end of the boosting arm so that the boosting arm can be driven to swing through stretching and retracting of the pushing rod. According to the angular contact knuckle bearing service life test tool, the torque of the swing test shaft can be effectively enhanced through the effect of the force increasing arm, so that the angular contact knuckle bearing can be tested.

Description

Technical Field

[0001] The utility model relates to a testing tool, more particularly to a testing tool for an angular contact spherical bearing life. Background Art

[0002] Spherical joint bearings are a type of spherical sliding bearing whose sliding contact surfaces are an inner sphere and an outer sphere; spherical joint bearings are generally used for swinging motion, and because the sliding surface is spherical, they can also perform self-aligning motion within a certain angle range; spherical joint bearings are widely used in industries such as engineering hydraulic cylinders, forging machines, and engineering machinery; existing spherical joint bearing test equipment can usually only detect the influence of a single variable on spherical joint bearings, such as load tests and swing tests on bearings, but spherical joint bearings have complex working conditions during use; in actual applications, spherical joint bearings may bear radial loads, axial loads, or combined loads in multiple directions; they may perform rotation, swing, self-aligning, or a combined motion of two degrees of freedom.

[0003] Therefore, in the current prior art, there is an invention patent with the announcement number CN111829781B, entitled A Joint Bearing Composite Motion Test Device, which discloses that a loading mechanism, a swing drive mechanism, and a self-aligning drive mechanism are provided to realize the swing motion of the test joint bearing around the central axis of the supporting core shaft, thereby realizing the test of the joint bearing. The invention patent discloses that the specific method of the swing drive mechanism and the self-aligning drive mechanism is to directly drive the core shaft to rotate by using a servo motor and a swing cylinder. However, the driving torque required in the process of angular contact joint bearings is relatively large. Therefore, the method of using a servo motor and a swing cylinder in the prior art is prone to the problem of being unable to drive the core shaft to rotate for testing. Utility Model Content

[0004] In view of the shortcomings of the existing technology, the purpose of the present invention is to provide an angular contact joint bearing life testing tool with a large driving torque, which can effectively drive the core shaft to rotate for testing.

[0005] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a tool for testing the life of an angular contact joint bearing, comprising a frame, a driving hydraulic rod, and a test shaft, wherein the test shaft is rotatably mounted on the frame, the angular contact joint bearing to be tested is sleeved on the test shaft, and the driving hydraulic rod is mounted on the frame, and is characterized in that a booster arm is fixedly mounted on the side wall of the test shaft, the cylinder body of the driving hydraulic rod is mounted on the frame, and the push rod end of the driving hydraulic rod is hinged to the lower end of the booster arm, so as to drive the booster arm to swing by extending and retracting the push rod.

[0006] As a further improvement of the utility model, the square jack is coaxially fixed on the booster arm, the square jack is inserted into the jack and is matched with the jack.

[0007] As a further improvement of the utility model, the load shaft is coaxially connected with the test shaft through the connecting shaft, the middle load body is coaxially sleeved on the load shaft, the two angle contact joint bearings to be tested are sleeved on the load shaft and are arranged close to the two ends of the middle load body, the two ends of the middle load body are coaxially fixed with the spacer rings, the two spacer rings are respectively abutted with the inner rings of the two angle contact joint bearings to be tested, the end load body is coaxially arranged on the end of the load shaft away from the connecting shaft, the end load body is coaxially arranged on the end of the angle contact joint bearing to be tested away from the middle load body, the radial load is applied on the side surface of the middle load body, and the axial load is applied on the end surface of the end load body.

[0008] As a further improvement of the utility model, the end surface of the end of the spacer ring away from the middle load body is coaxially provided with the abutting ring, the abutting ring is integrally arranged with the spacer ring, the abutting ring is in the shape of a circular truncated cone, the end with a large area of the circular truncated cone is integrally arranged with the spacer ring, and the end with a small area is abutted with the inner ring of the angle contact joint bearing to be tested.

[0009] As a further improvement of the utility model, the middle load body comprises a middle load ring and two test bearings, the two test bearings are arranged on the load shaft at intervals, the middle load ring is coaxially sleeved on the two test bearings, and the end surface of the spacer ring is coaxially fixed with the sealing ring, the sealing ring is abutted with the end surface of the outer ring of the test bearing, so that a sealed space is formed between the spacer ring, the test bearing and the middle load ring.

[0010] As a further improvement of the utility model, a plurality of annular steps are formed on the load shaft, the plurality of annular steps are arranged on the load shaft, the annular step close to the middle part of the load shaft has the largest diameter, the diameters of the remaining steps gradually decrease along the length direction of the load shaft, the annular steps are divided into two groups, the annular steps are symmetrically arranged with the annular step in the middle part as the symmetric axis, and are respectively used for mounting the test bearings, the spacer rings and the test bearings.

[0011] The utility model discloses the beneficial effect, through the setting of rack, drive hydraulic rod, test shaft, can effectively constitute a test angle contact joint bearing's frock, and through the setting of booster arm, can effectively realize the increase drive hydraulic rod and add the drive torque that test shaft applied, so compared with prior art's mode, will not appear the problem that the drive torque that joint bearing needed when testing is too big and leads to difficult to drive. ACCURACY

[0012] Figure 1 It is overall structural drawing of the angle contact joint bearing life test frock of the utility model.

[0013] Figure 2 This is a diagram of the internal structure of the angular contact spherical bearing life test tool of the present utility model. DETAILED DESCRIPTION

[0014] The present invention will be further described below with reference to the embodiments shown in the accompanying drawings.

[0015] Reference Figures 1 to 2 As shown, a tool for testing the life of an angular contact joint bearing in this embodiment includes a frame 1, a driving hydraulic rod 2, and a test shaft 3. The test shaft 3 is rotatably mounted on the frame 1, and the angular contact joint bearing to be tested is sleeved on the test shaft 3. The driving hydraulic rod 2 is mounted on the frame 1, and is characterized in that a force-enhancing arm 4 is fixedly mounted on the side wall of the test shaft 3, and the cylinder body of the driving hydraulic rod 2 is mounted on the frame 1. The push rod end of the driving hydraulic rod 2 is hinged to the lower end of the force-enhancing arm 4 to drive the force-enhancing arm 4 to swing by the extension and contraction of the push rod. In the process of using the test tool of this embodiment, it is only necessary to sleeve the angular contact joint bearing to be tested onto the test shaft 3 It can be done by putting it on, and then applying load to the joint bearing on the test shaft 3 through an external loading mechanism such as a hydraulic cylinder, and then driving the hydraulic rod 2 to swing the force-boosting arm 4, thereby driving the test shaft 3 to swing, thereby completing the test of the angular contact joint bearing, and because the telescopic power of driving the hydraulic rod 2 is first transmitted to the force-boosting arm 4, and then transmitted to the test shaft 3 to swing through the force-boosting arm 4, the leverage effect of the force-boosting arm 4 is utilized, so that the torque finally received by the test shaft 3 is much greater than that directly driven by the swinging hydraulic cylinder. Therefore, compared with the direct drive method used in the prior art, it can well avoid the problem of difficulty in testing due to insufficient torque.

[0016] As a specific embodiment of the improvement, a square socket 31 is provided on the test shaft 3, and a square shaft 41 is coaxially fixed on the force-boosting arm 4. The square shaft 41 is inserted into the socket 31 and adapted to the socket 31. By setting the square shaft 41 and the socket 31, the connection between the force-boosting arm 4 and the test shaft 3 can be effectively achieved, and the square shaft 41 slides in the socket 31 to simply and effectively absorb a certain vertical movement during the rotation of the test shaft 3. Compared with the method of hinged connection between the cylinder body of the driving hydraulic rod 2 and the frame 1, the driving hydraulic rod 2 can be more firmly installed on the frame 1. Figure 1 As shown, the driving hydraulic rod 2 of this embodiment is firmly mounted on the frame 1 by arranging four bolts at the front end of the cylinder body.

[0017] As a specific embodiment of the improvement, the end of the test shaft 3 away from the frame 1 is coaxially connected to the load shaft through a coupling 5, and a middle load body 6 is coaxially sleeved on the load shaft. Two angular contact joint bearings to be tested are sleeved on the load shaft and arranged near the two ends of the middle load body 6. Both ends of the middle load body 6 are coaxially fixed with spacers 7, and the two spacers 7 are respectively against the inner rings of the two angular contact joint bearings to be tested. The end of the load shaft facing away from the coupling 5 is coaxially provided with an end load body 8, and the end load body 8 is coaxially installed on the angular contact joint bearing to be tested. At the end of the joint bearing facing away from the middle load body 6, a radial load is applied to the side surface of the middle load body 6, and an axial load is applied to the end face of the end load body 8. Through the arrangement of the above structure, the applied radial load can be transferred to the inner ring of the angular contact joint bearing to be tested through the load shaft through the action of the middle load body 6, and converted into a load applied from the inner ring of the angular contact joint bearing to the outer ring. Through the arrangement of the end load body 8, the end load can be transferred to the inner ring of the angular contact joint bearing through the spacer ring 7, thereby realizing the load application to the angular contact joint bearing.

[0018] As a specific embodiment of the improvement, an abutment ring 71 is coaxially provided on the end face of the spacer 7 facing away from the middle load body 6. The abutment ring 71 is integrally arranged with the spacer 7. The abutment ring 71 is in the shape of a truncated cone. The end with a larger area of ​​the truncated cone is integrally arranged with the spacer 7, and the end with a smaller area abuts against the inner ring of the angular contact spherical bearing to be tested. Through the setting of the abutment ring 7, the end load can be effectively transferred, and the abutment ring 7 itself has sufficient structural strength.

[0019] As a specific embodiment of the improvement, the medium load body 6 includes a medium load ring 61 and two test bearings 62. The two test bearings 62 are installed on the load shaft at intervals. The medium load ring 61 is coaxially sleeved on the two test bearings 62. A sealing ring is coaxially fixed on the end face of the spacer 7. The sealing ring is abutted against the outer ring end face of the test bearing 62 to form a sealed space between the spacer 7, the test bearing 62 and the medium load ring 61. Through the arrangement of the above structure, a better test function can be achieved by injecting lubricating oil into this space, and the radial load on the medium load body 6 can be better transmitted.

[0020] As a specific embodiment of the improvement, a plurality of annular steps 9 are formed on the load shaft, and the plurality of annular steps 9 are arranged on the load shaft, wherein the annular step 9 close to the middle of the load shaft has the largest diameter, and the diameters of the remaining steps decrease successively along the length direction of the load shaft, and are divided into two groups, which are symmetrically arranged with the annular step 9 in the middle as the axis of symmetry, and are respectively used to install the test bearing 62, the spacer 7 and the bearing to be tested. By setting up a plurality of annular steps 9, an effective installation position can be effectively provided to the angular contact joint bearing to be tested, the spacer 7 and the test bearing 62, and the resistance effect of the annular steps 9 can be utilized to avoid axial sliding of the test bearing 62, the spacer 7 and the bearing to be tested on the load shaft when an axial load is applied.

[0021] In summary, the angular contact joint bearing life test fixture of this embodiment increases the torque applied to the test shaft 3 by the driving hydraulic rod 2 by providing the force-boosting arm 4, thereby effectively avoiding the problem of being unable to perform testing due to insufficient torque.

[0022] The above description is merely a preferred embodiment of the present invention. The scope of protection of the present invention is not limited to the above embodiment. All technical solutions based on the concept of the present invention are within the scope of protection of the present invention. It should be noted that for those skilled in the art, certain improvements and modifications that do not depart from the principles of the present invention should also be considered within the scope of protection of the present invention.

Claims

1. A tool for testing the life of an angular contact spherical bearing, comprising a frame (1), a driving hydraulic rod (2), and a test shaft (3), wherein the test shaft (3) is rotatably mounted on the frame (1), the angular contact spherical bearing to be tested is sleeved on the test shaft (3), and the driving hydraulic rod (2) is mounted on the frame (1), characterized in that: A booster arm (4) is fixedly mounted on the side wall of the test shaft (3); a cylinder body of the driving hydraulic rod (2) is mounted on the frame (1); and an end portion of a push rod of the driving hydraulic rod (2) is hinged to the lower end of the booster arm (4) so ​​as to drive the booster arm (4) to swing by extending and retracting the push rod.

2. The angular contact spherical bearing life test tool according to claim 1, characterized in that: A square socket (31) is provided on the test shaft (3), a square shaft (41) is coaxially fixed on the force-enhancing arm (4), and the square shaft (41) is inserted into the socket (31) and matched with the socket (31).

3. The angular contact spherical bearing life test tool according to claim 2, characterized in that: The end of the test shaft (3) away from the frame (1) is coaxially connected to the load shaft through a coupling (5), and a middle load body (6) is coaxially sleeved on the load shaft. Two angular contact joint bearings to be tested are sleeved on the load shaft and arranged near the two ends of the middle load body (6). Both ends of the middle load body (6) are coaxially fixed with spacers (7), and the two spacers (7) are respectively abutted against the inner rings of the two angular contact joint bearings to be tested. The end of the load shaft facing away from the coupling (5) is coaxially provided with an end load body (8), and the end load body (8) is coaxially installed on the end of the angular contact joint bearing to be tested facing away from the middle load body (6). The radial load is applied to the side of the middle load body (6), and the axial load is applied to the end face of the end load body (8).

4. The angular contact spherical bearing life test tool according to claim 3, characterized in that: An abutment ring (71) is coaxially provided on the end face of the spacer (7) facing away from the middle load body (6). The abutment ring (71) is integrally arranged with the spacer (7). The abutment ring (71) is in the shape of a truncated cone. The end with a larger area of ​​the truncated cone is integrally arranged with the spacer (7), and the end with a smaller area abuts against the inner ring of the angular contact spherical bearing to be tested.

5. The angular contact spherical bearing life test tool according to claim 4, characterized in that: The medium load body (6) includes a medium load ring (61) and two test bearings (62). The two test bearings (62) are installed on the load shaft at intervals. The medium load ring (61) is coaxially sleeved on the two test bearings (62). A sealing ring is coaxially fixed on the end face of the spacer (7). The sealing ring is abutted against the outer ring end face of the test bearing (62) to form a sealed space between the spacer (7), the test bearing (62) and the medium load ring (61).

6. The angular contact spherical bearing life test tool according to claim 5, characterized in that: A plurality of annular steps (9) are formed on the load shaft, and the annular steps (9) are arranged on the load shaft, wherein the annular step (9) close to the middle of the load shaft has the largest diameter, and the diameters of the remaining steps decrease in sequence along the length direction of the load shaft and are divided into two groups, which are symmetrically arranged with the middle annular step (9) as the symmetry axis, and are respectively used to install the accompanying test bearing (62), the spacer (7) and the bearing to be tested.

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