A testing device for a spherical rod end joint bearing

Abstract

The present invention provides a testing device for a spherical rod end joint bearing, which comprises: a test main body, the test main body includes a loading system, a swinging system, a rotating system, and a connecting plate, and the ROTATION end and the TIP end of the spherical rod end joint bearing are arranged in the connecting plate. The beneficial effects are as follows: The present invention adopts a "cross-shaped" structure to conduct fatigue life tests on the axial, radial loads, torques suffered by the continuously rotating fixed rod end during the test, and the torques suffered by the spherical rod end during the swinging process.

Description

Technical Field

[0001] The present invention relates to the field of bearing testing machines, and particularly to a testing device for a spherical rod end spherical plain bearing. Background Art

[0002] A testing machine for a spherical rod end spherical plain bearing is used to simulate the actual load spectrum and rotational speed spectrum conditions of a spherical rod end spherical plain bearing by a computer, conduct tests, and evaluate its various performances. It is a fatigue life test for the axial, radial loads, and torque received by the continuous rotation of the fixed rod end during the test, and the torque received by the spherical rod end during the swinging process.

[0003] Currently, the functions of the testing machines are single, and they cannot perform multi-faceted detection tests. Summary of the Invention

[0004] In order to solve the problems existing in the prior art, the present invention provides a testing device for a spherical rod end spherical plain bearing.

[0005] The technical solution of the present invention is realized as follows:

[0006] A testing device for a spherical rod end spherical plain bearing, comprising: a test main body, the test main body including a loading system, a swinging system, a rotating system, and a connecting disk. The ROTATION end and TIP end of the spherical rod end spherical plain bearing are arranged in the connecting disk.

[0007] The loading system consists of an axial loading mechanism and a radial loading mechanism. The axial loading mechanism and the radial loading mechanism are connected to the connecting disk. The axial loading mechanism is sequentially composed of an axial servo oil cylinder, a connecting head I, a supporting mechanism I, a linear guide rail, a cross universal joint, a connecting head II, and a force sensor. The supporting mechanism I is installed on the linear guide rail. The radial loading mechanism is sequentially composed of a radial servo oil cylinder, the connecting head I, a supporting mechanism II, the cross universal joint, the connecting head II, and the force sensor. Both of the two force sensors are connected to the connecting disk through a connecting head III.

[0008] The swinging system consists of a cam roller mechanism, a coupling shaft, a supporting shaft sleeve, the force sensor, a bearing seat, a chute, and a slider. The cam roller mechanism is connected to one end of the coupling shaft. The supporting shaft sleeve is further arranged outside the coupling shaft. The other end of the coupling shaft is connected to the bearing seat through the force sensor. A plurality of springs are further arranged between the bearing seat and the supporting shaft sleeve. A bearing is arranged in the bearing seat. A bearing outer sleeve is installed on the bearing. The output end of the bearing outer sleeve is connected to the chute. A slide rail is arranged in the chute. The slider is arranged on the slide rail. The other end of the chute is connected to the TIP end of the spherical rod end spherical plain bearing.

[0009] The rotation system is composed of the ROTATION end of the spherical rod end joint bearing, which is sequentially connected through the connecting disc, the cross universal joint, the torque sensor, the support mechanism, the link mechanism, and the motor. The link mechanism includes discs with different diameters.

[0010] The ROTATION end of the spherical rod end joint bearing bears the axial load and radial load applied by the loading system.

[0011] A water tank is also provided outside the ROTATION end of the spherical rod end joint bearing. A water supply mechanism is also provided in the rotation system, and the water supply mechanism is communicated with the inside of the connecting disc.

[0012] The beneficial effects of the present invention are as follows:

[0013] 1. The present invention adopts a "cross type" structure for the fatigue life test of the axial, radial loads, and torques suffered by the continuously rotating fixed end of the test rod and the torque suffered by the spherical rod end during the swinging process.

[0014] 2. An axial and radial loading system is used to load the end of the spherical rod end joint bearing. This loading system has a large power, high precision, and fast response speed.

[0015] 3. In the swinging system, a sliding rail that can slide is provided in the chute. During the swinging process of the TIP end of the spherical rod end joint bearing, there will be adjustments in position and angle. The bearing outer sleeve and the bearing are tightly fitted. As the bearing linearly displaces, the bearing outer sleeve will have an angle. The TIP end is rigidly connected to the bearing outer sleeve. During the process of angle change, the middle sliding rail will compensate for the magnitude of the displacement, so there will be no dead point during the swinging process.

[0016] 4. In the rotation system, a cycloidal pinwheel reducer is used, and it is connected to a 2.2KW three-phase asynchronous motor. The motor speed is 2840r / min, and the output speed after passing through the reducer is 258.r / min, which is 4.3 r per second. The ratio of the disc connected to the link mechanism and the equipment to the disc connected to the reducer is 1.15. Therefore, when the disc connected to the reducer rotates 4.3r, the equipment will swing 3.7r. So 3HZ can be achieved. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for the description of the embodiments or the prior art. Obviously, the following drawings are only some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can be obtained based on these drawings.

[0018] Figure 1 It is a schematic structural diagram of the present invention;

[0019] Figure 2 It is a schematic structural diagram of the loading system;

[0020] Figure 3 It is a schematic structural diagram of the swing system;

[0021] Figure 4 It is a schematic structural diagram of the rotating system;

[0022] Figure 5 It is a view in the A-A direction of the swing system. Specific embodiments

[0023] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0024] As Figures 1 to 5 shown, a spherical rod end joint bearing test device, which comprises: a test main body, the test main body includes a loading system 1, a swing system 2, a rotating system 3, a connecting disk 4, the ROTATION end 5 and the TIP end 6 of the spherical rod end joint bearing are located in the connecting disk 4.

[0025] The loading system 1 consists of an axial loading mechanism 7 and a radial loading mechanism 8. The axial loading mechanism 7 and the radial loading mechanism 8 are connected to the connecting disk 4. The ROTATION end 5 of the spherical rod end joint bearing bears the axial load and the radial load applied by the loading system 1. The axial loading mechanism 7 is composed of an axial servo oil cylinder 7-1, a connecting head 7-2, a supporting mechanism 7-3, a linear guide rail 7-4, a cross universal joint 7-5, a connecting head 7-6, and a force sensor 7-7 connected in sequence; the supporting mechanism 7-3 is installed on the linear guide rail 7-4. The radial loading mechanism 8 is composed of a radial servo oil cylinder 8-1, a connecting head 7-2, a supporting mechanism 8-2, a cross universal joint 7-5, a connecting head 7-6, and a force sensor 7-7 connected in sequence. Both force sensors 7-7 are connected to the connecting disk 4 through a connecting head 9. A movable degree of freedom is reserved between the above-mentioned connecting parts, so that the interference on the spherical rod end joint bearing is reduced to the minimum. The loading system 1 controls the output oil pressure of the servo valve by using the PID control principle;

[0026] The TIP end 6 of the spherical rod end joint bearing performs a swinging motion through the swinging system 2. The swinging system 2 consists of a cam roller mechanism 10, a coupling shaft 11, a support bushing 12, a force sensor 7-7, a bearing housing 13, a chute 14, and a slider 15. The cam roller mechanism 10 is connected to one end of the coupling shaft 11. A support bushing 12 is also provided outside the coupling shaft 11. The other end of the coupling shaft 11 is connected to the bearing housing 13 through the force sensor 7-7. A number of springs 16 are also provided between the bearing housing 13 and the support bushing 12. A bearing 17 is provided inside the bearing housing 13. A bearing outer sleeve 18 is installed on the bearing 17. The output end of the bearing outer sleeve 18 is connected to the chute 14. A slide rail is provided inside the chute 14, and a slider 15 is arranged on the slide rail. The other end of the chute 14 is connected to the TIP end 6 of the spherical rod end joint bearing. During the swinging process of the TIP end 6 of the spherical rod end joint bearing, there will be adjustments in position and angle. The bearing outer sleeve 18 and the bearing 17 are closely fitted. The bearing outer sleeve 18 will have an angle as the bearing 17 linearly displaces. The TIP end 6 is rigidly connected to the bearing outer sleeve 18. During the process of angle change, the middle slide rail will compensate for the magnitude of the displacement. Therefore, there will be no dead points during the swinging process.

[0027] The rotation system 3 is composed of the ROTATION end 5 of the spherical rod end joint bearing, which is sequentially connected through a connecting disk 4, a cross universal joint 7-5, a torque sensor 19, a support mechanism 20, a connecting rod mechanism 21, and a motor 22. The connecting rod mechanism 21 consists of a disk one 211 and a disk two 212 with different diameters. The diameters of the disk one 211 and the disk two 212 are 130 mm and 110 mm respectively. The disk one 211 is connected to the support mechanism 20, and the disk two 212 is connected to a reducer. The disk one 211 and the disk two 212 are connected by a connecting rod. When the disk two 212 rotates one circle, the disk one 211 will rotate by an angle accordingly, and the ROTATION end 5 will also change and rotate by an angle. A water tank 23 is also provided outside the ROTATION end 5 of the spherical rod end joint bearing. A water supply mechanism 24 is also provided in the rotation system 3. The water supply mechanism 24 is internally connected to the connecting disk 4. An infrared temperature measuring device 25 for temperature measurement is also provided inside the connecting disk 4. The water supply mechanism 24 is used to cool the connecting disk 4 and the spherical rod end joint bearing.

[0028] In the rotation system, a cycloid pinwheel reducer is adopted and it is connected to a 2.2KW three-phase asynchronous motor. The motor speed is 2840 r / min, and the output speed after passing through the reducer is 258 r / min, which is 4.3 r per second. The ratio of the disk connected to the connecting rod mechanism of the equipment to the disk connected to the reducer is 1.15. Therefore, when the disk connected to the reducer rotates 4.3 r, the equipment will swing 3.7 r. So 3HZ can be achieved.

[0029] This device uses an industrial control computer as the control system to conduct load tests, vibration measurements, rotational speed measurements, temperature monitoring, etc.

[0030] The above are only the preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention shall be included within the protection scope of the present invention.

Claims

1. A testing device for a spherical rod end joint bearing, which comprises: Test subject, characterized in that: the test subject includes a loading system, a swinging system, a rotating system, and a connecting disk, and the ROTATION end and the TIP end of a spherical rod end joint bearing are provided in the connecting disk; The loading system consists of an axial loading mechanism and a radial loading mechanism. The axial loading mechanism and the radial loading mechanism are connected to the connecting disk. The axial loading mechanism is sequentially composed of an axial servo cylinder, a first connecting head, a first support mechanism, a linear guide rail, a cross universal joint, a second connecting head, and a force sensor. The first support mechanism is installed on the linear guide rail. The radial loading mechanism is sequentially composed of a radial servo cylinder, the first connecting head, a second support mechanism, the cross universal joint, the second connecting head, and the force sensor. Both force sensors are connected to the connecting disk through a third connecting head; The swinging system consists of a cam roller mechanism, a coupling shaft, a support bushing, the force sensor, a bearing seat, a chute, and a slider. The cam roller mechanism is connected to one end of the coupling shaft. The support bushing is also provided outside the coupling shaft. The other end of the coupling shaft is connected to the bearing seat through the force sensor. A plurality of springs are also provided between the bearing seat and the support bushing. A bearing is also provided in the bearing seat. A bearing outer sleeve is installed on the bearing. The output end of the bearing outer sleeve is connected to the chute. A slide rail is provided in the chute. A slider is arranged on the slide rail. The other end of the chute is connected to the TIP end of the spherical rod end joint bearing; The rotating system is sequentially composed of the ROTATION end of the spherical rod end joint bearing through the connecting disk, the cross universal joint, a torque sensor, a support mechanism, a link mechanism, and a motor. The link mechanism includes disks with different diameters; 2. The spherical rod end joint bearing test device according to claim 1, characterized in that: The ROTATION end of the spherical rod end joint bearing bears the axial load and the radial load applied by the loading system. A water tank is also provided outside the ROTATION end of the spherical rod end joint bearing. A water supply mechanism is also provided in the rotating system. The water supply mechanism is communicated with the inside of the connecting disk.

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