CN103323241B - Composite swing type joint bearing service life testing machine - Google Patents
Composite swing type joint bearing service life testing machine Download PDFInfo
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- CN103323241B CN103323241B CN201310191988.XA CN201310191988A CN103323241B CN 103323241 B CN103323241 B CN 103323241B CN 201310191988 A CN201310191988 A CN 201310191988A CN 103323241 B CN103323241 B CN 103323241B
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Abstract
The invention discloses a composite swing type joint bearing service life testing machine. The composite swing type joint bearing service life testing machine comprises axial transmission shafts which are in coaxial transmission connection with inner rings of joint bearings, bearing clamps for clamping outer rings of the joint bearings and radial transmission shafts which are in transmission connection with the bearing clamps. The axes of the radial transmission shafts and the axes of the axial transmission shafts are vertically intersected, and the axial transmission shafts and the radial transmission shafts are all in transmission connection with corresponding driving devices for driving the corresponding transmission shafts to rotate and swing in a reciprocating mode. The at least two axial transmission shafts and/or the at least two radial transmission shafts are respectively parallelly arranged. The radial transmission shafts and the axial transmission shafts are crossed to form a testing machine rack for simultaneously testing at least two joint bearings. The testing machine rack is provided with at least two crossed positions which are formed by correspondingly intersecting the axes of the radial transmission shafts and the axes of the axial transmission shafts, and a bearing clamp is correspondingly arranged at each crossed position. The composite swing type joint bearing service life testing machine can simultaneously test at least two joint bearings, and the service life testing efficiency of the joint bearings is improved.
Description
Technical field
The present invention relates to a kind of joint bearing life testing machine.
Background technology
Oscillating bearing is a kind of sphere sliding friction pendulum bearing, and it comprises the inner ring with spherical outside surface and the outer ring with Internal Spherical Surface, and the life-span of oscillating bearing and reliability thereof are the most important usabilities of oscillating bearing.Most of joint bearing life testing machine can only carry out a set of bearing test, waste time and energy and the poor reliability of test findings, and once can carry out the durability test of many cover bearings, test period can be shortened widely, reduce experimentation cost, thus accelerate the construction cycle of product and improve paces, the testing machine that therefore once can carry out many cover bearing durability tests is subject to increasing concern, investigation and application.
At present both at home and abroad about the testing machine of oscillating bearing durability test has a lot, and accurate measurement can be reached.But these testing machines can only be used for doing the heavy load of oscillating bearing, the test of low wobble frequency, once can not realize the compound oscillating test of many cover bearings simultaneously.Especially for radial oscillating bearing, the compound oscillating of oscillating bearing can be realized and variable load loads, and once can measure and overlap bearing more, the joint bearing life testing machine that reinforcing life tests can be realized again and not yet solve so far.
Be disclose a kind of composite oscillating joint bearing test machine in the Chinese utility model patent instructions of CN201749030U at Authorization Notice No., it comprises the axial drive shaft for being in transmission connection with oscillating bearing inner ring to be measured, axial drive shaft drives its reciprocating rotary to swing by the first driving mechanism, testing machine also comprises the bearing fixture for clamping bearing outer ring to be measured, bearing fixture is connected with radial transmission shaft along the radial direction of bearing outer ring, the intersect vertical axis of radial transmission shaft and axial drive shaft, radial transmission shaft upper driving is connected with the second driving mechanism driving it to do reciprocating rotary swing.During use, the inner ring of oscillating bearing to be measured is fixedly installed in axial drive shaft, and with the outer ring of bearing clamp oscillating bearing to be measured, swung to transmission shaft and radial transmission shaft reciprocating rotary by the first driving mechanism and the second driving mechanism difference respective drive, can realize testing the friction and wear behavior of oscillating bearing under compound oscillating condition.But above-mentioned testing machine once can only carry out the test of a set of bearing, can not carry out compound oscillating test to many cover oscillating bearings, bulk testing efficiency is low simultaneously.
Summary of the invention
The object of this invention is to provide a kind of compound swinging type joint bearing life testing machine, once can only test to a set of bearing the technical matters causing test efficiency low to solve composite oscillating joint bearing test machine of the prior art.
For achieving the above object, the technical scheme of compound swinging type joint bearing life testing machine provided by the present invention is: compound swinging type joint bearing life testing machine, comprise the axial drive shaft for being connected with oscillating bearing inner ring coaxial transmission to be measured, for clamping the bearing fixture of oscillating bearing outer ring to be measured and the radial transmission shaft for being in transmission connection with bearing fixture, the axis of radial transmission shaft all with the intersect vertical axis of axial drive shaft, axial drive shaft and radial transmission shaft are all connected with the corresponding drive unit for driving corresponding transmission shaft reciprocating rotary to swing, described axial drive shaft and/or described radial transmission shaft are parallel is respectively furnished with at least two, all radial transmission shafts and axial drive shaft intersect to form the test rack for testing at least two cover oscillating bearings simultaneously, test rack at least has and intersects by the axis correspondence of radial transmission shaft and axial drive shaft two crossover locations formed, the equal correspondence in each crossover location place is furnished with the bearing fixture described in.
Each described bearing fixture is all equipped with loading fixture relative to the both sides of oscillating bearing to be measured, load and fixture is connected with for the hydraulic loading mechanism to oscillating bearing imposed load to be measured, hydraulic loading mechanism comprises hydraulic loaded cylinder and tension-compression sensor, and the piston rod in one end of tension-compression sensor and hydraulic loaded cylinder is connected, the other end and loading fixture are connected.Described testing machine also comprises for the displacement transducer corresponding with each oscillating bearing to be measured, and displacement transducer has for the measuring head with loading fixture top press contacts.
Described axial drive shaft and radial transmission shaft are parallel is respectively furnished with two, what formed by two axial drive shaft and two radial transmission shafts can be square to the test rack that four cover oscillating bearings are tested simultaneously, the crossover location that described test rack has is furnished with four, bearing fixture correspondence is furnished with four, and each radial transmission shaft all with at the two bearings fixture be furnished with by this radial transmission shaft and corresponding crossing two crossover locations formed of two axial drive shaft is in transmission connection.
Described drive unit comprises for driving the first driving mechanism of two axial drive shaft synchronous axial system and for driving the second driving mechanism of two radial transmission shaft synchronous axial system.
Described first, at least one driving mechanism in two driving mechanisms comprises the synchronous interaction mechanism for driving two parallel transmission shaft synchronous axial system, synchronous interaction mechanism comprises parallel two forks extended, two forks respectively correspondence are connected on two transmission shafts, and extend along the radial direction of transmission shaft, kinematic link is provided with between two forks, the two ends of kinematic link are hinged on two forks respectively, two forks, two transmission shafts of kinematic link and correspondence form parallelogram linkage, driving mechanism also comprises the actuating unit swung to drive this fork with one of them the swing link transmission connecting rod in described synchronous interaction mechanism.
Described actuating unit comprises drive motor, the power output shaft of drive motor is coaxially installed with rotating disc, on rotating disc, bias is installed with eccentric connecting pin, the fork be in transmission connection with actuating unit in described two forks is that power inputs fork, power input fork on slidable fit have slide block, slide block and described eccentric connecting pin hinged.
Described drive motor is connected with frequency-variable controller.
Usefulness of the present invention is: when compound swinging type joint bearing life testing machine provided by the present invention uses, oscillating bearing to be measured correspondence is arranged in and intersects by the axis of axial drive shaft and two radial drive shaft axis correspondences the crossover location formed, the inner ring being positioned at the oscillating bearing at crossover location place is connected with axial drive shaft coaxial transmission, the outer ring of bearing clamp oscillating bearing to be measured, and radial transmission shaft and bearing fixture are in transmission connection, like this, when drive unit driving axial transmission shaft and radial transmission shaft do reciprocating rotary swing, just can carry out durability test when making joint shaft make compound oscillating to oscillating bearing.Because what test rack had is at least furnished with two by the axis of radial transmission shaft and the crossing crossover location formed of axis correspondence of axial drive shaft, so can test at least two oscillating bearings simultaneously, so not only can improve the durability test efficiency to oscillating bearing, and contrast test can be made to many covers to be tested joint shaft.And joint shaft can be made in process of the test to make compound oscillating also closer to the actual condition of oscillating bearing, effectively can improve test accuracy.
Accompanying drawing explanation
Fig. 1 is the structural representation of a kind of embodiment of compound swinging type joint bearing life testing machine provided by the present invention;
Fig. 2 is the structural representation of hydraulic loading mechanism in testing machine shown in Fig. 1;
Fig. 3 is the structural representation of synchronous interaction mechanism in testing machine shown in Fig. 2.
Embodiment
As shown in Figure 1 to Figure 3, the embodiment of compound swinging type joint bearing life testing machine, testing machine in this embodiment comprises parallel first axial drive shaft 1 and the second axial drive shaft 20 of arranging, two axial drive shaft are used for being connected with the inner ring coaxial transmission of oscillating bearing to be measured, and each axial drive shaft is all rotated and is assemblied in two bearing seats.The two ends of each axial drive shaft are herein provided with two ring flanges respectively by key syndeton, the card of ring flange 7 is equipped with bearing pin dish 8 by end face location correspondence, and by bolt, ring flange 7 and bearing pin dish 8 are connected, the side away from ring flange 7 of bearing pin dish 8 is convexly equipped with the bearing pin for assemble oscillating bearing 10 coaxially arranged with axial drive shaft, when oscillating bearing 10 is arranged on after on bearing pin, available sleeve 11 is held out against, then with nut lock by sleeve fixing and locking.
Above-mentioned two axial drive shaft drive synchronous axial system by the first driving mechanism, first driving mechanism comprises the synchronous interaction mechanism for driving two parallel axial drive shaft synchronous axial system, synchronous interaction mechanism comprises parallel two forks extended, two forks are respectively long fork 16 and short fork 2, one end of two forks respectively correspondence is connected in two axial drive shaft, and extend along the radial direction of two axial drive shaft, kinematic link 18 is provided with between two forks, the two ends of kinematic link 18 are hinged on two forks respectively, the portion that is connected that two forks are connected with corresponding axial drive shaft is equal with the distance of the articulated section hinged with kinematic link.First driving mechanism also comprises the first actuating unit be connected with long swing link transmission, actuating unit comprises the first drive motor 14, the power output shaft of the first drive motor 14 is coaxially installed with rotating disc 15, on rotating disc 15, bias is installed with eccentric connecting pin 17, long fork is provided with the chute extended along fork bearing of trend, move back and forth in chute and be equipped with slide block, the eccentric connecting pin 17 on slide block and rotating disc 5 is hinged.The first drive motor 14 herein is also connected with frequency-variable controller.
Testing machine also comprises two parallel the first radial transmission shaft 5 and the second radial transmission shafts 26 arranged, each radial transmission shaft rotates equally and is assemblied in two bearing seats, two radial transmission shafts and two axial drive shaft are arranged vertically, the axis of two radial transmission shafts and the intersect vertical axis of two axial drive shaft herein, like this, two axial drive shaft and two radial transmission shafts are formed and are used for simultaneously to the square test rack that four cover oscillating bearings are tested, test rack has and intersects by the axis correspondence of the axis of two radial transmission shafts and two axial drive shaft four crossover locations formed, the equal correspondence in each crossover location place is furnished with one for clamping the bearing fixture 3 of oscillating bearing outer ring to be measured, the bearing fixture 3 that each radial transmission shaft is furnished with corresponding crossover location place respectively in bearing fixture 3 radial direction is in transmission connection.
Above-mentioned two radial transmission shafts drive synchronous axial system by the second driving mechanism, second driving mechanism comprises the synchronous interaction mechanism for driving two parallel radial transmission shaft synchronous axial system, synchronous interaction mechanism comprises parallel two forks extended, two forks are respectively long fork 24 and short fork 6, one end of two forks respectively correspondence is connected on two radial transmission shafts, and extend along the radial direction of two radial transmission shafts, kinematic link 25 is provided with between two forks, the two ends of kinematic link 25 are hinged on two forks respectively, equal with the distance of the portion that is connected that corresponding radial transmission shaft is connected and the articulated section hinged with kinematic link on two forks.Second driving mechanism also comprises the actuating unit be connected with long swing link transmission, actuating unit comprises the second drive motor 22, the power output shaft of the second drive motor 22 is coaxially installed with rotating disc 23, on rotating disc 23, bias is installed with eccentric connecting pin, long fork 24 is provided with the chute extended along fork bearing of trend, move back and forth in chute and be equipped with slide block, the eccentric connecting pin on slide block and rotating disc is hinged.The second drive motor is herein connected with frequency-variable controller equally.
Above-mentioned bearing fixture 3 is made up of left fixture 27, middle fixture 28 and right fixture 29, middle fixture 28 is combined by two clamping chunks, the medial surface medium position of each clamping chunk is equipped with a half slot, by the half slot of two clamping chunks oscillating bearing 10 to be measured is clamped in the center of middle fixture 28, left fixture 27, middle fixture 28 and right fixture 29 are by together with four bolt-connections.Corresponding, radial transmission shaft is in transmission connection by the extension bar that the left fixture of expansion sleeve and bearing fixture or right fixture extend.
The outside of above-mentioned bearing fixture is also furnished with loading fixture 21, loading fixture 21 comprises the left charging assembly be arranged on the left of left fixture 27 and the right charging assembly be arranged on the right side of right fixture 29, and left charging assembly and right charging assembly carry out spacing by the set nut being arranged in outside to it.Left charging assembly is herein identical with the structure of right charging assembly, include loading blocks 30 and lower loading blocks 31, upper and lower loading blocks medial surface respectively offers half slot, upper and lower loading blocks, by half slot and rolling bearing assembling, to be fixed together by bolt thus rolling bearing is clamped by upper and lower loading blocks.Loading fixture is herein connected with for the hydraulic loading mechanism 13 to oscillating bearing imposed load to be measured, this hydraulic loading mechanism 13 comprises hydraulic loaded cylinder 33 and tension-compression sensor 32, and the piston rod in one end of tension-compression sensor 32 and hydraulic loaded cylinder 33 is connected, the other end and lower loading blocks are connected.
Each oscillating bearing to be measured is all furnished with independent displacement transducer 12 and temperature sensor 9.Displacement transducer 12 has the measuring head for the upper surface top press contacts with loading fixture, for measuring the radial line displacement of oscillating bearing outer ring relative to inner ring.For temperature sensor 9, during use, measured hole is offered in the outer ring of oscillating bearing to be measured, the measuring head of temperature sensor 9 is placed in the measured hole of the outer ring of oscillating bearing.
The signal output part of above-mentioned tension-compression sensor 32, displacement transducer 12 and temperature sensor 9 is all connected on a display.
When the life test machine that the present embodiment provides uses, first oscillating bearing 10 to be measured is arranged on the bearing pin of bearing pin dish 8, oscillating bearing outer face is held out against with sleeve, and with nut by sleeve fixing and locking, now, the inner ring of oscillating bearing 10 is connected with the second axial drive shaft 20 coaxial transmission, then by left fixture, middle fixture, the outer ring of oscillating bearing 10 clamps by the bearing fixture 3 that right fixture is formed, and bearing fixture and the first radial transmission shaft 5 are in transmission connection, then outside bearing fixture 3, loading fixture is installed additional, and by bolt, the tension-compression sensor 32 loaded in fixture and hydraulic loading mechanism is coupled together, the installation of its excess-three oscillating bearing to be measured is the same with oscillating bearing 10 to be measured with load mode, each oscillating bearing to be measured is installed temperature sensor, displacement transducer, after installing, pre-set the pressure of hydraulic loaded cylinder, by the frequency needed for frequency-variable controller setting drive motor, after displacement transducer is returned to zero, two drive motor can be started.
First drive motor 14 driven rotary dish 15 rotates, rotating disc 15 is moved back and forth in the chute of long fork 16 by eccentric fixing eccentric connecting pin band movable slider on the rotating pan, thus drive the second axial drive shaft 20 to do reciprocally swinging together, long fork 16 drives short fork 2 to do reciprocally swinging together with the first axial drive shaft 1 by kinematic link 18, now, the bearing pin dish reciprocally swinging that first axial drive shaft 1 and the second axial drive shaft 20 drive respective two ends to be provided with, thus drive the inner ring of four oscillating bearings to be measured and the relative rotary oscillation in a left side, outer ring, thus the torsion swing test realized four oscillating bearings to be measured.
Second drive motor 22 driven rotary dish 23 rotates, rotating disc 23 is slided in the chute of long fork 24 by the eccentric eccentric connecting pin band movable slider be fixed on rotating disc 23, thus drive long fork 24 to do reciprocally swinging together with the second radial transmission shaft 26, long fork 24 drives short fork 6 to do reciprocally swinging together with the first radial transmission shaft 5 by kinematic link 25, now, two radial transmission shafts drive the bearing fixture at respective two ends to do reciprocally swinging together, bearing fixture drives the outer ring of the oscillating bearing of clamping separately to do reciprocally swinging diametrically relative to inner ring, thus realize the wallowing motion of four oscillating bearings to be measured.
The first drive motor 14 and the second drive motor 22 can be made to work simultaneously, can test oscillating bearing to be measured under the condition of compound oscillating, and the loaded load be applied on oscillating bearing is measured by tension-compression sensor 32, friction temperature when measuring oscillating bearing inner ring and outer ring opposing oscillatory by temperature sensor 9, measures the radial line displacement of oscillating bearing outer ring relative to inner ring by displacement transducer 12.And by the adjustment to frequency-variable controller and hydraulic loaded cylinder, different load and different hunting frequencies can be applied to often overlapping oscillating bearing, and then the durability test cycle can be shortened.When other conditions are constant, also can only start one of them drive motor, thus independent oscillating bearing is tested in rotary oscillation condition or tested under wallowing motion condition.
In above-described embodiment, axial drive shaft and radial transmission shaft are parallel is respectively furnished with two, the test rack formed by two radial transmission shafts and two axial drive shaft is square, corresponding crossover location is also furnished with four, each radial transmission shaft all with at the two bearings fixture be furnished with by this radial transmission shaft and corresponding crossing two crossover locations formed of two axial drive shaft is in transmission connection, and so both can test four cover oscillating bearings simultaneously simultaneously.In other embodiments, the test rack that two axial drive shaft and two radial transmission shafts are formed is for time square, and the crossover location on test rack by two or three, can be tested two or three oscillating bearings so simultaneously.Also axial drive shaft can be made to walk abreast and to be furnished with two, and a radial transmission shaft is only set, so, the test rack that radial transmission shaft and two axial drive shaft walked abreast are formed will have two crossover locations, can test two oscillating bearings so simultaneously.Also radial transmission shaft can be made to be furnished with two, and an axial drive shaft is only set, so, the test rack that two radial transmission shafts and axial drive shaft are formed will have two crossover locations, can test two oscillating bearings equally simultaneously.Radial transmission shaft and the axial drive shaft of more than three can also be set certainly, the test rack formed by radial transmission shaft and axial drive shaft can be made like this to have multiple crossover location, so just can test multiple oscillating bearing simultaneously.
In above-described embodiment, the inner ring of oscillating bearing is connected with circumferential transmission shaft coaxial transmission by bearing pin dish, ring flange, and positioned by end face between bearing pin dish and ring flange, the installation accuracy of oscillating bearing can be improved like this, and then the additional wear of bearing pin dish and oscillating bearing can be reduced.
In above-described embodiment, outside bearing fixture, be furnished with the hydraulic loading mechanism loading fixture and be connected with loading fixture, apply different load by hydraulic loading mechanism to oscillating bearing to be measured, the durability test cycle of oscillating bearing can be shortened.In other embodiments, the hydraulic loading mechanism for applying different loads also can not be set, now need the testing machine with different loads to test oscillating bearing, can the test period be extended.
In above-described embodiment, two axial drive shaft are by the first driving mechanism synchronous axial system, two radial transmission shafts are then by the second driving mechanism synchronous axial system, in other embodiments, also can corresponding each transmission shaft arrange respectively independently driving mechanism to drive drive axis, can complete equally and under compound oscillating condition, oscillating bearing be tested, just now cannot carry out contrast test to four cover bearings.
In above-described embodiment, actuating unit is drive motor, drive motor is swung by the long fork in rotating disc, eccentric connecting pin and slider-actuated synchronous interaction mechanism, in other embodiments, actuating unit also can adopt oil motor, swung by the long fork of fluid motor-driven, and then drive two parallel transmission shaft synchronous axial system by synchronous interaction mechanism.
Claims (8)
1. compound swinging type joint bearing life testing machine, comprise the axial drive shaft for being connected with oscillating bearing inner ring coaxial transmission to be measured, for clamping the bearing fixture of oscillating bearing outer ring to be measured and the radial transmission shaft for being in transmission connection with bearing fixture, the axis of radial transmission shaft all with the intersect vertical axis of axial drive shaft, axial drive shaft and radial transmission shaft are all connected with the corresponding drive unit for driving corresponding transmission shaft reciprocating rotary to swing, it is characterized in that: described axial drive shaft and/or described radial transmission shaft are parallel is respectively furnished with at least two, all radial transmission shafts and axial drive shaft intersect to form the test rack for testing at least two cover oscillating bearings simultaneously, test rack at least has and intersects by the axis correspondence of radial transmission shaft and axial drive shaft two crossover locations formed, the equal correspondence in each crossover location place is furnished with the bearing fixture described in.
2. compound swinging type joint bearing life testing machine according to claim 1, it is characterized in that: each described bearing fixture is all equipped with loading fixture relative to the both sides of oscillating bearing to be measured, load and fixture is connected with for the hydraulic loading mechanism to oscillating bearing imposed load to be measured, hydraulic loading mechanism comprises hydraulic loaded cylinder and tension-compression sensor, and the piston rod in one end of tension-compression sensor and hydraulic loaded cylinder is connected, the other end and loading fixture are connected.
3. compound swinging type joint bearing life testing machine according to claim 2, it is characterized in that: described testing machine also comprises for the displacement transducer corresponding with each oscillating bearing to be measured, displacement transducer has for the measuring head with loading fixture top press contacts.
4. the compound swinging type joint bearing life testing machine according to claim 1 or 2 or 3, it is characterized in that: described axial drive shaft and radial transmission shaft are parallel is respectively furnished with two, what formed by two axial drive shaft and two radial transmission shafts can be square to the test rack that four cover oscillating bearings are tested simultaneously, the crossover location that described test rack has is furnished with four, bearing fixture correspondence is furnished with four, each radial transmission shaft all with at the two bearings fixture be furnished with by this radial transmission shaft and corresponding crossing two crossover locations formed of two axial drive shaft is in transmission connection.
5. compound swinging type joint bearing life testing machine according to claim 4, is characterized in that: described drive unit comprises for driving the first driving mechanism of two axial drive shaft synchronous axial system and for driving the second driving mechanism of two radial transmission shaft synchronous axial system.
6. compound swinging type joint bearing life testing machine according to claim 5, it is characterized in that: the first described driving mechanism, at least one driving mechanism in second driving mechanism comprises the synchronous interaction mechanism for driving two parallel transmission shaft synchronous axial system, synchronous interaction mechanism comprises parallel two forks extended, two forks respectively correspondence are connected on two transmission shafts, and extend along the radial direction of transmission shaft, kinematic link is provided with between two forks, the two ends of kinematic link are hinged on two forks respectively, two forks, two transmission shafts of kinematic link and correspondence form parallelogram linkage, driving mechanism also comprises the actuating unit being connected with one of them swing link transmission in described synchronous interaction mechanism to drive this fork to swing.
7. compound swinging type joint bearing life testing machine according to claim 6, it is characterized in that: described actuating unit comprises drive motor, the power output shaft of drive motor is coaxially installed with rotating disc, on rotating disc, bias is installed with eccentric connecting pin, the fork be in transmission connection with actuating unit in described two forks is that power inputs fork, power input fork on slidable fit have slide block, slide block and described eccentric connecting pin hinged.
8. compound swinging type joint bearing life testing machine according to claim 7, is characterized in that: described drive motor is connected with frequency-variable controller.
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| CN201310191988.XA CN103323241B (en) | 2013-05-22 | 2013-05-22 | Composite swing type joint bearing service life testing machine |
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| CN201310191988.XA CN103323241B (en) | 2013-05-22 | 2013-05-22 | Composite swing type joint bearing service life testing machine |
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| CN103323241B true CN103323241B (en) | 2015-06-17 |
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Application publication date: 20130925 Assignee: Taizhou Kejin Bearings Co., Ltd. Assignor: Henan University of Science and Technology Contract record no.: X2019980000622 Denomination of invention: Composite swing type joint bearing service life testing machine Granted publication date: 20150617 License type: Exclusive License Record date: 20191118 |
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