CN104897401A - Bearing static performance testing apparatus - Google Patents
Bearing static performance testing apparatus Download PDFInfo
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- CN104897401A CN104897401A CN201510274137.0A CN201510274137A CN104897401A CN 104897401 A CN104897401 A CN 104897401A CN 201510274137 A CN201510274137 A CN 201510274137A CN 104897401 A CN104897401 A CN 104897401A
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Abstract
The invention relates to the technical field of testing bearings, especially to a bearing static performance testing apparatus. The bearing static performance testing apparatus comprises a pedestal, a test head assembly and a test loading mechanism are arranged on the pedestal, and the test loading mechanism comprises an axial force loading mechanism and a turnover force loading mechanism. The turnover force loading mechanism comprises a force transmission arm, which has a force input end and a force output end for transmitting axial force to a bearing to be tested. The force loading direction of the axial force loading mechanism is always the same with the axis extension direction of the bearing to be tested. Since the test loading mechanism comprises an axial force loading mechanism and a turnover force loading mechanism, and the force loading direction of the axial force loading mechanism is always the same with the axis extension direction of the bearing to be tested, the loading means is more suitable for the actual conditions of a bearing. The bearing static performance testing apparatus can accurately simulates the state of the bearing subjected to a turnover force, and the accuracy of test results of static bearing features can be improved.
Description
Technical field
The present invention relates to bearing test technical field, particularly relate to a kind of bearing static properties test unit.
Background technology
Along with the development of science and technology and improving constantly of human cost, manufacturing industry is just towards robotization, the fast development of intelligentized direction, and as the important embodiment of advanced manufacturing industry, therefore Robotics and related industry thereof also obtain and develop rapidly.And robot bearing is the crucial kit of industrial robot, all there is very important impact to the smoothness of operation of robot, repetitive positioning accuracy, the key index such as action degree of accuracy and functional reliability.
In China, because robot application engineering is started late, its self-contained bearing is generally with main frame import.Industrial robot bearing is a relatively weak link, and existing bearing national standard can not meet and instruct design, the production of industrial robot bearing, says nothing of the robot bearing experimental technique of formation system.Therefore, in current domestic industry robot self-contained bearing, major part relies on import, and the sales volume of home market accounts for the ratio of total sales volume less than 10%.If the test unit of a set of robot bearing can be designed and find out a set of effective test method, then bring strong support will certainly to the production of robot bearing and research and development.
And the static rigidity analysis of experiments to bearing, all shorter mentions of research in the past, just less to the research of robot thin-wall bearing.Bearing static parameter is the Static stiffness that holds of spindle mainly.In essence, bearing static characteristics refers to the Static Contact characteristic of rolling body and the inside and outside circle surface of contact of bearing under load effect.The different impact of load-up condition on thin-wall bearing static rigidity of application test technique study has important value.
About the analysis of the static characteristics to bearing, " Institutes Of Technology Of Nanjing " discloses a kind of bearing static characteristic test platform for 2014, wherein this testing table comprises platform and is located at the tested bearing mounting base on platform, described tested bearing mounting base is provided with axial load maintainer and radial loaded mechanism, during use by axial load maintainer to tested bearing imposed load to study tested bearing static characteristics under axial loading, by radial loaded mechanism to tested bearing imposed load to study the static characteristics of tested bearing under radial load.But the thin-wall bearing that bearing, particularly robot are used is except being subject to except axial load in real work, and it in most cases also needs the impact being subject to tipping load, above-mentioned testing table then cannot meet the test of bearing by upsetting moment state.
About the characteristic research be subject to bearing under upsetting moment state, the Chinese patent instructions that notification number is CN203869867U, the day for announcing is on October 8th, 2014 discloses a kind of bearing test charger with upsetting moment function, this bearing test charger is suspended on the output main shaft of drive system, includes test bearing, loading arm, upsetting moment load cylinder and axial load cylinder; The outer ring of test bearing is connected with output main shaft by test axle; Inner ring and the loading arm of test bearing connect firmly; All connect firmly with loading arm with one end of two load bars of test bearing eccentric setting, the other end is connected with the piston rod of corresponding upsetting moment load cylinder respectively; Axial load cylinder is hinged with loading arm between two upsetting moment load cylinders, wherein the hinge axes at the articulated position place of axial load cylinder and loading arm and the line of two upsetting moment load cylinders orthogonal, when upsetting moment load cylinder orders about loading arm to test bearing applying upsetting moment, axial load cylinder relatively rotates in hinged place relative to loading arm.
Known by introducing above, in above-mentioned bearing test charger, it is the relation be hinged between axial force load cylinder and loading arm, therefore when carrying out bearing and be subject to the test of axial loading moment and upsetting moment state simultaneously, do not conform to the actual conditions, because bearing in actual use, its axial loading force can not change angle because of the existence of upsetting moment relative to bearing.Therefore, above-mentioned bearing test charger also exists the inaccurate problem of test findings, even for bearing envelope test device, also cannot obtain test findings accurately.
Summary of the invention
The object of the present invention is to provide a kind of can accurate simulation bearing by the bearing static properties test unit of power state of toppling, to improve the accuracy of the result to bearing static characteristic test.
In order to solve the problem, bearing static properties test unit of the present invention is by the following technical solutions: bearing static properties test unit, comprise base, base is provided with the test head group part for installing tested bearing and tests load maintainer, test load maintainer comprises axial force load maintainer, described test load maintainer also comprises the power load maintainer that topples, the described power of toppling load maintainer comprises for the power transmission arm with tested bearing eccentric setting, described power transmission arm has power input end and the power output terminal for transmitting axial force to tested bearing, the power loading direction of described axial force load maintainer is identical with the Axis Extension direction of tested bearing all the time.
Described power transmission arm is arranged in pairs, and the power transmission arm of every a pair is oppositely arranged in the radial direction of tested bearing.
Described power transmission arm is connected with by lever force amplificatory structure the power loading component that topples, described lever force amplificatory structure comprises final stage lever, the power transmission arm of every a pair is connected to same final stage lever by input end, thus tested bearing can be made to be subject to the power of toppling to final stage lever-loading.
Described lever force amplificatory structure also comprises primary lever, is connected between primary lever with final stage lever by connecting rod, described in the power loading component that topples be located on the input end of primary lever.
The described power of toppling loading component is the power loading counterweight that topples.
The described power of toppling loading counterweight is movably assemblied on primary lever along the length direction of primary lever.
Axial force load maintainer comprises the axial force loading component supported by described power transmission arm.
Described test head group part comprises mandrel and the outer ring pressing plate for pressing down bearing outer ring, mandrel has the inner ring construction section for installing tested bearing inner race, described outer ring pressing plate is coordinated with mandrel by tested bearing outside, and the power output terminal of power transmission arm is connected with described outer ring pressing plate or mandrel.
The end of described inner ring construction section is provided with the inner ring pressing plate for precompressed bearing inner race, and inner ring pressing plate and mandrel are by being divided into pilot hole on the two and guidepost guide-localization coordinates.
Described inner ring construction section is provided with accompanies examination bearing and accompanies examination bearing and the spacer ring of tested bearing for separating.
Test load maintainer due to bearing static properties test unit of the present invention comprises axial force load maintainer and the power load maintainer that topples, and the power loading direction of axial force load maintainer is identical with the Axis Extension direction of tested bearing all the time, namely no matter be under the state of power load maintainer work of toppling, or when the power load maintainer of toppling unloads, the loading direction of axial force load maintainer is constant all the time, this load mode meets the actual condition of bearing more, thus can accurate simulation bearing by the bearing static properties test unit of power state of toppling, improve the accuracy to the result of bearing static characteristic test.
Accompanying drawing explanation
Fig. 1 is the structural representation of a kind of embodiment of bearing static properties test unit;
Fig. 2 is the structural representation of the test head group part in Fig. 1;
Fig. 3 is the assembling schematic diagram of power of toppling loading component in Fig. 1 and primary lever;
Fig. 4 is bearing holder (housing, cover) vertical view;
Fig. 5 is the loading force schematic diagram of test load maintainer.
Embodiment
The embodiment of bearing static properties test unit, as Figure 1-4, this test unit comprises base 11, test head group part, test load maintainer and trial value acquisition system.
Base 11 is the bases carrying whole test unit, and in the present embodiment, what base 11 specifically adopted is a horizontal table.
In the present embodiment, testing head group part is be located on base 11 by the supporting seat 12 of a up-small and down-big ladder shaft type.Wherein fixedly be assembled together by screw between supporting seat 12 and base 11, test head group part comprises mandrel 13, outer ring pressing plate 14 and inner ring pressing plate 15, mandrel 13 be multidiameter, comprise the path section on top and the large footpath section of bottom, its small diameter section forms inner ring construction section, and inner ring construction section is for installing the inner ring of tested bearing 16.Mandrel 13 by bolt removable be fixedly assemblied on supporting seat 12, the integral replacing to test head group part can be realized by dismounting mandrel 13, thus meet the test to different model bearing.The upper end of inner ring construction section is located at by inner ring pressing plate 15, it is for providing a precompression for the inner ring of tested bearing 16, due to when tested bearing 16 is robot thin-wall bearing, its space structure is limited, the upper end of mandrel 13 is provided with guidepost 17, inner ring pressing plate 15 is provided with the pilot hole corresponding with guidepost 17, by working in coordination of guidepost 17 and pilot hole, better can fix tested bearing 16, solve problem that tested bearing 16 is difficult to locate, make test unit more stable.The downside of outer ring pressing plate 14 is fixedly connected with bearing holder (housing, cover) 18 and is coordinated with the large footpath section of mandrel 13 by bearing holder (housing, cover) 18, the jacket wall of bearing holder (housing, cover) 18 is provided with connecting hole and measured hole 19, in the present embodiment, connecting hole is specially threaded hole, measured hole 19 has six and center line around bearing holder (housing, cover) 18 distributes, each measured hole 19 is through hole, the axial deflection of tested bearing 16 can be measured by measured hole 19, the axial deflection of tested bearing 16 can be obtained by the change in location of the lower surface measuring bearing holder (housing, cover) 18.The endoporus of bearing holder (housing, cover) 18 is stepped hole, making therefrom inner wall surface thereof defines can the step of support bearing outer ring, in the present embodiment, step in bearing holder (housing, cover) 18 is set to petal-shaped, be convenient to the dismounting of tested bearing, wherein said step petal is that the arc-shaped slot 501 by opening on step is vertically formed.In the present embodiment, except above-mentioned mandrel 13, inner ring pressing plate 15 and outer ring pressing plate 14, test head group part also comprises internal gasket 20, outer pad 21, spacer ring 22 and accompanies examination bearing 23.Internal gasket 20 is for padding between inner ring pressing plate 15 and the inner ring of tested bearing 16, outer pad 21 is for padding between outer ring pressing plate 14 and the outer ring of tested bearing 16, in the present embodiment, the pad of one is not directly set on inside and outside circle pressing plate, but have employed in the internal gasket of inner ring pressing plate split, the outer pad corresponding with outer ring pressing plate, do like this is rupture to prevent gasket stress from concentrating on the one hand, also be in order to load can be applied on tested bearing 16 uniformly on the other hand, ensure that reliability and the accuracy of device entirety.Examination bearing 23 is accompanied to be located on the inner ring construction section of mandrel 13, spacer ring 22 is accompanied between the examination inner ring of bearing 23 and the inner ring of tested bearing 16 for being interposed between, during use, inner ring pressing plate 15 is to pressing down internal gasket 20, internal gasket 20 and then press the inner ring of tested bearing 16, the inner ring pressure spacer ring 22 of tested bearing 16, spacer ring 22 pressure accompanies the inner ring of examination bearing 23, finally accompanying the inner ring of examination bearing 23 to be pressed on the intersegmental step in the large and small footpath of mandrel 13, and then stop the inner ring of tested bearing 16 to rotate, in addition, examination bearing 23 is accompanied can to prevent test head from tumbling.When being subject to upsetting moment, because bearing deformation is less, being equivalent to test bearing and accompanying examination bearing all being clamped completely always.Accompany examination bearing can offset the upsetting moment of test bearing half, but axis and the radial displacement of test bearing can not be affected.In describing above, accompany the effect of examination bearing 23 known, accompany examination bearing 23 to be actually omissible, therefore in other embodiment of test unit, can not accompany examination bearing.
Test load maintainer comprises axial force load maintainer and the power load maintainer that topples.
The power load maintainer of toppling comprises power transmission arm 24 and the power loading component that topples, in the present embodiment, power transmission arm 24 has a pair, it is positioned at the radial both sides place of tested bearing 16 when device works, each power transmission arm 24 includes power input end and the power output terminal for transmitting axial force to tested bearing 16, and wherein the power output terminal of power transmission arm 24 and bearing holder (housing, cover) 18 are bolted to connection.Power of toppling loading component is connected with power transmission arm 24 by lever force amplificatory structure, and in the present embodiment, what the power loading component of toppling specifically adopted is that power of toppling loads counterweight 25.Lever force amplificatory structure comprises two-stage lever, be respectively primary lever 26 and final stage lever 27, what final stage lever 27 adopted is split-type structural, comprise power transmission arm linkage section 271 and power access section 272, wherein power transmission arm linkage section 271 and power access releasable connection between section 272, power transmission arm linkage section 271 adopts square steel, power transmission arm is connected with power transmission arm linkage section 271 by the sliding sleeve 28 set by its upper end, when pressing down or above push away final stage lever 27 input end (one end away from sliding sleeve), load will be passed to bearing holder (housing, cover) 18 via power transmission arm 24, and then to tested bearing 16 outer ring and form power load of toppling.One end of primary lever 26 is on the pedestal 11 hinged by a free bearing 29, the other end forms cantilever design, the input end of final stage lever 27 is linked together by a connecting rod 30 one end with the close free bearing of primary lever 26, wherein connecting rod 30 comprises epimere 301 and hypomere 302, linked together by bearing pin 31 between epimere 301 and hypomere 302, upper and lower section, by pinned connection, is similar to human synovial a little.Because when applying upsetting moment to tested bearing, device can produce very small deflection, if it is bending to adopt the straight-bar of integral type that straight-bar will be caused to produce.But after adopting the structure of pinned connection, then regulate the bolt of below, namely adjustable makes 301 and 302 to keep vertical state.Thus can the level and smooth transmission of realizable force, it is to be noted herein, the epimere 301 of connecting rod 30 is also be connected with final stage lever 27 by sliding sleeve, thus the length of the arm of force of adjustable final stage lever 27, in order to accurately obtain the length variations of the arm of force of final stage lever 27, the position coordinated with connecting rod 30 of final stage lever 27 is also provided with scale and pastes 32, sliding sleeve on the epimere of connecting rod 30 is provided with the reading hole 33 for reading scale subsides reading, the lower end of connecting rod 30 is connected with primary lever 26 by bolt arrangement, the fine setting to primary lever 26 can be realized, make it maintenance level.The power loading component of toppling is located on primary lever 26, in the present embodiment, power of toppling loading component is located on primary lever 26 by a slide, the limited post 35 that slide comprises slide block 34 and is located on slide block 34, primary lever 26 is provided with the chute of the dovetail groove type corresponding with slide block 34, by coordinating of slide block 34 and chute, just adjustable is toppled the position of power loading component on primary lever 26, when determining position, limited post 35 is screwed on slide block 34, makes to correct compression primary lever 26 for 35 times.Automatic guarantee limited post, the position of slide block on primary lever remain unchanged.And then the length of the arm of force of adjustment primary lever 26, in order to read the length of the arm of force of primary lever 26 at any time, primary lever being also provided with scale and pasting.
Axial force load maintainer comprises axial force loading component, it is supported on power transmission arm 24, in the present embodiment, what axial force loading component specifically adopted is that axial force loads counterweight 36, arrange gag lever post 37 on the upside of the power transmission arm linkage section of final stage lever and form inverted T-shape, it is be located on gag lever post 37 that axial force loads counterweight 36.
Trial value acquisition system comprises radial deformation detecting sensor and axial deformation detecting sensor, measured hole one_to_one corresponding wherein on radial deformation detecting sensor and above-mentioned bearing holder (housing, cover), to be used for detecting the radial-deformation of tested bearing, axial deformation detecting sensor is located at the lower end of bearing holder (housing, cover), for being drawn the axial deflection of tested bearing by the change in location of detection axis bearing sleeve lower surface.
When using this test unit to carry out static properties test to bearing, first tested bearing can be contained on test head group part, then will test head group part integral installation upper support seat, power transmission arm is connected with final stage lever and bearing holder (housing, cover) respectively.When needing to study the static characteristics of bearing under axial moment effect, the power transmission arm linkage section of final stage lever and power can be accessed section to disconnect, by means of only arranging axial force loading component, the distortion of tested bearing under axial moment effect is detected by axial deformation detecting sensor, in experimentation, the quantity loading counterweight by changing axial force adjusts the size of axial force.When needing to bear tested bearing the Study on Static Characteristic under axial moment and upsetting moment state simultaneously, two parts of final stage lever are connected, in process of the test, if regulate the size of the power of toppling, then load the quantity of counterweight, the relative position relation of regulating connecting rod and final stage lever or adjustment power of toppling by increase and decrease power of toppling and loads the mode of the position of counterweight on primary lever or above three kinds of modes are also used.
Fig. 4 shows the loading force schematic diagram of test load maintainer, for power of toppling loads the weight of counterweight in figure, for test head group part, the general assembly (TW) of tested bearing and test load maintainer, for axial force loads the weight of counterweight, for connecting rod is to the acting force of final stage lever, for the link position of connecting rod and primary lever is to the horizontal range between primary lever and the articulated position of free bearing, for the power loading component that topples is to the horizontal range between primary lever and the articulated position of free bearing, for the link position of connecting rod and final stage lever is to the horizontal range of supporting seat axial line, for test head group part, the barycenter of tested bearing and test load maintainer is to the horizontal range of supporting seat axial line.Then can calculate according to computing formula below upsetting moment and axial force that test bearing loads, concrete test formula is as follows:
Wherein, for acting on the total upsetting moment on test bearing, for acting on axial force total on test bearing.
In other embodiment of bearing static properties test unit, test load maintainer can also be connected with bearing inner race pressing plate, thus is loaded to test bearing by tested bearing inner race; The quantity of power transmission arm be more than one all can, preferably can arrange in pairs, the power transmission arm of every a pair is all symmetrical arranged relative to the center line of tested bearing in the radial direction of tested bearing; Axial force load maintainer and the power load maintainer of toppling can also adopt cylinder, oil cylinder, screw-nut body etc.
Claims (10)
1. bearing static properties test unit, comprise base, base is provided with the test head group part for installing tested bearing and tests load maintainer, test load maintainer comprises axial force load maintainer, it is characterized in that, described test load maintainer also comprises the power load maintainer that topples, the described power of toppling load maintainer comprises for the power transmission arm with tested bearing eccentric setting, described power transmission arm has power input end and the power output terminal for transmitting axial force to tested bearing, and the power loading direction of described axial force load maintainer is identical with the Axis Extension direction of tested bearing all the time.
2. bearing static properties test unit according to claim 1, is characterized in that, described power transmission arm is arranged in pairs, and the power transmission arm of every a pair is oppositely arranged in the radial direction of tested bearing.
3. bearing static properties test unit according to claim 2, it is characterized in that, described power transmission arm is connected with by lever force amplificatory structure the power loading component that topples, described lever force amplificatory structure comprises final stage lever, the power transmission arm of every a pair is connected to same final stage lever by input end, thus tested bearing can be made to be subject to the power of toppling to final stage lever-loading.
4. bearing static properties test unit according to claim 3, it is characterized in that, described lever force amplificatory structure also comprises primary lever, is connected between primary lever with final stage lever by connecting rod, described in the power loading component that topples be located on the input end of primary lever.
5. bearing static properties test unit according to claim 3, is characterized in that, described in topple power loading component for topple power load counterweight.
6. bearing static properties test unit according to claim 5, is characterized in that, described in power of toppling load counterweight and be movably assemblied on primary lever along the length direction of primary lever.
7. bearing static properties test unit according to claim 1, is characterized in that, axial force load maintainer comprises the axial force loading component supported by described power transmission arm.
8. bearing static properties test unit according to claim 1, it is characterized in that, described test head group part comprises mandrel and the outer ring pressing plate for pressing down bearing outer ring, mandrel has the inner ring construction section for installing tested bearing inner race, described outer ring pressing plate is coordinated with mandrel by tested bearing outside, and the power output terminal of power transmission arm is connected with described outer ring pressing plate or mandrel.
9. bearing static properties test unit according to claim 8, it is characterized in that, the end of described inner ring construction section is provided with the inner ring pressing plate for precompressed bearing inner race, and inner ring pressing plate and mandrel are by being divided into pilot hole on the two and guidepost guide-localization coordinates.
10. bearing static properties test unit according to claim 8, is characterized in that, described inner ring construction section is provided with accompanies examination bearing and accompany examination bearing and the spacer ring of tested bearing for separating.
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| CN201510274137.0A CN104897401B (en) | 2015-05-26 | 2015-05-26 | Bearing static properties experimental rig |
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| CN201510274137.0A CN104897401B (en) | 2015-05-26 | 2015-05-26 | Bearing static properties experimental rig |
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| CN104897401B CN104897401B (en) | 2017-10-31 |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN106769045A (en) * | 2017-01-06 | 2017-05-31 | 洛阳轴研科技股份有限公司 | A kind of RV decelerators base bearing performance testing device |
| CN107860570A (en) * | 2017-10-31 | 2018-03-30 | 华中科技大学无锡研究院 | A kind of industrial robot stiffness measurement loading device and measuring method |
| CN114323645A (en) * | 2020-09-25 | 2022-04-12 | 株洲中车时代电气股份有限公司 | Traction motor bearing testing machine |
| CN114354191A (en) * | 2021-12-15 | 2022-04-15 | 八环科技集团股份有限公司 | Bearing testing machine and testing method |
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| CN114323645A (en) * | 2020-09-25 | 2022-04-12 | 株洲中车时代电气股份有限公司 | Traction motor bearing testing machine |
| CN114323645B (en) * | 2020-09-25 | 2023-03-10 | 株洲中车时代电气股份有限公司 | Traction motor bearing testing machine |
| CN114354191A (en) * | 2021-12-15 | 2022-04-15 | 八环科技集团股份有限公司 | Bearing testing machine and testing method |
| CN114354191B (en) * | 2021-12-15 | 2024-07-05 | 八环科技集团股份有限公司 | Bearing testing machine and testing method |
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Application publication date: 20150909 Assignee: Luoyang Hongyuan Bearing Technology Co., Ltd. Assignor: Henan University of Science and Technology Contract record no.: X2019980000618 Denomination of invention: Bearing static performance testing apparatus Granted publication date: 20171031 License type: Exclusive License Record date: 20191118 |
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