CN104897401B - Bearing static properties experimental rig - Google Patents
Bearing static properties experimental rig Download PDFInfo
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- CN104897401B CN104897401B CN201510274137.0A CN201510274137A CN104897401B CN 104897401 B CN104897401 B CN 104897401B CN 201510274137 A CN201510274137 A CN 201510274137A CN 104897401 B CN104897401 B CN 104897401B
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Abstract
The present invention relates to bearing test technical field, particularly to a kind of bearing static properties experimental rig.The bearing static properties experimental rig includes base, base is provided with experiment head assembly and experiment load maintainer, experiment load maintainer includes axial force load maintainer and the power load maintainer that topples, power of toppling load maintainer includes power transmission arm, power transmission arm has power input and the power output end for transmitting axial force to subject bearing, and the power loading direction of axial force load maintainer is identical with being tested the axis bearing of trend of bearing all the time.Because experiment load maintainer includes axial force load maintainer and the power load maintainer that topples, and the power loading direction of axial force load maintainer is identical with being tested the axis bearing of trend of bearing all the time, this load mode more conforms to the actual condition of bearing, so as to bearing static properties experimental rig of the accurate simulation bearing by power state of toppling, the degree of accuracy to the result of bearing static characteristic test is improved.
Description
Technical field
The present invention relates to bearing test technical field, particularly to a kind of bearing static properties experimental rig.
Background technology
With the development and the continuous improvement of human cost of science and technology, manufacturing industry is just fast towards automation, intelligentized direction
Speed development, as the important embodiment of advanced manufacturing industry, therefore robot technology and its related industry have also obtained rapid development.
And robot bearing is the crucial kit of industrial robot, to the smoothness of operation of robot, repetitive positioning accuracy, action
The key index such as accuracy and functional reliability has highly important influence.
In China, because robot application engineering is started late, its self-contained bearing is general with main frame import.Industrial machine
Device people's bearing is a weak link relatively, and existing bearing national standard can not meet and instruct industrial robot bearing
Design, production, not to mention form the robot bearing experimental technique of system.Therefore, the current supporting axle of domestic industry robot
In holding, import is largely relied on, the sales volume of domestic market accounts for the ratio of total sales volume less than 10%.If one can be designed
The experimental rig of set robot bearing simultaneously finds out a set of effective test method, then will certainly give the life of robot bearing
Production and research and development bring strong support.
And to the static rigidity analysis of experiments of bearing, conventional research all shorter mentions, to robot thin-wall bearing
Research is just less.Bearing static parameter is primarily referred to as the Static stiffness of bearing.Substantially, bearing static characteristic refers to that load is acted on
The Static Contact characteristic of lower rolling element and the inside and outside circle contact surface of bearing.The different load-up condition of application test technique study is to thin
The influence of wall bearing static rigidity has important value.
On the analysis of the static characteristic to bearing,《Institutes Of Technology Of Nanjing》Disclose within 2014 a kind of bearing static characteristic
Testing stand, the wherein testing stand are included on platform and the subject bearing mounting base on platform, the subject bearing mounting base
Provided with axially loaded mechanism and radial loaded mechanism, subject bearing imposed load can be ground by axially loaded mechanism when using
Subject bearing static characteristic under axial loading is studied carefully, by radial loaded mechanism to subject bearing imposed load to study subject
Static characteristic of the bearing under radial load.However, the thin-wall bearing that bearing, particularly robot are used is removed in real work
Can be by beyond axial load, it also needs to be influenceed by tipping load in most cases, and above-mentioned testing stand can not then expire
Foot is tested by tilting moment state bearing.
On to bearing, by the characteristic research under tilting moment state, notification number is CN203869867U, the day for announcing to be
The Chinese patent specification on October 8th, 2014 discloses a kind of bearing test loading device with tilting moment function, should
Bearing test loading device is suspended on the output main shaft of drive system, includes test bearing, loading arm, tilting moment loading
Oil cylinder and axially loaded oil cylinder；The outer ring of test bearing is connected by testing axle with output main shaft；The inner ring of test bearing is with adding
Load arm is connected firmly；Connected firmly with one end of two load bars of test bearing eccentric setting with loading arm, the other end respectively with pair
The piston rod of tilting moment load cylinder is answered to connect；Axially loaded oil cylinder be located between two tilting moment load cylinders and with
Loading arm is hinged, wherein the hinge axes at the articulated position of axially loaded oil cylinder and loading arm and two tilting moment load cylinders
Line it is orthogonal, when tilting moment load cylinder drive loading arm to test bearing apply tilting moment when, it is axially loaded
Oil cylinder is relatively rotated relative to loading arm in hinged place.
By described above, in above-mentioned bearing test loading device, between axial force load cylinder and loading arm
It is the relation being hinged, therefore when progress bearing is tested by axially loaded torque and tilting moment state simultaneously, with reality
Border is not inconsistent, because bearing is in actual use, its axially loaded power be will not because of tilting moment presence and relative to
Bearing changes angle.Therefore, above-mentioned bearing test loading device has the problem of result of the test is inaccurate, even being used for
On bearing static test device, accurate result of the test can not be also obtained.
The content of the invention
It can be tried it is an object of the invention to provide a kind of with accurate simulation bearing by the bearing static properties for power state of toppling
Experiment device, to improve the degree of accuracy of the result to bearing static characteristic test.
In order to solve the above problems, bearing static properties experimental rig of the invention uses following technical scheme：Bearing is quiet
State performance test apparatus, including base, base are provided with the experiment head assembly for being used for installing subject bearing and experiment load maintainer,
Testing load maintainer includes axial force load maintainer, and the experiment load maintainer also includes the power load maintainer that topples, described to topple
Power load maintainer includes being used for the power transmission arm with being tested bearing eccentric setting, and the power transmission arm has power input and for quilt
Try the power output end that bearing transmits axial force, the power loading direction of the axial force load maintainer is all the time with being tested the axis of bearing
Bearing of trend is identical.
The power transmission arm is arranged in pairs, and every a pair of power transmission arm is in the diametrically opposed of subject bearing.
The power transmission arm is connected with the power loading component that topples, the lever power enlarger by lever force amplificatory structure
Structure includes final stage lever, and every a pair of power transmission arm is connected to same final stage lever by input, so as to add to final stage lever
Load can make subject bearing be toppled power.
The lever force amplificatory structure also includes primary lever, is connected between primary lever and final stage lever by connecting rod
Connect, the power of the toppling loading component is on the input of primary lever.
The power of the toppling loading component is the power loading counterweight that topples.
Length direction of the power of the toppling loading counterweight along primary lever is movably assemblied on primary lever.
Axial force load maintainer includes the axial force loading component supported by the power transmission arm.
The experiment head assembly includes mandrel and the outer ring pressing plate for depressing bearing outer ring, and mandrel, which has, to be used to install quilt
The inner ring construction section of bearing inner race is tried, the outer ring pressing plate coordinates by being tested bearing outside with mandrel, the power output of power transmission arm
End is connected with the outer ring pressing plate or mandrel.
The end of the inner ring construction section is provided with the inner ring pressing plate for precompressed bearing inner race, and inner ring pressing plate passes through with mandrel
The pilot hole and lead guide-localization being divided on the two coordinate.
The inner ring construction section is provided with the spacer ring accompanied examination bearing and examination bearing and subject bearing are accompanied for separating.
Because the experiment load maintainer of the bearing static properties experimental rig of the present invention includes axial force load maintainer and inclines
Power load maintainer is covered, and the power loading direction of axial force load maintainer is identical with being tested the axis bearing of trend of bearing all the time,
I.e. either in the state of power load maintainer work of toppling, or in the case where the power load maintainer that topples is unloaded, axial force
The loading direction of load maintainer is constant all the time, and this load mode more conforms to the actual condition of bearing, so as to accurate simulation
Bearing is improved the degree of accuracy to the result of bearing static characteristic test by the bearing static properties experimental rig for power state of toppling.
Brief description of the drawings
Fig. 1 is a kind of structural representation of embodiment of bearing static properties experimental rig；
Fig. 2 is the structural representation of the experiment head assembly in Fig. 1；
Fig. 3 is the assembling schematic diagram of topple power loading component and the primary lever in Fig. 1；
Fig. 4 is bearing holder (housing, cover) top view；
Fig. 5 is the loading force schematic diagram for testing load maintainer.
Embodiment
The embodiment of bearing static properties experimental rig, as Figure 1-4, the experimental rig include base 11, experiment head
Component, experiment load maintainer and test value acquisition system.
Base 11 is the basis for carrying whole experimental rig, in the present embodiment, and base 11 specifically uses a water
Flat workbench.
In the present embodiment, experiment head assembly is to be located at base by the support base 12 of a up-small and down-big ladder shaft type
On 11.Wherein support base 12 between base 11 by the way that together with screw fixing assembling, experiment head assembly includes mandrel 13, outer ring
Pressing plate 14 and inner ring pressing plate 15, the wherein path section and the big footpath section of bottom for multi-diameter shaft, including top of mandrel 13, path section
Inner ring construction section is formed, inner ring construction section is used for the inner ring for installing subject bearing 16.Mandrel 13 passes through the removable fixed dress of bolt
Fit on support base 12, by dismantling the i.e. achievable integral replacing to testing head assembly of mandrel 13, so as to meet to different shaped
The experiment of number bearing.Inner ring pressing plate 15 is located at the upper end of inner ring construction section, and it is used to provide one to be tested the inner ring of bearing 16
Precompression, because when it is robot thin-wall bearing to be tested bearing 16, its space structure is limited, is provided with the upper end of mandrel 13 and leads
To post 17, inner ring pressing plate 15 be provided with the corresponding pilot hole of lead 17, by working in coordination for lead 17 and pilot hole,
Subject bearing 16 can be preferably fixed, the problem of subject bearing 16 is difficult to positioning is solved, experimental rig is more stablized.Outer ring
The downside of pressing plate 14 is fixedly connected with bearing holder (housing, cover) 18 and coordinated by the big footpath section of bearing holder (housing, cover) 18 and mandrel 13, the set of bearing holder (housing, cover) 18
Wall is provided with connecting hole and measured hole 19, and in the present embodiment, connecting hole is specially screwed hole, and measured hole 19 has six and around axle
The center line distribution of bearing sleeve 18, each measured hole 19 is through hole, and the axial direction of subject bearing 16 can be measured by measured hole 19
Deflection, can obtain being tested the axial deflection of bearing 16 by measuring the change in location of lower surface of bearing holder (housing, cover) 18.Bearing
Set 18 endoporus be stepped hole, therefrom cause inner wall surface thereof on form can support bearing outer ring step, in the present embodiment
In, the step in bearing holder (housing, cover) 18 is set to petal-shaped, is easy to be tested the dismounting of bearing, wherein the petal of the step is by edge
What the arc-shaped slot 501 axially opened on step was constituted.In the present embodiment, except above-mentioned mandrel 13, inner ring pressing plate
15 and outer ring pressing plate 14 beyond, experiment head assembly also include internal gasket 20, outer pad 21, spacer ring 22 and accompany examination bearing 23.Interior pad
Piece 20 is used to pad between the inner ring of inner ring pressing plate 15 and subject bearing 16, and outer pad 21 is used to pad in outer ring pressing plate 14 and subject
Between the outer ring of bearing 16, in the present embodiment, the pad of one is directly set without including, on the pressing plate of outer ring, but employ
Internal gasket, outer pad corresponding with outer ring pressing plate in inner ring pressing plate split, so do partly in order to preventing gasket stress
Concentrate and be broken, on the other hand can be uniformly applied on subject bearing 16 also for load, it is ensured that device is whole
The reliability of body and the degree of accuracy.Examination bearing 23 is accompanied on the inner ring construction section of mandrel 13, spacer ring 22 is used to be interposed between to accompany examination bearing
Between 23 inner ring and the inner ring of subject bearing 16, in use, inner ring pressing plate 15 is pressed downward internal gasket 20, internal gasket 20 and then pressure
It is tested the inner ring of bearing 16, the inner ring pressure spacer ring 22 of subject bearing 16, spacer ring 22 presses the inner ring for accompanying examination bearing 23, finally accompanying examination
The inner ring of bearing 23 is pressed on the intersegmental step in the large and small footpath of mandrel 13, and then prevents the inner ring of subject bearing 16 from rotating, separately
Outside, examination bearing 23 is accompanied to prevent experiment head from tumbling.In the case of by tilting moment, because bearing deformation is smaller, equivalent to
Test bearing and accompany examination bearing all clamped completely always.Examination bearing is accompanied to offset the tilting moment of test bearing half, but
The axially and radially displacement of test bearing is not interfered with.By accompanying the effect of examination bearing 23 in above description, examination bearing is accompanied
23 is actually omissible, therefore in the other embodiments of experimental rig, can not accompany examination bearing.
Experiment load maintainer includes axial force load maintainer and the power load maintainer that topples.
Power of toppling load maintainer includes power transmission arm 24 and the power loading component that topples, and in the present embodiment, power transmission arm 24 has one
Right, it is when device works at the radially opposite sides of subject bearing 16, and each power transmission arm 24 includes power input and is used for
The power output end of axial force is transmitted to subject bearing 16, the wherein power output end of power transmission arm 24 is bolted with bearing holder (housing, cover) 18
Connection.Power of toppling loading component is connected by lever force amplificatory structure with power transmission arm 24, in the present embodiment, power of toppling loading
Part specifically uses the power loading counterweight 25 that topples.Lever force amplificatory structure includes two-stage lever, respectively primary lever
26 and final stage lever 27, final stage lever 27 uses split-type structural, including power transmission arm linkage section 271 and power access section 272,
Wherein releasable connection between power transmission arm linkage section 271 and power access section 272, power transmission arm linkage section 271 uses square steel, and power transmission arm leads to
Cross the sliding sleeve 28 set by its upper end to be connected with power transmission arm linkage section 271, when the input for pushing or above pushing away final stage lever 27 is (remote
From one end of sliding sleeve) when, load will be transferred to bearing holder (housing, cover) 18 via power transmission arm 24 and then extremely be tested the outer ring of bearing 16 and shape
Into power load of toppling.One end of primary lever 26 is hinged on the pedestal 11 by a free bearing 29, other end formation cantilever design,
The input of final stage lever 27 is linked together by one end of a connecting rod 30 and the close free bearing of primary lever 26, wherein connecting
Bar 30 includes epimere 301 and hypomere 302, is linked together between epimere 301 and hypomere 302 by bearing pin 31, upper and lower section passes through
Bearing pin is connected, and is somewhat similarly to human synovial.Because when applying tilting moment to subject bearing, device can produce very small
Deflection, if may result in straight-bar using the straight-bar of integral type produces bending.But after the structure connected using bearing pin, then adjust
The bolt of lower section, you can adjustment makes 301 and 302 holding vertical states.So that the smooth transmission of power can be realized, herein it may be noted that
, the epimere 301 of connecting rod 30 is also to be connected by sliding sleeve with final stage lever 27, so that the arm of force of adjustable final stage lever 27
Length, for the length change of the arm of force that accurately obtains final stage lever 27, the position coordinated with connecting rod 30 of final stage lever 27 is also
Provided with scale patch 32, the sliding sleeve on the epimere of connecting rod 30 is provided with the reading hole 33 that reading is pasted for reading scale, connecting rod 30
End is connected by bolt arrangement with primary lever 26, and the fine setting to primary lever 26 can be achieved, is allowed to keep level.Power of toppling adds
Part is carried on primary lever 26, in the present embodiment, power of toppling loading component is to be located at primary lever by a slide
On 26, slide includes sliding block 34 and the limited post 35 on sliding block 34, and primary lever 26 is provided with corresponding with sliding block 34
The chute of dovetail groove type, by the cooperation of sliding block 34 and chute, just can adjust and topples power loading component on primary lever 26
Position, it is determined that in the case of good position, limited post 35 is screwed on sliding block 34, corrects compression primary lever under making 35
26.The automatic position for ensureing limited post, sliding block on primary lever keeps constant.And then adjust the length of the arm of force of primary lever 26
It is short, for the length of the arm of force that reads primary lever 26 at any time, scale patch is also equipped with primary lever.
Axial force load maintainer includes axial force loading component, and it is supported on power transmission arm 24, in the present embodiment, axially
Power loading component specifically uses and sets gag lever post 37 on the upside of axial force loading counterweight 36, the power transmission arm linkage section of final stage lever
And inverted T-shape is formed, axial force loading counterweight 36 is on gag lever post 37.
Test value acquisition system includes radial deformation detection sensor and axial deformation detection sensor, wherein radial deformation
Detection sensor is corresponded with the measured hole on above-mentioned bearing holder (housing, cover), for the radial-deformation of detection subject bearing, axle
To deformation detection sensor located at bearing holder (housing, cover) lower end at, for drawn by detecting the change in location of bearing holder (housing, cover) lower surface by
Try the axial deflection of bearing.
, can be first by subject bearing mounted in experiment head assembly when carrying out static properties experiment to bearing using the experimental rig
On, experiment head assembly is integrally then loaded onto into support base, power transmission arm is connected with final stage lever and bearing holder (housing, cover) respectively.When needs pair
When static characteristic of the bearing under axial moment effect is studied, the power transmission arm linkage section of final stage lever and power can be accessed section
Disconnect, only by setting axial force loading component, can detect subject bearing in axle by axial deformation detection sensor
In deformation under to moment loading, experimentation, the big of axial force can be adjusted by changing the quantity of axial force loading counterweight
It is small.When needing that subject bearing is carried out bearing the Study on Static Characteristic under axial moment and tilting moment state simultaneously, by end
Two parts connection of level lever, in process of the test, if to adjust the size for power of toppling, is added by increasing and decreasing power of toppling
Quantity, regulation connecting rod and the relative position relation of final stage lever or adjustment for carrying counterweight topple power loading counterweight in primary lever
On position mode or three of the above mode and with.
Fig. 4 shows the loading force schematic diagram of experiment load maintainer, F1The weight of counterweight is loaded in figure for power of toppling, G is
Test head assembly, subject bearing and the gross weight for testing load maintainer, G1The weight of counterweight, G are loaded for axial force2For connecting rod
To the active force of final stage lever, a is the link position of connecting rod and primary lever between primary lever and the articulated position of free bearing
Horizontal range, b is to topple power loading component to the horizontal range between primary lever and the articulated position of free bearing, and c is connecting rod
Link position with final stage lever is to the horizontal range of support base axial line, and L is that experiment head assembly, subject bearing and experiment add
Horizontal range of the barycenter of mounted mechanism to support base axial line.It can then be calculated according to following calculation formula on test bearing
The tilting moment and axial force of loading, specific test formula are as follows：
Wherein, M is the total tilting moment acted on test bearing, FaTo act on axial direction total on test bearing
Power.
In the other embodiments of bearing static properties experimental rig, experiment load maintainer can also be with bearing inner race pressing plate
Connection, so as to be loaded by being tested bearing inner race to bearing to test；The quantity of power transmission arm for more than one all can, it is best
It can be arranged in pairs, every a pair of power transmission arm is symmetrically set in the diametrically opposite center line in subject bearing of subject bearing
Put；Axial force load maintainer and the power load maintainer that topples can also be using cylinder, oil cylinder, screw-nut bodies etc..
Claims (6)
1. bearing static properties experimental rig, including base, base be provided with the experiment head assembly that is used for installing subject bearing and
Load maintainer is tested, experiment load maintainer includes axial force load maintainer, it is characterised in that the experiment load maintainer also includes
Power of toppling load maintainer, the power of the toppling load maintainer includes being used for the power transmission arm with being tested bearing eccentric setting, the power transmission
Arm has power input and the power output end for transmitting axial force to subject bearing, the power loading of the axial force load maintainer
Direction is identical with being tested the axis bearing of trend of bearing all the time, and the power transmission arm is arranged in pairs, and every a pair of power transmission arm is in subject
Bearing it is diametrically opposed, the power transmission arm is connected with the power loading component that topples by lever force amplificatory structure, described
Lever force amplificatory structure includes final stage lever, and every a pair of power transmission arm is connected to same final stage lever by input, from
And to final stage lever-loading subject bearing can be made to be toppled power, the experiment head assembly includes mandrel and for depressing bearing
The outer ring pressing plate of outer ring, mandrel has the inner ring construction section for being used for installing subject bearing inner race, and the outer ring pressing plate passes through subject
Bearing outside coordinates with mandrel, and the power output end of power transmission arm is connected with the outer ring pressing plate, and the inner ring construction section is provided with and accompanied
Examination bearing and the spacer ring that examination bearing and subject bearing are accompanied for separating；In the case of by tilting moment, because bearing becomes
Shape is smaller, accompanies examination bearing to offset the tilting moment of test bearing half, the axially and radially position without influenceing test bearing
Move.
2. bearing static properties experimental rig according to claim 1, it is characterised in that the lever force amplificatory structure
Also include primary lever, connected between primary lever and final stage lever by connecting rod, the power of the toppling loading component is located at primary
On the input of lever.
3. the bearing static properties experimental rig according to claim 1, it is characterised in that the power of the toppling loading component
For the power loading counterweight that topples.
4. bearing static properties experimental rig according to claim 3, it is characterised in that the power of the toppling loading counterweight edge
The length direction of primary lever is movably assemblied on primary lever.
5. the bearing static properties experimental rig according to claim 1, it is characterised in that axial force load maintainer includes
The axial force loading component supported by the power transmission arm.
6. the bearing static properties experimental rig according to claim 1, it is characterised in that the end of the inner ring construction section
Portion is provided with the inner ring pressing plate for precompressed bearing inner race, and inner ring pressing plate and mandrel pass through the pilot hole and guiding that are divided on the two
Post guide-localization coordinates.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201510274137.0A CN104897401B (en) | 2015-05-26 | 2015-05-26 | Bearing static properties experimental rig |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510274137.0A CN104897401B (en) | 2015-05-26 | 2015-05-26 | Bearing static properties experimental rig |
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| CN104897401A CN104897401A (en) | 2015-09-09 |
| CN104897401B true CN104897401B (en) | 2017-10-31 |
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Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN106769045B (en) * | 2017-01-06 | 2019-05-31 | 洛阳轴承研究所有限公司 | A kind of RV retarder base bearing performance testing device |
| CN107860570B (en) * | 2017-10-31 | 2019-11-08 | 华中科技大学无锡研究院 | A kind of industrial robot stiffness measurement loading device and measurement method |
| 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 |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2225676Y (en) * | 1995-04-26 | 1996-04-24 | 张祖明 | On line measuring tester for sliding thrust bearing accelerating abrasion |
| JP2009103652A (en) * | 2007-10-25 | 2009-05-14 | Ntn Corp | Testing apparatus for vehicle bearing |
| CN203869867U (en) * | 2013-11-21 | 2014-10-08 | 洛阳Lyc轴承有限公司 | Bearing test loading device having upsetting moment function |
| CN204128819U (en) * | 2014-08-18 | 2015-01-28 | 石家庄金士顿轴承科技有限公司 | A kind of paillon foil formula dynamic pressure thrust gas bearing Static stiffness measurement mechanism |
| CN104296993B (en) * | 2014-09-25 | 2016-08-24 | 北京航空航天大学 | A kind of axial magnetic suspension bearing static characteristic test device |
| CN204612930U (en) * | 2015-05-26 | 2015-09-02 | 河南科技大学 | A kind of bearing static properties test unit |
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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 |