CN108918146A - A kind of angular contact ball bearing preload force simulating device - Google Patents

A kind of angular contact ball bearing preload force simulating device Download PDF

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Publication number
CN108918146A
CN108918146A CN201811105161.1A CN201811105161A CN108918146A CN 108918146 A CN108918146 A CN 108918146A CN 201811105161 A CN201811105161 A CN 201811105161A CN 108918146 A CN108918146 A CN 108918146A
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CN
China
Prior art keywords
main body
rod
frame body
bearing
guide pad
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
CN201811105161.1A
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Chinese (zh)
Inventor
周华乙
吕龙升
全威
张敬忠
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Wafangdian Baoshan Bearing Manufacturing Co Ltd
Original Assignee
Wafangdian Baoshan Bearing Manufacturing Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Wafangdian Baoshan Bearing Manufacturing Co Ltd filed Critical Wafangdian Baoshan Bearing Manufacturing Co Ltd
Priority to CN201811105161.1A priority Critical patent/CN108918146A/en
Publication of CN108918146A publication Critical patent/CN108918146A/en
Pending legal-status Critical Current

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    • GPHYSICS
    • G01MEASURING; TESTING
    • G01MTESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
    • G01M13/00Testing of machine parts
    • G01M13/04Bearings
    • GPHYSICS
    • G01MEASURING; TESTING
    • G01LMEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
    • G01L5/00Apparatus for, or methods of, measuring force, work, mechanical power, or torque, specially adapted for specific purposes
    • G01L5/0009Force sensors associated with a bearing

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Chemical & Material Sciences (AREA)
  • Analytical Chemistry (AREA)
  • Toys (AREA)

Abstract

The invention discloses a kind of angular contact ball bearings to pre-tighten force simulating device, including the first electric telescopic rod, bearing outer ring, single-chip microcontroller and main body, the side of the body interior bottom end is equipped with single-chip microcontroller, and the other side of body interior bottom end is equipped with wireless signal transceiver module, the middle position of the body interior bottom end is provided with noise reduction shell, and the inside of noise reduction shell is equipped with driving motor, the top of the main body is equipped with frame body, and main body top middle position frame body is internally provided with mounting groove, the output end of the driving motor is connect by shaft with mounting groove, and the inside of mounting groove is equipped with drive rod.The present invention is by being equipped with frame body, main body, sliding block, sliding slot and fixing bolt, so that device is convenient for the height for adjusting frame body according to the demand of user to be conducive to the long-term popularization of the device to enhance the applicability of device.

Description

A kind of angular contact ball bearing preload force simulating device
Technical field
The present invention relates to angular contact ball bearing pretightning force analog machine technical field, specially a kind of angular contact ball bearing is pre- Clamp force simulator.
Background technique
Angular contact ball bearing needs to pre-tighten bearing when assembling, and suitable preload amount can obtain suitable preload Power, can improve service life and the precision of bearing, and preload makes first to bearing in the case where no external applied load between raceway and rolling element Applying load is superimposed the load of bearing when there is external applied load to exist, to improve the rigidity of bearing, angular contact ball bearing is being installed The mainly angular contact ball bearing, capacity eccentric bearing, tapered roller bearing, taper hole double-row cylindrical roller of preload amount are controlled in the process Deng in the final stage that this several class bearing is installed, seeking to relatively accurately adjust clearance, i.e. control preload amount, especially to lathe Main shaft etc. has the shafting of strict demand to running accuracy, noise, temperature rise, and the adjustment trip of preload amount is not only controlled in first installation Gap, and be also required to adjust in use, in order to understand the effect of this pretightning force, it would be desirable to design a kind of angular contact ball Bearing pre-tightened force simulating device.
However existing angular contact ball bearing pre-tightens force simulating device or generally existing some either large or small on the market Defect cannot meet the needs of people are growing well, be similar to, and traditional angular contact ball bearing pre-tightens force simulating device The problem of simple, not easy to disassemble and splicing that often there is structures, this causes the using effect of device bad, meanwhile, it is existing Angular contact ball bearing pre-tightens drawback of the force simulating device also in the prevalence of structural stability difference, this causes the practicability of device low Under, in addition, existing angular contact ball bearing pre-tightens force simulating device usually will appear noise jamming in use, this influence The observation of experimental data, for these problems, we have proposed a kind of novel angular contact ball bearings to pre-tighten force simulating device, The demand in market is preferably catered to, for people provides better usage experience.
Summary of the invention
The purpose of the present invention is to provide a kind of angular contact ball bearings to pre-tighten force simulating device, to solve above-mentioned background technique The problem of middle proposition not easy to disassemble and splicing, structural stability difference and noise jamming.
To achieve the above object, the present invention provides the following technical solutions:A kind of angular contact ball bearing preload force simulating device, Including the first electric telescopic rod, bearing outer ring, single-chip microcontroller and main body, the side of the body interior bottom end is equipped with single-chip microcontroller, And the other side of body interior bottom end is equipped with wireless signal transceiver module, the middle position setting of the body interior bottom end There is noise reduction shell, and the inside of noise reduction shell is equipped with driving motor, the top of the main body is equipped with frame body, and among main body top Frame body is internally provided with mounting groove at position, and the output end of the driving motor is connect by shaft with mounting groove, and installation The inside of slot is equipped with drive rod, and the top of the drive rod is equipped with bearing inner race, and axis is provided on the outside of bearing inner race Bearing outer-ring is evenly arranged with ball, and all installs on the frame body at bearing outer ring both ends between the bearing outer ring and bearing inner race There is the first electric telescopic rod, first electric telescopic rod is provided with arc rubber fixing piece, institute close to one end of bearing outer ring The middle position for stating frame body inner tip is provided with force application rod, and the inside of force application rod bottom end bearing inner race is equipped with the second electricity Dynamic telescopic rod, second electric telescopic rod are equipped with pressure sensor far from one end of force application rod, the bearing inner race it is outer Side wall is equipped with temperature sensor, and the second guide pad, and the second guide pad are provided on the force application rod above the bearing inner race Both ends be all provided with the second guide rod connecting with frame body, be provided with first on the force application rod above second guide pad and lead To block, and the both ends of the first guide pad are all provided with the first guide rod connecting with frame body, and the pressure sensor and temperature pass The output end of sensor all passes through conducting wire and the input terminal of single-chip microcontroller is electrically connected, and the output end of single-chip microcontroller is by conducting wire and wirelessly The input terminal of signal transmitting and receiving module is electrically connected, and the output end of the single-chip microcontroller passes through conducting wire and the first electric telescopic rod, second The input terminal of electric telescopic rod and driving motor is electrically connected.
Preferably, first guide pad and the second guide pad are all in hollow structure, and the interior diameter of the first guide pad is big In the interior diameter of the second guide pad.
Preferably, the lateral wall on the drive rod top is evenly arranged with the spring in concentric arrays, and spring is separate One end of drive rod is provided with fixture block, and the longitudinal section of the fixture block is trapezoidal, and the inner sidewall of bearing inner race is provided with and fixture block The card slot of cooperation constitutes snap-in structure between the drive rod and bearing inner race.
Preferably, the lateral wall of the drive rod bottom end is provided with external screw thread, and the inner sidewall of mounting groove is provided with and outer spiral shell The internal screw thread that line matches, and constitute and be threadedly coupled between drive rod and mounting groove.
Preferably, the frame body is all provided with sliding block close to the both ends of body side, and main body wall is internally provided with With the sliding slot of sliding block cooperation, the sliding block is internally provided with the fixing bolt connecting with main body, and leads between frame body and main body It crosses sliding block and sliding slot constitutes slide construction.
Preferably, being integrally formed welding structure between the noise reduction shell and main body, and four corners of main body bottom end It is all provided with sucker, the inner sidewall of the noise reduction shell is evenly arranged with the bloop in honeycomb arrangement, and the inside of bloop It is packed with sound-absorbing mineral wool.
Compared with prior art, the beneficial effects of the invention are as follows:The angular contact ball bearing pre-tightens force simulating device and passes through peace Equipped with fixture block, card slot, spring, drive rod and mounting groove, so that the device is integrally convenient for disassembling and installing, to optimize The structure of device is conducive to the long-term popularization of the device, the device by being provided with the first guide pad and the second guide pad so that The device plays preferable guide and limit function to force application rod, so that it be made to be not easy sideslip in force, improves device Using effect, the device consolidate so that device is integrally convenient for placing in desktop by being provided with sucker, enhance the wind resistance of device Performance, meanwhile, the device by being equipped with pressure sensor, temperature sensor, single-chip microcontroller and wireless signal transceiver module so that Device is convenient for passing through the power of application and the temperature experienced into the effect of single-chip microcontroller and wireless signal transceiver module, user's It is shown on the background terminals such as mobile phone or computer, so that the experimental data of device is more intuitively changed, the device is logical It crosses and frame body, main body, sliding block, sliding slot and fixing bolt is installed, so that device is convenient for adjusting frame body according to the demand of user Height be conducive to the long-term popularization of the device to enhance the applicability of device.
Detailed description of the invention
Fig. 1 is that the present invention faces the schematic diagram of the section structure;
Fig. 2 is enlarged structure schematic diagram at A in Fig. 1 of the present invention;
Fig. 3 is enlarged structure schematic diagram at B in Fig. 1 of the present invention;
Fig. 4 is enlarged structure schematic diagram at C in Fig. 1 of the present invention;
Fig. 5 is present system block diagram.
In figure:1, the first electric telescopic rod;2, the first guide rod;3, the first guide pad;4, force application rod;5, the second guiding Block;6, the second guide rod;7, bearing outer ring;8, arc rubber fixing piece;9, ball;10, mounting groove;11, sucker;12, wireless Signal transmitting and receiving module;13, single-chip microcontroller;14, drive rod;15, bearing inner race;16, pressure sensor;17, the second electric telescopic rod; 18, spring;19, fixture block;20, card slot;21, temperature sensor;22, sliding slot;23, fixing bolt;24, sliding block;25, frame body;26, Driving motor;27, sound-absorbing mineral wool;28, main body;29, noise reduction shell;30, bloop.
Specific embodiment
Following will be combined with the drawings in the embodiments of the present invention, and technical solution in the embodiment of the present invention carries out clear, complete Site preparation description, it is clear that described embodiments are only a part of the embodiments of the present invention, instead of all the embodiments.It is based on Embodiment in the present invention, it is obtained by those of ordinary skill in the art without making creative efforts every other Embodiment shall fall within the protection scope of the present invention.
Please refer to Fig. 1-5, a kind of embodiment provided by the invention:A kind of angular contact ball bearing preload force simulating device, packet The first electric telescopic rod 1, bearing outer ring 7, single-chip microcontroller 13 and main body 28 are included, the side of 28 inner bottom of main body is equipped with single-chip microcontroller 13, and the other side of 28 inner bottom of main body is equipped with wireless signal transceiver module 12, the middle position of 28 inner bottom of main body Place is provided with noise reduction shell 29, and the inside of noise reduction shell 29 is equipped with driving motor 26, constitutes one between noise reduction shell 29 and main body 28 Body welding structure, and four corners of 28 bottom end of main body are all provided with sucker 11, the inner sidewall of noise reduction shell 29 is uniformly arranged There is the bloop 30 in honeycomb arrangement, and the inside of bloop 30 is packed with sound-absorbing mineral wool 27, makes which increase device noise reductions The performance of noise reduction improves accuracy when experimental data observation to alleviate noise jamming caused by device itself, main The top of body 28 is equipped with frame body 25, and 28 top middle position frame body 25 of main body is internally provided with mounting groove 10, frame body 25 are all provided with sliding block 24, and the cunning of 28 side wall of main body being internally provided with the cooperation of sliding block 24 close to the both ends of 28 side of main body Slot 22, sliding block 24 is internally provided with the fixing bolt 23 connecting with main body 28, and passes through sliding block between frame body 25 and main body 28 24 and sliding slot 22 constitute slide construction, make it easy to staff adjust frame body 25 height, thus enhance device be applicable in Property, the output end of driving motor 26 is connect by shaft with mounting groove 10, and the inside of mounting groove 10 is equipped with drive rod 14, is driven The lateral wall of 14 bottom end of lever is provided with external screw thread, and the inner sidewall of mounting groove 10 is provided with the internal screw thread matched with external screw thread, And constitute and be threadedly coupled between drive rod 14 and mounting groove 10, making it easy to staff will be between drive rod 14 and mounting groove 10 It is disassembled and installed, to optimize the structure of device, the top of drive rod 14 is equipped with bearing inner race 15, and bearing inner race 15 outside is provided with bearing outer ring 7, and ball 9, and bearing outer ring 7 are evenly arranged between bearing outer ring 7 and bearing inner race 15 First electric telescopic rod 1 is all installed, the lateral wall on 14 top of drive rod is evenly arranged in concentric circles on the frame body 25 at both ends The spring 18 of arrangement, and spring 18 is provided with fixture block 19 far from one end of drive rod 14, the longitudinal section of fixture block 19 is trapezoidal, and axis The inner sidewall for holding inner ring 15 is provided with the card slot 20 cooperated with fixture block 19, and engaging knot is constituted between drive rod 14 and bearing inner race 15 Structure, making it easy to user will disassemble and install between drive rod 14 and bearing inner race 15, to enhance the reality of device With property, the first electric telescopic rod 1 is provided with arc rubber fixing piece 8 close to one end of bearing outer ring 7,25 inner tip of frame body Middle position is provided with force application rod 4, and the inside of 4 bottom end bearing inner race 15 of force application rod is equipped with the second electric telescopic rod 17, Second electric telescopic rod 17 is equipped with pressure sensor 16 far from one end of force application rod 4, and the lateral wall of bearing inner race 15 is equipped with Temperature sensor 21 is provided with the second guide pad 5 on the force application rod 4 of the top of bearing inner race 15, and the both ends of the second guide pad 5 are all It is provided with the second guide rod 6 connecting with frame body 25, is provided with the first guide pad 3 on the force application rod 4 of 5 top of the second guide pad, And first the both ends of guide pad 3 be all provided with the first guide rod 2 connecting with frame body 25, the first guide pad 3 and the second guide pad 5 It is all in hollow structure, and the interior diameter of the first guide pad 3 is greater than the interior diameter of the second guide pad 5, it is made to optimize the knot of device Structure improves the stationary performance of force application rod 4, so that the practicability of device is enhanced, pressure sensor 16 and temperature sensor 21 Output end all pass through the input terminal of conducting wire and single-chip microcontroller 13 and be electrically connected, and the output end of single-chip microcontroller 13 passes through conducting wire and wireless The input terminal of signal transmitting and receiving module 12 is electrically connected, and the output end of single-chip microcontroller 13 passes through conducting wire and the first electric telescopic rod 1, second The input terminal of electric telescopic rod 17 and driving motor 26 is electrically connected, and the model of first electric telescopic rod 1 can be GT-QD, should The model of second electric telescopic rod 17 can be HTA1500, and the model of the driving motor 26 can be Y355L1-2, which receives The model for sending out module 12 can be SRW1042, and the model of the single-chip microcontroller 13 can be HT66F018, and the model of the pressure sensor 16 can For CYYZ11, the model of the temperature sensor 21 can be CWDZ11.
Working principle:In use, device is being suitable for by external power supply, staff first with the effect of sucker 11 It operates desktop to place securely, to enhance the wind resistance of device, improves the using effect of device, then user can be with Using the mutually matched internal screw thread and external screw thread being arranged on drive rod 14 and mounting groove 10, by drive rod 14 and mounting groove 10 it Between be connected firmly, then user is arranged using the spring 18 and fixture block 19 and bearing inner race 15 of 14 top of drive rod setting The mating reaction of card slot 20 will connect between bearing inner race 15 and drive rod 14, and then it is electronic to can star first by user Telescopic rod 1 cooperates the effect of arc rubber fixing piece 8, bearing outer ring 7 is further fixed, and starts driving motor 26, Make it that bearing inner race 15 be driven to be rotated, realize the simulation of bearing movable, then user can utilize force application rod 4 and the Two electric telescopic rods 17 carry out the application of pretightning force, realize the simulation of pretightning force, generate when being moved by observation bearing inner race 15 Noise and the variation of temperature carry out the analyses of data, in this process, since the device is provided with the first guide pad 3 With the second guide pad 5 so that the device plays preferable guide and limit function to force application rod, so that it be made to be not easy in force Sideslip improves the using effect of device, in addition, the device is by being equipped with pressure sensor 16, temperature sensor 21, monolithic Machine 13 and wireless signal transceiver module 12, so that device is convenient for the power of application and the temperature experienced passing through single-chip microcontroller 13 and nothing The effect of line signal transmitting and receiving module 12 shows on the background terminals such as the mobile phone of user or computer, so that The experimental data of device is more intuitively changed.
It is obvious to a person skilled in the art that invention is not limited to the details of the above exemplary embodiments, Er Qie In the case where without departing substantially from spirit or essential attributes of the invention, the present invention can be realized in other specific forms.Therefore, no matter From the point of view of which point, the present embodiments are to be considered as illustrative and not restrictive, and the scope of the present invention is by appended power Benefit requires rather than above description limits, it is intended that all by what is fallen within the meaning and scope of the equivalent elements of the claims Variation is included within the present invention.Any reference signs in the claims should not be construed as limiting the involved claims.

Claims (6)

1. a kind of angular contact ball bearing pre-tightens force simulating device, including the first electric telescopic rod(1), bearing outer ring(7), single-chip microcontroller (13)And main body(28), it is characterised in that:The main body(28)The side of inner bottom is equipped with single-chip microcontroller(13), and main body (28)The other side of inner bottom is equipped with wireless signal transceiver module(12), the main body(28)The middle position of inner bottom Place is provided with noise reduction shell(29), and noise reduction shell(29)Inside driving motor is installed(26), the main body(28)Top peace Equipped with frame body(25), and main body(28)Top middle position frame body(25)Be internally provided with mounting groove(10), the driving Motor(26)Output end pass through shaft and mounting groove(10)Connection, and mounting groove(10)Inside drive rod is installed(14), The drive rod(14)Top bearing inner race is installed(15), and bearing inner race(15)Outside be provided with bearing outer ring(7), The bearing outer ring(7)And bearing inner race(15)Between be evenly arranged with ball(9), and bearing outer ring(7)The frame body at both ends (25)On the first electric telescopic rod is all installed(1), first electric telescopic rod(1)Close to bearing outer ring(7)One end set It is equipped with arc rubber fixing piece(8), the frame body(25)The middle position of inner tip is provided with force application rod(4), and exert a force Bar(4)Bottom end bearing inner race(15)Inside the second electric telescopic rod is installed(17), second electric telescopic rod(17)Far From force application rod(4)One end pressure sensor is installed(16), the bearing inner race(15)Lateral wall temperature sensing is installed Device(21), the bearing inner race(15)The force application rod of top(4)On be provided with the second guide pad(5), and the second guide pad(5)'s Both ends are all provided with and frame body(25)Second guide rod of connection(6), second guide pad(5)The force application rod of top(4)On It is provided with the first guide pad(3), and the first guide pad(3)Both ends be all provided with and frame body(25)First guide rod of connection (2), the pressure sensor(16)And temperature sensor(21)Output end all pass through conducting wire and single-chip microcontroller(13)Input terminal It is electrically connected, and single-chip microcontroller(13)Output end pass through conducting wire and wireless signal transceiver module(12)Input terminal be electrically connected, The single-chip microcontroller(13)Output end pass through conducting wire and the first electric telescopic rod(1), the second electric telescopic rod(17)With driving electricity Machine(26)Input terminal be electrically connected.
2. a kind of angular contact ball bearing according to claim 1 pre-tightens force simulating device, it is characterised in that:Described first leads To block(3)With the second guide pad(5)It is all in hollow structure, and the first guide pad(3)Interior diameter be greater than the second guide pad(5)'s Interior diameter.
3. a kind of angular contact ball bearing according to claim 1 pre-tightens force simulating device, it is characterised in that:The drive rod (14)The lateral wall on top is evenly arranged with the spring in concentric arrays(18), and spring(18)Far from drive rod(14)One End is provided with fixture block(19), the fixture block(19)Longitudinal section it is trapezoidal, and bearing inner race(15)Inner sidewall be provided with and block Block(19)The card slot of cooperation(20), the drive rod(14)And bearing inner race(15)Between constitute snap-in structure.
4. a kind of angular contact ball bearing according to claim 1 pre-tightens force simulating device, it is characterised in that:The drive rod (14)The lateral wall of bottom end is provided with external screw thread, mounting groove(10)Inner sidewall be provided with the internal screw thread matched with external screw thread, And drive rod(14)And mounting groove(10)Between constitute be threadedly coupled.
5. a kind of angular contact ball bearing according to claim 1 pre-tightens force simulating device, it is characterised in that:The frame body (25)Close to main body(28)The both ends of side are all provided with sliding block(24), and main body(28)Side wall be internally provided with and sliding block (24)The sliding slot of cooperation(22), the sliding block(24)Be internally provided with and main body(28)The fixing bolt of connection(23), and frame Body(25)And main body(28)Between pass through sliding block(24)And sliding slot(22)Constitute slide construction.
6. a kind of angular contact ball bearing according to claim 1 pre-tightens force simulating device, it is characterised in that:The noise reduction shell (29)With main body(28)Between being integrally formed welding structure, and main body(28)Four corners of bottom end are all provided with sucker (11), the noise reduction shell(29)Inner sidewall be evenly arranged with the bloop in honeycomb arrangement(30), and bloop(30)'s Inside is packed with sound-absorbing mineral wool(27).
CN201811105161.1A 2018-09-21 2018-09-21 A kind of angular contact ball bearing preload force simulating device Pending CN108918146A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201811105161.1A CN108918146A (en) 2018-09-21 2018-09-21 A kind of angular contact ball bearing preload force simulating device

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Application Number Priority Date Filing Date Title
CN201811105161.1A CN108918146A (en) 2018-09-21 2018-09-21 A kind of angular contact ball bearing preload force simulating device

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Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101419126A (en) * 2008-11-28 2009-04-29 东南大学 Fatigue life test stand for angular contact ball bearing
CN101852250A (en) * 2010-04-29 2010-10-06 中国科学院上海技术物理研究所 Device and method for regulating pair of back to back inner and outer spacers of angular contact bearing
CN101893512A (en) * 2010-07-05 2010-11-24 西安理工大学 Modularized static stiffness testing device for angular contact ball bearings
RU2010138027A (en) * 2010-09-13 2012-03-20 Федеральное государственное образовательное учреждение высшего профессионального образования "Ульяновская государственная сельскох DEVICE FOR CONTROL OF ACCURACY OF ROTATION OF ROLLING BEARING AT SIMULATION OF WORK TENSION
CN207050689U (en) * 2017-07-28 2018-02-27 中国第一汽车股份有限公司 Taper roll bearing assembles the measurement apparatus of height
CN208653802U (en) * 2018-09-21 2019-03-26 瓦房店宝山轴承制造有限公司 A kind of angular contact ball bearing preload force simulating device

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101419126A (en) * 2008-11-28 2009-04-29 东南大学 Fatigue life test stand for angular contact ball bearing
CN101852250A (en) * 2010-04-29 2010-10-06 中国科学院上海技术物理研究所 Device and method for regulating pair of back to back inner and outer spacers of angular contact bearing
CN101893512A (en) * 2010-07-05 2010-11-24 西安理工大学 Modularized static stiffness testing device for angular contact ball bearings
RU2010138027A (en) * 2010-09-13 2012-03-20 Федеральное государственное образовательное учреждение высшего профессионального образования "Ульяновская государственная сельскох DEVICE FOR CONTROL OF ACCURACY OF ROTATION OF ROLLING BEARING AT SIMULATION OF WORK TENSION
CN207050689U (en) * 2017-07-28 2018-02-27 中国第一汽车股份有限公司 Taper roll bearing assembles the measurement apparatus of height
CN208653802U (en) * 2018-09-21 2019-03-26 瓦房店宝山轴承制造有限公司 A kind of angular contact ball bearing preload force simulating device

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