CN109029811A - A kind of coupler force testing experiment method and calibration tooling - Google Patents

A kind of coupler force testing experiment method and calibration tooling Download PDF

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Publication number
CN109029811A
CN109029811A CN201810783320.7A CN201810783320A CN109029811A CN 109029811 A CN109029811 A CN 109029811A CN 201810783320 A CN201810783320 A CN 201810783320A CN 109029811 A CN109029811 A CN 109029811A
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CN
China
Prior art keywords
force
hitch
coupler
transition sleeve
application part
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Granted
Application number
CN201810783320.7A
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Chinese (zh)
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CN109029811B (en
Inventor
魏晓斌
杨奇科
伍道乐
雷新红
李继贤
熊晨彩
陈兆玲
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CRRC Zhuzhou Locomotive Co Ltd
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CRRC Zhuzhou Locomotive Co Ltd
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Priority to CN201810783320.7A priority Critical patent/CN109029811B/en
Publication of CN109029811A publication Critical patent/CN109029811A/en
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    • 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
    • G01L5/0061Force sensors associated with industrial machines or actuators
    • 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

Abstract

The invention discloses a kind of coupler force test calibration toolings, including platform, the force application part and the counter-force component opposite with force application part for providing pulling force and pressure are fixed on platform, force application part acts on force snesor, for connecting hitch transition sleeve to be calibrated between force snesor and counter-force component, so that the active force of force application part is applied to hitch transition sleeve by force snesor.The invention also discloses a kind of coupler force testing experiment method, hitch transition sleeve is installed on as in above-mentioned coupler force test calibration tooling, and in hitch transition sleeve surface layout foil gauge;It demarcates and verifies, force application part provides pulling force and pressure respectively, is respectively compared the output result of force snesor and the output result of foil gauge;After verifying is qualified, on-line testing is carried out.The coupler force test calibration tooling provides reliability basis for coupler force test, which can realize on-line testing, understands system-wide section hitch force-bearing situation, provides foundation for hitch optimization design, life appraisal etc..

Description

A kind of coupler force testing experiment method and calibration tooling
Technical field
The present invention relates to rail traffic vehicles technical field, more specifically to a kind of coupler force testing experiment method, Further relate to a kind of coupler force test calibration tooling.
Background technique
The fast development of domestic rail traffic, subway and emu vehicle ownership are more and more.Hitch is rail traffic The important component of vehicle refers to the hook of railway carriage or locomotive both ends, there is connection, traction and buffering.For realizing machine Company between vehicle and vehicle or vehicle and vehicle hangs, and transmits tractive force and impact force, and makes to keep certain distance between vehicle Vehicle part.
For hitch as the force transferring part between vehicle, reliability is related to vehicle operational safety.Route, load, speed etc. are no There are Different Effects with to hitch.Hitch performance is assessed, selection ground is provided for design, understands hitch force-bearing situation in practice Just it is particularly important.However, having no effective means at present carries out coupler force test.
Summary of the invention
In view of this, the first purpose of this invention is to provide a kind of coupler force test calibration tooling, which is surveyed The structure design that tooling is determined in test-object can efficiently solve coupler force and be difficult to the problem of testing, and second object of the present invention is to mention For a kind of coupler force testing experiment method.
In order to reach above-mentioned first purpose, the invention provides the following technical scheme:
A kind of coupler force test calibration tooling, including platform are fixed on the platform for providing pulling force and pressure Force application part and the counter-force component opposite with the force application part, the force application part act on force snesor, the power sensing For connecting hitch transition sleeve to be calibrated between device and the counter-force component, so that the active force of the force application part passes through institute It states force snesor and is applied to the hitch transition sleeve.
Preferably, in above-mentioned coupler force test calibration tooling, the force application part includes telescoping cylinder, the work of the telescoping cylinder Moved end acts on the force snesor.
Preferably, in above-mentioned coupler force test calibration tooling, the force application part further include load frame, the load frame and The force snesor is fixedly connected, and is provided with the telescoping cylinder among the load frame, the both ends of the telescoping cylinder all have work Stopper rod is simultaneously respectively acting on the load frame, and the telescopic direction of the telescoping cylinder is conllinear with the force snesor.
Preferably, in above-mentioned coupler force test calibration tooling, the telescoping cylinder is removably fixedly connected with the platform.
Preferably, in above-mentioned coupler force test calibration tooling, the counter-force component includes being fixedly connected with the platform Reaction frame is fixed with pedestal towards one end of the force application part on the reaction frame.
Preferably, in above-mentioned coupler force test calibration tooling, the both ends of the hitch transition sleeve respectively by with entrucking part The consistent snap ring of structure is fixedly connected with terminal pad, positioned at hitch transition sleeve both ends the terminal pad respectively with the power Sensor is fixedly connected with the pedestal.
Preferably, in above-mentioned coupler force test calibration tooling, the reaction frame is removably fixedly connected with the pedestal, The reaction frame is removably fixedly connected with the platform.
Coupler force test calibration tooling provided by the invention includes platform, force application part, counter-force component and force snesor.Its In, force application part and counter-force component are relatively fixed on platform, and force application part is made for providing pulling force and pressure, force application part For force snesor, for connecting hitch transition sleeve to be calibrated between force snesor and counter-force component, and then force application part Active force is applied to hitch transition sleeve by force snesor.
Using coupler force test calibration tooling provided by the invention, easy-disassembling-assembling hitch transition sleeve is chosen as dynamometry portion Part is installed between force snesor and counter-force component and is demarcated.Force application part applies pulling force or pressure to hitch transition sleeve Power, and by the pulling force of force snesor feedback load or the size of pressure, thus with the foil gauge that is pasted on hitch transition sleeve Output be compared, complete calibration, with guarantee subsequently through foil gauge to hitch transition sleeve detect with reflect coupler force test Reliability.To sum up, hitch transition sleeve is demarcated by the calibration tooling, provides reliability base for coupler force test Plinth.
In order to reach above-mentioned second purpose, the present invention also provides following technical solutions:
Hitch transition sleeve is installed on such as above-mentioned any coupler force test calibration work by a kind of coupler force testing experiment method It loads onto, and in the hitch transition sleeve surface layout foil gauge;
It demarcates and verifies, the force application part provides pulling force and pressure respectively, is respectively compared the output of the force snesor As a result with the output result of the foil gauge;
After verifying is qualified, on-line testing is carried out.
Using coupler force testing experiment method provided by the invention, carried out by pasting foil gauge on hitch transition sleeve Line test, can not destroy hitch installation condition, not damage hitch, at the same can be convenient after the test for completing a train into Row is dismantled and is used for the test of subsequent vehicle.This method is demarcated and is tested by using above-mentioned coupler force test calibration tooling Card, it is ensured that the reliability of method.Realize on-line testing, it will be appreciated that system-wide section hitch force-bearing situation, it is more targeted to be Hitch type selecting, optimization design, hitch life appraisal provide foundation.
It is preferably, described in the hitch transition sleeve surface layout foil gauge in above-mentioned vehicle coupler force testing experiment method, It specifically includes:
Full-bridge is formed in the hitch transition sleeve surface layout foil gauge.
Preferably, described in the hitch transition sleeve surface layout foil gauge in above-mentioned vehicle coupler force testing experiment method Before, further includes:
It polishes on hitch transition sleeve surface.
Detailed description of the invention
In order to more clearly explain the embodiment of the invention or the technical proposal in the existing technology, to embodiment or will show below There is attached drawing needed in technical description to be briefly described, it should be apparent that, the accompanying drawings in the following description is only this Some embodiments of invention for those of ordinary skill in the art without creative efforts, can be with It obtains other drawings based on these drawings.
Fig. 1 is the structural schematic diagram of the coupler force test calibration tooling of a specific embodiment of the invention;
Fig. 2 is the overlooking structure diagram of Fig. 1.
It is marked in attached drawing as follows:
1, platform, 2, reaction frame, 3, pedestal, 4, terminal pad, 5, hitch transition sleeve, 6, snap ring, 7, force snesor, 8, sensing Device connecting stud, 9, load frame, 10, telescoping cylinder.
Specific embodiment
The embodiment of the invention discloses a kind of coupler force testing experiment method and coupler force test calibration toolings, with effectively right Coupler force is tested.
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.
Fig. 1-Fig. 2 is please referred to, Fig. 1 is the structural representation of the coupler force test calibration tooling of a specific embodiment of the invention Figure, Fig. 2 are the overlooking structure diagram of Fig. 1.
In a specific embodiment, coupler force test calibration tooling provided by the invention include platform 1, force application part, Counter-force component and force snesor 7.
Wherein, platform 1 is used to support force application part and counter-force component, can specifically use cast iron platform 1 or other machines The structure that tool performance is met the requirements, is not especially limited herein.
Force application part and counter-force component are relatively fixed on platform 1, and force application part is for providing pulling force and pressure, counter-force Component is used to support hitch transition sleeve 5.The two is oppositely arranged, that is, positioned opposite along the direction of pulling force or pressure.
Force application part acts on force snesor 7, for connecting hitch mistake to be calibrated between force snesor 7 and counter-force component Set 5 is crossed, and then the active force of force application part is applied to hitch transition sleeve 5 by force snesor 7.When calibration, by hitch transition sleeve 5 It is installed between force snesor 7 and counter-force component, the active force of pulling force or pressure that force application part applies is acted on through force snesor 7 In one end of hitch transition sleeve 5, the other end of hitch transition sleeve 5 by counter-force component supporting role, to prevent it along active force Direction is mobile, limits its displacement to realize load.And force snesor 7 is able to detect the size of the active force of force application part application.
Using coupler force test calibration tooling provided by the invention, easy-disassembling-assembling hitch transition sleeve 5 is chosen as dynamometry Component is installed between force snesor 7 and counter-force component and is demarcated.Force application part applies pulling force to hitch transition sleeve 5 Or pressure, and by the pulling force of the feedback load of force snesor 7 or the size of pressure, thus with being pasted on hitch transition sleeve 5 The output of foil gauge is compared, and completes calibration, to guarantee to detect to reflect hitch hitch transition sleeve 5 subsequently through foil gauge The reliability of power test.To sum up, hitch transition sleeve 5 is demarcated by the calibration tooling, providing for coupler force test can By property basis.
Specifically, force application part includes telescoping cylinder 10, the movable end of telescoping cylinder 10 acts on force snesor 7.Counter-force component The side of 10 movable end of telescoping cylinder is set to along the telescopic direction of telescoping cylinder 10.Namely pass through telescoping cylinder 10 to force snesor 7 Apply pulling force or pressure, the pulling force or pressure is transferred to hitch transition sleeve 5 through force snesor 7, and detect by force snesor 7 The size of pulling force or pressure that telescoping cylinder 10 applies.Specific telescoping cylinder 10 can be hydraulic cylinder, such as oil cylinder.It as needed can also be with Using cylinder etc..Force application part uses telescoping cylinder 10, simple and reliable for structure, convenient for the application of pulling force and pressure.
Further, force application part further includes load frame 9, and load frame 9 is fixedly connected with force snesor 7, loads among frame 9 It is provided with telescoping cylinder 10, the both ends of telescoping cylinder 10 all have piston rod and are respectively acting on load frame 9, and telescoping cylinder 10 is flexible Direction and force snesor 7 are conllinear.Setting both ends all have the telescoping cylinder 10 of piston rod namely in load frame 9, and then flexible The piston rod at the both ends of cylinder 10 can distinguish overhanging or retraction to push load frame 9.As shown in Figure 1,10 left and right ends of telescoping cylinder Piston rod can be respectively acting on the inner left wall and right side inner wall of load frame 9, to apply pulling force or pressure to load frame 9. Since load frame 9 is connect with force snesor 7, so that the pressure or pressure are transferred to force snesor 7, to hitch transition sleeve 5 Apply active force.The structure of specific load frame 9 can be rectangular frame, be sheathed on outside telescoping cylinder 10, and the work with telescoping cylinder 10 Stopper rod cooperation, such as connect with piston rod by grafting mode.Sensing can specifically be passed through between force snesor 7 and load frame 9 Device connecting stud 8 is fixedly connected.
Further, telescoping cylinder 10 is removably fixedly connected with platform 1.It can specifically be bolted, or It can also be connected by other conventional connection types that are detachably fixed.Using removably mode is fixedly connected with, convenient for stretching It is repaired or replaced when contracting 10 failure of cylinder.Preferably, telescoping cylinder 10 on the platform 1 can along the link position of telescopic direction It adjusts.The link position of telescoping cylinder 10 namely as shown in Figure 1 on the platform 1 on left and right directions is adjustable, specifically can be in platform 1 The upper multiple interconnecting pieces of setting, such as bolt hole, and then telescoping cylinder 10 is optionally removably solid by different bolts hole and platform 1 Fixed connection.So set, convenient for according to the position of the length adjustment telescoping cylinder 10 of hitch transition sleeve 5, in order to by different size Hitch transition sleeve 5 be installed between force snesor 7 and counter-force component and demarcated.
In the above embodiments, counter-force component includes the reaction frame 2 being fixedly connected with platform 1, and direction is applied on reaction frame 2 One end of power component is fixed with pedestal 3.Preferably, counter-force component is removably fixedly connected with platform 1, can specifically pass through spiral shell It tethers and connects, or can also be connected by other conventional connection types that are detachably fixed.Using dismountable side of being fixedly connected Formula, convenient for it is repaired or replaced in 2 failure of reaction frame.Preferably, reaction frame 2 is on the platform 1 along force application part The link position of force direction is adjustable.Reaction frame 2 namely as shown in Figure 1 connection position on left and right directions on the platform 1 It sets adjustable, multiple interconnecting pieces, such as bolt hole can be specifically set on the platform 1, and then reaction frame 2 optionally passes through different spiral shells Keyhole is removably fixedly connected with platform 1.So set, convenient for according to the position of the length adjustment reaction frame 2 of hitch transition sleeve 5 It sets.Reaction frame 2 is fixed with pedestal 3 towards one end of force application part, that is, left end as shown in Figure 1, passes through the setting of pedestal 3 Convenient for fixed hitch transition sleeve 5.The specific structure of pedestal 3 can be correspondingly arranged according to the structure of 5 one end of hitch transition sleeve, in order to Be fixed installation, is not especially limited herein.
Reaction frame 2 can specifically include support plate, be respectively fixedly connected with reinforcing rib along the two sides of active force in support plate Plate, the bottom end of stiffener plate are fixedly connected with platform 1 respectively.
Further, the both ends of hitch transition sleeve 5 are respectively by solid with the consistent snap ring 6 of entrucking part structure and terminal pad 4 Fixed connection, the terminal pad 4 positioned at 5 both ends of hitch transition sleeve are fixedly connected with force snesor 7 and pedestal 3 respectively.Namely hitch The both ends of transition sleeve 5 are respectively arranged with terminal pad 4, and the shape of terminal pad 4 is correspondingly arranged according to 5 both ends shape of hitch transition sleeve, 5 both ends of hitch transition sleeve are individually fixed in terminal pad 4 by snap ring 6.Positioned at both ends terminal pad 4 further respectively with Force snesor 7 is fixedly connected with pedestal 3.Specific snap ring 6 and 4 shape of terminal pad are consistent with entrucking part structure.By snap ring 6 and even The setting of disk 4 is connect, convenient for the fixed installation of hitch transition sleeve 5.
Further, reaction frame 2 is removably fixedly connected with pedestal 3, can be specifically bolted, Huo Zheye It can be connected by other conventional connection types that are detachably fixed.Using removably mode is fixedly connected with, convenient in pedestal 3 It is repaired or replaced when failure.Preferably, the link position of the short transverse on reaction frame 2 of pedestal 3 is adjustable.Specifically may be used Multiple interconnecting pieces, such as bolt hole to be arranged on reaction frame 2, and then pedestal 3 optionally passes through different bolt hole and reaction frame 2 Removably it is fixedly connected.So set, convenient for adjusting the position of pedestal 3 according to the height of hitch transition sleeve 5.
The present invention also provides a kind of coupler force testing experiment methods.
In a specific embodiment, the present invention also provides coupler force testing experiment method the following steps are included:
S1: hitch transition sleeve 5 is installed on as in above-mentioned any coupler force test calibration tooling, and in hitch transition sleeve 5 surface layout foil gauges;
Specific installation site please refers to the embodiment of above-mentioned coupler force test calibration tooling, and details are not described herein again.In vehicle 5 surface layout foil gauge of hook transition sleeve is specifically as follows and first polishes on 5 surface of hitch transition sleeve, then in hitch transition Cover 5 surface layout foil gauges.Arrange that foil gauge generally pastes foil gauge.
S2: demarcating and verifies, and force application part provides pulling force and pressure respectively, is respectively compared the output result of force snesor 7 With the output result of foil gauge;
Pulling force and pressure are successively namely applied to hitch transition sleeve 5 by force application part, and detected by force snesor 7 The size of input load reacts the size that output strains and is converted to stress by foil gauge, by comparing the defeated of force snesor 7 As a result, finding the relationship of input and output, judgement performance indexes is completed calibration and is tested for the output of result and foil gauge out Card.
S3: after verifying is qualified, on-line testing is carried out.
When being specifically as follows the error for exporting result and input results within the scope of kinematic error, then assert that verifying is qualified. Foil gauge is arranged on the hitch transition sleeve 5 of vehicle using above-mentioned foil gauge arrangement, this is pasted with the hitch of foil gauge Transition sleeve 5 is installed on vehicle, and on-line testing is carried out in vehicle operation.
Using coupler force testing experiment method provided by the invention, carried out by pasting foil gauge on hitch transition sleeve 5 On-line testing can not destroy hitch installation condition, not damage hitch, while can be convenient after the test for completing a train Dismantle and be used for the test of subsequent vehicle.This method by using above-mentioned coupler force test calibration tooling carry out calibration and Verifying, it is ensured that the reliability of method.Realize on-line testing, it will be appreciated that system-wide section hitch force-bearing situation, it is more targeted Foundation is provided for hitch type selecting, optimization design, hitch life appraisal.
Specifically, being specifically included in 5 surface layout foil gauge of hitch transition sleeve:
Full-bridge is formed in 5 surface layout foil gauge of hitch transition sleeve.By choosing suitable location arrangements foil gauge composition Full-bridge can effectively eliminate due to the influence caused by hitch bending to pressure test.It specific steps position can be according to hitch Shape to corresponding setting, be not especially limited herein.
Each embodiment in this specification is described in a progressive manner, the highlights of each of the examples are with other The difference of embodiment, the same or similar parts in each embodiment may refer to each other.
The foregoing description of the disclosed embodiments enables those skilled in the art to implement or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, as defined herein General Principle can be realized in other embodiments without departing from the spirit or scope of the present invention.Therefore, of the invention It is not intended to be limited to the embodiments shown herein, and is to fit to and the principles and novel features disclosed herein phase one The widest scope of cause.

Claims (10)

1. a kind of coupler force test calibration tooling, which is characterized in that including platform, be fixed on the platform for providing pulling force With the force application part of pressure and the counter-force component opposite with the force application part, the force application part acts on force snesor, institute It states for connecting hitch transition sleeve to be calibrated between force snesor and the counter-force component, so that the effect of the force application part Power is applied to the hitch transition sleeve by the force snesor.
2. coupler force test calibration tooling according to claim 1, which is characterized in that the force application part includes flexible Cylinder, the movable end of the telescoping cylinder act on the force snesor.
3. coupler force test calibration tooling according to claim 2, which is characterized in that the force application part further includes load Frame, the load frame are fixedly connected with the force snesor, are provided with the telescoping cylinder, the telescoping cylinder among the load frame Both ends all have piston rod and be respectively acting on the load frame, and the telescopic direction of the telescoping cylinder and the force snesor Collinearly.
4. coupler force test calibration tooling according to claim 3, which is characterized in that the telescoping cylinder and the platform can Disassembly is fixedly connected.
5. coupler force test calibration tooling according to claim 1-4, which is characterized in that the counter-force component packet It includes the reaction frame being fixedly connected with the platform, is fixed with pedestal towards one end of the force application part on the reaction frame.
6. coupler force test calibration tooling according to claim 5, which is characterized in that the both ends of the hitch transition sleeve point Not by being fixedly connected with the consistent snap ring of entrucking part structure and terminal pad, the connection positioned at hitch transition sleeve both ends Disk is fixedly connected with the force snesor and the pedestal respectively.
7. coupler force test calibration tooling according to claim 5, which is characterized in that the reaction frame and the pedestal can Disassembly is fixedly connected, and the reaction frame is removably fixedly connected with the platform.
8. a kind of coupler force testing experiment method characterized by comprising
Hitch transition sleeve is installed on as in the described in any item coupler force test calibration toolings of claim 1-7, and described Hitch transition sleeve surface layout foil gauge;
It demarcates and verifies, the force application part provides pulling force and pressure respectively, is respectively compared the output result of the force snesor With the output result of the foil gauge;
After verifying is qualified, on-line testing is carried out.
9. coupler force testing experiment method according to claim 8, which is characterized in that described in the hitch transition sleeve table Foil gauge is arranged in face, is specifically included:
Full-bridge is formed in the hitch transition sleeve surface layout foil gauge.
10. coupler force testing experiment method according to claim 8, which is characterized in that described in the hitch transition sleeve Before surface layout foil gauge, further includes:
It polishes on hitch transition sleeve surface.
CN201810783320.7A 2018-07-17 2018-07-17 Car coupler force test method and calibration tool Active CN109029811B (en)

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CN109738142A (en) * 2019-01-02 2019-05-10 中车青岛四方机车车辆股份有限公司 Vehicle body of railway vehicle pilot test of static strength device
CN110307933A (en) * 2019-07-16 2019-10-08 西南交通大学 A kind of railway vehicle coupler power static demarcating testing stand
CN110411653A (en) * 2019-07-16 2019-11-05 西南交通大学 A kind of railway vehicle coupler power static demarcating method
CN110595805A (en) * 2019-10-18 2019-12-20 资阳中车电气科技有限公司 Standard electric coupler service life test bed for motor train unit
CN110686880A (en) * 2019-10-25 2020-01-14 宁海县宏瑞汽车部件有限公司 Towing hook strength detection equipment
CN110793603A (en) * 2019-10-31 2020-02-14 中南大学 Combined bridge type coupler multi-element multi-directional load measuring system and decoupling method
CN111896250A (en) * 2020-07-24 2020-11-06 东风商用车有限公司 Flexible shaft ball joint with pull pressure sensor and variable speed control test system
CN112179764A (en) * 2019-07-05 2021-01-05 中车长春轨道客车股份有限公司 Loading device for coupler tension-compression integrated test
CN113504042A (en) * 2021-07-22 2021-10-15 中国北方车辆研究所 Calibration tool and calibration method for parts with spherical hinge rods at two ends
CN114323935A (en) * 2021-11-25 2022-04-12 中国国检测试控股集团股份有限公司 Tension and compression force application device
CN114324014A (en) * 2021-11-25 2022-04-12 中国国检测试控股集团股份有限公司 Anti-seismic performance test equipment
CN114486302A (en) * 2021-12-31 2022-05-13 大秦铁路股份有限公司科学技术研究所 Coupler force measuring method and system considering longitudinal loading additional bending moment
CN114486302B (en) * 2021-12-31 2024-02-23 大秦铁路股份有限公司科学技术研究所 Coupler force measurement method and system considering longitudinal loading additional bending moment

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Cited By (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109738142A (en) * 2019-01-02 2019-05-10 中车青岛四方机车车辆股份有限公司 Vehicle body of railway vehicle pilot test of static strength device
CN112179764A (en) * 2019-07-05 2021-01-05 中车长春轨道客车股份有限公司 Loading device for coupler tension-compression integrated test
CN110307933A (en) * 2019-07-16 2019-10-08 西南交通大学 A kind of railway vehicle coupler power static demarcating testing stand
CN110411653A (en) * 2019-07-16 2019-11-05 西南交通大学 A kind of railway vehicle coupler power static demarcating method
CN110595805A (en) * 2019-10-18 2019-12-20 资阳中车电气科技有限公司 Standard electric coupler service life test bed for motor train unit
CN110686880A (en) * 2019-10-25 2020-01-14 宁海县宏瑞汽车部件有限公司 Towing hook strength detection equipment
CN110793603A (en) * 2019-10-31 2020-02-14 中南大学 Combined bridge type coupler multi-element multi-directional load measuring system and decoupling method
CN111896250A (en) * 2020-07-24 2020-11-06 东风商用车有限公司 Flexible shaft ball joint with pull pressure sensor and variable speed control test system
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