CN207636420U - A kind of tooling of spring fatigue test - Google Patents
A kind of tooling of spring fatigue test Download PDFInfo
- Publication number
- CN207636420U CN207636420U CN201721680632.2U CN201721680632U CN207636420U CN 207636420 U CN207636420 U CN 207636420U CN 201721680632 U CN201721680632 U CN 201721680632U CN 207636420 U CN207636420 U CN 207636420U
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- positioning clamping
- tooling
- pressure head
- clamping fixture
- pedestal
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Abstract
The utility model belongs to pressure test tooling field, specifically discloses a kind of tooling of spring fatigue test, which includes：Plane pressure head, pedestal, pressing plate and positioning clamping fixture, plane pressure head are located at the top of pedestal and coaxial arrangement, and the vertically moving pressure providing device of driving plane pressure head is connected on plane pressure head；Radially direction reach out to and is provided with multiple rail bars the periphery of pedestal, and multiple positioning clamping fixtures are respectively arranged on each rail bar, and can respectively be slided along the length direction of corresponding rail bar to carry out position adjusting；Multiple pressing plates are corresponding with each positioning clamping fixture respectively and are removably fixed on plane pressure head, and corresponding pressing plate is matched with positioning clamping fixture to compress spring to be tested.The tooling can carry out testing fatigue to multiple springs simultaneously, improve testing efficiency.
Description
Technical field
The utility model is related to pressure test tooling fields, more particularly to the tooling of spring fatigue test.
Background technology
Most important component is exactly the fastener system between rail and sleeper in track structure, and rail fastening can not only delay
Impact failure of the train to track structure is solved, and can ensure reliably to couple between rail and sleeper, it is ensureing track
It plays an important role in terms of structural stability and reliability.Spring is the critical component in fastener system, and bullet can occurs in it
Property deformation to absorb the energy of rail vibration generation, while ensureing its buckle press.If fastening elastic rod occurs because of fatigue damage
Fracture, fastener system, which will lose, should have the function of withholding rail, it is possible to cause train to derail or topple, cause lives and properties
Heavy losses.Therefore, fatigue behaviour is the performance indicator of spring most critical.
In order to examine the fatigue behaviour of spring, need to carry out fatigue test to it using fatigue tester.At present it is known that
Spring fatigue tester can only carry out the fatigue test of single-piece spring,, can only when tested number increases under testing efficiency is very low
Increase number of devices to meet experiment demand, eventually leads to cost and the increase of personnel.
Utility model content
The purpose of this utility model is to provide a kind of tooling of spring fatigue test, which is institute in solution background technology
There are the problem of.
To achieve the goals above, the utility model provides a kind of tooling of spring fatigue test, which includes：It is flat
Face pressure head, pedestal, pressing plate and positioning clamping fixture, the plane pressure head are located at the top of the pedestal and coaxial arrangement, the plane
The pressure providing device for driving the plane pressure head vertically moving is connected on pressure head；The periphery of the pedestal is along its diameter
It reach out to direction and is provided with multiple rail bars, multiple positioning clamping fixtures is respectively arranged on each rail bar, and energy
It is enough respectively to be slided along the length direction of the corresponding rail bar to carry out position adjusting；Multiple pressing plates respectively with each institute
It is corresponding and be removably fixed on the plane pressure head to state positioning clamping fixture, the corresponding pressing plate and the positioning clamping fixture
It matches to compress spring to be tested.
Preferably, the bottom of the positioning clamping fixture is provided with the track slot to match with the rail bar, and the track slot is at least
Setting is parallel to the strip through-hole of the rail bar on one side wall, and institute is passed through with the positioning bolt that the strip through-hole matches
It states strip through-hole and is bolted in the position that the rail bar is located at the fixation positioning clamping fixture on the rail bar.
Preferably, the accommodating groove coaxial with the strip through-hole, the storage are provided on the outer wall of the positioning clamping fixture
The aperture of slot is more than the aperture of the strip through-hole.
Preferably, the top of the positioning clamping fixture is provided with positioning of the opening towards the U shapes of the axis direction of the pedestal
Slot, the upper arm lengths of the locating slot are less than the lower arm lengths of the locating slot.
Preferably, positioning strip is removably connected on the lower face of the upper arm, the bottom end of the positioning strip is close to institute
The axis side for stating pedestal is provided with the arc port to match with the spring to be tested；It is detachable on the upper surface of the underarm
Ground is connected with the cushion block parallel with the spring to be tested.
Preferably, the underarm is triangle or trapezoidal close to the horizontal cross-section of one end of the axis of the pedestal, and phase
Adjacent two underarm side walls adjacent close to one end of the axis of the pedestal are mutually parallel.
Preferably, the pressure surface of the plane pressure head is circle, and multiple pressing plates edges are parallel to the circular tangent line side
To being fixed in removably and equably the bottom end of the plane pressure head.
Preferably, the pressing plate includes link block and press strip, and the bottom end of the link block is provided with baltimore groove, the spill
The slot bottom of slot is provided with multiple bolts hole, and multiple bolts are bolted in the plane pressure head with by the connection across the bolt hole
Block is removably fixed in the plane pressure head；The both ends of the press strip are respectively arranged with counter sink, with the counter sink phase
The dormant bolt matched passes through the counter sink and is bolted in the link block so that the press strip is removably fixed in the company
Connect block.
Preferably, the both sides of at least one positioning clamping fixture have been respectively and fixedly connected with limiting plate, and the limiting plate is far from described
One end of positioning clamping fixture extends to the side of the pressing plate to limit the pressing plate transverse shifting.
Preferably, the limiting plate is steel plate.
According to above-mentioned technical proposal, plane pressure head described in the utility model is located at the top of the pedestal and coaxially sets
It sets, the pressure providing device for driving the plane pressure head vertically moving is connected on the plane pressure head；The pedestal
Periphery radially direction reach out to and is provided with multiple rail bars, multiple positioning clamping fixtures are respectively arranged at each described
On rail bar, and can respectively it be slided along the length direction of the corresponding rail bar to carry out position adjusting；Multiple pressing plates
It is corresponding with each positioning clamping fixture respectively and be removably fixed on the plane pressure head, the corresponding pressing plate with
The positioning clamping fixture is matched to compress spring to be tested.Pressure providing device therein and traditional fatigue test frock one
Sample can provide the device of pressure using any type in the prior art, when in use, can be according to spring to be tested
Relative position of the positioning clamping fixture on rail bar is adjusted in size specification, then multiple springs to be tested are respectively placed in it is each fixed
In the mould of position, plane pressure head is moved down finally by pressure providing device, until multiple pressing plates are waited for corresponding respectively
Can simultaneously multiple springs to be tested be carried out at the same time with the experiment of fatigue after test spring contact.
Other feature and advantage of the utility model will be described in detail in subsequent specific embodiment part.
Description of the drawings
Attached drawing is to be used to provide a further understanding of the present invention, an and part for constitution instruction, and following
Specific implementation mode be used to explain the utility model together, but do not constitute limitations of the present invention.In the accompanying drawings：
Fig. 1 is a kind of structural schematic diagram of preferred embodiment of tooling in the utility model；
Fig. 2 is a kind of structural schematic diagram of preferred embodiment of positioning clamping fixture in the utility model.
Reference sign
1 plane pressure head, 2 link block
3 press strip, 4 limiting plate
5 positioning clamping fixture, 6 positioning strip
7 cushion block, 8 rail bar
9 positioning bolt, 10 strip through-hole
11 accommodating groove, 12 track slot
13 springs to be tested
Specific implementation mode
Specific embodiment of the present utility model is described in detail below in conjunction with attached drawing.It should be understood that herein
Described specific implementation mode is only used for describing and explaining the present invention, and is not intended to limit the utility model.
In the present invention, in the absence of explanation to the contrary, " up and down, front and back inside and outside " etc. is included in term
In the noun of locality only represent orientation of the term under normal service condition, or be those skilled in the art understand that be commonly called as, and
It is not construed as the limitation to the term.
Referring to the tooling of spring fatigue test shown in Fig. 1-2, which includes：Plane pressure head 1, pedestal, pressing plate and fixed
Position mould 5, the plane pressure head 1 are located at the top of the pedestal and coaxial arrangement, and driving institute is connected on the plane pressure head 1
State the vertically moving pressure providing device of plane pressure head 1；Radially direction reach out to the periphery of the pedestal
Multiple rail bars 8 are provided with, multiple positioning clamping fixtures 5 are respectively arranged on each rail bar 8, and can be respectively along corresponding
The rail bar 8 length direction slide to carry out position adjusting；Multiple pressing plates respectively with each positioning clamping fixture 5
It is corresponding and be removably fixed on the plane pressure head 1, the corresponding pressing plate matched with the positioning clamping fixture 5 with
Spring 13 to be tested is compressed.
Through the implementation of the above technical solution, the plane pressure head 1 is located at top and the coaxial arrangement of the pedestal, described
The pressure providing device for driving the plane pressure head 1 vertically moving is connected on plane pressure head 1；The periphery of the pedestal
Radially direction, which reach out to, is provided with multiple rail bars 8, and multiple positioning clamping fixtures 5 are respectively arranged at each rail bar
On 8, and can respectively it be slided along the length direction of the corresponding rail bar 8 to carry out position adjusting；Multiple pressing plates point
It is not corresponding with each positioning clamping fixture 5 and be removably fixed on the plane pressure head 1, the corresponding pressing plate with
The positioning clamping fixture 5 is matched to compress spring 13 to be tested.Pressure providing device therein and traditional fatigue test work
Dress equally can provide the device of pressure using any type in the prior art, when in use, can be according to bullet to be tested
Relative position of the positioning clamping fixture 5 on rail bar 8 is adjusted in the size specification of item 13, then multiple springs 13 to be tested are distinguished
It is placed in each positioning clamping fixture 5, moves down plane pressure head 1 finally by pressure providing device, until multiple pressing plates are distinguished
Can simultaneously multiple springs 13 to be tested be carried out at the same time with the experiment of fatigue after being contacted with corresponding spring 13 to be tested.
In this embodiment, in order to realize that positioning clamping fixture 5 can carry out sliding positioning on rail bar 8, convenient for adjusting position
It sets, it is preferable that the bottom of the positioning clamping fixture 5 is provided with the track slot 12 to match with the rail bar 8, and the track slot 12 is at least
Setting is parallel to the strip through-hole 10 of the rail bar 8, the positioning bolt 9 to match with the strip through-hole 10 on one side wall
Across the strip through-hole 10 and it is bolted in the position that the rail bar 8 is located at the fixation positioning clamping fixture 5 on the rail bar 8.
In specific implementation, in order to the position of adjusting positioning clamping fixtures 5 more as possible, multiple and positioning spiral shell is provided on rail bar 8
9 matched threaded hole of bolt is screwed to the threaded hole of different location on rail bar 8 to carry out to positioning clamping fixture 5 by positioning bolt 9
Position is adjusted, so that the tooling carries out testing fatigue to the spring of different size.
In this embodiment, in order to which the screw cap end of positioning bolt 9 to be hidden into positioning clamping fixture 5, U.S. is not influenced
It sees and uses, it is preferable that be provided with the accommodating groove 11 coaxial with the strip through-hole 10, institute on the outer wall of the positioning clamping fixture 5
The aperture for stating accommodating groove 11 is more than the aperture of the strip through-hole 10.Positioning bolt 9 including the screw rod and nut that are fixedly connected with each other,
Nut can be that outer polygon may be inner polygon nut.
In this embodiment, spring 13 to be tested is located on positioning clamping fixture 5 in order to realize, it is preferable that institute
State positioning clamping fixture 5 top be provided with opening towards the pedestal axis direction U-shaped locating slot, the locating slot it is upper
Arm lengths are less than the lower arm lengths of the locating slot.In use, spring 13 to be tested is placed in parallel with locating slot, wherein to be measured
The upper portion of examination spring 13 resists the upper arm of locating slot, and the lower portion of spring 13 to be tested resists the underarm of locating slot.On
What arm played is positioning action, prevents spring 13 to be tested from skidding and pops up, and what underarm played the role of is that support squeezes, to complete
The test job of spring 13 to be tested.
In this embodiment, spring 13 to be tested is located on positioning clamping fixture 5 in order to further realize, it is preferable that
Removably it is connected with positioning strip 6 on the lower face of the upper arm, the axis of the bottom end of the positioning strip 6 close to the pedestal
Side is provided with the arc port to match with the spring 13 to be tested；Removably be connected on the upper surface of the underarm with
The parallel cushion block 7 of the spring to be tested 13.It is to be measured in order to preferably limit by the way that positioning strip 6 and 7 one side of cushion block is arranged
On the other hand the position of trial work part also allows for the replacement and maintenance in later stage to obtain more accurate test data, reduction is worn to
This.
In this embodiment, in order to enable positioning clamping fixture 5 obtains longer stroke, multiple positioning clamping fixtures 5 are enabled to
What is leaned on towards center close to the horizontal cross-section of one end of the axis of the pedestal is triangle closer to, it is preferable that the underarm
Shape is trapezoidal, and the adjacent side wall in one end of axis of adjacent two underarms close to the pedestal is mutually parallel.Wherein, more
A underarm is 360 degree close to the sum of angle of two sides of horizontal cross-section of one end of axis of pedestal, is implemented as better
Mode, underarm are isosceles triangle or isosceles trapezoid close to the horizontal cross-section of one end of the axis of pedestal.
In this embodiment, in order to enable each 13 uniform force of spring to be tested, it is preferable that the plane pressure head 1
Pressure surface be circle, multiple pressing plates are described along being parallel to the circular tangential direction removably and being equably fixed in
The bottom end of plane pressure head 1.Certainly, the pressure surface of plane pressure head 1 may be equilateral polygon, and multiple pressing plates are evenly arranged in
The bottom end of side polygon.Either which kind of mode, pressing plate are required for positioned at the top of spring 13 to be tested and are parallel to be tested
Spring 13.
In this embodiment, for the ease of the dismounting of pressing plate and replacement consumptive material, in this embodiment it is preferred that ground, institute
It includes link block 2 and press strip 3 to state pressing plate, and the bottom end of the link block 2 is provided with baltimore groove, and the slot bottom of the baltimore groove is provided with
Multiple bolts hole, multiple bolts are bolted in the plane pressure head 1 so that the link block 2 is removably solid across the bolt hole
It is connected to the plane pressure head 1；The both ends of the press strip 3 are respectively arranged with counter sink, the countersunk head spiral shell to match with the counter sink
Bolt passes through the counter sink and is bolted in the link block 2 so that the press strip 3 is removably fixed in the link block 2.It is logical
Such implementation is crossed, pressing plate can be changed easily very much, and when clamp portion damages, need not all be replaced, and only be needed
Want removable parts.The bottom end of link block 2 is provided with baltimore groove and is on the one hand easy for assembling-disassembling bolt, it on the other hand, can be with
The length for reducing used bolt, increases the buckle resistance of bolt, improves the service life of pressing plate.
In this embodiment, in order to improve the stability of test process, it is preferable that at least one positioning clamping fixture 5
Both sides be respectively and fixedly connected with limiting plate 4, the one end of the limiting plate 4 far from the positioning clamping fixture 5 extends to the side of the pressing plate
While to limit the pressing plate transverse shifting.Limiting plate 4 is for blocking the both sides of pressing plate to prevent pressure head during the test because shaking
It moves and rotates.
In this embodiment, in order to further increase the stability of test process preferably, the limiting plate 4 is steel
Plate.The rigidity of steel plate is stronger, can achieve the effect that better clamping pressing plate both sides.
Preferred embodiments of the present invention, still, the utility model and unlimited are described in detail above in association with attached drawing
Detail in the above embodiment can be to the skill of the utility model in the range of the technology design of the utility model
Art scheme carries out a variety of simple variants, these simple variants belong to the scope of protection of the utility model.
It is further to note that specific technical features described in the above specific embodiments, in not lance
It in the case of shield, can be combined by any suitable means, in order to avoid unnecessary repetition, the utility model is to each
The possible combination of kind no longer separately illustrates.
In addition, arbitrary combination can also be carried out between a variety of different embodiments of the utility model, as long as it is not disobeyed
The thought for carrying on the back the utility model, equally should be considered as content disclosed in the utility model.
Claims (10)
1. a kind of tooling of spring fatigue test, which is characterized in that the tooling includes：Plane pressure head (1), pedestal, pressing plate and
Positioning clamping fixture (5), the plane pressure head (1) are located at the top of the pedestal and coaxial arrangement, are connected on the plane pressure head (1)
There is the pressure providing device for driving the plane pressure head (1) vertically moving；
Radially direction reach out to and is provided with multiple rail bars (8) periphery of the pedestal, multiple positioning clamping fixtures (5)
Be respectively arranged on each rail bar (8), and can respectively along the length direction of the corresponding rail bar (8) slide with into
Line position sets adjusting；
Multiple pressing plates are corresponding with each positioning clamping fixture (5) respectively and are removably fixed in the plane pressure head
(1) on, the corresponding pressing plate is matched with the positioning clamping fixture (5) to compress spring to be tested (13).
2. the tooling of spring fatigue test according to claim 1, which is characterized in that the bottom of the positioning clamping fixture (5)
It is provided with the track slot (12) to match with the rail bar (8), is arranged at least one side wall of the track slot (12) and is parallel to
The strip through-hole (10) of the rail bar (8), the positioning bolt (9) to match with the strip through-hole (10) are logical across the bar shaped
Hole (10) is simultaneously bolted in the position that the rail bar (8) is located at the fixation positioning clamping fixture (5) on the rail bar (8).
3. the tooling of spring fatigue test according to claim 2, which is characterized in that the outer wall of the positioning clamping fixture (5)
On be provided with the accommodating groove (11) coaxial with the strip through-hole (10), the aperture of the accommodating groove (11) is logical more than the bar shaped
The aperture in hole (10).
4. the tooling of spring fatigue test according to claim 1, which is characterized in that the top of the positioning clamping fixture (5)
It is provided with locating slot of the opening towards the U-shaped of the axis direction of the pedestal, the upper arm lengths of the locating slot are less than described fixed
The lower arm lengths of position slot.
5. the tooling of spring fatigue test according to claim 4, which is characterized in that removable on the lower face of the upper arm
Be connected with positioning strip (6) with unloading, the bottom end of the positioning strip (6) close to the axis side of the pedestal be provided with it is described to be measured
The arc port that examination spring (13) matches；
The cushion block (7) parallel with spring (13) to be tested is removably connected on the upper surface of the underarm.
6. the tooling of spring fatigue test according to claim 4, which is characterized in that the underarm is close to the pedestal
The horizontal cross-section of one end of axis is triangle or trapezoidal, and one end of axis of adjacent two underarms close to the pedestal
Adjacent side wall is mutually parallel.
7. the tooling of spring fatigue test according to claim 1, which is characterized in that the pressure surface of the plane pressure head (1)
For circle, multiple pressing plates edges are parallel to the circular tangential direction removably and are equably fixed in the plane pressure
The bottom end of head (1).
8. the tooling of spring fatigue test according to claim 1 or claim 7, which is characterized in that the pressing plate includes link block
(2) and press strip (3), the bottom end of the link block (2) are provided with baltimore groove, and the slot bottom of the baltimore groove is provided with multiple bolts
Hole, multiple bolts are bolted in the plane pressure head (1) so that the link block (2) to be removably fixed in across the bolt hole
The plane pressure head (1)；
The both ends of the press strip (3) are respectively arranged with counter sink, and it is described heavy to be passed through with the dormant bolt that the counter sink matches
Head bore is simultaneously bolted in the link block (2) so that the press strip (3) is removably fixed in the link block (2).
9. the tooling of the spring fatigue test according to any one in claim 1-7, which is characterized in that at least one
The both sides of the positioning clamping fixture (5) have been respectively and fixedly connected with limiting plate (4), the limiting plate (4) far from the positioning clamping fixture (5) one
End extends to the side of the pressing plate to limit the pressing plate transverse shifting.
10. the tooling of spring fatigue test according to claim 9, which is characterized in that the limiting plate (4) is steel plate.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721680632.2U CN207636420U (en) | 2017-12-06 | 2017-12-06 | A kind of tooling of spring fatigue test |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721680632.2U CN207636420U (en) | 2017-12-06 | 2017-12-06 | A kind of tooling of spring fatigue test |
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| Publication Number | Publication Date |
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| CN207636420U true CN207636420U (en) | 2018-07-20 |
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| CN201721680632.2U Active CN207636420U (en) | 2017-12-06 | 2017-12-06 | A kind of tooling of spring fatigue test |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109708859A (en) * | 2018-12-16 | 2019-05-03 | 安徽省巢湖铸造厂有限责任公司 | Adjustable rail clip fatigue experimental device |
| CN109799135A (en) * | 2019-02-19 | 2019-05-24 | 北京建筑大学 | Railway I type spring high-cycle fatigue test fixture and system |
| CN110018054A (en) * | 2019-03-27 | 2019-07-16 | 北京铁科首钢轨道技术股份有限公司 | A kind of multistation spring fatigue tooling |
| CN110823555A (en) * | 2020-01-10 | 2020-02-21 | 北京铁科首钢轨道技术股份有限公司 | Elastic part fatigue test tool |
| CN110823554A (en) * | 2020-01-10 | 2020-02-21 | 北京铁科首钢轨道技术股份有限公司 | Multi-station elastic fatigue test tool |
| JP2020109404A (en) * | 2018-12-29 | 2020-07-16 | 中国▲鉄▼道科学研究院集▲団▼有限公司▲鉄▼道建筑研究所Ｃｈｉｎａ Ａｃａｄｅｍｙ Ｏｆ Ｒａｉｌｗａｙ Ｓｃｉｅｎｃｅｓ Ｃｏｒｐｏｒａｔｉｏｎ Ｌｉｍｉｔｅｄ， Ｒａｉｌｗａｙ Ｅｎｇｉｎｅｅｒｉｎｇ Ｒｅｓｅａｒｃｈ Ｉｎｓｔｉｔｕｔｅ | High-frequency fatigue and dynamic load tester for clip for fastener of railroad rail |
| KR102173934B1 (en) * | 2019-11-27 | 2020-11-04 | 대원강업주식회사 | Fatigue Inspection Device of Rail Fastener Spring for High-Speed Railroad |
| CN113567101A (en) * | 2021-07-26 | 2021-10-29 | 北京铁科首钢轨道技术股份有限公司 | Multi-station elastic strip fatigue test device |
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2017
- 2017-12-06 CN CN201721680632.2U patent/CN207636420U/en active Active
Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109708859A (en) * | 2018-12-16 | 2019-05-03 | 安徽省巢湖铸造厂有限责任公司 | Adjustable rail clip fatigue experimental device |
| JP2020109404A (en) * | 2018-12-29 | 2020-07-16 | 中国▲鉄▼道科学研究院集▲団▼有限公司▲鉄▼道建筑研究所Ｃｈｉｎａ Ａｃａｄｅｍｙ Ｏｆ Ｒａｉｌｗａｙ Ｓｃｉｅｎｃｅｓ Ｃｏｒｐｏｒａｔｉｏｎ Ｌｉｍｉｔｅｄ， Ｒａｉｌｗａｙ Ｅｎｇｉｎｅｅｒｉｎｇ Ｒｅｓｅａｒｃｈ Ｉｎｓｔｉｔｕｔｅ | High-frequency fatigue and dynamic load tester for clip for fastener of railroad rail |
| RU2747792C2 (en) * | 2018-12-29 | 2021-05-14 | Реилвей Энджиниринг Рисерч Инститьют, Чайна Акэдеми Оф Реилвей Сайенсис Корпорейшн Лимитед | High frequency fatigue dynamic load test machine for rail fixing spring bars |
| CN109799135A (en) * | 2019-02-19 | 2019-05-24 | 北京建筑大学 | Railway I type spring high-cycle fatigue test fixture and system |
| CN109799135B (en) * | 2019-02-19 | 2021-11-23 | 北京建筑大学 | Railway I-type elastic strip high-frequency fatigue test fixture and system |
| CN110018054A (en) * | 2019-03-27 | 2019-07-16 | 北京铁科首钢轨道技术股份有限公司 | A kind of multistation spring fatigue tooling |
| CN110018054B (en) * | 2019-03-27 | 2023-12-26 | 北京铁科首钢轨道技术股份有限公司 | Multi-station spring bar fatigue tool |
| KR102173934B1 (en) * | 2019-11-27 | 2020-11-04 | 대원강업주식회사 | Fatigue Inspection Device of Rail Fastener Spring for High-Speed Railroad |
| CN110823555A (en) * | 2020-01-10 | 2020-02-21 | 北京铁科首钢轨道技术股份有限公司 | Elastic part fatigue test tool |
| CN110823554A (en) * | 2020-01-10 | 2020-02-21 | 北京铁科首钢轨道技术股份有限公司 | Multi-station elastic fatigue test tool |
| CN110823554B (en) * | 2020-01-10 | 2020-06-12 | 北京铁科首钢轨道技术股份有限公司 | Multi-station elastic fatigue test tool |
| CN113567101A (en) * | 2021-07-26 | 2021-10-29 | 北京铁科首钢轨道技术股份有限公司 | Multi-station elastic strip fatigue test device |
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