CN110094447A - A kind of oil-pressure damper with filter device - Google Patents
A kind of oil-pressure damper with filter device Download PDFInfo
- Publication number
- CN110094447A CN110094447A CN201910502710.7A CN201910502710A CN110094447A CN 110094447 A CN110094447 A CN 110094447A CN 201910502710 A CN201910502710 A CN 201910502710A CN 110094447 A CN110094447 A CN 110094447A
- Authority
- CN
- China
- Prior art keywords
- oil
- filter device
- inner cylinder
- pressure damper
- cylinder
- 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
Links
- 238000003860 storage Methods 0.000 claims abstract description 38
- 238000013016 damping Methods 0.000 claims abstract description 24
- 230000001105 regulatory effect Effects 0.000 claims abstract description 9
- 238000001914 filtration Methods 0.000 claims description 10
- 201000008482 osteoarthritis Diseases 0.000 claims description 7
- NJPPVKZQTLUDBO-UHFFFAOYSA-N novaluron Chemical compound C1=C(Cl)C(OC(F)(F)C(OC(F)(F)F)F)=CC=C1NC(=O)NC(=O)C1=C(F)C=CC=C1F NJPPVKZQTLUDBO-UHFFFAOYSA-N 0.000 claims description 6
- 239000000835 fiber Substances 0.000 claims description 5
- 238000007789 sealing Methods 0.000 claims description 5
- 239000003365 glass fiber Substances 0.000 claims description 4
- 229920000728 polyester Polymers 0.000 claims description 4
- 239000000463 material Substances 0.000 claims description 3
- 239000010935 stainless steel Substances 0.000 claims description 3
- 229910001220 stainless steel Inorganic materials 0.000 claims description 3
- 229920000914 Metallic fiber Polymers 0.000 claims description 2
- 239000007788 liquid Substances 0.000 abstract description 27
- 230000000694 effects Effects 0.000 abstract description 5
- 239000011162 core material Substances 0.000 description 28
- 239000012535 impurity Substances 0.000 description 18
- 238000000034 method Methods 0.000 description 6
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 4
- 239000006096 absorbing agent Substances 0.000 description 2
- 230000009471 action Effects 0.000 description 2
- 230000000903 blocking effect Effects 0.000 description 2
- 229910052742 iron Inorganic materials 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 229910052751 metal Inorganic materials 0.000 description 2
- 238000000746 purification Methods 0.000 description 2
- 230000035939 shock Effects 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 230000002950 deficient Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000004744 fabric Substances 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 238000004064 recycling Methods 0.000 description 1
- 230000008439 repair process Effects 0.000 description 1
- 230000006641 stabilisation Effects 0.000 description 1
- 238000011105 stabilization Methods 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 239000000725 suspension Substances 0.000 description 1
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16F—SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
- F16F9/00—Springs, vibration-dampers, shock-absorbers, or similarly-constructed movement-dampers using a fluid or the equivalent as damping medium
- F16F9/10—Springs, vibration-dampers, shock-absorbers, or similarly-constructed movement-dampers using a fluid or the equivalent as damping medium using liquid only; using a fluid of which the nature is immaterial
- F16F9/14—Devices with one or more members, e.g. pistons, vanes, moving to and fro in chambers and using throttling effect
- F16F9/16—Devices with one or more members, e.g. pistons, vanes, moving to and fro in chambers and using throttling effect involving only straight-line movement of the effective parts
- F16F9/18—Devices with one or more members, e.g. pistons, vanes, moving to and fro in chambers and using throttling effect involving only straight-line movement of the effective parts with a closed cylinder and a piston separating two or more working spaces therein
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16F—SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
- F16F9/00—Springs, vibration-dampers, shock-absorbers, or similarly-constructed movement-dampers using a fluid or the equivalent as damping medium
- F16F9/32—Details
- F16F9/3285—Details for filtering
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16F—SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
- F16F9/00—Springs, vibration-dampers, shock-absorbers, or similarly-constructed movement-dampers using a fluid or the equivalent as damping medium
- F16F9/32—Details
- F16F9/34—Special valve constructions; Shape or construction of throttling passages
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16F—SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
- F16F9/00—Springs, vibration-dampers, shock-absorbers, or similarly-constructed movement-dampers using a fluid or the equivalent as damping medium
- F16F9/32—Details
- F16F9/38—Covers for protection or appearance
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Fluid-Damping Devices (AREA)
Abstract
The present invention provides a kind of oil-pressure dampers with filter device, including inner cylinder, oil storage cylinder, piston, piston rod, guide holder and bottom valve, the inside of the oil storage cylinder is arranged in the inner cylinder, the inside of the inner cylinder is arranged in the piston, one end of the piston rod is connected with the piston, its other end sequentially passes through the inner cylinder and oil storage cylinder, one end of the oil storage cylinder is equipped with guide holder, the other end is equipped with bottom valve, the guide holder is equipped with damping regulating valve, filter device is equipped in annular seal zones between the inner cylinder and oil storage cylinder, the inside in the outside or oil storage cylinder of the filter device and inner cylinder is equipped with gap, the filter device includes the filter core of shell and setting inside the shell.The present invention provides a kind of oil-pressure dampers with filter device, are not only simple in structure, and filter effect is good, while can effectively purify oil liquid.
Description
Technical field
The present invention relates to oil-pressure damper technical fields, particularly, are related to a kind of oil-pressure damper with filter device.
Background technique
Important component of the damper as vehicle suspension system influences safety, stationarity and the comfort of vehicle operation.
The working principle of oil-pressure damper is oil liquid by damping hole or damping regulating valve generation damping force, to reach vibration damping
Effect.Damping hole inside damper is all smaller, and general diameter is between 0.2mm-1mm.If there are impurity in oil liquid,
It is just very easy to blocking aperture, damping force is caused to increase extremely.If can be made in addition, impurity is stained in the end face of damping regulating valve
At poorly sealed, generation leakage, so that damping force reduces.For oil-pressure damper, the stabilization of damping force is extremely important
Index, no matter becoming larger or becoming smaller all is not intended to see, thus it is guaranteed that the cleannes of internal oil are extremely important
's.However the impurity inside damper is inevitable, even if production and assembling process in cleaning do it is good again, can only
The impurity in oil liquid is reduced, does not accomplish to eradicate completely.
In the prior art, in order to guarantee the cleannes of damper internal oil, there is following several method: (1), in damper
Magnet is placed in inside, adsorbs iron filings impurity；(2), arrange filter screen in damping hole and the entrance of regulating valve, stop impurity into
Enter, prevents from blocking damping hole.The shortcomings that method (1), is: iron filings can only be adsorbed, it is helpless to remaining impurity, and magnet
It is easy to have an impact internal orifice valve, or even causes damping defective valve.The shortcomings that method (2) is: damping valve of damper can
Guide holder, piston can be arranged in, on bottom valve, if to guarantee filter effect, this is required to arrangement filter screen, structure in position at three
It is more complicated, and strainer can only stop impurity, and cannot play the role of purifying oil liquid.
Therefore, it is badly in need of a kind of new technique of oil-pressure damper with filter device in the industry.
Summary of the invention
It is an object of that present invention to provide a kind of structure is simple, filter effect is good, while can effectively purify having for oil liquid
The oil-pressure damper of filter device, to solve above-mentioned problems of the prior art.
To achieve the above object, the present invention provides a kind of oil-pressure dampers with filter device, including inner cylinder, storage
The inside of the oil storage cylinder is arranged in oil cylinder, piston, piston rod, guide holder and bottom valve, the inner cylinder, and the piston setting exists
The inside of the inner cylinder, one end of the piston rod are connected with the piston, and other end sequentially passes through the interior oil
Cylinder and oil storage cylinder, one end of the oil storage cylinder are equipped with guide holder, and the other end is equipped with bottom valve, and the guide holder is equipped with damping and adjusts
Valve is equipped with filter device, the filter device and inner cylinder in the annular seal zones between the inner cylinder and oil storage cylinder
Outside or the inside of oil storage cylinder be equipped with gap, the filter device includes shell and setting filter core inside the shell.
Further, the shell of the filter device is reticulated porous structures；The material of the filter core is metallic fiber, no
Become rusty steel knitmesh, polyester fiber or glass fibre.
Further, the filter element filtering precision is 5 μm -100 μm.
Further, the damping regulating valve include the adjusting blind nut being sequentially connected from top to bottom, the first spring, valve seat and
Pedestal.
Further, the bottom valve includes the bottom valve blind nut being sequentially connected from top to bottom, second spring and bottom valve valve block.
Further, the guide holder by outer blind nut by oil storage cylinder forward end seal, between the guide holder and outer blind nut
Equipped with sealing element.
Further, one end of the piston rod and piston are connected through a screw thread.
Further, the front end of the guide holder and be located at piston rod periphery be successively arranged dirt-proof boot and shield.
Further, one end that the piston rod passes through shield is equipped with front end rubber arthrosis, is connected on the bottom valve
Rear end rubber arthrosis.
The invention has the following advantages:
A kind of oil-pressure damper with filter device provided by the invention, passes through the inner cylinder and oil storage cylinder in damper
Between annular seal zones in be arranged an annular filter device, the outside or oil storage of the filter device and inner cylinder
The inside of cylinder is equipped with gap, to have the function that filtering and purification oil liquid.Specifically, the filter device includes shell and setting
Filter core inside the shell.Wherein, the shell of the filter device is reticulated porous structures, and the filter core material that inside is equipped with is that metal is fine
Dimension, stainless steel knitmesh, polyester fiber or glass fibre, filtering accuracy are 5 μm -100 μm.When shock absorber movement, comprising miscellaneous
The oil liquid of matter can flow through filter core, due to being layer upon layer of labyrinth structure inside filter core, and filter core have certain thickness and
Length, the impurity in oil liquid can be obstructed layer by layer once flowing by filter core layering, finally be trapped in the inside of filter core, and oil liquid
Then can be accessible pass through.The filtering accuracy of filter core can be specifically determined according to actual needs.Due to being inside damper
With the external world any air or mass exchange do not occur for the structure of one sealing, as long as filtering out production when damper is initially run
Raw impurity does not have new impurity and generates, and damper is left on inside filter core through operation after a period of time, impurity, oil liquid
Cleannes can be higher and higher, so as to play effectively purification oil liquid purpose.
Other than objects, features and advantages described above, there are also other objects, features and advantages by the present invention.
Below with reference to figure, the present invention is described in further detail.
Detailed description of the invention
The attached drawing constituted part of this application is used to provide further understanding of the present invention, schematic reality of the invention
It applies example and its explanation is used to explain the present invention, do not constitute improper limitations of the present invention.In the accompanying drawings:
Fig. 1 is the structural schematic diagram of the preferred embodiment of the present invention；
Wherein, 1, front end rubber arthrosis, 2, shield, 3, dirt-proof boot, 4, outer blind nut, 5, seal assembly, 6, damping adjusting
Valve, 7, guide holder, 8, oil storage cylinder, 9, inner cylinder, 10, piston, 11, shell, 12, filter core, 13, bottom valve, 14, rear end rubber pass
Section, 15, piston rod.
Specific embodiment
The embodiment of the present invention is described in detail below in conjunction with attached drawing, but the present invention can be limited according to claim
Fixed and covering multitude of different ways is implemented.
Referring to Fig. 1, a kind of oil-pressure damper with filter device, including inner cylinder 9, oil storage cylinder 8, piston 10, piston
The inside of the oil storage cylinder 8 is arranged in bar 15, guide holder 7 and bottom valve 13, the inner cylinder 9, and the piston 10 is arranged described
The inside of inner cylinder 9, one end of the piston rod 15 and the piston 10 are connected through a screw thread, and other end sequentially passes through institute
Inner cylinder 9 and oil storage cylinder 8 are stated, one end of the oil storage cylinder 8 is equipped with guide holder 7, and the other end is equipped with bottom valve 13, the guide holder 7
It is equipped with damping regulating valve 6, is equipped with filter device in the annular seal zones between the inner cylinder 9 and oil storage cylinder 8, it is described
The inside in the outside or oil storage cylinder 8 of filter device and inner cylinder 9 is equipped with gap, and the filter device includes 11 shells and setting
Filter core 12 in shell 11.The shell 11 of the filter device is reticulated porous structures；The material of the filter core 12 is metal
Fiber, stainless steel knitmesh, polyester fiber or glass fibre.12 filtering accuracy of filter core is 5 μm -100 μm.
The damping regulating valve 6 includes adjusting blind nut, the first spring, valve seat and the pedestal being sequentially connected from top to bottom.It leads
It is provided with tapped valve opening on seat, adjusts blind nut by screw thread and the first spring, valve seat, pedestal is sequentially arranged at valve opening
It is interior.When damper does not move, valve seat is fitted closely under the action of the first spring with pedestal, and damping regulating valve, which is in, closes shape
State.When damper stretches and compresses, the damping force that oil liquid generates overcomes spring force, and gap occur in valve seat and pedestal, and damping is adjusted
It is in the open state to save valve, oil liquid can enter oil storage cylinder 8 by inner cylinder 9.
The bottom valve is check valve, including bottom valve blind nut, second spring and the bottom valve valve block being sequentially connected from top to bottom.Subtract
When the device that shakes compresses, bottom valve valve block is adjacent to bottom valve under the action of second spring, and bottom valve is in close state, inner cylinder 9 and oil storage
Cylinder 8 is completely isolated, and oil liquid can not be flowed out by inner cylinder 9.When damper stretches, bottom valve valve block overcomes spring force, and bottom valve is opened, interior
Oil cylinder 9 is connected to oil storage cylinder 8, and oil liquid can enter inner cylinder 9 by oil storage cylinder 8.
In a specific embodiment, the guide holder 7 is by outer blind nut 4 by 8 forward end seal of oil storage cylinder, the guiding
Sealing element 5 is equipped between seat and outer blind nut.
In a specific embodiment, the front end of the guide holder 7 and be located at piston rod 15 periphery be successively arranged it is anti-
Dirt set 3 and shield 2.
In a specific embodiment, the other end that the piston rod 15 passes through shield 2 is equipped with front end rubber arthrosis
1, rear end rubber arthrosis 14 is connected on the bottom valve 13.
A kind of ring-shaped section and ring-shaped structure of the filter device of the oil-pressure damper with filter device, be mounted on inner cylinder with
In annular seal zones between oil storage cylinder, limited without specific position.The internal diameter of the shell of the filter device with it is interior
Oil cylinder fitting, outer diameter and oil storage cylinder have certain gap.Or the outer diameter of the shell of the filter device can be pasted with oil storage cylinder
It closes, internal diameter and inner cylinder have certain gap, also reach same effect.The filter device also can be made two semicircles, cloth
Set the gap between inner cylinder and oil storage cylinder.Part oil liquid, which does not flow into filter core, does not have the filtering of entire oil-pressure damper
It influences, only needs part oil liquid through filtration core, because oil liquid can be filtered by ceaselessly recycling.
In filter core is wrapped in by the shell of the filter device, prevent filter core mobile.Filter case is by reticulated porous structures
Composition guarantees that oil liquid can enter.Oil liquid can enter filter core in damper internal flow by shell, and impurity enters filter
Core can not just come out, and oil liquid can but have free passage.When shock absorber movement, the oil liquid comprising impurity can flow through filter core.Due to
It is layer upon layer of labyrinth structure inside filter core, and filter core has certain thickness and length, the impurity in oil liquid once flows
Enter, can be obstructed layer by layer by filter core layering, be finally trapped in the inside of filter core, and what oil liquid then can be accessible passes through.Filter core
Filtering accuracy can be specifically determined according to actual needs.Due to being the structure of a sealing inside damper, not with the external world
Any air or mass exchange occurs, only need to filter out the impurity generated when damper is initially run, not have new impurity
It generating, damper is left on inside filter core through operation after a period of time, impurity, and the cleannes of oil liquid can be higher and higher, thus
It can play the role of effectively purifying oil liquid.
The foregoing is only a preferred embodiment of the present invention, is not intended to restrict the invention, for the skill of this field
For art personnel, the invention may be variously modified and varied.All within the spirits and principles of the present invention, made any to repair
Change, equivalent replacement, improvement etc., should all be included in the protection scope of the present invention.
Claims (9)
1. a kind of oil-pressure damper with filter device, which is characterized in that including inner cylinder, oil storage cylinder, piston, piston rod,
The inside of the oil storage cylinder is arranged in guide holder and bottom valve, the inner cylinder, and the inside of the inner cylinder is arranged in the piston,
One end of the piston rod is connected with the piston, and other end sequentially passes through the inner cylinder and oil storage cylinder, the storage
One end of oil cylinder is equipped with guide holder, and the other end is equipped with bottom valve, and the guide holder is equipped with damping regulating valve, the inner cylinder and storage
Filter device is equipped in annular seal zones between oil cylinder, the outside or oil storage cylinder of the filter device and inner cylinder
Inside is equipped with gap, and the filter device includes the filter core of shell and setting inside the shell.
2. a kind of oil-pressure damper with filter device according to claim 1, which is characterized in that the filter device
Shell be reticulated porous structures；The material of the filter core is metallic fiber, stainless steel knitmesh, polyester fiber or glass fibers
Dimension.
3. a kind of oil-pressure damper with filter device according to claim 2, which is characterized in that the filter element filtering
Precision is 5 μm -100 μm.
4. a kind of oil-pressure damper with filter device according to claim 1, which is characterized in that the damping is adjusted
Valve includes the adjusting blind nut being sequentially connected from top to bottom, the first spring, valve seat and pedestal.
5. a kind of oil-pressure damper with filter device according to claim 1, which is characterized in that the bottom valve includes
Bottom valve blind nut, second spring and the bottom valve valve block being sequentially connected from top to bottom.
6. a kind of oil-pressure damper with filter device according to claim 1, which is characterized in that the guide holder is logical
Outer blind nut is crossed by oil storage cylinder forward end seal, sealing element is equipped between the guide holder and outer blind nut.
7. a kind of oil-pressure damper with filter device according to claim 1, which is characterized in that the piston rod
One end and piston are connected through a screw thread.
8. a kind of oil-pressure damper with filter device according to claim 1, which is characterized in that the guide holder
Front end and be located at piston rod periphery be successively arranged dirt-proof boot and shield.
9. a kind of oil-pressure damper with filter device according to claim 8, which is characterized in that the piston rod is worn
The one end for crossing shield is equipped with front end rubber arthrosis, is connected with rear end rubber arthrosis on the bottom valve.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910502710.7A CN110094447A (en) | 2019-06-11 | 2019-06-11 | A kind of oil-pressure damper with filter device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910502710.7A CN110094447A (en) | 2019-06-11 | 2019-06-11 | A kind of oil-pressure damper with filter device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN110094447A true CN110094447A (en) | 2019-08-06 |
Family
ID=67450735
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910502710.7A Pending CN110094447A (en) | 2019-06-11 | 2019-06-11 | A kind of oil-pressure damper with filter device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN110094447A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111692266A (en) * | 2020-06-11 | 2020-09-22 | 中国第一汽车股份有限公司 | Electro-hydraulic proportional valve and continuous damping control shock absorber |
| CN116085417A (en) * | 2022-12-29 | 2023-05-09 | 无锡惠发特精密机械有限公司 | Oil storage cylinder of oil pressure shock absorber for motor train unit and preparation process of oil storage cylinder |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN202531713U (en) * | 2012-03-09 | 2012-11-14 | 宁波南方减震器制造有限公司 | Oil pressure damper |
| CN207145516U (en) * | 2017-08-25 | 2018-03-27 | 周学昌 | The anti-snake movement oil pressure shock absorber of magnetic valve used for rail vehicle |
| CN108518443A (en) * | 2018-04-24 | 2018-09-11 | 湖南联诚轨道装备有限公司 | Anti- snake movement oil pressure shock absorber, track train and its design method of adaptive damping |
| CN210003734U (en) * | 2019-06-11 | 2020-01-31 | 湖南联诚轨道装备有限公司 | oil pressure damper with filter device |
-
2019
- 2019-06-11 CN CN201910502710.7A patent/CN110094447A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN202531713U (en) * | 2012-03-09 | 2012-11-14 | 宁波南方减震器制造有限公司 | Oil pressure damper |
| CN207145516U (en) * | 2017-08-25 | 2018-03-27 | 周学昌 | The anti-snake movement oil pressure shock absorber of magnetic valve used for rail vehicle |
| CN108518443A (en) * | 2018-04-24 | 2018-09-11 | 湖南联诚轨道装备有限公司 | Anti- snake movement oil pressure shock absorber, track train and its design method of adaptive damping |
| CN210003734U (en) * | 2019-06-11 | 2020-01-31 | 湖南联诚轨道装备有限公司 | oil pressure damper with filter device |
Non-Patent Citations (1)
| Title |
|---|
| 张习泉主编: "《汽车发动机管理系统检测与维修》", 北京：北京理工大学出版社, pages: 53 * |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111692266A (en) * | 2020-06-11 | 2020-09-22 | 中国第一汽车股份有限公司 | Electro-hydraulic proportional valve and continuous damping control shock absorber |
| CN111692266B (en) * | 2020-06-11 | 2021-12-03 | 中国第一汽车股份有限公司 | Electro-hydraulic proportional valve and continuous damping control shock absorber |
| CN116085417A (en) * | 2022-12-29 | 2023-05-09 | 无锡惠发特精密机械有限公司 | Oil storage cylinder of oil pressure shock absorber for motor train unit and preparation process of oil storage cylinder |
| CN116085417B (en) * | 2022-12-29 | 2023-10-10 | 无锡惠发特精密机械有限公司 | Oil storage cylinder of oil pressure shock absorber for motor train unit and preparation process of oil storage cylinder |
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