CN106481721A - Shock absorber piston assembly and hydraulic damper - Google Patents
Shock absorber piston assembly and hydraulic damper Download PDFInfo
- Publication number
- CN106481721A CN106481721A CN201611125247.1A CN201611125247A CN106481721A CN 106481721 A CN106481721 A CN 106481721A CN 201611125247 A CN201611125247 A CN 201611125247A CN 106481721 A CN106481721 A CN 106481721A
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- Prior art keywords
- port
- throttle
- piston body
- face
- piston
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Classifications
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- 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
- F16F9/3207—Constructional features
- F16F9/3214—Constructional features of pistons
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- 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
- F16F9/3405—Throttling passages in or on piston body, e.g. slots
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- 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
- F16F2222/00—Special physical effects, e.g. nature of damping effects
- F16F2222/12—Fluid damping
Abstract
The present invention proposes a kind of hydraulic piston assembly and the hydraulic damper with this piston component.Hydraulic piston assembly includes piston body, the first opening and closing piece, the second opening and closing piece, throttle valve component etc..The piston circulating face of the present invention is equal with the circulation area in the face of recovery, symmetrical configuration, in vibroshock test experiments, can reach the requirement that indicator card degree of asymmetry is less than 10；Throttle valve component is had in itself on piston, can directly adjusting part adjusting the compression stress of whole vibroshock with recuperability it is ensured that the requirement to vibration absorber of rail vehicle for the high-speed railway.
Description
Technical field
The present invention relates to a kind of shock absorber piston assembly and the hydraulic buffer with this piston component.
Background technology
Safely and smoothly run on the line for guarantee rail vehicle, existing rail vehicle, i.e. EMU, machine
All widely used hydraulic buffer carries out vibration damping above for car vehicle, light rail, subway etc., and its Main Function is to reduce vehicle in fortune
It is derived from wheel to the vibration causing during with rail contact and impact, thus improving the safety of vehicle operation, stationarity, economy in row
Property and the comfortableness of passenger.
Vibroshock operation principle is to absorb vibrational energy using the negative work that liquid sticky resistance is done, and its essence is exactly one
Individual damping element.When there being dynamic excitation, it plays buffering, absorbs and catabiotic effect, converts mechanical energy into other shapes
The energy of formula is dispersed in surrounding.It is provided with multiple damping holes and valve mechanism, hydraulic oil is in duct in hydraulic buffer
In produce frictional damping effect when flowing back and forth, absorb the energy of body oscillating, thus reaching the purpose of decay vibration.
At present, domestic high-speed railway vibroshock almost all adopts imported product, and this is due to domestic vibroshock relevant group
Part especially piston is extremely difficult to the job requirement of high-speed railway vibroshock, conventional damper damping adjust complicated, time-consuming, take
Power, its reason is that existing vibroshock has certain defect in structure design, so that the indicator card that experiment draws does not meet height
Fast rolling stock requires to vibroshock.
In view of this, the special proposition present invention.
Content of the invention
It is contemplated that at least solving one of technical problem in correlation technique to a certain extent.
For this reason, the first object of the present invention is to propose the damping that a kind of damping is easy to adjust, structure is simple, easy to assembly
Device piston component.Concrete technical scheme is as follows：
A kind of shock absorber piston assembly, including：Piston body, described piston body has along described piston body axially through institute
State the centre bore of piston body, the first end face of described piston body has the first inner circle of the first port around described centre bore
Ring and the first outer toroid around described first interior annular, the second end face of described piston body has around described centre bore
The second interior annular of second port and the second outer toroid around described second interior annular, described piston body also has at least
One first throttle duct and at least one second throttle orifice road, the first port at least one described first throttle duct is located at
The second port in described first interior annular and at least one described first throttle duct is located in described second outer toroid, at least
The first port in one described second throttle orifice road is located in described first outer toroid and at least one described second throttle orifice road
Second port be located at described second interior annular in；For the normal first port closing at least one described first throttle duct
First opening and closing piece, described first opening and closing piece is located in the first end face of described piston body；For normal closing at least one described the
Second opening and closing piece of the second port in one throttling duct, described second opening and closing piece is located in the second end face of described piston body；With
In adjusting the compression stress of amortisseur with the throttle valve component of recuperability, described throttle valve component includes being sequentially connected the choke valve connecing
Lobe, throttle valve spring and nut, described throttle valve component be arranged on described first throttle duct and described second throttle orifice road
Interior.
In addition, bullet train shock absorber piston according to the above embodiment of the present invention can also have the technology added as follows
Feature：
According to an example of the present invention, the shape at least one described first throttle duct with least one described second
Throttling duct shape identical, the shape of first port at least one described first throttle duct with least one described second
The shape of the second port in throttling duct is identical, the shape of second port at least one described first throttle duct and at least
The shape of the first port in individual described second throttle orifice road is identical.
According to an example of the present invention, the first port at least one described first throttle duct is in described piston body
Radial dimension in first end face is more than the second port at least one described first throttle duct the second of described piston body
Radial dimension on end face, the first port at least one described first throttle duct is in the first end face of described piston body
Circumferential size is less than the circumference in the second end face of described piston body for the second port at least one described first throttle duct
Size；Radial dimension in the first end face of described piston body for the first port at least one described second throttle orifice road is less than
Radial dimension in the second end face of described piston body for the second port at least one described second throttle orifice road, at least one
Circumferential size in the first end face of described piston body for the first port in described second throttle orifice road is more than described at least one
Circumferential size in the second end face of described piston body for the second port in the second throttle orifice road.
According to an example of the present invention, the quantity in described first throttle duct is equal with the quantity in described second throttle orifice road
For three, wherein, the first port in three described first throttle ducts is arranged along the circumferential uniform intervals of described first interior annular,
The second port in three described first throttle ducts is arranged along the circumferential uniform intervals of described second outer toroid, three described second
The first port in throttling duct is arranged along the circumferential uniform intervals of described first outer toroid, the of three described second throttle orifice roads
Two-port netwerk is along the circumferential uniform intervals arrangement of described second interior annular.
According to an example of the present invention, the quantity of described throttle valve component is five, and it includes being arranged on described first
The first valve body in throttling duct, is arranged on the second valve body in described second throttle orifice road, the 3rd valve body and two the 4th valves
Body, the flow of wherein said 4th valve body is adjustable.
According to an example of the present invention, described first interior annular and described second interior annular are symmetrical on described piston body
Arrangement, described first outer toroid is arranged symmetrically on described piston body with described second outer toroid.
According to an example of the present invention, also include the first backup plate and the second backup plate, described first backup plate and described first
Opening and closing piece is connected so that described first is opened and closed piece against the first end face of described piston body, and described second backup plate is opened with described second
Close piece to be connected so that described second is opened and closed piece against the second end face of described piston body.
In addition, the second object of the present invention there are provided a kind of hydraulic shock-absorption with above-mentioned shock absorber piston assembly
Device.
The additional aspect of the present invention and advantage will be set forth in part in the description, and partly will become from the following description
Obtain substantially, or recognized by the practice of the present invention.
Brief description
Fig. 1 is the structural representation () of the shock absorber piston assembly of the present embodiment；
Fig. 2 is the structural representation (two) of the shock absorber piston assembly of the present embodiment；
Fig. 3 is the structural representation of the flap of shock absorber piston assembly of the present embodiment；
Fig. 4 is the structural representation of the throttle valve spring of shock absorber piston assembly of the present embodiment；
Fig. 5 is the structural representation of the nut of shock absorber piston assembly of the present embodiment；
Fig. 6 is the left view of Fig. 1；
Fig. 7 is the right view of Fig. 1；
Fig. 8 is the structural representation of the hydraulic damper of the present embodiment.
Specific embodiment
Embodiments of the invention are described below in detail, the example of described embodiment is shown in the drawings, wherein from start to finish
The element that same or similar label represents same or similar element or has same or like function.Below with reference to attached
The embodiment of figure description is exemplary it is intended to be used for explaining the present invention, and is not considered as limiting the invention.
Below with reference to the accompanying drawings to describe the bullet train shock absorber piston according to the present invention in detail.
As shown in Figures 1 to 8, the piston component according to the present invention, including：Piston body 100, the first opening and closing piece 200 and the
Three opening and closing pieces 300.
Specifically, piston body 100 has the centre bore 101 along piston body 100 axially through piston body 100.Piston
Have in the first end face of body 100 around first interior annular 102 of first port 1011 of centre bore 101 and in first
First outer toroid 103 of annulus 102.The second port 1012 of cincture centre bore 101 is had on the second end face of piston body 100
Second interior annular 104 and the second outer toroid 105 around the second interior annular 104.
Piston body 100 also has at least one first throttle duct 106 and at least one second throttle orifice road 107.At least
The first port 1061 in one first throttle duct 106 is located in the first interior annular 102 and at least one first throttle duct 106
Second port 1062 be located at the second outer toroid 105 in.The first port 1071 at least one the second throttle orifice road 107 is located at the
The second port 1072 in one outer toroid 103 and at least one the second throttle orifice road 107 is located in the second interior annular 104.
First opening and closing piece 200 is located at closes at least one first throttle duct for normal in the first end face of piston body 100
106 first port 1061.
Second opening and closing piece 300 is located at closes at least one second throttle orifice road for normal in the second end face of piston body 100
107 second port 1072.
Throttle valve component 400 is used for adjusting compression stress and the recuperability of amortisseur, and throttle valve component 400 includes being sequentially connected
Throttling flap 401, throttle valve spring 402 and the nut 403 connecing, throttle valve component 400 be arranged on first throttle duct 106 He
In second throttle orifice road 107.
Specifically, the quantity of the throttle valve component of the present embodiment is five, the first valve body 410, the second valve body the 420, the 3rd
Valve body 430 is distributed on piston, and the 4th valve body 440 is equally two and is distributed on piston, the 4th valve body 440 be can according to will
Ask and standard plays the effect of adjustable valve in experiment test.Five valves, three fixations are so had on a piston simultaneously
, two adjustable valves, this novel in structural design, embody the distinctive feature of this piston.
According to the piston component of the present invention, building block is less, structure is simple, be easy to assembling.
According to a specific example of the present invention, the first interior annular 102 is right on piston body 100 with the second interior annular 104
Claim arrangement.First outer toroid 103 is arranged symmetrically on piston body 100 with the second outer toroid 105.
Advantageously, the shape phase in the shape at least one first throttle duct 106 and at least one the second throttle orifice road 107
With.The shape of first port 1061 at least one first throttle duct 106 and the second of at least one the second throttle orifice road 107
The shape of port 1072 is identical.The shape of second port 1062 at least one first throttle duct 106 with least one second
The shape of the first port 1071 in throttling duct 107 is identical.Thus, it is possible to make piston body both sides orifice size identical, enter
And it is equal with recuperability to realize hydraulic buffer compression stress operationally.
Further, the quantity in first throttle duct 106 and the quantity in the second throttle orifice road 107 are three.Wherein, three
The first port 1061 in individual first throttle duct 106 is along the circumferential uniform intervals arrangement of the first interior annular 102, three first throttles
The second port 1062 in duct 106 is along the circumferential uniform intervals arrangement of the second outer toroid 105.Three the second throttle orifice roads 107
First port 1071 is along the circumferential uniform intervals arrangement of the first outer toroid 103, the second port in three the second throttle orifice roads 107
1072 along the second interior annular 104 circumferential uniform intervals arrangement.Thus, it is possible to realize hydraulic buffer further operationally
Compression stress is equal with recuperability.
According to some embodiments of the present invention, the first port 1061 at least one first throttle duct 106 is in piston body
Radial dimension in 100 first end face is more than the second port 1062 at least one first throttle duct 106 in piston body 100
Second end face on radial dimension, the first port 1061 at least one first throttle duct 106 is the first of piston body 100
Circumferential size on end face is less than the second port 1062 at least one first throttle duct 106 at the second end of piston body 100
Circumferential size on face.The first port 1071 at least one the second throttle orifice road 107 is in the first end face of piston body 100
Radial dimension is less than the footpath in the second end face of piston body 100 for the second port 1072 at least one the second throttle orifice road 107
To size, the first port 1071 at least one the second throttle orifice road 107 circumferential size in the first end face of piston body 100
Circumferential size in the second end face of piston body 100 for the second port 1072 more than at least one the second throttle orifice road 107.
Taking first throttle duct 106 as a example to further illustrate below.In the first end face of piston body 100, first segment
The first port 1061 in discharge orifice road 106 is general rectangular；The second port 1062 in first throttle duct 106 is also substantially rectangular
Shape.
So, above-mentioned " radial dimension " should be understood to rectangular width dimensions, and above-mentioned " circumferential size " should
It is interpreted as rectangular length dimension.From Fig. 6 and Fig. 7 it will be clear that the first port 1061 in first throttle duct 106
Width be more than first throttle duct 106 second port 1062 width, the first port 1061 in first throttle duct 106
Length is less than the length of the second port 1062 in first throttle duct 106.The structure in the second throttle orifice road 107 and first segment discharge orifice
The structure in road 106 is identical, repeats no more here.Thus, it is possible to make piston body structure novel,
Advantageously, as shown in figure 1, described piston component also includes the first backup plate 400 and the second backup plate 500.First backup plate
400 are connected so that first is opened and closed piece 200 against the first end face of piston body 100 with the first opening and closing piece 200.Second backup plate 500 with
Second opening and closing piece 300 is connected so that second is opened and closed piece 300 against the second end face of piston body 100.
According to the hydraulic buffer of the present invention, including the shock absorber piston assembly described in any of the above-described.
Specifically, as shown in figure 8, piston cylinder 600 and piston rod 700 are included according to the hydraulic buffer of the present invention.
The left end of piston rod 700 is connected with piston cylinder 600, is located at the right-hand member of piston rod 700 according to the piston component of the present invention.
More specifically, as depicted in figs. 1 and 2, first, by the first backup plate 400, first be opened and closed piece 200, piston body 100, the
Two opening and closing pieces 300 and the second backup plate 500 are through the right-hand member of piston rod 700 successively, are then fixed with nut 800.
In other words, it is full of hydraulic oil in piston cylinder 600, the piston rod 700 with piston component inserts piston cylinder 600
Interior, piston cylinder 600 is divided into two parts space by piston component.First throttle duct 106 and the second throttling are had on piston body 100
Hole is to 107 so that the hydraulic oil in two parts space being separated by piston component can complement each other.Damping is exactly in tool
Produce when sticking hydraulic oil is by first throttle duct 106 or the second throttle orifice road 107, and due to piston body both sides
Circulation area is equal, and operationally produced compression stress is identical with recuperability can to make hydraulic buffer.
The hydraulic buffer of piston component according to the present invention is installed operationally, when piston component is by the of piston body
End face towards piston body second end face move when, the hydraulic oil of second end face side being in piston body is from first throttle duct
Second port enter, wash the first opening and closing piece open so that the first port in first throttle duct is opened, enter eventually into piston body
First end surface side, meanwhile, the hydraulic oil of the second end face side of piston body can also make the second opening and closing piece more reliably close
The second port in two throttling ducts.When piston component by piston body second end face towards piston body first end face move when,
The first port from the second throttle orifice road for the hydraulic oil being in the first end surface side of piston body enters, wash the second opening and closing piece open so that
The second port in the second throttle orifice road is opened, and enters eventually into the second end face side of piston body, meanwhile, the first end face of piston body
The hydraulic oil of side can also make the first opening and closing piece more reliably close the first port in first throttle duct.
According to the piston component of the present invention, piston circulating face is equal with the circulation area in the face of recovery, and symmetrical configuration, in vibration damping
During device test experiments, can reach the requirement that indicator card degree of asymmetry is less than 10；In itself there is throttle valve component on piston,
Can directly adjusting part adjusting the compression stress of whole vibroshock with recuperability it is ensured that high-speed railway is to vibration absorber of rail vehicle
Requirement.
In describing the invention it is to be understood that term " " center ", " longitudinal ", " horizontal ", " length ", " width ",
" thickness ", " on ", D score, "front", "rear", "left", "right", " vertical ", " level ", " top ", " bottom " " interior ", " outward ", " up time
The orientation of instruction such as pin ", " counterclockwise ", " axial ", " radially ", " circumferential " or position relationship be based on orientation shown in the drawings or
Position relationship, is for only for ease of the description present invention and simplifies description, rather than the device of instruction or hint indication or element must
Must have specific orientation, with specific azimuth configuration and operation, be therefore not considered as limiting the invention.
In the present invention, unless otherwise clearly defined and limited, term " installation ", " being connected ", " connection ", " fixation " etc.
Term should be interpreted broadly, for example, it may be being fixedly connected or being detachably connected or integral；Can be that machinery connects
Connect or electrically connect；Can be to be joined directly together it is also possible to be indirectly connected to by intermediary, can be in two elements
The connection in portion or the interaction relationship of two elements.For the ordinary skill in the art, can be according to concrete feelings
Condition understands above-mentioned term concrete meaning in the present invention.
In the present invention, unless otherwise clearly defined and limited, fisrt feature second feature " on " or D score permissible
It is the first and second feature directly contacts, or the first and second features pass through intermediary mediate contact.And, fisrt feature exists
Second feature " on ", " top " and " above " but fisrt feature are directly over second feature or oblique upper, or be merely representative of
Fisrt feature level height is higher than second feature.Fisrt feature second feature " under ", " lower section " and " below " can be
One feature is immediately below second feature or obliquely downward, or is merely representative of fisrt feature level height and is less than second feature.
In the description of this specification, reference term " embodiment ", " some embodiments ", " example ", " specifically show
The description of example " or " some examples " etc. means specific features, structure, material or the spy describing with reference to this embodiment or example
Point is contained at least one embodiment or the example of the present invention.And, the specific features of description, structure, material or feature
Can combine in an appropriate manner in any one or more embodiments or example.Additionally, in the case of not conflicting, this
The technical staff in field can be by the spy of the different embodiments described in this specification or example and different embodiment or example
Levy and be combined and combine.
Although embodiments of the invention have been shown and described above it is to be understood that above-described embodiment is example
Property it is impossible to be interpreted as limitation of the present invention, those of ordinary skill in the art within the scope of the invention can be to above-mentioned
Embodiment is changed, changes, replacing and modification.
Claims (8)
1. a kind of shock absorber piston assembly is it is characterised in that include
Piston body, described piston body has the centre bore along described piston body axially through described piston body, described piston body
First end face on there is the first interior annular of first port around described centre bore and around described first interior annular
First outer toroid, the second end face of described piston body has the second interior annular of second port around described centre bore and
Around the second outer toroid of described second interior annular, described piston body also have at least one first throttle duct and at least one
Second throttle orifice road, the first port at least one described first throttle duct is located in described first interior annular and at least one
The second port in described first throttle duct is located in described second outer toroid, and the first of at least one described second throttle orifice road
Port is located in described first outer toroid and the second port at least one described second throttle orifice road is located at described second inner circle
In ring；
For the first opening and closing piece of the normal first port closing at least one described first throttle duct, described first opening and closing piece sets
In the first end face of described piston body；
For the second opening and closing piece of the normal second port closing at least one described first throttle duct, described second opening and closing piece sets
In the second end face of described piston body；
For adjusting the compression stress of amortisseur and the throttle valve component of recuperability, described throttle valve component includes being sequentially connected and connects
Throttling flap, throttle valve spring and nut, described throttle valve component be arranged on described first throttle duct and described second section
In discharge orifice road.
2. shock absorber piston assembly according to claim 1 is it is characterised in that at least one described first throttle duct
Shape is identical with the shape in the second throttle orifice road at least one described, the first port at least one described first throttle duct
Shape is identical with the shape of the second port in the second throttle orifice road at least one described, at least one described first throttle duct
The shape of second port is identical with the shape of the first port in the second throttle orifice road at least one described.
3. according to the shock absorber piston assembly described in claim 2 it is characterised in that the of at least one described first throttle duct
Radial dimension in the first end face of described piston body for the Single port is more than second end at least one described first throttle duct
Radial dimension in the second end face of described piston body for the mouth, the first port at least one described first throttle duct is described
Circumferential size in the first end face of piston body is less than the second port at least one described first throttle duct in described piston
Circumferential size in the second end face of body；The first port at least one described second throttle orifice road is the first of described piston body
Radial dimension on end face is less than the second end face in described piston body for the second port at least one described second throttle orifice road
On radial dimension, the first port at least one the described second throttle orifice road circumference in the first end face of described piston body
Size is more than the circumferential size in the second end face of described piston body for the second port at least one described second throttle orifice road.
4. the shock absorber piston assembly according to any one of claim 1-3 is it is characterised in that described first throttle duct
Quantity is three with the quantity in described second throttle orifice road, and wherein, the first port in three described first throttle ducts is along institute
State the circumferential uniform intervals arrangement of the first interior annular, the second port in three described first throttle ducts is along described second outer toroid
Circumferential uniform intervals arrangement, the first port in three described second throttle orifice roads along described first outer toroid circumference uniformly between
Every arrangement, the second port in three described second throttle orifice roads is along the circumferential uniform intervals arrangement of described second interior annular.
5. shock absorber piston assembly according to claim 4 is it is characterised in that the quantity of described throttle valve component is five
Individual, it includes the first valve body being arranged in described first throttle duct, is arranged on the second valve in described second throttle orifice road
Body, the 3rd valve body and two the 4th valve bodies, the flow of wherein said 4th valve body is adjustable.
6. piston component according to claim 1 is it is characterised in that described first interior annular and described second interior annular exist
It is arranged symmetrically on described piston body, described first outer toroid is arranged symmetrically on described piston body with described second outer toroid.
7. piston component according to claim 1 is it is characterised in that also include the first backup plate and the second backup plate, and described
One backup plate with described first opening and closing piece be connected so that described first be opened and closed piece against described piston body first end face, described second
Backup plate is connected so that described second is opened and closed piece against the second end face of described piston body with the described second opening and closing piece.
8. a kind of hydraulic buffer is it is characterised in that include the shock absorber piston group according to any one of claim 1-7
Part.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611125247.1A CN106481721A (en) | 2016-12-08 | 2016-12-08 | Shock absorber piston assembly and hydraulic damper |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611125247.1A CN106481721A (en) | 2016-12-08 | 2016-12-08 | Shock absorber piston assembly and hydraulic damper |
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| Publication Number | Publication Date |
|---|---|
| CN106481721A true CN106481721A (en) | 2017-03-08 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201611125247.1A Pending CN106481721A (en) | 2016-12-08 | 2016-12-08 | Shock absorber piston assembly and hydraulic damper |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109027100A (en) * | 2018-09-26 | 2018-12-18 | 山东凌博瑞轨道交通科技有限公司 | The hydraulic buffer of variable resistance damping characteristics is realized by changing normal open hole flow |
| CN109027099A (en) * | 2018-09-26 | 2018-12-18 | 山东凌博瑞轨道交通科技有限公司 | Piston type self-adaptive damping variable hydraulic damper |
| CN109882538A (en) * | 2019-03-11 | 2019-06-14 | 杭州天铭科技股份有限公司 | Adjuster |
| CN113483049A (en) * | 2021-07-13 | 2021-10-08 | 上海工程技术大学 | Rigidity-adjustable intelligent hydraulic damper and adjusting method thereof |
| CN113983106A (en) * | 2021-11-25 | 2022-01-28 | 宁波瑞丰汽车零部件有限公司 | Low-speed flow adjustable shock absorber piston |
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| CN201047417Y (en) * | 2007-02-15 | 2008-04-16 | 株洲联诚集团减振器有限责任公司 | Throttle valve of railway oil pressure vibration damper |
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