CN208816583U - A kind of hydro-pneumatic spring - Google Patents

A kind of hydro-pneumatic spring Download PDF

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Publication number
CN208816583U
CN208816583U CN201820508287.2U CN201820508287U CN208816583U CN 208816583 U CN208816583 U CN 208816583U CN 201820508287 U CN201820508287 U CN 201820508287U CN 208816583 U CN208816583 U CN 208816583U
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piston
main
hydro
oil pocket
pneumatic spring
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Chinese (zh)
Inventor
杨帆
林德昭
赵峰
洛翔宇
马兵
谢飞
巩笛
张美娇
崔勇勇
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Huaqiao University
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Huaqiao University
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Abstract

The utility model discloses a kind of hydro-pneumatic springs, including hydraulic cylinder, main piston;It is equipped with the cylindricality oil pocket filled with hydraulic oil in institute's hydraulic cylinder, the main piston is movably installed in the hydraulic cylinder, and the hydraulic cylinder is separated for main oil pocket and annular oil cavity two parts, and main oil pocket is connected with annular oil cavity by damping hole;The inside of the main piston is equipped with cylindrical cavity, which is divided into piston air cavity and piston oil pocket by a floating piston, and the piston oil pocket is connected with the main oil pocket.The utility model provides a kind of hydro-pneumatic spring for optimizing buffer structure, improves buffer structure, simplifies the structure arrangement of hydro-pneumatic spring system, is conducive to the cramped construction design of system.

Description

A kind of hydro-pneumatic spring
Technical field
The utility model relates to damper system technical fields, more particularly to a kind of oil gas bullet for optimizing buffer structure Spring.
Background technique
Hydro-pneumatic spring is a kind of mechanical component for being damped using oil pressure and realizing buffering, is widely used in the suspension system of vehicle In.Hydro-pneumatic spring is as the critical elements of bearing capacity and damping shock absorption are provided in suspension system, the design of hydro-pneumatic spring is always It is the emphasis of suspension system designs.
Hydro-pneumatic spring transmits pressure, using inert gas as elastic fluid, internal restriction, check valve etc. with hydraulic oil Instead of common pivotal connection, hydro-pneumatic spring is made to integrate elastic element and damper function, radial dimension is small, to whole The arrangement of vehicle is advantageous.Hydro-pneumatic spring has nonlinear stiffness characteristic and nonlinear dampling characteristic simultaneously, can improve vehicle one As form ride comfort on road surface, and biggish rigidity can be provided on macrorelief road surface, keep the driving posture of vehicle.
But due to traditional hydro-pneumatic spring mode plug-in using gas energy storage device mostly, this arragement construction meeting Increase more appurtenances, including air bag, connecting pipe etc., this structure degree of forming is low, is unfavorable for compact type design; It is relatively high to the sealing performance requirement between each component simultaneously, cause the manufacturing cost of system relatively high.
Utility model content
The purpose of the utility model is to overcome the deficiencies of the prior art, provide a kind of oil gas bullet for optimizing buffer structure Spring improves buffer structure, simplifies the structure arrangement of hydro-pneumatic spring system, is conducive to the cramped construction design of system.
The technical scheme adopted by the utility model to solve the technical problem is as follows:
A kind of hydro-pneumatic spring, including hydraulic cylinder, main piston;The cylindricality oil pocket filled with hydraulic oil is equipped in institute's hydraulic cylinder, The main piston is movably installed in the hydraulic cylinder, and the hydraulic cylinder is separated for main oil pocket and annular oil cavity two parts, and main oil Chamber is connected with annular oil cavity by damping hole;The inside of the main piston is equipped with cylindrical cavity, and the cylindrical cavity is floating by one Piston is divided into piston air cavity and piston oil pocket, and the piston oil pocket is connected with the main oil pocket.
As a preference, the main piston is equipped with along main oil pocket to the check valve of annular oil cavity one-way conduction.
As a preference, the piston air cavity, annular oil cavity and main oil pocket are respectively equipped with pressure sensor.
As a preference, the cylindrical cavity is equipped with flange step used for positioning, the minimum fortune of the floating piston Dynamic position is limited by the flange step.
As a preference, the main piston is equipped with throttle orifice, the piston oil pocket and the main oil pocket pass through the throttling Hole is connected.
As a preference, the piston air cavity fills high pressure nitrogen.
As a preference, the bottom of the hydraulic cylinder is equipped with lower mounting flange, the top of the main piston is equipped with upper Mounting flange.
As a preference, the sealing part of the hydraulic cylinder is equipped with sealing guiding mechanism.
The beneficial effects of the utility model are:
1, the solid piston bar in traditional oleo-pneumatic suspension is designed to cylindrical cavity, and makes the cylindrical cavity and main oil Air cavity is embedded in hydro-pneumatic spring rod end chamber compared to traditional external energy storage type hydro-pneumatic spring, reduces chamber by chamber connection The quantity and external add-in component of room simplify the structure arrangement of hydro-pneumatic spring system, are conducive to the cramped construction design of system.
2, main piston Integration Design is provided with check valve and throttle orifice on hydro-pneumatic spring main piston, provides non-linear Damping characteristic realizes shock absorber effect;Design has flange step on main piston simultaneously, and limitation floating piston does not depart from hollow piston Bar movement, guarantees the initial inflation process volume of air cavity.
3, since the work instantaneous pressure of each chamber can be by external pressure sensor monitoring, to realize suspension The data that active control provides are supported.
The utility model is described in further detail with reference to the accompanying drawings and embodiments;But a kind of oil of the utility model Gas spring is not limited to the embodiment.
Detailed description of the invention
Fig. 1 is the overall structure diagram of the utility model;
Fig. 2 is the side view of the main piston of the utility model;
Fig. 3 is the end view drawing of the main piston of the utility model.
Specific embodiment
Embodiment:
It is shown in Figure 1, a kind of hydro-pneumatic spring of the utility model, including hydraulic cylinder 13, main piston 7;Institute's hydraulic cylinder 13 Interior to be equipped with the cylindricality oil pocket filled with hydraulic oil, the main piston 7 is movably installed in the hydraulic cylinder 13, and by the hydraulic cylinder 13 Separating is 22 two parts of main oil pocket 33 and annular oil cavity, and main oil pocket 33 is connected with annular oil cavity 22 by damping hole;It is described The inside of main piston 7 is equipped with cylindrical cavity, which is divided into piston air cavity 11 and piston oil by a floating piston 8 Chamber, the piston oil pocket are connected with the main oil pocket 33.
The main piston 7 is equipped with along main oil pocket 33 to the check valve 4 of 22 one-way conduction of annular oil cavity.The piston air cavity 11, annular oil cavity 22 and main oil pocket 33 are respectively equipped with pressure sensor 6.The cylindrical cavity is equipped with flange step used for positioning 14, the minimum movement position of the floating piston 8 is limited by the flange step 14.
The main piston 7 is equipped with throttle orifice 9, the piston oil pocket and the main oil pocket 33 and is connected by the throttle orifice 9. The air cavity 11 fills high pressure nitrogen.The bottom of the hydraulic cylinder 13 is equipped with lower mounting flange 12.The top of the main piston 7 Equipped with upper mounting flange 11.
The interconnected relationship of each building block is as follows:
The main oil pocket 3 of hydraulic cylinder 13 is connected to annular oil cavity 2 by the damper valves that throttle orifice 9 and check valve 4 form;It is hollow 7 inner cavity of main piston is divided into oil pocket and air cavity 1 by floating piston 8, while oil pocket is directly connected to main oil pocket 3.Therefore, entire oil Gas spring system is separated into three chambers, compared with traditional hydro-pneumatic spring, chamber quantity by main piston 7 and floating piston 8 It is less, reduce the structural complexity of hydro-pneumatic spring.
The specific working principle is as follows for the utility model:
Vehicle is during traveling, as the fluctuating vehicle body on road surface also can be with up and down motion.When main piston 7 and main work When filling in the contraction of 7 opposing hydraulic cylinders 13, the oil liquid volume volume of main 3 reduction of oil pocket is greater than the volume that annular oil cavity 2 increases, therefore oily Liquid is by squeezing the gas in the compression air cavity 1 of floating piston 8, and check valve 4 is opened at this time, and main piston 7 is opposite with 7 component of main piston The damping force that hydraulic cylinder for working 13 is subject to when moving is smaller, this is equivalent to the effect of the spring in traditional suspension;When piston cylinder phase When stretching to hydraulic cylinder 13, the volume that main oil pocket 3 increases is greater than the volume of 2 reduction of annular oil cavity, therefore 1 volume of air cavity is multiple Original, oil liquid flow back to main oil pocket 3, and check valve 4 is closed at this time, the damping that main piston 7 and piston component are subject to when moving with respect to cylinder barrel Power is larger, this is equivalent to the effect of the damper in traditional suspension.By the effect of check valve 4, it is suspended on compression and stretching travel It is middle to generate asymmetric damping force, preferably alleviate the vibration of vehicle body, improves the stationarity of vehicle under steam.It is compressing and is drawing The work instant pressure of each chamber during stretching can be monitored by external pressure sensor 6.
The specific control process of the utility model is as follows:
When the vehicle is running, road surface, which rises and falls, causes main piston 7 and main piston 7 to move above and below in cylinder barrel, in this way, makes to lead The oil liquid of oil pocket 3 and annular oil cavity 2 reciprocally passes through 4 hole of damping hole and check valve on main piston 7 under the action of pressure difference, Oil liquid with pressure difference consumes energy when flowing through 4 hole of damping hole and check valve, and the vibration for automobile of decaying, this process is formed The damping characteristic of hydro-pneumatic suspension system.And the high pressure nitrogen full of sealing in air cavity 1, the bullet generated by the compression of high pressure nitrogen Property power bear load, buffering ground faces the impact of vehicle, this process is formed the elastic characteristic of hydro-pneumatic suspension system.
In conclusion the design focal point of the utility model is:
A kind of hydro-pneumatic spring of the utility model saves traditional oil gas hanging by changing the inner space of traditional main piston 7 The external accumulator hung reduces the quantity of chamber, so that system on the basis of realizing the basic function of traditional hydro-pneumatic spring Structure is more simplified and compact.Damping hole is reciprocated through under the action of pressure difference by oil liquid in oil pocket and check valve 4 generates The vibration of different damping force decaying automobiles is full of high pressure nitrogen in the air cavity 1 built in another aspect, in the up and down motion of suspension In bear load by the flexible deformation of nitrogen, alleviate impact.By the connection for optimizing the gentle body of hydro-pneumatic spring system oil liquid Relationship reduces the quantity of system chamber, not only simplifies the structure of hydro-pneumatic spring system, while the work of each chamber is instantaneously pressed Power can be monitored by external pressure sensor 6, realize that active control provides data and supports for suspension.
Above-described embodiment only is used to further illustrate a kind of hydro-pneumatic spring of the utility model, but the utility model not office It is limited to embodiment, any simple modification, equally change made by the above technical examples according to the technical essence of the present invention Change and modify, each falls in the protection scope of technical solutions of the utility model.

Claims (8)

1. a kind of hydro-pneumatic spring, it is characterised in that: including hydraulic cylinder, main piston;It is equipped in institute's hydraulic cylinder filled with hydraulic oil Cylindricality oil pocket, the main piston is movably installed in the hydraulic cylinder, and the hydraulic cylinder is separated for main oil pocket and annular oil cavity two Point, and main oil pocket is connected with annular oil cavity by damping hole;The inside of the main piston is equipped with cylindrical cavity, the cylindrical cavity Piston air cavity and piston oil pocket are divided by a floating piston, and the piston oil pocket is connected with the main oil pocket.
2. a kind of hydro-pneumatic spring according to claim 1, it is characterised in that: the main piston is equipped with along main oil pocket to annular The check valve of oil pocket one-way conduction.
3. a kind of hydro-pneumatic spring according to claim 1, it is characterised in that: the piston air cavity, annular oil cavity and main oil Chamber is respectively equipped with pressure sensor.
4. a kind of hydro-pneumatic spring according to claim 1, it is characterised in that: the cylindrical cavity is equipped with used for positioning convex The minimum movement position of edge platform rank, the floating piston is limited by the flange step.
5. a kind of hydro-pneumatic spring according to claim 1, it is characterised in that: the main piston is equipped with throttle orifice, the work Plug oil pocket is connected with the main oil pocket by the throttle orifice.
6. a kind of hydro-pneumatic spring according to claim 1, it is characterised in that: the piston air cavity fills high pressure nitrogen.
7. a kind of hydro-pneumatic spring according to claim 1, it is characterised in that: the bottom of the hydraulic cylinder is equipped with lower Method for Installation The top of blue disk, the main piston is equipped with upper mounting flange.
8. a kind of hydro-pneumatic spring according to claim 1, it is characterised in that: the sealing part of the hydraulic cylinder is equipped with sealing and leads To mechanism.
CN201820508287.2U 2018-04-11 2018-04-11 A kind of hydro-pneumatic spring Active CN208816583U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201820508287.2U CN208816583U (en) 2018-04-11 2018-04-11 A kind of hydro-pneumatic spring

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201820508287.2U CN208816583U (en) 2018-04-11 2018-04-11 A kind of hydro-pneumatic spring

Publications (1)

Publication Number Publication Date
CN208816583U true CN208816583U (en) 2019-05-03

Family

ID=66268163

Family Applications (1)

Application Number Title Priority Date Filing Date
CN201820508287.2U Active CN208816583U (en) 2018-04-11 2018-04-11 A kind of hydro-pneumatic spring

Country Status (1)

Country Link
CN (1) CN208816583U (en)

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