阅读说明：本技术 四腔油气缓冲结构 (Four-cavity oil gas buffering structure ) 是由 杨明 杨敦朋 杨小琛 于 2021-08-09 设计创作，主要内容包括：本发明涉及油气弹簧结构技术领域,尤其涉及四腔油气缓冲结构,包括缸筒,缸筒的顶部的内圈固定有导向套,导向套的内圈活动设有竖直的活塞杆,活塞杆的底端固定有活塞,活塞活动设于缸筒的内圈,活塞的内圈设置有压盖,活塞杆的内圈活动设有浮动活塞。本发明采用四腔缓冲结构,提高了行车过程的稳定性和安全性,实现压缩变刚度缓冲、带阻柔性回弹,提高了乘坐舒适性,采用油气分离的密封结构,消除了油液被乳化的风险,功能发挥更加稳定可靠,可延长油气弹簧使用寿命,可做到长期免维护,降低了维护成本,浮动活塞的材料选用铝合金材质,提高了缓冲反应灵敏度,更加适应减速带等路面。(The invention relates to the technical field of hydro-pneumatic spring structures, in particular to a four-cavity hydro-pneumatic buffering structure which comprises a cylinder barrel, wherein a guide sleeve is fixed on an inner ring at the top of the cylinder barrel, a vertical piston rod is movably arranged on the inner ring of the guide sleeve, a piston is fixed at the bottom end of the piston rod, the piston is movably arranged on the inner ring of the cylinder barrel, a gland is arranged on the inner ring of the piston, and a floating piston is movably arranged on the inner ring of the piston rod. The four-cavity buffer structure is adopted, stability and safety in the driving process are improved, compression variable-stiffness buffering and band-stop flexible rebounding are achieved, riding comfort is improved, the risk of oil emulsification is eliminated due to the adoption of the oil-gas separation sealing structure, functions are more stable and reliable, the service life of an oil-gas spring can be prolonged, long-term maintenance-free performance is achieved, maintenance cost is reduced, the floating piston is made of aluminum alloy materials, buffering reaction sensitivity is improved, and the four-cavity buffer structure is more suitable for roads such as deceleration strips.)

1. Four chamber oil gas buffer structure, including cylinder (16), its characterized in that: the inner circle at the top of cylinder (16) is fixed with uide bushing (24), the inner circle activity of uide bushing (24) is equipped with vertical piston rod (18), the bottom mounting of piston rod (18) has piston (14), piston (14) activity is located the inner circle of cylinder (16), the inner circle of piston (14) is provided with gland (15), the inner circle activity of piston rod (18) is equipped with floating piston (9).

2. The four-chamber hydrocarbon buffer structure of claim 1, wherein: the inner cavity of the cylinder barrel (16) is divided into an A cavity (20) and a B cavity (21) through the piston (14) and the gland (15).

3. The four-chamber hydrocarbon buffer structure of claim 1, wherein: the inner cavity of the piston rod (18) is divided into a C cavity (22) and a D cavity (23) through the floating piston (9).

4. The four-chamber hydrocarbon buffer structure of claim 1, wherein: a first support lug (17) is fixed at the bottom end of the cylinder barrel (16), and a second support lug (19) is fixed at the top end of the piston rod (18) and extends to the upper side of the cylinder barrel (16).

5. The four-chamber hydrocarbon buffer structure of claim 1, wherein: the bottom of uide bushing (24) is provided with packing ring (5), the inner circle of uide bushing (24) has set gradually dust ring (1), for the axle supporting ring (2) and steckel seal (4), the outer lane of uide bushing (24) is provided with O shape circle (3).

6. The four-chamber hydrocarbon buffer structure of claim 1, wherein: and a second hole supporting ring (13) is arranged on the outer ring of the piston (14), and a plug (10), a spring (11) and a steel ball (12) are sequentially arranged on one side of the piston (14).

7. The four-chamber hydrocarbon buffer structure of claim 1, wherein: the floating piston (9) is made of aluminum alloy, and the outer ring of the floating piston (9) is sequentially provided with a first hole supporting ring (6), a piston dynamic seal (7) and a Glare ring (8).

Technical Field

The invention relates to the technical field of hydro-pneumatic spring structures, in particular to a four-cavity hydro-pneumatic buffering structure.

Background

The hydro-pneumatic suspension, namely a hydro-pneumatic spring suspension, is a suspension device adopting a hydro-pneumatic spring. The hydro-pneumatic suspension is mainly applied to military special vehicles and engineering vehicles, the trend of hydro-pneumatic damping military rotation to civilian has been shown along with the requirements of the market and the society, and the hydro-pneumatic suspension is preferably selected to replace a steel plate spring structure in the suspension of many civil heavy vehicles. The hydro-pneumatic spring is a device which is filled with compressed gas and oil liquid in a closed container and realizes the spring action by utilizing the compressibility of the gas. The hydro-pneumatic spring uses inert gas as elastic medium and oil as force transmission medium, and is generally composed of a gas spring and a hydraulic cylinder equivalent to a hydraulic shock absorber.

The principle of an oil-gas mixing structure of an existing oil-gas spring is that high-pressure nitrogen is mixed with oil, the nitrogen is used as an elastic medium, the oil is used as a force transmission medium, a nitrogen cavity is arranged at the lower part and an oil cavity is arranged at the upper part, the oil is directly contacted with the nitrogen, and after long-time work, the nitrogen is blended into the oil, so that the oil is emulsified, the pressure of the nitrogen cavity is reduced, the elasticity is insufficient, the buffering effect is lost, a user needs to perform irregular maintenance, and the maintenance cost is high; the oil-gas mixing structure of the existing oil-gas spring adopts two-cavity buffering, a piston rod stretches out and compresses, oil directly circulates through a throttling hole, so that the buffering becomes hard, the riding feeling is poor, and therefore a four-cavity oil-gas buffering structure is provided.

Disclosure of Invention

Aiming at the defects of the prior art, the invention provides a hydro-pneumatic spring sealing structure, which overcomes the defects of the prior art and aims to solve the problems in the background art.

In order to achieve the purpose, the invention provides the following technical scheme: the four-cavity oil-gas buffering structure comprises a cylinder barrel, wherein a guide sleeve is fixed on an inner ring at the top of the cylinder barrel, a vertical piston rod is movably arranged on the inner ring of the guide sleeve, a piston is fixed at the bottom end of the piston rod, the piston is movably arranged on the inner ring of the cylinder barrel, a gland is arranged on the inner ring of the piston, and a floating piston is movably arranged on the inner ring of the piston rod.

As a preferred technical scheme of the invention, the inner cavity of the cylinder barrel is divided into an A cavity and a B cavity by the piston and the gland.

As a preferable technical solution of the present invention, the inner cavity of the piston rod is partitioned into a C-cavity and a D-cavity by the floating piston.

As a preferable technical scheme of the invention, a first support lug is fixed at the bottom end of the cylinder barrel, and a second support lug is fixed at the top end of the piston rod, which extends to the upper side of the cylinder barrel.

As a preferable technical scheme of the invention, the bottom end of the guide sleeve is provided with a gasket, the inner ring of the guide sleeve is sequentially provided with a dust ring, a supporting ring for a shaft and a Stent seal, and the outer ring of the guide sleeve is provided with an O-shaped ring.

As a preferred technical scheme of the invention, the floating piston is made of aluminum alloy, the outer ring of the piston is provided with a supporting ring for the second hole, and one side of the piston is sequentially provided with a plug, a spring and a steel ball.

As a preferable technical scheme of the invention, the outer ring of the floating piston is sequentially provided with a supporting ring for a first hole, a piston dynamic seal and a Glare ring.

Compared with the prior art, the invention has the beneficial effects that:

the four-cavity buffer structure is adopted, so that the stability and the safety of the driving process are improved, the compression variable-rigidity buffer and the band-resistance flexible rebound are realized, and the riding comfort is improved.

The invention adopts the oil-gas separation sealing structure, eliminates the risk of oil being emulsified, has more stable and reliable function, can prolong the service life of the oil-gas spring, can realize long-term maintenance-free and reduces the maintenance cost.

The floating piston is made of aluminum alloy, so that the buffering reaction sensitivity is improved, and the floating piston is more suitable for roads such as deceleration strips.

Drawings

FIG. 1 is a schematic structural diagram of the present invention.

Description of reference numerals:

1. a dust ring; 2. a support ring for the shaft; 3. an O-shaped ring; 4. performing steckel; 5. a gasket; 6. a support ring for the first hole; 7. the piston is in dynamic seal; 8. a Glare circle; 9. a floating piston; 10. plugging by screwing; 11. a spring; 12. a steel ball; 13. a support ring for the second hole; 14. a piston; 15. a gland; 16. a cylinder barrel; 17. a first lug; 18. a piston rod; 19. a second lug; 20. a cavity A; 21. a cavity B; 22. a cavity C; 23. a cavity D; 24. and a guide sleeve.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

Referring to fig. 1, the four-chamber oil-gas buffering structure includes a cylinder 16, a guide sleeve 24 is fixed to an inner ring of the top of the cylinder 16, a vertical piston rod 18 is movably arranged on the inner ring of the guide sleeve 24, a piston 14 is fixed to the bottom end of the piston rod 18, the piston 14 is movably arranged on the inner ring of the cylinder 16, a gland 15 is arranged on the inner ring of the piston 14, a floating piston 9 is movably arranged on the inner ring of the piston rod 18, an inner chamber of the cylinder 16 is divided into an a chamber 20 and a B chamber 21 by the piston 14 and the gland 15, the inner chamber of the piston rod 18 is divided into a C chamber 22 and a D chamber 23 by the floating piston 9, the a chamber 20, the B chamber 21 and the C chamber 22 are all closed oil-liquid chambers, the D chamber 23 is a closed high-pressure gas (nitrogen) chamber, one-way valves and normally-open orifices are arranged between the a chamber 20 and the B chamber 21, and the B chamber 21 and the C chamber 22, so that oil can freely flow from the a chamber 20 to the B chamber 21, and the C chamber 22; on the contrary, when the oil flows from the B chamber 21 to the a chamber 20 and the C chamber 22 to the B chamber 21, the check valve is closed and the oil flows out only through the orifice. When a load exists, the piston rod 18 is compressed, oil flows from the cavity A20 to the cavity B21, and the cavity B21 to the cavity C22, the two check valves are designed to have different opening pressures, so that the segmented variable stiffness buffering is realized in the compression process, and the stiffness curve is smoother; when the load disappears, the piston rod 18 extends out, the high-pressure gas rebounds, the oil flows from the cavity B21 to the cavity A20, the cavity C22 to the cavity B21 to return to form resistance, the hydro-pneumatic spring realizes flexible rebound resistance, discomfort of riding dizziness, weightlessness and the like of drivers and passengers caused by too high rebound speed of the hydro-pneumatic spring is reduced, and meanwhile, the safety of the whole vehicle is improved; two sets of one-way throttling structures are adopted, and the two sets of one-way valves with different opening pressures act on the whole buffering process, so that the rigidity curve of the whole buffering process is smoother, and the riding comfort is improved.

Specifically, referring to fig. 1, a first lug 17 is fixed at the bottom end of the cylinder 16, and a second lug 19 is fixed at the top end of the piston rod 18 extending to the upper side of the cylinder 16, so that the hydro-pneumatic spring is convenient to mount.

Specifically, referring to fig. 1, a gasket 5 is arranged at the bottom end of a guide sleeve 24, a dust ring 1, a bearing ring 2 for a shaft and a steckel seal 4 are sequentially arranged at an inner ring of the guide sleeve 24, an O-ring 3 is arranged at an outer ring of the guide sleeve 24, a bearing ring 13 for a second hole is arranged at an outer ring of a piston 14, a plug 10, a spring 11 and a steel ball 12 are sequentially arranged at one side of the piston 14, a floating piston 9 is made of an aluminum alloy material, a bearing ring 6 for a first hole, a piston dynamic seal 7 and a glade ring 8 are sequentially arranged at an outer ring of the floating piston 9, the glade ring 8 is low in friction force, small in starting force and high-pressure resistant, and an oil-gas separation sealing structure is adopted, so that the risk of oil being emulsified is eliminated, the function is more stably and reliably exerted, the service life of an oil-gas spring can be prolonged, and the maintenance cost is reduced; the floating piston 9 is made of aluminum alloy, so that the weight is light, the buffering response sensitivity can be improved, and the floating piston is more suitable for road surfaces such as deceleration strips.

The working principle is as follows: a four-cavity buffer structure is adopted, in the compression process, oil in the cavity B21 is extruded to the cavity A20 and the cavity C22 by load, when the pressure of the cavity A20 is greater than the pressure of the cavity D23, the floating piston 9 moves upwards to compress the cavity D23 until the pressures of the four cavities are balanced; when the load disappears, and the pressure of the D cavity 23 is greater than that of the other three cavities, the floating piston 9 moves downwards, the one-way valve is closed, oil only flows back through the throttling hole, the rebound damping force is increased, the flexible rebound effect is more prominent, and the stability and the safety of the driving process are improved.

Finally, it should be noted that: in the description of the present invention, it should be noted that the terms "vertical", "upper", "lower", "horizontal", and the like indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience of describing the present invention and simplifying the description, but do not indicate or imply that the referred device or element must have a specific orientation, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the present invention.

In the description of the present invention, it should also be noted that, unless otherwise explicitly specified or limited, the terms "disposed," "mounted," "connected," and "connected" are to be construed broadly and may, for example, be fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.

Although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that changes may be made in the embodiments and/or equivalents thereof without departing from the spirit and scope of the invention. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.