CN218266965U

CN218266965U - Double-layer single-cylinder shock absorber

Info

Publication number: CN218266965U
Application number: CN202222311476.XU
Authority: CN
Inventors: 冯美菊; 郑念华; 叶祥忠; 林宝德
Original assignee: Add Industry Zhejiang Corp ltd
Current assignee: Add Industry Zhejiang Corp ltd
Priority date: 2022-08-31
Filing date: 2022-08-31
Publication date: 2023-01-10
Anticipated expiration: 2032-08-31

Abstract

The utility model discloses a double-deck single cylinder shock absorber relates to automobile shock absorber technical field, including cup jointing urceolus and the inner tube that forms, the equal sealing connection of one end of urceolus and inner tube has the bottom, the other end of urceolus and inner tube is connected with director and piston rod, equal sealing connection of director and urceolus and director and inner tube, the piston rod is provided with the sealing member with the equal sliding connection of director and piston rod and inner tube, sliding connection department all cooperates and is provided with the sealing member, be the air storage chamber between urceolus and the inner tube, the inside oil reservoir that is of inner tube, the one end side that is close to the bottom of inner tube is equipped with the intercommunicating pore, the outside of inner tube is equipped with floating piston, the tip of piston rod is equipped with the piston valve with inner tube inner wall sliding connection, be equipped with the oilhole in the piston valve. The utility model discloses can install into floating piston when the fuselage is shorter, avoid the fuselage overlength to lead to the installation inconvenient, simple structure does not need additionally to increase gaseous loading annex, and the manufacturing cost is lower with the production degree of difficulty.

Description

Double-layer single-cylinder shock absorber

Technical Field

The utility model relates to an automobile shock absorber technical field, concretely relates to double-deck single cylinder shock absorber.

Background

In order to quickly attenuate the vibration of a frame and a vehicle body and improve the smoothness and comfort of the running of an automobile, a shock absorber is generally arranged on an automobile suspension system, and a bidirectional cylinder type shock absorber is widely adopted on the automobile. The shock absorber is a vulnerable part in the use process of the automobile, and the good working of the shock absorber directly influences the running stability of the automobile and the service life of other parts, so that the shock absorber is always in a good working state. The floating piston mounting position of a common single-cylinder shock absorber is mounted in the same working cavity together with a piston rod assembly, all working components are concentrated in the same working cavity, so that the body is longer, the loading size and the working size have certain conflict, and the space volume in the working cavity is limited and the gas volume is small, so that the larger refuting force is difficult to realize by using compressed gas and the effect of higher gas damping is achieved; the other type is that an additional gas loading accessory is added outside the body of the shock absorber, the floating piston is installed in a working cavity of the accessory, the production difficulty and the cost of the shock absorber additionally added with the gas loading accessory are high, and certain interference risks exist during loading and using.

SUMMERY OF THE UTILITY MODEL

1. Technical problem to be solved by the utility model

One kind is installed to current single cylinder shock absorber floating piston and is leading to fuselage overlength, installation inconvenient with the piston rod assembly in same working chamber, and another kind needs additionally to increase the gaseous accessory that loads, the technical problem of cost and the increase of the production degree of difficulty, the utility model provides a double-deck single cylinder shock absorber, it can install into floating piston when the fuselage is shorter, avoids the fuselage overlength to lead to installing inconvenient, and simple structure does not need additionally to increase the gaseous accessory that loads, and manufacturing cost and the production degree of difficulty are lower.

2. Technical scheme

In order to solve the above problem, the utility model provides a technical scheme does:

the double-layer single-cylinder shock absorber comprises an outer cylinder and an inner cylinder which are formed in a sleeved mode, wherein a bottom cover is connected to one end of the outer cylinder and one end of the inner cylinder in a sealing mode, a guider and a piston rod are connected to the other end of the outer cylinder and the other end of the inner cylinder, the guider and the outer cylinder and the guider and the inner cylinder are connected in a sealing mode, the piston rod and the guider and the piston rod and the inner cylinder are connected in a sliding mode, sealing parts are arranged at the sliding connection positions in a matched mode, an air storage cavity is formed between the outer cylinder and the inner cylinder, an oil storage cavity is formed inside the inner cylinder, a communicating hole is formed in the side face, close to the bottom cover, of one end of the inner cylinder, a floating piston is arranged on the outer side of the inner cylinder and located between the communicating hole and the guider, a piston valve is arranged at the end portion of the piston rod and connected with the inner wall of the inner cylinder in a sliding mode, and an oil passing hole is formed in the piston valve.

Optionally, the oil passing hole is communicated with spaces on two sides of the piston valve, and the oil passing hole is bent.

Optionally, a one-way air inlet nozzle is arranged at the extending end of the piston rod and connected to the air storage cavity.

Optionally, the unidirectional air inlet nozzle is internally provided with an air hole, a pressing block, an air blocking elastic element and a sealing ring, the air hole and the pressing block are arranged in a matched and opposite mode, the pressing block is connected to one side of the air storage cavity in a sliding mode, the air blocking elastic element is connected with the pressing block and the volume of the unidirectional air inlet nozzle on one side of the air storage cavity, and a space where the pressing block is located is provided with a plurality of fine holes communicated with the air storage cavity.

Optionally, the floating piston is ring-shaped, and a plurality of symmetrically arranged sealing grooves are formed in the inner wall and the outer wall of the floating piston.

Optionally, a flat groove is arranged between the sealing grooves on the same side wall.

Optionally, the gas storage cavity stores compressed gas.

Optionally, the piston rod is provided with two limit nuts which are in limit fit with the guider, and the two limit nuts are screwed together.

3. Advantageous effects

Adopt the technical scheme provided by the utility model, compare with prior art, have following beneficial effect:

the technical scheme provided by the utility model has set up the similar interior outer cylinder structure of double-cylinder shock absorber, and drill on the inner tube and realize inner cylinder chamber and outer cylinder chamber bottom intercommunication, and assemble floating piston at the intercommunication department, utilize compressed gas to realize bigger refute power, reach the effect of higher gas damping, install floating piston in the short while of fuselage simultaneously, avoid the fuselage overlength to lead to the installation inconvenient, simple structure, do not need additionally to increase the gas and load the annex, manufacturing cost and production degree of difficulty are lower, have greatly improved the performance of enterprises; furthermore, the guider is provided with a one-way air inlet nozzle for air inflation, so that the air inflation is simpler and more convenient, and the production cost is lower.

Drawings

Fig. 1 is a schematic cross-sectional view of a double-layer single-cylinder shock absorber according to an embodiment of the present invention.

Fig. 2 is an oil path schematic diagram of a double-layer single-cylinder shock absorber according to an embodiment of the present invention.

Fig. 3 is a schematic cross-sectional structure view of a one-way intake nozzle of a double-layer single-cylinder shock absorber according to an embodiment of the present invention.

1. A piston rod; 2. an outer cylinder; 3. an inner barrel; 4. a bottom cover; 5. an oil storage chamber; 6. an air storage cavity; 7. a floating piston; 8. a communicating hole; 9. a piston valve; 10. a guide; 11. a one-way air inlet nozzle; 12. oil liquid moving holes; 13. air holes; 14. pressing into blocks; 15. a seal ring; 16. a gas barrier elastic member; 17. and (5) fine pores.

Detailed Description

For a further understanding of the present invention, reference will be made to the following detailed description taken in conjunction with the accompanying drawings and examples.

The present application will be described in further detail with reference to the following drawings and examples. It is to be understood that the specific embodiments described herein are merely illustrative of the relevant invention and are not limiting of the invention. It should be noted that, for convenience of description, only the portions related to the present invention are shown in the drawings. The utility model discloses in words such as first, second, be for the description the utility model discloses a technical scheme is convenient and set up, and does not have specific limiting action, is general finger, right the technical scheme of the utility model does not constitute limiting action. It should be noted that the embodiments and features of the embodiments in the present application may be combined with each other without conflict. In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplification of description, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance. Unless expressly stated or limited otherwise, the terms "mounted," "connected," and "connected" are intended to be inclusive and mean, for example, that they may 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 meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art. The technical solutions in the same embodiment and between the technical solutions in different embodiments can be arranged and combined to form a new technical solution without contradiction or conflict, which is all within the scope of the present invention.

Examples

With reference to fig. 1-3, a double-layer single-cylinder shock absorber includes an outer cylinder 2 and an inner cylinder 3 which are sleeved together, one end of each of the outer cylinder 2 and the inner cylinder 3 is hermetically connected with a bottom cover 4, the other end of each of the outer cylinder 2 and the inner cylinder 3 is connected with a guider 10 and a piston rod 1, the guider 10 is hermetically connected with the outer cylinder 2 and the guider 10 is hermetically connected with the inner cylinder 3, the piston rod 1 is slidably connected with the guider 10 and the piston rod 1 is slidably connected with the inner cylinder 3, a sealing member is cooperatively arranged at the sliding connection position, an air storage chamber 6 is arranged between the outer cylinder 2 and the inner cylinder 3, an oil storage chamber 5 is arranged inside the inner cylinder 3, a communication hole 8 is arranged on one side surface of the inner cylinder 3 close to the bottom cover 4, a floating piston 7 is arranged on the outer side of the inner cylinder 3, the floating piston 7 is arranged between the communication hole 8 and the guider 10, a piston valve 9 slidably connected with the inner wall of the inner cylinder 3 is arranged at the end of the piston rod 1, and an oil hole is arranged in the piston valve 9.

The utility model discloses an on the basis of conventional double-cylinder shock absorber, cancel compression acting valve, and realize inner tube 3 chambeies and 2 chamber bottoms intercommunications of urceolus through drilling on inner tube 3, assemble floating piston 7 in intercommunication department, utilize compressed gas to realize bigger refute power, reach higher gas damping's effect, install floating piston 7 simultaneously in the fuselage is shorter, it leads to the installation inconvenient to avoid the fuselage overlength, moreover, the steam generator is simple in structure, do not need additionally to increase the gas loading annex, the manufacturing cost is lower with the production degree of difficulty, the performance of enterprises is greatly improved. On the premise that the size and the shape of the conventional single-cylinder shock absorber are not changed, the double-layer single-cylinder shock absorber can utilize compressed gas to realize larger refuting force and achieve higher air damping. The piston rod 1 and the piston valve 9 slide in the inner cylinder 3, vibration is transmitted by the piston rod 1, after the piston rod 1 and the piston valve 9 slide, oil in the oil storage cavity 5 passes through the oil through holes to the other side of the piston valve 9, damping force is generated in the process, the motion of the piston rod 1 and the piston valve 9 is buffered, meanwhile, the oil in the oil storage cavity 5 enters a space between the outer cylinder 2 and the inner cylinder 3 through the communication holes 8, the floating piston 7 is pushed, compressed air in the air storage cavity 6 is compressed, the damping force is generated, and vibration is further reduced. As shown in fig. 2, A, B, C indicates the direction of movement of the oil path in which the piston rod is pressed into the inner cylinder. The structure can be used for high-refuting-force inflation, the refuting force is less than or equal to 1800N, and the refuting force of the conventional single-cylinder shock absorber is generally less than or equal to 800N.

The oil passing holes are communicated with the spaces on the two sides of the piston valve 9 and are bent, so that compared with straight-through holes, the resistance of oil passing through the oil passing holes is larger, and larger damping force can be obtained.

The one-way air inlet nozzle 11 is positioned at the extending end of the piston rod 1. In this embodiment, a one-way nozzle 11 for inflation is located on the guide 10, and the one-way nozzle 11 is connected to the air storage chamber 6. An air hole 13, a pressing block 14, an air blocking elastic element 16 and a sealing ring 15 are arranged in the one-way air inlet nozzle 11, the air hole 13 and the pressing block 14 are arranged in a matched and opposite mode, the pressing block 14 is connected to one side of the air storage cavity 6 in a sliding mode, the air blocking elastic element 16 is connected with the pressing block 14 and the volume of the one-way air inlet nozzle 11 on one side of the air storage cavity 6, and a space where the pressing block 14 is located is provided with a plurality of fine holes 17 communicated with the air storage cavity 6. A one-way air nozzle is additionally arranged on the guider 10, and compressed air is injected into the working cavity through the air nozzle after the whole assembly of the shock absorber is finished, so that the inflation is simpler and more convenient, and the production cost is lower.

The floating piston 7 is annular, and a plurality of symmetrically arranged sealing grooves are formed in the inner wall and the outer wall of the floating piston 7. And a flat groove is arranged between the sealing grooves on the same side wall. The sealing groove is used for installing a sealing ring 15, the thin part of the floating piston 7 is formed at the flat groove and does not contact the inner cylinder 3 and the outer cylinder 2, and all pressure is concentrated at the sealing ring 15, so that the sealing property of the floating piston 7 is improved.

Compressed gas is stored in the gas storage cavity 6, and the compressed gas is directly introduced to compress in the gas storage cavity 6 relative to common gas or introduced common gas, so that the provided damping force is larger and the inflation efficiency is higher.

And the piston rod 1 is provided with two limiting nuts which are in limiting fit with the guider 10, and the two limiting nuts are screwed together. The limit nut abuts against the guider 10 after the piston rod 1 retracts, and the piston rod 1 is prevented from flying out.

The assembling process comprises the following steps:

1. assembling: firstly, assembling the inner cylinder 3, the outer cylinder 2 and the floating piston 7;

2. oil injection: quantitatively oiling the oil storage cavity 5 of the inner cylinder 3;

3. assembling a piston: the piston assembly, namely the assembly of the piston valve 9, the piston rod 1 and the guider 10, is put into a cylinder and pressed in place;

4. and (3) inflating: the cylinder is inflated in a fixed quantity from the one-way air inlet nozzle 11;

5. and (4) performing indicator test: detecting working performance parameters of the gas-filled shock absorber;

6. riveting a mouth: and (5) carrying out flanging and riveting on the outer cylinder 2 on a product which is suitable for indicator inspection.

The present invention and its embodiments have been described above schematically, and the description is not limited thereto, and what is shown in the drawings is only one of the embodiments of the present invention, and the actual structure is not limited thereto. Therefore, if the person skilled in the art receives the teaching of the present invention, without departing from the inventive spirit of the present invention, the person skilled in the art should also design the similar structural modes and embodiments without creativity to the technical solution, and all shall fall within the protection scope of the present invention.

Claims

1. The double-layer single-cylinder shock absorber is characterized by comprising an outer cylinder and an inner cylinder which are formed by sleeving, wherein a bottom cover is hermetically connected to one end of the outer cylinder and one end of the inner cylinder, a guider and a piston rod are connected to the other end of the outer cylinder and the other end of the inner cylinder, the guider and the outer cylinder are hermetically connected with the inner cylinder, the piston rod is slidably connected with the guider and the piston rod and the inner cylinder, sealing parts are arranged at the sliding connection positions in a matched mode, an air storage cavity is formed between the outer cylinder and the inner cylinder, an oil storage cavity is formed inside the inner cylinder, a communication hole is formed in one end side face, close to the bottom cover, of the inner cylinder, a floating piston is arranged on the outer side of the inner cylinder, the floating piston is located between the communication hole and the guider, a piston valve is arranged at the end of the piston rod and is slidably connected with the inner wall of the inner cylinder, and an oil hole is formed in the piston valve.

2. The double-deck single cylinder shock absorber of claim 1, wherein said oil passing hole communicates with both side spaces of said piston valve, said oil passing hole being curved.

3. The double-deck single cylinder shock absorber of claim 1, wherein said piston rod has a one-way inlet nozzle at an extended end thereof, said one-way inlet nozzle being connected to said air reservoir.

4. The double-layer single-cylinder shock absorber according to claim 3, wherein the unidirectional air inlet nozzle is internally provided with an air hole, a pressing block, an air-blocking elastic element and a sealing ring, the air hole and the pressing block are arranged oppositely in a matching manner, the pressing block is connected to one side of the air storage cavity in a sliding manner, the air-blocking elastic element is connected with the pressing block and the volume of the unidirectional air inlet nozzle at one side of the air storage cavity, and the pressing block is provided with a plurality of fine holes communicated with the air storage cavity.

5. The double-deck single cylinder shock absorber of claim 1, wherein said floating piston is annular, and wherein said floating piston has a plurality of symmetrically disposed seal grooves in its inner and outer walls.

6. The double-deck single cylinder shock absorber of claim 5 wherein said seal grooves of the same side walls are formed with flat slots therebetween.

7. The dual-layer single cylinder shock absorber according to claim 1, wherein said air reservoir stores compressed air therein.

8. The double-layer single-cylinder shock absorber according to claim 1, wherein the piston rod is provided with a limit nut which is in limit fit with the guide, and the two limit nuts are screwed together.