CN214945987U

CN214945987U - Drum type hydraulic shock absorber with high-pressure air bag

Info

Publication number: CN214945987U
Application number: CN202121292793.0U
Authority: CN
Inventors: 徐强; 王鹏飞; 赵伟峰; 郭维; 李勇
Original assignee: Xi'an Oude Rubber Technology Co ltd; Shaanxi Deshi Vehicle Components Group Co ltd
Current assignee: Xi'an Oude Rubber Technology Co ltd; Shaanxi Deshi Vehicle Components Group Co ltd
Priority date: 2021-06-09
Filing date: 2021-06-09
Publication date: 2021-11-30
Anticipated expiration: 2031-06-09

Abstract

The application discloses a barrel type hydraulic shock absorber with a high-pressure air bag, which comprises a working cylinder body, a first piston rod, an inner piston and a first valve group, wherein the working cylinder body comprises an inner cylinder body and a middle cylinder body sleeved outside the inner cylinder body; an inner piston is arranged at the end part of the first piston rod, and the side wall of the inner piston is abutted against the inner wall of the inner cylinder body; an oil storage cavity is formed between the middle cylinder body and the inner cylinder body, and oil liquid is filled in the oil storage cavity and the first working cylinder; an annular supporting piece is arranged in the oil storage cavity, a first air bag of an annular structure is arranged at the lower end of the annular supporting piece, and the first air bag is sleeved outside the inner cylinder body; the inner piston is provided with a first flow valve and a first extension valve which are used for communicating an upper chamber of the first working cylinder with a lower chamber of the first working cylinder; the bottom of the inner cylinder body is provided with a first compression valve and a first compensation valve which are used for communicating the first working cylinder with a lower cavity of the oil storage cavity. The space production vacuum under the piston when current bumper shock absorber compression has been solved in this application, and influences the problem of shock attenuation effect.

Description

Drum type hydraulic shock absorber with high-pressure air bag

Technical Field

The application belongs to the technical field of shock absorbers, and particularly relates to a barrel type hydraulic shock absorber with a high-pressure air bag.

Background

The shock absorber is used for inhibiting the shock when the spring absorbs the shock and rebounds and the impact from the road surface. The damping device is widely applied to automobiles and is used for accelerating the attenuation of the vibration of a frame and an automobile body so as to improve the driving smoothness of the automobiles. When the automobile passes through an uneven road surface, although the shock absorption spring can filter the vibration of the road surface, the spring can still do reciprocating motion, the shock absorber is used for inhibiting the spring from jumping, the shock absorber is arranged in the suspension system because the elastic element is impacted to generate the shock, in order to improve the running smoothness of the automobile, the shock absorber is arranged in the suspension system and is connected with the elastic element in parallel, in order to attenuate the shock, most of the shock absorbers adopted in the automobile suspension system are hydraulic shock absorbers, the working principle is that when the frame (or the automobile body) and the axle vibrate and the relative motion occurs, a piston in the shock absorber moves up and down, and the oil in the shock absorber cavity repeatedly flows into the other cavity from one cavity through different pores. At the moment, the friction between the hole wall and the oil and the internal friction between oil molecules form damping force on vibration, so that the vibration energy of the automobile is converted into oil heat energy, and then the oil heat energy is absorbed by the shock absorber and is emitted into the atmosphere. When the cross section and other factors of the oil passage are not changed, the damping force is increased and decreased along with the relative movement speed between the vehicle frame and the vehicle axle (or the vehicle wheel) and is related to the viscosity of the oil. When the existing shock absorber is compressed quickly, the space below the piston can generate vacuum, and when the shock absorber rebounds, no damping exists in the section of stroke for generating the vacuum, so that the shock absorbing effect is influenced, and further discomfort is caused to passengers.

SUMMERY OF THE UTILITY MODEL

The embodiment of the application provides a take high-pressure air bag's cylinder hydraulic damper, has solved space production vacuum under the piston when current bumper shock absorber compression, and influences the problem of shock attenuation effect.

The embodiment of the utility model provides a cylinder hydraulic shock absorber with high-pressure air bag, including the working cylinder body, first piston rod, internal piston and first valve group, first valve group includes first circulation valve, first extension valve, first compression valve and first compensating valve;

the working cylinder body comprises a columnar inner cylinder body and a columnar middle cylinder body coaxially sleeved outside the inner cylinder body; the end part of the first piston rod is provided with the inner piston, the first piston rod extends into the inner cylinder body from the top of the working cylinder body, the side wall of the inner piston is abutted against the inner wall of the inner cylinder body, and a first working cylinder is formed inside the inner cylinder body;

an oil storage cavity is formed between the middle cylinder body and the inner cylinder body, and oil is filled in the oil storage cavity and the first working cylinder;

an annular supporting piece is arranged in the oil storage cavity, the inner side wall of the annular supporting piece is connected with the outer wall of the inner cylinder body, the outer side wall of the annular supporting piece is connected with the inner wall of the middle cylinder body, a first air bag of an annular structure is arranged at the lower end of the annular supporting piece, and the first air bag is sleeved outside the inner cylinder body;

the inner piston is provided with the first flow valve and the first extension valve which are used for communicating an upper chamber of the first working cylinder with a lower chamber of the first working cylinder;

the bottom of the inner cylinder body is provided with the first compression valve and the first compensation valve which are used for communicating the first working cylinder with the lower cavity of the oil storage cavity.

In one possible implementation, the tube hydraulic shock absorber with the high-pressure air bag further comprises a second piston rod, an outer piston and a second valve group; the second valve group comprises a second flow valve, a second expansion valve, a second compression valve and a second compensation valve;

the working cylinder body also comprises a columnar outer cylinder body coaxially sleeved outside the middle cylinder body; the end part of the second piston rod is connected with the annular outer piston, the second piston rod extends into the outer cylinder body from the bottom of the working cylinder body, the inner side wall of the outer piston is abutted against the outer wall of the middle cylinder body, the outer side wall of the outer piston is abutted against the inner wall of the outer cylinder body, a second working cylinder is formed between the outer cylinder body and the middle cylinder body, and oil is filled in the second working cylinder;

the upper part of the side wall of the middle cylinder body is provided with the second compression valve and the second compensation valve which are used for communicating the upper chamber of the second working cylinder with the upper chamber of the oil storage chamber;

and the outer piston is provided with the second flow valve and the second extension valve which are used for communicating the upper chamber of the second working cylinder with the lower chamber of the second working cylinder.

In a possible implementation manner, the upper end of the annular support member is provided with a second air bag of an annular structure, and the second air bag is sleeved outside the inner cylinder body.

In one possible implementation, the first and second balloons are filled with nitrogen gas.

In a possible implementation manner, the top wall of the working cylinder body is provided with a first oil seal at the position where the first piston rod passes through, and the bottom wall of the working cylinder body is provided with a second oil seal at the position where the second piston rod passes through.

In a possible implementation manner, the upper end and the lower end of the inner wall of the inner cylinder body are respectively provided with an inner limiting ring for clamping the inner piston;

the upper end and the lower extreme of the inner wall of outer cylinder body all are equipped with and are used for the joint outer spacing ring of outer piston.

In a possible implementation manner, the number of the second piston rods is two, and the two second piston rods are respectively located at two sides of the second working cylinder.

In one possible implementation, the first piston rod and the inner piston are connected by a first compression nut, and the second piston rod and the outer piston are connected by a second compression nut.

In one possible implementation, the telescopic hydraulic shock absorber with the high-pressure air bag further comprises a first dust cover and a second dust cover;

the first dust cover is sleeved at the upper end of the working cylinder body, the first piston rod is connected to the top wall of the first dust cover, and an upper lifting ring is arranged at the upper end of the first dust cover;

the second dust cover is sleeved at the lower end of the first dust cover, the second piston rod is connected to the bottom wall of the second dust cover, and a lower hanging ring is arranged at the lower end of the second dust cover.

In one possible implementation, the end of the inner wall of the second dust cover is provided with a sealing ring.

The embodiment of the utility model provides an in one or more technical scheme, following technological effect or advantage have at least:

the embodiment of the utility model provides a cylinder hydraulic shock absorber with a high-pressure air bag, when a vehicle bumps or shakes, the shock absorber generates damping force to a spring, thereby inhibiting the shock when the spring rebounds after absorbing shock and the impact from the road surface; when the first piston rod compresses oil in the lower cavity of the first working cylinder, the oil enters the lower cavity of the oil storage cavity through the first compression valve, so that the first air bag is compressed, the first air bag is contracted under high pressure, and the volume change generated by compression is relieved. When the shock absorber compressed fast, first gasbag had promoted the atmospheric pressure of the lower part cavity in oil storage chamber through its interior gas to interior piston lower extreme produced vacuum "idle stroke" when can effectually avoiding the shock absorber compression, and then improved the shock attenuation effect of shock absorber. The utility model discloses the volume change that produces when can effectively alleviating first piston rod and remove makes the bumper shock absorber produce the damping force better. The utility model discloses hydraulic oil gassing and produce the idle stroke when high-speed violent motion when can avoiding the violent motion of bumper shock absorber, and influence the problem of bumper shock absorber shock attenuation effect.

Drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings required to be used in the embodiments of the present invention will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.

Fig. 1 is a schematic structural view of a tubular hydraulic shock absorber with a high-pressure air bag according to an embodiment of the present invention.

Reference numerals: 1-a working cylinder body; 11-an inner cylinder body; 111-an inner stop collar; 12-an intermediate cylinder; 13-outer spacing ring of outer cylinder 131; 14-a first oil seal; 15-a second oil seal; 2-a first piston rod; 3-an inner piston; 4-a first valve group; 41-a first flow valve; 42-a first extension valve; 43-a first compression valve; 44-a first compensation valve; 5-a first working cylinder; 6-oil storage chamber; 61-an annular support; 62-a first balloon; 63-a second balloon; 7-a second piston rod; 8-an outer piston; 9-a second valve group; 10-a second working cylinder; 21-a first dust cover; 211-upper lifting ring; 22-a second dust cover; 221-sealing ring.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

In the embodiments of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, which is only for convenience of describing the embodiments of the present invention and simplifying the description, but does 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. The terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance. Furthermore, the terms "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 meaning of the above terms in the embodiments of the present invention can be understood by those skilled in the art according to specific situations.

As shown in fig. 1, the embodiment of the present invention provides a cylinder hydraulic shock absorber with a high pressure air bag, which includes a working cylinder body 1, a first piston rod 2, an inner piston 3, and a first valve group 4, wherein the first valve group 4 includes a first flow valve 41, a first extension valve 42, a first compression valve 43, and a first compensation valve 44.

The working cylinder body 1 comprises a columnar inner cylinder body 11 and a columnar middle cylinder body 12 coaxially sleeved outside the inner cylinder body 11; an inner piston 3 is installed at the end part of the first piston rod 2, the first piston rod 2 extends into the inner cylinder body 11 from the top of the working cylinder body 1, the side wall of the inner piston 3 is abutted against the inner wall of the inner cylinder body 11, and a first working cylinder 5 is formed inside the inner cylinder body 11.

An oil storage cavity 6 is formed between the middle cylinder body 12 and the inner cylinder body 11, and oil is filled in the oil storage cavity 6 and the first working cylinder 5;

an annular supporting piece 61 is arranged in the oil storage cavity 6, the inner side wall of the annular supporting piece 61 is connected with the outer wall of the inner cylinder body 11, the outer side wall of the annular supporting piece 61 is connected with the inner wall of the middle cylinder body 12, a first air bag 62 of an annular structure is arranged at the lower end of the annular supporting piece 61, and the first air bag 62 is sleeved outside the inner cylinder body 11.

The inner piston 3 is provided with a first flow valve 41 and a first extension valve 42 which are used for communicating the upper chamber of the first working cylinder 5 with the lower chamber of the first working cylinder 5;

the bottom of the inner cylinder 11 is provided with a first compression valve 43 and a first compensation valve 44 for communicating the lower chambers of the first cylinder 5 and the reserve chamber 6.

It should be noted that the oil in the oil storage chamber 6 and the first working cylinder 5 is not filled, and a certain amount of space is left, so that the oil can flow conveniently, and the damping function of the shock absorber is realized.

The springs provided in the first flow valve 41 and the first compensation valve 44, and the second flow valve and the second compensation valve mentioned below are relatively soft, so that when the oil pressure in the shock absorber is low, that is, when the shock absorber is subjected to a small pressure or tensile force, the first flow valve 41, the first compensation valve 44, the second flow valve, or the second compensation valve is opened to perform the flow of the oil, thereby generating a small damping force when the shock absorber is extended or shortened. The springs provided in the first extension valve 42 and the first compression valve 43, and the second extension valve and the second compression valve mentioned below are relatively stiff, and only when the oil pressure in the shock absorber is high, that is, when the shock absorber is subjected to a large pressure or tensile force, the first extension valve 42, the first compression valve 43, the second extension valve, or the second compression valve opens to allow the flow of oil, thereby generating a large damping force when the shock absorber extends or contracts.

The embodiment of the utility model provides a take cylinder hydraulic shock absorber of high-pressure air bag needs to cooperate the spring to realize cushioning effect, installs the bumper shock absorber on the wheel of vehicle after, when the vehicle runs into jolting or when vibrations, the bumper shock absorber produces damping force to the spring to shock and the impact that comes from the road surface when restraining the spring and inhaling the bounce-back.

When the first piston rod 2 compresses the oil in the lower chamber of the first cylinder 5, the oil enters the lower chamber of the oil storage chamber 6 through the first compression valve 43, so that the first air bag 62 is compressed, and the first air bag 62 is contracted by high pressure, thereby relieving the volume change generated by compression. If the first air bag 62 is not provided, during this process, when the first piston rod 2 extends into a part of the chamber occupying the upper part of the first cylinder 5, the oil cannot flow completely to accommodate the volume occupied by the first piston rod 2, thereby creating a vacuum "lost motion" in the lower part of the first cylinder 5. When the shock absorber compressed fast, first gasbag 62 had promoted the atmospheric pressure of the lower part cavity of oil storage chamber 6 through its interior gas to interior piston 3 lower extreme produced vacuum "idle stroke" when can effectually avoiding the shock absorber compression, and then improved the shock attenuation effect of shock absorber. The utility model discloses the volume change that produces when can effectively alleviating 2 removals of first piston rod makes the bumper shock absorber produce the damping force better. The utility model discloses hydraulic oil gassing and produce the idle stroke when high-speed violent motion when can avoiding the violent motion of bumper shock absorber, and influence the problem of bumper shock absorber shock attenuation effect.

In this embodiment, the tube hydraulic shock absorber with the high pressure air bag further comprises a second piston rod 7, an outer piston 8 and a second valve group 9; the second valve group 9 includes a second flow valve, a second extension valve, a second compression valve, and a second compensation valve.

The working cylinder body 1 also comprises a columnar outer cylinder body 13 coaxially sleeved outside the middle cylinder body 12; the end of the second piston rod 7 is connected with an annular outer piston 8, the second piston rod 7 extends into the outer cylinder 13 from the bottom of the working cylinder 1, the inner side wall of the outer piston 8 is abutted against the outer wall of the middle cylinder 12, the outer side wall of the outer piston 8 is abutted against the inner wall of the outer cylinder 13, a second working cylinder 10 is formed between the outer cylinder 13 and the middle cylinder 12, and oil is filled in the second working cylinder 10.

A second compression valve and a second compensation valve for communicating the upper chamber of the second cylinder 10 with the upper chamber of the reserve chamber 6 are provided on the upper portion of the side wall of the intermediate cylinder body 12.

The outer piston 8 is provided with a second flow valve and a second extension valve for communicating an upper chamber of the second cylinder 10 with a lower chamber of the second cylinder 10.

The embodiment of the utility model provides a take cylinder hydraulic shock absorber of high-pressure air bag during specific work, because annular support piece 61 separates into two cavities that do not communicate with each other with oil storage chamber 6, the core part of first working cylinder 5 and second working cylinder 10 is the same simultaneously, therefore the theory of operation of first working cylinder 5 and second working cylinder 10 is the same, carries out to first working cylinder 5 now the utility model discloses the principle description of bumper shock absorber. The utility model discloses a bumper shock absorber is applicable to the vehicle that installation space is little and need great shock attenuation range, through setting up two sets of working cylinders, can satisfy the shock attenuation demand of current vehicle by a relatively large margin.

When the telescopic hydraulic shock absorber with the high-pressure air bag is stressed and compressed, the first piston rod 2 moves downwards, so that the volume of a cavity at the upper part of the first working cylinder 5 is increased, the volume of a cavity at the lower part of the first working cylinder 5 is reduced, and the oil pressure of the cavity at the lower part is higher than that of the cavity at the upper part. So that the oil in the chamber in the lower portion of the first cylinder 5 flows into the chamber in the upper portion of the first cylinder 5 through the first through-flow valve 41. The volume of the upper chamber is smaller than the volume of the lower chamber because the first piston rod 2 extends into the upper chamber occupying the upper part of the first working cylinder 5, so that the oil cannot flow completely to adapt to the volume occupied by the first piston rod 2, and the oil in the lower chamber of the first working cylinder 5 flows into the lower chamber of the oil storage chamber 6 through the first compression valve 43, and the flow area of the valves is small, so that a certain damping force is generated when the oil flows.

When the telescopic hydraulic shock absorber with the high-pressure air bag is stressed and stretched, the first piston rod 2 moves upwards, so that the volume of the cavity at the upper part of the first working cylinder 5 is reduced, the volume of the cavity at the lower part of the first working cylinder 5 is increased, and the oil pressure of the cavity at the lower part is smaller than that of the cavity at the upper part. So that the oil in the chamber in the upper portion of the first cylinder 5 flows into the chamber in the lower portion of the first cylinder 5 through the first extension valve 42. The first piston rod 2 moves upwards to enable the chamber at the lower part of the first working cylinder 5 to generate certain vacuum degree, so that oil in the chamber at the lower part of the oil storage chamber 6 flows into the chamber at the lower part of the first working cylinder 5 through the first compensation valve 44, and meanwhile, the first air bag 62 improves the air pressure of the chamber at the lower part of the oil storage chamber 6 through air in the first air bag; the oil flows through these valves to generate a certain damping force.

The embodiment of the utility model provides a take cylinder hydraulic shock absorber of high-pressure air bag has realized two-way damped function, through setting up oil storage chamber 6, first piston rod 2 and second piston rod 7, and first working cylinder 5 and second working cylinder 10, when the vehicle runs into great jolting or vibrations, first piston rod 2 and second piston rod 7 can extend or shorten simultaneously to produce certain damping force, and then carry out the shock attenuation effectively to the vehicle, promoted passenger's the comfort of taking greatly, consequently the utility model discloses a shock absorber can satisfy the shock attenuation demand by a wide margin of current vehicle.

In this embodiment, the upper end of the annular supporting member 61 is provided with a second air bag 63 having an annular structure, and the second air bag 63 is sleeved outside the inner cylinder 11.

It should be noted that the second air bag 63 is provided to prevent the upper end of the outer piston 8 from generating a vacuum "idle stroke" when the shock absorber is compressed when the second cylinder 10 is operated, thereby improving the shock absorbing effect of the shock absorber.

In this embodiment, the first air bag 62 and the second air bag 63 are filled with nitrogen gas.

In this embodiment, the top wall of the cylinder block 1 is provided with a first oil seal 14 at a position where the first piston rod 2 passes through, and the bottom wall of the cylinder block 1 is provided with a second oil seal 15 at a position where the second piston rod 7 passes through.

It should be noted that the first oil seal 14 and the second oil seal 15 can prevent oil from seeping out and ensure the working pressure in the first cylinder 5 and the second cylinder 10. The oil seal is sealed by lubricating oil. The oil seal is a mechanical element for sealing grease, and separates a part needing lubrication in a transmission part from a force-applying part, so that lubricating oil is prevented from leaking. The utility model discloses a first oil blanket 14 and second oil blanket 15 all adopt the dynamic seal to realize reciprocating motion better. The utility model discloses a first oil blanket 14 and second oil blanket 15 adopt the nitrile rubber material, and nitrile rubber has better heat-resisting, wear resistance, resistant various lubricating oil, lubricating grease, oil-gas mixture etc. and suitable temperature-30 ~ 120 degrees centigrade, stable performance in petrol and low aniline point mineral oil.

In this embodiment, the upper end and the lower end of the inner wall of the inner cylinder body 11 are both provided with inner limiting rings 111 for clamping the inner piston 3; the upper end and the lower extreme of the inner wall of outer cylinder body 13 all are equipped with the outer spacing ring 131 that is used for joint outer piston 8.

It should be noted that, as shown in fig. 1, the inner limiting ring 111 is provided to avoid the problem that the inner piston 3 presses the first valve set 4 when moving, so as to cause the first valve set 4 to fail. The inner stopper ring 111 maintains a certain distance from both the bottom surface and the top surface of the inner cylinder 11. The outer limiting ring 131 is arranged to avoid the problem that the second valve set 9 is pressed when the outer piston 8 moves, so that the second valve set 9 fails. The outer stopper 131 is spaced apart from both the bottom surface and the top surface of the outer cylinder 13.

In this embodiment, the number of the second piston rods 7 is two, and the two second piston rods 7 are respectively located on both sides of the second cylinder 10.

It should be noted that the two second piston rods 7 can make the movement of the outer piston 8 more stable, and avoid the problems of the outer piston 8 such as tilting.

In this embodiment, the first piston rod 2 and the inner piston 3 are connected by a first compression nut, and the second piston rod 7 and the outer piston 8 are connected by a second compression nut.

It should be noted that the threaded section provided at the end of the first piston rod 2 is connected to the first compression nut after passing through the hole at the center of the inner piston 3, and the first compression nut is disposed in the groove provided on the inner piston 3. The working principle of the first compression nut and the second compression nut is that the self-locking is carried out by adopting the friction force between the compression nut and the bolt. The utility model discloses locking measure is taken to the piston rod junction, guarantees the reliability of nut locking. Therefore, when the inner piston 3 and the outer piston 8 are fixed through the first compression nut and the second compression nut, the reliability is higher, and the looseness is not easy to occur.

In this embodiment, a first dust cover 21 and a second dust cover 22 are further included; the first dust cover 21 is sleeved at the upper end of the working cylinder body 1, the first piston rod 2 is connected to the top wall of the first dust cover 21, and the upper end of the first dust cover 21 is provided with an upper hanging ring 211; the second dust cover 22 is sleeved on the lower end of the first dust cover 21, the second piston rod 7 is connected to the bottom wall of the second dust cover 22, and the lower end of the second dust cover 22 is provided with a lower hanging ring.

It should be noted that, when the tube-type hydraulic shock absorber with the high-pressure air bag works, the first dust cover 21 and the first piston rod 2 move simultaneously, the second dust cover 22 and the second piston rod 7 move simultaneously, the first dust cover 21 and the second dust cover 22 can protect the first piston rod 2 and the second piston rod 7 from being damaged, dust is prevented from entering the working cylinder body 1, meanwhile, the movement tracks of the first piston rod 2 and the second piston rod 7 can be guided, and the stability of the first piston rod 2 and the second piston rod 7 during movement is improved.

In this embodiment, a seal ring 221 is provided at an end portion of the inner wall of the second dust cover 22.

The seal ring 221 can further prevent dust from entering the cylinder block 1.

The shock absorber provided by the embodiment of the utility model is arranged on the wheel of the vehicle, when the vehicle bumps or shakes, the shock absorber generates damping force to the spring, thereby inhibiting the shock when the spring rebounds after absorbing shock and the impact from the road surface; when the first piston rod compresses oil in the lower cavity of the first working cylinder, the oil enters the lower cavity of the oil storage cavity through the first compression valve, so that the first air bag is compressed, the first air bag is contracted under high pressure, and the volume change generated by compression is relieved. When the shock absorber compressed fast, first gasbag had promoted the atmospheric pressure of the lower part cavity in oil storage chamber through its interior gas to interior piston lower extreme produced vacuum "idle stroke" when can effectually avoiding the shock absorber compression, and then improved the shock attenuation effect of shock absorber. The utility model discloses the volume change that produces when can effectively alleviating first piston rod and remove makes the bumper shock absorber produce the damping force better. The utility model discloses hydraulic oil gassing and produce the idle stroke when high-speed violent motion when can avoiding the violent motion of bumper shock absorber, and influence the problem of bumper shock absorber shock attenuation effect.

The embodiments in the present specification are described in a progressive manner, and the same or similar parts among the embodiments may be referred to each other, and each embodiment focuses on the differences from the other embodiments.

The above embodiments are only used to illustrate the technical solutions of the present application, and not to limit the present application; although the present application has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; such modifications or substitutions do not depart from the spirit and scope of the present disclosure.

Claims

1. The utility model provides a take cartridge hydraulic shock absorber of high pressure gasbag which characterized in that: the hydraulic control system comprises a working cylinder body (1), a first piston rod (2), an inner piston (3) and a first valve group (4), wherein the first valve group (4) comprises a first flow valve (41), a first extension valve (42), a first compression valve (43) and a first compensation valve (44);

the working cylinder body (1) comprises a columnar inner cylinder body (11) and a columnar middle cylinder body (12) which is coaxially sleeved outside the inner cylinder body (11); the inner piston (3) is mounted at the end part of the first piston rod (2), the first piston rod (2) extends into the inner cylinder body (11) from the top of the working cylinder body (1), the side wall of the inner piston (3) is abutted against the inner wall of the inner cylinder body (11), and a first working cylinder (5) is formed inside the inner cylinder body (11);

an oil storage cavity (6) is formed between the middle cylinder body (12) and the inner cylinder body (11), and oil liquid is filled in the oil storage cavity (6) and the first working cylinder (5);

an annular supporting piece (61) is arranged in the oil storage cavity (6), the inner side wall of the annular supporting piece (61) is connected with the outer wall of the inner cylinder body (11), the outer side wall of the annular supporting piece (61) is connected with the inner wall of the middle cylinder body (12), a first air bag (62) of an annular structure is arranged at the lower end of the annular supporting piece (61), and the first air bag (62) is sleeved outside the inner cylinder body (11);

the inner piston (3) is provided with a first flow valve (41) and a first expansion valve (42) which are used for communicating an upper chamber of the first working cylinder (5) with a lower chamber of the first working cylinder (5);

the bottom of the inner cylinder body (11) is provided with the first compression valve (43) and the first compensation valve (44) which are used for communicating the first working cylinder (5) with the lower chamber of the oil storage cavity (6).

2. The telescopic hydraulic shock absorber with a high pressure air bag according to claim 1, wherein: the hydraulic control system also comprises a second piston rod (7), an outer piston (8) and a second valve group (9); the second valve group (9) comprises a second flow valve, a second expansion valve, a second compression valve and a second compensation valve;

the working cylinder body (1) also comprises a columnar outer cylinder body (13) coaxially sleeved outside the middle cylinder body (12); the end part of the second piston rod (7) is connected with the annular outer piston (8), the second piston rod (7) extends into the outer cylinder body (13) from the bottom of the working cylinder body (1), the inner side wall of the outer piston (8) is abutted against the outer wall of the middle cylinder body (12), the outer side wall of the outer piston (8) is abutted against the inner wall of the outer cylinder body (13), a second working cylinder (10) is formed between the outer cylinder body (13) and the middle cylinder body (12), and oil is filled in the second working cylinder (10);

the upper part of the side wall of the middle cylinder body (12) is provided with a second compression valve and a second compensation valve which are used for communicating the upper chamber of the second working cylinder (10) with the upper chamber of the oil storage cavity (6);

the outer piston (8) is provided with a second flow valve and a second extension valve which are used for communicating an upper chamber of the second working cylinder (10) with a lower chamber of the second working cylinder (10).

3. The telescopic hydraulic shock absorber with the high pressure air bag according to claim 2, wherein: the upper end of the annular supporting piece (61) is provided with a second air bag (63) with an annular structure, and the second air bag (63) is sleeved outside the inner cylinder body (11).

4. The telescopic hydraulic shock absorber with the high pressure air bag according to claim 3, wherein: the first air bag (62) and the second air bag (63) are filled with nitrogen.

5. The telescopic hydraulic shock absorber with the high pressure air bag according to claim 2, wherein: the top wall of the working cylinder body (1) is provided with a first oil seal (14) at the position where the first piston rod (2) penetrates, and the bottom wall of the working cylinder body (1) is provided with a second oil seal (15) at the position where the second piston rod (7) penetrates.

6. The telescopic hydraulic shock absorber with the high pressure air bag according to claim 2, wherein: the upper end and the lower end of the inner wall of the inner cylinder body (11) are respectively provided with an inner limiting ring (111) for clamping the inner piston (3);

the upper end and the lower extreme of the inner wall of outer cylinder body (13) all are equipped with and are used for the joint outer spacing ring (131) of outer piston (8).

7. The telescopic hydraulic shock absorber with the high pressure air bag according to claim 2, wherein: the number of the second piston rods (7) is two, and the two second piston rods (7) are respectively positioned on two sides of the second working cylinder (10).

8. The telescopic hydraulic shock absorber with the high pressure air bag according to claim 2, wherein: the first piston rod (2) is connected with the inner piston (3) through a first compression nut, and the second piston rod (7) is connected with the outer piston (8) through a second compression nut.

9. The telescopic hydraulic shock absorber with the high pressure air bag according to claim 2, wherein: further comprising a first dust cover (21) and a second dust cover (22);

the first dust cover (21) is sleeved at the upper end of the working cylinder body (1), the first piston rod (2) is connected to the top wall of the first dust cover (21), and an upper hanging ring (211) is arranged at the upper end of the first dust cover (21);

the second dust cover (22) is sleeved at the lower end of the first dust cover (21), the second piston rod (7) is connected to the bottom wall of the second dust cover (22), and a lower hanging ring is arranged at the lower end of the second dust cover (22).

10. The telescopic hydraulic shock absorber with the high pressure air bag according to claim 9, wherein: and a sealing ring (221) is arranged at the end part of the inner wall of the second dust cover (22).