Variable-stiffness variable-damping nitrogen shock absorber assembly

Abstract

The utility model discloses a variable stiffness and variable damping nitrogen shock absorber assembly which comprises an upper support, the upper support is connected to a nitrogen shock absorber through a variable stiffness spring, the nitrogen shock absorber comprises a piston rod, a nitrogen cylinder and an oil cylinder, the top of the oil cylinder is provided with a stretching tail end hydraulic cavity, and the bottom of the oil cylinder is provided with a compression tail end hydraulic cavity. The bottom end of the piston rod extends into the oil cylinder, a stretching tail end limiting valve, a middle-position piston valve and a compression tail end limiting valve are arranged at the bottom end of the piston rod, when a vehicle runs on a smooth road surface, the shock absorber moves in the middle, only the middle-position piston valve plays a role, the shock absorber outputs small damping and is soft in filter vibration, and when the vehicle runs on large fluctuating road surfaces such as cross country and the like, the shock absorber is not prone to falling off. The shock absorber can run to the compression tail end and the stretching tail end, when the compression tail end limiting valve and the compression tail end cavity are closed, the damper is jointly composed of the compression tail end limiting valve and the middle-position piston valve, the shock absorber outputs large damping, a suspension is hardened, strong support can be provided for a vehicle, and the stability of a vehicle body is guaranteed.

Description

TECHNICAL FIELD

[0001] The utility model relates to nitrogen shock absorber technical field, concretely is a kind of variable stiffness variable damping nitrogen shock absorber assembly. BACKGROUND

[0002] The suspension system of car is equipped with shock absorber inside, to accelerate the attenuation of frame and body vibration, improve the ride comfort of car, cannot satisfy the driving demand of various different types of road surface, for hard off-road vehicle user, especially in desert, gravel and other non-paved road surface has extreme driving demand, in bumpy road surface long time overheating operation, cannot improve the applicability and convenience of shock absorber, cannot guarantee the comfort of driving on paved road surface, also cannot satisfy enough support on off-road road surface. SUMMARY

[0003] The utility model discloses a kind of variable stiffness variable damping nitrogen shock absorber assembly, to solve the problem raised in the above background technology.

[0004] To achieve the above object, the utility model provides the following technical scheme: a kind of variable stiffness variable damping nitrogen shock absorber assembly, including upper support, the upper support is connected to nitrogen shock absorber by variable stiffness spring, the nitrogen shock absorber includes piston rod, nitrogen cylinder and oil cylinder, the top of the oil cylinder is equipped with stretch end hydraulic chamber, the bottom of the oil cylinder is equipped with compression end hydraulic chamber, the bottom end of the piston rod passes through stretch end hydraulic chamber and extends into the inside of oil cylinder, and the bottom end of piston rod is sequentially equipped with stretch end limit valve, mid-piston valve and compression end limit valve from top to bottom, the top end of the piston rod is penetrated and fixedly connected to upper support, the nitrogen cylinder is fixed to the side of oil cylinder, the side between the top of nitrogen cylinder and the side of oil cylinder is connected, when the nitrogen shock absorber is compressed, the bottom end of the piston rod drives compression end limit valve to seal compression end hydraulic chamber, and damping is composed of compression end limit valve and mid-piston valve, and shock absorber outputs large damping, when the nitrogen shock absorber is stretched, the top end of the piston rod drives stretch end limit valve to seal stretch end hydraulic chamber, and damping is composed of stretch end limit valve and mid-piston valve, and shock absorber outputs large damping.

[0005] Preferably, the bottom of the upper support is fixedly connected with an upper spring pad, and the outside of the oil cylinder is fixedly connected with a lower spring pad.

[0006] Preferably, the variable stiffness spring comprises a variable stiffness ring at the upper end and a secondary stiffness ring at the lower end, the bottom end of the variable stiffness ring is fixedly connected with the top end of the secondary stiffness ring, the top end of the variable stiffness ring is fixedly connected with the bottom of the upper spring pad, and the bottom end of the secondary stiffness ring is fixedly connected with the top of the lower spring pad.

[0007] Preferably, the piston rod is provided with a buffer block, and when the nitrogen damper is compressed, the piston rod drives the buffer block to collide and buffer with the top end of the oil cylinder.

[0008] Preferably, the bottom of the stretching end hydraulic cavity is provided with an upper through hole matched with the stretching end limiting valve, and the top of the compression end hydraulic cavity is provided with a lower through hole matched with the compression end limiting valve.

[0009] Compared with the prior art, the utility model has the beneficial effects that:

[0010] When the vehicle runs on a flat road surface such as a highway or a city pavement, the damper is in intermediate motion, at this time, only the middle piston valve works, the damper outputs small damping, the vibration filtering is soft, and the comfort is good; when the vehicle runs on a large undulating road surface such as off-road, the damper runs to the compression and stretching ends, when the compression end limiting valve is closed with the compression end cavity, at this time, the damping is composed of the compression end limiting valve and the middle piston valve, the damper outputs large damping, the suspension is hardened to provide strong support and control for the vehicle, the vibration filtering is fast, and the vehicle body is stable, so that stronger off-road capability is realized. BRIEF DESCRIPTION OF DRAWINGS

[0011] Figure 1 is the sectional view of the utility model;

[0012] Figure 2 is the external structure schematic view of the utility model;

[0013] Figure 3 is the compression state schematic view of the utility model;

[0014] Figure 4 is the stable state schematic view of the utility model;

[0015] Figure 5 is the stretching state schematic view of the utility model.

[0016] In the drawing mark: 1, upper support; 2, upper spring pad plate; 3, variable stiffness spring; 31, variable stiffness ring; 32, two-stage stiffness ring; 4, buffer block; 5, nitrogen damper; 51, piston rod; 52, stretching end limiting valve; 53, middle piston valve; 54, compression end limiting valve; 55, stretching end hydraulic cavity; 56, compression end hydraulic cavity; 57, nitrogen cylinder; 58, oil cylinder; 6, lower spring pad plate. DETAILED DESCRIPTION

[0017] The utility model is further explained in detail below in combination with the drawings and embodiments. Same parts are denoted by same reference numerals. It should be noted that the words "front", "rear", "left", "right", "upper" and "lower" in the following description refer to the directions in the drawings, and the words "bottom" and "top", "inner" and "outer" refer to the directions towards or away from the geometric center of a specific part.

[0018] Embodiment: please refer to Figures 1-5 The utility model provides a technical scheme: a variable stiffness variable damping nitrogen shock absorber assembly, including upper support 1, upper support 1 is connected to nitrogen shock absorber 5 through variable stiffness spring 3, nitrogen shock absorber 5 includes piston rod 51, nitrogen cylinder 57 and oil cylinder 58, the top of oil cylinder 58 is equipped with stretch end hydraulic chamber 55, the bottom of oil cylinder 58 is equipped with compression end hydraulic chamber 56, the bottom end of piston rod 51 passes through stretch end hydraulic chamber 55 and extends into the inside of oil cylinder 58, and the bottom end of piston rod 51 is sequentially equipped with stretch end limiting valve 52, mid-piston valve 53 and compression end limiting valve 54 from top to bottom, the top end of piston rod 51 is fixedly connected in nitrogen cylinder 57 is fixed to the one side of oil cylinder 58, and the one side between the top of nitrogen cylinder 57 and the one side of oil cylinder 58 is linked, when the pressure inside oil cylinder 58 drops, the nitrogen in nitrogen cylinder 57 can automatically supplement into oil cylinder 58, thereby the pressure inside oil cylinder 58 is boosted, when the pressure inside oil cylinder 58 is too high, nitrogen cylinder 57 can absorb the excess pressure, to keep the stability of the pressure inside oil cylinder 58, this kind of mode can not only ensure the stable operation of nitrogen shock absorber 5, but also can effectively prolong the service life of nitrogen shock absorber 5;

[0019] When nitrogen shock absorber 5 is compressed, the bottom end of piston rod 51 drives compression end limiting valve 54 to seal compression end hydraulic chamber 56, and the damping is composed of compression end limiting valve 54 and mid-piston valve 53, the shock absorber outputs large damping, the suspension becomes hard to provide strong support and control for the vehicle, reduces the jolt feeling of the vehicle body, when nitrogen shock absorber 5 is stretched, the top end of piston rod 51 drives stretch end limiting valve 52 to seal stretch end hydraulic chamber 55, and the damping is composed of stretch end limiting valve 52 and mid-piston valve 53, the shock absorber outputs large damping, reduces the vibration of the vehicle body and improves the driving stability of the vehicle.

[0020] In the embodiment, the bottom of upper support 1 is fixedly connected with upper spring pad plate 2, and the outside of oil cylinder 58 is fixedly connected with lower spring pad plate 6.

[0021] In the embodiment, the variable stiffness spring 3 comprises a variable stiffness ring 31 at the upper end and a secondary stiffness ring 32 at the lower end, the bottom end of the variable stiffness ring 31 is fixedly connected to the top end of the secondary stiffness ring 32, the top end of the variable stiffness ring 31 is fixedly connected to the bottom of the upper spring pad plate 2, and the bottom end of the secondary stiffness ring 32 is fixedly connected to the top of the lower spring pad plate 6.

[0022] The variable stiffness spring 3 is formed by peeling the upper end of a round straight bar spring steel material and then hot coiling, and according to the spring compression amount, a smaller first stiffness and a larger second stiffness are realized, and because the variable stiffness ring simultaneously changes the wire diameter and the pitch, the change range of the second stiffness can reach twice that of the first stiffness. When the vehicle is running on a flat road such as a highway or a city pavement, the spring is in a smaller first stiffness, the suspension is soft, and the comfort is good; when the vehicle is running on a large undulating road such as off-road, or the load is large, several turns of the upper end of the variable stiffness ring 31 will not work, the number of active turns is reduced, the variable stiffness spring 3 is in a larger second stiffness, the suspension is hard, the support is strong, and the handling is good.

[0023] In the embodiment, the piston rod 51 is provided with a buffer block 4, and when the nitrogen shock absorber 5 is compressed, the piston rod 51 drives the buffer block 4 to collide and buffer with the top end of the oil cylinder 58.

[0024] In the embodiment, the bottom of the stretching end hydraulic cavity 55 is provided with an upper through hole matched with the stretching end limiting valve 52, and the top of the compression end hydraulic cavity 56 is provided with a lower through hole matched with the compression end limiting valve 54.

[0025] When the vehicle is running on a flat road such as a highway or a city pavement, the shock absorber is in intermediate motion, at this time only the middle piston valve 53 works, the shock absorber outputs small damping, the vibration filtering is soft, and the comfort is good; when the vehicle is running on a large undulating road such as off-road, the shock absorber will run to the compression and stretching ends, when the compression end limiting valve 54 is sealed with the compression end hydraulic cavity 56, at this time the damping is composed of the compression end limiting valve 54 and the middle piston valve 53, the shock absorber outputs large damping, the suspension is hard, which can provide strong support and control for the vehicle, the vibration filtering is fast, and the vehicle body is stable, so as to realize stronger off-road capability.

[0026] It is obvious for those skilled in the art that the utility model is not limited to the details of the above-mentioned exemplary embodiments, and the utility model can be realized in other specific forms without departing from the spirit or basic characteristics of the utility model. Therefore, no matter from which point of view, the embodiments should be regarded as exemplary and non-limiting, the scope of the utility model is defined by the appended claims rather than the above description, and therefore all changes falling within the meaning and scope of the equivalent elements of the claims are intended to be included in the utility model. Any reference signs in the claims should not be regarded as limiting the claims involved.

Claims

1. A variable stiffness and variable damping nitrogen damper assembly, characterized by: The application relates to a nitrogen shock absorber, which comprises an upper support (1) connected to a nitrogen shock absorber (5) through a variable stiffness spring (3), the nitrogen shock absorber (5) comprises a piston rod (51), a nitrogen cylinder (57) and an oil cylinder (58), the top of the oil cylinder (58) is provided with a stretching end hydraulic cavity (55), the bottom of the oil cylinder (58) is provided with a compression end hydraulic cavity (56), the bottom end of the piston rod (51) penetrates into the inside of the oil cylinder (58) through the stretching end hydraulic cavity (55), and the bottom end of the piston rod (51) is sequentially provided, from top to bottom, with a stretching end limiting valve (52), a middle piston valve (53) and a compression end limiting valve (54), the top end of the piston rod (51) penetrates and is fixedly connected to the upper support (1), and the nitrogen cylinder (57) is fixed to one side of the oil cylinder (58) and is in communication with one side of the top of the oil cylinder (58).

2. A variable stiffness and variable damping nitrogen gas shock absorber assembly as described in claim 1, wherein: The bottom of the upper support (1) is fixedly connected with an upper spring pad (2), and the outside of the oil cylinder (58) is fixedly connected with a lower spring pad (6).

3. A variable stiffness and variable damping nitrogen gas shock absorber assembly as described in claim 2, wherein: The variable stiffness spring (3) comprises a variable stiffness ring (31) at the upper end and a secondary stiffness ring (32) at the lower end, the bottom end of the variable stiffness ring (31) is fixedly connected to the top end of the secondary stiffness ring (32), the top end of the variable stiffness ring (31) is fixedly connected to the bottom of the upper spring pad (2), and the bottom end of the secondary stiffness ring (32) is fixedly connected to the top of the lower spring pad (6).

4. A variable stiffness and variable damping nitrogen gas shock absorber assembly as set forth in claim 3, wherein: The piston rod (51) is provided with a buffer block (4), when the nitrogen shock absorber (5) is compressed, the piston rod (51) drives the buffer block (4) to collide and buffer with the top end of the oil cylinder (58).

5. A variable stiffness and variable damping nitrogen gas shock absorber assembly as set forth in claim 4, wherein: The bottom of the stretching end hydraulic cavity (55) is provided with an upper through hole matched with the stretching end limiting valve (52), and the top of the compression end hydraulic cavity (56) is provided with a lower through hole matched with the compression end limiting valve (54).

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