CN204004140U - A kind of vibration damper - Google Patents

Abstract

The utility model relates to a kind of vibration damper, and described vibration damper comprises: cylindrical shell, piston rod, first piston, the second piston, snap ring, retaining ring.By the technical pattern of double-piston, and increase retaining ring, vibration damper described in the utility model, can have little damping force and large two gears of damping force, can regulate according to the shock conditions of vehicle body, thus the travelling comfort that reinforcement is driven.And by double-piston and retaining ring are set, guarantee that piston rod is in use coaxial all the time with cylindrical shell, avoid piston rod to occur to be offset causing in local hand excessive, thus the working life of vibration damper shorter technical problem.

Description

A kind of vibration damper

Technical field

The utility model relates to a kind of vibration damper, is specifically related to a kind of vibration damper that is provided with double-piston.

Background technique

Vibration damper is widely used in vehicle manufacture.The damping that vibration damper produces is too small, and damping effect is not obvious, the excessive damping effect that but do not reach of damping.Existing hydraulic damper can not damping adjusting, makes ride of vehicle and operational stability poor.And vibration damper in actual use, be not in Vertical direction, to be stretched or compressed.When vibration damper is when being stretched or compressed sideling, because piston rod tilts, so the increase of the impact force of piston rod and cylindrical shell madial wall, thereby accelerate the wearing and tearing of vibration damper, have a strong impact on the working life of vibration damper.

Model utility content

For solving above technical problem, the purpose of this utility model is to provide a kind of vibration damper that can regulate damping according to the shock conditions of vehicle body.

The technical solution of the utility model is: cylindrical shell, and described cylindrical shell comprises oil storage cylinder and inner casing, the bottom of described oil storage cylinder is communicated with the bottom of inner casing;

Piston rod, inserts from described cylindrical shell upper end portion, and described inner casing is divided into upper cylinder half and lower cylinder, and described piston rod can move up and down in the internal vertical direction of cylindrical shell;

First piston, is connected with the underpart of piston rod, and described first piston comprises rebound valve and flowing valve, and the diameter of described first piston is less than the diameter of inner casing;

The second piston, described the second piston is connected with piston rod, is positioned at the top of first piston, the diameter of described the second piston and the equal diameters of inner casing;

Snap ring, is connected with the sidewall of lower cylinder, the equal diameters of its diameter and piston;

Base, is positioned at lower cylinder bottom portion, and described base comprises compression valve and recuperation valve, and described base is connected with snap ring;

Further, described first piston is greater than the length of described snap ring at a distance of the distance of the second piston.

The vibration damper that is provided with double-piston described in the utility model has had at the slight gear of two dampings that produces when violent with vibrations of vibrations, increase the travelling comfort of driving, and by double-piston and retaining ring are set, guarantee that piston rod is in use coaxial all the time with cylindrical shell, avoid piston rod occur skew cause in local hand excessive, thereby the working life of vibration damper shorter technical problem.

Accompanying drawing explanation

Fig. 1 is the structural representation that the utility model is provided with the vibration damper of double-piston.

Fig. 2 is P of the present utility model portion partial enlarged drawing.

Embodiment

Below in conjunction with accompanying drawing and embodiment, the utility model is further described.

Please refer to Fig. 1, Fig. 1 is the structural representation that the utility model is provided with the vibration damper of double-piston.The described vibration damper that is provided with double-piston comprise cylindrical shell 111, the first joint 1, the second joint 2, piston rod 3, dust-proof cover 4, piston 6, piston 23, snap ring 222, oil sealing 21, retaining ring 22, with base 13.

Described cylindrical shell 1 comprises oil storage cylinder 12 and inner casing 121, and the bottom of described oil storage cylinder 12 is communicated with the bottom of inner casing 121.

Described piston rod 3, the inside of inserting cylindrical shell 111 from the top portion of described cylindrical shell 111, described piston rod 3 can move up and down in the internal vertical direction of cylindrical shell 111.

Described piston 6 is connected with the underpart of piston rod 3, and described inner casing is divided into upper cylinder half 5 and lower cylinder 11.The left end of described piston 6, is provided with rebound valve 7.The right-hand member of described piston 6 is provided with flowing valve 8, and the diameter of described piston 6 is slightly less than the diameter of inner casing 121.

Described piston 23 is positioned at the top of piston rod 3, and the diameter of its diameter and inner casing 121 is suitable, and described piston 23 can slide in vertical direction together with piston rod 3.The distance of described piston 23 and piston 6 is greater than the length of described snap ring 222, and object is to avoid piston 23 and snap ring 222 to clash into, and shortens the working life of vibration damper.

Described oil sealing 21 is fixed on the joint of cylindrical shell 111 and piston rod 3, and its effect makes to prevent fluid leakage.For fixed piston rod 3, guarantee that piston rod 3 is coaxial all the time at the volley with cylindrical shell 111, this use is novel at the outer increase retaining ring 22 of oil sealing 21, for fixed piston rod 3.

The utility model is provided with a snap ring 222 in the bottom of described cylindrical shell 111, described snap ring 222 is connected with the sidewall of lower cylinder 11, the equal diameters of its diameter and piston 6;

Because the diameter of piston 6 is slightly less than the diameter of inner casing 121, easily cause piston rod to be offset, for solving this technical problem, vibration damper described in the utility model has added piston 23 above piston 6, the equal diameters of the diameter of described piston and inner casing 121.By retaining ring 22 and the two point of piston 23, fix, guarantee that piston 6 of the present utility model guarantees all the time axial coaxial with cylindrical shell 111 in movement process, avoid vibration damper when there is skew, piston rod is also offset, cause the inwall local pressure of cylindrical shell 111, cause shorter technical problem in working life.

Described base 13 is positioned at lower cylinder bottom portion, and described base is provided with compression valve 9 and recuperation valve 10, and described base 13 is connected with snap ring 222.

Described dust-proof cover 4 is connected with described piston rod 3 tops, covers the top of described cylindrical shell, prevents that dust from entering vibration damper inside from the top of cylindrical shell 111, affects the working life of vibration damper.

Described the first joint 1 is connected with the top of piston rod 3, and described vibration damper is connected with vehicle frame by the first joint 1.Described the second joint 2 is connected with the bottom of cylindrical shell 111, and described the second joint 2 is for connecting vehicle bridge.

The utility model vibration damper in use, the first joint 1 connecting vehicle frame of described vibration damper, the second joint 2 connects vehicle bridge.When vibration damper is compressed, piston rod 3 is descending, and the volume of upper cylinder half 5 increases, and the volume of lower cylinder 11 reduces.Now, flowing valve 8 is opened, and the fluid of lower cylinder 11 enters upper cylinder half 5 by flowing valve 8; Meanwhile, compression valve 9 is opened, and fluid enters oil storage cylinder 12 by compression valve 9, the damping function when throttling action of described flowing valve 8 and 9 pairs of fluid of compression valve makes vibration damper produce compression.

When vibration damper is stretched, piston rod 3 is up, and the volume of upper cylinder half 5 reduces, and the volume of lower cylinder 11 increases.Now, the fluid of upper cylinder half 5 enters lower cylinder 11 by rebound valve 6, opens recuperation valve 10 simultaneously, and fluid enters lower cylinder 11 by oil storage cylinder 12.The damping function when throttling action of described rebound valve 6 and 10 pairs of fluid of recuperation valve makes vibration damper produce stretching exercise.

Especially, because the diameter of piston 6 is slightly less than the internal diameter of cylindrical shell 111, therefore, above snap ring 222, piston 6 is formed with passage 21 and passage 22 (please refer to Fig. 2 partial enlarged drawing) with cylindrical shell 111.

When piston rod 3 moves above snap ring 222, the now effect of passage 21 is equivalent to rebound valve 7, and the effect of passage 22 is equivalent to flowing valve 8, and now, the damping function that vibration damper produces is less.

When piston rod 3 enters snap ring 222 and once moves, due to the equal diameters of diameter and the piston 6 of snap ring 222, so passage 21 disappears with passage 22, and the damping that now vibration damper produces is larger.

Vibration damper described in the utility model has had at the slight gear of two dampings that produces when violent with vibrations of vibrations, increase the travelling comfort of driving, and by double-piston and retaining ring are set, guarantee that piston rod is in use coaxial all the time with cylindrical shell, avoid piston rod occur skew cause in local hand excessive, thereby the working life of vibration damper shorter technical problem.

These are only mode of execution of the present utility model; not thereby limit the scope of the claims of the present utility model; every equivalent structure or conversion of equivalent flow process that utilizes the utility model specification and accompanying drawing content to do; or be directly or indirectly used in other relevant technical fields, be all in like manner included in scope of patent protection of the present utility model.

Claims (2)

1. a vibration damper, is characterized in that, described a kind of vibration damper comprises:

Cylindrical shell, described cylindrical shell comprises oil storage cylinder and inner casing, the bottom of described oil storage cylinder is communicated with the bottom of inner casing;

Piston rod, inserts from described cylindrical shell upper end portion, and described inner casing is divided into upper cylinder half and lower cylinder, and described piston rod can move up and down in the internal vertical direction of cylindrical shell;

First piston, is connected with the underpart of piston rod, and described first piston comprises rebound valve and flowing valve, and the diameter of described first piston is less than the diameter of inner casing;

The second piston, described the second piston is connected with piston rod, is positioned at the top of first piston, the diameter of described the second piston and the equal diameters of inner casing;

Snap ring, is connected with the sidewall of lower cylinder, the equal diameters of its diameter and piston;

Base, is positioned at lower cylinder bottom portion, and described base comprises compression valve and recuperation valve, and described base is connected with snap ring;

And retaining ring, for fixed piston rod, its position is not offset.

2. a kind of vibration damper as claimed in claim 1, is characterized in that, described first piston is greater than the length of described snap ring at a distance of the distance of the second piston.