CN217519116U

CN217519116U - Shock absorber strenghthened type recovers hydraulic buffer structure

Info

Publication number: CN217519116U
Application number: CN202220385217.9U
Authority: CN
Inventors: 柴俊波; 陈学志; 张道显; 王建超; 李多会; 尹超
Original assignee: Nanyang Weiao Situ Vehicle Shock Absorber Co ltd
Current assignee: Nanyang Weiao Situ Vehicle Shock Absorber Co ltd
Priority date: 2022-02-25
Filing date: 2022-02-25
Publication date: 2022-09-30
Anticipated expiration: 2032-02-25

Abstract

The utility model belongs to the technical field of shock absorbers, in particular to a shock absorber reinforced hydraulic buffer structure that recovers, which is applied to a shock absorber, and comprises a buffer cylinder sleeve that is sleeved outside a piston rod and a buffer component that is sleeved outside the piston rod and can extend into the buffer cylinder sleeve in the working process, wherein the buffer component comprises a position limiter that is sleeved at the step of the piston rod, a stop ring that is fixedly connected with the piston rod, a current stabilizing ring, a throttle sheet and a piston ring; the piston ring is sleeved outside the current stabilizing ring and positioned between the limiting device and the throttle sheet and can float in a reciprocating manner along the axial direction of the current stabilizing ring; the buffer assembly further comprises a buffer cushion and a spring piece, the buffer cushion is sleeved outside the piston rod and is located on one side, far away from the steady flow ring, of the limiting device, and the spring piece is located between the piston ring and the limiting device. The utility model is used for solve present buffer structure and produce the technical problem of noise at the during operation easily.

Description

Shock absorber strenghthened type recovers hydraulic buffer structure

Technical Field

The utility model belongs to the technical field of the shock absorber, concretely relates to shock absorber strenghthened type recovers hydraulic buffer structure.

Background

The hydraulic buffer structure for restoring shock absorber is a hydraulic buffer device placed in the interior of working cylinder of shock absorber. It is designed by using the damping effect of the throttling hole on oil. In the recovery work of the shock absorber, when the floating piston enters the buffer cylinder sleeve, the floating piston expands outwards to form a closed space between the floating piston and the buffer cylinder sleeve, and oil forms a high-pressure area in the closed space to force the oil to pass through a throttling hole in the floating piston, so that the oil discharge resistance is increased, the movement speed of the piston rod is reduced, and the effect of reducing impact is achieved.

At present, the typical hydraulic shock absorber restoring buffering structure has some defects, and the problem of high noise easily occurs in work. Therefore, a buffer structure is urgently needed to solve the problem of loud noise in the use process.

SUMMERY OF THE UTILITY MODEL

To the not enough that exists among the prior art, the utility model aims to provide a hydraulic buffer structure is restoreed to shock absorber strenghthened type for solve present buffer structure and produce the technical problem of noise at the during operation easily.

In order to achieve the above purpose, the technical scheme of the utility model is that: a shock absorber enhanced type recovery hydraulic buffer structure is applied to a shock absorber and sleeved outside a piston rod with a step structure of the shock absorber, and comprises a buffer cylinder sleeve sleeved outside the piston rod and a buffer assembly sleeved outside the piston rod and capable of extending into the buffer cylinder sleeve in the working process, wherein the buffer assembly comprises a limiting stopper sleeved at the step of the piston rod, a stop ring fixedly connected to the piston rod, a flow stabilizing ring, a throttling sheet and a piston ring; the piston ring is sleeved outside the flow stabilizing ring, is positioned between the limiting device and the throttling sheet and can float in a reciprocating manner along the axial direction of the flow stabilizing ring; the buffer assembly further comprises a buffer cushion and a spring piece, the buffer cushion is sleeved outside the piston rod and is located at one side, away from the flow stabilizing ring, of the limiting stopper, and the spring piece is located between the piston ring and the limiting stopper.

Preferably, the inner wall of the buffer cylinder sleeve is provided with a plurality of leakage grooves which are identical in shape and different in size, and the spirit extending direction of each leakage groove is identical to the axial direction of the buffer cylinder sleeve.

Preferably, the leakage groove is in a pattern that gradually becomes wider from one end to the other end.

Preferably, the end of the stopper close to the step of the piston rod is cantilevered outwards along the circumferential direction to form a limiting protrusion, and the piston ring and the spring piece are located between the throttle plate and the limiting protrusion.

Preferably, the flow stabilizing ring is made of a powder metallurgy material.

Preferably, the piston ring is made of copper.

Adopt the utility model discloses technical scheme's beneficial effect does:

the spring piece is additionally arranged between the piston ring and the limiter, so that the impact effect of the piston ring on the limiter is reduced, and the noise generated when the buffer assembly works is further reduced; one side of keeping away from the stationary flow ring at the stopper sets up the cushion, can play the cushioning effect between stopper and guide holder, reduces the striking noise.

Drawings

FIG. 1 is a longitudinal cross-sectional view of an embodiment of an enhanced rebound hydraulic cushioning structure for a shock absorber;

FIG. 2 is a longitudinal cross-sectional view of a cushion cylinder sleeve of an embodiment of a shock absorber enhanced rebound hydraulic cushion structure;

FIG. 3 is a schematic view of a damper assembly of an exemplary embodiment of an enhanced rebound hydraulic cushioning structure for a shock absorber;

FIG. 4 is an exploded view of a damping assembly of an embodiment of an enhanced rebound hydraulic damping structure for a shock absorber.

In the figures 1-4, 1-piston rod, 2-guide seat, 3-working cylinder, 4-cushion cylinder sleeve, 4-1-leakage groove, 5-cushion, 6-limiter, 7-spring sheet, 8-current stabilizer ring, 9-piston ring, 10-throttle sheet and 11-stop ring.

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 some embodiments of the present invention, not all embodiments, and do not limit the scope of the present invention.

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.

In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, 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.

It should be noted that, the damping structure is applied to the shock absorber, and can reduce the noise in the working process of the shock absorber. The shock absorber comprises a working cylinder 3, through which working cylinder 3 a piston rod 1 is passed. The upper end of the buffer cylinder sleeve 4 is provided with a convex edge extending outwards, and the buffer cylinder sleeve 4 extends into the working cylinder 3 and can be erected at the upper end of the working cylinder 3 through the convex edge. A guide seat is arranged between the buffer cylinder sleeve 4 and the piston rod 1 to ensure that the piston rod 1 is coaxial with the buffer cylinder sleeve 4 and the working cylinder 3 all the time during working. The buffering component of the buffering structure is sleeved outside the piston rod 1 and can extend into the buffering cylinder sleeve 4 in the working process.

It should be noted that, the piston rod 1 is provided with a step structure, and the diameter of the lower part of the step structure is smaller than that of the upper part.

The specific embodiment is as follows:

embodiment 1, as shown in fig. 1 to 4, a shock absorber enhanced type rebound hydraulic cushion structure comprises a cushion cylinder sleeve 4 and a cushion assembly.

The buffering assembly comprises a limiter 6, a stop ring 11, a flow stabilizing ring 8, a throttle sheet 10, a piston ring 9, a buffering cushion 4 and a spring sheet 7. Specifically, the stopper 6 is sleeved on the piston rod 1, and the upper end of the stopper abuts against the step of the piston rod 1 from bottom to top. The stop ring 11 is fixedly connected to the piston rod 1 by welding and is located below the stopper 6. The current stabilizing ring 8 and the throttle plate 10 are arranged from top to bottom and are positioned between the stopper 6 and the stop ring 11, and the current stabilizing ring 8 and the throttle plate 10 are tightly pressed by the stopper 6 and the stop ring 11 without looseness. The outer edge of the throttling sheet 10 is provided with a throttling opening for oil to pass through.

More specifically, the side walls of the piston ring 9 are open to allow contraction and expansion, ensuring the space inside the cushioning structure to be closed and open. The piston ring 9 is sleeved outside the flow stabilizing ring 8, is positioned between the throttling sheet 10 and the limiter 6, and can float up and down.

More specifically, the spring piece 7 is provided between the piston ring 9 and the stopper 6, and functions to slow down the impact between the piston ring 9 and the stopper 6, thereby reducing the generation of noise. In this embodiment, the floating range of the piston ring 9 between the spring plate 7 and the throttle plate 10 is about 0.7 mm.

More specifically, the cushion pad 5 is sleeved on the piston rod 1 and above the stopper 6, and can play a role of buffering the impact between the stopper 6 and the guide seat 2, thereby reducing the working noise.

When the enhanced type restoring hydraulic buffering structure of the shock absorber is used, in a hydraulic buffering restoring stroke stage: the piston rod 1 drives the buffer assembly to do the restoration motion, when the piston ring 9 enters the buffer cylinder sleeve 4, the piston ring 9 expands outwards to enable the piston ring 9 to be tightly attached to the buffer cylinder sleeve 4, so that a closed space is formed in the upper cavity of the working cylinder 3, oil forms a high-pressure area in the closed space, the oil is forced to pass through a throttling opening in the throttling piece 10, damping force is generated, and the motion speed of the piston rod 1 is reduced. And as the piston rod continues to do the restoring motion, the restoring stroke is finished when the buffer soft cushion 5 is in the state of extremely limiting the pressure, and the hydraulic buffer structure stops working.

When in the hydraulic buffer compression stroke stage: the piston rod 1 drives the buffer assembly to do compression movement, the piston ring 9 contracts inwards to form a gap with the inner diameter of the buffer cylinder sleeve 4, meanwhile, the working plane at the lower end of the piston ring 9 is separated from the working plane of the throttling sheet 10 to form a gap, oil flows through the gap between the piston ring 9 and the buffer cylinder sleeve 4 and the gap between the piston ring 9 and the throttling sheet 10, and damping force generated by oil flowing at the position has no influence on compression damping force of the shock absorber.

In the above-mentioned resilience and compression stroke, spring leaf 7 plays cushioning effect between stopper 6 and piston ring 9, and cushion 5 plays cushioning effect between stopper 6 and guide holder 2, and then reduces the striking noise of above-mentioned two places to the purpose of the noise of realization reduction shock absorber in the course of the work.

Further, the inner wall of the cushion cylinder sleeve 4 is provided with a plurality of leakage grooves 4-1. The leakage grooves 4-1 have the same shape but different sizes. The leakage grooves 4-1 extend along the vertical direction. Therefore, the buffering force of the buffering structure at the initial stage of hydraulic buffering can be adjusted by adjusting the number, the depth and the length of the leakage grooves 4-1, and further the impact noise can be reduced.

In this embodiment, the leak groove 4-1 takes a drop-like structure which gradually widens from top to bottom.

In other embodiments, the length of the cushion cylinder sleeve can be adjusted as required to adjust the amount of work done in the hydraulic cushion process, and other structures are not described herein again.

Further, the upper end of the stopper 6 is cantilevered outward in the circumferential direction by a stopper projection. Specifically, the spring plate 7 is located below the limiting protrusion, the piston ring 9 is located below the spring plate 7, and the limiting protrusion limits the spring plate 7 and the piston ring 9.

Furthermore, the flow stabilizing ring 8 is made of powder metallurgy materials, and compared with the existing common polyurethane materials, the service life of the flow stabilizing ring is guaranteed. More specifically, the outer wall of the flow stabilizing ring 8 is provided with an unblocked hole extending up and down, so that the unblocked flow of oil liquid in the working process of the buffer structure is ensured.

Furthermore, the piston ring is made of copper, and compared with the conventional polyurethane material, the service life of the piston ring is ensured.

The present invention is described above with reference to the accompanying drawings, it is obvious that the present invention is not limited by the above-mentioned manner, and various insubstantial improvements made by the technical solution of the present invention or the present invention is directly applied to other occasions without improvement, all within the protection scope of the present invention.

Claims

1. A shock absorber enhanced type recovery hydraulic buffer structure is applied to a shock absorber and sleeved outside a piston rod with a step structure of the shock absorber, and comprises a buffer cylinder sleeve sleeved outside the piston rod and a buffer assembly sleeved outside the piston rod and capable of extending into the buffer cylinder sleeve in the working process, and is characterized in that the buffer assembly comprises a position limiter sleeved at the step of the piston rod, a stop ring fixedly connected to the piston rod, a flow stabilizing ring, a throttling sheet and a piston ring; the piston ring is sleeved outside the flow stabilizing ring, is positioned between the limiting device and the throttling sheet and can float in a reciprocating manner along the axial direction of the flow stabilizing ring; the buffer assembly further comprises a buffer cushion and a spring piece, the buffer cushion is sleeved outside the piston rod and is located at one side, away from the flow stabilizing ring, of the limiting stopper, and the spring piece is located between the piston ring and the limiting stopper.

2. The reinforced hydraulic buffer structure for the recovery of the shock absorber as recited in claim 1, wherein a plurality of leakage grooves having the same shape and different sizes are provided on the inner wall of the buffer cylinder sleeve, and the direction of the leakage grooves is the same as the axial direction of the buffer cylinder sleeve.

3. The shock absorber enhanced rebound hydraulic cushion structure as set forth in claim 2, wherein said leakage groove is in a pattern gradually widening from one end to the other end.

4. The shock absorber enhanced rebound hydraulic cushion structure as set forth in claim 1, wherein an end of said stopper near said step of said piston rod is cantilevered outward in a circumferential direction from a stopper projection, and said piston ring and said spring plate are located between said throttle plate and said stopper projection.

5. The hydraulic buffer structure for enhanced recovery of shock absorber according to claim 1, wherein said stabilizer ring is made of powder metallurgy.

6. The enhanced hydraulic buffer structure for shock absorber according to claim 1, wherein said piston ring is made of copper.