Rebound limiting structure of automobile shock absorber

Abstract

The utility model relates to the technical field of automobile shock absorbers, in particular to a rebound limiting structure of an automobile shock absorber, which comprises an oil storage cylinder, a working cylinder, a piston rod, a guider, a spring and a buffer block, the piston rod is provided with a limiter, the spring and the buffer block are sequentially arranged between the guider and the limiter along the axial direction, and the limiter is arranged on the working cylinder. One end of the spring is fixed on one side of the guider, and the other end of the spring is fixed on the buffer block; the side edge of the buffer block is attached to the inner wall of the working barrel, an oil guide groove is formed in the side edge of the buffer block, an oil guide hole is formed in the position, axially overlapped with the limiting stopper, of the buffer block, and the oil guide groove and the oil guide hole axially penetrate through the buffer block. Through the combined design of the spring and the buffer block, impact force generated by the shock absorber in the springback process can be effectively absorbed and dispersed, the overall shock absorption effect is improved, and the stability and riding comfort of a vehicle are enhanced.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of automobile shock absorber, especially relates to a rebound limiting structure of automobile shock absorber. BACKGROUND

[0002] The shock absorber is mainly used for inhibiting the oscillation when the spring rebound after absorbing the shock and the impact from the road. When passing through the uneven road, although the shock-absorbing spring can filter the vibration of the road, the spring itself will still have reciprocating motion, and the shock absorber is used to inhibit this spring jumping. When the vehicle runs in the deceleration zone, road bridge or pothole section, the frame will often have a large amplitude of jolt, and the piston rod of the shock absorber will also have a large amplitude, and even the restoring spring of the shock absorber will be compressed to the limit state, causing mechanical collision and affecting the comfort of the vehicle.

[0003] The utility model discloses a kind of restoring buffer structures for C490 shock absorber, by setting hydraulic buffer block between limiter and restoring spring, if jolt amplitude is too large, then the hydraulic buffering force generated by hydraulic buffer block reduces amplitude, but the restoring spring in the restoring buffer structure is compressed, since the hydraulic buffering force generated by hydraulic buffer block increases the restoring time of restoring spring, restoring spring is still in compression state when next vibration comes, and the effect of shock absorption is reduced. UTILITY MODEL CONTENTS

[0004] The utility model aims at providing a kind of rebound limiting structure of automobile shock absorber, to solve the problems raised in the background art.

[0005] The above-mentioned purpose of the utility model is realized by the following technical scheme: a kind of rebound limiting structure of automobile shock absorber, including oil storage cylinder, working cylinder being arranged in the oil storage cylinder, piston rod being arranged in the working cylinder and guide being arranged in the end of the working cylinder, the piston rod is provided with limiter, further including spring and buffer block, the spring and buffer block are sequentially arranged between the guide and limiter along the axial direction, one end of the spring is fixed in the guide one side, and the other end is fixed on the buffer block;The side edge of the buffer block is attached to the inner wall of the working cylinder, guide oil groove is arranged on the side edge of the buffer block, guide oil hole is arranged at the position of the buffer block and the limiter axial overlap, the guide oil groove and guide oil hole are axially through the buffer block.

[0006] As preferred, the guide oil groove is multiple, and is circumferentially distributed on the buffer block.

[0007] As preferred, the limiter is provided with rebound pad, and the rebound pad is fixed on the side of the limiter towards the buffer block.

[0008] As preferred, the outer diameter of the rebound pad is smaller than the outer diameter of the limiter, and the oil guide hole is located in the outer circumference of the rebound pad.

[0009] As preferred, the rebound pad is made of an elastic body, and the side of the rebound pad towards the buffer block is provided with wave-shaped protrusions.

[0010] As preferred, the wave-shaped protrusions are annularly distributed and are distributed in radial directions.

[0011] As preferred, the piston rod is provided with a positioning groove, and the rebound pad is clamped with the positioning groove.

[0012] As preferred, the middle part of the rebound pad is provided with a sleeve hole, and the inner wall of the sleeve hole is provided with an annular clamping strip, which is clamped in the positioning groove.

[0013] The utility model discloses the beneficial effects of:

[0014] 1. The utility model discloses the combination design of spring and buffer block can effectively absorb and disperse the impact force produced in the rebound process of shock absorber, promotes the whole shock -absorbing effect, strengthens the stability and ride comfort of vehicle.

[0015] 2. The utility model discloses the oil guide hole is arranged in the axial overlapping part of buffer block and limiter, makes the oil flow speed of both sides of buffer block improve after limiter and buffer block separate, thereby improves the recovery speed of spring, improves the shock -absorbing effect. DRAWINGS

[0016] Figure 1 It is the structure schematic diagram of the utility model embodiment;

[0017] Figure 2 It is the structure schematic diagram of the buffer block in the utility model embodiment;

[0018] Figure 3 It is the structure schematic diagram of the rebound pad in the utility model embodiment;

[0019] Figure 4 It is Figure 1 The local enlarged view of A in the figure;

[0020] Figure 5 It is the structure schematic diagram of the spring in the utility model embodiment;

[0021] In the figure: 1 - oil storage cylinder, 2 - working cylinder, 3 - piston rod, 301 - positioning groove, 4 - guider, 5 - limiter, 6 - rebound pad, 601 - wave-shaped protrusion, 602 - sleeve hole, 603 - annular clamping strip, 7 - buffer block, 701 - oil guide groove, 702 - oil guide hole, 8 - spring. DETAILED DESCRIPTION

[0022] The utility model will be further explained in detail in combination with the drawings.

[0023] The embodiments are only an explanation of the utility model, and are not a limitation of the utility model, and a person skilled in the art can make a modification without creative contribution according to the need after reading the specification, but as long as in the utility model's right claim range, it is protected by the patent law.

[0024] Embodiment: as Figures 1-4 The utility model discloses a car shock absorber rebound limiting structure, including oil storage cylinder 1, the working cylinder 2 of setting in oil storage cylinder 1, the piston rod 3 of setting in working cylinder 2 and the guider 4 of setting in the end of working cylinder 2, the piston rod 3 is connected with the piston, and the limit stopper 5 is set up on the piston rod 3.

[0025] Spring 8 and buffer block 7 are arranged in working cylinder 2, and spring 8 and buffer block 7 are sequentially arranged between guider 4 and limit stopper 5 along the axial direction, one end of spring 8 is fixed on one side of guider 4, the other end is fixed on buffer block 7, and buffer block 7 is sleeved on piston rod 3.

[0026] The side edge of buffer block 7 is attached to the inner wall of working cylinder 2, a plurality of oil guide grooves 701 are arranged on the side edge of buffer block 7, and the oil guide grooves 701 are circumferentially distributed on buffer block 7.

[0027] A plurality of oil guide holes 702 are further arranged on buffer block 7, the oil guide holes 702 are located at the axial overlapping part of buffer block 7 and limit stopper 5, and the oil guide grooves 701 and the oil guide holes 702 axially penetrate buffer block 7.

[0028] A rebound pad 6 is arranged on the limit stopper 5, and the rebound pad 6 is fixed on the side of the limit stopper 5 facing buffer block 7. The outer diameter of the rebound pad 6 is smaller than the outer diameter of the limit stopper 5, and the oil guide holes 702 are located within the outer circumferential circle of the rebound pad 6. When the rebound pad 6 contacts the buffer block 7, the oil guide holes 702 are covered by the rebound pad 6.

[0029] As Figure 3 The rebound pad 6 is made of an elastomer, and the side facing the buffer block 7 is provided with a wave-shaped protrusion 601. The wave-shaped protrusion 601 is annularly distributed and is radially spaced.

[0030] A positioning groove 301 is arranged on the piston rod 3, and the rebound pad 6 is clamped with the positioning groove 301.

[0031] As Figure 3 And Figure 4As shown, the middle part of the rebound pad 6 is provided with a sleeve hole 602, the piston rod 3 is arranged in the sleeve hole 602, and the inner wall of the sleeve hole 602 is provided with an annular clamping strip 603 clamped in the positioning groove 301.

[0032] As shown, Figure 5 When the limiter 5 moves to the buffer block 7 and axially extrudes the buffer block 7, the interspace of the wavy protrusion 601 of the rebound pad 6 can flow the shock absorber oil, forming a first hydraulic buffer, reducing the impact between the limiter 5 and the buffer block 7. At the same time, the rebound pad 6 is extruded and deformed, and the oil guide hole 702 on the buffer block 7 is blocked, at this time only the oil can flow through the oil guide groove 701, the hydraulic buffer force is generated to reduce the amplitude, and the spring 8 is gradually compressed in the process; after the vibration ends, the limiter 5 is reset with the piston, at this time the limiter 5 is separated from the buffer block 7, the oil guide hole 702 is reconnected on both sides of the buffer block 7, and the oil in the working cylinder 2 can flow through the oil guide groove 701 and the oil guide hole 702 at the same time, greatly reducing the hydraulic buffer force and shortening the recovery time of the spring 8.

Claims

1. A rebound limiter structure for a vehicle shock absorber, comprising an oil reservoir (1), a working cylinder (2) disposed in the oil reservoir (1), a piston rod (3) disposed in the working cylinder (2), and a guide (4) disposed at an end of the working cylinder (2), wherein a limiter (5) is provided on the piston rod (3), characterized in that, Further comprising a spring (8) and a buffer block (7), which are arranged in sequence along the axial direction between the guide (4) and the stopper (5), one end of the spring (8) is fixed on one side of the guide (4), the other end is fixed on the buffer block (7); the side edge of the buffer block (7) is attached to the inner wall of the working cylinder (2), the side edge of the buffer block (7) is provided with an oil guide groove (701), the buffer block (7) and the stopper (5) are provided with an oil guide hole (702) at the overlapping part, the oil guide groove (701) and the oil guide hole (702) axially penetrate the buffer block (7).

2. The rebound stop structure for a shock absorber of a vehicle according to claim 1, characterized in that: The number of the oil guide groove (701) is multiple, which is distributed circumferentially on the buffer block (7).

3. The rebound stop structure for a vehicle shock absorber according to claim 1, characterized by: The stopper (5) is provided with a rebound pad (6), the rebound pad (6) is fixed on one side of the stopper (5) facing the buffer block (7).

4. The rebound stop structure for a vehicle shock absorber according to claim 3, characterized in that: The outer diameter of the rebound pad (6) is smaller than the outer diameter of the stopper (5), and the oil guide hole (702) is located in the outer circle of the rebound pad (6).

5. The rebound stop structure for a vehicle shock absorber according to claim 4, characterized by: The rebound pad (6) is made of elastomer, and the side of the rebound pad (6) facing the buffer block (7) is provided with a wavy protrusion (601).

6. The rebound stop structure for a vehicle shock absorber according to claim 5, characterized by: The wavy protrusion (601) is annularly distributed and radially spaced.

7. The rebound stop structure for a vehicle shock absorber according to claim 6, characterized by: The piston rod (3) is provided with a positioning groove (301), and the rebound pad (6) is clamped with the positioning groove (301).

8. The rebound stop structure for a vehicle shock absorber according to claim 7, characterized by: The rebound pad (6) is provided with a sleeve hole (602) in the middle, the inner wall of the sleeve hole (602) is provided with an annular clamping strip (603), and the annular clamping strip (603) is clamped in the positioning groove (301).

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