CN216975639U

CN216975639U - Shock absorber and vehicle

Info

Publication number: CN216975639U
Application number: CN202123446897.5U
Authority: CN
Inventors: 余志明; 周拓; 王刚
Original assignee: BYD Co Ltd
Current assignee: BYD Co Ltd
Priority date: 2021-12-31
Filing date: 2021-12-31
Publication date: 2022-07-15
Anticipated expiration: 2031-12-31

Abstract

The utility model provides a shock absorber and a vehicle, wherein the shock absorber comprises an oil storage cylinder, wherein an oil storage cavity is arranged in the oil storage cylinder; the middle cylinder is arranged inside the oil storage cavity; the guide sleeve is sleeved on the top of the middle cylinder and is attached to the inner wall of the oil storage cylinder; the piston rod slides in the guide sleeve; the oil scraper ring is arranged inside the guide sleeve and is in sliding fit with the piston rod; the wave spring is abutted against the bottom of the oil scraper ring and is in clearance fit with the piston rod. This shock absorber can prevent the vehicle at the upper and lower drunkenness of the in-process scraper ring that traveles to reduce the abnormal sound that the drunkenness caused about the scraper ring, reduce the noise, improve the NVH performance of vehicle, promote the experience of traveling of vehicle.

Description

Shock absorber and vehicle

Technical Field

The utility model belongs to the technical field of automobile shock absorbers, and mainly relates to a shock absorber and a vehicle.

Background

The shock absorber is one of important parts of an automobile and is used for relieving impact of road bumping on an automobile body during the running process of the automobile.

In the prior art shock absorber, an oil reservoir and an intermediate cylinder are included, and the intermediate cylinder is disposed inside the oil reservoir. A piston rod is arranged in the middle cylinder, and a sealing element is arranged at the top of the oil storage cylinder. Damping oil is stored in the oil storage cylinder, and the sealing element is used for preventing the damping oil from leaking outwards. The oil scraper ring is sleeved on the outer wall of the piston rod and is in sliding fit with the piston rod, so that when the piston rod is continuously compressed and restored to move, only a small amount of oil is attached to the surface of the piston rod, and the possibility of oil leakage of the shock absorber is reduced.

However, when the shock absorber works, the piston rod can drive the oil scraper ring to move up and down, and the oil scraper ring can frequently impact the guide sleeve and the bearing, so that abnormal sound is caused, and the running experience of a vehicle is influenced.

Disclosure of Invention

In order to solve the above technical problems, a first object of the present invention is to provide a shock absorber.

In order to solve the above technical problem, a second object of the present invention is to provide a vehicle having the above shock absorber.

In order to achieve the first object, the information of the present application provides a shock absorber comprising an oil storage cylinder, wherein an oil storage chamber is arranged in the oil storage cylinder; the middle cylinder is arranged inside the oil storage cavity; the guide sleeve is sleeved on the top of the middle cylinder and is attached to the inner wall of the oil storage cylinder; the piston rod slides in the guide sleeve; the oil scraper ring is arranged inside the guide sleeve and is in sliding fit with the piston rod; the wave spring is abutted against the bottom of the oil scraper ring and is in clearance fit with the piston rod.

In the above scheme, the wave spring supports against the bottom of the oil scraper ring, when the piston rod continuously performs compression restoration motion, the piston rod can drive the oil scraper ring to move up and down, but because the wave spring is in clearance fit with the piston rod, the piston rod can not drive the wave spring to move up and down when performing compression restoration motion, when the piston rod drives the oil scraper ring to move up and down, the wave spring can slow down the trend of downward motion of the oil scraper ring, so that the oil scraper ring does not move down any more, and when the oil scraper ring moves up, the wave spring can be blocked by the baffle wall in the guide sleeve, and the oil scraper ring is prevented from continuing to move up. Therefore, the oil scraper ring is limited and cannot move up and down, and abnormal sound can be prevented from being generated.

The further scheme is that the oil scraper ring is in interference fit with the piston rod.

In a further aspect, the damper further includes a seal disposed on a top portion of the guide sleeve.

The further scheme is that the shock absorber further comprises a sliding bearing, the sliding bearing abuts against the bottom of the wave spring, and the sliding bearing is in sliding fit with the piston rod.

The further proposal is that a damping sleeve is arranged in the middle cylinder and is arranged on the outer wall of the piston rod.

The further scheme is that a limiting seat is arranged on the outer wall of the middle part of the piston rod and abuts against the bottom of the vibration damping sleeve.

The further scheme is that a bottom valve assembly is arranged at the bottom of the oil storage cylinder and comprises a bottom valve body and a bottom valve plate, and the bottom valve plate is fixed on the bottom valve body through a first fastening piece.

The piston assembly is arranged in the middle cylinder and comprises a piston and a piston valve plate, the piston valve plate is fixed on the piston through a second fastener, and the piston is mounted on the lower end of the piston rod.

In a further aspect, the damper further includes a shield cap disposed on a top portion of the seal.

The further proposal is that the shock absorber also comprises a spring disc which is arranged on the outer wall of the oil storage cylinder.

In order to achieve the second object, the vehicle provided by the utility model comprises the damper, and abnormal noise generated by up-and-down movement of the oil scraper ring in the running process can be reduced.

Drawings

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

FIG. 1 is a cross-sectional view of a shock absorber taken along an axial line in accordance with an embodiment of the present invention.

Fig. 2 is an enlarged view of a portion a in fig. 1.

Fig. 3 is a schematic structural diagram of a guide sleeve, a scraper ring and a wave spring provided in an embodiment of the present invention.

Fig. 4 is an enlarged view of a portion B in fig. 1.

Fig. 5 is an enlarged view of a portion C in fig. 1.

Fig. 6 is a schematic structural diagram of a wave spring according to an embodiment of the present invention.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the utility model and are not intended to limit the utility model.

It will be understood that when an element is referred to as being "secured to" or "disposed on" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or intervening elements may also be present.

It should be noted that the terms of orientation such as left, right, up and down in the embodiments of the present invention are only relative to each other or are referred to the normal use state of the product, and should not be considered as limiting.

Referring to fig. 1 and 2, the shock absorber provided by the utility model comprises an oil storage cylinder 1, a baffle cover 2, a sealing member 3, a guide sleeve 4, an oil scraper ring 5, a wave spring 6, a sliding bearing 7 and a piston rod 8, wherein an oil storage cavity 9 is arranged inside the oil storage cylinder 1, and a middle cylinder 10 is arranged inside the oil storage cavity 9. The oil reservoir 9 is used for storing damping oil. The guide sleeve 4 is sleeved on the top of the middle cylinder 10 and attached to the inner wall of the oil storage cylinder 1. The piston rod 8 slides within the guide sleeve 4. The oil scraper ring 5 is disposed inside the guide sleeve 4 and is in sliding engagement with the piston rod 8. The wave spring 6 is abutted against the bottom of the oil scraper ring 5, and the wave spring 6 is in clearance fit with the piston rod 8. The seal 3 is arranged on top of the guide sleeve 4. The flap 2 is arranged on top of the seal 3. The sealing member 3 is used for preventing the damping oil from leaking from the oil storage chamber 9, and the baffle cover 2 is used for preventing the sealing member 3 from being polluted by external impurities and protecting the inside of the oil storage cylinder 1.

Referring to fig. 3, the wave spring 6 abuts against the bottom of the oil scraper ring 5, when the piston rod 8 continuously performs compression recovery movement, the piston rod 8 drives the oil scraper ring 5 to move up and down, but because the wave spring 6 is in clearance fit with the piston rod 8, the piston rod 8 does not drive the wave spring 6 to move up and down when performing compression recovery movement, and when the piston rod 8 drives the oil scraper ring 5 to move up and down, the wave spring 6 can slow down the downward movement trend of the oil scraper ring 5, so that the oil scraper ring 5 does not move downward any more. An inwardly extending dam 41 is formed in the guide sleeve 4 and when the oil scraper ring 6 moves upward, it is stopped by the dam 41 in the guide sleeve 4 to prevent the oil scraper ring 5 from further moving upward. Thus, the oil scraper ring 5 is restricted from moving up and down, and abnormal noise can be prevented.

Referring to fig. 3 and 6, the oil scraper ring 5 is made of PTFE material. The oil scraper ring 5 and the piston rod 8 are in interference fit. Thus, the oil scraper ring 5 and the piston rod 8 can be fully contacted, the oil scraper ring 5 can scrape the damping oil on the piston rod 8, and the damping oil attached to the piston rod 8 is reduced. The wave spring 6 is in clearance fit with the piston rod 8, so that the wave spring 6 cannot be driven by the piston rod 8 to move together when the piston rod 8 moves up and down. The wave spring 6 thus prevents the tendency of the oil scraper ring 5 to move downwards.

When the piston rod 5 is compressed downward, an elastic element is selected to retard the downward movement tendency of the oil scraper ring 5. The wave spring 6 is selected as the elastic element because the wave spring 6 has small volume, thereby saving space and meeting the actual installation requirement of the shock absorber. And wave spring 6 has a clearance, can supply a small amount of damping oil to pass through, can play certain lubricated effect to sealing member 3, can prolong the life of sealing member 3.

Referring to fig. 1, a damping sleeve 11 is disposed inside the intermediate cylinder 10, and the damping sleeve 11 is sleeved on the outer wall of the piston rod 8. And a limiting seat 12 is arranged on the outer wall of the middle part of the piston rod 8, and the limiting seat 12 is abutted against the bottom of the damping sleeve 11. Because in the shock absorber, the stroke of the piston rod 8 needs to be limited, when the piston rod 8 moves upwards for a certain height, the limiting seat 12 is blocked by the guide sleeve 4, and the piston rod 8 can not move upwards any more, so that the stroke of the piston rod 8 can be limited. However, excessive impact may damage the guide sleeve 4, reducing the service life of the guide sleeve 4. To avoid this, a damping sleeve 11 is provided above the stopper base 12. The damping sleeve 11 is made of plastic and is used for slowing down the impact of the limiting seat 12 on the guide sleeve 4 in the process that the piston rod 8 makes upward recovery movement, and the service life of the guide sleeve 4 is prolonged.

Referring to fig. 5, a bottom valve assembly is provided at the bottom of the reservoir 1. The bottom valve assembly comprises a bottom valve body 13 and a bottom valve plate 14, and the bottom valve plate 14 is fixed on the bottom valve body 13 through a first fastening piece 15.

In the present embodiment, a base valve assembly is fixed to the bottom of the reservoir 1, mainly for generating compression damping. When the piston rod 8 makes a downward compression movement, the damping oil is compressed downward, the damping oil impacts the bottom valve plate 14 downward, and the bottom valve plate 14 generates an upward reaction force in the process that the damping oil impacts the bottom valve plate 14 downward, and the upward reaction force is a compression damping force. The compression damping force is used to damp vibrations generated in the vehicle body when the vehicle is running.

Referring to fig. 4, a piston assembly is disposed inside the intermediate cylinder 10, the piston assembly including a piston 16 and a piston blade 17, the piston blade 17 being fixed to the piston 16 by a second fastening member 18, the piston 16 being mounted on a lower end portion of the piston rod 8.

In this embodiment, the piston assembly moves up and down with the piston rod 8, primarily to produce restoring damping. When the piston rod 8 performs upward return movement, damping oil in the oil storage chamber 9 is accumulated upward. The damping oil flows back downwards under the action of the piston rod 8, the damping oil flowing back downwards generates an upward impact force on the piston 16, and a downward reaction force is generated in the process that the damping oil impacts the piston valve plate 17 upwards, and the downward reaction force is a restoring damping force. The restoring damping force is used to damp vibrations generated in the vehicle body while the vehicle is traveling.

Referring to fig. 1, the shock absorber provided by the present invention is for a vehicle, and further includes a bracket 19 and a spring holder 20. The bracket 19 is fixed at the bottom of the oil storage cylinder 1 and plays a role of bearing a shock absorber, and the bracket 19 is connected with wheels. While the spring plate 20 is used to carry the damper springs, which together with the damper reduce the vibrations of the vehicle body during driving. By the vehicle provided with the shock absorber, abnormal sound generated by up-and-down movement of the oil scraper ring can be reduced, noise is reduced, NVH performance of the vehicle is improved, and running experience of the vehicle is improved.

The present invention is not limited to the above preferred embodiments, and any modification, equivalent replacement or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A shock absorber, comprising:

the oil storage cylinder is internally provided with an oil storage cavity;

an intermediate cylinder disposed inside the oil reservoir chamber;

the guide sleeve is sleeved on the top of the middle cylinder and is attached to the inner wall of the oil storage cylinder;

the piston rod slides in the guide sleeve;

the oil scraper ring is arranged inside the guide sleeve and is in sliding fit with the piston rod;

the wave spring is abutted against the bottom of the oil scraper ring and is in clearance fit with the piston rod.

2. The shock absorber according to claim 1, wherein:

the oil scraper ring is in interference fit with the piston rod.

3. The shock absorber according to claim 1, wherein:

the shock absorber further comprises a seal disposed on top of the guide sleeve.

4. The shock absorber according to claim 1, wherein:

the shock absorber further comprises a sliding bearing, the sliding bearing is abutted against the bottom of the wave spring, and the sliding bearing is in sliding fit with the piston rod.

5. The shock absorber according to claim 1, wherein:

and a damping sleeve is arranged in the middle cylinder and is arranged on the outer wall of the piston rod.

6. The shock absorber according to claim 5, wherein:

and a limiting seat is arranged on the outer wall of the middle part of the piston rod and is abutted against the bottom of the vibration damping sleeve.

7. The shock absorber according to claim 1, wherein:

the bottom of the oil storage cylinder is provided with a bottom valve assembly, the bottom valve assembly comprises a bottom valve body and a bottom valve plate, and the bottom valve plate is fixed on the bottom valve body through a first fastening piece.

8. The shock absorber according to claim 1, wherein:

and a piston assembly is arranged in the middle cylinder and comprises a piston and a piston valve plate, the piston valve plate is fixed on the piston by a second fastener, and the piston is arranged at the lower end part of the piston rod.

9. The shock absorber according to claim 3, wherein:

the damper further includes a shield cap disposed on top of the seal.

10. The shock absorber according to claim 1, wherein:

the shock absorber further comprises a spring disc, and the spring disc is arranged on the outer wall of the oil storage cylinder.

11. A vehicle, characterized in that it comprises a shock absorber according to any one of claims 1-10.