CN115492889A

CN115492889A - Novel compression buffer structure's bumper shock absorber and vehicle

Info

Publication number: CN115492889A
Application number: CN202211348171.4A
Authority: CN
Inventors: 杨华珍; 徐东; 周亚俊; 关向; 苏炽龙
Original assignee: Add Industry Zhejiang Corp ltd
Current assignee: Add Industry Zhejiang Corp ltd
Priority date: 2022-10-31
Filing date: 2022-10-31
Publication date: 2022-12-20

Abstract

The invention relates to the technical field of shock absorbers and discloses a shock absorber with a novel compression buffering structure and a vehicle, wherein the shock absorber with the novel compression buffering structure comprises an oil storage cylinder assembly, a shock absorber inner cylinder and a shock absorber bottom valve, a shock absorber piston rod is arranged in the shock absorber inner cylinder, a shock absorber piston valve and a hydraulic piston are mounted on the shock absorber piston rod, a hydraulic cylinder is arranged in the shock absorber inner cylinder, a buffering part is arranged on the hydraulic cylinder, a C cavity which is opened towards the hydraulic piston direction is arranged in the buffering part, the diameter of the buffering part is smaller than that of the shock absorber inner cylinder, and a pressure relief hole is formed in the inner wall of the C cavity; the minimum dead size can be designed under the same pressure working condition, and is shorter than the axial size of the occupied shock absorber; because the foaming polyurethane is not needed, the service life of the hydraulic buffer structure in the used cylinder is long and is longer than that of the shock absorber body; the oil liquid is utilized during buffering, friction noise is avoided, abrasion is reduced, and the performance of the shock absorber is better.

Description

Novel compression buffer structure's bumper shock absorber and vehicle

Technical Field

The invention relates to the technical field of shock absorbers, in particular to a shock absorber with a novel compression buffer structure and a vehicle.

Background

When the existing shock absorber structure is compressed to the bottom, the foamed polyurethane is arranged outside the shock absorbing cylinder (sleeved on the piston rod) for buffering, and the structure has the following defects: 1. the polyurethane buffer block is compressed to absorb energy, and a certain amount of dead size exists after compression, so that the shock absorber occupies a long axial size and needs to occupy a longer axial size; 2. the polyurethane buffer block gradually ages and loses elasticity under various use environments of vehicles, the buffering effect is influenced, and the service life of the polyurethane buffer block is generally shorter than that of the shock absorber body; 3. in the compression process, the inner diameter or the outer diameter of the polyurethane buffer block can rub against a mating piece, and abnormal sound can be generated when the oil film is lost; 4. the absorbed energy is small; the present application is proposed to address the above problems.

Disclosure of Invention

The invention aims to provide a shock absorber with a novel compression buffering structure, which is used for solving the problems of long axial dimension, short service life, low noise and low energy absorption in use of the existing shock absorber.

The invention is realized by the following technical scheme.

The shock absorber with the novel compression buffering structure comprises an oil storage cylinder assembly, a shock absorber inner cylinder and a shock absorber bottom valve, wherein a shock absorber piston rod is arranged in the shock absorber inner cylinder, a shock absorber piston valve and a hydraulic piston are mounted on the shock absorber piston rod, a hydraulic cylinder is arranged in the shock absorber inner cylinder, a buffering part is arranged on the hydraulic cylinder, a C cavity with an opening facing the hydraulic piston direction is arranged in the buffering part, the diameter of the buffering part is smaller than that of the shock absorber inner cylinder, a pressure relief hole is formed in the inner wall of the C cavity, an E cavity is formed between the oil storage cylinder assembly and the shock absorber inner cylinder, an A cavity is formed on the upper side of the shock absorber piston valve, a B cavity is formed between the shock absorber piston valve and the hydraulic cylinder, a D cavity is formed between the hydraulic cylinder and the shock absorber bottom valve, during shock absorption buffering, the hydraulic piston enters the C cavity, and oil in the C cavity enters the D cavity through the pressure relief hole, and buffering effect is achieved.

Furthermore, a check valve is arranged on the buffer part, and oil in the D cavity can enter the C cavity through the check valve.

Further, the check valve is arranged at the bottom position of the C cavity.

Furthermore, the hydraulic cylinder is provided with a connecting part, the connecting part is connected with the inner cylinder of the shock absorber, a transition cavity with the diameter larger than that of the cavity C is arranged in the connecting part, a communicating hole is formed in the inner wall of the transition cavity, and the cavity B and the cavity D can circulate without resistance due to the arrangement of the communicating hole.

Furthermore, the transition cavity is in inclined plane transition with the connection position of C chamber, the intercommunicating pore sets up on the inclined plane.

Furthermore, the communication holes are uniformly arranged on the inclined plane in a surrounding manner.

Furthermore, the pressure relief holes are uniformly arranged along the length direction of the inner wall of the cavity C.

Further, the diameter of the pressure relief hole is gradually reduced from the opening of the cavity C to the bottom.

Further, the hydraulic piston is not in contact with the hydraulic cylinder when the shock absorber is initially compressed.

A vehicle comprises the shock absorber with the novel compression buffering structure.

The invention has the beneficial effects that: the hydraulic buffer device is arranged on the inner cylinder of the shock absorber, so that the minimum dead size can be designed under the same pressure working condition, and the axial size of the shock absorber is shorter than that of the shock absorber; because the foaming polyurethane is not needed, the service life of the hydraulic buffer structure in the used cylinder is long and is longer than that of the shock absorber body; oil liquid is used during buffering, the buffering principle is hydraulic, friction noise is avoided, and abrasion is reduced; and the absorbable energy is far greater than the absorbable energy of the polyurethane buffer block adopted in the prior art in a hydraulic buffer mode, and the performance of the shock absorber is better.

Drawings

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

The invention is further illustrated by the following examples in conjunction with the drawings.

FIG. 1 is a schematic view of the overall structure of a shock absorber with a novel compression cushioning structure according to the present invention;

fig. 2 is a partial enlarged portion at X in fig. 1.

Detailed Description

The present invention is described in detail below with reference to fig. 1-2.

The invention relates to a shock absorber with a novel compression buffer structure, which comprises an oil storage cylinder assembly 7, a shock absorber inner cylinder 5 and a shock absorber bottom valve 6, wherein the shock absorber bottom valve 6 and an upper cover are respectively arranged at the bottom and the top of the oil storage cylinder assembly 7, a shock absorber piston rod 1 is arranged in the shock absorber inner cylinder 5, a shock absorber piston valve 2 and a hydraulic piston 3 are arranged on the shock absorber piston rod 1, a hydraulic cylinder 4 is arranged in the shock absorber inner cylinder 5, the shock absorber piston valve 2, the hydraulic piston 3 and the hydraulic cylinder 4 are sequentially arranged from top to bottom, a buffer part 40 is arranged on the hydraulic cylinder 4, a C cavity which is opened towards the hydraulic piston 3 is arranged in the buffer part 40, the diameter of the buffer part 40 is smaller than that of the shock absorber inner cylinder 5, a hole 41 is formed in the inner wall of the C cavity, an E cavity is formed between the oil storage cylinder assembly 7 and the shock absorber inner cylinder 5, an A cavity is formed on the upper side of the shock absorber piston valve 2, a B cavity is formed between the shock absorber piston valve 2 and the hydraulic cylinder 4, a D cavity is formed between the hydraulic cylinder 4 and the shock absorber bottom valve 6, and when buffering, oil enters the C cavity, and oil enters the C cavity through a pressure relief hole 41 to realize the effect of the buffering.

The hydraulic cylinder 4 is designed to have a large head and a small head, wherein the large head is a connecting part 43, the small head is a buffering part 40, the diameter of the connecting part 43 is the same as the inner diameter of the inner cylinder 5 of the shock absorber, and the connecting part 43 and the inner cylinder 5 of the shock absorber are connected by means of welding, riveting, threads and the like, and the hydraulic cylinder is suitable for being fixed on the inner cylinder of the shock absorber.

Be equipped with the transition chamber 44 that the diameter is greater than the C chamber in the connecting portion 43, be equipped with the intercommunicating pore 45 on the transition chamber 44 inner wall, the non-resistance circulation in B chamber and D chamber is realized in setting up of intercommunicating pore 45.

As shown in fig. 2, the connection position of the transition chamber 44 and the C chamber is a slope transition, and the communication hole 45 is provided on the slope, so that the oil flows in the pressure-receiving direction, and the flow resistance is reduced.

The buffer portion 40 is provided with a check valve 42, and the oil in the chamber D can enter the chamber C through the check valve 42, and preferably, the check valve 42 is arranged at the bottom position of the chamber C. After the power of external input bumper shock absorber was absorbed by pneumatic cylinder 4 completely, under the effect of outside spring force, bumper shock absorber piston rod 1 drove hydraulic piston 3 and toward stretching outward, and valve block flow direction B chamber on the bumper shock absorber piston valve 2 was backed up to A chamber fluid, and the D chamber was compensated by the E chamber to insufficient fluid in B chamber to open 4 bottom check valves of pneumatic cylinder flow direction C chambeies, break away from the influence of pneumatic cylinder when stretching the bumper shock absorber.

The design form of the check valve in the hydraulic cylinder is not limited to the design illustration, and the check valve is applicable as long as the function is the check valve.

Preferably, the communication holes 45 are provided in a plurality and uniformly arranged around the inclined plane.

Preferably, the pressure relief holes 41 are provided in a plurality and uniformly arranged along the length direction of the inner wall of the cavity C.

Preferably, as shown in fig. 2, the diameter of the pressure relief hole 41 is gradually reduced from the opening of the C cavity to the bottom, so that the damping resistance is linearly increased.

The shapes and distribution of the pressure relief holes 41 and the flow holes 45 are not limited to the design illustration, and the shapes are circular holes and square holes, and the distribution is vertical distribution, annular distribution and the like. The hydraulic cylinder is arranged between the piston valve and the bottom valve, and the hydraulic cylinder is suitable for use.

Preferably, when the shock absorber is initially compressed, the hydraulic piston 3 is not in contact with the hydraulic cylinder 4, and after the piston rod of the shock absorber reaches a certain displacement, the hydraulic piston 3 enters the hydraulic cylinder 4, so that the shock absorption comfort is improved under the working condition of slight shock absorption and buffering.

When the shock absorber is used, the shock absorber is consistent with a conventional shock absorber, hydraulic oil is filled in the cavity A, the cavity B, the cavity C and the cavity D, half oil is filled in the cavity E, the hydraulic piston 3 is connected with the shock absorber piston rod 1 and the shock absorber piston 2 and is arranged in the shock absorber inner cylinder 5, and the hydraulic piston 3 moves up and down along with the shock absorber piston rod 1.

When the shock absorber is initially compressed, the hydraulic piston 3 is not in contact with the hydraulic cylinder 4, the residual oil in the cavity B after the cavity A is compensated flows to the cavity D through the through hole 45 and the pressure relief hole 41 in the hydraulic cylinder 4, and flows to the cavity E after the valve plate on the shock absorber bottom valve 6 is pushed open, the force input into the shock absorber from the outside in the phase is gradually offset by the force of the oil pushing open the valve plate of the shock absorber bottom valve 6, and the hydraulic cylinder has no acting force.

When the bumper shock absorber compression was to the end, hydraulic piston 3 began to be the contact of buffer portion 40 with the 4 little first face of cylinder of pneumatic cylinder, B chamber fluid is isolated with the C chamber, the C chamber is isolated with the D chamber (check valve), B chamber fluid continues to flow to the D chamber through 45 through holes on the pneumatic cylinder 4, flow to the E chamber behind the 6 valve blocks of top open bumper shock absorber bottom valve, C chamber fluid passes through 41 through pressure release holes and flows to the D chamber in the pneumatic cylinder 4, flow to the E chamber again, through the size and the distribution that set up the pressure release holes, decide the pneumatic cylinder to the speed of offsetting of outside input power until disappearing slowly.

The power of external input bumper shock absorber is absorbed the back by pneumatic cylinder 4 completely, under the effect of outside spring force, bumper shock absorber piston rod 1 drives hydraulic piston 3 and toward stretching outward, valve block flow direction B chamber on the bumper shock absorber piston valve 2 is backed up to A chamber fluid, the B chamber is not enough fluid by the E chamber compensation to the D chamber, and open 4 bottom check valve flow direction C chambeies of pneumatic cylinder, break away from the influence of pneumatic cylinder when stretching the bumper shock absorber, D chamber fluid also flows to the B chamber through the runner hole on the pneumatic cylinder 4 simultaneously, the power of this stage external spring force input bumper shock absorber is backed up the power of valve block by fluid and is offset gradually, the pneumatic cylinder does not have the effort.

The above embodiments are merely illustrative of the technical ideas and features of the present invention, and the purpose thereof is to enable those skilled in the art to understand the contents of the present invention and implement the present invention, and not to limit the protection scope of the present invention. All equivalent changes and modifications made according to the spirit of the present invention should be covered within the protection scope of the present invention.

Claims

1. The utility model provides a novel compression buffer structure's bumper shock absorber which characterized in that: including storing oil cylinder assembly (7), bumper shock absorber inner tube (5) and bumper shock absorber bottom valve (6), be equipped with bumper shock absorber piston rod (1) in bumper shock absorber inner tube (5), install bumper shock absorber piston valve (2) and hydraulic piston (3) on bumper shock absorber piston rod (1), be equipped with pneumatic cylinder (4) in bumper shock absorber inner tube (5), be equipped with buffer (40) on pneumatic cylinder (4), be equipped with the orientation in buffer (40) hydraulic piston (3) direction open-ended C chamber, buffer (40) diameter is less than bumper shock absorber inner tube (5) diameter, pressure release hole (41) have been seted up on the C intracavity wall, form the E chamber between oil cylinder assembly (7) and bumper shock absorber inner tube (5), bumper shock absorber piston valve (2) upside forms the A chamber, bumper shock absorber piston valve (2) with form the B chamber between pneumatic cylinder (4), pneumatic cylinder (4) with form the D chamber between bumper shock absorber bottom valve (6), during the shock attenuation, hydraulic piston (3) get into in the C chamber, the pressure release in the C chamber passes through the buffer effect D, fluid (41) gets into.

2. The shock absorber with a novel compression buffering structure as claimed in claim 1, wherein: and a check valve (42) is arranged on the buffer part (40), and oil in the cavity D can enter the cavity C through the check valve (42).

3. The shock absorber with a novel compression buffering structure as claimed in claim 2, wherein: the check valve (42) is arranged at the bottom position of the C cavity.

4. The shock absorber of a novel compression cushioning structure as set forth in any one of claims 1 to 3, wherein: connecting portion (43) have on pneumatic cylinder (4), connecting portion (43) with bumper shock absorber inner tube (5) are connected, it is greater than to be equipped with the diameter in connecting portion (43) transition chamber (44) in C chamber, be equipped with on transition chamber (44) inner wall intercommunicating pore (45), the setting up of intercommunicating pore (45) is realized the B chamber with the non-resistance circulation in D chamber.

5. The shock absorber with a novel compression buffering structure as claimed in claim 4, wherein: the transition cavity (44) is in inclined plane transition with the connection position of the cavity C, and the communication hole (45) is formed in the inclined plane.

6. The shock absorber with a novel compression buffering structure as claimed in claim 5, wherein: the communicating holes (45) are provided with a plurality of communicating holes which are uniformly arranged on the inclined plane in a surrounding way.

7. The shock absorber of a new compression damping structure as claimed in any one of claims 1 to 3, 5 and 6, wherein: the pressure relief holes (41) are provided with a plurality of pressure relief holes which are uniformly arranged along the length direction of the inner wall of the cavity C.

8. The shock absorber with a novel compression buffering structure as claimed in claim 7, wherein: the diameter of the pressure relief hole (41) is gradually reduced from the opening of the cavity C to the bottom.

9. The shock absorber of a novel compression cushioning structure as set forth in claim 1 or 8, wherein: when the shock absorber is initially compressed, the hydraulic piston (3) is not in contact with the hydraulic cylinder (4).

10. A vehicle, characterized in that: the vehicle includes a shock absorber of a novel compression buffering structure of any one of claims 1 to 9.