CN212775307U

CN212775307U - Variable damping shock absorber

Info

Publication number: CN212775307U
Application number: CN202021028026.4U
Authority: CN
Inventors: 宗毅猛; 杨梁; 王金刚; 黄东海; 李洋
Original assignee: Kuntye Vehicle System Changzhou Co Ltd
Current assignee: Kuntai Vehicle System Changzhou Co ltd
Priority date: 2020-06-05
Filing date: 2020-06-05
Publication date: 2021-03-23
Anticipated expiration: 2030-06-05

Abstract

The utility model discloses a variable damping shock absorber, which comprises a working cylinder, a guide sleeve assembly and a valve bottom assembly, wherein the guide sleeve assembly and the valve bottom assembly are arranged at two ends of the working cylinder in a pressing way; the outer circumference of the working cylinder is provided with a middle cylinder, and the middle cylinder and the working cylinder are configured to define a sealed liquid inlet cavity; the middle cylinder is sleeved with an outer cylinder which is coaxial with the middle cylinder, the outer cylinder is matched with the working cylinder, the guide sleeve assembly, the valve bottom assembly and the middle cylinder to form a liquid storage cavity which is sealed relatively, and the liquid storage cavity is communicated with the damping cavity; an electromagnetic valve assembly is arranged on the outer barrel, an oil outlet of the electromagnetic valve assembly is communicated with the liquid storage cavity, and an oil inlet of the electromagnetic valve assembly is communicated with the liquid inlet cavity. The beneficial effects of the utility model are mainly embodied in that: the variable damping shock absorber has a specific structure, and can adjust the damping force of the shock absorber by adjusting the opening of the electromagnetic valve according to the driving road condition, so that the automobile can have a better damping effect under different road conditions, and the automobile can have higher comfort and safety under different road conditions.

Description

Variable damping shock absorber

Technical Field

The utility model relates to a bumper shock absorber technical field particularly, especially relates to a variable damping bumper shock absorber.

Background

With the development of economy and science and technology, automobiles have become the most important transportation means for people to go out. In the use of automobiles, safety and comfort are very important issues. The shock absorber is a key factor for ensuring the safety and comfort of the automobile.

The principle of the hydraulic shock absorber is that when the vehicle frame and the vehicle axle do reciprocating relative motion and the piston reciprocates in the cylinder of the shock absorber, oil in the shell of the shock absorber repeatedly flows into another cavity from the cavity through narrow holes. At the moment, the friction between the liquid and the inner wall and the internal friction of liquid molecules form damping force to vibration, so that the vibration energy of the automobile is converted into oil heat and then is dissipated to the atmosphere by the shock absorber, and the damping force of the existing shock absorber is kept constant, so that when the automobile meets a bumpy road surface, the shock absorber cannot adapt to the impact of the road surface, and the riding comfort is influenced.

SUMMERY OF THE UTILITY MODEL

The utility model aims at overcoming the not enough of prior art existence, provide a variable damping bumper shock absorber.

The purpose of the utility model is realized through the following technical scheme:

a variable damping shock absorber comprises a working cylinder, a guide sleeve assembly and a valve bottom assembly, wherein the guide sleeve assembly and the valve bottom assembly are arranged at two ends of the working cylinder in an interference press fit mode, a piston valve system capable of moving up and down relative to the guide sleeve assembly is arranged on the guide sleeve assembly, and the piston end of the piston valve system extends into a damping cavity of the working cylinder; the outer circumferential surface of the working cylinder is sleeved with a middle cylinder in an interference manner, the middle cylinder and the working cylinder are configured to define a sealed liquid inlet cavity, and the liquid inlet cavity is communicated with the damping cavity through an oil inlet hole which is formed in the working cylinder and positioned above the piston end; the middle cylinder is sleeved with an outer cylinder which is coaxial with the middle cylinder, the outer cylinder is matched with the working cylinder, the guide sleeve assembly, the valve bottom assembly and the middle cylinder to form a liquid storage cavity which is sealed relatively, and the liquid storage cavity is communicated with the damping cavity through a flow channel formed in the valve bottom assembly; and an oil outlet of the electromagnetic valve assembly is communicated with the liquid storage cavity, and an oil inlet of the electromagnetic valve assembly is communicated with the liquid inlet cavity.

Preferably, clamping grooves are formed in two ends of the inner circumferential surface of the middle cylinder, a sealing ring I is embedded into each clamping groove, and the sealing ring I is tightly sleeved on the working cylinder.

Preferably, the length of the working cylinder is greater than or equal to the length of the intermediate cylinder.

Preferably, the middle cylinder is provided with a small-diameter opening, and the outer cylinder is provided with a large-diameter opening; the electromagnetic valve assembly at least comprises an electromagnetic valve seat welded on the outer cylinder and positioned outside the large-diameter opening and a nozzle seat welded on the middle cylinder and positioned outside the small-diameter opening, an electromagnetic valve matched with the electromagnetic valve seat is arranged in the electromagnetic valve seat, the central axes of the electromagnetic valve, the small-diameter opening and the large-diameter opening are coaxial, and the oil inlet end of the electromagnetic valve can extend into the nozzle seat and is in tight fit with the nozzle seat; the oil outlet end of the electromagnetic valve is communicated with the large-diameter opening.

Preferably, a sealing ring II is sleeved on the oil inlet end of the electromagnetic valve and is tightly attached to the nozzle base.

Preferably, the solenoid valve disk seat inside callipers is equipped with a spacing ring, the oil inlet end of solenoid valve runs through the spacing ring extends to be arranged in the mouth seat, the opening has still been seted up on the spacing ring, the hydraulic oil of the oil outlet end of solenoid valve flows back to through the opening in the stock solution intracavity.

Preferably, four oil inlet holes are formed in the working cylinder.

Preferably, the guide sleeve assembly is tightly matched with the inner wall of the outer barrel, and an oil seal is further arranged at the top of the guide sleeve assembly in a buckled mode.

Preferably, the middle cylinder is sleeved on the outer circumferential surface of the working cylinder, and two ends of the middle cylinder are in interference press fit with the working cylinder.

The beneficial effects of the utility model are mainly embodied in that:

1. compared with the prior art, the variable damping shock absorber has a specific structure, and the damping force of the shock absorber can be adjusted by adjusting the opening degree of the electromagnetic valve according to the driving road condition, so that the automobile can have a better shock absorption effect under different road conditions, and the automobile can have higher comfort and safety under different road conditions;

2. the working cylinder and the middle cylinder are in interference press fit, sealing can be realized without argon arc welding, the assembly process is simple, a large number of complex processing steps are omitted, and the processing cost is saved;

3. compared with the prior art, the working cylinder, the middle cylinder and the outer cylinder are more guaranteed in concentricity and more stable in quality by adopting the structure, so that the failure rate of the shock absorber is reduced;

4. the guide sleeve assembly and the valve bottom assembly used by the variable damping shock absorber are consistent with the guide sleeve assembly and the valve bottom assembly which are generally used in the market in structure, and have wide applicability.

Drawings

The technical scheme of the utility model is further explained by combining the attached drawings as follows:

FIG. 1: the structure of the utility model is schematically shown in the preferred embodiment;

FIG. 2: an enlarged view of portion a in fig. 1.

Detailed Description

The present invention will be described in detail below with reference to specific embodiments shown in the drawings. However, these embodiments are not limited to the present invention, and structural, method, or functional changes made by those skilled in the art according to these embodiments are all included in the scope of the present invention.

In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like, indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are used merely for convenience of description and for simplicity of description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore, should not be construed as limiting the present invention. Furthermore, the terms "first", "second", etc. are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first," "second," etc. may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless otherwise specified.

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 by those of ordinary skill in the art through specific situations.

The present invention will be described in detail below with reference to the accompanying drawings in conjunction with embodiments.

As shown in fig. 1 to 2, the utility model discloses a variable damping shock absorber, including at the bottom of the uide bushing assembly 2 and the valve assembly 3 at its both ends of working cylinder 1 and interference pressure equipment, assembly 3 is unanimous with the structure of general uide bushing assembly and valve assembly on the market at the bottom of uide bushing assembly 2 and the valve, and the apolegamy of being convenient for has wider suitability. In addition, because the uide bushing assembly 2 is prior art with the valve end assembly 3, so the utility model discloses do not do too much repeated description here.

In this embodiment, be equipped with a piston valve system 4 that can move about from top to bottom relative to it on the uide bushing assembly 2, piston valve system 4 includes integrated into one piece's piston rod 42 and at the piston end 41 of its one end, piston end 41 extends to be arranged in the damping chamber 12 of working cylinder 1, piston valve system 4 is prior art, therefore the utility model discloses do not describe here any more. And an oil seal 8 is further arranged on the piston valve system 4, the oil seal 8 is buckled on the guide sleeve assembly 2, and the guide sleeve assembly 2 is tightly matched with the inner wall of the outer barrel 5. The oil seal 8 can prevent hydraulic oil in the damping cavity 12 from leaking out, and a good sealing effect is achieved.

The design points of the utility model lie in: the outer circumference of the working cylinder 1 is sleeved with a middle cylinder 6, and two ends of the middle cylinder 6 are in interference press-fitting with the working cylinder 1. In a preferred embodiment, the length of the working cylinder 1 is greater than or equal to the length of the intermediate cylinder 6. In this design the cooperation mode that working cylinder 1 and middle section of thick bamboo 6 adopted the interference to impress need not argon arc welding, can realize sealing, and assembly process is simple, saves a large amount of loaded down with trivial details processing steps, saves the processing cost, and simultaneously, the concentricity of working cylinder and middle section of thick bamboo is more guaranteed, and the quality is more stable to reduce the fault rate of bumper shock absorber. In addition, the guide sleeve assembly 2 and the valve bottom assembly 3 only need to be pressed into the working cylinder 1 between the working cylinder 1 and the middle cylinder 6, the pressing between the working cylinder 1 and the middle cylinder 6 is not needed, the installation is rapid, and the working efficiency is greatly improved. If the working cylinder 1 and the middle cylinder 6 need to be pressed, the central axes of the working cylinder 1 and the middle cylinder 6 cannot be coincident, so that the installation is difficult, and faults are easily caused.

In the above, the intermediate cylinder 6 and the working cylinder 1 are configured to define a sealed liquid inlet chamber 11, and the liquid inlet chamber 11 is communicated with the damping chamber 12 through an oil inlet hole 13 formed in the working cylinder 1 above the piston end 41. Preferably, seted up four on the working cylinder 1 the inlet port 13, of course, the inlet port 13 of other quantity of also seting up adjusts according to the actual demand, all belongs to the utility model discloses a protection category does not do too much and give unnecessary details here. Furthermore, clamping grooves 61 are formed in two ends of the inner circumferential surface of the middle cylinder 6, a sealing ring I62 is embedded into each clamping groove 61, and the sealing ring I62 is tightly sleeved on the working cylinder 1. The setting of sealing washer I62 can prevent the hydraulic oil in the feed liquor chamber 11 leaks, plays sealed effect.

The utility model discloses in, the cover is equipped with an urceolus 5 coaxial with it on the middle section of thick bamboo 6, uide bushing assembly 2 with the inner wall at 5 both ends of urceolus is hugged closely. And the outer cylinder 5 is matched with the working cylinder 1, the guide sleeve assembly 2, the valve bottom assembly 3 and the middle cylinder 6 to form a relatively sealed liquid storage cavity 51, and the liquid storage cavity 51 is communicated with the damping cavity 12 through a flow channel (not shown in the figure) arranged on the valve bottom assembly 3.

The outer barrel 5 is also provided with a solenoid valve assembly 7 for controlling the oil quantity of the hydraulic oil, the oil outlet of the solenoid valve assembly 7 is communicated with the liquid storage cavity 51, and the oil inlet thereof is communicated with the liquid inlet cavity 11. Specifically, a small-diameter opening 63 is formed in the middle barrel 6, and a large-diameter opening 52 is formed in the outer barrel 5; solenoid valve assembly 7 is at least including the welding be located the solenoid valve seat 71 in the major diameter opening 52 outside and welding on urceolus 5 be located on the middle section of thick bamboo 6 the mouth seat 72 in the minor diameter opening 63 outside, the preferred carbon dioxide protection of the welding mode of mouth seat 72 and solenoid valve seat 71 welds, certainly, also can be other mode welding, all belongs to the utility model discloses a protection category does not do too much here and gives unnecessary details.

The electromagnetic valve seat 71 is internally provided with an electromagnetic valve 73 matched with the electromagnetic valve seat, and the electromagnetic valve 73 is electrically connected with a mode switch arranged in a vehicle. In the above, the central axes of the solenoid valve 73, the small diameter opening 63 and the large diameter opening 52 are coaxial, the oil inlet 731 of the solenoid valve 73 can extend into the nozzle seat 72 and be tightly fitted therewith, and the oil outlet 732 of the solenoid valve 73 is communicated with the large diameter opening 52. Furthermore, a limiting ring 75 is clamped in the electromagnetic valve seat 71, the oil inlet 731 of the electromagnetic valve 73 penetrates through the limiting ring 75 and extends into the nozzle seat 72, a sealing ring ii 74 is sleeved on the oil inlet 731 of the electromagnetic valve 73, and the sealing ring ii 74 is tightly attached to the nozzle seat 72. An opening 751 is further formed in the limiting ring 75, and hydraulic oil at the oil outlet end 732 of the electromagnetic valve 73 flows back into the reservoir chamber 51 through the opening 751.

The variable damping shock absorber disclosed by the invention has a specific structure, and the damping force of the shock absorber can be adjusted by adjusting the opening degree of the electromagnetic valve according to the driving road condition, so that the automobile can have a better shock absorption effect under different road conditions, and the automobile can have higher comfort and safety under different road conditions. Specifically, the utility model discloses a variable damping bumper shock absorber can adjust under three kinds of modes of motion, comfortable and standard, will illustrate below by way of example, like to the car of motion style partially, the travelling comfort will be his short slab, the utility model discloses an adjust mode switch, adjust this bumper shock absorber damping force, let the vehicle take the travelling comfort and promote.

The working process of the utility model is simply explained as follows:

when the piston valve system 4 performs a compression movement downwards, the hydraulic oil in the damping chamber 12 overflows into the liquid inlet chamber 11 through the oil inlet 13, as the oil amount of the hydraulic oil in the liquid inlet chamber 11 increases slowly and the pressure increases, the hydraulic oil is delivered into the electromagnetic valve 73 through the small-diameter opening 63, the left valve system of the electromagnetic valve 73 is opened by the continuous delivery of the hydraulic oil to form liquid flow, the current input at the right end of the electromagnetic valve 73 is converted into electromagnetic force to push the valve system at the right end of the electromagnetic valve 73, when the left end input liquid pressure and the right end electromagnetic pressure of the electromagnetic valve 73 are the same, the flow passage of the electromagnetic valve 73 reaches an intermediate state, when the electromagnetic pressure is greater than the liquid pressure, the left end of the flow passage of the electromagnetic valve 73 is difficult to be in an open state, the liquid directly flows out through an overflow valve in the electromagnetic valve 73, and at the moment, the flow passage in the electromagnetic valve 73 reaches a minimum state. As the piston end 41 applies pressure to the hydraulic oil stored in the damping chamber 12 below the piston end 41, the hydraulic oil stored in the damping chamber 12 below the piston end 41 flows back to the reservoir chamber 51 through the flow passage on the valve bottom assembly 3. When the piston valve system 4 is stretched upward, the flow of hydraulic oil is similar to the above-mentioned compression, and the description thereof is omitted.

It should be understood that although the present description refers to embodiments, not every embodiment contains only a single technical solution, and such description is for clarity only, and those skilled in the art should make the description as a whole, and the technical solutions in the embodiments can also be combined appropriately to form other embodiments understood by those skilled in the art.

The above list of details is only for the practical implementation of the present invention, and they are not intended to limit the scope of the present invention, and all equivalent implementations or modifications that do not depart from the technical spirit of the present invention should be included in the scope of the present invention.

Claims

1. Variable damping bumper shock absorber, its characterized in that: the hydraulic control valve comprises a working cylinder (1), and a guide sleeve assembly (2) and a valve bottom assembly (3) which are arranged at two ends of the working cylinder in an interference press fit manner, wherein a piston valve system (4) capable of moving up and down relative to the guide sleeve assembly (2) is arranged on the guide sleeve assembly (2), and a piston end (41) of the piston valve system (4) extends into a damping cavity (12) of the working cylinder (1);

the outer circumferential surface of the working cylinder (1) is sleeved with a middle cylinder (6), the middle cylinder (6) and the working cylinder (1) are configured to define a sealed liquid inlet cavity (11), and the liquid inlet cavity (11) is communicated with the damping cavity (12) through an oil inlet hole (13) which is formed in the working cylinder (1) and is positioned above the piston end (41);

the middle cylinder (6) is sleeved with an outer cylinder (5) which is coaxial with the middle cylinder, the outer cylinder (5) is matched with the working cylinder (1), the guide sleeve assembly (2), the valve bottom assembly (3) and the middle cylinder (6) to form a liquid storage cavity (51) which is relatively sealed, and the liquid storage cavity (51) is communicated with the damping cavity (12) through a flow channel formed in the valve bottom assembly (3);

an electromagnetic valve assembly (7) is arranged on the outer barrel (5), an oil outlet of the electromagnetic valve assembly (7) is communicated with the liquid storage cavity (51), and an oil inlet of the electromagnetic valve assembly is communicated with the liquid inlet cavity (11).

2. The variable damping shock absorber according to claim 1, wherein: clamping grooves (61) are formed in two ends of the inner circumferential surface of the middle cylinder (6), a sealing ring I (62) is embedded into each clamping groove (61), and the sealing ring I (62) is tightly sleeved on the working cylinder (1).

3. The variable damping shock absorber according to claim 1, wherein: the length of the working cylinder (1) is greater than or equal to that of the intermediate cylinder (6).

4. The variable damping shock absorber according to claim 1, wherein: a small-diameter opening (63) is formed in the middle barrel (6), and a large-diameter opening (52) is formed in the outer barrel (5); the electromagnetic valve assembly (7) at least comprises an electromagnetic valve seat (71) welded on the outer cylinder (5) and positioned outside the large-diameter opening (52) and a nozzle seat (72) welded on the middle cylinder (6) and positioned outside the small-diameter opening (63), an electromagnetic valve (73) matched with the electromagnetic valve seat (71) is arranged in the electromagnetic valve seat (71), the central axes of the electromagnetic valve (73), the small-diameter opening (63) and the large-diameter opening (52) are coaxial, and an oil inlet end (731) of the electromagnetic valve (73) can be arranged in the nozzle seat (72) in an extensible mode and in tight fit with the nozzle seat; an oil outlet end (732) of the solenoid valve (73) communicates with the large-diameter opening (52).

5. The variable damping shock absorber according to claim 4, wherein: and a sealing ring II (74) is sleeved on the oil inlet end (731) of the electromagnetic valve (73), and the sealing ring II (74) is tightly attached to the nozzle seat (72).

6. The variable damping shock absorber according to claim 4, wherein: the internal card of solenoid valve seat (71) is equipped with a spacing ring (75), oil inlet end (731) of solenoid valve (73) run through spacing ring (75) extend arrange in mouth seat (72), opening (751) have still been seted up on spacing ring (75), the hydraulic oil of the oil outlet end (732) of solenoid valve (73) flows back to in the stock solution chamber (51) through opening (751).

7. The variable damping shock absorber according to claim 1, wherein: the working cylinder (1) is provided with four oil inlet holes (13).

8. The variable damping shock absorber according to claim 1, wherein: the guide sleeve assembly (2) is tightly matched with the inner wall of the outer barrel (5), and an oil seal (8) is also pressed at the top of the guide sleeve assembly.

9. The variable damping shock absorber according to claim 1, wherein: the middle cylinder (6) is sleeved on the outer circumferential surface of the working cylinder (1), and two ends of the middle cylinder are in interference press mounting with the working cylinder (1).