CN212225859U

CN212225859U - Bidirectional cylinder type shock absorber for automobile

Info

Publication number: CN212225859U
Application number: CN202020567498.0U
Authority: CN
Inventors: 赵振东
Original assignee: Nanjing Institute of Technology
Current assignee: Nanjing Institute of Technology
Priority date: 2020-04-16
Filing date: 2020-04-16
Publication date: 2020-12-25
Anticipated expiration: 2030-04-16

Abstract

The utility model discloses a car bidirectional action cylinder shock absorber, include: the oil storage cylinder comprises a connecting rod, a guide seat, a working cylinder barrel and an oil storage cylinder barrel, wherein the top end of the working cylinder barrel and the top end of the oil storage cylinder barrel are both connected with the guide seat, the bottom ends of the working cylinder barrel and the oil storage cylinder barrel are both connected with a lower support, and the outer diameter of the working cylinder barrel is smaller than the inner diameter of the oil storage cylinder barrel; the bottom end of the connecting rod is positioned in the working cylinder barrel, the bottom end of the connecting rod is connected with a damping assembly, and the top end of the connecting rod penetrates through the guide seat and is connected with the upper support; the top surface of the guide seat is provided with a groove, and a sealing ring is detachably connected in the groove; according to the invention, the elastic element and the piston are made of metal rubber, so that the requirements on the cleanliness of the shock absorber and the surface roughness of the connecting rod are greatly reduced, and the production cost is reduced; meanwhile, the device has the characteristics of reliable sealing, high/low temperature resistance, oil self-filtering regeneration function, simple structure and the like.

Description

Bidirectional cylinder type shock absorber for automobile

Technical Field

The utility model relates to the technical field of automobiles, concretely relates to car bidirectional action cylinder shock absorber.

Background

The automobile shock absorber is a main element generating damping force, and has the function of accelerating the attenuation of the vibration of an automobile body and a frame and improving the driving smoothness of an automobile. Currently, the shock absorbers used in automobiles are mainly double-acting cylinder hydraulic shock absorbers which are capable of acting in both compression and extension strokes, the damping force generated in the extension stroke being much greater than that generated in the compression stroke.

The traditional automobile shock absorber adopts single-edge or double-edge rubber as an oil seal, because the shock absorber is installed in an automobile chassis suspension system, the working environment is dirty, the fatigue life of at least 100 ten thousand times is generally required, in order to ensure the service life of a rubber sealing element, the cleanliness of the shock absorber and the surface roughness of a connecting rod are required to have special limit value standards, the cleanliness (mg) is required to be between 40+ S and 80+3S (S is the shock absorber stroke and is calculated by centimeter), and the surface roughness Ra of the connecting rod is less than or equal to 0.16 mu m. In order to achieve different damping forces of two-way strokes, a piston structure of the traditional shock absorber is provided with a stretching valve, a circulating valve and other structures which contain spiral springs with different elastic coefficients. Therefore, the traditional automobile shock absorber connecting rod has high process requirements on surface roughness processing, assembly cleanliness and the like, so that the production cost is high, and the defects of poor high/low temperature adaptability, complex piston structure and the like caused by a rubber sealing element exist.

Disclosure of Invention

An object of the utility model is to provide a car dual-action cartridge shock absorber to solve one of the above-mentioned multinomial defect or defect that leads to among the prior art.

In order to achieve the purpose, the utility model is realized by adopting the following technical scheme:

a dual-action tube shock absorber for a vehicle comprising: the oil storage cylinder comprises a connecting rod, a guide seat, a working cylinder barrel and an oil storage cylinder barrel, wherein the top end of the working cylinder barrel and the top end of the oil storage cylinder barrel are both connected with the guide seat, the bottom ends of the working cylinder barrel and the oil storage cylinder barrel are both connected with a lower support, and the outer diameter of the working cylinder barrel is smaller than the inner diameter of the oil storage cylinder barrel;

the bottom end of the connecting rod is positioned in the working cylinder barrel, the bottom end of the connecting rod is connected with a damping assembly, and the top end of the connecting rod penetrates through the guide seat and is connected with the upper support; the top surface of guide holder is equipped with the recess, can dismantle in the recess and be connected with the sealing ring.

Furthermore, an internal thread is arranged in a groove in the top surface of the guide seat, and the sealing ring is fixed in the groove through a ring nut.

Further, the shape of the sealing ring is C-shaped.

Further, the seal ring includes a housing and a metal rubber elastic member filled in the housing. Compared with rubber, the metal elastic rubber element not only has the same good elasticity and stronger damping performance as rubber, but also has the characteristics of high/low temperature resistance, corrosion resistance, difficult aging, radiation environment resistance and the like of metal materials.

Further, the housing has an open end having a length 1/3 of the overall length of the housing.

Furthermore, the damping assembly comprises an upper baffle and a lower baffle which are connected with the connecting rod, and a metal rubber piston is connected between the upper baffle and the lower baffle;

the metal rubber piston is provided with a first working state and a second working state, the far end of the metal rubber piston is attached to the lower baffle plate in the first working state, and the far end of the metal rubber piston is not attached to the lower baffle plate in the second working state.

Further, the outer diameter of the lower baffle, the outer diameter of the upper baffle and the outer diameter of the metal rubber piston are all smaller than the inner diameter of the working cylinder barrel. The friction between the periphery of the damping component and the inner ring of the working cylinder barrel is prevented, and the service life of the damping component is guaranteed.

Furthermore, the top surface of the metal rubber piston is step-shaped, the bottom surface of the metal rubber piston is parallel and level, the top surface of the metal rubber piston is connected with the upper baffle, and the bottom surface of the metal rubber piston is connected with the lower baffle. The top surface is designed to be step-shaped, the thickness of the far end is smaller than that of the near end, and when the metal rubber piston moves, the far end of the metal rubber piston can move up and down conveniently.

Furthermore, through holes are formed in the upper baffle and the lower baffle. The shape of the through hole can be square or round, and the area of the through hole at least occupies 2/3-3/4 of the area of the baffle plate, so that the liquid oil can smoothly circulate above and below the damping assembly.

Further, a dust cover is connected to the upper support. The installation of dust cover can reduce a large amount of dusts and fall into the surface of cylinder or connecting rod, has guaranteed the cleanliness on connecting rod surface.

According to the above technical scheme, the embodiment of the utility model has following effect at least:

1. according to the invention, the elastic element and the piston are made of metal rubber, so that the requirements on the cleanliness of the shock absorber and the surface roughness of the connecting rod are greatly reduced, and the production cost is reduced; meanwhile, the device has the characteristics of reliable sealing, high/low temperature resistance, oil self-filtering regeneration function, simple structure and the like;

2. in the invention, the metal rubber piston has a first working state and a second working state, when the metal rubber piston is stretched, the metal rubber piston is in the first working state, when the metal rubber piston is compressed, the metal rubber piston is in the second working state, and the metal rubber piston can be installed according to the requirements of the compression stroke damping force and the extension stroke damping force.

Drawings

FIG. 1 is a schematic view of the overall structure of an embodiment of the present invention;

FIG. 2 is a top view of a seal ring according to an embodiment of the present invention;

FIG. 3 is a schematic view of section A-A of FIG. 2;

FIG. 4 is a top view of a ring nut according to an embodiment of the present invention;

FIG. 5 is a schematic view of section B-B of FIG. 4;

FIG. 6 is a top view of a metal rubber piston according to an embodiment of the present invention;

FIG. 7 is a schematic view of section C-C of FIG. 6;

FIG. 8 is a front view of an upper baffle plate in accordance with an embodiment of the present invention;

FIG. 9 is a top view of an upper baffle plate in an embodiment of the present invention;

FIG. 10 is a front view of a lower baffle plate in an embodiment of the present invention;

FIG. 11 is a top view of a lower baffle plate in an embodiment of the present invention;

fig. 12 is a partial enlarged view at E in fig. 1.

Wherein: 1. a dust cover; 2. a connecting rod; 3. a guide seat; 4. a ring nut; 5. a seal ring; 51. a housing; 52. a metal rubber elastic element; 6. a working cylinder barrel; 7. an oil storage cylinder barrel; 8. an upper baffle plate; 9. a metal rubber piston; 10. a lower baffle plate; 11. and (6) mounting the nut.

Detailed Description

In order to make the technical means, creation features, achievement purposes and functions of the present invention easy to understand, the present invention is further described below with reference to the following embodiments.

It should be noted that, in the description of the present invention, the terms "front", "rear", "left", "right", "upper", "lower", "inner", "outer", etc. indicate the directions or positional relationships based on the directions or positional relationships shown in the drawings, and are only for convenience of description of the present invention but do not require the present invention to be constructed and operated in a specific direction, and thus, should not be construed as limiting the present invention. As used in the description of the present invention, the terms "front," "back," "left," "right," "up," "down" and "in" refer to directions in the drawings, and the terms "inner" and "outer" refer to directions toward and away from, respectively, the geometric center of a particular component.

As shown in fig. 1 to 12, the cylinder type shock absorber with the two-way action for the automobile comprises a connecting rod 2, a guide seat 3, a working cylinder barrel 6 and an oil storage cylinder barrel 7, wherein the top end of the working cylinder barrel 6 and the top end of the oil storage cylinder barrel 7 are connected with the guide seat, the bottom ends of the working cylinder barrel and the oil storage cylinder barrel are connected with a lower support, a sealing space in the cylinder barrel is formed, and the sealing space is used for containing liquid oil.

The outer diameter of the working cylinder barrel 6 is smaller than the inner diameter of the oil storage cylinder barrel 7; the bottom end of the connecting rod 2 is positioned in the working cylinder 6, the bottom end of the connecting rod 2 is connected with a damping component, and the top end of the connecting rod 2 penetrates through the guide seat 3 and is connected with the upper support; the top surface of guide holder 3 is equipped with the recess, can dismantle in the recess and be connected with sealing ring 5. The sealing ring 5 plays a sealing role and prevents the liquid oil in the working cylinder 6 from entering the upper part of the sealing ring. When the device is used, the upper support and the lower support are stressed to compress or stretch the connecting rod 2, the bottom end of the connecting rod 2 drives the damping component to move in the working cylinder barrel 6, and the damping component provides damping force to achieve the damping effect.

FIG. 1 is a block diagram of an embodiment of the present invention. The specific technical scheme is that the device comprises a dust cover 1, a connecting rod 2, a guide seat 3, a ring nut 4, a sealing ring 5, a working cylinder barrel 6, an oil storage cylinder barrel 7, an upper baffle plate 8, a metal rubber piston 9, a lower baffle plate 10 and a mounting nut 11. The working cylinder 6 and the oil storage cylinder 7 are welded with the guide seat 3 from inside to outside, the inner diameter D =30mm of the working cylinder 6, the dust cover 1 is welded with the upper end of the connecting rod 2, the sealing ring 5 is pressed on the guide seat 3 through a circular nut 4 in a threaded manner, the end face of the inner ring of the sealing ring 5 and the outer circular face of the connecting rod 2 form oil seal, and the lower end of the connecting rod 2 is respectively provided with an upper baffle 8, a metal rubber piston 9 and a lower baffle 10 which are tightly connected with the connecting rod 2 through a mounting nut 11.

As shown in fig. 2, the sealing ring 5 is a circular C-shaped, and the specific technical solution includes a housing 51 and a metal rubber elastic element 52, wherein the C-shaped housing is made of a polytetrafluoroethylene strip with a thickness of 0.3mm, a ratio of an opening length of the C-shaped housing to a bottom length of the sealing ring is L =1/3L, a height H1=3mm of the sealing ring, and the C-shaped housing 51 is provided with the metal rubber elastic element with a rectangular cross section formed by pressing. The metal rubber elastic element 52 is made of metal wires as raw materials through a certain process, has a spatial mesh-shaped linking structure similar to a rubber material, and has the characteristics of good elasticity and stronger damping performance similar to those of rubber, high/low temperature resistance, corrosion resistance, difficult aging, no fear of radiation environment and the like of the metal material compared with the rubber. Compared with a common rubber sealing element, the metal rubber sealing ring has lower requirements on the surface roughness of the connecting rod, the surface roughness Ra =0.32 μm, and the cleanliness (mg) of the damper requires 160+2S (S is the stroke of the damper and is calculated by centimeters), and meanwhile, the metal rubber sealing ring has better high and low temperature resistance and environmental adaptability than the traditional rubber sealing element.

The metal-rubber piston 9 shown in fig. 6 is formed by pressing metal rubber, and has an outer diameter D2=29mm and a thickness (i.e., height direction) H2=6mm, and is gradually thinned from a diameter 1/2 to an outermost end, and the thinnest portion has a thickness H3=3mm, and the thinned portion is located on the top surface of the metal-rubber piston 9. When the piston moves up and down along with the connecting rod 2, the oil of the shock absorber flows through the gap of the metal rubber piston 9 and the gap between the piston and the inner wall of the working cylinder 6 to form damping force. When the shock absorber is in a stretching working state, the metal rubber piston keeps in a state of being flatly attached to the lower baffle 10, a gap between the upper cavity and the lower cavity of the working cylinder 6 keeps unchanged, when the shock absorber is in a compressing working state, the far end (the end far away from the connecting rod is the far end, and the end close to the connecting rod is the near end) of the metal rubber piston 9 gradually winds up under the action of damping force, and a partial view of the end part of the piston is shown in figure 12, so that the gap between the metal rubber piston 9 and the inner wall of the working cylinder 6 is enlarged, and the shock absorber obtains smaller damping force on a compression stroke than on a stretching stroke. In addition, the metal rubber piston structure has the beneficial effects that the metal rubber piston structure has a filtering and regenerating function, particles or other impurities in oil of the shock absorber cannot block a plurality of metal rubber gaps, even a small amount of impurities are attached, regeneration (clearing away the impurity particles entering the gaps) can be realized due to bidirectional flow flushing of the oil, and the working capacity of the metal rubber piston cannot be influenced due to uncleanness of the oil of the shock absorber.

The upper baffle plate 8 shown in the attached fig. 8 to 9 and the lower baffle plate 10 shown in the attached fig. 10 to 11 are both made of medium carbon steel and have a thickness of 1 mm. Be equipped with circular through-hole on the baffle, the through-hole area accounts for 2/3 ~ 3/4 of baffle area to guarantee the smooth passing through of fluid. Wherein the outer diameter D3 of the upper baffle is equal to 1/2 of the outer diameter of the metal rubber piston, i.e. D3=14.5mm, and the outer diameter D4 of the lower baffle is equal to the outer diameter of the metal rubber piston, i.e. D4=29 mm.

The invention has the advantages that the sealing element and the piston which are made of metal rubber greatly reduce the requirements on the cleanliness of the shock absorber and the surface roughness of the connecting rod, and reduce the production cost. Meanwhile, the device has the characteristics of high/low temperature resistance, high reliability, oil self-filtering and regenerating functions, simple structure and the like.

The invention has another advantage that if the stretching stroke damping force is smaller than the compression stroke damping force, the positions of the upper baffle 8 and the lower baffle 10 are only required to be changed, the metal rubber piston 9 is installed in the up-down reverse direction, and the parts do not need to be replaced additionally, so that the shock absorber is simple and convenient, and the application range of the shock absorber product is enlarged.

It will be appreciated by those skilled in the art that the invention may be embodied in other specific forms without departing from the spirit or essential characteristics thereof. The embodiments disclosed above are therefore to be considered in all respects as illustrative and not restrictive. All changes which come within the scope of the invention or which are equivalent to the scope of the invention are embraced by the invention.

Claims

1. A dual-action tube shock absorber for an automobile comprising: the oil storage device comprises a connecting rod (2), a guide seat (3), a working cylinder barrel (6) and an oil storage cylinder barrel (7), wherein the top end of the working cylinder barrel (6) and the top end of the oil storage cylinder barrel (7) are connected with the guide seat (3), the bottom ends of the working cylinder barrel and the oil storage cylinder barrel are connected with a lower support, and the outer diameter of the working cylinder barrel (6) is smaller than the inner diameter of the oil storage cylinder barrel (7);

the bottom end of the connecting rod (2) is positioned in the working cylinder barrel (6), the bottom end of the connecting rod (2) is connected with a damping assembly, and the top end of the connecting rod (2) penetrates through the guide seat (3) and is connected with the upper support; the top surface of guide holder (3) is equipped with the recess, can dismantle in the recess and be connected with sealing ring (5).

2. A tube damper according to claim 1, characterized in that the guide shoe (3) is provided with an internal thread in a recess in its top face, in which recess the sealing ring (5) is fixed by means of a ring nut (4).

3. The cartridge damper according to claim 1, characterized in that the sealing ring (5) is C-shaped.

4. The cartridge shock absorber according to claim 1, characterized in that the sealing ring (5) comprises a housing (51) and a metal rubber elastic element (52), the metal rubber elastic element (52) being filled within the housing (51).

5. The tube damper according to claim 4, characterized in that the outer shell (51) has an open end having a length 1/3 of the overall length of the outer shell (51).

6. A tube shock absorber according to claim 1, wherein the damping assembly comprises an upper baffle (8) and a lower baffle (10) connected to the rod (2), a metal rubber piston (9) being connected between the upper baffle (8) and the lower baffle (10);

the metal rubber piston (9) is provided with a first working state and a second working state, the far end of the metal rubber piston (9) is attached to the lower baffle (10) in the first working state, and the far end of the metal rubber piston (9) is not attached to the lower baffle (10) in the second working state.

7. The tube shock absorber according to claim 6, characterized in that the outer diameter of the lower baffle (10), the outer diameter of the upper baffle (8) and the outer diameter of the metal rubber piston (9) are each smaller than the inner diameter of the working cylinder (6).

8. The tube damper according to claim 6, characterized in that the top surface of the metal rubber piston (9) is stepped and the bottom surface is flush, and the top surface of the metal rubber piston (9) is connected to the upper baffle (8) and the bottom surface is connected to the lower baffle (10).

9. The tube damper according to claim 6, characterized in that the upper baffle (8) and the lower baffle (10) are provided with through holes.

10. A tube damper according to claim 6, characterized in that a dust shield (1) is attached to the upper mount.