CN212225859U - A kind of double-acting drum shock absorber for automobile - Google Patents

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

A kind of double-acting drum shock absorber for automobile

technical field

The utility model relates to the technical field of automobiles, in particular to an automobile two-way action cylinder shock absorber.

Background technique

Automobile shock absorber is the main component that generates damping force, and its function is to accelerate the attenuation of the vibration of the body and the frame, and improve the ride comfort of the car. At present, the shock absorbers used in automobiles are mainly double-acting cylinder hydraulic shock absorbers, which can work in both compression and tension strokes, and the damping force generated by the tension stroke is much larger than the damping force generated in the compression stroke. .

The traditional automobile shock absorber uses single-edge or double-edge rubber as the oil seal. Since the shock absorber is installed in the suspension system of the automobile chassis, the working environment is dirty, and generally requires at least 1 million fatigue life. The service life requires special limit standards for the cleanliness of the shock absorber and the surface roughness of the connecting rod. The general cleanliness (mg) requires between 40+S and 80+3S (S is the shock absorber stroke, calculated in centimeters), The surface roughness of the connecting rod is Ra≤0.16μm. In order to achieve different damping forces in the two-way stroke, the piston structure of the traditional shock absorber is provided with structures such as expansion valves and flow valves containing coil springs with different elastic coefficients. Therefore, the traditional automotive shock absorber connecting rod surface roughness processing, assembly cleanliness and other process requirements are high, resulting in high production costs, and there are also problems such as poor high/low temperature adaptability caused by rubber seals, and complex piston structures.

SUMMARY OF THE INVENTION

The purpose of the present utility model is to provide a double-acting drum type shock absorber for automobiles, so as to solve the above-mentioned defects or one of the defects caused in the prior art.

In order to achieve the above object, the utility model adopts the following technical solutions to realize:

A two-way action cylinder shock absorber for automobiles, comprising: 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, and the bottom Both ends are connected with the lower support, and the outer diameter of the working cylinder is smaller than the inner diameter of the oil storage cylinder;

The bottom end of the connecting rod is located in the working cylinder, and the bottom end of the connecting rod is connected with a damping component, and the top end of the connecting rod penetrates the guide seat and is connected with the upper support; the guide seat The top surface of the device is provided with a groove, and a sealing ring is detachably connected in the groove.

Further, an inner thread is provided in the groove on the top surface of the guide seat, and the sealing ring is fixed in the groove by a ring nut.

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

Further, the sealing ring includes a casing and a metal-rubber elastic element, and the metal-rubber elastic element is filled in the casing. Compared with rubber, metal elastic rubber components not only have the same good elasticity and stronger damping performance as rubber, but also have the characteristics of metal materials such as high/low temperature resistance, corrosion resistance, not easy to age, and not afraid of radiation environment.

Further, the casing has an open end, and the length of the open end is 1/3 of the total length of the casing.

Further, the damping assembly includes an upper baffle and a lower baffle connected to the connecting rod, and a metal rubber piston is connected between the upper baffle and the lower baffle;

The metal rubber piston has a first working state and a second working state. In the first working state, the distal end of the metal rubber piston is in contact with the lower baffle plate, and in the second working state , the distal end of the metal rubber piston and the lower baffle do not fit.

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. Prevent friction between the outer circumference of the damping component and the inner ring of the working cylinder to ensure its service life.

Further, the top surface of the metal rubber piston is stepped, and the bottom surface is flush, the top surface of the metal rubber piston is connected with the upper baffle plate, and the bottom surface is connected with the lower baffle plate. The top surface is designed in a stepped shape, and the thickness of the distal end is smaller than that of the proximal end, which facilitates the up and down movement of the distal end when the metal rubber piston moves.

Further, both the upper baffle and the lower baffle are provided with through holes. The shape of the through hole can be square or circular, and the area of the through hole occupies at least 2/3-3/4 of the area of the baffle plate, so as to ensure 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 the dust cover can reduce a large amount of dust falling into the outer surface of the cylinder or connecting rod, and ensure the cleanliness of the connecting rod surface.

According to the above technical solutions, the embodiments of the present utility model have at least the following effects:

1. The present invention adopts elastic elements and pistons made of metal rubber, which greatly reduces the requirements on the cleanliness of the shock absorber and the surface roughness of the connecting rod, and reduces the production cost; Oil self-filtration regeneration function, simple structure and so on;

2. In the present invention, the metal rubber piston has a first working state and a second working state. When stretching, the metal rubber piston is in the first working state, and when compressing, the metal rubber piston is in the second working state, which can be damped according to the compression stroke. The metal rubber piston can be installed according to the requirements of force and tensile stroke damping force. If the tensile stroke damping force needs to be smaller than the compression stroke damping force, it is only necessary to change the position of the upper and lower baffles, and the metal rubber piston can be installed up and down in reverse. There is no need to replace other parts, it is simple and convenient, and the scope of application of shock absorber products is improved.

Description of drawings

Fig. 1 is the overall structure schematic diagram of the specific embodiment of the present utility model;

Fig. 2 is the top view of the sealing ring in the specific embodiment of the present utility model;

Fig. 3 is the schematic diagram of A-A section in Fig. 2;

Fig. 4 is the top view of the ring nut in the specific embodiment of the utility model;

Fig. 5 is the schematic diagram of B-B section in Fig. 4;

Fig. 6 is the top view of the metal rubber piston in the specific embodiment of the utility model;

Fig. 7 is the schematic diagram of C-C section in Fig. 6;

8 is a front view of an upper baffle plate in a specific embodiment of the present invention;

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

10 is a front view of a lower baffle plate in a specific embodiment of the present invention;

11 is a top view of a lower baffle plate in a specific embodiment of the present invention;

FIG. 12 is a partial enlarged view of E in FIG. 1 .

Among them: 1. Dust cover; 2. Connecting rod; 3. Guide seat; 4. Ring nut; 5. Sealing ring; 51. Housing; 52. Metal rubber elastic element; 6. Working cylinder; 7. Oil storage cylinder 8. Upper baffle; 9. Metal rubber piston; 10. Lower baffle; 11. Installation nut.

Detailed ways

In order to make the technical means, creation features, achievement goals and effects of the present invention easy to understand and understand, the present invention will be further described below with reference to the specific embodiments.

It should be noted that, in the description of the present invention, the terms "front", "rear", "left", "right", "upper", "lower", "inner", "outer" and the like indicate the orientation or The positional relationship is based on the orientation or positional relationship shown in the accompanying drawings, and is only for the convenience of describing the present invention rather than requiring the present invention to be constructed and operated in a specific orientation, so it should not be construed as a limitation of the present invention. The terms "front", "rear", "left", "right", "upper" and "lower" used in the description of the present invention refer to the directions in the drawings, and the terms "inner" and "outer" respectively refer to the directions in the drawings. is the direction toward or away from the geometric center of a particular part.

As shown in Figures 1 to 12, a double-acting drum shock absorber for automobiles includes a connecting rod 2, a guide seat 3, a working cylinder tube 6 and an oil storage cylinder tube 7, and the top end of the working cylinder tube 6 and the oil storage cylinder tube 7 The top end of the cylinder is connected with the guide seat, and the bottom end is connected with the lower support, forming a sealed space in the cylinder, and the sealed space is used to hold the 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 located in the working cylinder barrel 6, and the bottom end of the connecting rod 2 is connected with a damping component, and the top end of the connecting rod 2 penetrates the guide seat 3 and the The upper supports are connected; the top surface of the guide seat 3 is provided with a groove, and a sealing ring 5 is detachably connected in the groove. The sealing ring 5 plays a sealing role to prevent the liquid oil in the working cylinder barrel 6 from entering into the upper part. When the device is in use, the upper support and the lower support are forced to compress or stretch the connecting rod 2, and the bottom end of the connecting rod 2 drives the damping component to move in the working cylinder 6, and the damping component provides the damping force to act as a shock absorber. Effect.

FIG. 1 is a structural diagram of an embodiment of the present invention. The specific technical scheme consists of 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 8, a metal rubber piston 9, and a lower baffle 10. , the installation of nut 11 composition. Among them, the working cylinder tube 6 and the oil storage cylinder tube 7 are welded with the guide seat 3 from the inside and the outside, the inner diameter of the working cylinder tube 6 is D=30mm, the dust cover 1 is welded with the upper end of the connecting rod 2, and the sealing ring 5 is passed through the ring nut. 4. The thread is press-fitted on the guide seat 3. The end face of the inner ring of the sealing ring 5 and the outer surface of the connecting rod 2 form an oil seal. The lower end of the connecting rod 2 is respectively equipped with an upper baffle 8, a metal rubber piston 9, and a lower baffle 10. , and is tightly connected with the connecting rod 2 through the installation nut 11 .

As shown in FIG. 2 , the sealing ring 5 is a circular C-type, and the specific technical scheme is composed of a shell 51 and a metal rubber elastic element 52, wherein the C-type shell is made of 0.3mm thick PTFE tape, and the C-type shell is made of PTFE tape. The ratio of the length of the opening to the length of the bottom of the sealing ring is l=1/3L, the height of the sealing ring is H1=3mm, and the C-shaped housing 51 is provided with a rectangular section elastic element pressed by metal rubber material. The metal-rubber elastic element 52 is made of metal wire through a certain process, and has a space network link structure similar to rubber material. Compared with rubber, it not only has the same good elasticity and stronger damping performance as rubber, but also It has the characteristics of high/low temperature resistance of metal materials, corrosion resistance, not easy to age, and not afraid of radiation environment. Compared with ordinary rubber seals, the metal rubber seal ring has lower requirements for the surface roughness of the connecting rod, the surface roughness Ra=0.32μm, and the cleanliness of the shock absorber (mg) requires 160+2S (S is the shock absorber stroke. , in centimeters), at the same time, the metal rubber sealing ring has better high and low temperature resistance and environmental adaptability than traditional rubber seals.

As shown in Figure 6, the metal rubber piston 9 is made of metal rubber, its outer diameter D2=29mm, its thickness (ie height direction) H2=6mm, and it gradually thins from 1/2 of its diameter to the outermost end , the thickness of the thinnest part is H3=3mm, and the thinned part is located on the top surface of the metal rubber piston 9. When the piston moves up and down with the connecting rod 2, the shock absorber oil flows through the gap of the metal rubber piston 9 itself and the gap between the piston and the inner wall of the working cylinder 6 to form a damping force. When the shock absorber is in the working state of tension, the metal rubber piston remains flat against the lower baffle plate 10, and the gap between the upper and lower chambers of the working cylinder 6 remains unchanged. When the shock absorber is in the working state of compression, the metal The distal end of the rubber piston 9 (the end far from the connecting rod is the distal end, and the end close to the connecting rod is the proximal end) will gradually roll up under the action of the damping force. The partial view of the end of the piston is shown in Figure 12, thereby increasing the size of the metal rubber piston 9 and the inner wall of the working cylinder 6, so that the shock absorber obtains a smaller damping force on the compression stroke than on the tensile stroke. In addition, the metal-rubber piston structure has the benefit of filtering and regenerating. Particles or other impurities in the shock absorber oil cannot block numerous metal-rubber gaps. Flow flushing can achieve regeneration (removal of impurity particles entering the gap), and the working ability of the metal rubber piston will not be affected by the uncleanness of the shock absorber oil.

The upper baffle 8 shown in FIGS. 8 to 9 and the lower baffle 10 shown in FIGS. 10 to 11 are all made of medium carbon steel with a thickness of 1 mm. The baffle is provided with circular through holes, and the area of the through holes accounts for 2/3 to 3/4 of the baffle area to ensure the smooth passage of oil. The outer diameter D3 of the upper baffle plate is equal to 1/2 of the outer diameter of the metal rubber piston, that is, D3=14.5mm, and the outer diameter D4 of the lower baffle plate is equal to the outer diameter of the metal rubber piston, that is, D4=29mm.

One advantage of the present invention is that the seal and the piston are made of metal rubber, which greatly reduces the requirements for the cleanliness of the shock absorber and the surface roughness of the connecting rod, and reduces the production cost. At the same time, it also has the characteristics of high/low temperature resistance, high reliability, oil self-filtration and regeneration function, and simple structure.

Another advantage of the present invention is that if the tension stroke damping force needs to be smaller than the compression stroke damping force, it is only necessary to change the positions of the upper baffle 8 and the lower baffle 10, and the metal rubber piston 9 can be installed up and down in reverse. It is necessary to replace parts separately, which is simple and convenient, and improves the scope of application of shock absorber products.

It can be known from the technical common sense that the present invention can be realized by other embodiments without departing from its spirit or essential characteristics. Accordingly, the above-disclosed embodiments are, in all respects, illustrative and not exclusive. All changes within the scope of the present invention or within the scope equivalent to the present invention are included in the present invention.

Claims (10)

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.

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