CN203348403U - A composite automobile front shock absorber assembly - Google Patents

Abstract

The utility model provides a composite automobile front shock absorber assembly, which belongs to the technical field of automobile parts. The invention solves the problems of poor vibration damping performance and reduced anti-distortion ability of the existing shock absorber due to poor oil fluidity at the bottom of the cylinder barrel. The composite automobile front shock absorber assembly includes a cylinder and a piston rod with a piston fixed at one end. And increase oil through the compression valve one of the resistance. The composite automobile front shock absorber assembly can improve the shock absorbing performance and anti-distortion ability.

Description

A composite automobile front shock absorber assembly

technical field

The utility model belongs to the technical field of auto parts, and relates to a composite type automobile front shock absorber assembly.

Background technique

Cars have become very popular and have become an indispensable means of transportation in life. With the improvement of living standards, people have put forward higher requirements for the comfort of car driving. When the car is running on the road, if it encounters a bumpy road, the shock-absorbing spring is generally used to absorb and filter the vibration of the road surface, but the shock-absorbing spring itself will reciprocate after being compressed, and the shock absorber is used to restrain the vibration of the spring. The shock when rebounding after shock absorption and the impact from the road surface can improve the ride comfort of the car.

The shock absorber is installed inside the suspension system of the car, one end of which is connected to the vehicle body, and the other end is connected to the frame. The structure of the shock absorber is generally that the piston rod with the piston is inserted into the cylinder, and the cylinder is filled with oil, and the piston has an orifice. , so that the oil in the two spaces separated by the piston can complement each other.

For example, China's practical new patent application (201020625491.6) discloses a front shock absorber for automobiles, which mainly includes a dust cover, an inline sleeve, a shock absorber, a flat washer, a spring washer, nuts, bolts, an external coupling sleeve, and a bearing retainer. Rings, bearings, coil spring upper seat components, rubber pads, front coil springs, crash pads and shock absorbers: shock absorbers include piston rods, working cylinders, pistons, extension valves, oil storage cylinders, compression valves, compensation valves, Circulation valve, guide seat, dust cover, oil seal; the dust cover is provided with an inline sleeve, the inline sleeve is provided with a vibration damping pad, the outer connection sleeve is provided with bolts, and the inline sleeve is sequentially provided with Flat washer, spring washer and nut, and one end of the damping pad is provided with a bearing retaining ring, a bearing, a coil spring upper seat assembly, a rubber pad and a front coil spring in sequence, and the shock absorber can increase the strength of the damping assembly without reducing the comfort sex. However, the heat generated by the friction between the piston and the cylinder wall of the shock absorber cannot be dissipated through the cylinder arm in time, and the heat dissipation performance is relatively poor.

In view of the above-mentioned heat dissipation problem, the current shock absorber adopts a double-tube structure, that is, the shock absorber has two inner and outer tubes, and the piston moves in the inner tube. Due to the entry and withdrawal of the piston rod, the volume of the oil in the inner tube increases and shrinks accordingly. Therefore, it is necessary to maintain the balance of oil in the inner cylinder by exchanging with the outer cylinder. However, the heat generated by the friction between the piston and the inner cylinder wall of this kind of shock absorber cannot be dissipated through the cylinder arm in time. For this reason, another kind of shock absorber has appeared. This shock absorber has a single-layer cylinder wall structure, and the piston rod It is a hollow structure with an opening at the insertion end, and a compression valve is fixedly connected to the open end of the piston rod. The hollow structure of the piston rod replaces the oil storage chamber formed by the double cylinder structure, so that the contact between the piston and the cylinder wall can be directly Dissipate the heat and reduce the oil temperature. However, because the shock absorber with this structure moves downward when the piston moves downward, the oil can only move upward under pressure, and the oil at the bottom of the cylinder is in a static state and cannot flow completely, which makes the damping performance worse. Reduced distortion resistance.

Contents of the invention

The purpose of the utility model is to solve the above-mentioned problems in the existing technology, and propose a composite automobile front shock absorber assembly, which can improve the vibration damping performance and anti-distortion ability.

The purpose of this utility model can be achieved through the following technical solutions: a composite automobile front shock absorber assembly, including a cylinder barrel filled with oil and a piston rod with a piston fixed at one end, the piston is inserted from the top of the cylinder barrel In the cylinder, the piston rod has an oil storage chamber that allows the oil to enter and exit, and the piston is provided with a valve body that allows the oil to pass through and increases the resistance of the oil to pass through. It is characterized in that the cylinder below the piston A compression valve 1 that allows oil to pass through and increases the resistance of oil to pass is fixedly connected.

The shock absorber suppresses the impact of the spring when the piston reciprocates up and down in the cylinder. The inner cavity of the cylinder forms four chambers through the piston, the compression valve and the oil storage chamber of the piston rod. When the piston moves down, the oil under the pressure of the piston flows partly through the valve body to the top of the cylinder barrel, and partly flows into the piston rod. The oil storage chamber, and part of it flows to the bottom of the compression valve 1 through the compression valve 1. This structure allows all the oil in the cylinder to flow, thereby improving the vibration damping performance. At the same time, the flowing oil can improve the shock absorber. anti-distortion ability.

In the above-mentioned composite automobile front shock absorber assembly, the bottom end of the cylinder is sealed by a cylindrical base, and a floating piston is arranged in the base, and a floating piston is provided between the outer peripheral surface of the floating piston and the inner wall of the base. There are sealing rings. The floating piston and the base form a closed cavity, which is filled with nitrogen gas. When the piston moves downward, part of the oil passes through the compression valve and impacts the floating piston together. The floating piston compresses the nitrogen gas and moves downward. The oil provides space to adjust the pressure inside the shock absorber, improve the damping characteristics, and improve the anti-distortion ability.

In the above-mentioned compound automobile front shock absorber assembly, the oil storage chamber is a hollow structure with an opening at the insertion end of the piston rod, and the opening end of the oil storage chamber is fixedly connected with a The oil passes through the resistance of the compression valve two. Compression valve 2 has the same structure as compression valve 1, which provides resistance to the passage of oil; due to the existence of the oil storage chamber of the piston rod, the cylinder only needs a single wall, thereby improving the heat dissipation performance.

In the aforementioned composite automobile front shock absorber assembly, the compression valve 1 and the compression valve 2 are respectively fixedly connected to the cylinder barrel and the piston rod by clamping. Easy to disassemble and replace for maintenance.

In the aforementioned composite automobile front shock absorber assembly, the top end of the cylinder is sealed by a top cover, the top cover has a central hole, and one end of the piston rod extends out of the cylinder through the central hole. Together with the base, the cylinder barrel forms a closed space to prevent oil and gas leakage.

In the aforementioned composite automobile front shock absorber assembly, an annular sealing block is provided inside the top of the cylinder, the outer peripheral surface of the sealing block abuts against the inner wall of the cylinder, and the inner peripheral surface abuts against the outer wall of the piston rod. Since the piston rod is in up and down reciprocating motion, the sealing block can play the role of active sealing.

In the above-mentioned compound automobile front shock absorber assembly, the outer wall of the part where the piston rod is inserted into the cylinder is fixedly sleeved with a limiting block that limits the moving stroke of the piston rod. The limit block limits the limit position of the upward movement of the piston and provides a stroke range for the movement of the piston.

In the aforementioned composite automobile front shock absorber assembly, the top cover and the base are both fixed on the cylinder barrel by welding. The welding process is simple and the connection strength is high.

In the aforementioned composite automobile front shock absorber assembly, a spring support and a steering knuckle mounting seat are fixed on the outer wall of the cylinder. The spring support is used to install the shock-absorbing spring, and is fixedly connected to the cylinder barrel together with the steering knuckle mounting seat by welding.

Compared with the prior art, the composite automobile front shock absorber assembly has the following advantages:

1. Since there is a compression valve 1 in the cylinder below the piston, all the oil in the cylinder can flow, thereby improving the damping performance, and at the same time, the flowing oil can improve the anti-distortion ability of the shock absorber.

2. Since the base is equipped with a floating piston, it can adjust the pressure inside the shock absorber, improve the damping characteristics, and improve the anti-distortion ability.

3. Since the piston rod is hollow to form an oil storage chamber, there is no need to increase the oil storage chamber through the traditional double-cylinder structure to store oil, so the piston contacts the wall of the cylinder to directly dissipate heat and reduce the temperature of the oil.

Description of drawings

Fig. 1 is the structural cross-sectional view of this composite automobile front shock absorber assembly.

Figure 2 is an enlarged view of the structure at A in Figure 1.

Figure 3 is an enlarged view of the structure at B in Figure 1.

Figure 4 is an enlarged view of the structure at point C in Figure 1.

In the figure, 1. Cylinder; 2. Piston rod; 21. Oil storage chamber; 22. Compression valve two; 23. Limiting block; 3. Piston; 31. Valve body; 4. Compression valve one; 5. Floating piston ; 51, sealing ring; 6, sealing block; 7, top cover; 8, base; 9, spring support; 10, steering knuckle mounting seat.

Detailed ways

The following are specific embodiments of the utility model and in conjunction with the accompanying drawings, the technical solution of the utility model is further described, but the utility model is not limited to these embodiments.

As shown in Figure 1 and Figure 2, a composite automobile front shock absorber assembly includes a cylinder 1 and a piston rod 2, the cylinder 1 is filled with oil, and one end of the piston rod 2 is fixed with a piston 3, The piston 3 is inserted into the cylinder 1 from the top of the cylinder 1, and the piston 3 is provided with a valve body 31, which allows oil to pass through and can increase the resistance of the oil to pass through; the piston rod 2 is a hollow structure with an open end. An oil storage cavity 21 is formed, and a second compression valve 22 is fixedly connected to the open end, and the second compression valve 22 allows oil to pass through and can increase the resistance of the oil to pass through. A compression valve-4 is fixedly connected in the cylinder barrel 1 below the piston, and the compression valve-4 also allows the oil to pass through and can increase the resistance of the oil to pass through. When the piston 3 moves downward, under the pressure of the piston 3, part of the oil flows to the top of the cylinder barrel 1 through the valve body 31, part of it flows into the oil storage chamber 21 of the piston rod 2 through the compression valve 22, and part of it flows through the compression valve -4 flows to the bottom of the compression valve -4. This structure enables all the oil in the cylinder 1 to flow, thereby improving the damping performance. At the same time, the flowing oil can improve the anti-distortion ability of the shock absorber.

Specifically, as shown in Fig. 3 and Fig. 4, the top of the cylinder 1 is sealed by a top cover 7, the top cover 7 has a central hole, and one end of the piston rod 2 extends out of the cylinder 1 through the central hole, and the cylinder 1 The bottom end of 1 is sealed by a cylindrical base 8, and the top cover 7 and base 8 are fixed on the cylinder 1 by welding. A floating piston 5 is arranged in the base 8, and a sealing ring 51 is arranged between the outer peripheral surface of the floating piston 5 and the inner wall of the base 8. The floating piston 5 and the base 8 form a closed cavity, and the cavity is filled with nitrogen. When the piston 3 moves downward, part of the oil passes through the compression valve 4 and impacts the floating piston 5, and the floating piston 5 compresses the nitrogen gas to move downward, providing space for the oil passing through the compression valve 4, which can adjust the pressure inside the shock absorber , improve the damping characteristics and improve the anti-distortion ability.

The first compression valve 4 is fixedly connected in the cylinder barrel 1 by snapping, and the second compression valve 22 is also fixedly connected on the piston rod 2 by snapping, so as to facilitate disassembly, replacement and maintenance. An annular sealing block 6 is arranged inside the top of the cylinder 1, the outer peripheral surface of the sealing block 6 abuts against the inner wall of the cylinder 1, and the inner peripheral surface abuts against the outer wall of the piston rod 2 to prevent leakage of oil and gas. The outer wall of the part where the piston rod 2 is inserted into the cylinder 1 is fixedly provided with a limit block 23 , which limits the limit position of the upward movement of the piston 3 and provides a stroke range for the movement of the piston 3 . A spring support 9 and a steering knuckle mount 10 are welded and fixed on the outer wall of the cylinder 1 .

The specific embodiments described herein are only examples to illustrate the spirit of the present invention. Those skilled in the technical field to which the utility model belongs can make various modifications or supplements to the described specific embodiments or adopt similar methods to replace them, but they will not deviate from the spirit of the utility model or go beyond the appended claims defined range.

Although this article uses more cylinder barrel 1, piston rod 2, oil storage chamber 21, compression valve 22, limit block 23, piston 3, valve body 31, compression valve 1, floating piston 5; sealing ring 51 , sealing block 6, top cover 7, base 8, spring support 9, steering knuckle mount 10 and other terms, but the possibility of using other terms is not excluded. These terms are only used to describe and explain the essence of the utility model more conveniently; interpreting them as any kind of additional limitation is contrary to the spirit of the utility model.

Claims (9)

1. a compound vehicle bracket of shock absorber, comprise that one is filled with the cylinder barrel (1) of fluid and the piston rod (2) that an end is fixed with piston (3), above-mentioned piston (3) inserts in cylinder barrel (1) from cylinder barrel (1) top, described piston rod (2) has the shoe cream room (21) that allows the fluid turnover, described piston (3) is provided with and allows fluid pass through and increase fluid by the valve body (31) of resistance, it is characterized in that, be fixed with a permission fluid in the cylinder barrel (1) of described piston (3) below and pass through and increase fluid by the compression valve one (4) of resistance.

2. compound vehicle bracket of shock absorber according to claim 1, it is characterized in that, the bottom of described cylinder barrel (1) is by base cylindraceous (a 8) sealing, be provided with a floating piston (5) in base (8), between the outer circumferential face of this floating piston (5) and base (8) inwall, be provided with seal ring (51).

3. compound vehicle bracket of shock absorber according to claim 2, it is characterized in that, described shoe cream room (21) is the opening-like hollow structure of piston rod (2) insertion end, at the opening end of shoe cream room (21), is fixed with and allows fluid turnover shoe cream room (21) and increase fluid by the compression valve two (22) of resistance.

4. compound vehicle bracket of shock absorber according to claim 3, is characterized in that, described compression valve one (4) and compression valve two (22) all are connected in respectively on cylinder barrel (1) and piston rod (2) by the mode of clamping.

5. compound vehicle bracket of shock absorber according to claim 4, it is characterized in that, the top of described cylinder barrel (1) is by a top cover (7) sealing, and this top cover (7) has a center hole, and above-mentioned piston rod (2) one ends stretch out cylinder barrel (1) through center hole.

6. compound vehicle bracket of shock absorber according to claim 5, it is characterized in that, described cylinder barrel (1) inside, top is provided with ring packing piece (6), the outer circumferential face of sealing piece (6) and cylinder barrel (1) inwall against, inner peripheral surface and piston rod (2) outer wall against.

7. according to the described compound vehicle bracket of shock absorber of claim 5 or 6, it is characterized in that, on the outer wall of described piston rod (2) insertion cylinder barrel (1) part, fixed cover is provided with the limiting stopper (23) of limited piston bar (a 2) shift motion.

8. compound vehicle bracket of shock absorber according to claim 7, is characterized in that, described top cover (7) all is fixed on cylinder barrel (1) by welding manner with base (8).

9. compound vehicle bracket of shock absorber according to claim 1, is characterized in that, is fixed with spring support (9) and knuckle fitting seat (10) on described cylinder barrel (1) outer wall.

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