Automobile suspension system and shock absorber thereof

Abstract

The present invention relates to an automobile suspension system and a shock absorber thereof in the field of shock absorption technology, including a gas buffer component and a solid buffer component; the gas buffer component includes a cylinder body, a piston and a piston rod, the cylinder body has an annular inner cavity structure, a gas port is provided on the side of the cylinder body, the piston piston is adapted and connected in the annular inner cavity of the cylinder body, and the piston rod is connected to the lower end of the piston; the solid buffer component includes a connecting seat, a solid buffer block and a punch, the solid buffer block is connected in the middle cavity of the cylinder body through the connecting seat, the punch is located in the middle cavity of the cylinder body and moves synchronously with the piston rod; after the piston rod receives external pressure to drive the piston to move to a predetermined distance, the punch contacts the solid buffer block, and during the process of the piston continuing to move upward to compress the gas, the solid buffer block is compressed to cooperate in buffering and shock absorption. The present application solves the problems of complex structure and oil leakage caused by the main use of a gas-liquid buffer composite structure due to the difficulty in setting a solid buffer core in a single-cavity cylinder body, and improves the shock absorption effect.

Description

Technical Field

[0001] The present invention relates to the technical field of shock absorption, and in particular to an automobile suspension system and a shock absorber thereof. Background Art

[0002] Suspension shock absorbers are installed in parallel with elastic elements in the suspension system to improve the ride comfort of the car. Shock absorbers are used to suppress the shock caused by the rebound of the spring after absorbing the shock, the impact from the road surface, and the torsional vibration of the crankshaft. Achieving a good shock absorption effect is an important research topic in the field of shock absorbers in the automotive industry.

[0003] In the prior art, hydraulic shock absorbers are mostly used. The working principle is that when the frame (or body) and the axle are vibrated and move relative to each other, the piston in the shock absorber moves up and down, and the oil in the shock absorber cavity repeatedly flows from one cavity to another through different pores. However, oil leakage is a major problem that hydraulic shock absorbers need to solve. People in this field have tried to use a combination of gas and liquid to achieve shock absorption. For example, the publication number CN102359529A discloses a piston-type liquid-gas buffer, and its technical solution is as follows: it includes a cylinder body, a hollow piston rod, and a piston fixedly connected to the piston rod. A first oil chamber is formed between the bottom of the piston and the cylinder body, an airbag is installed in the piston rod, and an airtight device is provided outside the plug of the airbag. A second oil chamber is formed between the bottom of the airbag and the inner end face of the hollow piston rod, and a first throttling channel is provided between the first oil chamber and the second oil chamber; a cavity is formed between the outer circle of the piston rod, the outer end face of the piston, and the cylinder body, and a polyurethane limit block is provided in the cavity, and a guide seat is provided at the outer end of the polyurethane limit block, which divides the above-mentioned cavity into a third oil chamber and a fourth oil chamber. A second throttling channel is provided between the third oil chamber and the second oil chamber; the first oil chamber, the second oil chamber, and the third oil chamber are filled with low-viscosity oil, and the fourth oil chamber is filled with high-viscosity oil, and the airbag is filled with gas. This technical solution aims to solve the oil leakage problem by converting high-pressure oil into low pressure through means such as built-in airbags. However, on the one hand, built-in airbags are difficult to implement in actual operation, and on the other hand, it is difficult to fundamentally solve the oil leakage problem. Summary of the invention

[0004] In view of the defects in the prior art, an object of the present invention is to provide an automobile suspension system and a shock absorber thereof.

[0005] According to the present invention, a vehicle suspension shock absorber includes a gas buffer component and a solid buffer component;

[0006] The gas buffer assembly includes a cylinder body, a piston and a piston rod. The cylinder body has an annular inner cavity structure. A gas port is provided on the side of the cylinder body. The piston is adapted to be connected in the annular inner cavity of the cylinder body. The piston rod is connected to the lower end of the piston.

[0007] The solid buffer assembly comprises a connecting seat, a solid buffer block and a punch, wherein the solid buffer block is connected to the middle cavity of the cylinder body through the connecting seat, and the punch is located in the middle cavity of the cylinder body and moves synchronously with the piston rod;

[0008] After the piston rod receives external pressure to drive the piston to move to a predetermined distance, the punch contacts the solid buffer block. During the process of the piston continuing to move upward to compress the gas, the solid buffer block is compressed to cooperate in buffering and shock absorption.

[0009] In some embodiments, when the compression stroke of the piston reaches one third of the maximum compression stroke, the solid buffer block contacts the punch and is compressed.

[0010] In some embodiments, the cylinder body includes an outer ring plate, an inner ring plate and an annular bottom plate, the outer ring plate and the inner ring plate are connected to the annular bottom plate, the air port is located on the outer ring plate, and the connecting seat is connected to the inner ring plate.

[0011] In some implementations, a buffer pad is disposed on the annular bottom plate, and the material of the buffer pad is polyurethane.

[0012] In some embodiments, there are multiple piston rods, and the multiple piston rods are evenly distributed along the circumference of the piston.

[0013] In some embodiments, the punch is a T-shaped body, the upper end of the punch is used to contact the solid buffer block, and the lower end of the punch and the lower end of the piston rod are both connected to the bearing plate.

[0014] In some implementations, the solid buffer block is made of polyurethane, has a gourd-shaped structure, and is connected to the connection seat in an inverted manner.

[0015] In some implementations, the air port is connected to a pressure sensor, and the pressure sensor is used to obtain the air pressure value in the cylinder.

[0016] In some implementations, there are multiple air ports, and the multiple air ports are arranged at equal intervals along the circumference of the cylinder body.

[0017] The invention also provides an automobile suspension system, which adopts the automobile suspension shock absorber.

[0018] Compared with the prior art, the present invention has the following beneficial effects:

[0019] 1. The automobile suspension shock absorber of the present application transforms the single-chamber cylinder body into a double-chamber cylinder body with an annular structure. The annular piston is adapted to be arranged in the outer cavity of the cylinder body, and the solid buffer block is placed in the inner cavity of the cylinder body. The piston rod and the punch move synchronously to form an integrated structure of gas and solid composite buffering. The structural design is ingenious and novel, and solves the problems of complex structure and oil leakage caused by the main use of gas-liquid buffering composite structure due to the difficulty in setting a solid buffering core in the single-chamber cylinder body. At the same time, under the action of gas-solid composite buffering, the initial gas buffering is changed to gas-solid composite buffering, which makes the buffering effect more linear and significantly improves the shock absorption effect.

[0020] 2. In the present application, a plurality of piston rods are evenly distributed on the annular piston, and the plurality of piston rods and the punch located in the middle are connected to the load-bearing plate. During the buffering process of the external vibration force, the force transmission is changed from a single point to multiple points of contact, which can effectively improve the buffering performance and enhance the shock absorption effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Other features, objects and advantages of the present invention will become more apparent from the detailed description of non-limiting embodiments made with reference to the following drawings:

[0022] Figure 1 The figure is a schematic diagram of the overall structure of the automobile suspension shock absorber of the present invention. DETAILED DESCRIPTION

[0023] The present invention is described in detail below in conjunction with specific embodiments. The following embodiments will help those skilled in the art to further understand the present invention, but are not intended to limit the present invention in any form. It should be noted that, for those of ordinary skill in the art, several changes and improvements can also be made without departing from the concept of the present invention. These all belong to the protection scope of the present invention.

[0024] This embodiment provides a vehicle suspension shock absorber, such as Figure 1 As shown, a shock absorber with gas-solid composite buffering function is mainly formed by a gas buffer component 100 and a solid buffer component 200 through ingenious structural design.

[0025] The gas buffer assembly 100 is mainly composed of a cylinder body 110, a piston 120 and a piston rod 130. The cylinder body 110 is an annular structure with an annular inner cavity structure, mainly including an outer ring plate 112, an inner ring plate 113 and an annular bottom plate 114. The outer ring plate 112 is sleeved outside the inner ring plate 113 to form an annular inner cavity structure, and the inner cavity of the inner ring plate 113 is used to carry and accommodate the solid buffer assembly 200. The annular bottom plate 114 is sealed and connected to the upper ends of the outer ring plate 112 and the inner ring plate 113, and the lower ends of the outer ring plate 112 and the inner ring plate 113 are connected through a cylinder head 116. The annular bottom plate 114 is used to connect with the automobile suspension. In some embodiments, a polyurethane pad 115 is provided on the annular bottom plate 114, and the polyurethane pad 115 is connected to the automobile suspension to further improve the shock absorption performance. The piston 120 is an annular structural block, adapted to be slidably connected in the annular inner cavity, the outer circumference of the piston 120 is slidably sealed with the inner circumference of the outer ring plate 112, and the inner circumference of the piston 120 is slidably sealed with the outer circumference of the inner ring plate 113. One end of the piston rod 130 is connected to the lower end surface of the piston 120, and the other end of the piston rod 130 extends outside the cylinder head of the cylinder body 110. There are multiple piston rods 130 connected to the lower end surface of the piston 120, and the multiple piston rods 130 are evenly spaced and arranged along the circumferential direction of the piston 120. The lower ends of the multiple piston rods 130 are commonly connected to the same bearing plate 300, and the bearing plate 300 is used to be connected to the automobile frame mechanism. The side of the cylinder body 110 is provided with an air port 111, and the air port 111 is located on the outer ring plate 112, and the external gas is passed into the annular inner cavity through the air port 111. In this embodiment, the gas port 111 is connected to a pressure sensor 400, and the pressure sensor 400 is used to detect and obtain the air pressure value in the annular inner cavity, and adjust the amount of gas introduced into the annular inner cavity according to the air pressure value, so as to adjust the shock absorption performance of the shock absorber. In some embodiments, multiple gas ports 111 are arranged along the circumference of the cylinder body 110, and the gas in the annular inner cavity is charged and discharged through the multiple gas ports 111, and the pressure sensor 400 connected through the multiple gas ports 111 can obtain the air pressure value more accurately to ensure the shock absorption effect.

[0026] The solid buffer assembly 200 is mainly composed of a connecting seat 210, a solid buffer block 220 and a punch 230. The connecting seat 210 is composed of two arc-shaped sockets, the arc of the two arc-shaped sockets is less than 180°, and the two arc-shaped sockets are provided with horizontal hook-shaped grooves for clamping the solid buffer block 220. The two arc-shaped sockets are connected to the inner wall surface of the inner ring plate 113 in a symmetrical manner. The solid buffer block 220 is a polyurethane buffer block formed of polyurethane material. In this embodiment, the polyurethane buffer block is a gourd-shaped knot with an axial center through hole, and a boss is formed at its bottom along the circumferential direction. The polyurethane buffer block is connected to the horizontal hook-shaped groove of the connecting seat 210 through the boss located at the bottom. The punch 230 is a T-shaped structure, which is located in the inner cavity of the inner ring plate 113. The lower end of the punch 230 extends to the outside of the cylinder body 110 and is connected to the load-bearing plate 300 , and moves up and down synchronously with the piston rod 120 . The upper end surface of the punch 230 is used to contact the lower end of the solid buffer block 220 and compress the solid buffer block.

[0027] The automobile suspension shock absorber provided in this embodiment has the following working principle: a predetermined amount of gas is injected into the annular inner cavity of the cylinder body 110 through the gas port 111, a corresponding pressure value is obtained through the pressure sensor 400, and the gas port 111 is closed when the predetermined pressure value is reached. When the bearing plate 300 receives pressure from the outside, it drives the piston rod 130 and the punch 230 to move synchronously. In the initial stage, the piston rod 130 pushes the piston 120 upward and compresses the gas in the annular inner cavity, and the compression of the gas realizes the buffering and shock absorption. When the compression stroke of the piston 120 reaches about one-third of the total stroke, the upper end surface of the upward punch 230 contacts the top of the solid buffer block 220. In the process that the bearing plate 300 continues to push the piston rod 130 and the punch 230 to move upward synchronously due to the external pressure, the solid buffer block 220 compressed by the punch 230 and the gas compressed by the piston 120 cooperate to realize the buffering and shock absorption effect until the compression amount of the solid buffer block 220 reaches the maximum. When the external force applied to the load-bearing plate 300 disappears, the load-bearing plate 300 performs a reset movement under the action of the compressed gas and the compressed solid buffer block 220. After the solid buffer block 220 is separated from the punch 230, the compressed gas resets the load-bearing plate 300 to its original position. The automobile suspension shock absorber of the present application changes the single-chamber cylinder body into a double-chamber structure cylinder body with an annular structure, the annular piston is adapted to be arranged in the outer cavity of the cylinder body, and the solid buffer block is placed in the inner cavity of the cylinder body, and an integrated structure of gas and solid composite buffer is formed through the synchronous movement of the piston rod and the punch. The structural design is ingenious and novel, which solves the problems of complex structure and oil leakage caused by the main use of gas-liquid buffer composite structure due to the difficulty in setting a solid buffer core in the single-chamber cylinder body. At the same time, under the action of gas-solid composite buffer, the initial gas buffer is changed to gas-solid composite buffer, so that the buffering effect tends to change more linearly, which significantly improves the shock absorption effect. In addition, in the present application, multiple piston rods are evenly distributed on the annular piston, and the multiple piston rods and the punch located in the middle are connected to the load-bearing plate. During the buffering process of the external vibration force, the force transmission is changed from a single point to multiple points of contact, which can effectively improve the buffering performance and enhance the shock absorption effect.

[0028] In the description of the present application, it should be understood that the terms "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present application.

[0029] The above describes the specific embodiments of the present invention. It should be understood that the present invention is not limited to the above specific embodiments, and those skilled in the art can make various changes or modifications within the scope of the claims, which does not affect the essence of the present invention. In the absence of conflict, the embodiments of the present application and the features in the embodiments can be combined with each other arbitrarily.

Claims

1. An automobile suspension shock absorber, characterized in that: It comprises a gas buffer component (100) and a solid buffer component (200); The gas buffer assembly (100) comprises a cylinder body (110), a piston (120) and a piston rod (130); the cylinder body (110) has an annular inner cavity structure; a gas port (111) is provided on the side of the cylinder body (110); the piston (120) is adapted to be connected in the annular inner cavity of the cylinder body (110); and the piston rod (130) is connected to the lower end of the piston (120); The solid buffer assembly (200) comprises a connecting seat (210), a solid buffer block (220) and a punch (230); the solid buffer block (220) is connected to the middle cavity of the cylinder body (110) through the connecting seat (210); the punch (230) is located in the middle cavity of the cylinder body (110) and moves synchronously with the piston rod (130); After the piston rod (130) receives external pressure to drive the piston (120) to move to a predetermined distance, the punch (230) contacts the solid buffer block (220). When the piston (120) continues to move upward to compress the gas, the solid buffer block (220) is compressed to cooperate in buffering and shock absorption.

2. The automobile suspension shock absorber according to claim 1, characterized in that: When the compression stroke of the piston (120) reaches one third of the maximum compression stroke, the solid buffer block (220) contacts the punch (230) and is compressed.

3. The automobile suspension shock absorber according to claim 1, characterized in that: The cylinder body (110) comprises an outer ring plate (112), an inner ring plate (113) and an annular bottom plate (114); the outer ring plate (112) and the inner ring plate (113) are connected to the annular bottom plate (114); the air port (111) is located on the outer ring plate (112); and the connecting seat (210) is connected to the inner ring plate (113).

4. The automobile suspension shock absorber according to claim 3, characterized in that: A buffer pad (115) is arranged on the annular bottom plate (114), and the material of the buffer pad (115) is polyurethane.

5. The automobile suspension shock absorber according to claim 1, characterized in that: There are multiple piston rods (130), and the multiple piston rods (130) are evenly arranged along the circumference of the piston (120).

6. The automobile suspension shock absorber according to claim 5, characterized in that: The punch (230) is a T-shaped body, the upper end of the punch (230) is used to contact the solid buffer block (220), and the lower end of the punch (230) and the lower end of the piston rod (130) are both connected to the bearing plate (300).

7. The automobile suspension shock absorber according to claim 1, characterized in that: The material of the solid buffer block (220) is polyurethane, the solid buffer block (220) is in a gourd-shaped structure, and the solid buffer block (220) is connected to the connection seat (210) in an upside-down manner.

8. The automobile suspension shock absorber according to claim 1, characterized in that: The air port (111) is connected to a pressure sensor (400), and the pressure sensor (400) is used to obtain the air pressure value in the cylinder (110).

9. The automobile suspension shock absorber according to claim 1, characterized in that: There are a plurality of air ports (111), and the plurality of air ports (111) are arranged at equal intervals along the circumference of the cylinder body (110).

10. An automobile suspension system, characterized in that: An automobile suspension shock absorber as described in any one of claims 1 to 9 is used.

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