Automobile air spring assembly

Abstract

The utility model discloses an automobile air spring assembly, relates to the technical field of air springs, solves the problems that an existing device is low in damping and buffering performance and poor in using effect, and adopts the following scheme that a piston rod extending into a shell is fixedly installed on the bottom face of a pressing plate. Through the arrangement of a damping valve piston, a constant proportion overflow valve and a telescopic spring, when a pressing plate bears pressure, a piston rod moves downwards, the telescopic spring is compressed, and the instantaneous pressure borne by the damping valve piston is larger than the set pressure of the constant proportion overflow valve, the constant proportion overflow valve can be automatically opened, and therefore the pressure and the downward moving speed of the constant proportion overflow valve are reduced; the air spring is simple in structure and high in damping and buffering performance, meanwhile, through the arrangement of a buffering cylinder and a piston plate, an isolation piston compresses air in an air cavity, the air enters the buffering cylinder through a communicating pipe, and therefore the piston plate is driven to move upwards, the air in the buffering cylinder is compressed, the stretching and retracting speed of the air spring is reduced, and the using effect of the air spring is improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to air spring technical field, concretely is automobile air spring assembly. BACKGROUND

[0002] Air spring gradually popularizes in the application in automobile suspension system, air spring is installed between the vehicle body and suspension, has the height of car body adjustable, obvious nonlinear rigidity and so on advantage, improves the controllability and comfort of car.

[0003] Through the search, the application of patent announcement No. CN115723501B discloses an air spring assembly and a car, which comprises an air spring, an air chamber and an isolation valve, the isolation valve is arranged between the air bag and the rigid air chamber of the air spring, the isolation valve is used for controlling the on-off of the air bag and the air chamber, the isolation valve comprises a valve body provided with a valve port and a valve plate used for opening and closing the valve port, when the valve port is opened, the valve port is communicated with the air bag and the air chamber, when the valve port is closed, the isolation valve separates the air bag and the air chamber, so that the rigidity of the air spring can be adjusted, and the use effect is improved.

[0004] However, when the air spring is subjected to a large pressure in an instant, the air spring will be compressed by a certain amount in an instant, and the elongation rate of the air spring is also fast, so that the car is prone to up and down fluctuation, and the displacement of fluctuation is large, the shock absorption and buffering performance is low, and at the same time, since the device has only one air chamber, the air compression stroke is short, the air spring has a fast extension and retraction rate, the use effect is poor, and the comfort of the car is low.

[0005] Therefore, we propose an automobile air spring assembly. INVENTION CONTENTS

[0006] In view of the defects of the prior art, the utility model provides an automobile air spring assembly, which solves the problems of low shock absorption and buffering performance and poor use effect of the prior art.

[0007] In order to achieve the above purpose, the utility model realizes the following technical scheme: an automobile air spring assembly, comprising an outer shell, a position-opposed pressing plate is assembled on the upper portion of the outer shell;

[0008] A piston rod extending into the outer shell is fixedly installed on the bottom surface of the pressing plate, the piston rod is in sliding connection with the outer shell, a size-adapted damping valve piston and an isolation piston are in sliding connection on the inner wall of the outer shell, the damping valve piston and the isolation piston divide the space inside the outer shell into an oil storage cavity, a working cavity and an air cavity from top to bottom, a position-opposed fixing frame is fixedly installed on the outer wall of the outer shell, a size-adapted extension spring is assembled between the fixing frame and the pressing plate, two groups of size-adapted fixed-ratio overflow valves are assembled on the damping valve piston;

[0009] The left side of the shell is equipped with a buffer cylinder, the bottom surface of the buffer cylinder is fixedly installed with a communicating pipe in communication with the air cavity, and the inner wall of the buffer cylinder is slidably connected with a piston plate with a matched specification.

[0010] Preferably, the top surface of the shell is fixedly installed with a damper with a matched specification of the piston rod, so that the shock absorption and buffering performance of the extension spring can be improved.

[0011] Preferably, the outer wall of the shell is fixedly installed with position-opposed heat dissipation fins, so that the heat dissipation performance of the shell can be improved, and the temperature of the internal oil can be prevented from being too high.

[0012] Preferably, the outer wall of the shell is fixedly installed with a fixed sleeve with a matched specification, the outer wall of the buffer cylinder is fixedly installed with a mounting plate with a matched specification, the top surface of the mounting plate is provided with four groups of position-opposed mounting holes A, and the top surface of the fixed sleeve is provided with a mounting hole B, so that the buffer cylinder can be limited and fixed, the stability of the buffer cylinder can be improved, and the buffer cylinder can be conveniently installed and dismounted.

[0013] Preferably, the bottom surface of the shell is fixedly installed with four groups of position-opposed connecting rods, and the bottom end of the connecting rod is fixedly installed with a bottom plate, so that the device can be conveniently connected with other objects.

[0014] Preferably, a sealing sleeve is arranged between the piston rod and the shell, so that the sealing performance between the shell and the piston rod can be improved, and the oil can be prevented from leaking out.

[0015] 1、The automobile air spring assembly, through the setting of the damping valve piston, the fixed-ratio overflow valve and the extension spring, when the pressing plate is subjected to pressure, the piston rod moves downward, the extension spring is compressed, the damping valve piston and the isolation piston move downward, so that the air is compressed, when the pressure instantaneously borne by the damping valve piston is greater than the pressure set by the fixed-ratio overflow valve, the fixed-ratio overflow valve is automatically opened, so that the pressure and the downward movement speed are reduced, and the shock absorption and buffering performance is high.

[0016] 2、Meanwhile, through the setting of the buffer cylinder and the piston plate, the isolation piston compresses the gas in the air cavity, the gas enters the buffer cylinder through the communicating pipe, so that the piston plate is driven to move upward, the gas in the buffer cylinder is compressed, the air compression stroke is improved, the air spring extension and retraction speed is slowed down, and the use effect is improved. BRIEF DESCRIPTION OF DRAWINGS

[0017] Figure 1 It is a structural schematic view of the whole utility model;

[0018] Figure 2 It is a structural schematic view of the damper of the utility model;

[0019] Figure 3This is a schematic diagram of the structure of the isolation piston of this utility model;

[0020] Figure 4 This is a schematic diagram of the structure of the buffer cylinder of this utility model.

[0021] In the diagram: 1. Outer shell; 2. Pressure plate; 3. Piston rod; 4. Damping valve piston; 5. Isolation piston; 6. Oil reservoir; 7. Working chamber; 8. Air chamber; 9. Fixing frame; 10. Telescopic spring; 11. Buffer cylinder; 12. Connecting pipe; 13. Piston plate; 14. Ratio relief valve; 15. Damper; 16. Heat dissipation fins; 17. Fixing sleeve; 18. Mounting plate; 19. Mounting hole A; 20. Mounting hole B; 21. Connecting rod; 22. Base plate. Detailed Implementation

[0022] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0023] Example 1: As Figures 1-4 As shown: A piston rod 3 extending into the housing 1 is fixedly installed on the bottom surface of the pressure plate 2. The piston rod 3 is slidably connected to the housing 1. A damping valve piston 4 and an isolation piston 5 of the same specifications are slidably connected on the inner wall of the housing 1. The damping valve piston 4 and the isolation piston 5 divide the internal space of the housing 1 into an oil storage chamber 6, a working chamber 7 and an air chamber 8 from top to bottom. A fixed bracket 9 with opposite positions is fixedly installed on the outer wall of the housing 1. A telescopic spring 10 of the same specifications is assembled between the fixed bracket 9 and the pressure plate 2. The damping valve piston 4 is equipped with... Equipped with two sets of proportional relief valves 14 with matching specifications, the damping valve piston 4, the proportional relief valve 14 and the telescopic spring 10 are arranged so that when the pressure plate 2 is under pressure, the piston rod 3 moves downward, the telescopic spring 10 is compressed, and the damping valve piston 4 and the isolation piston 5 move downward, thereby compressing the air. When the pressure instantaneously received by the damping valve piston 4 is greater than the pressure set by the proportional relief valve 14, the proportional relief valve 14 will automatically open, thereby reducing its pressure and the rate of downward movement, resulting in high shock absorption and buffering performance.

[0024] Example 2: As Figures 2-4As shown: A buffer cylinder 11 is assembled on the left side of the outer casing 1. A connecting pipe 12 connected to the air cavity 8 is fixedly installed on the bottom surface of the buffer cylinder 11. A piston plate 13 of the same specification is slidably connected to the inner wall of the buffer cylinder 11. Through the arrangement of the buffer cylinder 11 and the piston plate 13, the isolation piston 5 compresses the gas in the air cavity 8. The gas enters the buffer cylinder 11 through the connecting pipe 12, thereby driving the piston plate 13 to move upward, compressing the gas in the buffer cylinder 11, increasing the gas compression stroke, thereby slowing down the extension and contraction rate of the air spring and improving its performance.

[0025] Example 3: As Figures 2-3 As shown: Heat dissipation fins 16 are fixedly installed on the outer wall of the outer casing 1, which can improve the heat dissipation performance of the outer casing 1 and prevent the internal oil temperature from getting too high.

[0026] The working principle and usage process of this utility model are as follows: When the device needs to work, when the pressure plate 2 is under pressure, the piston rod 3 moves downward, the telescopic spring 10 is compressed, and the damping valve piston 4 and the isolation piston 5 move downward, thereby compressing the air. When the instantaneous pressure on the damping valve piston 4 is greater than the pressure set by the proportional overflow valve 14, the proportional overflow valve 14 will automatically open, thereby reducing its pressure and downward movement rate, resulting in high shock absorption and buffering performance. At the same time, the isolation piston 5 compresses the gas in the air chamber 8, and the gas enters the buffer cylinder 11 through the connecting pipe 12, thereby driving the piston plate 13 to move upward, compressing the gas in the buffer cylinder 11, increasing the gas compression stroke, thereby slowing down the extension and contraction rate of the air spring and improving its performance.

[0027] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. It will be apparent to those skilled in the art that this utility model is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or basic characteristics of this utility model. Therefore, the embodiments should be considered exemplary and non-limiting in all respects. The scope of this utility model is defined by the appended claims rather than the foregoing description, and thus all variations falling within the meaning and scope of equivalents of the claims are intended to be included within this utility model. No reference numerals in the claims should be construed as limiting the scope of the claims.

[0028] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. An automotive air spring assembly, including a housing (1) on which a pressure plate (2) is mounted in opposite positions. Its features are: A piston rod (3) extending into the outer shell (1) is fixedly installed on the bottom surface of the pressure plate (2). The piston rod (3) is slidably connected to the outer shell (1). A damping valve piston (4) and an isolation piston (5) of the same specification are slidably connected on the inner wall of the outer shell (1). The damping valve piston (4) and the isolation piston (5) divide the space inside the outer shell (1) from top to bottom into an oil storage chamber (6), a working chamber (7) and an air chamber (8). A fixed bracket (9) with opposite positions is fixedly installed on the outer wall of the outer shell (1). A telescopic spring (10) of the same specification is assembled between the fixed bracket (9) and the pressure plate (2). Two sets of fixed ratio relief valves (14) of the same specification are assembled on the damping valve piston (4). A buffer cylinder (11) is assembled on the left side of the outer shell (1). A connecting pipe (12) connected to the air cavity (8) is fixedly installed on the bottom surface of the buffer cylinder (11). A piston plate (13) of the same specification is slidably connected to the inner wall of the buffer cylinder (11).

2. The automotive air spring assembly according to claim 1, characterized in that: A damper (15) that is compatible with the specifications of the piston rod (3) is fixedly installed on the top surface of the outer shell (1).

3. The automotive air spring assembly according to claim 1, characterized in that: Heat dissipation fins (16) are fixedly installed on the outer wall of the outer shell (1) in opposite positions.

4. The automotive air spring assembly according to claim 1, characterized in that: A fixed sleeve (17) of the same specification is fixedly installed on the outer wall of the outer shell (1), and a mounting plate (18) of the same specification is fixedly installed on the outer wall of the buffer cylinder (11). The top surface of the mounting plate (18) is provided with four sets of mounting holes A (19) in opposite positions, and the top surface of the fixed sleeve (17) is provided with mounting holes B (20).

5. The automotive air spring assembly according to claim 1, characterized in that: Four sets of connecting rods (21) with opposite positions are fixedly installed on the bottom surface of the outer shell (1), and a base plate (22) is fixedly installed at the bottom end of the connecting rods (21).

6. The automotive air spring assembly according to claim 1, characterized in that: A sealing sleeve is fitted between the piston rod (3) and the outer casing (1).

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