Air spring shock absorber with adjustable rigidity and height

Abstract

The utility model discloses an air spring shock absorber with adjustable rigidity and height, which comprises a connecting fork arm, an oil storage cylinder connected with the end part of the connecting fork arm, a U-shaped seat arranged on the outer wall of the oil storage cylinder, an oil cylinder base arranged at the end part of the oil storage cylinder, a guider arranged on the inner side of the bottom of the oil storage cylinder, and a working cylinder arranged on the inner side of the oil storage cylinder, a piston rod is arranged on the inner side of the working cylinder in a sliding mode, the piston rod is in sliding fit with the working cylinder through a first piston, the piston rod penetrates through the guider and is in sliding fit with the guider, an end is arranged on the outer side of the lower portion of the piston rod, and a cushion pad is arranged at the lower end of the end and on the outer side of the piston rod. A second O-shaped ring is arranged between the cushion pad and the piston rod, a plane bearing is arranged on the outer side of the cushion pad, a mounting plate is arranged on the outer side of the plane bearing, and the functions that the damping effect is improved, the weight is light, and the elastic rigidity and the height are adjustable are achieved.

Description

Technical Field

[0001] This utility model relates to the field of shock absorber technology, specifically an air spring shock absorber with adjustable stiffness and height. Background Technology

[0002] Most domestically produced car shock absorbers are mechanical spring shock absorbers. When the impact force of the road on the car wheel is transmitted to the mechanical spring shock absorber, the mechanical spring deforms, absorbs the kinetic energy of the wheel, and converts it into the potential energy of the mechanical spring, thereby mitigating the impact of the ground on the car body. However, the mechanical spring itself does not consume energy. The spring that has stored potential energy will return to its original shape and convert the potential energy back into kinetic energy.

[0003] Mechanical spring shock absorbers have limited damping effect due to the limited effect of springs. Therefore, under high vibration conditions, their damping efficiency is relatively low and cannot meet the actual needs of some users. Due to the limitations of basic structure and raw materials, mechanical springs are relatively heavy. After installation, the weight of the shock absorber will increase, which will also cause inconvenience to some vehicles. The parameters of spring shock absorbers are set before leaving the factory. Their stiffness and damping elastic energy are fixed and cannot be adjusted according to actual road conditions, such as vehicle height and shock absorber stiffness, resulting in poor comfort.

[0004] Therefore, designing a shock absorber that improves damping performance, is lightweight, and has adjustable elasticity, stiffness, and height is the problem the inventors wanted to solve. Utility Model Content

[0005] To address the shortcomings of existing technologies, the purpose of this utility model is to provide an air spring shock absorber with adjustable stiffness and height, which can achieve improved shock absorption, lightweight design, and adjustable elastic stiffness and height.

[0006] The technical solution adopted by this utility model device is: an air spring shock absorber with adjustable stiffness and height, comprising a connecting fork arm, an oil reservoir connected to the end of the connecting fork arm, a U-shaped seat provided on the outer wall of the oil reservoir, an oil cylinder base provided at the end of the oil reservoir, a guide provided on the inner side of the bottom of the oil reservoir, a working cylinder provided on the inner side of the oil reservoir, the guide and the working cylinder being sealed together by a third O-ring, a piston rod slidably provided on the inner side of the working cylinder, the piston rod being slidably engaged with the working cylinder through a first piston, the piston rod passing through the guide and slidably engaged with the guide, an end provided on the lower outer side of the piston rod, a buffer pad provided at the lower end of the end and on the outer side of the piston rod, a second O-ring provided between the buffer pad and the piston rod, a plane bearing provided on the outer side of the buffer pad, and the plane bearing... A mounting plate is provided on the outer side of the bearing. The bottom of the piston rod is locked with a nylon lock nut. A reinforcing sleeve is provided on the inner side of the upper end of the end. A bladder is fixedly connected to the outer side of the end of the end by an end retainer. A second piston is fixedly connected to the upper end of the bladder by a piston retainer. A sealing seat is connected to the upper end of the second piston by a first O-ring. A spring disc is provided on the outer side of the sealing seat. A dust cover is fixedly provided on the outer side of the spring disc by a clamp. The lower end of the dust cover is located between the end retainer and the outer wall of the end. The end of the sealing seat is fixedly located on the lower outer wall of the oil reservoir. A gas protection valve is provided on the side wall of the end. A CDC control valve is provided on the upper side wall of the oil reservoir. An inner buffer rubber is provided on the lower outer side of the piston rod. The valve core base and the valve body shell are sealed by a fifth O-ring.

[0007] Furthermore, the CDC control valve includes a CDC valve, with a CDC cap mounted at its end. An oil port connector is provided at the blocking end of the CDC cap. A gasket is provided on the outer side of the oil port connector. The left end of the oil port connector is connected to the working cylinder via a fourth O-ring. A valve core is provided inside the CDC valve, and a valve core spring is provided inside the valve core. A flow regulating valve is mounted at the end of the valve core spring. A valve core base is provided at the end of the flow regulating valve. A movable valve core is mounted inside the valve core base. A magnetic shielding ring is provided on the outer side of the movable valve core. A coil is provided on the outer side of the magnetic shielding ring. The coil is connected to the valve body shell via a dustproof ring. The valve body shell is located on the outer wall of the oil reservoir.

[0008] Furthermore, a connecting bolt is provided on the inner side of the mounting plate, and a connecting nut is threaded onto the outer end of the connecting bolt.

[0009] Furthermore, the pad is snapped into the inner wall of the valve body housing.

[0010] Furthermore, the gas protection valve is connected to the vehicle's onboard air pump via a pipeline.

[0011] Furthermore, mounting holes are provided on the connecting fork arm.

[0012] Furthermore, the sidewall of the second piston has a conical structure, and the diameter of the end near the tip is larger than that of the other end.

[0013] Furthermore, an anti-collision cover is provided on the outer side of the lower end of the oil storage cylinder.

[0014] The beneficial effects of this utility model device are:

[0015] 1. This utility model reduces material weight by using an air spring, and at the same time, it works with an on-board air pump to adjust the gas pressure inside the air spring, thereby adjusting the stiffness of the air spring and further achieving the purpose of adjusting the vehicle height. This achieves the functions of improving shock absorption, lightweighting, and adjustable elasticity, stiffness, and height. Attached Figure Description

[0016] Figure 1 This is a structural view of the present invention.

[0017] Figure 2 This is a side view of the present invention.

[0018] Figure 3 This is a structural view of the CDC control valve of this utility model.

[0019] Explanation of reference numerals in the attached drawings: 1. Hydraulic cylinder base; 2. Oil reservoir; 3. Working cylinder; 4. Connecting fork arm; 5. Piston rod; 6. Sealing seat; 7. Spring disc; 8. First O-ring; 9. Second piston; 10. Dust cover; 11. Blade; 12. Inner buffer rubber; 13. Buffer pad; 14. Gas protection valve; 15. Connecting bolt; 16. Connecting nut; 17. Mounting plate; 18. Nylon lock nut; 19. Surface bearing; 20. Second O-ring; 21. End; 22. End retainer; 23. Addition... 24. Piston retainer ring; 25. Clamp; 26. Guide; 27. Third O-ring; 28. U-shaped seat; 29. ​​CDC control valve; 201. Fourth O-ring; 202. Oil port connector; 203. Gasket; 204. CDC gland; 205. CDC valve; 206. Valve core spring; 207. Movable valve core; 208. Coil; 209. Valve core; 210. Flow regulating valve; 211. Fifth O-ring; 212. Valve core base; 213. Magnetic shielding ring; 214. Dustproof ring. Detailed Implementation

[0020] The present invention will be further described below with reference to specific embodiments. These embodiments are for illustrative purposes only and are not intended to limit the scope of the invention. Furthermore, it should be understood that after reading the teachings of this invention, those skilled in the art can make various alterations or modifications to the invention, and these equivalent forms also fall within the scope defined by the appended claims.

[0021] Example 1: See Figures 1 to 3 This utility model includes a structural view, side view, and structural view of the CDC control valve 29. It describes an air spring shock absorber with adjustable stiffness and height, comprising a connecting fork arm 4, an oil reservoir 2 connected to the end of the connecting fork arm 4, a U-shaped seat 28 on the outer wall of the oil reservoir 2, an oil cylinder base 1 at the end of the oil reservoir 2, a guide 26 on the inner side of the bottom of the oil reservoir 2, a working cylinder 3 on the inner side of the oil reservoir 2, and a sealing fit between the guide 26 and the working cylinder 3 via a third O-ring 27. A piston rod 5 is slidably mounted on the inner side of the working cylinder 3, slidingly engaging with the working cylinder 3 via a first piston. The piston rod 5 passes through and slides with the guide 26. An end 21 is provided on the lower outer side of the piston rod 5, and a buffer pad 13 is provided at the lower end of the end 21 and on the outer side of the piston rod 5. A second O-ring 20 is provided between the buffer pad 13 and the piston rod 5. A plane bearing 19 is provided on the outer side of the buffer pad 13. An mounting plate 17 is provided on the outer side of the piston rod 5. The bottom of the piston rod 5 is locked by a nylon locking nut 18. A reinforcing sleeve 23 is provided on the inner side of the upper end of the end 21. A bladder 11 is fixedly connected to the outer side of the end of the end 21 by an end buckle 22. A second piston 9 is fixedly connected to the upper end of the bladder 11 by a piston buckle 24. A sealing seat 6 is connected to the upper end of the second piston 9 by a first O-ring 8. A spring disc 7 is provided on the outer side of the sealing seat 6. A dust cover 10 is fixedly provided on the outer side of the spring disc 7 by a clamp 25. The lower end of the dust cover 10 is located between the end buckle 22 and the outer wall of the end 21. The end of the sealing seat 6 is fixedly located on the lower outer wall of the oil reservoir 2. A gas protection valve 14 is provided on the side wall of the end 21. A CDC control valve 29 is provided on the upper side wall of the oil reservoir 2. An inner buffer rubber 12 is provided on the lower outer side of the piston rod 5. The valve core base 212 and the valve body shell are sealed by a fifth O-ring 211.

[0022] The CDC control valve 29 includes a CDC valve 205. A CDC cap 204 is mounted on the end of the CDC valve 205. An oil port connector 202 is provided to block the CDC cap 204. A gasket 203 is provided on the outside of the oil port connector 202. The left end of the oil port connector 202 is connected to the working cylinder 3 through a fourth O-ring 201. A valve core 209 is provided on the inside of the CDC valve 205. A valve core spring 206 is provided on the inside of the valve core 209. A regulating flow valve 210 is mounted on the end of the valve core spring 206. A valve core base 212 is provided on the end of the regulating flow valve 210. A movable valve core 207 is mounted on the inside of the valve core base 212. A magnetic shielding ring 213 is provided on the outside of the movable valve core 207. A coil 208 is provided on the outside of the magnetic shielding ring 213. The coil 208 is connected to the valve body shell through a dustproof ring 214. The valve body shell is located on the outer wall of the oil reservoir 2.

[0023] The mounting plate 17 has a connecting bolt 15 on its inner side, and a connecting nut 16 is threaded to the outer end of the connecting bolt 15. The pad 203 is snapped into the inner wall of the valve body shell. The gas protection valve 14 is connected to the vehicle's on-board air pump through a pipeline. The connecting fork arm 4 has a mounting hole. The side wall of the second piston 9 has a conical structure, and the diameter of the end near the end 21 is larger than that of the other end.

[0024] An anti-collision cover is provided on the outer side of the lower end of the oil reservoir 2.

[0025] Shock absorbers are one of the important components of a vehicle's suspension system. They are primarily used to suppress the oscillations caused by the rebound of the springs after absorbing shocks, as well as impacts from the road surface. They quickly absorb vibrations generated during bumps, allowing the vehicle to return to normal driving conditions. Coil spring shock absorbers are the most commonly used shock absorbers in modern Chinese cars. They have strong shock absorption capabilities and good ride comfort. However, their disadvantages include their large length, space requirements, and large contact surface at the installation location, making it difficult to achieve a compact suspension system layout. For ride comfort, it is desirable for the springs to be softer for high-frequency, low-amplitude ground impacts, while exhibiting greater rigidity to reduce impact travel when the impact force is large. Therefore, mechanical springs and damping shock absorbers are installed in parallel to achieve a more effective shock absorption effect. The safety function of damping shock absorbers mainly involves suppressing wheel vibrations and reducing wheel dynamic loads, thereby ensuring the safety of occupants and the vehicle while allowing the vehicle to fully utilize its power performance.

[0026] The external shape and structural schematic diagram of the technical solution of this invention are shown below. Figure 1 and Figure 2The shock absorber consists of an air spring, a twin-tube shock absorber body, and a mounting base. The shock absorber body comprises an oil reservoir 2, a piston rod 5, a piston rod working cylinder 3, a guide 26, a sealing seat 6, and a CDC control valve 29. The air spring consists of an air reservoir end 21, a rubber bladder 11, a piston 9, a clamping iron ring 24, a dust cover 10, and a buffer rubber seat 12. The mounting base consists of a frame mounting plate 17, connecting bolts 15, a thrust bearing 19, and internal buffer rubber on the mounting plate.

[0027] During normal vehicle operation, when the frame and axle reciprocate, the compression and recovery of the inner bladder 11 of the air spring shock absorber ensures that the shock absorber stiffness changes with the load and the natural frequency remains stable, thus ensuring the overall stability of the vehicle and the comfort of the ride.

[0028] When the car is driving on a normal road, adjusting the vehicle control panel to switch to comfort mode will cause the onboard air pump to inflate the air spring bladder 11 through the air pipe and shock absorber protection valve 14. As the air pressure increases, the stiffness of the air spring increases, and the vehicle height will be relatively high, greatly improving the vehicle's passability. When the vehicle is driving at high speed, adjusting the vehicle control panel to switch to sport mode will cause the air pump to bleed air from the air spring bladder, lowering the vehicle body. This reduces friction resistance at high speeds, lowers fuel consumption, and improves driving comfort. At the same time, the added shock absorber protection valve has a certain internal gas pressure protection function. When the overall vehicle suspension system leaks air, the shock absorber protection valve 14 can maintain a certain amount of internal pressure in the shock absorber to prevent the vehicle from stalling.

[0029] When the car is driving on a smooth road, during the compression stroke of the shock absorber, the piston rod 5 contracts downwards, and the bladder 11 undergoes compression deformation. The oil in the lower chamber of the working cylinder 3 mainly flows to the reservoir 2 through the damping oil hole. Simultaneously, a small amount of oil is diverted into the reservoir 2 through the compression valve at the bottom of the working cylinder 3 and the flow valve at the bottom of the piston rod. During the recovery stroke of the shock absorber, as the bladder 11 recovers its deformation, the piston rod 5 moves upwards. The oil in the upper chamber of the working cylinder 3 mainly flows into the recovery reservoir 2 through the oil hole of the working cylinder 3. A small amount of oil is diverted into the reservoir 2 through the compensation valve at the bottom of the working cylinder 3 and the recovery valve at the bottom of the piston rod, thus effectively completing the shock absorber's recovery stroke. When the car is driving on a bumpy road...

[0030] The vehicle height sensor detects the vehicle's driving status, and the vehicle ECU calculates the optimal damping force. It controls the coil 208 in the CDC regulating valve 29 to provide current stimulation. The moving valve core 207 slides to the left under the action of magnetic force, causing the CDC regulating valve 29 to open. Under pressure, the oil flows back and forth between the working cylinder 3 and the oil reservoir 2 through the throttle valve seat 210, thereby reducing the damping force of the oil on the shock absorber during the recovery compression process. At this time, the shock absorber becomes significantly softer.

[0031] When the car turns, the mounting plate 17 is fixed to the frame, the shock absorber body rotates with the tire, and the flat bearing 19 in the mounting seat rotates with the shock absorber, making the steering light and flexible and greatly improving driving comfort.

[0032] This invention reduces material weight by using an air spring, and simultaneously adjusts the air pressure inside the bladder 11 using an onboard air pump, thereby adjusting the stiffness of the air spring and further achieving the purpose of adjusting the vehicle height. This results in improved shock absorption, weight reduction, and adjustable elasticity, stiffness, and height.

Claims

1. An air spring shock absorber with adjustable stiffness and height, characterized in that: The system includes a connecting fork arm (4), with an oil reservoir (2) connected to the end of the connecting fork arm (4). A U-shaped seat (28) is provided on the outer wall of the oil reservoir (2), and an oil cylinder base (1) is provided at the end of the oil reservoir (2). A guide (26) is provided on the inner side of the bottom of the oil reservoir (2), and a working cylinder (3) is provided on the inner side of the oil reservoir (2). The guide (26) and the working cylinder (3) are sealed together by a third O-ring (27), and a piston rod (5) is slidably provided on the inner side of the working cylinder (3). The piston rod (5) slides with the working cylinder (3) through the first piston. The piston rod (5) passes through the guide (26) and slides with the guide (26). An end (21) is provided on the lower outer side of the piston rod (5). A buffer pad (13) is provided on the lower end of the end (21) and on the outer side of the piston rod (5). A second O-ring (20) is provided between the buffer pad (13) and the piston rod (5). A plane bearing (19) is provided on the outer side of the buffer pad (13). A plane bearing (19) is provided on the outer side of the plane bearing (19). A mounting plate (17) is provided. The bottom of the piston rod (5) is locked by a nylon locking nut (18). A reinforcing sleeve (23) is provided on the inner side of the upper end of the end (21). A bladder (11) is fixedly connected to the outer side of the end of the end (21) by an end buckle (22). A second piston (9) is fixedly connected to the upper end of the bladder (11) by a piston buckle (24). A sealing seat (6) is connected to the upper end of the second piston (9) by a first O-ring (8). A spring disc is provided on the outer side of the sealing seat (6). (7) A dust cover (10) is fixedly installed on the outer side of the spring disc (7) by a clamp (25). The lower end of the dust cover (10) is located between the end buckle (22) and the outer wall of the end (21). The end of the sealing seat (6) is fixedly installed on the lower outer wall of the oil reservoir (2). A gas protection valve (14) is installed on the side wall of the end (21). A CDC control valve (29) is installed on the upper side wall of the oil reservoir (2). An inner buffer rubber (12) is installed on the lower outer side of the piston rod (5).

2. The air spring shock absorber with adjustable stiffness and height according to claim 1, characterized in that: The CDC control valve (29) includes a CDC valve (205). A CDC cap (204) is fitted to the end of the CDC valve (205). An oil port connector (202) is provided to block the CDC cap (204). A gasket (203) is provided on the outside of the oil port connector (202). The left end of the oil port connector (202) is connected to the working cylinder (3) through a fourth O-ring (201). A valve core (209) is provided on the inside of the CDC valve (205). A valve core spring (206) is provided on the inside of the valve core (209). The end of the valve is equipped with a regulating flow valve (210), and the end of the regulating flow valve (210) is equipped with a valve core base (212). The inner side of the valve core base (212) is equipped with a movable valve core (207). The outer side of the movable valve core (207) is equipped with a magnetic shielding ring (213). The outer side of the magnetic shielding ring (213) is equipped with a coil (208). The coil (208) is connected to the valve body shell through a dustproof ring (214). The valve body shell is set on the outer wall of the oil storage cylinder (2). The valve core base (212) and the valve body shell are sealed by a fifth O-ring (211).

3. The air spring shock absorber with adjustable stiffness and height according to claim 1, characterized in that: The mounting plate (17) is provided with a connecting bolt (15) on the inner side, and a connecting nut (16) is threaded to the outer side of the end of the connecting bolt (15).

4. The air spring shock absorber with adjustable stiffness and height according to claim 2, characterized in that: The pad (203) is snapped into the inner wall of the valve body housing.

5. The air spring shock absorber with adjustable stiffness and height according to claim 1, characterized in that: The gas protection valve (14) is connected to the vehicle's on-board air pump via a pipeline.

6. The air spring shock absorber with adjustable stiffness and height according to claim 1, characterized in that: The connecting fork arm (4) has mounting holes.

7. The air spring shock absorber with adjustable stiffness and height according to claim 1, characterized in that: The sidewall of the second piston (9) is a conical structure and the diameter of one end near the end (21) is larger than that of the other end.

8. The air spring shock absorber with adjustable stiffness and height according to claim 1, characterized in that: An anti-collision cover is provided on the outer side of the lower end of the oil storage cylinder (2).

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