Stepless speed change damping shock absorber

Abstract

The utility model discloses a stepless speed change damping shock absorber which comprises a fork arm, the end portion of the fork arm is connected with an oil storage cylinder, a compression valve is arranged at the contact position of the oil storage cylinder and the fork arm, an anti-collision gland is arranged at the end portion of the oil storage cylinder, a working cylinder is arranged on the inner side of the oil storage cylinder, and an upper spring seat is arranged at the end portion of the working cylinder. A first spring is arranged on the inner side of the spring seat, a piston rod is arranged on the inner side of the first spring, a recovery valve is arranged at the bottom of the piston rod, a connecting piece is arranged on the outer side of the top of the piston rod through a nylon locking nut, top rubber is arranged on the outer side of the connecting piece, an end is arranged on the outer side of the top rubber, and a gland is arranged on the inner side of the end through a check ring. According to the utility model, the recovery damping force and the compression damping force can be independently adjusted, the adjustment burden of the electromagnetic valve is reduced, and the stepless damping adjustment function can be realized.

Description

Technical Field

[0001] The present utility model application relates to the technical field of shock absorbers, and specifically relates to a continuously variable damping shock absorber. Background Art

[0002] Currently, shock absorbers mainly use air springs and mechanical springs to achieve damping adjustment. When the vehicle frame and axle make reciprocating relative movements, the piston in the shock absorber makes reciprocating movements in the cylinder barrel. The kinetic energy is converted into potential energy through the deformation of the air spring or mechanical spring, and then it is pushed to make the oil in the shock absorber housing repeatedly flow from one inner cavity through some narrow pores into another inner cavity. At this time, the friction between the pore wall and the oil and the internal friction of the liquid molecules form a damping force for vibration, converting the vibration energy of the vehicle body and the vehicle frame into heat energy. The heat energy is absorbed by the oil and the shock absorber housing, and then dissipated into the air. The mainstream shock absorbers are damping adjustable shock absorbers, especially electronically controlled shock absorbers. They can detect the driving state through sensors, calculate the optimal damping force by a computer, and make the damping force adjustment mechanism on the shock absorber work automatically. The damping force of the shock absorber is adjusted by changing the size of the throttle hole and other methods.

[0003] Traditional damping adjustable shock absorbers have only one solenoid valve. When vibration occurs, the driving state is detected through sensors to make the solenoid valve on the shock absorber work, realizing the adjustment of the compression and rebound damping force values. This adjustment method can only increase or decrease the compression and rebound damping force values simultaneously, increasing the adjustment burden of the solenoid valve and greatly shortening the service life of the solenoid valve.

[0004] During the driving process of an automobile, the jumping of the wheels will cause the vehicle suspension to move together. During this process, the shock absorber will experience states such as telescoping and torsion. When in the torsion state, the shock absorber will also twist. If the torsion cannot be released, it will accelerate the failure of the shock absorber, thereby reducing the service life of the shock absorber.

[0005] Therefore, designing a shock absorber that can independently adjust the rebound damping force and the compression damping force, reduce the adjustment burden of the solenoid valve, and can perform continuously variable damping adjustment is exactly the problem to be solved by the inventor. Summary of the Utility Model

[0006] Aiming at the deficiencies of the prior art, the purpose of the present utility model is to provide a continuously variable damping shock absorber, which can achieve the functions of independently adjusting the rebound damping force and the compression damping force, reducing the adjustment burden of the solenoid valve, and performing continuously variable damping adjustment.

[0007] The technical solution adopted by the device of the utility model is as follows: a stepless variable damping shock absorber, which includes a fork arm. A storage oil cylinder is connected to the end of the fork arm. A compression valve is arranged at the contact part of the storage oil cylinder and the fork arm. An anti-collision gland is arranged at the end of the storage oil cylinder. A working cylinder is arranged inside the storage oil cylinder. An upper spring seat is arranged at the end of the working cylinder. A first spring is arranged inside the spring seat. A piston rod is arranged inside the first spring. A return valve is arranged at the bottom of the piston rod. A connecting piece is arranged at the outer side of the top of the piston rod through a nylon lock nut. A top rubber is arranged at the outer side of the connecting piece. A head is arranged at the outer side of the top rubber. A gland is arranged inside the head through a retaining ring. A circlip for hole is arranged between the inner walls of the connecting piece and the head. A buffer bearing is arranged inside the head below the circlip for hole. An inner buffer rubber is arranged at the lower end of the head and at the outer side of the piston rod. A leather bag is connected to the lower end of the head through a large snap ring. A support ring is arranged inside the leather bag. An aluminum cover is arranged at the outer side of the leather bag. The aluminum cover, the leather bag and the support ring are clamped together. A piston is connected to the lower end of the leather bag through a small snap ring. The lower inner side of the piston is hermetically connected to the main oil cylinder through a first O-ring. A washer is arranged below the first O-ring. A baffle is arranged at the outer side wall of the storage oil cylinder and below the washer. A return storage oil cylinder is arranged at the outer side of the working cylinder through a seal. A compression storage oil cylinder is arranged at the outer side of the working cylinder through a seal below the return storage oil cylinder. A return control valve is assembled at the lower part of the storage oil cylinder. A compression damping regulating valve is assembled at the lower part of the storage oil cylinder below the return control valve.

[0008] Further, the return control valve includes a return control valve seat. A multi-layer of opposed springs is arranged inside the return control valve seat. A return damping regulating valve is arranged at the outer side of the return control valve seat.

[0009] Further, the return damping regulating valve has the same structure as the compression damping regulating valve.

[0010] Further, both the return storage oil cylinder and the compression storage oil cylinder are communicated with the working cylinder.

[0011] Further, the return storage oil cylinder is communicated with the return control valve.

[0012] Further, the compression storage oil cylinder is communicated with the compression damping regulating valve.

[0013] Further, an external air tank is connected to the side of the head through a second O-ring. The housing of the external air tank is connected to the head through a connecting bolt.

[0014] Further, a pressure maintaining inflation valve is arranged at the lower end of the external air tank. An inflation nozzle is arranged at the lower end of the pressure maintaining inflation valve.

[0015] Furthermore, the restoration damping regulating valve includes a housing, a coil is arranged inside the housing, a valve core housing is arranged inside the coil, a movable valve stem is arranged inside the valve core housing, a check valve is connected to the end of the movable valve stem, a throttle valve seat is connected to the end of the check valve, a compression control valve seat is arranged on the side of the throttle valve seat, a spring is arranged between the compression control valve seat and the throttle valve seat, and a valve body housing is arranged between the throttle valve seat and the valve core housing.

[0016] The beneficial effects of the device of the present utility model are as follows:

[0017] 1. The compression damping force and the restoration damping force of the present utility model can be adjusted independently. Compared with the traditional damping adjustment, which can only increase or decrease the compression damping force and the restoration damping force simultaneously, the continuously variable damping can increase the compression damping force while reducing the restoration damping force or increasing the restoration damping force less than the compression damping force. Similarly, when the restoration damping force increases, the compression damping force decreases or increases less than the restoration damping force. In this way, an infinite number of permutations and combinations can be achieved, thereby forming a continuously variable damping, realizing the function of independently adjusting the restoration damping force and the compression damping force, reducing the adjustment burden of the solenoid valve, and enabling continuously variable damping adjustment. Description of the Drawings

[0018] Figure 1 It is a structural view of the present utility model.

[0019] Figure 2 It is an internal structural view of the present utility model.

[0020] Figure 3 It is a structural view of the restoration damping regulating valve of the present utility model.

[0021] Figure 4 It is a structural view of the compression damping regulating valve of the present utility model.

[0022] Figure 5 It is a structural view of the external air tank of the present utility model.

[0023] Description of the reference numerals: 1 - retaining ring; 2 - end; 3 - top rubber; 4 - buffer bearing; 5 - inner buffer rubber; 6 - support ring; 7 - airbag; 8 - aluminum cover; 9 - piston; 10 - oil storage cylinder; 11 - baffle; 12 - recovery control valve; 13 - recovery damping regulating valve; 14 - compression damping regulating valve; 15 - fork arm; 16 - compression valve; 17 - compression oil storage cylinder; 18 - recovery oil storage cylinder; 19 - recovery valve; 20 - washer; 21 - first O-ring; 22 - working cylinder; 23 - piston rod; 24 - anti-collision gland; 25 - small snap ring; 26 - large snap ring; 27 - external air tank; 28 - second O-ring; 29 - hole retaining ring; 30 - gland; 31 - nylon lock nut; 1201 - recovery control valve seat; 1202 - multi-layer opposed springs; 1301 - compression control valve seat; 1302 - spring; 1303 - throttle valve seat; 1304 - valve body housing; 1305 - spool housing; 1306 - check valve; 1307 - movable valve stem; 1308 - coil; 2701 - connecting bolt; 2702 - pressure maintaining inflation valve; 2703 - inflation nozzle. Detailed implementation manners

[0024] The following further elaborates on the device of the present utility model in combination with specific embodiments. These embodiments are only used to illustrate the present utility model and not to limit the scope of the present utility model. In addition, it should be understood that after reading the content taught by the device of the present utility model, those skilled in the art can make various changes or modifications to the present utility model, and these equivalent forms also fall within the scope defined by the appended claims of the application.

[0025] Embodiment 1: Refer to Figures 1 to 5It is the structural view of the present utility model, the internal structural view, the structural view of the restoration damping regulating valve 13, the structural view of the compression damping regulating valve 14, and the structural view of the external air tank 27. A continuously variable damping shock absorber includes a fork arm 15. The end of the fork arm 15 is connected to an oil storage cylinder 10. A compression valve 16 is provided at the contact of the oil storage cylinder 10 with the fork arm 15. An anti-collision gland 24 is provided at the end of the oil storage cylinder 10. A working cylinder 22 is provided inside the oil storage cylinder 10. An upper spring 1302 seat is provided at the end of the working cylinder 22. A first spring is provided inside the spring 1302 seat. A piston rod 23 is provided inside the first spring. A restoration valve 19 is provided at the bottom of the piston rod 23. A connecting member is provided at the outer side of the top of the piston rod 23 through a nylon lock nut 31. A top rubber 3 is provided at the outer side of the connecting member. A head 2 is provided at the outer side of the top rubber 3. A gland 30 is provided inside the head 2 through a retaining ring 1. A hole-type elastic retaining ring 29 is provided between the connecting member and the inner wall of the head 2. A buffer bearing 4 is provided inside the head 2 below the hole-type elastic retaining ring 29. An inner buffer rubber 5 is provided at the outer side of the piston rod 23 at the lower end of the head 2. A rubber bladder 7 is connected to the lower end of the head 2 through a large snap ring 26. A support ring 6 is provided inside the rubber bladder 7. An aluminum cover 8 is provided at the outer side of the rubber bladder 7. The aluminum cover 8, the rubber bladder 7, and the support ring 6 are clamped together. The lower end of the rubber bladder 7 is connected to a piston 9 through a small snap ring 25. The lower inner side of the piston 9 is hermetically connected to the main oil cylinder through a first O-ring 21. A washer 20 is provided below the first O-ring 21. A baffle 11 is provided on the outer wall of the oil storage cylinder 10 below the washer 20. A restoration oil storage cylinder 18 is provided outside the working cylinder 22 through a seal. A compression oil storage cylinder 17 is provided outside the working cylinder 22 below the restoration oil storage cylinder 18 through a seal. A restoration control valve 12 is assembled at the lower part of the oil storage cylinder 10. A compression damping regulating valve 14 is assembled at the lower part of the oil storage cylinder 10 below the restoration control valve 12.

[0026] The restoration control valve 12 includes a restoration control valve seat 1201. A multi-layer opposed spring 1202 is provided inside the restoration control valve seat 1201. A restoration damping regulating valve 13 is provided outside the restoration control valve seat 1201. The restoration damping regulating valve 13 has the same structure as the compression damping regulating valve 14. The restoration oil storage cylinder 18 and the compression oil storage cylinder 17 are both connected to the working cylinder 22. The restoration oil storage cylinder 18 is connected to the restoration control valve 12. The compression oil storage cylinder 17 is connected to the compression damping regulating valve 14.

[0027] The side of the head 2 is connected to an external air tank 27 through a second O-ring 28. The shell of the external air tank 27 is connected to the head 2 through a connecting bolt 2701.

[0028] A pressure maintaining inflation valve 2702 is provided at the lower end of the external air tank 27. An inflation nozzle 2703 is provided at the lower end of the pressure maintaining inflation valve 2702.

[0029] The recovery damping regulating valve 13 includes a housing, with a coil 1308 arranged inside the housing, a valve core housing 1305 arranged inside the coil 1308, a movable valve rod 1307 arranged inside the valve core housing 1305, a check valve 1306 connected to the end of the movable valve rod 1307, a throttle valve seat 1303 connected to the end of the check valve 1306, a compression control valve seat 1301 arranged on the side of the throttle valve seat 1303, a spring 1302 arranged between the compression control valve seat 1301 and the throttle valve seat 1303, and a valve body housing 1304 arranged between the throttle valve seat 1303 and the valve core housing 1305.

[0030] The vehicle can adjust the soft and hard states of the suspension according to the driving state, and correspondingly adjust the compression and recovery damping forces. The compression damping force and the recovery damping force can be adjusted continuously and independently. Compared with the traditional damping adjustment that can only increase or decrease the compression damping force and the recovery damping force simultaneously, the continuously variable damping can increase the compression damping force while reducing the recovery damping force or increasing the recovery damping force by less than the increase in the compression damping force. Similarly, when the recovery damping force increases, the compression damping force decreases or increases by less than the increase in the recovery damping force. In this way, an infinite number of permutations and combinations can be achieved, thereby forming a continuously variable damping.

[0031] In the utility model, the compression damping force and the recovery damping force can be adjusted independently. Compared with the traditional damping adjustment that can only increase or decrease the compression damping force and the recovery damping force simultaneously, the continuously variable damping can increase the compression damping force while reducing the recovery damping force or increasing the recovery damping force by less than the increase in the compression damping force. Similarly, when the recovery damping force increases, the compression damping force decreases or increases by less than the increase in the recovery damping force. In this way, an infinite number of permutations and combinations can be achieved, thereby forming a continuously variable damping, realizing the function of independently adjusting the recovery damping force and the compression damping force, reducing the adjustment burden of the solenoid valve, and enabling continuously variable damping adjustment.

Claims

1. A stepless variable damping shock absorber, characterized in that: It includes a fork arm (15), with an oil storage cylinder (10) connected to the end of the fork arm (15). A compression valve (16) is provided at the contact position between the oil storage cylinder (10) and the fork arm (15). An anti-collision gland (24) is provided at the end of the oil storage cylinder (10). A working cylinder (22) is arranged inside the oil storage cylinder (10). An upper spring (1302) seat is provided at the end of the working cylinder (22). A first spring is arranged inside the spring (1302) seat. A piston rod (23) is arranged inside the first spring. A return valve (19) is provided at the bottom of the piston rod (23). A connecting member is provided at the outer side of the top of the piston rod (23) through a nylon lock nut (31). A top rubber (3) is arranged at the outer side of the connecting member. A head (2) is arranged at the outer side of the top rubber (3). A gland (30) is arranged inside the head (2) through a retaining ring (1). A hole-type snap ring (29) is arranged between the connecting member and the inner wall of the head (2). A buffer bearing (4) is arranged inside the head (2) and below the hole-type snap ring (29). An inner buffer rubber (5) is arranged at the lower end of the head (2) and on the outer side of the piston rod (23). A leather bag (7) is connected to the lower outer side of the head (2) through a large snap ring (26). A support ring (6) is arranged inside the leather bag (7). An aluminum cover (8) is arranged at the outer side of the leather bag (7). The aluminum cover (8), the leather bag (7), and the support ring (6) are clamped together. The lower end of the leather bag (7) is connected to a piston (9) through a small snap ring (25). The lower inner side of the piston (9) is hermetically connected to the main oil cylinder through a first O-ring (21). A washer (20) is arranged below the first O-ring (21). A baffle (11) is arranged on the outer wall of the oil storage cylinder (10) and below the washer (20). A return oil storage cylinder (18) is arranged on the outer side of the working cylinder (22) through a seal. A compression oil storage cylinder (17) is arranged on the outer side of the working cylinder (22) and below the return oil storage cylinder (18) through a seal. A return control valve (12) is assembled at the lower part of the oil storage cylinder (10). A compression damping regulating valve (14) is assembled at the lower part of the oil storage cylinder (10) and below the return control valve (12).

2. The stepless variable damping shock absorber according to claim 1, characterized in that: The return control valve (12) includes a return control valve seat (1201), with multiple layers of opposed springs (1202) arranged inside the return control valve seat (1201). A return damping regulating valve (13) is arranged at the outer side of the return control valve seat (1201).

3. A stepless variable damping shock absorber according to claim 2, characterized in that: The return damping regulating valve (13) has the same structure as the compression damping regulating valve (14).

4. A stepless variable damping shock absorber according to claim 1, characterized in that: Both the return oil storage cylinder (18) and the compression oil storage cylinder (17) are communicated with the working cylinder (22).

5. The continuously variable damping shock absorber according to claim 4, characterized in that: The return oil storage cylinder (18) is communicated with the return control valve (12).

6. A stepless variable damping shock absorber according to claim 4, characterized in that: The compression oil storage cylinder (17) is communicated with the compression damping regulating valve (14).

7. A stepless variable damping shock absorber according to claim 1, characterized in that: The side of the end head (2) is connected with an external gas tank (27) through a second O-ring (28), and the shell of the external gas tank (27) is connected with the end head (2) through connecting bolts (2701).

8. A stepless variable damping shock absorber according to claim 7, characterized in that: A pressure maintaining inflation valve (2702) is arranged at the lower end of the external gas tank (27), and an inflation nozzle (2703) is arranged at the lower end of the pressure maintaining inflation valve (2702).

9. A stepless variable damping shock absorber according to claim 3, characterized in that: The restoration damping regulating valve (13) comprises a shell, a coil (1308) is arranged inside the shell, a valve core housing (1305) is arranged inside the coil (1308), a movable valve rod (1307) is arranged inside the valve core housing (1305), a check valve (1306) is connected to the end of the movable valve rod (1307), a throttle valve seat (1303) is connected to the end of the check valve (1306), a compression control valve seat (1301) is arranged on the side of the throttle valve seat (1303), a spring (1302) is arranged between the compression control valve seat (1301) and the throttle valve seat (1303), and a valve body housing (1304) is arranged between the throttle valve seat (1303) and the valve core housing (1305).

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