Shock absorber with bidirectional frequency self-adaptive damping adjustment function

Abstract

The utility model discloses a two-way frequency self-adaption damping adjusting shock absorber, which relates to the field of suspension shock absorbers, and comprises an oil storage barrel, a working cylinder, a bottom valve, a piston rod and a self-adaption damping adjusting valve, the oil storage barrel is sleeved outside the working cylinder, an end cover is arranged at the upper end of the oil storage barrel, and a bottom cover is arranged at the lower end of the oil storage barrel; the piston rod penetrates through the working cylinder in a relatively sliding mode, the upper end of the piston rod penetrates out of the end cover, the piston valve is installed at the lower end of the piston rod, and the self-adaptive damping adjusting valve is installed on the lower portion of the piston valve. The bottom valve comprises a bottom valve seat fixed to a lower opening of the working cylinder, a screw penetrates through the center of the bottom valve seat, and another self-adaptive damping adjusting valve is arranged on the lower portion of the bottom valve seat. According to the utility model, when the shock absorber does the recovery stroke, the recovery damping force can be changed according to the vibration condition of the shock absorber, and similarly, when the shock absorber does the compression stroke, the compression damping force can be changed according to the vibration condition of the shock absorber. And when the shock absorber performs high-frequency vibration, the riding comfort is improved.

Description

Technical Field

[0001] The utility model relates to the field of suspension shock absorbers, and particularly relates to a shock absorber with bidirectional frequency adaptive damping adjustment. Background Art

[0002] As Figure 1 shown in the figure is the structure of an existing shock absorber, which includes an oil storage cylinder and a working cylinder. An oil storage cavity A (1’) is formed between the oil storage cylinder and the working cylinder. A piston valve A (3’) is arranged in the working cylinder. The piston valve A divides the working cylinder into a rebound cavity A (2’) and a compression cavity A (4’). The compression cavity A is communicated with the oil storage cavity A through a bottom valve A (5’).

[0003] When the shock absorber piston makes a rebound stroke, under the action of the pressure difference, the oil flows from the rebound cavity to the compression cavity. The oil flows through the small flow channels of the piston valve to form a rebound damping force. When the shock absorber piston makes a compression stroke, under the action of the pressure difference, the oil flows from the compression cavity to the oil storage cavity. The oil flows through the small flow channels of the piston valve to form a compression damping force.

[0004] Since the rebound damping force cannot be adjusted after the shock absorber is manufactured. Similarly, the compression damping force cannot be adjusted after the shock absorber is manufactured. When the shock absorber vibrates at a high frequency, due to the relatively large damping force, the riding comfort is not good. Content of the Utility Model

[0005] The purpose of the utility model is to overcome the deficiencies existing in the prior art, and provide a shock absorber with bidirectional frequency adaptive damping adjustment, so that when the shock absorber makes a rebound stroke, the rebound damping force can be changed according to the vibration condition of the shock absorber. Similarly, when the shock absorber makes a compression stroke, the compression damping force can also be changed according to the vibration condition of the shock absorber. When the shock absorber vibrates at a high frequency, the riding comfort is improved.

[0006] The purpose of the utility model is achieved by the following technical solutions: This shock absorber with bidirectional frequency adaptive damping adjustment includes an oil storage cylinder, a working cylinder, a bottom valve, a piston rod and an adaptive damping regulating valve. The oil storage cylinder is sleeved outside the working cylinder. An oil storage cavity is formed between the oil storage cylinder and the working cylinder. The upper end of the oil storage cylinder is provided with an end cover for pressing the oil seal assembly against the upper opening of the working cylinder. The lower end of the oil storage cylinder is provided with a bottom cover. The piston rod is slidably arranged in the working cylinder. The upper end of the piston rod passes through the end cover. The lower end of the piston rod is provided with a piston valve. An adaptive damping regulating valve is installed below the piston valve. A rebound cavity is formed in the working cylinder above the piston valve. A compression cavity is formed in the working cylinder below the piston valve. The bottom valve includes a bottom valve seat fixed to the lower opening of the working cylinder. A screw rod is arranged through the center of the bottom valve seat. Another adaptive damping regulating valve is arranged below the bottom valve seat. The bottom valve disc is pressed against the bottom valve seat through this adaptive damping regulating valve to achieve bidirectional frequency adaption.

[0007] As a further technical solution, the adaptive damping regulating valve includes an upper energy storage cavity, a lower energy storage cavity and a connecting member for connecting the two. A plurality of oil outlet holes communicating with the upper energy storage cavity are opened at the top of the adaptive damping regulating valve. During low-frequency movement, there is oil pressure in the lower energy storage cavity to balance with the upper energy storage cavity, so that the regulating valve disc in the upper energy storage cavity is pressed tightly, that is, the oil outlet holes are closed; during high-frequency movement, the oil pressure in the lower energy storage cavity is removed, and the oil in the upper energy storage cavity pushes open the regulating valve disc, thereby opening the oil outlet holes to achieve the reduction of the damping force.

[0008] As a further technical solution, a plurality of bottom valve flow channels are circumferentially opened on the bottom valve seat, and bottom valve discs are provided at both the upper and lower ends of the bottom valve flow channels.

[0009] As a further technical solution, a central hole is opened in the center of the screw rod, and the central hole communicates with the adaptive damping regulating valve on the bottom valve seat, and a retaining ring is arranged on the outer periphery of the screw rod.

[0010] The beneficial effects of the present utility model are as follows:

[0011] 1. A frequency adaptive damping regulating valve is installed on the piston valve. When the piston rod vibrates at a high frequency, the frequency adaptive damping regulating valve can open the valve and achieve the purpose of reducing the restoring damping force;

[0012] 2. A frequency adaptive damping regulating valve is installed in the bottom valve. When the piston rod vibrates at a high frequency, the frequency adaptive damping regulating valve can open the valve and achieve the purpose of reducing the compression damping force. Moreover, when the piston rod vibrates at a high frequency, reducing the damping force can improve the riding comfort and enhance the user experience. Description of the Drawings

[0013] Figure 1 It is a schematic structural diagram of the prior art.

[0014] Figure 2 It is a schematic structural diagram of the present utility model.

[0015] Figure 3 It is a schematic cross-sectional structural diagram of the bottom valve in the present utility model.

[0016] Figure 4 It is a schematic structural diagram of the adaptive damping regulating valve in the present utility model.

[0017] Figure 5 It is a schematic structural diagram of the adaptive damping regulating valve in the present utility model in the closed state.

[0018] Figure 6 It is a schematic structural diagram of the adaptive damping regulating valve in the present utility model in the open state.

[0019] Figure 7 This is a schematic diagram of the oil flow of the bottom valve of the present utility model during the restoration stroke.

[0020] Figure 8 This is a schematic diagram of the oil flow of the bottom valve of the present utility model during the compression stroke.

[0021] Explanation of the reference numerals in the drawings: oil storage cavity A1', restoration cavity A2', piston valve A3', compression cavity A4', bottom valve A5';

[0022] Oil storage cylinder 1, working cylinder 2, oil storage cavity 3, restoration cavity 4, piston valve 5, compression cavity 6, bottom valve 7, piston rod 8, end cap 9, oil seal assembly 10, adaptive damping regulating valve 11, screw rod 12, retaining ring 13, bottom valve seat 14, bottom valve disc 15, bottom valve flow channel 16, central hole 17, bottom cover 18, upper energy storage cavity 19, lower energy storage cavity 20, connecting member 21, regulating valve disc 22, oil outlet hole 23. Detailed implementation manners

[0023] The following will introduce the present utility model in detail with reference to the drawings:

[0024] Embodiment: As shown in the attached Figures 2 to 8 figures, this shock absorber with two-way frequency adaptive damping adjustment includes an oil storage cylinder 1, a working cylinder 2, an oil storage cavity 3, a restoration cavity 4, a piston valve 5, a compression cavity 6, a bottom valve 7, a piston rod 8, an end cap 9, an oil seal assembly 10, an adaptive damping regulating valve 11, a screw rod 12, a retaining ring 13, a bottom valve seat 14, a bottom valve disc 15, a bottom valve flow channel 16, a central hole 17, a bottom cover 18, an upper energy storage cavity 19, a lower energy storage cavity 20, a connecting member 21, a regulating valve disc 22, and an oil outlet hole 23.

[0025] Referring to the attached Figure 2 figures, the oil storage cylinder 1 is sleeved outside the working cylinder 2, and an oil storage cavity 3 is formed between the oil storage cylinder 1 and the working cylinder 2. The upper end of the oil storage cylinder 1 is provided with an end cap 9, which can press the oil seal assembly 10 against the upper opening of the working cylinder 2, and the lower end of the oil storage cylinder 1 is provided with a bottom cover 18. The piston rod 8 is slidably inserted into the working cylinder 2, the upper end of the piston rod 8 passes through the end cap 9, the lower end of the piston rod 8 is provided with a piston valve 5, and an adaptive damping regulating valve 11 is installed below the piston valve 5. A restoration cavity 4 is formed in the working cylinder 2 above the piston valve 5, and a compression cavity 6 is formed in the working cylinder 2 below the piston valve 5.

[0026] As shown in Figure 2 、 3 figures, the bottom valve 7 includes a bottom valve seat 14 fixed to the lower opening of the working cylinder 2. A screw rod 12 is inserted through the center of the bottom valve seat 14, and another adaptive damping regulating valve 11 is provided below the bottom valve seat 14. The bottom valve disc 15 is pressed against the bottom valve seat 14 through this adaptive damping regulating valve 11 to achieve two-way frequency adaptability.

[0027] Further, referring to the attached Figure 4 , the adaptive damping regulating valve 11 includes an upper energy storage chamber 19, a lower energy storage chamber 20, and a connecting member 21 for connecting the upper energy storage chamber 19 and the lower energy storage chamber 20. A plurality of oil outlet holes 23 communicating with the upper energy storage chamber 19 are opened at the top of the adaptive damping regulating valve 11. During low-frequency movement, there is oil pressure in the lower energy storage chamber 20 that balances with the upper energy storage chamber 19, so that the regulating valve disc 22 in the upper energy storage chamber 19 is pressed tightly, that is, the oil outlet holes 23 are closed, as shown in Figure 5 (the arrows in the figure indicate the oil flow direction). During high-frequency movement, the oil pressure in the lower energy storage chamber 20 is removed, and the oil in the upper energy storage chamber 19 pushes open the regulating valve disc 22, thereby opening the oil outlet holes 23 to achieve a reduction in damping force, as shown in Figure 6 (the arrows in the figure indicate the oil flow direction).

[0028] Further, a plurality of bottom valve flow channels 16 are circumferentially opened on the bottom valve seat 14, and bottom valve discs 15 are provided at both the upper and lower ends of the bottom valve flow channels 16. Referring to the attached Figure 3 . At the same time, a central hole 17 is opened in the center of the screw 12, and the central hole 17 communicates with the adaptive damping regulating valve 11 (upper energy storage chamber 19) on the bottom valve seat 14, and a retaining ring 13 is provided on the outer circumference of the screw 12.

[0029] Working process of the present utility model:

[0030] As shown in Figure 5 , when the adaptive damping regulating valve 11 is in low-frequency movement, there is oil and oil pressure in the lower energy storage chamber 20, and the oil pressure in the upper energy storage chamber 19 cannot push open the regulating valve disc 22, that is, the state of not opening the valve as shown in Figure 5 .

[0031] When the adaptive damping regulating valve 11 is in high-frequency movement, the lower energy storage chamber 20 cannot accumulate enough oil to form oil pressure, and the oil pressure in the upper energy storage chamber 19 can push open the regulating valve disc 22 to achieve the effect of reducing the damping force, that is, the open valve state as shown in Figure 6 , and the oil flows out from the oil outlet holes 23 in the direction of the arrows in the figure.

[0032] During the return stroke, the oil in the bottom valve seat 14 pushes open the bottom valve disc 15 from below the bottom valve seat 14 and flows upward, as shown by the arrow direction in Figure 7 .

[0033] During the compression stroke, when the conversion frequency between the return stroke and the compression stroke is relatively low, the oil pushes open the bottom valve disc 15 from above the bottom valve seat 14 and flows downward, as shown in Figure 8as shown by the upper arrow; when the frequency of the recovery stroke and the compression stroke alternates high, during the compression stroke, the adaptive damping regulating valve 11 will open, and the hydraulic oil will also flow into the upper energy storage cavity 19 of the adaptive damping regulating valve 11 from the central hole 17 in the middle of the screw 12 and flow out from the oil outlet holes 23 on both sides of the adaptive damping regulating valve 11, as Figure 8 shown by the lower arrow.

[0034] Term Explanation:

[0035] Shock absorber: It is used to suppress the shock during the rebound of the spring after absorbing shock and the impact from the road surface. It is widely used in automobiles to accelerate the attenuation of the vibration of the frame and the body, so as to improve the ride comfort of the automobile.

[0036] Damper force: When the hydraulic oil flows through the throttle hole or small hole under the action of the pressure difference, it will hinder the flow of the hydraulic oil

[0037] Pistion valve: When the shock absorber piston makes a recovery stroke, the hydraulic oil flows through the fine flow channel of the piston valve to form a recovery damping force.

[0038] Base valve: When the shock absorber piston makes a compression stroke, the hydraulic oil flows through the fine flow channel of the base valve to form a compression damping force.

[0039] Frequency adaptive damping regulating valve: When the frequency of the up and down movement of the shock absorber piston is high, the frequency adaptive damping regulating valve will open, causing the damping force to decrease.

[0040] It can be understood that for those skilled in the art, any equivalent replacement or change to the technical solution and the inventive concept of the present invention should fall within the protection scope of the claims attached to the present invention.

Claims

1. A shock absorber with bidirectional frequency adaptive damping adjustment, characterized in that: It includes an oil storage cylinder (1), a working cylinder (2), a bottom valve (7), a piston rod (8) and an adaptive damping regulating valve (11). The oil storage cylinder (1) is sleeved outside the working cylinder (2). An end cover (9) is installed at the upper end of the oil storage cylinder (1) to press the oil seal assembly (10) against the upper opening of the working cylinder (2). A bottom cover (18) is installed at the lower end of the oil storage cylinder (1). The piston rod (8) is slidably inserted into the working cylinder (2). The upper end of the piston rod (8) passes through the end cover (9). A piston valve (5) is installed at the lower end of the piston rod (8), and an adaptive damping regulating valve (11) is installed below the piston valve (5). The bottom valve (7) includes a bottom valve seat (14) fixed to the lower opening of the working cylinder (2). A screw rod (12) passes through the center of the bottom valve seat (14). Another adaptive damping regulating valve (11) is arranged below the bottom valve seat (14). The bottom valve disc (15) is pressed against the bottom valve seat (14) through this adaptive damping regulating valve (11) to achieve bidirectional frequency adaption.

2. The shock absorber with bidirectional frequency adaptive damping adjustment according to claim 1, wherein: The adaptive damping regulating valve (11) includes an upper energy storage cavity (19), a lower energy storage cavity (20) and a connecting member (21) for connecting the two. A number of oil outlet holes (23) communicating with the upper energy storage cavity (19) are opened at the top of the adaptive damping regulating valve (11). During low-frequency movement, there is oil pressure in the lower energy storage cavity (20) to balance with the upper energy storage cavity (19), so that the regulating valve disc (22) in the upper energy storage cavity (19) is pressed, that is, the oil outlet holes (23) are closed. During high-frequency movement, the oil pressure in the lower energy storage cavity (20) is removed, and the oil in the upper energy storage cavity (19) pushes open the regulating valve disc (22), and then the oil outlet holes (23) are opened to achieve a reduction in damping force.

3. The shock absorber with bidirectional frequency adaptive damping adjustment according to claim 2, characterized in that: A number of bottom valve flow channels (16) are circumferentially opened along the upper edge of the bottom valve seat (14), and bottom valve discs (15) are provided at both the upper and lower ends of the bottom valve flow channels (16).

4. The shock absorber with bidirectional frequency adaptive damping adjustment according to claim 3, characterized in that: A central hole (17) is opened in the center of the screw rod (12), and the central hole (17) communicates with the adaptive damping regulating valve (11) on the bottom valve seat (14). A retaining ring (13) is arranged on the outer periphery of the screw rod (12).

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