Frequency self-adaptive shock absorber, shock absorber piston, chassis system and vehicle

Abstract

The invention provides a frequency self-adaptive shock absorber, a shock absorber piston, a chassis system and a vehicle, and aims to solve the problems that the shock absorption effect of the vehicle is poor, and particularly, the vibration of the vehicle is obvious when the vehicle is subjected to high-frequency vibration so as to improve the driving and riding comfort of the vehicle. The frequency self-adaptive shock absorber comprises a cylinder barrel, an oil storage cavity and a piston and further comprises a buffering cavity formed in the piston, a valve assembly dividing the buffering cavity into a left buffering cavity and a right buffering cavity is arranged in the buffering cavity, one end of the valve assembly is in sealing fit with the buffering cavity, and the other end of the valve assembly is also in sealing fit with the buffering cavity. The buffer cavities are provided with oil outlet holes formed between the two ends of the valve assembly, the valve assembly can move along the buffer cavities, the valve assembly is provided with a first reset elastic piece enabling the valve assembly to reset, and the pressed area, located on one side of the left buffer cavity, of the valve assembly is smaller than or equal to the pressed area, located on one side of the right buffer cavity, of the valve assembly. And a sliding block which is in sliding and sealing fit with the right buffer cavity is arranged in the right buffer cavity.

Description

Technical Field

[0001] The invention relates to the technical field of shock absorbers, in particular to a frequency adaptive shock absorber and a piston assembly thereof. Background Art

[0002] Shock absorbers, also called vibration dampers, are devices that accelerate the attenuation of vibrations between the frame and the body to improve the ride smoothness of the car. Shock absorbers are mostly hydraulic, and their working principle is that when the frame and the axle vibrate relative to each other, the piston in the shock absorber is driven to move up and down. Specifically, when the shock absorber is compressed, the piston moves downward, the volume of the upper chamber increases, and the volume of the lower chamber decreases. The flow valve on the piston opens, and the oil in the lower chamber enters the upper chamber through the flow valve. At the same time, part of the oil opens the bottom compression valve and enters the oil storage cylinder; when the shock absorber is extended, the piston moves upward, the volume of the upper chamber decreases and the volume of the lower chamber increases. The extension valve on the piston opens, and the oil in the upper chamber enters the lower chamber through the extension valve. At the same time, part of the oil opens the compensation valve and enters the lower chamber from the oil storage cylinder. The throttling effect of the flow valve and the compression valve on the oil causes the shock absorber to produce a damping effect during compression movement. The throttling effect of the extension valve and the compensation valve on the oil causes the shock absorber to produce a damping effect during compression movement. The valve system characteristics of existing shock absorbers are only the relationship between force and speed. When a car is driving on a high-frequency road surface such as a cobblestone road, the shock absorbing effect of the shock absorber is poor, the vibration of the car will be very obvious, and the driving comfort cannot be guaranteed. Summary of the invention

[0003] The technical problem to be solved by the present invention is to provide a frequency adaptive shock absorber, a shock absorber piston, a chassis system and a vehicle to solve the problem of poor shock absorption effect of the automobile, especially the obvious vibration of the automobile when subjected to high-frequency vibration, so as to improve the driving comfort of the automobile.

[0004] The technical solution adopted by the present invention to solve its technical problems is: a frequency adaptive shock absorber, including a cylinder, an oil storage chamber and a piston arranged in the inner chamber of the cylinder and slidingly and sealingly matched with the inner chamber of the cylinder, the piston divides the inner chamber of the cylinder into a rod chamber and a rodless chamber, the rod chamber is provided with a piston rod with one end extending to the outside of the cylinder and the other end connected to the piston, the piston is provided with an extension valve that allows fluid to flow from the rod chamber to the rodless chamber in one direction, and is also provided with a flow valve that allows fluid to flow from the rodless chamber to the rod chamber in one direction, the bottom of the rodless chamber is provided with a valve that is connected to the oil storage chamber to provide fluid in and out of the oil storage chamber The damping structure for damping also includes a buffer chamber arranged on the piston, a valve assembly is arranged in the buffer chamber to divide the buffer chamber into a left buffer chamber and a right buffer chamber, one end of the valve assembly is sealed with the buffer chamber, and the other end is also sealed with the buffer chamber, an oil outlet hole is arranged between the two ends of the valve assembly on the buffer chamber, the valve assembly can move along the buffer chamber to make the left buffer chamber communicate with the oil outlet hole, a first reset elastic member is arranged on the valve assembly to reset the valve assembly, and the pressure area of ​​the valve assembly on the left buffer chamber side is less than or equal to the pressure area on the right buffer chamber side;

[0005] A slider is provided in the right buffer cavity, which slides and seals with the right buffer cavity. The slider divides the right buffer cavity into a left cavity and a right cavity and can slide toward the right cavity. The right cavity is connected to the rodless cavity. A second reset elastic member is provided on the slider to enable the slider to slide toward the left cavity.

[0006] A high-frequency shock-absorbing channel is provided in the piston, one end of which is connected to the rod cavity, the other end of the high-frequency shock-absorbing channel is provided with a first liquid outlet channel connected to the left buffer cavity, and a second liquid outlet channel connected to the left cavity is also provided, and the aperture of the second liquid outlet channel is smaller than the apertures of the high-frequency shock-absorbing channel and the first liquid outlet channel.

[0007] Furthermore, the pressure-bearing area of ​​the valve assembly on the left buffer chamber side is smaller than the pressure-bearing area on the right buffer chamber side.

[0008] Furthermore, the first resetting elastic member and the second resetting elastic member are both claw springs.

[0009] Furthermore, the damping structure includes a compression valve that allows the fluid to flow from the rodless chamber to the oil storage chamber in one direction, and a compensation valve that allows the fluid to flow from the oil storage chamber to the rodless chamber in one direction.

[0010] Furthermore, the cylinder includes an outer cylinder and an inner cylinder, the piston is arranged in the inner cylinder, and slides and seals with the inner cavity of the inner cylinder, the outer cylinder is sleeved on the inner cylinder, and a gap is provided between the side wall of the outer cylinder and the side wall of the inner cylinder to form the oil storage cavity.

[0011] The present invention also provides a shock absorber piston, wherein an extension valve is provided in the piston for allowing fluid to flow from a rod chamber to a rodless chamber in one direction, and a flow valve is provided in the piston for allowing fluid to flow from a rodless chamber to a rod chamber in one direction. A buffer chamber is provided at one end of the piston, and a valve assembly is provided in the buffer chamber for dividing the buffer chamber into a left buffer chamber and a right buffer chamber. One end of the valve assembly is in sealing cooperation with the buffer chamber, and the other end is also in sealing cooperation with the buffer chamber. An oil outlet hole is provided on the buffer chamber between the two ends of the valve assembly. The valve assembly can move along the buffer chamber to connect the left buffer chamber with the oil outlet hole. A first reset elastic member is provided on the valve assembly for resetting the valve assembly. The pressure area of ​​the valve assembly on the left buffer chamber side is less than or equal to the pressure area on the right buffer chamber side.

[0012] A slider is provided in the right buffer cavity, which slides and seals with the right buffer cavity. The slider divides the right buffer cavity into a left cavity and a right cavity and can slide toward the right cavity. The right cavity is provided with a through hole that can communicate with the rodless cavity. The slider is provided with a second reset elastic member that enables the slider to slide toward the left cavity.

[0013] A high-frequency shock-absorbing channel is provided in the piston, one end of which is connected to the rod chamber, the other end of the high-frequency shock-absorbing channel is provided with a first liquid outlet channel connected to the left buffer chamber, and a second liquid outlet channel connected to the left cavity is also provided, and the aperture of the second liquid outlet channel is smaller than the apertures of the high-frequency shock-absorbing channel and the first liquid outlet channel.

[0014] Furthermore, the pressure-bearing area of ​​the valve assembly on the left buffer chamber side is smaller than the pressure-bearing area on the right buffer chamber side.

[0015] Furthermore, the first resetting elastic member and the second resetting elastic member are both claw springs.

[0016] The present invention also provides a chassis system, which comprises the above-mentioned frequency adaptive shock absorber.

[0017] The present invention also provides a vehicle, comprising the above-mentioned chassis system.

[0018] The beneficial effects of the present invention are as follows: the frequency adaptive shock absorber, shock absorber piston, chassis system and vehicle of the present invention are provided with a buffer chamber 24 and other structures in the shock absorber piston, so that when the vibration frequency to which the shock absorber is subjected reaches a certain level, that is, when it is relatively high, the fluid pressure P1 in the left buffer chamber × the pressure area of ​​the valve assembly on the left buffer chamber side > the fluid pressure P2 in the left chamber × the pressure area of ​​the valve assembly on the right buffer chamber side + the elastic force of the first reset elastic member, so that the valve assembly 243 is subjected to a force moving toward the right buffer chamber 242, thereby pushing the valve assembly 243 to move and deforming the first reset elastic member 247, so that the valve assembly 243 opens the oil outlet 231, so that a part of the fluid can enter the rodless chamber from the high-frequency shock absorbing channel, the first liquid outlet channel and the oil outlet, thereby reducing the damping force of the shock absorber when subjected to high-frequency vibration, changing the original performance of the product, improving the shock absorbing effect of the shock absorber on the high-frequency vibration of the automobile, and improving the comfort of the entire vehicle. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a schematic diagram of the structure of the shock absorber of the present invention;

[0020] Figure 2 It is a schematic diagram of the piston structure of the present invention;

[0021] Figure 3 It is the use principle diagram of the shock absorber of the present invention;

[0022] Figure 4 is a structural diagram of a shock absorber cylinder of the present invention;

[0023] As shown in the figure: cylinder 1, piston 2, oil storage chamber 3, piston rod 4, compensation valve 5, compression valve 6, rod chamber 11, rodless chamber 12, outer cylinder 13, inner cylinder 14, extension valve 21, circulation valve 22, high-frequency shock absorbing channel 23, buffer chamber 24, oil outlet hole 231, first liquid outlet channel 232, second liquid outlet channel 233, left buffer chamber 241, right buffer chamber 242, valve assembly 243, slider 244, left cavity 245, right cavity 246, first reset elastic member 247, through hole 248, second reset elastic member 249. DETAILED DESCRIPTION

[0024] The present invention is further described below in conjunction with the accompanying drawings and embodiments.

[0025] The "left" and "right" in the present invention are relative positional relationships and should not be understood as limitations on specific directions.

[0026] like Figures 1 to 3As shown, a frequency adaptive shock absorber of the present invention comprises a cylinder 1, an oil storage chamber 3 and a piston 2 arranged in the inner chamber of the cylinder 1 and slidingly and sealingly matched with the inner chamber of the cylinder 1, wherein the piston 2 divides the inner chamber of the cylinder 1 into a rod chamber 11 and a rodless chamber 12, wherein the rod chamber 11 is provided with a piston rod 4 with one end extending to the outside of the cylinder 1 and the other end connected to the piston 2, wherein the piston 2 is provided with an extension valve 21 for allowing fluid to flow from the rod chamber 11 to the rodless chamber 12 in one direction, and a flow valve 22 for allowing fluid to flow from the rodless chamber 12 to the rod chamber 11 in one direction, and a damping structure for communicating with the oil storage chamber 3 to provide damping for fluid to enter and exit the oil storage chamber 3 is provided at the bottom of the rodless chamber 12. Specifically, the damping structure comprises a compression valve 6 for allowing fluid to flow from the rodless chamber 12 to the oil storage chamber 3 in one direction, and a compensation valve 5 for allowing fluid to flow from the oil storage chamber 3 to the rodless chamber 12 in one direction. The extension valve, compensation valve, flow valve and compression valve are all one-way valves. The above structure is the same as the existing shock absorber structure. The throttling effect of the flow valve and the compression valve on the oil makes the shock absorber produce a damping effect during compression movement. The throttling effect of the extension valve and the compensation valve on the oil makes the shock absorber produce a damping effect during compression movement. In some embodiments, the damping structure only uses small holes.

[0027] In order to improve the shock absorbing effect of the shock absorber on high-frequency vibration, the shock absorber of the present invention has a buffer chamber 24 on the piston 2, and a valve assembly 243 is provided in the buffer chamber 24 to divide the buffer chamber 24 into a left buffer chamber 241 and a right buffer chamber 242. One end of the valve assembly 243 is sealed with the buffer chamber 24, and the other end is also sealed with the buffer chamber 24. The buffer chamber 24 is provided with an oil outlet hole 231 arranged between the two ends of the valve assembly 243. The valve assembly 243 can move along the buffer chamber 24 to connect the left buffer chamber 241 with the oil outlet hole 231. The valve assembly 243 is provided with a first reset elastic member 247 for resetting the valve assembly 243. The pressure area of ​​the valve assembly 243 on the left buffer chamber 241 side is less than or equal to the pressure area on the right buffer chamber 242 side; the right buffer chamber 242 is provided with a A slider 244 slides and seals with the right buffer chamber 242, the slider 244 divides the right buffer chamber 242 into a left cavity 245 and a right cavity 246 and can slide in the direction close to the right cavity 246, the right cavity 246 is connected with the rodless cavity 12 through a through hole 248 at its end, so that liquid can enter and exit the right cavity when the slider moves, and a second reset elastic member 249 is provided on the slider 244 to enable the slider 244 to slide toward the left cavity 245; a high-frequency shock-absorbing channel 23 is provided in the piston 2, one end of which is connected with the rod cavity 11, the other end of the high-frequency shock-absorbing channel 23 is provided with a first liquid outlet channel 232 connected with the left buffer chamber 241, and a second liquid outlet channel 233 connected with the left cavity 245, the aperture of the second liquid outlet channel 233 is smaller than the apertures of the high-frequency shock-absorbing channel 23 and the first liquid outlet channel 232. In the present invention, the channel aperture is based on the minimum diameter of the channel. For example, if the minimum diameter of the high-frequency shock-absorbing channel is 10 mm, the diameter of the high-frequency shock-absorbing channel is based on 10 mm.

[0028] Since one end of the valve assembly 243 is sealed with the buffer chamber 24, and the other end is also sealed with the buffer chamber 24, the oil outlet hole 231 is arranged on the buffer chamber 24 and is located between the two ends of the valve assembly 243. In this way, it is difficult for the fluid in the left buffer chamber 241 and the right buffer chamber 242 to pass through the valve assembly 243 and enter the oil outlet hole 231, and the oil outlet hole 231 will be closed by the valve assembly 243.

[0029] When the vibration frequency to which the shock absorber is subjected is low, that is, when the vehicle is traveling on a normal road, the piston 2 moves back and forth at a slow speed, and the fluid flow rate per unit time between the rod chamber and the rodless chamber is low. When the shock absorber is extended, the fluid in the rod chamber 11 can enter the left chamber 245 through the high-frequency shock absorbing channel 23 and the second liquid outlet channel 233 in sequence, and push the slider 244 to slide toward the right chamber 246, thereby reducing the size of the right chamber 246 and deforming the second reset elastic member 249. At this time, although the fluid can also enter the left buffer chamber 241 through the high-frequency damping channel 23 and the first liquid outlet channel 232, the pressure area of ​​the valve assembly 243 on the left buffer chamber 241 side is less than or equal to the pressure area on the right buffer chamber 242 side and the fluid flow rate between the rod chamber and the rodless chamber is small, the flow rate of the fluid entering the left cavity 245 through the second liquid outlet channel 233 is small, and the pressure drop of the fluid after passing through the second liquid outlet channel 233 is small, and it is impossible to generate a sufficient pressure difference between the left buffer chamber 241 and the left cavity 245 to push the valve assembly 243 to move toward the right buffer chamber 242. At this time, the fluid pressure P1 in the left buffer chamber × the pressure area of ​​the valve assembly on the left buffer chamber side ≤ the fluid pressure P2 in the left cavity × the pressure area of ​​the valve assembly on the right buffer chamber side + the elastic force of the first reset elastic member, the valve assembly is subjected to the force in the direction of the left buffer chamber 241, the valve assembly does not move, and the oil outlet 231 remains in a closed state. At this time, the fluid flow in the rod chamber of the shock absorber is the same as that of the existing shock absorber: the volume of the upper chamber (rod chamber) decreases and the volume of the lower chamber (rodless chamber) increases, the extension valve on the piston opens, and the fluid in the upper chamber (rod chamber) enters the lower chamber (rodless chamber) through the extension valve. At the same time, a part of the oil opens the compensation valve and enters the lower chamber (rodless chamber) from the oil storage chamber.When the vibration frequency to which the shock absorber is subjected is high, that is, when the vehicle is traveling on a rough road, the reciprocating speed of the piston 2 becomes faster, the fluid flow rate per unit time between the rod chamber and the rodless chamber increases, and when the shock absorber is extended, the flow rate of the fluid entering the left cavity 245 through the second liquid outlet channel 233 becomes larger, and the fluid pressure drop increases. In this way, when the first liquid outlet channel and the pressure area parameters at both ends of the valve assembly 243 are designed, the aperture of the second liquid outlet channel 233 is reasonably set using the principle of fluid mechanics, so that when the vibration frequency to which the shock absorber is subjected reaches a certain frequency, that is, the required high frequency, the fluid pressure P1 in the left buffer cavity × the pressure area of ​​the valve assembly located on one side of the left buffer cavity > the fluid pressure P2 in the left cavity The pressure area of ​​the valve assembly on the right side of the buffer chamber + the elastic force of the first reset elastic member causes the valve assembly 243 to be subjected to a force moving toward the right buffer chamber 242, which can push the valve assembly 243 to move and deform the first reset elastic member 247, so that the valve assembly 243 opens the oil outlet 231, even if the left buffer chamber 241 is connected to the oil outlet 231, so that part of the fluid can enter the rodless chamber from the high-frequency shock absorbing channel, the first liquid outlet channel and the oil outlet, which is equivalent to adding a flow channel to the original product structure, thereby reducing the damping force of the shock absorber when subjected to high-frequency vibration, changing the original performance of the product, and improving the shock absorber's shock absorbing effect on the high-frequency vibration of the car, making the whole vehicle more comfortable. When the shock absorber is compressed, the slider 244 moves and resets toward the left cavity 245 under the action of the rodless chamber hydraulic force and the second reset elastic member 249. When the vehicle returns to a flat road, that is, when the vibration frequency of the shock absorber is reduced, the fluid flow rate per unit time between the rod chamber and the rodless chamber returns to its previous lower state. At this time, the fluid pressure P1 in the left buffer chamber × the pressure area of ​​the valve assembly on the left buffer chamber side ≤ the fluid pressure P2 in the left chamber × the pressure area of ​​the valve assembly on the right buffer chamber side + the elastic force of the first reset elastic member. The valve assembly is reset under the action of the first reset elastic member, and the oil outlet 231 is closed.

[0030] For the convenience of arrangement, it can be understood that the buffer chamber 24 is preferably arranged at the rodless chamber end of the piston.

[0031] In the present invention, preferably, the pressure area of ​​the valve assembly 243 on the left buffer chamber 241 is smaller than the pressure area on the right buffer chamber 242. This is conducive to opening the valve assembly 243 only when the shock absorber is subjected to higher frequency vibration, which can avoid the automobile chassis from being too soft.

[0032] The first resetting elastic member 247 and the second resetting elastic member 249 can be various springs. In the present invention, the first resetting elastic member 247 and the second resetting elastic member 249 are claw springs. The claw spring has the characteristic of occupying a small space, which can make the shock absorber structure more compact.

[0033] The cylinder 1 may adopt a single-layer cylinder structure, and the oil storage chamber 3 is arranged outside the cylinder. Figure 4 As shown, the cylinder 1 includes an outer cylinder 13 and an inner cylinder 14, the piston 2 is arranged in the inner cylinder 14, and slides and seals with the inner cavity of the inner cylinder 14, the outer cylinder 13 is sleeved on the inner cylinder 14, and a gap is provided between the side wall of the outer cylinder 13 and the side wall of the inner cylinder to form the oil storage cavity 3.

[0034] like Figure 2 and Figure 3 As shown, the present invention also provides a piston of the shock absorber mentioned above, wherein the piston 2 is provided with an extension valve 21 for allowing the fluid to flow from the rod chamber 11 to the rodless chamber 12 in one direction, and is also provided with a flow valve 22 for allowing the fluid to flow from the rodless chamber 12 to the rod chamber 11 in one direction, a buffer chamber 24 is provided at one end of the piston 2, and a valve assembly 243 is provided in the buffer chamber 24 for dividing the buffer chamber 24 into a left buffer chamber 2411 and a right buffer chamber 242, one end of the valve assembly 243 is sealed with the buffer chamber 24, and the other end is also sealed with the buffer chamber 24, an oil outlet hole 231 is provided on the buffer chamber 24 between the two ends of the valve assembly 243, the valve assembly 243 can move along the buffer chamber 24 to connect the left buffer chamber 241 with the oil outlet hole 231, a first reset elastic member 247 is provided on the valve assembly 243 to reset the valve assembly 243, and the valve assembly 243 is located at the pressure area on one side of the left buffer chamber 241 Smaller than the pressure area on one side of the right buffer chamber 242; a slider 244 is provided in the right buffer chamber 242, which slides and seals with the right buffer chamber 242, the slider 244 divides the right buffer chamber 242 into a left cavity 245 and a right cavity 246 and can slide toward the right cavity 246, the right cavity 246 is provided with a through hole 248 which can be communicated with the rodless cavity 12, so that liquid can enter and exit the right cavity when the slider moves, and a second reset elastic member 249 is provided on the slider 244 to enable the slider 244 to slide toward the left cavity 245; a high-frequency shock-absorbing channel 23 is provided at one end of the piston 2 for communicating with the rod cavity 11, the other end of the high-frequency shock-absorbing channel 23 is provided with a first liquid outlet channel 232 communicating with the left buffer chamber 241, and a second liquid outlet channel 233 communicating with the left cavity 245, the aperture of the second liquid outlet channel 233 is smaller than the apertures of the high-frequency shock-absorbing channel 23 and the first liquid outlet channel 232.

[0035] The present invention also provides a chassis system with good shock absorption effect, wherein the chassis system adopts the above-mentioned frequency adaptive shock absorber.

[0036] The present invention also provides a vehicle with good shock absorption effect, wherein the vehicle adopts the above chassis system.

Claims

1. A frequency adaptive shock absorber, comprising a cylinder (1), an oil storage chamber (3), and a piston (2) arranged in the inner chamber of the cylinder (1) and slidingly and sealingly matched with the inner chamber of the cylinder (1), wherein the piston (2) divides the inner chamber of the cylinder (1) into a rod chamber (11) and a rodless chamber (12), wherein the rod chamber (11) is provided with a piston rod (4) with one end extending outside the cylinder (1) and the other end connected to the piston (2), wherein the piston (2) is provided with an extension valve (21) for allowing a fluid to flow from the rod chamber (11) to the rodless chamber (12) in one direction, and a flow valve (22) for allowing a fluid to flow from the rodless chamber (12) to the rod chamber (11) in one direction, and wherein the bottom of the rodless chamber (12) is provided with a damping structure which is connected with the oil storage chamber (3) to provide damping for the fluid to enter and exit the oil storage chamber (3), and wherein the damping structure is characterized in that: It also includes a buffer chamber (24) arranged on the piston (2), wherein a valve assembly (243) is arranged in the buffer chamber (24) for dividing the buffer chamber (24) into a left buffer chamber (241) and a right buffer chamber (242), one end of the valve assembly (243) is in sealing cooperation with the buffer chamber (24), and the other end is also in sealing cooperation with the buffer chamber (24), the buffer chamber (24) is provided with an oil outlet hole (231) arranged between the two ends of the valve assembly (243), the valve assembly (243) can move along the buffer chamber (24) so ​​that the left buffer chamber (241) is connected to the oil outlet hole (231), the valve assembly (243) is provided with a first reset elastic member (247) for resetting the valve assembly (243), and the pressure area of ​​the valve assembly (243) located on the left buffer chamber (241) side is less than or equal to the pressure area of ​​the valve assembly (243) located on the right buffer chamber (242) side; The right buffer cavity (242) is provided with a slider (244) which slides and seals with the right buffer cavity (242); the slider (244) divides the right buffer cavity (242) into a left cavity (245) and a right cavity (246) and can slide toward the right cavity (246); the right cavity (246) is connected to the rodless cavity (12); the slider (244) is provided with a second reset elastic member (249) which enables the slider (244) to slide toward the left cavity (245); The piston (2) is provided with a high-frequency shock-absorbing channel (23) at one end of which is connected to the rod chamber (11); the other end of the high-frequency shock-absorbing channel (23) is provided with a first liquid outlet channel (232) connected to the left buffer chamber (241); and a second liquid outlet channel (233) connected to the left cavity (245); the aperture of the second liquid outlet channel (233) is smaller than the apertures of the high-frequency shock-absorbing channel (23) and the first liquid outlet channel (232).

2. The frequency adaptive shock absorber according to claim 1, characterized in that: The pressure-bearing area of ​​the valve assembly (243) located on the left buffer chamber (241) side is smaller than the pressure-bearing area of ​​the valve assembly (243) located on the right buffer chamber (242) side.

3. The frequency adaptive shock absorber according to claim 1, characterized in that: The first resetting elastic member (247) and the second resetting elastic member (249) are both claw springs.

4. The frequency adaptive shock absorber according to claim 1, characterized in that: The damping structure comprises a compression valve (6) for allowing fluid to flow in one direction from the rodless chamber (12) to the oil storage chamber (3) and a compensation valve (5) for allowing fluid to flow in one direction from the oil storage chamber (3) to the rodless chamber (12).

5. The frequency adaptive shock absorber according to claim 1, characterized in that: The cylinder (1) comprises an outer cylinder (13) and an inner cylinder (14); the piston (2) is arranged in the inner cylinder (14) and slides and seals with the inner cavity of the inner cylinder (14); the outer cylinder (13) is sleeved on the inner cylinder (14); a distance is provided between the side wall of the outer cylinder (13) and the side wall of the inner cylinder (14) to form the oil storage cavity (3).

6. A shock absorber piston, wherein the piston (2) is provided with an extension valve (21) for allowing a fluid to flow from a rod chamber (11) to a rodless chamber (12) in one direction, and a flow valve (22) for allowing a fluid to flow from a rodless chamber (12) to a rod chamber (11) in one direction, characterized in that: A buffer chamber (24) is provided at one end of the piston (2), and a valve assembly (243) is provided in the buffer chamber (24) for dividing the buffer chamber (24) into a left buffer chamber (241) and a right buffer chamber (242). One end of the valve assembly (243) is in sealing cooperation with the buffer chamber (24), and the other end is also in sealing cooperation with the buffer chamber (24). An oil outlet hole (231) is provided on the buffer chamber (24) between the two ends of the valve assembly (243). The valve assembly (243) can move along the buffer chamber (24) so ​​that the left buffer chamber (241) is connected to the oil outlet hole (231). A first reset elastic member (247) for resetting the valve assembly (243) is provided on the valve assembly (243). The pressure area of ​​the valve assembly (243) on the left buffer chamber (241) side is less than or equal to the pressure area on the right buffer chamber (242) side. The right buffer cavity (242) is provided with a slider (244) which slides and seals with the right buffer cavity (242); the slider (244) divides the right buffer cavity (242) into a left cavity (245) and a right cavity (246) and can slide toward the right cavity (246); the right cavity (246) is provided with a through hole (248) which can communicate with the rodless cavity (12); the slider (244) is provided with a second reset elastic member (249) which enables the slider (244) to slide toward the left cavity (245); The piston (2) is provided with a high-frequency shock-absorbing channel (23) at one end thereof being connected to the rod chamber (11); the other end of the high-frequency shock-absorbing channel (23) is provided with a first liquid outlet channel (232) connected to the left buffer chamber (241); and a second liquid outlet channel (233) connected to the left cavity (245); the aperture of the second liquid outlet channel (233) is smaller than the apertures of the high-frequency shock-absorbing channel (23) and the first liquid outlet channel (232).

7. The shock absorber piston according to claim 6, characterized in that: The pressure-bearing area of ​​the valve assembly (243) located on the left buffer chamber (241) side is smaller than the pressure-bearing area of ​​the valve assembly (243) located on the right buffer chamber (242) side.

8. The shock absorber piston according to claim 6, characterized in that: The first resetting elastic member (247) and the second resetting elastic member (249) are both claw springs.

9. Chassis system, characterized in that: The chassis system comprises a frequency adaptive shock absorber as claimed in any one of claims 1 to 5.

10. A vehicle, characterized in that: The vehicle includes the chassis system of claim 9.

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