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

Abstract

The utility model 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 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 utility model 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 known as dampers, are devices that accelerate the attenuation of vibrations between the vehicle frame and body, thereby improving the vehicle's ride comfort. Most shock absorbers are hydraulic. Their operating principle is that relative vibration between the vehicle frame and axle drives the piston inside the shock absorber up and down. Specifically, when the shock absorber is compressed, the piston moves downward, increasing the volume of the upper chamber and decreasing the volume of the lower chamber. The flow valve on the piston opens, allowing oil in the lower chamber to flow through the flow valve into the upper chamber. Simultaneously, some oil opens the bottom compression valve and enters the reservoir cylinder. When the shock absorber is extended, the piston moves upward, decreasing the volume of the upper chamber and increasing the volume of the lower chamber. The extension valve on the piston opens, allowing oil in the upper chamber to flow through the extension valve into the lower chamber. Simultaneously, some oil opens the compensating valve and enters the lower chamber from the reservoir cylinder. The throttling effect of the flow and compression valves on the oil creates damping during compression. The throttling effect of the extension and compensating valves on the oil creates damping during compression. The valve system characteristics of existing shock absorbers are only the relationship between force and speed. When a car is driving on high-frequency roads such as cobblestone roads, the shock absorber's shock absorption effect is poor, the vibration of the car will be very obvious, and driving comfort cannot be guaranteed. Utility Model Content

[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, so as to solve the problem of poor shock absorption effect of automobiles, especially 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 utility model 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 sliding 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, and the bottom of the rodless chamber is provided with a valve that is connected to the oil storage chamber to allow fluid to enter and exit the oil storage chamber The damping structure for providing damping further includes a buffer chamber provided on the piston, wherein a valve assembly is provided in the buffer chamber to separate 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 to reset the valve assembly, and a 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. The slider is provided with a second reset elastic member that enables 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 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. 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 distance 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 utility model also provides a shock absorber piston, wherein the piston is provided with an extension valve for allowing fluid to flow in one direction from a rod chamber to a rodless chamber, and is also provided with a flow valve for allowing fluid to flow in one direction from the rodless chamber to a rod chamber, a buffer chamber is provided at one end of the piston, a valve assembly for dividing the buffer chamber into a left buffer chamber and a right buffer chamber is provided in the 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 arranged between the two ends of the valve assembly is provided on the buffer chamber, 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 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;

[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, and 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. 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 utility model also provides a chassis system, which includes the above-mentioned frequency adaptive shock absorber.

[0017] The utility model also provides a vehicle, which includes 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 is greater than 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, 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 absorber's shock-absorbing effect on the high-frequency vibration of the car, and making the whole vehicle more comfortable. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 This is a schematic diagram of the structure of the shock absorber of the utility model;

[0020] Figure 2 This is a schematic diagram of the piston structure of the utility model;

[0021] Figure 3 This is a schematic diagram of the operating principle of the shock absorber of the utility model;

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

[0023] 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 absorption 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 will be further described below with reference to the accompanying drawings and embodiments.

[0025] The terms "left" and "right" in the present invention are relative positions and should not be construed as limitations on specific positions.

[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, the piston 2 divides the inner chamber of the cylinder 1 into a rod chamber 11 and a rodless chamber 12, 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, the piston 2 is provided with an extension valve 21 that allows 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 that allows fluid to flow from the rodless chamber 12 to the rod chamber 11 in one direction, and the bottom of the rodless chamber 12 is provided with a damping structure that is connected to the oil storage chamber 3 to provide damping for the fluid to enter and exit the oil storage chamber 3. Specifically, the damping structure includes a compression valve 6 that allows fluid to flow in one direction from the rodless chamber 12 to the oil storage chamber 3 and a compensation valve 5 that allows fluid to flow in one direction from the oil storage chamber 3 to the rodless chamber 12. The expansion valve, compensating valve, flow valve, and compression valve are all one-way valves. This structure is similar to that of existing shock absorbers. The throttling effect of the flow valve and compression valve on the oil creates damping during compression, while the throttling effect of the expansion valve and compensating valve on the oil creates damping during compression. In some embodiments, the damping structure utilizes only small orifices.

[0027] In order to improve the shock absorber's shock absorption effect on high-frequency vibration, the shock absorber of the utility model has a buffer chamber 24 on the piston 2, and a valve assembly 243 is provided in the buffer chamber 24 to separate 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 231 arranged between the two ends of the valve assembly 243. The valve assembly 243 can move along the buffer chamber 24 to communicate with the left buffer chamber 241 and the oil outlet 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 There is a slider 244 that 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 the through hole 248 at its end, so that liquid can enter and exit the right cavity when the slider moves. The slider 244 is provided with a second reset elastic member 249 that enables 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, and 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 aperture of the high-frequency shock-absorbing channel 23 and the first liquid outlet channel 232. The aperture of the channel in the present invention 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 set on the buffer chamber 24 and is located between the two ends of the valve assembly 243. In this way, the fluid in the left buffer chamber 241 and the right buffer chamber 242 is difficult 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 turn, 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 point, although fluid can also enter the left buffer chamber 241 through the high-frequency damping channel 23 and the first liquid outlet channel 232, because 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 fluid flow rate entering the left chamber 245 through the second liquid outlet channel 233 is low, and the pressure drop of the fluid after passing through the second liquid outlet channel 233 is small, which cannot generate a sufficient pressure differential between the left buffer chamber 241 and the left chamber 245 to push the valve assembly 243 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 is ≤ 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 return elastic member. The valve assembly is subjected to a force toward the left buffer chamber 241, and the valve assembly does not move, keeping the oil outlet 231 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 expansion valve on the piston opens, and the fluid in the upper chamber (rod chamber) enters the lower chamber (rodless chamber) through the expansion 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 increases, and the fluid pressure drop increases. In this way, when the parameters of the pressure area at both ends of the first liquid outlet channel and the valve assembly 243 are designed, the aperture of the second liquid outlet channel 233 is reasonably set using the principles of fluid mechanics. 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 is greater than the pressure area of the valve assembly on the left buffer cavity side, P2. The combined pressure area of the valve assembly on the right side of the buffer chamber and the elastic force of the first return elastic member cause the valve assembly 243 to be moved toward the right buffer chamber 242. This forces the valve assembly 243 to move and deforms the first return elastic member 247, causing the valve assembly 243 to open the oil outlet 231. This allows a portion of the fluid to enter the rodless chamber from the high-frequency damping channel, the first liquid outlet channel, and the oil outlet, even if the left buffer chamber 241 is connected to the oil outlet 231. This 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, improving the original performance of the product, and improving the shock absorber's damping effect on the vehicle's high-frequency vibration, thereby improving the comfort of the entire vehicle. When the shock absorber is compressed, the slider 244, under the action of the rodless chamber fluid force and the second return elastic member 249, moves and resets toward the left chamber 245. 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 the 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, the pressure area of the valve assembly 243 on the left buffer chamber 241 is preferably smaller than the pressure area on the right buffer chamber 242. This is beneficial for the shock absorber to open the valve assembly 243 only when subjected to higher frequency vibrations, thereby preventing the vehicle chassis from becoming too soft.

[0032] The first return elastic member 247 and the second return elastic member 249 can be various springs. In the present invention, the first return elastic member 247 and the second return elastic member 249 are both claw springs. Claw springs have the characteristic of taking up little space, which can make the shock absorber structure more compact.

[0033] The cylinder 1 can 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 chamber 3.

[0034] like Figure 2 and Figure 3 As shown, the utility model also provides a piston of the above-mentioned shock absorber, wherein the piston 2 is provided with an extension valve 21 that allows the fluid to flow in one direction from the rod chamber 11 to the rodless chamber 12, and is also provided with a circulation valve 22 that allows the fluid to flow in one direction from the rodless chamber 12 to the rod chamber 11. 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 to separate 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. The valve assembly 243 is located on 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, and 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, and the right cavity 246 is provided with a through hole 248 that can be communicated with the rodless cavity 12 so that liquid can pass in and out of 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, and 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, and the aperture of the second liquid outlet channel 233 is smaller than the aperture of the high-frequency shock-absorbing channel 23 and the first liquid outlet channel 232.

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

[0036] The utility model also provides a vehicle with good shock absorption effect, and 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 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 wherein the bottom of the rodless chamber (12) is provided with a damping structure 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: The piston (2) further comprises a buffer chamber (24) provided on the piston (2), wherein 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), wherein 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), wherein the buffer chamber (24) is provided with an oil outlet hole (231) provided between the two ends of the valve assembly (243), wherein the valve assembly (243) can move along the buffer chamber (24) to connect the left buffer chamber (241) with the oil outlet hole (231), wherein the valve assembly (243) is provided with a first reset elastic member (247) for resetting the valve assembly (243), and wherein 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; A slider (244) is provided in the right buffer cavity (242) and is slidably and sealably matched with the right buffer cavity (242). The slider (244) separates 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). A second resetting 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 in communication with the rod chamber (11); a first liquid outlet channel (232) in communication with the left buffer chamber (241) is provided at the other end of the high-frequency shock-absorbing channel (23); and a second liquid outlet channel (233) in communication with the left cavity (245) is also provided. 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, wherein: 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, wherein: 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, wherein: 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, wherein: 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 fluid to flow in one direction from the rod chamber (11) to the rodless chamber (12), and a flow valve (22) for allowing fluid to flow in one direction from the rodless chamber (12) to the rod chamber (11), 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) 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) for resetting the valve assembly (243). The pressure area of the valve assembly (243) on the left buffer chamber (241) is less than or equal to the pressure area on the right buffer chamber (242). A slider (244) is provided in the right buffer cavity (242) and is slidably and sealably matched with the right buffer cavity (242). The slider (244) separates 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) that can communicate with the rodless cavity (12). The slider (244) is provided with a second resetting elastic member (249) that 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 for communicating with the rod chamber (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).

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, wherein: The first resetting elastic member (247) and the second resetting elastic member (249) are both claw springs.

9. Chassis system, characterized by: The chassis system includes the frequency adaptive shock absorber according to any one of claims 1 to 5.

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

Images