Self-adaptive double-oil-way parallel shock absorber

Abstract

The self-adaptive double-oil-way parallel shock absorber comprises an oil storage cylinder, a working cylinder arranged in the oil storage cylinder and a piston assembly arranged in the working cylinder in a sliding mode, and a cavity in the working cylinder is divided into a rod cavity and a rodless cavity through the piston assembly; one side outside the oil storage cylinder is connected with a middle cylinder, a first chamber and a second chamber are arranged in the middle cylinder, the first chamber is communicated with the rodless cavity, and the second chamber is communicated with the rod cavity; two one-way mechanical valves are arranged at the middle cylinder; an electromagnetic valve assembly is further arranged at the middle cylinder, and the electromagnetic valve assembly is used for controlling whether the first cavity and the second cavity are communicated or not; when oil flows into the second cavity from the first cavity in a one-way mode or flows into the first cavity from the second cavity in a one-way mode, the action of the electromagnetic valve assembly is superior to that of a one-way mechanical valve at the moment, active and rapid switching between the communication state and the blocking state between the first cavity and the second cavity is achieved, and therefore the purpose of action decoupling of the one-way mechanical valve and the electromagnetic valve assembly is achieved. And the dynamic responsiveness and accuracy of damping regulation and control are improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of shock absorbers, in particular to a self-adaptive double-oil-path parallel shock absorber. BACKGROUND

[0002] In the field of shock absorber damping force control technology, the mainstream control scheme in the prior art mainly falls into two categories. One is an electromagnetic valve control scheme, that is, the compression damping force and the recovery damping force are regulated by means of an electromagnetic valve, and the independent regulation and control of the two types of damping forces are realized by changing the flow area of the shock oil flowing through the electromagnetic valve. The second is a mechanical valve control scheme, that is, a single mechanical valve is used to synchronously regulate and control the compression damping force and the recovery damping force. This scheme has the significant advantages of simple structure and low cost.

[0003] However, the existing electromagnetic valve control scheme has obvious technical defects: the regulation and control capability of a single electromagnetic valve is limited, and when the compression damping force and the recovery damping force are cooperatively regulated and controlled, coupling interference is easily generated, it is difficult to realize precise control of the two types of damping forces, and decoupling and independent precise regulation and control of the recovery damping force and the compression damping force cannot be achieved. At the same time, a single electromagnetic valve needs to be maintained in a high-frequency working state for a long time, which is extremely easy to affect the control precision due to excessive temperature rise, and in severe cases, the electromagnetic valve may even fail, thereby causing the shock absorber as a whole to be unable to normally operate.

[0004] In summary, how to realize decoupling of the control of the recovery damping force and the compression damping force to achieve precise regulation and control, and how the shock absorber can still operate after the electromagnetic valve fails, have become problems that researchers in the field urgently need to solve. SUMMARY

[0005] The technical problem to be solved by the present application is how to realize decoupling of the control of the recovery damping force and the compression damping force to achieve precise regulation and control, and how the shock absorber can still operate after the electromagnetic valve fails.

[0006] To solve the above technical problems, the technical scheme adopted by the present application is as follows:

[0007] The present application is a self-adaptive double-oil-path parallel shock absorber, comprising: an oil storage cylinder, a working cylinder arranged in the oil storage cylinder, a piston assembly slidingly arranged in the working cylinder, the piston assembly dividing a cavity in the working cylinder into a rod cavity and a rodless cavity.

[0008] An intermediate cylinder is connected to one side of the oil storage cylinder, a first cavity and a second cavity are arranged in the intermediate cylinder, the first cavity is in communication with the rodless cavity, and the second cavity is in communication with the rod cavity.

[0009] Two one-way mechanical valves are provided at the intermediate cylinder. One of the one-way mechanical valves is used to control whether the oil in the first chamber can flow into the second chamber in one direction, and the other one-way mechanical valve is used to control whether the oil in the second chamber can flow into the first chamber in one direction.

[0010] The intermediate cylinder is also equipped with a solenoid valve assembly, which is used to control whether the first chamber and the second chamber are connected.

[0011] Furthermore, the piston assembly includes: a piston body that slides within the working cylinder, one end of a piston rod passing through the oil reservoir and connected to the piston body, and the other end connected to the end cap;

[0012] A spring seat is fixed to the outside of the oil storage cylinder, and a first spring is provided between the spring seat and the end cover.

[0013] Furthermore, an anti-collision washer is provided on the portion of the piston rod located outside the oil reservoir.

[0014] Furthermore, the one-way mechanical valve includes: a valve body connected to the intermediate cylinder, an outlet on the side of the valve body communicating with the first chamber or the second chamber, and an inlet on the end face of the valve body communicating with the second chamber or the first chamber;

[0015] The valve body is provided with an adjusting nut and a sliding base that can close the inlet, and a second spring is provided between the sliding base and the adjusting nut.

[0016] Furthermore, the solenoid valve assembly includes: a housing, a first flow hole communicating with the first chamber is provided on the peripheral wall of the housing, and a second flow hole communicating with the second chamber is provided at the bottom of the housing;

[0017] A base is provided at the top of the housing, and a fixed seat is provided in the middle of the housing. A pilot cavity is formed between the fixed seat and the base. The first flow hole communicates with the pilot cavity through a flow channel opened on the fixed seat and the base.

[0018] The base is equipped with a solenoid valve at its top, and the output end of the solenoid valve is equipped with a liftable valve stem. The valve stem is used to determine whether to close the pilot chamber and the flow channel.

[0019] A sliding seat is provided inside the outer casing, and a main chamber is formed between the sliding seat and the fixed seat. The sliding seat and the fixed seat are connected by a third spring. The sliding seat is used to close the second flow hole.

[0020] The main chamber and the pilot chamber are connected by a pilot hole opened on the fixed seat.

[0021] Furthermore, the main chamber is connected to the second flow hole and the main chamber is connected to the first flow hole through a normally open hole on the sliding seat.

[0022] Furthermore, the valve stem and the fixed seat are connected by a fourth spring.

[0023] Furthermore, it also includes a gas cylinder assembly, the gas cylinder assembly comprising:

[0024] The bottle body has its mouth connected to either the first or second chamber. A floating piston is installed inside the bottle body to divide the interior of the bottle body into a compensation chamber and a compression chamber. The portion of the bottle body located in the compression chamber is sealed with an inflation nail.

[0025] The beneficial effects of this invention are as follows: This invention is an adaptive dual-oil-circuit parallel shock absorber. When the oil flows unidirectionally from the first chamber to the second chamber or unidirectionally from the second chamber to the first chamber, the solenoid valve assembly operates faster than the one-way mechanical valve, realizing the active and rapid switching between the connected and blocked states between the first and second chambers. This achieves the purpose of decoupling the actions of the one-way mechanical valve and the solenoid valve assembly, improving the dynamic response and accuracy of damping control. Attached Figure Description

[0026] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0027] Figure 1 This is a structural schematic diagram of this embodiment;

[0028] Figure 2 yes Figure 1 Enlarged view of point A in the middle;

[0029] Figure 3 yes Figure 1 Enlarged view at point B in the middle;

[0030] Figure 4 yes Figure 1 Enlarged view of point C in the middle. Detailed Implementation

[0031] The present invention will now be described in further detail with reference to the accompanying drawings. These drawings are simplified schematic diagrams, illustrating only the basic structure of the invention, and therefore only show the components relevant to the invention.

[0032] See Figure 1This embodiment is an adaptive dual-oil-circuit parallel shock absorber, including an oil reservoir 12, which is a closed structure with a piston rod 43 passing through its bottom; a working cylinder 13 is coaxially disposed inside the oil reservoir 12, which is a structure with a closed top and an open bottom; a piston assembly 40 is slidably disposed inside the working cylinder 13, dividing the working cylinder 13 into a rodless chamber 141 at the top and a rod chamber 142 at the bottom, wherein the rod chamber 142 is partially connected to the inner wall of the oil reservoir 12 and the outer wall of the working cylinder 13; an intermediate cylinder 18 is disposed on the right side of the top of the oil reservoir 12, and the intermediate cylinder 18 is provided with a first chamber 181 and a second chamber 182 arranged vertically parallel to each other. A first chamber 181 is connected to a rodless chamber 141, and a second chamber 182 is connected to the inner wall of the oil reservoir 12 and the outer wall of the working cylinder 13, i.e., connected to the rod chamber 142. The first chamber 181 and the second chamber 182 are connected by two one-way mechanical valves 20 and a solenoid valve assembly 30. The one-way mechanical valve 20 on the upper left controls whether the oil in the second chamber 181 can flow unidirectionally into the first chamber 181, and the one-way mechanical valve 20 on the lower right controls whether the oil in the first chamber 181 can flow unidirectionally into the second chamber 182. The solenoid valve assembly 30 is used to control whether the first chamber 181 can communicate with the second chamber 182.

[0033] In this embodiment, when the oil flows unidirectionally from the first chamber 181 to the second chamber 182 or unidirectionally from the second chamber 182 to the first chamber 181, the solenoid valve assembly 30 operates in a manner superior to the one-way mechanical valve 20. This enables active and rapid switching between the connected and blocked states between the first chamber 181 and the second chamber 182, thereby achieving the purpose of decoupling the actions of the one-way mechanical valve 20 and the solenoid valve assembly 30, and improving the dynamic responsiveness and accuracy of the damping control.

[0034] See Figure 1 In some possible embodiments, the piston assembly 40 includes a piston rod 43 and a piston body 44; the piston rod 43 is partially disposed inside the working cylinder 13; the piston body 44 is slidably disposed inside the working cylinder 13 and its inner cavity is divided into a rod chamber 142 and a rodless chamber 141.

[0035] Through the cooperation between the piston rod 43 and the working cylinder 13 and the separation effect of the piston body 44, the piston assembly 40 can reciprocate within the working cylinder 13. During the movement, the volume change between the rod chamber 142 and the rodless chamber 141 generates a pressure difference. One end of the piston rod 43 is connected to the end cover 17. A spring seat 151 is fixed outside the oil reservoir 12. A first spring 15 is provided between the spring seat 151 and the end cover 17. When the piston body 44 moves upward, the first spring 15 is in a compressed state. At this time, the first spring 15 acts on the end cover 17 to reset.

[0036] SeeFigure 1 In some possible embodiments, the portion of the piston rod 43 located outside the oil reservoir 12 is provided with an anti-collision washer 41;

[0037] In this embodiment, a collision protection washer 41 is provided to prevent a rigid collision between the end cap 17 and the bottom of the oil reservoir 12.

[0038] See Figure 2 In some possible embodiments, the one-way mechanical valve 20 includes: a valve body 215, the valve body 215 being connected to the intermediate cylinder 16, the valve body 215 having an outlet on its side communicating with the first chamber 181 or the second chamber 182, and the valve body 215 having an inlet on its end face communicating with the second chamber 182 or the first chamber 181.

[0039] The valve body 215 is provided with an adjusting nut 212 and a sliding base 213 that can close the inlet. A second spring 214 is provided between the sliding base 213 and the adjusting nut 212.

[0040] In this embodiment, the two one-way mechanical valves 20 have the same structure. Taking the one-way mechanical valve 20 on the upper left as an example, the one-way mechanical valve includes an adjusting nut 212, a valve body 215, a second spring 214 and a sliding base 213.

[0041] The inlet of valve body 215 is connected to the second chamber 182, and the outlet of valve body 215 is connected to the first chamber 181. By setting the adjusting nut 212, the flow height of the sliding base 213 is controlled, the restoring damping force is changed, and the solenoid valve assembly 30 is assisted in connecting or blocking the first chamber 181 and the second chamber 182. The second spring 214 is located inside the restoring valve body 215. One end of the second spring 214 is connected to the adjusting nut 212, and the other end is connected to the base 213. Under the elastic force of the second spring 214, the base 213 tends to block the first chamber 181 and the second chamber 182.

[0042] See Figure 3In some possible embodiments, the solenoid valve assembly 30 includes: a housing 35, on the peripheral wall of which a first flow hole 341 communicating with the first chamber 181 is provided, and at the bottom of the housing 35 a second flow hole 342 communicating with the second chamber 181 is provided; a base 31 is provided at the top of the housing 35, and a fixed seat 331 is provided in the middle of the housing 31, forming a pilot cavity 312 between the fixed seat 331 and the base 31; the first flow hole 341 communicates with the pilot cavity 312 through a flow channel 343 provided on the fixed seat 331 and the base 31; a solenoid valve 321 is provided at the top of the base 31, and a liftable valve stem 322 is provided at the output end of the solenoid valve 321. 322 is used to determine whether to close the pilot cavity 312 and the flow channel 343; a sliding seat 335 is vertically mounted inside the outer shell 35, forming a main chamber 336 between the sliding seat 335 and the fixed seat 331, and the sliding seat 335 and the fixed seat 331 are connected by a third spring 332, the sliding seat 335 is used to close the second flow hole 342; the main chamber 336 and the pilot cavity 312 are connected through a pilot hole 344 opened on the fixed seat 31; the main chamber 336 and the second flow hole 342 and the main chamber 336 and the first flow hole 341 are connected through a normally open hole 345 opened on the sliding seat 335; the valve stem 332 and the fixed seat 31 are connected by a fourth spring 311;

[0043] In this embodiment, one end of the valve stem 322 is connected to the solenoid valve 321, the base 31 is connected to the solenoid valve 321, and together with the fixed seat 331, forms a pilot cavity 312; the pilot cavity 312 is connected to the first chamber 181 through a first flow hole and a flow channel; a main chamber 336 is formed between the fixed seat 331 and the sliding seat 335; the main chamber 336 is connected to the pilot cavity 312 through a pilot hole, and is connected to the first chamber 181 and the second chamber 182 through normally open holes respectively.

[0044] The third spring 332 is located in the main chamber 336 and is connected to the sliding seat 335; under the elastic force of the third spring 332, the sliding seat 335 tends to block the first chamber 181 and the second chamber 182.

[0045] By employing the solenoid valve assembly 30 and combining it with the drive of the third spring 332, the position of the sliding seat 335 can be precisely positioned when the shock absorber is stationary, ensuring that the initial position of the sliding seat 335 is accurate before the damping force is adjusted. This facilitates the precise control of the recovery damping force and the compression damping force, and improves the dynamic response speed of the shock absorber's damping force adjustment.

[0046] The solenoid valve 321 controls the valve stem 322 to open or close the connection between the pilot chamber 312 and the first chamber 181, thereby changing the oil pressure between the pilot chamber 312 and the main chamber 336, and then drives the sliding seat 335 to open or close the connection between the first chamber 181 and the second chamber 182 in priority to the one-way mechanical valve 20.

[0047] Specifically, when the oil enters the main chamber 336 from the second chamber 182, the sliding seat 335 needs to overcome the elastic force of the third spring 332 and the oil pressure in the main chamber 336. At this time, the solenoid valve 321 controls the valve stem 322 to connect the pilot chamber 312 and the first chamber 181 to reduce the oil pressure in the main chamber 336, so that the sliding seat 335 connects the second chamber 182 and the first chamber 181 before the one-way mechanical valve 20.

[0048] When the oil enters the main chamber 336 from the first chamber 181, it also needs to overcome the aforementioned resistance. At this time, the solenoid valve 321 controls the valve stem 322 to isolate the pilot chamber 312 from the first chamber 181, thereby reducing the oil pressure in the main chamber 336 and allowing the sliding seat 335 to connect the first chamber 181 to the second chamber 182 before the one-way mechanical valve 20.

[0049] In this manner, the solenoid valve assembly 30 can control the sliding seat 335 to act preferentially over the one-way mechanical valve 20, thereby enabling active and rapid switching between the connected and blocked states between the first chamber 181 and the second chamber 182. This achieves the purpose of decoupling the actions of the mechanical valve and the solenoid valve, improving the dynamic responsiveness and accuracy of damping control.

[0050] Furthermore, one end of the fourth spring 311 is connected to the valve stem 322, and the other end is connected to the fixed seat 331; one end of the third spring 332 is connected to the fixed seat 331, and the other end is connected to the sliding seat 335.

[0051] In the natural state of the fourth spring 311, its elastic force keeps the valve stem 322 in a fixed position; in the natural state of the third spring 332, its elastic force keeps the sliding seat 335 in a fixed position. This double reset spring structure provides stable initial conditions for the position change and precise control of the valve stem 322 and the sliding seat 335 under oil pressure, thereby ensuring the stability and accuracy of the operation of the solenoid valve assembly 30.

[0052] Furthermore, the bottom diameter of the sliding seat 335 is larger than the diameter of the second flow hole; this size design ensures that, in its natural state, the sliding seat 335 can effectively block the first chamber 181 and the second chamber 182, reducing the possibility of accidental connection between the two chambers, thereby ensuring precise decoupling and independent control of the restoring damping force and the compressive damping force. When the shock absorber is stationary and stable, the third spring 332 is in its natural state, at which point the sliding seat 335 completely blocks the first chamber 181 and the second chamber 182.

[0053] Furthermore, the top diameter of the valve stem is larger than the end diameter of the flow channel; this size design ensures that, under natural conditions, the valve stem 322 can effectively block the pilot chamber 312 from the main chamber 336, reducing the possibility of accidental connection between the two chambers, thereby ensuring precise decoupling of electromagnetic force and realizing independent control of the hydraulic force of the pilot chamber.

[0054] Furthermore, one end of the fourth spring 311 is fixed to the mounting base 331. When the shock absorber is installed in the vehicle, the mounting base 331 is located below the base 31; gravity makes this fixed state more stable and less prone to displacement or loosening; this stable fixing method ensures that the fourth spring 311 can continuously and stably provide elastic force to the valve stem 322, so that it can reliably maintain the tendency to connect or block the pilot chamber 312 and the main chamber 336, thereby ensuring the positioning stability of the valve stem 322 before damping force adjustment.

[0055] Furthermore, one end of the third spring 332 is fixed to the fixed seat 331. When the shock absorber is installed in the vehicle, the sliding seat 335 is located below the fixed seat 331; gravity also enhances the stability of this fixed state. This structure ensures that the third spring 332 can continuously and stably provide elastic force to the sliding seat 335, reliably maintaining the tendency to connect or block the first chamber 181 and the second chamber 182, thereby ensuring the positioning stability of the sliding seat 335 before damping force adjustment.

[0056] Furthermore, the third spring 332 and the fourth spring 311 are a composite spring. This composite spring has the characteristics of good corrosion resistance, long service life, and strong vibration damping ability. Moreover, it does not produce sparks when colliding with metal, making it suitable for flammable and explosive working environments, and better meeting the requirements for shock absorber use.

[0057] See Figure 4 In some possible embodiments, a gas cylinder assembly 50 is also included, the gas cylinder assembly 50 comprising:

[0058] Bottle body 51, the bottle mouth of the bottle body 51 is connected to the first chamber 181 or the second chamber 182, a floating piston 52 is provided inside the bottle body 51 to divide the inside of the bottle body 51 into a compensation chamber 523 and a compression chamber 522, and an inflation nail 53 is sealed on the part of the bottle body 51 located in the compression chamber 522.

[0059] In this embodiment, after being pressurized, the compression chamber 522 can position the floating piston 52 in the middle of the gas cylinder 51; the compensation chamber 523 is connected to the second chamber 182 and is used for oil storage and compensation; when the piston body 44 moves to the rodless chamber 141, the oil pressure in the first chamber 181 increases, pushing the floating piston 52 to sink and compressing the compensation chamber 523 to achieve volume compensation.

[0060] When the piston body 44 moves toward the rod chamber 142, the oil pressure in the first chamber 181 decreases, the floating piston 52 floats up, and the compensation chamber 523 is released to achieve volume compensation.

[0061] In summary, when the sliding piston 44 moves toward the rodless chamber 141, the oil in the rodless chamber 141 enters the first chamber 181 and flows to the second chamber 182 under the control of the solenoid valve assembly 30, which takes precedence over the one-way mechanical valve 20. In the second chamber 182, part of the oil enters the gas cylinder assembly 50, and the other part flows to the rod chamber 142.

[0062] When the sliding piston 44 moves toward the rod chamber 142, the oil in the rod chamber 142 enters the second chamber 182 and flows to the first chamber 181 under the control of the solenoid valve assembly 30, which takes precedence over the one-way mechanical valve 20. At the same time, the gas cylinder assembly 50 releases oil into the second chamber 182, and the oil in the first chamber 181 flows to the rodless chamber 141.

[0063] When the solenoid valve assembly 30 is in a malfunctioning state, the oil pressure in the pilot chamber 312 is always higher than that in the main chamber 336, and only a very small amount of oil flows through the solenoid valve assembly 30.

[0064] When the sliding piston 44 moves toward the rodless chamber 141, the oil in the compression chamber 141 enters the first chamber 181; by adjusting the adjusting nut 221, the flow height of the base 222 can be controlled, thereby adjusting the flow rate of the oil from the first chamber 182 to the second chamber 181 to change the compression damping force.

[0065] When the sliding piston 44 moves toward the rod chamber 142, the oil in the rod chamber 142 enters the second chamber 182; by adjusting the adjusting nut 212, the flow height of the base 213 can be controlled, thereby adjusting the flow rate of the oil from the second chamber 182 to the first chamber 181 to change the restoring damping force.

[0066] It should be noted that the solenoid valve 321 controls the valve stem 322 to move downwards. The reset is achieved by the action of the fourth spring 311. When the solenoid valve 321 fails, it is in a high position. The pilot chamber 312 and the flow channel 343 are closed by the valve stem 322. In other words, the solenoid valve 321 achieves the downward movement of the valve stem 322 by increasing the current. The greater the distance between the pilot chamber 312 and the flow channel 343, the smaller the damping. It is an inverse proportional constant solenoid valve.

[0067] Based on the above-described preferred embodiments of the present invention, and through the foregoing description, those skilled in the art can make various changes and modifications without departing from the inventive concept. The technical scope of this invention is not limited to the contents of the specification, but must be determined according to the scope of the claims.

Claims

1. A self-adapting dual-oil-path parallel type shock absorber, characterized by, The utility model relates to a kind of hydraulic cylinder, including: Oil tank, working cylinder arranged in the oil tank, piston assembly slidingly arranged in the working cylinder, the piston assembly divides the chamber in working cylinder into rod cavity, rodless cavity; Intermediate cylinder is connected to the outside of the oil tank, first chamber and second chamber are arranged in the intermediate cylinder, the first chamber is communicated with the rodless cavity, the second chamber is communicated with the rod cavity; Two one-way mechanical valves are arranged at the intermediate cylinder, one of the one-way mechanical valves is used to control whether the oil in the first chamber can flow into the second chamber, and the other one-way mechanical valve is used to control whether the oil in the second chamber can flow into the first chamber; Electromagnetic valve assembly is further arranged at the intermediate cylinder, and the electromagnetic valve assembly is used to control whether the first chamber and the second chamber are communicated.

2. The self-adaptive dual-oil-path parallel shock absorber according to claim 1, characterized in that, The piston assembly includes a piston body slidingly located in the working cylinder, a piston rod having one end connected to the piston body through the oil tank and the other end connected to the end cover. A spring seat is fixed to the outside of the oil tank, and a first spring is arranged between the spring seat and the end cover.

3. The self-adaptive dual-oil-path parallel shock absorber according to claim 2, characterized in that, A collision pad is arranged on the part of the piston rod outside the oil tank.

4. The self-adaptive dual-oil-path parallel shock absorber according to claim 1, characterized in that, The one-way mechanical valve includes a valve body connected to the intermediate cylinder, an outlet is formed in the side of the valve body and communicated with the first chamber or the second chamber, and an inlet is formed in the end face of the valve body and communicated with the second chamber or the first chamber. An adjusting nut is arranged in the valve body, and a sliding base capable of closing the inlet is arranged between the adjusting nut and the sliding base.

5. The self-adaptive dual-oil-path parallel shock absorber according to claim 1, wherein The electromagnetic valve assembly includes a housing, a first flow passage is formed in the peripheral wall of the housing and communicated with the first chamber, and a second flow passage is formed in the bottom of the housing and communicated with the second chamber. A base is arranged at the top of the housing, a fixing seat is arranged in the middle of the housing, a pilot chamber is formed between the fixing seat and the base, the first flow passage is communicated with the pilot chamber through a flow passage formed in the fixing seat and the base. An electromagnetic valve is arranged on the top of the base, and a valve rod capable of lifting is arranged on the output end of the electromagnetic valve, and the valve rod is used to close the pilot chamber and the flow passage. A sliding seat is arranged in the housing and capable of lifting, a main chamber is formed between the sliding seat and the fixing seat, the sliding seat and the fixing seat are connected through a third spring, and the sliding seat is used to close the second flow passage. The main chamber and the pilot chamber are communicated through a pilot hole formed in the fixing seat.

6. The self-adaptive dual-oil-path parallel shock absorber according to claim 5, characterized by, The main chamber and the second flow passage and the main chamber and the first flow passage are communicated through a constant hole formed in the sliding seat.

7. The self-adaptive dual-oil-path parallel shock absorber according to claim 5, wherein The valve rod and the fixing seat are connected through a fourth spring.

8. The self-adaptive dual-oil-path parallel shock absorber according to claim 1, wherein, The utility model further includes a gas cylinder assembly, and the gas cylinder assembly includes: A bottle body, a bottle opening of the bottle body is communicated with the first chamber or the second chamber, a floating piston is arranged in the bottle body to divide the bottle body into a compensation chamber and a compression chamber, and the part of the bottle body located at the compression chamber is sealed and provided with an inflation nail.

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