Shock absorber, damping method and vehicle

Abstract

The application discloses a shock absorber, a shock absorbing method and a vehicle, and relates to the field of shock absorbing devices.The shock absorber comprises an oil storage cylinder;one end of a piston rod is inserted into the oil storage cylinder from an open end of the oil storage cylinder, and the side wall of the piston rod is sealed with the opening of the oil storage cylinder;an oil passing hole is arranged in the piston rod in the axial direction of the piston rod;the main piston valve system is movably arranged in the oil storage cylinder, and divides the oil storage cylinder into a first cavity and a second cavity;the main piston valve system is fixedly connected with one end of the piston rod in the oil storage cylinder;one end of a nitrogen cylinder is connected with the other end of the piston rod away from the oil storage cylinder through a connecting assembly, and the nitrogen cylinder is communicated with the oil passing hole;when the piston rod reciprocates in the oil storage cylinder in the axial direction of the piston rod, part of the oil in the oil storage cylinder can be transferred between the first cavity and the second cavity through the main piston valve system, and another part of the oil in the oil storage cylinder can be transferred between the first cavity and the nitrogen cylinder through the oil passing hole.The shock absorber, the shock absorbing method and the vehicle provided by the application can improve the heat dissipation efficiency.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of damping devices, in particular to a damper, a damping method and a vehicle. BACKGROUND

[0002] The damper is generally installed on the automobile, and the purpose is to accelerate the damping of the frame and the body vibration, so as to improve the driving smoothness of the automobile, and to suppress the impact of the road when passing through the uneven road, so as to improve the driving performance of the automobile.

[0003] The nitrogen damper is widely used due to the advantages of precise damping control and good stability. However, the nitrogen damper in the prior art is directly connected with the nitrogen cylinder and the connecting seat, or directly connected with the nitrogen cylinder and the oil storage cylinder, or directly connected with the nitrogen cylinder and the connecting seat / oil storage cylinder through the hydraulic oil pipe. The nitrogen cylinder and the piston rod have no direct structural connection device, and the force is mainly transmitted through the oil hydraulic pressure. The oil in the oil storage cylinder directly enters the nitrogen cylinder under pressure to transmit the force. The oil temperature of the damper has a great influence on the damping performance and the sealing assembly of the product. In the prior art, the oil is directly transferred between the oil storage cylinder and the nitrogen cylinder, the heat dissipation area of the oil is small, and the heat dissipation efficiency is low.

[0004] Therefore, it is urgent to design a technical scheme capable of improving the heat dissipation efficiency. SUMMARY

[0005] The purpose of the present application is to provide a damper, a damping method and a vehicle to solve the problems existing in the prior art and improve the heat dissipation efficiency.

[0006] To achieve the above purpose, the present application provides the following scheme:

[0007] The present application provides a damper, comprising:

[0008] An oil storage cylinder is used to store oil, and one end of the oil storage cylinder is open;

[0009] A piston rod is inserted into the oil storage cylinder from the open end of the oil storage cylinder, and the side wall of the piston rod and the opening of the oil storage cylinder are sealed; an oil passing hole is arranged in the piston rod along the axial direction of the piston rod;

[0010] A main piston valve system is movably arranged in the oil storage cylinder, and the oil storage cylinder is divided into a first cavity away from the opening and a second cavity close to the opening, and the main piston valve system is fixedly connected with one end of the piston rod in the oil storage cylinder;

[0011] A nitrogen cylinder is connected to the end of the piston rod away from the oil storage cylinder through a connecting assembly, and the nitrogen cylinder is in communication with the oil passage; when the piston rod reciprocates in the oil storage cylinder along the piston rod axial direction, part of the oil in the oil storage cylinder can be transferred between the first cavity and the second cavity through the main piston valve system, and another part of the oil in the oil storage cylinder can be transferred between the first cavity and the nitrogen cylinder through the oil passage.

[0012] Preferably, a sealing assembly is further included, which is fixedly sealed at the opening position of the oil storage cylinder, the piston rod passes through the sealing assembly, and the piston rod side wall is in contact with the sealing assembly; the cavity between the sealing assembly and the main piston valve system forms the second cavity, and the cavity at the end of the oil storage cylinder away from the opening forms the first cavity.

[0013] Preferably, a floating piston is movably arranged in the nitrogen cylinder, the outer side of the floating piston is in contact with the inner side wall of the nitrogen cylinder, and the floating piston divides the nitrogen cylinder into a nitrogen cavity and an oil cavity, the nitrogen cavity can be filled with nitrogen, and the oil cavity is in communication with the oil passage of the piston rod.

[0014] Preferably, the connecting assembly includes a first connecting seat, the first connecting seat is fixedly connected to the end of the piston rod away from the oil storage cylinder and the end of the nitrogen cylinder close to the oil cavity respectively, and the connecting assembly is provided with a communication assembly, which can communicate the oil passage of the piston rod with the oil cavity.

[0015] Preferably, the communication assembly includes a compression adjusting valve and a communication flow channel provided with the first connecting seat, one end of the communication flow channel is in communication with the oil cavity, the other end is in communication with the oil passage, the compression adjusting valve is arranged in the communication flow channel, a through hole is provided in the compression adjusting valve, the through hole can guide the communication flow channel, and the compression adjusting valve can adjust the aperture of the through hole.

[0016] Preferably, a rebound adjusting valve is arranged on the first connecting seat, rebound adjusting holes and oil inlet holes are provided on the main piston valve system, the rebound adjusting holes can unidirectionally communicate the oil in the oil passage to the first cavity, the rebound adjusting valve can adjust the aperture of the rebound adjusting holes; the oil inlet holes can unidirectionally communicate the oil in the first cavity to the oil passage.

[0017] Preferably, the rebound adjustment valve comprises an adjustment wheel, a spherical plunger, a plunger rod and a rebound conical core; the adjustment wheel is screwed into the inner threaded hole of the first connecting seat, one end of the adjustment wheel in the inner threaded hole is provided with a conical part, the diameter of the conical part gradually decreases from outside to inside, the plunger rod is slidingly connected in the oil passing hole of the piston rod, one end of the plunger rod is fixed with the spherical plunger, the end of the spherical plunger away from the plunger rod abuts against the side wall of the conical part, the other end of the plunger rod is connected with the rebound conical core, the side wall of the rebound conical core contacts with the orifice of the rebound adjustment hole close to the oil passing hole, the plunger rod can drive the rebound conical core to reciprocate along the piston rod in the axial direction, so as to adjust the size of the orifice of the rebound adjustment hole and the oil passing hole.

[0018] Preferably, the oil storage cylinder is fixed with the second connecting seat at the end away from the orifice, and the second connecting seat can be connected to the product to be damped.

[0019] The application also provides a damping method using the damper described above, and the damping method comprises the following steps:

[0020] When the damper is in the compression working condition, the piston rod drives the main piston valve system to move axially towards the end close to the oil storage cylinder, the oil pressure in the first cavity increases, part of the oil enters the second cavity through the main piston valve system, and the other part of the oil passes through the oil passing hole of the piston rod and enters the nitrogen cylinder through the compression adjustment valve to generate a compression damping force, and the floating piston compresses the nitrogen to compensate for the volume change of the piston rod in the oil storage cylinder in the compression working condition;

[0021] When the damper is in the stretching working condition, the piston rod drives the main piston valve system to move axially away from the oil storage cylinder, under the pressure of the nitrogen in the nitrogen cylinder, the oil in the oil cavity of the nitrogen cylinder passes through the one-way return port of the compression adjustment valve and enters the oil passing hole, and then passes through the rebound adjustment hole of the main piston valve system and enters the first cavity of the oil storage cylinder; the oil in the second cavity opens the one-way reset valve of the main piston valve system and enters the first cavity.

[0022] The application also provides a vehicle comprising a vehicle body, wherein the vehicle body is provided with the damper described above.

[0023] The application has the following technical effects compared with the prior art:

[0024] The oil hole is arranged in the piston rod, the nitrogen cylinder is communicated with the oil hole at the end of the piston rod away from the oil storage cylinder, when the shock absorber is compressed, a part of oil is transferred between the first cavity and the second cavity of the oil storage cylinder through the main piston valve system to provide damping force, another part of oil enters the nitrogen cylinder through the oil hole of the piston rod to compress the nitrogen in the nitrogen cylinder, the oil is divided into two parts to flow to different positions to provide damping force, the flow area of the oil is increased, compared with the traditional shock absorber, the heat dissipation area is increased, and the heat dissipation efficiency of the oil is improved; during the compression damping process of the shock absorber, the temperature of the oil under pressure is increased, and the high temperature of the oil of the shock absorber can cause damage to the damping performance and sealing performance of the equipment, therefore, the heat dissipation efficiency of the oil is improved, the problem of high temperature of the oil is avoided, and the damping performance and sealing performance of the equipment are improved. BRIEF DESCRIPTION OF DRAWINGS

[0025] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings needed to be used in the embodiments. Obviously, the drawings in the following description only some embodiments of the present application, and for those skilled in the art, other drawings can be obtained without creative labor.

[0026] Figure 1 The figure is a cross-sectional structure diagram of the shock absorber in one or some embodiments of the present application.

[0027] Figure 2 The figure is a structure diagram of the first connecting seat of the shock absorber in one or some embodiments of the present application.

[0028] Figure 3 The figure is a structure diagram of the main piston valve system of the shock absorber in one or some embodiments of the present application.

[0029] In the figure, 1 is a first connecting seat, 2 is a rebound adjustment valve, 3 is a piston rod, 4 is a sealing assembly, 5 is an oil storage cylinder, 6 is a main piston valve system, 7 is a second connecting seat, 8 is a compression adjustment valve, 9 is a floating piston, 10 is a nitrogen cylinder, 11 is a rebound adjustment hole, 12 is a top rod, and 13 is an oil hole. DETAILED DESCRIPTION

[0030] The technical solutions in the embodiments of the present application will be described clearly and completely below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only some embodiments of the present application, not all embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor are within the scope of protection of the present application.

[0031] The present application aims to provide a damper, a damping method and a vehicle to solve the problems of the prior art and improve heat dissipation efficiency.

[0032] In order to make the above-mentioned objectives, features and advantages of the present application more obvious and easy to understand, the present application will be further described in detail below with reference to the drawings and specific embodiments.

[0033] In the prior art, the nitrogen cylinder is directly connected with the oil storage cylinder, and then the oil in the oil storage cylinder is pressed into the nitrogen cylinder to achieve the damping effect. This arrangement of the nitrogen cylinder makes the nitrogen cylinder and the oil storage cylinder occupy a larger space, which is easy to cause the damper to be knocked. Moreover, the structure that the oil storage cylinder is directly connected with the nitrogen cylinder makes the cross-sectional area of the oil flow path in the oil storage cylinder smaller, and thus the heat dissipation efficiency of the oil is lower. In order to solve this problem, the present application provides a damper, which is referred to as Figure 1 , Figure 2 and Figure 3As shown, including the oil tank 5, the oil tank 5 is used to contain oil, and the oil tank 5 one end opening; The piston rod 3 one end from the opening end of the oil tank 5 into the oil tank 5, and the piston rod 3 side wall and the opening of the oil tank 5 contact seal; The piston rod 3 is provided with oil hole 13 along the axial direction of the piston rod 3; The main piston valve system 6 is movably arranged in the oil tank 5, which divides the oil tank 5 into a first cavity away from the opening and a second cavity close to the opening, and the main piston valve system 6 is fixedly connected with the one end of the piston rod 3 in the oil tank 5; The nitrogen tank 10 is connected with the one end of the piston rod 3 away from the oil tank 5 through the connecting assembly, and the nitrogen tank 10 is communicated with the oil hole 13; When the piston rod 3 reciprocates in the oil tank 5 along the axial direction of the piston rod 3, part of the oil in the oil tank 5 can be transferred between the first cavity and the second cavity through the main piston valve system 6, and another part of the oil in the oil tank 5 can be transferred between the first cavity and the nitrogen tank 10 through the oil hole 13. The oil hole 13 is arranged in the piston rod 3, the nitrogen tank 10 is communicated with the oil hole 13 away from the oil tank 5, so that when the shock absorber is compressed, part of the oil is transferred between the first cavity and the second cavity of the oil tank 5 through the main piston valve system 6 to provide damping force, and another part of the oil enters the nitrogen tank 10 through the oil hole 13 of the piston rod 3 to compress the nitrogen in the nitrogen tank 10. The oil is divided into two parts and flows to different positions to provide damping force, which increases the flow area of the oil, thereby increasing the heat dissipation area compared with the traditional shock absorber, and improving the heat dissipation efficiency of the oil. The piston rod 3 is designed as hollow, which not only meets the oil passing function under the stretching / compression condition of the shock absorber, but also plays a role in lightening. Because the temperature of the oil will rise during the compression of the shock absorber, the high temperature of the oil in the shock absorber will damage the damping performance and sealing performance of the equipment, so the present application improves the heat dissipation efficiency of the oil to avoid the problem of high temperature of the oil, thereby improving the damping performance and sealing performance of the equipment. In the prior art, the nitrogen tank 10 and the oil tank 5 are connected, and the piston rod 3 is located at the lower part of the oil tank 5, which is easy to be bumped, while the nitrogen tank 10 and the one end of the piston rod 3 away from the oil tank 5 are connected in the present application, and the piston rod 3 is placed at the upper part of the oil tank 5. The height of the sandstone splash is limited, which can prevent the sandstone from bumping and invading the piston rod 3, and enhance the overall stability and durability of the system.

[0034] In order to realize the sealing of the inside of the oil storage cylinder 5, while also ensuring that the piston rod 3 can move reciprocatingly along the axial direction, in an embodiment, a sealing assembly 4 is designed, which is fixedly sealed at the opening position of the oil storage cylinder 5, the piston rod 3 is arranged on the sealing assembly 4, and the side wall of the piston rod 3 is in contact with the sealing assembly 4 to seal, so that the piston rod 3 can move axially inside the sealing assembly 4, and the oil in the oil storage cylinder 5 will not leak during the movement; the structure of the sealing assembly 4 is not limited, and a sealing piston with a central opening can be used, or a sealing gasket or a sealing valve structure can be used, as long as it can realize the sealing of the opening of the oil storage cylinder 5, while also allowing the piston rod 3 to pass through; the sealing assembly 4 is connected with the oil storage cylinder 5, the piston rod 3 can perform axial stretching and compression on the sealing assembly 4, and the sealing assembly 4 and the oil storage cylinder 5 together provide a certain lateral support to the piston rod 3. The cavity between the sealing assembly 4 and the main piston valve system 6 forms a second cavity, the cavity between the main piston valve system 6 and the end of the oil storage cylinder 5 away from the opening forms a first cavity, the first cavity and the second cavity are separated by the main piston valve system 6, two one-way flow channels are provided on the main piston valve system 6, different direction valve pieces are provided on the flow channels, and under the action of a certain pressure, the valve pieces can open the corresponding flow channels; one of the flow channels cooperates with the valve piece to enable the oil in the first cavity to flow to the second cavity in one direction and cannot flow in the reverse direction, and the other flow channel cooperates with the valve piece to enable the oil in the second cavity to flow to the first cavity in one direction and cannot flow in the reverse direction; by adjusting the positions of the two valve pieces, the maximum opening cross-sectional area of the flow channel corresponding to the valve piece can be controlled, and then the flow of the oil between the first cavity and the second cavity can be controlled, so that the damping force of the shock absorber can be controlled.

[0035] In an embodiment, a floating piston 9 is movably arranged in the nitrogen cylinder 10, and a sealing ring is arranged on the outer wall of the floating piston 9 to enhance the sealing between the floating piston 9 and the nitrogen cylinder 10. The floating piston 9 divides the nitrogen cylinder 10 into a nitrogen cavity and an oil cavity, the nitrogen cavity is filled with nitrogen, and the oil cavity is in communication with the oil passage 13 of the piston rod 3; the end of the nitrogen cylinder 10 away from the oil passage 13 is provided with a gas nozzle cover to seal the nitrogen cavity. The gas nozzle cover can be fixed by a retaining ring, that is, a fixed clamping groove is arranged at the corresponding position of the gas nozzle cover and the nitrogen cylinder 10, the retaining ring is installed in the two fixed clamping grooves, and the fixing of the gas nozzle cover is realized. The opening of the gas nozzle cover can expose the gas nozzle at the bottom of the nitrogen cylinder 10, and then the filling of nitrogen in the nitrogen cylinder 10 can be realized. The structure of the gas nozzle is similar to that of the inflating port on the tire, which can one-way fill gas into the inside of the nitrogen cylinder 10, but the gas cannot flow out in the reverse direction, which is a mature structure.

[0036] In one embodiment, the connecting assembly comprises a first connecting seat 1, which is fixedly connected with one end of the piston rod 3 away from the oil storage cylinder 5 and one end of the nitrogen cylinder 10 close to the oil cavity, respectively, and is provided with a communication assembly inside, which can communicate the oil passing hole 13 of the piston rod 3 with the oil cavity. The communication assembly comprises a compression adjusting valve 8 and a communication flow channel provided on the first connecting seat 1, one end of the communication flow channel is communicated with the oil cavity, the other end is communicated with the oil passing hole 13, the compression adjusting valve 8 is arranged in the communication flow channel, a through hole is provided in the compression adjusting valve 8, the through hole can guide the communication flow channel, and the compression adjusting valve 8 can adjust the size of the through hole. The compression adjusting valve 8 belongs to the prior art, and the structure and method for adjusting the size of the hole and the size of the flow are mature technologies, so they are not described in detail.

[0037] In one embodiment, the first connecting seat 1 is provided with a rebound adjusting valve 2, the main piston valve system 6 is provided with a rebound adjusting hole 11 and an oil inlet hole, the rebound adjusting hole 11 can unidirectionally flow the oil in the oil passing hole 13 to the first cavity, and the rebound adjusting valve 2 can adjust the size of the rebound adjusting hole 11; the oil inlet hole can unidirectionally flow the oil in the first cavity to the oil passing hole 13. In one embodiment, the main piston valve system 6 can be provided with a hydraulic buffer piston device under compression working condition according to the product positioning needs, so as to further improve the damping force in the compression or stretching process of the piston rod 3. In this embodiment, the rebound adjusting valve comprises an adjusting wheel, a spherical plunger, a top rod 12 and a rebound conical core; the adjusting wheel is screw-connected in the internal threaded hole of the first connecting seat 1, one end of the adjusting wheel in the internal threaded hole is provided with a conical part, the diameter of the conical part gradually decreases from outside to inside, the top rod 12 is slidingly connected in the oil passing hole 13 of the piston rod 3, one end of the top rod 12 is fixedly provided with the spherical plunger, one end of the spherical plunger away from the top rod 12 abuts against the side wall of the conical part, the other end of the top rod 12 is connected with the rebound conical core, the side wall of the rebound conical core is in contact with the hole of the rebound adjusting hole 11 close to one end of the oil passing hole 13, and the top rod 12 can drive the rebound conical core to reciprocate along the axial direction of the piston rod 3, so as to adjust the size of the communication area between the hole of the rebound adjusting hole 11 and the oil passing hole 13.

[0038] In one embodiment, the second connecting seat 7 is fixedly arranged at one end of the oil storage cylinder 5 away from the oil inlet, and the second connecting seat 7 can be connected to the product to be damped.

[0039] The application also provides a damping method, which adopts the above damping device, and comprises the following steps:

[0040] When the shock absorber is in compression condition, the piston rod 3 drives the main piston valve system 6 to move axially close to the end of the oil storage cylinder 5, that is, the piston rod 3 is compressed, the oil pressure in the first cavity is increased, and part of the oil enters the second cavity through the main piston valve system 6; another part of the oil passes through the oil passage hole 13 of the piston rod 3 through the one-way flow channel at the bottom of the main piston valve system 6, enters the nitrogen cylinder 10 through the compression adjusting valve 8, generates a compression damping force, the floating piston 9 compresses the nitrogen, and compensates for the volume change of the piston rod in the oil storage cylinder under compression condition, as shown in Figure 3 Figure 3 The two arrows in the figure are the flow paths of the oil in the first cavity when the first cavity is compressed; the gear of the compression adjusting valve 8 can produce different pressure differences, and then different compression damping forces; the compression adjusting valve 8 is a mature existing structure and will not be described here; the volume intrusion of the piston rod 3 under compression condition is compensated by the compression of the nitrogen by the floating piston 9;

[0041] When the shock absorber is in tension condition, the piston rod 3 drives the main piston valve system 6 to move axially away from the end of the oil storage cylinder 5, that is, the piston rod 3 is stretched, and under the action of the pressure of the nitrogen in the nitrogen cylinder 10, the oil in the oil cavity in the nitrogen cylinder 10 passes through the one-way return port on the compression adjusting valve 8 to enter the oil passage hole 13, and then passes through the rebound adjusting hole 11 on the main piston valve system 6 to enter the first cavity of the oil storage cylinder 5; adjusting the gear of the rebound adjusting valve 2 can produce different pressure differences, and then different recovery damping forces; due to the stretching of the piston rod 3, the pressure in the second cavity formed by the main piston valve system 6 and the sealing assembly 4 increases, the oil in the second cavity opens the one-way flow channel for the main piston valve system 6 to return, so that the oil enters the first cavity formed by the main piston valve system 6 and the oil storage cylinder 5. Under high-speed tension / compression condition, the temperature of the oil in the shock absorber will rise, and the present application changes the position of the nitrogen cylinder 10, which on the one hand reduces the direct impact and wear of the piston rod 3 of the shock absorber, and on the other hand increases the oil flow area, thereby improving the heat dissipation efficiency of the shock absorber.

[0042] The present application also provides a vehicle comprising a vehicle body, wherein the vehicle body is provided with the above shock absorber, and the position of the nitrogen cylinder 10 is rearranged to reduce the direct impact and wear of the shock absorber, simultaneously improve the heat dissipation efficiency of the shock absorber, ensure the driving performance of the vehicle, and prolong the service life of the shock absorber.

[0043] The principles and implementation modes of the present application are described by applying specific examples in the present application; the above examples are only used to help understand the method of the present application and its core idea; at the same time, for those skilled in the art, according to the idea of the present application, the specific implementation mode and application range will be changed. In summary, the content of the present application should not be understood as a limitation of the present application.​

Claims

1. A vibration damper, characterized in that: include: An oil storage tank, which is used to hold oil, and one end of the oil storage tank is open; A piston rod, one end of which passes through the opening of the oil reservoir and is sealed between the side wall of the piston rod and the opening of the oil reservoir; an oil passage hole is provided in the piston rod along the axial direction of the piston rod. The main piston valve system is movably disposed inside the oil reservoir, dividing the oil reservoir into a first cavity away from the opening and a second cavity close to the opening, and the main piston valve system is fixedly connected to one end of the piston rod located inside the oil reservoir. A nitrogen cylinder has one end connected to the end of the piston rod away from the oil reservoir via a connecting assembly, and the nitrogen cylinder is in communication with the oil passage hole; when the piston rod reciprocates along the piston rod axis inside the oil reservoir, part of the oil in the oil reservoir can be transferred between the first and second chambers via the main piston valve system, and another part of the oil in the oil reservoir can be transferred between the first chamber and the nitrogen cylinder via the oil passage hole; A floating piston is movable inside the nitrogen cylinder. The outer side of the floating piston is in contact with and sealed to the inner wall of the nitrogen cylinder, and the floating piston divides the nitrogen cylinder into a nitrogen chamber and an oil chamber. Nitrogen gas can be introduced into the nitrogen chamber, and the oil chamber is connected to the oil passage hole of the piston rod. The connecting assembly includes a first connecting seat, which is fixedly connected to the end of the piston rod away from the oil reservoir and the end of the nitrogen cylinder near the oil chamber. The connecting assembly has a communicating component that can connect the oil passage hole of the piston rod to the oil chamber. The first connecting seat is provided with a rebound regulating valve. The main piston valve system has a rebound regulating hole and an oil inlet hole. The rebound regulating hole can allow the oil in the oil passage hole to flow unidirectionally into the first chamber, and the rebound regulating valve can adjust the... The spring-loaded regulating orifice has a diameter; the oil inlet allows oil in the first cavity to flow unidirectionally into the oil passage; the spring-loaded regulating valve includes an adjusting wheel, a spherical pin, a push rod, and a spring-loaded conical core; the adjusting wheel is threaded into the internal threaded hole of the first connecting seat, and one end of the adjusting wheel located in the internal threaded hole has a conical part, the diameter of which gradually decreases from the outside to the inside; the push rod is slidably connected to the oil passage of the piston rod, one end of the push rod is fixed with a spherical pin, the end of the spherical pin away from the push rod abuts against the side wall of the conical part, and the other end of the push rod is connected to a spring-loaded conical core; the side wall of the spring-loaded conical core contacts the orifice of the spring-loaded regulating orifice near the oil passage; the push rod can drive the spring-loaded conical core to reciprocate along the piston rod axial direction, thereby adjusting the size of the area connecting the orifice of the spring-loaded regulating orifice and the oil passage.

2. The vibration damper according to claim 1, characterized in that: It also includes a sealing assembly, which is fixedly and sealed at the opening of the oil reservoir. The piston rod passes through the sealing assembly, and the side wall of the piston rod contacts and seals with the sealing assembly. The cavity between the sealing assembly and the main piston valve system forms the second cavity, and the cavity between the main piston valve system and the end of the oil reservoir away from the opening forms the first cavity.

3. The vibration damper according to claim 1, characterized in that: The connecting component includes a compression regulating valve and a connecting flow channel provided on the first connecting seat. One end of the connecting flow channel is connected to the oil chamber, and the other end is connected to the oil passage. The compression regulating valve is located in the connecting flow channel and has a through hole. The through hole can conduct the connecting flow channel, and the compression regulating valve can adjust the diameter of the through hole.

4. The vibration damper according to claim 1, characterized in that: The oil reservoir is fixedly provided with a second connecting seat at the end away from the opening, and the second connecting seat can be connected to the product to be vibration damped.

5. A vibration reduction method, characterized in that: The vibration damper described in any one of claims 1 to 4 is used; the vibration damping method includes the following steps: When the shock absorber is under compression, the piston rod drives the main piston valve system to move axially towards the end closer to the oil reservoir. The oil pressure in the first chamber increases, and part of the oil enters the second chamber through the main piston valve system. The other part of the oil passes through the oil passage hole of the piston rod and enters the nitrogen cylinder through the compression regulating valve, generating compression damping force. The floating piston compresses nitrogen to compensate for the volume change of the piston rod in the oil reservoir under compression. When the shock absorber is under tension, the piston rod drives the main piston valve system to move axially away from the oil reservoir. Under the pressure of nitrogen inside the nitrogen cylinder, the oil in the oil chamber of the nitrogen cylinder passes through the one-way return port on the compression regulating valve and enters the oil passage hole, and then passes through the rebound regulating hole on the main piston valve system and enters the first chamber of the oil reservoir. The oil in the second chamber opens the one-way reset valve of the main piston valve system and enters the first chamber.

6. A vehicle, characterized in that: Includes a vehicle body, wherein the vehicle body is provided with a shock absorber as described in any one of claims 1 to 4.

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