Nitrogen shock absorber and shock absorption method thereof

Abstract

The invention discloses a nitrogen shock absorber and a shock absorption method thereof, and relates to the technical field of shock absorbers, the nitrogen shock absorber comprises an oil storage barrel, a piston rod, a lower connecting seat, an upper connecting seat, a central fixing pipe, a piston valve system assembly and a compression hydraulic buffer assembly; the piston rod is slidably connected with the oil reservoir; the lower connecting seat is fixed at one end of the piston rod; the upper connecting seat is mounted at one end of the oil storage cylinder, and a compression hydraulic buffer regulating valve system assembly, a compression high-low speed regulating valve system assembly and a nitrogen cylinder are mounted on the upper connecting seat; the center fixing pipe is fixed to the end, located in the oil storage barrel, of the piston rod. The piston valve system assembly is fixed to the outer wall of the center fixing pipe and divides the interior of the oil storage barrel into a recovery cavity and a compression cavity. The compression hydraulic buffering assembly comprises a hydraulic buffering rod, and the hydraulic buffering rod is communicated with the compression hydraulic buffering adjusting valve system assembly. The performance of the compression hydraulic buffering system is improved, the hydraulic buffering stroke is increased, and the purpose of progressive damping hydraulic buffering is achieved.

Description

Technical Field

[0001] The present invention relates to the technical field of shock absorbers, and in particular to a nitrogen shock absorber and a shock absorption method thereof. Background Art

[0002] The compression hydraulic buffer structure of the nitrogen shock absorber known to the inventor is generally to add a buffer piston to the upper end of the main piston valve system. When the nitrogen shock absorber is in the limit compression stroke, the buffer piston enters the hydraulic buffer sleeve and forms a sealed cavity with the hydraulic buffer sleeve to achieve a hydraulic buffer effect. The compression change curve is controlled by the distance and size of the openings on the side of the hydraulic buffer sleeve to meet actual usage requirements.

[0003] Although the compression hydraulic buffer structure of the nitrogen shock absorber can achieve the hydraulic buffer effect within a shorter stroke at the compression limit, the damping force value of this structure suddenly increases within the shorter stroke, causing discomfort to the driver. It also has the disadvantage of insufficient buffer stroke.

[0004] Therefore, there is an urgent need in the art for a nitrogen shock absorber and a shock absorption method thereof to solve the above-mentioned problems. Summary of the invention

[0005] The purpose of the present invention is to provide a nitrogen shock absorber and a vibration reduction method thereof, so as to solve the problems existing in the above-mentioned prior art, improve the performance of the compression hydraulic buffer system, increase the hydraulic buffer stroke, achieve the purpose of progressive damping hydraulic buffering, and thus reduce the discomfort of the driver.

[0006] To achieve the above object, the present invention provides the following solutions:

[0007] The invention discloses a nitrogen shock absorber, comprising: an oil storage cylinder, a piston rod, a lower connecting seat, an upper connecting seat, a central fixing pipe, a piston valve system component and a compression hydraulic buffer component; the oil storage cylinder is filled with hydraulic oil; the piston rod is slidably connected to the oil storage cylinder, one end of the piston rod is located inside the oil storage cylinder, and the other end of the piston rod is located outside the oil storage cylinder; the lower connecting seat is fixed to an end of the piston rod located outside the oil storage cylinder; the upper connecting seat is installed at an end of the oil storage cylinder away from the lower connecting seat, and a compression hydraulic buffer regulating valve system component, a compression high and low speed regulating valve system component and a nitrogen cylinder are installed on the upper connecting seat, the compression hydraulic buffer regulating valve system component is connected with the compression high and low speed regulating valve system component, the compression high and low speed regulating valve system component is connected with the nitrogen cylinder, and the compression high and low speed regulating valve system component is also connected with the interior of the oil storage cylinder; the central fixing pipe is fixed to the piston rod at the position where On one end of the oil storage cylinder, a plurality of center tube first oil holes are provided on the side wall of the end of the center fixed tube close to the piston rod; the piston valve system assembly is fixed on the outer wall of the center fixed tube, and the piston valve system assembly divides the oil storage cylinder into a recovery chamber and a compression chamber. The side of the piston valve system assembly close to the lower connecting seat is the recovery chamber, and the side of the piston valve system assembly close to the upper connecting seat is the compression chamber. The piston valve system assembly includes a main piston and a buffer piston. The main piston is provided with a plurality of first piston through holes, and the buffer piston is provided with a plurality of second piston through holes. The side wall of the center fixed tube is also circumferentially evenly provided with a plurality of center tube second oil holes, and the center tube second oil holes are located between the main piston and the buffer piston; the compression hydraulic buffer assembly includes a hydraulic buffer rod, which is arranged in the compression chamber, and the hydraulic buffer rod is connected to the compression hydraulic buffer regulating valve system assembly.

[0008] In an exemplary embodiment, the piston valve system assembly further includes a rebound buffer piston and a compression buffer piston, the rebound buffer piston being located on a side of the main piston away from the buffer piston, and the compression buffer piston being located on a side of the buffer piston away from the main piston; a guide is installed at one end of the oil storage cylinder close to the lower connecting seat, and a plurality of first oil pressure regulating through holes are provided on the side wall of the guide, and when the piston valve system assembly moves toward the guide, the rebound buffer piston can be inserted into the guide; the compression hydraulic buffer assembly further includes a hydraulic buffer sleeve, which is installed at one end of the oil storage cylinder close to the upper connecting seat, and a plurality of second oil pressure regulating through holes are provided on the side wall of the hydraulic buffer sleeve, and when the piston valve system assembly moves toward the hydraulic buffer sleeve, the compression buffer piston can be inserted into the hydraulic buffer sleeve.

[0009] In an exemplary embodiment, the hydraulic buffer sleeve is threadedly connected to the outer side of the hydraulic buffer rod, a clamped protrusion is provided on the outer wall of the hydraulic buffer sleeve, the oil storage cylinder and the upper connecting seat are threadedly connected, and the clamped protrusion can be clamped between the oil storage cylinder and the upper connecting seat.

[0010] In an exemplary embodiment, a first guide slot is provided on the outer wall of the guide, and a second guide slot is provided on the inner wall of the oil storage cylinder. The first guide slot and the second guide slot are directly opposite to each other, and a first retaining spring is commonly engaged in the first guide slot and the second guide slot.

[0011] In an exemplary embodiment, it also includes a rebound adjustment component, which includes an adjustment wheel, a spherical ejector pin, a ejector rod, a rebound conical core and a fastening plug, the adjustment wheel is threadedly connected to the lower connecting seat, the adjustment wheel has a conical portion, the ejector rod is slidably connected to the piston center channel of the piston rod, the spherical ejector pin is fixed to one end of the ejector rod, the end of the spherical ejector pin away from the ejector rod abuts against the conical portion, one end of the ejector rod abuts against the conical portion, the other end of the ejector rod is connected to the rebound conical core, the fastening plug is installed in the central fixed tube, and the first oil hole of the central tube is provided between the rebound conical core and the fastening plug.

[0012] In an exemplary embodiment, the compression hydraulic buffer regulating valve system assembly includes a buffer compression valve system, a buffer adjusting core and a buffer threaded positioning seat. The buffer compression valve system is fixed on the lower end outer wall of the buffer threaded positioning seat. The buffer compression valve system is provided with a first buffer compression valve piston through hole, and the first buffer compression valve piston through hole is connected to a first valve plate. The central channel of the buffer threaded positioning seat is provided with a first adjusting core through hole, and the upper end of the first adjusting core through hole is also threadedly connected to the buffer adjusting core, and the side wall of the buffer threaded positioning seat is provided with a first adjusting core oil through hole.

[0013] In an exemplary embodiment, the compression high and low speed regulating valve system assembly includes a high and low speed compression valve system, a spring, a low speed regulating core, a high and low speed regulating threaded positioning seat and a high speed regulating wheel. The high and low speed compression valve system is installed at the lower end of the high and low speed regulating threaded positioning seat. The high and low speed compression valve system is provided with a second high and low speed compression valve piston through hole, and the second high and low speed compression valve piston through hole is connected to a second valve plate. The high speed regulating wheel is installed at the center of the high and low speed regulating threaded positioning seat, the spring is provided between the second valve plate and the high speed regulating wheel, the central channel of the high speed regulating wheel is provided with a second regulating core through hole, the upper end of the second regulating core through hole is also threadedly connected to the low speed regulating core, and the side wall of the high speed regulating wheel is provided with a second regulating core oil through hole.

[0014] In an exemplary embodiment, a floating piston is slidably connected in the nitrogen cylinder, and the floating piston divides the nitrogen cylinder into a nitrogen chamber and a hydraulic oil chamber, and the nitrogen chamber is filled with nitrogen.

[0015] In an exemplary embodiment, a gas valve cap is provided at one end of the nitrogen cylinder away from the compression high and low speed regulating valve system assembly.

[0016] The invention discloses a vibration reduction method of a nitrogen vibration reducer, comprising the following steps:

[0017] S1. When the nitrogen shock absorber is compressed from the initial state, part of the oil in the compression chamber passes through the second oil hole of the center tube and the first piston through hole on the main piston to enter the recovery chamber, and the other part of the oil flows to the hydraulic oil chamber in the nitrogen cylinder through the compression high and low speed regulating valve system components, pushing the floating piston, compressing the nitrogen in the nitrogen chamber, and increasing the nitrogen rebuttal force;

[0018] S2. When the nitrogen shock absorber is further compressed, part of the oil in the compression chamber first passes through the second piston through hole on the buffer piston, and then passes through the first piston through hole on the main piston to enter the recovery chamber, and the other part of the oil flows to the hydraulic oil chamber in the nitrogen cylinder through the compression high and low speed regulating valve system assembly;

[0019] S3. When the nitrogen shock absorber is further compressed, part of the oil in the compression chamber first passes through the second piston through hole on the buffer piston, and then passes through the first piston through hole on the main piston to enter the recovery chamber, and the other part of the oil flows to the hydraulic oil chamber in the nitrogen cylinder through the compression high and low speed regulating valve system components, and at the same time, the compression buffer piston enters the hydraulic buffer sleeve;

[0020] S4. When the nitrogen shock absorber is further compressed and in the limit compression stroke, a part of the oil in the compression chamber first passes through the second piston through hole on the buffer piston, and then passes through the first piston through hole on the main piston to enter the recovery chamber, and the other part of the oil flows to the hydraulic oil chamber in the nitrogen cylinder through the compression high and low speed regulating valve system assembly; at the same time, the hydraulic buffer rod enters the center of the central fixed pipe, and at this time, the oil in the hydraulic buffer rod enters the compression high and low speed regulating valve system assembly through the compression hydraulic buffer regulating valve system assembly, and finally flows to the hydraulic oil chamber in the nitrogen cylinder;

[0021] S5. When the nitrogen shock absorber is in the limit compression stroke for recovery, a part of the oil in the recovery chamber enters the compression chamber through the first piston through hole of the main piston and the second piston through hole of the buffer piston in sequence, and another part of the oil in the recovery chamber enters the compression chamber through the first oil through hole of the center tube, the second oil through hole of the center tube and the second piston through hole of the buffer piston in sequence. Under the action of the nitrogen repulsion force, the oil in the hydraulic oil chamber in the nitrogen cylinder flows from the hydraulic oil chamber through the compression high and low speed regulating valve system assembly to the compression chamber;

[0022] S6. When the nitrogen shock absorber is further restored, part of the oil in the restoration chamber enters the compression chamber through the first piston through hole of the main piston, the second oil hole of the center tube and the central channel of the center fixed tube, and another part of the oil in the restoration chamber enters the compression chamber through the first oil hole of the center tube and the central channel of the center fixed tube. Under the action of the repulsive force of nitrogen, the oil in the hydraulic oil chamber in the nitrogen cylinder flows from the hydraulic oil chamber to the compression chamber through the compression high and low speed regulating valve system components;

[0023] S7. When the nitrogen shock absorber is further restored and is in the limit restoration stroke, part of the oil in the restoration chamber enters the compression chamber through the first piston through hole of the main piston, the second oil hole of the center tube and the center channel of the center fixed tube, and another part of the oil in the restoration chamber enters the compression chamber through the first oil hole of the center tube and the center channel of the center fixed tube. Under the action of the nitrogen repulsion force, the oil in the hydraulic oil chamber in the nitrogen cylinder flows from the hydraulic oil chamber through the compression high and low speed regulating valve system components to the compression chamber; at the same time, the rebound buffer piston enters the guide.

[0024] Compared with the prior art, the present invention has achieved the following technical effects:

[0025] The present invention can further improve the performance of the original adjustable compression hydraulic buffer system through a three-piston control system consisting of a main piston, a buffer piston, and a compression buffer piston in a piston valve system assembly and a compression hydraulic buffer assembly with a newly added hydraulic buffer rod, increase the hydraulic buffer stroke, and realize progressive damping hydraulic buffering. At the same time, it is more convenient to adjust the damping force value of the compression hydraulic buffer through an external compression hydraulic buffer regulating valve system assembly. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0027] Figure 1 is a schematic structural diagram of a nitrogen shock absorber according to one or more embodiments;

[0028] Figure 2 is a partial enlarged view of a rebound adjustment assembly in a nitrogen shock absorber according to one or more embodiments;

[0029] Figure 3 is a partial enlarged view of a piston valve system assembly in a nitrogen shock absorber according to one or more embodiments;

[0030] Figure 4 is a partial enlarged view of a compression hydraulic buffer assembly in a nitrogen shock absorber according to one or more embodiments;

[0031] Figure 5 A partial enlarged view of a compression hydraulic buffer regulating valve system assembly in a nitrogen shock absorber according to one or more embodiments;

[0032] Figure 6 A partial enlarged view of a compression high and low speed regulating valve system assembly in a nitrogen shock absorber according to one or more embodiments;

[0033] Figure 7 Schematic diagram of hydraulic oil flow in step S1 of a vibration reduction method for a nitrogen vibration reducer according to one or more embodiments;

[0034] Figure 8 Schematic diagram of hydraulic oil flow in step S2 of a vibration reduction method for a nitrogen vibration reducer according to one or more embodiments;

[0035] Fig. 9 Schematic diagram of hydraulic oil flow direction in step S3 of a vibration reduction method for a nitrogen vibration reducer according to one or more embodiments;

[0036] Fig.10 Schematic diagram of hydraulic oil flow in step S4 of a vibration reduction method for a nitrogen vibration reducer according to one or more embodiments;

[0037] Fig.11 Schematic diagram of hydraulic oil flow direction in step S5 of a vibration reduction method for a nitrogen vibration reducer according to one or more embodiments;

[0038] Fig.12 Schematic diagram of hydraulic oil flow in step S6 of a vibration reduction method for a nitrogen vibration reducer according to one or more embodiments;

[0039] Fig.13 Schematic diagram of hydraulic oil flow in step S7 of a vibration reduction method for a nitrogen vibration reducer according to one or more embodiments;

[0040] Fig.14 A schematic diagram of the flow direction of hydraulic oil of a compression high and low speed regulating valve system component in a vibration reduction method of a nitrogen vibration reducer according to one or more embodiments;

[0041] Fig.15 A schematic diagram of the flow direction of hydraulic oil of a compression hydraulic buffer regulating valve system component in a vibration reduction method of a nitrogen vibration reducer according to one or more embodiments;

[0042] Fig.16 A schematic diagram of the flow direction of hydraulic oil of a rebound adjustment assembly in a vibration reduction method of a nitrogen shock absorber according to one or more embodiments;

[0043] In the figure: 1-lower connecting seat; 2-rebound adjustment assembly; 201-adjusting wheel; 202-spherical ejector pin; 203-elevator; 204-rebound conical core; 205-fastening plug; 3-piston rod; 4-guide; 5-piston valve system assembly; 501-rebound buffer piston; 502-main piston; 503-buffer piston; 504-compression buffer piston; 6-compression hydraulic buffer assembly; 601-hydraulic buffer sleeve; 602-hydraulic buffer rod; 7-upper connecting seat; 8-rebound adjustment assembly; 9-rebound adjustment wheel; 10-rebound adjustment wheel; 11-rebound adjustment wheel; 12-rebound adjustment wheel; 13-rebound adjustment wheel; 14-rebound adjustment wheel; 15-rebound adjustment wheel; 16-rebound adjustment wheel; 17-rebound adjustment wheel; 18-rebound adjustment wheel; 19-rebound adjustment wheel; 20-rebound adjustment wheel; 21-rebound adjustment wheel; 22-rebound adjustment wheel; 23-rebound adjustment wheel; 24-rebound adjustment wheel; 25-rebound adjustment wheel; 26-rebound adjustment wheel; 27-rebound adjustment wheel; 28-rebound adjustment wheel; 29-rebound adjustment wheel; 30-rebound adjustment wheel; 31-rebound adjustment wheel; 32-rebound adjustment wheel; 33-rebound adjustment wheel; 34-rebound adjustment wheel; 35-rebound adjustment wheel; 36-rebound adjustment wheel; 37-rebound adjustment wheel; 38-rebound adjustment wheel; 39-rebound adjustment wheel; 40 Connector; 8-compression hydraulic buffer regulating valve system assembly; 801-buffer compression valve system; 802-buffer regulating core; 803-buffer threaded positioning seat; 9-compression high and low speed regulating valve system assembly; 901-high and low speed compression valve system; 902-spring; 903-low speed regulating core; 904-high and low speed regulating threaded positioning seat; 905-high speed regulating wheel; 10-floating piston; 11-nitrogen cylinder; 12-valve cover; 13-oil storage cylinder; 14-center fixing tube. DETAILED DESCRIPTION

[0044] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0045] The purpose of the present invention is to provide a nitrogen shock absorber and a vibration reduction method thereof, so as to solve the problems existing in the above-mentioned prior art, improve the performance of the compression hydraulic buffer system, increase the hydraulic buffer stroke, achieve the purpose of progressive damping hydraulic buffering, and thus reduce the discomfort of the driver.

[0046] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the present invention is further described in detail below with reference to the accompanying drawings and specific embodiments.

[0047] Embodiment 1

[0048] like Figure 1-Figure 6As shown, this embodiment provides a nitrogen shock absorber, including: an oil storage cylinder 13, a piston rod 3, a lower connecting seat 1, an upper connecting seat 7, a central fixed pipe 14, a piston valve system assembly 5 and a compression hydraulic buffer assembly 6. Among them, the oil storage cylinder 13 is a cylindrical structure, and the oil storage cylinder 13 is filled with hydraulic oil. The piston rod 3 is slidably connected to one end of the oil storage cylinder 13. Specifically, one end of the piston rod 3 is located inside the oil storage cylinder 13, and the other end of the piston rod 3 is located outside the oil storage cylinder 13. The lower connecting seat 1 is fixed to the end of the piston rod 3 located outside the oil storage cylinder 13, the lower connecting seat 1 is provided with an internal threaded hole, one end of the piston rod 3 is provided with an external thread, and the lower connecting seat 1 is threadedly connected with the piston rod 3. The upper connecting seat 7 is installed at the end of the oil storage cylinder 13 away from the lower connecting seat 1, the upper connecting seat 7 is provided with an internal threaded hole, and the outer wall of the corresponding end of the oil storage cylinder 13 is provided with an external thread, so that the upper connecting seat 7 is threadedly connected with the oil storage cylinder 13. During actual installation, the lower connecting seat 1 and the upper connecting seat 7 are used to connect the vehicle frame and the wheel axle respectively, so as to realize the installation of the nitrogen shock absorber. The upper connecting seat 7 is installed with a compression hydraulic buffer regulating valve system assembly 8, a compression high and low speed regulating valve system assembly 9 and a nitrogen cylinder 11, and the compression hydraulic buffer regulating valve system assembly 8 is connected with the compression high and low speed regulating valve system assembly 9, and the compression high and low speed regulating valve system assembly 9 is connected with the nitrogen cylinder 11, and the compression high and low speed regulating valve system assembly 9 is also connected with the compression chamber inside the oil storage cylinder 13. The central fixed tube 14 is fixed to one end of the piston rod 3 located inside the oil storage cylinder 13, and the central fixed tube 14 and the piston rod 3 can also be connected by threads. The end of the central fixed tube 14 close to the piston rod 3 is provided with an external thread, and the end of the piston rod 3 close to the central fixed tube 14 is provided with an internal thread, so as to realize the threaded connection between the two. A plurality of central tube first oil holes are provided on the side wall of the end of the central fixed tube 14 close to the piston rod 3 for the flow of hydraulic oil. The piston valve assembly 5 is fixed on the outer wall of the central fixed tube 14. The piston valve assembly 5 divides the oil storage cylinder 13 into a recovery chamber and a compression chamber. The side of the piston valve assembly 5 close to the lower connecting seat 1 is the recovery chamber, and the side of the piston valve assembly 5 close to the upper connecting seat 7 is the compression chamber. The piston valve assembly 5 includes a main piston 502 and a buffer piston 503. The main piston 502 is closer to the recovery chamber than the buffer piston 503. The main piston 502 is provided with a plurality of first piston through holes, and the buffer piston 503 is provided with a plurality of second piston through holes. Both sides of the first piston through holes and the second piston through holes are covered with opening and closing valve plates. The use of the opening and closing valve plates is combined here. Figure 3 Here, only the opening and closing valve plates on both sides of the first piston through hole are used as an example. Figure 3It is not difficult to see that the opening and closing valve plate is an annular valve plate, and an inclined oil leakage hole is provided at the lower left corner and the upper right corner of the first piston through hole. When the hydraulic oil flows from the recovery chamber to the compression chamber, the hydraulic oil flows in from the oil leakage hole at the lower left corner, pushes the opening and closing valve plate on the right, and flows to the compression chamber; on the contrary, if the hydraulic oil flows from the compression chamber to the recovery chamber, the hydraulic oil flows in from the oil leakage hole at the upper right corner, pushes the opening and closing valve plate on the left, and flows to the recovery chamber. The working principle of the opening and closing valve plates on both sides of the second piston through hole is the same, so it will not be repeated. There are also a number of central tube second oil holes evenly distributed on the side wall of the central fixed tube 14 in the circumferential direction. The central tube second oil hole is located between the main piston 502 and the buffer piston 503 for the passage of hydraulic oil. The compression hydraulic buffer assembly 6 includes a hydraulic buffer rod 602, which is arranged in the compression chamber, and the hydraulic buffer rod 602 is connected to the compression hydraulic buffer regulating valve system assembly 8.

[0049] When the nitrogen shock absorber is compressed from the initial state, part of the oil in the compression chamber passes through the second oil hole of the center tube and the first piston through hole on the main piston 502 to enter the recovery chamber, and the other part of the oil flows into the nitrogen cylinder 11 through the compression high and low speed regulating valve system assembly 9. When the nitrogen shock absorber is further compressed, part of the oil in the compression chamber first passes through the second piston through hole on the buffer piston 503, and then passes through the first piston through hole on the main piston 502 to enter the recovery chamber, and the other part of the oil flows into the nitrogen cylinder 11 through the compression high and low speed regulating valve system assembly 9. When the nitrogen shock absorber is further compressed, part of the oil in the compression chamber first passes through the second piston through hole on the buffer piston 503, and then passes through the first piston through hole on the main piston 502 to enter the recovery chamber, and the other part of the oil flows into the nitrogen cylinder 11 through the compression high and low speed regulating valve system assembly 9, and the compression buffer piston 504 enters the hydraulic buffer sleeve 601. When the nitrogen shock absorber is further compressed and is in the limit compression stroke, a part of the oil in the compression chamber first passes through the second piston through hole on the buffer piston 503, and then passes through the first piston through hole on the main piston 502 to enter the recovery chamber, and the other part of the oil flows into the nitrogen cylinder 11 through the compression high and low speed regulating valve system assembly 9; at the same time, the hydraulic buffer rod 602 enters the center of the central fixed pipe 14, and at this time, the oil in the hydraulic buffer rod 602 enters the compression high and low speed regulating valve system assembly 9 through the compression hydraulic buffer regulating valve system assembly 8, and finally flows into the nitrogen cylinder 11.

[0050] When the nitrogen shock absorber is in the limit compression stroke for recovery, part of the oil in the recovery chamber enters the compression chamber through the first piston through hole of the main piston 502 and the second piston through hole of the buffer piston 503 in turn, and another part of the oil in the recovery chamber enters the compression chamber through the first oil hole of the center tube, the second oil hole of the center tube and the second piston through hole of the buffer piston 503 in turn, and the oil in the hydraulic oil chamber in the nitrogen cylinder 11 flows from the hydraulic oil chamber to the compression chamber through the compression high and low speed regulating valve system component 9 under the action of the nitrogen rebuttal force. When the nitrogen shock absorber is further recovered, part of the oil in the recovery chamber enters the compression chamber through the first piston through hole of the main piston 502 and the second oil hole of the center tube, and another part of the oil in the recovery chamber enters the compression chamber through the first oil hole of the center tube and the piston center channel on the center fixed tube 14, and the oil in the hydraulic oil chamber in the nitrogen cylinder 11 flows from the hydraulic oil chamber to the compression chamber through the compression high and low speed regulating valve system component 9 under the action of the nitrogen rebuttal force. When the nitrogen shock absorber is further restored and is in the extreme restoration stroke, part of the oil in the restoration chamber enters the compression chamber through the first piston through hole of the main piston 502 and the second oil hole of the center tube, and another part of the oil in the restoration chamber enters the compression chamber through the first oil hole of the center tube and the central channel of the piston on the center fixed tube 14, and the hydraulic oil chamber in the nitrogen cylinder 11 flows to the compression chamber through the compression high and low speed regulating valve system assembly 9.

[0051] In this embodiment, if Figure 3 As shown, the piston valve system assembly 5 further includes a rebound buffer piston 501 and a compression buffer piston 504 . The rebound buffer piston 501 is located on a side of the main piston 502 away from the buffer piston 503 , and the compression buffer piston 504 is located on a side of the buffer piston 503 away from the main piston 502 .

[0052] A guide 4 is installed at one end of the oil storage cylinder 13 near the lower connecting seat 1. The guide 4 is a cylindrical structure with one end closed. A plurality of first oil pressure regulating through holes are provided on the side wall of the guide 4, and each first oil pressure regulating through hole is along the Figure 2 The first oil pressure regulating holes are spaced apart in the horizontal direction, and the apertures of the first oil pressure regulating holes are the same, and of course they can be gradually increased or decreased. When the piston valve system assembly 5 moves toward the guide 4, the rebound buffer piston 501 can be inserted into the guide 4, and the rebound buffer piston 501 and the guide 4 can form a first pressure adjustable cavity, and the hydraulic oil in the first pressure adjustable cavity can flow out through the first oil pressure regulating hole. As the rebound buffer piston 501 continues to move toward the bottom of the guide 4, the number of first oil pressure regulating holes blocked by the rebound buffer piston 501 increases, that is, the number of first oil pressure regulating holes for the hydraulic oil in the first pressure adjustable cavity to flow out decreases, until all the first oil pressure regulating holes are blocked. In this process, the damping force on the rebound buffer piston 501 in the first pressure adjustable cavity continues to increase.

[0053] Correspondingly, the compression hydraulic buffer assembly 6 also includes a hydraulic buffer sleeve 601, which is also a cylindrical structure with one end closed. The hydraulic buffer sleeve 601 is installed at one end of the oil storage cylinder 13 close to the upper connecting seat 7, and the bottom of the hydraulic buffer sleeve 601 is arranged close to the upper connecting seat 7. A plurality of second oil pressure regulating through holes are arranged on the side wall of the hydraulic buffer sleeve 601. When the piston valve system assembly 5 moves toward the hydraulic buffer sleeve 601, the compression buffer piston 504 can be inserted into the hydraulic buffer sleeve 601, and a second pressure adjustable cavity is formed between the hydraulic buffer sleeve 601 and the compression buffer piston 504. The hydraulic oil in the second pressure adjustable cavity can flow out through the second oil pressure regulating through hole. As the compression buffer piston 504 continuously moves toward the bottom of the hydraulic buffer sleeve 601, the number of second oil pressure regulating through holes blocked by the compression buffer piston 504 increases, that is, the number of second oil pressure regulating through holes for the hydraulic oil in the second pressure adjustable cavity to flow out decreases, until all the second oil pressure regulating through holes are blocked. In this process, the damping force on the compression buffer piston 504 in the second pressure adjustable cavity continuously increases.

[0054] In this embodiment, the central inner ring of the hydraulic buffer sleeve 601 is provided with an internal thread, and the outer side of the hydraulic buffer rod 602 is provided with an external thread. The central inner ring of the hydraulic buffer sleeve 601 is threadedly connected with the outer side of the hydraulic buffer rod 602. The outer wall of the hydraulic buffer sleeve 601 is provided with a clamping protrusion. Figure 4 The clamped protrusion is located below the hydraulic buffer sleeve 601, and the clamped protrusion is located between the oil storage cylinder 13 and the upper connecting seat 7. The oil storage cylinder 13 and the upper connecting seat 7 are connected by threads, the outer wall of the oil storage cylinder 13 is provided with external threads, and the upper connecting seat 7 is provided with corresponding internal thread holes. When the oil storage cylinder 13 and the upper connecting seat 7 are threadedly connected, the clamped protrusion can be clamped between the oil storage cylinder 13 and the upper connecting seat 7.

[0055] In this embodiment, a first guide groove is provided on the outer wall of the guide 4, and a second guide groove is provided on the inner wall of the oil storage cylinder 13. The first guide groove and the second guide groove are positioned opposite to each other, and a first retaining spring is commonly clamped in the first guide groove and the second guide groove, so as to fix the guide 4.

[0056] In this embodiment, if Figure 2As shown, it also includes a rebound adjustment component 2, which includes an adjustment wheel 201, a spherical ejector pin 202, a push rod 203, a rebound conical core 204 and a fastening plug 205. The adjustment wheel 201 is threadedly connected to the lower connecting seat 1, and the lower connecting seat 1 is provided with an internal threaded hole corresponding thereto. The adjustment wheel 201 has a conical portion, and the diameter of the conical portion gradually decreases from top to bottom. The push rod 203 is slidably connected to the piston center channel of the piston rod 3. A spherical ejector pin 202 is fixed to one end of the push rod 203, and one end of the spherical ejector pin 202 away from the ejector pin 203 abuts against the conical portion. The other end of the ejector pin 203 is connected to the rebound conical core 204. The fastening plug 205 is installed in the central fixing tube 14, and a fastening center channel is provided in the center of the fastening plug 205. The fastening center channel is connected with the interior of the center fixed tube 14, and a first oil hole of the center tube is provided between the rebound cone core 204 and the fastening plug 205. When hydraulic oil needs to flow from the first oil hole of the center tube into the interior of the center fixed tube 14 or from the interior of the center fixed tube 14 into the first oil hole of the center tube, the hydraulic oil must pass through the gap between the rebound cone core 204 and the fastening plug 205. Therefore, by adjusting the position of the rebound cone core 204, the size of the gap between the rebound cone core 204 and the fastening plug 205 can be adjusted, thereby adjusting the damping force of the nitrogen shock absorber.

[0057] In actual use, by rotating the adjusting wheel 201, the adjusting wheel 201 can be moved up and down in the corresponding internal threaded hole, so that the tapered portion can also move up and down. Since the contact surface between the spherical ejector pin 202 and the tapered portion is an inclined surface, the tapered portion can push the spherical ejector pin 202, the ejector rod 203 and the rebound tapered core 204 to move left and right during the up and down movement, thereby adjusting the gap between the rebound tapered core 204 and the fastening plug 205, so as to adjust the damping force of the nitrogen shock absorber.

[0058] In this embodiment, if Figure 5 As shown, the compression hydraulic buffer regulating valve system assembly 8 is installed at the corresponding groove of the upper connecting seat 7. The compression hydraulic buffer regulating valve system assembly 8 includes a buffer compression valve system 801, a buffer regulating core 802 and a buffer thread positioning seat 803. The buffer compression valve system 801 is fixed on the outer wall of the lower end of the buffer thread positioning seat 803. The buffer compression valve system 801 is provided with a plurality of first buffer compression valve piston through holes in the circumferential direction, and each first buffer compression valve piston through hole is connected with a first valve plate. The external thread on the outer wall of the buffer thread positioning seat 803 is used for threaded connection with the corresponding groove. The center of the buffer thread positioning seat 803 is provided with a first regulating core through hole, and the upper end of the first regulating core through hole is also threadedly connected with the buffer regulating core 802. The side wall of the buffer thread positioning seat 803 is provided with a first regulating core oil through hole. By twisting the buffer regulating core 802, it can move up and down, thereby adjusting the aperture size of the first regulating core oil through hole.

[0059] In this embodiment, if Figure 6 As shown, the compression high and low speed regulating valve system assembly 9 is installed at the corresponding groove of the upper connecting seat 7. The compression high and low speed regulating valve system assembly 9 includes a high and low speed compression valve system 901, a spring 902, a low speed regulating core 903, a high and low speed regulating threaded positioning seat 904 and a high speed regulating wheel 905. The high and low speed compression valve system 901 is installed at the lower end of the high and low speed regulating threaded positioning seat 904, and the external thread of the outer wall of the high and low speed regulating threaded positioning seat 904 is used for threaded connection with the internal thread of the corresponding groove. The high-speed and low-speed compression valve system 901 is provided with a second high-speed and low-speed compression valve piston through hole, and the second high-speed and low-speed compression valve piston through hole is connected to the second valve plate, the outer wall of the high-speed adjustment wheel 905 is provided with an external thread, and the central through hole of the high-speed and low-speed adjustment thread positioning seat 904 is provided with an internal thread, and the high-speed adjustment wheel 905 is threadedly installed at the center of the high-speed and low-speed adjustment thread positioning seat 904, and a spring 902 is provided between the second valve plate and the high-speed adjustment wheel 905. When the high-speed adjustment wheel 905 is turned, the up and down position of the high-speed adjustment wheel 905 can be adjusted to adjust the compression force on the spring 902, and further adjust the pressure on the second valve plate. The center of the high-speed adjustment wheel 905 is provided with a second adjustment core through hole, and the upper end of the second adjustment core through hole is also threadedly connected with a low-speed adjustment core 903, and the side wall of the high-speed adjustment wheel 905 is provided with a second adjustment core oil through hole, and the low-speed adjustment core 903 can be moved up and down by turning it, so as to adjust the aperture size of the second adjustment core oil through hole.

[0060] In this embodiment, a floating piston 10 is slidably connected in the nitrogen cylinder 11, and a sealing ring is provided on the outer wall of the floating piston 10 to enhance the sealing between the floating piston 10 and the nitrogen cylinder 11. The floating piston 10 divides the nitrogen cylinder 11 into a nitrogen chamber and a hydraulic oil chamber, and the nitrogen chamber is filled with nitrogen, and the compression high and low speed regulating valve system assembly 9 can be connected to the hydraulic oil chamber.

[0061] In this embodiment, a valve cap 12 is provided at one end of the nitrogen cylinder 11 away from the compression high and low speed regulating valve system assembly 9, so as to seal the nitrogen cavity. Further, the valve cap 12 can be fixed by means of a retaining ring, that is, a fixed groove is provided at the corresponding position of the valve cap 12 and the nitrogen cylinder 11, and the retaining ring is installed in the two fixed grooves to fix the valve cap 12.

[0062] Embodiment 2

[0063] like Figure 7-Figure 16 As shown, this embodiment provides a vibration reduction method of a nitrogen vibration damper, based on a nitrogen vibration damper disclosed in an embodiment, comprising the following steps:

[0064] S1, such as Figure 7As shown, when the nitrogen shock absorber is compressed from the initial state (i.e. the piston rod 3 moves to the right), part of the oil in the compression chamber passes through the second oil hole of the center tube and the first piston through hole on the main piston 502 in turn to enter the recovery chamber, and the other part of the oil flows to the hydraulic oil chamber in the nitrogen cylinder 11 through the compression high and low speed regulating valve system component 9, pushing the floating piston 10, compressing the nitrogen in the nitrogen chamber, and increasing the nitrogen repulsion force. Under this working condition, the compression damping force of the nitrogen shock absorber is relatively small.

[0065] S2, such as Figure 8 As shown, when the nitrogen shock absorber is further compressed on the basis of step S1, a part of the oil in the compression chamber first passes through the second piston through hole on the buffer piston 503, and then passes through the first piston through hole on the main piston 502 to enter the recovery chamber, and the other part of the oil flows through the compression high and low speed regulating valve system component 9 to the hydraulic oil chamber in the nitrogen cylinder 11. Compared with step S1, since the hydraulic oil has added the process of passing through the second piston through hole on the buffer piston 503, the compression damping force of the nitrogen shock absorber under this working condition is increased relative to that under the working condition S1.

[0066] S3, such as Fig. 9 As shown, when the nitrogen shock absorber is further compressed on the basis of step S2, the oil flow direction is consistent with that under the S2 working condition. A part of the oil in the compression chamber first passes through the second piston through hole on the buffer piston 503, and then passes through the first piston through hole on the main piston 502 to enter the recovery chamber. The other part of the oil flows to the hydraulic oil chamber in the nitrogen cylinder 11 through the compression high and low speed regulating valve system component 9. At the same time, the compression buffer piston 504 enters the hydraulic buffer sleeve 601. As the compression buffer piston 504 continues to move toward the bottom of the hydraulic buffer sleeve 601, the number of second oil pressure regulating through holes blocked by the compression buffer piston 504 increases, that is, the number of second oil pressure regulating through holes for the hydraulic oil in the second pressure adjustable cavity to flow out decreases, until all the second oil pressure regulating through holes are blocked. In this process, the damping force on the compression buffer piston 504 in the second pressure adjustable cavity continues to increase, so that the compression damping force of the nitrogen shock absorber under this working condition continues to increase relative to that under the S2 working condition.

[0067] S4, such as Fig.10As shown, when the nitrogen shock absorber is further compressed on the basis of step S3 and is in the limit compression stroke, the oil flow direction is consistent with that under the S3 working condition. A part of the oil in the compression chamber first passes through the second piston through hole on the buffer piston 503, and then passes through the first piston through hole on the main piston 502 to enter the recovery chamber, and the other part of the oil flows to the hydraulic oil chamber in the nitrogen cylinder 11 through the compression high and low speed regulating valve system component 9. At the same time, the hydraulic buffer rod 602 enters the center of the central fixed pipe 14, thereby forming a new hydraulic chamber. At this time, the oil in the hydraulic buffer rod 602 enters the compression high and low speed regulating valve system component 9 through the compression hydraulic buffer regulating valve system component 8, and finally flows to the hydraulic oil chamber in the nitrogen cylinder 11. Under this working condition, the compression damping force of the nitrogen shock absorber is further increased compared with the working condition of S3.

[0068] This structure improves the performance of the compression hydraulic buffer system and increases the hydraulic buffer stroke. From steps S1 to S4, the compression damping force of the nitrogen shock absorber gradually increases, thereby realizing progressive damping hydraulic buffering.

[0069] S5, such as Fig.11 As shown, when the nitrogen shock absorber is in the limit compression stroke for restoration (i.e., the piston rod 3 moves to the left), a part of the oil in the restoration chamber enters the compression chamber through the first piston through hole of the main piston 502 and the second piston through hole of the buffer piston 503 in turn, and another part of the oil in the restoration chamber enters the compression chamber through the first oil hole of the center tube, the second oil hole of the center tube and the second piston through hole of the buffer piston 503 in turn. Under the action of the nitrogen repulsion force, the oil in the hydraulic oil chamber in the nitrogen cylinder 11 flows from the hydraulic oil chamber through the compression high and low speed regulating valve system assembly 9 to the compression chamber. Under this working condition, the restoring damping force of the nitrogen shock absorber is relatively large.

[0070] S6, such as Fig.12 As shown, when the nitrogen shock absorber is further restored on the basis of step S5, a part of the oil in the restoration chamber enters the compression chamber through the first piston through hole of the main piston 502, the second oil hole of the center tube and the center channel of the center fixed tube 14, and another part of the oil in the restoration chamber enters the compression chamber through the first oil hole of the center tube and the center channel of the center fixed tube 14. The oil flow direction of the hydraulic oil chamber in the nitrogen cylinder 11 is consistent with S5. Under the action of the nitrogen repulsion force, the oil in the hydraulic oil chamber in the nitrogen cylinder 11 flows from the hydraulic oil chamber through the compression high and low speed regulating valve system component 9 to the compression chamber. Under this working condition, the restoring damping force of the nitrogen shock absorber is reduced compared with that under the working condition of S5, thereby realizing the rapid reset of the piston rod 3.

[0071] S7, such as Fig.13As shown, when the nitrogen shock absorber is further restored on the basis of step S6, when it is in the limit restoration stroke, the oil flow direction of the restoration chamber is consistent with the working condition of step S6, a part of the oil in the restoration chamber enters the compression chamber through the first piston through hole of the main piston 502, the second oil hole of the center tube and the center channel of the center fixed tube 14, and another part of the oil in the restoration chamber enters the compression chamber through the first oil hole of the center tube and the center channel of the center fixed tube 14. The oil flow direction of the auxiliary oil chamber in the nitrogen cylinder 11 is consistent with step S6. Under the action of the nitrogen repulsion force, the oil in the hydraulic oil chamber in the nitrogen cylinder 11 flows from the hydraulic oil chamber through the compression high and low speed regulating valve system component 9 to the compression chamber. At the same time, the rebound buffer piston 501 enters the guide 4. As the rebound buffer piston 501 continuously moves toward the bottom of the guide 4, the number of first oil pressure regulating through holes blocked by the rebound buffer piston 501 increases, that is, the number of first oil pressure regulating through holes for the hydraulic oil in the first pressure adjustable cavity to flow out decreases, until all the first oil pressure regulating through holes are blocked. In this process, the damping force on the rebound buffer piston 501 in the first pressure adjustable cavity continues to increase. Under this working condition, the restoring damping force of the nitrogen shock absorber increases relative to the working condition of step S6. This structure can establish a larger rebound buffer force value in a short stroke, replace the traditional hard collision buffer with a hydraulic buffer system, absorb impact energy, and reduce the chassis acceleration at the end of the rebound, thereby improving the comfort of the driver.

[0072] In addition, if Fig.14 As shown, the working principle of the compression high and low speed regulating valve system component 9 is as follows:

[0073] During the compression process of the nitrogen shock absorber, the oil in the compression chamber will pass through the compression high and low speed regulating valve system assembly 9 and enter the hydraulic oil chamber in the nitrogen cylinder 11. The amount of oil in this part is equal to the volume of the piston rod 3 entering the oil storage cylinder 13.

[0074] When the oil enters the high and low speed compression regulating valve system assembly 9, the oil will flow in two ways. A part of the oil will enter from the middle through hole of the high and low speed regulating threaded positioning seat 904, and by rotating the low speed regulating core 903, it will be misaligned with the oil passage of the second regulating core through hole, changing the area through which the oil passes, changing the flow of the oil, and thus changing the compression damping force. Because at this time, the oil with a lower pressure passes, which affects the compression damping force of the nitrogen shock absorber at the low speed stage. The shock absorber movement speed of 0.3m / s or less is considered low speed, 0.3m / s to 1.0m / s is considered medium speed, and 1.0m / s or more is considered high speed. When the speed of the nitrogen shock absorber is relatively high, the oil through hole of the second regulating core is not enough to meet the amount of oil passing through. At this time, the oil pressure is relatively high, and the oil will flow in from the second high and low speed compression valve piston through hole on the high and low speed compression valve system 901, forcing the second valve plate to open, so that the two oils merge and flow into the hydraulic oil chamber of the nitrogen cylinder 11 together. By rotating the high-speed adjustment wheel 905 and compressing the spring 902, a preload force is applied to the second valve plate, thereby changing the flow rate of the oil and affecting the damping force of the shock absorber at the high-speed stage.

[0075] like Fig.15 As shown, the working principle of the compression hydraulic buffer regulating valve system component 8 is as follows:

[0076] During the compression process of the nitrogen shock absorber, when it is in the limit compression stroke, the hydraulic buffer rod 602 enters the central fixed tube 14 to form a hydraulic cavity and establish a compression damping force. The oil in the hydraulic cavity can enter the compression hydraulic buffer regulating valve system component 8 through the through hole in the hydraulic buffer rod 602, and then pass through the compression high and low speed regulating valve system component 9, and finally enter the hydraulic oil cavity in the nitrogen cylinder 11.

[0077] When the oil enters the compression hydraulic buffer regulating valve system assembly 8, the oil will flow in two ways. A part of the oil will enter from the middle through hole of the buffer threaded positioning seat 803 and flow out through the first regulating core through hole. The other part of the oil will flow in from the first buffer compression valve piston through hole of the buffer compression valve system 801, forcing the first valve plate to open. The two oils will merge together, pass through the compression high and low speed regulating valve system assembly 9, and finally enter the hydraulic oil chamber in the nitrogen cylinder 11. By rotating the buffer regulating core 802, it is misaligned with the oil through hole of the first regulating core, the area through which the oil passes is changed, and the size of the hydraulic buffer damping force is adjusted by controlling the flow rate of the hydraulic buffer oil.

[0078] like Fig.16 As shown, the working principle of the rebound adjustment component 2 is as follows:

[0079] During the recovery process of the nitrogen shock absorber, part of the oil in the recovery chamber will flow into the compression chamber through the first piston through hole of the main piston 502 and the second piston through hole of the buffer piston 503, and a recovery damping force will be generated when the oil passes through; the other part of the oil will enter the compression chamber through the first oil hole of the center tube and the center channel of the center fixed tube 14.

[0080] When the oil enters the rebound adjustment assembly 2, the oil in the recovery chamber flows in from the first oil hole of the central tube, flows out through the gap between the rebound cone core 204 and the fastening plug 205, and flows into the compression chamber. By turning the adjustment wheel 201, the spherical ejector pin 202 moves forward and backward, thereby pushing the ejector rod 203 to move forward and backward. Changing the gap between the rebound cone core 204 and the fastening plug 205 changes the area through which the oil passes, changes the flow of the oil, and thus changes the recovery damping force.

[0081] The present invention uses specific examples to illustrate the principles and implementation methods of the present invention. The above examples are only used to help understand the method and core ideas of the present invention. At the same time, for those skilled in the art, according to the ideas of the present invention, there will be changes in the specific implementation methods and application scope. In summary, the content of this specification should not be understood as limiting the present invention.

Claims

1. A nitrogen shock absorber, characterized in that: include: An oil storage cylinder (13), wherein hydraulic oil is contained in the oil storage cylinder (13); A piston rod (3), wherein the piston rod (3) is slidably connected to the oil storage cylinder (13), one end of the piston rod (3) is located inside the oil storage cylinder (13), and the other end of the piston rod (3) is located outside the oil storage cylinder (13); A lower connecting seat (1), the lower connecting seat (1) being fixed to one end of the piston rod (3) located outside the oil storage cylinder (13); An upper connecting seat (7), the upper connecting seat (7) being mounted on one end of the oil storage cylinder (13) away from the lower connecting seat (1), the upper connecting seat (7) being mounted with a compression hydraulic buffer regulating valve system assembly (8), a compression high and low speed regulating valve system assembly (9) and a nitrogen cylinder (11), the compression hydraulic buffer regulating valve system assembly (8) being connected to the compression high and low speed regulating valve system assembly (9), the compression high and low speed regulating valve system assembly (9) being connected to the nitrogen cylinder (11), and the compression high and low speed regulating valve system assembly (9) being also connected to the interior of the oil storage cylinder (13); A central fixed tube (14), the central fixed tube (14) being fixed to one end of the piston rod (3) located inside the oil storage cylinder (13), and a plurality of central tube first oil holes being arranged on a side wall of one end of the central fixed tube (14) close to the piston rod (3); A piston valve assembly (5), the piston valve assembly (5) being fixed on the outer wall of the central fixed tube (14), the piston valve assembly (5) dividing the oil storage cylinder (13) into a restoring chamber and a compression chamber, the side of the piston valve assembly (5) close to the lower connecting seat (1) being the restoring chamber, the side of the piston valve assembly (5) close to the upper connecting seat (7) being the compression chamber, the piston valve assembly (5) comprising a main piston (502) and a buffer piston (503), the main piston (502) being provided with a plurality of first piston through holes, the buffer piston (503) being provided with a plurality of second piston through holes, the side wall of the central fixed tube (14) being evenly distributed in the circumferential direction, the second oil through holes of the central tube being located between the main piston (502) and the buffer piston (503); and A compression hydraulic buffer assembly (6), the compression hydraulic buffer assembly (6) comprising a hydraulic buffer rod (602), the hydraulic buffer rod (602) being arranged in the compression chamber, and the hydraulic buffer rod (602) being connected to the compression hydraulic buffer regulating valve system assembly (8).

2. The nitrogen shock absorber according to claim 1, characterized in that: The piston valve system assembly (5) further comprises a rebound buffer piston (501) and a compression buffer piston (504), wherein the rebound buffer piston (501) is located on a side of the main piston (502) away from the buffer piston (503), and the compression buffer piston (504) is located on a side of the buffer piston (503) away from the main piston (502); A guide (4) is installed at one end of the oil storage cylinder (13) close to the lower connecting seat (1), and a plurality of first oil pressure regulating through holes are provided on the side wall of the guide (4). When the piston valve system assembly (5) moves toward the guide (4), the rebound buffer piston (501) can be inserted into the guide (4); The compression hydraulic buffer assembly (6) also includes a hydraulic buffer sleeve (601), which is installed on one end of the oil storage cylinder (13) close to the upper connecting seat (7). A plurality of second oil pressure regulating through holes are provided on the side wall of the hydraulic buffer sleeve (601). When the piston valve system assembly (5) moves toward the hydraulic buffer sleeve (601), the compression buffer piston (504) can be inserted into the hydraulic buffer sleeve (601).

3. The nitrogen shock absorber according to claim 2, characterized in that: The hydraulic buffer sleeve (601) is threadedly connected to the outer side of the hydraulic buffer rod (602); a clamped protrusion is provided on the outer wall of the hydraulic buffer sleeve (601); the oil storage cylinder (13) and the upper connecting seat (7) are threadedly connected; the clamped protrusion can be clamped between the oil storage cylinder (13) and the upper connecting seat (7).

4. The nitrogen shock absorber according to claim 2, characterized in that: A first guide slot is provided on the outer wall of the guide (4), and a second guide slot is provided on the inner wall of the oil storage cylinder (13). The first guide slot and the second guide slot are directly opposite to each other, and a first retaining spring is commonly engaged in the first guide slot and the second guide slot.

5. The nitrogen shock absorber according to claim 1, characterized in that: The invention also comprises a rebound adjustment component (2), wherein the rebound adjustment component (2) comprises an adjustment wheel (201), a spherical ejector pin (202), a push rod (203), a rebound conical core (204) and a fastening plug (205), wherein the adjustment wheel (201) is threadedly connected to the lower connecting seat (1), the adjustment wheel (201) has a conical portion, the push rod (203) is slidably connected to the piston center channel of the piston rod (3), the spherical ejector pin (202) is fixed to one end of the push rod (203), the end of the spherical ejector pin (202) away from the ejector pin (203) abuts against the conical portion, the other end of the ejector pin (203) is connected to the rebound conical core (204), and the fastening plug (205) is installed in the central fixed tube (14), and a first oil hole of the central tube is provided between the rebound conical core (204) and the fastening plug (205).

6. The nitrogen shock absorber according to claim 1, characterized in that: The compression hydraulic buffer regulating valve system assembly (8) comprises a buffer compression valve system (801), a buffer regulating core (802) and a buffer thread positioning seat (803); the buffer compression valve system (801) is fixed on the outer wall of the lower end of the buffer thread positioning seat (803); the buffer compression valve system (801) is provided with a first buffer compression valve piston through hole, the first buffer compression valve piston through hole is connected to a first valve plate, the center of the buffer thread positioning seat (803) is provided with a first regulating core through hole, the upper end of the first regulating core through hole is also threadedly connected to the buffer regulating core (802), and the side wall of the buffer thread positioning seat (803) is provided with a first regulating core oil through hole.

7. The nitrogen shock absorber according to claim 1, characterized in that: The compression high and low speed regulating valve system assembly (9) comprises a high and low speed compression valve system (901), a spring (902), a low speed regulating core (903), a high and low speed regulating threaded positioning seat (904) and a high speed regulating wheel (905). The high and low speed compression valve system (901) is installed at the lower end of the high and low speed regulating threaded positioning seat (904). The high and low speed compression valve system (901) is provided with a second high and low speed compression valve piston through hole, and the second high and low speed compression valve piston through hole is connected to a second valve plate. The high speed regulating wheel (905) is installed at the center of the high and low speed regulating threaded positioning seat (904). The spring (902) is provided between the second valve plate and the high speed regulating wheel (905). The center of the high speed regulating wheel (905) is provided with a second regulating core through hole, and the upper end of the second regulating core through hole is threadedly connected to the low speed regulating core (903). The side wall of the high speed regulating wheel (905) is provided with a second regulating core oil through hole.

8. The nitrogen shock absorber according to claim 1, characterized in that: A floating piston (10) is slidably connected inside the nitrogen cylinder (11), and the floating piston (10) divides the nitrogen cylinder (11) into a nitrogen chamber and a hydraulic oil chamber, and the nitrogen chamber is filled with nitrogen.

9. The nitrogen shock absorber according to claim 1, characterized in that: A gas valve cover (12) is provided at one end of the nitrogen cylinder (11) away from the compression high and low speed regulating valve system assembly (9).

10. A vibration reduction method for a nitrogen vibration damper, characterized in that: The nitrogen shock absorber according to any one of claims 1 to 9 comprises the following steps: S1. When the nitrogen shock absorber is compressed from the initial state, a part of the oil in the compression chamber passes through the second oil hole of the central tube and the first piston through hole on the main piston (502) to enter the recovery chamber, and the other part of the oil flows through the compression high and low speed regulating valve system component (9) to the hydraulic oil chamber in the nitrogen cylinder (11), pushing the floating piston (10), compressing the nitrogen in the nitrogen chamber, and increasing the nitrogen repulsion force; S2. When the nitrogen shock absorber is further compressed, a part of the oil in the compression chamber first passes through the second piston through hole on the buffer piston (503), and then passes through the first piston through hole on the main piston (502) to enter the recovery chamber, and the other part of the oil passes through the compression high and low speed regulating valve system assembly (9) and flows to the hydraulic oil chamber in the nitrogen cylinder (11); S3. When the nitrogen shock absorber is further compressed, a part of the oil in the compression chamber first passes through the second piston through hole on the buffer piston (503), and then passes through the first piston through hole on the main piston (502) to enter the recovery chamber, and the other part of the oil flows to the hydraulic oil chamber in the nitrogen cylinder (11) through the compression high and low speed regulating valve system component (9), and at the same time compresses the buffer piston (504) and enters the hydraulic buffer sleeve (601); S4. When the nitrogen shock absorber is further compressed and reaches the limit compression stroke, a part of the oil in the compression chamber first passes through the second piston through hole on the buffer piston (503), and then passes through the first piston through hole on the main piston (502) to enter the recovery chamber, and the other part of the oil flows to the hydraulic oil chamber in the nitrogen cylinder (11) through the compression high and low speed regulating valve system assembly (9); at the same time, the hydraulic buffer rod (602) enters the center of the central fixed pipe (14), and at this time, the oil in the hydraulic buffer rod (602) enters the compression high and low speed regulating valve system assembly (9) through the compression hydraulic buffer regulating valve system assembly (8), and finally flows to the hydraulic oil chamber in the nitrogen cylinder (11); S5. When the nitrogen shock absorber is in the limit compression stroke and is restoring, a part of the oil in the restoring chamber enters the compression chamber through the first piston through hole of the main piston (502) and the second piston through hole of the buffer piston (503) in sequence, and another part of the oil in the restoring chamber enters the compression chamber through the first oil through hole of the center tube, the second oil through hole of the center tube and the second piston through hole of the buffer piston (503) in sequence. Under the action of the nitrogen repulsion force, the oil in the hydraulic oil chamber in the nitrogen cylinder (11) flows from the hydraulic oil chamber through the compression high and low speed regulating valve system component (9) to the compression chamber; S6. When the nitrogen shock absorber is further restored, a part of the oil in the restoration chamber enters the compression chamber through the first piston through hole of the main piston (502), the second oil hole of the center tube and the center channel of the center fixing tube (14), and another part of the oil in the restoration chamber enters the compression chamber through the first oil hole of the center tube and the center channel of the center fixing tube (14). Under the action of the repulsive force of nitrogen, the oil in the hydraulic oil chamber in the nitrogen cylinder (11) flows from the hydraulic oil chamber to the compression chamber through the compression high and low speed regulating valve system component (9); S7. When the nitrogen shock absorber is further restored and is in the limit restoration stroke, a part of the oil in the restoration chamber enters the compression chamber through the first piston through hole of the main piston (502), the second oil hole of the center tube and the center channel of the center fixing tube (14), and another part of the oil in the restoration chamber enters the compression chamber through the first oil hole of the center tube and the center channel of the center fixing tube (14). Under the action of the nitrogen repulsion force, the oil in the hydraulic oil chamber in the nitrogen cylinder (11) flows from the hydraulic oil chamber through the compression high and low speed regulating valve system component (9) to the compression chamber; at the same time, the rebound buffer piston (501) enters the guide (4).

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