Twin-rod single-tube shock absorber

Abstract

The present invention discloses a double-rod single-tube shock absorber, which includes a shock absorber body. A nitrogen gas chamber is arranged inside the shock absorber body. An active piston assembly is arranged outside the nitrogen gas chamber. An active chamber is arranged outside the active piston assembly. A piston push rod assembly is arranged inside the active piston assembly. A shock absorber valve system is arranged on one side of the piston push rod assembly. A push rod guide sleeve is arranged on the other side of the piston push rod assembly. A skeleton oil seal is arranged on one side of the push rod guide sleeve. A positioning pad is arranged outside the piston push rod assembly. By setting the shock absorber valve system, the skeleton oil seal, the push rod guide sleeve, the piston push rod assembly, the active chamber, the active piston assembly, and the nitrogen gas chamber, the double-rod single-tube shock absorber can achieve a more rapid response, effectively reduce the possibility of oil leakage, have a larger adjustable range of the shock absorber damping value, effectively improve the problem that welding slag in the cylinder affects the cleanliness, and be more reliable under the lateral force of the shock absorber.

Description

Technical Field

[0001] The present invention relates to the technical field of shock absorbers, specifically a double-rod single-tube shock absorber. Background Art

[0002] A shock absorber is a device for accelerating the attenuation of the vibration of the vehicle frame and body to improve the ride comfort (comfort) of the vehicle. Shock absorbers are installed inside the suspension systems of most vehicles.

[0003] When the vehicle frame and axle move reciprocally relative to each other, and the piston in the shock absorber also moves reciprocally in the cylinder barrel, the oil in the shock absorber housing repeatedly flows from one inner cavity through some narrow pores into another inner cavity. At this time, the friction between the pore wall and the oil and the internal friction of the liquid molecules form a damping force on the vibration, converting the vibration energy of the vehicle body and frame into heat energy, which is absorbed by the oil and the shock absorber housing, and then dissipated into the atmosphere. The magnitude of the shock absorber damping force increases and decreases with the increase and decrease of the relative speed between the vehicle frame and the axle (or wheel), and is related to the viscosity of the oil. It is required that the viscosity of the oil used in the shock absorber is affected as little as possible by temperature changes; and it has properties such as anti-vaporization, anti-oxidation, and no corrosion to various metal and non-metal parts.

[0004] Currently, all single-tube shock absorbers on the market adopt a design with one end welded and the other end sealed with a piston push rod. There is only one shock absorber valve system inside, and the damping value adjustment is limited. And only one end of the piston is used to achieve the stroke. The piston stroke is relatively long, and due to the relatively high air pressure, it is easy to damage the skeleton oil seal and cause oil leakage. Summary of the Invention

[0005] The purpose of the present invention is to provide a double-rod single-tube shock absorber for the deficiencies of the existing technology, to solve the problems that all single-tube shock absorbers on the market adopt a design with one end welded and the other end sealed with a piston push rod. There is only one shock absorber valve system inside, and the damping value adjustment is limited. And only one end of the piston is used to achieve the stroke. The piston stroke is relatively long, and due to the relatively high air pressure, it is easy to damage the skeleton oil seal and cause oil leakage.

[0006] To achieve the above purpose, the present invention provides the following technical solution: A double-rod single-tube shock absorber, including a shock absorber main body. A nitrogen gas chamber is arranged inside the shock absorber main body. An active piston assembly is arranged outside the nitrogen gas chamber. An active chamber is arranged outside the active piston assembly. A piston push rod assembly is arranged inside the active piston assembly. A shock absorber valve system is arranged on one side of the piston push rod assembly. A push rod guide sleeve is arranged on the other side of the piston push rod assembly. A skeleton oil seal is arranged on one side of the push rod guide sleeve. A positioning pad is arranged outside the piston push rod assembly.

[0007] As a preferred technical solution of the present invention, the number of the active piston assemblies is set to two groups. The active piston assemblies are symmetrically arranged on both sides of the nitrogen gas chamber. Nitrogen gas is filled inside the nitrogen gas chamber.

[0008] As a preferred technical solution of the present invention, the outer diameter dimension of the movable piston assembly is adapted to the inner wall dimension of the shock absorber body, and the movable piston assembly is movably connected to the inner wall of the shock absorber body.

[0009] As a preferred technical solution of the present invention, two sets of piston push rod assemblies are provided, the piston push rod assemblies are symmetrically arranged, an activity groove is arranged inside the shock absorber body, the dimension of the outer diameter of the shock absorber valve system is adapted to the dimension of the inner wall of the activity groove, a piston push rod is arranged on one side of the piston push rod assembly, the piston push rod is movably connected to the inner wall of the activity groove through the shock absorber valve system, and two sets of shock absorber valve systems are also provided.

[0010] As a preferred technical solution of the present invention, a sealing piston is arranged on one side of the movable piston assembly, a positioning groove is arranged on the other side of the movable piston assembly, a piston ring is arranged on the outside of the sealing piston, a positioning block is arranged on one side of the shock absorber valve system, the dimension of the positioning block is adapted to the dimension of the positioning groove, the shock absorber valve system is clamped to the positioning groove through the positioning block, the outer diameter dimension of the piston ring is adapted to the inner wall dimension of the shock absorber body, and the movable piston assembly is movably connected to the shock absorber body through the piston ring.

[0011] As a preferred technical solution of the present invention, a fixing block is arranged on one side of the skeleton oil seal, a positioning card slot is arranged on the outside of the fixing block, a positioning card block is arranged inside the shock absorber body, the fixing block is clamped to the positioning card block through the positioning card slot, the skeleton oil seal is clamped to the shock absorber body through the fixing block, and a sealing block is arranged on one side of the skeleton oil seal.

[0012] As a preferred technical solution of the present invention, a through groove is arranged inside the push rod guide sleeve, the dimension of the inner wall of the through groove is adapted to the outer surface dimension of the piston push rod, the piston push rod is movably connected to the push rod guide sleeve through the through groove, a sliding groove is arranged inside the skeleton oil seal, the piston push rod is movably connected to the skeleton oil seal through the sliding groove, a groove is arranged on the other side of the skeleton oil seal, and the skeleton oil seal is clamped to the push rod guide sleeve through the groove.

[0013] As a preferred technical solution of the present invention, a piston sleeve ring is arranged on the outside of the shock absorber valve system, the inner diameter dimension of the piston sleeve ring is adapted to the outer surface dimension of the shock absorber valve system, the outer diameter dimension of the piston sleeve ring is adapted to the dimension of the activity groove, and the shock absorber valve system is movably connected to the activity groove through the piston sleeve ring.

[0014] As a preferred technical solution of the present invention, two sets of positioning pads are provided, and the positioning pads are symmetrically arranged on both sides of the shock absorber body.

[0015] As a preferred technical solution of the present invention, it includes the following steps

[0016] Step 1: Symmetrically arrange the piston push rods on both sides of the shock absorber body. The piston push rods at both ends of the shock absorber can be lengthened as needed to meet the requirements.

[0017] Step 2: Adopt a structure with a skeleton oil seal closing at both ends of the shock absorber body, and fix the skeleton oil seal through a fixing block.

[0018] Step 3: Set a double valve system inside the shock absorber body. The piston push rod assemblies on both sides can slide through the shock absorber valve system in the internal moving groove of the shock absorber body.

[0019] Step 4: Place the shock absorber at the required installation position, install it through two groups of piston push rods, and fix it through positioning pads.

[0020] Step 5: During use, drive the piston push rods to slide in the internal moving groove of the shock absorber body through two groups of piston push rods for shock absorption. There is a stroke at both ends, the response is faster, and it can also have a transient response to larger vibrations.

[0021] Compared with the prior art, the present invention provides a double-rod single-tube shock absorber, which has the following beneficial effects: 1. For this double-rod single-tube shock absorber, two groups of movable piston assemblies are provided. The movable piston assemblies are symmetrically arranged on both sides of the nitrogen chamber. Nitrogen is filled inside the nitrogen chamber. The outer diameter of the movable piston assembly is adapted to the inner wall size of the shock absorber body. The movable piston assembly is movably connected to the inner wall of the shock absorber body, and the movable piston assembly moves inside the shock absorber body for shock absorption; two groups of piston push rod assemblies are provided. The piston push rod assemblies are symmetrically arranged. There is a moving groove inside the shock absorber body. The outer diameter of the shock absorber valve system is adapted to the inner wall size of the moving groove. One side of the piston push rod assembly is provided with a piston push rod. The piston push rod is movably connected to the inner wall of the moving groove through the shock absorber valve system. Two groups of shock absorber valve systems are also provided. The piston push rod assemblies on both sides can slide through the shock absorber valve system in the internal moving groove of the shock absorber body, so that there is a stroke at both ends of the shock absorber, the response is faster, and it can also have a transient response to larger vibrations.

[0022] 2. For this double-rod single-tube shock absorber, a sealing piston is provided on one side of the movable piston assembly, a positioning groove is provided on the other side of the movable piston assembly, a piston ring is provided on the outside of the sealing piston, a positioning block is provided on one side of the shock absorber valve system, the size of the positioning block is adapted to the size of the positioning groove, the shock absorber valve system is clamped with the positioning groove through the positioning block, the outer diameter of the piston ring is adapted to the inner wall size of the shock absorber body, and the movable piston assembly is movably connected to the shock absorber body through the piston ring. The stability of the shock absorber valve system moving in the moving groove is improved by the sealing piston and the outer piston ring. The unilateral piston moving stroke is smaller, the wear on the skeleton oil seal and the piston push rod is smaller, and the possibility of oil leakage is effectively reduced.

[0023] 3. For this double-rod single-tube shock absorber, a fixing block is provided on one side of the skeleton oil seal, a positioning slot is provided on the outside of the fixing block, a positioning block is provided inside the shock absorber body, the fixing block is clamped with the positioning block through the positioning slot, and the skeleton oil seal is clamped with the shock absorber body through the fixing block. A sealing block is provided on one side of the skeleton oil seal, and the skeleton oil seal is fixed by the fixing block. Both ends of the shock absorber body adopt the structure of the skeleton oil seal closing the opening, which is not affected by the unstable factors generated by welding in the process and effectively improves the problem that the welding slag in the cylinder affects the cleanliness. 4. For this double-rod single-tube shock absorber, a through groove is provided inside the push rod guide sleeve, and the size of the inner wall of the through groove is adapted to the outer surface size of the piston push rod. The piston push rod is movably connected with the push rod guide sleeve through the through groove. A sliding groove is provided inside the skeleton oil seal, and the piston push rod is movably connected with the skeleton oil seal through the sliding groove. A groove is provided on one side of the fixing block, and the skeleton oil seal is clamped with the push rod guide sleeve through the groove. The direction of the movement of the piston push rod assembly is guided through the through groove in the push rod guide sleeve, improving the damping stability of the device, and the push rod guide sleeve is fixed by the fixing block; the number of positioning pads is set to two groups, and the positioning pads are symmetrically arranged on both sides of the shock absorber body. The positioning pads corresponding to one side of the two piston push rods facilitate the quick installation, positioning and connection of the shock absorber. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 is a schematic diagram of the internal structure of the present invention;

[0025] Figure 2 is the present invention Figure 1 schematic diagram of a partial structure;

[0026] Figure 3 is the present invention Figure 1 schematic diagram of a partial structure;

[0027] Figure 4 is the present invention Figure 1 schematic diagram of a partial structure.

[0028] In the figure: 1. Shock absorber body; 101. Activity groove; 102. Positioning block; 2. Nitrogen chamber; 3. Activity piston assembly; 301. Sealing piston; 302. Positioning groove; 303. Piston ring; 4. Activity chamber; 5. Shock valve system; 501. Positioning block; 502. Piston sleeve ring; 6. Piston push rod assembly; 601. Piston push rod; 7. Push rod guide sleeve; 701. Through groove; 8. Skeleton oil seal; 801. Fixing block; 802. Sealing block; 803. Sliding groove; 804. Groove; 805. Positioning slot; 9. Positioning pad. DETAILED DESCRIPTION OF THE INVENTION

[0029] The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0030] Please refer to Figures 1-4 , in this embodiment: a double-rod single-tube shock absorber, including a shock absorber body 1, a nitrogen gas chamber 2 is arranged inside the shock absorber body 1 for arranging nitrogen gas inside, an active piston assembly 3 is arranged outside the nitrogen gas chamber 2 for moving inside the active chamber 4, an active chamber 4 is arranged outside the active piston assembly 3 for the active piston assembly 3 to move inside the active chamber 4, a piston push rod assembly 6 is arranged inside the active piston assembly 3 for shock absorption, a shock absorption valve system 5 is arranged on one side of the piston push rod assembly 6 for damping the piston push rod assembly 6, a push rod guide sleeve 7 is arranged on the other side of the piston push rod assembly 6 for guiding the movement of the piston push rod assembly 6, a skeleton oil seal 8 is arranged on one side of the push rod guide sleeve 7 for sealing the shock absorber body 1, and a positioning pad 9 is arranged outside the piston push rod assembly 6 for positioning during the installation of the device.

[0031] In this embodiment, two sets of movable piston assemblies 3 are provided. The movable piston assemblies 3 are symmetrically arranged on both sides of the nitrogen gas chamber 2. Nitrogen gas is filled inside the nitrogen gas chamber 2. The outer diameter dimension of the movable piston assembly 3 is set to be adapted to the inner wall dimension of the shock absorber body 1, and the movable piston assembly 3 is movably connected to the inner wall of the shock absorber body 1. In this way, the movable piston assembly 3 moves inside the shock absorber body 1 for shock absorption; two sets of piston push rod assemblies 6 are provided. The piston push rod assemblies 6 are symmetrically arranged. An activity groove 101 is provided inside the shock absorber body 1. The outer diameter dimension of the shock absorber valve system 5 is adapted to the inner wall dimension of the activity groove 101. A piston push rod 601 is provided on one side of the piston push rod assembly 6. The piston push rod 601 is movably connected to the inner wall of the activity groove 101 through the shock absorber valve system 5. Two sets of shock absorber valve systems 5 are also provided. In this way, the piston push rod assemblies 6 on both sides can slide through the shock absorber valve system 5 in the activity groove 101 inside the shock absorber body 1, so that there is a stroke at both ends of the shock absorber, the reaction is faster, and it can also respond transiently to larger vibrations; a sealing piston 301 is provided on one side of the movable piston assembly 3, and a positioning groove 302 is provided on the other side of the movable piston assembly 3. A piston ring 303 is provided on the outside of the sealing piston 301. A positioning block 501 is provided on one side of the shock absorber valve system 5. The dimension of the positioning block 501 is adapted to the dimension of the positioning groove 302. The shock absorber valve system 5 is clamped to the positioning groove 302 through the positioning block 501. The outer diameter dimension of the piston ring 303 is adapted to the inner wall dimension of the shock absorber body 1. The movable piston assembly 3 is movably connected to the shock absorber body 1 through the piston ring 303. In this way, the stability of the shock absorber valve system 5 moving in the activity groove 101 is improved through the sealing piston 301 and the outer piston ring 303; a fixing block 801 is provided on one side of the skeleton oil seal 8, and a positioning card slot 805 is provided on the outside of the fixing block 801. A positioning card block 102 is provided inside the shock absorber body 1. The fixing block 801 is clamped to the positioning card block 102 through the positioning card slot 805. The skeleton oil seal 8 is clamped to the shock absorber body 1 through the fixing block 801. A sealing block 802 is provided on one side of the skeleton oil seal 8. In this way, the skeleton oil seal 8 is fixed through the fixing block 801. The two ends of the shock absorber body 1 both adopt the structure of the skeleton oil seal 8 for closing the opening. The process is not affected by the unstable factors generated by welding, and the problem that the welding slag inside the cylinder affects the cleanliness is effectively improved; a through groove 701 is provided inside the push rod guide sleeve 7. The inner wall dimension of the through groove 701 is adapted to the outer surface dimension of the piston push rod 601. The piston push rod 601 is movably connected to the push rod guide sleeve 7 through the through groove 701. A sliding groove 803 is provided inside the skeleton oil seal 8. The piston push rod 601 is movably connected to the skeleton oil seal 8 through the sliding groove 803. A groove 804 is provided on one side of the fixing block 801. The skeleton oil seal 8 is clamped to the push rod guide sleeve 7 through the groove 804. In this way, the direction of the movement of the piston push rod assembly 6 is guided through the through groove 701 inside the push rod guide sleeve 7, and the stability of the shock absorption of the device is improved. The push rod guide sleeve 7 is fixed through the fixing block 801;A piston sleeve ring 502 is arranged outside the shock absorption valve system 5. The inner diameter dimension of the piston sleeve ring 502 is adapted to the outer surface dimension of the shock absorption valve system 5, and the outer diameter dimension of the piston sleeve ring 502 is adapted to the dimension of the movable groove 101. The shock absorption valve system 5 is movably connected to the movable groove 101 through the piston sleeve ring 502, and this setting improves the mobility of the shock absorption valve system 5 inside the movable groove 101; The number of positioning pads 9 is set to two groups, and the positioning pads 9 are symmetrically arranged on both sides of the shock absorber body 1. By setting the positioning pads 9 corresponding to one side of the two piston push rods 601 in this way, it is convenient for the quick installation positioning and connection of the shock absorber.;

[0032] Working principle and usage process of the present invention: During use, place the shock absorber at the position where it needs to be installed, install it through two sets of piston push rods 601, position and fix it through the positioning pad 9. And since the number of the movable piston assemblies 3 is set to two, the movable piston assemblies 3 are symmetrically arranged on both sides of the nitrogen gas chamber 2. The outer diameter dimension of the movable piston assembly 3 is adapted to the inner wall dimension of the shock absorber body 1, and the movable piston assembly 3 is movably connected to the inner wall of the shock absorber body 1. The movable piston assembly 3 moves inside the shock absorber body 1 to perform shock absorption; the number of the piston push rod assemblies 6 is set to two and is symmetrically arranged. An activity groove 101 is arranged inside the shock absorber body 1. The outer diameter dimension of the shock absorber valve system 5 is adapted to the inner wall dimension of the activity groove 101. One side of the piston push rod assembly 6 is provided with a piston push rod 601, and the piston push rod 601 is movably connected to the inner wall of the activity groove 101 through the shock absorber valve system 5. The number of the shock absorber valve systems 5 is also set to two. The piston push rod assemblies 6 on both sides can slide through the shock absorber valve systems 5 in the activity groove 101 inside the shock absorber body 1, so that both ends of the shock absorber have a stroke, the reaction is more rapid, and it can also have a transient response to larger vibrations; one side of the movable piston assembly 3 is provided with a sealing piston 301, the other side of the movable piston assembly 3 is provided with a positioning groove 302, a piston ring 303 is arranged outside the sealing piston 301, one side of the shock absorber valve system 5 is provided with a positioning block 501, the dimension of the positioning block 501 is adapted to the dimension of the positioning groove 302, and the shock absorber valve system 5 is clamped with the positioning groove 302 through the positioning block 501. The outer diameter dimension of the piston ring 303 is adapted to the inner wall dimension of the shock absorber body 1, and the movable piston assembly 3 is movably connected to the shock absorber body 1 through the piston ring 303. The stability of the shock absorber valve system 5 moving in the activity groove 101 is improved through the sealing piston 301 and the outer piston ring 303; the fixing block 801 is clamped with the positioning block 102 through the positioning card slot 805, the skeleton oil seal 8 is clamped with the shock absorber body 1 through the fixing block 801. One side of the skeleton oil seal 8 is provided with a sealing block 802. The skeleton oil seal 8 is fixed through the fixing block 801. Both ends of the shock absorber body 1 adopt a structure with the skeleton oil seal 8 closing the mouth. The process is not affected by the unstable factors generated by welding, and effectively improves the problem that the welding slag inside the cylinder affects the cleanliness; since the inner wall dimension of the through groove 701 is adapted to the outer surface dimension of the piston push rod 601, the piston push rod 601 is movably connected to the push rod guide sleeve 7 through the through groove 701. A sliding groove 803 is arranged inside the skeleton oil seal 8, and the piston push rod 601 is movably connected to the skeleton oil seal 8 through the sliding groove 803. One side of the fixing block 801 is provided with a groove 804, and the skeleton oil seal 8 is clamped with the push rod guide sleeve 7 through the groove 804. The direction of the movement of the piston push rod assembly 6 is guided through the through groove 701 inside the push rod guide sleeve 7 to improve the stability of the shock absorption of the device, and the push rod guide sleeve 7 is fixed through the fixing block 801;By making the inner diameter dimension of the piston sleeve ring 502 match the outer surface dimension of the shock absorption valve system 5, and the outer diameter dimension of the piston sleeve ring 502 match the dimension of the movable groove 101, the shock absorption valve system 5 is movably connected to the movable groove 101 through the piston sleeve ring 502, improving the mobility of the shock absorption valve system 5 inside the movable groove 101; there are two sets of positioning pads 9, which are symmetrically arranged on both sides of the shock absorber body 1. The positioning pads 9 corresponding to one side of the two piston push rods 601 facilitate the quick installation, positioning and connection of the shock absorber.;

[0033] Finally, it should be noted that the above are only the preferred embodiments of the present invention and are not used to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements on some of the technical features. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.;

Claims

1. Double-rod single-tube shock absorber, Characterized in that: It includes a shock absorber body (1), a nitrogen gas chamber (2) is arranged inside the shock absorber body (1), a movable piston assembly (3) is arranged outside the nitrogen gas chamber (2), a movable chamber (4) is arranged outside the movable piston assembly (3), a piston push rod assembly (6) is arranged inside the movable piston assembly (3), a shock absorption valve system (5) is arranged on one side of the piston push rod assembly (6), a push rod guide sleeve (7) is arranged on the other side of the piston push rod assembly (6), a skeleton oil seal (8) is arranged on one side of the push rod guide sleeve (7), and a positioning pad (9) is arranged outside the piston push rod assembly (6); The number of the piston push rod assemblies (6) is set to two groups, the piston push rod assemblies (6) are symmetrically arranged, an activity groove (101) is arranged inside the shock absorber body (1), the outer diameter size of the shock absorption valve system (5) is adapted to the inner wall size of the activity groove (101), a piston push rod (601) is arranged on one side of the piston push rod assembly (6), and the piston push rod (601) is movably connected to the inner wall of the activity groove (101) through the shock absorption valve system (5), and the number of the shock absorption valve systems (5) is also set to two groups; A sealing piston (301) is arranged on one side of the movable piston assembly (3), a positioning groove (302) is arranged on the other side of the movable piston assembly (3), a piston ring (303) is arranged outside the sealing piston (301), a positioning block (501) is arranged on one side of the shock absorption valve system (5), the size of the positioning block (501) is adapted to the size of the positioning groove (302), the shock absorption valve system (5) is clamped to the positioning groove (302) through the positioning block (501), the outer diameter size of the piston ring (303) is adapted to the inner wall size of the shock absorber body (1), and the movable piston assembly (3) is movably connected to the shock absorber body (1) through the piston ring (303); A piston sleeve ring (502) is arranged outside the shock absorption valve system (5), the inner diameter size of the piston sleeve ring (502) is adapted to the outer surface size of the shock absorption valve system (5), the outer diameter size of the piston sleeve ring (502) is adapted to the size of the activity groove (101), and the shock absorption valve system (5) is movably connected to the activity groove (101) through the piston sleeve ring (502).

2. The double-rod single-tube shock absorber according to claim 1, Characterized in that: The number of the movable piston assemblies (3) is set to two groups, the movable piston assemblies (3) are symmetrically arranged on both sides of the nitrogen gas chamber (2), and nitrogen gas is filled inside the nitrogen gas chamber (2).

3. The double-rod single-tube shock absorber according to claim 1, Characterized in that: The outer diameter size of the movable piston assembly (3) is adapted to the inner wall size of the shock absorber body (1), and the movable piston assembly (3) is movably connected to the inner wall of the shock absorber body (1).

4. The double-rod single-tube shock absorber according to claim 1, Characterized in that: On one side of the skeleton oil seal (8), there is a fixing block (801). On the outside of the fixing block (801), there is a positioning card slot (805). Inside the shock absorber body (1), there is a positioning card block (102). The fixing block (801) is clamped with the positioning card block (102) through the positioning card slot (805). The skeleton oil seal (8) is clamped with the shock absorber body (1) through the fixing block (801). On one side of the skeleton oil seal (8), there is a sealing block (802).

5. The double-rod single-tube shock absorber according to claim 1, characterized in that: Inside the push rod guide sleeve (7), there is a through groove (701). The size of the inner wall of the through groove (701) is adapted to the outer surface size of the piston push rod (601). The piston push rod (601) is movably connected with the push rod guide sleeve (7) through the through groove (701). Inside the skeleton oil seal (8), there is a sliding groove (803). The piston push rod (601) is movably connected with the skeleton oil seal (8) through the sliding groove (803). On the other side of the skeleton oil seal (8), there is a groove (804). The skeleton oil seal (8) is clamped with the push rod guide sleeve (7) through the groove (804).

6. The double-rod single-tube shock absorber according to claim 1, characterized in that: The number of the positioning pads (9) is set to two groups, and the positioning pads (9) are symmetrically arranged on both sides of the shock absorber body (1).

7. The double-rod single-tube shock absorber according to claim 1, characterized in that: The usage method includes the following steps: Step 1: The piston push rods (601) are symmetrically arranged on both sides of the shock absorber body (1). The piston push rods (601) at both ends of the shock absorber can be lengthened as needed to meet the requirements; Step 2: The structures with the skeleton oil seals (8) closing the openings are adopted at both ends of the shock absorber body (1), and the skeleton oil seals (8) are fixed through the fixing blocks (801); Step 3: A double-valve system is arranged inside the shock absorber body (1). The piston push rod assemblies (6) on both sides can slide through the shock absorber valve system (5) in the inner movable groove (101) of the shock absorber body (1); Step 4: Place the shock absorber at the required installation position, install it through the two groups of piston push rods (601), and perform positioning and fixing through the positioning pads (9); Step 5: During use, drive the piston push rods (601) to slide in the inner movable groove (101) of the shock absorber body (1) through the two groups of piston push rods (601) for shock absorption. There are strokes at both ends, the reaction is faster, and it can also have a transient response to larger vibrations.

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