High-sealing type nitrogen spring shock absorber

Abstract

The utility model discloses a high sealing type nitrogen spring shock absorber which comprises a cylinder body, a piston plate connected to the inner wall of the cylinder body in a sliding mode and a piston rod fixedly connected to the top of the piston plate, an installation ring plate is fixedly connected to the top of the cylinder body, and a first sealing ring attached to the outer side of the piston rod is embedded in the installation ring plate. A first sealing assembly is arranged in the mounting ring plate and located on one side of the first sealing ring. The first sealing assembly comprises a plurality of first movable rods evenly and slidably connected to the interior of the mounting ring plate, a plurality of pressing blocks fixedly connected to one ends of the first movable rods and attached to the first sealing ring, a plurality of pushing blocks fixedly connected to the other ends of the first movable rods, and a first elastic ring arranged in the mounting ring plate in a sleeved mode. By means of the structure, the first sealing assembly is arranged to be matched with the first sealing ring, and it is guaranteed that the piston rod keeps good sealing performance all the time when moving; and meanwhile, the sealing performance of the shock absorber is enhanced through the arranged second sealing ring, and the stable service life of the shock absorber can be easily kept.

Description

TECHNICAL FIELD

[0001] The utility model relates to shock absorber technical field, especially a high sealing type nitrogen spring shock absorber. BACKGROUND

[0002] The nitrogen spring shock absorber can provide efficient damping effect and stability, and realizes stable control of vibration through the built-in high-strength spring and nitrogen system. Nitrogen has good compressibility when under pressure, which can effectively disperse mechanical impact force and avoid the rebound problem caused by rigid shock absorbers under large impact force.

[0003] At present, the nitrogen spring shock absorber is sealed by the sealing ring, the sealing structure is single, and it is difficult to form an effective sealing barrier. Moreover, due to the continuous friction between the sealing ring and the piston rod, the sealing ring is prone to wear, which gradually reduces its sealing performance. Not only does it affect the sealing effect of the shock absorber, but also it reduces the overall durability and reliability of the product. Therefore, the utility model provides a high sealing type nitrogen spring shock absorber to solve the problems raised in the above background technology. SUMMARY

[0004] The utility model discloses a high sealing type nitrogen spring shock absorber, sets up first sealing assembly and first sealing ring cooperation, ensures that the piston rod always maintains good sealing performance when moving, and the second sealing ring arranged at the same time enhances the airtightness of the shock absorber, which helps to maintain the stable service life of the shock absorber.

[0005] To achieve the above object, a high sealing type nitrogen spring shock absorber is provided, which comprises a cylinder body, a piston plate slidingly connected to the inner wall of the cylinder body, and a piston rod fixedly connected to the top of the piston plate. The top of the cylinder body is fixedly connected with a mounting ring plate, the inside of the mounting ring plate is embedded with a first sealing ring matched with the outer side of the piston rod, and the inside of the mounting ring plate and one side of the first sealing ring are provided with a first sealing assembly.

[0006] The first sealing assembly comprises a plurality of first movable rods uniformly slidingly connected to the inside of the mounting ring plate, a plurality of pressing blocks fixedly connected to one end of the first movable rod and matched with the first sealing ring, a plurality of push blocks fixedly connected to the other end of the first movable rod, and a first elastic ring sleeved in the inside of the mounting ring plate, and the push block is matched with the first elastic ring.

[0007] The top of the cylinder body is provided with a second sealing assembly, the inside of the piston rod is provided with an adjusting assembly, and the bottom of the cylinder body is provided with a pressure relief assembly.

[0008] According to the high sealing type nitrogen spring shock absorber, the second sealing assembly comprises a conical seal connected to the top of the cylinder body and abutting against the outer side of the piston rod, a mounting frame fixedly connected to the top of the cylinder body and located above the conical seal, and a second elastic ring arranged between the mounting frame and the conical seal.

[0009] According to the high sealing type nitrogen spring shock absorber, the adjusting assembly comprises a cavity formed in the inner side of the piston rod, an adjusting piston slidingly connected to the inner wall of the cavity, and a lead screw threadedly connected to the inner side of the piston rod, wherein the bottom end of the lead screw is rotationally connected to the top of the adjusting piston.

[0010] According to the high sealing type nitrogen spring shock absorber, the pressure relief assembly comprises a second movable rod slidingly connected to the inner side of the cylinder body, a pressure plate fixedly connected to the top end of the second movable rod, a bottom plate fixedly connected to the bottom end of the second movable rod, a spring sleeved on the outer side of the second movable rod, and a plurality of pressure relief holes formed in the inner side of the cylinder body and located above the bottom plate.

[0011] According to the high sealing type nitrogen spring shock absorber, a plurality of groups of sealing protrusions are uniformly arranged on the side of the first sealing ring close to the piston rod, and the length of each group of sealing protrusions decreases in turn.

[0012] According to the high sealing type nitrogen spring shock absorber, the outer side of the piston plate is provided with a Y-shaped seal and a second sealing ring, and the outer side of the adjusting piston is also provided with a Y-shaped seal and a second sealing ring.

[0013] According to the high sealing type nitrogen spring shock absorber, the inner side of the mounting ring plate is also provided with a Y-shaped seal, and the top of the bottom plate and below the pressure relief holes is also provided with a second sealing ring.

[0014] According to the high sealing type nitrogen spring shock absorber, the top side of the lead screw is provided with an internal hexagonal groove, and the first elastic ring and the second elastic ring are both made of a rubber ring.

[0015] The utility model has the advantages of:

[0016] 1. Compared with the prior art, the first sealing assembly cooperates with the first sealing ring to enhance the sealing effect and ensure that the piston rod always maintains good sealing performance during movement; the second sealing ring is arranged at the same time to enhance the airtightness of the shock absorber and help maintain the stable service life of the shock absorber.

[0017] 2. Compared with the prior art, the adjusting assembly is arranged to facilitate adjustment of the stiffness and damping characteristics of the shock absorber according to the use requirements, and the use is flexible.

[0018] 3. Compared with the prior art, the pressure relief assembly can relieve pressure when the pressure in the cylinder body is too high, and the shock absorber can be prevented from being damaged due to excessive pressure by releasing the internal pressure. Attached Figure Description

[0019] The present invention will be further described below with reference to the accompanying drawings and embodiments;

[0020] Figure 1 This is a schematic cross-sectional view of the overall structure of a high-sealing nitrogen spring shock absorber according to this utility model;

[0021] Figure 2 This utility model relates to a high-sealing nitrogen spring shock absorber. Figure 1 Enlarged structural diagram at point A in the middle;

[0022] Figure 3 This utility model relates to a high-sealing nitrogen spring shock absorber. Figure 1 Enlarged structural diagram at point B;

[0023] Figure 4 This utility model relates to a high-sealing nitrogen spring shock absorber. Figure 1 Enlarged structural diagram at point C;

[0024] Figure 5 This utility model relates to a high-sealing nitrogen spring shock absorber. Figure 2 Enlarged structural diagram at point D.

[0025] Legend:

[0026] 1. Cylinder body; 2. Piston rod; 3. Piston plate; 4. Mounting ring plate; 5. First sealing ring; 6. First movable rod; 7. Pressure block; 8. Push block; 9. First elastic ring; 10. Sealing protrusion; 11. Y-shaped seal; 12. Second sealing ring; 13. Mounting bracket; 14. Second elastic ring; 15. Lead screw; 16. Adjusting piston; 17. Cavity; 18. Second movable rod; 19. Spring; 20. Base plate; 21. Pressure plate; 22. Pressure relief hole; 23. Conical seal. Detailed Implementation

[0027] This section will describe in detail the specific embodiments of the present utility model. The preferred embodiments of the present utility model are shown in the accompanying drawings. The purpose of the drawings is to supplement the textual description with graphics, so that people can intuitively and vividly understand each technical feature and the overall technical solution of the present utility model, but they should not be construed as limiting the scope of protection of the present utility model.

[0028] Reference Figures 1-5The utility model discloses an embodiment of a high sealing type nitrogen spring shock absorber, which comprises a cylinder body 1, a piston plate 3 slidably connected to the inner wall of the cylinder body 1 and a piston rod 2 fixedly connected to the top of the piston plate 3, a mounting ring plate 4 fixedly connected to the top of the cylinder body 1, a first sealing ring 5 embedded in the inside of the mounting ring plate 4 and adhered to the outside of the piston rod 2, a first sealing assembly provided on one side of the first sealing ring 5 in the inside of the mounting ring plate 4, the first sealing assembly comprising a plurality of first movable rods 6 uniformly slidably connected to the inside of the mounting ring plate 4, a plurality of pressing blocks 7 fixedly connected to one end of the first movable rods 6 and adhered to the first sealing ring 5, a plurality of push blocks 8 fixedly connected to the other end of the first movable rods 6 and a first elastic ring 9 sleeved in the inside of the mounting ring plate 4, and the push blocks 8 are adhered to the first elastic ring 9.

[0029] When the first sealing ring 5 is adhered to the outside of the piston rod 2 for sealing, the high elasticity of the first elastic ring 9 enables the push blocks 8 and the first movable rods 6 thereon to maintain stable support, so that the pressing blocks 7 can generate appropriate pressure deformation on the first sealing ring 5, the sealing effect is enhanced, the piston rod 2 can always maintain good sealing performance during movement, the airtightness of the shock absorber is enhanced, and the stable service life of the shock absorber is maintained.

[0030] The top of the cylinder body 1 is provided with a second sealing assembly, the second sealing assembly comprises a conical seal 23 connected to the top of the cylinder body 1 and adhered to the outside of the piston rod 2, a mounting frame 13 fixedly connected to the top of the cylinder body 1 and located above the conical seal 23, and a second elastic ring 14 provided between the mounting frame 13 and the conical seal 23, the first elastic ring 9 and the second elastic ring 14 are both made of rubber rings, have good high elasticity and viscoelasticity, and enable the elastic rings to have good compression performance.

[0031] When the conical seal 23 is adhered to the outside of the piston rod 2 for sealing, the contraction of the second elastic ring 14 enables the conical seal 23 to be tightly adhered to the outside of the piston rod 2, so as to further form a stable sealing barrier and improve the sealing performance of the shock absorber.

[0032] In order to adjust the performance of the shock absorber, the inside of the piston rod 2 is provided with an adjusting assembly, the adjusting assembly comprises a cavity 17 opened in the inside of the piston rod 2, an adjusting piston 16 slidably connected to the inner wall of the cavity 17 and a lead screw 15 threadedly connected to the inside of the piston rod 2, the bottom end of the lead screw 15 is rotationally connected to the top of the adjusting piston 16, and an internal hexagonal groove is formed in the top side of the lead screw 15.

[0033] By rotating the lead screw 15, the position of the adjusting piston 16 in the cavity 17 can be adjusted, so as to change the size of the air chamber in the shock absorber, so as to adjust the stiffness and damping characteristics of the shock absorber according to the use requirements, and the use is flexible.

[0034] The bottom of the cylinder body 1 is provided with a pressure relief assembly, which comprises a second movable rod 18 slidingly connected to the inside of the cylinder body 1, a pressure plate 21 fixedly connected to the top end of the second movable rod 18, a bottom plate 20 fixedly connected to the bottom end of the second movable rod 18, a spring 19 sleeved on the outside of the second movable rod 18, and a plurality of pressure relief holes 22 opened in the inside of the cylinder body 1 and located above the bottom plate 20.

[0035] When the air chamber pressure at the bottom of the piston plate 3 is too large, the pressure plate 21 will move downward under the action of the pressure, so that the pressure relief holes 22 are opened, thereby releasing the internal pressure and preventing the shock absorber from being damaged due to excessive pressure.

[0036] The first sealing ring 5 is uniformly provided with a plurality of groups of sealing protrusions 10 near one side of the piston rod 2, and the length of each group of sealing protrusions 10 decreases in turn.

[0037] The length of each group of sealing protrusions 10 decreases in turn, forming a layer-by-layer sealing effect, and when the longer sealing protrusions 10 seal, the shorter sealing protrusions 10 can avoid sliding friction with the piston rod 2, so that after the longer sealing protrusions 10 wear out, they are recycled to the shorter sealing protrusions 10 to play the role of a sealing barrier, which is beneficial to ensuring stable sealing effect.

[0038] In order to further improve the sealing effect, the outside of the piston plate 3 is provided with a Y-shaped seal 11 and a second sealing ring 12, and the outside of the adjusting piston 16 is also provided with a Y-shaped seal 11 and a second sealing ring 12 to provide better sealing protection. The inside of the mounting ring plate 4 is also provided with a Y-shaped seal 11, and the top of the bottom plate 20 and below the pressure relief hole 22 is also provided with a second sealing ring 12 to ensure the sealing performance of the pressure relief hole 22.

[0039] Working principle: when the first sealing ring 5 is in contact with the outside of the piston rod 2 for sealing, the high elasticity of the first elastic ring 9 enables the push block 8 and the first movable rod 6 thereon to maintain stable support, so that the pressure block 7 can deform the first sealing ring 5 with appropriate pressure, thereby enhancing the sealing effect and ensuring that the piston rod 2 always maintains good sealing performance during movement, thereby enhancing the airtightness of the shock absorber and helping to maintain the stable service life of the shock absorber;

[0040] And when the conical seal 23 is in contact with the outside of the piston rod 2 for sealing, the contraction of the second elastic ring 14 can make the conical seal 23 tightly contact the outside of the piston rod 2, thereby further forming a stable sealing barrier and improving the sealing performance of the shock absorber;

[0041] Then, by rotating the lead screw 15, the position of the adjusting piston 16 in the cavity 17 can be adjusted, thereby changing the size of the air chamber inside the shock absorber, so as to adjust the stiffness and damping characteristics of the shock absorber according to the use requirements, and the use is flexible;

[0042] In use, when the air chamber at the bottom of the piston plate 3 is too large, the pressing plate 21 will move downward under the action of the pressure, so that the pressure relief hole 22 is opened, thereby releasing the internal pressure, preventing the shock absorber from being damaged due to excessive pressure.

[0043] The utility model embodiment has been described in detail above in combination with the drawings, but the utility model is not limited to the above-mentioned embodiments, and various changes can be made within the knowledge range possessed by ordinary skilled persons in the technical field without departing from the purpose of the utility model.

Claims

1. A high seal type nitrogen gas spring damper characterized by, The utility model provides a piston rod sealing device, including cylinder (1), piston plate (3) of sliding connection on the inner wall of cylinder (1) and piston rod (2) of fixed connection on the top of piston plate (3), cylinder (1) top is fixedly connected with the installation ring plate (4), the inside of installation ring plate (4) is embedded with the first sealing ring (5) of being pasted with piston rod (2) outside, the inside of installation ring plate (4) and located one side of first sealing ring (5) is equipped with first sealing assembly, The first sealing assembly includes a plurality of first movable rods (6) uniformly slidingly connected to the inside of the installation ring plate (4), a plurality of pressing blocks (7) fixedly connected to one end of the first movable rods (6) and pasted with the first sealing ring (5), a plurality of push blocks (8) fixedly connected to the other end of the first movable rods (6), and a first elastic ring (9) sleeved in the inside of the installation ring plate (4), the push blocks (8) are pasted with the first elastic ring (9). The top of the cylinder (1) is provided with a second sealing assembly, the inside of the piston rod (2) is provided with an adjusting assembly, and the bottom of the cylinder (1) is provided with a pressure relief assembly.

2. The high seal type nitrogen gas spring damper according to claim 1, wherein The second sealing assembly includes a conical seal (23) connected to the top of the cylinder (1) and pasted with the outside of the piston rod (2), a mounting bracket (13) fixedly connected to the top of the cylinder (1) and located above the conical seal (23), and a second elastic ring (14) arranged between the mounting bracket (13) and the conical seal (23).

3. The high seal type nitrogen gas spring damper according to claim 2, wherein The adjusting assembly includes a cavity (17) opened in the inside of the piston rod (2), an adjusting piston (16) slidingly connected to the inner wall of the cavity (17), and a lead screw (15) threadedly connected to the inside of the piston rod (2), the bottom end of the lead screw (15) is rotationally connected with the top of the adjusting piston (16).

4. The high seal type nitrogen gas spring damper according to claim 3, wherein The pressure relief assembly includes a second movable rod (18) slidingly connected to the inside of the cylinder (1), a pressing plate (21) fixedly connected to the top end of the second movable rod (18), a bottom plate (20) fixedly connected to the bottom end of the second movable rod (18), a spring (19) sleeved outside the second movable rod (18), and a plurality of pressure relief holes (22) opened in the inside of the cylinder (1) and located above the bottom plate (20).

5. The high seal type nitrogen gas spring damper according to claim 4, wherein A plurality of sealing protrusions (10) are uniformly arranged on one side of the first sealing ring (5) close to the piston rod (2), and the length of each group of sealing protrusions (10) decreases in turn.

6. The high seal type nitrogen gas spring damper according to claim 3, wherein The outside of the piston plate (3) is provided with a Y-shaped seal (11) and a second sealing ring (12), and the outside of the adjusting piston (16) is also provided with a Y-shaped seal (11) and a second sealing ring (12).

7. The high seal type nitrogen gas spring damper according to claim 4, wherein The inside of the installation ring plate (4) is also provided with a Y-shaped seal (11), and the top of the bottom plate (20) and below the pressure relief hole (22) is also provided with a second sealing ring (12).

8. The high seal type nitrogen gas spring damper according to claim 3, wherein The top side of the lead screw (15) is provided with an internal hexagonal recess, and the first elastic ring (9) and the second elastic ring (14) are both made of a rubber ring.

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