A novel nitrogen spring

Abstract

A novel nitrogen spring comprises a cylinder, a piston rod, a sealing structure, and a wear-resistant structure. The cylinder has an elastic groove, and one end of the piston rod is movably disposed within the elastic groove. The sealing structure and the wear-resistant structure are disposed between the cylinder and the piston rod, and both are in contact with the piston rod and the inner wall of the cylinder. The wear-resistant structure includes a connecting unit and an auxiliary unit. The connecting unit is disposed between the elastic groove and the piston rod, providing a transmission connection between them. The auxiliary unit is disposed on the connecting unit and assists in the movement of the piston rod, reducing wear between the piston rod and the cylinder. This design, by incorporating the sealing and wear-resistant structures, effectively prevents gas leakage during use and significantly reduces wear between the piston rod and the cylinder, thereby extending the service life of the nitrogen spring.

Description

Technical Field

[0001] This utility model relates to the field of nitrogen springs, and specifically to a novel nitrogen spring. Background Technology

[0002] Nitrogen springs are a new type of elastic element that uses high-pressure nitrogen as the working medium. Due to their excellent properties such as small size, large elastic force, long working stroke, no need for pre-tightening, and flexible installation, they have gradually replaced conventional elastic elements such as metal springs, elastic rubber, and air cushions in many fields. This replacement is particularly thorough and obvious in the mold industry.

[0003] However, existing nitrogen springs have problems such as unstable sealing structure and significant wear during use. Summary of the Invention

[0004] In view of this, the present invention provides a novel nitrogen spring.

[0005] To achieve the above objectives, this utility model provides the following technical solution:

[0006] A novel nitrogen spring includes a cylinder, a piston rod, a sealing structure, and a wear-resistant structure. The cylinder has an elastic groove, and one end of the piston rod is movably disposed within the elastic groove. The sealing structure and the wear-resistant structure are disposed between the cylinder and the piston rod, and both are in contact with the piston rod and the inner wall of the cylinder. The wear-resistant structure includes a connecting unit and an auxiliary unit. The connecting unit is disposed between the elastic groove and the piston rod, providing a transmission connection between them. The auxiliary unit is disposed on the connecting unit and assists in the movement of the piston rod, reducing wear between the piston rod and the cylinder.

[0007] Preferably, the connecting unit includes a fixing block and a connecting rod. The fixing block is fixedly connected to the side wall of the piston rod. A connecting hole is provided on the fixing block. One end of the connecting rod passes through the connecting hole and is connected to the top wall of the elastic groove. The other end of the connecting rod is connected to the bottom wall of the elastic groove. The auxiliary unit includes a connecting spring. The connecting spring is disposed on the outside of the connecting rod. One end of the connecting spring is connected to the fixing block. The other end of the connecting spring is connected to the bottom wall of the elastic groove.

[0008] Preferably, the sealing structure includes a sealing cover and a sealing ring. The sealing cover is detachably fixed on the cylinder body. The sealing cover has an annular structure and a shaft hole corresponding to the piston rod diameter. The end of the piston rod away from the elastic groove passes through the shaft hole for connection. The sealing cover has a U-shaped cross-section. A sealing element is provided between the sealing cover and the piston rod. The sealing element has an annular structure.

[0009] Preferably, a sealing ring groove is formed on the inner wall of the cylinder, the sealing ring is disposed in the sealing ring groove, the inner ring side of the sealing ring extends out of the sealing ring groove and connects with the piston rod, and the sealing ring and the inner wall of the sealing ring groove are interference fit.

[0010] Preferably, a gas passage is provided at the bottom of the cylinder body, one end of the gas passage is connected to the bottom wall of the elastic groove, and a high-pressure seal is provided at the other end of the gas passage. The high-pressure seal includes a high-pressure valve for releasing gas, a sealing gasket located outside the high-pressure valve, and a nut for fixing the sealing gasket and the high-pressure valve.

[0011] Preferably, an inner dustproof ring and an outer dustproof ring are provided between the sealing cover and the cylinder body, and the inner dustproof ring and the outer dustproof ring are arranged sequentially in a direction away from the piston hole.

[0012] Preferably, the bottom of the cylinder is provided with mounting holes.

[0013] The beneficial effects of this utility model are as follows: By incorporating a sealing structure and a wear-resistant structure, this design effectively prevents gas leakage during the nitrogen spring's operation and significantly reduces wear between the piston rod and the cylinder, thereby extending the nitrogen spring's service life. The sealing structure design, especially the combination of the sealing cap and sealing ring, ensures the airtightness of the gas passage, preventing high-pressure nitrogen leakage during spring operation and guaranteeing the spring's stability and reliability. The connecting and auxiliary units in the wear-resistant structure not only achieve stable transmission between the piston rod and the cylinder but also provide auxiliary support during piston rod movement, further reducing wear and extending the nitrogen spring's service life. Attached Figure Description

[0014] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0015] Appendix Figure 1 This is a cross-sectional view of the nitrogen spring in this utility model;

[0016] Appendix Figure 2 This is a schematic diagram of the structure of the nitrogen spring in this utility model;

[0017] Appendix Figure 3 This is a schematic diagram of the nitrogen spring in this utility model from another angle;

[0018] Appendix Figure 4This is a schematic diagram of the sealing cap in this utility model.

[0019] Figure label:

[0020] 1. Cylinder block; 2. Piston rod; 3. Sealing structure; 4. Wear-resistant structure; 5. Elastic groove; 6. Connecting unit; 7. Auxiliary unit; 8. Fixing block; 9. Connecting rod; 10. Connecting hole; 11. Connecting spring; 13. Sealing cover; 14. Sealing ring; 15. Shaft hole; 16. Seal; 17. Gas passage; 18. High-pressure seal; 19. High-pressure valve; 20. Sealing gasket; 21. Nut; 22. Inner dustproof ring; 23. Outer dustproof ring; 24. Mounting hole; 25. Sealing ring groove. Detailed Implementation

[0021] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0022] The present invention will now be further described with reference to the accompanying drawings.

[0023] This utility model provides the following technical solution:

[0024] As attached Figure 1-4As shown, a novel nitrogen spring includes a cylinder 1, a piston rod 2, a sealing structure 3, and a wear-resistant structure 4. The cylinder 1 has an elastic groove 5. One end of the piston rod 2 is movably disposed within the elastic groove 5. The sealing structure 3 and the wear-resistant structure 4 are disposed between the cylinder 1 and the piston rod 2, and both are in contact with the piston rod 2 and the inner wall of the cylinder 1. The wear-resistant structure 4 includes a connecting unit 6 and an auxiliary unit 7. The connecting unit 6 is disposed between the elastic groove 5 and the piston rod 2, providing a transmission connection between them. The auxiliary unit 7 is disposed on the connecting unit 6, assisting the piston rod 2 during movement and reducing wear between the piston rod 2 and the cylinder 1. In this embodiment, the sealing structure 3 and the wear-resistant structure 4 enhance the sealing and wear resistance of the nitrogen spring, thereby improving its service life. Specifically, the sealing structure 3 effectively prevents gas leakage, ensuring the stability and reliability of the nitrogen spring; the wear-resistant structure 4 reduces friction between the piston rod 2 and the cylinder 1, lowering wear and further extending the service life of the nitrogen spring. The combined use of the sealing structure 3 and the wear-resistant structure 4 allows the nitrogen spring to maintain good performance even under harsh conditions such as high pressure and high speed. The connecting unit 6 connects the elastic groove 5 and the piston rod 2, ensuring stable reciprocating movement of the piston rod 2 within the elastic groove 5. The design of the connecting unit 6 makes the connection between the piston rod 2 and the elastic groove 5 more robust, capable of withstanding greater pressure and impact, thereby improving the load-bearing capacity and stability of the nitrogen spring. Simultaneously, the connecting unit 6 also possesses a certain degree of elasticity, adapting to minor deformations of the piston rod 2 during movement, further ensuring the working performance of the nitrogen spring. The auxiliary unit 7 provides auxiliary support during the movement of the piston rod 2, ensuring smoother and more stable movement. Specifically, the auxiliary unit 7 reduces direct contact between the piston rod 2 and the cylinder 1, thereby reducing friction and wear. Furthermore, the auxiliary unit 7 also provides a certain degree of buffering, absorbing the impact and vibration generated during the movement of the piston rod 2, further protecting the various components of the nitrogen spring. Through the combined use of the auxiliary unit 7, the nitrogen spring maintains good working performance and stability even after long-term use. In summary, the nitrogen spring of this invention, through the combined use of the sealing structure 3, the wear-resistant structure 4, the connecting unit 6, and the auxiliary unit 7, achieves the goals of enhanced sealing, improved wear resistance, and guaranteed stability and reliability, thereby improving the service life and working performance of the nitrogen spring.

[0025] Furthermore, the connecting unit 6 includes a fixing block 8 and a connecting rod 9. The fixing block 8 is fixedly connected to the side wall of the piston rod 2. The fixing block 8 has a connecting hole 10. One end of the connecting rod 9 passes through the connecting hole 10 and connects to the top wall of the elastic groove 5, and the other end of the connecting rod 9 connects to the bottom wall of the elastic groove 5. The auxiliary unit 7 includes a connecting spring 11, which is located outside the connecting rod 9. One end of the connecting spring 11 is connected to the fixing block 8, and the other end of the connecting spring 11 is connected to the bottom wall of the elastic groove 5. The function of the fixing block 8 is to fix the piston rod 2, ensuring that the piston rod 2 can move stably without deviation during movement. The design of the fixing block 8 takes into account the lateral force that may be generated when the piston rod 2 reciprocates. By increasing the contact area between the fixing block 8 and the side wall of the piston rod 2, the stability of the connection is improved. At the same time, the fixing block 8 is made of high-strength material, which can withstand greater pressure and impact, thereby ensuring the stability of the nitrogen spring under harsh working conditions. In addition, a connecting hole 10 is provided on the fixing block 8 for connecting with the connecting rod 9. The diameter of the connecting hole 10 corresponds to the diameter of the connecting rod 9, ensuring that the connecting rod 9 can accurately pass through the connecting hole 10 and connect with the top and bottom walls of the elastic groove 5, further improving the load-bearing capacity of the nitrogen spring. In this embodiment, the auxiliary unit 7 provides auxiliary support when the piston rod 2 moves, ensuring that the movement of the piston rod 2 is more stable and smooth, while absorbing impact and vibration, and protecting the various components of the nitrogen spring. Specifically, the connecting spring 11 is located on the outside of the connecting rod 9, and its function is to provide a certain elastic support, so that the piston rod 2 can better adapt to the small deformation of the elastic groove 5 during the movement, ensuring the stability and reliability of the connection. One end of the connecting spring 11 is connected to the fixing block 8, and the other end is connected to the bottom wall of the elastic groove 5. This design allows the connecting spring 11 to play a buffering role when the piston rod 2 moves, absorbing some of the impact and vibration, thereby protecting the various components of the nitrogen spring from damage. By using the connecting spring 11, the auxiliary unit 7 can better play its role in the nitrogen spring, further improving the service life and working performance of the nitrogen spring.

[0026] Furthermore, the sealing structure 3 includes a sealing cover 13 and a sealing ring 14. The sealing cover 13 is detachably fixed to the cylinder body 1. The sealing cover 13 has an annular structure and a shaft hole 15 corresponding to the diameter of the piston rod 2. The end of the piston rod 2 away from the elastic groove 5 passes through the shaft hole 15 for connection. The sealing cover 13 has a U-shaped cross-section. A sealing element 16, also an annular structure, is located between the sealing cover 13 and the piston rod 2. In this embodiment, the sealing structure 3 serves to prevent gas leakage and ensure the stability and reliability of the nitrogen spring. Specifically, the detachable and fixed sealing cover 13 is convenient for maintenance and replacement of the nitrogen spring. The annular structure of the sealing cover 13 allows for a tight fit with the cylinder body 1, forming an effective sealing structure. The sealing cover 13 has a shaft hole 15 corresponding to the diameter of the piston rod 2. The end of the piston rod 2 away from the elastic groove 5 passes through the shaft hole 15 for connection. This design ensures that the piston rod 2 will not interfere with the sealing cover 13 during movement, guaranteeing the normal operation of the nitrogen spring. Simultaneously, the sealing cover 13 has a U-shaped cross-section, increasing the contact area between the sealing cover 13 and the cylinder 1, improving the reliability of the seal. Furthermore, the sealing structure 3 includes a sealing ring 14, which is disposed within the sealing ring groove and has an interference fit with it, ensuring a tight fit and preventing gas leakage from the sealing ring groove. One end of the sealing ring 14 extends out of the sealing ring groove and connects to the piston rod 2. This design further increases the reliability of the seal, ensuring that the nitrogen spring maintains good sealing performance under harsh conditions such as high pressure and high speed. In summary, this utility model, through the optimized design of the sealing structure 3, achieves enhanced sealing performance, thereby improving the stability and reliability of the nitrogen spring.

[0027] Furthermore, a sealing ring groove 25 is formed on the inner wall of the cylinder body 1, and the sealing ring 14 is disposed in the sealing ring groove 25. The inner ring side of the sealing ring 14 extends out of the sealing ring groove 25 and connects with the piston rod 2. The sealing ring 14 and the inner wall of the sealing ring groove 25 are interference-fitted. In this embodiment, the function of the sealing ring 14 and the sealing ring groove 25 is to further enhance the sealing effect and ensure that the nitrogen spring will not leak gas under high pressure. Specifically, the sealing ring groove 25 formed on the cylinder body 1 is opened towards the piston rod 2. This design allows the sealing ring 14 to fit tightly in the sealing ring groove 25, forming an effective sealing structure. The sealing ring 14 and the sealing ring groove 25 are interference-fitted, that is, the size of the sealing ring 14 is slightly larger than the size of the sealing ring groove 25. During installation, the sealing ring 14 needs to be pressed into the sealing ring groove 25 with force so that the sealing ring 14 can fit tightly against the wall of the sealing ring groove 25, thereby preventing gas from leaking from the sealing ring groove 25 and ensuring the stability and reliability of the nitrogen spring. By optimizing the design of the sealing ring 14 and the sealing ring groove 25, the nitrogen spring of this invention has significantly improved its sealing performance, enabling it to better adapt to harsh working conditions such as high pressure and high speed, and improving the service life and working performance of the nitrogen spring.

[0028] Furthermore, a gas channel 17 is provided at the bottom of the cylinder body 1. One end of the gas channel 17 is connected to the bottom wall of the elastic groove 5, and the other end of the gas channel 17 is provided with a high-pressure seal 18. The high-pressure seal 18 includes a high-pressure gas valve 19 for releasing gas, a sealing gasket 20 disposed on the outside of the high-pressure gas valve 19, and a nut 21 for fixing the sealing gasket 20 and the high-pressure gas valve 19. In this embodiment, the function of the high-pressure seal 18 is to seal the gas channel 17 to prevent gas leakage and ensure the stability and reliability of the nitrogen spring. Specifically, the high-pressure gas valve 19 is used to control the release of gas to realize the extension and contraction function of the nitrogen spring. The design of the high-pressure gas valve 19 takes into account the characteristics of high-pressure gas and the working requirements of the nitrogen spring, and can withstand large pressure and impact force to ensure the normal operation of the nitrogen spring under harsh working conditions. At the same time, a sealing gasket 20 is disposed on the outside of the high-pressure gas valve 19, and the sealing gasket 20 forms a tight fit with the high-pressure gas valve 19 and the cylinder body 1 to prevent gas leakage from the high-pressure gas valve 19. To further improve the reliability of the seal, a nut 21 is provided to secure the sealing gasket 20 and the high-pressure valve 19, ensuring that the high-pressure seal 18 will not loosen or fall off during long-term use. Through the design and use of the high-pressure seal 18, the nitrogen spring can maintain good sealing performance even under harsh conditions such as high pressure and high speed, thereby improving the service life and working performance of the nitrogen spring.

[0029] Furthermore, an inner dustproof ring 22 and an outer dustproof ring 23 are provided between the sealing cover 13 and the cylinder body 1, and the inner dustproof ring 22 and the outer dustproof ring 23 are arranged sequentially in a direction away from the piston rod 2. The function of the inner dustproof ring 22 and the outer dustproof ring 23 is to prevent dust and impurities from entering the interior of the nitrogen spring, ensuring the cleanliness and working performance of the nitrogen spring. The outer dustproof ring 23 is located close to the cylinder body 1, which can effectively block dust and impurities entering from the outside of the cylinder body 1, while the inner dustproof ring 22 is located above the outer dustproof ring 23, further blocking the entry of dust and impurities. The combined use of the inner dustproof ring 22 and the outer dustproof ring 23 forms an effective dustproof structure, allowing the nitrogen spring to maintain good working performance even in harsh environments. At the same time, both the inner dustproof ring 22 and the outer dustproof ring 23 are made of wear-resistant and corrosion-resistant materials, which can withstand greater friction and impact forces, ensuring the stability and reliability of the dustproof structure. By setting an inner dustproof ring 22 and an outer dustproof ring 23, the nitrogen spring of this utility model further improves its service life and working performance.

[0030] Furthermore, a mounting hole 24 is provided at the bottom of the cylinder body 1. In this embodiment, the mounting hole 24 facilitates the installation and fixing of the nitrogen spring. Specifically, the mounting hole 24 is located at the bottom of the cylinder body 1, allowing connection with external mounting components to ensure the nitrogen spring can be stably fixed in the required position during use. The design of the mounting hole 24 takes into account the installation requirements and working environment of the nitrogen spring, employing a suitable hole diameter and position to simplify and expedite the installation process. Simultaneously, the mounting hole 24 also possesses sufficient strength and rigidity to withstand the forces and vibrations generated by the nitrogen spring during operation, ensuring the stability and reliability of the nitrogen spring. By providing the mounting hole 24, the nitrogen spring of this invention is easier to install and use, improving its practicality and application range.

[0031] The above description of the disclosed embodiments enables those skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A novel nitrogen spring, comprising a cylinder, a piston rod, a sealing structure, and a wear-resistant structure, wherein the cylinder has an elastic groove, one end of the piston rod is movably disposed within the elastic groove, and the sealing structure and the wear-resistant structure are disposed between the cylinder and the piston rod, both the sealing structure and the wear-resistant structure being in contact with the piston rod and the inner wall of the cylinder, characterized in that: The wear-resistant structure includes a connecting unit and an auxiliary unit. The connecting unit is disposed between the elastic groove and the piston rod, and the connecting unit provides a transmission connection between the elastic groove and the piston rod. The auxiliary unit is disposed on the connecting unit and assists in the movement of the piston rod to reduce wear between the piston rod and the cylinder.

2. The novel nitrogen spring according to claim 1, characterized in that: The connecting unit includes a fixing block and a connecting rod. The fixing block is fixedly connected to the side wall of the piston rod. A connecting hole is provided on the fixing block. One end of the connecting rod passes through the connecting hole and is connected to the top wall of the elastic groove. The other end of the connecting rod is connected to the bottom wall of the elastic groove. The auxiliary unit includes a connecting spring. The connecting spring is disposed on the outside of the connecting rod. One end of the connecting spring is connected to the fixing block. The other end of the connecting spring is connected to the bottom wall of the elastic groove.

3. A novel nitrogen spring according to claim 1, characterized in that: The sealing structure includes a sealing cover and a sealing ring. The sealing cover is detachably fixed on the cylinder body. The sealing cover has an annular structure and a shaft hole corresponding to the piston rod diameter. The end of the piston rod away from the elastic groove passes through the shaft hole for connection. The sealing cover has a U-shaped cross-section. A sealing element is provided between the sealing cover and the piston rod. The sealing element has an annular structure.

4. A novel nitrogen spring according to claim 3, characterized in that: A sealing ring groove is formed on the inner wall of the cylinder, and the sealing ring is set in the sealing ring groove. The inner ring side of the sealing ring extends out of the sealing ring groove and connects with the piston rod. The sealing ring and the inner wall of the sealing ring groove are interference fit.

5. A novel nitrogen spring according to claim 4, characterized in that: A gas passage is provided at the bottom of the cylinder body. One end of the gas passage is connected to the bottom wall of the elastic groove, and the other end of the gas passage is provided with a high-pressure seal. The high-pressure seal includes a high-pressure valve for releasing gas, a sealing gasket located outside the high-pressure valve, and a nut for fixing the sealing gasket and the high-pressure valve.

6. A novel nitrogen spring according to claim 3, characterized in that: An inner dustproof ring and an outer dustproof ring are also provided between the sealing cover and the cylinder body, and the inner dustproof ring and the outer dustproof ring are arranged sequentially in a direction away from the piston rod.

7. A novel nitrogen spring according to claim 5, characterized in that: The bottom of the cylinder is provided with mounting holes.

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