Nitrogen spring capable of automatically relieving pressure

Abstract

The utility model discloses a nitrogen spring capable of automatically relieving pressure, which relates to the technical field of nitrogen springs and comprises a cylinder body, the outer surface of the bottom end of the cylinder body is detachably connected with a base, a piston rod is arranged in the middle of the cylinder body, an auxiliary ring is arranged on the outer wall of the piston rod, and a protective rubber ring is arranged between the auxiliary ring and the piston rod. A guide rail is arranged on the outer wall of the cylinder body. According to the nitrogen spring capable of automatically relieving pressure, when the piston rod is pressed, the auxiliary ring moves downwards along with the piston rod, and when the auxiliary ring moves downwards, the connecting plate on the outer wall of the auxiliary ring also moves downwards and presses the carrier plate downwards, so that the carrier plate compresses the limiting spring; when the piston rod is used, the pressure relief sensor can be triggered, the pressure relief sensor can control the pressure relief electromagnetic valve to be opened for pressure relief, over-travel use of the piston rod can be avoided, the situation of cylinder explosion can be avoided, and safety is high.

Description

A nitrogen spring with automatic pressure relief Technical Field

[0001] This utility model relates to the field of nitrogen spring technology, specifically to a nitrogen spring with automatic pressure relief. Background Technology

[0002] Nitrogen springs, also known as nitrogen suspension springs, use gas as the working medium. Utilizing the compressibility of nitrogen, they convert compression displacement into output force under the action of nitrogen. They are elastic components that use high-pressure nitrogen as the working medium and are mainly used in mold design. They do not require pre-tightening, have a smooth elasticity curve, simplify mold design and manufacturing processes, facilitate mold installation and adjustment, and ensure stable product quality. However, existing nitrogen springs have certain drawbacks in use.

[0003] First, existing nitrogen springs are prone to overtravel when the pressure is high. Overtravel causes the piston rod of the nitrogen spring to separate from the cylinder, resulting in low safety during use. Furthermore, the nitrogen spring cannot automatically release pressure to ensure its safety when overtravel occurs.

[0004] Secondly, after prolonged use, the piston rod inside the existing nitrogen spring is prone to wear at the end. During subsequent use, the piston rod is prone to lateral stress, which can cause the piston rod to bend and the internal sealing structure to deform.

[0005] Therefore, we propose a nitrogen spring with automatic pressure relief. Summary of the Invention

[0006] The main objective of this invention is to provide a nitrogen spring that can automatically depressurize, which can effectively solve the problems in the background art.

[0007] To achieve the above objectives, the technical solution adopted by this utility model is as follows:

[0008] An automatically depressurizing nitrogen spring includes a cylinder body. A base is detachably connected to the bottom outer surface of the cylinder body. A piston rod is disposed in the middle of the cylinder body. An auxiliary ring is disposed on the outer wall of the piston rod. A protective rubber ring is disposed between the auxiliary ring and the piston rod. A guide rail is disposed on the outer wall of the cylinder body. A connecting plate is fixedly connected to the outer wall of the auxiliary ring. An air injection valve and a pressure relief solenoid valve are disposed on the outer wall of the base. The air injection valve is located on one side of the pressure relief solenoid valve. A carrier plate is disposed in the middle of the guide rail. A limit spring is disposed between the carrier plate and the guide rail. A pressure relief sensor is detachably connected to the outer surface of one side of the guide rail.

[0009] Preferably, a dustproof rubber ring is provided between the cylinder body and the piston rod, a piston cylinder is provided on the outer wall of the piston rod, a retaining spring is provided between the piston cylinder and the cylinder body, a sealing element is provided on the outer wall of the piston cylinder, and an air nozzle is provided on the inner surface of the bottom end of the cylinder body.

[0010] Preferably, an anti-wear plate is provided above the auxiliary ring, an internal groove is provided in the middle of the auxiliary ring, a rubber column is provided on the lower outer surface of the anti-wear plate, and an airbag is provided in the middle of the internal groove.

[0011] Preferably, the carrier plate is movably connected to the guide rail via a limiting spring, and the lower outer surface of the connecting plate is connected to the upper outer surface of the carrier plate.

[0012] Preferably, the pressure relief sensor is electrically connected to the pressure relief solenoid valve, and the number of guide rails is two sets.

[0013] Preferably, the abrasion-resistant pad and the rubber column are integrally formed, and the outer surface of the bottom end of the rubber column is connected to the outer surface of the top end of the airbag cushion.

[0014] Compared with the prior art, the present invention has the following beneficial effects:

[0015] When the piston rod is compressed, the auxiliary ring moves downwards along with it. During this downward movement, the connecting plate on the outer wall of the auxiliary ring also moves downwards, pressing down on the carrier plate and compressing the limit spring. If the carrier plate moves to the pressure relief sensor, it triggers the sensor, which then controls the pressure relief solenoid valve to open and release pressure. This prevents the piston rod from overtraveling and avoids cylinder explosion, ensuring high safety. During use, the auxiliary ring protects the piston rod end with its anti-wear plate, preventing wear. Furthermore, the auxiliary ring, through the connecting plate, allows for directional movement of the piston rod, improving its resistance to lateral forces and preventing damage. Attached Figure Description

[0016] Figure 1 is a schematic diagram of the overall structure of this utility model;

[0017] Figure 2 is a structural diagram of the guide rail of this utility model;

[0018] Figure 3 is a diagram of the internal structure of the cylinder body of this utility model;

[0019] Figure 4 is a cross-sectional view of the auxiliary ring of this utility model.

[0020] In the diagram: 1. Cylinder body; 2. Base; 3. Piston rod; 4. Dustproof rubber ring; 5. Auxiliary ring; 6. Protective rubber ring; 7. Guide rail; 8. Connecting plate; 9. Air injection valve; 10. Pressure relief solenoid valve; 11. Carrier plate; 12. Limit spring; 13. Pressure relief sensor; 14. Piston cylinder; 15. Snap ring; 16. Seal; 17. Air nozzle; 18. Anti-wear plate; 19. Internal groove; 20. Rubber column; 21. Airbag cushion. Detailed Implementation

[0021] To enable those skilled in the art to better understand the technical solution of this utility model, the present utility model will be further described in detail below with reference to the accompanying drawings.

[0022] As shown in Figures 1-4, the nitrogen spring with automatic pressure relief provided in this embodiment of the present invention includes a cylinder body 1, a base 2 detachably connected to the outer surface of the bottom end of the cylinder body 1, a piston rod 3 provided in the middle of the cylinder body 1, an auxiliary ring 5 provided on the outer wall of the piston rod 3, a protective rubber ring 6 provided between the auxiliary ring 5 and the piston rod 3, a guide rail 7 provided on the outer wall of the cylinder body 1, a connecting plate 8 fixedly connected to the outer wall of the auxiliary ring 5, an air injection valve 9 and a pressure relief solenoid valve 10 provided on the outer wall of the base 2, the air injection valve 9 being located on one side of the pressure relief solenoid valve 10, a carrier plate 11 provided in the middle of the guide rail 7, a limit spring 12 provided between the carrier plate 11 and the guide rail 7, and a pressure relief sensor 13 detachably connected to the outer surface of one side of the guide rail 7.

[0023] Specifically, in this embodiment, a cylinder body 1 is included. A base 2 is detachably connected to the outer surface of the bottom end of the cylinder body 1. A piston rod 3 is provided in the middle of the cylinder body 1. When the piston rod 3 is compressed, the auxiliary ring 5 will move downward along with the piston rod 3. During the downward movement, the connecting plate 8 on the outer wall of the auxiliary ring 5 will also move downward and press down on the carrier plate 11, causing the carrier plate 11 to compress the limiting spring 12. If the carrier plate 11 moves down to the pressure relief sensor 13, it will trigger the pressure relief sensor 13. The pressure relief sensor 13 will control the pressure relief solenoid valve 10 to open and release pressure, thus preventing the piston rod 3 from being compressed. Overtravel operation can prevent cylinder explosion, ensuring high safety. An auxiliary ring 5 is provided on the outer wall of the piston rod 3, and a protective rubber ring 6 is provided between the auxiliary ring 5 and the piston rod 3. A guide rail 7 is provided on the outer wall of the cylinder body 1. A connecting plate 8 is fixedly connected to the outer wall of the auxiliary ring 5. An air injection valve 9 and a pressure relief solenoid valve 10 are provided on the outer wall of the base 2. The air injection valve 9 is located on one side of the pressure relief solenoid valve 10. A carrier plate 11 is provided in the middle of the guide rail 7. A limit spring 12 is provided between the carrier plate 11 and the guide rail 7. A pressure relief sensor 13 is detachably connected to one side of the outer surface of the guide rail 7.

[0024] This utility model provides an automatically depressurizing nitrogen spring. When the piston rod 3 is compressed, the auxiliary ring 5 moves downward along with the piston rod 3. During this downward movement, the connecting plate 8 on the outer wall of the auxiliary ring 5 also moves downward, pressing down on the carrier plate 11 and causing the carrier plate 11 to compress the limiting spring 12. If the carrier plate 11 moves down to the pressure relief sensor 13, it will trigger the pressure relief sensor 13, which will control the pressure relief solenoid valve 10 to open and release pressure. This can prevent the piston rod 3 from overtravel and avoid cylinder explosion, thus ensuring high safety.

[0025] In one embodiment of this utility model, a dustproof rubber ring 4 is provided between the cylinder body 1 and the piston rod 3, a piston cylinder 14 is provided on the outer wall of the piston rod 3, a retaining ring 15 is provided between the piston cylinder 14 and the cylinder body 1, a sealing element 16 is provided on the outer wall of the piston cylinder 14, and an air nozzle 17 is provided on the inner surface of the bottom end of the cylinder body 1. The dustproof rubber ring 4 can prevent dust from entering the cylinder body 1 during use, and the sealing element 16 mainly serves as an internal seal during use.

[0026] In another embodiment of this utility model, an anti-wear plate 18 is provided above the auxiliary ring 5, an internal groove 19 is provided in the middle of the auxiliary ring 5, a rubber column 20 is provided on the lower outer surface of the anti-wear plate 18, and an airbag pad 21 is provided in the middle of the internal groove 19. When in use, the auxiliary ring 5 can protect the end of the piston rod 3 through the anti-wear plate 18, which can prevent the end of the piston rod 3 from being worn. In addition, the auxiliary ring 5 can directionally move the piston rod 3 through the connecting plate 8, which can improve the piston rod 3's resistance to lateral forces and prevent the piston rod 3 from being damaged by lateral forces.

[0027] In another embodiment of this utility model, the carrier plate 11 is movably connected to the guide rail 7 via the limiting spring 12, and the lower outer surface of the connecting plate 8 is connected to the upper outer surface of the carrier plate 11. The guide rail 7 can assist the piston rod 3 to move up and down during use.

[0028] In one embodiment of this utility model, the pressure relief sensor 13 is electrically connected to the pressure relief solenoid valve 10, and there are two sets of guide rails 7. The pressure relief sensor 13 can control the pressure relief solenoid valve 10 to start, which can prevent cylinder explosion.

[0029] In another embodiment of this utility model, the anti-abrasion sheet 18 and the rubber column 20 are integrally formed. The outer surface of the bottom end of the rubber column 20 is connected to the outer surface of the top end of the airbag pad 21. When the anti-abrasion sheet 18 is subjected to pressure, it can press down on the airbag pad 21 through the rubber column 20, so that the airbag pad 21 expands in the built-in groove 19, which can play a certain anti-pressure buffering effect.

[0030] It should be noted that this utility model is a nitrogen spring with automatic pressure relief. In use, nitrogen is first injected into the cylinder 1 through the injection valve 9. When the piston rod 3 is compressed, it compresses the nitrogen inside the cylinder 1 through the piston cylinder 14, creating high pressure for buffering. When the pressure disappears, the released nitrogen pressure causes the piston rod 3 to rebound. When the piston rod 3 is compressed, the auxiliary ring 5 moves downwards along with it. During this downward movement, the connecting plate 8 on the outer wall of the auxiliary ring 5 also moves downwards, pressing down on the carrier plate 11, causing the carrier plate 11 to compress the limiting spring 12. When moved to the pressure relief sensor 13, it will be triggered, and the pressure relief sensor 13 will control the pressure relief solenoid valve 10 to open and relieve pressure. This can prevent the piston rod 3 from overtravel and avoid cylinder explosion, thus ensuring high safety. In addition, the auxiliary ring 5 can protect the end of the piston rod 3 through the anti-wear plate 18 during use, which can prevent wear on the end of the piston rod 3. Furthermore, the auxiliary ring 5 can directionally move the piston rod 3 through the connecting plate 8, which can improve the piston rod 3's resistance to lateral forces and prevent the piston rod 3 from being damaged by lateral forces. This is quite practical.

[0031] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely preferred examples and are not intended to limit the utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed utility model. The scope of protection of this utility model is defined by the appended claims and their equivalents.

Claims

1. A nitrogen gas spring that can be automatically pressure released, comprising a cylinder (1), characterized in that: A base (2) is detachably connected to the bottom outer surface of the cylinder (1). A piston rod (3) is provided in the middle of the cylinder (1). An auxiliary ring (5) is provided on the outer wall of the piston rod (3). A protective rubber ring (6) is provided between the auxiliary ring (5) and the piston rod (3). A guide rail (7) is provided on the outer wall of the cylinder (1). A connecting plate (8) is fixedly connected to the outer wall of the auxiliary ring (5). An air injection valve (9) and a pressure relief solenoid valve (10) are provided on the outer wall of the base (2). The air injection valve (9) is located on one side of the pressure relief solenoid valve (10). A carrier plate (11) is provided in the middle of the guide rail (7). A limit spring (12) is provided between the carrier plate (11) and the guide rail (7). A pressure relief sensor (13) is detachably connected to one side of the outer surface of the guide rail (7).

2. The self-relieving nitrogen gas spring of claim 1, wherein: A dustproof rubber ring (4) is provided between the cylinder (1) and the piston rod (3). A piston cylinder (14) is provided on the outer wall of the piston rod (3). A retaining ring (15) is provided between the piston cylinder (14) and the cylinder (1). A sealing element (16) is provided on the outer wall of the piston cylinder (14). An air nozzle (17) is provided on the inner surface of the bottom end of the cylinder (1).

3. The self-relieving nitrogen gas spring of claim 1, wherein: An anti-wear plate (18) is provided above the auxiliary ring (5), an internal groove (19) is provided in the middle of the auxiliary ring (5), a rubber column (20) is provided on the lower outer surface of the anti-wear plate (18), and an airbag cushion (21) is provided in the middle of the internal groove (19).

4. The nitrogen spring with automatic pressure relief according to claim 1, characterized in that: The carrier plate (11) is movably connected to the guide rail (7) via a limiting spring (12), and the lower outer surface of the connecting plate (8) is connected to the upper outer surface of the carrier plate (11).

5. A nitrogen spring with automatic pressure relief according to claim 1, characterized in that: The pressure relief sensor (13) is electrically connected to the pressure relief solenoid valve (10), and there are two sets of guide rails (7).

6. A nitrogen spring with automatic pressure relief according to claim 3, characterized in that: The anti-wear pad (18) and the rubber column (20) are integrally formed, and the bottom outer surface of the rubber column (20) is connected to the top outer surface of the airbag cushion (21).

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