Low-temperature nitrogen spring

Abstract

The utility model discloses a low-temperature nitrogen spring which comprises a cylinder body, a piston rod and a mounting piece, a mounting opening is formed in the cylinder body, the mounting piece is mounted on the mounting opening in the cylinder body in a matched mode, the piston rod is connected with the inner side of the mounting piece in a sleeved mode, and a guide element, a Y-shaped sealing ring and a metal sealing ring are arranged between the piston rod and the mounting piece. And the guide element, the Y-shaped sealing ring and the metal sealing ring are sequentially arranged from top to bottom. The Y-shaped sealing ring and the metal sealing ring are arranged, so that the overall sealing effect of the nitrogen spring is improved, high-pressure nitrogen can be injected into the nitrogen spring, pressure drop caused by too low temperature is prevented, the heat loss speed of the nitrogen spring is reduced while the sealing effect is improved, the temperature inside the nitrogen can be kept constant, and the service life of the nitrogen spring is prolonged. The problem that the viscosity of the lubricating agent is increased is solved, so that the nitrogen spring can be normally used in a low-temperature environment, and the nitrogen spring can be normally used in an environment of minus 30 DEG C.

Description

Technical Field

[0001] This utility model relates to the field of nitrogen spring technology, specifically a low-temperature nitrogen spring. Background Technology

[0002] Nitrogen springs (also known as die nitrogen springs, nitrogen springs, nitrogen cylinders, or nitrogen cylinders) are a new type of elastic component that uses high-pressure nitrogen as the working medium. They are small in size, have high elasticity, long stroke, stable operation, and are precisely manufactured.

[0003] The low-temperature environment in which nitrogen springs operate has a significant impact on them. Low temperatures can lead to a drop in nitrogen pressure and an increase in the viscosity of the lubricant between the piston and piston rod, thus affecting the performance of the nitrogen spring. Therefore, a low-temperature nitrogen spring has been developed. Utility Model Content

[0004] The purpose of this invention is to provide a low-temperature nitrogen spring, which solves the problems mentioned in the background art.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a low-temperature nitrogen spring, comprising a cylinder, a piston rod, and a mounting component. The cylinder has an installation opening, and the mounting component is fitted into the installation opening on the cylinder. The piston rod is sleeved inside the mounting component. A guide element, a Y-shaped sealing ring, and a metal sealing ring are provided between the piston rod and the mounting component, and the guide element, the Y-shaped sealing ring, and the metal sealing ring are arranged sequentially from top to bottom.

[0006] Preferably, the inner side of the mounting component is provided with an annular groove, the metal sealing ring is installed in the annular groove, and the circumferential end face of the piston rod covers the opening of the annular groove, forming an accommodating space between the piston rod and the annular groove, which is filled with lubricant.

[0007] Preferably, the top of the mounting component is provided with an outwardly extending annular protrusion, the top of the cylinder body is provided with a recessed portion adapted to the annular protrusion, the recessed portion is provided with an annular mounting groove, and a sealing ring is provided in the annular mounting groove. The annular protrusion is fitted into the recessed portion from top to bottom, and the sealing ring abuts against the bottom of the annular protrusion.

[0008] Preferably, the inner side of the mounting component is further provided with mounting groove one and mounting groove two, which respectively engage with the guide element and the Y-shaped sealing ring, and the bottom of the guide element abuts against the top of the Y-shaped sealing ring.

[0009] Preferably, the inner side of the mounting component near the top end is further provided with a mounting groove three, and the mounting groove three is provided with a dustproof component, which abuts against the outer circumference of the piston rod.

[0010] Preferably, an air intake channel is provided at the bottom of the cylinder block, and a screw plug is installed at the outer end of the air intake channel.

[0011] Preferably, a plastic sleeve is fitted around the outer circumference of the cylinder body.

[0012] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0013] This invention improves the overall sealing effect of the nitrogen spring by setting a Y-shaped sealing ring and a metal sealing ring, both of which are in contact with the piston rod. High-pressure nitrogen can be injected into the nitrogen spring to prevent pressure drop caused by low temperature. The improved sealing effect also reduces the heat loss rate of the nitrogen spring, which can keep the internal temperature of the nitrogen spring constant and prevent the problem of increased lubricant viscosity, so as to ensure normal use of the nitrogen spring in low temperature environment. Attached Figure Description

[0014] Figure 1 This is a cross-sectional view of the overall structure of this utility model;

[0015] Figure 2 A partial structural cross-section of this utility model. Figure 1 ;

[0016] Figure 3 A partial structural cross-section of this utility model. Figure 2 . Detailed Implementation

[0017] 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.

[0018] In the description of this utility model, it should be understood that the terms "center," "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "horizontal," "vertical," "top," "inner," and "outer," etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings and are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0019] Please see Figures 1 to 3This utility model provides an embodiment of a low-temperature nitrogen spring, comprising a cylinder 1, a piston rod 2, and a mounting component 3 that are fitted together. The cylinder 1 has an installation opening, and the mounting component 3 is fitted into the installation opening on the cylinder 1. The piston rod 2 is sleeved inside the mounting component 3. A guide element 4, a Y-shaped sealing ring 5, and a metal sealing ring 6 are provided between the piston rod 2 and the mounting component 3, arranged sequentially from top to bottom. Both the Y-shaped sealing ring 5 and the metal sealing ring 6 are in contact with the piston rod 2, improving the overall sealing effect of the nitrogen spring. High-pressure nitrogen can be injected into the nitrogen spring to prevent pressure drop due to low temperatures. The improved sealing effect also reduces the heat loss rate of the nitrogen spring, allowing the internal temperature of the nitrogen to remain constant and preventing the lubricant viscosity from increasing, thus ensuring normal operation of the nitrogen spring in low-temperature environments.

[0020] Furthermore, the inner side of the mounting component 2 is provided with an annular groove 7, the metal sealing ring 6 is installed in the annular groove 7, and the circumferential end face of the piston rod 2 covers the opening of the annular groove 7, forming an accommodating space between the piston rod 2 and the annular groove 7. This accommodating space is filled with lubricant, which can reduce the friction between the metal sealing ring 6 and the piston rod 2, improve friction flow, and at the same time, the high-frequency friction can maintain the temperature in the accommodating space, preventing the problem of increased lubricant viscosity between the piston and the piston rod.

[0021] Furthermore, the top of the mounting component 3 is provided with an outwardly extending annular protrusion 8, and the top of the cylinder body 1 is provided with a recessed portion 9 that matches the annular protrusion 8. An annular mounting groove 10 is provided on the recessed portion 9, and a sealing ring 11 is provided in the annular mounting groove 10. The annular protrusion 8 is fitted into the recessed portion 9 from top to bottom, and the sealing ring 11 abuts against the bottom of the annular protrusion 8. This structure further improves the sealing effect between the mounting component 3 and the cylinder body 1, and improves the overall sealing effect of the nitrogen spring. High-pressure nitrogen can be injected into the nitrogen spring to prevent pressure drop caused by low temperature. The improved sealing effect also reduces the heat loss rate of the nitrogen spring, which can keep the internal temperature of the nitrogen constant and prevent the problem of increased lubricant viscosity, so as to ensure that the nitrogen spring can be used normally in low temperature environment.

[0022] In this embodiment, the inner side of the mounting component 3 is also provided with mounting groove 12 and mounting groove 2 13, which are respectively fitted to the guide element 4 and the Y-shaped sealing ring 5, and the bottom of the guide element 4 abuts against the top of the Y-shaped sealing ring 5.

[0023] In this embodiment, a mounting groove 3 14 is provided on the inner side of the mounting member 3 near the top end. The mounting groove 3 14 is provided with a dustproof component 15. The dustproof component 15 abuts against the outer circumference of the piston rod 2. The dustproof component 15 can prevent external dust from entering between the piston rod 2 and the mounting member 3, and prevent dust from affecting the working effect of the spring.

[0024] In this embodiment, an air intake channel 16 is provided at the bottom of the cylinder 1, and a screw plug (not shown) is installed at the outer end of the air intake channel 16. The air intake channel 16 is used to inject compressed nitrogen into the nitrogen spring, and then a screw plug is installed at the outer end of the air intake channel 16 to ensure the sealing effect of the nitrogen spring.

[0025] In this embodiment, a plastic sleeve 17 is provided on the outer circumference of the cylinder body 1. The plastic sleeve 17 can play a certain role in stabilizing the cylinder body 1, reducing the influence of external temperature on the cylinder body 1, further maintaining the internal temperature of the nitrogen spring, and preventing the negative impact of low temperature on the nitrogen spring.

[0026] The nitrogen spring in this embodiment can be used normally in an environment of -30 degrees Celsius.

[0027] It will be apparent to those skilled in the art that this invention is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this invention. Therefore, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of this invention is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within this invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

Claims

1. A cryogenic nitrogen gas spring comprising a cylinder, a piston rod and a mounting member, characterized in that: The cylinder is provided with a mounting opening, the mounting member is fitted in the mounting opening of the cylinder, the piston rod is sleeved with the inside of the mounting member, the guiding element, the Y-shaped sealing ring and the metal sealing ring are arranged between the piston rod and the mounting member, and the guiding element, the Y-shaped sealing ring and the metal sealing ring are arranged in sequence from top to bottom.

2. A cryogenic nitrogen gas spring according to claim 1, wherein: The inside of the mounting member is provided with an annular groove position, the metal sealing ring is installed in the annular groove position, the circumferential end surface of the piston rod covers the opening of the annular groove position, and the annular groove position and the piston rod form a containing space, and the containing space is filled with lubricant.

3. A cryogenic nitrogen gas spring as defined in claim 1, wherein: The top of the mounting member is provided with an outwardly extending annular flange, the top of the cylinder is provided with a recess matched with the annular flange, the recess is provided with an annular mounting groove, the annular mounting groove is provided with a sealing ring, the annular flange is sleeved into the recess from top to bottom, and the sealing ring is in abutment with the bottom of the annular flange.

4. A cryogenic nitrogen gas spring as defined in claim 1, wherein: The inside of the mounting member is further provided with mounting groove one and mounting groove two which are respectively sleeved with the guiding element and the Y-shaped sealing ring, and the bottom of the guiding element is in abutment with the top of the Y-shaped sealing ring.

5. A cryogenic nitrogen gas spring as defined in claim 1, wherein: The inside of the mounting member is further provided with mounting groove three near one end of the top, the mounting groove three is provided with a dustproof member, and the dustproof member is in abutment with the circumferential outside of the piston rod.

6. A cryogenic nitrogen gas spring as defined in claim 1, wherein: The bottom of the cylinder is provided with an air inlet channel, and the outer end of the air inlet channel is provided with a screw plug.

7. A cryogenic nitrogen gas spring as defined in claim 1, wherein: The circumferential outside of the cylinder is sleeved with a plastic sleeve.

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