Buffering nitrogen spring

Abstract

The utility model discloses a buffering nitrogen spring which comprises a cylinder body, a plunger rod and an installation piece, the plunger rod comprises a movable rod and an installation part which are integrally arranged, an annular groove is formed in the side end of the installation part, a first annular edge and a second annular edge are formed at the upper end and the lower end of the annular groove, and a metal O-shaped ring is connected to the peripheral side of the first annular edge in a sleeved mode. The bottom of the mounting part extends downwards to form a tubular extension part, the end face of the inner side of the tubular extension part can abut against the metal O-shaped ring, the mounting part is provided with a first air passing hole penetrating through the top of the first ring edge and the side face of the annular groove, and the second ring edge is provided with a longitudinally-penetrating second air passing hole. Through the arrangement of the first air passing hole and the second air passing hole, when the spring rebounds, nitrogen inside the spring circulates in the first air passing hole or the second air passing hole, and due to the fact that the aperture of the first air passing hole and the aperture of the second air passing hole are small, the circulation rate of airflow is affected, the rebounding speed of the spring can be reduced, and the excellent buffering effect is achieved; meanwhile, the service life of the nitrogen spring is prolonged.

Description

Technical Field

[0001] This utility model relates to the field of nitrogen spring technology, specifically a buffer 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] Existing nitrogen springs suffer from excessively rapid reciprocating rebound during compression, which accelerates spring damage and reduces their lifespan. In more serious cases, excessive rebound force can cause the internal plunger rod to eject, posing a safety hazard to the surrounding environment or workers. To improve the lifespan of nitrogen springs, their cushioning effect needs to be enhanced; therefore, a cushioning nitrogen spring has been developed. Utility Model Content

[0004] The purpose of this invention is to provide a buffer nitrogen spring that solves the problems mentioned above in the background technology.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a buffer nitrogen spring, comprising a cylinder body, a plunger rod, and a mounting component that are fitted together. The cylinder body has a mounting opening. The mounting component is fitted onto the mounting opening on the cylinder body after being sleeved with the plunger rod. A sealed space is formed between the cylinder body, the plunger rod, and the mounting component, and the sealed space is filled with nitrogen. The plunger rod includes an integrally formed movable rod and a mounting part. The mounting part has an annular groove on its side end, and the upper and lower ends of the annular groove form a first annular edge and a second annular edge. A metal O-ring is fitted around the first annular edge. A tubular extension extends downward from the bottom of the mounting component, and the inner end face of the tubular extension has a circumferential contact surface that can abut against the metal O-ring. The mounting part has a first vent hole, one end of which penetrates the top of the first annular edge, and the other end of which penetrates the side of the annular groove. A second vent hole is provided longitudinally through the second annular edge.

[0006] Preferably, the first vent is L-shaped.

[0007] Preferably, the mounting part is provided with an air passage, one end of which is connected to the first air passage hole, and the other end of which passes through the bottom of the mounting part. A one-way valve is installed at the bottom of the air passage.

[0008] Preferably, a first retaining ring and an O-ring are provided between the cylinder body and the mounting component.

[0009] Preferably, an external dustproof component is provided between the cylinder body and the mounting component, and the external dustproof component is close to the top of the cylinder body.

[0010] Preferably, a first guide element is provided on the inner side of the mounting component, the first guide element abuts against the circumferential end face of the movable rod, and a second guide element is sleeved on the circumferential side of the second ring edge, the second guide element abuts against the inner wall of the cylinder.

[0011] Preferably, a Y-shaped sealing ring is provided between the mounting component and the plunger rod, and a second retaining ring is sleeved on the movable rod, with the second retaining ring located near the mounting part.

[0012] Preferably, an inner dustproof component is provided between the mounting component and the plunger rod, and the inner dustproof component is close to the top of the cylinder block.

[0013] Preferably, the bottom of the cylinder is provided with an air intake channel that connects the sealed space and the outside, and a screw plug is installed at the outer end of the air intake channel.

[0014] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0015] This invention, by setting a first vent hole and a second vent hole, allows nitrogen gas inside the spring to flow through either the first or second vent hole when the spring rebounds. Because the diameters of the first and second vent holes are small, the airflow rate is affected, which reduces the spring's rebound speed and provides an excellent buffering effect, while also improving the service life of the nitrogen spring. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the structure of the present invention. Figure 1 ;

[0017] Figure 2 This is a schematic diagram of the structure of the present invention. Figure 2 . Detailed Implementation

[0018] 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.

[0019] 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.

[0020] Please see Figures 1 to 2 This utility model provides an embodiment of a nitrogen buffer spring, comprising a cylinder 1, a plunger rod 2, and a mounting component 3 that are fitted together. The cylinder 1 has an installation opening. The mounting component 3 is fitted onto the plunger rod 2 through the installation opening on the cylinder 1, forming a sealed space between the cylinder 1, the plunger rod 2, and the mounting component 3. This sealed space is filled with nitrogen gas. The plunger rod 2 includes an integrally formed movable rod 21 and a mounting portion 22. The movable rod 21 is a movable end that passes through the top of the mounting component 3. The mounting portion 22 has an annular groove 23 on its side, and the upper and lower ends of the annular groove 23 form a first annular edge 24 and a second annular edge 25. A metal O-ring 26 is fitted around the first annular edge 24. The mounting component... 3. A tubular extension 31 extends downward from the bottom, and the inner end face of the tubular extension 31 is provided with a circumferential contact surface that can abut against the metal O-ring 26. The mounting part 22 is provided with a first vent 27. One end of the first vent 27 passes through the top of the first ring edge 24, and the other end of the first vent 27 passes through the side of the annular groove 23. The second ring edge 25 is provided with a longitudinally penetrating second vent 28. When the spring rebounds, the nitrogen gas inside it flows through the first vent 27 or the second vent 28. Because the aperture of the first vent 27 and the second vent 28 is small, it affects the flow rate of the airflow, which can reduce the spring rebound speed and play an excellent buffering role, while improving the service life of the nitrogen spring.

[0021] In this embodiment, the first vent 27 is L-shaped, and the mounting part 22 is provided with a vent passage 29. One end of the vent passage 29 is connected to the first vent 27, and the other end of the vent passage 29 passes through the bottom of the mounting part 22. A one-way valve 4 is installed at the bottom of the vent passage 29. When the spring is pressed down, the one-way valve 4 opens, increasing the upward flow of nitrogen at the bottom of the cylinder 1 and improving the flow rate of nitrogen, so as not to affect the pressing speed of the spring and not to affect normal use.

[0022] In this embodiment, a first retaining ring 5 and an O-ring seal 6 are provided between the cylinder body 1 and the mounting part 3. The first retaining ring 5 is used to fix the cylinder body 1 and the mounting part 3 together, so that the two are fixedly connected. The O-ring seal 6 fills the gap between the cylinder body 1 and the mounting part 3, thereby improving the sealing effect of the two.

[0023] Furthermore, an external dustproof component 7 is provided between the cylinder body 1 and the mounting component 3, and the external dustproof component 7 is close to the top of the cylinder body 1. The external dustproof component 7 can prevent external dust from entering between the cylinder body 1 and the mounting component 3, and prevent dust from affecting the working effect of the spring.

[0024] The mounting component 3 has a first guide element 8 on its inner side, which abuts against the circumferential end face of the movable rod 21. The second guide element 9 is sleeved on the circumferential side of the second ring edge 25, which abuts against the inner wall of the cylinder body 1. Both the first guide element 8 and the second guide element 9 abut against the plunger rod 2, which can improve the vertical guidance of the plunger rod 2 and allow the metal O-ring 26 to accurately enter the tubular extension 31 and abut against the circumferential contact surface.

[0025] A Y-shaped sealing ring 10 is provided between the mounting part 1 and the plunger rod 2. A second retaining ring 12 is sleeved on the movable rod 21, and the second retaining ring 12 is close to the mounting part 22. When the nitrogen spring rebounds, the second retaining ring 12 can abut against the Y-shaped sealing ring 10. Due to the elasticity of the Y-shaped sealing ring 10, the buffering effect of the nitrogen spring can be improved. In addition, the Y-shaped sealing ring 10 fills the gap between the mounting part 3 and the movable rod 21, improving the sealing effect of both.

[0026] An inner dustproof component 13 is provided between the mounting component 3 and the plunger rod 2, and the inner dustproof component 13 is close to the top of the cylinder body 1. The inner dustproof component 13 can prevent external dust from entering between the plunger rod 2 and the mounting component 3, and prevent dust from affecting the working effect of the spring.

[0027] In this embodiment, the bottom of the cylinder 1 is provided with an air intake channel 14 that connects the sealed space and the outside. The air intake channel 14 is used to inject compressed nitrogen into the sealed space, and a screw plug 15 is installed at the outer end of the air intake channel 14.

[0028] 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 buffer nitrogen spring, comprising a cylinder body, a plunger rod, and a mounting component that are fitted together, characterized in that: The cylinder body has an installation opening. The mounting component is fitted onto the piston rod and installed in the installation opening on the cylinder body. A sealed space is formed between the cylinder body, the piston rod, and the mounting component. The sealed space is filled with nitrogen gas. The piston rod includes an integrally formed movable rod and a mounting part. The mounting part has an annular groove on its side end, and the upper and lower ends of the annular groove form a first annular edge and a second annular edge. A metal O-ring is fitted around the first annular edge. The bottom of the mounting component extends downward into a tubular extension, and the inner end face of the tubular extension has a circumferential contact surface that can abut against the metal O-ring. The mounting part has a first vent hole. One end of the first vent hole penetrates the top of the first annular edge, and the other end of the first vent hole penetrates the side of the annular groove. The second annular edge has a longitudinally penetrating second vent hole.

2. The buffer nitrogen spring according to claim 1, characterized in that: The first vent is L-shaped.

3. A buffer nitrogen spring according to any one of claims 1 or 2, characterized in that: The mounting part is provided with an air passage, one end of which is connected to the first air passage hole, and the other end of which passes through the bottom of the mounting part. A one-way valve is installed at the bottom of the air passage.

4. A buffer nitrogen spring according to claim 1, characterized in that: A first retaining ring and an O-ring are provided between the cylinder body and the mounting component.

5. A buffer nitrogen spring according to any one of claims 1 or 4, characterized in that: An external dustproof component is provided between the cylinder body and the mounting component, and the external dustproof component is located near the top of the cylinder body.

6. A buffer nitrogen spring according to claim 1, characterized in that: The mounting component has a first guide element on its inner side, which abuts against the circumferential end face of the movable rod. The second ring edge is sleeved with a second guide element, which abuts against the inner wall of the cylinder.

7. A buffer nitrogen spring according to claim 1, characterized in that: A Y-shaped sealing ring is provided between the mounting component and the plunger rod, and a second retaining ring is sleeved on the movable rod, with the second retaining ring close to the mounting part.

8. A buffer nitrogen spring according to any one of claims 1, 6 or 7, characterized in that: An inner dustproof component is provided between the mounting component and the plunger rod, and the inner dustproof component is located near the top of the cylinder block.

9. A buffer nitrogen spring according to claim 1, characterized in that: The bottom of the cylinder is provided with an air intake channel that connects the sealed space to the outside, and a screw plug is installed at the outer end of the air intake channel.

Images