Nitrogen spring with anti-wear structure

Abstract

The utility model discloses a nitrogen gas spring with anti -wear structure belongs to nitrogen gas spring technical field, including spring cylinder main part, one end tip of spring cylinder main part is fixed with anti -wear piston structure, the anti -wear piston structure includes piston ring, and one side outer wall of piston ring is fixed with oil pipe, and the tip of oil pipe is connected with the cap of screw thread, and the front end center of piston ring is equipped with the female ring groove, this nitrogen gas spring provides the contact and telescopic surface for piston rod through the inner ring cavity of piston ring built -in, and the ball body of cooperation ring cloth provides the rolling and reduces the friction influence, and the sealing ring keeps the gas tightness of piston process, can even with the lubricating oil in the oil storage cavity contact simultaneously with the ball body rolling, thereby provides lubrication for the piston rod surface while contacting and rolling, need not manual frequent operation to add, thereby maximization reduces the influence of wear and tear, improves use efficiency and convenience.

Description

Technical Field

[0001] This utility model relates to the field of nitrogen spring technology, specifically a nitrogen spring with an anti-wear structure. Background Technology

[0002] Nitrogen springs, also known as die 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 widely used in industrial manufacturing, playing a crucial role, especially in the mold, automotive, and electronics industries. They are characterized by their small size, high elasticity, long stroke, smooth operation, precision manufacturing, long service life (up to one million cycles), gentle elasticity curve, and lack of pre-tensioning requirements. They can perform tasks that conventional elastic components such as metal springs, rubber, and air cushions cannot, simplifying mold design and manufacturing, facilitating mold installation and adjustment, extending mold life, and ensuring stable product quality. They can also be designed as a nitrogen spring system, working as part of the mold, easily achieving constant pressure and delayed action within the system. They are a new generation of ideal elastic components with flexible properties.

[0003] Existing nitrogen springs mainly achieve their elastic function by sealing high-pressure nitrogen. When an external force compresses the piston rod, the nitrogen is compressed and stores energy. After the external force disappears, the nitrogen expands and pushes the piston rod back, generating a constant spring pressure. Its core structure includes components such as a cylinder, piston rod, sealing ring, and safety relief valve.

[0004] In the above-mentioned nitrogen spring, the buffering and rebound process is formed by the extension and retraction of the piston rod and the cylinder. Therefore, the outer wall of the piston rod and the inner wall of the cylinder will rub against each other for a long time, resulting in insufficient smoothness of the outer wall of the piston rod. In order to avoid this phenomenon, lubricating oil is usually applied to the contact part between the cylinder and the piston rod. However, this operation requires the operator to add it periodically, which is very inconvenient. If it is not applied for a long time, wear will still occur. Therefore, we propose a nitrogen spring with an anti-wear structure. Utility Model Content

[0005] The summary section of this application is intended to provide a brief overview of the concepts, which will be described in detail in the detailed description section below. This summary section is not intended to identify key or essential features of the claimed technical solutions, nor is it intended to limit the scope of the claimed technical solutions.

[0006] The purpose of this invention is to provide a nitrogen spring with an anti-wear structure to solve the problems mentioned in the background art.

[0007] To achieve the above objectives, this utility model provides the following technical solution: a nitrogen spring with an anti-wear structure, comprising a spring cylinder body, an anti-wear piston structure fixed at one end of the spring cylinder body, the anti-wear piston structure comprising a piston ring, and an oil supply pipe fixed on one side of the outer wall of the piston ring, the end of the oil supply pipe being threadedly connected to a cap, an inner concave annular groove being formed at the center of the front end of the piston ring, an inner annular cavity extending from the inner wall of the inner concave annular groove, an oil storage cavity being formed annularly inside the piston ring, and ball bearings being embedded in the inner walls of the inner annular cavity, a sealing ring being embedded at the bottom end of the inner annular cavity, and a piston rod being tightly fitted to the inner wall of the sealing ring, an alloy coating being applied to the outer surface of the piston rod, a piston disc being fixed at the bottom end of the piston rod, and a piston rubber ring being embedded in the outer walls of the piston disc.

[0008] Furthermore, the piston ring is integrally fixedly connected to the end of the spring cylinder body, and the concave annular groove opened at the end of the piston ring has an arc-shaped concave edge structure.

[0009] Furthermore, the oil storage chamber is circumferentially opened along the inside of the piston ring, and one side of the oil storage chamber is connected to the oil delivery pipe.

[0010] Furthermore, the inner ring cavity is circumferentially opened along the inner wall of the piston ring, and the top end of the inner ring cavity is extended and fixed to the inner concave ring groove.

[0011] Furthermore, the ball bearings are distributed in a ring along the inner wall of the inner ring cavity, and the inner wall of the inner ring cavity slides with the piston rod through the ball bearings.

[0012] Furthermore, the inner wall of the ball bearing is in contact with the oil storage cavity, and the oil storage cavity is uniformly filled with lubricating oil.

[0013] Furthermore, the alloy coating is uniformly applied along the outer wall of the piston rod, and the end of the piston rod is fixedly connected to the piston disc.

[0014] Furthermore, the spring cylinder body includes a cylinder shell, and a base is fixed to the bottom of the cylinder shell. An air intake valve is provided at the center of the base, and a nitrogen chamber is connected to the top of the air intake valve. A piston disc is attached to the top of the nitrogen chamber, and a piston cavity is provided inside the cylinder shell.

[0015] Furthermore, the nitrogen chamber is partially filled along the inside of the piston cavity, and the piston disc is tightly fitted around the inner wall of the piston cavity.

[0016] Furthermore, the base is fixedly connected to the bottom of the cylinder shell, and the base is connected to the interior of the nitrogen chamber through an air intake valve.

[0017] Compared with the prior art, the beneficial effects of this utility model are: The nitrogen spring provides a contact and extension surface for the piston rod through the inner ring cavity built into the piston ring. The rolling ball of the ring cloth provides rolling to reduce the impact of friction, while the sealing ring maintains the gas seal during the piston process. While the rolling ball is rolling, it can evenly contact the lubricating oil in the oil reservoir, thus providing lubrication to the piston rod surface while rolling. There is no need for frequent manual operation to add oil, thereby minimizing the impact of wear and improving the efficiency and convenience of use. This nitrogen spring consists of a cylinder shell and a piston ring. It can provide stable extension and rebound for the piston rod through the piston chamber inside the cylinder shell. At the same time, in conjunction with the intake valve structure at the bottom, it can replenish the nitrogen in the nitrogen chamber in a timely manner, which is conducive to ensuring sufficient nitrogen supply and maintaining stable elasticity during long-term use. Attached Figure Description

[0018] Figure 1 This is a three-dimensional structural diagram of the main body of the spring cylinder of this utility model; Figure 2 This is a side view sectional view of the main body of the spring cylinder of this utility model; Figure 3 This is a three-dimensional structural diagram of the wear-resistant piston structure of this utility model; Figure 4 This is a three-dimensional schematic diagram of the piston ring structure of this utility model; Figure 5 This is a side view sectional diagram of the piston ring structure of this utility model; Figure 6 This is a schematic diagram of the cross-sectional structure of the piston rod end of this utility model.

[0019] In the diagram: 1. Spring cylinder body; 101. Cylinder shell; 102. Base; 103. Intake valve; 104. Nitrogen chamber; 105. Piston chamber; 2. Anti-wear piston structure; 201. Piston ring; 202. Oil supply pipe; 203. Cap; 204. Inner concave ring groove; 205. Inner ring cavity; 206. Oil reservoir; 207. Ball bearing; 208. Sealing ring; 209. Piston rod; 210. Alloy coating; 211. Piston disc; 212. Piston rubber ring. Detailed Implementation

[0020] Embodiments of this disclosure will now be described in more detail with reference to the accompanying drawings. While some embodiments of this disclosure are shown in the drawings, it should be understood that this disclosure can be implemented in various forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided to provide a more thorough and complete understanding of this disclosure. It should be understood that the accompanying drawings and embodiments of this disclosure are for illustrative purposes only and are not intended to limit the scope of protection of this disclosure.

[0021] It should also be noted that, for ease of description, only the parts relevant to the utility model are shown in the accompanying drawings. Unless otherwise specified, the embodiments and features described in this disclosure can be combined with each other.

[0022] It should be noted that the concepts of "first" and "second" mentioned in this disclosure are used only to distinguish different devices, modules, or units, and are not used to limit the order of functions performed by these devices, modules, or units or their interdependencies. It should be noted that the terms "a" and "a plurality of" used in this disclosure are illustrative rather than restrictive, and those skilled in the art should understand that, unless otherwise expressly indicated in the context, they should be understood as "one or more".

[0023] This disclosure will now be described in detail with reference to the accompanying drawings and embodiments.

[0024] This utility model provides, for example Figure 1-6 The nitrogen spring shown includes a spring cylinder body 1, an anti-wear piston structure 2 fixed at one end of the spring cylinder body 1, the spring cylinder body 1 includes a cylinder shell 101, and a base 102 is fixed at the bottom end of the cylinder shell 101. An air inlet valve 103 is opened at the center of the base 102, and a nitrogen chamber 104 is connected to the top of the air inlet valve 103. A piston disc 211 is attached to the top of the nitrogen chamber 104, and a piston cavity 105 is opened inside the cylinder shell 101. To ensure the rebound and structural stability of this nitrogen spring during use, such as Figure 1-2 As shown, this nitrogen spring consists of a cylinder housing 101 and a piston ring 201. It can provide stable extension and retraction of the piston rod 209 through the piston chamber 105 inside the cylinder housing 101. At the same time, in conjunction with the intake valve 103 structure at the bottom, it can replenish the nitrogen in the nitrogen chamber 104 in a timely manner, which is conducive to ensuring sufficient nitrogen supply during long-term use and maintaining elastic stability.

[0025] like Figure 2-6 As shown, the wear-resistant piston structure 2 includes a piston ring 201, and an oil supply pipe 202 is fixed to one side of the outer wall of the piston ring 201. The end of the oil supply pipe 202 is threaded with a cap 203. An inner concave ring groove 204 is opened at the center of the front end of the piston ring 201. An inner ring cavity 205 extends from the inner wall of the inner concave ring groove 204. An oil storage cavity 206 is opened in the annular shape inside the piston ring 201. Balls 207 are embedded in the inner walls of the inner ring cavity 205. A sealing ring 208 is embedded at the bottom end of the inner ring cavity 205. A piston rod 209 is tightly fitted to the inner wall of the sealing ring 208. An alloy coating 210 is coated on the outer surface of the piston rod 209. A piston disc 211 is fixed at the bottom end of the piston rod 209. A piston rubber ring 212 is embedded in the outer walls of the piston disc 211. To reduce the impact of wear on piston rod 209, such as Figure 2-6 As shown, this nitrogen spring provides a contact and extension surface for the piston rod 209 through the inner ring cavity 205 built into the piston ring 201. The rolling ball 207 of the ring cloth provides rolling to reduce the impact of friction, while the sealing ring 208 maintains the gas sealing of the piston process. While the rolling ball 207 is rolling, it can evenly contact the lubricating oil in the oil reservoir 206, thereby providing lubrication to the surface of the piston rod 209 while rolling. There is no need for frequent manual operation to add oil, thus maximizing the reduction of wear and improving the efficiency and convenience of use. The alloy coating 210 on the surface of the piston rod 209 is made of Ni60CuMo alloy. This type of coating material is a high-performance wear-resistant coating material with nickel as the base and added elements such as chromium, copper, and molybdenum. It is composed of alternating overlapping chromium-rich and nickel-rich areas to form a dense layered structure. The porosity can be controlled below 2.5%, thereby improving the wear resistance and hardness during frictional contact.

[0026] In summary, when the nitrogen spring is in use, the piston rod 209 is first compressed, which causes the piston disc 211 at the bottom of the piston rod 209 to contract inward. At this time, the piston disc 211 squeezes the nitrogen chamber 104, and the nitrogen in the nitrogen chamber 104 stores energy after being compressed. When the piston rod 209 is no longer compressed, the stored nitrogen pushes the piston rod 209 out to rebound. During this process, the outer wall of the piston rod 209 contacts the inner ring cavity 205 of the piston ring 201 and slides in contact with the ball bearing 207. As the ball bearing 207 rolls, it applies the lubricating oil in the oil storage cavity 206 on the other side to the surface of the piston rod 209, forming a process of rebounding and lubrication at the same time.

[0027] The above description is merely a selection of preferred embodiments of this disclosure and an explanation of the technical principles employed. Those skilled in the art should understand that the scope of the utility model involved in the embodiments of this disclosure is not limited to the technical solutions formed by specific combinations of the above-described technical features, but should also cover other technical solutions formed by arbitrary combinations of the above-described technical features or their equivalents without departing from the above-described inventive concept. For example, technical solutions formed by substituting the above features with (but not limited to) technical features with similar functions disclosed in the embodiments of this disclosure.

Claims

1. A nitrogen spring with an anti-wear structure, comprising a spring cylinder body (1), characterized in that, One end of the spring cylinder body (1) is fixed with an anti-wear piston structure (2). The anti-wear piston structure (2) includes a piston ring (201), and an oil supply pipe (202) is fixed to one side of the outer wall of the piston ring (201). The end of the oil supply pipe (202) is threaded with a cap (203). An inner concave ring groove (204) is opened at the center of the front end of the piston ring (201). An inner ring cavity (205) extends from the inner wall of the inner concave ring groove (204). An oil storage chamber (206) is provided in the inner ring, and a ball bearing (207) is embedded in the inner wall of the inner ring chamber (205). A sealing ring (208) is embedded in the bottom end of the inner ring chamber (205), and a piston rod (209) is tightly fitted to the inner wall of the sealing ring (208). An alloy coating (210) is applied to the outer surface of the piston rod (209). A piston disc (211) is fixed to the bottom end of the piston rod (209), and a piston rubber ring (212) is embedded in the outer wall of the piston disc (211).

2. A nitrogen spring with an anti-wear structure according to claim 1, characterized in that, The piston ring (201) is integrally fixedly connected to the end of the spring cylinder body (1), and the concave annular groove (204) opened at the end of the piston ring (201) has an arc-shaped concave edge structure.

3. A nitrogen spring with an anti-wear structure according to claim 1, characterized in that, The oil storage chamber (206) is circumferentially opened along the inside of the piston ring (201), and one side of the oil storage chamber (206) is connected to the oil delivery pipe (202).

4. A nitrogen spring with an anti-wear structure according to claim 1, characterized in that, The inner ring cavity (205) is circumferentially opened along the inner wall of the piston ring (201), and the top end of the inner ring cavity (205) is extended and fixed to the inner concave ring groove (204).

5. A nitrogen spring with an anti-wear structure according to claim 1, characterized in that, The ball bearings (207) are distributed in a ring along the inner wall of the inner ring cavity (205), and the inner wall of the inner ring cavity (205) slides with the piston rod (209) through the ball bearings (207).

6. A nitrogen spring with an anti-wear structure according to claim 1, characterized in that, The inner wall of the ball bearing (207) is in contact with the oil storage cavity (206), and the oil storage cavity (206) is uniformly filled with lubricating oil.

7. A nitrogen spring with an anti-wear structure according to claim 1, characterized in that, The alloy coating (210) is uniformly applied along the outer wall of the piston rod (209), and the end of the piston rod (209) is fixedly connected to the piston disc (211).

8. A nitrogen spring with an anti-wear structure according to claim 1, characterized in that, The spring cylinder body (1) includes a cylinder shell (101), and a base (102) is fixed at the bottom of the cylinder shell (101). An air intake valve (103) is provided at the center of the base (102). A nitrogen chamber (104) is connected to the top of the air intake valve (103). A piston disc (211) is attached to the top of the nitrogen chamber (104). A piston cavity (105) is provided inside the cylinder shell (101).

9. A nitrogen spring with an anti-wear structure according to claim 8, characterized in that, The nitrogen chamber (104) is partially filled along the inside of the piston cavity (105), and the piston disc (211) is tightly fitted around the inner wall of the piston cavity (105).

10. A nitrogen spring with an anti-wear structure according to claim 8, characterized in that, The base (102) is fixedly connected to the bottom end of the cylinder shell (101), and the base (102) is connected to the inside of the nitrogen chamber (104) through the air intake valve (103).

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