Wear-resistant nitrogen spring

Abstract

The utility model discloses a wear-resistant nitrogen spring, and relates to the technical field of nitrogen springs. The bottom of the shell is communicated with an air valve, an inner cavity of the shell is in threaded connection with a sealing cover, an inner cavity of the sealing cover is fixedly connected with a piston rod, an inner cavity of the piston rod is in threaded connection with an ejector head, a groove is formed in the top of the ejector head, and an inner cavity of the ejector head is in threaded connection with an ejector rod. And the bottom of the ejector rod is fixedly connected with a first oil pressure plate. According to the abrasion-resistant nitrogen spring, through cooperation of the shell, the air valve, the sealing cover, the piston rod, the ejector head, the groove, the ejector rod, the first oil pressure plate, the oil overflow hole, the sealing ring, the limiting groove, the cushion block, the hexagonal groove, the fixing block and the second oil pressure plate, the problem that in the prior art, a nitrogen spring cannot effectively meet the abrasion-resistant condition of a piston, and the service life of the piston is prolonged is solved. Meanwhile, local parts of the nitrogen spring are inconvenient to replace and maintain.

Description

Technical Field

[0001] The utility model belongs to the technical field of nitrogen springs, in particular to a wear-resistant nitrogen spring. Background Art

[0002] Nitrogen spring is a new type of elastic component that uses high-pressure nitrogen as the working medium. It is small in size, has large elastic force, long stroke, stable operation, precision manufacturing, flat elastic curve, and does not require pre-tightening. It has the ability to perform tasks that are difficult to accomplish with conventional elastic components such as metal springs, rubber and air cushions.

[0003] Taking the existing nitrogen springs as an example, most of the existing nitrogen springs are non-detachable. Therefore, once the nitrogen spring is partially damaged, the entire spring needs to be replaced. Since the existing nitrogen springs cannot be partially replaced, the consumption cost of the nitrogen springs is increased. In addition, the existing nitrogen springs do not have an oil injection function, which cannot make the piston have good wear resistance.

[0004] To this end, we provide a wear-resistant nitrogen spring to solve the above problems. Utility Model Content

[0005] The purpose of the utility model is to provide a wear-resistant nitrogen spring. Through the cooperation of a housing, an air valve, a sealing cover, a piston rod, a push head, a groove, a push rod, a first oil pressure plate, an oil overflow hole, a sealing ring, a limit groove, a pad, a hexagonal groove, a fixing block and a second oil pressure plate, the utility model solves the problem that the nitrogen spring in the prior art cannot effectively meet the wear resistance requirements of the piston and is inconvenient to replace and repair local parts of the nitrogen spring.

[0006] In order to solve the above technical problems, the present invention is achieved through the following technical solutions.

[0007] The utility model is a wear-resistant nitrogen spring, comprising a shell, the bottom of the shell is connected to an air valve, the inner cavity of the shell is threadedly connected to a sealing cover, the inner cavity of the sealing cover is fixedly connected to a piston rod, the inner cavity of the piston rod is threadedly connected to a mandrel, the top of the mandrel is provided with a groove, the inner cavity of the mandrel is threadedly connected to a push rod, the bottom of the push rod is fixedly connected to a first oil pressure plate, and an oil overflow hole is provided in the annular groove on the surface of the piston rod.

[0008] The utility model is further configured such that a sealing ring is fixedly connected to the bottom of the sealing cover, the sealing ring is fixedly connected to the surface of the piston rod, and the side of the sealing ring close to the inner wall of the shell is fixedly connected to the inner wall of the shell.

[0009] The present invention is further configured such that four limiting grooves are provided on the top of the sealing cover.

[0010] The utility model is further configured such that a cushion block is clamped in the inner cavity of the groove, and the bottom of the cushion block is movably connected to the push rod.

[0011] The utility model is further configured such that a side of the push rod close to the inner wall of the groove is movably connected to the inner wall of the groove, and a hexagonal groove is provided on the top of the push rod.

[0012] The utility model is further configured such that six fixed blocks are fixedly connected to the bottom of the first oil pressure plate, a second oil pressure plate is fixedly connected between the bottoms of the six fixed blocks, and the first oil pressure plate and the second oil pressure plate are movably connected to the inner wall of the piston rod on one side close to the inner wall of the piston rod.

[0013] The utility model has the following beneficial effects.

[0014] 1. The utility model injects nitrogen into the interior of the shell through the air valve. When the shell is damaged, the user can use a special wrench to cooperate with the limiting groove on the sealing cover to rotate and remove the sealing cover, and then replace the shell. When the piston rod is in use, the inner cavity at the bottom of the piston rod is filled with lubricating oil. When the piston at the bottom of the piston rod has been used for a long time, the user can use a hexagonal wrench to rotate the push rod. At this time, the push rod will drive the first oil pressure plate, the fixed block and the second oil pressure plate to move downward. At this time, the lubricating oil at the bottom of the inner cavity of the piston rod will be squeezed into the annular groove on the surface of the piston rod through the oil overflow hole, thereby achieving the effect of helping to lubricate the piston rod, which can effectively increase the wear resistance of the piston rod.

[0015] 2. The utility model increases the sealing performance of the sealing cover by providing a sealing ring, and effectively prevents external dust from entering the inner cavity of the groove by providing a gasket. The coordinated use of the fixed block and the second oil pressure plate increases the balance of oil discharge from the oil overflow hole. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the technical solutions of the embodiments of the present utility model, the following briefly introduces the drawings required for describing the embodiments.

[0017] Figure 1 A three-dimensional diagram of a wear-resistant nitrogen gas spring.

[0018] Figure 2 A cross-sectional view of the housing of a wear-resistant nitrogen spring.

[0019] Figure 3 This is a partial structural cross-sectional view of a wear-resistant nitrogen spring.

[0020] Figure 4 A top view of the partial structure of a wear-resistant nitrogen spring.

[0021] In the accompanying drawings: 1. Housing; 2. Air valve; 3. Sealing cover; 4. Piston rod; 5. Push head; 6. Groove; 7. Push rod; 8. First oil pressure plate; 9. Oil overflow hole; 10. Sealing ring; 11. Limiting groove; 12. Pad; 13. Hexagonal groove; 14. Fixing block; 15. Second oil pressure plate. DETAILED DESCRIPTION

[0022] The technical solutions in the embodiments of the present invention will be described below in conjunction with the drawings in the embodiments of the present invention. The described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0023] Example 1

[0024] See also Figure 1-4 The utility model is a wear-resistant nitrogen spring, comprising a shell 1, the bottom of the shell 1 is connected to the air valve 2, the inner cavity of the shell 1 is threadedly connected to a sealing cover 3, the top of the sealing cover 3 is provided with four limiting grooves 11, the inner cavity of the sealing cover 3 is fixedly connected to a piston rod 4, the inner cavity of the piston rod 4 is threadedly connected to a head 5, the top of the head 5 is provided with a groove 6, the inner cavity of the head 5 is threadedly connected to a push rod 7, the side of the push rod 7 close to the inner wall of the groove 6 is movably connected to the inner wall of the groove 6, the top of the push rod 7 is provided with a hexagonal groove 13, the bottom of the push rod 7 is fixedly connected to a first oil pressure plate 8, and an oil overflow hole 9 is provided in the annular groove on the surface of the piston rod 4.

[0025] Specifically: nitrogen is injected into the interior of the shell 1 through the air valve 2. When the shell 1 is damaged, the user can use a special wrench to cooperate with the limit groove 11 on the sealing cover 3 to rotate and remove the sealing cover 3, and then the shell 1 can be replaced. When the piston rod 4 is in use, the inner cavity at the bottom of the piston rod 4 is filled with lubricating oil. When the piston at the bottom of the piston rod 4 has been used for a long time, the user can use a hexagonal wrench to rotate the push rod 7. At this time, the push rod 7 will drive the first oil pressure plate 8, the fixed block 14 and the second oil pressure plate 15 to move downward. At this time, the lubricating oil at the bottom of the inner cavity of the piston rod 4 will be squeezed into the annular groove on the surface of the piston rod 4 through the oil overflow hole 9, thereby achieving the effect of helping the piston rod 4 to lubricate, which can effectively increase the wear resistance of the piston rod 4.

[0026] Example 2

[0027] See also Figure 1-4On the basis of Example 1, a sealing ring 10 is fixedly connected to the bottom of the sealing cover 3, and the sealing ring 10 is fixedly connected to the surface of the piston rod 4. The side of the sealing ring 10 close to the inner wall of the shell 1 is fixedly connected to the inner wall of the shell 1, and the inner cavity of the groove 6 is clamped with a pad 12. The bottom of the pad 12 is movably connected to the push rod 7. The bottom of the first oil pressure plate 8 is fixedly connected to six fixed blocks 14, and the bottoms of the six fixed blocks 14 are fixedly connected to the second oil pressure plate 15. The first oil pressure plate 8 and the second oil pressure plate 15 are movably connected to the inner wall of the piston rod 4 on one side close to the inner wall of the piston rod 4.

[0028] Specifically: by setting the sealing ring 10, the sealing performance of the sealing cover 3 is increased; by setting the gasket 12, the gasket 12 effectively prevents external dust from entering the inner cavity of the groove 6; by setting the fixed block 14 and the coordinated use of the second oil pressure plate 15, the balance of oil outflow from the oil overflow hole 9 is increased.

[0029] The working principle of the present utility model is as follows: nitrogen is injected into the interior of the shell 1 through the air valve 2. When the shell 1 is damaged, the user can rotate and remove the sealing cover 3 with a special wrench in conjunction with the limit groove 11 on the sealing cover 3 to replace the shell 1. When the piston rod 4 is in use, the inner cavity at the bottom of the piston rod 4 is filled with lubricating oil. When the piston at the bottom of the piston rod 4 has been used for a long time, the user can rotate the push rod 7 with a hexagonal wrench. At this time, the push rod 7 will drive the first oil pressure plate 8, the fixed block 14 and the second oil pressure plate 15 to move downward. At this time, the lubricating oil at the bottom of the inner cavity of the piston rod 4 will be squeezed into the annular groove on the surface of the piston rod 4 through the oil overflow hole 9, thereby achieving the effect of helping the piston rod 4 to be lubricated, which can effectively increase the wear resistance of the piston rod 4.

[0030] The standard parts used in the present invention can all be purchased from the market, and can be customized according to the description in the specification and drawings. The specific connection methods of each part adopt conventional means such as mature bolts, rivets, welding, etc. in the existing technology. The machinery, parts and equipment all adopt conventional models in the existing technology. The control method is automatically controlled by a control unit. The control circuit of the control unit can be implemented by simple programming by technicians in this field, which is common knowledge in this field. Therefore, the control method and circuit connection are no longer explained in detail in the present invention.

[0031] The preferred embodiments of the present invention disclosed above are only used to help illustrate the present invention. The preferred embodiments do not describe all details in detail, nor do they limit the present invention to only the specific implementation methods described. This specification selects and specifically describes these embodiments in order to better explain the principles and practical applications of the present invention, so that technicians in the relevant technical field can better understand and utilize the present invention.

Claims

1. A wear-resistant nitrogen spring, comprising a housing (1), characterized in that: The bottom of the housing (1) is connected to an air valve (2), the inner cavity of the housing (1) is threadedly connected to a sealing cover (3), the inner cavity of the sealing cover (3) is fixedly connected to a piston rod (4), the inner cavity of the piston rod (4) is threadedly connected to a mandrel (5), the top of the mandrel (5) is provided with a groove (6), the inner cavity of the mandrel (5) is threadedly connected to a push rod (7), the bottom of the push rod (7) is fixedly connected to a first oil pressure plate (8), and an oil overflow hole (9) is provided in the annular groove on the surface of the piston rod (4).

2. The wear-resistant nitrogen gas spring according to claim 1, characterized in that: A sealing ring (10) is fixedly connected to the bottom of the sealing cover (3), and the sealing ring (10) is fixedly connected to the surface of the piston rod (4). The side of the sealing ring (10) close to the inner wall of the housing (1) is fixedly connected to the inner wall of the housing (1).

3. The wear-resistant nitrogen gas spring according to claim 1, characterized in that: Four limiting grooves (11) are provided on the top of the sealing cover (3).

4. The wear-resistant nitrogen gas spring according to claim 1, characterized in that: A cushion block (12) is clamped in the inner cavity of the groove (6), and the bottom of the cushion block (12) is movably connected to the top rod (7).

5. The wear-resistant nitrogen gas spring according to claim 1, characterized in that: The side of the push rod (7) close to the inner wall of the groove (6) is movably connected to the inner wall of the groove (6), and a hexagonal groove (13) is provided on the top of the push rod (7).

6. The wear-resistant nitrogen gas spring according to claim 1, characterized in that: The bottom of the first oil pressure plate (8) is fixedly connected to six fixed blocks (14), and the bottoms of the six fixed blocks (14) are fixedly connected to a second oil pressure plate (15). The first oil pressure plate (8) and the second oil pressure plate (15) are movably connected to the inner wall of the piston rod (4) on one side close to the inner wall of the piston rod (4).

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