High-sealing type nitrogen spring shock absorber

Abstract

The utility model discloses a high-sealing type nitrogen spring shock absorber. The high-sealing type nitrogen spring shock absorber comprises a cylinder body, a guide sleeve is arranged in a round opening in the upper end of the cylinder body, a piston rod is slidably connected into the guide sleeve, a top seat is arranged at the upper end of the piston rod, a spring is arranged between the cylinder body and the top seat, the spring is movably connected with the outer side of the cylinder body in a sleeved mode, and an air nozzle is installed in the middle of the inner wall of the cylinder body. The inner wall of the first sealing ring makes contact with the outer side face of the piston rod, a limiting ring and a conical ring which are vertically and symmetrically distributed are arranged on the inner wall of the guide sleeve, and conical sealing gaskets are arranged on the side, away from the center of the guide sleeve, of the limiting ring through evenly-distributed telescopic columns. The gap between the piston rod and the guide sleeve is fully sealed through multi-stage sealing, the sealing effect is good, meanwhile, the stroke of the piston rod is adjusted by adjusting and controlling the initial occupied volume of nitrogen, and use is convenient.

Description

Technical Field

[0001] The utility model relates to the technical field of shock absorbers, in particular to a highly sealed nitrogen spring shock absorber. Background Art

[0002] The nitrogen spring is a new type of elastic component that uses high-pressure nitrogen as the working medium. It can easily achieve constant pressure and delayed action in the system. It is a new generation of the most ideal elastic component with flexible performance. It is small in size, large in elasticity, long in stroke, stable in operation, precisely manufactured, long in service life, with a gentle elasticity curve, and no need for pre-tightening, etc. When some nitrogen spring shock absorbers are used, the piston rod is pressed to move inside the guide sleeve on the cylinder body of the device, the spring contracts, the volume of nitrogen inside the cylinder body decreases, and the pressure increases, thereby using the spring elastic force to perform nitrogen spring shock absorption. However, the piston rod and the guide sleeve are sealed by a sealing ring, and the sealing structure is single, and the sealing effect on the gap between the piston rod and the guide sleeve is limited. At the same time, the device structure is fixed, and the stroke of the piston rod cannot be adjusted according to demand, which is inconvenient to use. Utility Model Content

[0003] The technical problem to be solved by the utility model is to overcome the existing defects and provide a high-sealing nitrogen spring shock absorber. The device fully seals the gap between the piston rod and the guide sleeve through multi-stage sealing, and the sealing effect is good. At the same time, the device adjusts the stroke of the piston rod by regulating the initial occupied volume of nitrogen. It is easy to use and can effectively solve the problems in the background technology.

[0004] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a highly sealed nitrogen spring shock absorber, comprising a cylinder body;

[0005] Cylinder body: A guide sleeve is provided in the circular opening at the upper end thereof, a piston rod is slidably connected inside the guide sleeve, a top seat is provided at the upper end of the piston rod, a spring is provided between the cylinder body and the top seat, the spring is movably sleeved with the outer side of the cylinder body, a gas nozzle is installed in the middle of the inner wall of the cylinder body, a sealing ring 1 is provided at the inner upper end of the guide sleeve, the inner wall of the sealing ring 1 contacts the outer side surface of the piston rod, the device fully seals the gap between the piston rod and the guide sleeve through multi-stage sealing, and has a good sealing effect. At the same time, the device adjusts the stroke of the piston rod by regulating the initial occupied volume of nitrogen, and is easy to use.

[0006] Furthermore, the inner wall of the guide sleeve is provided with a limit ring and a conical ring which are vertically symmetrically distributed. A conical sealing gasket is provided on one side of the limit ring away from the center of the guide sleeve through evenly distributed telescopic columns. The conical sealing gasket is respectively installed in cooperation with the conical ring and the piston rod to perform a second stage of sealing on the gap between the piston rod and the guide sleeve.

[0007] Furthermore, evenly distributed micro springs are provided between the limit ring and the adjacent conical sealing pad, and the micro springs are movably sleeved with the outer ends of the adjacent telescopic columns to limit the vertical movement of the conical sealing pad.

[0008] Furthermore, a scraper ring is provided at the upper end of the guide sleeve, and the scraper ring is installed in cooperation with the piston rod to scrape off impurities adhered to the outer side of the piston rod.

[0009] Furthermore, the bottom wall of the cylinder body is rotatably connected to a stud via a bearing, the upper end of the stud is threadedly connected to a threaded barrel, the upper end of the threaded barrel is provided with an adjustment plate, the lower end of the inner wall of the cylinder body is rotatably connected to an adjustment shaft via a sealed bearing, a regulating groove is provided on the right side of the regulating shaft, the left end of the regulating shaft and the lower end of the stud are both provided with bevel gears, the bevel gears are meshed and connected, the initial state volume of the nitrogen is regulated, and the stroke distance of the piston rod is indirectly regulated.

[0010] Furthermore, a second sealing ring is provided on the outer side of the adjustment plate, and the second sealing ring is installed in cooperation with the cylinder body to reduce the gap between the adjustment plate and the inner wall of the cylinder body to prevent nitrogen from passing through the gap.

[0011] Furthermore, a telescopic rod is provided on the bottom wall of the cylinder body, and the telescopic end of the telescopic rod is fixedly connected to the lower surface of the adjustment plate to prevent the adjustment plate from rotating during the vertical movement.

[0012] Compared with the prior art, the utility model has the following advantages:

[0013] 1. The outer side of the piston rod contacts and slides down along the inner side of the sealing ring 1, and the first stage of sealing is performed between the piston rod and the guide sleeve through the sealing ring 1. As the piston rod moves downward, the outer side thereof drives the lower conical sealing gasket to move vertically downward through the contact friction force, and the lower conical sealing gasket moves downward along the inner edge slope of the conical ring and gradually squeezes toward the middle, so that the adhesion between the lower conical sealing gasket and the outer side of the piston rod is gradually strengthened, thereby improving the sealing effect, thereby performing the second stage of sealing between the piston rod and the guide sleeve, and the sealing effect is good. The high-sealing nitrogen spring shock absorber fully seals the gap between the piston rod and the guide sleeve through multi-stage sealing, and the sealing effect is good.

[0014] 2. The external chuck is plugged into the regulating groove and drives the regulating shaft to rotate. The regulating shaft is meshed and connected between the bevel gears to rotate the stud. The stud is threadedly connected so that the threaded tube drives the regulating plate to move vertically along the inner wall of the cylinder body, thereby regulating the volume occupied by the initial state of the nitrogen inside the cylinder body, and then indirectly adjusting the stroke of the piston rod. It is easy to use. During this process, the telescopic end of the telescopic rod adaptively retracts vertically with the regulating plate, thereby avoiding self-rotation during the vertical movement of the regulating plate. The regulating plate slides vertically along the inner wall of the cylinder body through the second sealing ring, thereby avoiding the nitrogen at the upper end of the cylinder body from moving to the lower end of the regulating plate through the gap between the regulating plate and the cylinder body. The high-sealing nitrogen spring shock absorber adjusts the stroke of the piston rod by regulating the initial volume occupied by nitrogen, which is easy to use. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a schematic diagram of the structure of the utility model;

[0016] Figure 2 It is a schematic diagram of the overall structure of the utility model;

[0017] Figure 3 This is an enlarged structural diagram of the utility model at A;

[0018] Figure 4 This is an enlarged structural diagram of point B of the utility model.

[0019] In the figure: 1 cylinder body, 2 guide sleeve, 3 piston rod, 4 top seat, 5 spring, 6 air nozzle, 7 sealing ring 1, 8 limit ring, 9 telescopic column, 10 micro spring, 11 conical sealing gasket, 12 conical ring, 13 scraper ring, 14 stud, 15 threaded cylinder, 16 adjustment plate, 17 sealing ring 2, 18 adjustment shaft, 19 bevel gear, 20 control groove, 21 telescopic rod. DETAILED DESCRIPTION

[0020] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0021] See also Figure 1-4 , This embodiment provides a technical solution: a high-sealing nitrogen spring shock absorber, comprising a cylinder 1;

[0022] Cylinder body 1: A guide sleeve 2 is provided in the circular opening at the upper end thereof, a piston rod 3 is slidably connected inside the guide sleeve 2, a top seat 4 is provided at the upper end of the piston rod 3, a spring 5 is provided between the cylinder body 1 and the top seat 4, the spring 5 is movably sleeved with the outer side of the cylinder body 1, a gas nozzle 6 is installed at the middle of the inner wall of the cylinder body 1, a sealing ring 7 is provided at the inner upper end of the guide sleeve 2, the inner wall of the sealing ring 7 contacts the outer side of the piston rod 3, a limiting ring 8 and a conical ring 12 are provided on the inner wall of the guide sleeve 2 which are vertically symmetrically distributed, a conical sealing gasket 11 is provided on the side of the limiting ring 8 away from the center of the guide sleeve 2 through evenly distributed telescopic columns 9, and the conical sealing gasket 11 They are respectively installed in cooperation with the conical ring 12 and the piston rod 3. Evenly distributed micro springs 10 are arranged between the limit ring 8 and the adjacent conical sealing gasket 11. The micro springs 10 are movably sleeved with the outer ends of the adjacent telescopic columns 9. A scraper ring 13 is arranged on the upper end of the guide sleeve 2. The scraper ring 13 is installed in cooperation with the piston rod 3. During the shock absorption process of the device, the top seat 4 is compressed, the piston rod 3 slides vertically along the guide sleeve 2, the spring 5 shrinks elastically, and the volume of nitrogen in the cylinder body 1 shrinks, thereby performing elastic shock absorption. The outer side of the piston rod 3 slides down along the inner side of the sealing ring 7, and the sealing ring 7 is used to contact the piston rod 3 and the guide sleeve 2. The first stage of sealing is performed between the guide sleeve 2. As the piston rod 3 moves downward, its outer side drives the lower conical sealing gasket 11 to move vertically downward through contact friction. The lower conical sealing gasket 11 moves downward along the inner edge slope of the conical ring 12 and gradually squeezes toward the middle, so that the adhesion between the lower conical sealing gasket 11 and the outer side of the piston rod 3 is gradually strengthened, thereby improving the sealing effect, thereby performing the second stage of sealing between the piston rod 3 and the guide sleeve 2, and the sealing effect is good. In this process, the telescopic end of the telescopic column 9 and the micro spring 10 are adaptively extended or relaxed, and the micro spring 10 is used to press the conical sealing gasket 1 1 is appropriately restricted. When the piston rod 3 moves upward along the guide sleeve 2, the upper conical sealing pad 11 and the upper conical ring 12 perform the second stage sealing on the piston rod 3 through the same principle. When the piston rod 3 moves vertically downward, its outer side contacts the upper end of the scraper ring 113. The scraper ring 13 scrapes off the impurities adhering to the outer side of the piston rod 3 to avoid affecting the inside of the device. Nitrogen can be transported to the inside of the device through the air nozzle 6. The high-sealing nitrogen spring shock absorber fully seals the gap between the piston rod 3 and the guide sleeve 2 through multi-stage sealing, and the sealing effect is good.

[0023] Among them, the bottom wall of the cylinder body 1 is rotatably connected with a stud 14 through a bearing, and the upper end of the stud 14 is threadedly connected with a threaded barrel 15, and the upper end of the threaded barrel 15 is provided with an adjusting plate 16. The lower end of the inner wall of the cylinder body 1 is rotatably connected with an adjusting shaft 18 through a sealed bearing, and a regulating groove 20 is opened on the right side of the adjusting shaft 18. The left end of the adjusting shaft 18 and the lower end of the stud 14 are both provided with a bevel gear 19, and the bevel gears 19 are meshingly connected. A sealing ring 21 is provided on the outer side of the adjusting plate 16, and the sealing ring 21 is installed in conjunction with the cylinder body 1. A telescopic rod 21 is provided on the bottom wall of the cylinder body 1, and the telescopic end of the telescopic rod 21 is fixedly connected to the lower surface of the adjusting plate 16, and is plugged into the regulating groove 20 through an external chuck and drives the adjusting shaft 18 to rotate. The adjusting shaft 18 is meshingly connected between the bevel gears 19 so that The stud 14 is rotated, and the stud 14 is threadedly connected so that the threaded tube 15 drives the adjusting plate 16 to move vertically along the inner wall of the cylinder body 1, thereby adjusting the volume occupied by the initial state of the nitrogen inside the cylinder body 1, and then indirectly adjusting the stroke of the piston rod 3, which is convenient to use. During this process, the telescopic end of the telescopic rod 21 adaptively vertically telescopes with the adjusting plate 16, thereby avoiding the self-rotation of the adjusting plate 16 during the vertical movement process. The adjusting plate 16 slides vertically along the inner wall of the cylinder body 1 through the sealing ring 17, thereby avoiding the nitrogen at the upper end of the cylinder body 1 from moving to the lower end of the adjusting plate 16 through the gap between the adjusting plate 16 and the cylinder body 1. The high-sealing nitrogen spring shock absorber adjusts the stroke of the piston rod 3 by adjusting the initial occupied volume of nitrogen, which is convenient to use.

[0024] The working principle of a high-sealing nitrogen spring shock absorber provided by the utility model is as follows: during the shock absorption process of the device, the top seat 4 is compressed, the piston rod 3 slides vertically along the guide sleeve 2, the spring 5 elastically contracts, and the volume of nitrogen in the cylinder 1 shrinks, thereby performing elastic shock absorption, and the outer side of the piston rod 3 slides down along the inner side of the sealing ring 7, and the first stage of sealing is performed between the piston rod 3 and the guide sleeve 2 through the sealing ring 7. As the piston rod 3 moves downward, its outer side drives the lower conical sealing pad 11 to move vertically downward through the contact friction force, and the lower side The conical sealing gasket 11 moves downward along the inner edge slope of the conical ring 12 and is gradually squeezed and brought closer to the middle, so that the adhesion between the conical sealing gasket 11 on the lower side and the outer side of the piston rod 3 is gradually strengthened, thereby improving the sealing effect, thereby performing the second stage of sealing between the piston rod 3 and the guide sleeve 2, and the sealing effect is good. During this process, the telescopic end of the telescopic column 9 and the micro spring 10 are adaptively extended or relaxed, and the vertical movement trend of the conical sealing gasket 11 is appropriately restricted by the micro spring 10. When the piston rod 3 moves upward along the guide sleeve 2, the conical sealing gasket 11 on the upper side is The gasket 11 and the conical ring 12 on the upper side perform the second stage sealing on the piston rod 3 by the same principle. During the vertical downward movement of the piston rod 3, its outer side contacts the upper end of the scraper ring 113, and the impurities adhering to the outer side of the piston rod 3 are scraped off by the scraper ring 13 to avoid affecting the inside of the device. Nitrogen can be delivered to the inside of the device through the air nozzle 6. The external chuck is plugged into the regulating groove 20 and drives the regulating shaft 18 to rotate. The regulating shaft 18 is meshed and connected between the bevel gears 19 to rotate the stud 14. The stud 14 is threadedly connected to the threaded cylinder 15 drives the adjusting plate 16 to move vertically along the inner wall of the cylinder body 1, thereby regulating the volume occupied by the initial state of the nitrogen inside the cylinder body 1, and then indirectly regulating the stroke of the piston rod 3, which is convenient to use. During this process, the telescopic end of the telescopic rod 21 adaptively vertically telescopes along with the adjusting plate 16, thereby preventing the adjusting plate 16 from rotating during the vertical movement process. The adjusting plate 16 slides vertically along the inner wall of the cylinder body 1 through the sealing ring 17, thereby preventing the nitrogen at the upper end of the cylinder body 1 from moving to the lower end of the adjusting plate 16 through the gap between the adjusting plate 16 and the cylinder body 1.

[0025] The above description is only an embodiment of the present invention, and does not limit the patent scope of the present invention. Any equivalent structure or equivalent process transformation made by using the contents of the specification and drawings of the present invention, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present invention.

Claims

1. A highly sealed nitrogen spring shock absorber, characterized in that: comprising a cylinder body (1); Cylinder body (1): A guide sleeve (2) is provided in the circular opening at the upper end thereof, a piston rod (3) is slidably connected inside the guide sleeve (2), a top seat (4) is provided at the upper end of the piston rod (3), a spring (5) is provided between the cylinder body (1) and the top seat (4), the spring (5) is movably sleeved with the outer side of the cylinder body (1), a gas nozzle (6) is installed in the middle of the inner wall of the cylinder body (1), a sealing ring (7) is provided at the upper end of the inner part of the guide sleeve (2), and the inner wall of the sealing ring (7) is in contact with the outer side surface of the piston rod (3).

2. A highly sealed nitrogen spring shock absorber according to claim 1, characterized in that: The inner wall of the guide sleeve (2) is provided with a limit ring (8) and a conical ring (12) which are vertically symmetrically distributed. A conical sealing gasket (11) is provided on one side of the limit ring (8) away from the center of the guide sleeve (2) via evenly distributed telescopic columns (9). The conical sealing gasket (11) is respectively mounted in cooperation with the conical ring (12) and the piston rod (3).

3. A highly sealed nitrogen spring shock absorber according to claim 2, characterized in that: Evenly distributed micro springs (10) are provided between the limiting ring (8) and the adjacent conical sealing pad (11), and the micro springs (10) are movably sleeved with the outer ends of the adjacent telescopic columns (9).

4. A highly sealed nitrogen spring shock absorber according to claim 1, characterized in that: A scraper ring (13) is provided at the upper end of the guide sleeve (2), and the scraper ring (13) is mounted in cooperation with the piston rod (3).

5. The high-sealing nitrogen spring shock absorber according to claim 1, characterized in that: The bottom wall of the cylinder body (1) is rotatably connected to a stud (14) via a bearing, the upper end of the stud (14) is threadedly connected to a threaded barrel (15), the upper end of the threaded barrel (15) is provided with an adjustment plate (16), the lower end of the inner wall of the cylinder body (1) is rotatably connected to an adjustment shaft (18) via a sealed bearing, a regulating groove (20) is provided on the right side of the adjustment shaft (18), and the left end of the adjustment shaft (18) and the lower end of the stud (14) are both provided with bevel gears (19), and the bevel gears (19) are meshingly connected.

6. A highly sealed nitrogen spring shock absorber according to claim 5, characterized in that: A second sealing ring (17) is provided on the outer side of the adjustment plate (16), and the second sealing ring (17) is mounted in cooperation with the cylinder body (1).

7. A highly sealed nitrogen spring shock absorber according to claim 5, characterized in that: A telescopic rod (21) is provided on the bottom wall of the cylinder body (1), and the telescopic end of the telescopic rod (21) is fixedly connected to the lower surface of the adjustment plate (16).

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