Pressure spring auxiliary device of nitrogen spring

Abstract

The utility model relates to the technical field of nitrogen springs, and discloses a nitrogen spring pressure spring auxiliary device which comprises a cylinder body, a piston column is slidably connected to the interior of the cylinder body, a fixing plate is fixedly connected to the inner wall of the cylinder body, a sliding rod is slidably connected to the interior of the fixing plate, and a buffer plate is fixedly connected to the top end of the sliding rod. A first spring is fixedly connected to the lower surface of the buffer plate, rubber pads are arranged on the upper surface and the lower surface of the buffer plate, a telescopic rod is fixedly connected to the interior of the fixing plate, a square plate is fixedly connected to the top end of the telescopic rod, and a second spring is fixedly connected to the lower surface of the square plate. According to the utility model, through the cooperation of the fixing plate, the sliding rod, the buffer plate, the first spring, the rubber pad, the telescopic rod, the square plate and the second spring, the force generated by the movement of the piston column is absorbed in stages, the impact force borne by the cylinder body is effectively reduced, the service life of the nitrogen spring is prolonged, and the two-way auxiliary return stroke is carried out on the piston column.

Description

Technical Field

[0001] This utility model relates to the field of nitrogen spring technology, and in particular to a compression spring auxiliary device for nitrogen springs. Background Technology

[0002] A nitrogen spring is an elastic element that uses high-pressure nitrogen gas as its working medium. It typically consists of a sealed cylinder, piston rod, and regulating valve. Its principle is to store energy by compressing nitrogen gas. When an external force is applied, the gas is compressed, generating elastic force. After the external force disappears, the nitrogen gas expands and returns to its original position, thus providing stable and controllable buffering or support force. To ensure the stability of the nitrogen spring under high-speed or high-frequency operation, a compression spring auxiliary device is required.

[0003] The compression spring auxiliary device of nitrogen spring is a mechanical spring structure installed inside or outside the nitrogen spring. In the past, traditional devices mostly used single-stage compression springs or hard connection structures, which had a limited range of elastic deformation. This resulted in the inability to effectively absorb the impact force at the end of the piston rod when running at high speed or under heavy load, which easily led to collisions between the piston rod and the cylinder, resulting in wear. Utility Model Content

[0004] To overcome the above shortcomings, this utility model provides a nitrogen spring compression spring auxiliary device, which aims to improve the problem that traditional devices mostly use single-stage compression springs or hard connection structures, which have limited elastic deformation range and cannot effectively absorb the impact force of the piston column.

[0005] To achieve the above objectives, the present invention provides the following technical solution:

[0006] A nitrogen spring compression spring auxiliary device includes a cylinder body, a piston rod slidably connected inside the cylinder body, an inflation valve inside the cylinder body, a fixed plate fixedly connected to the inner wall of the cylinder body, a sliding rod slidably connected inside the fixed plate, the bottom end of the sliding rod slidably connected inside the cylinder body, a buffer plate fixedly connected to the top end of the sliding rod, a first spring fixedly connected to the lower surface of the buffer plate, the outer wall of the first spring fixedly connected to the upper surface of the fixed plate, rubber pads provided on both the upper and lower surfaces of the buffer plate, a telescopic rod fixedly connected inside the fixed plate, a square plate fixedly connected to the top end of the telescopic rod, a second spring fixedly connected to the lower surface of the square plate, the outer wall of the second spring fixedly connected to the upper surface of the fixed plate, and a dustproof component inside the cylinder body.

[0007] Preferably, the dustproof assembly includes a piston sleeve, the outer wall of which is fixedly connected to the inside of the cylinder, and the inside of which is slidably connected to the outer wall of the piston rod.

[0008] Preferably, a dustproof ring is provided inside the piston sleeve, and the outer wall of the dustproof ring is disposed on the inner wall of the cylinder.

[0009] Preferably, the outer wall of the cylinder is provided with a first outer shell and a second outer shell, the outer wall of the first outer shell is attached to the outer wall of the second outer shell, and both the first and second outer shells are provided with sealing strips inside, and both the outer walls of the first and second outer shells are provided on the outer wall of the piston rod.

[0010] Preferably, a hollow sleeve is fixedly connected to the upper surface of the second outer shell, and a T-shaped rod is slidably connected inside the hollow sleeve.

[0011] Preferably, a limiting rod is fixedly connected inside the T-shaped rod, and the outer walls of both the T-shaped rod and the limiting rod are slidably connected inside the outer casing.

[0012] Preferably, a disc is fixedly connected to the outer wall of the T-shaped rod, a spring is fixedly connected to the outer wall of the disc, and a convex sleeve is fixedly connected to the outer wall of the spring.

[0013] Preferably, the outer wall of the disc is slidably connected to the inner wall of the hollow sleeve, the outer wall of the convex sleeve is rotatably connected to the inside of the hollow sleeve, and the inside of the convex sleeve is slidably connected to the outer wall of the T-shaped rod.

[0014] This utility model has the following beneficial effects:

[0015] 1. In this utility model, through the cooperation between the fixed plate, sliding rod, buffer plate, spring one, rubber pad, telescopic rod, square plate and spring two, the force generated by the piston rod movement is absorbed in stages, effectively reducing the impact force on the cylinder, extending the service life of the nitrogen spring, and providing bidirectional auxiliary return of the piston rod, while also making the return of the piston rod smoother and improving the stability of the nitrogen spring operation.

[0016] 2. In this utility model, through the cooperation between the hollow sleeve, T-shaped rod, limiting rod, disc, spring three, convex sleeve and outer shell one, the outer shell one and outer shell two can be installed and disassembled without complicated tools or too much operation, which enhances the overall rigidity of the connection between the cylinder body and the piston column, and also prevents the connection between the cylinder body and the piston column from collision with foreign objects. Attached Figure Description

[0017] Figure 1 This is a perspective view of a compression spring auxiliary device for a nitrogen spring according to the present invention;

[0018] Figure 2 This is a cross-sectional schematic diagram of the internal structure of the cylinder of a nitrogen spring compression spring auxiliary device proposed in this utility model;

[0019] Figure 3 This is a partial structural diagram of the telescopic rod of a nitrogen spring compression spring auxiliary device proposed in this utility model;

[0020] Figure 4 This is a partial structural diagram of the sealing strip of a nitrogen spring compression spring auxiliary device proposed in this utility model;

[0021] Figure 5 This is a cross-sectional schematic diagram of the internal structure of the hollow sleeve of a nitrogen spring compression spring auxiliary device proposed in this utility model.

[0022] Legend:

[0023] 1. Cylinder block; 2. Piston rod; 3. Inflation valve; 4. Fixing plate; 5. Slide rod; 6. Buffer plate; 7. Spring 1; 8. Rubber pad; 9. Telescopic rod; 10. Square plate; 11. Spring 2; 12. Piston sleeve; 13. Dust seal; 14. Outer shell 1; 15. Outer shell 2; 16. Sealing strip; 17. Hollow sleeve; 18. T-shaped rod; 19. Limiting rod; 20. Disc; 21. Spring 3; 22. Convex sleeve. Detailed Implementation

[0024] 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.

[0025] Reference Figures 1-3 An embodiment of this utility model provides a nitrogen spring compression spring auxiliary device, including a cylinder body 1, a piston column 2 slidably connected inside the cylinder body 1, an inflation valve 3 provided inside the cylinder body 1, a fixing plate 4 fixedly connected to the inner wall of the cylinder body 1, a slide rod 5 slidably connected inside the fixing plate 4, the bottom end of the slide rod 5 slidably connected inside the cylinder body 1, a buffer plate 6 fixedly connected to the top end of the slide rod 5, a spring 7 fixedly connected to the lower surface of the buffer plate 6, the outer wall of the spring 7 fixedly connected to the upper surface of the fixing plate 4, rubber pads 8 provided on both the upper and lower surfaces of the buffer plate 6, a telescopic rod 9 fixedly connected inside the fixing plate 4, a square plate 10 fixedly connected to the top end of the telescopic rod 9, a spring 11 fixedly connected to the lower surface of the square plate 10, the outer wall of the spring 11 fixedly connected to the upper surface of the fixing plate 4, and a dustproof component provided inside the cylinder body 1;

[0026] Specifically, the nitrogen pressure inside the cylinder 1 can be adjusted by the inflation valve 3. Fixed plates 4 are provided on both the upper and lower sides inside the cylinder 1. When the seat ring at the bottom of the piston rod 2 moves up or down, the movement of the piston rod 2 and the seat ring is buffered in multiple stages to prevent the impact between the seat ring and the cylinder 1. The sliding rod 5 slides inside the fixed plate 4 and the cylinder 1 to limit the movement of the sliding rod 5. The elastic force of spring 7 is used to support the buffer plate 6 and spring 7. The elastic force of spring 11 is used to support the square plate 10. Rubber pads 8 are provided on both the upper and lower sides of the buffer plate 6 to reduce the wear between the piston rod 2 and the buffer plate 6, and between the buffer plate 6 and the square plate 10.

[0027] Reference Figure 2 The dustproof assembly includes a piston sleeve 12, the outer wall of which is fixedly connected to the inside of the cylinder body 1, and the inside of which is slidably connected to the outer wall of the piston rod 2; a dustproof ring 13 is provided inside the piston sleeve 12, and the outer wall of the dustproof ring 13 is provided on the inner wall of the cylinder body 1.

[0028] Specifically, the piston sleeve 12 limits the movement of the piston rod 2 to prevent accidental shaking, and the dust seal 13 is set at the connection between the piston sleeve 12 and the cylinder 1 to enhance the seal between the piston sleeve 12 and the cylinder 1.

[0029] Reference Figure 4 The outer wall of the cylinder 1 is provided with a first outer shell 14 and a second outer shell 15. The outer wall of the first outer shell 14 is attached to the outer wall of the second outer shell 15. Both the first outer shell 14 and the second outer shell 15 are provided with sealing strips 16. The outer walls of the first outer shell 14 and the second outer shell 15 are both provided on the outer wall of the piston column 2.

[0030] Specifically, short rods are provided on both outer walls of cylinder 1 to position the installation of outer shell 14 and outer shell 2 15, and also to limit the installation of outer shell 14 and outer shell 2 15. A sealing strip 16 is used to connect with outer shell 14 and outer shell 2 15 to prevent dust from entering the installation of outer shell 14 and outer shell 2 15. A certain gap is left between the outer walls of outer shell 14 and outer shell 2 15 and the outer wall of piston column 2 to reduce the wear of piston column 2.

[0031] Reference Figure 5A hollow sleeve 17 is fixedly connected to the upper surface of the outer shell 15, and a T-shaped rod 18 is slidably connected inside the hollow sleeve 17. A limiting rod 19 is fixedly connected inside the T-shaped rod 18, and the outer walls of both the T-shaped rod 18 and the limiting rod 19 are slidably connected to the inside of the outer shell 14. A disc 20 is fixedly connected to the outer wall of the T-shaped rod 18, and a spring 21 is fixedly connected to the outer wall of the disc 20. A convex sleeve 22 is fixedly connected to the outer wall of the spring 21. The outer wall of the disc 20 is slidably connected to the inner wall of the hollow sleeve 17, and the outer wall of the convex sleeve 22 is rotatably connected to the inside of the hollow sleeve 17. The inside of the convex sleeve 22 is slidably connected to the outer wall of the T-shaped rod 18.

[0032] Specifically, the hollow sleeve 17 is connected to the outer shell 15 via a fixing block. The hollow sleeve 17 restricts the sliding or rotation of the T-shaped rod 18. The hollow sleeve 17 and the T-shaped rod 18 provide support and limit the movement of the disc 20. The hollow sleeve 17 also limits the rotation of the convex sleeve 22. When the T-shaped rod 18 rotates, it drives the disc 20 and the spring 21 to rotate. The convex sleeve 22 rotates inside the hollow sleeve 17, preventing the spring 21 from deforming excessively during rotation, which would affect the use of the T-shaped rod 18.

[0033] Working principle: When using this device, the cylinder 1 is inflated by the inflation valve 3 to bring the cylinder 1 to a suitable pressure. When the piston rod 2 is working, it drives the seat ring at the bottom of the piston rod 2 to move downward. The rubber pad 8 reduces the impact of the seat ring on the buffer plate 6. The buffer plate 6 drives the slide rod 5 to move downward, so that the slide rod 5 slides into the cylinder 1 through the interior of the fixed plate 4. The spring 7 provides initial buffering for the movement of the piston rod 2 and the seat ring. When the buffer plate 6 contacts the square plate 10, the rubber pad 8 on the lower side of the buffer plate 6 reduces the impact of the buffer plate 6 on the square plate 10. The buffer plate 6 drives the square plate 10 to move downward, compressing the telescopic rod 9. The spring 11 further slows down the movement of the square plate 10 and the buffer plate 6, thereby further buffering the movement of the piston rod 2 and the seat ring. The piston sleeve 12 and the dustproof ring 13 prevent dust from entering the piston rod 2.

[0034] When protection is needed at the connection between cylinder 1 and piston rod 2, a short rod on the outer wall of cylinder 1 is used to position the installation of outer shell 14 and outer shell 25. First, the T-shaped rod 18 is pulled to the right, and the disc 20 presses against the spring 3 21 and the convex sleeve 22. The T-shaped rod 18 is rotated so that the limiting rod 19 is in the lateral position. Then, outer shell 14 and outer shell 25 are brought together, and the limiting rod 19 and T-shaped rod 18 are slid into the interior of outer shell 14. Then, the T-shaped rod 18 is released, and under the action of spring 3 21, the limiting rod 19 and T-shaped rod 18 rotate. At the same time, the limiting rod 19 presses against the interior of outer shell 14. During use, this device not only provides multi-stage buffering for the movement of piston rod 2 and improves the smoothness of piston rod 2 operation, but also enables quick installation and disassembly of outer shell 14 and outer shell 25, and protects the connection between cylinder 1 and piston rod 2.

[0035] Finally, it should be noted that the above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A compression spring assist device for a nitrogen gas spring comprising a cylinder (1), characterized in that: The inside of the cylinder (1) is slidably connected with a piston column (2), the inside of the cylinder (1) is provided with an inflation valve (3), the inner wall of the cylinder (1) is fixedly connected with a fixed plate (4), the inside of the fixed plate (4) is slidably connected with a sliding rod (5), the bottom end of the sliding rod (5) is slidably connected in the inside of the cylinder (1), the top end of the sliding rod (5) is fixedly connected with a buffer plate (6), the lower surface of the buffer plate (6) is fixedly connected with a spring one (7), the outer wall of the spring one (7) is fixedly connected to the upper surface of the fixed plate (4), the upper and lower surfaces of the buffer plate (6) are provided with rubber pads (8), the inside of the fixed plate (4) is fixedly connected with a telescopic rod (9), the top end of the telescopic rod (9) is fixedly connected with a square plate (10), the lower surface of the square plate (10) is fixedly connected with a spring two (11), the outer wall of the spring two (11) is fixedly connected to the upper surface of the fixed plate (4), and the inside of the cylinder (1) is provided with a dustproof assembly.

2. A compression spring assist device for a nitrogen gas spring according to claim 1, characterized in that: The dustproof assembly comprises a piston sleeve (12), and the outer wall of the piston sleeve (12) is fixedly connected to the inside of the cylinder (1).

3. A compression spring assist device for a nitrogen gas spring according to claim 2, characterized in that: The inside of the piston sleeve (12) is provided with a dustproof ring (13), and the outer wall of the dustproof ring (13) is arranged on the inner wall of the cylinder (1).

4. The compression spring assist device for a nitrogen gas spring of claim 1, wherein: The outer wall of the cylinder (1) is provided with an outer shell one (14) and an outer shell two (15), the outer wall of the outer shell one (14) is attached to the outer wall of the outer shell two (15), the inside of the outer shell one (14) and the outer shell two (15) is provided with a sealing strip (16), and the outer wall of the outer shell one (14) and the outer shell two (15) is arranged on the outer wall of the piston column (2).

5. A compression spring assist device for a nitrogen gas spring according to claim 4, characterized in that: The upper surface of the outer shell two (15) is fixedly connected with a hollow sleeve (17), and the inside of the hollow sleeve (17) is slidably connected with a T-shaped rod (18).

6. A compression spring assist device for a nitrogen gas spring according to claim 5, characterized in that: The inside of the T-shaped rod (18) is fixedly connected with a limiting rod (19), and the outer walls of the T-shaped rod (18) and the limiting rod (19) are slidably connected in the inside of the outer shell one (14).

7. The compression spring assist device for a nitrogen gas spring of claim 5, wherein: The outer wall of the T-shaped rod (18) is fixedly connected with a disc (20), the outer wall of the disc (20) is fixedly connected with a spring three (21), the outer wall of the spring three (21) is fixedly connected with a convex sleeve (22).

8. A compression spring assist device for a nitrogen gas spring according to claim 7, characterized in that: The outer wall of the disc (20) is slidably connected to the inner wall of the hollow sleeve (17), the outer wall of the convex sleeve (22) is rotatably connected to the inside of the hollow sleeve (17), and the inside of the convex sleeve (22) is slidably connected to the outer wall of the T-shaped rod (18).

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