Double-section type nitrogen spring structure

Abstract

The utility model discloses a double-section type nitrogen spring structure and relates to the technical field of nitrogen springs, a second air cylinder is embedded in the upper end of a cylinder body of a first air cylinder, a piston rod penetrates through the second air cylinder and extends into the cylinder body of the first air cylinder, a first nitrogen cavity is formed in the cylinder body of the first air cylinder, and a second nitrogen cavity is formed in the cylinder body of the first air cylinder. A supporting rod of the piston rod is provided with a first piston internally provided with a first nitrogen cavity, a second nitrogen cavity is formed in a cylinder body of the second air cylinder, and a supporting rod of the piston rod is provided with a second piston internally provided with a second nitrogen cavity. According to the double-section type nitrogen spring, based on the fact that the two air cylinders serve as compression stress carriers, when the nitrogen spring is stressed and compressed, the piston rods of the nitrogen spring are compressed and displace, the two pistons on the supporting rods of the nitrogen spring are driven to synchronously and elastically compress along nitrogen cavities in the two air cylinders, the nitrogen spring is elastically stretched out and drawn back in a two-section stress and integrated linkage compression mode, compression stress is smoother, and the service life of the nitrogen spring is prolonged. And the telescopic stroke is more continuous and stable.

Description

TECHNICAL FIELD

[0001] The utility model relates to nitrogen spring field especially relates to a two -section type nitrogen spring structure. BACKGROUND

[0002] Nitrogen spring is a kind of elastic element with high-pressure nitrogen as working medium, with small volume, big elastic force, long stroke, stable work, precision manufacture and long service life etc., with the development demand of nitrogen spring, more and more types of nitrogen spring are produced and applied, among them, two-section type nitrogen spring is widely used because of its double buffering characteristics, such as the two-section type nitrogen spring (publicity announcement number CN208982569U) shown in Chinese patent network, the two-section type nitrogen spring of this type, by improving one piston rod of traditional nitrogen spring into two piston rods, the upper piston rod only plays the role of pure piston rod, the lower piston rod plays the role of piston rod and shell, effectively increases the use stroke of nitrogen spring, and by installing the pressure plate, the stress surface is increased, so that the piston rod pressure and the return force of nitrogen spring are more stable.

[0003] However, the two-section type nitrogen spring of the above-mentioned published patent and existing market still has some deficiencies: the two-section type piston rod compression deformation mode is adopted, the two-section type piston rod cannot guarantee stable integrated compression when being stressed and compressed, which leads to poor compression stress stability, and the compression is unstable. Therefore, the technical personnel in the art provide a two-section type nitrogen spring structure to solve the problems in the above background art. UTILITY MODEL CONTENTS

[0004] In view of the deficiencies of the prior art, the utility model provides a two-section type nitrogen spring structure, which solves the problem of unstable compression of the existing two-section type nitrogen spring in the above background art.

[0005] To achieve the above object, the utility model is realized by the following technical scheme: a two-section type nitrogen spring structure, comprising: a first cylinder;Second cylinder, the second cylinder is embedded on the upper end of the cylinder body of the first cylinder;Piston rod, the piston rod extends to the inside of the cylinder body of the first cylinder through the second cylinder;The inside of the cylinder body of the first cylinder is provided with a first nitrogen cavity, and the support rod of the piston rod is provided with a first piston embedded with the first nitrogen cavity;The inside of the cylinder body of the second cylinder is provided with a second nitrogen cavity, and the support rod of the piston rod is provided with a second piston embedded with the second nitrogen cavity.

[0006] As a further technical scheme of the utility model: the first nitrogen cavity and the second nitrogen cavity are independently arranged in the chamber.

[0007] As a further technical scheme of the utility model: the cylinder body of first air cylinder is internally provided with not less than one group of pressure relief cavities along its circumference, and the pressure relief cavities and first nitrogen cavity are mutually communicated.

[0008] As a further technical scheme of the utility model: the top end of the piston rod is provided with a first lug, the bottom end of the cylinder body of first air cylinder is provided with a telescopic rod assembly, and the other end of the telescopic rod assembly is provided with a second lug.

[0009] As a further technical scheme of the utility model: the telescopic rod assembly comprises a telescopic sleeve, and the two ends of the telescopic sleeve are screwed with two groups of telescopic screws with the screw teeth being arranged in positive and reverse directions.

[0010] As a further technical scheme of the utility model: the two end sleeve openings of the telescopic sleeve are provided with positioning wire sleeves; and the telescopic screw is screwed with a positioning nut matched with the positioning wire sleeve along the screw rod direction.

[0011] As a further technical scheme of the utility model: one side of the screw body of the positioning nut is provided with a propelling wire tooth matched with the telescopic screw, and the other side of the screw body of the positioning nut is provided with a positioning wire tooth matched with the positioning wire sleeve.

[0012] The utility model provides a kind of double-section nitrogen gas spring structure, and compared with prior art has the following beneficial effects:

[0013] 1. The double-section nitrogen gas spring of the design, based on two groups of cylinders as compression force carrier, when nitrogen gas spring is compressed, its piston rod compression displacement, and drive the two groups of pistons on its support rod along the nitrogen cavity in two groups of cylinders synchronous elastic compression, with two sections of force, integrated linkage compression mode elastic expansion, its compression force is more gentle, and expansion stroke is more continuous, stable.

[0014] 2. The double-section nitrogen gas spring of the design, based on the telescopic adjustment characteristics of telescopic sleeve, the initial installation length of double-section nitrogen gas spring can be pre-adjusted and calibrated, to better adapt to the complex installation environment of site, and flexible assembly is better. DRAWINGS

[0015] Figure 1 It is a structure schematic view of a double-section nitrogen gas spring structure;

[0016] Figure 2 It is a first sectional view of a double-section nitrogen gas spring structure;

[0017] Figure 3 It is a second sectional view of a double-section nitrogen gas spring structure;

[0018] Figure 4 It is a structure schematic view of telescopic sleeve in a double-section nitrogen gas spring structure.

[0019] Figure 5 It is a partial sectional view of the telescopic sleeve in the double-section nitrogen spring structure.

[0020] Figure 6 It is an exploded view of the telescopic sleeve in the double-section nitrogen spring structure.

[0021] In the figure: 1, first cylinder; 2, second cylinder; 3, piston rod; 4, first lug; 5, telescopic rod assembly; 51, telescopic sleeve; 511, positioning wire sleeve; 52, positioning nut; 521, advancing wire tooth; 522, positioning wire tooth; 53, telescopic screw; 6, second lug; 7, second piston; 8, second nitrogen cavity; 9, first piston; 10, first nitrogen cavity; 11, pressure relief cavity. DETAILED DESCRIPTION

[0022] The technical solutions in the embodiments of the utility model will be clearly and completely described below with reference to the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, rather than all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the utility model.

[0023] Please refer to Figures 1-6 The utility model provides a double-section nitrogen spring structure technical scheme: a double-section nitrogen spring structure, including first cylinder 1, second cylinder 2, second cylinder 2 is embedded in the upper end of the cylinder body of first cylinder 1, piston rod 3, piston rod 3 extends to the inside of the cylinder body of first cylinder 1 through second cylinder 2, and is integrally arranged by embedding of first cylinder 1 and second cylinder 2, and has good compact structure characteristics under the through telescopic of piston rod 3, is more suitable for complex and changeable installation environment while the anti-interference ability to outside is higher, and the overall space occupation is smaller.

[0024] The supporting rod of piston rod 3 is provided with first piston 9 embedded with first nitrogen cavity 10, and the supporting rod of piston rod 3 is provided with second piston 7 embedded with second nitrogen cavity 8, when piston rod 3 is compressed under force, first piston 9 and second piston 7 on piston rod 3 are sequentially and synchronously elastically compressed in first nitrogen cavity 10 in first cylinder 1 and second nitrogen cavity 8 in second cylinder 2, forming a split compression buffer in the form of integrated linkage.

[0025] The cylinder body of the first cylinder 1 is internally provided with a first nitrogen cavity 10, and the cylinder body of the second cylinder 2 is internally provided with a second nitrogen cavity 8; the first nitrogen cavity 10 and the second nitrogen cavity 8 are independently arranged; the independent arrangement of the first nitrogen cavity 10 and the second nitrogen cavity 8 enables the nitrogen spring to have a double-section elastic buffering characteristic; and the two groups of pistons on the piston rod 3 are synchronously compressed in an integrated linkage mode along the two groups of nitrogen cavities, so that the elastic compression of the double-section nitrogen spring is more stable, the stretching and contracting stress area is larger, and the stretching and contracting stability is better.

[0026] The cylinder body of the first cylinder 1 is internally provided with not less than one group of pressure relief cavities 11 along the circumference thereof, and the pressure relief cavities 11 are in communication with the first nitrogen cavity 10; by arranging the pressure relief cavities 11 in communication with the first nitrogen cavity 10 in the first cylinder 1, the problem of insufficient compression space caused by the embedding of the first cylinder 1 and the second cylinder 2 can be solved, and a larger stretching and contracting stress area can be provided.

[0027] The top end of the piston rod 3 is provided with a first lug 4, the bottom end of the cylinder body of the first cylinder 1 is provided with a telescopic rod assembly 5, and the other end of the telescopic rod assembly 5 is provided with a second lug 6; by adjusting the overall length of the two-section nitrogen spring through the telescopic adjusting characteristic of the telescopic rod assembly 5, the combination of the first lug 4 and the second lug 6 can better adapt to the installation environment.

[0028] The telescopic rod assembly 5 comprises a telescopic sleeve 51, and two groups of telescopic screws 53 with screw threads arranged in positive and reverse directions are screwed at both ends of the telescopic sleeve 51; by rotating the telescopic sleeve 51, the telescopic screws 53 at both ends are pushed to stretch and contract, so as to adjust the overall support length of the telescopic rod assembly 5.

[0029] Both ends of the telescopic sleeve 51 are provided with positioning wire sleeves 511, the telescopic screws 53 are screwed in the screw rod direction and are provided with positioning nuts 52 matched with the positioning wire sleeves 511, one side of the screw body of the positioning nut 52 is provided with a pushing wire thread 521 matched with the telescopic screw 53, and the other side of the screw body of the positioning nut 52 is provided with a positioning wire thread 522 matched with the positioning wire sleeve 511; after the length of the telescopic rod assembly 5 is adjusted, the pushing wire thread 521 on the positioning nut 52 is matched with the screw thread of the telescopic screw 53, the positioning nut 52 is rotated along the telescopic screw 53, and the positioning nut 52 is screwed onto the telescopic sleeve 51, so that the telescopic sleeve 51, the positioning nut 52 and the telescopic screw 53 are integrally screwed and fixed, thereby improving the adjustment stability of the telescopic rod assembly 5.

[0030] The working principle of the utility model is: when installing and using the two-section nitrogen spring, the overall length thereof can be pre-adjusted and calibrated according to the installation environment, and then when adjusting, the telescopic screw sleeve 51 of the telescopic rod assembly 5 is rotated, the telescopic screw rod 53 at both ends thereof is pushed to extend or retract, the overall supporting length of the telescopic rod assembly 5 is adjusted, so that the spacing of the first lug 4 and the second lug 6 is combined and adapted to the installation environment, and after the pre-adjustment of the supporting length of the telescopic rod assembly 5 is completed, the positioning nut 52 is rotated along the telescopic screw rod 53, the positioning nut 52 is made to approach the telescopic screw sleeve 51, the positioning thread 522 on the positioning nut 52 is adapted to the positioning thread sleeve 511, the positioning nut 52 is screwed onto the telescopic screw sleeve 51, the telescopic screw sleeve 51, the positioning nut 52 and the telescopic screw rod 53 are integrally screwed and fixed, so that the adjusted telescopic rod assembly 5 is fixed;

[0031] Further, when the two-section nitrogen spring is compressed under stress, the piston rod 3 is compressed under stress, the first piston 9 and the second piston 7 on the piston rod 3 are sequentially and synchronously elastically compressed in the first nitrogen cavity 10 in the first cylinder 1 and the second nitrogen cavity 8 in the second cylinder 2, so that the nitrogen spring maintains the double-section elastic buffering characteristic, and because the two groups of pistons on the piston rod 3 are synchronously compressed in the two groups of nitrogen cavities in an integrated linkage mode, the elastic compression of the double-section nitrogen spring is more stable, the telescopic stress area is larger, and the telescopic stroke stability is better.

[0032] The above only describes the preferred embodiments of the utility model, and it should be noted that for ordinary skilled persons in the technical field, some improvements and refinements can be made without departing from the principle of the utility model, and these improvements and refinements should also be regarded as the protection range of the utility model. The structures, devices and operation methods not specifically described and explained in the utility model are implemented according to the conventional means in the field without special description and limitation.

Claims

1. A two-stage nitrogen spring structure, characterized in that, include: First cylinder (1); The second cylinder (2) is mounted on the upper end of the cylinder body of the first cylinder (1); Piston rod (3), which extends through the second cylinder (2) into the cylinder body of the first cylinder (1); The first cylinder (1) has a first nitrogen chamber (10) inside its cylinder body, and the piston rod (3) has a first piston (9) with the first nitrogen chamber (10) inside its support rod. The cylinder body of the second cylinder (2) has a second nitrogen chamber (8) inside, and the piston rod (3) has a second piston (7) with the built-in second nitrogen chamber (8) on its support rod.

2. The two-stage nitrogen spring structure according to claim 1, characterized in that, The first nitrogen chamber (10) and the second nitrogen chamber (8) are set up independently.

3. The two-stage nitrogen spring structure according to claim 1, characterized in that, The cylinder (1) has at least one set of pressure relief chambers (11) arranged in the circumferential direction inside the cylinder body, and the pressure relief chambers (11) are connected to the first nitrogen chamber (10).

4. The two-stage nitrogen spring structure according to claim 1, characterized in that, The piston rod (3) has a first lug (4) at the top of the support rod, and the cylinder body of the first cylinder (1) has a telescopic rod assembly (5) at the bottom, and the other end of the telescopic rod assembly (5) has a second lug (6).

5. A two-stage nitrogen spring structure according to claim 4, characterized in that, The telescopic rod assembly (5) includes a telescopic sleeve (51), and two sets of telescopic screws (53) with the threads arranged in opposite directions are screwed to both ends of the telescopic sleeve (51).

6. A two-stage nitrogen spring structure according to claim 5, characterized in that, The telescopic threaded sleeve (51) is provided with positioning threaded sleeves (511) at both ends of the threaded sleeve opening. The telescopic screw (53) is screwed with a positioning nut (52) that is compatible with the positioning sleeve (511) along its screw direction.

7. A two-stage nitrogen spring structure according to claim 6, characterized in that, The positioning nut (52) has a push thread (521) on one side of the screw body that is compatible with the telescopic screw (53), and a positioning thread (522) on the other side of the screw body that is compatible with the positioning thread sleeve (511).

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