阅读说明：本技术 一种拉力气弹簧 (Tension gas spring ) 是由 尹峻岗 杨忠宁 吕华 于 2021-01-07 设计创作，主要内容包括：本发明公开了一种拉力气弹簧,包括有活塞缸、活塞、拉杆和连接杆,所述活塞设于活塞缸内,并将活塞缸分隔为真空腔和高压气体腔,在活塞缸内还设有导向套,导向套位于高压气体腔一侧,所述拉杆一端与面向高压汽体腔一侧的活塞固定连接,另一端通过高压汽体腔,并贯通所述导向套延伸至活塞缸外侧,所述连接杆固定于面向真空腔一侧的活塞缸上,真空腔为真空状态,而在高压气体腔内注入有高压惰性气体。采用本发明所述的拉力气弹簧,具有结构简单,操作方便,不仅能够满足大行程、大拉力的应用要求,还能有效避免活塞缸内的气体在长时间使用过程中容易出现微量漏气的技术问题,从而提高气弹簧的使用寿命,降低成本,适合推广应用。(The invention discloses a tension gas spring, which comprises a piston cylinder, a piston, a pull rod and a connecting rod, wherein the piston is arranged in the piston cylinder and divides the piston cylinder into a vacuum cavity and a high-pressure gas cavity, a guide sleeve is also arranged in the piston cylinder and is positioned at one side of the high-pressure gas cavity, one end of the pull rod is fixedly connected with the piston at one side facing the high-pressure gas cavity, the other end of the pull rod passes through the high-pressure gas cavity and extends to the outer side of the piston cylinder by penetrating through the guide sleeve, the connecting rod is fixed on the piston cylinder at one side facing the vacuum cavity, the vacuum cavity is in a vacuum state, and high-. The tension gas spring has the advantages of simple structure and convenience in operation, can meet the application requirements of large stroke and large tension, and can effectively avoid the technical problem that gas in a piston cylinder is easy to leak in trace amount in the long-time use process, so that the service life of the gas spring is prolonged, the cost is reduced, and the tension gas spring is suitable for popularization and application.)

1. A tension gas spring, characterized in that: comprises a piston cylinder (1), a piston (2), a pull rod (3) and a connecting rod (4), wherein the piston (2) is arranged in the piston cylinder (1), and divides the piston cylinder (1) into a vacuum cavity (5) and a high-pressure gas cavity (6), a guide sleeve (7) is also arranged in the piston cylinder (1), the guide sleeve (7) is positioned at one side of the high-pressure gas cavity (6), one end of the pull rod (3) is fixedly connected with the piston (2) facing one side of the high-pressure steam cavity (6), the other end of the pull rod passes through the high-pressure steam cavity (6), and extends to the outer side of the piston cylinder (1) by penetrating through the guide sleeve (7), the connecting rod (4) is fixed on the piston cylinder (1) facing one side of the vacuum cavity (5), the vacuum chamber (5) is in a vacuum state, and high-pressure inert gas is injected into the high-pressure gas chamber (6).

2. A tension gas spring as set forth in claim 1, wherein: the piston cylinder (1) is of a double-layer structure formed by an outer cylinder (11) and an inner cylinder (12), a front end cover (13) and a rear end cover (14) which are hermetically connected with the outer cylinder (11) and the inner cylinder (12) are respectively arranged at the front end and the rear end of the piston cylinder (1), the front end cover (13) is positioned at one side of a high-pressure gas cavity (6) and is hermetically connected with a guide sleeve (7) arranged in the piston cylinder (1), the rear end cover (14) is positioned at one side of a vacuum cavity (5), the rear end of the connecting rod (4) is fixed with the rear end cover (14), and a sealing element (8) is arranged between the rear end cover (14) and the vacuum cavity (5); an air supply chamber (15) is formed between the outer cylinder (11) and the inner cylinder (12), and an air supply channel (9) is further arranged between the air supply chamber (15) and the high-pressure gas cavity (7).

3. A tension gas spring as set forth in claim 2, wherein: tonifying qi passageway (9) comprise first water conservancy diversion hole (91), second water conservancy diversion hole (92) and oil storage mechanism (93) be close to front end housing (13) one side on inner tube (12) be equipped with communicating first water conservancy diversion hole (91) of tonifying qi cavity (15) be equipped with on uide bushing (7) with communicating second water conservancy diversion hole (92) in high-pressure gas chamber (6) still be equipped with oil storage mechanism (93) between uide bushing (7) and front end housing (13), through oil storage mechanism (93) sealing connection between uide bushing (7) and front end housing (13), first water conservancy diversion hole (91) and second water conservancy diversion hole (92) constitute through oil storage mechanism (93) tonifying qi passageway (9).

4. A tension gas spring as claimed in claim 3, wherein: the first flow guide holes (91) and the second flow guide holes (92) are respectively provided with a plurality of flow guide holes, and the diameters of the flow guide holes are the same, wherein the first flow guide holes (91) are annularly distributed on the inner cylinder (12), and the second flow guide holes (92) are annularly distributed on the guide sleeve (7); the oil storage mechanism (93) is an elastic sealing element, the elastic sealing element is made into a cylindrical structure by adopting a sponge material, the outer diameter of the elastic sealing element is slightly smaller than the inner diameter of the inner cylinder (12), and the length of the elastic sealing element is slightly larger than the aperture of the first flow guide hole (91) and the second flow guide hole (92).

5. A tension gas spring as set forth in claim 1, wherein: the other ends of the pull rod (3) and the connecting rod (4) are respectively provided with a connector (10) which forms an integral structure with the pull rod, and a universal joint which can be hinged is arranged in the connector (10).

6. A tension gas spring as set forth in claim 1, wherein: the high-pressure inert gas injected into the high-pressure gas cavity (7) is nitrogen.

Technical Field

The invention relates to the technical field of gas springs, in particular to a tension gas spring.

Background

The gas spring is an industrial accessory which can play a role in supporting, buffering, braking, height adjustment, angle adjustment and the like. The principle is that inert gas or oil-gas mixture is filled in a closed piston cylinder, so that the air pressure in the cylinder is several times or dozens of times higher than the atmospheric pressure, and the movement of a piston rod is realized by utilizing the area difference between the piston and the piston rod to generate pressure difference. Gas springs are also called support rods, gas struts, angle adjusters, gas pressure rods, dampers, etc. depending on their characteristics and field of application. The air springs are classified according to the structure and the function of the air springs, and comprise a free type air spring, a self-locking type air spring, a traction type air spring, a free air stopping spring, a swivel chair air spring, a pneumatic rod, a damper and the like.

The gas spring has the elasticity change characteristic of a quadratic curve which is relatively close to an ideal spring, so that the gas spring has the advantages of relatively slow speed, small dynamic force change (generally within 1: 1.2) and easiness in control. The method is widely applied to a plurality of industries such as the automobile industry, printing machinery, medical appliances, office equipment, furniture manufacturing, machining, industrial machinery, aerospace, locomotive manufacturing and the like. In the specific application process, aiming at different equipment and equipment, a gas spring with large stroke and large pulling force is sometimes needed to be used, such as equipment and equipment such as an automobile anti-collision beam in the automobile industry, a marble cutter in machining and the like. The existing air springs are compressed air springs, only a small amount of stretching air springs are provided, the concentricity and the straightness of two cavities are difficult to guarantee in the actual production and processing process, single-side friction between a piston and an inner pipe, between a piston rod and an oil seal and between the piston and the oil seal and between the piston rod and the oil seal and between the piston and the oil seal can be. Particularly, the longer the stroke is, the smoother the stretching is, the larger the difference between the initial tension and the final tension is, the difficulty in practical operation is caused, the possibility of mass production is low, or the defective rate is high even in mass production, the production cost is high, and the gas leakage condition is easy to occur in the long-time use process, so that the service life of the gas spring is influenced. Therefore, in view of the existing situation, it is necessary to develop a stretching type gas spring with flexible structure and excellent performance.

Disclosure of Invention

The technical problem to be solved by the invention is to provide a tension gas spring which has a flexible structure and is convenient to operate, can meet the application requirements of large stroke and large tension, and can effectively avoid the technical problem that gas in a piston cylinder is easy to leak in a trace amount in the long-time use process, thereby prolonging the service life of the gas spring and reducing the cost.

In order to solve the technical problems, the technical scheme adopted by the invention is as follows: a tension gas spring comprises a piston cylinder, a piston, a pull rod and a connecting rod, wherein the piston is arranged in the piston cylinder and divides the piston cylinder into a vacuum cavity and a high-pressure gas cavity, a guide sleeve is further arranged in the piston cylinder and is positioned on one side of the high-pressure gas cavity, one end of the pull rod is fixedly connected with the piston facing one side of the high-pressure gas cavity, the other end of the pull rod penetrates through the high-pressure gas cavity and extends to the outer side of the piston cylinder by penetrating through the guide sleeve, the connecting rod is fixed on the piston cylinder facing one side of the vacuum cavity, the vacuum cavity is in a vacuum state, and high-pressure inert gas is injected into the high.

Furthermore, the tension gas spring is characterized in that the piston cylinder is of a double-layer structure consisting of an outer cylinder and an inner cylinder, a front end cover and a rear end cover which are hermetically connected with the outer cylinder and the inner cylinder are respectively arranged at the front end and the rear end of the piston cylinder, the front end cover is positioned at one side of the high-pressure gas cavity and is hermetically connected with a guide sleeve arranged in the piston cylinder, the rear end cover is positioned at one side of the vacuum cavity, the rear end of the connecting rod is fixed with the rear end cover, and a sealing element is arranged between the rear end cover and the vacuum cavity; an air supply cavity is formed between the outer cylinder and the inner cylinder, and an air supply channel is further arranged between the air supply cavity and the high-pressure air cavity.

Furthermore, the gas supplementing channel consists of a first flow guide hole, a second flow guide hole and an oil storage mechanism, wherein the first flow guide hole communicated with the gas supplementing cavity is formed in one side, close to the front end cover, of the inner cylinder, the second flow guide hole communicated with the high-pressure gas cavity is formed in the guide sleeve, the oil storage mechanism is further arranged between the guide sleeve and the front end cover, the guide sleeve and the front end cover are connected in a sealing mode through the oil storage mechanism, and the gas supplementing channel is formed by the first flow guide hole and the second flow guide hole through the oil storage mechanism.

Furthermore, the tension gas spring is provided with a plurality of first flow guide holes and a plurality of second flow guide holes, wherein the first flow guide holes are annularly distributed on the inner cylinder, and the second flow guide holes are annularly distributed on the guide sleeve; the oil storage mechanism is an elastic sealing element which is made of sponge materials and is of a cylindrical structure, wherein the outer diameter of the elastic sealing element is slightly smaller than the inner diameter of the inner cylinder, and the length of the elastic sealing element is slightly larger than the aperture of the first flow guide hole and the second flow guide hole.

Furthermore, the other ends of the pull rod and the connecting rod are respectively provided with a connector which is integrated with the pull rod and the connecting rod, and a universal joint capable of being hinged is arranged in the connector.

Further, according to the tension gas spring, the high-pressure inert gas injected into the high-pressure gas cavity is nitrogen.

Compared with the prior art, the tension gas spring has the beneficial effects that: because the piston cylinder adopts outer tube and inner tube constitution bilayer structure, form the tonifying qi cavity between outer tube and the inner tube tonifying qi cavity tonifying qi passageway still be equipped with between tonifying qi cavity and the high-pressure gas chamber, in long-time use, when the gas in the high-pressure gas intracavity appears revealing in a small number, through tonifying qi cavity tonifying qi passageway replenishing gas in time, with this reinforcing pull rod's pulling force, guarantee the normal use of air spring. The gas spring has the advantages of being simple in structure and convenient to operate, not only being capable of meeting the application requirements of large stroke and large tension, but also being capable of effectively avoiding the technical problem that gas in the piston cylinder is easy to leak in a micro-scale manner in the long-time use process, thereby prolonging the service life of the gas spring, reducing the cost and being suitable for popularization and application.

Drawings

The present invention will be described in further detail with reference to the accompanying drawings.

FIG. 1 is a schematic structural diagram of the present invention.

Shown in the figure: 1-piston cylinder, 11-outer cylinder, 12-inner cylinder, 13-front end cover, 14-rear end cover, 15-air supplement chamber, 2-piston, 3-pull rod, 4-connecting rod, 5-vacuum chamber, 6-high pressure gas chamber, 7-guide sleeve, 8-sealing element, 9-air supplement channel, 91-first guide hole, 92-second guide hole, 93-oil storage mechanism and 10-connector.

Detailed Description

To further illustrate the concepts of the present invention, embodiments of the present invention will be further described with reference to the accompanying drawings in which:

as shown in fig. 1, the tension gas spring according to the present invention comprises a piston cylinder 1, a piston 2, a pull rod 3 and a connecting rod 4, wherein the piston 2 is disposed in the piston cylinder 1 and divides the piston cylinder 1 into a vacuum chamber 5 and a high pressure gas chamber 6, a guide sleeve 7 is further disposed in the piston cylinder 1, the guide sleeve 7 is located on one side of the high pressure gas chamber 6, one end of the pull rod 3 is fixedly connected with the piston 2 facing one side of the high pressure gas chamber 6, the other end of the pull rod passes through the high pressure gas chamber 6 and extends to the outside of the piston cylinder 1 through the guide sleeve 7, the connecting rod 4 is fixed on the piston cylinder 1 facing one side of the vacuum chamber 5, the vacuum chamber 5 is in a vacuum state, and high pressure inert gas is injected into the high pressure gas chamber.

Further, the piston cylinder 1 of the tension gas spring is of a double-layer structure consisting of an outer cylinder 11 and an inner cylinder 12, a front end cover 13 and a rear end cover 14 which are hermetically connected with the outer cylinder 11 and the inner cylinder 12 are respectively arranged at the front end and the rear end of the piston cylinder 1, the front end cover 13 is positioned at one side of a high-pressure gas cavity 6 and is hermetically connected with a guide sleeve 7 arranged in the piston cylinder 1, the rear end cover 14 is positioned at one side of a vacuum cavity 5, the rear end of the connecting rod 4 is fixed with the rear end cover 14, and a sealing element 8 is arranged between the rear end cover 14 and the vacuum cavity 5; an air supply cavity 15 is formed between the outer cylinder 11 and the inner cylinder 12, an air supply channel 9 is further arranged between the air supply cavity 15 and the high-pressure gas cavity 6, and the high-pressure inert gas is nitrogen.

Further, the gas supplementing channel 9 of the tension gas spring of the present invention is composed of a first flow guide hole 91, a second flow guide hole 92 and an oil storage mechanism 93, wherein one side of the inner cylinder 12 close to the front end cover 13 is provided with the first flow guide hole 91 communicated with the gas supplementing cavity 15, the guide sleeve 7 is provided with the second flow guide hole 92 communicated with the high pressure gas cavity 6, the oil storage mechanism 93 is further arranged between the guide sleeve 7 and the front end cover 13, the guide sleeve 7 and the front end cover 13 are hermetically connected through the oil storage mechanism 93, and the first flow guide hole 91 and the second flow guide hole 92 form the gas supplementing channel 9 through the oil storage mechanism 93.

Furthermore, the tension gas spring of the present invention has a plurality of first diversion holes 91 and a plurality of second diversion holes 92, and the first diversion holes 91 and the second diversion holes 92 have the same aperture, wherein the first diversion holes 91 are annularly distributed on the inner cylinder 12, and the second diversion holes 92 are annularly distributed on the guide sleeve 7; the oil storage mechanism 93 is an elastic sealing element, the elastic sealing element is made of a sponge material and is of a cylindrical structure, wherein the outer diameter of the elastic sealing element is slightly smaller than the inner diameter of the inner cylinder 12, and the length of the elastic sealing element is slightly larger than the aperture of the first flow guide hole 91 and the aperture of the second flow guide hole 92.

Further, according to the tension gas spring, the other ends of the pull rod 3 and the connecting rod 4 are respectively provided with a connecting head 10 which is integrated with the pull rod, and a universal joint capable of being hinged is arranged in the connecting head 10. The universal joint can be conveniently connected with an external structural member, and the structure of the prior art can be adopted.

In a specific application process, the tension gas spring provided by the invention is hinged with an external mechanism to be connected through the pull rod 3 and the connector 10 on the connecting rod 4 by using the universal joint, so that the installation process can be completed. Because the air pressures on the two side surfaces of the piston 2 in the piston cylinder 1 are different, the piston 2 drives the pull rod 3 to move to one side of the vacuum cavity 5, thereby realizing the pulling force; the piston cylinder 1 adopts a double-layer structure formed by the outer cylinder 11 and the inner cylinder 12, an air supplementing cavity 15 is formed between the outer cylinder 11 and the inner cylinder 12, an air supplementing channel 9 is further arranged between the air supplementing cavity 15 and the high-pressure gas cavity 6, and when a small amount of gas in the high-pressure gas cavity 6 leaks in a long-time use process, the gas can be supplemented in time through the air supplementing cavity 15 by utilizing the air supplementing channel 9, so that the tension of the pull rod 3 is enhanced, and the normal use of the gas spring is ensured.

In conclusion, the tension gas spring provided by the invention has the advantages that the structure is simple, the operation is convenient, the application requirements of large stroke and large tension can be met, and the technical problem that gas in a piston cylinder is easy to leak in a micro-scale manner in the long-time use process can be effectively solved, so that the service life of the gas spring is prolonged, the cost is reduced, and the tension gas spring is suitable for popularization and application.

The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art, and any modifications, equivalents, improvements, etc. made by using the present invention should be included in the protection scope of the present invention.