CN2499634Y

CN2499634Y - Gas spring cylinder

Info

Publication number: CN2499634Y
Application number: CN 01264425
Authority: CN
Inventors: 萧文龙
Original assignee: Forwell Precision Machinery Co ltd
Current assignee: Forwell Precision Machinery Co ltd
Priority date: 2001-09-29
Filing date: 2001-09-29
Publication date: 2002-07-10
Anticipated expiration: 2011-09-29

Abstract

The utility model relates to a gas spring cylinder, and provides a gas pressure spring cylinder which has the effect of a gas spring and can have the efficacy of adjustable elasticity and buffering power that a spring does not have, so as to achieve better practical efficacy. The utility model mainly comprises a cylinder body, a piston rod with a piston and a gas pressure control valve, wherein the gas pressure control valve is set as a tube body in which a guide rod with an unidirectional blocking head and a spring are arranged, and provided with a main air hole and an inner air hole. Through the structure, nitrogen can be input and pressed in the cylinder body to make the piston rod stretch out; the output gas pressure amount can be adjusted to fit the compressibility of gas, so as to make the piston rod have elasticity, and the elasticity degree can be set according to the input gas pressure amount. Therefore, when the utility model is used to support an object moving up and down, the utility model can have buffering effect. The buffering speed can be set according to the gas pressure amount, i.e. the higher buffering speed is needed, the larger gas pressure amount is input, while the lower buffering speed is needed, the smaller gas pressure amount is input, so as to achieve excellent practical efficacy.

Description

Gas spring cylinder

Technical Field

The utility model relates to a spring cylinder, especially gas spring jar.

Background

The conventional pneumatic cylinder and hydraulic cylinder have no elastic, elastic and buffering effects, because the hydraulic (or pneumatic) source must be continuously input to keep the piston rod extended, otherwise, the piston rod retracts as soon as the pressure source disappears. In addition, although the conventional spring has elastic force and buffering effect, the elastic force is fixed, even the spring is used for a longer time, the elastic force is smaller due to elastic fatigue, and the elastic force is not adjustable in different magnitudes, and even when the elastic fatigue is serious, the spring needs to be discarded and replaced with a new spring.

Disclosure of Invention

In order to overcome the defects of the prior art, the present invention provides a gas spring cylinder, which can make the cylinder body and the piston rod have elastic force and buffering effect, and can adjust the elastic force and the buffering force with different sizes according to the requirement.

In order to achieve the above object, the present invention provides a gas spring cylinder, comprising: the cylinder body is tubular, a penetrating telescopic chamber and an air pressure chamber are arranged in the cylinder body, a front sealing sleeve with a through hole is arranged at the front end of the cylinder body, and the air pressure control valve is assembled at the rear end of the cylinder body; the bottom end of the piston rod is provided with a piston and is arranged in a telescopic chamber of the cylinder body, the front end of the piston rod is exposed out of the front envelope, and the front envelope and the piston rod are sealed by a sealing element; the air pressure control valve is arranged into a hollow cylinder body, an accommodating groove is arranged in the cylinder body, one end of the accommodating groove is provided with a main vent hole for inputting air, the other end of the accommodating groove is provided with an inner vent hole and a through hole, a guide rod with a conical one-way blocking head is assembled in the accommodating groove, the guide rod can movably penetrate through the through hole at the end of the inner vent hole, and a spring capable of keeping the one-way blocking head to block the main vent hole is sleeved on the guide rod; through the structure, the spring cylinder with the spring elasticity and the buffering force effect by the air pressure is obtained, and the spring cylinder has the elasticity and the buffering force which can be adjusted according to the requirements, thereby achieving the practical effects of being wider and bearing strong heavy objects.

The utility model has the advantages that:

1. because the utility model discloses establish into the cylinder body and have piston rod, pneumatic chamber, flexible room, and the group is equipped with the pneumatic control valve, and can input gas in the cylinder body to keep this atmospheric pressure, consequently, the compressible characteristic of usable gas makes the piston rod have elastic force, and provides the function that has spring buffering, can bear powerful heavy object buffering effect.

2. The air pressure control valve can adjust the air pressure in the air pressure chamber and the expansion chamber, and the elasticity and the buffer force with different sizes can be set according to the requirement, so that the practicability is wider.

Drawings

The present invention will be described in detail with reference to the accompanying drawings and embodiments:

FIG. 1 is a cross-sectional (uninflated) view of the inventive structure;

fig. 2 is a schematic view of the usage state (inflation) of the present invention.

Detailed Description

Referring to fig. 1 and 2, the present invention includes: a cylinder 10, a piston rod 13 and an air pressure control valve 20; wherein,

a cylinder body 10, which is like a tube and is internally provided with a through expansion chamber 11 and an air pressure chamber 12, the front end of the cylinder body is sealed by a front envelope 15 with a through hole, and the rear end of the cylinder body is sealed by an assembly air pressure control valve 20;

a piston rod 13, the bottom end of which is provided with an integrated piston 14 and is assembled in the expansion chamber 11 of the cylinder 10, the front end of which is exposed out of the front envelope 15, the space between the front envelope 15 and the piston rod 13 is sealed by a sealing element 16 to prevent air leakage, and the piston rod 13 can extend out or release air by the input air of the expansion chamber 11 and the air pressure chamber 12 in the cylinder 10 and is contracted into the cylinder 10;

an air pressure control valve 20, set up into a hollow cylinder 21, there are containing grooves 22 in it, its one end has main air vent 23 for inputting the gas, another end has inner air vent 24 and through hole, and, set up a guide bar 25 with conical unidirectional stopper 26 in its containing groove 22, the guide bar 25 is worn in the through hole of the end of inner air vent 24, present and can move forward, backward, the guide bar 25 is fitted with the spring 27, and can keep the unidirectional stopper 26, guide bar 25 to block the main air vent 23, and can let out the air pressure in the cylinder 10, regulate the air pressure of different sizes in the cylinder 10;

through the structure, the function and the efficacy of the utility model are explained in detail as follows:

referring to fig. 2, the nitrogen pressure W is filled through the main vent hole 23 of the air pressure control valve 20, the air pressure W can open the one-way choke head 26 and the guide rod 25 to move back, and the air pressure W is input into the air pressure chamber 12 and the expansion chamber 11 through the accommodating groove 22 and the inner vent hole 24 of the cylinder 21 to extend the piston rod 13, when the required air pressure is reached, no air is input, the spring 27 of the air pressure control valve 20 can push the guide rod 25 and the one-way choke head 26 to advance, so that the one-way choke head 26 blocks the main vent hole 23, and the air pressure in the cylinder 10 can be maintained without air leakage. The nitrogen gas may also be air, oxygen, carbon dioxide gas, or other gases.

After the required air pressure is set, the bottom of the cylinder 10 can be fixed at the position where buffering and elasticity are required, and when the weight (gravity) pressed on the upper side of the piston rod 13 is supported, because the gas (nitrogen) in the telescopic chamber 11 and the air pressure chamber 12 in the cylinder 10 can be compressed (the gas can be compressed to be thick and thin), the bottom end of the piston 14 of the piston rod 13 can generate elastic elasticity effect, so that the piston has the function of generating elasticity and buffering like a spring, and the weight on the upper side can be elastically buffered.

It is worth mentioning that the elasticity of the present invention is adjustable, when the elasticity is to be increased, the above-mentioned air pressure is charged again to generate a larger air pressure and elasticity, when the elasticity is to be decreased or the pressure is to be released, a thin rod object can be manually used to be inserted into the main air vent 23 to push the guide rod 25 and the one-way blocking head 26 to move backward, the main air vent 23 is not blocked, and the excessive air pressure can be discharged to achieve the air pressure elastic force of the required magnitude, or the air pressure can be completely released, so that the piston rod 13 can be retracted into the cylinder 10.

Therefore, the utility model discloses adaptable different situation needs and adjustment provide correct elasticity, cushion effect, can not have the not enough or too big problem of strength, and the practicality is extensive, and splendid.

To sum up, the structure of the utility model is really an extremely unique design, and the efficacy that reaches also has splendid practical efficiency, honest the requirement that accords with the utility model patent, specially proposes the application.

Claims

1. A gas spring cylinder, comprising: a cylinder body, a piston rod and an air pressure control valve, its characterized in that:

the cylinder body is tubular, a penetrating telescopic chamber and an air pressure chamber are arranged in the cylinder body, a front sealing sleeve with a through hole is arranged at the front end, and an air pressure control valve is assembled at the rear end;

the bottom end of the piston rod is provided with a piston and is arranged in a telescopic chamber of the cylinder body, the front end of the piston rod is exposed out of the front envelope, and the front envelope and the piston rod are sealed by a sealing element;

the air pressure control valve is arranged into a hollow cylinder body, an accommodating groove is arranged in the cylinder body, one end of the accommodating groove is provided with a main vent hole for inputting air, the other end of the accommodating groove is provided with an inner vent hole and a through hole, a guide rod with a conical one-way blocking head is assembled in the accommodating groove, the guide rod can movably penetrate through the through hole at the end of the inner vent hole, and a spring capable of keeping the one-way blocking head to block the main vent hole is sleeved on the guide rod.