CN209875824U - Automatic reset air spring - Google Patents

Abstract

The utility model provides an automatic reset air spring, including cylinder body assembly and piston assembly, the cylinder body assembly includes cylinder body, floating piston and sets up the tail stifled in cylinder body one side, floating piston sets up in the cylinder body, seals through two O type circle between floating piston and the cylinder body, the piston assembly includes piston rod assembly, aluminium direction, lip-shaped sealing washer and sets up the first gasket between aluminium direction and lip-shaped sealing washer, the piston rod assembly includes piston rod body and piston; by adopting the automatic reset gas spring, a large amount of labor is saved, and a plurality of parts are saved on the seat structure, so that the structure is optimized, and the manufacturing cost is reduced.

Description

Automatic reset air spring

Technical Field

The utility model relates to an air spring technical field, concretely relates to automatic reset air spring.

Background

The function of the existing gas spring is reset, and the gas spring is divided into two categories according to the working environment and the different requirements: 1. the controllable gas spring, namely the piston rod can be controlled to stay at any point or position, and the controllable gas spring is widely applied to the adjustment of various seat backs of automobiles, high-speed rails, airplanes and the like, and the application on lifting frames and conveyors; 2. uncontrollable gas springs are used in, for example, car rear luggage compartment supports, street lamps, printers, fitness equipment, and some medical equipment. The working principle of the existing gas spring is that according to the Pascal law, a piston divides a sealed cylinder body into two working chambers, and a piston rod is in a normal unfolding state by filling inert gas with certain pressure.

When the existing controllable gas spring works, an ejector pin is opened by means of input external force, a piston rod extends out, and the existing controllable gas spring is in an unfolded state; the piston rod is compressed by pushing backwards by manual force, even though the so-called automatic resetting gas spring in the market does not realize 'automation', the movement of the piston rod is still realized by manually opening a top rod of the gas spring.

Disclosure of Invention

In order to solve the problems existing in the prior art, the utility model provides an automatic reset air spring.

The utility model provides a technical scheme of above-mentioned problem does: an automatic reset gas spring comprises a cylinder body assembly and a piston assembly, wherein the cylinder body assembly comprises a cylinder body, a floating piston and a tail plug arranged on one side of the cylinder body, the floating piston is arranged in the cylinder body, and the floating piston and the cylinder body are sealed through two O-shaped rings;

the piston assembly comprises a piston rod assembly, an aluminum guide, a lip-shaped sealing ring and a first gasket arranged between the aluminum guide and the lip-shaped sealing ring, the aluminum guide is arranged on the other side of the cylinder body, the piston rod assembly comprises a piston rod body and a piston, a valve core and an ejector rod are arranged in the piston rod body, the valve core is movably arranged on the inner side of the piston rod body, the ejector rod is movably arranged on the outer side of the inner part of the piston rod, a bushing is arranged between the valve core and the inner wall of the piston rod, the two sides of the bushing are sealed by combining an O-shaped sealing ring and a sealing gasket, oil outlet holes are formed in the side walls of the bushing and the piston rod body, the piston is fixedly arranged on the inner side of the outer wall of the piston rod body, an oil drainage hole is, the piston sets up in the cylinder body, seals through O type sealing washer between piston and the cylinder body, the piston rod body right side passes lip seal, first gasket, aluminium direction and cylinder body setting in proper order outside the cylinder body, seal through O type sealing washer between piston rod body outer wall and the aluminium direction.

The utility model discloses beneficial effect has:

(1) the structure is simple, the part material is saved, and the product cost is reduced;

(2) because the piston is provided with a plurality of oil drainage holes, the reset time and speed of the seat back can be adjusted according to the use requirement.

(3) The piston rod body is riveted with the piston, the rubber gasket is tightly pressed through the gasket instead of being locked by a nut, and therefore the piston rod cannot loosen after being riveted, and the reliability of assembly of parts is ensured.

Drawings

Fig. 1 is a schematic structural view of the present invention;

FIG. 2 is a schematic structural view of a piston rod assembly;

in the figure: 1-cylinder body, 2-floating piston, 3-tail plug, 4-aluminum guide, 5-lip seal ring, 6-first gasket, 7-piston rod body, 8-piston, 9-valve core, 10-ejector rod, 11-bush, 12-oil drain hole, 13-steel ball, 14-rubber gasket, 15-air cavity, 16-left oil cavity and 17-right oil cavity.

Detailed Description

The present invention will be further described with reference to the accompanying drawings and the detailed description.

As shown in the figure, the automatic resetting gas spring comprises a cylinder body 1 assembly and a piston 8 assembly, wherein the cylinder body 1 assembly comprises a cylinder body 1, a floating piston 2 and a tail plug 3 arranged on one side of the cylinder body 1, the floating piston 2 is arranged in the cylinder body 1, and the floating piston 2 and the cylinder body 1 are sealed through two O-shaped rings;

the piston 8 assembly comprises a piston 8 rod assembly, an aluminum guide 4, a lip-shaped sealing ring 5 and a first gasket 6 arranged between the aluminum guide 4 and the lip-shaped sealing ring 5, the aluminum guide 4 is arranged on the other side of the cylinder body 1, the piston 8 rod assembly comprises a piston rod body 7 and a piston 8, a valve core 9 and an ejector rod 10 are arranged in the piston rod body 7, the valve core 9 is movably arranged on the inner side of the piston rod body 7, the ejector rod 10 is movably arranged on the outer side of the piston 8 rod, a lining 11 is arranged between the valve core 9 and the inner wall of the piston 8 rod, two sides of the lining 11 are sealed by combining an O-shaped sealing ring and a sealing gasket, oil outlets are arranged on the side walls of the lining 11 and the piston rod body 7, the piston 8 is fixedly arranged on the inner side of the outer wall of the piston rod body 7, be equipped with draining hole 12 on piston 8, be equipped with steel ball 13 in the draining hole 12, be equipped with rubber gasket 14 on the piston 8 on the pressure relief hole right side, be equipped with the aperture on rubber gasket 14, piston 8 sets up in cylinder body 1, and is sealed through O type sealing washer between piston 8 and the cylinder body 1, 7 right sides of piston rod body pass lip seal 5, first gasket 6, aluminium direction 4 and cylinder body 1 setting in proper order outside cylinder body 1, it is sealed through O type sealing washer between 7 outer walls of piston rod body and the aluminium direction 4.

The piston 8 is arranged on the right side of the floating piston 2, the floating piston 2 divides the interior of the cylinder body 1 into an air cavity 15 and an oil cavity, an air cavity 15 is arranged between the tail plug 3 and the floating piston 2, gas with certain pressure is filled in the air cavity 15, the oil cavity is divided into a left oil cavity 16 and a right oil cavity 17 by the piston 8, the ejector rod 10 is pressed in, the valve core 9 is ejected, the air cavity 15 and the left oil cavity 16 are compressed, hydraulic oil in the left oil cavity 16 enters the right oil cavity 17, the ejector rod 10 is loosened, high-pressure gas in the air cavity 15 pushes the floating piston 2 to move rightwards, so that the hydraulic oil in the left oil cavity 16 enters the piston rod body 7 through a gap between the valve core 9 and the piston rod body 7 and enters the right oil cavity 17 through the bush 11 and an oil hole on the side wall of the piston rod body 7, the hydraulic oil in the right oil cavity 17 passes through an oil drainage hole 12 of the piston 8 and enters, and the hydraulic oil in the right cavity can only slowly leak due to the blockage of the rubber gasket 14 on the left end surface of the piston 8, so that the piston rod body 7 slowly extends to the right side to achieve the automatic return of the piston 8 rod. The piston rod body 7 is connected with the seat back, and when the piston rod body 7 is unfolded towards the right side, the seat back moves towards the left side and returns to the initial state.

To sum up, adopt this kind of automatic re-setting's air spring, practiced thrift a large amount of manual works, saved many spare parts in the seat structure moreover, structural optimization has reduced manufacturing cost again promptly, for example on the high-speed railway, a section carriage has 90 seats, the passenger gets off the car after, the staff will be every section carriage, every seat adjust that resets, just can resume the seat initial condition, has consumed a large amount of time and energy, and adopt the utility model discloses technical air spring gets off the car after, need not the staff and carry out the manual regulation that resets, can all automatic re-setting to initial condition in the regulation time, the time of resetting simultaneously can be formulated by the customer.

The above description is only a preferred embodiment of the present invention, and is not intended to limit the present invention in other forms, and any person skilled in the art may use the above-mentioned technical contents to change or modify the equivalent embodiment into equivalent changes and apply to other fields, but any simple modification, equivalent change and modification made to the above embodiments according to the technical matters of the present invention will still fall within the protection scope of the technical solution of the present invention.

Claims (5)

1. An automatic reset gas spring is characterized by comprising a cylinder body assembly and a piston assembly, wherein the cylinder body assembly comprises a cylinder body, a floating piston and a tail plug arranged on one side of the cylinder body;

the piston assembly comprises a piston rod assembly, an aluminum guide, a lip-shaped sealing ring and a first gasket arranged between the aluminum guide and the lip-shaped sealing ring, the aluminum guide is arranged on the other side of the cylinder body, the piston rod assembly comprises a piston rod body and a piston, a valve core and an ejector rod are arranged in the piston rod body, the valve core is movably arranged on the inner side of the piston rod body, the ejector rod is movably arranged on the outer side of the inner part of the piston rod, a bushing is arranged between the valve core and the inner wall of the piston rod, the two sides of the bushing are both sealed by combining an O-shaped sealing ring and a sealing gasket, oil outlet holes are formed in the side wall of the bushing and the piston rod body, the piston is fixedly arranged on the inner side of the outer wall of the piston rod body, an oil drainage hole is, the right side of the piston rod body sequentially penetrates through the lip-shaped sealing ring, the first gasket, the aluminum guide and the cylinder body to be arranged outside the cylinder body, and the outer wall of the piston rod body and the aluminum guide are sealed through the O-shaped sealing ring.

2. An automatic reset gas spring as set forth in claim 1 wherein the piston is connected to the piston rod body by riveting.

3. The automatic resetting gas spring as claimed in claim 1, wherein the piston is disposed at the right side of the floating piston, the floating piston divides the interior of the cylinder body into a gas chamber and an oil chamber, the gas chamber is disposed between the tail plug and the floating piston, the gas chamber is filled with gas under a certain pressure, and the oil chamber is filled with hydraulic oil.

4. An automatic reset gas spring as set forth in claim 3 wherein said oil chamber is divided by the piston into a left side oil chamber and a right side oil chamber.

5. The automatic reset gas spring as claimed in claim 1, wherein a rubber gasket is provided on the piston on the right side of the pressure relief hole, and a small hole is provided on the rubber gasket.