CN2191792Y

CN2191792Y - Gas stepless regulator

Info

Publication number: CN2191792Y
Application number: CN 94215698
Authority: CN
Inventors: 郭秋林
Original assignee: Individual
Current assignee: Individual
Priority date: 1994-06-24
Filing date: 1994-06-24
Publication date: 1995-03-15
Anticipated expiration: 2004-06-24

Abstract

The utility model relates to a gas stepless regulator. The upper end of a cylinder is provided with a combined sealing sleeve composed of a skeleton and a combined sealing ring which is integrally vulcanized; annular double lips and a dust-proof lip opening are arranged in the combined sealing ring; a piston rod penetrates in the combined sealing ring, and an axial through hole is arranged in the piston rod; a switch mechanism is arranged in the through hole, and is composed of a push rod, a valve needle, a limiting sleeve, a, D-shaped sealing ring, a damping sleeve, a spring, etc. The utility model has the advantages of simple and compact switch mechanism, good sealing effect, stable quality, long service life, etc.; the utility model can be widely used for the angle adjustment of a motor vehicle seat back, the lifting adjustment of an office seat, and aspects needing angle change and height adjustment, such as a sick bed, etc.

Description

Gas stepless regulator

The utility model relates to regulation technology fields such as motor vehicle seat back.

At present, the angular adjustment, office that is applicable to motor vehicle seat back is with the lift adjustment of chair and sick bed etc., need the regulating control that angle changes and height is adjusted, be that machinery has the regulating control that level is regulated or the spring reset action is more hot-tempered mostly, it all exists the dumb or deficiency such as quality is unstable or the life-span is short of operation.

It is simple, compact that the purpose of this utility model provides a kind of switching mechanism, the gas stepless regulator of good sealing effect, steady quality, long service life.

The utility model is achieved in that in the cylinder barrel upper end and is provided with the combination sealing cover, this combination sealing cover is made up of the combined seal ring of skeleton and whole sulfuration, in combined seal ring, be provided with ring-type lips and dustproof lip, piston rod is placed through in the combined seal ring, in piston rod, be provided with axially extending bore, in this through hole, be provided with switching mechanism, this switching mechanism comprises push rod, needle, stop collar, D shape seal ring, the damping cover, spring etc., the push rod head of this push rod upper end is stretched out piston rod, end in contact on its lower end and the needle, this needle middle part is provided with necking down, in the needle outer cover stop collar is arranged, be connected to D shape seal ring in the stop collar lower end successively, spacing sleeve, D shape seal ring, the damping cover, D shape seal ring and spring perch have spring at spring perch, put in damping and to be provided with pore, also be provided with pore on the corresponding piston rod.

When the gas stepless regulator is produced, in cylinder, preset the gas of certain pressure, utilize the area difference at piston two ends, make piston rod produce the potential energy of elongation outside cylinder, control by switching mechanism can make piston stop at the optional position of piston in outer stroke, thereby satisfies the angle adjusting in the certain limit, the purpose of lift adjustment.

Compared with the prior art the utility model has advantages such as switching mechanism is simple, compact, easily processing, good sealing effect, steady quality, long service life.

Below in conjunction with accompanying drawing the utility model is done to describe

Fig. 1 is the utility model structural representation

Fig. 2 is piston rod and switching mechanism structural representation

Fig. 3 is a combination sealing nested structure scheme drawing

Referring to accompanying drawing: cylinder barrel 2 lower ends are connected to extension bar 1, cylinder barrel 2 upper ends are provided with combination sealing cover 7, this combination sealing cover 7 is made up of the combined seal ring 25 of internal frame 28 and whole sulfuration, in combined seal ring, be provided with ring-type lips 26 and dustproof lip 27, piston rod 9 is placed through in the combined seal ring 25, produces good sealing effectiveness (seeing Fig. 1, Fig. 3); For making construction of switch simple, compact, in piston rod 9, be provided with axially extending bore 23, in this through hole 23, be provided with switching mechanism, this switching mechanism comprises push rod 8, needle 6, stop collar 12, D

shape seal ring

13,15,17, damping cover 16, spring 19, the push rod head 10 of these push rod 8 upper ends is stretched out piston rod 9, end in contact on push rod 8 lower ends and the needle 6, these needle 6 middle parts are provided with necking down 24, in needle 6 outer cover stop collar 12 is arranged, be socketed with D shape seal ring 13 successively in stop collar 12 lower ends, spacing sleeve 14, D shape seal ring 15, damping cover 16, D shape seal ring 17 and spring perch 18, have spring 19 at spring perch 18, spring 19 bottoms place in the spring compressor 3; With twice D

shape seal ring

13,15, needle 6 is supported, it is in floats among the two

seals circle

13,15, promptly removed other friction from, strengthened sealing effectiveness again; Spring 19 plays and makes the wearing and tearing of D shape seal ring be compensated effect, can prolong its operating cycles; On damping cover 16, be provided with pore 22, also be provided with pore 21(on the corresponding piston rod 9 and see Fig. 2); Owing to preset the gas of certain pressure in the cylinder barrel 2, the area of its piston 4 lower ends is greater than the area of piston 4 upper ends, cause the pressure of the pressure of piston lower surface greater than the piston upper surface by area difference, during use, push push rod head 10 with handgrip plate 11, push rod 8 promotes needle 6 and moves down, then the pressure gas of cylinder barrel 2 cavity of resorptions 20 is by necking down 24, damping cover pore 22, piston rod pore 21 enters in the epicoele 5 of cylinder barrel 22, piston rod 9 is after being depressed into desired location with piston 4 under the effect of external force, the handgrip plate 11 that resets resets push rod head, and close the pass, cavity of

resorption

5,20 gas passage, with plunger lock on desired location, get back to initial position as needs, need only push push rod head 10, then piston rod 9 will at the uniform velocity be elongated to summit on the piston voluntarily.

Claims

1, a kind of gas stepless regulator, extension bar, cylinder barrel, piston rod, piston are arranged, it is characterized in that, be provided with the combination sealing cover in the cylinder barrel upper end, this combination sealing cover is made up of the combined seal ring of skeleton and whole sulfuration, in combined seal ring, be provided with ring-type lips and dustproof lip, piston rod is placed through in the combined seal ring, is provided with axially extending bore in piston rod, is provided with switching mechanism in this through hole.

2, gas stepless regulator as claimed in claim 1, it is characterized in that: described switching mechanism comprises push rod, needle, stop collar, D shape seal ring, damping cover, spring, end in contact on this push rod lower end and the needle, this needle middle part is provided with necking down, in the needle outer cover stop collar is arranged, be connected to D shape seal ring, spacing sleeve, D shape seal ring, damping cover, D shape seal ring and spring perch successively in the stop collar lower end, have spring at spring perch, put in damping and to be provided with pore, also be provided with pore on the corresponding piston rod.