CN209725064U - A kind of automatic inflating device pressure balancing piston spring - Google Patents

Abstract

The utility model discloses a kind of automatic inflating device pressure balancing piston springs, it include: cylinder barrel and piston rod, one end of piston rod is protruded into cylinder barrel, the end that piston rod protrudes into cylinder barrel is fixed with piston head, an equilibrated valve is additionally provided in cylinder barrel rodless cavity, equilibrated valve includes the fixed block being fixed in inner wall of cylinder, through-hole is offered in the middle part of fixed block, through-hole towards piston head one end be taper, a casing is socketed in through-hole, centre bore is offered in the middle part of casing, the side of casing towards piston head also forms snap ring.The utility model realizes automatic inflating device, maintains the pressure of low pressure chamber, allows to maintain lifting force for a long time.

Description

A kind of automatic inflating device pressure balancing piston spring

Technical field

The utility model relates to gas spring technology field, specially a kind of automatic inflating device pressure balancing piston spring.

Background technique

The compression piston spring of ordinary construction more or less has some gas leakage with the increase of access times or time Phenomenon can constantly decay so as to cause lifting force, until disabler.

Utility model content

The purpose of this utility model is to provide a kind of automatic inflating device pressure balancing piston springs, to solve above-mentioned background skill The problem of being proposed in art.

To achieve the above object, the utility model provides the following technical solutions: a kind of automatic inflating device pressure balancing piston bullet Spring, comprising: one end of cylinder barrel and piston rod, piston rod is protruded into cylinder barrel, and the end that piston rod protrudes into cylinder barrel is fixed with piston head, An equilibrated valve is additionally provided in cylinder barrel rodless cavity, equilibrated valve includes the fixation being fixed in inner wall of cylinder Block offers through-hole in the middle part of fixed block, and through-hole is taper towards piston head one end, is socketed with a casing in through-hole, in casing Portion offers centre bore, and the side of casing towards piston head also forms snap ring, and the outer diameter of snap ring is greater than the diameter of through-hole, snap ring Fixed block is acted against towards on the end face of the side of piston head, a valve rod is also socketed in the centre bore of casing, valve rod is close Piston head side is taper, is further fixed on a compressed spring on the end face of the side far from piston head, compressed spring is extended Centre bore is simultaneously fixed with a capping in end, and the outer diameter of capping is greater than the outer diameter of casing, is also socketed with a resistance outside casing Spring, one end of resistance spring are fixed on end face of the fixed block far from piston head side, and the other end of resistance spring is fixed on In the outer rim of capping.

Preferably, being injected with high pressure nitrogen in cylinder barrel, space in cylinder barrel is divided into low pressure chamber and high pressure chest by fixed block, Side of the fixed block far from piston head is high pressure chest, and fixed block is low pressure chamber close to the side of piston head.

Preferably, the axial line of through-hole and centre bore is same straight line.

Preferably, the outer diameter of casing is identical with the diameter of through-hole, seal groove, seal groove are also formed on casing inner sidewall Inside it is placed with sealing ring.

Preferably, the center of capping offers regulator hole.

Compared with prior art, the utility model has the beneficial effects that the fixed block of the utility model will be in piston sleeve Space is divided into low pressure chamber and high pressure chest, and when being in original state, the pressure of high pressure chest is low pressure cavity pressure and resistance spring The sum of elastic force, snap ring is tightly attached on the end face of fixed block, to make to be mutually isolated between high pressure chest and low pressure chamber, works as low pressure chamber When leakage pressure reduces, the pressure of high pressure chest just will push capping, so that casing is mobile to piston head side relative to fixed block, this When the snap ring of the cannula tip and face opening of fixed block so that the gas of high pressure chest is allowed to escape into low pressure chamber, to improve The pressure of low pressure chamber makes the pressure of high pressure chest be equal to the sum of the elastic force of low pressure cavity pressure and resistance spring again, to realize automatic Tonifying Qi maintains the pressure of low pressure chamber, allows to maintain lifting force for a long time.

Detailed description of the invention

Fig. 1 is the structural schematic diagram of the utility model.

In figure: 1 is cylinder barrel, and 2 be piston rod, and 3 be piston head, and 4 be fixed block, and 5 be casing, and 6 be snap ring, and 7 be valve rod, 8 It is capping for compressed spring, 9,10 be resistance spring.

Specific embodiment

The following will be combined with the drawings in the embodiments of the present invention, carries out the technical scheme in the embodiment of the utility model Clearly and completely describe, it is clear that the described embodiments are only a part of the embodiments of the utility model, rather than whole Embodiment.Based on the embodiments of the present invention, those of ordinary skill in the art are without making creative work Every other embodiment obtained, fall within the protection scope of the utility model.

Referring to Fig. 1, the utility model provides a kind of automatic inflating device pressure balancing piston spring, comprising: cylinder barrel 1 and piston Bar 2, one end of piston rod 2 are protruded into cylinder barrel 1, and the end that piston rod 2 protrudes into cylinder barrel 1 is fixed with piston head 3,1 rodless cavity of cylinder barrel It is inside additionally provided with an equilibrated valve, equilibrated valve includes the fixed block 4 being fixed on 1 inner wall of cylinder barrel, fixed block 4 Middle part offers through-hole, and through-hole is taper towards 3 one end of piston head, is socketed with a casing 5 in through-hole, opens up in the middle part of casing 5 There is centre bore, casing 5 also forms snap ring 6 towards the side of piston head 3, and the outer diameter of snap ring 6 is greater than the diameter of through-hole, snap ring 6 Fixed block 4 is acted against towards on the end face of the side of piston head 3, a valve rod 7, valve rod 7 are also socketed in the centre bore of casing 5 It is taper close to 2 side of piston head, is further fixed on a compressed spring 8, compressed spring on the end face of the side far from piston head 3 8 extend centre bore and are fixed with a capping 9 in end, and the outer diameter for covering 9 is greater than the outer diameter of casing 5, are also socketed outside casing 5 There is a resistance spring 10, one end of resistance spring 10 is fixed on end face of the fixed block 4 far from 3 side of piston head, resistance bullet The other end of spring 10 is fixed in the outer rim of capping 9.

High pressure nitrogen is injected in cylinder barrel 1, space in cylinder barrel 1 is divided into low pressure chamber and high pressure chest, fixed block by fixed block 4 4 sides far from piston head 3 are high pressure chest, and fixed block 4 is low pressure chamber close to the side of piston head 3.

The axial line of through-hole and centre bore is same straight line.

The outer diameter of casing 5 and the diameter of through-hole are identical, and seal groove is also formed on 5 inner sidewall of casing, is placed in seal groove There is sealing ring.

The center of capping 9 offers regulator hole.

Working principle are as follows: space in cylinder barrel is divided into low pressure chamber and high pressure chest by fixed block, high when being in original state The pressure for pressing chamber is the sum of low pressure cavity pressure and the elastic force of resistance spring, and snap ring is tightly attached on the end face of fixed block, casing outer circle Cylinder seal groove inner seal ring is pressed on the tapered surface of fixed block inner via hole, to make mutually to be separated by between high pressure chest and low pressure chamber From when low pressure chamber leakage pressure reduces, the pressure of high pressure chest just will push casing, so that casing fixes block to piston head relatively Side is mobile, and casing external cylindrical surface seal groove inner seal ring is detached from the tapered surface of fixed block inner via hole, the card of cannula tip at this time The face opening of ring and fixed block, so that the gas of high pressure chest is allowed to escape into low pressure chamber, so that improving the pressure of low pressure chamber makes The pressure of high pressure chest is equal to the sum of the elastic force of low pressure cavity pressure and resistance spring again, to realize automatic inflating device, maintains low pressure The pressure of chamber allows to maintain lifting force for a long time.

In the description of the present invention, it should be understood that term " coaxial ", " bottom ", " one end ", " top ", " in The orientation of the instructions such as portion ", " other end ", "upper", " side ", " top ", "inner", " front ", " center ", " both ends " or position are closed System is to be based on the orientation or positional relationship shown in the drawings, and is merely for convenience of describing the present invention and simplifying the description, rather than The device or element of indication or suggestion meaning must have a particular orientation, be constructed and operated in a specific orientation, therefore cannot It is construed as a limitation of the present invention.

In the present invention unless specifically defined or limited otherwise, term " installation ", " setting ", " connection ", " Gu Calmly ", the terms such as " being screwed on " shall be understood in a broad sense, for example, it may be being fixedly connected, may be a detachable connection, or integral； It can be mechanical connection, be also possible to be electrically connected；It can be directly connected, can also indirectly connected through an intermediary, it can be with It is the interaction relationship of the connection or two elements inside two elements, unless otherwise restricted clearly, for this field For those of ordinary skill, the concrete meaning of above-mentioned term in the present invention can be understood as the case may be.

While there has been shown and described that the embodiments of the present invention, for the ordinary skill in the art, It is understood that these embodiments can be carried out with a variety of variations in the case where not departing from the principles of the present invention and spirit, repaired Change, replacement and variant, the scope of the utility model is defined by the appended claims and the equivalents thereof.

Claims (5)

1. a kind of automatic inflating device pressure balancing piston spring, comprising: cylinder barrel is protruded into one end of cylinder barrel and piston rod, the piston rod Interior, the end that the piston rod protrudes into cylinder barrel is fixed with piston head, it is characterised in that: is additionally provided with one in the cylinder barrel rodless cavity A equilibrated valve, the equilibrated valve include the fixed block being fixed in inner wall of cylinder, are opened in the middle part of the fixed block Equipped with through-hole, through-hole is taper towards piston head one end, and a casing is socketed in the through-hole, is offered in the middle part of described sleeve pipe Centre bore, the side of described sleeve pipe towards piston head also form snap ring, and the outer diameter of the snap ring is greater than the diameter of through-hole, described Snap ring acts against fixed block towards on the end face of the side of piston head, and a valve rod is also socketed in the centre bore of described sleeve pipe, The valve rod is taper close to piston head side, is further fixed on a compressed spring, institute on the end face of the side far from piston head It states compressed spring to extend centre bore and be fixed with a capping in end, the outer diameter of the capping is greater than the outer diameter of casing, institute It states and is also socketed with a resistance spring outside casing, one end of the resistance spring is fixed on end of the fixed block far from piston head side On face, the other end of the resistance spring is fixed in the outer rim of capping.

2. a kind of automatic inflating device pressure balancing piston spring according to claim 1, it is characterised in that: note in the cylinder barrel Entering has high pressure nitrogen, and space in cylinder barrel is divided into low pressure chamber and high pressure chest by the fixed block, and the fixed block is far from piston head Side be high pressure chest, the fixed block close to the side of piston head be low pressure chamber.

3. a kind of automatic inflating device pressure balancing piston spring according to claim 1, it is characterised in that: the through-hole is in The axial line in heart hole is same straight line.

4. a kind of automatic inflating device pressure balancing piston spring according to claim 2, it is characterised in that: outside described sleeve pipe Diameter is identical with the diameter of through-hole, and seal groove is also formed on described sleeve pipe inner sidewall, is placed with sealing ring in seal groove.

5. a kind of automatic inflating device pressure balancing piston spring according to claim 4, it is characterised in that: in the capping The heart offers regulator hole.