CN101328947B

CN101328947B - Air pressure telescopic link

Info

Publication number: CN101328947B
Application number: CN2007100286776A
Authority: CN
Inventors: 王春生
Original assignee: ZHOU RUNXI
Current assignee: ZHOU RUNXI
Priority date: 2007-06-19
Filing date: 2007-06-19
Publication date: 2012-06-27
Anticipated expiration: 2027-06-19
Also published as: CN101328947A

Abstract

The invention particularly relates to a pneumatic expansion link, comprising an air reservoir, an air cylinder and a screw, wherein, the air reservoir is inserted in a chamber of the air cylinder; the screw is sleeved on the air reservoir and is in screwed connection on an air chamber port; an opening of the air reservoir is in screwed connection with a piston which is fixedly connected with an air pipe; one end of the air pipe is provided with a throttle valve and a one-way valve; and an air shutter needle is arranged in the air pipe. The invention has the advantages of pure air pressure, constant motion, oil omission, automatic variation of spring elasticity, adjustable speed reduction, weather resistant, low cost, simple process, long service life and so on.

Description

A kind of air pressure telescopic link

Technical field

It is a kind of air pressure telescopic link that the present invention is specifically related to.

Background technique

Original spring, gas spring are divided into two big types, and what existing market was popular is that spring is formed by the steel wire coiling, simple in structure, low cost and other advantages; State Patent Office announces the model utility title: compress the supporting type flexible rod certainly; The patent No. is 200620058318.6, and its structure is: the outer sleeve of end band top is arranged, and the inner sleeve activity of end band top is placed in the outer sleeve; One bindiny mechanism is connected outer sleeve with inner sleeve; Its said bindiny mechanism is a long spring, and this long spring is located in inner sleeve and the outer sleeve, and an end of long spring is fixedly connected in the outer sleeve near an end that comes directly towards; The insertion end of inner sleeve has been horizontally set with a pin, and this pin crosses long spring.

Another kind is a gas spring, and gas spring is that the air pressure by steel wire coiling spring and certain pressure combines, its structure more complicated, and cost is high, complex manufacturing.Its advantage spring force is not easy to change, the spring ratio precision is high.

Above-mentioned deficiency is: 1, the spring force coefficient automatically change big, fracture, can not speed change (need) with installing outward, can not change elasticity automatically, receive environmental influence etc.

Summary of the invention

The objective of the invention is to address the aforementioned drawbacks and a kind of air pressure telescopic link is provided, it is simple in structure, easy to use, be fit to the automatic variable force speed change of varying environment, elastic force is difficult for changing and the not fragile long lifetime.

The following mode of the present invention realizes: comprise air reservoir, cylinder and screw; Air reservoir is inserted in the cavity volume of cylinder; Screw is placed on the air reservoir and is bolted on the air cavity mouth of cylinder, and the opening of its said air reservoir is bolted with piston, is connected with tracheae on the piston; Tracheae one end is provided with air throttle and one-way valve, places relevant air tube in the tracheae.

Said pass air tube, air throttle and one-way valve are integrated forming, and by extending the solar term pipe on the connecting base, have return-air hole to constitute air throttle on the solar term pipe, and solar term pipe pipe shaft also has the air inlet side opening, is with gum cover on the air inlet side opening and constitutes one-way valve.

Said solar term pipe pipe shaft is provided with protuberance in the form of a ring.

Said pass air tube one end is provided with columned syringe needle, closes on the air tube and is with seal ring, and seal ring one side is close to the syringe needle side.

Said piston is provided with the intracavity inter-connection of through hole and tracheae, through hole wherein one section be the inner funnel shape.

The circular surfaces of said air reservoir is provided with groove in the form of a ring, and the interior recess of groove has seal ring.

Circular surfaces is provided with groove in the form of a ring on the said piston, and recess has seal ring in it, with the seal ring formation application of anti-leakage layers on the air reservoir.

The invention has the beneficial effects as follows: use one-way valve and air throttle incorporate between air reservoir and the cylinder, thereby realized pure air pressure, uniform motion, nothing oil, the big I of telescopic spring power change automatically, slow down adjustable, weatherproof, low cost, technology is simple and the life-span is grown etc.

Fig. 1 is a structural representation of the present invention.

Fig. 2 is piston, air throttle, one-way valve and tracheae 5 composite structure schematic representation.

Fig. 3 is the sectional structure meaning diagrammatic sketch at the G-G place of Fig. 2.

Concrete embodiment

Description of drawings:

Below in conjunction with accompanying drawing the present invention is done concrete further explanation.

As shown in the figure; Comprise air reservoir 1, cylinder 2 and screw 3, air reservoir 1 is inserted in the cavity volume of cylinder 2, and screw 3 is placed on the air reservoir 1 and is bolted on the air cavity mouth of cylinder 2; The opening of its said air reservoir 1 is bolted with piston 4; Be connected with tracheae 5 on the piston 4, tracheae 5-end is provided with air throttle 6 and one-way valve 7, places relevant air tube 8 in the tracheae 5.

Said pass air tube 8, air throttle 6 and one-way valve 7 are integrated forming; By extending solar term pipe 602 on the connecting base 601; Have return-air hole 603 to constitute air throttle 6 on the solar term pipe 602, solar term pipe 6 pipe shafts also have air inlet side opening 701, are with gum cover 702 on the air inlet side opening 701 and constitute one-way valve 7.

Said solar term pipe 602 pipe shafts are provided with protuberance 604 in the form of a ring.

Said pass air tube 8 one ends are provided with columned syringe needle 801, close on the air tube 801 and are with seal ring 802, and seal ring 802 1 sides are close to syringe needle 801 sides.

Said piston 4 is provided with the intracavity inter-connection of through hole 401 and tracheae 5, through hole 401 wherein one section be the inner funnel shape.

The circular surfaces of said air reservoir 1 is provided with groove 101 in the form of a ring, and the interior recess of groove 101 has seal ring 102.

Circular surfaces is provided with groove 402 in the form of a ring on the said piston 4, and recess has seal ring 403 in it, with the seal ring 102 formation application of anti-leakage layers on the air reservoir 1.

Working principle is: when the user promotes cylinder 2; Because the piston 4 of air reservoir 1 is when move in cylinder 2 bottoms; Automatically produce certain pressure, in very little stroke, close air tube 8 and backed down, air reservoir 1 air pressure flows to cylinder 2 in and compression gas-pressure forms the two air pressure elastic force that superposes and becomes big very soon; When the pressure of the gas in the cylinder 2 surpasses air reservoir 1 internal air pressure; Gas in the cylinder 2 backflows through one-way valve 7 on the air reservoir 1 in the air reservoir 1; When air reservoir 1 is shifted the end onto; Whole gas are pressed in the air reservoir 1 during cylinder 2 bottom surfaces, and simultaneously just during piston 4 to cylinder 2 bottoms, the gas of cylinder 2 is all compressed into air reservoir 1; Air reservoir 1 atmospheric pressure is with reaction thrust, and beginning is given vent to anger in cylinder 2 by throttle valve 6, and air reservoir 1 is returned, owing to the gas pressure that slowly refluxes through throttle valve 6 makes piston 4 shifted onto former initial position by slack-off speed automatically; Be set at certain-length owing to close air tube 8 length simultaneously; When piston 4 returns to certain-length, pushed to by air pressure on the through hole 401 of piston 4 because close air tube, it closes seal ring 802 its through holes 401 of sealing on the air tube 8; Be in this moment closes gaseity, has formed the use that goes round and begins again; The effect of closing air tube 8 is that control cylinder 2 internal air pressures and air reservoir 1 air pressure have automatic saturated phenomenon; Owing to be the gentle pressure ratio same principle of carrying capacity size, so close air tube 8 control atmospheric pressures and be the reasonable proportioning mutually of carrying capacity, throttle valve 6 is that the control back-flow velocity reaches the deceleration purpose again, and one-way valve 7 is used for to air reservoir 1 air inlet.

Because control cylinder 2 internal air pressures are understood middle pressure with air reservoir 1 air pressure when load capacity is maximum, when user's pulling force when drop-down (thrust) adds downward maximum load power, pulling force will be very little; When be carrying capacity when very little because the required very small piston of air pressure is shifted the position very soon onto is closed an air tube 8 and close, so that cylinder 2 atmospheric pressures are deposited is very little, so also can diminish to drop-down; This air pressure telescopic link also can be applied to train, steamer, lathe and motorcycle or the like.

Claims

1. an air pressure telescopic link comprises air reservoir, cylinder and screw, and air reservoir is inserted in the cavity volume of cylinder; Screw is placed on the air reservoir and is bolted on the air cavity mouth of cylinder, and it is characterized in that: the opening of said air reservoir is bolted with piston, is connected with tracheae on the piston; Tracheae one end is provided with air throttle and one-way valve, places relevant air tube in the tracheae, and closing air tube, air throttle and one-way valve is integrated forming; By extending the solar term pipe on the connecting base, there is return-air hole to constitute air throttle on the solar term pipe, solar term pipe pipe shaft also has the air inlet side opening; Be with gum cover on the air inlet side opening and constitute one-way valve, said pass air tube one end is provided with columned syringe needle, closes on the air tube and is with seal ring; Seal ring one side is close to the syringe needle side, and said piston is provided with the intracavity inter-connection of through hole and tracheae, through hole wherein one section be the inner funnel shape.

2. a kind of air pressure telescopic link according to claim 1 is characterized in that: said solar term pipe pipe shaft is provided with protuberance in the form of a ring.

3. a kind of air pressure telescopic link according to claim 1 is characterized in that: the circular surfaces of said air reservoir is provided with groove in the form of a ring, and the interior recess of groove has seal ring.

4. according to claim 1 or 3 described a kind of air pressure telescopic links, it is characterized in that: circular surfaces is provided with groove in the form of a ring on the said piston, and recess has seal ring in it, with the seal ring formation application of anti-leakage layers on the air reservoir.