CN103438136A

CN103438136A - Air spring

Info

Publication number: CN103438136A
Application number: CN2013103598296A
Authority: CN
Inventors: 杭林生
Original assignee: SUZHOU SHENGNENG MACHINERY CO Ltd
Current assignee: SUZHOU SHENGNENG MACHINERY CO Ltd
Priority date: 2013-08-19
Filing date: 2013-08-19
Publication date: 2013-12-11

Abstract

The invention discloses an air spring. The air spring achieves two-stage buffering of an air pressure spring to impact through a high pressure air chamber and a lower pressure air chamber, the low pressure air chamber is used for absorbing the impact of small stroke under the ordinary working condition, and the high pressure air chamber conducts high pressure air discharging and buffering under the condition that air of the low pressure air chamber is highly compressed. Compared with a traditional air pressure spring, the air spring has the advantages that under the impact of short stroke, the shrunken air camber has better supporting performance and flexibility, while under the large impact, secondary absorption of the impact can be achieved through the assistance of the high pressure air chamber, so that the air spring has remarkable improvement and good technical effects.

Description

A kind of pneumatic spring

Technical field

The present invention designs a kind of pneumatic spring, belongs to the buffering instrument field.

Background technique

Thereby traditional gas spring is just by simply realizing the realization to buffering to pressurization in an air-tight movable sleeve pipe, and because the characteristic of air compressing, pneumatic spring under unexpected severe impact than being easier to occur touch end phenomenon, and the critical pressure of pneumatic spring is many greatly than spring, can't adapt to some sensitivity and require high operating mode.

Summary of the invention

The object of the invention is to: a kind of technological scheme addressed the above problem is provided.

The present invention realizes by the following method:

A kind of pneumatic spring, described pneumatic spring comprises inner tube, outer tube, piston, piston rod, low-pressure chamber, plenum chamber, exhaustion plate, drain tap, supported spring, the valve of mutual socket, described inner and outer tubes are the pipe that an end seals an end opening, opening one end of described inner tube is towards opening one end of outer tube, and described piston, piston rod, low-pressure chamber, plenum chamber, exhaustion plate, drain tap, supported spring are arranged on inner tube inside;

Described valve is arranged on the closed end of inner tube, is communicated with inner tube inside;

Described piston rod one end is fixedly connected with piston, the closed end bottom of the described piston rod the other end and outward appearance is fixedly connected with, described exhaustion plate slides and is fixed on the inner tube middle part, described exhaustion plate central position is provided with a through hole, described drain tap comprises a columned sealing block of ladder and an exhaust jacking rod, the less partial insertion of described drain tap diameter compresses in through hole and by supported spring, one end of described supported spring is fixedly connected with inner tube sealed bottom one end, the other end of described supported spring is connected with the direct larger partial fixing of drain tap, described piston rod is vertically set on the horizontal plane of piston diameter smaller portions, described piston, exhaustion plate, piston and part inner tubal wall form low-pressure chamber,

The tube wall of described piston, exhaustion plate and inner tube sealed end forms plenum chamber;

Be evenly equipped with some gas ports on described exhaustion plate, described plenum chamber and low-pressure chamber are communicated with by gas port;

As further innovation of the present invention, shown in low-pressure chamber inside, also be provided with secondary spring A between piston and exhaustion plate;

As further innovation of the present invention, described plenum chamber inside, be provided with secondary spring B between exhaustion plate and inner tube closed end inwall;

As further innovation of the present invention, the length of described exhaust jacking rod is less than 1/2 of low-pressure chamber's longitudinal length.

beneficial effect

The present invention has realized two sections property bufferings of gas spring impact by a plenum chamber and low-pressure chamber, low-pressure chamber is for the absorption of the impact of little stroke under general operating mode, plenum chamber in the situation that the air of low-pressure chamber by high compression, carry out high pressure gas, and cushioned, the present invention has under the impact of short stroke than traditional gas spring, because the air chamber dwindled has better supportive and sensitivity, and under larger impact, by assisting of plenum chamber, can realize the double absorption of impact, there is significant progress and good technique effect.

The accompanying drawing explanation

Fig. 1 is generalized section of the present invention.

Embodiment

Below in conjunction with accompanying drawing, be described further

A kind of pneumatic spring, described pneumatic spring comprises inner tube 4, outer tube 1, piston 3, piston rod 2, low-pressure chamber, plenum chamber, exhaustion plate 5, drain tap, supported spring 9, the valve 8 of mutual socket, described inner tube 4 and outer tube 1 are the pipe that an end seals an end opening, opening one end of described inner tube 4 is towards opening one end of outer tube 1, and described piston 3, piston rod 2, low-pressure chamber, plenum chamber, exhaustion plate 5, drain tap, supported spring 9 are arranged on inner tube 4 inside;

Described valve 8 is arranged on the closed end of inner tube 4, is communicated with inner tube 4 inside;

Described piston rod 2 one ends are fixedly connected with piston 3, the closed end bottom of described piston rod 2 the other ends and outward appearance is fixedly connected with, described exhaustion plate 5 slides and is fixed on inner tube 4 middle parts, described exhaustion plate 5 central positions are provided with a through hole 11, described drain tap comprises a columned sealing block 6 of ladder and an exhaust jacking rod 7, the partial insertion that described drain tap diameter is less compresses in through hole 11 and by supported spring 9, one end of described supported spring 9 is fixedly connected with inner tube 4 sealed bottom one ends, the other end of described supported spring 9 is connected with the direct larger partial fixing of drain tap, described piston rod 2 is vertically set on the horizontal plane of piston 3 smaller-diameter portion, described piston 3, exhaustion plate 5, sealing block 6 and part inner tube 4 walls form low-pressure chamber,

The tube wall of described sealing block 6, exhaustion plate 5 and inner tube 4 sealed ends forms plenum chamber;

Be evenly equipped with some gas ports 10 on described exhaustion plate 5, described plenum chamber and low-pressure chamber are communicated with by gas port 10.

Shown in low-pressure chamber inside, also be provided with secondary spring A12 between piston 3 and exhaustion plate 5.

Described plenum chamber inside, be provided with secondary spring B13 between exhaustion plate 5 and inner tube 4 closed end inwalls.

The length of described exhaust jacking rod 7 is less than 1/2 of low-pressure chamber's longitudinal length.

This product is when work, because make single air chamber originally become low-pressure chamber by exhaustion plate, the structure that plenum chamber matches, the air capacity of single air chamber is less, described have a lower critical pressure, sensitiveer, because the viscosity reason of the aperture of gas port and air, in the situation of smaller tremors, obvious start can not occur in plenum chamber, when being subject to larger impact, air in low-pressure chamber enters into plenum chamber by gas port, make the pressure of high pressure air indoor air not increase very much, when stroke is compressed into piston touching exhaust jacking rod, plenum chamber is opened, in plenum chamber, compressed gas is drained in low-pressure chamber, realize the double absorption of impact, plenum chamber is because self also have certain stroke space simultaneously, also impact has played buffer function, secondary spring A in the present invention simultaneously and secondary spring B have played the improvement gas spring and have compressed linear effect, make the compression curve of pneumatic spring more close to straight line, promoted stability.

Claims

1. a pneumatic spring, it is characterized in that: described pneumatic spring comprises inner tube, outer tube, piston, piston rod, low-pressure chamber, plenum chamber, exhaustion plate, drain tap, supported spring, the valve of mutual socket, described inner and outer tubes are the pipe that an end seals an end opening, opening one end of described inner tube is towards opening one end of outer tube, and described piston, piston rod, low-pressure chamber, plenum chamber, exhaustion plate, drain tap, supported spring are arranged on inner tube inside;

Be evenly equipped with some gas ports on described exhaustion plate, described plenum chamber and low-pressure chamber are communicated with by gas port.

2. a kind of pneumatic spring as claimed in claim 1 is characterized in that: shown in low-pressure chamber inside, also be provided with secondary spring A between piston and exhaustion plate.

3. a kind of pneumatic spring as claimed in claim 1, it is characterized in that: described plenum chamber inside is provided with secondary spring B between exhaustion plate and inner tube closed end inwall.

4. a kind of pneumatic spring as claimed in claim 1, it is characterized in that: the length of described exhaust jacking rod is less than 1/2 of low-pressure chamber's longitudinal length.