CN202203214U

CN202203214U - Cylinder structure

Info

Publication number: CN202203214U
Application number: CN2011202755046U
Authority: CN
Inventors: 王嘉铭
Original assignee: EASYTORK AUTOMATION CORP
Current assignee: EASYTORK AUTOMATION CORP
Priority date: 2011-08-01
Filing date: 2011-08-01
Publication date: 2012-04-25
Anticipated expiration: 2021-08-01

Abstract

A cylinder structure comprises a cylinder and a control valve device, wherein the cylinder comprises a gas chamber and two pistons; actuating blocks respectively pivoted with two opposite ends of an interlinking block are arranged on each piston; a mandrel is arranged in the center of the interlinking block; when the pistons move, the actuating blocks are driven to move and drive the interlinking block and the mandrel to rotate, so that a valve body is opened or closed; the control valve device mainly comprises a valve structure part, an electromagnetic valve structure part, and a switching part which are integrated; the valve structure part can be communicated with the cylinder through no external fitting pipe; the direction of an airflow entering or getting out of the cylinder can be changed through the control of the electromagnetic valve structure part, so as to change the rotation direction of the mandrel; a safe resetting cylinder or a double-acting cylinder can work alternately through the switching of the switching part; and the valve body can be switched off in emergency through the hand-operated switch of the electromagnetic valve structure part, so that when no external gearbox is connected with the cylinder structure, the requirements of various conditions which are supplied with electricity/gas or not are met.

Description

Air cylinder structure

Technical field

The utility model provides a kind of air cylinder structure; Especially refer to that it technically provides a kind of cylinder collocation control valve device; Reach the effect that double-acting cylinder and safe involution cylinder are changed each other; And can in response to power supply or air feed whether various situation, do not need in addition catcher wheel switch (gear-box) with the person that can do the emergency switch when not having pneumoelectric.

Background technique

The kind of cylinder has many kinds; It all utilizes pressure or torsion to force inner rotor rotation; And then make this cylinder be able to control this rotor to move back and forth, and then the valve arrangement portion that drives on this pipeline opens or closes, it is divided into single action cylinder, double-acting cylinder etc. again; Wherein, the single action cylinder then is used for the valve body of the safe involution of needs.Traditional single action cylinder generally all is to lean on pressure spring, and compresses the answer power that rear spring is disengaged; Drive the unlatching of valve body or close, when the source of the gas supply cylinder is arranged, must overcome the tension force of spring earlier; Could drive the running of rotor, to open or valve body, so effectively torsion will successively decrease along with the drag of spring; There is not the situation of source of the gas, the answer power of spring capable of using, and then the playback of drive rotor is to open or throttle down; This is so-called safe involution, and the torsion of all outputs will successively decrease along with the involution of spring; And the running of double-acting cylinder generally all is the necessary condition that is supplied as with source of the gas, when source of the gas is supplied; With the mode of air intake-exhaust, drive the unlatching of valve body or close, but when not having source of the gas; Cylinder just can not move, and like the answer power of the reliable spring of single action cylinder, can not open or valve body; But double-acting cylinder is when having the source of the gas supply, and the torsion of switch wants high more than the single action cylinder, traditional single action and double-acting cylinder; Generally all must lean on solenoid valve,, reach the unlatching of valve body or close by the cooperation of pneumoelectric.Yet under the situation of disconnected wind, if want urgent switch valve body, traditional practice is to install handwheel switch (gear-box) additional in cylinder bottom; Can make emergency switch when not having source of the gas to work as power,, be its disappearance precisely because occupation space and assembly cost etc. are considered; Moreover; With production firm and dealer's position, must produce and stock's single action and two moving two kinds of different cylinders, with different demands in response to the user; Can't provide single product can supply two moving switchings that reach between single action, cause the increase of production kind and the lifting of inventory cost.

Summary of the invention

The purpose of the utility model is to provide a kind of air cylinder structure, and it is simple in structure, and is easy to operate; Workout cost increases, maintenance rate is high and the problem of trouble; And quick and convenient conversion double-acting cylinder of ability and safe involution cylinder can reduce cost, and effectively reduce warehousing pressure.

For realizing above-mentioned purpose, the utility model discloses a kind of air cylinder structure, it is characterized in that including:

One cylinder; This cylinder comprises an air chamber and two pistons; This two-piston is divided into one first containing space and 2 second containing spaces with this cylinder interior respectively; This first containing space is positioned between this two-piston; This second containing space lays respectively at this piston dual-side, and this first and second containing space do not communicate with this air chamber, on this two-piston, is provided with relative one towards this first containing space place respectively and makes motion block; Respectively this makes to be equipped with on the motion block pivot again; This pivot articulates with the opposite end of a linked block respectively each other, and this linked block center is provided with one and when this piston moves, drives this and move and drive simultaneously the axle that this linked block rotates as motion block again, is provided with a 1A, a 1B, a 1C and position, a 1D hole in addition in this cylinder side; This position, 1A hole and this position, 1B hole directly are communicated with this air chamber; And this position, 1A hole is embedded with check valve, and this position, 1C hole communicates with this first containing space so that air-flow can get into this first containing space that this piston is promoted and then make this linked block drive this axle to be rotated counterclockwise and to drive valve body and open to this second containing space simultaneously, and this position, 1D hole communicates with this second containing space and so that air-flow can get into this second containing space this piston promoted and then make this this axle of linked block drive valve body that turns clockwise to this first containing space simultaneously; And

The one control valve device of handover security involution pattern and double action fast when answering different situations to take place, this control valve device communicate with this cylinder by one and the valve arrangement portion, that gas is held in this air chamber inside that the air-flow of a gas pressure source imports this cylinder can control break be passed in and out electromagnetic valve structure portion and an enable manual handover security involution pattern and the double action of sense of rotation of airflow direction and then this this axle of linked block drive of conversion of this first containing space and this second containing space of this cylinder so that this control valve device has the switching part institute one of three control members constitutes.

Wherein, Air cylinder structure as claimed in claim 1; It is characterized in that; This valve arrangement portion is provided with respectively and this position, 1A hole of this cylinder, an air chamber air admission hole, the air chamber venthole that this position, 1B hole communicates, and a single action pipeline communicates with this air chamber air admission hole, and the moving pipeline of a pair of communicates with this air chamber venthole; And this single action pipeline is taken over by a single action and is communicated with this switching part; The moving pipeline of this pair is communicated with this switching part by moving adapter of a pair of, and this valve arrangement portion is provided with one No. 1 holes, one No. 2 holes, one No. 3 holes, one No. 4 holes, one No. 5 holes, a via hole and the axis of the pistons in addition, and wherein this No. 1 hole is an air admission hole; And these No. 3 holes and this No. 5 holes are steam vent, and this via hole is positioned on the moving pipeline of this pair and should communicates with these No. 2 holes or this No. 4 holes when changing the air-flow that decides to come out from this air chamber venthole through the moving pipeline of this pair based on the position whether this axis of the piston is pressed; What this electromagnetic valve structure portion comprised position, a 2A hole, position, at least one 2B hole and controlled whether this position, 2A hole seal one makes motion block; The other air-flow that gets into this position, 2A hole that makes gets at least one pipeline that compiles that communicates with this position, 2B hole thereby this position, 2B hole is positioned at this position, 2A hole; And have one and this is compiled in the pipeline air-flow guide in the compacting pipeline and see through air-flow and pass this switching part by this compacting pipeline and get into the annular space of suppressing this axis of the piston in this valve arrangement portion; Wherein, this electromagnetic valve structure portion more comprises this hand switch of doing this position, 2A hole unlatching of motion block switching or closing of enable manual adjustment; This switching part is provided with a connecting pipeline that communicates with this position, 2A hole of this electromagnetic valve structure portion, and tool one can move axially and decide air-flow to take over the switching shaft of the safe involution pattern of this switching part by the moving pipeline of this pair through this single action through moving double action or this single action pipeline of taking over this switching part of this pair through moving to switch.

Wherein, this air chamber is divided into the place, two ends of this cylinder and communicates by a connecting pipeline.

Wherein, this cylinder has a valve that connects this air chamber and outside, and this gas pressure source is inner by this valve air feed to this air chamber.

Pass through said structure; The utility model can reach the effect that double-acting cylinder and safe involution cylinder are changed each other fast; All air-flow paths are all between air cylinder structure and control valve device; Do not need external any pipe arrangement to connect; Also not needing to connect in addition gear-box or pipe arrangement in addition can in response to power supply or air feed whether various situation, and the air cylinder structure of the utility model can see through the control valve device and make the utility model under not external any pipe arrangement, reach double-acting cylinder fast to change the effect in response to various situation generations each other with safe involution cylinder; Commonly use that to be single action cylinder or double-acting cylinder need install gear-box or pipe arrangement additional when taking place in response to different situations no matter improve; Cause that expense increases, maintenance rate is high and the problem of trouble, and see through the utility model can quick and convenient conversion double-acting cylinder and safe involution cylinder, manufacturer can not need spend the production line that great amount of cost is developed different component on the one hand; The dealer also need not spend great amount of cost and buy single action and two moving two kinds of cylinders on the other hand, can effectively reduce warehousing pressure.

Description of drawings

Fig. 1: the schematic perspective view of the utility model.

Fig. 2: the cylinder interior decomposing schematic representation of the utility model.

Fig. 3: the cylinder partial schematic diagram of the utility model.

Fig. 3 A: the cylinder partial cutaway schematic of the utility model.

Fig. 3 B: another partial cutaway schematic of the cylinder of the utility model.

Fig. 4: the control valve device decomposing schematic representation of the utility model.

Fig. 5: another decomposing schematic representation of control valve device of the utility model.

Fig. 6: the control valve device top view of the utility model.

Fig. 6 A: the control valve device generalized section of the utility model.

Fig. 6 B: another generalized section of control valve device of the utility model.

Fig. 7: the control valve device side view of the utility model.

Fig. 7 A: the another generalized section of control valve device of the utility model.

Fig. 8 A: the utility model one embodiment's safety involution pattern regular event schematic representation.

Fig. 8 B: the utility model one embodiment's safety involution pattern electromagnetic valve structure portion is illustrative view not.

Fig. 8 C: the utility model one embodiment's safety involution pattern air supply source illustrative view without air supply.

Fig. 9 A: the utility model one embodiment's double action regular event schematic representation.

Fig. 9 B: the utility model one embodiment's double action electromagnetic valve structure portion is illustrative view not.

Fig. 9 C: the utility model one embodiment's double action air supply source illustrative view without air supply.

Embodiment

Consult shown in Fig. 1 to Fig. 9 C, the utility model provides a kind of air cylinder structure, comprising: a cylinder 1; This cylinder 1 comprises an air chamber 11 and two pistons 12, and this two-piston 12 is divided into one first containing

space

17 and 2 second containing spaces 18 with this cylinder 1 inside respectively, and this first containing space 17 is positioned at 12 in two these pistons; And this second containing space 18 lays respectively at two these piston 12 dual-sides, and wherein, this air chamber 11 is divided into the place, two ends of this cylinder 1; And has a dividing plate 110 at this air chamber 11 and 1 in this cylinder; First and second containing

space

17,18 of this air chamber 11 and this is not communicated, and this 2 air chambers 11 communicates by a connecting pipeline 111, on two these pistons 12, be provided with relative one respectively and make motion block 121 towards these first containing space, 17 places; Respectively this makes to be equipped with on the motion block 121 pivot 122 again; This pivot 122 articulates with the opposite end of a linked block 19 respectively each other, and these linked block 19 centers are provided with an axle 191 again, when this piston 12 each other near or when mobile; Can drive this makes motion block 121 and moves and drive simultaneously this linked block 19 and rotate; Be provided with position, a 1A hole 13, position, a 1B hole 14, position, a 1C hole 15 and position, a 1D hole 16 in this cylinder 1 side in addition, this position, 1A hole 13 and this position, 1B hole 14 directly are communicated with this air chamber 11, and this position, 1A hole 13 is embedded with check valve; This position, 1C hole 15 communicates with this first containing space 17 through one first pipeline 171; Make air-flow can get into this first containing space 17 this piston 12 is promoted to this second containing space 18, and then make these linked block 19 these axles 191 of drive be rotated counterclockwise the unlatching of drive valve body, this position, 1D hole 16 communicates with this second containing space 18 through one second pipeline 181; Make air-flow can get into this second containing space 18 this piston 12 is promoted to this first containing space 17, and then make this linked block 19 drive these axles 191 valve body that turns clockwise; An and control valve device 2; This control valve device 2 is when taking place in response to different situations; The control valve device 2 of handover security involution pattern and double action fast; It mainly is made up of a valve arrangement portion 21, an electromagnetic

valve structure portion

23 and 25 one of a switching part; This valve arrangement portion 21 communicates with this cylinder 1 and can the air-flow of a gas pressure source 3 be imported in this air chamber 11 of this cylinder 1 and holds gas; Wherein this valve arrangement portion 21 can be provided with an air chamber inlet hole 211, an air chamber air outlet hole 212 communicates with this position, 1A hole 13, this position, 1B hole 14 of this cylinder 1 respectively, and a single action pipeline 213 communicates with this air chamber inlet hole 211, and the moving pipeline 214 of a pair of communicates with this air chamber air outlet hole 212; And this single action pipeline 213 is taken over 253 by a single action and is communicated with this switching part 25; The moving pipeline 214 of this pair is taken over 252 and is communicated with this switching part 25 by a pair of is moving, and this valve arrangement 21 is provided with 218, one No. 5 holes, 217, one No. 4 holes, 216, one No. 3 holes, 215, one No. 2 holes, one No. 1 holes 219, a via hole 210 and a piston shaft 2100 in addition, and wherein this No. 1 hole 215 is an inlet hole; And these No. 3 holes 217 and this No. 5 holes 219 are exhaust port; This via hole 210 is positioned on the moving pipeline 214 of this pair, and according to the position change whether this piston shaft 2100 is pressed, and should communicate with these No. 2 holes 216 or this No. 4 holes 218 when deciding the air-flow that comes out from this air chamber air outlet hole 212 through the moving pipeline 214 of this pair; If No. 2 holes 216 of this via hole 210 and this communicate; Then air-flow will be from these No. 2 holes 216 gets into this first pipelines 171 of this cylinders 1 by this position, 1C hole 15 of this cylinder 1, makes air-flow can get into this first containing space 17 this piston 12 is promoted to this second containing space 18, and then make this linked block 19 drive these axles 191 to be rotated counterclockwise and to drive the valve body (not shown) and open; If this via hole 210 communicates with No. 4 holes 218; Then air-flow will be from these No. 4 holes 218 gets into this second pipelines 181 of this cylinders 1 by this position, 1D hole 16, makes air-flow can get into this second containing space 18 this piston 12 is promoted to this first containing space 17, and then make this linked block 19 drive these axles 191 to turn clockwise and drive the valve body (not shown) and close; This electromagnetic valve structure portion 23 of this control valve device 2 can determine air communication whether to cross; Whether this piston shaft 2100 that determines this valve arrangement portion 21 is pressed and changes this first containing space 17 of this cylinder 1 of turnover and the airflow direction of this second containing space 18; And then this linked block 19 of conversion drives these axle 191 sense of rotation; It comprises mainly whether position, a 2A hole 231, position, at least one 2B hole 232 and this position, 2A hole 231 of control seal makes motion block 233; It is other that this position, 2B hole 232 is positioned at this position, 2A hole 231; Make the air-flow that gets into this position, 2A hole 231 get at least one the compiling in the pipeline 234 that communicates with this position, 2B hole 232; And by an annular space 235 this is compiled that air-flows guide in the compacting pipeline 236 in the pipeline 234; See through air-flow and pass this switching part 25 by this compacting pipeline 236 and get into these piston shaft 2100 of compacting in this valve arrangement portion 21, this does that motion block 233 can see through that this electromagnetic valve structure portion 23 whether supply power or switches via a manual switch 237 to make this position, 2A hole 231 open or close, by these position, 2A hole 231 unlatchings or close and determine whether conducting of this position, 2B hole 232 and this compacting pipeline 236; But these switching part 25 manual switchover safety involution pattern and double actions; And these switching part 25 tools one can axially movable switching shaft 254; And see through a connecting pipe road 251 and communicate with this position, 2A hole 231 of this electromagnetic valve structure portion 23, by the mobile switching of this switching shaft 254 decide air-flow by the moving pipeline 214 of this pair through this pair move adapter 252 to the double action of this switching part 25 or this single action pipeline 213 through these single action adapter 253 safe involution patterns to this switching part 25.

The utility model reality is when safety involution pattern and double action use; Under because of power failure or other situation, cause this electromagnetic valve structure portion 23 not starts; Or this gas pressure source 3 is during air feed, the actuator state of the utility model neither with, following in following several kinds of situation divisions: as at first to see also shown in Fig. 2 to Fig. 6 B and Fig. 8 A; Under the normal operation of safety involution pattern; This moment, this electromagnetic valve structure portion 23 opened because of energising makes this position, 2A hole 231, and the part air-flow of these gas pressure source 3 supplies gets into this switching part 25 and these electromagnetic valve structure portion 23 inside via this single action pipeline 213, and then suppresses this piston shaft 2100 in this valve arrangement portion 21; And another of these gas pressure source 3 supplies partly air-flow gets into through this No. 1 hole 215; And get into via the position, 1A hole of this cylinder 1 13 and be full of this air chamber 11 by this air chamber inlet hole 211, the air-flow of this air chamber 11 is got in this via hole 210 of these valve arrangement portions 21 via this air chamber air outlet hole 212 by this position, 1B hole 14, and is got in these first containing spaces 17 through this position, 1C hole 15 by these No. 2 holes 216; Promote this piston 12 and move, and then make these linked block 19 these axles 191 of drive be rotated counterclockwise the unlatching of drive valve body to second containing space 18.

Other sees also shown in Fig. 2 to Fig. 6 B and Fig. 8 B; Under safety involution pattern situation; When having a power failure or other situations when causing the 23 not starts of this electromagnetic valve structure portion; This position, 2A hole 231 of this electromagnetic valve structure portion 23 is closed, and the part air-flow of these gas pressure source 3 supplies can't get into this switching part 25 and these electromagnetic valve structure portion 23 inside via this single action pipeline 213, and this moment, these valve arrangement portion 21 these interior piston shaft 2100 were not pressed; The air-flow that sees through these gas pressure source 3 supplies gets into through this No. 1 hole 215; And get into via the position, 1A hole of this cylinder 1 13 and be full of this air chamber 11 by this air chamber inlet hole 211, the air-flow of this air chamber 11 is got in this via hole 210 of these valve arrangement portions 21 via this air chamber air outlet hole 212 by this position, 1B hole 14, and is got in this second containing space 18 of these cylinders 1 through this position, 1D hole 16 by these No. 4 holes 218; Promote this piston 12 and move, and then make this linked block 19 drive these axles 191 valve body that turns clockwise to this first containing space 17.

Other sees also shown in Fig. 2 to Fig. 6 B and Fig. 8 C; In these electromagnetic valve structure portion 23 starts of safety involution pattern but this gas pressure source 3 not under the air feed situation; Do not have air communication this moment and cross this switching part 25 and this electromagnetic valve structure portion 23, this piston shaft 2100 is not pressed, this moment, these air chamber 11 interior air-flows were got in this via hole 210 of these valve arrangement portions 21 via this air chamber air outlet hole 212 by this position, 1B hole 14; And 16 get in this second containing space 18 of these cylinders 1 through this position, 1D hole by these No. 4 holes 218; Promote this piston 12 and move to this first containing space 17, and then make this linked block 19 drive these axles 191 valve body that turns clockwise, this is so-called safe involution.

Other sees also shown in Fig. 2 to Fig. 6 B and Fig. 9 A; Under the double action normal operation; This moment, this electromagnetic valve structure portion 23 opened because of energising makes this position, 2A hole 231; The air-flow of this gas pressure source 3 supplies is got into by this No. 1 hole 215, and is got into via the position, 1A hole 13 of this cylinder 1 and be full of this air chamber 11 by this air chamber inlet hole 211, and the part air-flows in this air chamber 11 are come out through this air chamber air outlet hole 212 by this position, 1B hole 14; And via moving pipeline 214 entering of this pair this switching part 25 and these electromagnetic valve structure portion 23 inside; And then suppress this piston shaft 2100 in this valve arrangement portion 21, and the part air-flows in this air chamber 11 get in this via hole 210 of these valve arrangement portions 21 via this air chamber air outlet hole 212 by this position, 1B hole 14, and get in these first containing spaces 17 through this position, 1C hole 15 by these No. 2 holes 216; Promote this piston 12 and move, and then make these linked block 19 these axles 191 of drive be rotated counterclockwise the unlatching of drive valve body to second containing space 18.

Other sees also shown in Fig. 2 to Fig. 6 B and Fig. 9 B; Under the double action situation; When having a power failure or other situations when causing the 23 not starts of this electromagnetic valve structure portion, this position, 2A hole 231 of this electromagnetic valve structure portion 23 is closed, and this moment, this piston shaft 2100 was not pressed; The air-flow that sees through these gas pressure source 3 supplies gets into through this No. 1 hole 215; And get into via the position, 1A hole of this cylinder 1 13 and be full of this air chamber 11 by this air chamber inlet hole 211, these air chamber 11 inner air-flows are got in this via hole 210 of these valve arrangement portions 21 via this air chamber air outlet hole 212 by this position, 1B hole 14, and are got in this second containing space 18 of these cylinders 1 through this position, 1D hole 16 by these No. 4 holes 218; Promote this piston 12 and move, and then make this linked block 19 drive these axles 191 valve body that turns clockwise to this first containing space 17.

Other sees also shown in Fig. 2 to Fig. 6 B and Fig. 9 C; In these electromagnetic valve structure portion 23 starts of double action but this gas pressure source 3 not under the air feed situation; This electromagnetic valve structure portion 23 opens because of energising makes this position, 2A hole 231; This moment, these air chamber 11 interior part air-flows were still come out through this air chamber air outlet hole 212 by this position, 1B hole 14; And via moving pipeline 214 entering of this pair this switching part 25 and these electromagnetic valve structure portion 23 inside, and then suppress this piston shaft 2100 in this valve arrangement portion 21, and the part air-flows in this air chamber 11 are got in this via hole 210 of these valve arrangement portions 21 via this air chamber air outlet hole 212 by this position, 1B hole 14; And, remain on the position of unlatching (constant) by these No. 2 holes 216 this piston 12 of compacting in these position, 1C hole 15 these first containing spaces 17 of entering.

Wherein, This cylinder 1 has one and connects this air chamber 11 and outside valve 10; This gas pressure source 3 also can be directly by these valve 10 air feed to these air chamber 11 inside, when reaching safe involution pattern or double action, in response to the purpose person that various situation take place such as whether supply power of this electromagnetic valve structure portion 23.

Preamble system is that the technical characteristics of the utility model carries out bright specifically to the preferred embodiment of the utility model; Only, the personage who is familiar with this technology is when can changing and revise the utility model under the spirit that does not break away from the utility model and principle, and these changes and modification, all should be covered by in the category that following claim defines.

Claims

1. an air cylinder structure is characterized in that, includes:

2. air cylinder structure as claimed in claim 1; It is characterized in that; This valve arrangement portion is provided with respectively and this position, 1A hole of this cylinder, an air chamber air admission hole, the air chamber venthole that this position, 1B hole communicates; One single action pipeline communicates with this air chamber air admission hole; The moving pipeline of a pair of communicates with this air chamber venthole, and this single action pipeline taken over by a single action and communicate with this switching part, and the moving pipeline of this pair moves adapter by a pair of and communicates with this switching part; And this valve arrangement portion is provided with one No. 1 holes, one No. 2 holes, one No. 3 holes, one No. 4 holes, one No. 5 holes, a via hole and the axis of the pistons in addition; Wherein this No. 1 hole is an air admission hole, and these No. 3 holes and this No. 5 holes are steam vent, and this via hole is positioned on the moving pipeline of this pair and should communicates with these No. 2 holes or this No. 4 holes when changing the air-flow that decides to come out from this air chamber venthole through the moving pipeline of this pair based on the position whether this axis of the piston is pressed; What this electromagnetic valve structure portion comprised position, a 2A hole, position, at least one 2B hole and controlled whether this position, 2A hole seal one makes motion block; The other air-flow that gets into this position, 2A hole that makes gets at least one pipeline that compiles that communicates with this position, 2B hole thereby this position, 2B hole is positioned at this position, 2A hole; And have one and this is compiled in the pipeline air-flow guide in the compacting pipeline and see through air-flow and pass this switching part by this compacting pipeline and get into the annular space of suppressing this axis of the piston in this valve arrangement portion; Wherein, this electromagnetic valve structure portion more comprises this hand switch of doing this position, 2A hole unlatching of motion block switching or closing of enable manual adjustment; This switching part is provided with a connecting pipeline that communicates with this position, 2A hole of this electromagnetic valve structure portion, and tool one can move axially and decide air-flow to take over the switching shaft of the safe involution pattern of this switching part by the moving pipeline of this pair through this single action through moving double action or this single action pipeline of taking over this switching part of this pair through moving to switch.

3. air cylinder structure as claimed in claim 1 is characterized in that, this air chamber is divided into the place, two ends of this cylinder and communicates by a connecting pipeline.

4. air cylinder structure as claimed in claim 1 is characterized in that, this cylinder has a valve that connects this air chamber and outside, and this gas pressure source is inner by this valve air feed to this air chamber.