CN2394042Y - Pneumatic actuator - Google Patents

Abstract

The utility model discloses a pneumatic actuator, which is composed of an upper end cover, a middle annular member, a lower end cover, an upper diaphragm which is clamped between the upper end cover and the upper end of the middle annular member, a lower diaphragm which is clamped between the lower end cover and the lower end of the middle annular member, etc. The upper diaphragm forms an inverted basin-shaped structure, the lower end of the diaphragm wall of the upper diaphragm is turned outwards to form a V-shaped foot edge, the lower diaphragm forms an inverted cyathiform structure, and the outside of the upper part of the diaphragm wall of the lower diaphragm is provided with a break angle gamma. The structural forms of the special diaphragms can make the utility model complete the execution and the reset action of a mechanism without the exogenic action of a spring. The utility model has the characteristics of simple structure, flexible action, stable and reliable operation, long service life, etc.

Description

A kind of pneumatic actuating device

The utility model relates to the device with the source of the gas work done.Generally all be used for fields such as pump, valve or pneumatic drilling tool.

Before the utility model proposes, utilize actuator's kind of pneumatics a lot, no matter single chamber monofilm structure or promote to carry out the bar work done by piston rod all acts on the diaphragm by an external bleed pressure, make it to produce pressure reduction and move.But when restPosing, also need lean on the spring force on the pallet to restore, therefore, there is the drawback of two aspects at least in traditional pneumatic execution technique: the one, and monofilm structure, its diaphragm poor flexibility, easily aging cracking; Secondly, spring is on the pressure condition for a long time, easily problem such as fatigue, the spring that becomes rusty extremely even take place to break when motion is frequent.Generally speaking, short, the maintenance difficult of the pneumatic actuating device complex structure of prior art, working life.

The purpose of this utility model is to solve the drawback that existing pneumatic actuator exists, and designs a kind of special air chamber structure and special-shaped diaphragm, utilizes less bleed pressure, makes pneumatic actuating device can reach best working efficiency.

Realize that concrete technological scheme of the present utility model is: this pneumatic actuating device comprises upper end cap, intermediate annular member and lower end cap, accompany upper diaphragm between upper end cap and the intermediate annular member upper end, upper diaphragm is the upside-down mounting bathtub construction, design has the reinforcement disk of the one of casting with its embedding in the middle of its film top, disc centre is provided with the connecting rod through hole, outwards overturning and form angle α in its membranous wall lower end is 5-120 ° V-type pin limit, and design has the sealed groove that matches with intermediate annular member on the V-type pin limit; Accompany down diaphragm between lower end cap and the intermediate annular member lower end, following diaphragm is down cup-shaped structure, its center, film top is provided with the execution bar that is cast as one with its embedding, its membranous wall upper inner is 10-90 ° with the angle β that carries out bar, it is 100-150 ° that the membranous wall upper outside is provided with knuckle γ, the membranous wall bottom is parallel with the execution bar, and its end limit is provided with the sealed groove that matches with lower end cap; The space that upper end cap and upper diaphragm enclose structure forms air chamber, and the air chamber opening is located on the upper end cap, and the connecting rod through hole that connecting rod passes on the upper end cap combines as a whole with execution bar screw thread.

Superiority such as the utility model is compared with existing pneumatic actuating device, has to use air pressure range wide, is active in one's movements, and is simple in structure, and stability is good can be applicable to the pneumatic control equipment of Remote especially.

Below in conjunction with accompanying drawing the utility model is described in further detail:

Accompanying drawing is that cuing open of a kind of pneumatic actuating device shown structural representation.

Pneumatic actuating device shown in the figure, have upper end cap 1, intermediate annular member 3 and lower end cap 5, clamping has upper diaphragm 2 between upper end cap 1 and the intermediate annular member 3, and clamping has following diaphragm 4 between lower end cap 5 and intermediate annular member 3 lower ends, by attachment bolt it is connected firmly locking.Upper diaphragm 2 is the upside-down mounting bathtub construction, and embedding is cast with reinforcement metal disk 8 in the middle of its film top, and disk 8 centers have the connecting rod through hole.Outwards overturning and form angle α in its membranous wall lower end can be 5-150 ° V-type pin limit, and angle α scope preferably is 20-60 °, and upper diaphragm 2 its resiliently deformables and the reseting performance of this angular range are all better.Following diaphragm 4 is down cup-shaped structure, its film top center embedding is cast with carries out bar 6, and its membranous wall upper inner can be 10-90 ° with the angle β that carries out bar 6, and preferable scope is 30-50 °, the knuckle γ of its membranous wall upper outside design is generally 100-150 °, and preferable scope is 120-140 °.Equally, it also is for diaphragm can have comparison better elastic and reseting performance that the β angle of following diaphragm 4 and the numerical value at γ angle are chosen, with the actuating device that adapts to different size to carrying out the requirement of bar displacement amount.The membranous wall bottom of following diaphragm 4 is parallel with execution bar 6, and its end limit is provided with the sealed groove that matches with lower end cap 5, has good sealing to guarantee itself and the external world.The space that upper end cap 1 and upper diaphragm 2 are surrounded forms the air chamber that the control source of the gas enters, and the V-type pin limit of upper diaphragm 2 is provided with the sealed groove that matches with intermediate annular member 3, to guarantee the good anti-gas-leak performance of air chamber, makes the device stable and reliable operation.Suction port 10 designs of air chamber are on upper end cap 1, and connecting rod 7 passes upper end cap 1, sleeve 9 and butterfly gasket 11 and combines as a whole with carrying out bar 6 screw threads, and the setting of butterfly type packing ring 11 plays a part protection diaphragm 4 down.

In the utility model when work,, the control source of the gas enters air chamber from air chamber opening 10, and the film top of upper diaphragm 2 is moved down by the source of the gas press belt bar 7 that is dynamically connected, and the angle α on V-type pin limit changes from small to big, and membranous wall produces distortion elasticity of saving potential energy.At present diaphragm 4 also moves down under the drive of carrying out bar 6 together, and angle β and knuckle γ are by diminishing greatly, and its membranous wall is corresponding deformation savings potential energy also.When the control source of the gas removed from air chamber, diaphragm upwards resetted under the releasable effect of himself elastic potential up and down, up to the shape of recovering its original state, promptly finished a work cycle.

Claims (5)

1. pneumatic actuating device, comprise upper end cap (1), intermediate annular member (3) and lower end cap (5), it is characterized in that: accompany upper diaphragm (2) between upper end cap (1) and intermediate annular member (3) upper end, upper diaphragm (2) is the upside-down mounting bathtub construction, design has the reinforcement disk (8) of the one of casting with its embedding in the middle of its film top, disk (8) center is provided with the connecting rod through hole, outwards overturning and form angle α in its membranous wall lower end is 5-120 ° V-type pin limit, and design has the sealed groove that matches with intermediate annular member (3) on the V-type pin limit; Accompany down diaphragm (4) between lower end cap (5) and intermediate annular member (3) lower end, following diaphragm (4) is down cup-shaped structure, its center, film top is provided with the execution bar (6) that is cast as one with its embedding, its membranous wall upper inner is 10-90 ° with the angle β that carries out bar (6), it is 100-150 ° that the membranous wall upper outside is provided with knuckle γ, the membranous wall bottom is parallel with execution bar (6), and its end limit is provided with the sealed groove that matches with lower end cap (5); The space that upper end cap (1) and upper diaphragm (2) enclose structure forms air chamber, and air chamber opening (10) is located on the upper end cap (1), and the connecting rod through hole that connecting rod (7) passes on the upper end cap (1) combines as a whole with execution bar (6) screw thread.

2. pneumatic actuating device according to claim 1 is characterized in that: said connecting rod (7) combines as a whole with execution bar (6) screw thread by sleeve (9) and saucer washer (11).

3. pneumatic actuating device according to claim 1 and 2 is characterized in that: the angle α on the V-type pin limit of said upper diaphragm 2 is 20-60 °.

4. pneumatic actuating device according to claim 1 and 2 is characterized in that: said diaphragm 4 membranous wall upper inner down are 30-50 ° with the angle β that carries out bar (6).

5. pneumatic actuating device according to claim 1 and 2 is characterized in that: the said knuckle γ of diaphragm (4) membranous wall upper outside down is 120-140 °.

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