CN116379206A

CN116379206A - Force-direction conversion type pneumatic actuator

Info

Publication number: CN116379206A
Application number: CN202310453042.XA
Authority: CN
Inventors: 史俊博
Original assignee: Ningbo Aiximei Industrial Automation Co ltd
Current assignee: Ningbo Aiximei Industrial Automation Co ltd
Priority date: 2023-04-25
Filing date: 2023-04-25
Publication date: 2023-07-04

Abstract

The invention discloses a force-to-conversion type pneumatic actuator, which comprises an actuator main body, wherein the bottom end of the actuator main body is connected with an actuator output seat, the actuator output seat is fixedly connected with the actuator main body through a plurality of fastening bolts, the outer side surface of the actuator main body is provided with an upper air inlet hole and a lower air inlet hole, the upper end of the inner part of the actuator main body is fixedly provided with a piston positioning sleeve, the inner side of the piston positioning sleeve is longitudinally provided with a piston in a sliding manner, the outer side of the piston positioning sleeve is sleeved with a spring, the bottom end of the spring extends to the skirt position of the bottom end of the piston, the force-to-conversion type pneumatic actuator can push the piston to longitudinally reciprocate in a limited space through compressed air in a pneumatic cylinder, and the piston displacement generated by the longitudinal movement enables the rectangular threads on the inner side of the piston to generate moment with the rectangular threads on the outer side of an upper coupling shaft, so that the upper coupling shaft is driven to become transverse force to be output through longitudinal force; and the whole structure is more compact, and the installation is convenient.

Description

Force-direction conversion type pneumatic actuator

Technical Field

The invention belongs to the technical field of pneumatic actuators, and particularly relates to a force-to-direction conversion type pneumatic actuator.

Background

The pneumatic actuator is an actuating device for opening and closing or regulating a valve by using air pressure, and is also called a pneumatic actuating mechanism or a pneumatic device, but is also called a pneumatic head in common use, the pneumatic actuator is sometimes provided with a certain auxiliary device, the valve positioner and a hand wheel mechanism are commonly used, the valve positioner is used for improving the performance of the actuator by using a feedback principle, the actuator can accurately position according to a control signal of a controller, and the hand wheel mechanism is used for directly operating the control valve when a control system fails due to power failure, air interruption and failure of the controller or the actuating mechanism so as to maintain normal production.

The whole structure of the existing actuator is complex, so that the whole volume is large, the existing actuator cannot be installed in a narrow space, the existing actuator cannot push the piston to reciprocate in a limited space through compressed air in the air pressure cylinder body, and the piston is changed into transverse force through longitudinal force to be output.

Disclosure of Invention

The present invention is directed to a force-to-direction conversion type pneumatic actuator, which solves the above-mentioned problems of the prior art.

In order to achieve the above purpose, the present invention provides the following technical solutions: the utility model provides a power is to pneumatic actuator of conversion formula, includes the actuator main part, the top of actuator main part closes soon and installs the actuator upper cover, the top of actuator upper cover is provided with the window, the bottom of actuator main part is provided with the actuator output seat through a plurality of fastening bolt fixedly connected with, the outside surface of actuator main part is provided with inlet port and lower inlet port, the inside upper end of actuator main part is fixedly provided with piston positioning sleeve, the inboard longitudinal sliding of piston positioning sleeve is provided with the piston, the outside cover of piston positioning sleeve is equipped with the spring, and the bottom of spring extends to the bottom shirt rim position of piston, the inboard of piston is installed through rectangular screw cooperation and is gone up the universal driving axle, the top of piston is connected with piston fastening screw through the screw-in, just the top of last piston fastening screw is provided with the position indication pole, the top of position indication pole extends to the inboard of window through the fastening screw fixedly connected with lower output shaft, the bottom of lower output shaft passes the actuator output seat and extends to the bottom of actuator output seat.

Preferably, an output shaft sleeve is arranged on the inner side of the connecting part of the actuator main body and the actuator output seat, and the output shaft sleeve is sleeved on the outer side of the lower output shaft.

Preferably, a plane pressure bearing B is arranged at a contact position between the bottom surface of the upper linkage shaft and the actuator main body, and a plane pressure bearing a is arranged between the output end surface of the lower output shaft and the inner side surface of the actuator output seat.

Preferably, the inner surface of the actuator body is further provided with an actuator liner, and the actuator liner is located outside the piston and the spring.

Preferably, a piston sealing ring is arranged on the skirt edge of the bottom end of the piston in a clamping manner, and the piston sealing ring is attached to the lining of the actuator.

Preferably, the upper air inlet hole and the lower air inlet hole are respectively positioned at the upper side and the lower side of the skirt edge at the bottom end of the piston.

Compared with the prior art, the invention has the beneficial effects that: according to the invention, the force-to-direction conversion type pneumatic actuator can push the piston to do longitudinal reciprocating motion in a limited space through compressed air in the air pressure cylinder, and the piston displacement generated by the longitudinal motion enables the rectangular threads on the inner side of the piston and the rectangular threads on the outer side of the upper linkage shaft to generate moment so as to drive the upper linkage shaft to become transverse force through longitudinal force and output; and the whole structure is more compact, and the installation is convenient.

Drawings

Fig. 1 is a schematic perspective view of the present invention.

Fig. 2 is a schematic cross-sectional view of the present invention.

Fig. 3 is a schematic bottom view of the present invention.

1. An actuator body; 2. an actuator upper cover; 3. a window; 4. an upper air inlet hole; 5. a lower air inlet hole; 6. an actuator output seat; 7. a piston positioning sleeve; 8. a spring; 9. a position indication lever; 10. an upper piston fastening screw; 11. an upper linkage shaft; 12. a piston; 13. a linkage shaft fastening screw; 14. an output shaft sleeve; 15. a lower output shaft; 16. a planar pressure bearing A; 17. an actuator liner; 18. and a planar pressure bearing B.

Detailed Description

The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention. Referring to fig. 1 to 3, the present invention provides a technical solution: the force direction conversion type pneumatic actuator comprises an actuator main body 1, wherein an actuator upper cover 2 is rotatably arranged at the top of the actuator main body 1, a window 3 is arranged at the top of the actuator upper cover 2, the bottom end of the actuator main body 1 is fixedly connected with an actuator output seat 6 through a plurality of fastening bolts, an upper air inlet hole 4 and a lower air inlet hole 5 are arranged on the outer side surface of the actuator main body 1, a piston positioning sleeve 7 is fixedly arranged at the upper end of the interior of the actuator main body 1 and used for limiting a piston 12, a piston 12 is longitudinally arranged on the inner side of the piston positioning sleeve 7 in a sliding manner, a spring 8 is sleeved on the outer side of the piston positioning sleeve 7, the bottom end of the spring 8 extends to the skirt position of the bottom end of the piston 12, and an upper linkage shaft 11 is arranged on the inner side of the piston 12 through rectangular threaded fit; the top end of the piston 12 is connected with an upper piston fastening screw 10 through screw thread screwing, the top end of the upper piston fastening screw 10 is provided with a position indication rod 9, the top end of the position indication rod 9 extends to the inner side of the window 3, the bottom end of the upper linkage shaft 11 is fixedly connected with a lower output shaft 15 through a linkage shaft fastening screw 13, and the bottom end of the lower output shaft 15 passes through the actuator output seat 6 and extends to the bottom end of the actuator output seat 6; when the piston 12 performs longitudinal displacement (up-down movement), the inner rectangular screw thread of the piston 12 and the outer rectangular screw thread of the upper linkage shaft 11 generate moment due to the up-down displacement of the piston 12, and the moment can pull the upper linkage shaft 11 to generate transverse force for rotating movement, wherein the movement angle is 0-90 degrees; the upper linkage shaft 11 and the lower output shaft 15 are fixedly connected by a linkage shaft fastening screw 13, the upper linkage shaft 11 performs rotary motion, and the lower output shaft 15 performs rotary motion together under traction, so that torque is output.

In this embodiment, preferably, the output shaft sleeve 14 is mounted on the inner side of the connection portion between the actuator body 1 and the actuator output seat 6, and the output shaft sleeve 14 is sleeved on the outer side of the lower output shaft 15, so as to stabilize rotation and reduce friction force.

In the present embodiment, preferably, a planar pressure bearing B18 is provided at a contact position of the bottom surface of the upper coupling shaft 11 with the actuator body 1, and a planar pressure bearing a16 is provided between the output end surface of the lower output shaft 15 and the inner side surface of the actuator output seat 6; friction is generated to avoid rotation.

In this embodiment, preferably, the inner surface of the actuator body 1 is further provided with an actuator liner 17, and the actuator liner 17 is located outside the piston 12 and the spring 8; in this embodiment, preferably, a piston sealing ring is provided on the bottom skirt of the piston 12 in a clamping manner, and the piston sealing ring is attached to the actuator liner 17, so as to ensure tightness for the cooperation with the piston 12.

In this embodiment, the upper air intake hole 4 and the lower air intake hole 5 are preferably located at the upper and lower sides of the bottom skirt of the piston 12, respectively, so as to facilitate control of the longitudinal lifting movement of the piston 12.

Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made therein without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.

Claims

1. The force is to conversion formula pneumatic actuator, including executor main part (1), its characterized in that: the top of the actuator main body (1) is rotatably provided with an actuator upper cover (2), the top of the actuator upper cover (2) is provided with a window (3), the bottom of the actuator main body (1) is fixedly connected with an actuator output seat (6) through a plurality of fastening bolts, the outer side surface of the actuator main body (1) is provided with an upper air inlet hole (4) and a lower air inlet hole (5), the upper end of the inside of the actuator main body (1) is fixedly provided with a piston positioning sleeve (7), the inner side of the piston positioning sleeve (7) is longitudinally provided with a piston (12) in a sliding manner, the outer side of the piston positioning sleeve (7) is sleeved with a spring (8), the bottom end of the spring (8) extends to the bottom end skirt position of the piston (12), the inner side of the piston (12) is provided with an upper coupling shaft (11) through rectangular threaded fit, the top end of the piston (12) is connected with an upper piston fastening screw (10) through threaded engagement, the top end of the upper piston fastening screw (10) is provided with a position indicating rod (9), the inner side of the position indicating rod (9) is longitudinally provided with a piston (12), the outer side of the piston positioning sleeve (7) is fixedly connected with the bottom end of the window (12) through the window (13), the bottom end of the lower output shaft (15) penetrates through the actuator output seat (6) and extends to the bottom end of the actuator output seat (6).

2. The force-to-translation pneumatic actuator of claim 1, wherein: an output shaft sleeve (14) is arranged on the inner side of the joint of the actuator main body (1) and the actuator output seat (6), and the output shaft sleeve (14) is sleeved on the outer side of the lower output shaft (15).

3. The force-to-translation pneumatic actuator of claim 1, wherein: a plane pressure bearing B (18) is arranged at the contact position of the bottom surface of the upper linkage shaft (11) and the actuator main body (1), and a plane pressure bearing A (16) is arranged between the output end surface of the lower output shaft (15) and the inner side surface of the actuator output seat (6).

4. The force-to-translation pneumatic actuator of claim 1, wherein: the inner surface of the actuator body (1) is also provided with an actuator liner (17), and the actuator liner (17) is positioned outside the piston (12) and the spring (8).

5. The force-to-translation pneumatic actuator of claim 4, wherein: a piston sealing ring is arranged on the skirt edge of the bottom end of the piston (12) in a clamping manner, and the piston sealing ring is attached to an actuator lining (17).

6. The force-to-translating pneumatic actuator of claim 5 wherein: the upper air inlet hole (4) and the lower air inlet hole (5) are respectively positioned at the upper side and the lower side of the skirt edge at the bottom end of the piston (12).