CN113833893A

CN113833893A - Electric actuator

Info

Publication number: CN113833893A
Application number: CN202111306203.XA
Authority: CN
Inventors: 张星星
Original assignee: Zhejiang Daher Actuator Manufacturing Co ltd
Current assignee: Zhejiang Daher Actuator Manufacturing Co ltd
Priority date: 2021-11-05
Filing date: 2021-11-05
Publication date: 2021-12-24

Abstract

The invention provides the technical field of electric actuators, and belongs to an electric actuator. The problem that manual switching functions need to be used in the prior art under power failure or certain conditions is solved. The electric actuator comprises an upper shell and a lower shell, wherein the upper shell and the lower shell are mutually locked to tightly form the shell, a mounting plate is arranged in an actuator main body, a main shaft gear is arranged at the lower end of the mounting plate, a supporting part is arranged above the main shaft gear, three connecting pieces are arranged at intervals at the upper end of the main shaft gear, a barrier strip is installed on each connecting piece, a motor is arranged in the shell and connected with a driving gear, a gear reduction device is arranged in the lower shell and mutually connected with the driving gear, a handle is arranged outside the upper shell, the gear reduction device comprises a first duplicate gear, a second duplicate gear and an output duplicate gear, the first duplicate gear, the second duplicate gear and the output duplicate gear are both duplicate gears, and a spring assembly is arranged at the lower end of the main shaft gear. The invention has the advantages of simple structure, reasonable design and manual-automatic integration.

Description

Electric actuator

Technical Field

The invention belongs to the technical field of electric actuators, and particularly relates to an electric actuator.

Background

The actuator is an essential important component of an automatic control system. It is used to receive the control signal from the controller and change the size of the controlled medium to maintain the controlled variable at the required value or in certain range. Actuators are commonly used with valves and for controlling fluid switches, but require the use of a manual switching function in the event of a power failure or under certain conditions.

Disclosure of Invention

The invention aims to solve the problems in the prior art, and provides a manual-automatic integrated electric actuator which is simple in structure, reasonable in design and capable of quickly realizing manual and automatic switching functions.

The purpose of the invention can be realized by the following technical scheme: an electric actuator is characterized by comprising an upper shell and a lower shell, wherein the upper shell and the lower shell are locked with each other to form a shell, a mounting plate is arranged in an actuator body, a spindle gear is arranged at the lower end of the mounting plate, a supporting part is arranged above the spindle gear, three connecting pieces for clamping the supporting part are arranged at the upper end of the spindle gear at intervals, barrier strips are arranged on the connecting pieces, a motor is arranged in the shell and connected with a driving gear, a gear speed reducer driven by the motor is connected in the lower shell and connected with the driving gear, a handle capable of rotating manually is arranged outside the upper shell, the gear speed reducer comprises a first duplicate gear, a second duplicate gear and an output duplicate gear which are duplicate gears, the lower end of the spindle gear is provided with a spring assembly for supporting the spindle gear against the spring assembly, when the handle is pressed, the main shaft gear moves downwards and is separated from the output duplicate gear, the manual function of a product is realized, and after the handle is released, the main shaft gear rebounds and is combined with the output duplicate gear to rotate back to the automatic mode.

In the above electric actuator, the supporting member is composed of a middle cylinder and a plurality of clamping parts arranged on the side edge of the middle cylinder and corresponding to the connecting pieces, the fixing sleeve is provided with a plurality of grooves matched with the clamping parts, and each clamping part is convexly provided with a protruding part for fixing the supporting member and the main shaft gear.

In the electric actuator, a large tooth surface of the first duplicate gear is engaged with the driving gear, a small tooth surface of the first duplicate gear is engaged with a large tooth surface of the second duplicate gear, a small tooth surface of the second duplicate gear is engaged with a large tooth surface of the output duplicate gear, and a small tooth surface of the output duplicate gear is engaged with the main shaft gear.

In the electric actuator, the upper shell and the lower shell are in clamping fit through the mounting plate.

In the electric actuator, the handle is provided with an indicating groove, and the upper shell is provided with a flow indicator relative to the lower end of the handle.

In the above electric actuator, the peripheral wall of the bottom of the motor symmetrically extends outwards to form the connecting pieces, and the connecting pieces are connected with the mounting plate through the fixing bolts.

Compared with the prior art, the electric actuator has the advantages of ingenious and reasonable structure, easy assembly, quite high adjustment precision, automatic and manual actuating mechanisms, and almost suitability for all process control.

Drawings

Fig. 1 is an exploded view of the present invention.

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

Fig. 3 is a schematic structural view of the support member of the present invention.

Fig. 4 is a schematic view of the structure of the pouch according to the present invention.

In the figure, 1, an upper shell; 2. a lower housing; 3. mounting a plate; 4. a main shaft gear; 5.

a motor; 6. a driving gear; 7. a support member; 8. a first duplicate gear; 9. a second duplicate gear; 10. an output duplicate gear; 11. a handle 12, a flow indicator; 13. a connecting member; 14. a spring assembly; 15. a middle cylinder part; 16. fixing a sleeve; 17. a groove; 18. a boss portion; 19. a clamping part; 20. and (6) blocking strips.

Detailed Description

The following are specific embodiments of the present invention and are further described with reference to the drawings, but the present invention is not limited to these embodiments.

As shown in fig. 1, fig. 2, fig. 3 and fig. 4, an electric actuator comprises an upper shell 1 and a lower shell 2, the upper shell 1 and the lower shell 2 are locked with each other to form a shell, a mounting plate 3 is arranged in an actuator main body, a spindle gear 4 is arranged at the lower end of the mounting plate 3, a supporting part 7 is arranged above the spindle gear 4, three connecting pieces 13 for clamping the supporting part 7 are arranged at the upper end of the spindle gear 4 at intervals, a blocking strip 20 is arranged on the connecting pieces 13, a motor 5 is arranged in the shell, the motor 5 is connected with a driving gear 6, a gear reduction device driven by the motor 5 is arranged in the lower shell 2 and is connected with the driving gear 6, a handle 11 capable of being rotated manually is arranged outside the upper shell 1, and the gear reduction device comprises a first duplicate gear 8, a second duplicate gear, a third duplicate gear, a fourth gear and a fourth gear, The manual operation mode of the product is realized by arranging a spring assembly 14 for the main shaft gear 4 to abut against at the lower end of the main shaft gear 4, pressing a handle 11 to enable the main shaft gear 4 to move downwards and to be separated from the output duplicate gear 10, and after releasing the handle 11, the main shaft gear 4 rebounds and is combined with the output duplicate gear 10 to rotate back to the automatic mode. The actuator is provided with automatic and manual actuating mechanisms, is almost suitable for all process control, can quickly realize manual and automatic switching functions, can rotate to realize manual functions by pressing the handle 11 downwards, can rebound to an automatic mode by releasing the handle 11, and meets the use requirements of users in the use process.

To put it more concretely, in order to make the supporting component 7 better control the actuator, in the above electric actuator, the supporting component 7 is composed of a middle cylinder 15 and a plurality of clamping portions 19 which are arranged at the side edge of the middle cylinder 15 and correspond to the connecting pieces 13, the fixing sleeve 16 is provided with a plurality of grooves 17 which are matched with the clamping portions 19, and each clamping portion 19 is convexly provided with a protruding portion 18 for fixing the supporting component 7 and the main shaft gear 4. The fixing sleeve 16 is arranged outside the connecting piece 13, the handle 11 is pressed, the clamping part 19 is clamped with the lower end of the barrier strip 20 in the connecting piece 13, the main shaft gear 4 is fixed and separated from the duplicate gear, the actuator is a manual function, when the handle 11 is released, the main shaft gear 4 is rebounded through the spring assembly 14 and is combined with the duplicate gear, and the actuator is in an automatic mode.

In more detail, the large tooth surface of the first duplicate gear 8 is meshed with the driving gear 6, the small tooth surface of the first duplicate gear 8 is meshed with the large tooth surface of the second duplicate gear 9, the small tooth surface of the second duplicate gear 9 is meshed with the large tooth surface of the output duplicate gear 10, and the small tooth surface of the output duplicate gear 10 is meshed with the main shaft gear 4.

In further detail, the upper shell 1 and the lower shell 2 are in clamping fit through the mounting plate 3.

Preferably, the handle 11 is provided with an indication groove 17, and the upper case 1 is provided with a flow indicator 12 at a lower end thereof opposite to the handle 11. The flow indicator 12 and the indicating groove 17 can accurately display the flow controlled by the actuator.

Preferably, the peripheral wall of the bottom of the motor 5 is symmetrically extended with a connecting piece 13, and the connecting piece 13 is connected with the mounting plate 3 through a fixing bolt.

The specific embodiments described herein are merely illustrative of the spirit of the invention. Various modifications or additions may be made to the described embodiments or alternatives may be employed by those skilled in the art without departing from the spirit or ambit of the invention as defined in the appended claims.

Claims

1. The electric actuator is characterized by comprising an upper shell (1) and a lower shell (2), wherein the upper shell (1) and the lower shell (2) are locked with each other to form a shell, a mounting plate (3) is arranged in an actuator body, a spindle gear (4) is arranged at the lower end of the mounting plate (3), a supporting part (7) is arranged above the spindle gear (4), three connecting pieces (13) for clamping the supporting part (7) are arranged at the upper end of the spindle gear (4) at intervals, a blocking strip (20) is arranged on the connecting pieces (13), a motor (5) is arranged in the shell, the motor (5) is connected with a driving gear (6), a gear speed reducing device driven by the motor (5) is connected in the lower shell (2) and is connected with the driving gear (6) mutually, a handle (11) capable of rotating manually is arranged outside the upper shell (1), the gear reduction unit comprises a first duplicate gear (8), a second duplicate gear (9) and an output duplicate gear (10) which are duplicate gears, wherein the lower end of the main shaft gear (4) is provided with a spring assembly (14) used for supporting the main shaft gear (4) to abut against, when the handle (11) is pressed, the main shaft gear (4) moves downwards and is separated from the output duplicate gear (10), the manual function of a product is realized, after the handle (11) is released, the main shaft gear (4) rebounds and is combined with the output duplicate gear (10), and the automatic mode is returned.

2. The electric actuator according to claim 1, wherein the support member (7) comprises a middle cylinder (15) and a plurality of clamping portions (19) arranged at the side of the middle cylinder (15) and corresponding to the connecting members (13), the fixing sleeve (16) is provided with a plurality of grooves (17) matched with the clamping portions (19), and each clamping portion (19) is convexly provided with a protruding portion (18) for fixing the support member (7) and the main shaft gear (4).

3. An electric actuator according to claim 1, characterized in that the large tooth flank of the first double gear (8) meshes with the drive gear (6), the small tooth flank of the first double gear (8) meshes with the large tooth flank of the second double gear (9), the small tooth flank of the second double gear (9) meshes with the large tooth flank of the output double gear (10), and the small tooth flank of the output double gear (10) meshes with the spindle gear (4).

4. An electric actuator according to claim 1, characterized in that the upper housing (1) and the lower housing (2) are snap-fitted by means of a mounting plate (3).

5. An electric actuator as claimed in claim 1, characterized in that the handle (11) is provided with an indicating recess (17), and the upper housing (1) is provided with a flow indicator (12) at a lower end thereof opposite to the handle (11).

6. The electric actuator according to claim 1, wherein the peripheral wall of the bottom of the motor (5) is extended outward symmetrically with a connecting piece (13), and the connecting piece (13) is connected with the mounting plate (3) through a fixing bolt.