An electric actuator

Abstract

The present invention provides a technical field of electric actuators, which belongs to an electric actuator. It solves the existing problem of needing to use a manual switching function when the power is off or under certain conditions. The electric actuator includes an upper shell and a lower shell, which are locked with each other to form a shell, a mounting plate is provided in the actuator body, a main shaft gear is provided at the lower end of the mounting plate, a support component is provided above the main shaft gear, three connecting members are provided at intervals at the upper end of the main shaft gear, a retaining bar is installed on the connecting member, a motor is provided in the shell, the motor is connected to the driving gear, a gear reduction device is provided in the lower shell and interconnected with the driving gear, a handle is provided outside the upper shell, the gear reduction device includes a first double gear, a second double gear and an output double gear, which are all double gears, and a spring assembly is provided at the lower end of the main shaft gear. The present invention has the advantages of simple structure, reasonable design and manual and automatic integration.

Description

Technical Field

[0001] The present invention belongs to the technical field of electric actuators, and in particular relates to an electric actuator. Background Art

[0002] Actuators are an essential component of automatic control systems. They receive control signals from the controller and change the volume of the controlled medium, thereby maintaining the controlled variable at a desired value or within a specified range. Actuators are typically used with valves to control fluid switching, but manual switching may be required in the event of a power outage or under certain conditions. Summary of the Invention

[0003] The purpose of the present invention is to address the above-mentioned problems existing in the prior art and to provide an electric actuator with a simple structure, reasonable design, and manual-automatic integration, and to quickly realize the manual-automatic switching function. As long as the handle is pressed down, it can be rotated to realize the manual function, and releasing the handle will rebound to the automatic mode.

[0004] The objectives of the present invention can be achieved through the following technical solutions: An electric actuator, characterized in that it includes an upper housing and a lower housing, the upper housing and the lower housing being locked together to form a housing, a mounting plate being provided in the actuator body, a main shaft gear being provided at the lower end of the mounting plate, a support component being provided above the main shaft gear, three connecting members for the support component to be engaged are provided at intervals on the upper end of the main shaft gear, a retaining bar being installed on the connecting member, a motor being provided in the housing, the motor being connected to a driving gear, a gear reduction device driven by the motor being provided in the lower housing and interconnected with the driving gear, a manually rotatable handle being provided on the outside of the upper housing, the gear reduction device including a first duplex gear, a second duplex gear, and an output duplex gear, all of which are duplex gears, a spring assembly being provided at the lower end of the main shaft gear for the main shaft gear to abut against, when the handle is pressed, the main shaft gear moves downward and disengages from the output duplex gear, realizing the manual function of the product, when the handle is released, the main shaft gear rebounds and engages with the output duplex gear, switching back to automatic mode.

[0005] In the above-mentioned electric actuator, the supporting component is composed of a middle cylinder and several clamping parts arranged on the side of the middle cylinder and corresponding to each connecting part. The fixing sleeve is provided with several grooves that fit with the clamping parts, and each of the clamping parts is provided with a protrusion for fixing the supporting component to the main shaft gear.

[0006] In the above-mentioned electric actuator, the large tooth surface of the first duplex gear is meshed with the driving gear, the small tooth surface of the first duplex gear is meshed with the large tooth surface of the second duplex gear, the small tooth surface of the second duplex gear is meshed with the large tooth surface of the output duplex gear, and the small tooth surface of the output duplex gear is meshed with the main shaft gear.

[0007] In the above electric actuator, the upper housing and the lower housing are snap-fitted together via a mounting plate.

[0008] In the above-mentioned electric actuator, an indicating groove is provided on the handle, and a flow indicator is installed on the upper shell at the lower end relative to the handle.

[0009] In the above electric actuator, a connecting piece is symmetrically extended outward from the peripheral wall of the bottom of the motor, and the connecting piece is connected to the mounting plate by a fixing bolt.

[0010] Compared with the existing technology, this electric actuator has an ingenious and reasonable structure, is easy to assemble, and has a very high adjustment accuracy. It has both automatic and manual actuators and is suitable for almost all process controls. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 It is an exploded view of the present invention.

[0012] Figure 2 It is a schematic cross-sectional structural diagram of the present invention.

[0013] Figure 3 It is a structural schematic diagram of the supporting component in the present invention.

[0014] Figure 4 It is a structural schematic diagram of the fixing sleeve in the present invention.

[0015] In the figure, 1. upper shell; 2. lower shell; 3. mounting plate; 4. main shaft gear; 5. motor; 6. driving gear; 7. supporting component; 8. first duplex gear; 9. second duplex gear; 10. output duplex gear; 11. handle; 12. flow indicator; 13. connecting part; 14. spring assembly; 15. middle cylinder; 16. fixing sleeve; 17. groove; 18. protrusion; 19. clamping part; 20. baffle. DETAILED DESCRIPTION

[0016] The following are specific embodiments of the present invention and the accompanying drawings to further describe the technical solutions of the present invention, but the present invention is not limited to these embodiments.

[0017] like Figure 1 、 Figure 2 、 Figure 3 、 Figure 4As shown, an electric actuator comprises an upper shell 1 and a lower shell 2, the upper shell 1 and the lower shell 2 are locked together to form a shell, a mounting plate 3 is provided in the actuator body, a main shaft gear 4 is provided at the lower end of the mounting plate 3, a support component 7 is provided above the main shaft gear 4, three connectors 13 for the support component 7 to be snapped into are provided at intervals on the upper end of the main shaft gear 4, a baffle 20 is installed on the connector 13, a motor 5 is provided in the shell, the motor 5 is connected to the driving gear 6, and the lower shell 2 is provided with a main shaft gear 6. A gear reduction device driven by the motor 5 is connected. A manually rotatable handle 11 is provided on the outside of the upper housing 1. The gear reduction device includes a first duplex gear 8, a second duplex gear 9, and an output duplex gear 10, all of which are duplex gears. The lower end of the main shaft gear 4 is provided with a spring assembly 14 for the main shaft gear 4 to abut against. When the handle 11 is pressed, the main shaft gear 4 moves downward and disengages from the output duplex gear 10, realizing the manual function of the product. When the handle 11 is released, the main shaft gear 4 rebounds and combines with the output duplex gear 10, returning to the automatic mode. This means that the actuator has both automatic and manual actuators, which is suitable for almost all process controls and can quickly realize the manual-automatic switching function. As long as the handle 11 is pressed down, it can be rotated to realize the manual function, and releasing the handle 11 will rebound to the automatic mode, meeting the user's usage needs during use.

[0018] To further elaborate, to enable support component 7 to better control the actuator, it consists of a central cylindrical member 15 and several engaging portions 19 disposed on the sides of central cylindrical member 15 and corresponding to each connecting member 13. The fixing sleeve 16 is provided with several grooves 17 that mate with the engaging portions 19. Each engaging portion 19 is provided with a raised portion 18 for securing support component 7 to main shaft gear 4. The fixing sleeve 16 is disposed on the exterior of connecting member 13. Pressing handle 11 causes engaging portion 19 to engage the lower end of retaining bar 20 in connecting member 13, securing main shaft gear 4 and disengaging it from the duplex gear. This actuator operates in manual mode. When handle 11 is released, spring assembly 14 causes main shaft gear 4 to rebound and engage with the duplex gear, shifting the actuator into automatic mode.

[0019] To be more specific, the large tooth surface of the first duplex gear 8 is meshed with the driving gear 6, the small tooth surface of the first duplex gear 8 is meshed with the large tooth surface of the second duplex gear 9, the small tooth surface of the second duplex gear 9 is meshed with the large tooth surface of the output duplex gear 10, and the small tooth surface of the output duplex gear 10 is meshed with the main shaft gear 4.

[0020] To be more specific, the upper shell 1 and the lower shell 2 are snap-fitted together via the mounting plate 3 .

[0021] Preferably, an indicator groove is provided on the handle 11, and a flow indicator plate 12 is installed on the upper housing 1 at the lower end relative to the handle 11. The flow indicator plate 12 and the indicator groove can accurately display the flow controlled by the actuator.

[0022] Preferably, a connecting piece 13 is symmetrically extended outward from the peripheral wall of the bottom of the motor 5, and the connecting piece 13 is connected to the mounting plate 3 by a fixing bolt.

[0023] The specific embodiments described herein are merely illustrative of the spirit of the present invention. Persons skilled in the art may make various modifications, additions, or substitutions to the described specific embodiments without departing from the spirit of the present invention or exceeding the scope of the appended claims.

Claims

1. An electric actuator, characterized in that: The actuator comprises an upper shell (1), a lower shell (2) and a fixing sleeve (16), wherein the upper shell (1) and the lower shell (2) are locked with each other to form a shell, a mounting plate (3) is provided in the actuator body, a main shaft gear (4) is provided at the lower end of the mounting plate (3), a supporting component (7) is provided above the main shaft gear (4), three connecting members (13) for the supporting member (7) to be clamped are provided at intervals on the upper end of the main shaft gear (4), the supporting member (7) is composed of a middle cylinder (15) and a plurality of clamping portions (19) provided on the side of the middle cylinder (15) and corresponding to each connecting member (13), the fixing sleeve (16) is provided with a plurality of grooves (17) that fit with the clamping portions (19), and each clamping portion (19) is provided with a protrusion (18) for fixing the supporting member (7) to the main shaft gear (4), and the connecting member (13) is provided with a stop bar (20), a motor (5) is provided in the housing, the motor (5) is connected to a driving gear (6), a gear reduction device driven by the motor (5) is provided in the lower housing (2) and is connected to the driving gear (6), and a handle (11) that can be rotated manually is provided on the outside of the upper housing (1), the gear reduction device includes a first double gear (8), a second double gear (9) and an output double gear (10), all of which are double gears, and a spring assembly (14) for the main shaft gear (4) to abut against is provided at the lower end of the main shaft gear (4), when the handle (11) is pressed, the main shaft gear (4) moves downward and is disengaged from the output double gear (10), realizing the manual function of the product, and when the handle (11) is released, the main shaft gear (4) rebounds and is combined with the output double gear (10), turning back to the automatic mode.

2. An electric actuator according to claim 1, characterized in that: The large tooth surface of the first duplex gear (8) meshes with the driving gear (6), the small tooth surface of the first duplex gear (8) meshes with the large tooth surface of the second duplex gear (9), the small tooth surface of the second duplex gear (9) meshes with the large tooth surface of the output duplex gear (10), and the small tooth surface of the output duplex gear (10) meshes with the main shaft gear (4).

3. The electric actuator according to claim 1, characterized in that: The upper shell (1) and the lower shell (2) are snap-fitted together via the mounting plate (3).

4. The electric actuator according to claim 1, characterized in that: The handle (11) is provided with an indication groove, and a flow indicator plate (12) is installed on the upper shell (1) at a lower end relative to the handle (11).

5. The electric actuator according to claim 1, characterized in that: A connecting piece (13) is symmetrically extended outward from the peripheral wall of the bottom of the motor (5), and the connecting piece (13) is connected to the mounting plate (3) via fixing bolts.

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