Spring self-resetting electric actuator

Abstract

The utility model discloses a spring self-resetting electric actuator, which belongs to the technical field of electric actuators and comprises an electric actuator body, a valve is mounted on the bottom wall of the electric actuator body, and a self-resetting structure is arranged on the electric actuator body. The self-resetting structure comprises an electromagnet magnetically connected to a connecting rod at the bottom of the electric actuator body, a rotating rod is installed on the bottom wall of the electromagnet, the outer wall of the rotating rod is rotationally connected with the inner wall of the valve in a penetrating mode, a connecting block is installed on the outer wall of the rotating rod, and a valve element is installed on the outer wall of the connecting block. By arranging the self-resetting structure, the electric actuator body is started to drive the electromagnet to rotate, the electromagnet drives the valve element to open the valve, the volute spiral spring is driven to contract inwards while rotating, when power is cut off, the electromagnet and the electric actuator body lose the magnetic connection effect, and the volute spiral spring rebounds through the elastic force of the volute spiral spring; the rotating rod drives the valve element to rotate reversely to close the valve.

Description

Technical Field

[0001] The utility model belongs to the technical field of electric actuators, and specifically relates to a spring self-resetting electric actuator. Background Technique

[0002] An electric actuator is a device that can convert electrical energy into mechanical motion, and realizes the adjustment of the position, speed or force of a controlled object through the drive of a motor. It mainly consists of a motor, a transmission mechanism, a control circuit and a housing, etc. The structure is complex and diverse. According to different application requirements, it can be divided into two types: linear and rotary. The working principle of an electric actuator is to decompose the self-rotation motion of a rotary motor into linear power so that a valve, etc. can be opened or closed along with a guide rod;

[0003] The spring self-resetting device is generally arranged inside the electric actuator. When the power supply is interrupted or a fault occurs, it can be restored to its original position through the spring self-resetting device. However, the spring reset device installed inside the electric actuator may affect other parts of the actuator when the spring has problems, resulting in a failure of the entire system;

[0004] To solve the above problems, a spring self-resetting electric actuator is proposed in this application. Content of the Utility Model

[0005] In view of the problems in the related art, the utility model proposes a spring self-resetting electric actuator to overcome the above technical problems existing in the existing related art.

[0006] To achieve the above purpose, the utility model adopts the following technical solutions:

[0007] A spring self-resetting electric actuator includes an electric actuator body, a valve is installed on the bottom wall of the electric actuator body, and a self-resetting structure is arranged on the electric actuator body;

[0008] The self-resetting structure includes an electromagnet magnetically connected to a connecting rod at the bottom of the electric actuator body. A rotating rod is installed on the bottom wall of the electromagnet. The outer wall of the rotating rod is rotatably connected through the inner wall of the valve. A connecting block is installed on the outer wall of the rotating rod. A valve core is installed on the outer wall of the connecting block. The outer wall of the valve core is clamped with the inner wall of the valve. A communicating column is connected to the bottom of the valve. The outer wall of the rotating rod is rotatably connected through the inner wall of the communicating column. A hollow block is installed on the bottom wall of the communicating column. A fixing column is installed on the inner bottom wall of the hollow block. A scroll spring is clamped on the outer wall of the fixing column. One end of the scroll spring away from the fixing column is clamped with a clamping block. The top wall of the clamping block is fixedly connected to the bottom wall of the rotating rod.

[0009] The bottom wall of the scroll spring is movably connected to the inner bottom wall of the hollow block. The bottom wall of the clamping block is not in contact with the inner bottom wall of the hollow block. By arranging the scroll spring to be movably connected to the hollow block, it is convenient for the scroll spring to contract.

[0010] A cover plate is installed on the top of the hollow block. The top wall of the cover plate is movably connected to the bottom wall of the rotating rod. The outer wall of the clamping block is rotatably connected to the inner wall of the cover plate. By arranging the cover plate, it can play a role in limiting the scroll spring.

[0011] An outer shell is installed on the outer wall of the electromagnet. The inner wall of the outer shell is fixedly connected to the outer wall of the rotating rod. By arranging the outer shell, it is used for the protection effect of the electromagnet.

[0012] A circular ring block is installed on one side of the electromagnet adjacent to the electric actuator body. The bottom wall of the circular ring block is rotatably connected to the top wall of the electromagnet. By arranging the circular ring block, it strengthens the protection effect on the electromagnet.

[0013] A cylinder is installed on the top wall of the electromagnet. The outer wall of the cylinder is rotatably connected to the inner wall of the electric actuator body. By arranging the cylinder, it strengthens the effect of the rotation of the rotating rod.

[0014] In summary, the technical effects and advantages of the present utility model: This spring self-resetting electric actuator,

[0015] 1. By arranging a self-resetting structure, starting the electric actuator body drives the electromagnet to rotate. The electromagnet drives the valve core to open the valve. While rotating, it drives the scroll spring to contract inward. When powered off, the magnetic connection effect between the electromagnet and the electric actuator body is lost. The scroll spring uses its own elastic force to rebound and drives the valve core to rotate in the reverse direction through the rotating rod to close the valve.

[0016] 2. By arranging the outer shell and the cylinder, when the electromagnet is separated from the electric actuator body, the cylinder arranged increases the connection effect between the electromagnet and the electric actuator body to improve the stability during the rotation of the rotating rod, so as to further improve the rotation effect of the rotating rod. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 is a schematic diagram of the overall structure of the present utility model;

[0018] Figure 2 is a schematic cross-sectional view of the internal structure of the valve of the present utility model;

[0019] Figure 3 is a schematic diagram of the outer shell and cylinder structure of the present utility model;

[0020] Figure 4 is a schematic diagram of the scroll spring (spring piece) and hollow block structure of the present utility model.

[0021] In the figure:

[0022] 1. Electric actuator body; 2. Valve;

[0023] 3. Self-resetting structure; 301. Electromagnet; 302. Rotating rod; 303. Connecting block; 304. Valve core; 305. Connecting column; 306. Hollow block; 307. Fixed column; 308. Volute spring (spring piece); 309. Clamping block; 310. Cover plate;

[0024] 4. Outer shell; 5. Ring block; 6. Cylinder. Specific implementation mode

[0025] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments.

[0026] Refer to Figures 1-4 , a spring self-resetting electric actuator, including an electric actuator body 1, a valve 2 is installed on the bottom wall of the electric actuator body 1, a self-resetting structure 3 is arranged on the electric actuator body 1, the self-resetting structure 3 includes an electromagnet 301 magnetically connected to the bottom connecting rod of the electric actuator body 1, the model of the electromagnet 301 is GLX-P25, after the electromagnet 301 is powered on, it is magnetically connected to the electric actuator body 1, when the power is off, the electromagnet 301 is no longer connected to the electric actuator body 1, the bottom wall of the electromagnet 301 is fixedly installed with a rotating rod 302, the outer wall of the rotating rod 302 is rotatably connected through the inner wall of the valve 2, a connecting block 303 is installed on the outer wall of the rotating rod 302, a valve core 304 is installed on the outer wall of the connecting block 303, the number of the connecting blocks 303 is three, and the valve core 304 is equidistantly distributed at the position of the rotating rod 302 inside the valve 2.

[0027] The outer wall of the valve core 304 is clamped with the inner wall of the valve 2, a connecting column 305 is communicated with the bottom of the valve 2, the outer wall of the rotating rod 302 is rotatably connected through the inner wall of the connecting column 305, starting the electric actuator body 1 drives the electromagnet 301 and the rotating rod 302 to rotate, and the rotating rod 302 drives the valve core 304 to rotate for the effect of opening and closing the valve 2.

[0028] A hollow block 306 is installed on the bottom wall of the connecting column 305, the outer wall of the hollow block 306 is connected to the inner wall of 305, a fixed column 307 is installed on the inner bottom wall of the hollow block 306, a volute spring 308 is clamped on the outer wall of the fixed column 307, the volute spring 308 can also be a spring piece, the fixed column 307 is located at the corner position of the inner bottom wall of the hollow block 306, one end of the volute spring 308 is clamped with the fixed column 307, and the other end is located at the center position of the hollow block 306.

[0029] One end of the scroll spring 308 away from the fixed column 307 is clamped with a clamping block 309. The top wall of the clamping block 309 is fixedly connected to the bottom wall of the rotating rod 302. The rotation of the rotating rod 302 drives the clamping block 309 to rotate, and the rotation of the clamping block 309 drives the scroll spring 308 to contract inward.

[0030] The bottom wall of the scroll spring 308 is movably connected to the inner bottom wall of the hollow block 306, and the bottom wall of the clamping block 309 is not in contact with the inner bottom wall of the hollow block 306, effectively preventing the scroll spring 308 from being affected by the hollow block 306 when rotating and contracting.

[0031] A cover plate 310 is installed on the top of the hollow block 306. The top wall of the cover plate 310 is movably connected to the bottom wall of the rotating rod 302, and the outer wall of the clamping block 309 is rotatably connected to the inner wall of the cover plate 310. The provided cover plate 310 is used to limit the scroll spring 308 to a certain extent, effectively preventing the scroll spring 308 from detaching from the hollow block 306.

[0032] Refer to Figure 3 An outer shell 4 is installed on the outer wall of the electromagnet 301. The inner wall of the outer shell 4 is fixedly connected to the outer wall of the rotating rod 302. A plurality of ventilation notches are provided on the outer shell 4. The provided outer shell 4 is used to protect the electromagnet 301 to a certain extent.

[0033] A circular ring block 5 is installed on one side of the electric actuator body 1 adjacent to the electromagnet 301. The bottom wall of the circular ring block 5 is rotatably connected to the top wall of the electromagnet 301. The circular ring block 5 is made of rubber material, further strengthening the protection effect on the electromagnet 301 and increasing the connection effect between the electric actuator body 1 and the electromagnet 301.

[0034] A cylinder 6 is installed on the top wall of the electromagnet 301. The outer wall of the cylinder 6 is rotatably connected to the inner wall of the electric actuator body 1. The provided cylinder 6 increases the connection effect between the electromagnet 301 and the electric actuator body 1 and improves the rotation effect of the rotating rod 302.

[0035] Working principle:

[0036] Start the electric actuator body 1 to drive the electromagnet 301 to rotate. The electromagnet 301 drives the rotating rod 302 to rotate. The rotating rod 302 drives the connecting block 303 and the valve core 304 to rotate to open the valve 2. At the same time of rotation, it drives the clamping block 309 to rotate. When the clamping block 309 rotates, it drives the scroll spring 308 to contract inward. When powered off, the magnetic connection effect between the electromagnet 301 and the electric actuator body 1 is lost. At this time, when the electromagnet 301 detaches from the electric actuator body 1, the scroll spring 308 is no longer stressed and uses its own elastic force to rebound, driving the valve core 304 to rotate in the reverse direction through the rotating rod 302 to close the valve 2.

[0037] When the electromagnet 301 is disengaged from the electric actuator body 1, the cylindrical member 6 provided is used to continue the rotational connection with the electric actuator body 1, so as to increase the connection effect between the electromagnet 301 and the electric actuator body 1 to improve the stability when the rotating rod 302 rotates, and further improve the rotation effect of the rotating rod 302.

[0038] The above are only the preferred embodiments of the present invention, and are not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims

1. A spring self-resetting electric actuator, comprising an electric actuator body (1), characterized in that, A valve (2) is installed on the bottom wall of the electric actuator body (1), and a self-resetting structure (3) is provided on the electric actuator body (1); The self-resetting structure (3) includes an electromagnet (301) magnetically connected to the bottom link of the electric actuator body (1). A rotating rod (302) is installed on the bottom wall of the electromagnet (301). The outer wall of the rotating rod (302) is rotatably connected through the inner wall of the valve (2). A connecting block (303) is installed on the outer wall of the rotating rod (302). A valve core (304) is installed on the outer wall of the connecting block (303). The outer wall of the valve core (304) is clamped with the inner wall of the valve (2). A communicating column (305) is connected to the bottom of the valve (2). The outer wall of the rotating rod (302) is rotatably connected through the inner wall of the communicating column (305). A hollow block (306) is installed on the bottom wall of the communicating column (305). A fixing column (307) is installed on the inner bottom wall of the hollow block (306). A elastic piece (308) is clamped on the outer wall of the fixing column (307). One end of the elastic piece (308) away from the fixing column (307) is clamped with a clamping block (309). The top wall of the clamping block (309) is fixedly connected to the bottom wall of the rotating rod (302).

2. The spring self-resetting electric actuator according to claim 1, characterized in that, The bottom wall of the elastic piece (308) is movably connected to the inner bottom wall of the hollow block (306), and the bottom wall of the clamping block (309) is not in contact with the inner bottom wall of the hollow block (306).

3. The spring self-resetting electric actuator according to claim 1, characterized in that, A cover plate (310) is installed on the top of the hollow block (306). The top wall of the cover plate (310) is movably connected to the bottom wall of the rotating rod (302). The outer wall of the clamping block (309) is rotatably connected to the inner wall of the cover plate (310).

4. A spring self-resetting electric actuator according to claim 1, characterized in that, A housing (4) is installed on the outer wall of the electromagnet (301). The inner wall of the housing (4) is fixedly connected to the outer wall of the rotating rod (302).

5. A spring self-resetting electric actuator according to claim 1, characterized in that, A circular ring block (5) is installed on one side of the electric actuator body (1) adjacent to the electromagnet (301). The bottom wall of the circular ring block (5) is rotatably connected to the top wall of the electromagnet (301).

6. The spring self-resetting electric actuator according to claim 1, characterized in that, A cylinder (6) is installed on the top wall of the electromagnet (301). The outer wall of the cylinder (6) is rotatably connected to the inner wall of the electric actuator body (1).

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