Manual spanner for electric actuator and electric actuator

Abstract

This application provides a manual wrench and an electric actuator. The manual wrench includes a wrench body, a wrench handle, a permanent magnet, and an output circuit. An electromagnetic induction element is provided on the output circuit. The wrench body, the wrench handle, and the permanent magnet are fixed together to form an integral part. This integral part is movable relative to the housing of the electric actuator to move closer to or further away from the electromagnetic induction element. The output circuit can output a first control signal to control the motor of the electric actuator to de-energize in response to the proximity of the integral part, and output a second control signal to control the motor of the electric actuator to energize in response to the retraction of the integral part. Before manually operating the electric actuator, the power input from the motor to the driving part of the electric actuator can be cut off by moving the integral part of the manual wrench body. The operation is relatively simple and reliable.

Description

Technical Field

[0001] This application relates to the field of electric actuator technology, and in particular to a manual wrench and an electric actuator. Background Technology

[0002] Actuators are an essential component of automatic control systems. Their function is to receive control signals from the controller, change the magnitude of the controlled medium, and thus maintain the controlled variable at the required value or within a certain range. Actuators can be classified according to their power type into pneumatic actuators, hydraulic actuators, and electric actuators. Electric actuators use a motor as the power element and have a driving part that is driven by the motor and a driven part that is driven by the driving part.

[0003] In practical use, if an emergency occurs requiring manual operation, the electric actuator is equipped with a manual wrench. This wrench is used to manually drive the actuator's driving mechanism. Before performing manual operation, the power input from the motor to the driving mechanism must be cut off.

[0004] How to easily and reliably cut off the power input from the motor to the active part before manual operation is a technical problem that needs to be solved by those skilled in the art. Summary of the Invention

[0005] To solve the above-mentioned technical problems, this application provides a manual wrench for an electric actuator. The manual wrench includes a wrench body, a wrench handle, a permanent magnet, and an output circuit. The output circuit is provided with an electromagnetic induction element. The wrench body, the wrench handle, and the permanent magnet are fixed together to form an integral part. The integral part can move relative to the housing of the electric actuator to move closer to or further away from the electromagnetic induction element. The output circuit can output a first control signal to control the motor of the electric actuator to de-energize in response to the proximity of the integral part, and output a second control signal to control the motor of the electric actuator to energize in response to the distance of the integral part.

[0006] One embodiment of a manual wrench for an electric actuator includes a wrench handle with a plug for insertion into a socket on the housing of the electric actuator. The manual wrench includes a sealing ring fitted around the plug and used to seal the gap between the plug and the socket.

[0007] In one embodiment of the manual wrench of the electric actuator, the wrench handle has a stepped surface at the end of the plug away from the wrench body and an annular stop portion on the outer periphery of the plug, and the sealing ring is limited between the stepped surface and the annular stop portion.

[0008] One embodiment of a manual wrench for an electric actuator, wherein the wrench handle is of injection-molded structure.

[0009] One embodiment of a manual wrench for an electric actuator has a reinforcing rib inside the wrench handle.

[0010] One embodiment of a manual wrench for an electric actuator includes a wrench handle with a mounting hole, and one end of the permanent magnet and the wrench body located within the mounting hole.

[0011] One embodiment of a manual wrench for an electric actuator includes a first circuit board, an output circuit disposed on the first circuit board, and the first circuit board being located inside the housing of the electric actuator.

[0012] This application also provides an electric actuator, which includes the manual wrench described in any of the above claims, and further includes a motor, an active part that is driven and connected to the motor, and a driven part that is driven and connected to the active part. When operated manually, the end of the wrench body away from the wrench handle is driven and connected to the active part.

[0013] One embodiment of an electric actuator includes a drive circuit electrically connected to an output circuit, wherein the drive circuit is capable of powering off or on the motor according to a control signal output by the output circuit.

[0014] One embodiment of an electric actuator includes a second circuit board, the drive circuit being disposed on the second circuit board, and the second circuit board being located inside the housing of the electric actuator.

[0015] The manual wrench and electric actuator provided in this application allow for manual operation. Before manual operation, the entire manual wrench is moved closer to the electromagnetic induction element, causing the output circuit to output a first control signal to de-energize the electric actuator motor, thereby cutting off the power input from the motor to the actuator's driving part. Then, the entire manual wrench is rotated to manually drive the actuator's driving part. After manual operation, the entire manual wrench is moved away from the electromagnetic induction element, causing the output circuit to output a second control signal to energize the electric actuator motor, thereby restoring the power input from the motor to the actuator's driving part. It is evident that the power input from the motor to the actuator's driving part can be cut off and restored simply by moving the entire manual wrench, making operation relatively simple. Furthermore, because the permanent magnet is relatively stable, as long as the entire wrench (including the permanent magnet) is in position, the electric actuator motor can be de-energized or energized, making it relatively reliable. Attached Figure Description

[0016] Figure 1A perspective view of one embodiment of the manual wrench of the actuator provided in this application.

[0017] The annotations in the attached figures are explained as follows:

[0018] 1. Wrench body;

[0019] 2. Handle, 21. Grip, 22. Arm, 23. Extension, 24. Plug, 25. Stepped surface, 26. Stop, 27. Mounting hole;

[0020] 3 permanent magnets;

[0021] 4. First circuit board; 41. Electromagnetic induction element;

[0022] 5. Sealing rings. Detailed Implementation

[0023] This application provides a manual wrench with an electric actuator and an electric actuator. To enable those skilled in the art to better understand the technical solution of this application, the following detailed description is provided in conjunction with the accompanying drawings and specific embodiments.

[0024] like Figure 1 As shown, the manual wrench of the electric actuator provided in this application includes a wrench body 1, a wrench handle 2, a permanent magnet 3, and an output circuit. The output circuit is equipped with an electromagnetic induction element 41. Specifically, in the illustrated embodiment, the manual wrench includes a first circuit board 4, and the output circuit is disposed on the first circuit board 4 to reduce the number of scattered electrical components. Specifically, the permanent magnet 3 is preferably a strong magnetic magnet, such as a neodymium iron boron magnet, a samarium cobalt magnet, or an alnico magnet.

[0025] The wrench body 1, wrench handle 2, and permanent magnet 3 are fixed together to form an integral part. This integral part can move relative to the housing of the electric actuator to move closer to or further away from the electromagnetic induction element 41. The output circuit can respond to the proximity of the integral part by outputting a first control signal to control the motor of the electric actuator to de-energize, and the output circuit can also respond to the relocation of the integral part by outputting a second control signal to control the motor of the electric actuator to energize. Specifically, the permanent magnet 3 moving closer to the electromagnetic induction element 41 will cause the electromagnetic induction element 41 to generate an induced current, and the permanent magnet 3 moving away from the electromagnetic induction element 41 will cause the electromagnetic induction element 41 to generate an induced current in the opposite direction. The output circuit can output the first control signal and the second control signal according to the change in the induced current of the electromagnetic induction element 41.

[0026] When manual operation of the electric actuator is required, first move the entire manual wrench towards the electromagnetic induction element. This causes the output circuit to output a first control signal to de-energize the electric actuator motor, thus cutting off the power input from the motor to the actuator's driving part. Then, rotate the entire manual wrench to manually drive the actuator's driving part. After manual operation, move the entire manual wrench away from the electromagnetic induction element. This causes the output circuit to output a second control signal to energize the electric actuator motor, thus restoring the power input from the motor to the actuator's driving part. In other words, the power input from the motor to the actuator's driving part can be cut off and restored simply by moving the entire manual wrench, making operation relatively simple. Furthermore, because the permanent magnet 3 has relatively stable magnetism and its magnetism will not weaken even after long-term use, as long as the entire part (including the permanent magnet) is in position, the electric actuator motor can be de-energized or energized, making it quite reliable.

[0027] In the illustrated embodiment, a plug 24 is provided at one end of the wrench handle 2 near the wrench body 1. The plug 24 is used to connect to a socket on the housing of the electric actuator. The manual wrench includes a sealing ring 5, which is fitted around the plug 24 and seals the gap between the plug 24 and the socket. This design ensures that the electric actuator remains sealed during manual operation, preventing foreign objects from entering the housing of the electric actuator during manual operation.

[0028] Specifically, when the electric actuator is not required to be operated manually, the entire part of the manual wrench can be attached to the housing of the electric actuator, or the entire part of the manual wrench can be removed from the housing of the electric actuator. When the electric actuator needs to be operated manually, the entire part of the manual wrench can be reattached to the housing of the electric actuator. If it is removed, a plug can be installed to seal the socket on the housing of the electric actuator.

[0029] Specifically, in the illustrated embodiment, the wrench handle 2 includes an arm 22, an extension 23, and a grip 21. The grip 21 and the extension 23 are located at both ends of the arm 22 and are approximately perpendicular to the arm 22. The grip 21 is located on the side of the arm 22 away from the wrench body 1, and the extension 23 is located on the side of the arm 22 closer to the wrench body 1. The plug 24 is located at the end of the extension 23 away from the arm 22. This structure of the wrench handle 2 makes it easier to operate.

[0030] Specifically, in the illustrated embodiment, the wrench handle 2 has a stepped surface 25 at the end of the plug 24 away from the wrench body 1, and an annular stop portion 26 is provided on the outer periphery of the plug 24. Specifically, the stepped surface 25 is located at the junction of the extension 23 and the plug 24. A sealing groove for installing the sealing ring 5 is formed between the stepped surface 25 and the annular stop portion 26, and the sealing ring 5 is limited between the stepped surface 25 and the annular stop portion 26. Before or after manual operation, the entire part of the manual wrench is moved along the axial direction of the plug 24 to de-energize or energize the motor of the electric actuator. During the movement, the sealing ring 5 will not fall off the plug 24 under the stopping action of the stepped surface 25 and the annular stop portion 26. In addition, when the entire part of the manual wrench moves to the limit position in the direction close to the electromagnetic induction element 41, the stepped surface 25 can abut against the housing of the electric actuator to avoid exceeding the movement limit. Alternatively, a groove can be directly provided on the outer periphery of the plug 24 to form the sealing groove. In this case, the diameter of the plug 24 needs to be designed to be larger to ensure the strength of the groove location.

[0031] In the illustrated embodiment, the wrench handle 2 is provided with a mounting hole 27, and one end of the permanent magnet 3 and the wrench body 1 are both located within the mounting hole 27. More specifically, in the illustrated embodiment, the mounting hole 27 is at least partially provided in the plug 24, and the mounting hole 27 forms a socket on the end face of the plug 24 near the wrench body 1. More specifically, one end of the permanent magnet 3 and the wrench body 1 can be assembled into the mounting hole 27 after the wrench handle 2 is formed, or they can be pre-embedded in the forming mold of the wrench handle 2 so that they are naturally fixed together with the wrench handle 2 during the forming process.

[0032] In the illustrated embodiment, the wrench handle 2 is an injection-molded structure, preferably made of an aging-resistant material, such as rubber or plastic. Reinforcing ribs may be provided inside the wrench handle 2 to ensure sufficient strength.

[0033] The electric actuator provided in this application includes the aforementioned manual wrench, and also includes a motor, a driving part, and a driven part. The driving part is driven to the output shaft of the motor, and the driven part is driven to the driving part. When the motor is energized, it drives the driving part to move, which in turn drives the driven part to move.

[0034] When the electric actuator operates powered by a motor, the wrench body 1 of the manual wrench is in a disengaged state from the driving part of the electric actuator. When the electric actuator is operated manually, the wrench body 1 of the manual wrench is in a driving connection with the driving part of the electric actuator. Specifically, the manual wrench can be directly driven connected to the driving part of the electric actuator, or it can be indirectly driven connected to the driving part of the electric actuator through a clutch.

[0035] Specifically, the electric actuator includes a drive circuit, which is electrically connected to the output circuit of the manual wrench. The drive circuit can power on or off the motor according to the control signal output by the output circuit. More specifically, the electric actuator may include a second circuit board located inside the actuator's housing. The drive circuit is housed on the second circuit board to reduce the number of scattered electrical components. The second circuit board can be integrated with the first circuit board 4 or they can be separate.

[0036] The above examples illustrate the principles and implementation methods of this application. The descriptions of the embodiments are merely for the purpose of helping to understand the methods and core ideas of this application. It should be noted that those skilled in the art can make various improvements and modifications to this application without departing from its principles, and these improvements and modifications also fall within the protection scope of this application.

Claims

1. A manual wrench for an electric actuator, characterized in that, The manual wrench includes a wrench body (1), a wrench handle (2), a permanent magnet (3), and an output circuit. The output circuit is provided with an electromagnetic induction element (41). The wrench body (1), the wrench handle (2), and the permanent magnet (3) are fixed together to form an integral part. The integral part can move relative to the housing of the electric actuator to approach or move away from the electromagnetic induction element (41). The output circuit can output a first control signal in response to the approach of the integral part to control the motor of the electric actuator to de-energize, and output a control signal in response to the move away of the integral part to control the motor of the electric actuator to energize.

2. The manual wrench of the electric actuator according to claim 1, characterized in that, The wrench handle (2) is provided with a plug (24), which is used to be inserted into the socket on the housing of the electric actuator. The manual wrench includes a sealing ring (5), which is sleeved on the outer periphery of the plug (24) and is used to seal the gap between the plug (24) and the socket.

3. The manual wrench of the electric actuator according to claim 2, characterized in that, The wrench handle (2) has a stepped surface (25) at one end of the plug (24) away from the wrench body (1) and an annular stop (26) on the outer periphery of the plug (24). The sealing ring (5) is positioned between the stepped surface (25) and the annular stop (26).

4. The manual wrench with an electric actuator according to any one of claims 1-3, characterized in that, The wrench handle (2) is an injection molded structure.

5. The manual wrench of the electric actuator according to claim 4, characterized in that, The wrench handle (2) has a reinforcing rib inside.

6. The manual wrench of the electric actuator according to claim 4, characterized in that, The wrench handle (2) is provided with a mounting hole (27), and one end of the permanent magnet (3) and the wrench body (1) is located in the mounting hole (27).

7. The manual wrench with an electric actuator according to any one of claims 1-3, characterized in that, The manual wrench includes a first circuit board (4), the output circuit is located on the first circuit board (4), and the first circuit board (4) is located inside the housing of the electric actuator.

8. An electric actuator, characterized in that, The electric actuator includes the manual wrench as described in any one of claims 1-7, and further includes a motor, an active part that is driven and connected to the motor, and a driven part that is driven and connected to the active part. When operated manually, the end of the wrench body (1) away from the wrench handle (2) is driven and connected to the active part.

9. The electric actuator according to claim 8, characterized in that, The electric actuator includes a drive circuit, which is electrically connected to the output circuit. The drive circuit can power off or power on the motor according to the control signal output by the output circuit.

10. The electric actuator according to claim 9, characterized in that, The electric actuator includes a second circuit board, and the drive circuit is disposed on the second circuit board, which is located inside the housing of the electric actuator.

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