Electrically operated actuator for air breakers

Abstract

The utility model relates to an electric operating executor suitable for air switch, including executor casing, the executor casing rotates and is equipped with drive wheel, is connected with flexible transmission spare on drive wheel, transmission spare has transmission force part for being connected with operating handle to pull operating handle swing to closing direction when transmission spare front end winding on drive wheel, pushes operating handle swing to opening direction when transmission spare rear end moves to back, the output shaft of drive motor is connected with power output wheel transmission, is provided with sector transmission part on power output wheel, is provided with sector transmission groove that cooperates with sector transmission part on drive wheel, the circumferential both ends groove wall of sector transmission groove are opposite respectively with the circumferential both ends end portion of sector transmission part arrangement, the central angle of sector transmission groove is greater than the central angle of sector transmission part. The utility model provides an electric operating executor suitable for air switch can realize the opening and closing of air switch through electric mode.

Description

Technical Field

[0001] This utility model relates to a device for opening and closing air switches, and more particularly to an electric operating actuator suitable for air switches. Background Technology

[0002] An air switch is a common switching device in a circuit. Its specific structure is as follows: Figures 1-2 As shown, it includes a switch housing 1, and an operating handle 2 is provided at the upper end of the switch housing. The operating handle has a closing position, a opening position, and a tripping position. In use, the operating handle can be swung from the closing position to the tripping position, from the tripping position to the opening position, and from the opening position to the closing position. When in the tripping position, the operating handle is between the closing position and the opening position.

[0003] When the circuit is working normally, the operating handle is in the closed position. When the circuit encounters special circumstances, such as overload or other conditions, the operating handle will rotate from the closed position to the trip position, commonly known as "tripping". When it is necessary to close the circuit again, the operator needs to move the operating handle from the trip position to the open position, and then the operator moves the operating handle from the open position back to the closed position.

[0004] The problem with existing air circuit breakers is that they require manual operation by personnel on-site, and cannot be operated remotely, which is very time-consuming and labor-intensive. There are some air circuit breakers on the market that can be remotely operated electrically, but the electric actuators of those air circuit breakers are usually assembled with the air circuit breaker at the factory, resulting in the operating handle not being exposed. This causes the air circuit breaker to lose its manual operation function, and on the other hand, this structure is not suitable for modifying existing air circuit breakers. Utility Model Content

[0005] The purpose of this invention is to provide an electric operating actuator suitable for air switches that can electrically open and close air switches.

[0006] The technical solution of this utility model is as follows: An electric operating actuator suitable for air switches includes an actuator housing fixed to the upper front end of the switch housing during use. A drive wheel with a rotation axis extending in the left-right direction is rotatably mounted on the actuator housing. The drive wheel is driven by a drive motor. A flexible transmission component is connected to the drive wheel. The transmission component has a force transmission part for connecting to an operating handle so that when the front end of the transmission component is wrapped around the drive wheel, it pulls the operating handle to swing in the closing direction, and when the rear end of the transmission component moves backward, it pushes the operating handle to swing in the opening direction. A power output wheel is drivenly connected to the output shaft of the drive motor. A sector-shaped transmission part is provided on the power output wheel. A sector-shaped transmission groove is provided on the drive wheel to cooperate with the sector-shaped transmission part. The two circumferential end walls of the sector-shaped transmission groove are respectively arranged opposite to the two circumferential end ends of the sector-shaped transmission part. The central angle of the sector-shaped transmission groove is larger than the central angle of the sector-shaped transmission part.

[0007] Furthermore, the central angle of the sector-shaped transmission groove is more than 2.5 times the central angle of the sector-shaped transmission part.

[0008] Furthermore, the actuator housing is provided with a transmission component guide channel, which includes a first guide channel coaxial with the drive wheel and a second guide channel extending in the front-rear direction. The first guide channel is an arc-shaped guide channel.

[0009] Furthermore, the second guide channel is a straight channel extending in the front-back direction. The force transmission part of the transmission component includes a transmission frame. The upper end of the operating handle extends out from the upper side of the transmission frame. The transmission frame includes a rear frame arm for pushing the operating handle forward and a front frame arm for pushing the operating handle backward. The gap between the front frame arm and the rear frame arm is more than 1.2 times the thickness of the operating handle in the front-back direction.

[0010] Furthermore, the second guide channel includes a second channel arc-shaped portion coaxially arranged with the operating handle, and the transmission force transmission part includes a transmission frame. The upper end of the operating handle extends through the upper side of the transmission frame. The transmission frame includes a rear frame arm for pushing the operating handle forward and a front frame arm for pushing the operating handle backward. The gap between the front frame arm and the rear frame arm is adapted to the thickness of the operating handle in the front-rear direction.

[0011] Furthermore, the drive wheel includes a torque input drive wheel and a torque output drive wheel fixed together. A sector-shaped transmission groove is provided on the torque input drive wheel, and a protruding drive wheel connection structure is provided on the outer periphery of the torque output drive wheel. The front end of the transmission component is connected to the drive wheel connection structure.

[0012] Furthermore, there are two transmission components: a left transmission component located to the left of the operating handle and a right transmission component located to the right of the operating handle. The torque output drive wheel includes a left torque output drive wheel connected to the left transmission component and a right torque output drive wheel connected to the right transmission component.

[0013] Furthermore, a drive shaft extending in the left-right direction is coaxially fixed on the torque input drive wheel, and the drive shaft is fixedly connected to the left torque output drive wheel and the right torque output drive wheel.

[0014] The beneficial effects of this utility model are as follows: In use, the drive wheel transmits force to the operating handle via a transmission component. For example, when closing the circuit, the drive wheel rotates, and the front end of the transmission component wraps around the drive wheel, pulling the operating handle in the closing direction to achieve closing. When opening the circuit, the drive wheel rotates, and the rear end of the transmission component swings the operating handle in the opening direction to achieve opening. The front end of the transmission component can wrap around the drive wheel, thus reducing the space occupied by the device in the front-to-back direction, making it suitable for use in environments with small upper dimensions, such as switch housings. Furthermore, in this utility model, the central angle of the sector-shaped transmission groove is greater than the central angle of the sector-shaped transmission part. After the drive wheel pulls the operating handle to the closing position via the transmission component, the drive motor rotates in the opposite direction, so that the sector-shaped transmission part no longer contacts one side of the sector-shaped transmission groove. At this time, if a circuit problem occurs, the operating handle can trip normally, and the operator can also manually operate the circuit breaker to achieve opening and closing operations. The electric operating actuator will not affect the manual opening and closing operations of the circuit breaker. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the structure of an electrical switch in the prior art of this utility model; Figure 2 for Figure 1 Top view; Figure 3 This is a usage diagram of the electric operating actuator of Embodiment 1 of this utility model; Figure 4 This is a schematic diagram of the connection between the drive motor and the transmission shaft in Example 1; Figure 5 This is a schematic diagram showing the interaction between the left torque output drive wheel and the left transmission component when the operating handle is in the open position in Embodiment 1. Figure 6 yes Figure 5 A schematic diagram showing the interaction between the power output wheel and the torque input drive wheel under certain conditions; Figure 7 This is a schematic diagram of the state when the force transmission component pulls the operating handle to the closed position in Embodiment 1; Figure 8 yes Figure 7 A schematic diagram showing the interaction between the power output wheel and the torque input drive wheel under certain conditions; Figure 9 This is a schematic diagram of the interaction between the power output wheel and the torque input drive wheel when waiting for the work station after the power output gear reverses in Example 1. Figure 10This is a schematic diagram of the state after the operating handle trips in Example 1; Figure 11 yes Figure 10 A schematic diagram showing the interaction between the power output wheel and the torque input drive wheel under certain conditions; Figure 12 This is a usage state diagram of the electric operating actuator of Embodiment 2 of this utility model; In the diagram: 1. Switch housing; 2. Operating handle; 3. Drive motor; 4. Left transmission component; 5. Right transmission component; 6. Output shaft of drive motor; 7. Transmission frame; 8. Rear frame arm; 9. Front frame arm; 10. Transmission shaft; 11. Power output wheel; 12. Torque input drive wheel; 13. Left torque output drive wheel; 14. Right torque output drive wheel; 15. Second guide channel; 16. First guide channel; 17. Drive wheel connection structure; 18. Sector-shaped transmission part; 19. Sector-shaped transmission groove; 20. Arc-shaped part of the second channel; 21. Actuator housing; 22. Transmission component. Detailed Implementation

[0016] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only for explaining the present utility model and are not intended to limit the present utility model; that is, the described embodiments are only some embodiments of the present utility model, and not all embodiments. The components of the embodiments of the present utility model described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0017] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without inventive effort are within the scope of protection of the present invention.

[0018] It should be noted that relational terms such as "first" and "second" are used merely to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0019] The features and performance of this utility model will be further described in detail below with reference to the embodiments.

[0020] Embodiment 1 of this utility model is an electric operating actuator suitable for air switches. Figures 3-11 As shown: The device includes an actuator housing 21 fixed to the upper front end of the switch housing 1 during use. A drive wheel with its rotation axis extending in the left-right direction is rotatably mounted on the actuator housing. The drive wheel is driven by a drive motor 3, and a flexible transmission component is connected to the drive wheel. In this embodiment, the transmission component is a chain. The transmission component has a force transmission part for connecting to the operating handle so that when the front end of the transmission component is wound around the drive wheel, it pulls the operating handle to swing in the closing direction; and when the rear end of the transmission component moves backward, it pushes the operating handle to swing in the opening direction.

[0021] A power output wheel 11 is driven and connected to the output shaft of the drive motor. The output shaft of the drive motor can be the motor shaft of the drive motor or the output shaft of the transmission after the drive motor is connected to the transmission. A sector-shaped transmission part 18 is provided on the power output wheel 11, and a sector-shaped transmission groove 19 that cooperates with the sector-shaped transmission part is provided on the drive wheel. The two circumferential ends of the sector-shaped transmission groove are respectively arranged opposite to the two circumferential ends of the sector-shaped transmission part. The central angle of the sector-shaped transmission groove is larger than the central angle of the sector-shaped transmission part. In this embodiment, the central angle of the sector-shaped transmission groove is more than 2.5 times the central angle of the sector-shaped transmission part. In this embodiment, the central angle of the sector-shaped transmission groove is 2.8 to 3.3 times the central angle of the sector-shaped transmission part.

[0022] In this embodiment, there are two transmission components: a left transmission component 4 located to the left of the operating handle and a right transmission component 5 located to the right of the operating handle. The force transmission part of the transmission component includes a transmission frame 7 connected to the rear end of the left transmission component 4 and the right transmission component 5. The upper end of the operating handle 2 protrudes from the upper side of the transmission frame, facilitating the application of force to the operating handle by the fingers. The transmission frame 7 includes a rear frame arm 8 for pushing the operating handle forward and a front frame arm 9 for pushing the operating handle backward. The gap between the front frame arm 9 and the rear frame arm 8 is more than 1.2 times the thickness of the operating handle in the front-rear direction.

[0023] The drive wheel includes a torque input drive wheel 12 and a torque output drive wheel fixed together. A sector-shaped transmission groove 19 is provided on the torque input drive wheel 12, and a protruding drive wheel connection structure 17 is provided on the outer periphery of the torque output drive wheel.

[0024] The torque output drive wheel includes a left torque output drive wheel 13 connected to the left transmission member 4 and a right torque output drive wheel 14 connected to the right transmission member 5. The left torque output drive wheel 13 and the right torque output drive wheel 14 are spaced apart from each other. Each torque output drive wheel is provided with the drive wheel connection structure 17. The front end of each transmission member is hinged to the drive wheel connection structure 17 of the corresponding torque output drive wheel. A transmission shaft 10 extending in the left-right direction is fixedly fixed on the torque input drive wheel. The transmission shaft 10 is fixedly connected to the left torque output drive wheel 13 and the right torque output drive wheel 14.

[0025] In this embodiment, the actuator housing is provided with a transmission guide channel, which includes a first guide channel 16 coaxially arranged with the drive wheel and a second guide channel 15 extending in the front-rear direction. The first guide channel 16 is an arc-shaped guide channel, and the second guide channel 15 is a straight channel extending in the front-rear direction. The reason why the gap between the front and rear frame arms is more than 1.2 times, for example, 1.2 to 1.5 times, the front-rear thickness of the operating handle is that when the operating handle is in the trip position, the operating handle is arranged perpendicularly to the transmission frame. When the operating handle is in the closed or open position, the operating handle is arranged at an angle to the transmission frame. At this time, the space occupied by the operating handle in the front-rear direction is greater than the thickness of the operating handle. Therefore, the gap between the front and rear frame arms needs to be greater than the front-rear thickness of the operating handle to accommodate the angled operating handle.

[0026] When operating the control handle using an electric actuator, if it is necessary to rotate the control handle from the open position to the closed position, such as... Figures 5-6As shown, the output shaft 6 of the drive motor drives the power output wheel 11 to rotate counterclockwise. The power output wheel 11 drives the torque input drive wheel 12 to rotate counterclockwise through the sector transmission part 18. The left torque output wheel and the right torque output wheel drive the transmission frame forward through the left transmission component and the right transmission component, respectively. The rear frame arm of the transmission frame pushes the operating handle to rotate to the closed state. At this time, as shown... Figures 7-8 As shown.

[0027] To ensure the drive motor does not interfere with the normal tripping of the operating handle, after the operating handle reaches the closed position, the power output wheel 11, carrying the sector drive 18, rotates clockwise to the position shown. Figure 9 As shown, the electric actuator is in a waiting position. If a circuit problem occurs at this time, the operating handle will rotate from the closing position to the tripping position, as shown. Figures 10-11 As shown, the left and right transmission components will drive the corresponding torque output drive wheel to rotate clockwise, and the torque input drive wheel will also rotate clockwise. The sector transmission part 18 will not affect the normal rotation of the torque input drive wheel 12. Therefore, the operating handle can achieve normal tripping operation. When manual closing operation is required, the operator can manually push the operating handle to the opening position and then manually push the operating handle to the closing position. The electric operating actuator will not affect the manual opening and closing operation.

[0028] In other embodiments of this utility model, the transmission component can also be a transmission belt; of course, the transmission component can also be an anti-bending chain that will not bend when subjected to thrust, in which case the actuator does not need to be equipped with a transmission component guide channel; there can also be only one transmission component, in which case the transmission component is connected to the front middle of the transmission frame.

[0029] Embodiment 2 of an electrically operated actuator suitable for air switches Figure 12 As shown: The difference between Embodiment 2 and Embodiment 1 is that there is only one transmission component 22 in this embodiment. Moreover, the second guide channel includes a second channel arc-shaped portion 20 arranged coaxially with the operating handle. Due to the guidance of the second channel arc-shaped portion 20, the transmission component can carry the transmission frame to move in an arc-shaped trajectory. At this time, during the swing of the operating handle 2, the operating handle can always be perpendicular to the transmission frame. Therefore, for the transmission frame, the gap between its front frame arm 9 and rear frame arm 8 does not need to be too large. The gap between the front frame arm and the rear frame arm can be adapted to the front-rear thickness of the operating handle. During the swing of the operating handle, it is not easy to be stuck by the transmission component.

[0030] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. The patent protection scope of the present utility model shall be determined by the claims. Similarly, any equivalent structural changes made based on the description and drawings of the present utility model shall also be included within the protection scope of the present utility model.

Claims

1. An electrically operated actuator suitable for air switches, characterized in that, The device includes an actuator housing fixed to the upper front end of the switch housing during use. A drive wheel with a rotation axis extending in the left-right direction is rotatably mounted on the actuator housing. The drive wheel is driven by a drive motor and a flexible transmission component is connected to the drive wheel. The transmission component has a force transmission part for connecting to an operating handle so that when the front end of the transmission component is wrapped around the drive wheel, it pulls the operating handle to swing in the closing direction, and when the rear end of the transmission component moves backward, it pushes the operating handle to swing in the opening direction. A power output wheel is driven to the output shaft of the drive motor. A sector-shaped transmission part is provided on the power output wheel. A sector-shaped transmission groove that cooperates with the sector-shaped transmission part is provided on the drive wheel. The two circumferential ends of the sector-shaped transmission groove are respectively arranged opposite to the two circumferential ends of the sector-shaped transmission part. The central angle of the sector-shaped transmission groove is larger than the central angle of the sector-shaped transmission part.

2. The electrically operated actuator according to claim 1, characterized in that: The central angle of the sector-shaped transmission groove is more than 2.5 times the central angle of the sector-shaped transmission part.

3. The electrically operated actuator according to claim 1, characterized in that: The actuator housing is provided with a transmission component guide channel, which includes a first guide channel arranged coaxially with the drive wheel and a second guide channel extending in the front-rear direction. The first guide channel is an arc-shaped guide channel.

4. The electrically operated actuator according to claim 3, characterized in that: The second guide channel is a straight channel extending in the front-back direction. The force transmission part of the transmission component includes a transmission frame. The upper end of the operating handle extends out from the upper side of the transmission frame. The transmission frame includes a rear frame arm for pushing the operating handle forward and a front frame arm for pushing the operating handle backward. The gap between the front frame arm and the rear frame arm is more than 1.2 times the thickness of the operating handle in the front-back direction.

5. The electrically operated actuator according to claim 3, characterized in that: The second guide channel includes a second channel arc-shaped portion coaxial with the operating handle. The transmission force part of the transmission component includes a transmission frame. The upper end of the operating handle extends through the upper side of the transmission frame. The transmission frame includes a rear frame arm for pushing the operating handle forward and a front frame arm for pushing the operating handle backward. The gap between the front frame arm and the rear frame arm is adapted to the thickness of the operating handle in the front-back direction.

6. The electrically operated actuator according to claim 3, characterized in that: The transmission component is a transmission chain or a transmission belt.

7. The electrically operated actuator according to any one of claims 1 to 6, characterized in that: The drive wheel includes a torque input drive wheel and a torque output drive wheel fixed together. A sector-shaped transmission groove is provided on the torque input drive wheel. The outer periphery of the torque output drive wheel is provided with a protruding drive wheel connection structure. The front end of the transmission component is connected to the drive wheel connection structure.

8. The electrically operated actuator according to claim 7, characterized in that: There are two transmission components: a left transmission component located to the left of the operating handle and a right transmission component located to the right of the operating handle. The torque output drive wheel includes a left torque output drive wheel connected to the left transmission component and a right torque output drive wheel connected to the right transmission component.

9. The electrically operated actuator according to claim 7, characterized in that: A drive shaft extending in the left-right direction is fixed coaxially on the torque input drive wheel, and the drive shaft is fixedly connected to the left torque output drive wheel and the right torque output drive wheel.

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