Electric operation actuator suitable for air switch

Abstract

The invention relates to an electric operation actuator suitable for an air switch, which comprises an actuator shell, a driving wheel is rotationally assembled on the actuator shell, and a flexible transmission part is connected to the driving wheel. The transmission part is provided with a transmission part force transmission part which is used for being connected with an operating handle so as to pull the operating handle to swing towards the closing direction when the front end of the transmission part is wound on the driving wheel and pushing the operating handle to swing towards the opening direction when the rear end of the transmission part moves backwards, and a power output wheel is in transmission connection with an output shaft of the driving motor; the power output wheel is provided with a fan-shaped transmission part, the driving wheel is provided with a fan-shaped transmission groove matched with the fan-shaped transmission part, the groove walls of the two circumferential ends of the fan-shaped transmission groove are arranged opposite to the two circumferential ends of the fan-shaped transmission part respectively, and the central angle of the fan-shaped transmission groove is larger than that of the fan-shaped transmission part. The invention provides the electric operation actuator suitable for the air switch, which can realize opening and closing of the air switch in an electric mode.

Description

Technical Field

[0001] The present invention relates to an opening and closing device of an air switch, and in particular to an electric operating actuator suitable for the air switch. Background Art

[0002] Air switch is a common switch device in the circuit. Its specific structure is as follows Figures 1 and 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, an opening position and a tripping position. When 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 closing position. When the circuit encounters special circumstances, such as overload or other conditions, the operating handle will be turned from the closing position to the tripping position, commonly known as "tripping". When it needs to be closed again, the operator needs to move the operating handle from the tripping position to the opening position, and then the operator moves the operating handle from the opening position to the closing position.

[0004] The problem with the opening and closing of the existing air switch is that the operator must go to the site to perform manual closing operations, and remote operation is not possible. This process is very time-consuming and labor-intensive. There are also some air switches on the market that can achieve remote closing operations by electric means, but the electric operating actuators of such air switches are usually assembled together with the air switch before leaving the factory, resulting in the operating handle not being exposed. On the one hand, this causes the air switch itself to lose its manual operation function, and on the other hand, this structure is not suitable for modification of existing air switches. Summary of the Invention

[0005] The object of the present invention is to provide an electric operating actuator suitable for an air switch, which can realize the opening and closing of the air switch in an electric manner.

[0006] The technical solutions of the present invention are as follows: The cam is secured to the cam face by means of a lever, and the lever is secured to the cam face by means of a lever, and the lever is secured to the cam face by means of a lever, and the lever is secured to the cam face by means of a lever, and the lever is secured to the cam face by means of a lever.

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

[0008] Furthermore, a transmission member guide channel is provided on the actuator housing, and the transmission member guide channel includes a first guide channel provided coaxially with the driving wheel and a second guide channel extending in the front-to-back direction, and the first guide channel is an arc-shaped guide channel.

[0009] Furthermore, the second guide channel is a linear channel extending in the front-to-back direction, the force transmission portion of the transmission member includes a transmission frame, the upper end of the operating handle passes 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, and 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-to-back direction.

[0010] Furthermore, the second guide channel includes a second channel arc portion coaxially arranged with the operating handle, the force transmission portion of the transmission member includes a transmission frame, the upper end of the operating handle passes 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, and the gap between the front frame arm and the rear frame arm is adapted to the thickness of the operating handle in the front-to-back direction.

[0011] Furthermore, the drive wheel includes a torque input drive wheel and a torque output drive wheel fixed together, a fan-shaped transmission groove is arranged on the torque input drive wheel, an outwardly protruding drive wheel connection structure is arranged on the outer periphery of the torque output drive wheel, and the front end of the transmission member is connected to the drive wheel connection structure.

[0012] Furthermore, there are two transmission parts, namely a left transmission part located on the left side of the operating handle and a right transmission part located on the right side of the operating handle. The torque output drive wheel includes a left torque output drive wheel connected to the left transmission part and a right torque output drive wheel connected to the right transmission part.

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

[0014] Beneficial effects of the present invention: When the present invention is in use, the driving wheel transmits force to the operating handle through the transmission member. For example, when a closing operation is required, the driving wheel rotates, and the front end of the transmission member is wrapped around the driving wheel. The transmission member pulls the operating handle in the closing direction to swing, thereby achieving closing; when an opening operation is required, the driving wheel rotates, and the rear end of the transmission member swings with the operating handle in the opening direction to achieve opening. The front end of the transmission member can be wrapped around the driving wheel, so the space occupied by the equipment in the front and rear directions can be reduced, which is convenient for use in environments with a smaller upper end size such as a switch housing; in addition, in the present invention, the central angle of the fan-shaped transmission groove is greater than the central angle of the fan-shaped transmission part. After the driving wheel pulls the operating handle to the closing position through the transmission member, the driving motor rotates in the opposite direction, so that the fan-shaped transmission part no longer contacts one side of the fan-shaped transmission groove. At this time, when the circuit encounters a problem, the operating handle can trip normally, and the staff can also operate manually to achieve the opening and closing operations of the air switch. The electric operating actuator will not affect the manual opening and closing operations of the air switch. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a structural diagram of an electrical switch in the prior art of the present invention; Figure 2 for Figure 1 A top view of Figure 3 1 is a diagram showing the state of use of the electrically operated actuator according to the first embodiment of the present invention; Figure 4 Schematic diagram of the coordination between the drive motor and the transmission shaft in Example 1; Figure 5 Schematic diagram of the cooperation between the left torque output drive wheel and the left transmission member when the operating handle is in the open position in Example 1; Figure 6 yes Figure 5 Schematic diagram of the coordination between the power take-off wheel and the torque input drive wheel in the state; Figure 7 This is a schematic diagram of the state when the force transmission member pulls the operating handle to the closing position in Example 1; Figure 8 yes Figure 7 Schematic diagram of the coordination between the power take-off wheel and the torque input drive wheel in the state; Figure 9 This is a schematic diagram of the coordination between the power output wheel and the torque input drive wheel when waiting for the work station after the power output gear is reversed 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 Schematic diagram of the coordination between the power take-off wheel and the torque input drive wheel in the state; Figure 12 is a diagram of a state in which an electrically operated actuator according to a second embodiment of the present invention is used; In the figure: 1. switch housing; 2. operating handle; 3. drive motor; 4. left transmission member; 5. right transmission member; 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 connecting structure; 18. fan-shaped transmission part; 19. fan-shaped transmission groove; 20. arc-shaped part of the second channel; 21. actuator housing; 22. transmission member. DETAILED DESCRIPTION

[0016] In order to make the objectives, technical solutions, and advantages of the present invention more clearly understood, the present invention is 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 intended to explain the present invention and are not intended to limit the present invention. That is, the embodiments described herein are only some embodiments of the present invention, not all embodiments. Generally, the components of the embodiments of the present invention described and illustrated in the drawings herein may 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 invention as claimed, but is merely intended to represent selected embodiments of the present invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative work 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 only to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the terms "comprises," "comprising," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus comprising a series of elements includes not only those elements, but also other elements not explicitly listed, or elements inherent to such process, method, article, or apparatus. In the absence of further limitations, an element defined by the phrase "comprising a ..." does not exclude the presence of additional identical elements in the process, method, article, or apparatus comprising the element.

[0019] The features and performance of the present invention are further described in detail below with reference to the embodiments.

[0020] The present invention is an electric operation actuator suitable for air switch embodiment 1 as shown in FIG. Figures 3 to 11 As shown: The actuator housing 21 is fixed to the upper front end of the switch housing 1 during use. A drive wheel with a rotational axis extending in the left-right direction is rotatably mounted on the actuator housing. The drive wheel is driven by a drive motor 3. A flexible transmission member, in this embodiment a chain, is connected to the drive wheel. The transmission member has a force transmission portion that connects to the operating handle so that when the front end of the transmission member is wrapped around the drive wheel, the operating handle is pulled to swing in the closing direction; when the rear end of the transmission member moves backward, the operating handle is pushed to swing in the opening direction.

[0021] The output shaft of the drive motor is connected to a power take-off wheel 11. 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. The power take-off wheel 11 is provided with a fan-shaped transmission portion 18. The drive wheel is provided with a fan-shaped transmission groove 19 that cooperates with the fan-shaped transmission portion. The groove walls at both ends of the fan-shaped transmission groove are respectively arranged relative to the circumferential ends of the fan-shaped transmission portion. The central angle of the fan-shaped transmission groove is greater than the central angle of the fan-shaped transmission portion. In this embodiment, the central angle of the fan-shaped transmission groove is more than 2.5 times the central angle of the fan-shaped transmission portion. In this embodiment, the central angle of the fan-shaped transmission groove is 2.8 to 3.3 times the central angle of the fan-shaped transmission portion.

[0022] In this embodiment, there are two transmission members: a left transmission member 4 located to the left of the operating handle and a right transmission member 5 located to the right of the operating handle. The force transmission portion of the transmission members includes a transmission frame 7 connected to the rear ends of the left and right transmission members 4 and 5. The upper end of the operating handle 2 protrudes from the upper side of the transmission frame, making it convenient for fingers to apply force to the operating handle. 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 and rear frame arms 9 and 8 is at least 1.2 times the thickness of the operating handle in the front-to-back direction.

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

[0024] The torque output drive wheels include 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 aforementioned drive wheel connection structure 17. The front end of each transmission member is hingedly connected to the drive wheel connection structure 17 of the corresponding torque output drive wheel. A drive shaft 10, whose axis extends in the left-right direction, is coaxially fixed to the torque input drive wheel. The drive 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, a transmission member guide channel is provided on the actuator housing. The transmission member guide channel includes a first guide channel 16 arranged coaxially with the drive wheel and a second guide channel 15 extending in the front-to-back direction. The first guide channel 16 is an arc-shaped guide channel, and the second guide channel 15 is a linear channel extending in the front-to-back direction. The reason why the gap between the front and rear frame arms is greater than 1.2 times the front-to-back thickness of the operating handle, for example, 1.2 to 1.5 times, is because when the operating handle is in the tripped 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. In this case, the space occupied by the operating handle in the front-to-back 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-to-back thickness of the operating handle to accommodate the tilted operating handle.

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

[0027] In order to prevent the driving motor from affecting the normal tripping of the operating handle, after the operating handle reaches the closing state, the power output wheel 11 carries the fan-shaped transmission 18 to rotate clockwise to the position shown in FIG. Figure 9 The state shown in the figure is that the electric actuator can be called the waiting position. If there is a problem with the circuit, the operating handle will be turned from the closing position to the tripping position. Figures 10-11As shown, the left transmission member and the right transmission member will drive the corresponding torque output drive wheel to rotate clockwise, and the torque input drive wheel will also rotate clockwise. The fan-shaped transmission part 18 will not affect the normal rotation of the torque input drive wheel 12, so the operating handle can achieve normal tripping operation. When manual closing operation is required, the staff can manually push the operating handle to the opening position, and then manually push the operating handle to the closing position. The electric operation actuator will not affect the manual opening and closing operations.

[0028] In other embodiments of the present invention, the transmission member can also be a transmission belt; of course, the transmission member can also be an anti-bending chain that will not bend when subjected to thrust. In this case, there is no need to set a transmission member guide channel on the actuator issue; there can also be only one transmission member, in which case the transmission member is connected to the middle of the front end of the transmission frame.

[0029] An embodiment 2 of an electrically operated actuator suitable for an air switch Figure 12 As shown: Example 2 is different from Example 1 in that there is only one transmission member 22 in this embodiment, and the second guide channel includes a second channel arc portion 20 arranged coaxially with the operating handle. Due to the guidance of the second channel arc portion 20, the transmission member can carry the transmission frame to move in an arc trajectory. At this time, during the swinging of the operating handle 2, the operating handle can always be perpendicular to the transmission frame. Therefore, for the transmission frame, the gap between the front frame arm 9 and the 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 thickness of the operating handle in the front and rear directions. During the swinging of the operating handle, it is not easy to be stuck by the transmission member.

[0030] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. The scope of patent protection of the present invention shall be based on the claims. Any equivalent structural changes made using the description and drawings of the present invention shall be included in the scope of protection of the present invention.

Claims

1. An electrically operated actuator suitable for an air switch, characterized in that: The cam is driven by a gear which is rotated to move the gears and pull the gears so that the gears are in a rotation relationship with each other, and the cam is rotated to move the gears so that the gears are in a rotation relationship with each other, and the cam is rotated to move the gears so that the gears are in a rotation relationship with each other, and the cam is rotated to move the gears so that the gears are in a rotation relationship with each other, and the cam is rotated to move the gears so that the gears are in a rotation relationship with each other, and the cam is rotated to move the gears 2. The electrically operated actuator according to claim 1, characterized in that: The central angle of the fan-shaped transmission groove is more than 2.5 times the central angle of the fan-shaped transmission part.

3. The electrically operated actuator according to claim 1, characterized in that: A transmission member guide channel is provided on the actuator housing. The transmission member guide channel includes a first guide channel coaxially arranged with the driving wheel and a second guide channel extending in the front-to-back 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 linear channel extending in the front-to-back direction. The force transmission part of the transmission member includes a transmission frame. The upper end of the operating handle passes 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 more than 1.2 times the thickness of the operating handle in the front-to-back direction.

5. The electrically operated actuator according to claim 3, wherein: The second guide channel includes a second channel arc portion coaxially arranged with the operating handle, the force transmission portion of the transmission member includes a transmission frame, the upper end of the operating handle passes 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, and the gap between the front frame arm and the rear frame arm is adapted to the thickness of the operating handle in the front-to-back direction.

6. The electrically operated actuator according to claim 3, characterized in that: The transmission member 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 fan-shaped transmission groove is set on the torque input drive wheel, and an outwardly protruding drive wheel connection structure is set on the outer periphery of the torque output drive wheel, and the front end of the transmission member is connected to the drive wheel connection structure.

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

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

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