Electric operation actuator suitable for electric appliance switch

Abstract

The invention relates to an electric operation actuator suitable for an electric switch, which comprises an actuator base, a driving motor is arranged at the left end of the actuator base, a planetary gear reducing mechanism is connected to the driving motor, the planetary gear reducing mechanism comprises a sun gear and a transmission sleeve, and a gear ring is arranged on the inner side of the transmission sleeve. The planetary gear reducing mechanism further comprises an output shaft connected with the planetary gear, a locking disc is fixed to the left end of the actuator base, a fan-shaped transmission disc is fixed to the output shaft, a fan-shaped transmission groove is formed in the locking disc, and the fan-shaped transmission disc is connected with the planetary gear. The groove walls of the two circumferential ends of the fan-shaped transmission groove are opposite to the two circumferential ends of the fan-shaped transmission disc respectively, the central angle of the fan-shaped transmission groove is larger than that of the fan-shaped transmission disc, and a flexible transmission piece with the rear end used for being connected with an operation handle to transmit push-pull force to the operation handle is wound around the middle of the transmission sleeve. The invention provides the electric operation actuator suitable for the electric appliance switch, which can be used for carrying out electric opening and closing operation on the electric appliance switch.

Description

Technical Field

[0001] The invention relates to an opening and closing device of an electrical switch, and in particular to an electric operating actuator. Background Art

[0002] Electrical switches, such as circuit breakers, are common switching devices in circuits. Their specific structures are 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 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 existing electrical switches 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 electrical switches on the market that can achieve remote closing operations by electric power, but the electric operating actuators of such electrical switches are usually assembled together with the electrical switches before leaving the factory, resulting in the operating handle not being exposed. On the one hand, this causes the electrical switch itself to lose its manual operation function, and on the other hand, this structure is not suitable for modification of existing electrical switches. Summary of the Invention

[0005] The object of the present invention is to provide an electric operation actuator suitable for an electrical switch, which can perform electric opening and closing operations on the electrical switch.

[0006] The technical solution of the electric operation actuator applicable to the electrical switch of the present invention is as follows: The transmission mechanism is connected with the gear train of claim 1, wherein the gear train is connected to the transmission mechanism and the gear train is connected to the gear train.

[0007] Furthermore, an annular groove is provided in the middle of the transmission sleeve, and the annular groove is located between the motor housing of the drive motor and the planetary gear, and the front end of the flexible transmission member is wound in the annular groove.

[0008] Furthermore, the flexible transmission member is a chain or a transmission belt.

[0009] Furthermore, the actuator base includes a left base side plate and a right base side plate that are spaced apart from each other. The right end of the motor housing of the drive motor is fixed to the right base side plate, and the locking plate is fixed to the left base side plate.

[0010] Furthermore, the central angle of the fan-shaped transmission groove is more than 2.5 times the central angle of the fan-shaped transmission disc.

[0011] Furthermore, a transmission frame is provided at the rear end of the flexible transmission member, and the transmission frame includes a front frame arm and a right frame arm spaced apart from each other, and the upper end of the operating handle passes through between the front frame arm and the rear frame arm.

[0012] Furthermore, a guide channel extending in the front-rear direction is provided on the actuator base, the flexible transmission member cooperates with the guide channel for guiding movement, and the left and right ends of the transmission frame cooperate with the guide channel for guiding movement.

[0013] The beneficial effects of the present invention are as follows: when an electric operating actuator is required to realize the closing operation of the operating handle, the motor shaft of the driving motor transmits power to the sun gear. Since the transmission sleeve connected to the ring gear is connected to the operating handle through a flexible transmission part, it is equivalent to a load on the ring gear. Initially, the output shaft of the planetary gear reduction mechanism outputs power until the fan-shaped transmission plate on the output shaft and the circumferential end of the fan-shaped transmission groove on the locking plate are blocked and engaged. At this time, the output shaft is blocked and cannot continue to rotate. The power of the planetary gear reduction mechanism will be transmitted to the transmission sleeve through the ring gear. The transmission sleeve can pull the operating handle in the closing direction through the flexible transmission part until it is closed. After closing the circuit, the drive motor can reverse. During this process, the transmission sleeve connected to the ring gear is connected to the operating handle through a flexible transmission part, so it is equivalent to having a load on the ring gear. During the reversal of the drive motor, only the output shaft carries the fan-shaped transmission disk to reverse. When a problem occurs in the circuit, the operating handle is transferred from the closing position to the tripping position. The operating handle rotates with the transmission sleeve through the flexible transmission part, and the power of the transmission sleeve is transmitted to the output shaft through the ring gear. The drive motor will not affect the normal tripping operation of the operating handle, and the operating handle can also be electrically operated according to needs. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] 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 This is a structural diagram of an embodiment of an electrically operated actuator suitable for an electrical switch in the present invention; Figure 4 This is a schematic diagram of the cooperation between the drive motor and the planetary gear reduction mechanism in the present invention; Figure 5 It is a schematic diagram of the cooperation between the transmission sleeve and the flexible transmission member in the present invention; Figure 6 This is a schematic diagram of the cooperation between the fan-shaped transmission disc and the fan-shaped transmission groove when the operating handle is in the tripping position in the present invention; Figure 7 yes Figure 6 Schematic diagram of the state after the locking plate is removed; Figure 8 yes Figure 6 Schematic diagram of the state after removing the planet carrier; In the figure: 1. Switch housing; 2. Operating handle; 3. Transmission frame; 4. Rear frame arm; 5. Front frame arm; 6. Guide channel; 7. Left base side panel; 8. Right base side panel; 9. Transmission sleeve; 10. Flexible transmission member; 11. Annular groove; 12. Bearing; 13. Drive motor; 14. Base plate; 15. Motor shaft; 16. Sun gear; 17. Planet gear; 18. Ring gear; 19. Planet carrier; 20. Locking plate; 21. Fan-shaped transmission plate; 22. Output shaft; 23. Fan-shaped transmission groove. DETAILED DESCRIPTION

[0015] 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.

[0016] 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.

[0017] 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.

[0018] The features and performance of the present invention are further described in detail below with reference to the embodiments.

[0019] An embodiment of an electrically operated actuator suitable for an electrical switch of the present invention is as follows: Figures 1 to 8 As shown: It includes an actuator base, which includes a base plate 14 for being adhesively fixed to the upper end of the front side of the switch housing, a left base side plate 7 is fixed to the left side of the base plate 14, and a right base side plate 8 is fixed to the right side of the base plate. A drive motor 13 with an axis extending in the left-right direction is fixed to the right side of the left base side plate 7. The drive motor 13 has a motor shaft 15 with an axis extending in the left-right direction. A planetary gear reduction mechanism is connected to the motor shaft 15 of the drive motor. The planetary gear reduction mechanism includes a sun gear 16 and a transmission sleeve 9 whose right end is connected to the outer periphery of the motor housing of the drive motor through a bearing 12.

[0020] The sun gear 16 is fixed to the left end of the motor shaft of the drive motor, and a ring gear 18 is provided on the inner side of the left end of the transmission sleeve 9. The sun gear 16 and the ring gear 18 are connected through three planetary gears. The planetary gear reduction mechanism also includes a planetary carrier 19 connected to the three planetary gears. The planetary carrier 19 is connected to an output shaft 22, and the axis of the output shaft 22 extends in the left and right directions.

[0021] A fan-shaped transmission disk 21 is fixed on the output shaft 22, and a locking disk 20 is fixed on the right base side plate. The locking disk 20 is provided with a fan-shaped transmission groove 23 that cooperates with the fan-shaped transmission disk. The groove walls at both ends of the circumference of the fan-shaped transmission groove 23 are respectively arranged opposite to the circumferential ends of the fan-shaped transmission disk. The central angle of the fan-shaped transmission groove 23 is greater than the central angle of the fan-shaped transmission disk 21. In this embodiment, the central angle of the fan-shaped transmission groove 23 is more than 2.5 times the central angle of the fan-shaped transmission disk. Specifically, the central angle of the fan-shaped transmission groove is 2.8~3.5 times the central angle of the fan-shaped transmission disk.

[0022] A flexible transmission member 10 is wrapped around the middle of the transmission sleeve, the rear end of which is connected to the operating handle to transmit push and pull force to the operating handle. Specifically, an annular groove 11 is provided in the middle of the transmission sleeve. The annular groove 11 is located between the motor housing of the drive motor and the planetary gear. The front end of the flexible transmission member 10 is wrapped in the annular groove 11, and the flexible transmission member 10 is hingedly connected to the hinge shaft in the annular groove 11.

[0023] In this embodiment, the flexible transmission member is an anti-bending chain that can move in a straight line when subjected to a thrust.

[0024] A transmission frame 3 is provided at the rear end of the flexible transmission member. The transmission frame includes a front frame arm 4 and a rear frame arm 4 spaced apart from each other. The upper end of the operating handle extends between the front frame arm 5 and the rear frame arm 4, making it easier for the operator to apply force to the operating handle. The transmission frame also includes a left frame arm and a right frame arm connected between the left and right ends of the front and rear frame arms. A left guide shaft is provided on the left side of the left frame arm, and a right guide shaft is provided on the right side of the right frame arm. A guide channel 6 extending in the front-to-back direction is provided on the actuator base. The left and right guide shafts cooperate with the guide channel 6 to guide movement in the front-to-back direction.

[0025] When in use, the operating handle is in the closing position as shown in the figure below. Figure 5 As shown, when the electric actuator is not required to work, the electric actuator cannot affect the normal opening and closing operation of the electrical switch. Figure 6 As shown, the sector drive disc is located at the top of the sector drive slot 23. If a circuit malfunction occurs, the operating handle will jump from the opening position to the tripping position. Figure 5 When the viewing angle swings to the left, the transmission sleeve rotates clockwise, and the torque of the transmission sleeve is transmitted to the output shaft through the planetary gear and the planetary carrier. Figure 6 As shown, the output shaft drives the sector-shaped transmission disc 21 to rotate clockwise to the middle position of the sector-shaped transmission slot 23, that is, the driving motor will not affect the tripping action of the electrical switch; if manual reclosing operation is required, manually pull the operating handle to the opening position, at this time the sector-shaped transmission disc will Figure 6 The viewing angle continues to rotate clockwise to the bottom of the sector drive slot. The drive motor will not affect the operation of the operating handle in the opening direction. The operator can then directly move the operating handle from the opening position to the closing position. At this time, the sector drive disc will rotate counterclockwise from the bottom of the sector drive slot to the top of the sector drive slot. The drive motor will not affect the normal closing process of the operating handle. The drive motor then starts working again, rotating the sector drive disc 21 to the upper end of the sector drive slot 23. This position can be called the waiting position of the electric actuator.

[0026] When the operating handle jumps to the tripping position and the electric operating actuator is required to perform electric opening and closing, the power of the driving motor is transmitted to the planetary gear reduction mechanism through the motor shaft. While the planetary gear reduction mechanism realizes deceleration, the output shaft carries the fan-shaped transmission disc 21 to rotate to the bottom of the fan-shaped transmission groove. Thereafter, the fan-shaped transmission disc 21 cannot continue to rotate clockwise. The power of the planetary gear reduction mechanism is output by the ring gear, and the transmission sleeve can transmit the force to the flexible transmission member. The flexible transmission member moves backward with the transmission frame, thereby pushing the operating handle to the opening position; the driving motor rotates in the opposite direction, and the operating handle can be pulled to the closing position through the flexible transmission member.

[0027] In the present invention, when the electric actuator is not required, the operator can manually apply force to the operating handle without affecting the normal operation of the operating handle by the drive motor; the electric actuator can also electrically drive the operating handle. The front end of the flexible transmission member is wrapped around the transmission sleeve, thereby reducing the front-to-back space of the device and making it suitable for use on small components such as electrical switches.

[0028] 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 electrical switch, comprising an actuator base, characterized in that: A drive motor is provided at the left end of the actuator base, and a planetary gear reduction mechanism is connected to the drive motor. The planetary gear reduction mechanism includes a sun gear and a transmission sleeve with a right-end rotating sleeve connected to the periphery of the drive motor. A gear ring is provided on the inner side of the left end of the transmission sleeve, and the sun gear and the gear ring are connected through a planetary gear transmission. The planetary gear reduction mechanism also includes an output shaft connected to the planetary gear, and the sun gear is transmission-connected to the motor shaft of the drive motor. A locking plate is fixed at the left end of the actuator base, and a fan-shaped transmission plate is fixed on the output shaft. The locking plate is provided with a fan-shaped transmission groove that cooperates with the fan-shaped transmission plate. The circumferential end walls of the fan-shaped transmission groove are respectively arranged opposite to the circumferential end ends of the fan-shaped transmission plate. The central angle of the fan-shaped transmission groove is greater than the central angle of the fan-shaped transmission plate. A flexible transmission member with a rear end connected to the operating handle to transmit push-pull force to the operating handle is wrapped around the middle of the transmission sleeve.

2. The electrically operated actuator according to claim 1, characterized in that: An annular groove is provided in the middle of the transmission sleeve, and the annular groove is located between the motor housing of the drive motor and the planetary gear. The front end of the flexible transmission member is wound in the annular groove.

3. The electrically operated actuator according to claim 1, characterized in that: The flexible transmission member is a chain or a transmission belt.

4. The electrically operated actuator according to claim 1, characterized in that: The actuator base includes a left base side plate and a right base side plate that are spaced apart from each other. The right end of the motor housing of the drive motor is fixed to the right base side plate, and the locking plate is fixed to the left base side plate.

5. 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 disc.

6. The electrically operated actuator according to any one of claims 1 to 6, characterized in that: A transmission frame is provided at the rear end of the flexible transmission member. The transmission frame includes a front frame arm and a right frame arm which are spaced apart from each other. The upper end of the operating handle passes through between the front frame arm and the rear frame arm.

7. The electrically operated actuator according to claim 6, characterized in that: A guide channel extending along the front-back direction is provided on the actuator base, and the left and right ends of the transmission frame are guided and moved in cooperation with the guide channel.

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