Electric operating mechanism

Abstract

The invention relates to an electric operating mechanism, which comprises a mechanism frame, a grounding operating shaft, an isolation operating shaft, an electric driving assembly and two transmission assemblies, and is characterized in that the electric driving assembly comprises a supporting plate, a motor, a driving gear, a screw rod, a transmission gear and a planet shaft; the two sets of transmission assemblies comprise two opening and closing driving plates, two sets of energy storage spring assemblies, two stirring plates and reset tension springs arranged between the two stirring plates and the mechanism frame, and the two opening and closing driving plates are provided with two transmission shafts matched with the two stirring plates correspondingly. Two arc-shaped shifting holes matched with the two transmission shafts are formed in the two shifting plates, the two transmission shafts are inserted into the two arc-shaped shifting holes in a penetrating mode, and linkage matching of the two opening and closing driving plates and the two shifting plates is formed. The vacuum circuit breaker has the advantages of simple structure, stable and reliable performance, safety, reliability, small size and rapid opening and closing.

Description

Technical Field

[0001] The invention relates to an operating mechanism, in particular to an electric operating mechanism. Background Art

[0002] The five-protection interlocking operating mechanism is widely used in power equipment such as high-voltage switchgear and ring network cabinets to ensure that no misoperation occurs during various operations, ensuring the safe operation of the power system and the safety of personnel. The five-protection functions mainly include: 1. Preventing the circuit breaker from being opened or closed by mistake: ensuring that the circuit breaker can only be opened or closed in the correct state to avoid equipment damage or safety accidents caused by misoperation. 2. Preventing the disconnector from opening or closing with load: before operating the disconnector, it is necessary to ensure that the circuit breaker is in the open state to avoid operating with load. 3. Preventing the grounding wire (grounding switch) from being hung (closed) with power on: before the grounding switch is closed, it is necessary to ensure that the equipment is in a power-off state to avoid operating with power on. 4. Preventing the grounding wire (grounding switch) from being closed and energized: ensuring that the circuit breaker cannot be closed and energized when the grounding switch is in the closed state to avoid the equipment being grounded with power on. 5. Preventing the accidental entry into the live interval: when the equipment is energized, prevent personnel from accidentally entering the dangerous area to ensure personnel safety. With the rapid development of my country's national economy, modern society has higher and higher requirements for power supply. The development of UHV power grid and the construction of economic, safe, efficient and clean intelligent power grid have become the development trend of power grid. Most of the existing five-protection interlocking operating mechanisms are manually operated and do not have electric operation functions. In addition, the existing five-protection interlocking operating mechanisms also have the defects of complex structural design, slow opening and closing speed, unreliable performance and large size. Summary of the invention

[0003] The purpose of the present invention is to overcome the defects of the prior art and provide an electric operating mechanism with simple structure, stable and reliable performance, safety and reliability, small size and rapid opening and closing.

[0004] To achieve the above-mentioned purpose, the present invention adopts an electric operating mechanism, including a mechanism frame, a grounding operating shaft, an isolation operating shaft, an electric drive assembly arranged on the mechanism frame, and two sets of transmission assemblies arranged on the mechanism frame and used to drive the isolation operating shaft and the grounding operating shaft to respectively perform opening and closing actions. The electric drive assembly includes a support plate arranged on the mechanism frame, a motor arranged on the support plate, a driving gear arranged on the output shaft of the motor, a screw rod rotatably arranged on the support plate, a transmission gear arranged on the screw rod and meshing with the driving gear, and a planetary shaft arranged on the screw rod. The two sets of transmission assemblies include a gear respectively arranged in linkage with each other. Two separation and combination drive plates on the isolation operating shaft and the grounding operating shaft, two groups of energy storage spring assemblies respectively arranged between the two separation and combination drive plates and the mechanism frame, two toggle plates respectively rotatably arranged on the isolation operating shaft and the grounding operating shaft and linked with the planetary shaft, and a reset tension spring arranged between the two toggle plates and the mechanism frame, the two separation and combination drive plates are respectively provided with two transmission shafts matched with the two toggle plates, the two toggle plates are provided with two arc-shaped toggle holes matched with the two transmission shafts, the two transmission shafts are inserted in the two arc-shaped toggle holes, and constitute the linkage cooperation between the two separation and combination drive plates and the two toggle plates.

[0005] The beneficial effects of the above structure are: the electric drive assembly adopts a screw and planetary shaft transmission structure design, the structure design is simple, the volume is small, the modular structure design is adopted, it is easy to maintain and adjust, the transmission is smoother, the screw drive has high positioning accuracy and repeated positioning accuracy, the conversion efficiency is high, it can effectively convert the rotational motion into linear motion, it can withstand a large load, and it has a long service life. During operation, the motor drives the transmission gear to rotate through the driving gear, and the transmission gear drives the screw to rotate. The screw drives the two toggle plates to move through the planetary shaft, and the two toggle plates drive the two separation and closing drive plates to move respectively. The two separation and closing drive plates drive the isolation operating shaft and the grounding operating shaft to perform the separation and closing action, and the energy storage spring assembly can accelerate the two separation and closing drive plates to perform the separation and closing action, and the separation and closing speed is faster. Therefore, the electric operating mechanism has the advantages of simple structure, stable and reliable performance, safety and reliability, small size, and rapid separation and closing.

[0006] In particular, the two toggle plates are respectively provided with two trigger bolts in linkage, the mechanism frame is provided with two arc-shaped guide holes through which the two trigger bolts can pass, the mechanism frame is respectively provided with two first micro switches at one end corresponding to the two arc-shaped guide holes, the two trigger bolts move with the two toggle plates and trigger the two first micro switches, and realize the connection or disconnection of the two first micro switches, the mechanism frame is provided with a trigger plate that is rotatably coordinated with the two trigger bolts at the other end corresponding to the two arc-shaped guide holes, the mechanism frame is provided with two second micro switches that cooperate with the trigger plate, the trigger plate moves with the two trigger bolts and triggers the two second micro switches, and realizes the connection or disconnection of the two second micro switches. The two toggle plates trigger the two first micro switches and the two second micro switches through the trigger bolts, thereby ensuring that the two toggle plates can reliably perform the opening and closing actions, which is beneficial to improving the working reliability of the electric operating mechanism.

[0007] In particular, the mechanism frame is provided with a positioning shaft matched with the trigger plate, the trigger plate is rotatably arranged on the positioning shaft, and the two ends of the trigger plate have two trigger arms matched with the two second micro switches, the two trigger arms act on the trigger plate and trigger the two second micro switches, and realize the connection or disconnection of the two second micro switches. The trigger plate is rotatably arranged on the positioning shaft of the mechanism frame, thereby ensuring that the trigger plate can move flexibly, and the trigger plate can reliably trigger the two second micro switches, which is conducive to improving the working reliability of the electric operating mechanism.

[0008] In particular, the isolation operating shaft and the grounding operating shaft are respectively provided with a trigger cam, and the mechanism frame is provided with two position monitoring micro switches corresponding to the isolation operating shaft and the grounding operating shaft. The two trigger cams move with the isolation operating shaft and the grounding operating shaft and trigger the two position monitoring micro switches respectively, and realize the connection or disconnection of the two position monitoring micro switches. The two position monitoring micro switches can monitor the working positions of the isolation operating shaft and the grounding operating shaft, thereby ensuring that the isolation operating shaft and the grounding operating shaft can be reliably opened and closed, which is conducive to improving the working reliability of the electric operating mechanism.

[0009] In particular, guide sleeves are rotatably arranged on both ends of the planetary shaft, and guide holes matching the guide sleeves are arranged on the mechanism frame, and the guide sleeves are inserted into the guide holes to form a sliding connection between the guide sleeves and the mechanism frame. The guide sleeves of the planetary shafts are slidably arranged in the guide holes of the mechanism frame, thereby ensuring that the planetary shafts can move reliably, which is beneficial to improving the working reliability of the electric operating mechanism.

[0010] In particular, the two toggle plates are provided with toggle blocks matched with the guide sleeves, and toggle arc surfaces matched with the guide sleeves are respectively arranged on both sides of the toggle blocks of the two toggle plates. The guide sleeves move with the planetary shafts and abut against the toggle arc surfaces, and form a linkage match between the two toggle plates and the guide sleeves. The toggle blocks of the toggle plates match with the guide sleeves through the toggle arc surfaces, thereby ensuring that the guide sleeves can reliably drive the toggle plates to move, which is beneficial to improving the working reliability of the electric operating mechanism.

[0011] In particular, two micro switches for controlling the on and off of the motor power supply are respectively arranged on both sides of the corresponding planetary shaft on the mechanism frame, and one end of the planetary shaft has a trigger part that cooperates with the two micro switches. The trigger part moves with the planetary shaft and triggers the two micro switches respectively to achieve the on or off of the two micro switches. The position of the planetary shaft is monitored by the two micro switches, so that the planetary shaft can be reliably moved, and the electric operating mechanism can reliably perform the opening and closing actions, and the working reliability is higher.

[0012] In particular, the energy storage spring assembly includes a first spring seat connected to the split-and-close drive plate, a second spring seat rotatably arranged on a limit bolt of a mechanism frame, and an energy storage spring arranged between the first spring seat and the second spring seat, wherein the first spring seat is provided with a guide groove, and one end of the second spring seat has a guide portion matched with the guide groove, the guide portion is inserted into the guide groove, and constitutes a sliding connection between the first spring seat and the second spring seat. The energy storage spring assembly can accelerate the two split-and-close drive plates to perform the split-and-close action, and the split-and-close speed is faster, and the energy storage spring assembly adopts a modular structure design, thereby facilitating the assembly of the energy storage spring assembly with the mechanism frame and the split-and-close drive plate, and the assembly efficiency is higher.

[0013] In particular, the support plate is provided with a dust cover covering the driving gear and the transmission gear. The dust cover can prevent debris and dust from falling into the driving gear and the transmission gear, thereby providing better protection performance and higher working reliability. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 This is a stereoscopic diagram from the first viewing angle of an embodiment of the present invention.

[0015] Figure 2 This is a stereoscopic diagram from a second viewing angle of an embodiment of the present invention.

[0016] Figure 3 This is an exploded view of an embodiment of the present invention.

[0017] Figure 4 Detailed description of the invention The figure is an exploded view of the energy storage spring assembly according to an embodiment of the present invention. DETAILED DESCRIPTION

[0018] like Figures 1 to 4As shown, the embodiment of the present invention is an electric operating mechanism, including a mechanism frame 10, a grounding operating shaft 11, an isolation operating shaft 12, an electric drive assembly 20 arranged on the mechanism frame 10, and two sets of transmission assemblies 30 arranged on the mechanism frame 10 and used to drive the isolation operating shaft 12 and the grounding operating shaft 11 to respectively perform opening and closing actions. The electric drive assembly 20 includes a support plate 21 arranged on the mechanism frame 10, a motor 22 arranged on the support plate 21, a driving gear 23 arranged on the output shaft of the motor 22, a screw rod 24 rotatably arranged on the support plate 21, a transmission gear 25 arranged on the screw rod 24 and meshing with the driving gear 23, and a planetary shaft 26 arranged on the screw rod 24. The two sets of transmission assemblies 30 include respectively linked and arranged on the isolation operating shaft 11, and a transmission gear 25 meshing with the driving gear 23. Two separation and combination drive plates 31 on the isolation operating shaft 12 and the grounding operating shaft 11, two groups of energy storage spring assemblies 32 respectively arranged between the two separation and combination drive plates 31 and the mechanism frame 10, two toggle plates 33 respectively rotatably arranged on the isolation operating shaft 12 and the grounding operating shaft 11 and linked with the planetary shaft 26, and a reset tension spring 34 arranged between the two toggle plates 33 and the mechanism frame 10, the two separation and combination drive plates 31 are respectively provided with two transmission shafts 311 matched with the two toggle plates 33, the two toggle plates 33 are provided with two arc-shaped toggle holes 331 matched with the two transmission shafts 311, the two transmission shafts 311 are inserted in the two arc-shaped toggle holes 331, and constitute the linkage cooperation between the two separation and combination drive plates 31 and the two toggle plates 33. The two toggle plates 33 are respectively provided with two trigger bolts 332 in linkage, the mechanism frame 10 is provided with two arc guide holes 101 through which the two trigger bolts 332 can pass, two first micro switches 35 are respectively provided at one end of the mechanism frame 10 corresponding to the two arc guide holes 101, the two trigger bolts 332 move with the two toggle plates 33 and trigger the two first micro switches 35, and realize the connection or disconnection of the two first micro switches 35, a trigger plate 36 that is rotatably provided at the other end of the mechanism frame 10 corresponding to the two arc guide holes 101 and is linked with the two trigger bolts 332, and two second micro switches 37 that cooperate with the trigger plate 36 are provided on the mechanism frame 10, the trigger plate 36 moves with the two trigger bolts 332 and triggers the two second micro switches 37, and realizes the connection or disconnection of the two second micro switches 37. The two toggle plates trigger the two first micro switches and the two second micro switches through the trigger bolts, thereby ensuring that the two toggle plates can reliably perform the opening and closing actions, which is beneficial to improving the working reliability of the electric operating mechanism.The mechanism frame 10 is provided with a positioning shaft 102 matched with the trigger plate 36. The trigger plate 36 is rotatably arranged on the positioning shaft 102. The trigger plate 36 has two trigger arms 361 matched with the two second micro switches 37 at both ends. The two trigger arms 361 act on the trigger plate 36 and trigger the two second micro switches 37, and realize the connection or disconnection of the two second micro switches 37. The trigger plate is rotatably arranged on the positioning shaft of the mechanism frame, so as to ensure that the trigger plate can move flexibly, and the trigger plate can reliably trigger the two second micro switches, which is conducive to improving the working reliability of the electric operating mechanism. The isolation operation shaft 12 and the grounding operation shaft 11 are respectively provided with a trigger cam 100. The mechanism frame 10 is provided with two position monitoring micro switches 13 corresponding to the isolation operation shaft 12 and the grounding operation shaft 11. The two trigger cams 100 act with the isolation operation shaft 12 and the grounding operation shaft 11 and respectively trigger the two position monitoring micro switches 13, and realize the connection or disconnection of the two position monitoring micro switches 13. The two position monitoring micro switches can monitor the working positions of the isolation operating shaft and the grounding operating shaft, thereby ensuring that the isolation operating shaft and the grounding operating shaft can be reliably opened and closed, which is beneficial to improving the working reliability of the electric operating mechanism.

[0019] like Figure 1 and 3As shown, guide sleeves 27 are rotatably arranged on both ends of the planetary shaft 26, and guide holes 103 matching the guide sleeves 27 are arranged on the mechanism frame 10. The guide sleeves 27 are inserted into the guide holes 103, and form a sliding connection between the guide sleeves 27 and the mechanism frame 10. The guide sleeves of the planetary shaft are slidably arranged in the guide holes of the mechanism frame, so as to ensure that the planetary shaft can move reliably, which is beneficial to improving the working reliability of the electric operating mechanism. The two toggle plates 33 are provided with toggle blocks 333 matching the guide sleeves 27, and toggle arc surfaces 3331 matching the guide sleeves 27 are respectively arranged on both sides of the toggle blocks 333 of the two toggle plates 33. The guide sleeves 27 move with the planetary shaft 26 and abut against the toggle arc surfaces 3331, and form a linkage connection between the two toggle plates 33 and the guide sleeves 27. The toggle block of the toggle plate cooperates with the guide sleeve through the toggle arc surface, so as to ensure that the guide sleeve can reliably drive the toggle plate to move, which is conducive to improving the working reliability of the electric operating mechanism. Two micro switches 28 for controlling the power on and off of the motor 22 are respectively arranged on the corresponding two sides of the planetary shaft 26 on the mechanism frame 10. One end of the planetary shaft 26 has a trigger part 261 that cooperates with the two micro switches 28. The trigger part 261 moves with the planetary shaft 26 and triggers the two micro switches 28 respectively to realize the connection or disconnection of the two micro switches 28. The position of the planetary shaft is monitored by the two micro switches, so as to ensure that the planetary shaft can move reliably and the electric operating mechanism can reliably perform the opening and closing action, and the working reliability is higher. The support plate 21 is provided with a dust cover 29 covering the drive gear 23 and the transmission gear 25. The dust cover can prevent debris and dust from falling into the drive gear and the transmission gear, and the protection performance is better and the working reliability is higher.

[0020] like Figure 3 and 4 As shown, the energy storage spring assembly 32 includes a first spring seat 321 connected to the split-and-close drive plate 31, a second spring seat 322 rotatably arranged on the limit bolt 104 of the mechanism frame 10, and an energy storage spring 323 arranged between the first spring seat 321 and the second spring seat 322, wherein the first spring seat 321 is provided with a guide groove 3211, and one end of the second spring seat 322 has a guide portion 3221 matched with the guide groove 3211, and the guide portion 3221 is inserted into the guide groove 3211, and constitutes a sliding connection between the first spring seat 321 and the second spring seat 322. The energy storage spring assembly can accelerate the two split-and-close drive plates to perform the split-and-close action, and the split-and-close speed is faster, and the energy storage spring assembly adopts a modular structure design, so as to facilitate the assembly of the energy storage spring assembly with the mechanism frame and the split-and-close drive plate, and the assembly efficiency is higher.

[0021] The electric drive assembly adopts a screw and planetary shaft transmission structure design, which has a simple structural design, a small size, and a modular structure design, which is easy to maintain and adjust, and has a smoother transmission. The screw drive has high positioning accuracy and repeat positioning accuracy, and has a high conversion efficiency. It can effectively convert rotary motion into linear motion, can withstand large loads, and has a long service life. During operation, the motor drives the transmission gear to rotate through the driving gear, and the transmission gear drives the screw to rotate. The screw drives the two toggle plates through the planetary shaft, and the two toggle plates drive the two separation and closing drive plates to move respectively. The two separation and closing drive plates drive the isolation operating shaft and the grounding operating shaft to perform the separation and closing action, and the energy storage spring assembly can accelerate the two separation and closing drive plates to perform the separation and closing action, and the separation and closing speed is faster. Therefore, the electric operating mechanism has the advantages of simple structure, stable and reliable performance, safety and reliability, small size, and rapid separation and closing.

Claims

1. An electric operating mechanism, characterized in that : It includes a mechanism frame, a grounding operation shaft, an isolation operation shaft, an electric drive assembly arranged on the mechanism frame, and two sets of transmission assemblies arranged on the mechanism frame and used to drive the isolation operation shaft and the grounding operation shaft to respectively perform opening and closing actions. The electric drive assembly includes a support plate arranged on the mechanism frame, a motor arranged on the support plate, a driving gear arranged on the output shaft of the motor, a screw rod rotatably arranged on the support plate, a transmission gear arranged on the screw rod and meshing with the driving gear, and a planetary shaft arranged on the screw rod. The two sets of transmission assemblies include linkages arranged on the isolation operation shaft and the grounding operation shaft, respectively. Two separation and combination drive plates on the shaft, two groups of energy storage spring assemblies respectively arranged between the two separation and combination drive plates and the mechanism frame, two toggle plates respectively rotatably arranged on the isolation operation shaft and the grounding operation shaft and linked with the planetary shaft, and a reset tension spring arranged between the two toggle plates and the mechanism frame, the two separation and combination drive plates are respectively provided with two transmission shafts matched with the two toggle plates, the two toggle plates are provided with two arc-shaped toggle holes matched with the two transmission shafts, the two transmission shafts are inserted in the two arc-shaped toggle holes, and constitute the linkage cooperation between the two separation and combination drive plates and the two toggle plates.

2. The electric operating mechanism according to claim 1, characterized in that: The two toggle plates are respectively provided with two trigger bolts in linkage, the mechanism frame is provided with two arc-shaped guide holes for the two trigger bolts to pass through, two first micro switches are respectively provided at one end of the mechanism frame corresponding to the two arc-shaped guide holes, the two trigger bolts move with the two toggle plates and trigger the two first micro switches, and the two first micro switches are connected or disconnected, a trigger plate that is linked to the two trigger bolts is rotatably provided at the other end of the mechanism frame corresponding to the two arc-shaped guide holes, and two second micro switches that cooperate with the trigger plate are provided on the mechanism frame, the trigger plate moves with the two trigger bolts and triggers the two second micro switches, and the two second micro switches are connected or disconnected.

3. The electric operating mechanism according to claim 2, characterized in that: The mechanism frame is provided with a positioning shaft matched with the trigger plate, the trigger plate is rotatably arranged on the positioning shaft, and the two ends of the trigger plate have two trigger arms matched with the two second micro switches. The two trigger arms act on the trigger plate and trigger the two second micro switches, and realize the connection or disconnection of the two second micro switches.

4. The electric operating mechanism according to claim 1 or 2, characterized in that: A trigger cam is respectively provided on the isolation operating shaft and the grounding operating shaft, and two position monitoring micro switches are provided on the mechanism frame corresponding to the isolation operating shaft and the grounding operating shaft. The two trigger cams move with the isolation operating shaft and the grounding operating shaft and respectively trigger the two position monitoring micro switches, and realize the connection or disconnection of the two position monitoring micro switches.

5. The electric operating mechanism according to claim 1 or 2, characterized in that: Guide sleeves are rotatably arranged on both ends of the planetary shaft, and guide holes matching with the guide sleeves are arranged on the mechanism frame. The guide sleeves are inserted into the guide holes to form a sliding connection between the guide sleeves and the mechanism frame.

6. The electric operating mechanism according to claim 5, characterized in that: The two toggle plates are provided with toggle blocks matched with the guide sleeves, and toggle arc surfaces matched with the guide sleeves are respectively arranged on both sides of the toggle blocks of the two toggle plates. The guide sleeves move with the planetary shafts and abut against the toggle arc surfaces, thereby forming a linkage cooperation between the two toggle plates and the guide sleeves.

7. The electric operating mechanism according to claim 1 or 2, characterized in that: Two micro switches for controlling the on and off of the motor power supply are respectively arranged on both sides of the corresponding planetary shaft on the mechanism frame. One end of the planetary shaft has a trigger part that cooperates with the two micro switches. The trigger part moves with the planetary shaft and triggers the two micro switches respectively to realize the connection or disconnection of the two micro switches.

8. The electric operating mechanism according to claim 1 or 2, characterized in that: The energy storage spring assembly includes a first spring seat connected to the separation and combination drive plate, a second spring seat rotatably arranged on a limit bolt of the mechanism frame, and an energy storage spring arranged between the first spring seat and the second spring seat. The first spring seat is provided with a guide groove, and one end of the second spring seat has a guide portion that matches the guide groove. The guide portion is inserted into the guide groove and constitutes a sliding connection between the first spring seat and the second spring seat.

9. The electric operating mechanism according to claim 1 or 2, characterized in that: The support plate is provided with a dust cover which covers the driving gear and the transmission gear.

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