Small reclosing circuit breaker electric operating mechanism

Abstract

The present invention relates to an electric operating mechanism for a small reclosing circuit breaker, comprising a housing, an electric operating assembly arranged in the housing, the electric operating assembly comprising a handle gear that cooperates with a circuit breaker handle, a closing motor, a gear set arranged between the closing motor and the handle gear, an opening motor, an opening toggle gear that cooperates with the opening motor, a lever that cooperates with the circuit breaker lock shaft, and a reset torsion spring that is arranged between the lever and the housing, the closing motor drives the handle gear through the gear set, and can realize the electric closing of the circuit breaker, the lever cooperates with the opening toggle gear, the lever moves with the opening toggle gear and can toggle the circuit breaker lock shaft, and can realize the electric opening of the circuit breaker. The present invention has the advantages of simple structure, stable and reliable performance, small size, low failure rate, and high safety.

Description

Technical Field

[0001] The invention relates to the technical field of small reclosing circuit breakers, and in particular to an electric operating mechanism of a small reclosing circuit breaker. Background Art

[0002] At present, the opening and closing actions of traditional small circuit breakers need to be completed by manual operation. With the development of smart grids, there is an urgent need for small circuit breaker products that can reliably realize automatic opening and closing. Therefore, an electric operating mechanism that can drive the opening and closing actions of small circuit breakers and is used in conjunction with small circuit breakers has appeared on the market. By sending instructions to this electric operating mechanism, the small circuit breaker can be remotely driven to automatically open and close without manual operation, which effectively saves manpower and material resources and is increasingly widely used. The electric operating mechanism of a small circuit breaker is an accessory for long-distance automatic opening and closing of circuit breakers. The existing electric operating mechanism of a small circuit breaker has a complex structural design, unreliable performance, and a high failure rate. When the circuit fails and needs to be repaired, the handle of the electric operating mechanism may be misoperated by people, posing a safety threat to the maintenance personnel. In order to ensure the personal safety of maintenance personnel, a locking mechanism for locking the handle of the electric operating mechanism is provided on the existing small reclosing circuit breaker, and the locking device of the existing reclosing circuit breaker has many parts and a complex structure, occupies a large space, and causes the overall volume of the electric operating mechanism to be large. Summary of the invention

[0003] The purpose of the present invention is to overcome the defects of the prior art and provide a small electric operating mechanism for a reclosing circuit breaker with simple structure, stable and reliable performance, small size, low failure rate and high safety.

[0004] To achieve the above-mentioned purpose, the present invention adopts an electric operating mechanism of a small reclosing circuit breaker, including a shell and an electric operating component arranged in the shell, wherein the electric operating component includes a handle gear that cooperates with the circuit breaker handle, a closing motor, a gear set arranged between the closing motor and the handle gear, an opening motor, an opening toggle gear that cooperates with the opening motor, a lever that cooperates with the circuit breaker lock shaft, and a reset torsion spring arranged between the lever and the shell, the closing motor drives the handle gear through the gear set and can realize the electric closing of the circuit breaker, the lever cooperates with the opening toggle gear, the lever moves with the opening toggle gear and can toggle the circuit breaker lock shaft, thereby realizing the electric opening of the circuit breaker.

[0005] The beneficial effect of the above structure is that the electric operating mechanism adopts a dual-motor control structure design, and the electric closing and electric opening are controlled by the closing motor and the opening motor respectively, and will not affect each other, which is beneficial to improve the reliability and safety of the electric operating mechanism. When closing, the closing motor starts, and the closing motor drives the handle gear through the gear set, and the handle gear drives the circuit breaker handle to perform the closing action, thereby realizing the electric closing of the electric operating mechanism. When opening, the opening motor starts, the opening motor drives the opening toggle gear, the opening gear toggle the lever, the lever toggle the circuit breaker lock shaft, and the circuit breaker is tripped and opened, thereby realizing the electric opening of the electric operating mechanism. When the user is in arrears or the line fails, the opening toggle gear contacts the lever, the lever contacts the circuit breaker lock shaft, and the circuit breaker is in a tripped and locked state, so that the circuit breaker cannot be manually closed.

[0006] In particular, the lever is provided with a limit convex block, the switch-off toggle gear is provided with a toggle convex block matched with the limit convex block, the toggle convex block moves with the switch-off toggle gear and can toggle the limit convex block, and constitutes the linkage cooperation between the switch-off toggle gear and the lever. The switch-off toggle gear is provided with a toggle convex block matched with the limit convex block of the lever, so that the switch-off toggle gear can quickly toggle the lever to move, and the lever toggle the circuit breaker lock shaft to move, which is beneficial to improve the tripping and opening sensitivity of the electric operating mechanism, thereby realizing the rapid tripping and opening of the circuit breaker.

[0007] In particular, the gear set includes a first gear meshed with the worm of the closing motor, a second gear meshed with the first gear, a third gear meshed with the second gear, and a fourth gear meshed with the third gear, and the handle gear meshes with the fourth gear to form a linkage match between the fourth gear and the handle gear. The closing motor drives the handle gear through the gear, which ensures that the transmission between the closing motor and the handle gear is more stable, which is conducive to improving the working reliability of the electric operating mechanism.

[0008] In particular, a pull rod is movably arranged at the position corresponding to the lever on the shell, the pull rod is arranged in the through hole of the shell, and a reset spring is arranged between the pull rod and the shell, a lock hole is arranged on one end of the pull rod, and a convex block extending outside the shell is arranged at one side of the lock hole on one end of the pull rod, a hook body is arranged on the other end of the pull rod, and a matching card slot is arranged at the position corresponding to the hook body on the pull rod, the hook body is engaged in the card slot, and constitutes the linkage cooperation between the pull rod and the pull rod, the pull rod moves with the pull rod and can abut on the circuit breaker lock shaft, and the circuit breaker is locked. During maintenance, the pull rod is pulled, the pull rod drives the pull rod to rotate, the pull rod abuts on the circuit breaker lock shaft, and a padlock can be hung on the lock hole of the pull rod, so that the circuit breaker is in a tripped state and the circuit breaker cannot be closed, which is convenient for maintenance personnel to repair, effectively avoiding safety accidents caused by misoperation, and having higher safety, which is conducive to ensuring the personal safety of maintenance personnel. Furthermore, the pull rod has a simple structural design and a small volume, and will not increase the volume of the entire electric operating mechanism. BRIEF DESCRIPTION OF THE DRAWINGS

[0009] Figure 1 This is a diagram of the internal structure of an embodiment of the present invention.

[0010] Figure 2 This is a structural diagram of the electric closing state of an embodiment of the present invention.

[0011] Figure 3 This is a structural diagram of the locked state of the electric opening switch according to an embodiment of the present invention.

[0012] Figure 4 It is a three-dimensional diagram of an electric operating assembly according to an embodiment of the present invention.

[0013] Figure 5 This is an assembly diagram of the pull rod and the housing according to an embodiment of the present invention. DETAILED DESCRIPTION

[0014] like Figures 1 to 5As shown, the embodiment of the present invention is an electric operating mechanism for a small reclosing circuit breaker, comprising a housing 10, an electric operating assembly 20 arranged in the housing 10, the electric operating assembly 20 comprising a handle gear 21 that cooperates with the circuit breaker handle, a closing motor 22, a gear set 23 arranged between the closing motor 22 and the handle gear 21, an opening motor 24, an opening toggle gear 25 that cooperates with the opening motor 24, a lever 26 that cooperates with the circuit breaker lock shaft 11, and a reset torsion spring arranged between the lever 26 and the housing 10, the closing motor 22 drives the handle gear 21 through the gear set 23, and can realize the electric closing of the circuit breaker, the lever 26 cooperates with the opening toggle gear 25, the lever 26 moves with the opening toggle gear 25 and can toggle the circuit breaker lock shaft 11, and can realize the electric opening of the circuit breaker. The lever 26 is provided with a limit convex block 261, and the opening switch toggle gear 25 is provided with a toggle convex block 251 matched with the limit convex block 261. The toggle convex block 251 moves with the opening switch toggle gear 25 and can toggle the limit convex block 261, and constitutes the linkage cooperation between the opening switch toggle gear 25 and the lever 26. The opening switch toggle gear is provided with a toggle convex block matched with the limit convex block of the toggle rod, so that the opening switch toggle gear can quickly toggle the toggle rod to move, and the toggle rod toggle the circuit breaker lock shaft to move, which is beneficial to improve the tripping and opening sensitivity of the electric operating mechanism, thereby realizing the rapid tripping and opening of the circuit breaker.

[0015] like Figure 4 As shown, the gear set 23 includes a first gear 231 meshing with the worm 221 of the closing motor 22, a second gear 232 meshing with the first gear 231, a third gear 233 meshing with the second gear 232, and a fourth gear 234 meshing with the third gear 233. The handle gear 21 meshes with the fourth gear 234, forming a linkage between the fourth gear 234 and the handle gear 21. The closing motor drives the handle gear through the gear, which ensures that the transmission between the closing motor and the handle gear is more stable, which is conducive to improving the working reliability of the electric operating mechanism. Figure 2 and 5As shown, a pull rod 27 is movably provided on the shell 10 corresponding to the lever 26, and the pull rod 27 is arranged in the through hole 101 of the shell 10, and a return spring 28 is arranged between the pull rod 27 and the shell 10, a locking hole 271 is arranged on one end of the pull rod 27, and a protrusion 272 extending outside the shell 10 is arranged on one side of the locking hole 271 on one end of the pull rod 27, and a hook-shaped body 273 is arranged on the other end of the pull rod 27, and a matching slot 262 is arranged on the lever 26 corresponding to the hook-shaped body 273, and the hook-shaped body 273 is engaged in the slot 262, and constitutes a linkage cooperation between the pull rod 27 and the lever 26, and the lever 26 moves with the pull rod 27 and can contact the circuit breaker locking shaft 11, and realizes the locking of the circuit breaker. During maintenance, the pull rod is pulled, and the pull rod drives the lever to rotate, and the lever contacts the circuit breaker lock shaft, and a padlock can be hung on the lock hole of the pull rod, so that the circuit breaker is in a tripped state and the circuit breaker cannot be closed, which is convenient for maintenance personnel to perform maintenance and effectively avoids safety accidents caused by misoperation. It is safer and is conducive to protecting the personal safety of maintenance personnel. In addition, the pull rod has a simple structural design and a small volume, and will not increase the volume of the entire electric operating mechanism.

[0016] The electric operating mechanism adopts a dual-motor control structure design. The electric closing and electric opening are controlled by the closing motor and the opening motor respectively, and will not affect each other, which is beneficial to improve the reliability and safety of the electric operating mechanism. When closing, the closing motor starts, and the closing motor drives the handle gear through the gear set, and the handle gear drives the circuit breaker handle to perform the closing action, thereby realizing the electric closing of the electric operating mechanism. When opening, the opening motor starts, and the opening motor drives the opening toggle gear, the opening gear toggle the lever, the lever toggle the circuit breaker lock shaft, and the circuit breaker is tripped and opened, thereby realizing the electric opening of the electric operating mechanism. When the user is in arrears or the line fails, the opening toggle gear contacts the lever, the lever contacts the circuit breaker lock shaft, and the circuit breaker is in a tripped and locked state, so that the circuit breaker cannot be manually closed.

Claims

1. A small reclosing circuit breaker electric operating mechanism, comprising a housing and an electric operating assembly arranged in the housing, characterized in that: The electric operation assembly includes a handle gear that cooperates with the circuit breaker handle, a closing motor, a gear set arranged between the closing motor and the handle gear, an opening motor, an opening toggle gear that cooperates with the opening motor, a lever that cooperates with the circuit breaker lock shaft, and a reset torsion spring arranged between the lever and the housing. The closing motor drives the handle gear through the gear set and can realize the electric closing of the circuit breaker. The lever cooperates with the opening toggle gear. The lever moves with the opening toggle gear and can toggle the circuit breaker lock shaft to realize the electric opening of the circuit breaker. Gate; a pull rod is movably provided on the shell corresponding to the lever, the pull rod is arranged in the through hole of the shell, and a return spring is arranged between the pull rod and the shell, a lock hole is arranged on one end of the pull rod, and a protrusion extending outside the shell is arranged on one side of the lock hole corresponding to one end of the pull rod, a hook-shaped body is arranged on the other end of the pull rod, and a matching slot is arranged on the lever corresponding to the hook-shaped body, the hook-shaped body is engaged in the slot, and constitutes a linkage cooperation between the pull rod and the lever, the lever moves with the pull rod and can contact the circuit breaker locking shaft, and realizes the locking of the circuit breaker.

2. The electric operating mechanism of a small reclosing circuit breaker according to claim 1 is characterized in that: The lever is provided with a limit convex block, the switch-opening toggle gear is provided with a toggle convex block matched with the limit convex block, the toggle convex moves with the switch-opening toggle gear and can toggle the limit convex block, and constitutes the linkage cooperation between the switch-opening toggle gear and the lever.

3. The electric operating mechanism of a small reclosing circuit breaker according to claim 1 or 2, characterized in that: The gear set includes a first gear meshed with the worm of the closing motor, a second gear meshed with the first gear, a third gear meshed with the second gear, and a fourth gear meshed with the third gear. The handle gear meshes with the fourth gear, forming a linkage cooperation between the fourth gear and the handle gear.

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