CN212783325U

CN212783325U - Moulded case circuit breaker with electric operating device

Info

Publication number: CN212783325U
Application number: CN202021834700.8U
Authority: CN
Inventors: 郭德鑫; 郑英川; 江华华; 叶名; 洪诗长
Original assignee: Zhejiang Chint Electrics Co Ltd
Current assignee: Zhejiang Chint Electrics Co Ltd
Priority date: 2020-08-28
Filing date: 2020-08-28
Publication date: 2021-03-23
Anticipated expiration: 2030-08-28

Abstract

A molded case circuit breaker with an electric operating device comprises a circuit breaker body and the electric operating device arranged on one side of the circuit breaker body, wherein the electric operating device comprises a motor, a transmission assembly, a main shaft and a driving assembly, and the driving assembly comprises a cam, a roller connected with an eccentric rod of the cam, a sliding block matched with the roller and a guide rod connected with the sliding block in a sliding manner; the main shaft is connected with the cam and is used for driving the cam to rotate, the motor is connected with the main shaft through the transmission assembly, the main shaft is driven to rotate manually or driven to rotate through the transmission assembly, the main shaft drives the cam to rotate, the rotation of the cam drives the idler wheel to rotate and pushes the sliding block to slide on the guide rod, the sliding block slides and pushes the breaker handle to conduct switching-on and switching-off, and the technical effect that the structure of the driving assembly is simplified and the driving assembly can stably drive the breaker handle to swing is achieved.

Description

Moulded case circuit breaker with electric operating device

Technical Field

The utility model relates to a low-voltage apparatus field especially relates to a moulded case circuit breaker with electrically operated device.

Background

The molded case circuit breaker in the current market can realize manual opening and closing and can also realize automatic opening and closing. The automatic opening and closing is mainly realized by an electric operating device. It is common for an electric operating mechanism to include an indicating device, which is typically a dial having a plurality of indicating areas, each indicating area corresponding to an operating state of the electric operating mechanism. The motor of the existing electric operation device is arranged above the mounting frame, and the structure is complex, so that the height is high. In addition, the slider in the electric operating device can be displaced or separated in the long-time opening and closing process, and the reliability of the product is finally influenced.

Disclosure of Invention

An object of the utility model is to overcome prior art's defect, provide a simple structure, high molded case circuit breaker with electric operating means of reliability.

In order to achieve the above purpose, the utility model adopts the following technical scheme:

a molded case circuit breaker with an electric operating device comprises a circuit breaker body and the electric operating device arranged on one side of the circuit breaker body, wherein the electric operating device comprises a motor, a transmission assembly, a main shaft and a driving assembly which is matched with a circuit breaker handle and drives the circuit breaker handle to swing, and the driving assembly comprises a cam, a roller connected with an eccentric rod of the cam, a sliding block matched with the roller and a guide rod connected with the sliding block in a sliding manner; the roller is inserted into the sliding block and can drive the sliding block to linearly slide along the length direction of the guide rod; the main shaft is connected with the cam and used for driving the cam to rotate, the motor is connected with the main shaft through the transmission assembly, the main shaft is driven to rotate manually or driven to rotate through the transmission assembly, the main shaft drives the cam to rotate, the rotation of the cam drives the idler wheel to rotate and pushes the sliding block to slide on the guide rod, and the sliding block slides and pushes the handle of the circuit breaker to perform switching-on and switching-off.

Preferably, the electric operating device comprises a mounting rack and a supporting plate, the mounting rack comprises a first support and a second support which are arranged at intervals in a stacking mode, a first cavity is formed between the first support and the second support, the supporting plate is installed above the mounting rack, a second cavity is formed between the mounting rack and the supporting plate, the transmission assembly is arranged in the second cavity, the driving assembly is arranged in the first cavity, the transmission assembly and the driving assembly are arranged in a stacking mode, the motor is arranged on one side of the transmission assembly and one side of the driving assembly, a rotating shaft of the motor is parallel to the stacking direction of the transmission assembly and the driving assembly, and the motor is installed in the first cavity and connected with the transmission assembly when the rotating shaft of the motor extends.

Preferably, set up the center slot that links to each other with the main shaft on the cam, the cam passes through center slot and main shaft reciprocal anchorage, and the guide bar is total two and parallel horizontal connection is in order to fix on the mounting bracket, and the sliding block slides with two guide bars and is connected in order can be along the length square horizontal slip on the guide bar of guide bar, and the bottom of sliding block is equipped with and the circuit breaker handle complex driving groove, can stir the circuit breaker handle swing.

Preferably, the main shaft penetrates through the supporting plate and the second support, one end of the main shaft is connected with the cam in the first cavity, the middle of the main shaft is in clutch connection with the transmission assembly in the second cavity, the other end of the main shaft extends out of the upper portion of the supporting plate, and the end portion of the main shaft is provided with a driving hole used for manual driving.

Preferably, the position department that the sliding block corresponds the gyro wheel below has seted up and has supplied the gyro wheel to insert the spacing groove, the both sides that the sliding block corresponds the spacing groove are provided with first limiting plate and the second limiting plate that can paste mutually with the gyro wheel respectively.

Preferably, the side wall surface of the first limiting plate, which is close to the roller, is a long-strip-shaped limiting plane, and when the opening operation is performed, the roller rotates and is attached to the limiting plane; the side wall surface of the second limiting plate, which is close to the roller, is a limiting arc surface, when the switch-on action is carried out, the roller rotates and is attached to the limiting arc surface, and the roller slides in and slides out of the limiting groove from the limiting arc surface during matching.

Preferably, a first matching plate, a second matching plate and a third matching plate which are in sliding fit with the guide rod are arranged on the two sides of the sliding block; the first matching plate, the second matching plate and the third matching plate are arranged at intervals along the length direction of the guide rod, the second matching plate is positioned between the first matching plate and the third matching plate, and the first matching plate and the third matching plate are arranged at the same height and are positioned above the second matching plate; the first matching plate, the second matching plate and the third matching plate are combined to form a sliding groove matched with the guide rod in a sliding mode.

Preferably, the transmission assembly comprises a driving gear and at least one transmission gear connected between the driving gear and the motor; the driving gear is coaxially arranged with the main shaft, driving teeth are arranged on the periphery of the driving gear, a through hole connected with the main shaft is formed in the center of the driving gear, a gear arc surface is arranged on the inner wall of the through hole and is coaxially arranged with the main shaft, one side of the gear arc surface extends outwards to form a gear concave surface in arc transition with the gear arc surface, a gap is formed between the gear concave surface and the main shaft, a gear blocking surface perpendicular to the inner wall surface of the gear arc surface is arranged on one side, away from the gear arc surface, of the gear concave surface, and the gear arc surface, the gear concave surface and the gear blocking surface are arranged in two groups and are arranged in central symmetry along the axis; a counter bore is formed in the side wall of the main shaft and penetrates through the main shaft, a pressure spring is arranged in the counter bore, and two ends of the pressure spring are connected with clutch shafts which can extend out of the counter bore; the main shaft penetrates through the through hole, the clutch shaft corresponds to the inner wall of the through hole, and when the driving gear rotates towards one side, the clutch shaft can be attached to the gear blocking surface, so that the driving gear and the main shaft are combined with each other to drive the main shaft to rotate; when the main shaft rotates clockwise, the clutch shaft cannot be attached to the side wall of the gear blocking surface, so that the driving gear and the main shaft are separated from each other, and clutch connection between the driving gear and the main shaft is realized.

Preferably, the electric operating device further comprises a circuit board, a closing microswitch and an opening microswitch, wherein the circuit board is electrically connected with the motor, the circuit board is arranged above the supporting plate, the motor is connected with the control unit on the circuit board, the closing microswitch and the opening microswitch are connected with the control unit on the circuit board, and the closing microswitch and the opening microswitch are arranged on the circuit board; the top of main shaft is equipped with the indicator panel with the coaxial setting of main shaft, the indicator panel becomes the cam structure, and the indicator panel provides the circuit breaker signal of closing a floodgate or separating brake with closing a floodgate micro-gap switch and separating brake micro-gap switch when rotating along with the main shaft.

Preferably, the electric operating device further comprises a lock device, wherein the lock device is provided with a limiting part used for limiting a sliding block and used for locking the sliding block to enable the circuit breaker to be switched on or switched off at will.

Preferably, the electric operating device further comprises a face cover covering the mounting frame and the supporting plate, a rocker mounting groove is formed in the face cover, and a rocker capable of being inserted into the driving hole of the spindle is inserted into the rocker mounting groove.

Preferably, the electric operating device further comprises a manual and automatic push rod which is connected with the electric operating device in a sliding mode and used for switching between a manual operating mode and an electric operating mode, when the manual and automatic push rod is manually shifted to one side, the automatic push rod does not shield the spindle, meanwhile, a manual and automatic switching microswitch is driven to enable the electric operating device to be incapable of working, and the manual and automatic switching microswitch is connected in a driving circuit of the motor.

The electric operating device in the plastic case circuit breaker with the electric operating device has stable and simple structure, the driving component comprises a cam, a roller connected with an eccentric rod of the cam, a sliding block matched with the roller and a guide rod connected with the sliding block in a sliding way, and the sliding block is matched with a handle of the circuit breaker; the main shaft is connected with the cam and is connected with the electric operating device, the main shaft is driven to rotate manually or the motor drives the main shaft to rotate through the transmission assembly, the cam drives the idler wheel to rotate and pushes the sliding block to slide on the guide rod, the sliding block drives the breaker handle to swing so as to achieve switching-on and switching-off, the main shaft, the cam and the sliding block are simple and reliable in transmission matching, and the service life of a product is prolonged.

Particularly, the transmission assembly and the driving assembly of the electric operating device are arranged in a stacked mode, the motor is arranged on one side of the transmission assembly and the driving assembly, and the electric operating device and the circuit breaker can be integrated due to the fact that the height is reduced.

In addition, the first matching plate, the second matching plate and the third matching plate are combined to form a sliding groove matched with the guide rod in a sliding mode, and the guide rod is connected in the sliding groove in a sliding mode so as to be capable of sliding along the guide rod. And because first cooperation board, second cooperation board and third cooperation board interval set up, the guide bar can be installed in the sliding tray more conveniently.

In addition, when the driving gear rotates clockwise, the clutch shaft starts to move along the tracks of the circular arc surface of the gear, the concave surface of the gear and the gear blocking surface in sequence, the clutch shaft extends out under the action of the spring and can abut against the gear blocking surface, and the driving gear is combined with the main shaft, so that the driving gear can drive the main shaft to rotate clockwise; when the main shaft rotates clockwise, the clutch shaft starts to move along the tracks of the gear blocking surface, the gear concave surface and the gear arc surface in sequence, the clutch shaft cannot be attached to the side wall of the gear blocking surface, and the driving gear and the main shaft are separated from each other, so that the main shaft cannot drive the driving gear to rotate clockwise.

Drawings

Fig. 1 is a schematic view of the overall structure of the molded case circuit breaker of the present invention;

fig. 2 is a schematic view of a partial sectional structure of the molded case circuit breaker of the present invention;

fig. 3 is a schematic structural view of the surface cover and the electric operating shell of the molded case circuit breaker of the present invention;

FIG. 4 is a schematic structural view of the electric operation device of the present invention;

fig. 5 is a schematic view of the cam structure of the present invention;

fig. 6 is a schematic structural view of the sliding block of the present invention;

FIG. 7 is a schematic view of the transmission assembly of the present invention;

fig. 8 is a schematic structural view of the driving gear of the present invention;

fig. 9 is a schematic view of the main shaft explosion structure of the present invention.

In the figure: 1. a circuit breaker body; 2. a circuit breaker middle cover; 3. an electrically operated device; 31. a motor; 32. a transmission assembly; 321. a first gear; 322. a second gear; 323. a third gear; 324. a fourth gear; 325. A drive gear; 3251. a through hole; 3252. a gear arc surface; 3253. a gear concave surface; 3254. a gear stop surface; 33. a main shaft; 331. a pressure spring; 332. a clutch shaft; 333. an indicator panel; 34. a drive assembly; 341. A cam; 3411. a central slot; 342. a roller; 343. a slider; 3431. a limiting groove; 3432. a first limit plate; 3433. a second limiting plate; 3434. a limiting plane; 3435. limiting the arc surface; 3436. a first mating plate; 3437. a second mating plate; 3438. a third mating plate; 3439. a sliding groove; 344. a guide bar; 35. a circuit breaker handle; 36. a mounting frame; 361. a first cavity; 362. a first bracket; 363. a second bracket; 37. a support plate; 371. a second cavity; 38. a face cover; 381. a key handle; 382. character identification; 383. an indicator light; 384. a manual and automatic push rod; 39. an electrically operated housing; 4. a lock device.

Detailed Description

The following describes the specific embodiment of the molded case circuit breaker with an electric operating device according to the present invention with reference to the embodiments shown in fig. 1 to 9. The molded case circuit breaker with the electrically operated device of the present invention is not limited to the description of the following embodiments.

A molded case circuit breaker with an electric operation device includes a circuit breaker body 1 and an electric operation device 3 provided on one side of the circuit breaker body 1. The electric operating device 3 comprises a motor 31, a transmission assembly 32, a main shaft 33 and a driving assembly 34 which is matched with a breaker handle 35 and drives the breaker handle 35 to swing; the driving assembly 34 includes a cam 341, a roller 342 connected to an eccentric rod of the cam 341, a sliding block 343 engaged with the roller 342, and a guide rod 344 slidably connected to the sliding block 343. The sliding block 343 is matched with the breaker handle 35, the sliding block can drive the breaker handle 35 to swing when sliding, the roller 342 is inserted into the sliding block 343 and can drive the sliding block 343 to linearly slide along the length direction of the guide rod 344, the main shaft 33 is connected with the cam 341 and is used for driving the cam 341 to rotate, the motor 31 is connected with the main shaft 33 through the transmission assembly 32, the main shaft 33 is manually driven to rotate or the motor 31 drives the main shaft 33 to rotate through the transmission assembly 32, the main shaft 33 drives the cam 341 to rotate, the cam 341 drives the roller 342 to rotate and pushes the sliding block 343 to slide on the guide rod 344, and the sliding block 343 drives the breaker handle 35 to swing so as to realize closing and.

As shown in fig. 1-4, a molded case circuit breaker with an electric operating device comprises a circuit breaker body 1 and an electric operating device 3 arranged on one side of the circuit breaker body 1, wherein the circuit breaker body 1 comprises a circuit breaker base and a circuit breaker middle cover 2 arranged on the circuit breaker base, one end of a circuit breaker handle 35 extends out of the circuit breaker middle cover 2, and the electric operating device 3 is arranged on the circuit breaker middle cover 2.

The circuit breaker comprises a circuit breaker body 1 and is characterized in that a moving contact, a fixed contact and an operating mechanism connected with the moving contact can be arranged in the circuit breaker body 1, a circuit breaker handle 35 is connected with the operating mechanism, and related components such as an undervoltage component, an overload component and a short-circuit component are further arranged to complete the protection functions of undervoltage, overload and short-circuit, and the operating mechanism is triggered to release when a fault occurs to realize the automatic tripping and tripping of the circuit breaker.

As shown in fig. 1 to 4, the electric operation device 3 includes a housing member, and a motor 31, a transmission assembly 32, a main shaft 33, and a drive assembly 34 provided in the housing member. The housing member includes a mounting bracket 36, a support plate 37, an electric operating housing 39 provided outside the mounting bracket 36 and the support plate 37, and a cover 38 covering the electric operating housing 39.

The mounting bracket 36 includes first support 362 and second support 363 that the interval range upon range of setting, forms first cavity 361 between first support 362 and the second support 363, and backup pad 37 is installed in mounting bracket 36 top, forms second cavity 371 between mounting bracket 36 and the backup pad 37, drive assembly 32 locates in second cavity 371, drive assembly 34 locates in first cavity 361, and drive assembly 32 and the range upon range of setting of drive assembly 34, and motor 31 sets up the one side at drive assembly 32 and drive assembly 34, and motor 31's pivot is on a parallel with the range upon range of orientation setting of drive assembly 32 and drive assembly 34, and motor 31 installs in first cavity 361 and its pivot is connected with drive assembly 32 in stretching to second cavity 371. The first bracket 362 and the second bracket 363 are both U-shaped, and a side wall of the U-shaped first bracket 362 and a side wall of the U-shaped second bracket 363 are oppositely and correspondingly connected to form a first cavity 361 for accommodating the driving assembly 34. The supporting plate 37 and the second holder 363 are connected to each other by a plurality of supporting columns. In order to reduce the overall height of the electric operating device 3, the motor 31 is disposed in the first cavity 361 and at one side of the guide rod 344, and the transmission assembly is disposed in the second cavity 371, so that the overall height of the electric operating device 3 is not increased due to the height of the motor 31.

The transmission assembly 32 is connected with the motor 31 and the main shaft 33, the motor 31 drives the main shaft 33 to rotate, and the driving assembly 34 is connected with the breaker handle 35 and the main shaft 33 and is driven by the main shaft 33 to drive the breaker handle 35 to swing. The main shaft 33 passes through the supporting plate 37 and the second bracket 363, one end of the main shaft 33 is connected with the cam 341 in the first cavity 361, the middle part of the main shaft is in clutch connection with the transmission component 32 in the second cavity 371, the other end of the main shaft 33 extends out of the upper part of the supporting plate 37, the end part of the main shaft 33 is provided with a driving hole for manual driving, and the top of the main shaft 33 is also provided with an indicating plate 333 which is coaxial with the main shaft 33.

The electric operating device 3 is used for driving the circuit breaker handle 35 to perform switching on and switching off operations on the molded case circuit breaker in an electric operating mode, a user can also insert the rocker into a driving hole connected with the main shaft 33, the main shaft 33 is driven manually to rotate, the circuit breaker handle 35 is driven to perform switching on and switching off operations on the molded case circuit breaker in a manual operating mode, and electric switching on and switching off and manual switching on and switching off can be achieved.

The utility model discloses a moulded case circuit breaker with electric operating means, the range upon range of setting of electric operating means's drive assembly 32 and drive assembly 34, motor 31 sets up in one side of drive assembly 32 and drive assembly 34, and the high reduction can realize electric operating means and circuit breaker integration, and the transmission cooperation of main shaft 33, cam 341 and sliding block 343 is simple, and electric operating means can divide-shut brake circuit breaker for a long time, improves the life of product.

The electric operating device 3 further comprises a circuit board, a closing microswitch and an opening microswitch which are electrically connected with the motor 31, the preferred circuit board is arranged above the supporting plate 37, the motor 31 is connected with a control unit on the circuit board, the closing microswitch and the opening microswitch are connected with the control unit on the circuit board, the closing microswitch and the opening microswitch can be installed on the circuit board, and the control unit comprises a microcontroller MCU or a single chip microcomputer. The indicating plate 333 is arranged on the top of the main shaft 33 and is coaxial with the main shaft 33, the indicating plate 333 is of a cam structure, the closing microswitch and the opening microswitch are matched and oppositely arranged on two sides of the indicating plate 333, and the indicating plate 333 rotates along with the main shaft 33 and provides an electric signal for closing or opening of the circuit breaker with the closing microswitch and the opening microswitch. As another embodiment, the closing and opening micro-switches may also be engaged with the sliding block 343 or the cam 341.

The working process of the breaker opening and closing is as follows: when the circuit breaker is in an opening state, the circuit breaker handle 35 is located on one side of the opening at the moment, the control unit of the circuit board sends a closing signal and controls the motor 31 to work, the motor 31 works to drive the transmission assembly 32 to transmit power to the main shaft 33, the main shaft 33 rotates and drives the driving assembly 34 to work, the driving assembly 34 drives the circuit breaker handle 35 to swing towards a closing side, the swing of the circuit breaker handle 35 drives the moving contact to be in contact with the fixed contact through the operating mechanism to achieve closing of the circuit breaker, after the circuit breaker is closed, the protruding side of the indicating plate 333 triggers the closing microswitch, the closing microswitch feeds back a closing state to the control unit on the circuit board, and the control unit of.

When the circuit breaker is in a closing state, the circuit breaker handle 35 is on the closing side at the moment, the control unit of the circuit board sends a switching-off signal and controls the motor 31 to work, the motor 31 works and drives the transmission assembly 32 to transmit power to the main shaft 33, the main shaft 33 rotates and drives the driving assembly 34 to work, the driving assembly 34 drives the circuit breaker handle 35 to swing towards the switching-off side, the swing of the circuit breaker handle 35 drives the moving contact and the static contact to be separated through the operating mechanism to realize the switching-off of the circuit breaker, after the circuit breaker is closed, the protruding side of the indicating plate 333 rotates to trigger the switching-off microswitch, the switching-off microswitch feeds back the switching-off state to the control unit on the circuit board.

As shown in fig. 4-5, the driving assembly 34 is disposed in the first cavity 361, and the driving assembly 34 includes a cam 341, a roller 342, a sliding block 343, and a guide rod 344. The cam 341 is provided with a center groove 3411 connected with the main shaft 33, the cam 341 is fixed with the main shaft 33 through the center groove 3411, and an eccentric shaft thereof is connected with the roller 342. The guide rods 344 are two in total and are horizontally connected to the mounting frame 36 side by side for fixing, the sliding block 343 is connected with the two guide rods 344 in a sliding manner so as to be capable of horizontally sliding on the guide rods 344 along the length direction of the guide rods 344, and the bottom of the sliding block 343 is provided with a driving groove matched with the breaker handle 35 and is capable of shifting the breaker handle 35 to swing. When the main shaft 33 rotates, the cam 341 is driven to rotate, the cam 341 drives the roller 342 to rotate and pushes the sliding block 343 to slide on the guide rod 344, and the breaker handle 35 swings along with the sliding of the sliding block 343, so that opening and closing are realized.

This drive assembly 34 stable in structure and retrench, the angle that circuit breaker handle 35 swung is relevant with the position of sliding block 343, and sliding block 343 can only move towards a straight line direction under two guide bar 344 spacing, and because cam 341 is on main shaft 33, the position of main shaft 33 can not change, gyro wheel 342 rotates drive sliding block 343 and slides, the cooperation is simple and reliable, consequently under long-time use, the relative position of cam 341, sliding block 343, gyro wheel 342 and guide bar 344 can not change, the deflection angle of circuit breaker handle 35 is fixed, can not produce the displacement or break away from, guaranteed the reliability of product. As shown in fig. 6, a position of the sliding block 343 corresponding to the roller 342 is provided with a limiting groove 3431 for the roller 342 to insert, and two sides of the sliding block 343 corresponding to the limiting groove 3431 are respectively provided with a first limiting plate 3432 and a second limiting plate 3433 capable of adhering to the roller 342. The side wall surface of the first position-limiting plate 3432 close to the roller 342 is a strip-shaped position-limiting plane 3434, and when the opening operation is performed, the roller 342 rotates and contacts with the position-limiting plane 3434 to drive the sliding block 343 to slide to one side. The side wall surface of the second stopper plate 3433 close to the roller 342 is a stopper arc surface 3435, and when the closing operation is performed, the roller 342 rotates and abuts against the stopper arc surface 3435 to drive the sliding block 343 to slide toward the other side. The first limiting plate 3432 is fixedly connected with the sliding block and can be riveted together through a rivet, the side wall surface of the second limiting plate 3433 close to the roller 342 is a limiting arc surface 3435, the roller 342 rotates clockwise, and when in matching, the first limiting plate 3432 just slides in and slides out of the limiting groove 3431 from the limiting arc surface 3435, so that the matching is stable.

A first matching plate 3436, a second matching plate 3437 and a third matching plate 3438 which are matched with the guide rod 344 in a sliding mode are arranged on two sides of the sliding block 343. The first fitting plate 3436, the second fitting plate 3437 and the third fitting plate 3438 are provided at intervals along the length direction of the guide bar 344, the second fitting plate 3437 is located between the first and third fitting plates 3438, and the first fitting plate 3436 and the third fitting plate 3438 are provided at the same height and above the second fitting plate 3437. The first fitting plate 3436, the second fitting plate 3437 and the third fitting plate 3438 are combined to form a sliding groove 3439 slidably fitted to the guide bar 344, and the guide bar 344 is slidably coupled in the sliding groove 3439 to be slidable along the guide bar 344. And since the first fitting plate 3436, the second fitting plate 3437 and the third fitting plate 3438 are provided at intervals, the guide bar 344 can be more easily fitted into the sliding groove 3439.

As shown in fig. 7, the transmission assembly 32 is a gear transmission assembly including a driving gear 325 and at least one transmission gear connected between the driving gear 325 and the motor 31, and the transmission gear may be one or more. Specifically, the transmission assembly 32 includes a first gear 321, a second gear 322, a third gear 323, a fourth gear 324, and a drive gear 325. The first gear 321 is connected to the rotation shaft of the motor 31, the driving gear 325 is connected to the main shaft 33, and two adjacent gears of the first gear 321, the second gear 322, the third gear 323, the fourth gear 324 and the driving gear 325 are sequentially engaged with each other. When the motor 31 works, the main shaft 33 is driven to rotate by the sequential transmission of the first gear 321, the second gear 322, the third gear 323, the fourth gear 324 and the driving gear 325, and the main shaft 33 drives the breaker handle 35 to swing through the driving component 34, so that the opening and closing in the electric operation mode are realized. It will be appreciated that the transmission assembly 32 may increase or decrease the number of gears as desired.

As shown in fig. 8 and 9, the driving gear 325 is a clutch gear, and the driving gear 325 is disposed coaxially with the main shaft 33 and can be separated from or coupled to the main shaft 33, and is used to realize a manual operation mode and an electric operation mode, respectively. A through hole 3251 connected with the main shaft 33 is formed in the center of the driving gear 325, a gear arc surface 3252 is arranged on the inner wall of the through hole 3251, the gear arc surface 3252 is arranged coaxially with the main shaft 33, one side of the gear arc surface 3252 extends outwards to form a gear concave surface 3253 in arc transition with the gear arc surface 3252, a gap is formed between the gear concave surface 3253 and the main shaft 33, and a gear blocking surface 3254 perpendicular to the inner wall surface of the gear arc surface 3252 is arranged on one side, away from the gear arc surface 3252, of the gear concave surface 3253. Two sets of gear arc surfaces 3252, gear concave surfaces 3253 and gear stop surfaces 3254 are arranged along the axis of the driving gear 325 in a centrosymmetric manner.

A counter bore which is horizontally arranged is formed in the side wall of the main shaft 33 and penetrates through the main shaft 33, a pressure spring 331 is arranged in the counter bore, and both ends of the pressure spring 331 are connected with clutch shafts 332 which can extend out of the counter bore. The main shaft 33 penetrates through the through hole 3251, the clutch shaft 332 corresponds to the inner wall of the through hole 3251, when the driving gear 325 rotates clockwise, the clutch shaft 332 starts to move along the tracks of the gear arc surface 3252, the gear concave surface 3253 and the gear blocking surface 3254 in sequence, the clutch shaft 332 extends out under the action of the spring and can abut against the gear blocking surface 3254, and the driving gear 325 is combined with the main shaft 33, so that the driving gear 325 can drive the main shaft 33 to rotate clockwise.

When the main shaft 33 rotates clockwise, the clutch shaft 332 starts to move along the tracks of the gear blocking surface 3254, the gear concave surface 3253 and the gear arc surface 3252 in sequence, the clutch shaft 332 cannot be attached to the side wall of the gear blocking surface 3254, and the driving gear 325 and the main shaft 33 are separated from each other, so that the main shaft 33 cannot drive the driving gear 325 to rotate clockwise.

The separation and combination of the driving gear 325 and the main shaft 33 are respectively used for realizing a manual operation mode and an electric operation mode, during manual operation, the main shaft 33 rotates clockwise and is separated from the driving gear 325, the main shaft 33 cannot drive the driving gear 325 to rotate, a user can drive the main shaft 33 to rotate clockwise by using a rocker to realize manual closing by driving the limiting arc surface 3435 of the sliding block 343 through the roller 342, and continue to rotate clockwise to realize manual opening by driving the first limiting plate 3432 of the sliding block 343 through the roller 342; during electric operation, the motor drives the driving gear 325 to rotate clockwise, the main shaft 33 is combined with the driving gear 325, the driving gear 325 can drive the main shaft 33 to rotate anticlockwise, and the limiting arc surface 3435 of the sliding block 343 is driven by the roller 342 to realize automatic closing until the motor 31 stops rotating when the closing microswitch is triggered; during brake opening, the motor drives the driving gear 325 to continue to rotate clockwise, and the roller 342 drives the first limit plate 3432 of the sliding block 343 to realize brake opening. The separation and coupling of the driving gear 325 from the main shaft 33 allows the manual operation and the electric operation to be independent from each other.

As shown in fig. 1 and 2, an indication plate 333 coaxially arranged with the main shaft 33 is arranged at the top of the main shaft 33, the indication plate 333 rotates with the main shaft 33, and the indication plate 333 may further be provided with a corresponding closing identifier and an opening identifier, and the indication plate cooperates with an indication window on the surface cover 38 to mechanically indicate the opening and closing state of the circuit breaker. Further, three indicator lights 383 can be arranged on the circuit board, which correspond to the three indicator light windows on the face cover 38, and the three indicator lights 383 are respectively in a closing state, an automatic tripping state and a breaking state and are used for indicating the opening and closing state of the circuit breaker.

Preferably, the electric operation device 3 further includes a lock device 4 and a manual push rod 384, and the lock device 4 and the manual push rod 384 are provided on the face cover 38. The lock device 4 is provided with a limiting part for limiting the sliding block 343, and is used for locking the sliding block 343 to prevent the circuit breaker from being switched on or switched off at will, the lock device 4 is provided with a key hole, and the key drives the lock device 4 to rotate to enable the limiting part to be matched with the sliding block 343.

The manual and automatic push rod 384 is connected to the middle part of the face cover 38 in a sliding manner and used for switching between a manual operation mode and an electric operation mode, manual and automatic character marks 382 are arranged on two sides of the upper part of the manual and automatic push rod 384, a toggle button is arranged on the manual and automatic push rod 384, when the manual and automatic push rod 384 is manually dialed to one side, the automatic push rod 384 does not shield the main shaft 33, but drives the manual and automatic switching microswitch to enable the electric operation device 3 to be incapable of working, the manual and automatic switching microswitch is connected in a driving circuit of the motor 31, automatic switching on and off operation can not be carried out through the motor at the moment, manual and automatic switching off can be realized, at the moment, a user can use a rocker to; when the manual and automatic push rod 384 is dialed to the other side, the automatic push rod 384 shields the main shaft 33, meanwhile, the manual and automatic switching microswitch is closed, a user cannot use the rocker to operate the main shaft 33, the electric operating device 3 works, and the circuit breaker can be automatically switched on and switched off.

Preferably, a rocker mounting groove is further formed on the surface cover 38, and a rocker capable of being inserted into the driving hole of the main shaft 33 is inserted into the rocker mounting groove.

The foregoing is a more detailed description of the present invention, taken in conjunction with the specific preferred embodiments thereof, and it is not intended that the invention be limited to the specific embodiments shown and described. To the utility model belongs to the technical field of ordinary technical personnel, do not deviate from the utility model discloses under the prerequisite of design, can also make a plurality of simple deductions or replacement, all should regard as belonging to the utility model discloses a protection scope.

Claims

1. The utility model provides a moulded case circuit breaker with electric operating means, includes circuit breaker body (1) and locates electric operating means (3) of circuit breaker body (1) one side, electric operating means (3) include motor (31), transmission assembly (32), main shaft (33) and with circuit breaker handle (35) cooperation and drive circuit breaker handle (35) and carry out wobbling drive assembly (34), its characterized in that: the driving assembly (34) comprises a cam (341), a roller (342) connected with an eccentric rod of the cam (341), a sliding block (343) matched with the roller (342) and a guide rod (344) connected with the sliding block (343) in a sliding way;

the roller (342) is inserted into the sliding block (343) and can drive the sliding block (343) to linearly slide along the length direction of the guide rod (344); the main shaft (33) is connected with the cam (341) and used for driving the cam (341) to rotate, the motor (31) is connected with the main shaft (33) through the transmission assembly (32), the main shaft (33) is manually driven to rotate or the motor (31) drives the main shaft (33) to rotate through the transmission assembly (32), the main shaft (33) drives the cam (341) to rotate, the rotation of the cam (341) drives the roller (342) to rotate and pushes the sliding block (343) to slide on the guide rod (344), and the sliding block (343) slides and pushes the breaker handle (35) to perform switching-on and switching-off.

2. The molded case circuit breaker with an electric operating device according to claim 1, wherein: electric operating means (3) include mounting bracket (36) and backup pad (37), and mounting bracket (36) are including first support (362) and second support (363) of the range upon range of setting in interval, form first cavity (361) between first support (362) and second support (363), and install in mounting bracket (36) top backup pad (37), form second cavity (371) between mounting bracket (36) and backup pad (37), drive assembly (32) are located in second cavity (371), drive assembly (34) are located in first cavity (361), and drive assembly (32) and drive assembly (34) range upon range of setting, and motor (31) set up the one side at drive assembly (32) and drive assembly (34), and the pivot of motor (31) is on a parallel with the range upon range of direction setting of drive assembly (32) and drive assembly (34), and motor (31) are installed in first cavity (361) and its pivot is stretched to in second cavity (371) and are connected with drive assembly (32) .

3. The molded case circuit breaker with an electric operating device according to claim 2, wherein: the cam (341) is provided with a central groove (3411) connected with the main shaft (33), the cam (341) is mutually fixed with the main shaft (33) through the central groove (3411), the guide rods (344) are two in total and are horizontally connected to the mounting frame (36) side by side for fixing, the sliding block (343) is connected with the two guide rods (344) in a sliding mode so as to horizontally slide on the guide rods (344) along the length direction of the guide rods (344), the bottom of the sliding block (343) is provided with a driving groove matched with the breaker handle (35), and the breaker handle (35) can be stirred to swing.

4. The molded case circuit breaker with an electric operating device according to claim 2, wherein: the main shaft (33) penetrates through the supporting plate (37) and the second support (363), one end of the main shaft is connected with the cam (341) in the first cavity (361), the middle of the main shaft is in clutch connection with the transmission component (32) in the second cavity (371), the other end of the main shaft (33) extends out of the upper portion of the supporting plate (37), and the end portion of the main shaft is provided with a driving hole for manual driving.

5. The molded case circuit breaker with an electric operating device according to claim 1, wherein: the position department that the sliding block (343) corresponds gyro wheel (342) below has seted up and has supplied gyro wheel (342) to insert spacing groove (3431), the both sides that the sliding block (343) corresponds spacing groove (3431) are provided with respectively can be with gyro wheel (342) attached first limiting plate (3432) and second limiting plate (3433).

6. The molded case circuit breaker with an electric operating device according to claim 5, wherein: the side wall surface of the first limit plate (3432) close to the roller (342) is a strip-shaped limit plane (3434), and when the brake is opened, the roller (342) rotates and is attached to the limit plane (3434); the side wall surface of the second limiting plate (3433) close to the roller (342) is a limiting arc surface (3435), when the closing action is carried out, the roller (342) rotates and is attached to the limiting arc surface (3435), and when the closing action is carried out, the roller (342) slides into and slides out of the limiting groove (3431) from the limiting arc surface (3435).

7. The molded case circuit breaker with an electric operating device according to claim 5, wherein: a first matching plate (3436), a second matching plate (3437) and a third matching plate (3438) which are matched with the guide rod (344) in a sliding mode are arranged on the two sides of the sliding block (343); the first matching plate (3436), the second matching plate (3437) and the third matching plate (3438) are arranged at intervals along the length direction of the guide rod (344), the second matching plate (3437) is positioned between the first matching plate and the third matching plate (3438), and the first matching plate (3436) and the third matching plate (3438) are arranged at the same height and are positioned above the second matching plate (3437); the first fitting plate (3436), the second fitting plate (3437) and the third fitting plate (3438) are combined to form a sliding groove (3439) which is in sliding fit with the guide rod (344).

8. The molded case circuit breaker with an electric operating device according to claim 1 or 4, wherein: the transmission assembly (32) comprises a driving gear (325) and at least one transmission gear connected between the driving gear (325) and the motor (31);

the driving gear (325) and the main shaft (33) are coaxially arranged, the periphery of the driving gear (325) is provided with driving teeth, the center of the driving gear is provided with a through hole (3251) connected with the main shaft (33), the inner wall of the through hole (3251) is provided with a gear arc surface (3252), the gear arc surface (3252) and the main shaft (33) are coaxially arranged, one side of the gear arc surface (3252) extends outwards to form a gear concave surface (3253) in arc transition with the gear arc surface (3252), a gap is formed between the gear concave surface (3253) and the main shaft (33), one side, away from the gear arc surface (3252), of the gear concave surface (3253) is provided with a gear blocking surface (3254) perpendicular to the inner wall surface of the gear arc surface (3252), and two groups of the gear arc surface (3252), the gear concave surface (3253) and the gear blocking surface (3254) are arranged in a central symmetry mode along the axis of the driving gear (325); a counter bore is formed in the side wall of the main shaft (33), the counter bore penetrates through the main shaft (33), a pressure spring (331) is arranged in the counter bore, and both ends of the pressure spring (331) are connected with clutch shafts (332) which can extend out of the counter bore;

the main shaft (33) penetrates through the through hole (3251), the clutch shaft (332) corresponds to the inner wall of the through hole (3251), and when the driving gear (325) rotates towards one side, the clutch shaft (332) can be attached to the gear blocking surface (3254) to enable the driving gear (325) and the main shaft (33) to be combined with each other to drive the main shaft (33) to rotate; when the main shaft (33) rotates clockwise, the clutch shaft (332) cannot be attached to the side wall of the gear blocking surface (3254) so that the driving gear (325) and the main shaft (33) are separated from each other, and clutch connection between the driving gear (325) and the main shaft (33) is realized.

9. The molded case circuit breaker with an electric operating device according to claim 2, wherein: the electric operating device (3) further comprises a circuit board, a closing microswitch and an opening microswitch, wherein the circuit board is electrically connected with the motor (31), the circuit board is arranged above the supporting plate (37), the motor (31) is connected with a control unit on the circuit board, the closing microswitch and the opening microswitch are connected with the control unit on the circuit board, and the closing microswitch and the opening microswitch are arranged on the circuit board; the top of main shaft (33) is equipped with indicator plate (333) with the coaxial setting of main shaft (33), indicator plate (333) become the cam structure, indicator plate (333) along with main shaft (33) when rotating with closing micro-gap switch and separating brake micro-gap switch, provide the circuit breaker signal of closing a floodgate or separating brake.

10. The molded case circuit breaker with an electric operating device according to claim 1, wherein: the electric operating device (3) further comprises a lock device (4), wherein the lock device (4) is provided with a limiting part used for limiting a sliding block (343) and used for locking the sliding block (343) to enable the circuit breaker to be switched on or switched off at will.

11. The molded case circuit breaker with an electric operating device according to claim 2, wherein: the electric operating device (3) further comprises a face cover (38) covering the mounting frame (36) and the supporting plate (37), a rocker mounting groove is formed in the face cover (38), and a rocker capable of being inserted into a driving hole of the spindle (33) is inserted into the rocker mounting groove.

12. The molded case circuit breaker with an electric operating device according to claim 2, wherein: the electric operating device (3) further comprises a manual and automatic push rod (384) which is connected in a sliding mode and used for switching between a manual operating mode and an electric operating mode, when the manual and automatic push rod (384) is manually pulled to one side, the automatic push rod (384) does not shield the main shaft (33), meanwhile, a manual and automatic switching microswitch is driven to enable the electric operating device (3) to be incapable of working, and the manual and automatic switching microswitch is connected in a driving circuit of the motor (31).