CN216562977U

CN216562977U - Automatic reclosing miniature circuit breaker

Info

Publication number: CN216562977U
Application number: CN202120372841.0U
Authority: CN
Inventors: 李欣昊; 周斌雷; 柳盛森; 林秋; 柳凌志
Original assignee: Fanlian Electric Technology Wenzhou Co ltd
Current assignee: Wenzhou Sanda Technology Co ltd
Priority date: 2021-02-10
Filing date: 2021-02-10
Publication date: 2022-05-17
Anticipated expiration: 2031-02-10

Abstract

The utility model relates to an automatic reclosing miniature circuit breaker, which comprises a breaker breaking unit and an automatic reclosing device, wherein the automatic reclosing device comprises a shell, an automatic reclosing assembly and an intelligent control circuit board, the automatic reclosing assembly comprises a motor, a worm, a handle, a half gear, a driving gear and a tripping push rod, the half gear is linked with the handle, the driving gear is meshed with the worm, the tripping push rod is rotatably arranged in the shell and matched with a tripping shaft of a breaker, the tripping push rod moves along with the driving gear and can push the tripping shaft of the breaker to move, a bump is arranged on the driving gear, two microswitches are respectively arranged on the intelligent control circuit board at positions corresponding to the motion tracks of the bumps, the bumps rotate along with the driving gear and can respectively trigger the two microswitches, and the connection or disconnection of the two microswitches can be realized. The utility model has the advantages of simple structure, stable and reliable performance, small volume, low failure rate and high safety.

Description

Automatic reclosing miniature circuit breaker

Technical Field

The utility model relates to the technical field of circuit breakers, in particular to an automatic reclosing miniature circuit breaker.

Background

At present, small circuit breakers are widely used in low-voltage distribution networks, mainly in various places such as industrial, commercial, high-rise and residential houses, and can perform overcurrent protection and leakage protection on electric devices such as motors, distribution lines and lighting circuits. The traditional small circuit breaker needs manual operation to complete the opening and closing actions. With the development of intelligent power grids in China, on the premise of requiring safe operation of the power grids, the realization of intellectualization of control of electric appliances is more and more urgent. In order to cope with new situation changes, the existing miniature circuit breaker should be provided with an automatic reclosing function. The electric operating mechanism of the miniature circuit breaker is an accessory used for a remote electric opening and closing circuit breaker, is directly matched with a prepayment electric energy meter for use, and can realize reclosing after payment. However, the existing miniature circuit breaker with automatic reclosing has the defects of complex structure, large volume, unreliable performance, higher failure rate and high cost.

Disclosure of Invention

The utility model aims to overcome the defects of the prior art and provides the automatic reclosing miniature circuit breaker which is simple in structure, stable and reliable in performance, small in size, low in failure rate and high in safety.

In order to achieve the purpose, the utility model adopts an automatic reclosing miniature circuit breaker, which comprises a breaker breaking unit and an automatic reclosing device assembled with the breaker breaking unit, wherein the automatic reclosing device comprises a shell assembled with the breaker breaking unit, an automatic reclosing assembly arranged in the shell and an intelligent control circuit board arranged in the shell, the automatic reclosing assembly comprises a motor, a worm linked with the motor, a handle rotationally arranged on the shell and linked with an operating handle of the breaker breaking unit, a half gear linked with the handle, a driving gear meshed with the worm and a tripping push rod rotationally arranged in the shell and matched with a tripping shaft of the breaker, the tripping push rod acts along with the driving gear and can push the tripping shaft of the breaker to act, the driving gear is provided with a convex block, and two microswitches are respectively arranged on the intelligent control circuit board corresponding to the motion tracks of the convex block, the lug rotates along with the driving gear and can respectively trigger the two micro switches, and the two micro switches can be switched on or switched off.

The beneficial effect of above-mentioned structure is: two micro switches matched with the driving gear are arranged on the intelligent control circuit board, and the working positions of the driving gear can be monitored by the two micro switches, so that the working reliability of the automatic reclosing assembly can be improved. When the electric brake is switched off, the driving gear drives the tripping push rod to act, the tripping push rod toggles the tripping shaft to act, so that the electric brake switching off of the circuit breaker is realized, when a user is lack of time, the tripping push rod is kept in a tripping state on the tripping push rod, and the circuit breaker cannot be manually switched on. Therefore, the automatic reclosing miniature circuit breaker has the advantages of simple structure, stable and reliable performance, small size, low failure rate and high safety.

Particularly, a plurality of support columns are arranged in the shell, the intelligent control circuit board is arranged on the support columns, and screws connected with the support columns are respectively arranged on the intelligent control circuit board. The intelligent control circuit board is fixed on the support column, so that heat dissipation of the intelligent control circuit board is facilitated, the intelligent control circuit board is more convenient to assemble with the shell, and the assembly efficiency of the automatic reclosing miniature circuit breaker is improved.

Particularly, the half-gear on be provided with spacing axle, spacing axle block in proper order in handle, operating handle's triangular hole, and constitute half-gear and handle, operating handle's linkage cooperation, handle and operating handle between be provided with the universal driving shaft, and constitute handle and operating handle's linkage cooperation. The half gear is clamped on the handle and the operating handle through the limiting shaft, so that the half gear is more convenient to assemble with the handle and the operating handle, and the linkage shaft is arranged between the handle and the operating handle, so that the transmission between the handle and the operating handle is more reliable.

Drawings

FIG. 1 is a perspective view of an embodiment of the present invention.

Fig. 2 is an internal structural view of the embodiment of the present invention.

Fig. 3 is an exploded view of the internal structure of the embodiment of the present invention.

Detailed Description

As shown in fig. 1 to 3, an embodiment of the utility model is an automatic reclosing miniature circuit breaker, which includes a breaker unit 10 and an automatic reclosing device 20 assembled with the breaker unit 10, wherein the automatic reclosing device 20 includes a housing 21 assembled with the breaker unit 10, an automatic reclosing assembly 30 disposed in the housing 21, and an intelligent control circuit board 22 disposed in the housing 21, the automatic reclosing assembly 30 includes a motor 31, a worm 32 linked with the motor 31, a handle 33 rotatably disposed on the housing 21 and linked with an operating handle 11 of the breaker unit 10, a half gear 330 linked with the handle 33, a driving gear 34 engaged with the worm 32, and a tripping push rod 35 rotatably disposed in the housing 21 and matched with a breaker tripping shaft 12, the trip rod 35 acts along with the driving gear 34 and can push the breaker tripping shaft 12 to act, the driving gear 34 is provided with a bump 341, the intelligent control circuit board 22 is provided with two micro switches 221 at the positions corresponding to the movement tracks of the bump 341, the bump 341 rotates along with the driving gear 34 and can trigger the two micro switches 221 respectively, and the two micro switches 221 can be switched on or off. The casing 21 in be provided with a plurality of support columns 211, intelligent control circuit board 22 set up on a plurality of support columns 211, and be provided with the screw that is connected with a plurality of support columns 211 on the intelligent control circuit board 22 respectively. The intelligent control circuit board is fixed on the support column, so that heat dissipation of the intelligent control circuit board is facilitated, the intelligent control circuit board is more convenient to assemble with the shell, and the assembly efficiency of the automatic reclosing miniature circuit breaker is improved.

As shown in fig. 3, the half gear 330 is provided with a limit shaft 36, the limit shaft 36 is sequentially clamped in the triangular holes 331 of the handle 33 and the operating handle 11, and forms linkage fit of the half gear 330 with the handle 33 and the operating handle 11, and a linkage shaft 37 is provided between the handle 33 and the operating handle 11 and forms linkage fit of the handle 33 with the operating handle 11. The half gear clamps on handle, operating handle through spacing axle to half gear is more convenient with handle, operating handle's assembly, and is provided with the universal driving shaft between handle and the operating handle, thereby can guarantee that handle and operating handle's transmission is more reliable.

Two micro switches matched with the driving gear are arranged on the intelligent control circuit board, and the working positions of the driving gear can be monitored by the two micro switches, so that the working reliability of the automatic reclosing assembly can be improved. When the electric brake is switched off, the driving gear drives the tripping push rod to act, the tripping push rod toggles the tripping shaft to act, so that the electric brake switching off of the circuit breaker is realized, when a user is lack of time, the tripping push rod is kept in a tripping state on the tripping push rod, and the circuit breaker cannot be manually switched on. Therefore, the automatic reclosing miniature circuit breaker has the advantages of simple structure, stable and reliable performance, small size, low failure rate and high safety.

Claims

1. The utility model provides an automatic reclosing miniature circuit breaker, includes circuit breaker disconnected unit, the automatic reclosing device of assembling mutually with circuit breaker unit, automatic reclosing device include the casing of assembling mutually with circuit breaker unit, set up the automatic reclosing subassembly in the casing, set up the intelligent control circuit board in the casing, its characterized in that: the automatic reclosing assembly include the motor, set up with the motor linkage worm, rotate the setting on the casing and with the operating handle linkage of circuit breaker unit handle, with the half-gear that the handle linkage set up, with worm engaged with drive gear, rotate the setting in the casing and with circuit breaker trip shaft matched with dropout push rod, dropout push rod along with drive gear action and can promote circuit breaker trip shaft action, drive gear on be provided with a lug, the intelligent control circuit board on correspond the motion orbit department of lug and be provided with two micro-gap switches respectively, the lug rotate and can trigger two micro-gap switches respectively along with drive gear, and can realize two micro-gap switch's switch-on or disconnection.

2. The recloser miniature circuit breaker according to claim 1, characterized in that: the casing in be provided with a plurality of support columns, intelligent control circuit board set up on a plurality of support columns, and be provided with the screw that is connected with a plurality of support columns on the intelligent control circuit board respectively.

3. The recloser miniature circuit breaker according to claim 1 or 2, characterized in that: the half-gear on be provided with spacing axle, spacing axle block in proper order in handle, operating handle's triangular hole, and constitute half-gear and handle, operating handle's linkage cooperation, handle and operating handle between be provided with the universal driving shaft, and constitute handle and operating handle's linkage cooperation.