CN220306195U - Reclosing mechanism of miniature circuit breaker - Google Patents

Abstract

The utility model discloses a reclosing mechanism of a miniature circuit breaker, which comprises a first side shell, a second side shell and a cavity formed by connecting the first side shell with the second side shell, wherein a circuit board, a release and a release rod are arranged in the cavity, the release and the circuit board are installed and fixed in a matched manner, the release rod is arranged in the cavity in a rotating manner and is driven in a matched manner with the release, the release comprises a coil framework, an iron core, an ejector rod and a spring which are arranged in an inner hole of the coil framework, the coil framework comprises two supporting parts which are axially distributed, and a winding part which is integrally formed between the two supporting parts, a coil is wound on the outer side of the winding part, pins connected with the coil are arranged on the two supporting parts, welding holes which are matched with the pins in a plugging manner and are welded together are arranged on the circuit board, and the pins are electrically connected with an integrated circuit on the circuit board through the welding holes. The reclosing mechanism of the miniature circuit breaker is simple and compact in structure and convenient to assemble.

Description

Reclosing mechanism of miniature circuit breaker

Technical Field

The utility model relates to a reclosing mechanism of a miniature circuit breaker.

Background

Reclosing circuit breaker is widely used in power transmission and distribution circuit, plays control and protection circuit's effect. Reclosing circuit breaker is including circuit breaker main part, the reclosing mechanism that is connected with the circuit breaker main part generally, and reclosing mechanism can control the circuit breaker through the remote signal, realizes operations such as opening and closing of circuit breaker, can realize the various protect function of circuit breaker.

The Chinese patent application discloses an electric leakage breaker (CN 113972105A) which comprises the reclosing mechanism, wherein the reclosing mechanism comprises a shell, a circuit board and a tripping structure, the tripping structure comprises a tripper, a first rotating shaft and a tripping rod, and the tripper and the circuit board are installed and fixed in a matched manner. When the leakage breaker generates the leakage condition, the release works, the first end of the release rod is attracted, then the first end of the release rod is pushed to rotate along the first direction (namely anticlockwise direction), so that the release rod rotates along the first direction and drives the first contact to be separated from the second contact, then the release stops working and is separated from the release rod, the release rod is reset under the action of the restoring force of the elastic component, and the first contact and the second contact keep separated. Because the release needs to be matched with a special positioning structure on the circuit board for installation and fixation, and the electrical connection with the circuit board and the control chip is also needed to be realized through a wire, the structure is complex, the assembly is inconvenient, and more space inside the shell is occupied.

Disclosure of Invention

The utility model provides a reclosing mechanism of a small circuit breaker, which has simple and compact structure and convenient assembly.

In order to achieve the above purpose, the utility model discloses a reclosing mechanism of a miniature circuit breaker, which comprises a first side shell, a second side shell and a cavity formed by connecting the first side shell with the second side shell, wherein a circuit board, a release and a release rod are arranged in the cavity, the release and the circuit board are installed and fixed in a matched manner, the release rod is rotationally arranged in the cavity and is matched with the release to drive, the release rod is in transmission connection with a lock catch of a circuit breaker main body, the release comprises a coil framework, an iron core, a push rod and a spring which are arranged in an inner hole of the coil framework, the release is matched and connected with a control chip for achieving a leakage protection function, when the control chip detects that the control chip is in a leakage state, the release is electrified, the release can control the push rod to drive the release rod to rotate through the push rod, the release rod drives the lock catch on the circuit breaker main body to rotate, and then tripping action is achieved, the coil framework comprises two support parts which are axially distributed, a winding part which is integrally formed between the two support parts, coils are wound on the outer sides of the winding part, the two support parts are respectively provided with coils, and the coil support parts are connected with the coil pins, and the circuit is provided with the integrated circuit welding holes and the circuit through the pin holes.

Besides the electric connection between the release and the integrated circuit on the circuit board, the pins can be matched with the welding holes on the circuit board for installation and fixation. The circuit board is not required to be provided with a complex installation structure, and wires are not required to be arranged, so that the installation structure of the release is simpler, the assembly is more convenient, and the overall structure of the reclosing mechanism is more compact.

Further, the iron core and the ejector rod are arranged in the inner hole of the coil framework in an axial sliding manner, the spring is propped between the ejector rod and the coil framework and is used for tightly pressing the rear end of the ejector rod to the front end of the iron core, the first side shell is integrally provided with a supporting seat, the supporting seat is arranged at a position corresponding to the rear end of the iron core, and the supporting seat and the iron core form limit fit so as to prevent the iron core from being separated from the inner hole of the coil framework, and when the coil is electrified, the iron core and the ejector rod are driven to move forwards by utilizing an electromagnetic principle; when the coil is powered off, the ejector rod and the iron core are pushed to move backwards to reset under the action of the spring, and the supporting seat is arranged, so that the iron core can be prevented from being separated from the inner hole of the coil framework during resetting movement. By adopting the limiting structure, the whole structure of the release can be simplified, the manufacturing cost of the release is reduced, and meanwhile, the release can be assembled more simply.

Further, the circuit board is arranged close to the first side shell, the release is arranged on one side, far away from the first side shell, of the circuit board, and a first through hole matched with the supporting seat is formed in the first side shell. The supporting seat on the first side shell passes through the first through hole and then is arranged at the position corresponding to the iron core, so that the circuit board and the supporting seat cannot interfere, and the installation is convenient.

Further, be provided with the second through-hole of inserting with the local cooperation of coil skeleton on the circuit board, insert the local of coil skeleton and establish in the second through-hole, be favorable to making the overall structure of circuit board and release compacter.

Further, the two supporting parts of the coil framework are respectively in abutting fit with the two opposite inner edges of the second through hole. Through the butt cooperation of supporting part and second through-hole inner edge, can also improve the installation effect between release and the circuit board, reduce the relative rocking between release and the circuit board to can also prevent the damage of stitch junction.

The beneficial effects of the utility model are as follows: compared with the reclosing mechanism of the interrupt circuit breaker in the prior art, the installation structure of the release is simpler, the overall structure is more compact, no additional configuration wires are needed for connection between the release and the circuit board, the release is directly welded through pins for connection, and meanwhile, the installation fixation and the electrical connection between the release and the circuit board are realized, so that the release is more convenient to install.

Drawings

FIG. 1 is a block diagram of an embodiment of the present utility model;

FIG. 2 is a schematic diagram 1 illustrating the installation of a trip unit according to an embodiment of the present utility model;

FIG. 3 is a schematic view illustrating the installation of a trip bar according to an embodiment of the present utility model;

FIG. 4 is a schematic view of an exemplary embodiment of a release according to FIG. 2;

FIG. 5 is a block diagram of a trip unit according to an embodiment of the present utility model;

FIG. 6 is a cross-sectional view of a trip unit according to an embodiment of the present utility model;

FIG. 7 is a schematic view of an embodiment of a release of the present utility model in installation 3;

fig. 8 is a schematic installation view of a supporting seat according to an embodiment of the utility model.

Detailed Description

An embodiment of a reclosing mechanism for a miniature circuit breaker of the present utility model is shown in fig. 1-8: comprises a first side shell 11, a second side shell 12 and a cavity 10 formed by connecting the first side shell 11 and the second side shell 12, wherein a circuit board 2, a release 3 and a release rod 4 are arranged in the cavity 10, the release 3 and the circuit board 2 are matched, installed and fixed, the release rod 4 is rotatably arranged in the cavity and is matched and driven with the release 3, the release rod 4 is in transmission connection with a lock catch of a breaker main body, the release rod 4 comprises two transmission ends, one transmission end of the transmission end is arranged in the cavity 10 and is matched and driven with the release 3, the other transmission end of the transmission end is arranged outside through an arc-shaped groove 111 on the first side shell 11 and is used for being matched and driven with the lock catch of the breaker main body, the release 3 comprises a coil framework 31, an iron core 32 arranged in an inner hole 310 of the coil framework 31, an ejector rod 33 and a spring 34, the release 3 is matched and connected with a control chip, when the control chip detects that the circuit is in a leakage state, the release 3 is electrified, the release 3 can control the ejector rod 33 to extend forwards by utilizing an electromagnetic principle, the ejector rod 33 drives the release rod 4 to rotate, the release rod 4 drives the lock catch on the breaker main body to rotate, and then the tripping action is realized, the coil framework 31 comprises two supporting parts 311 which are axially distributed, a winding part 312 which is integrally formed between the two supporting parts 311, a coil is wound on the outer side of the winding part 312, pins 313 which are connected with the coil are arranged on the two supporting parts 311, welding holes 21 which are matched with the pins 313 in a plugging mode and welded together are arranged on the circuit board 2, and the pins 313 are electrically connected with an integrated circuit on the circuit board 2 through the welding holes 21.

The pins 313 can be mounted and fixed in cooperation with the solder holes 21 on the circuit board 2 in addition to the electrical connection between the release 3 and the integrated circuit on the circuit board 2. The circuit board 2 does not need to be provided with a complex installation structure, and wires are not required to be additionally arranged, so that the installation structure of the release 3 is simpler, the assembly is more convenient, and the overall structure of the reclosing mechanism is more compact.

The iron core 32 and the ejector rod 33 are both arranged in the inner hole 310 of the coil framework 31 in an axial sliding manner, the spring 34 is propped between the ejector rod 33 and the coil framework 31 and is used for tightly pressing the rear end of the ejector rod 33 against the front end of the iron core 32 (as shown in fig. 6), the first side shell 11 is integrally provided with the supporting seat 112 (as shown in fig. 2, 3, 7 and 8), the supporting seat 112 is arranged at a position corresponding to the rear end of the iron core 32, and the supporting seat 112 and the iron core 32 form limit fit so as to prevent the iron core 32 from being separated from the inner hole 310 of the coil framework 31, and when the coil is electrified, the iron core 32 and the ejector rod 33 are driven to move forwards by utilizing an electromagnetic principle; when the coil is powered off, the ejector rod 33 and the iron core 32 are pushed to move backwards to reset under the action of the spring 34, and the supporting seat 112 is arranged, so that the iron core 32 can be prevented from being separated from the inner hole 310 of the coil skeleton 31 during resetting movement. By adopting the limiting structure, the whole structure of the release 3 can be simplified, the manufacturing cost of the release 3 is reduced, and meanwhile, the release 3 can be assembled more simply. The conventional release 3 has a relatively complex structure, and includes a limiting structure including an iron core 32, an iron frame, and other components, so that the overall size is relatively large.

As shown in fig. 7 and 8, the circuit board 2 is disposed close to the first side shell 11, the release 3 is disposed on a side of the circuit board 2 far away from the first side shell 11, and the circuit board 2 is provided with a first through hole 22 that is matched with the supporting seat 112. The supporting seat 112 on the first side shell 11 passes through the first through hole 22 and then is arranged at a position corresponding to the iron core 32, so that the circuit board 2 and the supporting seat 112 cannot interfere, and the installation is convenient.

As shown in fig. 4, the circuit board 2 is provided with a second through hole 23 that is inserted with the local part of the coil skeleton 31, and the local part of the coil skeleton 31 is inserted into the second through hole 23, which is favorable for making the overall structure of the circuit board 2 and the release 3 more compact, and the second through hole 23 has an abdicating effect. The two supporting portions 31 of the coil bobbin 31 are respectively in abutting engagement with two opposite inner edges of the second through hole 23. Through the butt cooperation of supporting part 31 and second through-hole 23 inner edge, can also improve the installation effect between release 3 and the circuit board 2, reduce the relative rocking between release 3 and the circuit board 2 to can also prevent the damage of stitch junction.

The above embodiment is only one of the preferred embodiments of the present utility model, and common changes and substitutions made by those skilled in the art within the scope of the technical solution of the present utility model are included in the scope of the present utility model.

Claims (5)

1. The utility model provides a reclosing mechanism of miniature circuit breaker, includes first side shell, second side shell, by the cavity that first side shell and second side shell connect the formation, be provided with circuit board, release and circuit board cooperation installation are fixed in the cavity, release rotates the setting in the cavity and with the release cooperation drive, the release is including coil skeleton, iron core, ejector pin, the spring of setting in the coil skeleton hole, its characterized in that: the coil skeleton is including two supporting parts, the integrated into one piece wire winding portion between two supporting parts that the axial distributes set up, the outside of wire winding portion is around being equipped with the coil, all is provided with the stitch that is connected with the coil on two supporting parts, be provided with on the circuit board with stitch cooperation grafting and the welding hole that welds even, the stitch is through the integrated circuit electric connection on welding hole and the circuit board.

2. The reclosing mechanism for a miniature circuit breaker of claim 1, wherein: the iron core and the ejector rod are arranged in the inner hole of the coil framework in an axial sliding mode, the spring is propped between the ejector rod and the coil framework and is used for tightly pressing the rear end of the ejector rod to the front end of the iron core, the first side shell is integrally provided with a supporting seat, the supporting seat is arranged at a position corresponding to the rear end of the iron core, and the supporting seat and the iron core form limiting fit to prevent the iron core from falling out of the inner hole of the coil framework.

3. The reclosing mechanism for a miniature circuit breaker of claim 2, wherein: the circuit board is arranged close to the first side shell, the release is arranged on one side, far away from the first side shell, of the circuit board, and a first through hole matched with the supporting seat is formed in the first side shell.

4. A reclosing mechanism for a miniature circuit breaker according to claim 1 or 3, wherein: the circuit board is provided with a second through hole which is inserted with the local matching of the coil framework.

5. The reclosing mechanism for a miniature circuit breaker of claim 4, wherein: the coil framework is characterized in that two supporting parts are respectively provided with a supporting part which is matched and spliced with the second through holes, and the two supporting parts of the coil framework are respectively in butt fit with the inner edges of the second through holes which are oppositely arranged.