CN218513405U

CN218513405U - Thermal-magnetic release connecting structure of molded case circuit breaker

Info

Publication number: CN218513405U
Application number: CN202222940131.0U
Authority: CN
Inventors: 赵轶磊; 魏晓炜; 张海国; 余家敏
Original assignee: Shanghai Renmin Electrical Apparatus Works Co Ltd
Current assignee: Shanghai Renmin Electrical Apparatus Works Co Ltd
Priority date: 2022-11-04
Filing date: 2022-11-04
Publication date: 2023-02-21
Anticipated expiration: 2032-11-04

Abstract

The utility model relates to a moulded case circuit breaker's thermomagnetic release connection structure, including release module and base (15), the release module includes thermal element (2), wiring row (3), bimetallic strip (4), pull rod (7) and elastic component (14), still includes connecting plate A (1) and connecting plate B (11), and connecting plate A (1) are connected with the release module, connecting plate B (11) connection base (15) and connecting plate A (1), are connected the release module with base (15) through connecting plate B (11) and connecting plate A (1) and constitute the independent dismantled and assembled connecting module of thermomagnetic release. The utility model provides a simple structure, stability is good, and the installation effectiveness is high, the change and the maintenance of the different current specification thermomagnetic release of being convenient for, the thermomagnetic release connection structure of moulded case circuit breaker of protection circuit.

Description

Thermal-magnetic release connecting structure of molded case circuit breaker

Technical Field

The utility model belongs to the technical field of the low-voltage apparatus technique and specifically relates to a moulded case circuit breaker's thermomagnetic release connection structure is related to.

Background

The release is a common device used for releasing a holding mechanism of the circuit breaker so as to automatically break the circuit breaker, and can be generally divided into a magnetic release, an electronic release and a thermomagnetic release, wherein the thermomagnetic release has very wide application due to the advantages of low cost, stable performance, long service life and the like; when short-circuit current exists in the circuit, the electromagnetic system generates electromagnetic force, and the armature moves to actuate the traction rod, so that the operating mechanism acts to disconnect the circuit.

In the current market, in a 63A shell frame product with a thermomagnetic release, the release is particularly difficult to mount on a base and the production efficiency is low due to the fact that the position space of the release reserved by the whole switch and the base is too small. In the past, the small-shell-frame molded case circuit breaker has smaller space, overload protection is realized by small current, a conductive system is directly welded on a release, and the thermo-magnetic release with different current specifications is extremely inconvenient to replace.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing a simple structure in order to overcome the defect that above-mentioned prior art exists, stability is good, and the installation effectiveness is high, the change and the maintenance of the different current specification thermomagnetic release of being convenient for, the moulded case circuit breaker's of protection circuit thermomagnetic release connection structure.

The purpose of the utility model can be realized by the following technical proposal:

the utility model provides a moulded case circuit breaker's hot magnetic release connection structure, includes release module and base, the release module includes thermal element, the line bank, bimetallic strip, pull rod and elastic component, still includes connecting plate A and connecting plate B, and connecting plate A is connected with the release module, and connecting plate B connects base and connecting plate A, through connecting plate B and connecting plate A with release module and pedestal connection constitute the independent dismantled and assembled connecting module of hot magnetic release, the change and the maintenance of the hot magnetic release of different electric current specifications of being convenient for, protection circuit.

Further, the connection plate a and the bimetal are welded together on the thermal element.

Further, the connecting plate B is fixed on the base through a screw B.

Furthermore, the elastic piece is sleeved on the outer side of the coil and is installed in a half-open air cavity formed by the shell A and the shell B, and the mutual noninterference of the welding positions of the coil and the bimetallic strip is guaranteed.

Further, the coil is connected with a pull rod, and the pull rod is arranged at the upper end of a semi-open cavity formed by the shell A and the shell B.

Further, the shell A and the shell B are connected with the connecting plate A through screws C.

Furthermore, a plurality of protrusions extending upwards are arranged at the upper end of the shell A, a plurality of grooves are formed in two sides of the shell B, and the protrusions on the shell A and the grooves of the shell B are matched and assembled to form a semi-open cavity.

Further, the connecting plate A is fixedly connected with the connecting plate B through a screw C.

Further, the elastic piece is connected with the wiring bar through welding.

Furthermore, a screw A is arranged at the top of the bimetallic strip, and the front position and the rear position of the screw A are adjusted to correct errors caused by thermal overload tripping of the circuit breaker.

Compared with the prior art, the utility model has the advantages of it is following:

(1) Current 63A cradle or less current switch's product is because the space is less, and the tripper position of reserving is not enough, the utility model discloses change in the past tripper and the direct welded connected mode of electrically conductive system, adopt screw fixation tripper and electrically conductive system, make tripper and electrically conductive system become two independent parts, the change and the maintenance of the hot magnetism tripper of the different electric current specifications of being convenient for, protection circuit.

(2) The utility model discloses simple structure, the action is reliable, and stability is good, and the installation effectiveness is high, provides the function of high-efficient reliable installation release for the small-size moulded case circuit breaker who is equipped with thermomagnetic formula release.

Drawings

FIG. 1 is a schematic sectional view of the present invention;

FIG. 2 is a schematic view of the present invention;

FIG. 3 is a schematic sectional view of a part of the structure after installation of the present invention;

FIG. 4 is a schematic view of the mounting structure of the connection board A, the thermal element, the bimetallic strip, the spring, the wiring bar and the connection board B of the present invention;

fig. 5 is a schematic view of the mounting structure of the connection plate a, the thermal element, the bimetallic strip, the wiring bar and the spring of the present invention;

FIG. 6 is a structural view of the connection plate A, the thermal element and the bimetallic strip according to the present invention;

FIG. 7 is a view showing the installation structure of the spring, the thermal element and the connecting plate A of the present invention;

FIG. 8 is a schematic view of the installation structure of the coil, spring, pull rod, shell A and shell B of the present invention;

FIG. 9 is a schematic view of the connecting plate B of the present invention;

fig. 10 is a schematic view of the installation structure of the coil, the spring, the pull rod, the shell a and the shell B of the present invention.

Detailed Description

The present invention will be described in detail below with reference to the accompanying drawings and specific embodiments.

Examples

As shown in fig. 1-3, a thermal-magnetic release connection structure of a molded case circuit breaker, includes a release module and a base 15, the release module includes a thermal element 2, a wiring bar 3, a bimetallic strip 4, a pull rod 7 and an elastic member 14, and further includes a connection plate A1 and a connection plate B11 as shown in fig. 9, the connection plate A1 is connected with the release module, the connection plate B11 is connected with the base 15 and the connection plate A1, the release module and the base 15 are connected through the connection plate B11 and the connection plate A1 to form an independent detachable connection module of the thermal-magnetic release, thereby facilitating replacement and maintenance of thermal-magnetic releases with different current specifications and protecting circuits.

As shown in fig. 1-3, a screw A6 is arranged at the top of the bimetallic strip 4, and the front and rear positions of the screw A6 can be adjusted to correct errors caused by thermal overload tripping of each circuit breaker in the manufacturing and assembling processes of parts; as shown in fig. 4-6, the connection plate A1 and the bimetal 4 are welded together on the thermal element 2; as shown in fig. 7, the elastic member 14 is connected to the terminal block 3 by welding; as shown in fig. 8, a plurality of protrusions extending upward are arranged at the upper end of the shell A9, a plurality of grooves are arranged at two sides of the shell B10, the protrusions on the shell A9 and the grooves of the shell B10 are matched and assembled to form a semi-open cavity, the elastic member 14 is sleeved outside the coil 8 and is installed in the semi-open cavity formed by the shell A9 and the shell B10, the welding positions of the coil and the bimetallic strip are ensured not to interfere with each other, the coil 8 is connected with the pull rod 7, the pull rod 7 is installed at the upper end of the semi-open cavity formed by the shell A9 and the shell B10, and the pull rod 7 drives the pull rod to rotate, so that tripping of the tripper is realized.

As shown in fig. 1-3, the shell A9 and the shell B10 are connected with the connecting plate A1 through screws C13, the connecting plate A1 is fixedly connected with the connecting plate B11 through screws C13 to form a complete thermo-magnetic release connecting structure, as shown in fig. 10, the connecting plate B11 is fixed on the base 15 through screws B12, so that the release and the conducting system become two independent parts, and for replacement and maintenance of thermo-magnetic releases of different current specifications, only the screws B12 need to be loosened to take down the thermo-magnetic release connecting structure from the base 15, and the structure is simple, the stability is good, and the installation efficiency is high.

To sum up, the utility model discloses change in the past the direct welded connected mode of release and electrically conductive system, adopt fix with screw release and electrically conductive system, make release and electrically conductive system become two independent parts, the change and the maintenance of the different current specification thermomagnetic release of being convenient for, simple structure, the action is reliable, and stability is good, and the installation effectiveness is high, provides the function of the reliable installation release of high efficiency for the small-size moulded case circuit breaker who is equipped with thermomagnetic formula release.

Claims

1. The utility model provides a moulded case circuit breaker's thermomagnetic trip connection structure, includes release module and base (15), the release module includes thermal element (2), line bank (3), bimetallic strip (4), pull rod (7) and elastic component (14), its characterized in that still includes connecting plate A (1) and connecting plate B (11), connecting plate A (1) are connected with the release module, connecting plate B (11) connection base (15) and connecting plate A (1), be connected release module and base (15) through connecting plate B (11) and connecting plate A (1) and constitute the independent dismantled and assembled connecting module of thermomagnetic trip.

2. The thermo-magnetic release connection structure of a molded case circuit breaker according to claim 1, wherein the connection plate a (1) and the bimetal (4) are welded together on the thermal element (2).

3. The thermo-magnetic release connection structure of a molded case circuit breaker according to claim 1, wherein the connection plate B (11) is fixed to the base (15) by a screw B (12).

4. The thermo-magnetic release connection structure of a molded case circuit breaker according to claim 1, wherein the elastic member (14) is fitted around the outside of the coil (8) and installed in a half-open air cavity formed by the case a (9) and the case B (10).

5. The thermo-magnetic release connection structure of a molded case circuit breaker according to claim 4, wherein the coil (8) is connected with a pull rod (7), and the pull rod (7) is installed at an upper end of a semi-open cavity formed by the case A (9) and the case B (10).

6. The thermo-magnetic release connection structure of a molded case circuit breaker according to claim 4, wherein the case A (9) and the case B (10) are connected to the connection plate A (1) by a screw C (13).

7. The thermo-magnetic release connection structure of a molded case circuit breaker according to claim 5, wherein the case A (9) is provided at an upper end thereof with a plurality of protrusions extending upward, the case B (10) is provided at both sides thereof with a plurality of grooves, and the protrusions of the case A (9) and the grooves of the case B (10) are fitted to form a semi-open cavity.

8. The thermo-magnetic release connection structure of a molded case circuit breaker according to claim 5, wherein the connection plate A (1) is fixedly connected with the connection plate B (11) by a screw C (13).

9. The thermo-magnetic release connection structure of a molded case circuit breaker according to claim 1, wherein the elastic member (14) is connected to the terminal block (3) by welding.

10. The thermo-magnetic release connection structure of a molded case circuit breaker according to claim 1, wherein a screw a (6) is provided on a top of the bimetal (4), and a front and rear position of the screw a (6) is adjusted to correct an error caused by thermal overload release of the circuit breaker.