CN108878230B

CN108878230B - Limiting structure of breaker contact

Info

Publication number: CN108878230B
Application number: CN201810968098.8A
Authority: CN
Inventors: 蔡元钦; 高明涛; 孙倩
Original assignee: Wuxi Sahat Electrical Co Ltd
Current assignee: Wuxi Sahat Electrical Co Ltd
Priority date: 2018-08-23
Filing date: 2018-08-23
Publication date: 2024-04-16
Anticipated expiration: 2038-08-23
Also published as: CN108878230A

Abstract

The invention discloses a limit structure of a circuit breaker contact, which comprises a moving contact, a rotating shaft and a fixed pin, wherein an assembly cavity is formed in the rotating shaft, an assembly groove is correspondingly formed in the inner wall of the assembly cavity, the fixed pin is installed in the rotating shaft through the assembly groove, one end of the moving contact is rotatably hinged to the fixed pin, the assembly groove comprises a straight groove with an opening at the bottom, an arc limit groove matched with the fixed pin is formed in the groove bottom of the straight groove in an extending mode, the arc limit groove is provided with a limit edge positioned at the bottom of the fixed pin, and the fixed pin enters the assembly groove from the straight groove and is arranged in the arc limit groove. Above-mentioned limit structure of circuit breaker contact carries out optimal design with the epaxial assembly groove of pivot, carries out spacingly to the fixed pin through circular arc spacing groove to can remain throughout on the rotation center when making the fixed pin receive the impact of contact blade motion. The structure is simple, and the implementation is easy; and the stable reliability of the operation of the circuit breaker can be ensured.

Description

Limiting structure of breaker contact

Technical Field

The invention relates to a circuit breaker, in particular to a limit structure of a circuit breaker contact.

Background

A circuit breaker is a switching device capable of closing, carrying and breaking a current under normal circuit conditions and capable of closing, carrying and breaking a current under abnormal circuit conditions for a prescribed time. The circuit breaker can be used for distributing electric energy, starting the asynchronous motor infrequently, protecting a power line, the motor and the like, and automatically cutting off the circuit when serious overload or short circuit, undervoltage and other faults occur, and the functions of the circuit breaker are equivalent to the combination of a fuse type switch, an over-under-heating relay and the like.

At present, the moving contact system of the existing circuit breaker comprises a moving contact, a rotating shaft, a fixing pin and a supporting frame, wherein the moving contact is arranged in the supporting frame, the fixing pin penetrates through mounting holes of the moving contact and the supporting frame to finally mount the component in the rotating shaft, but in a specific working process, the moving contact is in a straight groove with an opening at the bottom because of an assembly groove of the rotating shaft in the moving process, the fixing pin is impacted by movement of a contact piece, the fixing pin is caused to be incapable of being kept on the rotating center, contact pressure changes, and the contact opening distance of each circuit is not uniform, so that normal working of the circuit breaker is influenced.

Disclosure of Invention

The invention aims to provide a limit structure of a circuit breaker contact, which solves the problem that a fixed pin cannot be kept at the same rotation center in a circuit breaker moving contact system in the prior art.

To achieve the purpose, the invention adopts the following technical scheme:

the utility model provides a limit structure of circuit breaker contact, its includes moving contact, pivot and fixed pin, have the assembly chamber in the pivot, correspond on the inner wall in assembly chamber and be provided with the assembly groove, the fixed pin pass through the assembly groove install in the pivot, the one end of moving contact articulates on the fixed pin rotationally, wherein, the assembly groove includes bottom open-ended straight flute, the tank bottom of straight flute extends to one side has the cooperation the circular arc spacing groove that the fixed pin set up, circular arc spacing groove has and is located the spacing limit of fixed pin bottom, the fixed pin gets into the assembly groove from the straight flute and sets up in circular arc spacing inslot.

In particular, the fixing pins are provided with a supporting frame for fixing the whole contact operating mechanism on the circuit breaker base.

Particularly, the support frame comprises a fixed plate, two sides of the fixed plate upwards extend to form two side plates, and the two side plates are connected to the fixed pins.

Specifically, the arc limiting groove and the straight groove form an included angle of 90 degrees, and the arc limiting groove extends from the bottom of the straight groove to one side away from the opening and closing end of the moving contact.

Compared with the prior art, the limit structure of the circuit breaker contact has the beneficial effects that the limit structure of the circuit breaker contact optimally designs the assembly groove on the rotating shaft, and the fixing pin is limited through the arc limit groove, so that the fixing pin can be always kept on the rotating center when being impacted by the movement of the contact blade. The structure is simple, and the implementation is easy; and the stable reliability of the operation of the circuit breaker can be ensured.

Drawings

Fig. 1 is a cross-sectional view of a limit structure of a circuit breaker contact provided in an embodiment of the present invention;

fig. 2 is a schematic perspective view of a limit structure of a circuit breaker contact according to an embodiment of the present invention.

In the figure:

1. a moving contact; 2. a rotating shaft; 3. a fixing pin; 4. a support frame; 40. a fixing plate; 41. a side plate; 5. an assembly groove; 50. a straight groove; 51. circular arc limit groove; 52. limit edges.

Detailed Description

The technical scheme of the invention is further described below by the specific embodiments with reference to the accompanying drawings.

Referring to fig. 1 and 2, in this embodiment, a limit structure of a circuit breaker contact includes a moving contact 1, a rotating shaft 2, a fixing pin 3 and a supporting frame 4, an assembly cavity is provided in the rotating shaft 2, an assembly groove 5 is correspondingly provided on an inner wall of the assembly cavity, the fixing pin 3 is installed in the rotating shaft 2 through the assembly groove 5, one end of the moving contact 1 is rotatably hinged on the fixing pin 3, the supporting frame 4 is also installed on the fixing pin 3 for fixing the whole contact operating mechanism on a circuit breaker base, the supporting frame 4 includes a fixing plate 40, fixing holes are provided on the fixing plate 40, two side plates 41 extend upwards from two sides of the fixing plate 40, and the two side plates 41 are both connected on the fixing pin 3.

The assembly groove 5 comprises a straight groove 50 with an opening at the bottom, an arc limiting groove 51 which is matched with the fixed pin 3 is arranged on one side, far away from the opening and closing end of the moving contact 1, of the groove bottom of the straight groove 50, the arc limiting groove 51 and the straight groove 50 form an included angle of 90 degrees, the arc limiting groove 51 is provided with a limiting edge 52 which is positioned at the bottom of the fixed pin 3, the fixed pin 3 enters the assembly groove 5 from the straight groove 50 and is arranged in the arc limiting groove 51, and through limiting of the arc limiting groove 51, the fixed pin 3 cannot be kept on the rotating center when being impacted by movement of a contact piece is avoided. The stable reliability of the operation of the circuit breaker is ensured.

The above embodiments merely illustrate the basic principles and features of the present invention, and the present invention is not limited to the above examples, but can be variously changed and modified without departing from the spirit and scope of the present invention, which is within the scope of the present invention as claimed. The scope of the invention is defined by the appended claims and equivalents thereof.

Claims

1. The utility model provides a limit structure of circuit breaker contact, its includes moving contact, pivot and fixed pin, have the assembly chamber in the pivot, be provided with the assembly groove on the inner wall in assembly chamber corresponds, the fixed pin passes through the assembly groove and installs in the pivot, the one end of moving contact can rotationally articulate on the fixed pin, its characterized in that, the assembly groove includes bottom open-ended straight flute, the tank bottom of straight flute extends to one side has the circular arc spacing groove that the cooperation fixed pin set up, circular arc spacing groove has the spacing limit that is located the fixed pin bottom, the fixed pin gets into the assembly groove from the straight flute and sets up in circular arc spacing groove;

the arc limiting groove and the straight groove form an included angle of 90 degrees, and the arc limiting groove extends from the bottom of the straight groove to one side away from the opening and closing end of the moving contact.

2. The limit structure of the circuit breaker contact according to claim 1, wherein the fixing pin is provided with a supporting frame for fixing the whole contact operating mechanism to the circuit breaker base.

3. The spacing structure of the circuit breaker contact according to claim 2, wherein the support frame comprises a fixing plate, two side plates extend upwards from two sides of the fixing plate, and the two side plates are connected to the fixing pin.