Integrated thermomagnetic system bracket of small circuit breaker and manufacturing method thereof

Abstract

The invention relates to an integrated thermomagnetic system bracket of a small circuit breaker, which comprises a static contact plate, a magnet yoke and a double-metal positioning piece. The magnet yoke is located between the static contact plate and the double-metal positioning piece. The static contact plate, the magnet yoke and the double-metal positioning piece are integrally structured. The magnet yoke comprises a conductive part and a magnetic inductive part. The conductive part is made of a metal conductive material and the magnetic inductive part is made of a ferro magnetic material. According to the thermomagnetic system bracket provided by the invention, the static contact plate, the magnet yoke and the double-metal positioning piece are integrally structured so that the number of parts is reduced, the stability of a magnet yoke magnetic field is enhanced, and the stability of a tripping mechanism of the circuit breaker is improved. At the same time, the cost of the magnet yoke is saved according to dual functions of the magnet yoke where current passes through and which generates the magnetic field, so that the thermomagnetic system bracket as a whole is simpler, and further, the defect that conventional bracket welding leads to deformation of the bracket can be avoided.

Description

technical field [0001] The invention relates to a small circuit breaker, in particular to an integrated thermal-magnetic system bracket of the small circuit breaker and a manufacturing method thereof. Background technique [0002] Circuit breakers are divided into high-voltage circuit breakers and low-voltage circuit breakers according to their scope of use. Low-voltage circuit breaker, also known as automatic switch, commonly known as "air switch", also refers to low-voltage circuit breaker. It is an electrical appliance that not only has the function of manual switch, but also can automatically protect against voltage loss, undervoltage, overload, and short circuit. It can be used to distribute electric energy, start asynchronous motors infrequently, protect power lines and motors, etc., and can automatically cut off the circuit when they have severe overload, short circuit and undervoltage faults. Its function is equivalent to a fuse switch and The combination of overhea...

AI Technical Summary

Problems solved by technology

[0007] The purpose of the present invention is to overcome the deficiencies in the prior art and provide an integrated thermal-magnetic system support for a small circuit breaker, which saves parts by designing the yoke, double gold positioning parts and static contact plates into an integrated structure The occupied space enhances the stability of the magnetic field of the yoke and improves the stability of the tripping mechanism of the circuit breaker. At the same time, according to the dual functions of the yoke that requires current to pass and generates a magnetic field, the yoke is designed to be made of two different materials. Manufactured, saving the cost of the yoke, making the whole structure of the thermo-magnetic system bracket simple, avoiding the shortcomings of traditional bracket welding that lead to bracket deformation, and reducing the scrap rate of products

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