Transmission connection structure for high current DC contactor

Abstract

The invention discloses a transmission connection structure for a high current DC contactor. The action of an electromagnet is transmitted to a control switch and is converted into a control signal tobe sent to a locomotive control system to a remote end. The transmission connection structure comprises a spring system, a support seat (8), a moving contact (9), a static contact (10), a conductivecopper bar (11), a micro-switch action mechanism and a housing (19). The transmission connection structure has the advantages of a simple structure and easy installation, the unified management of product quality is facilitated, and combined with a suction electromagnet with more stable output, the problem of the sharp increase of an external dimension of the contactor after the capacity is increased can be solved. The contactor used in the limited space of a locomotive provides a sufficient open distance, the number of transmission parts is reduced, the transmission efficiency is improved, and the reliability of transmission is ensured.

Description

technical field [0001] The invention relates to mechanical and electronic automatic control technology, in particular to a transmission connection structure for a large-current DC contactor. Background technique [0002] The contactor used by electric locomotive is mainly installed in the traction conversion system of the locomotive or EMU, and belongs to the isolation device of the main circuit of the locomotive. Its main function is to isolate the main circuit of the traction motor of the locomotive; the quality of the contactor is directly related to the running state of the locomotive. Once a failure occurs, it will directly lead to a machine breakdown accident. It is an important part in the locomotive circuit. [0003] At present, most DC contactors in the domestic market use snap-in electromagnets. Since the output force value of snap-in electromagnets will drop sharply as the stroke increases, with the development needs of the rail transit industry, DC contactors wit...

AI Technical Summary

Problems solved by technology

[0003] At present, most DC contactors in the domestic market use snap-in electromagnets. Since the output force value of snap-in electromagnets will drop sharply as the stroke increases, with the development needs of the rail transit industry, DC contactors with higher breaking capacity will be required. The increase of the breaking capacity will lead to the increase of the opening distance of the contactor, which requires the electromagnet to provide a larger stroke. In the limited space of the locomotive, it is impossible to increase the volume of the contactor infinitely, which requires the entire power and transmission of the contactor. system optimization

[0004] Existing high-current DC contactors for locomotives have many parts in the transmission structure, and often need to adjust multiple parts to meet the requirements of the locomotive. This virtually increases the difficulty of the assembly process and is not conducive to the guarantee of product quality. , which also increases the difficulty of after-sales service

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