Direct acting relay with double bridge structure

Abstract

The invention discloses a direct-acting relay with a double-bridge structure, comprising a terminal assembly, a bridge assembly and a magnetic circuit assembly; the terminal assembly is located above the bridge assembly and is opposite to the bridge assembly, and the lower part of the bridge assembly is movable sleeve It is placed in the magnetic circuit assembly and can move up and down; the bridge assembly includes four movable contacts, an upper bridge, a lower bridge, a bridge rod, and a bridge spring, and the four movable contacts are respectively riveted or welded on the upper bridge and the lower bridge. The middle parts of the upper and lower bridges are superimposed and fixed on the top of the bridge rod, the lower end of the bridge rod movably penetrates the magnetic circuit assembly, and the bridge spring is sleeved on the lower part of the bridge rod. Because the bridge assembly of the present invention is a double-bridge direct-acting structure, the original voltage at both ends of the contact is divided into two gaps, respectively, so as to reduce the voltage at both ends of the contact and the energy of the arc, and the original current at both ends of the contact is divided into two sections. Divided into two bridges, the current flowing through the contacts is reduced, the energy of the arc is further reduced, the consumption of the contacts will be greatly reduced, and the life of the relay will be improved.

Description

technical field [0001] The invention relates to an electromagnetic relay, in particular to a direct-acting relay with a double-bridge structure. Background technique [0002] The power supply in the car mostly uses 12VDC, so the rated load voltage of the existing relay is mostly 12VDC. With the development of the automotive industry, more and more high-power automotive components are applied to automobiles, and 12V battery packs have gradually been unable to meet the needs of these high-power components. Because the 48V system has the advantages of being able to carry high-power components and reducing the fuel consumption of the car, it has begun to gradually replace the original 12V system and be applied to the car. With the application of the 48V system, the rated load of the automotive relay has also been increased from the original 12VDC to 48VDC, but the existing automotive relays cannot switch such a large rated voltage and current. [0003] Existing automotive rela...

AI Technical Summary

Problems solved by technology

In order to improve the arc extinguishing ability, some relays add magnetic steel or sealed cavity, which greatly increases the cost

Images