Anti-icing starter electromagnetic switch with dual-layer contactors

Abstract

The invention relates to an anti-icing starter electromagnetic switch with dual-layer contactors. The anti-icing starter electromagnetic switch comprises a housing, an insulating base, two static contacts, an annular supporting limiting seat arranged above the insulating base, a movable contact rod penetrating through the center of the annular supporting limiting seat, movable contact pieces arranged at the lower end of movable contact rod, a reset spring arranged between the lower end of the movable contact rod and the insulating base, a sleeve sleeving on the annular supporting limiting seat, an electromagnetic coil arranged on the external of the sleeve, and a movable iron core; the anti-icing starter electromagnetic switch is characterized in that an auxiliary static contact is arranged over each of the two static contacts separately; the auxiliary static contacts and the sides, far from the movable contact rod, of the static contacts are connected through a stripped metal thin plate; the number of the movable contact pieces is two, and the two movable contact pieces comprise an upper movable contact piece and a lower movable contact piece; the position of the upper movable contact piece is higher than that of the auxiliary static contacts, and the two ends of the upper movable contact piece are corresponding to two auxiliary static contacts respectively; the lower movable contact piece is arranged between the static contact and the auxiliary static contact, and the two ends of the lower movable contact piece are corresponding to two static contacts respectively. The anti-icing starter electromagnetic switch is simple in structure and reliable in use.

Description

technical field [0001] The invention relates to a starter electromagnetic switch for vehicles, in particular to an anti-icing starter electromagnetic switch with double-layer contacts. Background technique [0002] The traditional starter electromagnetic switch includes a casing, an insulating seat arranged at the bottom of the casing, two static contacts arranged in the insulating seat, an annular support limit seat fixed above the insulating seat, and a center of the annular support limit seat. The moving contact rod, the moving contact piece fixed at the lower end of the moving contact rod and forming an angle of 90 degrees with the moving contact rod, the return spring set between the lower end of the moving contact rod and the bottom surface of the insulating seat, set on the ring support The sleeve on the outer periphery of the upper part of the limit seat, the electromagnetic coil arranged in the annular space formed by the sleeve and the casing, the moving iron core ...

AI Technical Summary

Problems solved by technology

When the electromagnetic coil is energized, the moving iron core moves down, thereby driving the moving contact rod and the moving contact piece to move down, so that the two ends of the moving contact piece are respectively connected with the two static contacts to conduct current, but there are the following problems: when the electromagnetic The temperature outside the switch drops, and the heat begins to lose from the switch casing. The material of the two T-bolts as the static contact is metal, so the heat loss is faster than the surrounding plastic static contact seat, and the temperature is earlier than other When the component drops below 0°C, the water vapor inside the switch will condense into ice in the contact area on the surface of the static contact first, and the electromagnetic switch with frozen contacts will not be able to conduct the circuit, and the starter will not start normally.

At present, there is no proven method to solve this problem

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