Waterproof, anti-adhesion and anti-icing starter electromagnetic switch

Abstract

The invention relates to a waterproof, anti-adhesion and anti-icing starter electromagnetic switch. The waterproof, anti-adhesion and anti-icing starter electromagnetic switch comprises a switch shell, two static contacts, an annular electromagnetic coil, a movable contact seat, a movable contact rod, a movable contact plate, a sliding sleeve and a movable iron core, wherein the two static contacts are fixed to a static contact seat at the bottom of the switch shell; the annular electromagnetic coil and the movable contact seat are fixed to a circumferential inner wall of the switch shell andarranged one above the other; the movable contact rod penetrates through a shaft hole in the movable contact seat; the movable contact plate is arranged at the bottom of the movable contact rod; the sliding sleeve is arranged on a circumferential inner wall of the electromagnetic coil; the movable iron core is arranged in the sliding sleeve; a conical hole is formed in the middle shaft hole in a lower part of the movable contact seat; a conical plug is arranged on a lower part of the rod body of the movable contact rod; a limiting sleeve is arranged at the bottom of the movable iron core; radially symmetrical waist grooves are formed in a side wall of the limiting sleeve; cylindrical pins are arranged on the top of the movable contact rod; the cylindrical pins are located in the waist grooves in corresponding sides; two wedge-shaped plugs are arranged radially and symmetrically between the static contact and the movable contact plate in the static contact seat; and radial compression springs are connected between the wedge-shaped plugs and the circumferential inner wall of the static contact seat. Through adoption of the waterproof, anti-adhesion and anti-icing starter electromagnetic switch, water vapor can be prevented from entering the inside of the electromagnetic switch; the movable contact plate is prevented from adhering to the static contact; and the static contact is prevented from freezing.

Description

technical field [0001] The invention relates to a starter electromagnetic switch, in particular to a waterproof, anti-adhesion and anti-icing starter electromagnetic switch. Background technique [0002] The traditional starter electromagnetic switch consists of a switch case, a static contact seat fixed on the bottom of the switch case, two static contacts fixed on the static contact seat, an annular electromagnetic coil and a moving contact fixed on the inner wall of the switch case. Seat, the moving contact rod pierced in the shaft hole of the moving contact seat, the moving contact piece arranged at the bottom of the moving contact rod, the sliding sleeve arranged on the inner wall of the electromagnetic coil, the moving iron core arranged in the sliding sleeve, and the moving iron core connected to the moving contact rod. The return spring between the iron core and the moving contact seat. Among them, the moving contact piece is a double-contact structure that controls...

AI Technical Summary

Problems solved by technology

Among them, the moving contact piece is a double-contact structure that controls the current flowing through the armature of the starter motor. The two ends of the moving contact piece correspond to two static contacts. When the electromagnetic coil is charged, the moving iron core moves down to drive the moving contact rod and the moving contactor The contact piece moves 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: if the car is placed in a low temperature environment after the engine is turned off, the interior of the static contact seat of the starter electromagnetic switch acts as A relatively closed space begins to radiate heat outward. The two T-bolts used as static contacts are made of metal, and the outer end of the cavity is connected to the cavity wire. The internal temperature is relatively high, so the heat loss is higher than that of the surrounding. The static contact seat made of plastic material is faster, and the temperature drops below 0°C before other parts. The electromagnetic switch of the ice cannot conduct the circuit, and the starter cannot start normally; and there will be an ablation of the moving contact piece and the static contact every time the electromagnetic switch is turned on, which will easily cause the moving contact piece and the static contact to stick.

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