Stable and voltage-resistant power relay

Abstract

The invention discloses a stable and voltage-resistant power relay. The power relay comprises a casing, a base, an armature, a yoke, a pushrod, a normally-closed static spring, a normally-open staticspring and a dynamic spring, wherein the armature and the yoke are connected together through an elastic sheet, the yoke is installed on the base in an inserted mode, limit blocks at the bottom of thecasing prevents the yoke from shifting upwards, a baffle in the casing avoids lateral shift of the armature, arc-shaped stop blocks avoid upward shift of the armature, the tail of the armature and avoltage-resistant slot of the base are in clearance fit, the tail of the armature is connected with one end of the pushrod through a connecting hole, the other end of the pushrod is connected with a connecting hole of the dynamic spring, an insulation screen is arranged in the middle of the pushrod, the creepage distance between the dynamic spring and the armature is prolonged, the normally-open static spring with a buffer sheet is inserted into the base, a trapezoidal protective plate of the base is in fit with the buffer sheet, and limit protection of the normally-open static spring is realized. The stable and voltage-resistant power relay has the advantages of being compact in structure, small in size, excellent in insulating property, resistant to voltage, high in stability, long in product service life and the like; and moreover, the structure is simple, and it is convenient to perform processing and realize automatic assembling.

Description

technical field [0001] The invention relates to a small electromagnetic relay, in particular to a power relay with stable voltage resistance, and belongs to the technical field of electrical equipment. Background technique [0002] Electromagnetic relay is a relay that uses electromagnetic force to drive the relative movement of mechanical parts to produce a predetermined response. It is generally composed of iron core, coil, armature, yoke, dynamic and static reed with contacts, etc. When the current passes through the coil, an electromagnetic force is generated, and the armature is attracted, so that the moving contact of the moving reed is in contact with the static contact of the static reed; when the current in the coil disappears, the electromagnetic force disappears, and the armature resets, thus The moving contact of the moving reed is separated from the static contact of the static reed, and the purpose of conducting or cutting off the circuit is achieved through th...

AI Technical Summary

Problems solved by technology

[0003] In the actual work of the traditional power relay, the armature or the yoke is prone to fall off, resulting in a shortened life of the relay. In addition, in harsh environments such as vibration or when the working voltage is too high, the reed is easy to deform, especially when it is often used. There is no limit for the open static spring, and it is more prone to deformation, which leads to the over-travel variation of the product and causes the relay to fail and burn.

With the development of miniaturization of power relays, the space structure is limited, the creepage distance is short, and the withstand voltage value is not high, which affects the withstand voltage performance and other comprehensive performance of the product

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