Permanent magnet type magnetic keeping locking mechanism

Abstract

The invention discloses a permanent magnet type magnetic keeping locking mechanism, comprising a permanent magnet mechanism, an armature mechanism and a self-aligning pull rod buffering mechanism. Thepermanent magnet mechanism comprises a magnetic shell, and a permanent magnet, an iron core and a tripping coil arranged in the magnetic shell. The armature mechanism comprises a closing armature ofa contactor closing electromagnet and a cover. The self-aligning pull rod buffering mechanism comprises a pull rod, a buffer spring and an electromagnet angle plate. According to the invention, the permanent magnetic force is used as the self-closing keeping force, long-term power supply is not required, and the locking mechanism is energy-saving and highly-efficient; few parts are used, and the locking mechanism is simple in structure, low in cost, free of wearing, long in service lifetime and free of maintenance; a skeleton-free coil is adopted, so risks of a brake separation failure and damage and burning of a separating coil are avoided; the self-aligning pull rod which is capable of slightly swinging and has a buffering function is used and can be automatically aligned when being engaged with the armature without manual adjustment, and the reliability is high; and the armature structure with the cover is adopted, so foreign matters are prevented from entering the suction surface of the permanent magnet, the protection level is improved, and the failure of the closing self-closing lock is avoided.

Description

technical field [0001] The invention relates to the technical field of vacuum contactors, and in particular relates to a permanent magnet magnetic holding locking mechanism. Background technique [0002] At present, the control methods used by vacuum contactors include electromagnetic holding and mechanical self-locking holding. Usually, the service life of the mechanical self-locking device determines the overall service life of the vacuum contactor, but the maintenance-free life of the vacuum contactor with self-locking function that is common in the existing market does not exceed 100,000 times, and the half-shaft buckle type is usually used. Locking mechanism, when opening, the half shaft is driven by the tripping electromagnet to rotate to trip and open. Due to the complex locking mechanical structure, low wear resistance, stability and protection level, the opening action of the contactor is prone to failure and cannot be powered off. The opening and tripping coils ar...

AI Technical Summary

Problems solved by technology

Due to the complex locking mechanical structure, low wear resistance, stability and protection level, the opening action of the contactor is prone to failure and cannot be powered off. The opening and tripping coils are often burned and failed, and even cause electrical fires. bring more loss

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