CN201387819Y

CN201387819Y - Permanent magnetic operating mechanism of electric switch

Info

Publication number: CN201387819Y
Application number: CN200920093270U
Authority: CN
Inventors: 李相权
Original assignee: Individual
Current assignee: Individual
Priority date: 2009-03-27
Filing date: 2009-03-27
Publication date: 2010-01-20
Anticipated expiration: 2019-03-27

Abstract

The utility model relates to the field of high, medium and low voltage electric switches, in particular to a permanent magnetic operating mechanism of an electric switch, which comprises a magnetic yoke body consisting of an upper magnetic yoke, a lower magnetic yoke, an inner magnetic yoke and an outer magnetic yoke, wherein a permanent magnet is arranged between the inner magnetic yoke and the outer magnetic yoke; the outer magnetic yoke is internally provided with a brake closing and opening coil with a skeleton; and a T-type movable iron core is arranged at the center of the skeleton of the brake closing and opening coil, and connected with a transmission shaft by a thread. The permanent magnetic operating mechanism of the electric switch is characterized in that a brake-opening compression spring is arranged inside a concave cavity formed by the movable iron core and the lower magnetic yoke; when the movable iron core moves downwards to a brake-closing position, the brake-opening compression spring is compressed for storing energy; and when brake-opening current passes through the brake closing and opening coil, and the movable iron core moves to a brake-opening position under the action of a brake-opening electromagnetic force, the brake-opening compression spring instantaneously releases energy, so as to accelerate the brake-opening movement of the movable iron core, namely the brake-opening movement speed of a moving contact in a vacuum arcing chamber is increased, the arc time of the contact in the vacuum arcing chamber is shortened, and therefore the using life of the vacuum arcing chamber is prolonged.

Description

The electric switch permanent-magnet manipulating mechanism

Technical field

The utility model relates to high, medium and low voltage electric switch field, is a kind of appliance switch permanent-magnet manipulating mechanism.

Background technology

Existing electric switch permanent-magnet manipulating mechanism is simple in structure with it, parts are few, the reliability height, advantages such as production cost is low and be widely used in height, in, in the low-voltage power system, its weak point is: when the moving iron core of electric switch permanent-magnet manipulating mechanism, by closing a floodgate when move in the separating brake position, owing to close, the branch brake current that switching winding passed through is less, therefore the separating brake electromagnetic force is also little, promptly moving iron core separating brake movement velocity is lower, the movement velocity of while by the vacuum interrupter moving contact that moving iron core is driven decreases, when causing the vacuum arc-extinguishing chamber contact separating brake arcing time long, shortened useful life of vacuum interrupter greatly.

Summary of the invention

The purpose of this utility model is, a kind of moving iron core that can improve permanent-magnet manipulating mechanism is provided, by the electric switch permanent-magnet manipulating mechanism that closes a floodgate to separating brake position movement velocity.

The purpose of this utility model is realized by following scheme:

This electric switch permanent-magnet manipulating mechanism includes the yoke body of upper magnet yoke, lower yoke, inner yoke, outer yoke composition, between inner yoke and outer yoke, be provided with permanent magnet, in outer yoke, be provided with band the closing of skeleton, switching winding, the moving iron core of T type places and closes, the center of switching winding skeleton, and the moving iron core of T type is threaded with power transmission shaft.Its special character is: be provided with the separating brake stage clip in the cavity of moving iron core and lower yoke formation, when moving iron core moves downward closing position, the separating brake stage clip is compressed energy storage, when close, switching winding is when the branch brake current, moving iron core is under the effect of separating brake electromagnetic force, when move in the separating brake position, separating brake stage clip abrupt release energy, accelerated the separating brake movement velocity of moving iron core, promptly accelerated the separating brake movement velocity of vacuum interrupter moving contact, shorten the vacuum arc-extinguishing chamber contact arcing time, therefore prolonged the useful life of vacuum interrupter.

Description of drawings

Figure one is an electric switch permanent-magnet manipulating mechanism structure cross-sectional schematic.(gate-dividing state)

Figure two is an electric switch permanent-magnet manipulating mechanism structure cross-sectional schematic.("on" position)

Embodiment

With reference to figure one, the electric switch permanent-magnet manipulating mechanism has the yoke body of upper magnet yoke 2, outer yoke 3, lower yoke 10, inner yoke 5 compositions.Outer yoke 3 is connected with upper magnet yoke 2, lower yoke 10, be provided with permanent magnet 6 between inner yoke 5 and the outer yoke 3, in outer yoke 3, be provided with band the closing of skeleton, switching winding 9, the moving iron core 4 of T type places and closes, the center of switching winding 9 skeletons, the moving iron core 4 of T type is connected with power transmission shaft 1, is provided with separating brake stage clip 8 in the cavity 7 that moving iron core 4 and lower yoke 10 form.

With reference to figure one and figure two, the course of work of electric switch permanent-magnet manipulating mechanism is:

"on" position: the moving iron core 4 of T type is by former figure one position, to close, switching winding 9 adds forward current, make the moving iron core 4 of T type move to figure two positions, form closed magnetic circuit by the S utmost point of the N utmost point → inner yoke 5 → moving iron core 4 → lower yoke 10 → outer yoke 3 → permanent magnet 6 of permanent magnet 6.Both formed the stable state when closing a floodgate, the power transmission shaft 1 that is connected with the moving iron core 4 of T type drives transmission device makes electric switch be in closing position.

Gate-dividing state: the moving iron core 4 of T type is by former figure two positions, to close, switching winding 9 adds reverse current, make the moving iron core 4 of T type move to figure one position, form closed magnetic circuit by the S utmost point of the N utmost point → inner yoke 5 → moving iron core 4 → upper magnet yoke 2 → outer yoke 3 → permanent magnet 6 of permanent magnet 6.Stable state when both forming separating brake, the power transmission shaft 1 that is connected with the moving iron core 4 of T type drives transmission device makes electric switch be in the separating brake position.

Claims

1. the electric switch permanent-magnet manipulating mechanism includes the yoke body of upper magnet yoke, lower yoke, inner yoke, outer yoke composition, between outer yoke and inner yoke, be provided with permanent magnet, in outer yoke, be provided with band the closing of skeleton, switching winding, the moving iron core of T type places and closes, the center of switching winding skeleton, the moving iron core of T type is threaded with power transmission shaft, it is characterized in that: be provided with the separating brake stage clip in the cavity of moving iron core and lower yoke formation.