CN201060749Y

CN201060749Y - Electrical equipment switch permanent-magnet control mechanism

Info

Publication number: CN201060749Y
Application number: CNU2007200936869U
Authority: CN
Inventors: 李相权
Original assignee: Individual
Current assignee: Individual
Priority date: 2007-05-11
Filing date: 2007-05-11
Publication date: 2008-05-14
Anticipated expiration: 2017-05-11

Abstract

The utility model relates to an electric appliance switch permanent magnetism operating mechanism, belonging to the high and medium voltage electric appliance switch field, which comprises a manual switching-off device and a magnetic yoke body comprising an upper magnetic yoke, a lower magnetic yoke, an inner magnetic yoke and an outer magnetic yoke. A permanent magnet is arranged between the inner magnetic yoke and the outer magnetic yoke, a electromagnetic coil with a framework is arranged in the outer magnetic yoke, a T-shaped moving iron core is arranged in the center of the framework of the electromagnetic coil, the T-shaped moving iron core is connected with a driving axle, a switching-off spring is suited on the driving axle, and the switching-off spring is arranged in a cavity on the lower end surface of the moving iron core and the cavity on the upper surface of the lower magnetic yoke. The utility model is characterized in that a cavity is arranged on the upper end surface of the upper magnetic yoke, and the diameter of the cavity is smaller than the diameter of the upper end surface of the moving iron core. Under the switching-off state, the contact area of the upper end surface of the moving iron core of the electric appliance switch permanent magnetism operating mechanism and the lower end surface of the upper magnetic yoke is decreased, the flowing magnetic flux is reduced, the residual holding power of the moving iron core is decreased along with the reduction of the magnetic flux, namely, the motion resistance of the moving iron core is decreased when the moving iron core is switched on, thus the switching-on current can be reduced.

Description

The appliance switch permanent-magnet manipulating mechanism

Technical field

The utility model relates to height, middle piezoelectricity air cock field, is a kind of appliance switch permanent-magnet manipulating mechanism.

Background technology

Existing appliance switch permanent-magnet manipulating mechanism is simple in structure with it, parts are few, advantage such as reliability height, production cost are low and being widely used in height, the intermediate voltage electric power system, its weak point is: when the appliance switch permanent-magnet manipulating mechanism is under the strong attitude of separating brake, the lower surface contact area of moving iron core upper surface and upper magnet yoke is big, it is big that magnetic flux is flow through in institute, moving iron core and upper magnet yoke residue confining force are excessive, be directed at when closing a floodgate, in the moving iron core motion process, overcome very big separating brake residue confining force, and switching current is increased thereupon.

Summary of the invention

The purpose of this utility model is, provides a kind of under the strong attitude of separating brake, and moving iron core residue confining force is little, moves iron core when closing a floodgate motion, the appliance switch permanent-magnet manipulating mechanism that required switching current is less.

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

This appliance switch permanent-magnet manipulating mechanism comprises manual switching-off device and the yoke body of being made up of upper magnet yoke, lower yoke, inner yoke, outer yoke, between inner yoke and outer yoke, be provided with permanent magnet, in outer yoke, be provided with the solenoid of band skeleton, the moving iron core of T type places the center of electromagnetic coil skeleton, the moving iron core of T type is connected with power transmission shaft, is nested with tripping spring on power transmission shaft.Its special character is: be provided with cavity in the upper magnet yoke lower surface, and the cavity diameter is less than moving iron core upper surface diameter, make the appliance switch permanent-magnet manipulating mechanism move the iron core upper surface, under the strong attitude of separating brake, with the lower surface of upper magnet yoke, contact area reduces, institute flows through magnetic flux and reduces, the residue confining force reduces thereupon, has both reduced the resistance to the motion of moving iron core combined floodgate, therefore can reduce switching current.

Description of drawings

Figure one. be appliance switch permanent-magnet manipulating mechanism structure cross-sectional schematic.(separating brake is strengthened attitude)

Figure two is an appliance switch permanent-magnet manipulating mechanism structure cross-sectional schematic.(the strong attitude of closing a floodgate)

Embodiment

With reference to figure one, the yoke body that the appliance switch permanent-magnet manipulating mechanism has manual switching-off device 1 and is made up of upper magnet yoke 2, outer yoke 9, lower yoke 10, inner yoke 5.Outer yoke 9 is connected with upper magnet yoke 2, lower yoke 10, be provided with permanent magnet 6 between inner yoke 5 and the outer yoke 9, in outer yoke 9, be provided with the solenoid 7 of band skeleton, the moving iron core 4 of T type places the center of solenoid 7 skeletons, the moving iron core 4 of T type is connected with power transmission shaft 11, be nested with tripping spring 8 on power transmission shaft, tripping spring 8 places in the cavity of the cavity of moving iron core 4 lower surfaces and lower yoke 10 upper surfaces.Be provided with cavity 3 in upper magnet yoke 2 lower surfaces, and cavity 3 diameters are less than moving iron core 4 upper surface diameters.

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

Close a floodgate and strengthen attitude: the moving iron core 4 of T type is by former figure one position, solenoid 7 is added 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 9 → permanent magnet 6 of permanent magnet 6.Both formed the stable strong attitude when closing a floodgate, the power transmission shaft 11 that is connected with the moving iron core 4 of T type drives transmission device makes appliance switch be in closing position.

Separating brake is strengthened attitude: the moving iron core 4 of T type is by former figure two positions, solenoid 7 is added 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 9 → permanent magnet 6 of permanent magnet 6.Stable strong attitude when both forming separating brake, the power transmission shaft 11 that is connected with the moving iron core 4 of T type drives transmission device makes appliance switch be in the separating brake position.

Claims

1. the appliance switch permanent-magnet manipulating mechanism includes manual switching-off device, with the yoke body of forming by upper magnet yoke, lower yoke, inner yoke, outer yoke, between outer yoke and inner yoke, be provided with permanent magnet, in outer yoke, be provided with the solenoid of band skeleton, the moving iron core of T type places the center of electromagnetic coil skeleton, and the moving iron core of T type is connected with power transmission shaft, is nested with tripping spring on power transmission shaft, it is characterized in that: be provided with cavity in the upper magnet yoke lower surface, and the cavity diameter is less than moving iron core upper surface diameter.