CN2702435Y

CN2702435Y - A bistable operating mechanism for permanent-magnet type contactor

Info

Publication number: CN2702435Y
Application number: CN 200420058956
Authority: CN
Inventors: 杜利国
Original assignee: YANGZHONG ZHONGJIN ELECTRICAL
Current assignee: Jiangsu Zhongjin Elecric Equipment Co.,Ltd.
Priority date: 2004-03-30
Filing date: 2004-04-30
Publication date: 2005-05-25
Anticipated expiration: 2014-04-30

Abstract

The utility model relates to a structural improvement of a permanent magnet type contactor operating mechanism, which belongs to the technical field of an electric appliance switch. The mechanism is mainly composed of an outer yoke by which a magnetic circuit is formed, a coil arranged in the magnetic circuit, a T type armature inserted in the hole of the coil and a permanent magnet. The improvement is that the permanent magnet is fixed on the bottom surface of the outer yoke and is in the shape of a boss extending into the coil and being capable of contacting with the core bottom of the T type armature. When the operating mechanism of the utility model is positioned at the suction position, the core bottom of the T type armature in the coil is reliably contacted with the boss-shaped permanent magnet at the bottom of the outer yoke, the magnetic efficiency of the permanent magnet can be fully exerted, and thus an operating rod is assured to be positioned in the stable and reliable working condition. The improvement not only maintains the advantages of energy saving, no noise, etc. of a permanent magnet type contactor, but also can make full use of the magnetic efficiency of the permanent magnet. The structure is compact, the manufacturing cost is low, and the working performance is reliable. The utility model is especially suitable for the use on a small-sized permanent magnet type alternating current and direct current contactor.

Description

A kind of permanent magnetism type contactor bistable state operating mechanism

Technical field

The utility model relates to a kind of contactor that is used for control circuit, and especially a kind of architecture advances of permanent magnetism type contactor operation device belongs to the appliance switch technical field.

Background technology

Contactor is a kind of widely used electric controling switch device, and traditional common AC and DC contactor mainly is made up of moving contact rack, moving armature, static gag bit and coil etc.Coil must be switched on for a long time during this type of contactor work, not only waste electric energy, and noise is big, useful life short.In addition, the permanent magnetism type contactor that gets up of development in recent years mainly by the outer yoke that constitutes magnetic loop, be installed in coil wherein, armature and the permanent magnet that is inserted in the coil hole formed.Though this contactor has advantages such as economize on electricity, noiseless, the permanent magnet of its operating mechanism is provided with not enough science, so the magnetic usefulness utilance of permanent magnet is lower, and stability, reliability during use are not ideal enough.

Summary of the invention

Propose a kind of electric energy of not only saving, and can improve permanent magnet magnetic usefulness utilance, guarantee the permanent magnetism type contactor bistable state operating mechanism of reliable and stable work.

To achieve these goals, permanent magnetism type contactor bistable state operating mechanism of the present utility model mainly by the outer yoke that constitutes magnetic loop, be installed in coil wherein, T type armature and the permanent magnet that is inserted in the coil hole formed, its improvements are, described permanent magnet is fixed on the bottom surface of outer yoke, become to stretch into coil, can with the boss shape that contacts at the bottom of the T type armature core.

Like this, when operating mechanism of the present utility model is in the attracted position, to reliably contact with the permanent magnet of outer yoke bottom boss shape at the bottom of the core of T type armature in the coil, can give full play to the magnetic usefulness of permanent magnet, thereby guarantee that the actuating bar is in reliable and stable operating state.

It is between coil upper surface and T type armature lower surface tripping spring to be housed that the utility model further improves.Can when disjunction,, make the rapid disjunction of T type armature, and remain on stable state like this by acting force of the spring.

Above improvement of the present utility model has not only kept advantages such as permanent magnetism type contactor is energy-conservation, noiselessness, and compact conformation, can make full use of the magnetic usefulness of permanent magnet, low cost of manufacture, reliable working performance are particularly suitable for using on minitype permanent magnetism formula AC and DC contactor.

Description of drawings

Below in conjunction with accompanying drawing the utility model is further described.

Fig. 1 is the structural representation of the utility model embodiment at the disjunction state.

Fig. 2 is the structural representation of the utility model embodiment at attracting state.

Embodiment

The nonrestrictive a kind of embodiment that provides the utility model to relate in the accompanying drawing, the utility model will be further described below in conjunction with embodiment.

A kind of permanent magnetism type contactor bistable state operating mechanism of present embodiment as shown in Figure 1, by upper magnet yoke 6, side yoke 4, lower yoke 1, shaped framework coil 3, T type armature 5, permanent magnet 2 and tripping spring 7 are formed, upper magnet yoke 6, side yoke 4 and lower yoke 1 constitute by a solid connection with each other the outer yoke that forms magnetic loop, shaped framework coil 3 is installed in the outer yoke, T type armature 5 is inserted in the shaped framework coil 3, tripping spring 7 is the turriform spring, be sleeved on T type armature 5 neck root positions, its two ends are connected with the downside on T type armature 5 tops and the upper surface of shaped framework coil 3 respectively.Suitable at the bottom of the core of permanent magnet 2 with T type armature 5, and be fixed on the lower yoke 1, become to stretch into the boss shape of coil 3.

Below in conjunction with Fig. 1 and Fig. 2 present embodiment realization disjunction and two conversion of operation state processes of adhesive are described.

From attracting state to the disjunction state: coil 3 is added the direct impulse electric current, making the polarity of the magnetic field of T type armature 5 lower ends is the N utmost point, since with the contacted permanent magnet 2 in its lower end on polarity of the magnetic field also be the N utmost point, therefore both repel mutually, and T type armature 5 is subjected to magnetic force and moved upward by the thrust of tripping spring 7.This moment, the moving contact rack of contactor was in the disjunction position; After pulse current disappeared, 5 supports by tripping spring 7 of T type armature made the moving contact rack of contactor be stabilized in the disjunction position.

From the disjunction state to attracting state: coil 3 is added the reverse impulse electric current, making the polarity of the magnetic field of T type armature 5 lower ends is the S utmost point, because the permanent magnet 2 upper end magnetic poles in its lower end are the N utmost point, therefore both attract each other, the thrust that T type armature 5 is subjected to magneticaction also to overcome tripping spring 7 simultaneously moves downward, and contacts with permanent magnet 2 upper surfaces until the core bottom surface.This moment, the moving contact rack of contactor was in the attracted position; As shown in Figure 2, constituted a closed magnetic circuit,, also can overcome the active force of tripping spring 7, kept stable attracting state even after pulse current disappears by the S utmost point of the N utmost point → T type armature 5 → upper magnet yoke 6 → side yoke 4 → lower yoke 1 → permanent magnet 2 of permanent magnet 2.

Facts have proved that advantage simple in structure, that volume is little, cost is low that the utility model not only has, and reliable operation are particularly suitable for using on minitype permanent magnetism formula AC and DC contactor.

Claims

1. permanent magnetism type contactor bistable state operating mechanism, main by the outer yoke that constitutes magnetic loop, be installed in coil wherein, T type armature and the permanent magnet that is inserted in the coil hole formed, its improvements are, described permanent magnet is fixed on the bottom surface of outer yoke, become to stretch into coil, can with the boss shape that contacts at the bottom of the T type armature core.

2. according to the described permanent magnetism type contactor bistable state of claim 1 operating mechanism, it is characterized in that: describedly between coil upper surface and T type armature lower surface, tripping spring is housed.

3. according to claim 1 or 2 described permanent magnetism type contactor bistable state operating mechanisms, it is characterized in that: described outer yoke is constituted by a solid connection with each other by upper magnet yoke, side yoke and lower yoke.

4. according to the described permanent magnetism type contactor bistable state of claim 3 operating mechanism, it is characterized in that: described tripping spring is the turriform spring.