CN2702433Y

CN2702433Y - Bistable operating mechanism for permanent-magnet type contactor

Info

Publication number: CN2702433Y
Application number: CN 200420058955
Authority: CN
Inventors: 杜利国
Original assignee: Zhongjin Electrical Appliances & Equipment Co Ltd Yangzhong City
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 the structural development of the operating mechanism of a permanent magnet type contactor, belonging to the technical field of electric switch. The operating mechanism is mainly composed of an outer yoke by which a magnet circuit is formed, a coil installed in the magnet circuit, an inner yoke fixed on the coil, an armature inserted in the inner yoke and the bore of the coil, an operating rod fixedly connected with the armature and a permanent magnet arranged between the outer and inner yokes. The improvement is that the connecting face of the inner yoke and the end face of the armature is made to a groove curved face, and the outer yoke and the contact position of the core bottom of the armature and the outer yoke are made to a boss face extended into the coil. When the operating mechanism of the utility model is positioned on the operating position, the end face and the core bottom of the armature respectively contact the groove curved face of the inner yoke and the boss face of the outer yoke, the magnetic action is increased, a closed magnet circuit by which the magnetic efficiency of the permanent magnet can be fully displayed is formed, and thus an operating rod is assured to be positioned on the stable and reliable working condition. Thus, the utility model has the advantages of reasonable structure, reliable performance and good energy-saving efffect.

Description

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.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 wherein coil, be fixed on inner yoke on the coil, be inserted in armature in inner yoke and the coil hole, and the actuating bar that is connected of armature and be arranged in permanent magnet between the outer yoke form.Though this contactor has advantages such as economize on electricity, noiseless, the inner yoke of its operating mechanism does not all have magnetism-collected structure with armature place of combining and lower yoke, so the magnetic usefulness utilance of permanent magnet is lower, and stability, reliability during use are not ideal enough.

Summary of the invention

The purpose of this utility model is, proposes a kind of electric energy of not only saving, and can improve permanent magnet magnetic usefulness utilance, guarantees 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 wherein coil, be fixed on inner yoke on the coil, be inserted in armature in inner yoke and the coil hole, and the actuating bar that is connected of armature and be arranged in permanent magnet between the outer yoke form, its improvements are, the interface of described inner yoke and armature end face is made the groove inner concave, and described outer yoke is in order to make the boss face that stretches into coil with the contact position at the bottom of the armature core.

Like this, when operating mechanism of the present utility model is in the attracted position, contact with the groove inner concave of inner yoke and the boss face of outer yoke respectively at the bottom of the end face of armature and the core, increased magnet accumulating cap, formed the closed magnetic loop that to give full play to permanent magnet magnetic usefulness, thereby guaranteed that the actuating bar is in reliable and stable operating state.Therefore, this practicality has rational in infrastructure, the advantage of dependable performance, good energy-conserving effect.

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.

The permanent magnetism type contactor bistable state operating mechanism of present embodiment mainly is made up of upper magnet yoke 7, side yoke 3, lower yoke 1, coil 2, inner yoke 5, permanent magnet 4, T type armature 6 and actuating bar 8 referring to Fig. 1.Upper magnet yoke 7, side yoke 3 and lower yoke 1 constitute by a solid connection with each other an outer yoke that can form magnetic loop.Coil 2 is installed in the outer yoke, above fixing inner yoke 5.Inner yoke 5 is made the downward groove inner concave 9 of path in order to the upper surface that is connected with T type armature 6, and cone angle 2 α of this groove are 100 °～110 °.T type armature 6 is inserted in the centre bore of inner yoke 5 and coil 2, and actuating bar 8 is connected with T type armature 6 tops.Permanent magnet 4 is fixed between inner yoke 5 and the side yoke 3.Be shaped on the lower yoke 1 one with the suitable boss 10 in T type armature 6 cores bottoms.

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: solenoid 2 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 contacted lower yoke 1 boss 10 upper surfaces, 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 to promote to move upward, contact with upper magnet yoke 7 until T type armature 6 upper ends.At this moment, the S utmost point by the N utmost point → side yoke 3 → upper magnet yoke 7 → T type armature 6 → inner yoke 5 → permanent magnet 4 of permanent magnet 4 forms closed magnetic circuit.Thereby the stable state when forming disjunction is subjected to the effect of actuating bar 8, and the moving contact rack of contactor remains in the disjunction position.

From the disjunction state to attracting state: solenoid 2 is added the reverse impulse electric current, making the polarity of the magnetic field of T type armature 6 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, T type armature 6 is moved downward by magneticaction, contact with lower yoke 1 boss 10 upper surfaces until T type armature 6 lower surfaces, this moment, the S utmost point by the N utmost point → side yoke 3 → lower yoke 1 → T type armature 6 → inner yoke 5 → permanent magnet 4 of permanent magnet 4 constituted a closed magnetic circuit, thereby keep stable attracting state, be subjected to the effect of actuating bar 8, the moving contact rack of contactor remains in the attracted position.

Facts have proved that the poly-magnetic of the utility model is effective, stable and reliable working performance has remarkable energy saving effect.

Claims

1. permanent magnetism type contactor bistable state operating mechanism, mainly by the outer yoke that constitutes magnetic loop, the actuating bar that is installed in wherein coil, is fixed on inner yoke on the coil, is inserted in armature in inner yoke and the coil hole, is connected with armature and the permanent magnet that is arranged between the interior outer yoke form, it is characterized in that: the interface of described inner yoke and armature end face is made the groove inner concave, and described outer yoke is in order to make the boss face that stretches into coil with the contact position at the bottom of the armature core.

2. permanent magnetism type contactor bistable state operating mechanism according to claim 1 is characterized in that: the cone angle of described groove is 100 °～110 °.

3. permanent magnetism type contactor bistable state operating mechanism according to claim 1 and 2 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.