CN201171024Y

CN201171024Y - Driving mechanism for permanent magnet type contactor

Info

Publication number: CN201171024Y
Application number: CNU2008200311496U
Authority: CN
Inventors: 吴纪福; 蒋力; 张春荣
Original assignee: JIANGSU ZHONGJIN ELECRIC EQUIPMENT CO Ltd
Current assignee: JIANGSU ZHONGJIN ELECRIC EQUIPMENT CO Ltd
Priority date: 2008-01-29
Filing date: 2008-01-29
Publication date: 2008-12-24
Anticipated expiration: 2018-01-29

Abstract

The utility model relates to a permanent magnet contactor operating mechanism which comprises an external magnetic yoke forming a magnetic loop, a coil installed in the magnetic loop, an internal magnetic yoke fixed at the coil, T-shaped armature plugged in the internal magnetic yoke and in the coil, an operating rod which is connected with the T-shaped armature in a fixed way and a permanent magnet which is arranged between the external magnetic yoke and the internal magnetic yoke. The permanent magnet contactor operating mechanism is characterized in that slots are symmetrically arranged at the edge of the T-shaped armature from top to bottom, and the slots are two at least. The permanent magnet contactor operating mechanism is slotted on the T-shaped armature, thereby increasing the circulating path of air, being capable of effectively exhausting or complementing the air at the bottom of the T-shaped armature in time and reducing the movement resistance of the T-shaped armature, so as to ensure that the operating rod is under the stable and reliable working state. Therefore, the permanent magnet contactor operating mechanism has the advantages of reasonable structure, reliable performance and good energy-saving effect.

Description

Permanent magnetism type contactor operation device

Technical field

The utility model relates to a kind of contactor, especially relates to a kind 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.The permanent magnetism type contactor that development in recent years is got up 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 on permanent magnet between the inside and outside yoke etc. and form.Though this contactor has advantages such as economize on electricity, noiseless, poly-magnetic is effective, but the gap between its armature and coil and the inner yoke is very little, when armature moves down in coil and inner yoke, because the air between armature top and the outer yoke in the space can't be discharged, air is compressed, and has increased the resistance that armature moves downward, and causes the exciting current that must improve coil, increase electromagnetic force, could guarantee that armature moves into place; When armature moves upward, because the air between armature top and the outer yoke in the space can not get replenishing, cause parital vacuum, stop armature to move upward, need to improve the pulsed field magnetization electric current and could guarantee that the armature disjunction puts in place, stability, reliability when causing using are not ideal enough, also waste electric energy simultaneously.

Summary of the invention

For solving the deficiencies in the prior art, the purpose of this utility model is to provide a kind of electric energy of not only saving, and can reduce the armature motion resistance, guarantees the permanent magnetism type contactor operation device of reliable and stable work.

To achieve these goals, the utility model is to realize by following technical scheme:

A kind of permanent magnetism type contactor operation device, comprise the outer yoke that constitutes magnetic loop, be installed in wherein coil, be fixed on inner yoke on the coil, be inserted in T type armature in inner yoke and the coil hole, and the actuating bar that is connected of T type armature and be arranged in permanent magnet between the outer yoke, the neighboring that it is characterized in that described T type armature has groove from top to bottom symmetrically.

Aforesaid permanent magnetism type contactor operation device is characterized in that described groove is at least 2.

Aforesaid permanent magnetism type contactor operation device is characterized in that the interface of described inner yoke and T type armature is made the groove inner concave, and described outer yoke forms the boss that stretches into coil in order to the contact position that contacts with T type armature bottom.

Aforesaid permanent magnetism type contactor operation device 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.

The beneficial effects of the utility model are: the utility model is owing to slot on T type armature, increased the circulation path of air, can discharge timely and effectively or the air of additional T type armature bottom, reduce the moving resistance of T type armature, thereby guarantee that the actuating bar is in reliable and stable operating state.Therefore, the utlity model has the advantage of rational in infrastructure, dependable performance, good energy-conserving effect.

Description of drawings

Fig. 1 is a permanent magnetism type contactor operation device structure cross-sectional schematic of the present utility model;

Fig. 2 is the upward view of the T type armature among Fig. 1;

Fig. 3 is the cutaway view of the T type armature among Fig. 1.

Embodiment

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

Fig. 1 is a permanent magnetism type contactor operation device structure cross-sectional schematic of the present utility model; Fig. 2 is the upward view of the T type armature among Fig. 1; Fig. 3 is the cutaway view of the T type armature among Fig. 1.

As shown in the figure, permanent magnetism type contactor operation device of the present utility model comprises upper magnet yoke 6, side yoke 5, lower yoke 1, coil 2, inner yoke 3, permanent magnet 4, T type armature 7 and actuating bar 8.Upper magnet yoke 6, side yoke 5 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, coil 2 top fixedly inner yokes 3.Inner yoke 3 is made the downward groove inner concave of path in order to the upper surface that is connected with T type armature 7, helps exhaust; Perhaps, also can make square.T type armature 7 is inserted in the centre bore of inner yoke 3 and coil 2, and the neighboring of T type armature 7 has at least 2 grooves 10 (shown in the figure be 2, but be not limited thereto) from top to bottom symmetrically, and actuating bar 8 is connected by screw thread with T type armature 7 tops.Permanent magnet 4 is fixed between inner yoke 3 and the side yoke 5.Be shaped on the lower yoke 1 one with the suitable boss 9 in T type armature 7 bottoms, boss 9 stretches in the coil 2.

Below in conjunction with Fig. 1 the utility model realization disjunction and two conversion of operation state processes of adhesive are described.

From attracting state to the disjunction state: add the direct impulse electric current to coil 2, making the polarity of the magnetic field of T type armature 7 lower ends is the N utmost point, since with the polarity of the magnetic field on boss 9 upper surfaces of the contacted lower yoke 1 in its lower end also be the N utmost point, therefore, both repel mutually, and T type armature 7 is subjected to magnetic force to promote to move upward, contact with upper magnet yoke 6 until T type armature 7 upper ends.In this process, form parital vacuum between T type armature 7 bottoms and the lower yoke 1, extraneous air adds between T type armature 7 and the lower yoke 1 by groove 10, and preventing increases the disjunction resistance because of vacuum.At this moment, the S utmost point by the N utmost point → side yoke 5 → upper magnet yoke 6 → T type armature 7 → inner yoke 3 → 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: add the reverse impulse electric current to coil 2, making the polarity of the magnetic field of T type armature 7 lower ends is the S utmost point, because the permanent magnet 4 upper end magnetic poles in its lower end are the N utmost point, therefore both attract each other, T type armature 7 is moved downward by magneticaction, contact with lower yoke 1 boss 9 upper surfaces until T type armature 7 lower surfaces, the air between T type armature 7 bottoms and the lower yoke 1 is discharged by groove 10, and air can not increase the connection resistance because of being compressed.This moment, the S utmost point by the N utmost point → side yoke 5 → lower yoke 1 → T type armature 7 → inner yoke 3 → 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.

The utility model provides the circulation path of air owing to slot 10 on T type armature 7, has effectively reduced the moving resistance of T type armature 7, guarantees the electric switch reliable operation, and stable and reliable working performance has remarkable energy saving effect.

The foregoing description does not limit the utility model in any form, and all employings are equal to the technical scheme that mode obtained of replacement or equivalent transformation, all drop in the protection range of the present utility model.

Claims

1, permanent magnetism type contactor operation device, comprise the outer yoke that constitutes magnetic loop, be installed in wherein coil, be fixed on inner yoke on the coil, be inserted in T type armature in inner yoke and the coil hole, and the actuating bar that is connected of T type armature and be arranged in permanent magnet between the outer yoke, the neighboring that it is characterized in that described T type armature has groove from top to bottom symmetrically.

2, permanent magnetism type contactor operation device according to claim 1 is characterized in that described groove is at least 2.

3, permanent magnetism type contactor operation device according to claim 1 is characterized in that the interface of described inner yoke and T type armature is made the groove inner concave, and described outer yoke forms the boss that stretches into coil in order to the contact position that contacts with T type armature bottom.

4,, 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 according to each described permanent magnetism type contactor operation device in the claim 1 to 3.