CN2720584Y

CN2720584Y - Electromagnetic actuator

Info

Publication number: CN2720584Y
Application number: CN 200420060523
Authority: CN
Inventors: 罗冰; 朱丹
Original assignee: Chengdu Guoguang Electric Co Ltd
Current assignee: Chengdu Guoguang Electric Co Ltd
Priority date: 2004-07-30
Filing date: 2004-07-30
Publication date: 2005-08-24
Anticipated expiration: 2014-07-30

Abstract

The utility model relates to an electromagnetic actuator, in particular to an iron core of the electromagnetic actuator. The electromagnetic actuator comprises a fixed iron core and a movable iron core; the contacting ends of the fixed iron core and the movable iron core are mutually matched in concave-convex shape; the iron core is a cylinder; the concave-convex shpe is a cone; the apex of the cone is on the axial cord of the iron core. The beneficial effects of the utility model are that the magnetic conduction area is increased, when the iron core sucking; the suction of the iron core is stronger; the vibration of the iron core is reducesd; the movable iron core has reliable motion; and the noise is reduced.

Description

Electromagnetic actuators

Technical field

The utility model relates to electromagnetic actuators, particularly the electromagnetic actuators iron core.

Background technology

Electromagnetic actuators is a kind of movement device, as the drive unit of electromagnetically operated valve, the trip gear of contactor etc.Its structure comprises coil, fixed core and moving (armature) unshakable in one's determination.Some electromagnetic actuators, fixed core center have a steam vent.Iron core shape mostly is cylinder or prism (bottom surface is square or rectangle).Fixed core is fixed on the bearing by nut.Also have with bearing itself as fixed core, in this case, the utility model with the moving bearing part that contacts unshakable in one's determination, also is referred to as fixed core during with adhesive unshakable in one's determination.Moving iron core is connected with transmission mechanism.The operation principle of electromagnetic actuators is: moving iron core is attracted by fixed core under the effect of coil magnetic field, produces mechanical movement, drives the external device (ED) action by transmission mechanism, as driving closed electromagnetic valve, makes contactor dropout etc.The electromagnetic actuators of prior art, fixed core and moving contact jaw unshakable in one's determination are the plane, the electromagnetic actuators of this structure, fixed core is little with moving contact area unshakable in one's determination, and magnetic conductive area is little, and a little less than the suction unshakable in one's determination, the electromagnetic actuators action is unreliable.Particularly when the drive current of coil was alternating current, suction changed between zero and maximum, and moving iron core then with the vibration of twice supply frequency, sends noise.Because contact-making surface unshakable in one's determination is the plane, moving unshakable in one's determination can be the center of circle with a point, follow circle swing, make adhesive instability unshakable in one's determination, and noise increased.

The utility model content

Technical problem to be solved in the utility model is exactly the shortcoming at above-mentioned prior art, provides a kind of contact jaw unshakable in one's determination to be cancavo-convex electromagnetic actuators.

The utility model solves its technical problem, and the technical scheme of employing is that electromagnetic actuators comprises fixed core and moving unshakable in one's determination; Described fixed core is the concaveconvex shape that mutual tenon closes with moving contact jaw unshakable in one's determination.

The beneficial effects of the utility model are, the magnetic conductive area when having increased adhesive unshakable in one's determination, and suction unshakable in one's determination is stronger; Reduced vibration unshakable in one's determination, moving reliable in action unshakable in one's determination, noise reduces.

Description of drawings

Fig. 1 is the electromagnetic actuators front view of prior art;

Fig. 2 is the front view of embodiment 1;

Fig. 3 is embodiment 2 moving front views unshakable in one's determination;

Fig. 4 is the vertical view of Fig. 3;

Fig. 5 is embodiment 3 moving front views unshakable in one's determination;

Fig. 6 is the vertical view of Fig. 5;

Fig. 7 is embodiment 4 moving front views unshakable in one's determination;

Fig. 8 is the vertical view of Fig. 7.

Among the figure: the 1-fixed core; 2-is moving unshakable in one's determination; The 3-bearing; The 4-nut; The 5-packing ring; The 6-coil rack; The 7-coil; 8 installing holes; The 9-steam vent.

Embodiment

Electromagnetic actuators of the present utility model according to the shape of iron core, with the contact jaw of moving iron core and fixed core, is processed into the concave-convex of shape, size coupling.During the iron core adhesive, the mutual tenon of contact jaw closes, and has increased contact area unshakable in one's determination and stability in contact.

Embodiment 1

The electromagnetic actuators that this is routine, iron core shape are cylinder, on fixed core 1 axis steam vent 9 are arranged.Fig. 1 is the electromagnetic actuators front view of prior art, and Fig. 2 is the front view of this routine electromagnetic actuators.As can be seen from the figure, moving unshakable in one's determination 2 contact jaw is processed into cone (convex), and the contact jaw of fixed core 1 is processed into conic shaped (spill), pit shape, size and moving unshakable in one's determination 2 contact jaw cone coupling.Above-mentioned conical tip is (being symmetry axis with axis unshakable in one's determination promptly) on axis unshakable in one's determination.During adhesive, moving iron core 2 is a taper seat with the contact-making surface of fixed core 1, compares with plane contact shown in Figure 1, has not only increased magnetic conductive area, has increased the suction-combining force, and this structure, and moving iron core 2 is also had positioning action, makes the iron core contact more accurate, more reliable.Reduce moving 2 vibrations unshakable in one's determination simultaneously, reduced noise.

Embodiment 2

This routine electromagnetic actuators iron core shape is positive hexagonal prism.Fig. 3, Fig. 4 are unshakable in one's determination 2 front view and vertical view respectively.Moving 2 contact jaws unshakable in one's determination are hexagonal pyramid, this hexagonal pyramid the summit on axis unshakable in one's determination.Equally, the contact jaw of fixed core 1 (not shown) is made the hexagonal pyramid pit with moving 2 contact jaw hexagonal pyramid shapes unshakable in one's determination, size coupling.

Embodiment 3

This routine electromagnetic actuators iron core shape is a four-prism.Fig. 5, Fig. 6 are unshakable in one's determination 2 front view and vertical view respectively.Moving 2 contact jaws unshakable in one's determination are rectangular pyramid, and the summit of rectangular pyramid is on axis unshakable in one's determination.The contact jaw of fixed core 1 (not shown) is made the rectangular pyramid pit with moving 2 contact jaw rectangular pyramid shapes unshakable in one's determination, size coupling.

Embodiment 4

This routine electromagnetic actuators iron core shape is that the bottom surface is the prism of rectangle.Fig. 7, Fig. 8 are unshakable in one's determination 2 front view and vertical view respectively.Moving 2 contact jaws unshakable in one's determination are rectangular pyramid, and the summit of rectangular pyramid is on axis unshakable in one's determination.The contact jaw of fixed core 1 (not shown) is made the rectangular pyramid pit with moving 2 contact jaw rectangular pyramid shapes unshakable in one's determination, size coupling.

The foregoing description all is that fixed core is done concavity, and moving iron core is made convex.In fact, conversely, fixed core is made convex, and moving iron core is done concavity, has same effect.

The foregoing description only is several common special case of the present utility model.According to principle of the present utility model, adopt this professional routine techniques, electromagnetic actuators contact jaw unshakable in one's determination can be processed into various concaveconvex shapes, as sphere, ellipsoid etc., it all belongs to protection range of the present utility model.

Claims

1. electromagnetic actuators comprises fixed core and moving unshakable in one's determination; It is characterized in that: described fixed core and moving contact jaw unshakable in one's determination are the concaveconvex shape of mutual coupling.

2. electromagnetic actuators according to claim 1 is characterized in that: described fixed core is spill; Described moving iron core is convex.

3. electromagnetic actuators according to claim 1 and 2 is characterized in that: described moving iron core and fixed core are cylinder; Described concaveconvex shape is a symmetry axis shape axisymmetricly with axis unshakable in one's determination.

4. electromagnetic actuators according to claim 3 is characterized in that: described concaveconvex shape is a cone.

5. electromagnetic actuators according to claim 3 is characterized in that: described iron core is a cylinder; Described concaveconvex shape is a cone.