WO2006117097A2

WO2006117097A2 - Electromagnetic trip device for an electrical installation device

Info

Publication number: WO2006117097A2
Application number: PCT/EP2006/003793
Authority: WO
Inventors: Jürgen Christmann; Klaus-Peter Eppe; Peter Pfirrmann; Ralf Weber
Original assignee: Abb Patent Gmbh
Priority date: 2005-04-30
Filing date: 2006-04-25
Publication date: 2006-11-09
Also published as: DE102005020167A1; EP1878037A2; WO2006117097A3; CN101218655B; CN101218655A

Abstract

The invention relates to an electromagnetic trip device, in particular for a circuit breaker, and a contact point, comprising a yoke, a coil, a magnetic core and a magnetic armature. In the event of a short circuit current, the inventive trip device acts upon a movable contact lever for directly opening the contact point and upon a switch latch for permanently opening said contact point. The yoke and the magnetic core are configured as a single-piece, U-shaped bent punched part, the first limb of which serves as a magnetic core.

Description

Electromagnetic trigger for an electrical installation device

description

The invention relates to an electromagnetic trigger for an electrical installation device, in particular for a circuit breaker.

Circuit breakers have an electromagnetic and a thermal release of which contribute to the elimination of the switching device in the event of an overcurrent and the electromagnetic release on occurrence of a short-circuit current, the thermal release. While the thermal release only acts on a latching point within a switch lock, which is coupled to a movable contact lever, to unlatch it, the electromagnetic release opens the contact lever immediately upon impact of a short-circuit current; At the same time, the electromagnetic release also actuates the switch lock so that the switching device is permanently open.

Electromagnetic actuators usually have a yoke bent into a box shape surrounding a coil, a magnet armature and a magnetic core, wherein the magnet armature and the magnet core are accommodated within a coil former are; the magnetic core is attached as a separate rotary member to the yoke leg, which faces the contact lever, so that when the short-circuit current of the core helps to pull the anchor into the interior of the coil so that the striker can act on the contact lever.

Such an electromagnetic trigger is used in the switch S2 from ABB Stotz Kontakt GmbH, Heidelberg.

The object of the invention is to simplify an electromagnetic release of the type mentioned.

This object is achieved in that the yoke and the magnetic core is formed as a one-piece, U-shaped bent stamped part, whose first leg serves as a magnetic core.

While in the known arrangement, the magnetic core is formed by a separate rotary member, the magnetic core with the yoke forms an integral component which can be produced in one operation.

According to one embodiment of the invention, the leg can serve as such as a magnetic core without further notice, so that a pronounced core is eliminated.

According to a further embodiment of the invention can be provided on the serving as the core first leg a recovery in the direction of the other leg, which has an opening for guiding a connected to the armature switch pin; As a result, the core is formed by a depression in the first leg.

Instead of such a recess, a notch or deflection may be provided, which protrudes parallel to the web of the yoke to the other leg according to claim 4. This training is formed at the free end of the first leg. The deflection may be U-shaped, wherein the web of the U-shape is parallel to the Jochsteg and project the legs of the deflection perpendicular to it; According to a further embodiment, the ends of the bend facing the other leg may be provided with a cover plate in which there is an opening through which the striker pin engages and is guided.

In the embodiment without the end plate, the fetlock spring can reach into the area between the legs of the deflection, so that the legs partially surround the restraining spring; in another embodiment, the fetlock spring is between the stepping between the first and second portions of the striker and the end plate.

In particular, in the last embodiment, a coil tube may be provided, whose inner diameter corresponds to the outer diameter of the end plate and which serves to guide the armature with the switching pin.

Further advantageous embodiments and improvements can be found in the further subclaims.

Reference to the drawing, in which some embodiments of the invention are shown, the invention and further advantageous refinements and improvements of the invention and other advantages to be explained and described.

Show it

FIGS. 1 and 2 show two different embodiments of an electromagnetic release without a coil,

Figures 3 to 6 different embodiments of the yoke and

Figures 7 and 8 different embodiments of an armature with

Striker.

First, refer to FIG. 5. An electromagnetic actuator is formed, as mentioned above, of a magnetic yoke, a coil, an armature and a core, wherein the armature is connected to a striker, which acts directly on the contact lever of an electrical circuit breaker.

5 shows a first embodiment of a yoke 10 according to the invention. This yoke has a yoke web 11, on which two yoke legs 12 and 13 are formed, the yoke legs 12, 13 forming a U-shape together with the yoke web.

In the embodiment of FIG. 5, the first leg 12 serves as a magnetic core, wherein in the leg 12, an opening 14 is provided, through which a striker (see below) can reach through. The other leg 13 has a kreissegmentför- shaped recess 15 in which, as shown below, the armature is mounted and guided.

At Jochsteg 11 a V-shaped notch 16 is provided, which has a surface 17 which is used as a fixed contact piece for the circuit breaker use. To arrange such a notch for the fixed contact piece on a yoke, is prior art and not relevant to the present invention.

The first leg 12 of the yoke 10 is used without further measures as a magnetic core; in the embodiment of FIG. 6 is located on the yoke web 11, which corresponds to the yoke land 11 of FIG. 5 identically, a first leg 18 and a leg 13 corresponding second leg, which has also received the reference numeral 13 to the similarities with the Embodiment of FIG. 5 represent.

The first leg 18 has approximately in its center a recess 19 which has a cup shape whose bottom 20 is directed towards the leg 13 and which projects from the inner surface of the first leg 18 to the second leg 13. The pot bottom 20 has an opening 21 which corresponds to the opening 14 and through which the striker pin of an armature is guided. The recess 19 is effected by a deep drawing operation. Fig. 3 shows a further embodiment of the invention. A yoke 30 has a first leg 31 and a second leg 32 which corresponds to the leg 13 of Figures 5 and 6. Furthermore, a notch 34 is provided on the Jochsteg 33, which corresponds to the notch 16 of FIG. 5.

On the first leg 31, a deflection 35 is provided which has a U-shape, the Ausbiegungssteg 36 parallel to the yoke 33. At the Ausbiegungssteg 36 Ausbiegungsschenkel 37, 38 are formed, which are perpendicular to the Ausbiegungssteg 36 and thus perpendicular to the Jochsteg 33, also perpendicular to the yoke legs 31 and 32; they jump in the same direction as the yoke legs 31 and 32.

The interior 39 of the U-shape serves to guide a switching pin (see below) and a restraining spring (see also below).

4 shows a U-shaped yoke 40, with a yoke web 41, on which a first yoke leg 42 and a second yoke leg 43 are integrally formed. Between the first yoke leg and the Jochsteg 41 is a V-shaped formation 44, which corresponds to the formation 16 and to which a fixed contact piece is attached.

While in the embodiment of FIG. 3, as well as in the embodiments of Figures 5 and 6, the first leg 31, 12, 18 abuts directly against the adjacent end edge of the yoke, in the embodiment of FIG. 4, the first leg with the Jochsteg only connected via the bend or notch 44, so that between the first yoke leg 42 and the yoke 41, a gap remains.

The free end of the first yoke leg has a bend 45 with two legs 46 and 47, which are connected to an only partially visible web portion 48; At the end edge of the legs 46 and 47 is a closing plate 49 which is connected to the web portion 48 and is integrally formed thereon so as to be perpendicular to the web 48. This end plate 49 has a passage opening 50 in which a striker of an electromagnetic armature is guided. The embodiment according to FIGS. 3 to 6 show a magnetic yoke, on which the magnet armature is directly and directly molded.

Figures 1 to 6 show different shapes and configurations of a magnetic yoke; Of course, it is also possible to design the magnetic yoke according to FIG. 2 with the deflection for forming the fixed contact piece and FIG. 4 with respect to the yoke legs as shown in FIG. 5 or in FIG. Conversely, the embodiment of the yoke leg 49 with the bend 44 can also be used with a notch instead of the formation, e.g. represented by the reference numeral 34 in FIG.

In that regard, the individual different configurations can be easily combined with each other.

Reference is now made to FIG. 7.

This shows a magnet armature 70, which has a striking pin 71, which has a first portion 72 and a second portion 73, which have two different diameters. Around the first portion 72 around a sheet metal part 74 is placed from magnetically conductive material, which surrounds the first portion 72 only partially. At the two ends of the first portion 72 circumferential, radially projecting strips 75 and 76 are formed, whose outer diameter corresponds to the first portion with the attached sheet metal part 74, so that the sheet metal part 74 is held on the first section. In addition, the first portion is provided with a recess 77 which extends in the axial direction, so that the sheet metal part 74 is held on the first portion 72.

In the embodiment of FIG. 8, a striker 80 is provided with a first portion 81 and a second portion 82, both having different diameters. The first portion 81 is surrounded by a metal tube 83, which consists of magnetically good conducting material and thus forms the anchor. The second section then acts, just like the section 73 of the embodiment according to FIG. movable contact piece or the movable contact lever of the circuit breaker, in which the electromagnetic release is used.

The embodiment of Figure 1 shows the yoke 30 with the armature 70 of FIG. 7. the striker 73 protrudes beyond the first yoke leg 31 and between the bar 75 and a stop in the region of the two legs 37 and 38 is a restraining spring 90 which moves back to its original position after triggering the anchor or with the example Tripping behavior of the shutter can be adjusted.

In the embodiment according to FIG. 3, the yoke 40 with the end plate 49 is used as the yoke, the armature is that according to FIG. 8 with the striking pin 80 and the first section 81 and the second section 82 as well as the cylindrical sheet metal part 83, which consists of magnetically conductive material and thus together with the striker 80 forms the anchor; between the end plate 49 and the gradation between the first and the second portion of the striker 80 is a restraining spring 91 corresponding to the restoring springs 90.

The magnet armature together with the restraint spring 91 is surrounded by a coil tube 92, which is guided in the recess 15 (see FIG. 1) and whose inner diameter corresponds to the outer diameter of the outer contour 49a of the circular part of the end plate.

In all embodiments, the sheet switch associated Leichtbo- genlöschbleche is in the region of the outer surface of the yoke bridge; the free legs of the yoke project towards the front of the circuit breaker.

Claims

claims

1. Electromagnetic trigger for in particular a circuit breaker and a contact point, which has a yoke, a coil, a magnetic core and a magnet armature, which acts on the occurrence of a short-circuit current to a movable contact lever for direct opening and a latch for permanent opening of the contact point, characterized in that the yoke and the magnetic core are designed as a stamped part bent in one piece in the form of a U, the first leg of which acts as a magnetic core.

2. Electromagnetic actuator according to claim 1, characterized in that at the magnetic core forming the first leg a recovery in the direction of the other leg is provided, which serves as an opening for guiding the armature and / or an anchor connected to the striker, which directly on the movable contact piece or contact lever or contact point acts.

3. Electromagnetic actuator according to claim 1, characterized in that on the first leg a notch or bend is formed, which projects parallel to the web of the yoke to the other, second leg out.

4. Electromagnetic actuator according to claim 3, characterized in that the deflection U-shaped, wherein the Ausbiegungssteg runs parallel to the Jochsteg and the open side of the deflection points away from the yoke.

5. Electromagnetic release according to claim 4, characterized in that the deflection at its end facing the other leg welißt a cover plate, which is perpendicular to the Ausbiegungssteg, the Ausbiegungsschenkel covered and a passage for the anchor connected to the Seh lag pin has.

6. Electromagnetic actuator according to one of the preceding claims, characterized in that the striker has a first portion of larger diameter, which is at least partially surrounded by an anchor element forming the armature of magnetically conductive material.

7. Electromagnetic actuator according to claim 6, characterized in that the anchor element is a sheet metal part, which surrounds the first portion of the striker pin at least partially.

8. Electromagnetic actuator according to claim 6, characterized in that the anchor element has a cylindrical shape, in the interior of which the first portion is inserted and held therein.

9. Electromagnetic actuator according to claim 8, characterized in that the anchor member forms a cup shape, the open side facing the core and protrudes from the striker with its second portion of smaller diameter.