DE102005020167A1 - Electromagnetic release for an electrical installation device - Google Patents

Abstract

The invention relates to an electromagnetic release 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 upon occurrence of a short-circuit current to a movable contact lever for direct opening and a switch lock for permanent opening of the contact point. The yoke and the magnetic core are formed as a single piece U-shaped bent stamped part, whose first leg serves as a magnetic core.

Description

The The invention relates to an electromagnetic trigger for an electrical Installation device, in particular for one Circuit breaker.

Circuit breaker have an electromagnetic and a thermal release, from which the thermal trigger when an overcurrent occurs and the electromagnetic trigger contribute to the elimination of the switching device when a short-circuit current occurs. While the thermal trigger only to a latching point within a switch lock, which is coupled to a movable contact lever, to their unlatching acts, opens the electromagnetic trigger when a short-circuit current occurs, the contact lever immediately by serving; at the same time the electromagnetic activates Trigger too the switch lock, so that the switching device is permanently open.

electromagnetic trigger usually own a yoke bent to a box shape, a coil, a magnet armature and surrounding a magnetic core, wherein the armature and the magnetic core inside a bobbin are included; The magnetic core is as an independent rotary part attached to the yoke leg, which faces the contact lever, so that when the short-circuit current of the core helps, the To pull anchor into the interior of the coil, so that the striker can act on the contact lever.

One Such electromagnetic trigger is in the switch S2 the company ABB Stotz contact GmbH, Heidelberg, used.

task The invention is an electromagnetic release of the to simplify the aforementioned type.

These Task is inventively characterized solved, that the yoke and the magnetic core formed as a one-piece, U-shaped bent punched part is, whose first leg serves as a magnetic core.

While at the known arrangement of the magnetic core by its own rotary part is formed, 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 as such readily serve as a magnetic core, so that a pronounced core is eliminated.

According to one Another embodiment of the invention can serve on serving as the core first leg a retraction towards the other thigh be provided, which has an opening to the leadership a switching pin connected to the armature; thereby the core is formed by a depression in the first leg.

Instead of such a recess can also be a notch or deflection be provided according to the claim 4 projecting parallel to the bridge of the yoke to the other leg out. This training is formed at the free end of the first leg.

The Bend can be U-shaped be, with the web of the U-shape parallel to the Jochsteg runs and project the legs of the deflection perpendicular to it; according to a another embodiment can the other leg facing the ends of the deflection with a Be provided end plate, in which there is an opening through the the striker reaches through and guided therein.

at The design without the end plate can be the Fetelfeder reach into the area between the legs of the bend, so that the thighs partially surround the fetlock spring; at a Other embodiment is the restraint between the gradation between the first and second section of the striker and the end plate.

Especially at the last execution can a coil tube may be provided, the inner diameter of the outer diameter the end plate corresponds and that for guiding the armature with the switching pin serves.

Further advantageous embodiments and improvements are the other Subclaims remove.

Based the drawing, in which some embodiments of the invention are shown, the invention and further advantageous Embodiments and improvements of the invention as well as further advantages explained in more detail and to be discribed.

It demonstrate

1 and 2 two different embodiments of an electromagnetic tripping without coil,

3 to 6 different embodiments of the yoke and

7 and 8th different embodiments of an anchor with striker.

It should first be referred to the 5 ,

One electromagnetic trigger is formed, as mentioned above, from a magnetic yoke, a coil, an armature and a core, wherein with the anchor a striker is connected, the immediate on the contact lever of an electrical circuit breaker acts.

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

In the execution according to 5 serves the first leg 12 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 thigh 13 has a circular segment-shaped recess 15 in which, as shown below, the armature is supported and guided.

At the Jochsteg 11 is a V-shaped notch 16 provided a surface 17 has, 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 serves without further measures as a magnetic core; in the execution according to 6 is located at the Jochsteg 11 , the yoke bridge 11 of the 5 identically corresponds, a first leg 18 and a thigh 13 corresponding second leg, which is also the reference numeral 13 has received the similarities with the execution after 5 display.

The first leg 18 has a confiscation in its middle 19 , which has a pot shape whose bottom 20 to the thigh 13 is directed towards and from the inner surface of the first leg 18 to the second leg 13 projects. The bottom of the pot 20 has an opening 21 that of the opening 14 corresponds and through which the striker of an anchor is guided. The depression 19 is effected by a deep drawing process.

The 3 shows a further embodiment of the invention. A yoke 30 has a first leg 31 and a second leg 32 , the thigh 13 of the 5 and 6 equivalent. Furthermore, at the Jochsteg 33 a notch 34 provided that the notch 16 of the 5 equivalent.

On the first leg 31 is a bend 35 provided, which has a U-shape, the Ausbiegungssteg 36 parallel to the Jochsteg 33 runs. At the Ausbiegungssteg 36 are Ausbiegungsschenkel 37 . 38 molded, which is perpendicular to the Ausbiegungssteg 36 and thus also perpendicular to the Jochsteg 33 run, 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 The U-shape is used to guide a switch pin (see below) and a restraining spring (see also below).

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

While in the execution after 3 , as well as in the embodiments according to the 5 and 6 the first leg 31 . 12 . 18 is applied directly against the adjacent end edge of the yoke, is in the embodiment according to 4 the first leg with the yoke bar only over the bend or notch 44 connected so that between the first yoke leg 42 and the Jochsteg 41 a gap remains.

The free end of the first yoke leg has a deflection 45 with two thighs 46 and 47 with a partially visible bridge section 48 are connected; at the end edges of the thighs 46 and 47 there is a cover plate 49 that with the bridge section 48 is connected or integrally formed by that they are perpendicular to the web 48 runs. This end plate 49 has a passage opening 50 in which a striker of an electromagnetic armature is guided.

The embodiment according to the 3 to 6 show a magnetic yoke on which the magnet armature is formed directly and directly.

The 1 to 6 show different configurations and configurations of a magnetic yoke; Of course, it is also possible, the magnetic yoke according to 2 with the deflection to the Bil tion of the fixed contact piece and the 4 regarding the yoke legs as in 5 or in 6 shown. Conversely, the execution of the yoke leg 49 with the deflection 44 also be used with a notch instead of training, such. B. in the 3 with the reference number 34 shown.

in this respect can the individual different configurations with each other easy be combined.

It is now referred to the 7 ,

This shows a magnet armature 70 that a hit pen 71 comprising a first section 72 and a second section 73 has, which both have different diameters. To the first section 72 around is a sheet metal part 74 made of magnetically conductive material, which covers the first section 72 only partially surrounds. At the two ends of the first section 72 are circumferential, radially projecting strips 75 and 76 formed, the outer diameter of the first section with the attached sheet metal part 74 corresponds, so the sheet metal part 74 recorded on the first section. In addition, the first section is a confiscation 77 , which extends in the axial direction, provided so that the sheet metal part 74 on the first section 72 is held.

In the execution according to 8th is a hit pen 80 with a first section 81 and a second section 82 provided, both of which have different diameters. The first paragraph 81 is from a sheet metal tube 83 surrounded, which consists of magnetically good conductive material and thus forms the anchor. The second section then works, as does the section 73 according to the execution 7 , directly on the movable contact piece or the movable contact lever of the circuit breaker, in which the electromagnetic release is used.

The execution according to 1 shows the magnetic yoke 30 with the magnet armature 70 according to 7 ; the striker 73 protrudes over the first yoke leg 31 out and between the ledge 75 and a stop in the region of the two legs 37 and 38 there is a restraining spring 90 , which after a release the anchor moves back to its original position or with the example, the triggering behavior of the trigger can be adjusted.

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

The magnet armature together with the shackle spring 91 is from a coil tube 92 surrounded, which in the recess 15 (please refer 1 ) is guided and the inner diameter of the outer diameter of the outer contour 49a of the circular part of the end plate corresponds.

at all embodiments is the circuit breaker associated with arc quenching in the area of the outer surface of the Jochsteges; the yoke's free thighs jump towards the front of the circuit breaker.

Claims (9)

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 switch lock for permanent opening of the contact point, characterized in that the yoke and the magnetic core is formed as an integrally U-shaped bent stamped part, whose first leg serves as a magnetic core. Electromagnetic trigger according to claim 1, characterized characterized in that on the magnetic core forming the first leg a recovery in the direction of the other leg is provided, the an opening to the leadership the anchor and / or a striker connected to the anchor, which directly on the movable contact piece or contact lever of the contact point acts. Electromagnetic trigger according to claim 1, characterized characterized in that on the first leg a notch or Bend is formed parallel to the bridge of the yoke to the other, second leg protrudes. Electromagnetic trigger according to claim 3, characterized characterized in that the deflection is U-shaped, wherein the Ausbiegungssteg runs parallel to the Jochsteg and the open side of the Bend away from the yoke bridge. Electromagnetic actuator according to claim 4, characterized in that the deflection at its end facing the other leg has a cover plate which is perpendicular to the Ausbiegungssteg runs, the Ausbiegungsschenkel covered and has a passage for the anchor pin connected to the anchor. Electromagnetic release according to one of the previous Claims, characterized in that the striker has a first section with a larger diameter which is magnetic from an anchor element forming the armature conductive material is at least partially surrounded. Electromagnetic trigger according to claim 6, characterized characterized in that the anchor element is a sheet metal part, the first part of the striker at least partially surrounds. Electromagnetic trigger according to claim 6, characterized characterized in that the anchor element has a cylindrical shape, in the interior of the first section inserted and held therein is. Electromagnetic trigger according to claim 8, characterized in that the anchor element forms a cup shape whose open side points to the core and out of the striker with his second section protrudes with a smaller diameter.