DE1055105B - Inductor, especially for telecommunication purposes - Google Patents

Description

GERMAN

The invention relates to inductors as used in particular in telecommunications systems for paging purposes will.

Such inductors usually have a body with an induction coil and one of the poles of the iron body limited recess in which a permanent magnet rotor is rotatably mounted is.

It is known to assemble the iron body of such an inductor from two stacked laminated cores, wherein extensions are provided on the sheets of a package, which form the core for the induction coil form, which can be pushed onto the extensions.

In a known inductor of this type, the extensions forming the core for the induction coil take place of the laminated core in the assembled state such a position that the coil after several Sides protrudes from the laminated core. The inductor therefore takes up a large amount of space and continues to do so the disadvantage of an irregular shape that requires complicated housings.

The invention 'now relates to an inductor, in particular for telecommunication purposes, with one inside at least two laminated cores, existing iron body rotatably mounted, designed as a pole wheel magnet Rotor, with a part of the sheets of dfer packets is provided with extensions that form the core for the Form induction coil.

The invention aims to avoid the disadvantages listed above and achieves this purpose by that only the sheets lying in the middle of the laminated cores are provided with extensions and that Furthermore, these extensions are arranged at such a distance from the upper edge of the sheets, that the coil placed on it does not protrude beyond the laminated core on any side.

The inductor designed according to the invention is thus formed by the cut edges lying smoothly next to one another of the sheets, their smooth profiles and the coil. The result is a cube-shaped, compact one Body that has a relatively small footprint and is easier to use and Housing that can be manufactured cheaply is permitted. The low space requirement of the inductor is particularly advantageous, because inductors are mostly used as built-in parts in devices and their space requirements are therefore significantly reduced the space requirements of the device concerned.

In the case of iron bodies made up of layered sheets, means are required which press the sheets firmly together. In known inductors, rigid plates are placed on the boundary of the laminated cores and are pressed onto the metal sheets by means of screw bolts. These plates contain inductor,
especially for telecommunication purposes

Applicant:

Siemens & Halske Aktiengesellschaft,

Berlin and Munich,
Munich 2, Witteisbacherplatz 2

Helmuth Hahn, Munich-Großhadern,

Friedrich Sommer and Werner Lehmann, Munich,

have been named as inventors

at the same time bearing for the rotor axle. It is known that very large thickness crowns sometimes occur in metal sheets, as a result of which greater differences can arise in the dimensions perpendicular to the sheet metal planes in the case of bodies stacked together, since the tolerances of the individual sheets add up. If now contain the mentioned plates bearing for a shaft, the sheets must either be carefully screened to thicknesses or dimensions of the plate packages are adapted to one another by interposing ¹ of spacers, as canting of the plates would lead to the jamming of the shaft in the bearings. These measures make the production of an inductor with layered laminated cores, not insignificantly, more expensive.

According to a further inventive concept, these disadvantages are avoided in that at least one of the plates for pressing the laminated core together has a rigid middle part, which is the bearing for contains the rotor axis, and has flexible tabs with through holes for the above-mentioned Bolts are provided. The use of at least one such plate will result in Tolerances are compensated by the flexible tabs, the complex measures that are required for rigid panels are therefore superfluous.

In the figures, the invention is shown on the basis of an exemplary embodiment. The understanding Parts not required by the invention are omitted.

1 shows a stack of laminations made up of a plurality of laminations. While designated with 1 Sheet only one in a protruding one

809 790/239

Claims (2)

Partly arranged, essentially semicircular recess, through which the pole face is formed, has, the sheets designated 2 are additionally equipped with extensions 3, which are pushed into the induction coil as a core. The sheets 2 are arranged in the middle of the laminated core, which is supplemented by sheets 1 arranged on both sides of these sheets in such a way that the induction coil pushed over the extensions 3 does not protrude beyond the outer surfaces of the laminated core. 2 shows a plate which is used to press the metal sheets together and which has a rigid center piece 5 carrying the bearing 7 for the rotor axis and flexible tabs 6 extending therefrom, in which through-holes are arranged through which the fastening means compressing the laminated cores, such as bolts, are inserted through. The advantage of a plate designed in this way has already been explained earlier. You can place plates on both end faces of the laminated core, as shown in FIG. In certain cases, however, it will be sufficient to use only one such plate, while the second plate can be designed as a rigid component in a known manner. Even by using just one such plate, the tolerances can be sufficiently compensated for in certain cases and the rotor axis can be prevented from jamming. 3 shows a section through an assembled inductor which is equipped with the laminated cores designed according to the invention. The cut is made roughly through the middle of the spool. The figure clearly shows that the coil does not protrude above the laminated core. If one considers the section A-B according to FIG. 3 shown in FIG. 4, the compact construction of the inductor, by means of which an essentially cube-shaped body is created, becomes clear. Patent claims: 1. Inductor, especially for telecommunication purposes, with inside one of at least two laminated cores existing iron body rotatably mounted rotor designed as a pole wheel magnet, some of the sheets of the packs being provided with extensions, which form the core for the induction coil form, characterized in that only those lying in the middle of the laminated core Sheets (2) are provided with extensions (3) and that these extensions continue in one such a distance from the upper edge of the sheets are arranged that the placed on them The coil (8) does not protrude beyond the laminated core on either side. 2. Inductor according to claim 1, characterized in that the laminated cores by simultaneously the bearings for the bearing plates containing the rotor axis are held together, of which at least a rigid middle part (5) with a bearing (7) for the rotor axis and flexible tabs (6) with through holes for the fasteners pressing the bleoh packets together owns. Considered publications:
French Patent No. 778 101;
British Patent Specification Nos. 453 152, 672 140. 1 sheet of drawings ® 80Ϊ 7907239 4.59