DE2225385A1 - COIL FOR CABLE, WIRE OR. DGL - Google Patents

Description

"Coil for cables, wires or the like. L 'The invention relates to Reels for cables, wires or the like, in particular on machine reels. She-concerns the storage of the coil core of such coils can be inserted axially into the core on both sides Journal.

When using such coils, ever higher speeds are used. This means that the coils run smoothly and have the least possible imbalance. The VDI guideline usually applies to the permissible concentricity deviation (eccentricity) 2060. According to this, the permissible run-out deviation should åe according to the required reel speed of the coil core are less than 0.1 mm.

This low tolerance has so far not been achieved in practice if The coil core, as usual, is mounted on bearing journals that can be inserted into it on both sides. In this case it is between the outside diameter of the journal and the inner diameter of the core a tolerance of about 0.25 mm is necessary because otherwise the rapid dumping by mechanical, hydraulic or electrical means moving journal is not easily possible. On top of that, in practice neither the bearing journal on the outside nor the coil core on the inside is always completely free of contamination, e.g. from dust. For this reason, too, the tolerance of about 0.25 mm has hitherto been necessary been considered.

Another problem with cylindrical storage is that because of the tolerance the circumferential surfaces of the bearing journals (outside) and of the coil core (inside) are different. This is due to the fact that with a tolerance of 0.25 mm and with a journal diameter of 127.00 mm after about 500 revolutions of the Journal has made one turn more than the coil core.

This leads to an expansion of the tolerance, and consequently to an increase the imbalance.

The purpose of the invention is to provide a remedy here. This exists in that for each of the two bearing journals the coil core has two oppositely conical, associated with concentrically arranged bearing rings slotted in the axial direction are, of which by axial pressure the inner one together, therefore on the bearing pin is compressible, the outer expandable, and thus pressed against the surrounding coil core is.

When inserting the bearing journals, axial pressure is applied to the outer slotted bearing ring is exercised, it is shifted axially inwards somewhat, wherein he presses the iimer slotted bearing ring together with the effect that this sits on the bearing journal without play. At the same time, the outer bearing ring is somewhat widened and pressed against an end cover, which has a hub of the coil core, e.g.

screwable, is.

According to the invention, therefore, not only has progress been achieved that the coil core sits on the bearing pin with no play when it rotates, hence the danger an imbalance is prevented.

There is the further advantage that this success is built on is achieved in a very simple and effective manner, namely essentially only with the help of two, concentrically seated, slotted Sagerrings.

The inventive proposal is preferably veruirkllcht such that a hub with a larger clear width connects to the core on both sides and one with it connectable cover with a neck piece protrudes into it and an inner outer ring the outer bearing ring detected with axial play.

In a further development of the invention, a proposal is that the outer bearing ring by acial acting pressure members, e.g.

by coil springs embedded in it, when opening into the starting position is movable.

Further features, details and advantages of the invention result can be derived from the following description of a preferred exemplary embodiment as well based on the drawing. It shows: Big. 1 shows a partial section through a machine spool for the wire processing industry; Fig. 2 is a partial view in the direction of the arrow A.

In the illustrated embodiment, the coil has the two coil discs a and b on and the bobbin c. The coil core d sits on the bearing journal e the machine.

According to the invention, the storage takes place by means of an inner slotted one Bearing ring f, which tapers conically on the outside outwards, and by means of a outer slotted bearing ring g, which tapers conically on the inside inwards.

The coil core d merges into a hub h of greater clearance.

The cover i is connected to this, e.g. by means of the screws k. The journal e has a radially protruding disc 1, by means of which axial pressure in the direction of the arrow when inserting the bobbin in the machine A is exerted against the outer bearing ring g. This shifts this bearing ring slightly inwards, compressing the inner bearing ring f, which as a result, As already mentioned, it comes to sit fully on the bearing journal e without play. While the compression of the inner bearing ring f is when it is axially inwardly displaced the outer bearing ring g widened somewhat and against the inner surface of the lid i pressed, which in turn, as already mentioned, with the hub h of the coil core connected, e.g. screwed.

When ventilating, when the bearing journals e move axially outwards are, the outer bearing ring shifts g under the action of the inserted into it Coil springs m also slightly outwards, with the result that the inner Bearing ring f can go back to its original position, i.e. expand.

As the drawing shows, the axial play is the outer one Bearing ring g is small, because its outer ring n snaps into an annular groove o des Cover i a, is therefore only back and forth according to the width of this annular groove.

Claims (4)

Claims 1. Storage of coils for cables, wires or the like. axially on both sides in the coil core insertable bearing journals, characterized in that for each of the two bearing journals to the spool core two oppositely conical, in the axial direction slotted, concentrically arranged bearing rings are assigned by which by axial pressure the inner one can be pressed together, therefore on the bearing pin, the outer expandable, and therefore can be pressed against the surrounding coil core. 2. Storage according to A-nspruch 1, characterized in that the outer Bearing ring when inserting the bobbin into the machine by a radially protruding one Disc of the journal is displaceable in the axial direction. 3. Storage according to claim 1 and 2, characterized in that on the coil core is connected to a hub of greater clearance on both sides and one with it connectable cover with a neck piece protrudes into it and an inner outer ring of the outer bearing ring detected with axial play. 4. Storage according to one of claims 1 to 3, characterized in that that the outer bearing ring is supported by axially acting pressure members, e.g. helical springs, when opening the journal is axially displaceable in the starting position.