CH651705A5 - WINDING DEVICE FOR WINDING STATORS WITH ELECTRICAL MACHINES PROVIDED WITH WINDING HEAD SUPPORTS. - Google Patents

Description

The invention relates to a winding device for winding stators provided with winding head supports of electrical machines with a wire guide head that can be screwed into an intermittently rotatable and axially displaceable hollow winding rod and has an axial bore.

In the known stator winding machines, winding forms are required for the winding of the coils, via which the individual turns of the coil are slidably guided to form the winding head. The winding forms must be inserted into the laminated core, positioned and locked in it, and after the winding has been completed unlocked again and removed from the stator. Before the wound stator is removed from the winding machine, the windings of the coils on the coil heads must be fixed by hand, for example using adhesive strips. In order to enable such stator winding machines to be integrated into transfer lines, for example, to fix the winding heads of the field coil package, winding head supports were attached to the stators, each of which protrudes from the stators in the region of the poles from the end face of the laminated core as ring segments. As a result, the wound stators can be removed from the stator winding machine immediately after the winding process and removal of the winding forms without additional manipulations.

A disadvantage, however, is that complex, precisely adapted winding shapes are required for each stator bore.

Another disadvantage can be seen in the fact that the winding forms cannot ensure cross-wire laying of the winding heads.

It is an object of the invention to provide a winding device with which stators with different diameters can be wound in a simple and safe manner and without crossing.

The above object is achieved by the invention defined in claim 1.

Due to the winding device according to the invention with an axially movable wire guide head with rotatable winding nozzles, the complex winding forms previously required, including the corresponding clamping, unclamping and locking elements, are unnecessary when winding stators, as a result of which the production time can be reduced.

By eliminating the locking elements to be counted in the prior art, the distances provided for this purpose between the laminated core and the inside of the winding overhangs are no longer required, as a result of which the winding overhang can be made flatter and thus the overall height of the electric motor is reduced and the copper consumption for the winding is reduced can be.

The winding device according to the invention ensures a precise, layer-by-wire laying of the winding directly on the walls of the winding head supports, as a result of which a higher fill factor is achieved with the same slot cross section.

The invention will be explained in more detail below using an exemplary embodiment.

It shows

Figure I is a perspective view of the winding device according to the invention during the winding process of a stator, and

2 shows a longitudinal section of the winding device and the stator, with the wire guide head pulled out of the stator.

According to FIG. 1, the winding process of a stator 8 is shown in such a way that a wire guide head 20 penetrates the stator bore, with winding wires 14, 14 '(FIG. 2) being fed through the wire guide head 20 through a hollow winding rod 1 through winding wire nozzles 7, 7' . According to FIG. 2, the wire guide head 20 is screwed into the hollow winding rod 1 with a hollow fastening flange 2 and is flanged with its end face to an intermediate piece 3 having a bearing holder 5. On the bearing bracket 5, two opposing bearings 6, 6 'are preferably arranged, which are penetrated radially by hollow winding nozzles 7, 7'. Permanent magnets 12, 12 'are provided on the end face of the bearings 6, 6', the radially outer ends of which protrude from the bearings 6, 6 '. The winding nozzles 7, 7 'are bent axially outside of the bearings 6, 6' by approximately 90 ° and are rotatably supported in the bearings 6, 6 'by means of guide bushes 11, 11'. At the exit of the winding nozzles 7, T from the bearings 6, 6 ', reset pieces 13, 13' are arranged in a flag-like manner, a part of the reset pieces 13, 13 'covering the permanent magnets 12, 12' with an air gap.

For a better understanding, it is pointed out that in FIG. 2 the impression could arise that the distance between the two winding nozzles 7, 7 'to one another does not match the inner diameter of the laminated core 9. However, this is not the case since the inner profile of the laminated core 9 is designed such that the distance “a” is smaller than the distance “b” (FIG. 1) and the stator core after the introduction of a rotor (not shown), this with an air gap only partially covered. This makes it possible to guide the wire guide head 20 with the winding nozzles 7, 7 'through the stator lamination stack in the recess in accordance with the distance “b”. During the axial movement through the laminated core 9 and after passing through the same, there is an intermittent rotary movement of the wire guide head 20. By combining the axial movement and the intermittent rotary movement of the two winding nozzles 7, 7 ', the upper and lower windings 15, 15' can be simultaneously supported on winding head supports 10, 10 'are laid down in layers and according to shape.

If a winding wire breakage occurs, the respective permanent piece 12, 12 ′ pulls the respective reset piece 13, 13 ′ into the corresponding precise axial position, so that during the next axial movement of the

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Wire guide head 20, i.e. Pushing or pulling the same out through the laminated core 9 prevents damage to the winding nozzle 7, T which has otherwise come into an unforeseen position.

3 651705

In normal winding operation, the intermittent rotary movement of the winding nozzles 7, T takes place through the winding wires 14, 14 'penetrating them and their positive guidance in the winding head supports 10, 10'.

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2 sheets of drawings

Claims (3)

651 705 1. Winding device for winding stators of electrical machines provided with winding head supports with a wire guide head (20) which can be screwed into an intermittently rotatable and axially displaceable hollow winding rod (1) and has an axial bore (2 '), characterized in that at the front end of the wire guide head (20) a storage facility (5) is provided, to which at least two bearings (6, 6 ') are arranged with winding nozzles (7, 7') with resetting pieces (13, 13 '), which are movably mounted therein and designed as winding wire guides, and that Permanent magnets (12, 12 ') are provided on the end face of the bearings (6, 6'). 2. Wrapping device according to claim 1, characterized in that the foot ends of the winding nozzles (7, T) are designed as guide bushes (11, 11 ') and the reset pieces (13, 13') at the outlet end from the bearings (6, 6 ') are arranged so that one end each covers the permanent magnets (12, 12 ') with an air gap in the rest position. 2nd PATENT CLAIMS 3. Winding device according to claim 2, characterized in that the winding nozzles (7,7 ') mounted in the guide bushings (11, 11') are bent outside the bearings (6,6 ') by about 90 ° in the axial direction.