JPS5915268B2 - Coreless motor rotor - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to tapping the coils of a coreless armature.

As shown in Fig. 4, in conventional coils of coreless armatures using coated conductors, the coating 5 of the coil wire 4 was peeled off over the entire circumference at the tap pull-out part A, so that the coating between the wires was removed. When wound in a single layer with high density, the thickness of the coating between adjacent strands is small, and this has the disadvantage that poor insulation is likely to occur at high temperatures or when deterioration progresses.

The present invention aims to solve the above-mentioned drawbacks. FIG. 1 shows an embodiment of the present invention, in which a covered conductor 1 is folded back at the cylindrical edge and wound in a wave pattern along the circumferential surface to form a cylindrical coreless coil 2. A disk-shaped commutator 3 is disposed at one end, and the coating 5 on the circumferential surface of the coil wire 4 is removed only at the portion 6 facing outside the folded portion at the tap pull-out portion AVC of the coil 2. It is connected to the commutator segment T by soldering.

Figure 2a shows an example of a covered conductor wire with a circular cross section, and Figure 2b shows an example of a square conductor wire. o This is to remove approximately □ to IA of the entire circumference of the strand 4. In this case, a part of the strand 4 may be cut off all together as shown in Figure 3 a, or only the coating 5 may be removed as shown in b. You can also cut it off. Peeling may be performed during winding, after winding, or at any point after increasing the density by narrowing the spacing. The present invention is configured as described above, and even after the tap portion is peeled off, the insulation between the coil wire of the tap portion and the adjacent coil wire is double covered by the adjacent pixel wire. , so there is no risk of insulation failure at the tap part, and when increasing the density, the width of the covered conductor at the tap part is the same as other parts, so the coil next to the tap part The advantage is that there is no possibility that the strands will enter the tap part and gaps will be created between the strands in the coil as a whole, and that the winding distribution will not be disturbed and a uniform rotational torque of the rotor can be obtained. be.

[Brief explanation of the drawing]

Fig. 1 is an exploded perspective view showing one embodiment of the present invention, Fig. 2a
is a sectional view 30 of the main part near the edge of the same coil as above;
3A shows an embodiment with a different cross-sectional shape of the conducting wire, FIG. is a sectional view of a main part of a conventional example. DESCRIPTION OF SYMBOLS 1... Covered conductor wire, 2... Coil, 3... Commutator, 4... 35 element wire, 5... Covering, 6... Removal part of covering, 7... Commutator segment .

Claims (1)

[Claims] 1 A cylindrical coreless coil is formed by folding the coated conductor at the cylindrical edge and winding it in a wavy manner along the circumferential surface, and at the same time, a disc-shaped commutator is arranged at one end of the coil, and a tap of the coil is formed. A rotor for a coreless motor, in which a coating on a circumferential surface of a coil wire is removed at a lead-out portion only at a portion facing the outside of the folded portion and connected to a commutator segment by soldering.