Winding – tensioning – or guiding – Composite article winding – On externally toothed core
Patent
1994-05-04
1996-05-14
Mansen, Michael R.
Winding, tensioning, or guiding
Composite article winding
On externally toothed core
310 51, 418151, 29598, 29901, 242 705R, 74573R, H02K 1509, H02K 524, F04C 200
Patent
active
055160549
DESCRIPTION:
BRIEF SUMMARY
TECHNICAL FIELD
This invention relates to a method of winding an armature coil, and more particularly to a technique of winding a coil around an armature core having balancers, which is effective in use for winding a coil around an armature in production of, for example, a motor to be mounted on a vehicle.
BACKGROUND ART
In production of a motor to be mounted on a vehicle, taking into account unbalance which is generated in a rotor of the motor when a load on the motor is, for example, a pump having an eccentric cam portion, disk-shaped balancers each having an eccentric portion away from a rotary center may be mounted on opposite sides of an armature core respectively. Both balancers are mounted on the outer periphery of a rotor shaft such that the centers of both balancers and a center of the rotor shaft are substantially contained in one plane. Mounting the balancers on opposite sides of the armature core, the rotational unbalance generated by the eccentric cam portion of the pump can be offset.
Conventionally, however, when coils are wound around the armature core, to the opposite sides of which the balancers are mounted, the coils are wound from optional slots of the armature core, and in the case that windings of the coils are started from such slots that the wires become in contact with the eccentric portions of the balancers, the coils are bulged outwardly by the eccentric portions of the balancers. Thus, as the coil wires continue to be wound in this state, they grow into portions being in contact with the outer peripheries of the balancers and portions being not in contact with them, and therefore, an unbalance mass is generated by the coil winding.
It is an object of the present invention to provide a method of winding an armature coil, which is capable of preventing an unbalance mass being produced by the coil winding.
DISCLOSURE OF THE INVENTION
In a method of winding an armature coil according to the present invention, coils are wound into slots of an armature core, which is mounted on an outer periphery of a rotor shaft of an armature; on opposite sides of the armature core, there being provided respectively disk-shaped balancers each having an eccentric portion away from a center of the rotor shaft and being mounted on the outer periphery of the rotor shaft in such a manner that the centers of both balancers and the center of the rotor shaft are substantially contained in a same plane, and balancers and their bottoms being positioned generally parallel to the center line connecting centers of both balancers and the center of the rotor shaft, i.e., a plurality of slots, angles of which are within about .+-.45.degree. to the vertical line to said center line, optional slots are designated as winding starting positions, and starting ends of the coils are disposed at these designated slots respectively, and the coils start to be wound from the slots at the winding starting positions into other slots respectively in such a manner that the coils become substantially in parallel to the above-described center line.
By the method of winding the armature coil according to the present invention as described above, when the coils are wound around the armature core, the positions away from the eccentric portions of the respective balancers are designated as the winding starting positions, and the coil are wound from the slots at these designated winding starting positions so that the coil do not come into contact with the eccentric portions in a state where the coils have been wound around the eccentric portions of both balancers. As a result, an unbalance mass by the coils can be prevented from existing in a state where the coils have been wound around the armature core.
BRIEF DESCRIPTION OF DRAWINGS
FIG. 1 is a front view showing the armature core and the winding starting positions, for explaining an embodiment of the method of winding the armature coil according to the present invention;
FIG. 2 is a side view showing the armature;
FIG. 3 is a front view showing a part of the coil during the
REFERENCES:
patent: 2714174 (1955-07-01), Applegate
patent: 3524601 (1970-08-01), Biddison et al.
patent: 4833353 (1989-05-01), Hansen
patent: 4915554 (1990-04-01), Serizawa et al.
patent: 5230616 (1993-07-01), Serizawa et al.
patent: 5251833 (1993-10-01), Furuhashi et al.
patent: 5386163 (1995-01-01), Heilman
Hagiwara Hiroshi
Iwata Masato
Machida Eiichi
Mansen Michael R.
Mitsuba Electric Manufacturing Co. Ltd.
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