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US 11,146,153 B2Granted
Method of manufacturing a stator of a motor
AssigneeToyota Jidosha Kabushiki Kaisha
InventorsYu Takanezawa, Daisuke Mizushima, Rikuto Takagi
Life of this patent
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Abstract
An arm of a coil segment having an approximate U shape is placed in a slot of a stator core, and a portion protruding from the slot is bent in a circumferential direction. An arm is bent in a direction of an arrow A, and another arm positioned at an inner side in the radial direction in relation to this arm is bent in a direction of an arrow B. The arm positioned at the outer side has at least a part of a bending inner side surface of a bent portion hardened by pressurization.
Claims5
A method of manufacturing a stator of a motor, comprising:
- forming a coil segment by bending a flat type conductive wiring in an approximate U shape with two arms;
- inserting the coil segment into a slot, of a stator core having teeth arranged in a circumferential direction, between adjacent teeth, wherein the arms of the coil segments are placed to form a radial direction line arranged in a radial direction and to form a circumferential direction line arranged in the circumferential direction;
- forming a coil end portion by bending the arm of the coil segment in the circumferential direction, wherein arms belonging to the same circumferential direction line are bent in a first direction and arms belonging to a circumferential direction line adjacent to this circumferential direction line are bent in a second direction which is opposite the first direction;
- and
- welding together tips of corresponding arms, wherein
- in the forming the coil segment, at least a part of a bending inner side surface, of a portion which is bent in the forming the coil end portion, of the arms belonging to at least one circumferential direction line is pressurized and hardened.
3 more elements
Dependencies are inferred from the claim text.