Commutator, motor, and manufacturing method of commutator

A motor comprising:

• an armature that includes an armature core fixed to a shaft, and a coil that is formed by a conductive winding being wound about a specific location of the armature core;
• and
• a commutator to which a terminal portion of the winding forming the coil is connected, the commutator comprising:
• an insulating section that is formed in a tube shape and that includes a shaft insertion hole through which the shaft is inserted, an indented portion being formed at an end portion of the insulating section, which is at one side in an axial direction of the shaft;
• a plurality of segments that are supported at an outer peripheral portion of the insulating section and that are arrayed with a spacing from each other along a circumferential direction of the insulating section, an anchor portion being provided at an end portion of each of the segments, which is at the one side in the axial direction of the shaft;
• and
• a short-circuit wire that connects the anchor portion of one of the segments and the anchor portion of another one of the segments, at least a portion of the short-circuit wire being disposed inside the indented portion.

A manufacturing method of a commutator comprising:

• an insulating section that is formed in a tube shape and that includes a shaft insertion hole through which a shaft is inserted, an indented portion being formed at an end portion of the insulating section, which is at one side in an axial direction of the shaft;
• a plurality of segments that are supported at an outer peripheral portion of the insulating section and that are arrayed with a spacing from each other along a circumferential direction of the insulating section, an anchor portion being provided at an end portion of each of the segments, which is at the one side in the axial direction of the shaft;
• and
• a plurality of short-circuit wires each of which connects the anchor portion of one of the segments and the anchor portion of another one of the segments, at least a portion of each of the respective short-circuit wires being disposed inside the indented portion,
• the manufacturing method comprising:
• a short-circuit wire anchoring process of anchoring one end portions and other end portions of the short-circuit wires to the respective anchor portions of the segments;
• and
• a short-circuit wire pressing process of disposing the at least a portion of each of the respective short-circuit wires inside the indented portion, by pressing locations between the one end portions and the other end portions of the short-circuit wires toward an indented portion side by using a jig, after performing the short-circuit wire anchoring process.

A manufacturing method of a commutator comprising:

• an insulating section that is formed in a tube shape and that includes a shaft insertion hole through which a shaft is inserted, an indented portion being formed at an end portion of the insulating section, which is at one side in an axial direction of the shaft;
• a plurality of segments that are supported at an outer peripheral portion of the insulating section and that are arrayed with a spacing from each other along a circumferential direction of the insulating section, an anchor portion being provided at an end portion of each of the segments, which is at the one side in the axial direction of the shaft;
• and
• a plurality of short-circuit wires each of which connects the anchor portion of one of the segments and the anchor portion of another one of the segments, at least a portion of each of the respective short-circuit wires being disposed inside the indented portion,
• the manufacturing method comprising:
• a jig placement process of disposing a leading end portion of a jig inside the indented portion;
• a short-circuit wire anchoring process of anchoring one end portions and other end portions of the short-circuit wires to the respective anchor portions of the segments, while causing locations between the one end portions and the other end portions of the short-circuit wires to abut the jig;
• and,
• a jig separation process of moving the jig in a direction away from the indented portion after performing the short-circuit wire anchoring process.