Stator for rotary electric machine and manufacturing apparatus thereof

Abstract

A stator for a rotary electric machine includes a stator coil configured such that a tip end of a conductor segment bent in a stator circumferential direction is joined to a tip end of another conductor segment in the same phase. A conductive material is exposed from the tip ends of the conductor segments, and a distance between the tip ends in different phases and adjacent to each other in the stator circumferential direction is larger than a distance between the tip ends in the same phase and adjacent to each other in the stator circumferential direction.

What is claimed is: 
     
         1 . A stator for a rotary electric machine, the stator comprising:
 a stator core including slots provided at a plurality of positions in a circumferential direction; and   a stator coil configured such that a tip end of a conductor segment projecting from a stator-core axial end surface of each of the slots and bent in the circumferential direction of the stator core is joined to a tip end of another conductor segment in the same phase,   a conductive material being exposed from the tip ends of the conductor segments, and a distance between the tip ends in different phases and adjacent to each other in the circumferential direction of the stator core being larger than a distance between the tip ends in the same phase and adjacent to each other in the circumferential direction of the stator core.   
     
     
         2 . The stator for the rotary electric machine, according to  claim 1 , wherein
 a distance between the conductor segments in different phases and adjacent to each other in the circumferential direction of the stator core is larger than a distance between the conductor segments in the same phase and adjacent to each other in the circumferential direction of the stator core.   
     
     
         3 . A manufacturing apparatus for a stator for a rotary electric machine, the manufacturing apparatus comprising:
 a jig configured to bend, in a stator-core circumferential direction, conductor segments projecting from stator-core axial end surfaces of slots provided in a stator core,   the jig including a first jig configured to bend one conductor segment out of the conductor segments in the same phase and adjacent to each other in the stator-core circumferential direction, and a second jig configured to bend the other conductor segment,   the second jig being configured to bend the other conductor segment such that a tip end of the other conductor segment approaches a tip end of the one conductor segment at a time when the first jig bends the one conductor segment.   
     
     
         4 . The manufacturing apparatus for the stator for the rotary electric machine, according to  claim 3 , wherein
 the first jig includes a protrusion configured to bend the one conductor segment; and   the protrusion includes a tilting surface configured to abut with the tip end of the one conductor segment and to tilt and bend the one conductor segment in the circumferential direction, and a position defining surface configured to define a position of the tip end of the one conductor segment after the one conductor segment is bent.   
     
     
         5 . A stator for a rotary electric machine, the stator comprising:
 a stator core including slots provided at a plurality of positions in a circumferential direction; and   a stator coil configured such that a tip end of a conductor segment projecting from a stator-core axial end surface of each of the slots and bent in the circumferential direction of the stator core is joined to a tip end of another conductor segment in the same phase,   a distance between the tip ends in different phases and adjacent to each other in the circumferential direction of the stator core being larger than a distance between the tip ends in the same phase and adjacent to each other in the circumferential direction of the stator core.