Motor and method of manufacturing motor

Abstract

A motor may include a stator having coil groups of plural phases and a connector, the stator comprising a plurality of split stators. Each of the split stators may include a split core having an arc-shaped core back section and a tooth section, an insulator, a coil which has a lead-out line that is connected to the connector. The insulator may have a first void extending between a first inner wall and a first outer wall. The first inner wall may have a lead-in groove. The stator may have a support ring disposed on the upper side of the first void. The support ring may have a second void extending between a second inner wall and a second outer wall. A plurality of lead-out lines of different phases may respectively accommodated in the first void and the second void.

What is claimed is: 
     
         1 . A motor comprising:
 a rotor that is supported so as to be able to rotate around an axis of rotation; and   a stator that is formed into a cylindrical shape and having coil groups of plural phases and a connector, the stator comprising a plurality of split stators,   wherein each of the split stators comprises:   a split core having an arc-shaped core back section configured to connect with an arc-shaped core back section of another split core and a tooth section which extends toward the inside in a radial direction from the core back section,   an insulator which covers the tooth section and at least a portion of the core back section,   a coil which has a lead-out line that is connected to the connector, and is wound around the tooth section with the insulator interposed therebetween, and
 wherein the insulator has, at a portion which covers an upper surface in an axial direction of the core back section, a first inner wall which extends in a circumferential direction, a first outer wall which is disposed further to the outside in the radial direction than the first inner wall and extends in the circumferential direction, and a first void which extends in the circumferential direction between the first inner wall and the first outer wall, 
 the stator further has a support ring which is disposed on the upper side in the axial direction of the first void, 
   the support ring has a bottom portion which extends in the circumferential direction, a second inner wall which extends in the circumferential direction on an upper surface in the axial direction of the bottom portion, a second outer wall which is disposed further to the outside in the radial direction than the second inner wall and extends in the circumferential direction, and a second void which extends in the circumferential direction between the second inner wall and the second outer wall,   a plurality of lead-out lines of different phases is respectively accommodated in the first void and the second void, wherein the first void is filled with resin.   
     
     
         2 . The motor according to  claim 1 , wherein the support ring has a through-hole penetrating in the axial direction at the lower side in the axial direction of the second void,
 the second void is filled with resin, and   the through-hole overlaps the first void in the axial direction.   
     
     
         3 . The motor according to  claim 2 , wherein at the same circumferential position as the through-hole in the second void, a width of the second void is made narrow further on the upper side in the axial direction than the lead-out line accommodated in the second void. 
     
     
         4 . The motor according to  claim 3 , wherein the resin filled in the first void and the resin filled in the second void are connected through the through-hole. 
     
     
         5 . The motor according to  claim 1 , wherein the support ring has a leg portion which extends axially downward from a lower surface of the bottom portion, and
 the leg portion is disposed in the first void and immersed in the resin.   
     
     
         6 . The motor according to  claim 1 , wherein the first inner wall has a lead-in groove recessed toward the lower side in the axial direction, at an upper surface in the axial direction, the lead-out line which is accommodated in the first void is accommodated in the first void through the lead-in groove from the coil. 
     
     
         7 . The motor according to  claim 1 , wherein a distance between the bottom portion and the first inner wall is smaller than a wire diameter of the lead-out line.