Cooling structure for cooling a stator core of a rotating electrical machine and method of manufacturing the cooling structure

A cooling structure for cooling a stator core of a rotating electrical machine, the cooling structure comprising:

• a stator core arranged along an outer periphery of a rotor fixed to a rotary shaft of a rotating electrical machine;
• a stator frame extending along an outer peripheral surface of the stator core, the stator frame being configured to fix and support the stator core from the outer peripheral surface side thereof and
• a motor case having small-diameter end portions on both sides in an axial direction of the rotary shaft, the small-diameter end portions being welded with airtightness onto an outer peripheral surface of the stator frame so that the motor case forms a space, which is a coolant flow path, together with the outer peripheral surface of the stator frame
• wherein the motor case comprises:
• an extending portion formed at an end portion on one of both sides in the axial direction of the rotary shaft, the extending portion extending inward in a radial direction of the rotating electrical machine;
• and
• one of a bearing portion and a rotation detector for the rotary shaft, which is provided at an end of the extending portion.

A cooling structure for cooling a stator core of a rotating electrical machine, the cooling structure comprising:

• a stator core arranged along an outer periphery of a rotor fixed to a rotary shaft of a rotating electrical machine;
• a stator frame extending along an outer peripheral surface of the stator core, the stator frame being configured to fix and support the stator core from the outer peripheral surface side thereof and
• a motor case having small-diameter end portions on both sides in an axial direction of the rotary shaft, the small-diameter end portions being welded with airtightness onto an outer peripheral surface of the stator frame so that the motor case forms a space, which is a coolant flow path, together with the outer peripheral surface of the stator frame
• wherein the motor case comprises:
• a flow path portion extending along an outer periphery of the stator frame, the flow path portion being configured to form the coolant flow path together with the outer peripheral surface of the stator frame;
• and
• flange portions formed at both ends of the flow path portion in the axial direction of the rotary shaft, the flange portions being welded to the stator frame
• an extending portion formed at an end portion on one of both sides in the axial direction of the rotary shaft, the extending portion extending inward in a radial direction of the rotating electrical machine;
• and
• one of a bearing portion and a rotation detector for the rotary shaft, which is provided at an end of the extending portion.

A cooling structure for cooling a stator core of a rotating electrical machine, the cooling structure comprising:

• a stator core arranged along an outer periphery of a rotor fixed to a rotary shaft of a rotating electrical machine;
• a stator frame extending along an outer peripheral surface of the stator core, the stator frame being configured to fix and support the stator core from the outer peripheral surface side thereof;
• and
• a motor case having small-diameter end portions on both sides in an axial direction of the rotary shaft, the small-diameter end portions being welded with airtightness onto an outer peripheral surface of the stator frame so that the motor case forms a space, which is a coolant flow path, together with the outer peripheral surface of the stator frame,
• wherein the motor case comprises, at an end portion on side in the axial direction of the rotary shaft, an extending portion extending inward in a radial direction of the rotating electrical machine, and
• wherein the extending portion is fixed to a rotating electrical machine supporting member with a fixing member.