Axial gap rotating electrical machine and manufacturing method for the same

4:

• An axial gap rotating electrical machine according to comprising:
• a rotor;
• a stator which includes a stator iron core, the stator iron core including:
• a core back having a hollow-disc shape;
• and
• a plurality of teeth, which axially extend from one axial surface of the core back, and are arrayed circumferentially, the plurality of teeth having distal ends axially facing the rotor;
• a housing having a bottom with which another axial surface of the core back is in contact;
• and
• a fixing member configured to press the one axial surface of the core back toward the bottom;
• wherein a groove that is open to a slot side is formed so as to extend to a radially inner end in a portion of the core back which faces the slot being a space between circumferentially adjacent teeth, as well as a radially inner portion, and
• wherein the fixing member includes:
• a radially-inner-side fixing portion that is fixed to the bottom on a radially inner side of the core back;
• and
• a hook portion that is fixed to the radially-inner-side fixing portion and in contact with one axial surface in the groove.

5:

• An axial gap rotating electrical machine according to comprising:
• a rotor;
• a stator which includes a stator iron core, the stator iron core including:
• a core back having a hollow-disc shape;
• and
• a plurality of teeth, which axially extend from one axial surface of the core back, and are arrayed circumferentially, the plurality of teeth having distal ends axially facing the rotor;
• a housing having a bottom with which another axial surface of the core back is in contact;
• and
• a fixing member configured to press the one axial surface of the core back toward the bottom;
• wherein a groove that is open to a slot side is formed so as to extend to a radially outer end in a portion of the core back which faces the slot being a space between circumferentially adjacent teeth, as well as a radially outer portion, and
• wherein the fixing member includes:
• a radially-outer-side fixing portion that is fixed to the bottom on a radially outer side of the core back;
• and
• a hook portion that is fixed to the radially-outer-side fixing portion and in contact with one axial surface in the groove.

6:

• An axial gap rotating electrical machine according to claim 5,
• wherein the core back includes:
• a core back body in which the groove is formed;
• and
• a thick portion protruding from the core back body in a direction opposite to the direction in which the tooth extends from the core back body, and
• wherein the thick portion is arranged so as to overlap with the groove as seen in an axial direction.

7:

• An axial gap rotating electrical machine according to claim 1,
• wherein a groove that is open to a slot side is formed so as to extend in a radially entire part in a portion of the core back which faces the slot being a space between circumferentially adjacent teeth, and
• wherein the fixing member includes:
• a radially-inner-side fixing portion that is fixed to the bottom on a radially inner side of the core back;
• a radially-outer-side fixing portion that is fixed to the bottom on a radially outer side of the core back;
• and
• a pressing portion that is fixed to the radially-inner-side fixing portion and the radially-outer-side fixing portion and in contact with one axial surface in the groove.

10:

• An axial gap rotating electrical machine according to claim 1,
• wherein the core back includes:
• a core back body having the plurality of teeth;
• and
• a radially-inner-side overhanging portion extending radially inward from the core back body, and
• wherein the fixing member is in contact with one axial surface in the radially-inner-side overhanging portion.

11:

• An axial gap rotating electrical machine according to claim 10, wherein the fixing member includes:
• a radially-inner-side fixing portion that is fixed to the bottom on a radially inner side of the radially-inner-side overhanging portion;
• and
• a hook portion that is fixed to the radially-inner-side fixing portion and in contact with one axial surface in the radially-inner-side overhanging portion.

12:

• An axial gap rotating electrical machine according to claim 10, wherein the fixing member includes:
• a radially-inner-side fixing portion having a hollow-disc shape and fixed to the bottom on a radially inner side of the radially-inner-side overhanging portion;
• and
• a pressing portion that is fixed to the radially-inner-side fixing portion and in contact with one axial surface in the radially-inner-side overhanging portion.

13:

• An axial gap rotating electrical machine according to claim 1,
• wherein the core back includes:
• a core back body having the plurality of teeth;
• and
• a radially-outer-side overhanging portion extending radially outward from the core back body, and
• wherein the fixing member is in contact with one axial surface in the radially-outer-side overhanging portion.

14:

• An axial gap rotating electrical machine according to claim 13, wherein the fixing member includes:
• a radially-outer-side fixing portion that is fixed to the bottom on a radially outer side of the radially-outer-side overhanging portion;
• and
• a hook portion that is fixed to the radially-outer-side fixing portion and in contact with one axial surface in the radially-outer-side overhanging portion.

15:

• An axial gap rotating electrical machine according to claim 13, wherein the fixing member includes:
• a radially-outer-side fixing portion having a hollow-disc shape and fixed to the bottom on a radially outer side of the radially-outer-side overhanging portion;
• and
• a pressing portion that is fixed to the radially-outer-side fixing portion and in contact with one axial surface in the radially-outer-side overhanging portion.