A stator core is sandwiched between a first frame and a second frame. A fastening member fastens the first frame and the second frame. The first frame includes a ring flange that is in contact with an attachment surface of the motor attachment portion. The flange includes a fixing portion fixed to the attachment surface and a fastening portion, which receives fastening force by the fastening member. The first frame includes a deform suppression portion for suppressing deformation of the fixing member when the fastening member is fastened.
1. A motor comprising:
a first frame assembled with a motor attachment portion;
a second frame;
a stator core sandwiched between the first frame and the second frame; and
a fastening member that fastens the first frame and the second frame, wherein
the first frame includes a ring flange that extends radially outward and extends along a whole circumference of the first frame,
the ring flange is in contact with an attachment surface of the motor attachment portion,
the ring flange includes a fixing portion fixed to the attachment surface and a fastening portion, which receives fastening force by the fastening member,
the first frame includes a deform suppression portion for suppressing deformation of the fixing portion when the fastening member is fastened,
the ring flange includes a small diameter portion,
the fixing portion projects radially outward from the small diameter portion,
the fixing portion forms a generally triangle having a width that extends along a peripheral direction, wherein the width of the triangle decreases toward radially outward,
the fastening portion is arranged in the fixing portion,
the fixing portion includes a screw insertion hole to which a screw is inserted, wherein the screw threadably engages with the attachment surface,
the fastening portion includes a fastening hole to which the fastening member is inserted or threadably engaged, and
the fastening hole is arranged at a position radially inside the screw insertion hole, wherein the position of the fastening hole is offset in the peripheral direction from the fixing portion.
2. The motor according to claim 1 , wherein
the fastening portion is arranged in the fixing portion.
3. The motor according to claim 1 , wherein
the deform suppression portion is arranged in the fixing portion.
4. The motor according to claim 1 , wherein
the fastening portion is arranged in the small diameter portion.
5. The motor according to claim 1 , wherein
the first frame is shaped to be a tube and has a bottom portion, and
the deform suppression portion includes a reinforcement rib arranged on an axial inner surface of the bottom portion.
6. The motor according to claim 5 , wherein
the reinforcement rib is arranged at a position radially inside the fastening portion.
7. A motor comprising:
a first frame assembled with a motor attachment portion;
a second frame;
a stator core sandwiched between the first frame and the second frame; and
a fastening member that fastens the first frame and the second frame, wherein
the first frame includes a ring flange that extends radially outward and extends along a whole circumference of the first frame,
the ring flange is in contact with an attachment surface of the motor attachment portion,
the ring flange includes a fixing portion fixed to the attachment surface and a fastening portion, which receives fastening force by the fastening member,
the first frame includes a deform suppression portion for suppressing deformation of the fixing portion when the fastening member is fastened,
the fixing portion includes a screw insertion hole to which a screw is inserted, wherein the screw threadably engages with the attachment surface,
the fastening portion includes a fastening hole to which the fastening member is inserted or threadably engaged, and
the deform suppression portion includes a recessed portion formed between the fastening hole and the screw insertion hole.