Motor with stator segments having coupling parts with recesses and gaps
A motor of an embodiment includes a rotor and a stator. The stator includes a plurality of segments. The segment includes a plurality of pieces coupled via a coupling part. The plurality of pieces are disposed in an arc shape. The plurality of segments are disposed in an annular shape. The coupling part includes a first recess part, a pair of opposing surfaces having first ends continuous with both sides of the first recess part, and a pair of opposing parts provided at second ends of the pair of opposing surfaces. A mutual gap between the pair of opposing surfaces decreases from the first recess part to the pair of opposing parts.
1 . A motor, comprising:
a rotor; and
a stator, wherein
the stator includes a plurality of segments coupled via engaging parts,
the segment includes a plurality of pieces coupled via a coupling part,
the plurality of pieces are disposed in an arc shape,
the plurality of segments are disposed in an annular shape,
the coupling part includes a first recess part, a pair of opposing surfaces having first ends continuous with both sides of the first recess part, and a pair of opposing parts provided at second ends of the pair of opposing surfaces, and
a clearance between the pair of opposing surfaces decreases from the first recess part to the pair of opposing parts,
the pair of opposing surfaces are planes,
the pair of opposing parts oppose each other by being in contact with one another or via a clearance, and
the clearance in an inner peripheral side between the pair of opposing surfaces is smaller than the clearance in an outer peripheral side between the pair of opposing surfaces.
2 . The motor according to claim 1 , wherein the pair of opposing parts are a pair of opposing lines parallel to a rotation axis direction of the motor.
3 . The motor according to claim 1 , wherein in the coupling part, the first recess part is provided inward of a radial direction of the motor, and a second recess part is provided outward of the radial direction and opposes the first recess part.
4 . The motor according to claim 1 , wherein
a design center as a center of bending rotation in the plurality of pieces is set in the coupling part, and an imaginary point is set outside the design center in a radial direction, and
the pair of opposing surfaces are disposed on a pair of straight lines connecting the imaginary point and the pair of opposing parts.
5 . The motor according to claim 4 , wherein the design center and the imaginary point are disposed on a straight line passing through a center of the motor and running along the radial direction.
6 . The motor according to claim 5 , wherein
a first imaginary circle passing through a design joining point with the design center as a center is set,
a pair of second imaginary circles having predetermined radii are set with points on a tangent line of the first imaginary circle as centers, and
the pair of opposing surfaces are disposed on tangent lines in contact with the pair of second imaginary circles from the imaginary point.
7 . The motor according to claim 6 , wherein a region at an inner peripheral side relative to the pair of opposing surfaces is disposed on the pair of second imaginary circles.