Motor
A motor includes a rotor including a shaft centered on a vertically extending center axis, a stator radially opposite to the rotor and including coils, a bearing supporting the shaft, and a bus bar unit on an upper side in an axial direction of the stator. The bus bar unit includes bus bars including a terminal portion connected to a lead wire drawn out from the coil and a bus bar holder holding the bus bars. The terminal portion includes a slit which extends axially downward and into which the lead wire is fitted. The width of the slit is narrower than the diameter of the lead wire.
1. A motor comprising:
a rotor including a shaft centered on a vertically extending center axis;
a stator disposed radially opposite to the rotor and including a plurality of coils;
a bearing supporting the shaft;
a bus bar unit disposed on an upper side in an axial direction of the stator; and
a housing surrounding and fixing the stator; wherein
the bus bar unit includes:
a plurality of bus bars including a terminal portion connected to a lead wire drawn out from the coil; and
a bus bar holder holding the plurality of bus bars;
the terminal portion includes a slit which extends axially downward and into which the lead wire is fitted;
a width of the slit is narrower than a diameter of the lead wire;
the bus bar holder includes a protrusion protruding radially outside;
the housing includes a recess portion recessed radially outward or a radially penetrating hole portion or notch portion; and
at least a portion of the protrusion is fitted into the recess portion, the hole portion, or the notch portion.
2. The motor according to claim 1 , wherein
the lead wire extending in a radial direction is fitted into the slit; and
a circumferential width of the slit is narrower than the diameter of the lead wire.
3. The motor according to claim 1 , wherein
the housing includes a flange extending radially outward; and
a lower surface of the protrusion is in contact with an upper surface of the flange.
4. The motor according to claim 1 , wherein
the stator includes an annular stator core; and
the bus bar holder is in contact with an upper surface of the stator core.
5. The motor according to claim 4 , wherein
the housing includes a flange extending radially outward; and
the flange includes:
an extending portion extending in an axial direction on an outer circumference; and
a claw portion protruding radially inward from the extending portion and being in contact with an upper surface of the protrusion.
6. The motor according to claim 5 , wherein
the flange includes a pair of the extending portions disposed at intervals in a circumferential direction;
the housing includes the notch portion; and
the notch portion is a gap between the pair of extending portions.
7. The motor according to claim 1 , wherein
the stator includes an insulator disposed between the coil and a tooth around which a conductive wire defining the coil is wound; and
the insulator includes a lead wire holding portion that holds the lead wire.
8. The motor according to claim 1 , further comprising an intermediate member positioned between the stator and the bus bar holder, wherein
the intermediate member includes a lead wire holding portion that holds the lead wire.
9. The motor according to claim 8 , wherein the stator includes:
a plurality of teeth around which a conductive wire defining the coil is wound, and which are arranged in a circumferential direction; and
an annular core back located radially outside of the plurality of teeth;
the core back includes a groove portion recessed radially outward and axially extending on a circumferential surface;
the intermediate member includes:
an annular portion provided with the lead wire holding portion on an upper surface thereof; and
a rib protruding radially inward from a circumferential surface of the annular portion and protruding downward from an axially lower end of the annular portion; and the rib is fitted into the groove portion.
10. The motor according to claim 8 , wherein the intermediate member includes a first overhanging portion protruding radially inward in a circumferential position where the lead wire holding portion is provided.
11. The motor according to claim 8 , wherein
the lead wire holding portion holds a plurality of the lead wires; and
the intermediate member includes a second overhanging portion protruding radially inward from the lead wire holding portion.
12. The motor according to claim 11 , wherein
the lead wire holding portion includes a wall portion separating the plurality of lead wires from each other; and
the second overhanging portion is located radially inside of the wall portion.