Motor

A motor, comprising:

• a rotor including a shaft with a center on a center axis extending in one direction;
• a stator enclosing the rotor and rotating the rotor about the center axis;
• a first bearing located at a first side in the one direction of the stator and supporting the shaft;
• a second bearing located at a second side opposite to the first side of the stator and supporting the shaft;
• a cylindrical housing holding the stator and the first bearing;
• a bus bar assembly holding the second bearing and allowing an end of the first side to be located in the housing;
• a cover fixed to the housing to cover at least a portion of the second side of the bus bar assembly;
• and
• a circuit board which is disposed between the second bearing and the cover in the one direction, and allows a surface of the second side to cross the one direction, wherein
• the bus bar assembly includes:
• a bus bar electrically connected to the stator;
• a wiring member electrically connecting an external power supply to the circuit board;
• and
• a bus bar holder holding the bus bar and the wiring member,
• the bus bar holder includes:
• a cylindrical main body portion including an opening at the second side;
• a connector portion protruding from the main body portion toward a radially outer side of the center axis;
• a bottom portion widening from an inner surface of the main body portion to the radially inner side;
• and
• a plurality of protrusion portions extending from the bottom portion toward the second side;
• the cover covers the second side of the opening;
• the wiring member includes:
• an external power-supply connection terminal provided at the connector portion to be electrically connected to the external power-supply;
• and
• a plurality of circuit board connection terminals electrically connected to the surface of the second side of the circuit board;
• the plurality of circuit board connection terminals is arranged along a predetermined direction at the surface of the second side of the circuit board;
• the protrusion portion includes a first protrusion portion;
• the circuit board is provided with an elongated hole portion in which the first protrusion portion is located;
• the elongated hole portion extends toward a direction connecting the center axis to the circuit board connection terminal when viewed from the one direction, or extends in the predetermined direction;
• and
• the first protrusion portion contacts an inner edge of the elongated hole portion at one end of the elongated hole portion.

A motor, comprising:

• a rotor including a shaft with a center on a center axis extending in one direction;
• a stator enclosing the rotor and rotating the rotor about the center axis;
• a first bearing located at a first side in the one direction of the stator and supporting the shaft;
• a second bearing located at a second side opposite to the first side of the stator and supporting the shaft;
• a cylindrical housing holding the stator and the first bearing;
• a bus bar assembly holding the second bearing and allowing an end of the first side to be located in the housing;
• a cover fixed to the housing to cover at least a portion of the second side of the bus bar assembly;
• and
• a circuit board which is disposed between the second bearing and the cover in the one direction, and allows a surface of the second side to cross the one direction;
• wherein
• the bus bar assembly includes:
• a bus bar electrically connected to the stator;
• a wiring member electrically connecting an external power supply to the circuit board;
• and
• a bus bar holder holding the bus bar and the wiring member,
• the bus bar holder includes:
• a cylindrical main body portion including an opening at the second side;
• a connector portion protruding from the main body portion toward a radially outer side of the center axis;
• a bottom portion widening from an inner surface of the main body portion to the radially inner side;
• and
• a plurality of protrusion portions extending from the bottom portion toward the second side;
• the cover covers the second side of the opening;
• the wiring member includes:
• an external power-supply connection terminal provided in the connector portion to be electrically connected to the external power-supply;
• and
• a plurality of circuit board connection terminals electrically connected to the surface of the second side of the circuit board;
• the plurality of circuit board connection terminals is arranged along a predetermined direction at the surface of the second side of the circuit board;
• the protrusion portion includes a first protrusion portion;
• and
• an outer edge of the circuit board is provided with a first notch portion in which the first protrusion portion is located;
• the end of the second side of the first protrusion portion is provided with a claw portion;
• the first protrusion portion is fixed to the circuit board by a snap-fit connection;
• at least one of the plurality of circuit board connection terminals includes:
• a first connection portion extending in a radial direction;
• a first extension portion extending from an end of a radially inner side of the first connection portion toward the second side;
• a second connection portion extending from an end of a side of the first extension portion adjacent to the second side toward a radially inner side of the second connection portion;
• a second extension portion extending from an end of the radially inner side of the second connection portion toward the first side, and
• a contact portion extending from an end of a side of the second extension portion adjacent to the first side toward a radially inner side of the contact portion;
• and
• a side of the contact portion adjacent to the first side is electrically connected to the surface of the side of the circuit board adjacent to the second side.