Motor and mounting method

1. A motor comprising:

a stator with a ring shape around a central axis extending up and down; and

a rotor located radially inside the stator and being rotatable about the central axis; wherein

the stator includes:

a stator core including a core back with a ring shape about the central axis, and teeth extending radially inward from the core back; and

a coil including a conducting wire wound around the teeth;

the rotor includes:

a shaft extending along the central axis; and

a rotor main body rotatable about the central axis in conjunction with the shaft;

the motor further includes:

a busbar assembly located axially above the stator core; wherein

the busbar assembly includes:

a conductor to which a lead wire extending axially upward from the coil is connected; and

a bus bar holder holding the conductor;

the conductor includes a connection terminal extending axially upward of the bus bar holder;

the connection terminal includes:

a lower terminal portion;

a bent portion extending radially inward from an upper end of the lower terminal portion; and

an upper terminal portion extending axially upward from a radially inner end of the bent portion;

the upper terminal portion is located radially inside radially inner end surfaces of the teeth; and

a total axial length from an upper end of the stator to an upper end of the lower terminal portion is longer than a total axial length of the rotor main body.

2. The motor according to claim 1 , wherein the upper terminal portion is located radially inside an outer peripheral surface of the rotor main body.

3. The motor according to claim 1 , wherein

the conductor includes a plurality of the connection terminals; and

the connection terminals are located within an area extending 180° about the central axis.

4. The motor according to claim 1 , further comprising:

a housing made of a resin to accommodate the stator core, the coil, and the rotor main body; wherein

the connection terminal extends upward of the housing through a lead bushing made of a resin and provided in the housing.

5. The motor according to claim 4 , wherein the bent portion is located below an upper end of the lead bushing.

6. The motor according to claim 4 , further comprising:

a bearing axially above the rotor main body;

the bearing supporting the shaft in a rotatable manner relative to the housing; wherein

the housing includes a bearing holding portion holding the bearing; and

the bearing holding portion is radially opposite to the lower terminal portion.

7. A mounting method of mounting a rotor including a shaft and a rotor main body to a stator core and a busbar assembly located axially above the stator core, in a process of manufacturing a motor, the mounting method comprising:

a) moving the rotor in a direction intersecting with an axial direction such that a central axis of the stator core is aligned with a central axis of the rotor at a position axially above the stator core; and

b) moving the rotor axially downward to insert the rotor main body into a radially inner side of the stator core; wherein

the busbar assembly includes a connection terminal extending therefrom and including:

a lower terminal portion;

a bent portion extending radially inward from an upper end of the lower terminal portion; and

an upper terminal portion extending axially upward from a radially inner end of the bent portion;

the moving the rotor in the direction intersecting with the axial direction includes moving the rotor main body in a direction of the lower terminal portion at an axial position equal to or substantially equal to an axial position of the lower terminal portion; and

a total axial length from an upper end of the stator to an upper end of the lower terminal portion is longer than a total axial length of the rotor main body.