OUTER-ROTOR MOTOR

摘要

An outer-rotor motor includes a stationary portion, a rotating portion, and a bearing mechanism arranged to support the rotating portion such that the rotating portion is rotatable about a central axis extending in a vertical direction with respect to the stationary portion. The stationary portion includes a stator, a mounting plate, and a circuit board. The rotating portion includes a shaft, a rotor holder, and a rotor magnet. The mounting plate includes a projecting portion arranged to project radially. The outer-rotor-motor further includes a guide structure connected with the projecting portion. The guide structure is arranged to extend axially, radially outside the rotor holder. A leadwire is electrically connected to the circuit board, and is guided along the guide structure. Provision of the guide structure, which is arranged to guide the leadwire radially outwardly of the rotor holder, contributes to preventing a contact between the leadwire and the rotor holder.

主权项

1. An outer-rotor motor comprising:
a stationary portion; a rotating portion; a bearing mechanism arranged to support the rotating portion such that the rotating portion is rotatable about a central axis extending in a vertical direction with respect to the stationary portion; a guide structure; and a lead wire; wherein the stationary portion includes:
a stator including a stator core arranged on an outer circumference of the bearing mechanism;a mounting plate arranged below the stator to support the bearing mechanism; anda circuit board arranged between the mounting plate and the stator; the rotating portion includes:
a columnar shaft arranged to extend along the central axis and project in an axial direction from the circuit board;a rotor holder including a cylindrical portion centered on the central axis, and arranged to cover the stator; anda rotor magnet arranged on an inner circumferential surface of the cylindrical portion of the rotor holder, and including an inner circumferential surface arranged radially opposite the stator core; the mounting plate includes a projecting portion arranged to project radially; the guide structure is connected with the projecting portion; the guide structure is arranged to extend axially upward, radially outside the rotor holder; and the lead wire is electrically connected to the circuit board, and is guided along the guide structure.