Stator-fixed structure and driving unit

摘要

A driving unit includes a stator, a housing including a tubular section to accommodate the stator, a cover coupled to the housing to block an upper opening of the tubular section, and a bent wire rod defined by a wire to press the stator against the tubular section, the bent wire rod being arranged between a top surface of the stator and a rear surface of the cover while being compressingly deformed along an axis of the stator. The bent wire rod has an annular or substantially annular shape with an opened portion when seen along the axis, and includes projections projecting upward along the axis and depressions projecting downward along the axis being arranged alternately and successively. An elastic force from the bent wire rod causes the stator to receive a downward force along the axis. The stator is pressed against the tubular section to hold the stator in the housing.

主权项

1. A stator-fixed structure comprising:
a stator; a housing including a tubular section to accommodate the stator; a cover coupled to the housing to block an upper opening of the tubular section; and a bent wire rod defined by a wire to press the stator against the tubular section, the bent wire rod being arranged between a top surface of the stator and a rear surface of the cover while being compressingly deformed along an axis of the stator; wherein the bent wire rod has a substantially annular shape with an opened portion when seen along the axis, and includes projections projecting upward along the axis and depressions projecting downward along the axis arranged alternately and successively, the projections contacting the rear surface of the cover and the depressions contacting the top surface of the stator; the stator includes a stator core and coils formed by winding the stator core with a winding, and the bent wire rod directly contacts a top surface of the stator core; and the stator includes a restricting element disposed on the top surface of the stator core and located inward relative to an outer peripheral edge of the stator core to restrict shifting of the bent wire rod radially inward.