Brushless motor
AssigneeNidec Corporation
InventorsMasashi Nomura, Tomoyuki Tanisugi, Masamichi Nagata
Life of this patent
Estimating the term…
Abstract
A brushless motor includes a motor drive unit, a circuit board arranged to drive the motor drive unit having through holes formed in the upper surface and the lower surface; and a motor attachment plate including a plate-shaped base portion and plate-shaped fixing portions to fix the circuit board in place. Herein, each fixing portion includes a support portion for making contact with a surface of the circuit board; an arm portion bent in a direction that is substantially parallel to the rotational axis; and a protrusion portion inserted into a through hole, having at least one overhang extension protruding from the through hole. The overhang extension of the protrusion is bent in a direction that is substantially perpendicular to the rotational axis.
Claims12
A brushless motor comprising:
- a motor drive unit including a rotor rotatable about a rotational axis;
- a circuit board including a driving circuit arranged to drive the motor drive unit, the circuit board having an upper surface, a lower surface and a plurality of through holes formed in the upper surface and the lower surface;
- and
- a motor attachment plate including a plate-shaped base portion and plate-shaped fixing portions integral with the base portion, the base portion being arranged substantially parallel to the circuit board, the fixing portions being provided in a corresponding relationship with the through holes to fix the circuit board in place;
- wherein
- each of the fixing portions includes:
- a support portion arranged to make contact with a surface of the circuit board that faces the motor attachment plate to support the circuit board;
- an arm portion, extended from the support portion, bent in a direction that is parallel or substantially parallel to the rotational axis;
- and
- a protrusion portion, extended from the arm portion, inserted into the corresponding one of the through holes from the surface of the circuit board that faces the motor attachment plate, the protrusion portion having at least one overhang extension protruding from the corresponding one of the through holes;
- and
- the overhang extension of the protrusion is bent in a direction that is perpendicular or substantially perpendicular to the rotational axis.
Dependencies are inferred from the claim text.