Motor unit and electric bicycle
AssigneePanasonic Intellectual Property Management Co., Ltd.
InventorMasafumi Kawakami
Life of this patent
Estimating the term…
Abstract
A motor unit includes: a case; a motor housed in the case; an input shaft; an output body; and a speed reducer mechanism. The input shaft penetrates through the case in an axial direction and is arranged to be rotatable around an axis defining the axial direction. The output body is arranged in the case to be rotatable around the axis. The speed reducer mechanism is housed in the case and reduces a rotational speed of the motor and transmits rotational force with the rotational speed thus reduced to the output body. The speed reducer mechanism includes only one pair of gears meshing with each other.
Claims19
A motor unit comprising:
- a case;
- a motor housed in the case;
- an input shaft penetrating through the case in an axial direction and arranged to be rotatable around an axis defining the axial direction;
- an output body arranged in the case to be rotatable around the axis;
- and
- a speed reducer mechanism housed in the case and configured to reduce a rotational speed of the motor and transmit rotational force with the rotational speed thus reduced to the output body, and
- a sprocket attached to the output body,
- the speed reducer mechanism including only one pair of gears meshing with each other, and
- when viewed in the axial direction, an entire outline of the case falls within an outline of the sprocket.
Dependencies are inferred from the claim text.