| 摘要 |
Provided is a power-assisted bicycle capable of preventing the attaching of oil to a control board and the like even when the control board and the like are disposed in a single-shaft type motor drive unit. In an auxiliary driving force transmitting route extending between a motor (21) and a force combining member (29), a deceleration mechanism (25) including a plurality of intermeshing gear portions is disposed. The motor (21), a center portion of a crank shaft (7a), the force combining member (29), and the deceleration mechanism (25) are disposed in a motor drive unit (20). In a unit casing (22) of the motor drive unit (20), a control board (24b) is disposed. In the motor drive unit (20), an oil blocking cover (50) is disposed to prevent invasion of oil attached to the gear portions of the deceleration mechanism (25) into a control board (24b) disposed region, the oil blocking cover partitioning a deceleration mechanism (25) disposed region and a control board (24b) disposed region. |
