Electric power assist device and bicycle
AssigneeHonda Motor Co., Ltd.
InventorKenji TSUKAMOTO
Life of this patent
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Abstract
The center axis of a rotational output member of an electric power assist device and the center axis of a crankshaft can be adjusted to be in parallel to each other without complicating the structure. The electric power assist device comprises a housing 52, an electric motor 58 supported by the housing, and an annular rotational output member 64 configured to be connected to a crankshaft 24 or a crankarm 26 attached to the crankshaft so as to be rotatively driven by the electric motor coaxially with respect to the crankshaft, wherein the housing is supported on the frame structure 18 via a support part 90 provided with an adjustment mechanism 120 to allow a position of the housing along an axial direction of the crankshaft to be varied.
Claims10
An electric power assist device configured to be attached to a frame structure of a bicycle, comprising:
- a housing;
- an electric motor supported by the housing;
- and
- an annular rotational output member configured to be connected to a crankshaft for a pedal of the bicycle or a crankarm attached to the crankshaft so as to be rotatively driven by the electric motor coaxially with respect to the crankshaft,
- wherein the housing is supported on the frame structure via a support part provided with an adjustment mechanism to allow a position of the housing along an axial direction of the crankshaft to be varied.
Dependencies are inferred from the claim text.