Bicycle motor unit and bicycle derailleur

A bicycle motor unit comprising:

• an electric motor configured to generate a driving force;
• and
• a transmitting structure coupled to the electric motor to transmit the driving force from the electric motor to an actuated device of a bicycle, the transmitting structure including:
• a first rotatable member rotatable about a rotational axis;
• a second rotatable member rotatable relative to the first rotatable member about the rotational axis;
• and
• a resisting structure at least partially provided between the first rotatable member and the second rotatable member so as to resist relative rotation between the first rotatable member and the second rotatable member, wherein
• the first rotatable member includes a first coupling portion coupled to the resisting structure,
• the second rotatable member includes a second coupling portion coupled to the resisting structure, and
• the second coupling portion is at least partially provided radially inwardly of the first coupling portion.

A bicycle motor unit comprising:

• an electric motor configured to generate a driving force;
• and
• a transmitting structure coupled to the electric motor to transmit the driving force from the electric motor to an actuated device of a bicycle, the transmitting structure including:
• a first rotatable member rotatable about a rotational axis;
• a second rotatable member rotatable relative to the first rotatable member about the rotational axis;
• and
• a resisting structure at least partially provided between the first rotatable member and the second rotatable member so as to resist relative rotation between the first rotatable member and the second rotatable member, wherein
• the first rotatable member includes a first coupling portion coupled to the resisting structure,
• the second rotatable member includes a second coupling portion coupled to the resisting structure,
• the first coupling portion includes a first contact surface contactable with the resisting structure,
• the second coupling portion includes a second contact surface contactable with the resisting structure, and
• the first contact surface is radially spaced apart from the second contact surface with respect to the rotational axis.

A bicycle motor unit comprising:

• an electric motor configured to generate a driving force;
• and
• a transmitting structure coupled to the electric motor to transmit the driving force from the electric motor to an actuated device of a bicycle, the transmitting structure including:
• a first rotatable member rotatable about a rotational axis;
• a second rotatable member rotatable relative to the first rotatable member about the rotational axis;
• and
• a resisting structure at least partially provided between the first rotatable member and the second rotatable member so as to resist relative rotation between the first rotatable member and the second rotatable member, wherein
• the second rotatable member includes a second gear,
• the first rotatable member includes a hole extending along the rotational axis, and
• the second gear is at least partially provided in the hole.