| CPC B62M 9/16 (2013.01) [B62M 9/126 (2013.01); B62M 2009/12406 (2013.01)] | 9 Claims |
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1. A rear derailleur, including:
a base, configured to be mounted to a bicycle;
a movable member, rotatably connected to the base;
a shaft, rotatably connected to the movable member;
a chain guide, connected to the shaft;
a biasing member, disposed between the chain guide and the movable member; and
a resistance mechanism, connected to the movable member and configured to apply a frictional resistance to the shaft, including at least one biasing unit, a clutch assembly and a friction applying assembly, the clutch assembly including a first clutch member and a second clutch member which are relatively rotatable, the first clutch member including at least one first abutting portion, the second clutch member including at least one second abutting portion, the at least one first abutting portion and the at least one second abutting portion being abutted against each other in an axial direction of the shaft, one of the first clutch member and the second clutch member being connected to and movable with the shaft;
wherein when the chain guide drives the shaft to rotate in a predetermined direction, an axial extent of the clutch assembly shortens, and the at least one biasing unit applies a first resisting force to the clutch assembly and the friction applying assembly, and when the chain guide drives the shaft to rotate in a direction opposite to the predetermined direction, the axial extent of the clutch assembly elongates, and the at least one biasing unit applies a second resisting force to the clutch assembly and the friction applying assembly, wherein the second resisting force is larger than the first resisting force;
wherein the clutch assembly is clamped between the at least one biasing unit and the friction applying assembly.
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