The disclosure relates to an electromechanical rear derailleur for coaxial assembling on a rear wheel axle. The derailleur has a base element, a pivot mechanism, and a movable element having a chain guide assembly. The chain guide assembly is connected to the movable element so as to be rotatable about a rotation axis. A blocking device permits the chain guide assembly to be established relative to the movable element. The blocking device is able to be inserted into the movable element in two different positions.

A rear derailleur with rotation resistance application function includes a base member, a link assembly, a movable member, and a chain guide, wherein the base member is mounted on a frame; the link assembly is flexibly connected between the base member and the movable member; and the chain guide is connected to the movable member via a rotation-with-resistance structure. The rotation-with-resistance structure includes a rotary shaft, a one-way bearing and a resistance application spring, wherein the rotary shaft is disposed on the movable member or the chain guide; the one-way bearing matched with the rotary shaft is correspondingly disposed on the chain guide or the movable member; and the rotary shaft forms an interference fit with an inner hole of the one-way bearing. The rear derailleur can effectively prevent a chain from coming off during bumping.

A rear derailleur with rotation resistance application function includes a base member, a link assembly, a movable member, and a chain guide, wherein the base member is mounted on a frame; the link assembly is flexibly connected between the base member and the movable member; and the chain guide is connected to the movable member via a rotation-with-resistance structure. The rotation-with-resistance structure includes a rotary shaft, a one-way bearing and a resistance application spring, wherein the rotary shaft is disposed on the movable member or the chain guide; the one-way bearing matched with the rotary shaft is correspondingly disposed on the chain guide or the movable member; and the rotary shaft forms an interference fit with an inner hole of the one-way bearing. The rear derailleur can effectively prevent a chain from coming off during bumping.

The disclosure provides a chain guide assembly including a movable member, a chain guide and a resistance applying assembly. The chain guide is pivotably disposed on the movable member. The resistance applying assembly includes a shaft seat, a first engagement component, a control component and a second engagement component. The shaft seat includes a seat portion and a flange portion. The seat portion is fixed on the chain guide. The flange portion is located at a side of the seat portion away from the chain guide and protrudes from the seat portion. The seat portion is disposed through the first engagement component. The first engagement component is clamped by the flange portion and the chain guide. The control component is disposed on the movable member. The second engagement component is pivotably disposed on the movable member and movable with the control component.

The disclosure provides a chain guide assembly including a movable member, a chain guide and a resistance applying assembly. The chain guide is pivotably disposed on the movable member. The resistance applying assembly includes a shaft seat, a first engagement component, a control component and a second engagement component. The shaft seat includes a seat portion and a flange portion. The seat portion is fixed on the chain guide. The flange portion is located at a side of the seat portion away from the chain guide and protrudes from the seat portion. The seat portion is disposed through the first engagement component. The first engagement component is clamped by the flange portion and the chain guide. The control component is disposed on the movable member. The second engagement component is pivotably disposed on the movable member and movable with the control component.

A rear derailleur is provided, including: a base, configured to be mounted to a bicycle; a linkage assembly, connected to the base; a movable member, rotatably connected to the linkage assembly; a chain guide, rotatably connected to the movable member by an axle assembly; a biasing member, located between the movable member and the chain guide, positioned to the movable member and the chain guide; a resistance mechanism, connected to the movable member; and a cap member, covering the resistance mechanism and driving the resistance mechanism, rotatably positionable in either of a first position and a second position, wherein when the cap member is positioned in the first position, the resistance mechanism provides a first resistance, and when the cap member is positioned in the second position, the resistance mechanism provides a second resistance which is different from the first resistance.

A rear derailleur is provided, including: a base, configured to be mounted to a bicycle; a linkage assembly, connected to the base; a movable member, rotatably connected to the linkage assembly; a chain guide, rotatably connected to the movable member by an axle assembly; a biasing member, located between the movable member and the chain guide, positioned to the movable member and the chain guide; a resistance mechanism, connected to the movable member; and a cap member, covering the resistance mechanism and driving the resistance mechanism, rotatably positionable in either of a first position and a second position, wherein when the cap member is positioned in the first position, the resistance mechanism provides a first resistance, and when the cap member is positioned in the second position, the resistance mechanism provides a second resistance which is different from the first resistance.

A damping device includes an annular chamber rotatably coupled with the gear selection assembly; a rotating element rotatably coupled with the chamber and fixedly coupled with a gear guide pulley of the gear selection device; and a damping grease volume, the damping grease volume contained under pressure between the chamber and the rotating element and adapted to transfer force between the chamber and to the rotating element. The damping device may be adapted for integration within a gear selection device and for coupling with a linear actuator of the gear selection device. The damping device may be coupled with both a chain pulley of the gear selection device and the linear actuator, wherein the damping device positions the chain pulley within the gear selection device as driven by the linear actuator. The gear selection device may be attached to or comprised within a wheeled vehicle, such as a bicycle.

A damping device includes an annular chamber rotatably coupled with the gear selection assembly; a rotating element rotatably coupled with the chamber and fixedly coupled with a gear guide pulley of the gear selection device; and a damping grease volume, the damping grease volume contained under pressure between the chamber and the rotating element and adapted to transfer force between the chamber and to the rotating element. The damping device may be adapted for integration within a gear selection device and for coupling with a linear actuator of the gear selection device. The damping device may be coupled with both a chain pulley of the gear selection device and the linear actuator, wherein the damping device positions the chain pulley within the gear selection device as driven by the linear actuator. The gear selection device may be attached to or comprised within a wheeled vehicle, such as a bicycle.

A derailleur comprises a base member configured to be attached to a human-powered vehicle frame, a movable member movable with respect to the base member, a pulley assembly pivotally attached to the movable member in a first pivotal direction and a second pivotal direction opposite to the first pivotal direction and including a first pulley having a first pulley axis and a second pulley having a second pulley axis, a pulley assembly biasing member configured to bias the pulley assembly with respect to the movable member in the first pivotal direction, a pulley distance (centimeter) being defined between the first pulley axis and the second pulley axis, a biasing return force (newton) being defined by rotational force of the pulley assembly relative to the movable member, and a return value defined by the biasing return force multiplied by the pulley distance. The return value is 136 or larger.