A bicycle rear derailleur comprises a base member, a linkage structure, a movable member, a first pulley assembly, and a second pulley assembly. The first pulley assembly includes a first pulley support and a first toothed pulley. The first pulley support is pivotally coupled to the movable member about a first pivot axis. The first toothed pulley is rotatably coupled to the first pulley support about a first pulley axis spaced apart from the first pivot axis. The second pulley assembly includes a second pulley support, a second toothed pulley, and a third toothed pulley. The second pulley support is pivotally coupled to the movable member about a second pivot axis. The second toothed pulley is rotatably coupled to the second pulley support about a second pulley axis. The third toothed pulley is rotatably coupled to the second pulley support about a third pulley axis.

A stabilizer includes a receiving device, a guide plate element for connection with a chain, and a clutch device. The guide plate element is movably mounted on the receiving device and performing a rotation state through an elastic element. The clutch device is mounted on the receiving device and connected with the guide plate element and used for providing one-way resistance. When a vehicle body jounces, the guide plate element rotates upwardly under force, the chain is tensioned, and the clutch device is in a free rotation state. When the guide plate element moves towards an opposite direction under force, the clutch device provides one-way resistance, so that the guide plate element can maintain a tensioning state of the chain for a longer time, and the effect of stabilizing the chain is achieved.

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 assembly for mounting to a bicycle, wherein the bicycle includes a frame, includes an upper body for operationally engaging the rear derailleur assembly to the frame. The rear derailleur assembly also include a chain cage for engaging a chain of the bicycle; a controller pivotally connected to the upper body; and a lower body operationally connected to the chain cage, pivotally connected to the controller, and pivotally connected to the chain cage. The lower body includes a damper assembly for providing rotational resistance as the chain cage rotates in a first direction about the pivot axis.

In an adjustment mode for a derailleur of a bicycle, acceleration values from an accelerometer of the derailleur are sampled as the derailleur moves through sprockets of a rear sprocket assembly. Acceleration signal powers are identified based on the sampled acceleration values, and potential rasping positions are identified based on thresholding of the acceleration signal powers. The identified potential rasping positions are compared to expected rasping positions, and adjustment for the derailleur is set based on a minimum error between the identified potential rasping positions and the expected rasping positions.

In an adjustment mode for a derailleur of a bicycle, acceleration values from an accelerometer of the derailleur are sampled as the derailleur moves through sprockets of a rear sprocket assembly. Acceleration signal powers are identified based on the sampled acceleration values, and potential rasping positions are identified based on thresholding of the acceleration signal powers. The identified potential rasping positions are compared to expected rasping positions, and adjustment for the derailleur is set based on a minimum error between the identified potential rasping positions and the expected rasping positions.

A rear derailleur of a bicycle includes a fixing portion connected to a frame of the bicycle, a linkage assembly, a moving portion, a chain guide assembly, and a driving assembly. The linkage assembly is pivotally connected to the fixing portion. The moving portion is pivotally connected to the linkage assembly. The chain guide assembly is connected to the moving portion. The driving assembly includes a motor and a driving gear assembly connected to the linkage assembly. The motor includes an output shaft for driving the driving gear assembly. The output shaft of the motor drives the linkage assembly to pivot via the driving gear assembly, thereby to drive the moving portion and the chain guide assembly to move. A pivot shaft and a detachable battery module are disposed on the moving portion. The chain guide assembly is pivotally connected to the pivot shaft. The battery module provides an electric power to the motor.

The disclosure provides a bicycle rear derailleur including a linkage assembly, a chain guiding assembly, a first assembling component, a first elastic component and a locking mechanism. The linkage assembly is a four-link mechanism and includes a fixed component, a movable component, a first link and a second link. The chain guiding assembly is pivotably connected to the movable component. The first assembling component is pivotably connected to the movable component and disposed between the first assembling component and the chain guiding assembly. The opposite ends of the first elastic component are respectively fixed to the movable component and the first assembling component so as to provide a torque that allows the first assembling component to be pivotable with respect to the movable component.

The disclosure provides a bicycle rear derailleur including a linkage assembly, a chain guiding assembly, a first assembling component, a first elastic component and a locking mechanism. The linkage assembly is a four-link mechanism and includes a fixed component, a movable component, a first link and a second link. The chain guiding assembly is pivotably connected to the movable component. The first assembling component is pivotably connected to the movable component and disposed between the first assembling component and the chain guiding assembly. The opposite ends of the first elastic component are respectively fixed to the movable component and the first assembling component so as to provide a torque that allows the first assembling component to be pivotable with respect to the movable component.