Abstract

The present invention relates to a crankset (10) for a cycle, configured to be mechanically coupled by at least a chain to at least one sprocket of a plurality of sprockets, and to be supported by at least a frame of the cycle, characterized in that the crankset comprises: • at least one crankset shaft (15) configured to be guided in rotation by at least a first (13) and a second (14) rolling-element bearing about a main axis of rotation (15a); • at least one carriage (16) that rotates as one with the crankset shaft (15) about the main axis of rotation (15a) and is mounted so as to be free to translate on the crankset shaft (15) along the main axis of rotation (15a); • at least one chainring (17) that moves as one with said carriage (16) in rotation and in translation and is mechanically coupled to a sprocket by means of a chain.

IPC Classes  ?

• B62M 1/36 - Rider propulsion of wheeled vehicles with rotary cranks, e.g. with pedal cranks
• B62M 9/14 - Transmissions characterised by use of an endless chain, belt, or the like of changeable ratio using a single chain, belt, or the like involving different-sized wheels selectively engaged by the chain, belt, or the like the wheels being laterally shiftable

Abstract

Crankset for a cycle comprising a derailleur. The invention relates to a crankset for a cycle intended to be mechanically coupled by at least one chain (13) to at least one sprocket of the cycle and comprising at least one derailleur configured to move the chain (13) alternately from a first chainring (110) to a second chainring (120), the first chainring (110) and the second chainring (120) being borne by the crankset and being rotationally secured to the crankset about an axis of rotation of the crankset, said crankset being characterized in that the derailleur comprises at least: - a movable upshift fork; - an upshift stop; - at least one upshift actuator; - a movable downshift fork; - a downshift stop (170); - at least one downshift actuator.

IPC Classes  ?

• B62M 9/131 - Front derailleurs
• B62M 9/1342 - Mechanisms for shifting laterally characterised by the linkage mechanisms
• B62M 9/1344 - Mechanisms for shifting laterally limiting or positioning the movement
• B62M 9/136 - Chain guidesMounting thereof