Bicycle derailleur

Abstract

The invention relates to a bicycle derailleur comprising a chain guide configured to interact with a transmission chain of the bicycle and movable between a plurality of intermediate positions comprised between an inner position and an outer position, a fixed body adapted for being fixedly associated with a part of frame of the bicycle, an outer connection element rotatably connected to the fixedbody about a first articulation axis and rotatably connected to the chain guide about a second articulation axis parallel to the first articulation axis, an inner connection element rotatably connected to the fixed body about a third articulation axis and to the chain guide about a fourth articulation axis, an actuation arm hinged to the fixed body about the first articulation axis, a cable-clamping washer constrainable to the actuation arm suitable for locking a control cable on the actuation arm, a first fastening station and a second fastening station defined on said actuation arm and configured to fasten the control cable in different positions on the actuation arm, an anti-rotation appendage projecting from said chain-clamping washer and adapted for being inserted in a holding seat ofthe actuation arm, in at least one from the first and the second fastening station.

Description

technical field [0001] The present invention relates to a bicycle transmission, preferably for racing bicycles. Background technique [0002] As is known, derailleurs, whether front or rear, are used to move a drive chain from one gear of a crankset or cassette to another gear of a different diameter, thereby performing a gear change by changing the gear ratio. [0003] Movement of the derailleur is obtained by means of actuating means mounted on the handlebars so as to be easily manipulated by the cyclist. [0004] In a mechanical shifting mechanism, the front derailleur is moved, for example, between the crown gears of the crankset, shifted up by the pulling action exerted by usually sheathed non-extensible control cables (commonly known as Bowden cables), and Downshifts are made by releasing the pull of the control cable. [0005] The derailleur includes: a chain guide (or derailleur) located above the drive chain; and a positioning mechanism for the chain guide secured...

AI Technical Summary

Problems solved by technology

[0019] However, it is possible that: the first parameter (in other words, the distance between the exit point of the control cables and the transmission) does not correspond to the design specifications; out (very common for frames not made by the same manufacturer as bike components)

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