| 摘要 |
An operating mechanism (26) for a multi-speed bicycle wheel hub (12) has the following elements: a housing (46) which can be attached to one end (16a) of the hub, a first cam plate (K1), a second cam plate (K2) and a pinion (54d) which are connected to one another fixed in terms of rotation and which form a pivoting element (54) which can be mounted in the housing (46) so as to be pivotable about a pivot axis (54c), an elongated toothed-rack element (58) with a longitudinal axle (58b) which is mounted in the housing so as to be movable parallel to the longitudinal axle (58b), can be connected to a gear-selection device (30) by means of a force-transmission element (28) and has a longitudinal toothing (58a) which extends parallel to the longitudinal axle (58b) and engages in a toothing of the pinion (54d), a first and a second pivot lever (H1, H2) which are pivotably mounted in the housing (46), the first pivot lever (H1) resting continuously on the first cam plate (K1) and the second pivot lever (H2) resting continuously on the second cam plate (K2) so that in each case they carry out a pivoting movement which is defined by the shape of the respective cam plate (K1, K2), the first pivot lever (H1) engaging on one of the two gear-shifting elements (40, 42) and the second pivot lever (H2) engaging on the other gear-shifting element (40, 42) in order to correspondingly move the respective gear-shifting element (40, 42) parallel to the axis of rotation (17). <IMAGE> |
