| 摘要 |
The invention relates to a control mechanism for a gearbox with several ratios, with coaxial shafts, comprising a control member with oscillating mounting, engaged via drive plates with a cylindrical slide fitted, at its periphery, with grooves in which there are engaged the guide tenons of the moving forks located in a single plane, which provide displacement of the clutch. The external surface 36 of the guide tenons has the shape of a cone and the guide tenons are in straight contact with lateral walls 30 of the grooves 28, the angular projection of the cams 43 which result from the grooves 28 passing across the surface of the slide 10 in a plane perpendicular to the axis of the slide forms at least one circular arc whose length corresponds to an angle at the centre alpha 2 which is less than 140 DEG . <IMAGE> |
