| 摘要 |
<p>Transmission comprising a main shaft (1) integral with at least one first sleeve (2), as well as one or more helical springs (3, 4) which are arranged inside a first collar (5) and/or a second collar (6), respectively, and are keyed to these collars (5, 6), so that a relative rotation of at least one collar (5, 6) with respect to the main shaft (1) causes the tightening of at least one helical spring (3, 4) around the first sleeve (2) and one of at least two second sleeves (16, 17) arranged in a coaxial and rotatable manner around the main shaft (1), wherein at least one control member (10) is mechanically connected to the collars (5, 6) for shifting them axially and coupling them frictionally with first wheels (18, 19) which are coaxially integral with the second sleeves (16, 17).</p> |
