| 摘要 |
<p>1. A selective device for driving at least two driven elements by means of a single motor, of the type comprising at least two drive pulleys (11, 12, 13) connected to rotate with a motor shaft (10) and connected by belts (14, 15, 16) to driven pulleys, respectively associated with each of the driven elements, the belts (14, 15, 16) having in the free state such length and tension that they do not achieve the driving of the driven pulleys (17, 20, 26), and means (37) capable of being selectively brought, relative to the various belts, into a plurality of positions in which they impart to a selected belt sufficient tension for achieving the driving of the associated driven element, characterised in that said means comprise a tension roller (37) carried by a support (38) mounted to be slidable and pivotable on a fixed guide rod (39) parallel to the motor shaft (10).</p> |
