| 摘要 |
<p>In a transmission device, a coupling device (38) is mounted operationally between said support (111) and a housing (4) of the transmission device, and comprises a common toothed member (37) engaging with at least one planet gear (39) mounted in rotation in a housing (50) to form with each planet gear and the housing an individual hydraulic pump comprising an hydraulic fluid inlet area (129) and an hydraulic fluid delivery area (131) on either side of an engagement area (130) between said common toothed member (37) and each planet gear (39), and distribution means (40) selectively to enable and prevent the flow of hydraulic fluid from delivery area (131) of each pump, characterised in that the distribution means comprise a cutaway movable organ (40) adjacent to one of the faces of each planet gear (39), and in that said movable organ (40) can be moved between a release position in which a recess of said movable organ (40) simultaneously opens into said inlet (129) and delivery (131) areas thereby to establish a direct communication between said inlet (129) and delivery (131) areas, and a coupling position in which it blocks off at least one of the two inlet (129) and delivery (131) areas of each planet gear (39).</p> |
