| 摘要 |
An infinitely variable speed transmission comprising a variable diameter drive pulley (36) on a primary shaft (20), a variable diameter driven pulley (37) on a secondary shaft (35), wherein the driven pulley comprises a movable cone (37b) mounted on the secondary shaft for joint rotation therewith and for axial displacement relative to the secondary shaft towards and away from a fixed cone (37a), wherein a substantially tubular shell (80), rigidly attached to the movable cone (37b), has a constricted end (80b) loosely fitted over the secondary shaft, and wherein the interior of the shell is divided by a partition (39a) into an actuation chamber (39b) and a counterbalance chamber (80a). For lubricating some moving parts of the transmission when the secondary shaft (35) is in rotation at such low speed that the counterbalance chamber (80a) requires no fluid for counterbalancing the centrifugal force of the fluid in the actuation chamber, a fluid outlet (81a) of a fluid passageway (83, 84) in the secondary shaft is so positioned that the constricted end (80b) of the shell (80) directs the fluid issuing from the fluid outlet to the exterior of the shell, rather than into the counterbalance chamber, at a prescribed high speed ratio of the primary shaft to the secondary shaft. |
