| 摘要 |
The invention is a variable mechanical transmission for converting a rotary input into a rotary output. The transmission includes a spindle for mounting, allowing for rotation in response to the rotary input, a hub mounted on the spindle for rotation therewith, and a plurality of elongate arms. The arms are each pivotally mounted on the hub, with the pivoting axes of the arms being arranged about the spindle axis. Each arm carries at its outer end a clutched pinion which rotates in one direction only. The pinions engage the teeth of a gear. The gear is mountable on a frame for rotation about a gear axis paralleling the spindle axis and also for movement on a frame between concentric and extreme eccentric positions, at which the gear axis has a minimal and maximal displacement, respectively, from the hub axis. Also included in the transmission is shifting structure operable to shift the gear from its concentric toward its extreme eccentric position, and rotary output means coupled to the gear for rotation therewith about the gear axis, for producing a rotary output. The shifting structure may be controlled by an operator or shift responsively to a load on the transmission. |
