| 摘要 |
A friction drive unit for use within a transaxle driving assembly in self-propelled vehicles such as grass-mowing lawn tractors, the transaxle comprising a two-piece housing structure forming a number of internal chambers for the encapsulation of the friction drive unit, associated reduction gearing and a mechanical differential. The friction drive may comprise as input members, a pair of driver wheels operatable against a larger driven disc wheel acting as the output member, such that only one driver wheel can be engaged to the driven wheel at any one time, and where the direction of vehicle motion depends on which one of the two driver wheels is in contact with the driven wheel. Each of the driver wheels is subjected to continuous rotation from an input drive shaft and are operatively displaced along the shaft by means of respective sliding yoke means. The output from the driven wheel is connected to the transaxle output shafts by means of high ratio gear reduction means.
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