| 摘要 |
An infinitely variable speed hydromechanical steering transmission includes a range-changing mechanism (52) flanked by a pair of hydrostatic units (24,30) which are commonly driven by a mechanical input (10,12) to produce respective mechanical and hydrostatic outputs. These outputs are combined in left and right output planetary gear sets (36,38) which are interconnected by a cross-shaft (48) extending centrally through the range-changing mechanism and hydrostatic units. The range-changing mechanism (52) includes a plurality of clutches (C1 to C3) and brakes (B1,B2) that are selectively engaged in pairs to incrementally change the mechanical output speed on the cross-shaft and thus to operate the transmission in a plurality of forward and reverse speed ranges. Each range change is accompanied by a step change in the hydrostatic outputs. <IMAGE>
|
