| 摘要 |
<p>A gear arrangement for an offset transmission includes two concentric, counter-rotating face gears (28, 30) in meshing engagement with an engine output shaft (12), the face gears being connected to respective concentric, vertical counter rotating face gear shafts (20, 22) of unequal length, each shaft ending in a helical spur gear that is in meshing engagement with an output helical face gear (52). The helical output face gear is connected to the output shaft (14), thereby completing the offset transmission. The face gear shafts can be coupled together by means of thrust bearings (56, 58) that couple the axial thrusts of one shaft to the other in an opposite direction. The shafts can also be coupled via a preload spring (60) that ensures the torque split between the pinion gears is statically determinant. The gear arrangement can be applied to twin engine designs, with a spur gear train (136, 138) coupling the two engines (101, 103) together via an interconnect shaft (132).</p> |
