| 摘要 |
<p>A multi-speed wheel hub (14) including a housing with an input member (22), including a sun gear, disposed in the housing. A planet carrier (16), including a plurality of planet gears (26), is disposed about the sun gear. A ring gear (30) is diposed about the planet gears. Axially displaceable first and second shift rings (44, 50) are provided. Preferably a piston (38), is used for shifting the first and second shift rings. When the first shift ring is engaged and the second shift ring is disengaged, the ring gear is locked to the housing so that a torque is transmitted from the sun gear through the planet carrier to a wheel. When the first shift ring is disengaged and the second shift ring is engaged, the ring gear is unlocked from the housing and the planet carrier is locked to the input member so that torque is tranmitted from the sun gear to the wheel.</p> |
