| 摘要 |
A wheel cradling assembly includes a self-locking and self-unlocking actuator assembly associated with each of four dolly wheels, each actuator assembly having a roll-over pivot gear for moving an associated dolly wheel spindle between released and actuated positions. A gear lock either allows or prohibits rotational motion of the roll-over pivot gear in accordance with the gear lock's pivotable position, and a spindle retainer automatically engages and releasably locks the dolly wheel spindle whenever the spindle is moved to the actuated position by the gear. m e dolly assembly also includes a pair of cross arm assemblies extending transversely between a pair of dolly wheel carrying base assemblies for surrounding a pair of coaxial wheels of a towed vehicle. |
