| 摘要 |
The invention provides a vertical lift mechanism ( 10 ) for a bunk bed within a recreational vehicle. The mechanism includes a lateral support assembly ( 14 ) that travels up and down in an upright frame assembly ( 34 ). The lifting force is provided by a drive unit ( 12 ) mounted to the support assembly ( 14 ) that winds and unwinds a flexible member ( 18 ) through a guide arrangement ( 68, 70, 72, 74, 76, 78, 80, 82 ) mounted to the support assembly ( 14 ). The flexible member ( 18 ) is preferably an assembly of cables, more preferably four primary cables ( 52, 54, 56, 58 ) each having one end attached to the ceiling of the vehicle and their opposite ends coupled together and linked to a leader cable ( 50 ) which is wound about the drive spindle ( 44 ). The primary cables ( 52, 54, 56, 58 ) travel around the guides ( 68, 70, 72, 74, 76, 78, 80, 82 ), which can be an arrangement of single and double sheaves or pulleys, to translate the winding force to vertical forces that raise or lower the support assembly ( 14 ).
|
