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 (1
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).
대표청구항▼
What is claimed is: 1. In a recreational vehicle, a lift mechanism for raising and lowering a platform in an interior of the vehicle, the lift mechanism comprising: a frame; a drive unit; a support member supporting the platform and connected to the frame to be vertically movable relative to the fr
What is claimed is: 1. In a recreational vehicle, a lift mechanism for raising and lowering a platform in an interior of the vehicle, the lift mechanism comprising: a frame; a drive unit; a support member supporting the platform and connected to the frame to be vertically movable relative to the frame; an elongated flexible member having a first end linked to the drive unit and a second end fixed relative to the frame; and at least one guide member engaging the flexible member between the first and second ends and directing the flexible member through at least one turn; wherein the drive unit drives the first end of the flexible member to adjust the height of the support member; wherein the flexible member includes multiple elongated segments, each segment having a first end coupled together with the first ends of the other segments and to the drive unit and each segment having a second end coupled to the frame, such that travel of the first ends in one direction raises the support member and travel of the first ends in an opposite direction lowers the support member. 2. The lift mechanism of claim 1, wherein the drive unit is mounted to the support member. 3. The lift mechanism of claim 2, wherein the drive unit is an electric motor. 4. The lift mechanism of claim 1, wherein the support member is a lateral frame assembly. 5. The lift mechanism of claim 1, wherein the flexible member is a cable and the at least one guide member is at least one rotatable sheave. 6. The lift mechanism of claim 5, wherein at least a length of the cable passes around the at least one sheave essentially 180 degrees. 7. The lift mechanism of claim 1, wherein there are a plurality of sheaves. 8. The lift mechanism of claim 7, wherein at least one of the sheaves is a double groove sheave. 9. The lift mechanism of claim 7, wherein there are at least eight sheaves. 10. The lift mechanism of claim 1, wherein the flexible member includes a leader segment extending between a rotatable spindle of the drive unit and the first ends of the elongated segments. 11. The lift mechanism of claim 1, wherein the frame includes four channels, one at each corner of the support member. 12. The lift mechanism of claim 1, wherein the first end of the flexible member couples to the drive unit at a rotatable spindle. 13. The lift mechanism of claim 1, wherein the platform is a bunk bed. 14. The lift mechanism of claim 1, wherein the at least one guide member is linked to the support member. 15. A recreational vehicle, comprising a wheeled chassis supporting a vehicle body defining an interior containing a lift mechanism for raising and lowering a platform moved vertically by an elongated flexible member having a first end linked to a drive unit and a second end linked to a frame member fixed relative to the vehicle, and wherein there is at least one guide member engaging the flexible member between the first and second ends and directing the flexible member through at least one turn as the drive unit drives the first end of the flexible member to adjust the height of the platform; wherein the flexible member includes multiple elongated segments, each segment having a first end coupled together with the first ends of the other segments and to the drive unit and each segment having a second end coupled to the frame, such that travel of the first ends in one direction raises the support member and travel of the first ends in an opposite direction lowers the support member.
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이 특허에 인용된 특허 (3)
Thurston, J. Andrew, Ceiling mounted sleeping system.
Novoa Luis A. ; Hellhake Ferdinand F. ; Hurayt Mark S. ; Bocian Byron J. ; Blakewood ; Jr. Charles Huffman ; Good Duncan, Vehicle with bed raising and lowering system.
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