| 摘要 |
<p>The truck mounted lifting mechanism (10) is carried on a truck frame having a pair of opposed C-shaped tracks (28, 30) extending rearward from the cab (13). A mast (40) having a base (42) carrying an axle (44) engages the outside of the tracks (28, 30) with a pair of flange rollers (46, 47). A carriage (50) is mounted at one end on the base axle (44) of the mast (4). The other end of the carriage is provided with an axle (52, 53) and a pair of flanged rollers (54, 55) which engage the inside of the tracks. The carriage (50) is provided with a threaded central opening (72) and a screw gear (70) extends through the threaded opening (72) and along substantially the entire length of the truck frame. The screw gear (70) is coupled by a chain drive (71) to a hydraulic motor (69), operation of the drive motor rotates the screw gear (70) causing a lateral displacement of the carriage (50) and the mast (40).</p> |
