| 摘要 |
A portable conveyor having a pair of rear wheels which support the lower end of the conveyor and a pair of caster wheels are spaced forwardly from the rear wheels and are carried by a horizontal axle. An adjustable linkage interconnects the axle and the conveyor and a drive mechanism is operably connected to the linkage and acts to vary the angularity of the linkage and thus change the inclination of the conveyor. The drive mechanism includes a lead screw which is threaded to a nut that is operably connected to the conveyor. The lead screw carries a worm gear which is engaged with a worm that is journalled for rotation in a thrust bar housing attached to the linkage. A driven shaft is connected to the worm and is constructed to be connected to the drive shaft of a reversible, power-operated hand drill. Operation of the high speed drill acting through the worm gear and screw system will rapidly raise and lower the conveyor.
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