BEARING MECHANISM FOR DRIVE SHAFT OF UNLOADING DECK IN UNLOADING DECK ELEVATING DEVICE

摘要

PROBLEM TO BE SOLVED: To prevent the seizing, and to support a drive shaft so as to be smoothly turned, and to smoothly operate a load deck elevating device by interposing a bush between bearing for supporting a drive shaft freely to be turned, and forming plural recessed parts in the inner surface of the bush. ;SOLUTION: In an unloading deck elevating device, an elevating cylinder is operated for telescoping so as to turn a drive shaft 2, and a link mechanism is driven so as to elevate a load deck 11. Since a bush 4 is interposed between the drive shaft 2 and the bearings 3, even in the case of a lack of the lubricating oil, the bush 4 functions as a cushion so as to prevent the seizing between the drive shaft 2 and the bearings 3. Since the inner surface of the bush 4 is provided with plural recessed parts 4a, friction between the drive shaft 2 and the bearings 3 is restricted small, and these recessed parts 4 function as a lubricating oil reservoir, and the drive shaft 2 is supported so that it can be smoothly turned.;COPYRIGHT: (C)1997,JPO