SPROCKET SUPPORT STRUCTURE FOR RUNNING SPEED CHANGE GEAR OF CONSTRUCTION MACHINE

摘要

PROBLEM TO BE SOLVED: To provide a tapered roller bearing with superior durability and a high lubricating property by improving a shock-resistant property and wear-resistant property of its retainer and a running speed change gear having such the bearing.;SOLUTION: The running speed change gear 1 comprises a drive shaft 2 connected with a hydraulic motor (not illustrated), planetary gear mechanisms 3, 4, and 5 for reducing rotation of the drive shaft 2, a rotary drum 8 rotatably supported on a housing 7 by the tapered roller bearing 6, and a sprocket 9 fixed on the rotary drum 8. The tapered roller bearing 6 has an inner ring, an outer ring, tapered rollers disposed between the inner ring and outer ring, and the retainer which retains spaces between the tapered rollers and is made of resin.;COPYRIGHT: (C)2006,JPO&NCIPI