Input shaft support structure

摘要

An input shaft support structure is a structure for supporting an input shaft (510) that transmits rotation of a crank shaft (502) in a clutch (500) connected state to one or more gears (506, 508) in a gear box (504). One end portion (512) of the input shaft (510) is rotatably supported against a case (518) of the gear box (504) with interposition of a first bearing (514) and a second bearing (516) that are disposed with a gap therebetween, the other end portion (520) of the input shaft (510) is rotatably supported against an inner circumferential face of an end portion of the crank shaft (502) with interposition of a third bearing (522), and the third bearing (522) is fitted to the input shaft (510) more loosely than the first bearing (514) and the second bearing (516).