Patent ID: 8607461

Claim:
A bush cutter in which driving power of a drive source is transmitted from a drive shaft to an output shaft, via driving and driven bevel gears, to rotate a cutter blade provided on one end section of the output shaft, the bush cutter comprising: a gearbox supporting therein the output shaft via first and second bearings, the driven bevel gear being accommodated in the gearbox in such a manner that the driven bevel gear is not movable relative to the gearbox in an axial direction of the output shaft; the second bearing engaged by an engaging member, fastened to the gearbox, in such a manner that the second bearing is not axially movable toward the cutter blade relative to the gearbox, the second bearing supporting a portion of the output shaft located near the cutter blade; the output shaft connected to the driven bevel gear within the gearbox in such a manner that the output shaft is not rotatable relative to the driven bevel gear but axially movable relative to the driven bevel gear, and that, when an engaged state of the second bearing is canceled by the engaging member, a gear attachment portion of the output shaft is axially movable with the second bearing toward the cutter blade; and a retaining stopper provided within the gearbox, wherein, when the engaged state of the second bearing is canceled by the engaging member, the gear attachment portion of the output shaft is allowed to axially move toward the cutter blade until the output shaft becomes rotatable relative to the driven bevel gear, the retaining stopper preventing the gear attachment portion of the output shaft from further axially moving toward the cutter blade after the output shaft becomes rotatable relative to the driven bevel gear.