#$%^&*AU2010236035B220130926.pdf#####STRUCTURE FOR PREVENTING FALLING-DOWN OF CUTTER BLADE SHAFT OF BUSH CUTTER Abstract 5 In a structure for preventing falling-down of a cutter blade shaft (6) of a bush cutter, where the cutter blade shaft (6) is rotatably mounted in a vertical orientation in a cutter head case (1) via a pair of upper and lower bearings (4, 5) and where driving force is transmitted from a transmission shaft (15) to the cutter blade shaft (6) via driving and driven bevel gears (16, 7), a recessed portion (18) of a reduced diameter is provided on to the cutter blade shaft (6) between the driven bevel gear (7) and the lower bearing (5), and a falling-down preventing pin (19) is inserted at its opposite end portions in the head case in such a manner as to extend across the recessed portion (18).1/2 FIG.1 14 1915 23 7 24 19 2 22 37 9 12 10 6 13 Ilea FIG.2 20 19 24 23 - , 6 2 19b 21
