To stop a machine body only by the operation of a main clutch by providing a braking means for imparting braking action to a travel transmission system on the transmission lower side of a main clutch interlockingly with main clutch off operation.
A ring-like brake member 43 whirl-stopped being engaged with an engaging part 42 is rotatably fitted with play between a gear G2 meshed with a gear G1, and a ring member 41. The ring member 41 is pressed and displaced onto the gear G2 side through a bearing 44 when a clutch drum 31 is shifted in the clutch off direction. In the off state of a main clutch, the ring member 41 is shifted by shifting the clutch drum 31 onto the gear G2 side, which results in holding a brake member 43 between the gear G2 and the ring member 41, and braking action is imparted to the ring member 41 and the gear G2 which is a driven side rotating member, by friction with the nonrotatable brake member 43 to brake a transmission system on the transmission lower side of the main clutch C.
TANAKA TOMIO
KOTANI SHINSUKE
