TRAVELING TRANSMISSION GEAR

摘要

PROBLEM TO BE SOLVED: To resolve complexity of a drive composition and complications of timing control for switching clutches when carrying out linear travel and turning action of a differential gear mechanism by drive of a hydraulic infinite variable- speed drive in a traveling transmission casing. SOLUTION: In the traveling transmission gear, power is interlocked from the differential gear mechanism 7 to a steering clutch 8 via traveling clutches 6 fixed on a clutch sliding shaft 3 loosely engaged to a clutch shaft 2 and respectively executing linear travel and turning from an auxiliary transmission part V in the traveling transmission casing 1 integrated with a gear arrangement to change and transmit power. It is characterized by that an electric control type relief valve 11 and a manual operation type relief valve 12 are serially connected to a pressure oil circuit 10 and a hydraulic cylinder 9 selectively engaging and disengaging a clutch 4 for linear travel and a clutch 5 for turning of the traveling clutches 6, and the differential gear mechanism 7 is arranged between right and left axle shaft gears 14 driving axle shafts 13 of a terminal stage.