| 摘要 |
PROBLEM TO BE SOLVED: To improve a turn control mechanism incorporated in a transmission case for running. SOLUTION: This transmission case 4 for running is constituted in such a way that it has a swash plate 1a capable of changing pressure oil discharge amount and lets a pair of variable hydraulic devices 1 act by connecting and arranging them by an exclusive hydraulic circuit part 2 in accordance with the same specifications allowing common use as a pump and a motor and both variable hydraulic devices 1 are arranged at adequate positions of a gear interlocking mechanism having a steering clutch 3 for gear shifting and transmission. When a vehicle body 5 turns, release action of the steering clutch 3 and closing of the hydraulic circuit part 2 are substantially simultaneously performed to start the operation of the swash plate 1a of the variable hydraulic device 1 for turning action. When returning the vehicle body into a straight advance condition, the swash plates 1a of the left and right variable hydraulic devices 1 are returned to an original condition, and then the hydraulic circuit part 2 is opened simultaneously with letting-in action of the steering clutch 3 for straight advance running. COPYRIGHT: (C)2004,JPO
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