| 摘要 |
PROBLEM TO BE SOLVED: To avoid power loss when traveling straight, and to smoothly perform transference from straight traveling to turning without complicating transmission structure, and to prevent deterioration of machine body stability and the generation of over-load of an engine when traveling on a road, in regard to a crawler traveling vehicle provided with a straight traveling HST and a turning HST. SOLUTION: This crawler traveling vehicle provided with a pair of crawler traveling devices 7 in right and left is provided with the straight traveling HST 16 for shifting straight traveling power and the turning HST 17 for shifting turning power. When traveling straight, output rotation of the straight traveling HST 16 is transmitted to the right and the left crawler traveling devices 7, and when turning, output rotation of the straight traveling HST 16 and the turning HST 17 are synthesized by a planetary reduction gear mechanism 42, and transmitted to the crawler traveling device 7 inside a turn. When a traveling auxiliary reduction gear mechanism 24 is shifted to an on-road traveling position (speed H), transmission ratio of a transmission 14 is set to prevent transference to a spin turn. COPYRIGHT: (C)2006,JPO&NCIPI
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