CRAWLER TYPE TRAVELLING DEVICE

摘要

PROBLEM TO BE SOLVED: To provide a crawler type travelling device capable of moving tension wheels to a non-working position without removing the tension wheels by improving arrangement of the tension wheels and grounding rollers. SOLUTION: The tension wheel 5 is structured to be switched to a working position for giving tensile force to a crawler belt 7 and a non-working position for releasing the tensile force. A boss part supported by fitting on a support shaft 15 of the grounding roller 3 is structured of an intermediate small-diameter part 3c and a large-diameter bearing holding part 3d positioning on both sides of the intermediate small-diameter part 3c. A large-diameter grounding roller part 3e is formed outside the large-diameter bearing holding part 3d, and an interval between both the grounding rollers 3e is formed larger than width of the tension wheel 5. COPYRIGHT: (C)2008,JPO&INPIT