TRAVEL DEVICE OF CRAWLER TYPE VEHICLE AND LOWER ROLLING WHEEL

PROBLEM TO BE SOLVED: To provide a travel device of a crawler type vehicle and a lower rolling wheel capable of stably traveling even on an irregular ground with simple structure. SOLUTION: In the travel device of crawler type vehicle, a track frame 1, an idler 2 and a sprocket 3 is arranged on an approximately straight line, a lower rolling wheel 4 is rotatably provided at the lower part of the track frame 1 and a crawler belt is wound around the idler 2, the lower rolling wheel 4 and the sprocket 3. An axial center of the lower rolling wheel is vertically oscillated in the crossing direction with the traveling direction. It is equipped with a first lower roller wheel 4a and a second lower roller wheel 4b. The first lower roller wheel 4a and the second roller wheel 4b are connected through an elastic connecting body 25 along the traveling direction. The elastic connecting body 25 is supported on the truck frame 1 through an elastic support member 27. COPYRIGHT: (C)2003,JPO