Patent ID: 6520603
Filing Date: 2003-02-18
Classification: B62D

Abstract:
A vehicle comprising a travel dolly and a travel mechanism provided on the left and right sides of said travel dolly,wherein said travel mechanism comprises a front crawler wheel provided at a front part on left and right sides of said travel dolly, said front crawler wheel comprising sprocket teeth; a rear crawler wheel provided at a rear part on left and right sides of said travel dolly; and a pair of left and right crawler belts mounted and driven around said front crawler wheel and said rear crawler wheel; wherein said crawler belt comprises a plurality of inner shoe members made of steel; a plurality of outer shoe members made of steel and arranged to oppose said inner shoe members, respectively; an endless ring-shaped rubber belt member retained between said inner shoe members and outer shoe members respectively opposing each other; and an endless ring-shaped steel wire member embedded in said belt member so as to extend in a longitudinal direction; and wherein said inner shoe members are arranged side by side along an inner periphery of said belt member, while said outer shoe members are arranged side by side along an outer periphery of said belt member; wherein said crawler belt includes a plurality of concave portions that are formed side by side in a longitudinal direction between said inner shoe members so as to open toward the inner periphery to receive the sprocket teeth of the front crawler wheel, so that the crawler belt is passed around the front crawler wheel and rear crawler wheel; wherein said inner shoes are formed of rectangular members elongated toward a width direction of the crawler belt, and a midsection of an inner face being exposed to the inner periphery of the belt member and is provided with a pair of guide protrusions protruding inwards, and wherein the inner shoe members include left and right ends that are embedded in said belt member.