Patent ID: 6390572
Filing Date: 2002-05-21
Classification: B62D

Abstract:
A crawler belt including right and left track links each consisting of a large number of track links successively connected in an endless form, each one of said track links being provided with an outer link portion at one longitudinal end and an inner link portion at an opposite longitudinal end thereof; bushes each located transversely between said inner link portions of said right and left track links and having opposite ends thereof disposed in face to face relation with outer link portions; connecting pins inserted in said bushes and having opposite ends thereof fitted in and connected to said outer link portions; and a sealing device located around a connecting pin in a gap space between an outer link portion of said track links and an opposing one of said bushes, characterized in that:said outer link portion is provided with a pin fitting hole to receive an end portion of said connecting pin, and a seal anchor hole formed coaxially with and in a larger diameter than said pin fitting hole and provided with a bottom end surface and inner peripheral surface, and adapted to hold said sealing device; and said sealing device is constituted by a seal ring formed of a resilient material and in a ring-like shape having a diameter larger than that of said connecting pin and set in position between an inner peripheral surface of said seal anchor hole and said opposing end face of said bush, and a coned disc spring interposed in a compressively deformable state between and abutting against said bottom end surface of said seal anchor hole and said end face of said bush at outer and inner peripheral ends of maximum and minimum diameters, respectively, and adapted to press said seal ring resiliently against said inner peripheral surface of said seal anchor hole and said end face of said bush.