Patent ID: 9481412
Filing Date: 2016-11-01
CPC Classification: B62D

Claim Text:
1. A crawler belt having a track chain in which a plurality of regular links are pivotally connected at one ends thereof, track shoes respectively attached to said plurality of regular links, and a master link for connecting ends of said track chain together to form the crawler belt into a loop, wherein said master link comprises a first master link and a second master link connected to the first master link in series; wherein said crawler belt further comprises: a first coupling pin which is inserted into an insertion hole located at the other end of one of said plurality of regular links, wherein said one regular link is adjacent to one end of said first master link and wherein said first coupling pin is further inserted into an insertion hole located at said one end of said first master link; a second coupling pin which is inserted into an insertion hole located at the other end of said first master link and which is inserted into an insertion hole located at one end of said second master link; a third coupling pin which is inserted into an insertion hole located at the other end of another one of said plurality of regular links, wherein said another one regular link is adjacent to the other end of said second master link and wherein said third coupling pin is further inserted into an insertion hole located at the other end of said second master link; a first slit aperture formed in said first master link so as to lead only to the insertion hole located at the other end of said first master link; a second slit aperture formed in said second master link so as to lead only to the insertion hole located at the one end of said second master link; a first fastening device for allowing a tightening force for narrowing said first slit aperture to work on said first master link; and a second fastening device for allowing a tightening force for narrowing said second slit aperture to work on said second master link, wherein said second coupling in is provided in between the first and second slit apertures in a longitudinal direction of the crawler belt.