Patent ID: 7992660

Claim:
A crawler vehicle, comprising: a track frame; left and right crawler frames provided on the both left and right sides of said track frame; left and right crawlers installed in outer peripheries of said crawler frames relatively; and a positioning device for positioning and fixing each of said left and right crawler frames to said track frame, the respective positioning device for each of said left and right crawler frames positioning and fixing at least at three positions including an expansion position for maximizing a distance between centers of said crawlers, a contraction position for minimizing the distance, and an intermediate position in the middle of both the above positions, wherein each of said positioning devices comprises: a connection link having one end connected to one of said crawler frames and provided with an intermediate protruding portion and with at least three fixing member holes; a fixing bracket attached to said track frame and provided with a fixing member hole into which a fixing member is insertable, and at least one positioning member hole; and a positioning member removably positioned in the at least one positioning member hole, wherein the intermediate protruding portion of the connecting link and the at least one positioning member hole of the fixing bracket are arranged such that the intermediate protruding portion is brought into contact with the positioning member inserted into the at least one positioning member hole for performing positioning of the one of the crawler frames at the intermediate position when said connection link is moved during movement of said one of the crawler frames from the expansion position or the contraction position to the intermediate position.