PIN CONNECTION STRUCTURE OF WORK MACHINE

PROBLEM TO BE SOLVED: To provide a pin connection structure of a work machine by which the pin connection structure facilitates positioning between a bolt insertion hole formed in the connection pin and a bolt insertion hole formed in the one component member, in the case the connection pin is fixed to one of the component members by a fixing bolt in a turning prevented manner, when connecting component members together via a connection pin. SOLUTION: According to the pin connection structure, a flange portion 11a protruding on a radially external side of the connection pin 11 is integrally formed on one axial directional edge of the connection pin 11, and flat end faces 11b for abutting a tool thereon is formed on an external peripheral edge of the flange portion 11a, in order to facilitate rotation of the connection pin 11, when positioning between the bolt insertion hole of the connection pin 11 and the bolt insertion hole of the lower-side frame 16 is carried out. COPYRIGHT: (C)2009,JPO&INPIT