CRAWLER FRAME, CONSTRUCTION MACHINERY EQUIPPED THEREWITH, AND MANUFACTURING METHOD FOR CRAWLER FRAME

摘要

PROBLEM TO BE SOLVED: To ensure high connection strength between a housing mounting plate and a connection member without degrading work efficiency. SOLUTION: A crawler frame is provided with a motor mounting plate 21 having a motor mounting surface 21b, an idler tumbler mounting plate 20 having an idler tumbler mounting surface 20b and a connection bar 25 extending in the longitudinal direction for connecting the motor mounting plate 21 with the idler tumbler mounting plate 20. At least one of the mounting plates 20, 21 is formed with a receiving hole 20a/21a capable of receiving an end portion of the connection bar 25 from rear surface 20c/21c side. The connection bar 25 is welded to the mounting plate 20/21 through a first fillet weld portion W2 provided between an end surface of the connection bar 25 inserted into the receiving holes 20a/21a and an inner side surface 20d/21d of the receiving hole 20a/21a and a second fillet weld portion W3 provided between a side surface of a mid-way portion of the connection bar 25 and the rear surface 20c/21c. COPYRIGHT: (C)2010,JPO&INPIT