Patent ID: 9534354
Date: 2017-01-03
CPC Classifications: B62D,E02F

Claim:
1. A construction machine comprising: a lower track structure whose left and right crawler track devices are adapted to change in spatial interval; an upper swing structure swingably mounted above the lower track structure, the upper swing structure including; the seat base includes a left seat base portion on which the left control lever device is arranged, a right seat base portion on which the right control lever device is arranged, and a middle seat base portion that is placed therebetween and on which the operator's seat is arranged, and an outer peripheral of the left seat base portion is shrouded with an outer cover, the middle seat base portion includes left and right sidewalls for further separating an internal region of the seat base from the left and right seat base portions, and the left seat base portion includes a partition wall that further splits the internal region of the seat base vertically, and the left seat base portion has an upper panel that has a back-and-forth elongated lever hole formed at a rear section of the left control lever device, and the vehicle width changing control lever is configured to extend downward through the back-and-forth elongated lever hole and to be coupled at its lower end to a pivoting section of a linkage mechanism mounted at one end thereof on the partition wall of the left seat base portion via a bracket.