Patent ID: 8083019

Claim:
An upper assembly structure of a work machine comprising: a driver's seat mounted on a vehicle body; an engine compartment for housing an engine; a tank compartment for housing a tank; a hood; a tank cover member; a first partition for partitioning between the engine compartment and the driver's seat; a second partition for partitioning between the tank compartment and the driver's seat; and a support frame mounted on the engine compartment including an arm member protruding from the support frame toward the tank compartment; wherein the engine compartment and the tank compartment are arranged to form an L-shape as viewed from the top, wherein the engine compartment is covered by the first partition and the hood, wherein the tank compartment is covered by the second partition and the tank cover member, and wherein the arm member supports internal equipment arranged inside the tank compartment and a hinge having a fore-and-aft axis is provided on a top surface of the arm member, the tank cover being attached to the hinge.