Patent ID: 7673589

Claim:
An engine-driven work machine in which a work unit is formed by joining an engine and a work machine driven by a crankshaft of the engine, elastic support members are disposed between a lower part of the work unit and a frame having the work unit mounted thereon, the elastic support members being disposed beneath the crankshaft on either side of a vertical plane passing through the axis of the crankshaft, support faces of opposite elastic support members facing the frame and the work unit are inclined so as to widen from each other in going upward, and restricting means is provided between the work unit and the frame, the restricting means restricting the amplitude of swing of the work unit around the crankshaft to within a predetermined angle, and the restricting means is disposed between upper parts of the work unit and the frame as upper restricting means, wherein the upper restricting means is disposed on either side of the vertical plane passing through the axis of the crankshaft above the crankshaft, and the upper restricting means is arranged so as to also restrict movement of the work unit along the axial direction of the crankshaft to within a predetermined distance, and wherein an exhaust box housing an exhaust muffler of the engine is fixedly provided on one end part of the work unit, and the upper restricting means is provided between opposite side parts of an upper part of the exhaust box and the frame.