Drainage structure for a frame for engine-driven work machinery

A drainage structure for a frame of engine-driven work machinery, the engine-driven work machinery including an engine and a machinery body and being packaged by the frame and an enclosure, the frame supporting components including the engine and the machinery body, the enclosure covering an upper side of the frame, the drainage structure for the frame of the engine-driven work machinery comprising:

• an undercover that covers a bottom surface of the frame from below and is mounted in contact with a lower surface of a frame body with an upper surface of a peripheral end portion thereof serving as an outer periphery of the frame;
• and a frame bottom plate that is arranged above the lower surface of the frame body on the frame body and has an opening portion on a center side,
• wherein the undercover includes at least one drain groove that extends from the center side to an edge on the upper surface thereof,
• wherein a gap is formed between the undercover and the frame bottom plate, and the gap communicates with a space inside the enclosure only via the opening portion and communicates with an exterior of the machinery only via a drain port that is formed between the drain groove and the lower surface of the frame body, and
• wherein the undercover is in proximity to the frame bottom plate with a clearance on the center side and includes an inclined structure in which a distance to the frame bottom plate increases toward an edge side, so as to cause the drain groove to be inclined downward toward the drain port.