Patent ID: 7516684
Filing Date: 2009-04-14
Classification: F16H,Y10T

Abstract:
1. A shaft arrangement structure of an engine which is provided with a crank case divided into upper and lower crank case members, forms a transmission room accommodating a transmission of the engine within the crank case, and utilizes a lower portion of the transmission room as an oil reservoir chamber of the engine, wherein an input shaft of the transmission is positioned above a line connecting an axis of a crank shaft of the engine and an axis of an output shaft of the transmission as seen in an axial length direction of the crank shaft, wherein an angle formed between a first segment connecting the axis of the crank shaft and an axis of the input shaft, and a center line of a cylinder of the engine above the axis of the crank shaft is acute, and wherein the output shaft is arranged at a position more away from the crank shaft than the input shaft, and the output shaft is arranged in such a manner that a downward open angle formed between a second segment connecting the axis of the output shaft and the axis of the input shaft and the first segment is obtuse.