Patent ID: 7637343

Claim:
A small-sized vehicle comprising: an engine including an output shaft having a front output shaft portion that transmits a drive force to a front wheel, and a rear output shaft portion that transmits a drive force to a rear wheel; a front gear mechanism including a first shaft on a side of the front wheel which transmits a drive force to the front wheel and to which a drive force from the front output shaft portion of the output shaft is transmitted; a rear gear mechanism including a first shaft on a side of the rear wheel which transmits a drive force to the rear wheel and to which a drive force from the rear output shaft portion of the output shaft is transmitted; a front shaft arranged between the front output shaft portion of the output shaft and the first shaft of the front gear mechanism; and a rear shaft arranged between the rear output shaft portion of the output shaft and the first shaft of the rear gear mechanism; wherein the front output shaft portion of the output shaft, the first shaft of the front gear mechanism, the rear output shaft portion of the output shaft, and the first shaft of the rear gear mechanism are arranged substantially coaxial with each other; the front shaft and the first shaft of the front gear mechanism are coupled together by a first spherically shared spline; the front shaft and the front output shaft portion of the output shaft are coupled together by a second spherically shared spline; the rear shaft and the rear output shaft portion of the output shaft are coupled together by a third spherically shared spline; and the rear shaft and the first shaft of the rear gear mechanism are coupled together by a fourth spherically shaped spline.