Propelling drive transmission structure for walking operator type lawn mower

摘要

A propelling drive transmission structure for a walking operator type lawn mower having vertically adjustable front and rear wheels and a main frame supporting a cutting blade housing between the front and rear wheels. The transmission structure comprises a change speed device disposed above a rear axle for changing speed of engine drive for transmission to the rear axle. The change speed device includes an output shaft operatively connected to the rear axle through a rotary shaft and bevel gears. The rotary shaft is slidable relative to the output shaft to vary spacing between the output shaft and the rear axle.