PROBLEM TO BE SOLVED: To provide a self-propelled riding lawn mower whose floor is lowered to improve the getting-on or off property of an operator without deteriorating the efficiency of lawn mowing work.SOLUTION: The self-propelled riding lawn mower includes mower blade-driving motors 15 and 15 directly connected to rotation shafts c of the mower blades 1 and 1 near chassis 11 and 11, the chassis 11 and 11 are provided with expanded portions 2 and 2 (avoiding portions) for avoiding the contact of the motors 15 and 15 for driving mower blades in the chassis, and the motors 15 and 15 for driving the mower blades are disposed on the insides of the expanded portions 2 and 2 in a state that the motors are superposed with each other in a side view.COPYRIGHT: (C)2011,JPO&INPIT【課題】芝刈り作業の効率性を損なうことなく、フロアの低床化により乗降性を向上させた自走式の乗用草刈機を提供する。【解決手段】シャーシ11,11の近傍に、モアブレード1,1の回転軸芯cに直結するモアブレード駆動用モータ15,15を備え、シャーシ11,11には、モアブレード駆動用モータ15,15の接触を回避する膨出部2,2(回避部)を設けるとともに、モアブレード駆動用モータ15,15は、膨出部2,2に側面視重複させて、膨出部2,2の内側に設置した。【選択図】図4
