Self-propelled grass mower

摘要: The purpose of the invention is to provide a self-propelled grass mower that configured so drive mechanism comprising cutting blade can retract up when an external force applied held by raising and lowering mechanism. Provided comprises motor 30 rotary shaft 30c faces vertical direction, type 35 mounted distal end rotates on plane substantially parallel ground, in which height adjusted moving wherein be moved cylinder 70 lifts applied. disposing steel ball 68b semi-spherical recess 64b formed outer circumferential face dial 60 suspending lift guide rib 73 side.