PROBLEM TO BE SOLVED: To provide a lawn mower with reduced noise.SOLUTION: The lawn mower includes a pinion gear mounted at the rotary shaft part of a motor 4 and rotating integrally coaxially with the rotary shaft part, a first gear 62 meshing with the pinion gear 62 and a second gear 63 meshing with the first gear 62. The first gear is constituted by a tooth part 62B meshing with the pinion gear, and a supporting part 62A supporting the tooth part 62B at around the rotary shaft and formed with wall eliminated parts 62a having a wall eliminated in the axial direction of the rotary shaft, and the second gear 63 is constituted by a tooth part 63B meshing with the first gear 62 and a supporting part 63A supporting the tooth part 63B at around the rotary shaft and formed with wall eliminated parts 63a having a wall eliminated in the axial direction of the rotary shaft. The first gear 62 and the second gear 63 mesh with each other so that the any one of the wall eliminated parts of the first gear 62 and second gear 63, and any other one of non-wall eliminated parts position on a straight line for binding the first gear 62 with the second gear 63.COPYRIGHT: (C)2012,JPO&INPIT【課題】騒音を低減した芝刈機の提供。【解決手段】モータ4の回転軸部に装着され該回転軸部と同軸一体回転するピニオンギアと、ピニオンギアと噛合する第一ギア62と、第一ギア62に噛合する第二ギア63と、を備え、第一ギア62は、ピニオンギアに噛合する歯部62Bと、回転軸周りに歯部62Bを支持し回転軸の軸方向で肉抜きされた肉抜き部62aが形成された支持部62Aとから構成され、第二ギア63は、第一ギア62に噛合する歯部63Bと、回転軸周りに歯部63Bを支持し回転軸の軸方向で肉抜きされた肉抜き部63aが形成された支持部63Aとから構成され、第一ギア62と第二ギア63とは、第一ギア62と第二ギア63とを結ぶ直線上に、第一ギア62と第二ギア63とのいずれか一方の肉抜き部と、いずれか他方の非肉抜き部とが位置するように噛合している【選択図】図5
