PROBLEM TO BE SOLVED: To improve the maintainability of and the heat dissipation in an electric motor and a battery.SOLUTION: A rotor cover 3 which covers the upper part of a tilling rotor 2 arranged at the lower part of a working implement has a double structure in which a lower cover 3A and an upper cover 3B, separated up and down from each other, are equipped. The electric motor 4 which drives the tilling rotor 2 and the battery 5 which supplies electricity to the electric motor 4 are arranged above the lower cover 3A so that the each upper side part of the electric motor 4 and the battery 5 projects and is exposed upward from the upper cover 3B. An electric wire 18 connecting the electric motor 4 and the battery 5 passes between the lower cover 3A and the upper cover 3B.COPYRIGHT: (C)2013,JPO&INPIT【課題】電動モータ及びバッテリに対するメンテナンス性、並びに、電動モータ及びバッテリの放熱性を向上させる。【解決手段】機体の下部に配備した耕耘ロータ2の上方を覆うロータカバー3を、上下に間隔をあけた下側カバー部3Aと上側カバー部3Bとを備える二重構造に構成し、耕耘ロータ2を駆動する電動モータ4と電動モータ4に給電するバッテリ5とを、下側カバー部3Aの上方に、電動モータ4及びバッテリ5の各上部側が上側カバー部3Bから上方に突出して露出する状態で配備し、下側カバー部3Aと上側カバー部3Bとの間に、電動モータ4とバッテリ5とを接続する電線18を通してある。【選択図】図4
