PROBLEM TO BE SOLVED: To prevent deterioration in straightness of a machine body caused by phase shift of right and left cultivation rotors on a cultivation work.SOLUTION: In a power-connecting/disconnecting structure of a walking type working machine in which side clutches 22 for connecting/disconnecting transmission from an output rotor (A) to respective driving shafts 8 are disposed between the output rotor (A) and right and left driving shafts 8 for cultivation rotors, a plurality of engaging portions 22A enabling engage-connection of the output rotor (A) to the driving shafts 8 are distributedly arranged at three or more places on the circumferential direction of the output rotor (A) and the driving shafts 8 in a state that at least one place arrangement distance is different from other place arrangement distances, and the side clutches 22 are disposed in a state that at least one of the engaging portions 22A is arranged in unequal distances.COPYRIGHT: (C)2014,JPO&INPIT【課題】左右の耕耘ロータの位相ズレに起因した耕耘作業時における機体の直進性の低下を防止する。【解決手段】出力回転体Aと耕耘ロータ用の左右の駆動軸8との間のそれぞれに、出力回転体Aから対応する駆動軸8への伝動を断続するサイドクラッチ22を備えた歩行型作業機の動力断続構造において、出力回転体Aと駆動軸8との噛み合い連結を可能にする複数の噛合部22Aを、出力回転体A及び駆動軸8の周方向に、少なくとも1箇所の配置間隔を他の箇所の配置間隔と異ならせた状態で3箇所以上に分散配備して、サイドクラッチ22を、少なくとも複数の噛合部22Aの一部を不等間隔に配備した状態に構成した。【選択図】図6
