WORKING MACHINE

To reduce a rattle that occurs between a front part machine body and a rear part machine body in a working machine in which the front part machine body and the rear part machine body are connected in a relatively rotatable manner.SOLUTION: A working machine comprises: a rear part machine body equipped with a driver's seat; a front part machine body fitted with a working tool; a center shaft comprising a first axis extending in a front-back direction; a first support part supporting the center shaft rotatably around the first axis with respect to the rear part machine body; a connection shaft comprising a second axis extending in an up-down direction, and connected to the front part machine body, and a second support part supporting the center shaft rotatably around the second axis with respect to the connection shaft. The first support part comprises a first spherical sliding bearing comprising: a first inner ring comprising a convex curved sliding surface, and attached to an outer peripheral surface of the center shaft; and a first outer ring comprising a concave curved sliding surface, and attached to the rear machine body.SELECTED DRAWING: Figure 25 【課題】前部機体と後部機体とが相対的に回動可能に連結された作業機において、前部機体と後部機体との間に生じるガタツキを低減すること。【解決手段】作業機は、運転席が搭載された後部機体と、作業具が装着される前部機体と、前後方向に延びる第１軸心を有するセンターシャフトと、前記後部機体に対して前記センターシャフトを前記第１軸心回りに回動可能に支持する第１支持部と、上下方向に延びる第２軸心を有し且つ前記前部機体に連結される連結軸と、前記連結軸に対して前記センターシャフトを前記第２軸心回りに回動可能に支持する第２支持部と、を備え、前記第１支持部は、凸状曲面の滑り面を有し且つ前記センターシャフトの外周面に取り付けられる第１内輪と、凹状曲面の滑り面を有し且つ前記後部機体に取り付けられる第１外輪とを有する第１球面滑り軸受を含む。【選択図】図２５