BREATHER STRUCTURE OF WORKING MACHINE

To shorten a length of a breather tube, and to suppress the clogging of the breather tube caused by freezing.SOLUTION: A working machine (1) comprises a machine body 3, working parts (6, 7) arranged at the machine body 3, traveling parts (4) arranged at left and right sides of the machine body 3, and drive sources (10, 18) arranged at the machine body 3 so as to drive the working parts and the traveling parts. At least one gear case 41 for defining a gear chamber 42 which accommodates a gear 43 for connecting the drive sources to the traveling parts so as to be transmittable in power is arranged at the machine body 3. The drive sources include an engine 10 which is mounted to an upper part of the machine body 3. The other end 70b of the breather tube 70 having one end 70a communicating with the gear chamber 42 and the other end 70b opened to the outside is arranged in a space 50 which is formed between the machine body 3 and the engine 10.SELECTED DRAWING: Figure 3 【課題】ブリーザチューブを短くし、且つ凍結によるブリーザチューブの目詰まりを抑制する。【解決手段】作業機（１）は、機体３と、機体３に設けられた作業部（６、７）と、機体３の左右に設けられた走行部（４）と、作業部及び走行部を駆動するために機体３に設けられた駆動源（１０、１８）とを備える。駆動源を走行部に動力伝達可能に接続するギア４３を収容するギア室４２を画定する少なくとも１つのギアケース４１が機体３に設けられる。駆動源は機体３の上部に搭載されたエンジン１０を含む。ギア室４２に連通する一端７０ａ及び外部に開放される他端７０ｂを有するブリーザチューブ７０の他端７０ｂが、機体３とエンジン１０との間に形成される空間５０に配置される。【選択図】図３