| 摘要 |
<p>PROBLEM TO BE SOLVED: To enhance a cooling efficiency for a main clutch in a work vehicle equipped with a hydraulic clutch mechanism and a hydraulic rise-and-fall mechanism, and concurrently, with a wet type multiple disc clutch connecting/ disconnecting the output of an engine. SOLUTION: Let drain oil from a flow divider for a hydraulic rise-and-fall device and drain oil for lubricating and cooling a hydraulic clutch, be joined so as to allow a wet type multiple disc clutch 21 to be cooled. A relief valve 102 for the main clutch 21 is provided at the downstream of a hydraulic circuit for a relief valve 101 for lubricating and cooling a hydraulic clutch mechanism. A rotating shaft 23 pivoting the main clutch 21 is made to be hollow in structure, and the rear end part of the rotating shaft is opened, so that cooling oil from a drain circuit is thereby fed therein. An oil fence is provided in the inner side of an opened part at the rear end of the shaft 23. In addition, a pipe 105 feeding working oil to the rear portion of the shaft 23 is disposed, and the tip end of the pipe 105 is formed into a nozzle shape.</p> |
