| 摘要 |
The present invention makes it possible, in an HST drive circuit wherein an HST pump and an HST motor have been separately stored in a pump case and a motor case, to efficiently cool the HST drive circuit. A cooling line for, while discharging a relief oil from a charge circuit 9 for replenishing an HST closed circuit 5 with a pressure oil into a pump case 3 , making the discharged oil flow into a reservoir 7 through the pump case 3 , a communicating pipe 14 , a motor case 4 , and an oil cooler 16 is formed, so that hydraulic oil circulating through an HST pump 1 , an HST motor 2 , and the HST closed circuit 5 is cooled by an oil flowing through the cooling line.
|
