| 摘要 |
In order to achieve high output from a transmission case including a hydromechanical transmission while ensuring high efficiency, lightness, and low cost for the hydromechanical transmission, the present invention provides a work vehicle such as a tractor including a transmission case 17 which is provided with a main transmission input shaft 511 to which power is transmitted from an engine 5, and a main transmission output shaft 512 which is fitted into the main transmission input shaft 511 so as to be relatively rotatable. On the main transmission input shaft 511, a hydraulic pump part 521, a cylinder block 800, and a hydraulic motor part 522, which constitute a hydromechanical transmission 500, are disposed in series. Shifted power is transmitted to the main transmission output shaft 512 through the hydraulic motor part 522. The transmission case 17 is provided with: a planetary gear mechanism 526 which combines the power from the engine 5 with the shifted power to the main transmission output shaft 512; and a transmission shaft 535 capable of transmitting the shifted power via the main transmission output shaft 512 and the combined power via the planetary gear mechanism 526. |
