Pump unit and working vehicle

摘要

There is provided a pump unit (1) for transmitting mechanical power from a driving source (150) through fluid power to first and second hydraulic motor units (160a,160b) allocated and arranged on both sides in a width direction of a vehicle so as to be output to a pair of right and left driving wheels (120). The pump unit (1) includes an input shaft (10) operatively connected to the driving source (150); first and second pump shafts (200,206) operatively connected to the input shaft (10); first and second hydraulic pump bodies (30a,30b) driven by the first and second pump shafts (20a,20b), respectively, and fluidly connected to the first and second hydraulic motor units (160a,160b), respectively; a housing (40) for supporting the input shaft (10), the first pump shaft (20a) and the second pump shaft (20b) and, also, containing therein the first and second hydraulic pump bodies (30a,30b); and a PTO device contained in the housing. The PTO device (50) has a PTO shaft (51) supported by the housing (40) so as to be substantially parallel to the input shaft (10). The housing (40) is configured to support the input shaft (10) and the PTO shaft (51) so that the input shaft (10) is arranged at substantially a central portion in the width direction of the vehicle and the PTO shaft (51) is displaced to and arranged on one side in the width direction of the vehicle with said input shaft as a reference, when the housing (40) is mounted in the working vehicle.