Abstract: There is provided a wheel motor device comprising a hydraulic motor main body, a speed reduction gear mechanism for reducing a speed of a rotational output of the hydraulic motor main body, an output member for outputting the rotational output whose speed has been reduced by the speed reduction gear mechanism to a driving wheel and a casing for accommodating the hydraulic motor main body and the speed reduction gear mechanism. The casing has a motor space and a gear space for respectively accommodating the hydraulic motor main body and the speed reduction gear mechanism, the motor space being capable of storing fluid in a state of being liquid-tightly separate from the gear space. The casing is provided with a flow-in port for introducing fluid into the motor space and a flow-out port for discharging fluid outward from the motor space.

Abstract: Disclosed is a load controller for use in a hydrostatic transmission for a work vehicle. Power supplied from an engine is branched to drive an implement system and a traveling system. The hydrostatic transmission connects, in an oil-hydraulic closed circuit, an oil-hydraulic pump driven by the engine and an oil-hydraulic motor driven by the oil-hydraulic pump. The load controller includes a bypass oil line for bypassing an oil line that has high pressure during forward movement in the oil-hydraulic closed circuit to reach an oil line that has low pressure during forward movement or an oil tank; a first opening/closing valve for opening or closing the bypass oil line; and an opening/closing valve controller that detects a load applied to the engine while traveling during working and opens the first opening/closing valve when the load exceeds a predetermined level.

Abstract: There is provided a there is provided a working vehicle including: a hydraulic pump unit including a hydraulic pump main body operatively driven by a driving power source, and a pump case accommodating the hydraulic pump main body and having an inner space capable of storing oil; a hydraulic motor unit spaced apart from the hydraulic pump unit so as to operatively drive a corresponding driving wheel, the hydraulic motor unit including a hydraulic motor main body fluidly connected to the hydraulic pump main body so as to form an HST in cooperation with the hydraulic pump main body, and a motor case accommodating the hydraulic motor main body and having an inner space capable of storing oil; an auxiliary pump unit including an auxiliary pump main body operatively driven by the driving power source; a circulation line for fluidly connecting the auxiliary pump main body, the pump case and the motor case so that at least a part of oil, which has been discharged from the auxiliary pump main body, returns to a sucti

Abstract: The present invention provides a load controller for use in a hydrostatic transmission for a work vehicle that is free from control failure caused by deterioration of the constituent components, and that can be miniaturized and simplified in structure compared to conventional load controllers. In the work vehicle, power supplied from an engine (E) is branched to drive an implement system and a traveling system. A hydrostatic transmission (1) is provided in the traveling system. The hydrostatic transmission (1) connects, in an oil-hydraulic closed circuit, an oil-hydraulic pump (2) driven by the engine (E) and an oil-hydraulic motor (4) driven by the oil-hydraulic pump (2).

Abstract: There is provided a pump system including a housing capable of reserving oil in an internal space; an input shaft supported by the housing so as to be operatively connected to a driving source; a pump shaft supported by the housing; a hydraulic pump body which is accommodated in the housing and is driven by the pump shaft; a PTO shaft supported by the housing; a power transmission gear train which transmits a power from the input shaft to the pump shaft and the PTO shaft, and is accommodated in the housing; and a PTO clutch mechanism accommodated in the housing so as to be positioned in a power transmission path from the input shaft to the PTO shaft. The power transmission gear train has at least two first and second transmission gears meshed with each other.

Abstract: A power-dividing device for a working vehicle includes a case member, an input shaft supported by the case member so that a first end portion of the input shaft can be operatively connected to a driving source, a PTO unit having a PTO shaft supported by the case member so as to be offset with respect to the input shaft, a power transmission mechanism accommodated in the case member to transmit power from the input shaft to the PTO shaft, and a first pump unit having a first pump shaft operatively connected to the input shaft and being fluid-connected to an actuator disposed outside.