Patent ID: 7610985
Filing Date: 2009-11-03
Classification: A01D

Abstract:
1. A working vehicle comprising: a vehicle frame; a driving power source; a pair of first and second driving wheels; a first hydraulic motor operatively outputting rotational power toward the first driving wheel through a first motor shaft; a second hydraulic motor operatively outputting rotational power toward the second driving wheel through a second motor shaft; first and second hydraulic pumps operatively connected to the driving power source; an attachment frame detachably mounted to the vehicle frame; wherein the attachment frame includes first and second side plates and a top plate, the first and second side plates being positioned on one side and the other side in a vehicle width direction and extending substantially vertical so as to face the first and second driving wheels, respectively, in a state where the attachment frame is mounted to the vehicle frame as a reference, and a top plate lying substantially horizontally between the first and second side plates in a state where the attachment frame is mounted to the vehicle frame as a reference; wherein the driving power source includes a driving shaft extending substantially vertical, and is supported on an upper surface of the top plate in a state where a free end portion of the driving shaft is positioned below the top plate through an opening formed at the top plate; and wherein the first and second hydraulic pumps, the first and second hydraulic motors and the driving power source are supported by the attachment frame in a state where the first and second hydraulic pumps are operatively connected to the driving shaft of the driving power source through a pulley/belt mechanism positioned below the top plate and in a state where the first and second hydraulic pumps are fluidly connected to the first and second hydraulic motors, respectively, so as to form first and second traveling hydrostatic transmissions in cooperation with the first and second hydraulic motors, so that the first and second hydraulic pumps, the first and second hydraulic motors, the driving power source and the attachment frame forms an assembly that is detachably mounted to the vehicle frame.