Patent ID: 6722464
Filing Date: 2004-04-20
Classification: B60K,B60Y,B62D,F16H

Abstract:
A working vehicle comprising:an engine; a main clutch for connecting and disconnecting drive from said engine; a hydrostatic stepless transmission with a pump and a motor for changing speed of the drive transmitted from said main clutch; a front vehicle body supporting said engine; a rear vehicle body comprising a transmission case housing a propelling transmission for receiving speed-changed drive from said hydrostatic stepless transmission; and an intermediate vehicle body connected to said front vehicle body and said rear vehicle body to constitute a body of the working vehicle in combination with said front vehicle body and said rear vehicle body; wherein said intermediate vehicle body comprises a case block housing said hydrostatic stepless transmission; said case block includes, formed integral with one another, a small diameter portion connected to said rear vehicle body and providing case walls for said pump and said motor, a large diameter portion connected to said front vehicle body and having an upper edge at a higher level than an upper surface of said small diameter portion, and a transitional portion disposed between said small diameter portion and said large diameter portion; said large diameter portion defines an accommodating space for said main clutch; said transitional portion houses a shaft supporting wall portion for supporting a main clutch transmission shaft for outputting engine drive from said main clutch transmission shaft for outputting engine drive from said main clutch, and further supporting a pump rotary shaft provided for said pump as an input shaft of said hydrostatic stepless transmission for receiving said engine drive; and said shaft supporting wall portion includes: a first partition having bearings for supporting forward ends of said pump rotary shaft and a motor rotary shaft provided for said motor as an output shaft of said hydrostatic stepless transmission; a second partition having a bearing for supporting a rearward end of a first transmission gear mounted on an end of said pump rotary shaft extending through said first partition, and a bearing for supporting a rearward end of a second transmission gear formed on a rear end region of said main clutch transmission shaft; and a third partition having bearings for supporting forward regions of said first and second transmission gears, dividing an arranging space of said transmission gears from said accommodating space of said main clutch and having a lid member detachably attached to said second partition.