Patent ID: 7337563
Filing Date: 2008-03-04
Classification: E02F

Abstract:
1. A work vehicle comprising: a traveling vehicle; a backhoe having a base frame detachably connected to a rear portion of the traveling vehicle and an excavator detachably attached to a rear portion of the base frame, said base frame including a pair of upper and lower base plates and a partitioning wall disposed at a fore-and-aft intermediate portion of the base plates for connecting the two base plates with each other and partitioning a space delimited between the plates relative to a fore and aft direction; a control box mounted on the base frame; a swing cylinder device mounted to the base frame through the partitioning wall for pivoting the excavator, the swing cylinder device including a first swing cylinder and a second swing cylinder which are juxtaposed along a right/left direction; a first fluid feed/discharge port device to/from the first swing cylinder, the first fluid feed/discharge port device including a first port defined on the side of a cylinder tube of the first swing cylinder and a second port defined on the side of a cylinder rod of the first swing cylinder, these first and second ports opening toward the second swing cylinder; a second fluid feed/discharge port device to/from the second swing cylinder, the second fluid feed/discharge port device including a first port defined on the side of a cylinder tube of the second swing cylinder and a second port defined on the side of a cylinder rod of the second swing cylinder, these first and second ports opening toward the second swing cylinder; a control valve unit attached to the partitioning wall downwardly of the control box for controlling a working fluid for driving the first and second swing cylinders and the excavator; a swing hose device extended through the partitioning wall for hydraulically connecting the control valve unit to the first and second swing cylinders; a pair of first hose connecting member projecting from said each first port, the pair of first hose connecting members being arranged in symmetry along the right/left direction between the first and second swing cylinders; and a pair of second hose connecting members projecting from said each second port the pair of second hose connecting members being arranged in symmetry along the right/left direction between the first and second swing cylinders.