Loader work machine

Abstract

A loader work machine has a base frame including a cabin; a loader work apparatus attached to the base frame; and two traveling apparatuses supporting the base frame, and including: a track frame connected to the base frame; a drive wheel driving a traveling belt; front and rear idlers arranged in a front-back direction below the drive wheel and supported by the track frame; and one or more track rollers arranged between the front and rear idlers and supported by the track frame, the traveling belt stretched around the drive wheel, idlers, and track rollers. The base frame includes: a lower frame connected to two track frames and interposed between the traveling apparatuses; an upper frame provided with the loader work apparatus; and a slewing apparatus connecting the upper and lower frames. The upper frame connected to the lower at an upper frame bottom surface being above the traveling belts.

What is claimed is: 
     
         1 . A loader work machine comprising
 a base frame including a cabin;   a loader work apparatus attached to the base frame; and   a pair of traveling apparatuses that support the base frame, wherein   the traveling apparatuses each include: a track frame connected to the base frame; a drive wheel that rotationally drives a traveling belt; a front idler and a rear idler that are arranged in a front--back direction below the drive wheel and are rotatably supported by the track frame; and one or more track rollers that are arranged between the front idler and the rear idler and are rotatably supported by the track frame, the traveling belt being stretched around the drive wheel, the front idler, the rear idler, and the track rollers,   the base frame includes: a lower frame that is connected to a pair of the track frames and is interposed between the pair of traveling apparatuses; an upper frame that is provided with the loader work apparatus and is arranged above the lower frame; and a stewing apparatus that slewably connects the upper frame to the lower frame, and   the upper frame is connected to the lower frame at a position at which a bottom surface of the upper frame is above the traveling belts.   
     
     
         2 . The loader work machine according to  claim 1 , wherein
 the slewing apparatus includes a slewing bearing, and is capable of slewing the upper frame 360 degrees with respect to the lower frame.   
     
     
         3 . The loader work machine according to  claim 1 , wherein
 the loader work apparatus includes a pair of right and left booms supported by the base frame; a work tool provided to leading ends of the pair of booms; and a swinging apparatus capable of swinging the pair of booms in a top-bottom direction, and   the loader work apparatus further includes a moving apparatus capable of moving the pair of booms forward,   
     
     
         4 . The loader work machine according to  claim 3 , wherein
 the moving apparatus includes movement cylinders that are supported by the base frame and are each made of a hydraulic cylinder; and link members that are turnably supported by the base frame and each have one end connected to each of the movement cylinders and another end connected to each of the pair of booms,   the swinging apparatus includes boom cylinders that are supported by the base frame and are each made of a hydraulic cylinder, and   the pair of booms are made movable forward by respectively driving the link members by the movement cylinders in a state where the pair of booms are respectively supported by the boom cylinders,