PROBLEM TO BE SOLVED: To achievement improvement in a support constitution of a truck frame and an oscillation support shaft in a semi-crawler device.;SOLUTION: A semi-crawler type work vehicle integrally comprises final speed reduction cases 16L, 16R at respective ends of rear axle cases 15L, 15R. In the work vehicle, drive sprockets 10L, 10R of crawler travel devices 3L, 3R are mounted to drive shafts 9L, 9R of the final speed reduction cases 16L, 16R, and a support shaft frame 19 is fixed onto an underside of a transmission case 5, shaft support parts 20L, 20R are configured at left and right ends of the support shaft frame 19. The work vehicle is so configured as to comprise oscillation shafts 21L, 21R at the shaft support parts 20L, 20R, and to oscillatively support truck frames 17L, 17R with respect to the oscillation shafts 21L, 21R. Front and rear stretched wheels 11, 12 and idle wheels 13, 13 are supported on the truck frames 17L, 17R, and left and right ends of the support shaft frame 19 are connected and fixed to the left and right final speed reduction cases 16L, 16R.;SELECTED DRAWING: Figure 6;COPYRIGHT: (C)2018,JPO&INPIT
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