Abstract: In a working vehicle having a tilt floor, a torsion bar has one end mounted on the tilt floor and the other end thereof mounted on a base frame, and is disposed on the tilt floor which is tilted up and down relative to the base frame. In a maximally opened position where the tilt floor is tilted up and a closed position where the tilt floor is tilted down, a position of a barycenter (G) of the tilt floor on which the driving room (C) is disposed is opposite from each other relative to a turning center of the tilt floor across the top dead center.

Abstract: There is provided a working vehicle designed such that, even in a smaller machine type, a fuel tank is easily attached or detached, overall configuration is not costly, an operating space can be increased, interior comfort is improved, and in addition, a width dimension of an opening for entry to or exit from a cabin is sufficiently secured, and satisfactory maintenance is ensured. The working vehicle comprises a cabin C which has a rear wall surface Cf having a circular arc shape formed around a rotation shaft sa of an upper rotation body 3. A planar shape formed by integrating a revolving frame R serving as a base of the upper rotation body 3, and a counterweight w fixed to the revolving frame R, is substantially the same as a planar shape of the cabin C, as viewed from above. A fuel tank having a shape along internal wall surfaces of the counterweight w is fixed to the counterweight w via pressing members.

Abstract: In a working vehicle having a tilt floor (7), the tilt floor can easily be tilted up and down. Maintenance around an engine can excellently be carried out. A torsion bar (9), which has one end mounted on the tilt floor and the other end thereof mounted on a base frame, is disposed on the tilt floor which is tilted up and down relative to the base frame. In a maximally opened position where the tilt floor is tilted up and a closed position where the tilt floor is tilted down, a position of a barycenter (G) of the tilt floor on which the driving room (C) is disposed is opposite from each other relative to a turning center of the tilt floor across the top dead center. A neutral position of the torsion bar is between the closed position and the maximally opened position.

Abstract: A counterweight for a hydraulic shovel, which is applicable to a compact to large-sized hydraulic shovels, and is capable of realizing favorable engine maintainability and assurance of sufficient mass, is provided. For this purpose, supporting column portions (12b, 12c) are vertically provided at left and right of a counterweight (12). The left and right supporting column portions are constituted as an increase amount of mass of the counterweight. At least one of a floor frame (30), a canopy (40), outer casings (14, 16) and engine partition walls (33a, 33b) is supported at the left and right supporting column portions. Further, an engine (13) is placed at a position fronting to between the left and right supporting column portions.

Abstract: A counterweight for a hydraulic shovel, which is applicable to a compact to large-sized hydraulic shovels, and is capable of realizing favorable engine maintainability and assurance of sufficient mass, is provided. For this purpose, supporting column portions (12b, 12c) are vertically provided at left and right of a counterweight (12). The left and right supporting column portions are constituted as an increase amount of mass of the counterweight. At least one of a floor frame (30), a canopy (40), outer casings (14, 16) and engine partition walls (33a, 33b) is supported at the left and right supporting column portions. Further, an engine (13) is placed at a position fronting to between the left and right supporting column portions.