Abstract: Rigidity of a frame of a working vehicle is improved by a simple structure and production costs are reduced by reducing the number of parts of a working vehicle. Pipes 66 are provided on both left and right sides at the center in the front-rear direction of a side frame 62, and each pipe 66 has a rectangular cross-section and penetrates an intermediate partition in the front-rear direction from a mast section 64 up to a transmission section. Tie-down holes are formed in a front face plate 61 to which the front end of a frame 9 is connected, and a plate 64b connected to a side frame 62 is provided at the bottom surface of each mast section 64 protruding outward from the side frame 62. Tanks installed on the working vehicle are suspended from the plate bodies 64b, and a lift arm installation boss provided at each mast section 64 is supported at both ends. A U-shaped reinforcement member 81 connects the upper surface of mast partition plate of a mast section 64 and left and right bosses.

Abstract: A lift arm having a plate-like structure that is capable of taking a large load is realized without increasing a plate thickness and at low cost. The structure with required strength and of low cost is realized by a simple construction and achieves, at the same time, both weight lightening of a loader and sufficient load bearing performance. In a loader (2) of a working machine (1), connection sections between a cross member (176) and lift arms (171) are each formed in a shape broadening from the cross member (176) toward a lift arm (171). Further, reinforcement plates are attached to outer surfaces of a front loader (2) so as to overlap the connection sections between the cross member (176) and the lift arms (171). Contact members (171b, 171b) are attached to lower side faces at the heads of the lift arms (171) to restrict the amount of rotation of a working device installed on the heads of the lift arms (171).

Abstract: Production of a working vehicle frame consumes high costs because it requires high rigidity. A simple construction improves the rigidity of the frame and reduces costs required for the production. In a structure of a frame (9) for a working vehicle (1), side sections of the frame (9) are constructed in a boat form, and, in a front view, the width of a lower section of the frame (9) is set smaller than that of the central section in the vertical direction of the frame (9). Further, a mast plate (63) for supporting a front loader (2) and a front axle installation plate section (75) are integrated, and side frames (62) constructing the side section of the frame (9) and the mast plate (63) are jointed in a lateral T shape in a side view.

Abstract: Production of a working vehicle frame consumes high costs because it requires high rigidity A simple construction improves the rigidity of the frame and reduces costs required for the production. In a structure of a frame (9) for a working vehicle (1), side sections of the frame (9) are constructed in a boat form, and, in a front view, the width of a lower section of the frame (9) is set smaller than that of the central section in the vertical direction of the frame (9). Further, a mast plate (63) for supporting a front loader (2) and a front axle installation plate section (75) are integrated, and side frames (62) constructing the side section of the frame (9) and the mast plate (63) are jointed in a lateral T shape in a side view.

Abstract: Rigidity of a frame of a working vehicle is improved by a simple structure and production costs are reduced by reducing the number of parts of a working vehicle. Pipes 66 are provided on both left and right sides at the center in the front-rear direction of a side frame 62, and each pipe 66 has a rectangular cross-section and penetrates an intermediate partition in the front-rear direction from a mast section 64 up to a transmission section. Tie-down holes are formed in a front face plate 61 to which the front end of a frame 9 is connected, and a plate 64b connected to a side frame 62 is provided at the bottom surface of each mast section 64 protruding outward from the side frame 62. Tanks installed on the working vehicle are suspended from the plate bodies 64b, and a lift arm installation boss provided at each mast section 64 is supported at both ends. A U-shaped reinforcement member 81 connects the upper surface of mast partition plate of a mast section 64 and left and right bosses.

Abstract: A stabilizer installed on a work vehicle to hold the stability of a vehicle body in excavating operation and capable of preventing the ground-contact surface of a stabilizer pad from being inverted upward when the attitude of the stabilizer pad installed at the outer tip of the vehicle body is not stabilized. A balancer 25 is fitted to the end of the stabilizer pad 30. A downward moment always acts on the stabilizer pad 30 about a stabilizer pad pivot 26 (direction of solid arrow ? in the figure) by the weight of the balancer 25. Thus, the stabilizer pad 30 can always keep its attitude with its ground-contact surface facing downward irrespective of the vertical rotation of a leg body 23.

Abstract: A lift arm having a plate-like structure that is capable of taking a large load is realized without increasing a plate thickness and at low cost. The structure with required strength and of low cost is realized by a simple construction and achieves, at the same time, both weight lightening of a loader and sufficient load bearing performance. In a loader (2) of a working machine (1), connection sections between a cross member (176) and lift arms (171) are each formed in a shape broadening from the cross member (176) toward a lift arm (171). Further, reinforcement plates are attached to outer surfaces of a front loader (2) so as to overlap the connection sections between the cross member (176) and the lift arms (171). Contact members (171b, 171b) are attached to lower side faces at the heads of the lift arms (171) to restrict the amount of rotation of a working device installed on the heads of the lift arms (171).