Abstract: A work vehicle according to the present embodiment comprises: a vehicle body; a pair of traveling parts disposed on both sides of the vehicle body; a cabin which is a front part of the vehicle body and disposed above the traveling parts; an arm which is disposed above the traveling parts and extends forward from behind the cabin and which is pivoted so as to be capable of swinging upward and downward; a first link for connecting the vehicle body and the arm; a cylinder for swinging the arm; a second link which is disposed between the arm and the traveling parts, and restricts the swing direction of the arm; a first pivoting part for pivoting one end of the first link; and a sixth pivoting part for pivoting the other end of the second link at a protruding end of a protrusion part protruding from the arm.

Abstract: A work vehicle includes an engine mounted on a traveling body, a straight-traveling system transmission path including a first stepless transmission device, and a turning system transmission path including a second stepless transmission device, the work vehicle being configured to combine outputs of the straight-traveling system transmission path and an output of the turning system transmission paths to drive left and right traveling units. The work vehicle also includes control sections that control the outputs of the straight-traveling system transmission path and the output of the turning system transmission paths in cooperation with each other, a transmission operation tool that specifies the output of the straight-traveling system transmission path, and a detector that detects the output of the straight-traveling system transmission path.

Abstract: A work vehicle equipped with: a straight-traveling system transmission path including a first stepless transmission device, a turning system transmission path including a second stepless transmission device, left and right traveling units that receive a driving force from an engine and move the work vehicle in forward and in reverse, and a brake operation tool that actuates a brake mechanism. The output of the straight-traveling system transmission path and the output of the turning system transmission path are combined to drive the traveling units. When the operation amount to the brake operation tool exceeds a first predetermined amount, a control section blocks the driving force output from the first stepless transmission device, and at the same time, sets a swash plate of the second stepless transmission device in a neutral state.

Abstract: A crawler tractor that transfers power of an engine to a driving wheel of a crawler-type travelling device through a transmission case and a front drive axle, the crawler tractor including: a pair of main frames; a pair of truck frames; a pair of lower frames; a pair of rear beams; and a pair of rear housings. Front portions of the pair of main frames are fixedly coupled to front portions of the pair of truck frames through the front drive axle. Longitudinal intermediate portions of the pair of main frames are fixedly coupled to the pair of lower frames. Rear portions of the pair of main frames are fixedly coupled to the pair of rear housings through the pair of rear beams.

Abstract: A work vehicle equipped with: a straight-traveling system transmission path including a first stepless transmission device (17); a turning system transmission path including a second stepless transmission device (13); left and right traveling units (3) that receive a driving force from an engine (5) and move the work vehicle in forward and in reverse; and a brake operation tool (35) that actuates a brake mechanism (751). The output of the straight-traveling system transmission path and the output of the turning system transmission path are combined to drive the traveling units (3). When the operation amount to the brake operation tool (35) exceeds a first predetermined amount, a control section (813, 814) blocks the driving force output from the first stepless transmission device (17), and at the same time, sets a swash plate of the second stepless transmission device (13) in a neutral state.

Abstract: A crawler tractor that transfers power of an engine (3) to a driving wheel (22) of a crawler-type travelling device (2) through a transmission case (5) and a front drive axle (6), the crawler tractor including: a pair of main frames (10); a pair of truck frames (21); a pair of lower frames (27); a pair of rear beams (33); and a pair of rear housings (34). Front portions of the pair of main frames (10) are fixedly coupled to front portions of the pair of truck frames (21) through the front drive axle (6). Longitudinal intermediate portions of the pair of main frames (10) are fixedly coupled to the pair of lower frames (27). Rear portions of the pair of main frames (10) are fixedly coupled to the pair of rear housings (34) through the pair of rear beams (33).

Abstract: A work vehicle including an engine (5) mounted on a traveling body (2), a straight-traveling system transmission path including a first stepless transmission device (17), and a turning system transmission path including a second stepless transmission device (13), the work vehicle being configured to combine outputs of the straight-traveling and turning system transmission paths to drive left and right traveling units (3). The work vehicle also includes control sections (813, 814) that control the outputs of the straight-traveling and turning system transmission paths in cooperation with each other, a transmission operation tool (822) that specifies the output of the straight-traveling system transmission path, and a detector (823) that detects the output of the straight-traveling system transmission path. The control sections select one of an instruction value from the transmission operation tool and an actually measured value from the detector and set the output of the turning system transmission path.

Abstract: A tractor includes a mounting plate, a protruding tube, a boom supporter, and a boom. The mounting plate is attachable to a frame on a side surface of a vehicle. The protruding tube is connected to the mounting plate, and shaped to protrude from a portion in which the protruding tube is connected to the mounting plate, toward the outside of the vehicle. The boom supporter is connected to a distal end portion of the protruding tube, and shaped to protrude upward from a portion in which the boom supporter is connected to the distal end portion of the protruding tube. The boom is coupled to the boom supporter via a boom coupler, and formed to extend from the boom coupler toward the front side of the vehicle. In a side view, an imaginary straight line extending vertically downward from the boom coupler is located rearward of the protruding tube.

Abstract: A working vehicle with a cabin in which, to lift a cabin upward, a lift arm of a hydraulic lifting mechanism can be easily connected to a cabin. The working vehicle has a travel body having an engine mounted on it, the cabin having an operation seat for an operator, a steering wheel, etc., a link mechanism for connecting a working section to the travel body, the hydraulic lifting mechanism for lifting the working section connected to the link mechanism off the ground, and a lifting rod for detachably connecting the lifting arm of the hydraulic lifting mechanism and the link mechanism. A cabin support body is placed at the lower end of the front of the cabin. The hydraulic lifting mechanism is placed below the rear of the cabin. The upper face side of the hydraulic lifting mechanism is opened by rotating the cabin about the cabin support body. The working vehicle has a projection body engaging the cabin from below, and the projection body is detachably connected to the lifting arm.

Abstract: A tractor includes a mounting plate, a protruding tube, a boom supporter, and a boom. The mounting plate is attachable to a frame on a side surface of a vehicle. The protruding tube is connected to the mounting plate, and shaped to protrude from a portion in which the protruding tube is connected to the mounting plate, toward the outside of the vehicle. The boom supporter is connected to a distal end portion of the protruding tube, and shaped to protrude upward from a portion in which the boom supporter is connected to the distal end portion of the protruding tube. The boom is coupled to the boom supporter via a boom coupler, and formed to extend from the boom coupler toward the front side of the vehicle. In a side view, an imaginary straight line extending vertically downward from the boom coupler is located rearward of the protruding tube.

Abstract: A working vehicle with a cabin, in which, to lift a cabin (7) upward, a lift arm (115) of a hydraulic lifting mechanism (20) can be easily connected to a cabin (7). The working vehicle has a travel body (2) having an engine (5) mounted on it, the cabin (7) having an operation seat (8) for an operator, a steering wheel (9), etc., a link mechanism (21) for connecting a working section to the travel body (2), the hydraulic lifting mechanism (20) for lifting the working section connected to the link mechanism (21) off the ground, and a lifting rod (116) for detachably connecting the lifting arm (115) of the hydraulic lifting mechanism (20) and the link mechanism (21). A cabin support body (183) is placed at the lower end of the front of the cabin (7). The hydraulic lifting mechanism (20) is placed below the rear of the cabin (7). The upper face side of the hydraulic lifting mechanism (20) is opened by rotating the cabin (7) about the cabin support body (183).

Abstract: A traveling vehicle, wherein a power transmission system for traveling straight forward, a power transmission system for turning, a power transmission system for PTO, and a power transmission system for driving a pump are disposed in a transmission part integrally with each other and a transmission device for traveling straight forward and a continuously variable transmission device for turning are interlockingly installed in the transmission part continuously with each other in a parallel state, whereby the transmission systems can be compactly disposed in the transmission part, and all of the power transmission system for traveling straight forward, the power transmission system for turning, the power transmission system for PTO, and the power transmission system for driving the pump can be easily assembled by merely installing the transmission part on a body frame.

Abstract: A traveling vehicle, wherein a power transmission system for traveling straight forward, a power transmission system for turning, a power transmission system for PTO, and a power transmission system for driving a pump are disposed in a transmission part integrally with each other and a transmission device for traveling straight forward and a continuously variable transmission device for turning are interlockingly installed in the transmission part continuously with each other in a parallel state, whereby the transmission systems can be compactly disposed in the transmission part, and all of the power transmission system for traveling straight forward, the power transmission system for turning, the power transmission system for PTO, and the power transmission system for driving the pump can be easily assembled by merely installing the transmission part on a body frame.

Abstract: In a hydraulic travelling agricultural machine which includes travelling sections, a pump operating unit is disposed in an operating section for controlling the steering and speed change of the travelling sections. The pump operating unit is connected interlockingly to a pair of varible flow rate control pumps via a link mechanism for a spool, and is operated by a steering mechanism and a speed changing mechanism. Accordingly, the natural vibration occurring in the variable flow rate control pumps is obsorbed by the link mechanisms, and hence the vibration transmitted to the pump operating unit is attenuated. The propagation of the vibration to the steering mechanism and the speed changing mechanism is thereby inhibited.

Abstract: One operating lever is provided for moving a traveling vehicle with a working machine back and forth and the working machine vertically and operating a sub-transmission. A sub-transmission switch is provided in a recessed portion formed in a grip of a back-and-forth operating lever so that a quick operation can be effected by a single hand without any mistake. In addition, the working machine vertically moving lever is constructed so as to interlock with a spool of a vertical motion control valve via a motor so that the speed of the motor is gradually reduced when the working machine vertically moving lever (32) is in a lowering operation, thereby preventing a drastic lowering.