Yanmar Co., Ltd.

Yanmar Power Technology Co., Inc.

Toshiyuki Miwa

Kouhei Ogura

Kenta Ikenori

Katsunori Katou

Takeshi Miyazaki

Dai Uehara

Takeshi Hasebe

Yuji Kitasaka

The present describes a work vehicle where an operator can, on the work vehicle side, confirm which working machine is engaged and set which working machine to engage. A tractor, to which a working machine can be mounted, is provided with: a liquid crystal panel selectably displaying an engageable working machine mounted and displaying the currently engaged working machine so as to be identifiable; an operation unit (encoder dial, enter button, and command buttons) for carrying out selection and determination operations for the working machine displayed on the liquid crystal panel; and a control device that, when a determination operation is carried out by the operation unit for a desired working machine, disengages the currently engaged working machine, and configures the working machine for which the determination operation has been carried out to be engaged.

Work vehicle

This work vehicle (tractor), which is provided with an engine and an accelerator pedal capable of changing the operational state of the engine, and is configured to be free to travel by means of an operation of the accelerator pedal by an operator, is equipped with a display near an operator's seat, said display being configured to be capable of displaying a screen (travel customization screen) for selecting whether or not to allow travel in conjunction with the accelerator.

A work vehicle according to an aspect of the present invention is configured to shift, in a transmission unit, a speed of a driving force from an engine mounted on a traveling body and to transfer the shifted driving force to a traveling unit and a work unit. The work vehicle includes: a mode shift switch that is configured to shift a maximum vehicle speed by the traveling unit or a maximum number of revolutions of the engine, the maximum vehicle speed and the maximum number of revolutions being set for each of a plurality of modes; and a work unit operation lever that is configured to be used for operating the work unit. The work unit operation lever is provided with the mode shift switch.

A tractor in which a lift valve of a hydraulic system for lifting up/down a work machine is mechanically coupled to a lift lever, and conditions for an engine startup are set as follows: a reverser lever is at a neutral position thereof; a PTO (power take-off) clutch is disengaged; a seat switch is ON; and the lift lever is at a lowermost position thereof. A switch driving unit is provided on a side face of the lift lever so that the side face is orthogonal to a turning direction of the lift lever; a switch is provided so as to be opposed to the switch driving unit when the lift lever is turned to be at the lowermost position; and the lift lever at the lowermost position is detected by the switch.

Tractor

A work vehicle includes an engine mounted on a traveling body including traveling wheels; a hydraulic stepless transmission that shifts a speed of the driving force from the engine; a gear shift pedal that performs an acceleration/deceleration operation of a shifted output from the hydraulic stepless transmission; and a control section that controls the engine and the hydraulic stepless transmission based on the operation amount of the gear shift pedal. When an operation on a set switch is received in a state where the gear shift pedal is pressed by a foot operation in an auto-cruise standby mode, the control section stores the vehicle speed and the number of engine revolutions in accordance with the foot operation position of the gear shift pedal and shifts to an auto-cruise mode.

The objective of the present invention is to provide a work vehicle where an operator can, on the work vehicle side, confirm which working machine is engaged and set which working machine to engage. A tractor, to which a working machine can be mounted, is provided with: a liquid crystal panel selectably displaying an engageable working machine mounted and displaying the currently engaged working machine so as to be identifiable; an operation unit (encoder dial, enter button, and command buttons) for carrying out selection and determination operations for the working machine displayed on the liquid crystal panel; and a control device that, when a determination operation is carried out by the operation unit for a desired working machine, disengages the currently engaged working machine, and configures the working machine for which the determination operation has been carried out to be engaged.

A work vehicle including: a hydraulic stepless transmission that shifts a speed of a driving force from an engine; a gear shift pedal that performs an acceleration/deceleration operation of a shifted output from the hydraulic stepless transmission; a control section that controls the engine and the hydraulic stepless transmission based on an operation amount of the gear shift pedal; and acceleration/deceleration switches that increase and reduce a vehicle speed in performing an auto-cruise mode. The control section stores a set maximum vehicle speed. In a case where the acceleration/deceleration switches are operated in the auto-cruise mode, the control section increases and reduces the vehicle speed stored in shifting to the auto-cruise mode based on the amount of change in accordance with the maximum vehicle speed.

A work vehicle accurately informs an operator of necessity of a regeneration operation and the manner thereof, and specific information on the regeneration operation. The work vehicle comprises a meter panel including: a regeneration operation indicator that indicates a state where the regeneration operation is necessary or a state where the regeneration operation is being performed, an alert indicator that indicates abnormality of the work vehicle, and a first display device that displays information on the regeneration operation. When the regeneration operation is necessary, the regeneration operation indicator, or the regeneration operation indicator and the alert indicator blink, and the first display device displays information on an operation necessary for performing the regeneration operation. When the regeneration operation is being performed, the regeneration operation indicator, or the regeneration operation indicator and the alert indicator light up, and the first display device displays information on a performing state of the regeneration operation.

A hydraulically driven traveling vehicle comprising a pair of right and left driving axles (driving sprockets) differentially connected to each other by a differential mechanism, the input section of the differential mechanism having the output rotation of traveling HST() transmitted thereto, both driving sprockets having mutually opposite two-flow output rotations separately transmitted thereto from a steering HST (), thereby effecting traveling driving and turning, electromagnetic solenoids () serving as output regulating devices for the traveling HST and the steering HST being provided so that the manipulated variables and directions of a speed change lever and a steering operation tool are converted into electric signals, on the basis of which electric signals the output current values of the electromagnetic solenoids are controlled, causing the respective output rotary speeds of the HSTs to correspond to the output current values.

Growing community of inventors

Osaka, Japan

Toshiyuki Miwa