JP2024094119A - Support device for work vehicle, and work vehicle - Google Patents

Abstract

[Problem] To easily operate multiple functions equipped in a work vehicle [Solution] An assistance device for a work vehicle includes a control device that controls multiple functions related to the work vehicle, and an operating tool for operating a specified function among the multiple functions, the control device has an update unit that updates a function assigned to the operating tool to a different function, and the operating tool has a first indicator lamp that changes its display form depending on the category to which the function updated by the update unit belongs. Also, the first indicator lamp lights up in a different color depending on the category to which the function updated by the update unit belongs.
[Selection diagram] Figure 9

Description

The present invention relates to an assistance device for a work vehicle, and a work vehicle equipped with the assistance device.

The tractor (work vehicle) disclosed in Patent Document 1 has a side panel on the outside of the driver's seat on which a travel speed change lever, a work equipment lifting and lowering operation lever, a setting panel, and an armrest are located. On the setting panel, a tilt setting device that sets the target tilt for automatic tilt control, a lifting height setting device that determines the lifting height of the work equipment, a lowering speed setting device that determines the lowering speed of the work equipment, and switches and indicator lamps that operate various other automatic controls, such as position control (lifting and lowering control), automatic tilt, automatic depth, and draft control.

JP 2018-030502 A

However, if an attempt is made to increase the functions of a work vehicle in order to improve the versatility of the work vehicle, a large number of operating tools will be required to operate the functions, which may worsen the operability of the work vehicle. Furthermore, if a switch is used as an operating tool to change control parameters, as in the invention of Patent Document 1, problems may arise in that space must be secured to install the switch, and the switch may be difficult to distinguish from other switches, resulting in a deterioration in operability.

The present invention was made to solve these problems with the conventional technology, and aims to provide a work vehicle and an assistance device for the work vehicle that can easily operate the multiple functions equipped on the work vehicle.

The work vehicle assistance device according to one aspect of the present invention includes a control device that controls a plurality of functions related to the work vehicle, and an operating tool for operating a predetermined function among the plurality of functions, the control device having an update unit that updates a function assigned to the operating tool to a different function, and the operating tool having a first display lamp that changes its display form depending on the category to which the function updated by the update unit belongs.

The first indicator lamp may be illuminated in a different color depending on the category to which the function updated by the update unit belongs.

The operating tool may be assigned a predetermined initial function from among the plurality of functions, and the update unit may update the function assigned to the operating tool to an updated function from among the plurality of functions that is different from the initial function, and the first display lamp may change its display form depending on the category to which the updated function updated by the update unit belongs.

The operating tool may be provided with an icon indicating the initial function.

The operating tool may have a second indicator lamp in addition to the first indicator lamp, and the second indicator lamp may change its display mode depending on whether the function assigned to the operating tool is active or inactive.

The first and second indicator lamps may be positioned so as to surround the icon.

The operating tool has a third lamp that is turned on in addition to the first and second indicator lamps, and the first, second, and third indicator lamps are formed in a shape that follows the inner periphery of the operating surface of the operating tool, and each may form a part or all of the outline of the inner periphery of the operating surface.

The work vehicle includes a vehicle body, a driver's seat provided in the vehicle body, and an assistance device, and the operating tool is provided near the driver's seat.

The above-mentioned work vehicle support device and work vehicle allow the user to easily operate multiple functions provided on the work vehicle.

FIG. 1 is a side view of a work vehicle equipped with a front loader. FIG. 2 is a diagram illustrating a system of a work vehicle. FIG. FIG. 2 is a diagram showing a display device provided in a meter panel. FIG. 2 is a plan view showing the arrangement of armrests and the like around the driver's seat. FIG. 1 is a perspective view of the grip portion of the operating lever and its vicinity as viewed from the upper left rear. FIG. 4 is a perspective view of the first dial and the second dial as viewed from the upper left rear. FIG. FIG. 13 illustrates an example of a standard table. FIG. 13 illustrates an example of an extension table. 1 is a perspective view of the grip portion of the operating lever and its surroundings as viewed from the upper right front. FIG. 11 is a perspective view of the vicinity of a grip of an operating lever in a modified example, as viewed from the upper right front. 5A and 5B are diagrams illustrating an example of an operation display screen and an information display screen. FIG. 13 is a diagram showing an example of a first change screen. FIG. 13 is a diagram illustrating an example of an operation table. FIG. 11 is a diagram showing an example of a second change screen. 13A and 13B are diagrams illustrating an example of a third change screen and an information display screen. 13A and 13B are diagrams illustrating an example of a fourth change screen and an information display screen. FIG. 13 is a diagram showing an example of a fifth change screen. FIG. 11 is a view of an operating lever in a modified example as seen from the driver's seat. FIG. 13 is a diagram illustrating a system of a work vehicle according to a modified example.

The following describes an embodiment of the present invention with reference to the drawings.

Figure 1 is a side view of the work vehicle 1. The work vehicle 1 is a vehicle for performing agricultural work, and in this embodiment, is a tractor. In the following, the work vehicle 1 is described as being a tractor. However, the work vehicle 1 is not limited to a tractor, and may be an agricultural machine (agricultural vehicle) such as a combine harvester or transplanter, or a construction machine (construction vehicle) such as a loader work machine.

In the following explanation, the direction in which the worker seated in the driver's seat 4 of the work vehicle 1 faces (the direction of arrow A1 in Figures 1, 3, etc.) is referred to as the forward direction, and the opposite direction (the direction of arrow A2 in Figures 1, 3, etc.) is referred to as the rear direction. Additionally, the left side of the worker (the front side in Figure 1, the direction of arrow B1 in Figure 2, etc.) is referred to as the left side, and the right side of the worker (the rear side in Figure 1, the direction of arrow B2 in Figure 3, etc.) is referred to as the right side. Additionally, the horizontal direction perpendicular to the fore-and-aft direction is referred to as the vehicle body width direction (see Figures 3, 4, etc.).

As shown in FIG. 1, the work vehicle 1 includes a vehicle body 2, a transmission 20, and a coupling portion 30.

The vehicle body 2 has a running device 3 and is capable of running. The vehicle body 2 is also equipped with a driver's seat 4 and a cabin 5 surrounding the driver's seat 4. The running device 3 is a device that has front wheels 3F and rear wheels 3R. The front wheels 3F may be of either a tire type or a crawler type. The rear wheels 3R may also be of either a tire type or a crawler type.

The vehicle body 2 is provided with a prime mover 6. The prime mover 6 may be a diesel engine, an electric motor, or the like, and in this embodiment is configured as a diesel engine.

The transmission 20 can change the propulsive force of the traveling device 3 by changing the speed, and can also switch the traveling device 3 between forward and reverse. Figure 2 is a diagram explaining the system of the work vehicle 1. As shown in Figure 2, the transmission 20 is equipped with a main shaft (propulsion shaft) 20a, a main speed change section 20b, a sub-speed change section 20c, a shuttle section 20d, a PTO power transmission section 20e, and a front speed change section 20f. The propulsion shaft 20a transmits power from the crankshaft of the prime mover 6. The main speed change section 20b has multiple gears and a shifter that changes the connection of the gears, and changes and outputs the rotation input from the propulsion shaft 20a (shifts the speed).

The sub-transmission unit 20c, like the main transmission unit 20b, has multiple gears and a shifter that changes the connections of those gears, and changes and outputs (shifts) the rotation input from the main transmission unit 20b.

The shuttle section 20d can switch the direction of rotation of the power output from the sub-transmission section 20c by switching the power transmission with the hydraulic clutch, i.e., switch between forward and reverse motion of the traveling device 3. The shuttle section 20d is connected to the rear wheel differential device 21R, which supports the rear wheel 3R so that it can rotate freely. The hydraulic clutch of the shuttle section 20d can cut off the transmission of power by switching it to the neutral position.

The PTO power transmission unit 20e switches between a state in which the power of the propeller shaft 20a is transmitted to the PTO shaft 22 and a state in which the power of the propeller shaft 20a is not transmitted to the PTO shaft 22 by engaging and disengaging the hydraulic clutch.

The front transmission unit 20f has a first clutch 20f1 and a second clutch 20f2, which are hydraulic clutches, and can transmit power from the drive shaft 20a. For example, the power of the shuttle unit 20d is transmitted via a gear and a transmission shaft. The power from the first clutch 20f1 and the second clutch 20f2 is transmitted to a front wheel differential device 21F, which supports the front wheels 3F so that they can rotate freely.

When the first clutch 20f1 is disengaged and the second clutch 20f2 is engaged, the power of the shuttle section 20d is transmitted to the front wheels 3F through the second clutch 20f2. This results in a four-wheel drive (4WD) in which the front wheels 3F and rear wheels 3R are driven by power, and the rotational speeds of the front wheels 3F and rear wheels 3R are approximately the same (4WD constant speed state).

On the other hand, when the first clutch 20f1 is engaged and the second clutch 20f2 is disengaged, the power of the shuttle section 20d is transmitted to the front wheels 3F through the first clutch 20f1. At this time, the vehicle is in four-wheel drive and the rotational speed of the front wheels 3F is faster than the rotational speed of the rear wheels 3R (4WD acceleration state).

When the first clutch 20f1 and the second clutch 20f2 are in a disconnected state, the power of the shuttle section 20d is not transmitted to the front wheels 3F, so the rear wheels 3R are driven by the power, resulting in two-wheel drive (2WD).

The hydraulic clutches of the transmission 20 are each connected to an oil passage, which is connected to a control valve (not shown) to which hydraulic oil discharged from a hydraulic pump (not shown) is supplied. The hydraulic pump discharges hydraulic oil using the driving force generated by the prime mover 6. The control valve is, for example, a two-position switching valve with a solenoid valve, and is switched between a connected state and a disconnected state by exciting or demagnetizing the solenoid of the solenoid valve using a control signal output from the control device 80 described below.

The above-mentioned transmission 20 employs a gear system that changes gears by changing the connections of multiple gears, but the transmission 20 may also employ a belt-type continuously variable transmission (CVT: Continuously Variable Transmission) or the like, and the configuration is not limited to the gear system.

In addition, a suspension mechanism 23 is provided at the front of the vehicle body 2 to cushion shocks and vibrations from the field, road surface, etc., and to adjust the height and tilt the front of the work vehicle 1. The suspension mechanism 23 constitutes a suspension device together with a front axle case (not shown) that houses the front wheel differential device 21F and the vehicle body 2. The suspension mechanism 23 has a pair of suspension cylinders 23a provided in the vehicle body width direction.

The pair of suspension cylinders 23a can be expanded and contracted by supplying hydraulic oil. In more detail, the pair of suspension cylinders 23a can be expanded simultaneously to move the front axle case downward, thereby relatively raising the front part of the vehicle body 2. On the other hand, the pair of suspension cylinders 23a can be contracted simultaneously to move the front axle case upward, thereby relatively lowering the front part of the vehicle body 2.

The suspension cylinder 23a is connected to a hydraulic pump via a control valve (not shown). The control valve is, for example, a two-position switching valve with a solenoid valve, and the suspension cylinder 23a is extended or retracted by exciting or demagnetizing the solenoid of the solenoid valve using a control signal output from the control device 80 described below.

The coupling section 30 is provided at the rear of the vehicle body 2. The coupling section 30 is a section for coupling a work implement (ground work machine) 10, which performs work on a field (farmland) or the like, to the rear of the work vehicle 1. The work implement 10 is driven by a driving force transmitted from, for example, the PTO shaft 22. The work implement 10 may also have a hydraulic attachment 10a, which may be driven by hydraulic oil. Specifically, the work implement 10 may be a tiller, a spreader, a seed sower, or the like, but is not limited to these.

Figure 3 is a perspective view of the connecting portion 30. The connecting portion 30 is a lifting device 30 that is driven by an actuator such as a hydraulic cylinder to raise or lower the working device 10 (hereinafter, also referred to as the "lifting device 30"). In this embodiment, the lifting device 30 is a three-point link mechanism.

As shown in FIG. 3, the lifting device 30 has a lift arm 30a, a lower link 30b, a top link 30c, a lift rod 30d, and a lift cylinder 30e. The front end of the lift arm 30a is supported on the rear upper part of the transmission 20 so that it can swing upward or downward. The lift arm 30a swings (lifts and lowers) by driving the lift cylinder 30e. The lift cylinder 30e is composed of a hydraulic cylinder. The lift cylinder 30e is connected to a hydraulic pump via a control valve (not shown). The control valve is, for example, a two-position switching valve with a solenoid valve, and the lift cylinder 30e is extended or retracted by exciting or demagnetizing the solenoid of the solenoid valve according to a control signal output from the control device 80 described below.

The front end of the lower link 30b is supported on the rear lower part of the transmission 20 so that it can swing upward or downward. The front end of the top link 30c is supported on the rear part of the transmission 20 above the lower link 30b so that it can swing upward or downward. The lift rod 30d connects the lift arm 30a and the lower link 30b. The working device 10 is connected to the rear of the lower link 30b and the rear of the top link 30c.

When the lift cylinder 30e is driven (extends and retracts), the lift arm 30a rises and lowers, and the lower link 30b connected to the lift arm 30a via the lift rod 30d rises and lowers. This causes the working device 10 to swing (rise and fall) upward or downward, with the front part of the lower link 30b as a fulcrum.

A horizontal control device (Monroe) 31 for maintaining the working device 10 horizontal may be provided at the rear of the vehicle body 2. The horizontal control device 31 is a device for changing the posture of the working device 10 attached to the vehicle body 2. The horizontal control device 31 has a change cylinder 31a, which connects the lift arm 30a and the lower link 30b in place of one of the pair of lift rods 30d. The change cylinder 31a is composed of a hydraulic cylinder. The change cylinder 31a is connected to a hydraulic pump via a control valve (not shown). The control valve is an electromagnetic valve or the like, and expands and contracts the change cylinder 31a. The change cylinder 31a is connected to a hydraulic pump via a control valve. The control valve is, for example, a two-position switching valve with an electromagnetic valve, and the lift cylinder 30e is expanded and contracted by exciting or demagnetizing the solenoid of the electromagnetic valve according to a control signal output from the control device 80 described later.

As shown in FIG. 2, the work vehicle 1 has multiple auxiliary valves 32. The multiple auxiliary valves 32 are two-position switching valves with solenoid valves connected to a hydraulic pump. The multiple auxiliary valves 32 have output ports, and hydraulic hoses, etc. can be connected to any of the output ports. A hydraulic hose connected to any of the output ports of the auxiliary valves 32 is connected to a hydraulic attachment 10a of the work device 10, and the auxiliary valves 32 operate various hydraulic attachments 10a attached to the work device 10 by exciting or demagnetizing the solenoid of the solenoid valve according to a control signal output from the control device 80 described below.

In this embodiment, the multiple auxiliary valves 32 are disposed above the lifting device 30 in the vehicle body 2. In this embodiment, the number of multiple auxiliary valves 32 is four. Hereinafter, the multiple auxiliary valves 32 provided on the work vehicle 1 may be referred to as the first auxiliary valve 32a, the second auxiliary valve 32b, the third auxiliary valve 32c, and the fourth auxiliary valve 32d, respectively.

As shown in FIG. 1, a front loader 35 is attached to the front of the vehicle body 2. The front loader 35 has a mounting frame 35a, a boom 35b, a working tool (bucket) 35c, a boom cylinder 35d, and a bucket cylinder 35e. The front loader 35 is not limited to this embodiment as long as it has the boom 35b and the working tool 35c. Furthermore, the working tool 35c is not limited to a bucket, and may be other types of working tools such as a pallet fork, a sweeper, a mower, or a snow blower.

As shown in FIG. 1, the mounting frames 35a are detachably attached to the left and right sides of the vehicle body 2. The front loader 35 is attached to the vehicle body 2 via the mounting frames 35a.

The boom 35b is mounted on the vehicle body 2 so that it can swing up and down. The boom 35b is connected and supported so that it can swing around a pivot 36 provided on the mounting frame 35a.

The bucket 35c is attached to the front of the boom 35b. The bucket 35c is used primarily to scoop up and push forward soil and sand from the work area in front of the vehicle body 2, and is connected and supported by a connecting bracket 35c1 at the rear of the bucket 35c so that it can swing around a pivot 37 at the front end of the boom 35b.

The boom cylinder 35d and the bucket cylinder 35e are each connected to a hydraulic pump via a control valve (not shown). The control valve is, for example, a two-position switching valve with a solenoid valve, and the boom cylinder 35d and the bucket cylinder 35e are each extended and retracted by energizing or deenergizing the solenoid of the solenoid valve using a control signal output from the control device 80 described below.

The boom cylinders 35d are provided on the underside of the booms 35b, respectively, and connect the mounting frame 35a and the booms 35b. One end of the boom cylinders 35d is pivotally supported on the mounting frame 35a. The other end of the boom cylinders 35d is pivotally supported on the middle part of the booms 35b in the fore-and-aft direction.

The boom cylinder 35d is a hydraulic cylinder that swings the boom 35b upward around the pivot 36 when it extends, and swings the boom 35b downward around the pivot 36 when it retracts.

The bucket cylinders 35e are provided on the upper surface of the boom 35b, respectively, and connect the bucket 35c and the boom 35b. One end of the bucket cylinder 35e is pivotally supported on the connecting bracket 35c1 at the rear of the bucket 35c. The other end of the bucket cylinder 35e is pivotally supported on the middle part of the boom 35b in the fore-and-aft direction.

The bucket cylinder 35e is a hydraulic cylinder that, when extended, swings the bucket 35c downward around the pivot 37 (dumping operation), and, when contracted, swings the bucket 35c upward around the pivot 37 (scooping operation).

Note that while FIG. 1 shows a front loader 35 attached to the front of the vehicle body 2, depending on the functions of the work vehicle 1, the front loader 35 may not be attached to the work vehicle 1.

As shown in FIG. 1, a steering wheel 11 is provided in front of the driver's seat 4. The steering wheel 11 is rotatably supported by a steering shaft. The steering wheel 11 is provided on top of a control console 12 located inside the cabin 5.

As shown in FIG. 2, the work vehicle 1 is equipped with an operating device 40, a detection device 70, a control device 80, and a display device 90. In the following description, the configuration including the operating device 40, the control device 80, and the display device 90 (in this embodiment, the configuration including the storage device 81 described below) may be referred to as the support device 100 of the work vehicle 1. In addition, an in-vehicle network N such as CAN, LIN, or FlexRay is constructed in the work vehicle 1. The devices mounted on the work vehicle 1, including the operating device 40, the detection device 70, the control device 80, and the display device 90, are electrically connected via the in-vehicle network N.

The operating device 40 is provided around the driver's seat 4 and is a device for operating various functions of the work vehicle 1. The operating device 40 is a device for operating, for example, driving functions related to driving and work functions related to work among the various functions of the work vehicle 1. The operating device 40 accepts operation instructions when operated and outputs an operation signal based on the operation.

The detection device 70 is a device that detects the state of the work vehicle 1 and outputs a detection signal. The detection device 70 includes, for example, a prime mover rotation sensor (rotation sensor) 70a, an accelerator pedal sensor 70b, a brake pedal sensor 70c, a steering angle sensor 70d, a first angle sensor 70e, a second angle sensor 70f, a third angle sensor 70g, and a vehicle speed sensor 70h.

The prime mover rotation sensor 70a detects the rotation speed of the prime mover 6, and the accelerator pedal sensor 70b detects the amount of accelerator pedal operation. The brake pedal sensor 70c detects the operation of the brake pedal, and the steering angle sensor 70d detects the steering angle of the steering wheel 11. The first angle sensor 70e detects the angle of the lift arm 30a, and the second angle sensor 70f detects the angle of the boom 35b. The third angle sensor 70g detects the angle of the bucket 35c, and the vehicle speed sensor 70h detects the vehicle speed.

Note that the detection device 70 described above is an example, and is not limited to only the above-mentioned sensors, and may be added, removed, or modified as appropriate depending on the functions of the work vehicle 1.

The control device 80 is a device that is composed of electric and electronic circuits, a CPU, programs stored in memory, etc., and controls various devices connected to the on-board network N of the work vehicle 1. In addition, a storage device 81 such as an SSD (solid state drive) or HDD (hard disk drive) is connected to the control device 80, and the control device 80 executes predetermined control based on the programs stored in the storage device 81.

More specifically, the control device 80 controls the driving and working functions of the work vehicle 1 based on the operation signal output from the operation device 40 and the detection signal from the detection device 70. For example, the control device 80 executes control related to the shifting (increasing or changing speed) of the transmission 20 based on the operation signal output from the operation device 40, control related to the lifting and lowering of the lifting device 30 based on the operation signal output from the operation device 40, control related to the operation of the front loader 35, control of the rotation speed of the prime mover 6 based on the detection signal from the accelerator pedal sensor 70b, etc.

The display device 90 is a device capable of displaying various information. The display device 90 has any of a liquid crystal panel, a touch panel, and other panels. For example, the display device 90 is a first display device (monitor) 90A provided in a meter panel 15 provided in front of the driver's seat 4. FIG. 4 is a diagram showing the first display device 90A provided in the meter panel 15. The meter panel 15 is disposed above the column cover of the steering console 12 and in front of the steering wheel 11. The meter panel 15 is provided with an engine tachometer 15a that displays the rotation speed of the prime mover 6, a water temperature gauge 15b, a fuel gauge 15c, and the first display device 90A. In the illustrated example, the engine tachometer 15a is disposed to the left of the first display device 90A, and the water temperature gauge 15b and the fuel gauge 15c are disposed to the right of the first display device 90A, but the arrangement may be changed. The first display device 90A is connected to the control device 80, etc. via the in-vehicle network N. The first display device 90A is capable of acquiring various information from devices such as the control device 80 and the detection device 70 connected to the in-vehicle network N and displaying that information.

The display device 90 is not limited to the first display device 90A provided in the meter panel 15 as described above, as long as it can display information. In other words, the display device 90 may be a second display device (terminal display device) 90B provided around the worker who is on board the work vehicle 1, or a mobile terminal carried by the worker who is on board and operates the work vehicle 1. The mobile terminal is composed of a PC or a smartphone (multi-function mobile phone) with relatively high computing power. In such a case, the mobile terminal has a device that communicates either directly or indirectly with the in-vehicle network N, and is capable of acquiring various information from devices connected to the in-vehicle network N via the device and displaying the information.

The control device 80 can control (execute) multiple functions related to the work vehicle 1. Based on the operation signal output from the operation device 40 and/or the detection signal output from the detection device 70, the control device 80 controls the equipment equipped in the work vehicle 1 to execute various types of functions. The multiple functions related to the work vehicle 1 can be classified into related categories according to predetermined conditions. In this embodiment, the multiple functions can be classified into first to ninth categories. Note that the control programs and control parameters required to execute the multiple functions are stored in the storage device 81.

The first category is a classification related to shifting the gears of the transmission 20. The functions that control the transmission 20 are classified into the first category. The control device 80 can control the first to eighth driving functions as functions classified into the first category. The first function changes the gears of the transmission 20 by controlling the shifter of the main transmission unit 20b and/or the shifter of the sub transmission unit 20c based on the vehicle speed detected by the vehicle speed sensor 70h and a predefined control map.

The second function is a function to change the control object of the first function (the shifter of the main transmission unit 20b and/or the shifter of the sub transmission unit 20c) and the control map to be referenced. As the second function, the control device 80 changes the control object of the first function, for example, and switches between a mode in which the shifter of the main transmission unit 20b and the shifter of the sub transmission unit 20c are controlled in the first function, and a mode in which the shifter of the main transmission unit 20b is controlled in the first function. In addition, the storage device 81 stores multiple control maps, and the control device 80, as the second function, appropriately selects a control map to be referenced in the first function.

The third function is a function of changing the control map of the first function based on the operation of the operator. As the third function, the control device 80 changes the control map of the first function based on the operation signal output from the operation device 40, and changes the vehicle speed conditions for changing the gear stage of the transmission 20.

The fourth function is to control the shifter of the main transmission unit 20b and/or the shifter of the sub-transmission unit 20c based on the operation of the operator to increase the gear stage of the transmission 20. As the fourth function, the control device 80 controls the shifter of the main transmission unit 20b and/or the shifter of the sub-transmission unit 20c based on the operation signal output from the operation device 40 to increase the gear stage.

The fifth function is to control the shifter of the main transmission unit 20b and/or the shifter of the sub-transmission unit 20c based on the operation of the operator to lower the gear stage of the transmission 20. As the fifth function, the control device 80 controls the shifter of the main transmission unit 20b and/or the shifter of the sub-transmission unit 20c based on the operation signal output from the operation device 40 to lower the gear stage.

The sixth function is to change the switching speed of the rotation direction of the power output from the sub-transmission unit 20c based on the operation of the operator. As the sixth function, the control device 80 changes the switching speed of the hydraulic clutch of the shuttle unit 20d based on the operation signal output from the operation device 40, in other words, changes the sensitivity of the forward and reverse switching of the traveling device 3.

The seventh function is to switch the hydraulic clutch of the shuttle unit 20d to the neutral position and cut off the transmission of power to the traveling device 3 when the brake pedal is operated and the vehicle speed falls below a predetermined value. The control device 80 determines whether the brake pedal is operated and the vehicle speed falls below a predetermined value based on the brake pedal operation detected by the brake pedal sensor 70c and the vehicle speed detected by the vehicle speed sensor 70h, and controls the seventh function.

The eighth function is to change the control of the transmission 20 based on the load on the prime mover 6. As the eighth function, the control device 80 detects the load on the prime mover 6 based on the rotation speed of the prime mover 6 detected by the prime mover rotation sensor 70a, and when the load is large, the switching speed of the hydraulic clutch of the shuttle section 20d is made faster compared to when the load is small.

Note that, although functions related to the transmission 20 have been described as functions classified in the first category, functions employed in the work vehicle 1 may be added, deleted, or changed depending on the type of transmission 20, etc. For example, if the transmission 20 is a continuously variable transmission, functions classified in the first category may include a function (cruise control) in which the control device 80 controls the vehicle speed to a constant value, a function for changing the vehicle speed of the cruise control, a function for switching to a mode that limits the vehicle speed (driving mode), etc. In such a case, a function for changing the vehicle speed in the cruise control function may be adopted.

The second category is a classification related to the power transmitted to the main transmission section 20b of the transmission 20. The second category is classified as a function that controls the prime mover 6 and/or the shuttle section 20d. The control device 80 can control the ninth to sixteenth functions, which are driving functions, as functions classified in the second category. The ninth function is a function that controls the rotation speed of the prime mover 6 to a predefined first prime mover rotation speed regardless of the operation of the accelerator pedal. The value of the first prime mover rotation speed is prestored in the memory device 81.

The tenth function is to change the first motor rotation speed based on the operation of the operator. As the tenth function, the control device 80 changes the value of the first motor rotation speed stored in the storage device 81 based on the operation signal output from the operating device 40.

The eleventh function is a function for controlling the rotation speed of the prime mover 6 to a predefined second prime mover rotation speed regardless of the operation of the accelerator pedal. The value of the second prime mover rotation speed is a rotation speed different from the first prime mover rotation speed and is prestored in the memory device 81.

The twelfth function is a function of changing the second prime mover rotation speed based on the operation of the operator. As the twelfth function, the control device 80 changes the value of the second prime mover rotation speed stored in the storage device 81 based on the operation signal output from the operating device 40.

The thirteenth function is to control the rotation speed of the prime mover 6 based on the vehicle speed and the load on the prime mover 6. As the thirteenth function, the control device 80 increases the rotation speed of the prime mover 6 based on the vehicle speed detected by the vehicle speed sensor 70h and the load on the prime mover 6 based on the rotation speed of the prime mover 6 detected by the prime mover rotation sensor 70a when the vehicle speed is constant and the load on the prime mover 6 is equal to or greater than a predetermined value.

The fourteenth function is to control the shuttle unit 20d based on the operation of the operator and cut off the power transmitted from the shuttle unit 20d. As the fourteenth function, the control device 80 switches the hydraulic clutch of the shuttle unit 20d to the neutral position based on the operation signal output from the operating device 40.

The fifteenth function is to control the shuttle unit 20d based on the operation of the operator, and to switch the rotation direction of the power output from the sub-transmission unit 20c to forward. As the fifteenth function, the control device 80 controls the hydraulic clutch of the shuttle unit 20d based on the operation signal output from the operating device 40, and switches the rotation direction of the power output from the sub-transmission unit 20c to forward.

The 16th function is to control the shuttle unit 20d based on the operation of the operator, and to switch the rotation direction of the power output from the sub-transmission unit 20c to reverse. As the 16th function, the control device 80 controls the hydraulic clutch of the shuttle unit 20d based on the operation signal output from the operating device 40, and switches the rotation direction of the power output from the sub-transmission unit 20c to reverse.

Note that, as functions classified in the second category, functions related to the power transmitted to the main transmission section 20b of the transmission 20 have been described, but the above-mentioned functions are merely examples, and functions classified in the second category may also include a function for changing the upper limit of the rotation speed of the prime mover 6 controlled by the control device 80.

The third category is a classification related to the drivability of the work vehicle 1. The third category includes functions that control at least one of the front shift unit 20f, the rear wheel differential device 21R, and the suspension mechanism 23. The control device 80 can control the 17th to 23rd functions, which are driving functions, as functions classified in the third category. The 17th function is a function that controls the front shift unit 20f based on the operation of the operator to switch to a 4WD constant speed state. As the 17th function, the control device 80 switches the first clutch 20f1 to a disconnected state and the second clutch 20f2 to a connected state (4WD constant speed state) based on an operation signal output from the operation device 40.

The 18th function is to control the front shifting unit 20f based on the vehicle speed and the steering angle of the steering device to switch between 2WD and 4WD constant speed state. As the 18th function, the control device 80 switches the first clutch 20f1 to a disconnected state and the second clutch 20f2 to a connected state (4WD constant speed state) when the vehicle speed is less than a predetermined value and the steering angle is less than a predetermined value based on the vehicle speed detected by the vehicle speed sensor 70h and the steering angle detected by the steering angle sensor 70d. On the other hand, as the 14th function, the control device 80 switches the first clutch 20f1 and the second clutch 20f2 of the front shifting unit 20f to a disconnected state (2WD) when the vehicle speed is equal to or greater than a predetermined value or the steering angle is equal to or greater than a predetermined value.

The 19th function is to control the front shift unit 20f based on the operation of the operator to switch to the 4WD acceleration state. As the 19th function, the control device 80 switches the first clutch 20f1 to the connected state and the second clutch 20f2 to the disconnected state (4WD acceleration state) based on the operation signal output from the operation device 40.

The 20th function is to fix (directly connect) the rear wheel differential device 21R based on the operation of the operator. As the 20th function, the control device 80 controls the rear wheel differential device 21R based on the operation signal output from the operation device 40 to perform differential lock.

The 21st function is to contract the suspension cylinder 23a based on the operation of the operator, thereby relatively lowering the front of the vehicle body 2. As the 21st function, the control device 80 controls the control valve based on the operation signal output from the operation device 40, contracting the suspension cylinder 23a and lowering the front of the vehicle body 2. Note that in the 21st function, when the vehicle speed detected by the vehicle speed sensor 70h is equal to or higher than a predetermined value, the control device 80 controls the control valve to return the suspension cylinder 23a to a predetermined initial length, thereby returning the height of the front of the vehicle body 2 to a predetermined initial position.

The 22nd function is to extend the suspension cylinder 23a based on the operation of the operator, thereby relatively raising the front of the vehicle body 2. As the 22nd function, the control device 80 controls the control valve based on the operation signal output from the operation device 40, and extends the suspension cylinder 23a to raise the front of the vehicle body 2. Note that in the 22nd function, when the vehicle speed detected by the vehicle speed sensor 70h is equal to or higher than a predetermined value, the control device 80 controls the control valve to return the suspension cylinder 23a to a predetermined initial length, thereby returning the height of the front of the vehicle body 2 to a predetermined initial position.

The 23rd function is a function that contracts the suspension cylinder 23a to the maximum when the vehicle speed is less than a predetermined value. When the vehicle speed detected by the vehicle speed sensor 70h is less than a predetermined value, the control device 80 controls the control valve as the 23rd function to contract the suspension to the stroke end and lower the front of the vehicle body 2. On the other hand, when the vehicle speed detected by the vehicle speed sensor 70h is equal to or greater than a predetermined value, the control device 80 controls the control valve as the 23rd function to return the suspension cylinder 23a to a predetermined initial length, thereby returning the height of the front of the vehicle body 2 to a predetermined initial position.

Note that, although functions related to the drivability of the work vehicle 1 have been described as functions classified in the third category, the above-mentioned functions are merely examples, and functions classified in the third category may also include an auto-diff-lock function, a function for controlling the vehicle speed according to the slip ratio, a function for changing the control map for the function (a function for changing the slip sensitivity), etc.

The fourth category is a classification related to the rotation of the PTO shaft 22. The fourth category includes functions that control the PTO power transmission unit 20e. The control device 80 can control the 24th function, which is a work function, as a function classified in the fourth category. The 24th function is a function that controls the PTO power transmission unit 20e and switches the power transmission to the PTO shaft 22 depending on the height of the work device 10. As the 24th function, the control device 80 calculates the height of the work device 10 from the detection signal detected by the first angle sensor 70e, and when the height of the work device 10 is less than a predetermined value, controls the hydraulic clutch of the PTO power transmission unit 20e to switch to a state in which the power of the propeller shaft 20a is transmitted to the PTO shaft 22. On the other hand, as a 24th function, the control device 80 calculates the height of the working device 10 from the detection signal detected by the first angle sensor 70e, and if the height of the working device 10 is equal to or greater than a predetermined value, controls the hydraulic clutch of the PTO power transmission unit 20e to switch to a state in which the power of the drive shaft 20a is not transmitted to the PTO shaft 22.

Note that, although functions related to the rotation of the PTO shaft 22 have been described as functions classified in the fourth category, the above-mentioned functions are merely examples, and other functions classified in the fourth category may also be functions in which the control device 80 controls the PTO power transmission unit 20e in response to the operation of the operator to switch the power transmission to the PTO shaft 22.

The fifth category is a classification related to the lifting device 30. The fifth category is classified as a function that controls the lift cylinder 30e and/or the change cylinder 31a. The control device 80 can control the 25th to 31st functions, which are work functions, as functions classified in the fifth category. The 25th function is a function that extends the lift cylinder 30e based on the operation of the worker, and raises the work device 10 connected to the lifting device 30. As the 25th function, the control device 80 controls the control valve based on the operation signal output from the operation device 40, and extends the lift cylinder 30e to raise the work device 10.

The 26th function is to contract the lift cylinder 30e based on the operation of the worker, and to lower the working device 10 connected to the lifting device 30. As the 26th function, the control device 80 controls the control valve based on the operation signal output from the operating device 40, and contracts the lift cylinder 30e to lower the working device 10.

The 27th function is a function to change the upper limit of the height of the working device 10 connected to the lifting device 30 based on the operation of the worker. As the 27th function, the control device 80 changes the upper limit of the height of the working device 10 stored in the memory device 81 based on the operation signal output from the operation device 40. The control device 80 calculates the height of the working device 10 from the detection signal detected by the first angle sensor 70e, and restricts the detected height of the working device 10 so as not to exceed the upper limit of the height of the working device 10 stored in the memory device 81.

The 28th function is a function to change the lower limit value of the height of the working device 10 connected to the lifting device 30 based on the operation of the worker. As the 28th function, the control device 80 changes the lower limit value of the height of the working device 10 stored in the memory device 81 based on the operation signal output from the operation device 40. The control device 80 calculates the height of the working device 10 from the detection signal detected by the first angle sensor 70e, and restricts the detected height of the working device 10 so that it does not fall below the lower limit value of the height of the working device 10 stored in the memory device 81.

The 29th function is to contract the change cylinder 31a based on the operation of the worker, thereby changing the posture of the working device 10 connected to the lifting device 30. As the 29th function, the control device 80 controls the control valve based on the operation signal output from the operation device 40, contracting the change cylinder 31a, raising the other side (right side) of the working device 10 in the width direction, and lowering one side (left side) of the working device 10 in the width direction.

The 30th function is to extend the change cylinder 31a based on the operation of the worker, thereby changing the posture of the working device 10 connected to the lifting device 30. As the 30th function, the control device 80 controls the control valve based on the operation signal output from the operating device 40, and extends the change cylinder 31a to lower the other side (right side) of the working device 10 in the width direction and raise one side (left side) of the working device 10 in the width direction.

The 31st function is to return the change cylinder 31a to a predetermined initial length based on the operation of the worker, and to return the posture of the working device 10 connected to the lifting device 30 to a predetermined initial state. As the 31st function, the control device 80 controls the control valve based on the operation signal output from the operation device 40, and returns the change cylinder 31a to the predetermined initial length, making the posture of the working device 10 parallel to the vehicle body 2.

Note that, although functions related to the lifting device 30 have been described as functions classified in the fifth category, the above-mentioned functions are merely examples, and other functions classified in the fifth category may include a function in which the control device 80 controls the change cylinder 31a to change the angle of the attitude of the working device 10 relative to the vehicle body 2, a function in which the control device 80 controls the control valve to change the speed at which the lift cylinder 30e contracts, i.e., the speed at which the working device 10 descends, and a function to limit (lock) the drive and natural fall of the lifting device 30.

The sixth category is a classification related to the work device 10 having the hydraulic attachment 10a. The sixth category is a classification of functions for controlling the work device 10. The control device 80 can control the thirty-second to thirty-third functions, which are work functions, as functions classified in the sixth category. The thirty-second function is a function for adjusting the flow rate of hydraulic oil supplied to the hydraulic attachment 10a based on the operation of the operator. As the thirty-second function, the control device 80 controls a predetermined auxiliary valve 32 (any of the first auxiliary valve 32a, the second auxiliary valve 32b, the third auxiliary valve 32c, and the fourth auxiliary valve 32d) of the multiple auxiliary valves 32 based on an operation signal output from the operating device 40, thereby increasing the flow rate of hydraulic oil supplied to the hydraulic attachment 10a and increasing the flow rate of the hydraulic oil.

The 33rd function is to adjust the flow rate of hydraulic oil supplied to the hydraulic attachment 10a based on the operation of the operator. As the 33rd function, the control device 80 controls a predetermined auxiliary valve 32 (any of the first auxiliary valve 32a, the second auxiliary valve 32b, the third auxiliary valve 32c, and the fourth auxiliary valve 32d) among the multiple auxiliary valves 32 based on the operation signal output from the operating device 40, thereby reducing the flow rate of the hydraulic oil supplied to the hydraulic attachment 10a and slowing the flow rate of the hydraulic oil.

Note that, although the function of controlling the work device 10 having the hydraulic attachment 10a has been described as a function classified in the sixth category, the above-mentioned function is merely an example, and a function in which the control device 80 controls the auxiliary valve 32 to change the speed, etc., may also be adopted as a function classified in the sixth category.

The seventh category is a classification related to the front loader 35. The seventh category is classified as a function that controls the boom cylinder 35d and/or the bucket cylinder 35e. The control device 80 can control the 34th to 41st functions, which are work functions, as functions classified in the seventh category. The 34th function is a function that extends the boom cylinder 35d based on the operation of the worker, and swings the boom 35b upward. As the 34th function, the control device 80 controls a control valve based on an operation signal output from the operation device 40, and extends the boom cylinder 35d to swing the boom 35b upward.

The 35th function is to contract the boom cylinder 35d based on the operation of the operator, and swing the boom 35b downward. As the 35th function, the control device 80 controls the control valve based on the operation signal output from the operation device 40, and contracts the boom cylinder 35d, and swings the boom 35b downward.

The 36th function is to contract the bucket cylinder 35e based on the operation of the worker, and swing the bucket 35c upward (scooping operation). As the 36th function, the control device 80 controls the control valve based on the operation signal output from the operating device 40, and contracts the bucket cylinder 35e to perform the scooping operation.

The 37th function is to extend the bucket cylinder 35e based on the operation of the worker, and swing the bucket 35c downward (dump operation). As the 37th function, the control device 80 controls the control valve based on the operation signal output from the operating device 40, and extends the bucket cylinder 35e to perform the dump operation.

The 38th function is to remove the load from the bucket 35c by swinging the bucket 35c. As the 38th function, the control device 80 controls the control valves connected to the boom cylinder 35d and the bucket cylinder 35e, respectively, and swings the bucket 35c multiple times while pointing the bucket 35c downward.

The 39th function is a function of calculating the mass of the load on the bucket 35c. As the 39th function, the control device 80 calculates the mass of the load based on the pressure of the hydraulic oil flowing through the oil passage connected to the boom cylinder 35d and the bucket cylinder 35e, the angle of the boom 35b, etc., and displays the mass on the display device 90. Note that the control device 80 only needs to be able to calculate the mass of the load as the 39th function, and the calculation method is not limited to the above-mentioned method.

The 40th function is to change the operating speed of the front loader 35 based on the operation of the operator. As the 40th function, the control device 80 adjusts the opening of the control valve of the boom cylinder 35d and the control valve of the bucket cylinder 35e when operating the front loader 35 based on the operation signal output from the operating device 40, and changes the flow rate of hydraulic oil supplied to the boom cylinder 35d and the bucket cylinder 35e.

The 41st function is to move the operating position of the front loader 35 (bucket 35c) to a predetermined position. As the 41st function, the control device 80 controls the control valve of the boom cylinder 35d and the control valve of the bucket cylinder 35e based on the position information stored in the storage device 81, the angle of the boom 35b detected by the second angle sensor 70f, and the angle of the bucket 35c detected by the third angle sensor 70g, and moves the operating position of the bucket 35c to a predetermined position.

Note that, although functions related to the front loader 35 have been described as functions classified in the seventh category, the above-mentioned functions are merely examples, and a function (horizontal control) in which the control device 80 controls the control valve of the boom cylinder 35d and the control valve of the bucket cylinder 35e to maintain the horizontal state of the bucket 35c may also be adopted as a function classified in the seventh category.

The eighth category is a classification related to precision work of the working device 10. The eighth category is a classification of functions that perform precision work of the working device 10. The control device 80 can control functions 42 to 43, which are work functions, as functions classified into the eighth category. Function 42 is a function in which the work vehicle 1 performs a predefined series of operations. Information such as the content and order of the series of operations is stored in the storage device 81. The storage device 81 stores, for example, an operation (exit operation) performed when the work vehicle 1 moves from a work area inside the headland in the field to the headland area, and a series of operations (enter operation) performed when the work vehicle 1 moves from the headland area to the working area.

Specifically, when the control device 80 reads out the exit operation from the storage device 81 as the 42nd function, it controls the control valve to raise the working device 10, and controls the hydraulic clutch of the PTO power transmission unit 20e to switch to a state where the power of the propeller shaft 20a is not transmitted to the PTO shaft 22. Furthermore, the control device 80 controls the rear wheel differential device 21R to release the differential lock, and controls the front transmission unit 20f to switch to 2WD.

Furthermore, as a 42nd function, when the control device 80 reads out an intrusion operation from the memory device 81, it controls the front transmission 20f to switch to a 4WD constant speed state, and controls the rear wheel differential device 21R to perform a differential lock. The control device 80 controls the control valve to lower the working device 10, and controls the hydraulic clutch of the PTO power transmission device 20e to switch to a state in which the power of the propeller shaft 20a is transmitted to the PTO shaft 22.

The series of operations performed by the work vehicle 1 in the 42nd function is not limited to the exit operation and the entry operation, but may be any series of operations performed by the work vehicle 1, and the content of the operations is not limited to the examples described above.

The 43rd function is a function in which the working device 10 controls the work vehicle 1 via the control device 80 when the working device 10 is communicably connected to the control device 80. The control device 80 controls, for example, the 17th to 20th functions, the 25th function, and the 26th function based on instructions from a control unit 10b provided in the working device 10 and configured from electric/electronic circuits, programs stored in a CPU, etc.

Note that, although functions related to precision work of the working device 10 have been described as functions classified in the eighth category, the above-mentioned functions are merely examples, and functions classified in the eighth category may also include a function (automatic steering) in which the control device 80 controls an automatic steering mechanism and controls the steering of the vehicle body 2 based on a predetermined driving line.

The ninth category is a classification related to other equipment. The ninth category includes a function for adjusting the volume of the speaker provided in the work vehicle 1 (function 44) and a function for adjusting the operating sensitivity of the operating device 40 (function 45).

The multiple functions (functions 1 to 45) and their categories (categories 1 to 9) described above are merely examples, and the types and classification methods of the functions are not limited. Only some of these functions may be adopted as the functions of the work vehicle 1, or other functions may be added or changed. Although a detailed explanation is omitted, the control device 80 may also be able to execute a function to change the parameters of each function, such as the 10th function of the 9th function that changes the first prime mover rotation speed, and the 12th function of the 11th function that changes the second prime mover rotation speed.

As shown in FIG. 2, the operating device 40 has an operating lever 41, a dial 44, and an operating tool 49. FIG. 5 is a plan view showing the arrangement of the armrest 16 and the like around the driver's seat 4. As shown in FIG. 5, an armrest 16 is provided on the other side (right side) of the driver's seat 4 in the vehicle width direction, and the operating device 40 is provided on the armrest 16. FIG. 6 is a plan view of the armrest 16. As shown in FIG. 5 and FIG. 6, the armrest 16 is arranged with its longitudinal direction facing the front-rear direction and its lateral direction facing the vehicle width direction.

The operating lever 41 is a lever for operating various functions of the work vehicle 1. The operating lever 41 is supported so as to be freely swingable, and can be swung in at least one direction. The operating lever 41 is provided so as to protrude upward in a first region 16a formed on the upper surface of the front part of the armrest 16. The operating device 40 has one or more operating levers 41, and in this embodiment has one operating lever 41.

The number of operating levers 41 provided on the operating device 40 is not limited to one, but may be two or three, and the number is not limited. In addition, the operating direction of the operating lever 41 is not limited to the front-rear direction and the vehicle body width direction, and the number of operating directions and the directions are not limited to the above-mentioned examples.

Figure 7 is an oblique view of the grip portion 41b of the operating lever 41 seen from the upper left rear. As shown in Figure 7, the operating lever 41 has a base end (swinging body) 41a and a grip portion (grip) 41b. The base end 41a is supported so as to be freely swingable on the upper surface of the first region 16a, in other words, around the driver's seat 4 of the work vehicle 1. Specifically, the base end 41a includes a shaft inserted into the first region 16a, and constitutes the swing axis (swinging axis) of the operating lever 41. The base end 41a can swing, for example, in the front-rear direction and the vehicle width direction.

As shown in FIG. 7, the grip portion 41b is provided on the upper part (tip) of the base end portion 41a. The grip portion 41b has a grip portion 41b1 and an operation portion 41b2. The grip portion 41b1 and the operation portion 41b2 of the operation lever 41 are arranged side by side in the vertical direction, and in this embodiment, the operation portion 41b2 is arranged on the upper part of the grip portion 41b1.

The grip portion 41b1 is a portion that is gripped with one hand (right hand) by an operator seated in the driver's seat 4. The operation portion 41b2 is a portion that is operated by an operator who grips the grip portion 41b1 and extends his/her fingers.

2 and 7, the operation lever 41 has one or more operation switches 42. The operation switches 42 are switches for operating various functions of the work vehicle 1. In this embodiment, a plurality of operation switches 42 are provided on the operation lever 41. The operation switches 42 are push button switches (tactile switches) operated by pressing the operation surface 42a, slide switches operated by sliding the operation surface 42a, dial-shaped switches (dial switches) such as selector switches having multiple switching positions, etc. As shown in FIG. 7, the operation switch 42 is disposed on the rear surface of the operation portion 41b2 of the operation lever 41. That is, the plurality of operation switches 42 are disposed on the surface of the grip portion 41b facing the driver's seat 4.

In this embodiment, the number of the operation switches 42 is 13. The operation switches 42 include a first operation switch 42A, a second operation switch 42B, a third operation switch 42C, a fourth operation switch 42D, a fifth operation switch 42E, a sixth operation switch 42F, a seventh operation switch 42G, an eighth operation switch 42H, a ninth operation switch 42I, a tenth operation switch 42J, an eleventh operation switch 42K, a twelfth operation switch 42L, and a thirteenth operation switch 42M.

As shown in FIG. 7, in the example shown in this embodiment, the first operation switch 42A, the second operation switch 42B, the third operation switch 42C, the fourth operation switch 42D, the fifth operation switch 42E, the sixth operation switch 42F, the seventh operation switch 42G, the tenth operation switch 42J, the eleventh operation switch 42K, and the twelfth operation switch 42L are tactile switches. The eighth operation switch 42H and the ninth operation switch 42I are slide switches. Also, the thirteenth operation switch 42M is a dial switch.

The number of operation switches 42 is not limited to 13, but may be one or two, and there is no limit to the number or type.

The dial 44 is a dial switch such as a selector switch having multiple switching positions. As shown in Figs. 2, 5, and 6, the operating device 40 has multiple dials 44, including at least a first dial (first function operating device) 45 and a second dial (second function operating device) 46. Fig. 8 is a perspective view of the first dial 45 and the second dial 46 as viewed from the upper left rear. As shown in Figs. 5, 6, and 8, the dial 44 is provided in a second region 16b formed on the upper surface of the front part of the armrest 16. The second region 16b is an area located behind the first region 16a, and is arranged side by side with the first region 16a in the front-rear direction.

The operation device 40 may have other dials 44 in addition to the first dial 45 and the second dial 46. For example, the operation device 40 may have a third dial 47. The third dial 47 receives an operation instruction for the 25th function when rotated in one direction (clockwise), and receives an operation instruction for the 26th function when rotated in the other direction (counterclockwise).

The operating device 40 may also have a fourth dial 48 that operates the display device 90. The fourth dial 48 can be rotated and pressed. The fourth dial 48 accepts the selection of an item displayed on the display device 90 by being rotated in one direction (clockwise) or the other direction (counterclockwise). The fourth dial 48 also accepts the confirmation (determination) of the selected item by being pressed.

The operating tool 49 is a switch for operating a predetermined function among a plurality of functions. In this embodiment, the operating device 40 has a plurality of operating tools 49. The operating tool 49 is a push button switch (tactile switch) that is operated by pressing. FIG. 9 is a plan view of the plurality of operating tools 49. The operating surface 49a of the operating tool 49 is substantially rectangular in a plan view. As shown in FIGS. 5, 6, and 9, the number of operating tools 49 is ten. The operating tools 49 include a first operating tool 49A, a second operating tool 49B, a third operating tool 49C, a fourth operating tool 49D, a fifth operating tool 49E, a sixth operating tool 49F, a seventh operating tool 49G, an eighth operating tool 49H, a ninth operating tool 49I, and a tenth operating tool 49J. In the example shown in Figures 5, 6, and 9, the first operating tool 49A, the second operating tool 49B, the third operating tool 49C, the fourth operating tool 49D, and the fifth operating tool 49E are arranged side by side in the vehicle body width direction to form a row (first row). The sixth operating tool 49F, the seventh operating tool 49G, the eighth operating tool 49H, the ninth operating tool 49I, and the tenth operating tool 49J are arranged side by side in the vehicle body width direction to form a row (second row). The first row and the second row are arranged side by side in the front-rear direction.

The number of operating tools 49 is not limited to 10, but may be 1 or 2, and the number is not limited.

As shown in Figures 5 and 6, the operating tool 49 is provided in a third region 16c formed on the upper surface of the front part of the armrest 16. The third region 16c is an area located behind the second region 16b and is arranged side by side with the second region 16b in the front-rear direction.

In the above embodiment, the operating device 40 has the operating lever 41, the dial 44, and the operating tool 49. However, the operating device 40 may have at least one of the operating lever 41, the dial 44, and the operating tool 49, and may have other operating members in addition to the operating lever 41, the dial 44, and the operating tool 49. For example, as shown in FIG. 2, the operating device 40 may have one or more swing operating members 50 that are swing operated. The swing operating member 50 accepts an operation instruction for the 32nd function by being swing operated in one direction (forward), and accepts an operation instruction for the 33rd function by being swing operated in the other direction (rearward).

As shown in Figures 5 and 6, the rocking operation member 50 is provided in a fourth region 16d formed on the upper surface of the front part of the armrest 16. The fourth region 16d is an area located behind the third region 16c, and is arranged side by side with the third region 16c in the front-rear direction. More specifically, the fourth region 16d is provided at the rear of the armrest 16, and is arranged in front of the elbow rest portion 16e on which the operator seated in the driver's seat 4 places his elbows.

The operating device 40 preferably has a number of swing operation members 50 corresponding to the number of auxiliary valves 32. That is, in this embodiment, since there are four auxiliary valves 32, the operating device 40 has four swing operation members 50. The four swing operation members 50 are arranged adjacent to each other in the vehicle body width direction, and can be swung around an axis extending approximately in the vehicle body width direction.

2, 5, and 6, the operating device 40 is provided with a selector 51, and can select and operate the operation mode of the operating lever 41. The selector 51 is arranged in the first region 16a near the operating lever 41. The selector 51 is, for example, a physical switch, such as a push button switch (tactile switch) operated by pressing, or a dial-like switch such as a selector switch having multiple switching positions. In this embodiment, the selector 51 is a tactile switch. The operating lever 41 sequentially switches the operation mode in response to the operation of the tactile switch. In the above example, the selector 51 is described using a tactile switch arranged in the first region 16a as an example, but is not limited to a tactile switch, and its position is not limited to the first region 16a. For example, the selector 51 may be a display image displayed on a display screen of the display device 90 or the like and accepting operations.

The operating lever 41 changes the function for which it accepts operation instructions depending on the operation mode selected by the selector 51. This allows the operating lever 41 to operate various functions of the work vehicle 1, and the worker does not need to change his/her grip on the operating lever 41 every time the environment in which the work vehicle 1 is traveling or the work content changes, which prevents the worker from operating the wrong lever or switch. Furthermore, since there is no need to increase the number of operating levers 41 depending on the type of function of the work vehicle 1, the number of operating members on the operating device 40 can be reduced, which not only improves the operability of the operating device 40 as a whole, but also prevents the operating lever 41 from obstructing the worker's view.

The control lever 41 indirectly changes the function for accepting operation instructions by, for example, the control device 80 changing the function corresponding to the operation signal output from the control lever 41. Specifically, the storage device 81 stores multiple tables (standard tables) that associate the operation signal of the control lever 41 with functions according to the operation mode. The control device 80 obtains the standard table corresponding to the operation mode from the storage device 81 and changes the function corresponding to the operation signal output from the control lever 41.

Note that the operation lever 41 only needs to be able to change the function of accepting operation instructions according to the operation mode, and the operation lever 41 itself may change the operation mode and change the function of accepting operation instructions by varying the operation signal output to the control device 80 according to the operation mode. In such a case, the operation lever 41 has an operation control unit (not shown) composed of electric/electronic circuits, programs stored in a CPU, etc., and the operation control unit switches the operation mode and varies the operation signal for the operation. In addition, a storage medium (not shown) connected to the operation control unit stores multiple standard tables that associate operations with operation signals according to the operation mode, and the operation control unit obtains the standard table corresponding to the operation mode from the storage medium and varies the operation signal corresponding to the operation.

The operating lever 41 accepts an operation instruction for a function by a swing operation based on the operation mode selected by the selector 51. In other words, when the operating lever 41 is swing operated, it accepts an operation instruction for a function that differs depending on the operation mode. Alternatively or in addition to this, the operating lever 41 may accept an operation instruction for a function by operating the operation switch 42 based on the operation mode. In other words, when the operation switch 42 is operated, the operating lever 41 may accept an operation instruction for a function that differs depending on the operation mode.

The operation modes of the operating lever 41 include a plurality of modes. In this embodiment, the operation modes include the first to fourth modes. That is, in this embodiment, the storage device 81 stores four standard tables (hereinafter sometimes referred to as the first to fourth standard tables) corresponding to the first to fourth modes, respectively. FIG. 10 is a diagram showing an example of a standard table. Below, the first to fourth modes and the type of operation of the operating lever 41 in each operation mode and the relationship between the operation instructions of the functions accepted by the operation will be explained using FIG. 10.

The first mode is a mode for operating at least the work functions related to work among the functions of the work vehicle 1. In the first mode, the operating lever 41 accepts operation instructions for the work functions by swinging operation. In the first standard table, the operation signal output by the operating lever 41 when it is swinging operation is associated with the work function. In other words, in the first mode, the operating lever 41 does not accept operation instructions for the travel function by swinging operation.

Specifically, in the first mode, when the operating lever 41 is swung forward, it accepts an operation instruction for the 35th function. That is, in the first standard table, the operation signal output by the operating lever 41 when swung forward is associated with the 35th function. Therefore, in the first mode, when the operating lever 41 is swung forward, the control device 80 controls the control valve to contract the boom cylinder 35d and swing the boom 35b downward.

In the first mode, when the operating lever 41 is swung backward, it accepts an operation command for the 36th function. That is, in the first standard table, the operation signal output by the operating lever 41 when swung backward is associated with the 36th function. Therefore, in the first mode, when the operating lever 41 is swung backward, the control device 80 controls the control valve to extend the boom cylinder 35d and swing the boom 35b upward.

In the first mode, when the operating lever 41 is swung to the right, it accepts an operation command for the 37th function. That is, in the first standard table, the operation signal output by the operating lever 41 when swung to the right is associated with the 37th function. Therefore, in the first mode, when the operating lever 41 is swung to the right, the control device 80 controls the control valve to extend the bucket cylinder 35e and perform a dump operation on the bucket 35c.

In the first mode, when the operating lever 41 is swung to the left, it accepts an operation command for function 38. That is, in the first standard table, the operation signal output by the operating lever 41 when swung to the left is associated with function 38. Therefore, in the first mode, when the operating lever 41 is swung to the left, the control device 80 controls the control valve to contract the bucket cylinder 35e and perform a scooping operation on the bucket 35c.

In addition, in the first mode, the operating lever 41 accepts operation instructions for multiple functions, including a work function, by operating the multiple operating switches 42. In other words, in the first standard table, at least one work function is associated with an operation signal that is output by the operating lever 41 when the operating switch 42 is operated.

Specifically, in the first mode, the operating lever 41 accepts an operation instruction for the first function when the first operating switch 42A is operated. That is, in the first standard table, the operation signal output by the operating lever 41 when the first operating switch 42A is operated is associated with the first function. Therefore, in the first mode, when the first operating switch 42A is operated, the control device 80 switches between enabling and disabling the first function in response to the operation, and when the first function is enabled, the control device 80 controls the shifter of the main transmission unit 20b and/or the shifter of the sub-transmission unit 20c based on the vehicle speed detected by the vehicle speed sensor 70h and a predefined control map to change the gear position of the transmission 20.

In the first mode, the operating lever 41 accepts an operation instruction for the 45th function when the second operating switch 42B is operated. That is, in the first standard table, the operation signal output by the operating lever 41 when the second operating switch 42B is operated is associated with the 45th function. Therefore, in the first mode, when the second operating switch 42B is operated, the control device 80 adjusts the operating sensitivity of the operating device 40 in response to the operation of the second operating switch 42B. In this embodiment, the control device 80 adjusts the operating sensitivity of the rocking operation of the operating lever 41, for example, the dead zone, in response to the operation of the second operating switch 42B, and switches the operating sensitivity to multiple stages (levels) from a low state to a high state.

In the first mode, the operating lever 41 accepts an operation instruction for the ninth function when the third operating switch 42C is operated. That is, in the first standard table, the operating signal output by the operating lever 41 when the third operating switch 42C is operated is associated with the ninth function. Therefore, in the first mode, when the third operating switch 42C is operated, the control device 80 switches between enabling and disabling the ninth function in response to the operation, and when the ninth function is enabled, the rotation speed of the prime mover 6 is controlled to the first prime mover rotation speed regardless of the operation of the accelerator pedal.

In the first mode, the operating lever 41 accepts an operation instruction for the seventh function when the fourth operating switch 42D is operated. That is, in the first standard table, the operation signal output by the operating lever 41 when the fourth operating switch 42D is operated is associated with the seventh function. Therefore, in the first mode, when the fourth operating switch 42D is operated, the control device 80 switches between enabling and disabling the seventh function in response to the operation, and when the seventh function is enabled, if the brake pedal is operated and the vehicle speed falls below a predetermined value, the hydraulic clutch of the shuttle unit 20d is switched to the neutral position to cut off the transmission of power to the traveling device 3.

In the first mode, the operating lever 41 accepts an operation instruction for the 41st function when the fifth operating switch 42E is operated. In other words, in the first standard table, the operation signal output by the operating lever 41 when the fifth operating switch 42E is operated is associated with the 41st function. Therefore, in the first mode, when the fifth operating switch 42E is operated, the control device 80 moves the operating position of the front loader 35 (bucket 35c) to a predetermined position in response to the operation.

In the first mode, the operating lever 41 accepts an operation instruction for the 25th function when the sixth operating switch 42F is operated. In other words, in the first standard table, the operation signal output by the operating lever 41 when the sixth operating switch 42F is operated is associated with the 25th function. Therefore, in the first mode, when the sixth operating switch 42F is operated, the control device 80 extends the lift cylinder 30e in response to the operation, and raises the working device 10 connected to the lifting device 30.

In the first mode, the operating lever 41 accepts an operation instruction for the 26th function when the seventh operating switch 42G is operated. In other words, in the first standard table, the operation signal output by the operating lever 41 when the seventh operating switch 42G is operated is associated with the 26th function. Therefore, in the first mode, when the seventh operating switch 42G is operated, the control device 80 contracts the lift cylinder 30e in response to the operation, and lowers the working device 10 connected to the lifting device 30.

In the first mode, the operating lever 41 accepts an operation instruction for the 32nd or 33rd function when the 8th operating switch 42H is operated. That is, in the first standard table, the operation signal output by the operating lever 41 when the 8th operating switch 42H is slid in one direction is associated with the 32nd function, and the operation signal output by the operating lever 41 when the 8th operating switch 42H is slid in the other direction is associated with the 33rd function. In this embodiment, when the 8th operating switch 42H is operated in the first mode, the control device 80 controls the first auxiliary valve 32a in response to the operation to adjust the flow rate of hydraulic oil supplied to the hydraulic attachment 10a.

In the first mode, the operating lever 41 accepts an operation instruction for the 32nd or 33rd function when the 9th operating switch 42I is operated. That is, in the first standard table, the operation signal output by the operating lever 41 when the 9th operating switch 42I is slid in one direction is associated with the 32nd function, and the operation signal output by the operating lever 41 when the 9th operating switch 42I is slid in the other direction is associated with the 33rd function. In this embodiment, when the 9th operating switch 42I is operated in the first mode, the control device 80 controls the second auxiliary valve 32b in response to the operation to adjust the flow rate of hydraulic oil supplied to the hydraulic attachment 10a.

In the first mode, the operating lever 41 accepts an operation instruction for the 40th function when the 10th operating switch 42J is operated. That is, in the first standard table, the operation signal output by the operating lever 41 when the 10th operating switch 42J is operated is associated with the 40th function. Therefore, in the first mode, when the 10th operating switch 42J is operated, the control device 80 has a function of changing the operating speed of the front loader 35. In this embodiment, the control device 80 switches the operating speed of the front loader 35 between multiple stages (levels) from a slow state to a fast state in response to the operation of the 10th operating switch 42J.

In the first mode, the operating lever 41 accepts an operation instruction for the 15th function when the 11th operating switch 42K is operated. That is, in the first standard table, the operating signal output by the operating lever 41 when the 11th operating switch 42K is operated is associated with the 15th function. Therefore, in the first mode, when the 11th operating switch 42K is operated, the control device 80 controls the shuttle unit 20d to switch the rotation direction of the power output from the sub-transmission unit 20c to forward.

In the first mode, the operating lever 41 accepts an operation instruction for the 16th function when the 12th operating switch 42L is operated. That is, in the first standard table, the operating signal output by the operating lever 41 when the 12th operating switch 42L is operated is associated with the 16th function. Therefore, in the first mode, when the 12th operating switch 42L is operated, the control device 80 controls the shuttle unit 20d to switch the rotation direction of the power output from the sub-transmission unit 20c to reverse.

In the first mode, the operating lever 41 accepts an operation instruction for the fourth or fifth function when the 13th operating switch 42M is operated. That is, in the first standard table, the operation signal output by the operating lever 41 when the 13th operating switch 42M is rotated in one direction is associated with the fourth function, and the operation signal output by the operating lever 41 when the 13th operating switch 42M is rotated in the other direction is associated with the fifth function. Therefore, in the first mode, when the 13th operating switch 42M is rotated in one direction, the control device 80 controls the shifter of the main transmission unit 20b and/or the shifter of the sub-transmission unit 20c to increase the gear stage of the transmission 20. Also, in the first mode, when the 13th operating switch 42M is rotated in the other direction, the control device 80 controls the shifter of the main transmission unit 20b and/or the shifter of the sub-transmission unit 20c to decrease the gear stage of the transmission 20.

Therefore, in the first mode, the operating lever 41 receives more operation instructions for work functions than for travel functions through the swing operation and the operation of the multiple operation switches 42. In other words, in the first mode, the operating lever 41 receives operation instructions for work functions with priority over travel functions.

The second mode is a mode for operating at least the driving functions related to driving among the functions of the work vehicle 1. In the second mode, the operating lever 41 accepts operating instructions for the driving functions by swinging operation. In the second standard table, the operating signal output by the operating lever 41 when it is swinging operation is associated with the driving functions. In other words, in the second mode, the operating lever 41 does not accept operating instructions for the work functions by swinging operation.

Specifically, in the second mode, when the operating lever 41 is swung forward, it accepts an operation command for the fourth function. That is, in the second standard table, the operation signal output by the operating lever 41 when swung forward is associated with the fourth function. Therefore, in the second mode, when the operating lever 41 is swung forward, the control device 80 controls the shifter of the main transmission unit 20b and/or the shifter of the sub-transmission unit 20c to increase the gear stage of the transmission 20.

In the second mode, when the operating lever 41 is swung backward, it accepts an operation command for the fifth function. That is, in the second standard table, the operation signal output by the operating lever 41 when swung backward is associated with the fifth function. Therefore, in the second mode, when the operating lever 41 is swung backward, the control device 80 controls the shifter of the main transmission unit 20b and/or the shifter of the sub-transmission unit 20c to lower the gear stage of the transmission 20.

As shown in FIG. 2 and other figures, when the operating lever 41 is provided with a check switch 52, the operating lever 41 will accept an instruction to increase the gear ratio of the main transmission unit 20b when swung forward with the check switch 52 not being operated, and will accept an instruction to decrease the gear ratio of the main transmission unit 20b when swung backward. On the other hand, when the operating lever 41 is swung forward with the check switch 52 being operated, it will accept an instruction to increase the gear ratio of the sub-transmission unit 20c, and will accept an instruction to decrease the gear ratio of the sub-transmission unit 20c when swung backward.

In the second mode, when the operating lever 41 is swung to the right, it accepts an operation instruction for the first function. That is, in the second standard table, the operation signal output by the operating lever 41 when swung to the right is associated with the first function. Therefore, in the second mode, when the operating lever 41 is swung to the right, the control device 80 switches between enabling and disabling the first function in response to the swinging operation, and when the first function is enabled, the control device 80 controls the shifter of the main transmission unit 20b and/or the shifter of the sub-transmission unit 20c based on the vehicle speed detected by the vehicle speed sensor 70h and a predefined control map to change the gear position of the transmission 20.

In the second mode, when the operating lever 41 is swung to the left, it accepts an operation instruction for the 15th or 16th function. That is, in the second standard table, the operation signal output by the operating lever 41 when swung to the left is associated with the 15th or 16th function. Therefore, in the second mode, when the operating lever 41 is swung to the left, the control device 80 switches between the 15th and 16th functions each time the operating lever 41 is swung to the left, and switches the rotation direction of the power output from the sub-transmission unit 20c to forward or reverse.

In addition, in the second mode, the operating lever 41 accepts operation instructions for functions including the driving function by operating the multiple operating switches 42. In other words, in the second standard table, at least one driving function is associated with an operation signal that is output by the operating lever 41 when the operating switch 42 is operated.

In this embodiment, when an operation switch 42 other than the fifth operation switch 42E and the tenth operation switch 42J is operated in the second mode, the operation lever 41 receives an operation instruction for the same function as that received when the same operation switch 42 is operated in the first mode. In other words, the assignment of operations and functions of the operation switches 42 other than the fifth operation switch 42E and the tenth operation switch 42J in the first mode is the same as the assignment of operations and functions of the operation switches 42 other than the fifth operation switch 42E and the tenth operation switch 42J in the second mode.

Therefore, in the following explanation, the explanation of the operation instructions of the functions that the operating lever 41 receives when an operating switch 42 other than the fifth operating switch 42E and the tenth operating switch 42J is operated in the second mode will be omitted.

In the second mode, the operating lever 41 accepts an operation instruction for the second function when the fifth operating switch 42E is operated. That is, in the second standard table, the operation signal output by the operating lever 41 when the fifth operating switch 42E is operated is associated with the second function. Therefore, in the second mode, when the fifth operating switch 42E is operated, the control device 80 switches the mode of the second function in response to the operation, and changes the control target of the first function, etc.

In the second mode, the operating lever 41 accepts an operation instruction for the 14th function when the 10th operating switch 42J is operated. That is, in the second standard table, the operation signal output by the operating lever 41 when the 10th operating switch 42J is operated is associated with the 14th function. Therefore, in the second mode, when the 10th operating switch 42J is operated, the control device 80 controls the shuttle section 20d in response to the operation to switch it to the neutral position, thereby cutting off the transmission of power.

Therefore, in the second mode, the operating lever 41 receives more operation instructions for the driving function than for the work function through the swing operation and the operation of the multiple operating switches 42. In other words, in the second mode, the operating lever 41 receives operation instructions for the driving function with priority over the work function.

The third mode is a mode for operating the travel function and the work function. In the third mode, the operating lever 41 accepts operation instructions for the travel function by swinging operation. In other words, in the third mode, the operating lever 41 does not accept operation instructions for the work function by swinging operation.

Specifically, when the operating lever 41 is swung in a predetermined direction in the third mode, it accepts an operation instruction for the same function as the operation instruction for the function that is accepted when the operating lever 41 is swung in the same direction in the second mode. In other words, the assignment of the swing operation and the function in the second mode is the same as the assignment of the swing operation and the function in the third mode.

Therefore, in the third mode, the operating lever 41 accepts an operation instruction for the fourth function when it is swung forward, and accepts an operation instruction for the fifth function when it is swung backward. Also, in the third mode, the operating lever 41 accepts an operation instruction for the first function when it is swung to the right, and accepts operation instructions for the fifteenth and sixteenth functions alternately each time it is swung to the left.

In addition, in the third mode, the operating lever 41 accepts operation instructions for multiple functions, including the driving function, by operating the multiple operating switches 42. In other words, in the third standard table, at least one of the driving functions and the work function is associated with an operation signal that is output by the operating lever 41 when the operating switch 42 is operated.

The function of the work vehicle 1 to accept operation instructions by operating the operation switch 42 of the operation lever 41 in the third mode is different from the function of the work vehicle 1 to accept operation instructions by operating the operation switch 42 in the second mode. Therefore, when switching between the second mode and the third mode, control of travel by swinging the operation lever 41 can be performed continuously before and after the switch, while different operations can be performed with the same operation switch 42 by switching between the second mode and the third mode.

In this embodiment, when an operation switch 42 other than the fifth operation switch 42E and the tenth operation switch 42J is operated in the second mode, the operation lever 41 accepts an operation instruction of the same function as the operation instruction of the function that is accepted when the same operation switch 42 is operated in the first mode and the second mode. In other words, the assignment of operations and functions of the operation switches 42 other than the fifth operation switch 42E and the tenth operation switch 42J in the first mode and the second mode is the same as the assignment of operations and functions of the operation switches 42 other than the fifth operation switch 42E and the tenth operation switch 42J in the third mode.

Therefore, in the following explanation, the explanation of the operation instructions of the functions that the operating lever 41 receives when an operating switch 42 other than the fifth operating switch 42E and the tenth operating switch 42J is operated in the third mode will be omitted.

Specifically, in the third mode, the operating lever 41 accepts an operation instruction for the 42nd function when the fifth operating switch 42E is operated. That is, in the third standard table, the operation signal output by the operating lever 41 when the fifth operating switch 42E is operated is associated with the 42nd function. Therefore, in the third mode, when the fifth operating switch 42E is operated, the control device 80 executes a series of predefined operations of the work vehicle 1 in response to the operation. In particular, in this embodiment, when the fifth operating switch 42E is operated in the third mode, the control device 80 executes an intrusion operation in response to the operation.

In the third mode, the operating lever 41 accepts an operation instruction for the 43rd function when the 10th operating switch 42J is operated. That is, in the third standard table, the operation signal output by the operating lever 41 when the 10th operating switch 42J is operated is associated with the 43rd function. Therefore, in the third mode, when the 10th operating switch 42J is operated, the control device 80 switches between enabling and disabling the 43rd function in response to the operation, and when the 43rd function is enabled, the control device 80 controls the work vehicle 1 via the control device 80 based on the instruction signal output from the work device 10.

Therefore, in the third mode, the operating lever 41 receives more operation instructions for the driving function than for the work function through the swing operation and the operation of the multiple operating switches 42. In other words, in the third mode, the operating lever 41 receives operation instructions for the driving function with priority over the work function.

The fourth mode is a mode in which operation instructions for the functions of the work vehicle 1 are not accepted through swing operation, but are accepted through operation of the operation switch 42. In other words, when the operation lever 41 is swing operated in the fourth mode, it does not accept operation instructions regardless of the operation direction and amount. In other words, in the fourth standard table, no function is associated with the swing operation of the operation lever 41.

Therefore, when the operating lever 41 is in the fourth mode, the control device 80 does not control (execute) functions based on the operation signal output from the operating lever 41. Therefore, even if the operator accidentally touches the operating lever 41 when leaving or sitting in the driver's seat 4 and the operating lever 41 is swung, the work vehicle 1 can be prevented from unintentionally traveling and/or working.

When the operating lever 41 itself changes the operating mode, the operating lever 41 in the fourth mode may be configured not to output an operating signal to the control device 80 when it is swung.

When the operation switch 42 is operated in the fourth mode, the operation lever 41 receives an operation instruction for the same function as the operation instruction for the function received when the same operation switch 42 is operated in the first mode. In other words, the assignment of operations and functions of the operation switch 42 in the first mode is the same as the assignment of operations and functions of the operation switch 42 in the fourth mode.

As described above, by switching the operating lever 41 between the first to fourth modes, it is possible to use the operating lever 41 to operate the work function and the travel function consecutively without having to change hands to hold the operating lever 41.

Note that the assignment of functions to the swing operations of the operating lever 41 and the assignment of functions to the operations of the operating switch 42 in the above-mentioned operation modes (first to fourth modes) are merely examples and are not limited to the above-mentioned assignments. For example, if the transmission 20 is a continuously variable transmission, the operating lever 41 may receive an operation instruction to execute cruise control when the fourth operating switch 42D is operated.

In addition to the first to fourth modes described above, a new mode may be added. In such a case, the worker operates the display device 90 (second display device 90B) to register the new mode.

When the operation mode of the operating lever 41 is selected by the selector 51, the control device 80 notifies the operator of the selected operation mode. As shown in Figs. 2 and 7, the operating device 40 includes a display unit 43. The display unit 43 is provided on the operating lever 41. The display unit 43 changes the display form according to the operation mode selected by operating the selector 51. This allows the display unit 43 to notify the operator of the operation mode.

The display unit 43 is a lamp that changes the color of the light it emits depending on the operation mode. The lamp is a light generating device that generates light. The lamp is composed of one or more light sources (such as LEDs). In this embodiment, the display unit 43 is a bar-shaped lamp that is disposed at the end of the operation unit 41b2. The display unit 43 is disposed above the operation unit 41b2, extending generally in the vehicle width direction.

The display unit 43 is connected to the control device 80 so that it can communicate with the control device 80, and can be turned on and off, and can be lit in different colors, based on a control signal output from the control device 80. The display unit 43 can generate, for example, blue, orange, green, and red light of the Ostwald color system based on the control signal output from the control device 80. In the following description, when colors are described, all colors are described as colors defined in the Ostwald color system. The display unit 43 can also flash in different colors based on a control signal output from the control device 80.

When the first mode is selected by the selector 51, the control device 80 outputs a control signal to the display unit 43, causing the color of the light emitted by the display unit 43 to change to blue. When the second mode is selected by the selector 51, the control device 80 outputs a control signal to the display unit 43, causing the color of the light emitted by the display unit 43 to change to orange. When the third mode is selected by the selector 51, the control device 80 outputs a control signal to the display unit 43, causing the color of the light emitted by the display unit 43 to change to green. Then, when the fourth mode is selected by the selector 51, the control device 80 outputs a control signal to the display unit 43, causing the color of the light emitted by the display unit 43 to change to red. This allows the operator to easily grasp the current operation mode that has been switched by operating the selector 51.

The above-mentioned combinations of operation modes and colors of light emitted by the display unit 43 are merely examples, and are not limited to the above-mentioned combinations. In the above-mentioned embodiment, the display unit 43 is a lamp that changes the color of the light it emits depending on the operation mode, but the display unit 43 only needs to change the display form depending on at least the operation mode selected by operating the selector 51, and the display form may be changed by changing the number of light sources that are turned on and the number of light sources that are turned off.

In the above embodiment, the display unit 43 is disposed at the end of the operation unit 41b2, but it only needs to be disposed at least around the driver's seat 4 (at a position visible to an operator seated in the driver's seat 4), and its position is not limited to the operation lever 41. For example, the display unit 43 may be disposed in the first region 16a of the armrest 16, or may be disposed in the meter panel 15 or the like other than the armrest 16.

When the operation mode of the operating lever 41 is selected by the selector 51, the control device 80 may control (execute) a predetermined function among a plurality of functions related to the work vehicle 1, or switch between enabled and disabled functions. When the first mode or the fourth mode is selected by the selector 51, the control device 80 may, for example, execute the second function to optimize the control map of the transmission 20.

When the second mode is selected by the selector 51, the control device 80 may, for example, execute the second function to optimize the control map of the transmission 20, execute the 31st and 41st functions, or disable the 13th and 19th functions. Also, when the third mode is selected by the selector 51, the control device 80 may disable the acceptance of operation instructions for the 13th, 19th, 25th, 26th, 29th, 30th, and 34th to 37th functions, etc.

When the third mode is selected by the selector 51, the control device 80 may, for example, execute the second function to optimize the control map of the transmission 20, or enable the thirteenth function, the nineteenth function, etc.

This allows the operability of the work vehicle 1 itself to be improved in response to changes in the operation mode of the operating lever 41.

As shown in FIG. 2, the operating device 40 is equipped with an operable switch 53. The switch 53 is, for example, a push button switch (tactile switch) that is operated by pressing. FIG. 12A is a perspective view of the grip portion 41b of the operating lever 41 as viewed from the front upper right. As shown in FIG. 7 and FIG. 12A, the switch 53 is arranged on a surface of the grip portion 41b different from the operating switch 42, for example, on the back side of the surface on which the multiple operating switches 42 are arranged.

In this embodiment, the switching tool 53 is disposed on the back side of the operating part 41b2 of the grip part 41b. Therefore, the operator who grips the grip part 41b1 operates the switching tool 53 by extending the index finger, middle finger, etc. This prevents the operator from operating the switching tool 53 by mistake instead of the operating switch 42. This prevents the operator from unintentionally performing the second operation. Note that the switching tool 53 only needs to be disposed on a surface of the grip part 41b different from the operating switch 42, and may be disposed on a side surface, not on the back surface of the surface on which the multiple operating switches 42 are disposed. In such a case, as shown in FIG. 12B, the switching tool 53 is preferably disposed on the upper surface (side surface) of the grip part 41b.

Based on the standard tables (first to fourth standard tables) corresponding to the above-mentioned operation modes (first to fourth modes), if the function of the operation instruction that the operation lever 41 accepts by operating the operation switch 42 is defined as the "standard function," then the operation lever 41 can accept an operation instruction for a function (extended function) of the work vehicle 1 that is different from the standard function by operating the operation switch 42 instead of the standard function in response to the operation of the switching device 53.

That is, the operation lever 41 accepts operation instructions for a predetermined standard function among the functions by operating the operation switch 42, and by operating the switching device 53, instead of the standard function, accepts operation instructions for an extended function of the work vehicle 1 that is different from the standard function by operating the operation switch 42. This allows one operation switch 42 to accept operation instructions for multiple functions in response to the operation of the switching device 53. Therefore, there is no need to provide the operation lever 41 with a number of operation switches 42 corresponding to the number of functions of the work vehicle 1, which prevents the operation of the operation switches 42 from becoming complicated and further improves the operability of the operation lever 41.

Specifically, the operation lever 41 accepts operation instructions for the standard function by operation of the operation switch 42 while the switching device 53 is not being operated, and accepts operation instructions for the extended function by operation of the operation switch 42 while the switching device 53 is being operated. Therefore, the operation switch 42 accepts operation instructions for the extended function only while the switching device 53 is being operated, which prevents the worker from operating the extended function by mistake.

When the switching device 53 is operated, the display unit 43 displays the operation of the switching device 53. In this embodiment, the display unit (lamp) 43 indicates the operation of the switching device 53 by flashing while the switching device 53 is being operated, and indicates that the switching device 53 is not being operated by lighting up while the switching device 53 is not being operated. This allows the worker to easily understand whether the function of the operation instruction currently accepted by the operation switch 42 is a standard function or an extended function. This makes it possible to prevent the worker from unintentionally operating the standard function or the extended function when, for example, the worker operates the switching device 53 incorrectly.

2 and 7, the operation switch 42 may have a lighting section 42b provided on the operation surface 42a. The operation switches 42 (in this embodiment, the first operation switch 42A, the second operation switch 42B, the third operation switch 42C, the fourth operation switch 42D, the fifth operation switch 42E, the sixth operation switch 42F, the seventh operation switch 42G, the tenth operation switch 42J, the eleventh operation switch 42K, and the twelfth operation switch 42L) that are tactile switches are provided with a lighting section 42b on their operation surfaces 42a. The lighting section 42b changes its display form when the switching device 53 is not operated and when the switching device 53 is operated. Therefore, by checking the lighting section 42b, the operator can easily understand whether the function of the operation instruction currently accepted by the operation switch 42 is a standard function or an extended function. This prevents the operator from unintentionally operating the standard or extended functions if, for example, the operator operates the switch 53 incorrectly.

Specifically, the lighting unit 42b includes a first lighting unit 42b1 and a second lighting unit 42b2. The first lighting unit 42b1 and the second lighting unit 42b2 are light generating devices that generate light. The first lighting unit 42b1 and the second lighting unit 42b2 are composed of one or more light sources (such as LEDs). The first lighting unit 42b1 is provided on one side of the operation surface 42a (the left side of the operation surface 42a) and indicates the standard function. The first lighting unit 42b1 is turned on when the switch 53 is not operated and is turned off when the switch 53 is operated.

The second lighting section 42b2 is provided on the other side of the operation surface 42a (the right part of the operation surface 42a) and indicates the expansion function. The second lighting section 42b2 is arranged at a distance from the first lighting section 42b1 in the left-right direction of the operation surface 42a. The second lighting section 42b2 is turned off when the switching device 53 is not operated, and is turned on when the switching device 53 is operated. That is, when the switching device 53 is not operated, the first lighting section 42b1 is turned on and the second lighting section 42b2 is turned off, and when the switching device 53 is operated, the first lighting section 42b1 is turned off and the second lighting section 42b2 is turned on.

For this reason, when the switching device 53 is shifted from a non-operated state to an operated state, the lit light source of the lighting section 42b changes from the first lighting section 42b1 to the second lighting section 42b2, and the operator perceives that the lit parts of the first lighting section 42b1 and the second lighting section 42b2 are moving from one side (left) to the other side (right) of the operation surface 42a.

In addition, when the switch 53 is shifted from an operated state to an unoperated state, the lit light source of the lighting section 42b changes from the second lighting section 42b2 to the first lighting section 42b1, so the operator perceives that the lit parts of the first lighting section 42b1 and the second lighting section 42b2 are moving from the other side (right side) to one side (left side) of the operation surface 42a.

As shown in FIG. 7, the first lighting portion 42b1 and the second lighting portion 42b2 are formed in a shape that follows the inner circumference of the operation surface 42a, and each forms part or all of the outline of the inner circumference of the operation surface 42a. The first lighting portion 42b1 extends leftward from the center in the left-right direction of the upper end portion of the operation surface 42a, extends downward from the left end portion of the operation surface 42a, and then extends to the center in the left-right direction of the lower end portion of the operation surface 42a. In other words, the first lighting portion 42b1 is formed in a roughly C-shape.

The second lighting section 42b2 extends to the right from the center in the left-right direction of the upper end of the operation surface 42a, extends downward from the right end of the operation surface 42a, and then extends to the center in the left-right direction of the lower end of the operation surface 42a. In other words, the second lighting section 42b2 is formed in a roughly inverted C-shape.

The color that the first lighting section 42b1 and the second lighting section 42b2 light up is, for example, white. Note that the first lighting section 42b1 and the second lighting section 42b2 may be able to light up in colors other than white. For example, the first lighting section 42b1 and the second lighting section 42b2 may be able to light up in colors such as orange, yellow, blue, purple, and green in addition to white.

As shown in FIG. 7, the operation surface 42a of the operation switch 42, which is a tactile switch, may be provided with icons (standard icons) 42a1 that represent simplified or abbreviated versions of functions (standard functions) defined in a predetermined standard table for each of the first to fourth modes. In this embodiment, the operation surface 42a of the operation switch 42 is provided with a standard icon 42a1 that corresponds to at least the third mode.

Also, like the third operation switch 42C and the fifth operation switch 42E, in addition to the standard icon 42a1, an icon (extended icon) 42a2 that represents the extended function in the third mode in a simplified or abbreviated form may be provided on the operation surface 42a of the operation switch 42. In such a case, it is preferable that the standard icon 42a1 is provided on one side of the operation surface 42a, and the extended icon 42a2 is provided on the other side of the operation surface 42a. Furthermore, it is preferable that the standard icon 42a1 is surrounded by the first lighting portion 42b1, and the extended icon 42a2 is surrounded by the second lighting portion 42b2.

In addition, in the above-described embodiment, an example was described in which the lighting portion 42b is provided on the operation switch 42, which is a tactile switch, but the lighting portion 42b may also be provided on operation switches 42 other than tactile switches (the eighth operation switch 42H, the ninth operation switch 42I, and the twelfth operation switch 42L).

The storage device 81 stores multiple extension tables (first to fourth extension tables) that associate operation signals with functions (extension functions) according to the operation mode, and in the extension tables, an extension function is assigned to the operation of at least one or more operation switches 42. In other words, the extension table may include the operation of an operation switch 42 to which no extension function is assigned.

In this embodiment, the extension table mainly assigns extension functions to the operations of the third operation switch 42C, the fifth operation switch 42E, the eighth operation switch 42H, the ninth operation switch 42I, and the tenth operation switch 42J.

When the switching device 53 is not being operated, the control device 80 obtains from the storage device 81 a standard table corresponding to the operation mode in accordance with the operation mode of the operating lever 41, and when the switching device 53 is being operated, the control device 80 obtains from the storage device 81 an extended table corresponding to the operation mode in accordance with the operation mode of the operating lever 41.

That is, when the third operation switch 42C, the fifth operation switch 42E, the eighth operation switch 42H, the ninth operation switch 42I, and the tenth operation switch 42J are operated while the switching device 53 is being operated, the operation lever 41 accepts an operation instruction for the extended function instead of the standard function.

The operating lever 41 does not accept an instruction to operate the extended function if an operating switch 42 to which no extended function is assigned is operated (for example, the first operating switch 42A, the second operating switch 42B, the fourth operating switch 42D, the sixth operating switch 42F, the seventh operating switch 42G, the eleventh operating switch 42K, the twelfth operating switch 42L, or the thirteenth operating switch 42M) while the switching device 53 is being operated. Therefore, even if an operating switch 42 to which no extended function is assigned is operated while the switching device 53 is being operated, the control device 80 does not control (execute) the function.

The following describes a case where the switching device 53 is operated and the operation lever 41 receives an operation command for the extended function by operating the operation switch 42.

When the operating lever 41 is in the first to fourth modes, the control device 80 acquires an extension table corresponding to the operating mode during the period when the switching device 53 is operated, and controls (executes) the function corresponding to the operation signal output from the operating lever 41. Specifically, when the third operating switch 42C is operated during the period when the switching device 53 is operated, the operating lever 41 in the first to fourth modes accepts an operation instruction for the 11th function as an extended function instead of the 9th function (standard function). That is, in the first to fourth extension tables, the operation signal output by the operating lever 41 when the third operating switch 42C is operated is associated with the 11th function. Therefore, in the first to fourth modes, when the third operating switch 42C is operated during the period when the switching device 53 is operated, the control device 80 switches between enabling and disabling the 11th function in accordance with the operation, and when the 11th function is enabled, the rotation speed of the prime mover 6 is controlled to the second prime mover rotation speed regardless of the operation of the accelerator pedal.

When the eighth operation switch 42H is operated during the period when the switching device 53 is being operated, the operation lever 41 in the first to fourth modes accepts an operation instruction for the 32nd or 33rd function of the third auxiliary valve 32c as an extended function instead of the 32nd or 33rd function (standard function) of the first auxiliary valve 32a when the eighth operation switch 42H is operated. In other words, in the first to fourth extended tables, the operation signal output by the operation lever 41 when the eighth operation switch 42H is slid in one direction is associated with the 32nd function of the third auxiliary valve 32c, and the operation signal output by the operation lever 41 when the eighth operation switch 42H is slid in the other direction is associated with the 33rd function of the third auxiliary valve 32c.

When the ninth operation switch 42I is operated during the period when the selector 53 is being operated, the operation lever 41 in the first to fourth modes accepts an operation instruction for the 32nd or 33rd function of the fourth auxiliary valve 32d as an extended function instead of the 32nd or 33rd function (standard function) of the second auxiliary valve 32b. In other words, in the first to fourth extended tables, the operation signal output by the operation lever 41 when the ninth operation switch 42I is slid in one direction is associated with the 32nd function of the fourth auxiliary valve 32d, and the operation signal output by the operation lever 41 when the ninth operation switch 42I is slid in the other direction is associated with the 33rd function of the fourth auxiliary valve 32d.

When the fifth operation switch 42E is operated while the switching device 53 is being operated, the operation lever 41 in the first and fourth modes accepts an operation instruction for the 39th function as an extended function instead of the 41st function (standard function). That is, in the first and fourth extension tables, the operation signal output by the operation lever 41 when the fifth operation switch 42E is operated is associated with the 39th function. Therefore, in the first and fourth modes, when the fifth operation switch 42E is operated while the switching device 53 is being operated, the control device 80 calculates the mass of the load in the bucket 35c in response to the operation.

When the tenth operation switch 42J is operated while the switching device 53 is being operated, the operation lever 41 in the first and fourth modes accepts an operation instruction for the 38th function as an extended function instead of the 40th function (standard function). That is, in the first and fourth extended tables, the operation signal output by the operation lever 41 when the tenth operation switch 42J is operated is associated with the 38th function. Therefore, in the first and fourth modes, when the tenth operation switch 42J is operated while the switching device 53 is being operated, the control device 80 shakes the bucket 35c to remove the load from the bucket 35c.

In the third mode, the operating lever 41 accepts an operation instruction for the 42nd function, which executes an exit operation as an extended function, instead of the 42nd function (standard function) which executes an entry operation when the fifth operating switch 42E is operated while the switching device 53 is being operated. In other words, in the third extended table, the operation signal output by the operating lever 41 when the fifth operating switch 42E is operated is associated with the 42nd function which executes an exit operation. Therefore, in the third mode, when the fifth operating switch 42E is operated while the switching device 53 is being operated, the control device 80 executes an exit operation in response to the operation.

The combinations of the operation of the operation switch 42 and the operation instructions of the extended function in each of the above-mentioned operation modes are merely examples, and other combinations may be used. For example, when the fifth operation switch 42E is operated during the period in which the switching device 53 is being operated, the operation lever 41 in the third mode may receive an operation instruction to enable and disable automatic steering as an extended function instead of the 43rd function (standard function).

Therefore, the operation lever 41 in the first to fourth modes accepts more operation instructions for the extended functions as a result of the operation of the multiple operation switches 42 than for the driving function. In other words, the operation lever 41 in the first to fourth modes accepts operation instructions for the work function with priority over the driving function while the switching device 53 is being operated.

In the above embodiment, the case has been described where, when the switching device 53 is operated, the display unit 43 displays the operation of the switching device 53, and the lighting unit 42b changes the display form, but when the switching device 53 is operated, the display device 90 (in this embodiment, the first display device 90A) may display the correspondence between the operation of the operation switch 42 and the contents of the extended function that accepts an operation instruction by the operation of the operation switch 42. This allows the worker to easily understand the contents of the extended function, and further, to easily understand whether the function of the operation instruction currently accepted by the operation switch 42 is a standard function or an extended function.

Specifically, when the switch 53 is operated, the first display device 90A obtains an extension table corresponding to the operation mode from the storage device 81 and displays the operation display screen M1.

13 is a diagram showing an example of the operation display screen M1 and the information display screen M2. As shown in FIG. 13, the operation display screen M1 displays a schematic diagram 110 of the operation lever 41 including the operation switch 42, and a first assignment display section 111. The first assignment display section 111 is a display image that displays the functions (standard functions and extended functions) assigned to the operation switch 42 as icons that are simplified and abbreviated. In the example shown in FIG. 13, the first assignment display section 111 has a substantially rectangular image (first icon display section 112) that displays the icon 112a, and a first arrow section 113 that points to the operation switch 42 corresponding to the icon 112a. The outer frame (first category display frame 112b) that shows the outer shape of the first icon display section 112 and surrounds the icon 112a is displayed in different colors depending on the category into which the function corresponding to the icon 112a of the first icon display section 112 is classified.

Specifically, the color of the first category display frame 112b can be orange, yellow, blue, purple, green, etc. The first category display frame 112b is displayed in orange when the function corresponding to the icon 112a is in the first to third categories. The first category display frame 112b is displayed in yellow when the function corresponding to the icon 112a is in the fourth category. The first category display frame 112b is displayed in blue when the function corresponding to the icon 112a is in the fifth to seventh categories. The first category display frame 112b is displayed in purple when the function corresponding to the icon 112a is in the eighth category. And the first category display frame 112b is displayed in green when the function corresponding to the icon 112a is in the eighth category.

An example has been described in which the first category display frame 112b is displayed in different colors depending on the category into which the function corresponding to the icon 112a is classified. In addition to this, or instead, the first arrow section 113 may also be displayed in a different color depending on the category.

The first icon display section 112 also has a first type display section 114 that indicates whether the corresponding operation switch 42 is a tactile switch, a slide switch, a dial switch, or the like. In this embodiment, the first type display section 114 is a circular figure and is displayed in the upper right corner of the first icon display section 112. The first type display section 114 is displayed in green if the corresponding operation switch 42 is a tactile switch, in blue if the corresponding operation switch 42 is a slide switch, and in yellow if the corresponding operation switch 42 is a dial switch.

In addition, the icon 112a is not displayed in the first assignment display section 111 of the operation switch 42 to which no extended function is assigned.

In addition, in the above-described embodiment, the first display device 90A displays the operation display screen M1 while the switch 53 is being operated, but the operation display screen M1 may be displayed at any time by performing a specified operation.

In the example shown in FIG. 13, the operation display screen M1 is displayed in a portion of the display area of the screen displayed by the first display device 90A, and the other display areas display a gear display unit 115 that displays the gear of the transmission 20, a vehicle speed display unit 116 that displays the vehicle speed, and an hour meter 117 that indicates the operating time of the work vehicle 1, but the display form is not limited to the example shown in FIG. 13. In the following description, the screen including the gear display unit 115, vehicle speed display unit 116, and hour meter 117 displayed in the other display areas may be referred to as the information display screen M2. In other words, the first display device 90A displays the operation display screen M1 together with the information display screen M2.

The extension table may also be able to assign any extension function to an operation switch 42 that has not been assigned an extension function in advance. Furthermore, the extension table may also be able to assign another extension function to an operation switch 42 to which an extension function has been assigned. In such a case, the display device 90 (in this embodiment, the second display device 90B) displays the first change screen M3 as shown in FIG. 14 and accepts input for the assignment of an extension function. FIG. 14 is a diagram showing an example of the first change screen M3.

As shown in FIG. 2, the control device 80 has an update unit 80a. The update unit 80a is composed of electric and electronic circuits provided in the control device 80, programs stored in the CPU, etc. The update unit 80a (control device 80) updates (overwrites and saves) the extension table stored in the storage device 81 based on the extension function input accepted by the second display device 90B on the first change screen M3.

As shown in FIG. 14, the first change screen M3 displays a schematic diagram 12A0 of the operating lever 41 including the operating switch 42, a second assignment display section 121, a target switching section 125, a first category selection section 126, and a first function selection section 128. The second assignment display section 121 is a display image that displays the functions assigned to the operating switch 42 as simplified and abbreviated icons.

14, the second assignment display section 121 has a substantially rectangular image (second icon display section 122) that displays an icon 122a, and a second arrow section 123 that points to the operation switch 42 that corresponds to the icon 122a. The outer frame (second category display frame 122b) that shows the outer shape of the second icon display section 122 and surrounds the icon 122a may be displayed in different colors according to the category into which the function corresponding to the icon 122a of the second icon display section 122 is classified, similar to the first category display frame 112b. In addition to or instead of this, the second arrow section 123 may also be displayed in different colors according to the category.

The second icon display section 122 also has a second type display section 124 that indicates whether the corresponding operation switch 42 is a tactile switch, a slide switch, a dial switch, or the like. In this embodiment, the second type display section 124 is a circular figure and is displayed in the upper right corner of the second icon display section 122. The second type display section 124 is displayed in green if the corresponding operation switch 42 is a tactile switch, in blue if the corresponding operation switch 42 is a slide switch, and in yellow if the corresponding operation switch 42 is a dial switch.

The icon 122a is not displayed in the second assignment display section 121 of the operation switch 42 to which no extended function is assigned. The operator selects the operation switch 42 to which the new extended function is to be assigned by selecting an arbitrary second icon display section 122 (for example, by operating the fourth dial 48). This causes the second display device 90B to accept the selection operation of a specific operation switch 42 from among the multiple operation switches 42.

The target switching unit 125 accepts a selection operation of the operation mode of the extension table to be updated by the update unit 80a. In this embodiment, the target switching unit 125 accepts a selection operation of the first to fourth modes. When the target switching unit 125 accepts a selection operation of any of the first to fourth modes, the second display device 90B obtains from the storage device 81 an extension table corresponding to the selected operation mode, and changes the display of the second assignment display unit 121 based on the extension table.

The first category selection unit 126 is a display image that accepts the selection of categories (1st to 9th categories) that classify multiple functions related to the work vehicle 1. The first category selection unit 126 displays multiple approximately rectangular images (category display units 127) that indicate each category with an icon 127a. As shown in FIG. 14, in this embodiment, the first category selection unit 126 displays multiple category display units 127 lined up in the left-right direction of the screen.

The operator selects the category to which the function to be assigned is classified by performing a selection operation (e.g., operating the fourth dial 48) on any category display section 127. This causes the second display device 90B to accept the selection operation of a specific category from among multiple categories.

The first function selection unit 128 is a display image that accepts the selection of a specific function from among a plurality of functions classified into a category for which the first category selection unit 126 has accepted a selection operation. The first function selection unit 128 displays a plurality of roughly rectangular images (third icon display unit 129) indicated by icons 129a that represent each function in a simplified or abbreviated form.

As shown in FIG. 14, in this embodiment, the first function selection unit 128 displays multiple third icon display units 129 arranged horizontally on the screen. This allows the operator to select any third icon display unit 129 by selecting it (for example, by operating the fourth dial 48). This allows the second display device 90B to accept the selection of a predetermined function from among the multiple functions as an extended function. The update unit 80a assigns the function corresponding to the selected third icon display unit 129 as an extended function to the operation switch 42 corresponding to the selected second icon display unit 122, and updates (overwrites) the extended table stored in the storage device 81.

The third icon display section 129 has a third type display section 130 that indicates which type of operation switch 42, such as a tactile switch, a slide switch, or a dial switch, the corresponding function can be operated with. In this embodiment, the third type display section 130 is a circular figure that is displayed in the upper right corner of the third icon display section 129. Similar to the second type display section 124, the third type display section 130 is displayed in green if the corresponding function can be operated with a tactile switch, in blue if the corresponding function can be operated with a slide switch, and in yellow if the corresponding function can be operated with a dial switch.

In addition, in the extension table corresponding to the mode for which the target switching unit 125 has accepted the selection operation, a check mark is added to the third type display unit 130 of the third icon display unit 129, which indicates a function that has already been assigned to the operation of any of the operation switches 42, i.e., a function that has already been assigned as an extension function.

In the above embodiment, the update unit 80a updates the extension table to change the allocation of functions (extended functions) to operations of the operation switch 42. However, the update unit 80a may update the standard table to change the allocation of functions (standard functions) to operations of the operation switch 42. When the control device 80 changes the standard table, the target switching unit 125 accepts a selection of whether to update the extension table or the standard table.

Note that the first change screen M3 shown in FIG. 14 is merely an example, and the method of assigning the screen, the extended functions in the extended table, and the standard functions in the standard table are not limited to the above-mentioned example.

When the standard table corresponding to the operation mode is updated, the color in which the first lighting section 42b1 lights up changes according to the category into which the function whose allocation has been changed is classified. When the extension table corresponding to the operation mode is updated, the color in which the second lighting section 42b2 lights up changes according to the category into which the function whose allocation has been changed is classified.

Specifically, if the standard table corresponding to the operation mode has not been updated from the initial setting (the state defined at the time of shipment from the factory), the color that the first lighting unit 42b1 lights up is white. When the standard table corresponding to the operation mode has been updated from the initial setting, the control device 80 changes the control signal output to the first lighting unit 42b1 based on the acquired standard table, and when the switch 53 has not been operated and the first lighting unit 42b1 is to be lit, it lights up in the color that corresponds to the category into which the updated standard function is classified.

In detail, the control device 80 lights up the first lighting part 42b1 in orange when the function corresponding to the operation switch 42 provided with the first lighting part 42b1 is in the first to third categories and the switching device 53 is not operated in the updated standard table. The control device 80 lights up the first lighting part 42b1 in yellow when the function corresponding to the operation switch 42 provided with the first lighting part 42b1 is in the fourth category and the switching device 53 is not operated in the updated standard table. The control device 80 lights up the first lighting part 42b1 in blue when the function corresponding to the operation switch 42 provided with the first lighting part 42b1 is in the fifth to seventh categories and the switching device 53 is not operated in the updated standard table. The control device 80 lights up the first lighting part 42b1 in purple when the function corresponding to the operation switch 42 provided with the first lighting part 42b1 is in the eighth category and the switching device 53 is not operated in the updated standard table. Then, in the updated standard table, if the function corresponding to the operation switch 42 on which the first lighting section 42b1 is provided is in the eighth category and the switch 53 is not operated, the control device 80 lights up the first lighting section 42b1 in green.

If the extension table corresponding to the operation mode has not been updated from the initial setting, the second lighting unit 42b2 lights up in white. If the standard table corresponding to the operation mode has been updated from the initial setting, the control device 80 changes the control signal output to the second lighting unit 42b2 based on the acquired standard table, and if the switch 53 has not been operated and the second lighting unit 42b2 is to be lit, it lights up in a color corresponding to the category into which the updated extension function is classified.

Specifically, the control device 80 lights up the second lighting section 42b2 in orange if the function corresponding to the operation switch 42 provided with the second lighting section 42b2 in the updated standard table is in the first to third categories and the switch 53 is operated. The control device 80 lights up the second lighting section 42b2 in yellow if the function corresponding to the operation switch 42 provided with the second lighting section 42b2 in the updated standard table is in the fourth category and the switch 53 is operated. The control device 80 lights up the second lighting section 42b2 in blue if the function corresponding to the operation switch 42 provided with the second lighting section 42b2 in the updated standard table is in the fifth to seventh categories and the switch 53 is operated. If the function corresponding to the operation switch 42 provided with the second lighting unit 42b2 is in the eighth category in the updated standard table and the switch 53 is being operated, the control device 80 lights up the second lighting unit 42b2 in purple. If the function corresponding to the operation switch 42 provided with the second lighting unit 42b2 is in the eighth category in the updated standard table and the switch 53 is being operated, the control device 80 lights up the second lighting unit 42b2 in green.

The update unit 80a can update the function assigned to the operating tool 49 to a different function. Specifically, as shown in FIG. 15, the storage device 81 stores a table (operation table) that associates the operation signal of the operating tool 49 with a function, similar to the standard table and extended table of the operation switch 42, and the control device 80 acquires the operation table from the storage device 81 and controls (executes) the function based on the operation signal output from the operating tool 49 and the operation table. FIG. 15 is a diagram showing an example of the operation table. Also, the update unit 80a (control device 80) updates (overwrites and saves) the operation table stored in the storage device 81 based on the function for which the second display device 90B has accepted the input for updating.

First, using FIG. 15, the assignment of functions to the operations of each operating device 49 in the operation table before the update unit 80a updates it, i.e., the initially set operation table (initial table), will be described. In the following description, the function assigned to the operation signal output by the operating device 49 in the initial table will be described as the "initial function", and the function updated from the initial function in the operation table updated by the update unit 80a will be described as the "updated function". That is, of multiple functions, a predetermined initial function is assigned to the operating device 49 in advance, and the update unit 80a updates the function assigned to the operating device 49 to an updated function of the multiple functions that is different from the initial function.

Specifically, in the initial table, the operation signal output by the first operating device 49A when the first operating device 49A is operated is associated with the 17th function, and the first operating device 49A accepts an operation instruction for the 17th function when operated. Therefore, if the update unit 80a has not updated the initial table, when the first operating device 49A is operated, the control device 80 controls the front shift unit 20f in response to the operation and switches to the 4WD constant speed state.

In the initial table, the operation signal output by the second operating device 49B when the second operating device 49B is operated is associated with the 18th function, and the second operating device 49B accepts an operation instruction for the 18th function when operated. Therefore, if the update unit 80a has not updated the initial table, when the second operating device 49B is operated, the control device 80 switches between enabling and disabling the 18th function in response to the operation, and when the 18th function is enabled, the control device 80 controls the front transmission unit 20f based on the vehicle speed and the steering angle of the steering device to switch between 2WD and 4WD constant speed states.

In the initial table, the operation signal output by the third operating device 49C when the third operating device 49C is operated is associated with the 20th function, and the third operating device 49C accepts an operation instruction for the 20th function when operated. Therefore, if the update unit 80a has not updated the initial table, when the third operating device 49C is operated, the control device 80 fixes (directly connects) the rear wheel differential device 21R based on the operator's operation in response to the operation.

In the initial table, the operation signal output by the fourth operating device 49D when the fourth operating device 49D is operated is associated with the 13th function, and the fourth operating device 49D accepts an operation instruction for the 13th function when operated. Therefore, if the update unit 80a has not updated the initial table, when the fourth operating device 49D is operated, the control device 80 switches between enabling and disabling the 13th function in response to the operation, and when the 13th function is enabled, the control device 80 controls the rotation speed of the prime mover 6 based on the vehicle speed and the load on the prime mover 6.

In the initial table, no function is associated with the operation signal output by the fifth operating device 49E when the fifth operating device 49E is operated, and the fifth operating device 49E does not accept an operation instruction for a function even when operated until the operation table is updated by the update unit 80a and a function is associated with the operation signal output by the fifth operating device 49E. The fifth operating device 49E accepts an operation instruction for the associated function when the fifth operating device 49E is operated, after the operation table is updated by the update unit 80a and a function is associated with the operation signal output by the fifth operating device 49E.

In the initial table, the seventh function is associated with the operation signal output by the sixth operating device 49F when the sixth operating device 49F is operated, and the sixth operating device 49F accepts an operation instruction for the seventh function when operated. Therefore, if the update unit 80a has not updated the initial table, when the seventh operating device 49G is operated, the control device 80 switches between enabling and disabling the seventh function in response to the operation, and when the seventh function is enabled, if the brake pedal is operated and the vehicle speed falls below a predetermined value, the hydraulic clutch of the shuttle unit 20d is switched to the neutral position to cut off the transmission of power to the traveling device 3.

In the initial table, the operation signal output by the seventh operating device 49G when the seventh operating device 49G is operated is associated with the eighth function, and the seventh operating device 49G accepts an operation instruction for the eighth function when operated. Therefore, if the update unit 80a has not updated the initial table, when the eighth operating device 49H is operated, the control device 80 switches between enabling and disabling the eighth function in response to the operation, and when the eighth function is enabled, changes the control of the transmission 20 based on the load on the prime mover 6.

In the initial table, the operation signal output by the eighth operating device 49H when the eighth operating device 49H is operated is associated with the 24th function, and the eighth operating device 49H accepts an operation instruction for the 24th function when operated. Therefore, if the update unit 80a has not updated the initial table, when the eighth operating device 49H is operated, the control device 80 switches between enabling and disabling the 24th function in response to the operation, and when the 24th function is enabled, the control device 80 controls the PTO power transmission unit 20e to switch the power transmission to the PTO shaft 22 in response to the height of the working device 10.

In the initial table, the operation signal output by the ninth operating device 49I when the ninth operating device 49I is operated is associated with the 19th function, and the ninth operating device 49I accepts an operation instruction for the 19th function when operated. Therefore, if the update unit 80a has not updated the initial table, when the ninth operating device 49I is operated, the control device 80 controls the front shift unit 20f in response to the operation and switches to the 4WD acceleration state.

In the initial table, no function is associated with the operation signal output by the tenth operating device 49J when the tenth operating device 49J is operated, and the tenth operating device 49J does not accept an operation instruction for a function even when operated until the operation table is updated by the update unit 80a and a function is associated with the operation signal output by the tenth operating device 49J. The tenth operating device 49J accepts an operation instruction for the associated function when the tenth operating device 49J is operated, after the operation table is updated by the update unit 80a and a function is associated with the operation signal output by the tenth operating device 49J.

When a predetermined operation is performed on the display device 90 (in this embodiment, the second display device 90B), the second display device 90B displays a second change screen M4 as shown in FIG. 16 and accepts input of the allocation of the update function. FIG. 16 is a diagram showing an example of the second change screen M4. As shown in FIG. 16, the second change screen M4 displays a schematic diagram 140 of the operation tool 49, a third allocation display section 141, a second category selection section 144, and a second function selection section 146. The third allocation display section 141 is a display image that displays the functions assigned to the operation tool 49 as icons that are simplified and abbreviated. In the example shown in FIG. 16, the third allocation display section 141 has a substantially rectangular image (fourth icon display section 142) that displays an icon 142a, and a third arrow section 143 that points to the operation tool 49 corresponding to the icon 142a. The outer frame (third category display frame 142b) that shows the outer shape of the fourth icon display section 142 and surrounds the icon 142a may be displayed in different colors according to the category into which the function corresponding to the icon 142a of the fourth icon display section 142 is classified, similar to the first category display frame 112b. In addition to this, or instead, the third arrow section 143 may also be displayed in different colors according to the category.

The icon 142a is not displayed in the third assignment display section 141 of the operating device 49 (e.g., the fifth operating device 49E and the tenth operating device 49J) to which the update function is not assigned. The operator selects the operating device 49 to which the operator wants to assign a new function (update function) by performing a selection operation (e.g., operating the fourth dial 48) on any of the fourth icon display sections 142. In this way, the second display device 90B accepts the selection operation of a specific operating device 49 from among the multiple operating devices 49.

The second category selection unit 144 is a display image that accepts the selection of categories (1st to 9th categories) that classify multiple functions related to the work vehicle 1. The second category selection unit 144 displays multiple approximately rectangular images (category display units 145) in which each category is indicated by an icon 145a. As shown in FIG. 16, in this embodiment, the second category selection unit 144 displays multiple category display units 145 side-by-side in the left-right direction of the screen. The worker selects the category in which the function to be assigned is classified by performing a selection operation (for example, operating the fourth dial 48) on any category display unit 145. This causes the second display device 90B to accept the selection operation of a predetermined category from among the multiple categories.

The second function selection unit 146 is a display image that accepts the selection of a specific function from among a plurality of functions classified into a category for which the second category selection unit 144 has accepted a selection operation. The second function selection unit 146 displays a plurality of roughly rectangular images (fifth icon display units 147) each showing a function with an icon 147a. As shown in FIG. 16, in this embodiment, the second function selection unit 146 displays a plurality of fifth icon display units 147 aligned in the left-right direction of the screen.

In this embodiment, since the operating tool 49 is a tactile switch, the functions displayed by the second function selection unit 146 are at least the functions that can be operated with a tactile switch among the multiple functions classified into the category for which the second category selection unit 144 has accepted a selection operation. The second function selection unit 146 blacks out the functions that cannot be operated with a tactile switch among the multiple functions classified into the category for which the second category selection unit 144 has accepted a selection operation, and displays them as unavailable for selection or hides them.

The fifth icon display section 147 is provided with a mark 148 indicating whether a function has already been assigned to the operation of any of the operating tools 49 in the operation table, i.e., whether the function has already been assigned as an initial function or an updated function. The mark 148 is a round shape, and a check mark is added to the fifth icon display section 147 of a function that has already been assigned as an initial function or an updated function.

The operator selects the fifth icon display section 147 of the function to be assigned by selecting any fifth icon display section 147 (for example, by operating the fourth dial 48). As a result, the second display device 90B accepts the selection operation of a predetermined function from among the multiple functions as an update function. The update unit 80a assigns the function corresponding to the selected fifth icon display section 147 as an update function to the operating tool 49 corresponding to the selected fifth icon display section 147, and updates (overwrites and saves) the operation table stored in the storage device 81.

Note that the second change screen M4 shown in FIG. 16 is merely an example, and the method of assigning update functions on that screen and in the operation table is not limited to the example described above.

As shown in FIG. 9, the operating device 49 is provided with an icon 49a1 indicating an initial function. Specifically, the icon 49a1 is a graphic representation of the initial function in a simplified and abbreviated form, and is provided in the center of the operating surface 49a of the operating device 49. Also, as shown in FIG. 2 and FIG. 9, the operating device 49 has a first indicator lamp 49b1, a second indicator lamp 49b2, and a third indicator lamp 49b3.

The first indicator lamp 49b1, the second indicator lamp 49b2, and the third indicator lamp 49b3 are light generating devices that generate light. The first indicator lamp 49b1, the second indicator lamp 49b2, and the third indicator lamp 49b3 are composed of one or more light sources (LEDs, etc.). In this embodiment, the control device 80 turns on the first indicator lamp 49b1, the second indicator lamp 49b2, and the third indicator lamp 49b3 during the period when an operation instruction can be received, in other words, during the period when the work vehicle 1 is activated. Note that the control device 80 may turn off the first indicator lamp 49b1, the second indicator lamp 49b2, and the third indicator lamp 49b3 when an error occurs in the function corresponding to the operating tool 49 or when the execution of the function is restricted depending on the operation mode of the operating lever 41.

The following describes the colors that the first indicator lamp 49b1, the second indicator lamp 49b2, and the third indicator lamp 49b3 light up.

The first indicator lamp 49b1 changes its display form depending on the category to which the function (updated function) updated by the update unit 80a belongs. The first indicator lamp 49b1 lights up in a different color depending on the category to which the function updated by the update unit 80a belongs. This allows the operator to easily understand the classification (category) of the function updated by the update unit 80a. This makes it possible to prevent erroneous operations even when the operating tool 49 updates a function that accepts operating instructions.

Specifically, when the functions of the operation table stored in the storage device 81 have not been updated and the operation signal is associated with the initial function, the first indicator lamp 49b1 of the operating device 49 lights up in white. When the operation table is updated, the control device 80 changes the control signal output to the first indicator lamp 49b1 based on the acquired updated operation table, and lights up the first indicator lamp 49b1 of the operating device 49, in which the operation signal is associated with the updated function, in a color corresponding to the category into which the updated standard function is classified.

In detail, the control device 80 lights up the first indicator lamp 49b1 in orange when the updated function corresponding to the operating tool 49 provided with the first indicator lamp 49b1 in the updated operation table is in the first to third category. The control device 80 lights up the first indicator lamp 49b1 in yellow when the updated function corresponding to the operating tool 49 provided with the first indicator lamp 49b1 in the updated operation table is in the fourth category. The control device 80 lights up the first indicator lamp 49b1 in blue when the updated function corresponding to the operating tool 49 provided with the first indicator lamp 49b1 in the updated operation table is in the fifth to seventh category. The control device 80 lights up the first indicator lamp 49b1 in purple when the function corresponding to the operating tool 49 provided with the first indicator lamp 49b1 in the updated operation table is in the eighth category. Then, in the updated operation table, if the updated function corresponding to the operation tool 49 provided with the first indicator lamp 49b1 is in the eighth category, the control device 80 turns on the first indicator lamp 49b1 in green.

The second indicator lamp 49b2 changes the display form depending on whether the function assigned to the operating tool 49 is enabled or disabled. Specifically, the control device 80 changes the control signal output to the second indicator lamp 49b2 of the operating tool 49 depending on whether the function assigned to the operating tool 49 is enabled or disabled. In this embodiment, when the function to accept operation instructions is disabled, the second indicator lamp 49b2 lights up in white. On the other hand, when the function to accept operation instructions is enabled, the second indicator lamp 49b2 lights up in green. Note that, regardless of the operation of the operating tool 49, when the same function is assigned to another operating tool 49 or another operating member (not limited to a physical switch, including a display image displayed on the display device 90 and accepting operations) other than the operating tool 49, when this function is enabled by operating another operating tool 49, etc., the display form of the second indicator lamp 49b2 of the operating tool 49 may be changed.

The third indicator lamp 49b3 lights up white. In this embodiment, two third indicator lamps 49b3 are provided on the operating device 49, and the two third indicator lamps 49b3 do not light up in any color other than white. Note that the control device 80 may light up the third indicator lamp 49b3 in red or blink when an error occurs in the function corresponding to the operating device 49 on which the third indicator lamp 49b3 is provided.

Next, the arrangement and shape of the first indicator lamp 49b1, the second indicator lamp 49b2, and the third indicator lamp 49b3 will be described. The first indicator lamp 49b1, the second indicator lamp 49b2, and the third indicator lamp 49b3 are arranged in positions surrounding the icon 49a1. The first indicator lamp 49b1, the second indicator lamp 49b2, and the third indicator lamp 49b3 are formed in a shape that follows the inner circumference of the operation surface 49a of the operation tool 49, and each forms a part or the whole of the outline of the inner circumference of the operation surface 49a. This allows the operator to not only easily grasp whether the function is enabled or disabled by checking the second indicator lamp 49b2, but also to more easily and reliably recognize the position of the operation tool 49 by the first indicator lamp 49b1, the second indicator lamp 49b2, and the third indicator lamp 49b3.

Specifically, the first indicator lamp 49b1, the second indicator lamp 49b2, and the third indicator lamp 49b3 are arranged at the corners of the operation surface 49a. The first indicator lamp 49b1 is arranged at the front left of the operation surface 49a, and the second indicator lamp 49b2 is arranged at the front right of the operation surface 49a. The third indicator lamp 49b3 is arranged at the rear left and rear right of the operation surface 49a.

The first indicator lamp 49b1 extends leftward from the center of the front end of the operation surface 49a in the left-right direction and reaches the center of the left end of the operation surface 49a in the front-rear direction. In other words, the first indicator lamp 49b1 is formed in a roughly inverted L shape.

The second indicator lamp 49b2 extends to the right from the center in the left-right direction of the front end of the operation surface 49a and reaches the center in the front-rear direction of the right end of the operation surface 49a. In other words, the second indicator lamp 49b2 is formed in a roughly L-shape.

The third indicator lamp 49b3 located at the rear left of the operation surface 49a extends leftward from the center in the left-right direction of the rear end of the operation surface 49a and reaches the center in the front-rear direction of the left end of the operation surface 49a. In other words, the third indicator lamp 49b3 located at the rear left of the operation surface 49a is formed in a roughly L-shape.

The third indicator lamp 49b3 located on the right rear of the operation surface 49a extends rightward from the center in the left-right direction of the rear end of the operation surface 49a and reaches the center in the front-rear direction of the right end of the operation surface 49a. In other words, the third indicator lamp 49b3 located on the right rear of the operation surface 49a is formed in a roughly inverted L shape.

In this embodiment, the first indicator lamp 49b1, the second indicator lamp 49b2, and the third indicator lamp 49b3 are arranged at intervals. Specifically, the right end of the first indicator lamp 49b1 and the left end of the second indicator lamp 49b2 are arranged at a distance in the left-right direction. The rear end of the first indicator lamp 49b1 and the front end of the left rear third indicator lamp 49b3 are arranged at a distance in the front-rear direction. The rear end of the second indicator lamp 49b2 and the front end of the right rear third indicator lamp 49b3 are arranged at a distance in the front-rear direction. The right end of the left rear third indicator lamp 49b3 and the left end of the right rear third indicator lamp 49b3 are arranged at a distance in the left-right direction.

In the above embodiment, the first indicator lamp 49b1, the second indicator lamp 49b2, and the third indicator lamp 49b3 are arranged at intervals from each other, but as long as the indications (on and off, etc.) of the first indicator lamp 49b1, the second indicator lamp 49b2, and the third indicator lamp 49b3 can be distinguished, the first indicator lamp 49b1, the second indicator lamp 49b2, and the third indicator lamp 49b3 may be arranged close to each other.

The dial 44 can also accept an operation to change the control parameters of the functions. In other words, the dial 44 can accept an operation instruction for a function to change the parameters of each function, such as the tenth function for changing the first prime mover rotation speed of the ninth function, the twelfth function for changing the second prime mover rotation speed of the eleventh function, etc. The control device 80 changes the control parameters of each function stored in the storage device 81 based on the operation signal output from the dial 44.

The first dial (first function operating tool) 45 is an operating member (a physical dial switch in this embodiment) for selecting a plurality of functions by rotating the dial. The options (candidate functions) of the functions that can be selected by the first dial 45 are stored in advance in the storage device 81. When the first dial 45 is operated, the control device 80 acquires the operation signal output from the first dial 45, and displays the third change screen M5 on the display device 90 (the first display device 90A in this embodiment) as shown in FIG. 17. FIG. 17 is a diagram showing an example of the third change screen M5 and the information display screen M2. As shown in FIG. 17, the first display device 90A displays the third change screen M5 together with the information display screen M2, similar to the operation display screen M1. The third change screen M5 displays the functions that can be selected by the first dial 45. The display device 90 displays the one function selected by the first dial 45 in a different display form from the other functions.

As shown in FIG. 17, the third change screen M5 displays a selection function display section 150 and a candidate function display section 151. The selection function display section 150 is an image that displays a function selected and operated with the first dial 45 as an icon. The candidate function display section 151 is an image that displays other functions as icons. In the example shown in FIG. 17, the candidate function display section 151 is arranged on one side (left) and the other side (right) of the left and right directions of the selection function display section 150. The third change screen M5 displays a predetermined function among the functions that can be selected and operated with the first dial 45 in the selection function display section 150, and displays the function displayed by the candidate function display section 151 in the selection function display section 150 in place of the function displayed in the selection function display section 150 in response to the operation of the first dial 45. That is, the functions displayed in the selection function display section 150 are switched sequentially in response to the operation of the first dial 45. In the example of the third change screen M5 shown in FIG. 17, the 27th function is selected and operated.

In the example of the third change screen M5 shown in FIG. 17, the candidate function display section 151 is arranged on one side (left) and the other side (right) of the left-right direction of the selected function display section 150, and the candidate function display section 151 displays all functions other than the one function displayed by the selected function display section 150 among the functions that can be selected and operated with the first dial 45, but it is sufficient to be able to display at least one other function, and the display form is not limited to the example shown in FIG. 17.

The second dial (second function operating tool) 46 is an operating member (a physical dial switch in this embodiment) that changes the control parameters of the function selected and operated by the first dial 45 by a rotation operation. The display device 90 (first display device 90A) can display the control parameters changed by the second dial 46. Specifically, when the first display device 90A displays the third change screen M5, if the second dial 46 is operated, the control device 80 determines the one function selected and operated by the operation of the first dial 45 as the function whose parameters are to be changed. When the function whose parameters are to be changed is determined, as shown in FIG. 18, the first display device 90A transitions the display from the third change screen M5 to the fourth change screen M6 showing the control parameters. FIG. 18 is a diagram showing an example of the fourth change screen M6 and the information display screen M2. As shown in FIG. 18, the first display device 90A displays the fourth change screen M6 together with the information display screen M2, similar to the operation display screen M1 and the third change screen M5.

As shown in FIG. 18, the fourth change screen M6 has a target function display section 160 and a parameter display section 161. The target function display section 160 is an image that shows, with an icon, the function for which parameters are to be changed. The parameter display section 161 is an image that displays candidates for changed parameters (candidate parameters) in response to the operation of the second dial 46. In this embodiment, the parameter display section 161 displays the candidate parameters as numerical values. Note that the parameter display section 161 only needs to be able to display the candidate parameters, and the display form is not limited to numerical values, and may be, for example, a bar-shaped meter shape whose length changes depending on the size of the candidate parameter.

When the second dial 46 is operated, the parameter display unit 161 changes the display form of the candidate parameters in response to the operation. In the example shown in FIG. 18, the parameter display unit 161 displays the numerical values of the candidate parameters larger when the second dial 46 is rotated in one direction (clockwise), and displays the numerical values of the candidate parameters smaller when the second dial 46 is rotated in the other direction (counterclockwise).

The control device 80 confirms the candidate parameters displayed by the parameter display unit 161 when a predetermined time has elapsed since the second dial 46 was operated, when the first dial 45 is operated, etc. The control device 80 changes the control parameters of the function stored in the storage device 81 and displayed on the target function display unit 160 based on the confirmed candidate parameters.

The method of confirming the candidate parameters displayed by the parameter display unit 161 is not limited to the above-mentioned method. For example, if the second dial 46 accepts a pressing operation, the control device 80 may confirm the candidate parameters in response to the pressing operation of the second dial 46. Furthermore, if the operation device 40 has an operation member other than the first dial 45 and the second dial 46, the control device 80 may confirm the candidate parameters in response to the operation of the operation member.

With the above configuration, the operator can quickly change function parameters by selectively using the first dial 45 and the second dial 46.

Next, the arrangement of the first dial 45 and the second dial 46 will be described. As shown in Figures 6 and 8, the axial direction of the rotation axis L1 of the first dial 45 is different from the axial direction of the rotation axis L2 of the second dial 46. In addition, the axial direction of the rotation axis L1 of the first dial 45 is perpendicular to the axial direction of the rotation axis L2 of the second dial 46. This allows the operator to easily distinguish which dial 44 to operate to select a function and operate a parameter. This makes it possible to quickly operate the parameters of the functions of the work vehicle 1.

In this embodiment, the axis of the rotation axis L1 of the first dial 45 extends in the vertical direction, and the axis of the rotation axis L2 of the second dial 46 extends in the vehicle width direction. The worker can rotate the first dial 45 clockwise or counterclockwise around the axis in the vertical direction. The worker can also rotate the second dial 46 forward or backward around the axis in the vehicle width direction.

The first dial 45 and the second dial 46 are arranged adjacent to each other in the front-to-rear direction. This allows the operator to quickly operate the second dial 46 by moving his/her wrist while maintaining the position in which he/she operates the first dial 45.

The axial direction and position of the rotation axis L1 of the first dial 45 and the axial direction and position of the rotation axis L2 of the second dial 46 are not limited to the above-mentioned directions and positions. For example, the first dial 45 and the second dial 46 may be disposed adjacent to each other in the vehicle width direction.

The control device 80 may also have a change unit 80b, which changes the options (candidate functions) of the functions that can be selected and operated using the first dial 45 from among the multiple functions. The change unit 80b is composed of electric/electronic circuits provided in the control device 80, programs stored in the CPU, etc. The update unit 80a (control device 80) updates (overwrites and saves) the candidate functions stored in the storage device 81 based on the function input accepted by the display device 90 (in this embodiment, the second display device 90B) on the fifth change screen M7.

When a predetermined operation is performed on the display device 90 (in this embodiment, the second display device 90B), the second display device 90B displays a fifth change screen M7 as shown in FIG. 19 and accepts a selection input of a candidate function. FIG. 19 is a diagram showing an example of the fifth change screen M7. As shown in FIG. 19, the fifth change screen M7 displays a selection display section 170, a third category selection section 173, and a third function selection section 175. The selection display section 170 is a display image that displays the function selected as the candidate function in an icon 171a that is a simplified and abbreviated representation. When the fifth change screen M7 is displayed, the selection display section 170 first displays the candidate function displayed in the selection function display section 150 and the candidate function displayed in the candidate function display section 151, and in the example shown in FIG. 19, it has a substantially rectangular image (sixth icon display section 171) that displays the icon 171a. The outer frame (fourth category display frame 171b) that shows the outer shape of the sixth icon display section 171 and surrounds the icon 171a may be displayed in a different color according to the category into which the function corresponding to the icon 171a of the sixth icon display section 171 is classified, similar to the first category display frame 112b.

In addition, the icon 171a is not displayed in the sixth icon display section 171 where no candidate function has been selected and input. Also, in the example shown in FIG. 19, the fifth change screen M7 has the selection display section 170 displaying five sixth icon display sections 171 and can accept the selection and input of five candidate functions, but the number of sixth icon display sections 171, i.e., the number of candidate functions, can be appropriately added or deleted by operating the add button 172, etc., of the fifth change screen M7.

The operator selects any of the sixth icon display sections 171 (e.g., by operating the fourth dial 48) and selects the candidate function that they want to replace with the new candidate function.

The third category selection unit 173 is a display image that accepts the selection of categories (1st to 9th categories) that classify multiple functions related to the work vehicle 1. The third category selection unit 173 displays multiple approximately rectangular images (category display units 174) in which each category is indicated by an icon 174a. As shown in FIG. 19, in this embodiment, the third category selection unit 173 displays multiple category display units 174 side-by-side in the left-right direction of the screen. The worker selects the category in which the function to be assigned is classified by performing a selection operation (for example, operating the fourth dial 48) on any category display unit 174. This causes the second display device 90B to accept the selection operation of a predetermined category from among the multiple categories.

The third function selection unit 175 is a display image that accepts the selection of a predetermined function from among a plurality of functions classified into a category for which the third category selection unit 173 has accepted a selection operation. The third function selection unit 175 displays a plurality of substantially rectangular images (seventh icon display units 176) each showing a function with an icon 176a. As shown in FIG. 19, in this embodiment, the third function selection unit 175 displays a plurality of seventh icon display units 176 arranged in the left-right direction of the screen. The plurality of seventh icon display units 176 display the third function, sixth function, tenth function, twelfth function, 25th to 28th functions, etc. with icons 176a.

The operator selects the seventh icon display section 176 of the function to be assigned by performing a selection operation (e.g., operating the fourth dial 48) on any seventh icon display section 176. As a result, the second display device 90B accepts the selection operation of a predetermined function from among the multiple functions as a candidate function. The change unit 80b updates (overwrites and saves) the candidate function stored in the storage device 81 by replacing the function corresponding to the selected sixth icon display section 171 with the function corresponding to the selected seventh icon display section 176 as the candidate function.

Note that the fifth change screen M7 shown in FIG. 19 is merely an example, and the screen and the method of assigning candidate functions are not limited to the above-mentioned example.

In the above-described embodiment, both the first function operation device 45 and the second function operation device 46 are physical dial switches, but the first function operation device 45 is not limited to a dial switch as long as at least the second function operation device 46 is a dial switch. For example, the first function operation device 45 may be an operation device that performs a selection operation of multiple functions, and may be composed of one or more tactile switches, or may be other operation devices. For example, if the display device (display screen) 90 is a touch panel, the first function operation device 45 may be a display image that is displayed on the display screen (display device) 90 and accepts a selection operation.

For example, the selection function display unit 150 and the candidate function display unit 151 shown in FIG. 17 also serve as the first function operation device 45. When the selection function display unit 150 (or its vicinity, etc.) is swiped in either the left or right direction, the third change screen M5 displays the function displayed by the candidate function display unit 151 on the selection function display unit 150 in response to the swipe operation, instead of the function displayed on the selection function display unit 150.

In the above embodiment, the case where the operation mode is changed by operating the selector 51 has been described as an example, but the change of the operation mode is not limited to the selection operation by the selector 51. For example, the operation mode may be changed by deforming the operation lever 41 instead of or in addition to the operation of the selector 51, and the operation mode may be changed based on the deformation operation. As a result, even with a single operation lever 41, various controls of the work vehicle 1 can be performed by changing the shape of the switching unit 55. Therefore, the worker does not need to change his grip on the operation lever 41 every time the environment in which the work vehicle 1 is traveling or the work content changes, and the operator can be prevented from operating the wrong switch or lever.

In such a case, the operating lever 41 has a switching section 55, as shown in the modified example in FIG. 20. FIG. 20 shows the operating lever 41 in the modified example as seen from the driver's seat 4.

As shown in FIG. 20, the switching unit 55 is a member that connects the grip portion 41b and the base end 41a. The switching unit 55 switches between a first form 55A in which the angle of the grip portion 41b with respect to the base end 41a (for example, the angle formed by the reference line L3 extending in the extension direction of the base end 41a and the reference line L4 extending in the extension direction of the grip portion 41b shown in FIG. 20) is a first angle θ1, and a second form 55B in which the angle is a second angle θ2 different from the first angle θ1. The second angle θ2 is an angle larger than the first angle θ1. When the switching unit 55 is in the first form 55A, the grip portion 41b is in a state of extending from the switching unit 55 along the extension direction of the base end 41a, and the operating lever 41 extends in a substantially straight line. On the other hand, when the switching part 55 is in the second configuration 55B, the grip part 41b extends from the switching part 55 toward the inside or outside in the width direction, and the operating lever 41 is bent halfway.

More specifically, as shown in FIG. 20, the switching unit 55 has a first bracket 56, a second bracket 57, a pivot shaft 58, and a shape maintaining unit 59, and as shown in FIG. 21, the switching unit 55 has a shape detecting unit 60.

The first bracket 56 is a part provided at the base end of the grip portion 41b. The second bracket 57 is a part provided at the tip of the base end 41a, and supports the first bracket 56 so that it can rotate freely via a rotation shaft 58. The rotation shaft 58 extends in the front-to-rear direction. The first bracket 56 and the second bracket 57 are formed with an insertion hole through which the rotation shaft 58 is inserted, and the grip portion 41b rotates around the rotation shaft 58, thereby changing the angle of the grip portion 41b relative to the base end 41a.

The form maintaining part 59 is a member that maintains the first form 55A and the second form 55B. The form maintaining part 59 has a locking member 59a and is attached to the second bracket 57. The locking member 59a is composed of a locking ball, and by engaging with the locking recess 56a formed in the first bracket 56, the first form 55A and the second form 55B are maintained. In detail, the locking recess 56a is formed at a portion (first recess 56a1) where the locking member 59a abuts on the first bracket 56 when the operation mode is the first form 55A, and at a portion (second recess 56a2) where the locking member 59a abuts on the first bracket 56 when the operation mode is the second form 55B. Therefore, when the operator operates the operating lever 41 to the first form 55A, the locking member 59a engages with the first recess 56a1. Furthermore, when the operator rotates the grip portion 41b around the rotation axis 58 to change from the first configuration 55A to the second configuration 55B, the locking member 59a is released from the first recess 56a1 and engages with the second recess 56a2. This allows the configuration maintaining portion 59 to maintain the first configuration 55A and the second configuration 55B, respectively.

The shape maintaining section 59 only needs to be able to maintain the first shape 55A and the second shape 55B, and its structure is not limited to the structure described above.

The form detection unit 60 is a detection sensor that detects whether the operating lever 41 is in the first form 55A or the second form 55B. The form detection unit 60 is composed of, for example, a limit switch, and detects the position of the grip portion 41b relative to the base end portion 41a to detect whether the operating lever 41 is in the first form 55A or the second form 55B. The form detection unit 60 is connected to the control device 80 and outputs a detection signal to the control device 80. As a result, when the operating lever 41 is in the first form 55A, the control device 80 switches the operating lever 41 to the first mode, and when the operating lever 41 is in the second form 55B, the control device 80 switches the operating lever 41 to the second mode. As a result, the operating lever 41 can change the function of the work vehicle 1 that accepts operation instructions when the switching unit 55 is in the first form 55A and when it is in the second form 55B. In addition, the operation lever 41 can change the function of the work vehicle 1 that accepts operation instructions by swinging the switching unit 55 between the first configuration 55A and the second configuration 55B.

When the operating lever 41 is transformed and the operating mode is switched based on the transformation, the operating lever 41 needs to be able to switch at least between the first and second modes. When switching to other modes such as the third or fourth mode in addition to the first and second modes, the selector 51 can be used to switch between the first and fourth modes and between the second and third modes.

In other words, when the operating lever 41 is in the first form 55A, the operating lever 41 can be switched to the first mode or the fourth mode, and switching between the first mode and the fourth mode is performed based on the operation of the selector 51. On the other hand, when the operating lever 41 is in the second form 55B, the operating lever 41 can be switched to the second mode or the third mode, and switching between the second mode and the third mode is performed based on the operation of the selector 51.

In addition, in this modified example, when the operating lever 41 switches only between the first mode and the second mode, the standard map and the extended map of the third mode in the above-described embodiment may be applied as the standard map and the extended map of the second mode.

Therefore, the operation lever 41 can change the function of the work vehicle 1 that accepts operation instructions by operating the operation switch 42 when the switching unit 55 is in the first form 55A and when the switching unit 55 is in the second form 55B. In addition, as described above, the display unit 43 changes the display form depending on the operation mode, so that the display form is changed when the switching unit 55 is in the first form 55A and when the switching unit 55 is in the second form 55B. More specifically, the display unit 43 changes the color when the switching unit 55 is in the first form 55A and when the switching unit 55 is in the second form 55B.

The above-mentioned operation device 40 of the work vehicle 1, the support device 100 of the work vehicle 1, and the work vehicle 1 provide the following effects.

The operation device 40 of the work vehicle 1 includes an operation lever 41 for operating various functions of the work vehicle 1 and a selector 51 for selecting an operation mode of the operation lever 41. The operation lever 41 changes the function of the work vehicle 1 that accepts operation instructions according to the operation mode selected by the selector 51. According to the above configuration, even with a single operation lever 41, various functions of the work vehicle 1 can be operated by operating the selector 51 to switch the operation mode. This eliminates the need for the worker to change his/her grip on the operation lever 41 every time the environment in which the work vehicle 1 is traveling or the work content changes, and thus prevents the worker from operating the wrong switch or lever. Furthermore, since there is no need to increase the operation lever 41 according to the type of function of the work vehicle 1, the number of operation members on the operation device 40 can be reduced, which not only improves the operability of the operation device 40 as a whole, but also prevents the operation lever 41 from obstructing the worker's view.

The operating lever 41 is supported so as to be freely swingable, and changes the function of the work vehicle 1 that accepts operation instructions by swinging the operating lever 41 depending on the operation mode selected by the selector 51. According to the above configuration, by selecting an operation mode with the selector 51, the function that accepts operation instructions by swinging the operating lever 41 can be changed as desired. This allows the number of operating members on the operating device 40 to be reduced, so not only can sufficient installation space for the operating lever 41 be secured, but interference between the operating members and other operating members can be suppressed, improving the operability of the entire operating device 40.

The multiple operation modes include a first mode for operating at least the work functions related to work among the functions of the work vehicle 1, and a second mode for operating at least the travel functions related to travel among the functions of the work vehicle 1, and in the first mode, the operation lever 41 accepts operation instructions for the work functions by a swing operation, and in the second mode, the operation lever 41 accepts operation instructions for the travel function by a swing operation. According to the above configuration, the worker can use the operation lever 41 to operate the work functions and the travel functions consecutively without having to change hands of the operation lever 41.

The operating lever 41 also has one or more operating switches 42, and changes the functions of the work vehicle 1 that accept operation instructions by operating the operating switch 42 depending on the operation mode switched by the selection operation of the selector 51. According to the above configuration, by operating the selector 51 to switch the operation mode, it is possible to arbitrarily change the functions of the operating lever 41 that accept operation instructions by the multiple operating switches 42. Therefore, there is no need to provide the operating lever 41 with a number of operating switches 42 corresponding to the number of functions of the work vehicle 1, and the operability of the operating lever 41 can be further improved.

The multiple operation modes also include a third mode for operating the traveling function and the work function, and the operation lever 41 accepts operation instructions for the traveling function by swinging in the third mode, and the function of the work vehicle 1 that accepts operation instructions by operating the operation switch 42 in the third mode is different from the function of the work vehicle 1 that accepts operation instructions by operating the operation switch 42 in the second mode. According to the above configuration, when switching between the second mode and the third mode, control of traveling by swinging the operation lever 41 can be performed continuously before and after the switching, while different operations can be operated with the same operation switch 42 by switching between the second mode and the third mode. Therefore, for example, when entering and exiting a field, the content of the work and/or traveling-related operation corresponding to the operation of the operation switch 42 can be changed by switching between the second mode and the second mode while continuing traveling, thereby improving the versatility of the operation lever 41.

The multiple operation modes also include a fourth mode, in which the operation lever 41 does not accept operation instructions for the functions of the work vehicle 1 through swing operation, but accepts operation instructions for the functions of the work vehicle 1 through operation of the operation switch 42. With the above configuration, even if the operator accidentally touches the operation lever 41 when leaving or sitting in the driver's seat 4, and the operation lever 41 is swing-operated, it is possible to prevent the work vehicle 1 from unintentionally traveling and/or performing work.

The operating device 40 of the work vehicle 1 also includes a display unit 43 that changes the display form depending on the operating mode selected by operating the selector 51. With the above configuration, the worker can easily grasp the current operating mode that has been switched by operating the selector 51.

The display unit 43 is also provided on the operating lever 41. With the above configuration, the operator can easily check the display unit 43 when operating the operating lever 41.

The display unit 43 is a lamp that changes color depending on the operation mode selected by operating the selector 51. With the above configuration, the operator can see at a glance the current operation mode switched by operating the selector 51.

The selector 51 is a physical switch. With the above configuration, the worker can grasp the position of the selector 51 and operate it reliably without having to visually check it.

The selector 51 is a display image that is displayed on the display screen (display device) 90 and accepts operations. With the above configuration, the selector 51 is not required to be newly provided, but is already displayed on the display device 90, thereby providing the excellent effects of the above-described operation device 40.

The work vehicle 1 also includes a vehicle body 2, a driver's seat 4 provided in the vehicle body 2, and an operating device 40 provided around the driver's seat 4. With the above configuration, it is possible to realize a work vehicle 1 that can obtain the excellent effects provided by the operating device 40 described above.

The operating device 40 of the work vehicle 1 includes an operating lever 41 for operating various functions of the work vehicle 1 and an operable switching device 53. The operating lever 41 has one or more operating switches 42, and accepts operation instructions for a predetermined standard function among the functions by operating the operating switch 42. When the switching device 53 is operated, instead of the standard function, it accepts operation instructions for an extended function of the work vehicle 1 that is different from the standard function by operating the operating switch 42. According to the above configuration, one operating switch 42 can accept operation instructions for multiple functions in response to the operation of the switching device 53. Therefore, there is no need to provide the operating lever 41 with a number of operating switches 42 corresponding to the number of functions of the work vehicle 1, and the operation of the operating switch 42 can be prevented from becoming complicated, and the operability of the operating lever 41 can be further improved.

The operating lever 41 also accepts operation instructions for the standard function through operation of the operating switch 42 while the switching device 53 is not being operated, and accepts operation instructions for the extended function through operation of the operating switch 42 while the switching device 53 is being operated. With the above configuration, the operating switch 42 accepts operation instructions for the extended function only while the switching device 53 is being operated, which prevents the operator from operating the extended function by mistake.

The operation switch 42 also has a lighting section 42b provided on the operation surface 42a, and the lighting section 42b changes its display form depending on whether the switching device 53 is not being operated or is being operated. With the above configuration, the worker can easily understand whether the function of the operation instruction currently accepted by the operation switch 42 is a standard function or an extended function by checking the lighting section 42b. This makes it possible to prevent the worker from unintentionally operating the standard function or the extended function when, for example, the worker mistakenly operates the switching device 53.

The lighting unit 42b includes a first lighting unit 42b1 provided on one side of the operation surface 42a and indicating the standard function, and a second lighting unit 42b2 provided on the other side of the operation surface 42a and indicating the extended function. When the switch 53 is not operated, the first lighting unit 42b1 is lit and the second lighting unit 42b2 is turned off, and when the switch 53 is operated, the first lighting unit 42b1 is turned off and the second lighting unit 42b2 is lit. With the above configuration, the operator can more easily know whether the operation instruction currently accepted by the operation switch 42 is an operation instruction for the standard function or an operation instruction for the extended function.

The first lighting portion 42b1 and the second lighting portion 42b2 are formed in a shape that follows the inner circumference of the operation surface 42a, and each forms a part or the entire outline of the inner circumference of the operation surface 42a. With the above configuration, by checking the display of the first lighting portion 42b1 and the second lighting portion 42b2, the operator can not only more easily determine whether the function of the operation instruction currently accepted by the operation switch 42 is a standard function or an extended function, but also more easily and reliably recognize the position of the operation switch 42 by the first lighting portion 42b1 and the second lighting portion 42b2.

The operation device 40 of the work vehicle 1 also includes a display unit 43 that displays the operation of the switching device 53 when the switching device 53 is being operated. With the above configuration, the worker can easily understand whether the function of the operation instruction currently accepted by the operation switch 42 is a standard function or an extended function. This makes it possible to prevent the worker from unintentionally operating the standard or extended function when, for example, the worker operates the switching device 53 incorrectly.

The display unit 43 is a lamp that flashes to indicate the operation of the switch 53. With the above configuration, the operator can more easily understand whether the function of the operation instruction currently accepted by the operation switch 42 is a standard function or an extended function.

The operating lever 41 also has a base end 41a that is supported around the driver's seat 4 of the work vehicle 1 so as to be able to swing freely, and a grip portion 41b provided at the tip of the base end 41a, and the multiple operating switches 42 are arranged on the surface of the grip portion 41b that faces the driver's seat 4, and the switching device 53 is arranged on a surface of the grip portion 41b different from the operating switches 42. With the above configuration, the worker can be prevented from operating the switching device 53 by mistake instead of the operating switch 42. This prevents the worker from unintentionally performing the second operation.

The switching device 53 is arranged on the upper or rear surface of the surface on which the multiple operation switches 42 are arranged. This configuration reliably prevents the worker from operating the switching device 53 by mistake, instead of the operation switch 42.

The work vehicle 1 also includes a vehicle body 2, a driver's seat 4 provided in the vehicle body 2, and an operating device 40 provided around the driver's seat 4. With the above configuration, it is possible to realize a work vehicle 1 that can obtain the excellent effects provided by the operating device 40 described above.

The work vehicle 1 also includes a display device 90 that, when the switching device 53 is operated, displays the correspondence between the operation of the operation switch 42 and the contents of the extended function that accepts an operation instruction by the operation of the operation switch 42. With the above configuration, the worker can easily understand the contents of the extended function, and can also easily understand whether the function of the operation instruction currently accepted by the operation switch 42 is a standard function or an extended function.

The support device 100 of the work vehicle 1 includes a control device 80 that controls a plurality of functions related to the work vehicle 1, a first function operation device 45 for selecting a plurality of functions, and a second function operation device 46 for changing a control parameter of the function selected by the first function operation device 45, and the second function operation device 46 is a dial switch that changes the control parameter by a rotation operation. According to the above configuration, the worker can quickly change the parameter of the function by using the first function operation device 45 and the second function operation device 46 appropriately. In addition, since the second function operation device 46 is a dial switch, the worker can easily operate the second function operation device 46 without visually checking it, even while the work vehicle 1 is traveling.

The control device 80 also has a change unit 80b that changes the options of the functions that can be selected and operated by the first function operation device 45 from among the multiple functions. According to the above configuration, the worker can arbitrarily change the options of the functions that can be selected and operated by the first function operation device 45. Therefore, the worker can quickly select and operate a function by the first function operation device 45.

The support device 100 of the work vehicle 1 also includes a display device 90 that displays functions that can be selected and operated with the first function operation device 45 from among the multiple functions, and the display device 90 displays the one function selected and operated with the first function operation device 45 in a different display form from the other functions. With the above configuration, the worker can easily grasp the function selected and operated with the first function operation device 45 and the other selectable functions.

The support device 100 of the work vehicle 1 is also equipped with a display device 90 that displays the control parameters that have been changed using the second function operation device 46. With the above configuration, the worker can easily understand the limiting parameters after the change by checking the control parameters displayed on the display device 90.

The first function operating device 45 is a dial switch that selects a function by rotating it. With the above configuration, the worker can easily operate the first function operating device 45 without visually checking it, even while the work vehicle 1 is traveling.

The axial direction of the rotation axis L1 of the first function operating device 45 is different from the axial direction of the rotation axis L2 of the second function operating device 46. With the above configuration, the worker can easily distinguish which operating device 45, 46 should be operated to select and operate a function and to operate a parameter. This allows for quick operation of the parameters of the functions of the work vehicle 1.

The axial direction of the rotation axis L1 of the first function operating device 45 is perpendicular to the axial direction of the rotation axis L2 of the second function operating device 46. With the above configuration, the operator can more reliably distinguish which operating device 45, 46 should be operated to select and operate a function and to operate a parameter.

The first function operation tool 45 is a display image that is displayed on the display screen 90 and accepts a selection operation. With the above configuration, the worker can intuitively select and operate the function options.

The work vehicle 1 also includes a vehicle body 2, a driver's seat 4 provided in the vehicle body 2, and an assistance device 100. With the above configuration, it is possible to realize a work vehicle 1 that can obtain the excellent effects provided by the assistance device 100 described above.

The support device 100 of the work vehicle 1 also includes a control device 80 that controls multiple functions related to the work vehicle 1, and an operating tool 49 for operating a specific function among the multiple functions. The control device 80 has an update unit 80a that updates a function assigned to the operating tool 49 to a different function, and the operating tool 49 has a first display lamp 49b1 that changes the display form depending on the category to which the function updated by the update unit 80a belongs. With the above configuration, the worker can easily grasp the classification (category) of the function updated by the update unit 80a. This makes it possible to suppress erroneous operations even when the operating tool 49 updates a function that accepts operation instructions.

The first indicator lamp 49b1 lights up in different colors depending on the category to which the function updated by the update unit 80a belongs. With the above configuration, the worker can see at a glance the category of the function updated by the update unit 80a.

The operating tool 49 is assigned a predetermined initial function from among a plurality of functions, and the update unit 80a updates the function assigned to the operating tool 49 to an updated function from among the plurality of functions that is different from the initial function, and the first display lamp 49b1 changes its display form depending on the category to which the updated function updated by the update unit 80a belongs. According to the above configuration, the worker can easily know whether the function for which the operating tool 49 accepts operational instructions has been updated by the update unit 80a by checking the display of the first display lamp 49b1.

The operating tool 49 is also provided with an icon indicating the initial function. With the above configuration, when the operating tool 49 accepts the operation of the initial function, the operator can easily understand the content of the function by checking the display of the first indicator lamp 49b1 and the icon.

In addition, the operating tool 49 has a second indicator lamp 49b2 in addition to the first indicator lamp 49b1, and the second indicator lamp 49b2 changes its display mode depending on whether the function assigned to the operating tool 49 is enabled or disabled. With the above configuration, the operator can easily know whether the function is enabled or disabled by checking the second indicator lamp 49b2. Furthermore, the first indicator lamp 49b1 and the second indicator lamp 49b2 are arranged in positions surrounding the icon. With the above configuration, the position of the operating tool 49 can be easily recognized by the first indicator lamp 49b1 and the second indicator lamp 49b2.

The operating tool 49 also has a third lamp that is turned on in addition to the first and second indicator lamps 49b1 and 49b2. The first, second, and third indicator lamps 49b1, 49b2, and 49b3 are formed in a shape that follows the inner circumference of the operating surface 49a of the operating tool 49, and each form part or all of the outline of the inner circumference of the operating surface 49a. With the above configuration, not only can the operator easily know whether the function is enabled or disabled by checking the second indicator lamp 49b2, but the first, second, and third indicator lamps 49b1, 49b2, and 49b3 can also more easily and reliably recognize the position of the operating tool 49.

The work vehicle 1 also includes a vehicle body 2, a driver's seat 4 provided in the vehicle body 2, and an assistance device 100, and the operating tool 49 is provided around the driver's seat 4. With the above configuration, it is possible to realize a work vehicle 1 that can obtain the excellent effects provided by the assistance device 100 described above.

The operating device 40 of the work vehicle 1 is equipped with an operating lever 41 for operating various functions of the work vehicle 1, and the operating lever 41 has a base end 41a supported around the driver's seat 4 of the work vehicle 1 so as to be able to swing, a grip portion 41b provided at the tip of the base end 41a, and a switching portion 55 that connects the grip portion 41b and the base end 41a and switches between a first form 55A in which the angle of the grip portion 41b relative to the base end 41a is a first angle θ1 and a second form 55B in which the angle is a second angle θ2 different from the first angle θ1, and changes the function of the work vehicle 1 that accepts operation instructions when the switching portion 55 is in the first form 55A and when it is in the second form 55B. According to the above configuration, even with a single operating lever 41, various controls of the work vehicle 1 can be performed by changing the form of the switching portion 55. This eliminates the need for the worker to change his/her grip on the operating lever 41 each time the environment in which the work vehicle 1 is traveling or the work content changes, and prevents the worker from operating the wrong lever or switch. Furthermore, since there is no need to increase the number of operating levers 41 according to the type of function of the work vehicle 1, the number of operating members on the operating device 40 can be reduced, which not only improves the operability of the operating device 40 as a whole, but also prevents the operating lever 41 from obstructing the worker's field of vision.

The operating lever 41 is supported so as to be freely swingable, and changes the function of the work vehicle 1 that accepts operational instructions by swinging the operating lever 41 when the switching unit 55 is in the first configuration 55A and the second configuration 55B. According to the above configuration, by changing the configuration of the operating lever 41, the function that accepts operational instructions by swinging the operating lever 41 can be changed as desired. Therefore, although the operating lever 41 that can be swingable requires a relatively wide operating range, the number of operating members on the operating device 40 can be reduced, interference between the operating members and other operating members can be suppressed, and the operability of the entire operating device 40 can be improved.

When the switching unit 55 is in the first configuration 55A, the operating lever 41 is switched to a first mode for operating at least the work functions related to work among the functions of the work vehicle 1, and when the switching unit 55 is in the second configuration 55B, the operating lever 41 is switched to a second mode for operating at least the travel functions related to travel among the functions of the work vehicle 1, and in the first mode, the operating lever 41 accepts operation instructions for the work functions by a swing operation, and in the second mode, the operating lever 41 accepts operation instructions for the travel function by a swing operation. With the above configuration, the worker can use the operating lever 41 to operate the work functions and the travel functions consecutively without having to change hands of the operating lever 41.

The second angle θ2 is greater than the first angle θ1, and when the switching portion 55 is in the first configuration 55A, the grip portion 41b extends from the switching portion 55 along the extension direction of the base end portion 41a, and when the switching portion 55 is in the second configuration 55B, the grip portion 41b extends from the switching portion 55 toward the inside or outside in the width direction. With the above configuration, the operator can stably grip the grip portion 41b when operating the traveling function, and can perform precise movements using the wrist when operating the work function.

The operating lever 41 also has one or more operating switches 42, and changes the function of the work vehicle 1 that accepts operational instructions by operating the operating switch 42 when the switching unit 55 is in the first configuration 55A and when the switching unit 55 is in the second configuration 55B. According to the above configuration, by changing the configuration of the operating lever 41, the functions of the operating lever 41 that accept operational instructions through the multiple operating switches 42 can be changed arbitrarily. Therefore, there is no need to provide the operating lever 41 with a number of operating switches 42 corresponding to the number of functions of the work vehicle 1, and the operability of the operating lever 41 can be further improved.

The operating lever 41 is also provided with a display unit 43 that changes the display mode when the switching unit 55 is in the first mode 55A and when the switching unit 55 is in the second mode 55B. With the above configuration, the operator can easily grasp the state of the operating lever 41 by the display unit 43 in addition to the mode of the switching unit 55.

The display unit 43 is a lamp that changes color when the switching unit 55 is in the first configuration 55A and when the switching unit 55 is in the second configuration 55B. With the above configuration, the operator can at a glance grasp the state of the operating lever 41 from the display unit 43 in addition to the configuration of the switching unit 55.

The work vehicle 1 also includes a vehicle body 2, a driver's seat 4 provided in the vehicle body 2, and an operating device 40 provided around the driver's seat 4. With the above configuration, it is possible to realize a work vehicle 1 that can obtain the excellent effects provided by the operating device 40 described above.

The present invention has been described above, but the embodiments disclosed herein should be considered to be illustrative and not restrictive in all respects. The scope of the present invention is indicated by the claims, not the above description, and is intended to include all modifications within the meaning and scope of the claims.

1. Work vehicle (tractor)
2 Vehicle body 4 Driver's seat 49 Operation tool 49a Operation surface 49b1 First indicator lamp 49b2 Second indicator lamp 49b3 Third indicator lamp 80 Control device 80a Update unit 100 Support device

Claims (8)

A control device that controls a plurality of functions related to the work vehicle;
An operating tool for operating a predetermined function among the plurality of functions;
Equipped with
the control device has an update unit that updates a function assigned to the operating tool to a different function;
The operating tool has a first indicator lamp that changes its display form depending on the category to which the function updated by the update unit belongs. The work vehicle support device according to claim 1, wherein the first indicator lamp lights up in a different color depending on the category to which the function updated by the update unit belongs. A predetermined initial function is assigned to the operating tool in advance among the plurality of functions,
The update unit updates the function assigned to the operating tool to an updated function that is different from the initial function among the plurality of functions,
The support device for a work vehicle according to claim 1 , wherein the first display lamp changes a display form depending on a category to which an update function updated by the update unit belongs. The support device for a work vehicle according to claim 3, wherein the operating tool is provided with an icon indicating the initial function. The operating tool has a second indicator lamp in addition to the first indicator lamp,
5. The support device for a work vehicle according to claim 4, wherein the second display lamp changes its display form depending on whether the function assigned to the operating tool is enabled or disabled. The work vehicle support device according to claim 5, wherein the first indicator lamp and the second indicator lamp are arranged in positions surrounding the icon. the operating tool has a third lamp that is turned on in addition to the first indicator lamp and the second indicator lamp,
The support device for a work vehicle as described in claim 6, wherein the first indicator lamp, the second indicator lamp, and the third indicator lamp are formed in a shape that follows the inner circumference of the operating surface of the operating tool, and each form a part or all of the outline of the inner circumference of the operating surface. The car body and
A driver's seat provided in the vehicle body;
A support device according to any one of claims 1 to 7,
Equipped with
The operating tool is provided around the driver's seat of the work vehicle.