Work vehicles

Abstract

This technology provides an improved convenience for work vehicles that allow the setting of maximum vehicle speed and maximum engine speed. [Solution] An exemplary work vehicle is a work vehicle equipped with a display device. The display device is provided capable of displaying a setting confirmation screen that displays a maximum vehicle speed display area for displaying a maximum vehicle speed setting value and a maximum engine speed display area for displaying a maximum engine speed setting value side by side. The setting confirmation screen includes a maximum vehicle speed operation area displayed side by side with the maximum vehicle speed display area and allowing the maximum vehicle speed setting value to be changed, and a maximum engine speed operation area displayed side by side with the maximum engine speed display area and allowing the maximum engine speed setting value to be changed.

Description

Technical Field

[0001] The present invention relates to a work vehicle.

Background Art

[0002] Patent Document 1 discloses that in a tractor, the target engine speed when the engine speed change operation member is operated to the maximum can be set by an engine speed upper limit setting member. Also, Patent Document 1 discloses that in a tractor, the maximum speed value when the main transmission operation member is operated to the maximum can be set by a maximum speed setting member.

[0003] Furthermore, Patent Document 1 discloses that the maximum speed setting member and the engine speed upper limit setting member may be constituted by a common member. And in this case, a configuration including an engine speed - vehicle speed change switch that acts as both the engine speed upper limit setting member and the maximum speed setting member, and an engine speed - vehicle speed setting dial is disclosed.

Prior Art Documents

Patent Documents

[0004]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0005] By the way, among work vehicles, there are work vehicles in which a plurality of traveling modes determined by combinations of an engine speed upper limit value set by an engine speed upper limit setting member and a maximum speed value set by a maximum speed setting member are prepared. In such work vehicles, it is necessary to set the engine speed upper limit value and the maximum speed value for each traveling mode. In this case, there is a concern that the setting work performed by operation members such as buttons and dials may become complicated or difficult to understand.

[0006] The present invention aims to provide a technology that can improve the convenience of work vehicles in which the maximum vehicle speed and maximum engine speed can be set. [Means for solving the problem]

[0007] An exemplary work vehicle of the present invention is a work vehicle equipped with a display device. The display device is provided capable of displaying a setting confirmation screen that displays side by side a maximum vehicle speed display area that displays a maximum vehicle speed setting value and a maximum engine speed display area that displays a maximum engine speed setting value. The setting confirmation screen includes a maximum vehicle speed operation area that is displayed side by side with the maximum vehicle speed display area and allows the maximum vehicle speed setting value to be changed, and a maximum engine speed operation area that is displayed side by side with the maximum engine speed display area and allows the maximum engine speed setting value to be changed. [Effects of the Invention]

[0008] According to an exemplary version of the present invention, the convenience of a work vehicle in which the maximum vehicle speed and maximum engine speed can be set can be improved. [Brief explanation of the drawing]

[0009] [Figure 1] Side view showing the general configuration of the work vehicle. [Figure 2] Diagram illustrating the control system of a work vehicle. [Figure 3] Schematic diagram showing the configuration of the meter panel. [Figure 4] Block diagram showing the functions of the touch panel control unit included in the touch panel. [Figure 5] Plan view showing the general layout around the driver's seat. [Figure 6] Perspective view showing the schematic configuration of the main gear shift lever. [Figure 7] A schematic diagram illustrating interrupt display on the center display. [Figure 8] Diagram showing an example of a screen displayed on a touch panel. [Figure 9]A schematic diagram illustrating screen transition operations on a touch panel. [Figure 10] This figure shows an example of a confirmation screen that appears before executing A / B automatic switching. [Figure 11] This diagram shows a setting confirmation screen related to a modified example displayed on a touch panel. [Figure 12] This diagram illustrates the configuration of the reconfirmation screen that appears when the option to not perform a speed increase check is selected. [Modes for carrying out the invention]

[0010] Embodiments of the present invention will be described with reference to the drawings. In the drawings, the same or corresponding parts are denoted by the same reference numerals, and descriptions will not be repeated unless they require further explanation.

[0011] Furthermore, in this specification, directions are defined as follows: First, the direction in which a work vehicle travels in a straight line is defined as the front-rear direction, with the steering wheel being on the front side relative to the driver's seat of the work vehicle. Also, the right side is defined as the right and the left side as viewed from the perspective of an operator sitting in the driver's seat facing forward, and the left side is defined as the left-right direction perpendicular to the front-rear direction. In addition, the direction perpendicular to both the front-rear and left-right directions is defined as the up-down direction, with gravity being the direction of gravity being down and the opposite direction being up. The above directions are merely descriptive names and are not intended to limit actual positional relationships or directions.

[0012] <1. Overview of work vehicles> Figure 1 is a side view showing a schematic configuration of a work vehicle 1 according to an embodiment of the present invention. More specifically, Figure 1 is a left side view. As shown in Figure 1, the work vehicle 1 comprises a vehicle body 11 and a work machine 12.

[0013] The vehicle body part 11 constitutes the main part of the work vehicle 1 and can travel on the work site 200. The work implement 12 is provided on the work vehicle 1 by being mounted on the vehicle body part 11 or the like. The work vehicle 1 performs work travel using the work implement 12. The work vehicle 1 performs work travel at the work site 200. In the present embodiment, the work site 200 is, for example, a farm field. That is, the work vehicle 1 is a farm work vehicle that performs ground work in the farm field 200.

[0014] In addition, the work vehicle 1 may travel on a road such as a public road in order to move to a place other than the work site 200. That is, the place where the work vehicle 1 travels is not limited to the work site 200.

[0015] Also, in the present embodiment, the work implement 12 is mounted on the rear part of the vehicle body part 11. The work vehicle 1 is a tractor that pulls the work implement 12 by the vehicle body part 11. However, the work implement 12 may be configured to be mounted on the front part of the vehicle body part 11. That is, the work vehicle of the present invention may be configured to include a work implement at the front part of the vehicle body. The work vehicle of the present invention may be a work vehicle for agricultural work other than a tractor, or a work vehicle for civil engineering work or construction work.

[0016] The vehicle body part 11 includes a base part 13 and a pair of left and right traveling parts 14 that support the base part 13 and are arranged at intervals in the left - right direction. Each of the left and right traveling parts 14 includes a front wheel 14a and a rear wheel 14b. That is, the front wheel 14a includes a left front wheel 14a and a right front wheel 14a. Also, the rear wheel 14b includes a left rear wheel 14b and a right rear wheel 14b.

[0017] The front wheels 14a and the rear wheels 14b are provided so as to be able to transmit power from an engine 15 disposed in front of the base part 13. By transmitting power from the engine 15 to the front wheels 14a and the rear wheels 14b, the vehicle body part 11 can travel on the farm field 200 or the like. In the present embodiment, the engine 15 is a diesel engine, but is not limited thereto, and the engine 15 may be a gasoline engine, a hydrogen gas engine, or the like.

[0018] The base unit 13 is provided with a driver's compartment 16 in which the operator (user) sits. The driver's compartment 16 is located behind the engine 15. The driver's compartment 16 is provided with a driver's seat 16a in which the operator sits, a steering wheel 16b located in front of the driver's seat 16a that enables the operator to steer the work vehicle 1, and a number of control devices (not shown in Figure 1) that enable the operator to perform various operations.

[0019] The multiple operating devices include, for example, a main gear lever and a sub-gear lever. The main gear lever is an operating device for continuously changing (arbitrarily changing) the travel speed of the work vehicle 1. The sub-gear lever is an operating device for specifying one of two speeds, for example, a low speed and a high speed. The operator specifies a rough speed with the sub-gear lever, and then specifies a finer speed using the main gear lever. The multiple operating devices also include accelerator operating members (pedals, levers, etc.) that enable the operation of changing the rotational speed of the engine 15.

[0020] The work implement 12 is connected to the rear of the base unit 13 via a coupling mechanism 17. In this embodiment, the work implement 12 is connected to the base unit 13 so as to be able to move up and down. A PTO shaft 18 for outputting power generated by the engine 15 to the work implement 12 is located at the rear of the base unit 13. Power from the engine 15 is transmitted to the PTO shaft 18 via a transmission 19. Note that the power source for driving the work implement 12 may be provided separately from the engine 15 for driving the vehicle body 11. This separately provided power source may be a motor or the like.

[0021] In this embodiment, the implement 12 is a rotary tiller. The ground work performed by the work vehicle 1 is tilling. However, the implement 12 is not limited to a rotary tiller; it may also be a plow, harvester, harrow, puddling machine, pesticide sprayer, fertilizer spreader, etc. Furthermore, the work vehicle 1 may be equipped with interchangeable implements 12 of multiple types.

[0022] Figure 2 is a diagram illustrating the control system of a work vehicle 1 according to an embodiment of the present invention. In Figure 2, only the components necessary to explain the features of the work vehicle 1 according to the embodiment of the present invention are shown, and descriptions of other general components are omitted. As shown in Figure 2, the work vehicle 1 is equipped with a control device 2.

[0023] The control device 2 is a computer device comprising, for example, an arithmetic unit, an input / output unit (neither of which are shown), and a storage unit 21. The arithmetic unit is an integrated circuit such as a processor or microprocessor. The storage unit 21 is a main memory device such as ROM (Read Only Memory) and RAM (Random Access Memory). The storage unit 21 may further include an auxiliary storage device such as an HDD (Hard Disk Drive) or SSD (Solid State Drive). Various programs and data are stored in the storage unit 21. The arithmetic unit reads various programs from the storage unit 21 and performs arithmetic processing according to the programs.

[0024] In this embodiment, the control device 2 can be operated as various functional units through the cooperation of the above-described hardware and software. As shown in Figure 2, the various functional units include a travel mode control unit 22, a travel control unit 23, a work equipment control unit 24, and a display control unit 25. Details of each functional unit 22 to 25 will be described later.

[0025] In this embodiment, each of the functional units 22-25 of the control device 2 is implemented by software, i.e., by the arithmetic unit executing arithmetic processing according to a program. However, this is an example, and the functions of the functional units may be implemented by other methods. At least a portion of each of the functional units 22-25 may be implemented using, for example, an ASIC (Application Specific Integrated Circuit) or an FPGA (Field Programmable Gate Array). In other words, at least a portion of each of the functional units 22-25 may be implemented by hardware using a dedicated IC or the like. Furthermore, at least a portion of each of the functional units 22-25 may be implemented using a combination of software and hardware. Also, each of the functional units 22-25 is a conceptual component. The function performed by one component may be distributed among multiple components. Furthermore, the functions of multiple components may be integrated into a single component.

[0026] Furthermore, the control device 2 may consist of a single piece of hardware, or it may consist of multiple pieces of hardware that can communicate with each other. For example, the work vehicle 1 may be equipped with a remote control device (not shown) that enables remote operation by an operator located away from the vehicle body 11. In such a case, the control device 2 may be configured to be located only in the vehicle body 11, or it may be configured to be located separately on the vehicle body 11 side and the remote control device side. The remote control device is a device that can communicate with the vehicle body 11, and may be, for example, a tablet terminal, smartphone, laptop computer, or remote control.

[0027] Furthermore, the control device 2 may be configured to communicate with the server device via a network such as the Internet. In such a case, some of the functions of the control device 2 may be implemented by the server device. Also, some of the information stored in the storage unit 21 may be stored in the server device.

[0028] As shown in Figure 2, the work vehicle 1 includes, in addition to the control device 2, elements 3 to 5 that are directly or indirectly connected to the control device 2. These elements 3 to 5 and the control device 2 may be connected, for example, by wire or wireless. Alternatively, these elements 3 to 5 may be connected by wire or wireless to a device that can communicate with the control device 2 (such as the remote control device or server device mentioned above), and indirectly connected to the control device 2 via the communication device.

[0029] Sensor 3 detects information related to the work vehicle 1 and outputs the detected information to the control device 2. In detail, multiple types of sensors 3 are mounted on the work vehicle 1. Each of the multiple types of sensors 3 outputs the detected information to the control device 2. Sensor 3 is mounted, for example, on the vehicle body 11 or the work machine 12. In some cases, sensor 3 may be provided on a device that can be used at a location away from the vehicle body 11 (such as the remote control device mentioned above). The multiple types of sensors 3 include, for example, a speed sensor that detects the speed of the work vehicle 1, a steering angle sensor that detects the steering angle using the steering wheel 16b, a GNSS (Global Navigation Satellite System) sensor that detects the position of the work vehicle 1, a sensor that detects the rotational speed of the engine 15, an operating position detection sensor that detects the operating position of the accelerator operating member, and lever position sensors that detect the position of the main transmission lever and sub-transmission lever.

[0030] The operation unit 4 enables the operator to issue commands to the control device 2. In this embodiment, the operation unit 4 includes a plurality of operating devices. The operation unit 4 is provided, for example, on the vehicle body 11. However, if the work vehicle 1 is configured to include a remote control device, at least some of the operating devices constituting the operation unit 4 may be included in the remote control device. The operation unit 4 may be, for example, buttons, levers, dials, or touch panels.

[0031] As shown in Figure 2, in this embodiment, the operation unit 4 includes a touch panel TP. The touch panel TP is also included in the display unit 5, as it provides both input and display functions. Further details about the touch panel TP will be described later. In this embodiment, the operation unit 4 also includes an A / B selector switch 41, an engine speed / vehicle speed selector switch 42, and an engine speed / vehicle speed setting dial 43. Details of the A / B selector switch 41, engine speed / vehicle speed selector switch 42, and engine speed / vehicle speed setting dial 43 will also be described later.

[0032] The display unit 5 displays information as appropriate in response to commands from the control device 2. In this embodiment, the display unit 5 includes a plurality of display devices. The display unit 5 is provided, for example, on the vehicle body 11. However, if the work vehicle 1 is configured to include a remote control device, at least some of the display devices constituting the display unit 5 may be included in the remote control device.

[0033] In this embodiment, the display unit 5 includes a meter panel 51 and a touch panel TP.

[0034] Figure 3 is a schematic diagram showing the configuration of the meter panel 51. The meter panel 51 is located in front of the steering wheel 16b of the driver's unit 16. As shown in Figure 3, the information displayed on the meter panel 51 includes a speedometer 51a, a fuel meter 51b, and a water temperature meter 51c. The meter panel 51 also includes a center display 51d, which is composed of a liquid crystal display or the like. The center display 51d displays various information related to the work vehicle 1. For example, the center display 51d displays the engine load rate, hour meter, trip meter, etc. In addition, the center display 51d displays the set values ​​for the maximum vehicle speed and maximum engine speed of the work vehicle 1 as an interruption. This point will be described later.

[0035] The touch panel TP is positioned, for example, around the driver's seat 16a. The operator can use the touch panel TP to check and input various settings related to the work vehicle 1. In this embodiment, the touch panel TP can display and change the set values ​​for the work vehicle 1's maximum vehicle speed and maximum engine speed (maximum engine rotation speed). Details of this will be described later.

[0036] Figure 4 is a block diagram illustrating the functions of the touch panel control unit TPC provided by the touch panel TP. The touch panel control unit TPC is a computer device equipped with an arithmetic unit consisting of a processor and the like. The functions of the touch panel control unit TPC are realized by the processor executing arithmetic processing according to a program. As shown in Figure 4, the touch panel control unit TPC comprises a reception unit TP-1, a display processing unit TP-2, and a transmission unit TP-3 as functional units.

[0037] The reception unit TP-1 receives touch operations from the operator on the touch panel TP. The display processing unit TP-2 performs display processing in response to the operator's touch operations and in response to instructions from the control device 2. The transmission unit TP-3 transmits the content of the instructions (instruction information) from the operator's touch operations to the control device 2.

[0038] The touch panel TP may be installed in the vehicle body 11, or it may be incorporated into a portable device that can be brought into or taken out of the vehicle body 11. The portable device may be, for example, the remote control device described above. Furthermore, the functions realized by the touch panel TP of this embodiment may be realized by a combination of input devices and display devices that are configured separately.

[0039] Returning to Figure 2, we will now explain the overview of the functions of the control device 2.

[0040] The driving mode control unit 22 performs control processing for multiple driving modes, each having a different combination of the maximum vehicle speed setting and the maximum engine speed setting for the work vehicle 1. More specifically, the driving mode control unit 22 controls the switching between the multiple existing driving modes. In other words, the work vehicle 1 is equipped with the ability to set multiple driving modes, each having a different combination of the maximum vehicle speed setting and the maximum engine speed setting. The driving mode control unit 22 executes the driving mode switching process based on instructions from the operator, or automatically if automatic switching is set.

[0041] In this embodiment, the multiple travel modes consist of A mode (first mode) and B mode (second mode). The operator can, for example, use A mode for work and B mode for turning, or use A mode for rotary work and B mode for plowing. The travel mode control unit 22 executes the process of switching from A mode to B mode and from B mode to A mode based on instructions from the operator or automatically.

[0042] The travel control unit 23 controls the travel system of the work vehicle 1. For example, the travel control unit 23 controls the travel of the work vehicle 1 according to the travel mode determined by the control operation of the travel mode control unit 22.

[0043] The driving control unit 23 controls the operation of the transmission 19 so that the speed (vehicle speed) of the work vehicle 1 is the speed corresponding to the operating position of the main shift lever. At this time, the driving control unit 23 controls the operation so that the vehicle speed when the main shift lever is fully operated is limited to the maximum vehicle speed corresponding to the set driving mode. In addition, the driving control unit 23 controls the operation of the engine 15 so that the output rotational speed (output rotational speed) of the engine 15 is the rotational speed corresponding to the operating position of the accelerator operating member. At this time, the driving control unit 23 controls the operation so that the target engine rotational speed (target engine rotational speed) when the accelerator operating member is fully operated is limited to the maximum engine rotational speed (maximum engine rotational speed) corresponding to the set driving mode.

[0044] Furthermore, the instruction information such as speed and steering used by the driving control unit 23 may be obtained by the operator operating (manually operating) the control devices (steering wheel, levers, pedals, etc.) provided on the driving unit 16. However, if the work vehicle 1 is equipped with an automatic driving function, the instruction information such as speed and steering used by the driving control unit 23 may be information calculated by the control device 2 using information obtained from the sensor 3.

[0045] The work equipment control unit 24 controls the work system of the work vehicle 1 according to the input operation information related to the work equipment 12. This control of the work system includes, for example, lifting and lowering control of the work equipment 12 and switching control of power transmission to the work equipment 12 using the PTO power transmission unit. The operation information related to the work equipment 12 may be obtained by the operator operating (manually operating) the operating tools (levers, pedals, etc.) provided on the driver's unit 16. However, if the work vehicle 1 is equipped with an automatic driving function including automatic control of the work equipment 12, the operation information related to the work equipment 12 may be information obtained by the control device 2 in response to information from the sensor 3.

[0046] The display control unit 25 controls the display unit 5 according to information obtained from the sensor 3 and the operation unit 4, as well as information obtained from other control units 22 to 24. Specifically, the display control unit 25 controls the display of the meter panel 51 and the touch panel TP.

[0047] <2. Setting the maximum vehicle speed and maximum engine speed> Next, we will describe in detail the matters related to setting the maximum vehicle speed and maximum engine speed in the work vehicle 1 of this embodiment. In this embodiment, the maximum vehicle speed and maximum engine speed can be set using the display device provided in the work vehicle 1 and the operating member located to the side of the driver's seat 16a of the work vehicle 1. These will be described in order below.

[0048] [2-1. Configurations utilizing operating components] As described above, the work vehicle 1 of this embodiment is equipped with an operating member that allows the maximum vehicle speed setting value and the maximum engine speed setting value to be changed. More specifically, the operating member is composed of a plurality of operating members. These plurality of operating members consist of an A / B changeover switch 41, an engine speed / vehicle speed changeover switch 42, and an engine speed / vehicle speed setting dial 43 (see Figure 2 for all of these).

[0049] Figure 5 is a plan view showing the schematic configuration around the driver's seat 16a. As shown in Figure 5, an armrest 16c is provided on the right side of the driver's seat 16a. A main gear shift lever 16d is provided at the front end of the armrest 16c. Figure 6 is a perspective view showing the schematic configuration of the main gear shift lever 16d.

[0050] As shown in Figures 5 and 6, the A / B selector switch 41 is located on the right side of the main transmission lever 16d. The engine speed / vehicle speed selector switch 42 and the engine speed / vehicle speed setting dial 43 are located on the upper front surface of the armrest 16c. The engine speed / vehicle speed selector switch 42 and the engine speed / vehicle speed setting dial 43 are positioned behind the main transmission lever 16d, with the engine speed / vehicle speed setting dial 43 in front and the engine speed / vehicle speed selector switch 42 behind. As can be seen from Figures 5 and 6, the operating members 41-43 that allow the setting of the maximum vehicle speed and the setting of the maximum engine speed are located to the side (specifically to the right) of the driver's seat 16a. The operating members 41-43 that allow the setting of the maximum vehicle speed and the setting of the maximum engine speed are located in a position that is easy to operate even while the work vehicle 1 is in operation.

[0051] The A / B selector switch 41 is a button-type switch (push switch) that allows switching between A mode and B mode by pressing it in the left or right direction. When the A / B selector switch 41 is pressed while the driving mode of the work vehicle 1 is set to A mode, the driving mode control unit 22 switches from A mode to B mode. Conversely, when the A / B selector switch 41 is pressed while the driving mode of the work vehicle 1 is set to B mode, the driving mode control unit 22 switches from B mode to A mode.

[0052] The engine speed / vehicle speed selector switch 42 is a seesaw switch that allows the user to select whether to change the engine speed or vehicle speed setting. When the engine speed / vehicle speed selector switch 42 is tilted to one side in the left-right direction, the maximum vehicle speed setting can be changed, and when the engine speed / vehicle speed selector switch 42 is tilted to the other side in the left-right direction, the maximum engine speed setting can be changed.

[0053] The engine speed / vehicle speed setting dial 43 is a dial-type operating component used to adjust the engine speed or vehicle speed to the desired upper limit. The setting value can be changed by rotating the engine speed / vehicle speed setting dial 43. For example, rotating the engine speed / vehicle speed setting dial 43 clockwise increases the upper limit, and rotating the engine speed / vehicle speed setting dial 43 counterclockwise decreases the upper limit. The upper limit for engine speed corresponds to the maximum engine speed mentioned above, and the upper limit for vehicle speed corresponds to the maximum vehicle speed mentioned above.

[0054] More specifically, the engine speed / vehicle speed setting dial 43 allows you to change the upper limit of the engine speed / vehicle speed that is selected as the target for modification by the engine speed / vehicle speed selector switch 42, among the engine speed / vehicle speed of the driving mode selected by the A / B selector switch 41. For example, if mode B is selected by the A / B selector switch 41 and engine speed is selected as the target for modification by the engine speed / vehicle speed selector switch 42, you can change the upper limit of the engine speed (maximum engine speed) in mode B by rotating the engine speed / vehicle speed setting dial 43.

[0055] In this embodiment, when any of the three operating members 41 to 43 is operated, the set values ​​for the maximum vehicle speed and maximum engine speed are displayed as an interruption on the center display 51d (see Figure 3) included in the meter panel 51. Here, an interruption display refers to a display that appears temporarily in place of the normal display. When an interruption display is displayed, if none of the operating members 41 to 43 are operated for a certain period of time or longer, the interruption display will end. When the interruption display ends, the display on the center display 51d returns to the normal display state (normal display).

[0056] Figure 7 is a schematic diagram illustrating the interrupt display on the center display 51d. In Figure 7, "A" refers to A mode, and "B" refers to B mode. Next to the "A" and "B" arranged vertically, from left to right, are the set values ​​for maximum vehicle speed and maximum engine speed. The set values ​​next to "A" are the currently set maximum vehicle speed and maximum engine speed in A mode. The set values ​​next to "B" are the currently set maximum vehicle speed and maximum engine speed in B mode.

[0057] In the interrupt display on the center display 51d, the mode currently selected for the work vehicle 1 (driving mode) is displayed in white text on a black background. On the other hand, the mode not currently selected for the work vehicle 1 is displayed in black text on a white background. Note that this display format is an example, and any other display format is acceptable as long as it makes it easy for the operator to recognize the currently selected mode. In this embodiment, considering that the background color of the center display 51d is white, the display of the currently selected mode is shown in white text on a black background to make the display of the currently selected mode stand out.

[0058] In the example shown in Figure 7, the operator can recognize that A mode is currently selected by looking at the center display 51d. With A mode selected, the operator selects the vehicle speed as the target for switching by tilting the engine speed / vehicle speed selector switch 42 to one side. This allows the operator to change the maximum vehicle speed in A mode from 20 km / h to another value by rotating the engine speed / vehicle speed setting dial 43. Since the change in the maximum vehicle speed setting is reflected on the center display 51d, the operator can set the desired maximum vehicle speed while looking at the center display 51d. Also, with A mode selected, the operator selects the engine speed / vehicle speed selector switch 42 to the other side. This allows the operator to change the maximum engine speed in A mode from 2000 n / min to another value by rotating the engine speed / vehicle speed setting dial 43. Furthermore, since changes to the maximum engine speed setting are reflected on the center display 51d, the operator can set the desired maximum engine speed while viewing the center display 51d.

[0059] When A mode is selected, pressing the A / B selector switch 41 switches the driving mode to B mode. As a result, the B mode display is shown in white text on a black background. On the other hand, the A mode display is shown in black text on a white background. In this state, the operator moves the engine speed / vehicle speed selector switch 42 to one side to select the vehicle speed as the target for switching. As a result, the operator can change the maximum vehicle speed in B mode from 10 km / h to another value by rotating the engine speed / vehicle speed setting dial 43. Also, when B mode is selected, the operator moves the engine speed / vehicle speed selector switch 42 to the other side to select the maximum engine speed selector as the target for switching. As a result, the operator can change the maximum engine speed in B mode from 1000 n / min to another value by rotating the engine speed / vehicle speed setting dial 43.

[0060] As can be seen from the above explanation, changing the maximum vehicle speed and maximum engine speed settings using the operating members 41-43 may require a large number of operations. For example, suppose mode A is selected and vehicle speed switching is selected on the engine speed / vehicle speed selector switch 42. In this case, to change the maximum engine speed setting for mode B, it is necessary to operate the A / B selector switch 41, the engine speed / vehicle speed selector switch 42, and the engine speed / vehicle speed setting dial 43. This may cause the operator to find the operation cumbersome or difficult to understand. Taking these points into consideration, in this embodiment, it is possible to change the maximum vehicle speed and maximum engine speed settings not only using the operating members 41-43 but also using the display device.

[0061] [2-2. Configurations using display devices] In this embodiment, the display device that enables the setting change of the maximum vehicle speed and maximum engine speed is the touch panel TP described above (see Figure 2). However, if a separate operating device (input device) is provided that allows the screen operation of the display device to be operated by a method other than touch operation, then the touch operation input function is not necessary for the display device that enables the setting change of the maximum vehicle speed and maximum engine speed. In other words, the display device that enables the setting change of the maximum vehicle speed and maximum engine speed may be configured using something other than a touch panel.

[0062] Figure 8 shows an example of a screen displayed on the touch panel TP. As shown in Figure 8, the touch panel TP (display device) is provided to display a setting confirmation screen S1 which displays a maximum vehicle speed display area R1 that displays the maximum vehicle speed setting value and a maximum engine speed display area R2 that displays the maximum engine speed setting value side by side.

[0063] Furthermore, the settings confirmation screen S1 includes a maximum vehicle speed operation area R3, which is displayed alongside the maximum vehicle speed display area R1 and allows the user to change the maximum vehicle speed setting, and a maximum engine speed operation area R4, which is displayed alongside the maximum engine speed display area R2 and allows the user to change the maximum engine speed setting.

[0064] With this configuration, the operator can easily change the maximum vehicle speed and maximum engine speed settings by displaying a single screen S1 on which they can check the set values. Furthermore, since the operation areas R3 and R4 for changing the set values ​​are arranged alongside the display areas R1 and R2 for the set values, the operator can intuitively perform the operation to change the maximum vehicle speed and maximum engine speed settings. In other words, according to the configuration of this embodiment, the convenience of the work vehicle 1, which has a set maximum vehicle speed and maximum engine speed, can be improved.

[0065] In detail, the settings confirmation screen S1 displays the maximum vehicle speed display area R1, the maximum engine speed display area R2, the maximum vehicle speed control area R3, and the maximum engine speed control area R4 for each of the multiple driving modes. With this configuration, the maximum vehicle speed and maximum engine speed settings that need to be set for each driving mode can be set all at once by displaying a single screen S1, thereby reducing the burden on the operator during settings.

[0066] In this embodiment, the setting method for the maximum vehicle speed and maximum engine speed can be selectively used with either the setting method using the operating members 41-43 or the setting method using the touch panel TP. The system may also be configured to only include a configuration that utilizes the touch panel TP, which allows the work vehicle 1 to easily perform the setting operation. However, by configuring the system to allow the setting method using the operating members 41-43 as in this embodiment, the method using the operating members 41-43 can be used when setting operations using the touch panel TP are difficult, for example, when attention must be paid to the area in front of the work vehicle 1. In other words, by configuring the system as in this embodiment, the convenience of setting the maximum vehicle speed and maximum engine speed can be improved.

[0067] Furthermore, in this embodiment, the setting confirmation screen S1 is made displayable by a screen transition operation on the touch panel TP. Figure 9 is a schematic diagram illustrating the screen transition operation on the touch panel TP. The example shown in Figure 9 assumes that the home screen S10 is displayed first.

[0068] The operator touches one of the software buttons SB displayed on the home screen S10 that is related to setting the maximum vehicle speed and maximum engine speed. This displays the tractor settings screen S11. Once the tractor settings screen S11 is displayed, the operator touches one of the software buttons SB displayed on the tractor settings screen S11 that is related to setting the maximum vehicle speed and maximum engine speed. This displays the setting confirmation screen S1 (specifically the AB mode setting screen) which allows the setting of the maximum vehicle speed and maximum engine speed.

[0069] In this configuration, the user can easily reach the desired settings confirmation screen S1 by performing intuitive operations while looking at the icon displayed on the screen along with the software button SB. In the example shown in Figure 9, the user reaches the settings confirmation screen S1 via another screen S11 from the home screen S10, but this is merely an example. The user could also reach the settings confirmation screen S1 with just one touch operation on the home screen S10, or they could reach the settings confirmation screen S1 via multiple screens from the home screen S10.

[0070] Furthermore, the work vehicle 1 of this embodiment is equipped with an operating member for displaying the setting confirmation screen S1, in addition to the screen transition operation of the touch panel TP. Specifically, this operating member is the A / B switch 41, the engine speed / vehicle speed switch 42, and the engine speed / vehicle speed setting dial 43. When any one of these operating members 41 to 43 is operated, the setting confirmation screen S1 is displayed not only on the center display 51d but also on the touch panel TP. With this configuration, the operating members 41 to 43 can be used as pseudo-shortcut buttons for screen transitions to quickly display the setting confirmation screen S1.

[0071] In this embodiment, the setting confirmation screen S1 can only be displayed if the display settings for maximum vehicle speed and maximum engine speed are enabled in the touch panel TP's display settings. That is, in order to display the set values ​​for maximum vehicle speed and maximum engine speed on the touch panel TP, it is a prerequisite that the display settings for maximum vehicle speed and maximum engine speed are enabled. However, this is merely an example, and such an enable / disable setting may not be provided, and the setting confirmation screen S1 may always be available.

[0072] Furthermore, in this embodiment, if no operation is performed on the operating members 41-43 or the touch panel TP for a predetermined period of time after the setting confirmation screen S1 is displayed, the touch panel TP displays the screen that was displayed before (specifically, immediately before) the setting confirmation screen S1 is displayed. With this configuration, for example, if the operator confirms that there is no need to change settings such as the maximum vehicle speed after the setting confirmation screen S1 is displayed, or after the operator has completed changing the settings, the system can automatically return to the screen that was displayed immediately before (the original screen). One situation in which the operation to display the setting confirmation screen S1 is performed is assumed to be when the work vehicle 1 is performing work. For this reason, the configuration of this embodiment is convenient because, after the setting confirmation screen S1 is displayed, the system can automatically return to the screen that was previously used for work. An example of a screen that was previously used for work is the screen displayed when automatic steering is being performed.

[0073] Furthermore, in this embodiment, if any one of the A / B switch 41, engine speed / vehicle speed switch 42, engine speed / vehicle speed setting dial 43, or touch panel TP is operated within a predetermined time after the setting confirmation screen S1 is displayed, the display time of the setting confirmation screen S1 is extended. With this configuration, the operator who has changed the setting value is given time to confirm the changed setting value.

[0074] Here, we will explain the details of the setting confirmation screen S1 with reference to Figure 8. Note that in explaining the setting confirmation screen S1, we will use the up, down, left, and right directions based on the setting confirmation screen S1 shown in Figure 8. The up, down, left, and right directions used in explaining the setting confirmation screen S1 do not necessarily have to match the up, down, left, and right directions defined earlier for the overall explanation of the work vehicle 1.

[0075] As shown in Figure 8, the setting confirmation screen S1 has display areas in addition to the maximum vehicle speed display area R1, maximum engine speed display area R2, maximum vehicle speed operation area R3, and maximum engine speed operation area R4 described above. The setting confirmation screen S1 further has a title display area R5, a setting content explanation area R6, an AB mode display area R7, a setting target display area R8, an A / B automatic switching selection area R9, a precautions display area R10, and a screen switching icon display area R11.

[0076] The title display area R5 is provided as an area to display a predetermined title so that the operator can easily grasp the content of the screen that is currently selected. The title display area R5 is a horizontal rectangle and is located at the top edge of the rectangular screen. In the example shown in Figure 8, the title displayed in the title display area R5 of the setting confirmation screen S1 is "AB Mode Settings".

[0077] The setting details explanation area R6 is an area that specifically displays the contents of the setting items shown on the setting confirmation screen S1. The setting details explanation area R6 is located below the title display area R5. Specifically, the setting details explanation area R6 includes a text display area R6a indicating that the setting items are maximum vehicle speed and maximum engine speed, and an icon display area R6b. The icon display area R6b includes an area where a first icon R6b1, which suggests the setting of maximum vehicle speed, is displayed, and an area where a second icon R6b2, which suggests the setting of maximum engine speed, is displayed. The first icon R6b1 and the second icon R6b2 are displayed with a gap between them in the left-right direction, with the first icon R6b1 on the left and the second icon R6b2 on the right.

[0078] The AB mode display area R7 is an area that displays whether the selected driving mode is A mode or B mode. The AB mode display area R7 is located below the setting explanation area R6 and is positioned towards the left edge of the screen. The AB mode display area R7 displays the letters "A" at the top and "B" at the bottom, with the letters "A" and "B" side by side. The AB mode display area R7 also displays a circle to the left of each letter "A" and "B". The display of this circle changes depending on whether A mode or B mode is selected as the driving mode.

[0079] When A mode is selected as the driving mode, the circle to the left of the letter "A" will be filled in, and the circle to the left of the letter "B" will not be filled in. When B mode is selected as the driving mode, the circle to the left of the letter "A" will not be filled in, and the circle to the left of the letter "B" will be filled in. In the example shown in Figure 8, the circle to the left of the letter "A" is filled in. In other words, Figure 8 is the setting confirmation screen S1 when A mode is selected as the driving mode. Note that the AB mode display area R7 may be an area that allows selection between A mode and B mode by touch operation.

[0080] The setting target display area R8 is an area that informs the operator of the item selected as the target for setting value change operation using the engine speed / vehicle speed setting dial 43. The setting target display area R8 is provided in relation to the maximum vehicle speed display area R1, the maximum engine speed display area R2, the maximum vehicle speed operation area R3, and the maximum engine speed operation area R4. Therefore, before explaining the details of the setting target display area R8, we will explain the details of the maximum vehicle speed display area R1, the maximum engine speed display area R2, the maximum vehicle speed operation area R3, and the maximum engine speed operation area R4.

[0081] The maximum vehicle speed display area R1 is a horizontally elongated rectangular area. More specifically, the maximum vehicle speed display area R1 includes a first maximum vehicle speed display area R1a that displays the maximum vehicle speed for A mode, and a second maximum vehicle speed display area R1b that displays the maximum vehicle speed for B mode. The first maximum vehicle speed display area R1a is located to the right of the letter "A" in the AB mode display area R7 and below the first icon R6b1, which is associated with the maximum vehicle speed setting. The second maximum vehicle speed display area R1b is located to the right of the letter "B" in the AB mode display area R7 and below the first icon R6b1. With this arrangement, the operator can easily recognize which setting value is being displayed by using the letters "A" and "B" and the first icon R6b1 as markers. The second maximum vehicle speed display area R1b is located below the first maximum vehicle speed display area R1a.

[0082] The maximum engine speed display area R2 is a horizontally elongated rectangular area. More specifically, the maximum engine speed display area R2 includes a first maximum engine speed display area R2a that displays the maximum engine speed for A mode, and a second maximum engine speed display area R2b that displays the maximum engine speed for B mode. The first maximum engine speed display area R2a is located to the right of the letter "A" in the AB mode display area R7 and below the second icon R6b2, which is associated with the maximum engine speed setting. The second maximum engine speed display area R2b is located to the right of the letter "B" in the AB mode display area R7 and below the second icon R6b2. With this arrangement, the operator can easily recognize which setting value is being displayed by using the letters "A" and "B" and the second icon R6b2 as markers. The second maximum engine speed display area R2b is located below the first maximum engine speed display area R2a.

[0083] The maximum vehicle speed control area R3 is arranged side by side with respect to the maximum vehicle speed display area R1. As described above, the maximum vehicle speed display area R1 includes a first maximum vehicle speed display area R1a and a second maximum vehicle speed display area R1b. The maximum vehicle speed control area R3 is arranged side by side with respect to each of the first maximum vehicle speed display area R1a and the second maximum vehicle speed display area R1b. In detail, the maximum vehicle speed control area R3 includes a rectangular maximum vehicle speed reduction area R3a that decreases the set value by touch operation, and a rectangular maximum vehicle speed increase area R3b that increases the set value by touch operation. With respect to each of the first maximum vehicle speed display area R1a and the second maximum vehicle speed display area R1b, the maximum vehicle speed reduction area R3a is located on the left side and the maximum vehicle speed increase area R3b is located on the right side.

[0084] Touching the maximum speed reduction area R3a, located to the left of the first maximum speed display area R1a, will decrease the set value of the first maximum speed display area R1a. Touching the maximum speed increase area R3b, located to the right of the first maximum speed display area R1a, will increase the set value of the first maximum speed display area R1a. Touching the maximum speed reduction area R3a, located to the left of the second maximum speed display area R1b, will decrease the set value of the second maximum speed display area R1b. Touching the maximum speed increase area R3b, located to the right of the second maximum speed display area R1b, will increase the set value of the second maximum speed display area R1b.

[0085] The maximum engine speed control area R4 is arranged side by side with respect to the maximum engine speed display area R2. As described above, the maximum engine speed display area R2 includes a first maximum engine speed display area R2a and a second maximum engine speed display area R2b. The maximum engine speed control area R4 is arranged side by side with respect to each of the first maximum engine speed display area R2a and the second maximum engine speed display area R2b. In detail, the maximum engine speed control area R4 includes a rectangular maximum engine speed reduction area R4a that decreases the set value by touch operation, and a rectangular maximum engine speed increase area R4b that increases the set value by touch operation. With respect to each of the first maximum engine speed display area R2a and the second maximum engine speed display area R2b, the maximum engine speed reduction area R4a is located on the left side and the maximum engine speed increase area R4b is located on the right side.

[0086] Touching the maximum engine speed reduction area R4a, located to the left of the first maximum engine speed display area R2a, will decrease the setting value of the first maximum engine speed display area R2a. Touching the maximum engine speed increase area R4b, located to the right of the first maximum engine speed display area R2a, will increase the setting value of the first maximum engine speed display area R2a. Touching the maximum engine speed reduction area R4a, located to the left of the second maximum engine speed display area R2b, will decrease the setting value of the second maximum engine speed display area R2b. Touching the maximum engine speed increase area R4b, located to the right of the second maximum engine speed display area R2b, will increase the setting value of the second maximum engine speed display area R2b.

[0087] In this embodiment, as a preferred configuration, the maximum vehicle speed control area R3 and the maximum engine speed control area R4 display icons indicating the change in the set value. Specifically, the maximum vehicle speed reduction area R3a, which constitutes the maximum vehicle speed control area R3, displays a minus icon "-" that suggests reduction, and the maximum vehicle speed increase area R3b displays a plus icon "+" that suggests increase. Similarly, the maximum engine speed reduction area R4a, which constitutes the maximum engine speed control area R4, displays a minus icon "-" that suggests reduction, and the maximum engine speed increase area R4b displays a plus icon "+" that suggests increase. By displaying icons that indicate (or suggest) the change in each control area R3 and R4 in this way, intuitive operation can be enabled, and operator operability can be improved. Note that the icons indicating increase or decrease are not limited to "+" and "-", but may also be arrows, for example.

[0088] The configurable display area R8 is provided for each of the following: the first maximum vehicle speed display area R1a, the second maximum vehicle speed display area R1b, the first maximum engine rotation speed display area R2a, and the second maximum engine rotation speed display area R2b. In other words, four configurable display areas R8 are provided. The four configurable display areas R8 have the same shape, specifically a horizontally elongated rectangle.

[0089] The first setting target display area R8a is provided so as to surround the first maximum vehicle speed display area R1a and the maximum vehicle speed reduction area R3a and maximum vehicle speed increase area R3b provided to its left and right. The second setting target display area R8b is provided so as to surround the second maximum vehicle speed display area R1b and the maximum vehicle speed reduction area R3a and maximum vehicle speed increase area R3b provided to its left and right. The third setting target display area R8c is provided so as to surround the first maximum engine rotation speed display area R2a and the maximum engine rotation speed reduction area R4a and maximum engine rotation speed increase area R4b provided to its left and right. The fourth setting target display area R8d is provided so as to surround the second maximum engine rotation speed display area R2b and the maximum engine rotation speed reduction area R4a and maximum engine rotation speed increase area R4b provided to its left and right.

[0090] Each setting target display area R8a to R8d displays differently depending on whether it is selected as a target for modification or not. When each setting target display area R8a to R8d is selected as a target for modification using the engine speed / vehicle speed setting dial 43, the area excluding the setting value display areas R1 and R2 and the operation areas R3 and R4 will be filled in. When each setting target display area R8a to R8d is not selected as a target for modification using the engine speed / vehicle speed setting dial 43, it will not be filled in. In the example shown in Figure 8, the first setting target display area R8a is filled in, and the maximum vehicle speed setting value for A mode can be changed using the engine speed / vehicle speed setting dial 43.

[0091] Furthermore, when using the touch panel TP, even items whose setting target display area R8 is not filled in can be changed using the operation areas R3 and R4.

[0092] The A / B automatic switching selection area R9 is an area where you can select whether to enable or disable the A / B automatic switching, which automatically switches between A mode and B mode. Here, it is assumed that A mode is used as the driving mode during work, and B mode is used as the driving mode during turning. When A / B automatic switching is set to enabled, automatic switching between A mode and B mode is performed, for example, by detecting the raising or lowering of the work implement 12. The raising or lowering of the work implement 12 is detected, for example, by operating the work implement lifting switch. When the work implement 12 is raised from the state where the work vehicle 1 is driving for work, the A / B automatic switching is activated, and the driving mode is automatically switched from A mode to B mode. Also, when the work vehicle 1 finishes turning and the work implement 12 is lowered, the A / B automatic switching is activated, and the driving mode is automatically switched from B mode to A mode.

[0093] Furthermore, whether the work vehicle 1 has transitioned from work driving to turning driving, or from turning driving to work driving, may be detected using the steering angle of the steering wheel 16b. In addition, in this embodiment, when A / B automatic switching is performed, a screen displaying the maximum vehicle speed and maximum engine speed settings is interrupted and displayed on the center display 51d and the touch panel TP. The screen shown in Figure 7 above is displayed on the center display 51d. The setting confirmation screen S1 is displayed on the touch panel TP.

[0094] The A / B automatic switching selection area R9 is located below the setting target display area R8 on the setting confirmation screen S1. In the example shown in Figure 8, the A / B automatic switching selection area R9 consists of a rectangular area R9a extending horizontally and a circular area R9b placed within the rectangular area R9a. By moving the circular area R9b left or right within the rectangular area R9a using touch operation, the A / B automatic switching can be enabled or disabled. In the example shown in Figure 8, the A / B automatic switching is enabled when the circular area R9b is positioned to the right of the rectangular area R9a. That is, Figure 8 shows the screen state when the operator selects to enable the A / B automatic switching. On the other hand, the A / B automatic switching is disabled when the circular area R9b is positioned to the left of the rectangular area R9a.

[0095] In the example shown in Figure 8, when the circular area R9b is positioned to enable A / B automatic switching, the rectangular area R9a will be filled in. Conversely, when the circular area R9b is positioned to disable A / B automatic switching, the rectangular area R9a will not be filled in. This configuration allows the operator to instantly determine whether A / B automatic switching is enabled or disabled.

[0096] As can be seen from the above, in this embodiment, the setting confirmation screen S1 displays an automatic switching necessity selection area (A / B automatic switching selection area R9) that allows the operator to select whether or not to automatically switch between the first driving mode (A mode) and the second driving mode (B mode). With this configuration, the operator can easily decide whether or not to use automatic switching of the driving mode according to their preference, which is convenient for the operator.

[0097] The warning display area R10 is an area that displays warnings in text when A / B automatic switching is enabled. In the example shown in Figure 8, the warning displayed is for when the maximum vehicle speed setting for B mode is set higher than the maximum vehicle speed setting for A mode. Specifically, it is indicated that if the maximum vehicle speed setting for B mode is set higher than the maximum vehicle speed setting for A mode, a confirmation screen will be displayed before automatic switching is performed.

[0098] Figure 10 shows an example of a confirmation screen S2 that is displayed before the automatic A / B switching is performed. Specifically, this confirmation screen S2 is displayed interruptively on the touch panel TP when the conditions for automatic switching from A mode to B mode are met and the maximum vehicle speed setting for B mode is set higher than the maximum vehicle speed setting for A mode. As shown in Figure 10, the switching from A mode to B mode will not occur unless the operator presses the A / B switch 41. In other words, if the operator does not press the A / B switch 41, A mode is maintained. When the operator presses the A / B switch 41, the switching from A mode to B mode is performed, and the touch panel TP returns to the state before the confirmation screen S2 was displayed. With this configuration, it is possible to prevent the automatic switching of the driving mode when transitioning from work driving to turning driving, when the operator is unaware that the speed may increase due to the automatic change of the driving mode. In other words, the safety of the work vehicle 1 can be improved.

[0099] The screen switching icon display area R11 is provided to facilitate switching from the settings confirmation screen S1 to other screens. The screen switching icon display area R11 is located below the cautionary notes display area R10 and at the bottom edge of the settings confirmation screen S1. The screen switching icon display area R11 contains multiple areas arranged horizontally, each displaying an icon, for example, representing the home screen. When an area with an icon is touched, the touch panel TP screen switches to the screen corresponding to the touched icon.

[0100] [2-3. Variations] Figure 11 shows a modified setting confirmation screen S1A displayed on the touch panel TP. In the modified setting confirmation screen S1A, a speed increase confirmation selection area R12 is displayed, which is not present in the setting confirmation screen S1 (see Figure 8) according to the above embodiment.

[0101] The speed increase confirmation selection area R12 is an area where the user can choose whether or not to perform a speed increase confirmation when A / B automatic switching is enabled. If a speed increase confirmation is performed, a confirmation screen S2 (see Figure 10) is displayed, similar to the embodiment described above. Hereinafter, this confirmation screen S2 may be referred to as the speed increase confirmation screen S2. The speed increase confirmation selection area R12 is located to the right of the A / B automatic switching selection area R9. The speed increase confirmation selection area R12 has the same configuration as the A / B automatic switching selection area R9 and consists of a rectangular area R12a extending in the left-right direction and a circular area R12b located within the rectangular area R12a. By moving the circular area R12b left or right within the rectangular area R12a using touch operation, the user can switch whether or not to perform a speed increase confirmation.

[0102] Note that the speed increase confirmation selection area R12 is only necessary when A / B automatic switching is enabled. For this reason, if A / B automatic switching is disabled, the speed increase confirmation selection area R12 becomes inoperable. When it becomes inoperable, it is preferable to notify the operator of this fact, for example by graying out the speed increase confirmation selection area R12.

[0103] Figure 11 shows the state in which speed increase confirmation is selected by the speed increase confirmation selection area R12. In this case, as with the embodiment described above, the speed increase confirmation screen S2 (see Figure 10) is displayed when the automatic switching condition from mode A to mode B is met and the maximum vehicle speed setting value for mode B is set higher than the maximum vehicle speed setting value for mode A. When the speed increase confirmation screen S2 is displayed, as described above, the switch from mode A to mode B will not occur unless the operator presses the A / B switch 41. That is, when speed increase confirmation is selected, the driving mode control unit 22 (see Figure 2) executes a confirmation request process that requests the operator to perform a confirmation operation using the A / B switch 41. On the other hand, if the operator moves the circular area R12b in the speed increase confirmation selection area R12 to the left from the state shown in Figure 11, it means that not performing speed increase confirmation is selected. In this case, even if the maximum vehicle speed setting value for mode B is set higher than the maximum vehicle speed setting value for mode A, the speed increase confirmation screen S2 is not displayed and the system automatically switches from mode A to mode B. In other words, when the option to not perform a speed increase check is selected, the driving mode control unit 22 does not execute a confirmation request process that requests a confirmation operation (operation of the A / B selector switch 41) based on the display of the speed increase check screen S2.

[0104] As can be seen from the above, in this modified example, when automatic switching (A / B automatic switching) is selected, a confirmation requirement selection area (speed increase confirmation selection area R12) is displayed on the setting confirmation screen S1. The confirmation requirement selection area (speed increase confirmation selection area R12) allows the operator to select whether or not to request a confirmation process that requires the operator (user) to perform a confirmation operation before automatic switching, depending on the relationship between the maximum vehicle speed setting values ​​between the first driving mode (A mode) and the second driving mode (B mode). With this configuration, it is possible to reduce the possibility that an operator familiar with the use of the work vehicle 1 may feel annoyed by the display and the operations required as a result of the display.

[0105] In this modified example, as a preferred configuration, when the speed increase confirmation selection area R12 is selected to not perform speed increase confirmation (speed increase confirmation off), a reconfirmation screen S3 as shown in Figure 12 is displayed. Figure 12 is an example diagram illustrating the configuration of the reconfirmation screen S3 that is displayed when speed increase confirmation is not selected.

[0106] The reconfirmation screen S3 displays points to note if the speed increase check is not performed and requests the operator's understanding and approval of these points. The operator cannot turn off the speed increase check function unless they approve the points displayed on the reconfirmation screen S3. In addition to the points to note, the reconfirmation screen S3 includes a selection area (the part that displays "YES" and "NO" in the diagram) to select whether or not to turn off the speed increase check function. Touching "Yes" in this selection area constitutes the approval described above.

[0107] In this modified example, the following two points should be noted. The first point to note is that the speed increase confirmation function can only be turned off when the operator is seated. That is, the operator cannot select "YES" on the reconfirmation screen S3 unless they are seated in the driver's seat 16a. The second point to note is that the speed increase confirmation function automatically turns on when the work vehicle 1 is turned off or when the operator leaves the driver's seat 16a. That is, even if the operation to turn off the speed increase confirmation function is initially accepted, the function will automatically turn on when the operator leaves the seat or when the key is turned off. With this configuration, the speed increase confirmation function will always automatically turn on when the operator of the work vehicle 1 is replaced by another person, thus preventing situations where the speed increase confirmation function is turned off without the operator's knowledge.

[0108] The operator's (user's) sitting and leaving the driver's seat 16a is performed using a sensor, such as a seat switch. The seat switch is included in the sensor 3 shown in Figure 2, for example. For example, when the seat switch is ON, the operator's sitting is detected, and when the seat switch is OFF, the operator's leaving is detected. In the work vehicle 1, the following configuration may be adopted using such a seat switch. After the confirmation requirement selection area (speed increase confirmation selection area R12) has selected that confirmation request processing is unnecessary, if it is detected that the operator's (user's) state has changed from sitting to leaving, the system may switch to a setting that requires confirmation request processing. Adopting such a configuration prevents a situation from occurring where, when the operator who has disabled the confirmation request processing (disabled the speed increase confirmation function) is replaced by another operator, the work vehicle 1 unexpectedly increases speed without speed increase confirmation being performed, even though the operator is driving with the expectation that speed increase confirmation will be performed.

[0109] <3. Things to keep in mind> Various technical features disclosed herein may be modified in various ways without departing from the spirit of the technical creation. Furthermore, the multiple embodiments, examples, and modifications shown herein may be combined as possible.

[0110] <4. Addendum> The embodiments, examples, and modifications described above are further disclosed below.

[0111] An exemplary work vehicle of the present invention is a work vehicle equipped with a display device, wherein the display device is provided capable of displaying a setting confirmation screen that displays side by side a maximum vehicle speed display area for displaying a maximum vehicle speed setting value and a maximum engine speed display area for displaying a maximum engine speed setting value, and the setting confirmation screen may include a maximum vehicle speed operation area displayed side by side with the maximum vehicle speed display area for changing the maximum vehicle speed setting value, and a maximum engine speed operation area displayed side by side with the maximum engine speed display area for changing the maximum engine speed setting value (first configuration).

[0112] The work vehicle in the first configuration described above may be configured to allow setting of multiple driving modes in which the combination of the maximum vehicle speed setting value and the maximum engine speed setting value is different from each other, and the setting confirmation screen may be configured to display the maximum vehicle speed display area, the maximum engine speed display area, the maximum vehicle speed operation area, and the maximum engine speed operation area for each of the multiple driving modes (second configuration).

[0113] In the work vehicle with the first or second configuration described above, the setting confirmation screen may be configured to be displayable by a screen transition operation of the display device (third configuration).

[0114] A work vehicle having any of the first to third configurations described above may further include an operating member for displaying the setting confirmation screen (fourth configuration).

[0115] In the work vehicle of the fourth configuration described above, the operating member may be positioned to the side of the driver's seat (fifth configuration).

[0116] The work vehicle according to the fourth or fifth configuration described above may be configured such that the maximum vehicle speed setting value and the maximum engine speed setting value can be changed using the operating member (sixth configuration).

[0117] In a work vehicle with any of the above configurations 4 to 6, if neither the operating member nor the display device is operated for a predetermined period of time or longer after the setting confirmation screen is displayed, the display device may be configured to display the screen that was displayed before the setting confirmation screen was displayed (configuration 7).

[0118] In a work vehicle with any of the above configurations 1 to 7, the maximum vehicle speed operating range and the maximum engine rotation speed operating range may be configured to display icons indicating the form of change of the set value (configuration 8).

[0119] In the work vehicle of the second configuration described above, the plurality of driving modes may consist of a first driving mode and a second driving mode, and the setting confirmation screen may display an automatic switching necessity selection area that allows the user to select whether or not to automatically switch between the first driving mode and the second driving mode (the ninth configuration).

[0120] In the work vehicle of the ninth configuration described above, the setting confirmation screen may be configured to display a confirmation requirement selection area (the tenth configuration) which allows the user to select whether or not to perform a confirmation request process that requires a confirmation operation from the user before the automatic switching, depending on the relationship between the set value of the maximum vehicle speed between the first driving mode and the second driving mode, when the automatic switching is selected.

[0121] The work vehicle in the above-described 10th configuration may be equipped with a sensor that detects when the user is seated in and out of the driver's seat, and after the confirmation requirement selection area has selected that the confirmation request process is unnecessary, if it detects that the user's state has changed from seated to out of the seat, it may be configured to switch to a setting that requires the confirmation request process (11th configuration). [Explanation of Symbols]

[0122] 1. Work vehicles 16a... Driver's seat 41. A / B selector switch (operating component) 42. Engine speed / vehicle speed selector switch (operating component) 43. Engine speed / vehicle speed setting dial (operating component) R1...Maximum vehicle speed display area R1a...1st maximum vehicle speed display area R1b...1st maximum vehicle speed display area R2... Maximum engine speed display area R2a...First maximum engine rotational speed display area R2b...Second maximum engine rotation speed display area R3...Maximum vehicle speed operation area R3a...Maximum vehicle speed reduction range R3b... Maximum vehicle speed increase range R4...Maximum engine speed operating range R4a...Maximum engine speed reduction range R4b...Maximum engine speed increase range R9...A / B automatic switching selection area (automatic switching requirement / required selection area) R12... Speed ​​increase confirmation selection area (Confirmation screen required / not required selection area) S1, S1A...Settings confirmation screen S2... Speed ​​increase confirmation screen (confirmation screen) TP... Touch panel (display device)

Claims

1. A work vehicle equipped with a display device, The display device is provided capable of displaying a setting confirmation screen that shows a maximum vehicle speed display area for displaying the set value of the maximum vehicle speed and a maximum engine speed display area for displaying the set value of the maximum engine speed side by side. The aforementioned settings confirmation screen includes: A maximum vehicle speed operation area is displayed alongside the maximum vehicle speed display area, and allows the setting value of the maximum vehicle speed to be changed. A maximum engine speed operation area is displayed alongside the maximum engine speed display area, and allows the setting value of the maximum engine speed to be changed. Work vehicles that include this.

2. Multiple driving modes can be set, each with a different combination of the set value for the maximum vehicle speed and the set value for the maximum engine speed. The work vehicle according to claim 1, wherein the setting confirmation screen displays the maximum vehicle speed display area, the maximum engine speed display area, the maximum vehicle speed operation area, and the maximum engine speed operation area for each of the multiple driving modes.

3. The work vehicle according to claim 1, wherein the setting confirmation screen is provided to be displayable by a screen transition operation of the display device.

4. The work vehicle according to claim 1, further comprising an operating member for displaying the aforementioned setting confirmation screen.

5. The work vehicle according to claim 4, wherein the operating member is positioned to the side of the driver's seat.

6. The work vehicle according to claim 5, wherein the operating member is provided to allow the setting value of the maximum vehicle speed and the setting value of the maximum engine rotation speed to be changed.

7. The work vehicle according to claim 4, wherein if neither the operating member nor the display device is operated for a predetermined period of time or longer after the setting confirmation screen is displayed, the display device displays the screen that was displayed before the setting confirmation screen was displayed.

8. The work vehicle according to any one of claims 1 to 7, wherein the maximum vehicle speed operating range and the maximum engine speed operating range display icons indicating the form of change of the set value.

9. The aforementioned multiple driving modes consist of a first driving mode and a second driving mode. The work vehicle according to claim 2, wherein the setting confirmation screen displays an automatic switching necessity selection area that allows the user to select whether or not automatic switching between the first driving mode and the second driving mode is necessary.

10. The work vehicle according to claim 9, wherein the setting confirmation screen displays a confirmation requirement selection area that, when the automatic switching is selected, allows the user to select whether or not to perform a confirmation request process that requests a confirmation operation from the user before the automatic switching, according to the relationship between the set value of the maximum vehicle speed between the first driving mode and the second driving mode.

11. The system includes a sensor that detects when the user sits in and leaves the driver's seat. The work vehicle according to claim 10, wherein, after the user's status has changed from seated to unseated, the setting is switched to require the user's status after the user has selected that the user does not need to perform the user's status in the user selection area.

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