work vehicles

Abstract

This invention provides a technique to improve the convenience of setting the maximum vehicle speed and maximum engine rotation speed of a work vehicle. An exemplary work vehicle is one equipped with a display device. The display device is configured to display a setting confirmation screen, which displays, side-by-side, a maximum vehicle speed display area for displaying the maximum vehicle speed setting value and a maximum engine rotation speed display area for displaying the maximum engine rotation speed setting value. The setting confirmation screen includes: a maximum vehicle speed operation area, displayed side-by-side with the maximum vehicle speed display area, and capable of changing the maximum vehicle speed setting value; and a maximum engine rotation speed operation area, displayed side-by-side with the maximum engine rotation speed display area, and capable of changing the maximum engine rotation speed setting value.

Description

Technical Field

[0001] This invention relates to work vehicles. Background Technology

[0002] Patent Document 1 discloses a tractor that can set a target engine speed when the engine speed change operation component is operated at its maximum by using an engine speed upper limit setting component. Additionally, Patent Document 1 discloses a tractor that can set a maximum speed value when the main transmission operation component is operated at its maximum by using a maximum speed setting component.

[0003] Furthermore, Patent Document 1 discloses that the maximum speed setting component and the engine speed limit setting component can also be composed of shared components. Moreover, in this case, a structure is disclosed that functions as both the engine speed limit setting component and the maximum speed setting component, and includes an engine rotation / vehicle speed switching switch and an engine rotation / vehicle speed setting dial.

[0004] Patent Document 1: Japanese Patent Application Publication No. 2016-21950

[0005] However, some work vehicles are equipped with multiple driving modes, determined by a combination of the engine speed limit set by the engine speed limit setting unit and the maximum speed set by the maximum speed setting unit. In such work vehicles, it is necessary to set the engine speed limit and maximum speed for each driving mode. In this case, there are concerns that setting these parameters using buttons, dials, or other operating components may become complex or difficult to understand. Summary of the Invention

[0006] The purpose of this invention is to provide a technology that improves the convenience of setting the maximum vehicle speed and the maximum engine rotation speed of a work vehicle.

[0007] An exemplary work vehicle of the present invention is a work vehicle equipped with a display device. The display device is configured to display a setting confirmation screen, which displays, side-by-side, a maximum vehicle speed display area for displaying the maximum vehicle speed setting value and a maximum engine rotation speed display area for displaying the maximum engine rotation speed setting value. The setting confirmation screen includes: a maximum vehicle speed operation area, displayed side-by-side with the maximum vehicle speed display area, and capable of changing the maximum vehicle speed setting value; and a maximum engine rotation speed operation area, displayed side-by-side with the maximum engine rotation speed display area, and capable of changing the maximum engine rotation speed setting value.

[0008] According to the illustrative invention, the convenience of a work vehicle that can set a maximum vehicle speed and a maximum engine rotation speed can be improved. Attached Figure Description

[0009] Figure 1 It is a side view showing the general structure of the working vehicle.

[0010] Figure 2 This diagram is used to illustrate the control system of a work vehicle.

[0011] Figure 3 This is a schematic diagram showing the structure of the dashboard.

[0012] Figure 4 This is a block diagram representing the functions of the touch panel control unit.

[0013] Figure 5 It is a top view showing the general structure around the driver's seat.

[0014] Figure 6 It is a three-dimensional diagram showing the general structure of the main gear shift lever.

[0015] Figure 7 This is a schematic diagram illustrating an insertion display in the central display.

[0016] Figure 8 This is an example of a screen displayed on a touch panel.

[0017] Figure 9 This is a diagram illustrating the screen switching operations of a touch panel.

[0018] Figure 10 This is an example of a confirmation screen displayed before the automatic A / B switch is executed.

[0019] Figure 11 This is a diagram showing the settings confirmation screen related to the variant displayed on the touch panel.

[0020] Figure 12 This is a diagram illustrating the structure of the reconfirmation screen that appears when the option to not confirm the speed increase is selected.

[0021] Explanation of reference numerals in the attached figures

[0022] 1...Work vehicle; 16a...Driver's seat; 41...A / B switch (operating component); 42...Engine rotation / vehicle speed switch (operating component); 43...Engine rotation / vehicle speed setting dial (operating component); R1...Maximum vehicle speed display area; R1a...First maximum vehicle speed display area; R1b...Second maximum vehicle speed display area; R2...Maximum engine rotation speed display area; R2a...First maximum engine rotation speed display area; R2b...Second maximum engine rotation speed display area; R3...Maximum vehicle speed operation area; R3a...Maximum vehicle speed reduction area; R3b...Maximum vehicle speed increase area; R4...Maximum engine rotation speed operation area; R4a...Maximum engine rotation speed reduction area; R4b...Maximum engine rotation speed increase area; R9...A / B automatic switching selection area (automatic switching required / unrequired selection area); R12...Speed ​​increase confirmation selection area (confirmation screen required / unrequired selection area); S1, S1A...Setting confirmation screen; S2...Speed ​​increase confirmation screen (confirmation screen); TP...Touch panel (display device). Detailed Implementation

[0023] Embodiments of the present invention will be described with reference to the accompanying drawings. Furthermore, in the drawings, the same or equivalent parts are labeled with the same reference numerals, and their descriptions are not repeated unless specifically stated otherwise.

[0024] Furthermore, in this instruction manual, directions are defined as follows: First, the direction of the working vehicle's straight-line travel is defined as the forward / backward direction, with the steering wheel positioned in front of the driver's seat. Next, from the perspective of the operator sitting in the driver's seat facing forward, the right side is defined as right, and the left side as left, defining the left-right direction, which is orthogonal to the forward / backward direction. Finally, the direction orthogonal to both the forward / backward and left-right directions is defined as the up / down direction, with the direction of gravity defined as down, and its opposite side as up. These directions are merely illustrative names and are not intended to define actual positional relationships or directions.

[0025] <1. Overview of the work vehicles>

[0026] Figure 1 This is a side view showing the schematic structure of the work vehicle 1 according to an embodiment of the present invention. Figure 1 Specifically, this is the left-side view. For example... Figure 1 As shown, the work vehicle 1 has a main body 11 and a work machine 12.

[0027] The main body 11 constitutes the main part of the work vehicle 1 and is capable of traveling in the work site 200. The work machine 12 is installed on the work vehicle 1 by being mounted on the main body 11, etc. The work vehicle 1 uses the work machine 12 to perform work. The work vehicle 1 travels in the work site 200. In this embodiment, as an example, the work site 200 is a field. That is, the work vehicle 1 is a field work vehicle that performs field operations in the field 200.

[0028] In addition to the work site 200, the work vehicle 1 can also travel on roads such as highways to move around the site. That is, the work vehicle 1 is not limited to the work site 200.

[0029] In this embodiment, the work machine 12 is installed at the rear of the vehicle body 11. The work vehicle 1 is a tractor that tows the work machine 12 via the vehicle body 11. However, the work machine 12 may also be installed at the front of the vehicle body 11. That is, the work vehicle of the present invention may also have a structure in which the work machine is located at the front of the vehicle body. The work vehicle of the present invention may also be an agricultural work vehicle other than a tractor, or a work vehicle for civil engineering or construction work, etc.

[0030] The vehicle body 11 includes a base 13 and a pair of left and right running sections 14 that are spaced apart from each other in the left-right direction. Each running section 14 includes a front wheel 14a and a rear wheel 14b. That is, the front wheel 14a includes the left front wheel 14a and the right front wheel 14a. In addition, the rear wheel 14b includes the left rear wheel 14b and the right rear wheel 14b.

[0031] The front wheels 14a and rear wheels 14b are configured to transmit power from the engine 15 located in front of the base 13. By transmitting power from the engine 15 to the front wheels 14a and rear wheels 14b, the vehicle body 11 can travel on fields 200, etc. Furthermore, in this embodiment, the engine 15 is a diesel engine, but it is not limited to this; the engine 15 may also be a gasoline engine, a hydrogen engine, etc.

[0032] A driver's cab 16 for an operator (user) is provided on the base 13. The driver's cab 16 is located behind the engine 15. The driver's cab 16 includes a driver's seat 16a for the operator, a steering wheel 16b located in front of the driver's seat 16a for steering the work vehicle 1, and multiple control components for various operations by the operator. Figure 1 (Not shown in the image).

[0033] In addition, multiple operating components include, for example, a main gear lever and a secondary gear lever. The main gear lever is used to continuously change (arbitrarily change) the travel speed of the work vehicle 1. The secondary gear lever is used, for example, to indicate either the speed of the low-speed side or the speed of the high-speed side. After specifying an approximate speed using the secondary gear lever, the operator uses the main gear lever to specify a detailed speed. Furthermore, the multiple operating components include acceleration operating components (pedals, levers, etc.) capable of changing the rotational speed of the engine 15.

[0034] The work machine 12 is connected to the rear of the base 13 via a connecting mechanism 17. In this embodiment, the work machine 12 is vertically and flexibly connected to the base 13. A PTO shaft 18 for outputting power generated by the engine 15 to the work machine 12 is disposed at the rear of the base 13. The power of the engine 15 is transmitted to the PTO shaft 18 via a transmission device 19. Furthermore, the power source driving the work machine 12 can be separate from the engine 15 used to move the vehicle body 11. This separate power source can be a motor or the like.

[0035] In this embodiment, the work machine 12 is a rotary tiller. The land work performed by the work vehicle 1 is tillage work. However, the work machine 12 is not limited to a rotary tiller, and may also be a plow, harvester, harrow (drive harrow), pesticide spreader, fertilizer applicator, etc. In addition, the work vehicle 1 may also be configured to be able to replace various work machines 12.

[0036] Figure 2 This diagram illustrates the control system of the work vehicle 1 according to an embodiment of the present invention. Furthermore, in Figure 2 The diagram shows the constituent elements necessary to illustrate the features of the work vehicle 1 according to embodiments of the present invention, omitting descriptions of other general constituent elements, etc. Figure 2 As shown, the work vehicle 1 is equipped with a control device 2.

[0037] The control device 2 is, for example, a computer device configured to include an arithmetic unit, an input / output unit (neither shown), and a storage unit 21. The arithmetic unit is, for example, an integrated circuit such as a processor or microprocessor. The storage unit 21 is a main storage device such as ROM (Read Only Memory) or RAM (Random Access Memory). The storage unit 21 may also include auxiliary storage devices such as 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.

[0038] In this embodiment, through the coordinated operation of the aforementioned hardware and software, the control device 2 can function as various functional units. For example... Figure 2 As shown, the various functional units include a driving mode control unit 22, a driving control unit 23, a work machine control unit 24, and a display control unit 25. Details about each functional unit 22-25 will be described later.

[0039] Furthermore, in this embodiment, the functional units 22-25 of the control device 2 are implemented by the arithmetic unit performing program-based arithmetic processing, i.e., implemented by software. However, this is an example, and the functions of the functional units can also be implemented by other methods. At least some of the functional units 22-25 can also be implemented using, for example, ASICs (Application Specific Integrated Circuits), FPGAs (Field Programmable Gate Arrays), etc. That is, at least some of the functional units 22-25 can also be implemented by hardware using dedicated ICs, etc. In addition, at least some of the functional units 22-25 can also be implemented by combining software and hardware. In addition, the functional units 22-25 are conceptual components. The functions performed by one component can also be distributed among multiple components. In addition, the functions of multiple components can also be integrated into one component.

[0040] Furthermore, the control device 2 can be a single piece of hardware or multiple pieces of hardware capable of communicating with each other. For example, the work vehicle 1 may also be equipped with a remote operation device (not shown) that can be remotely operated by an operator located away from the vehicle body 11. In this case, the control device 2 may be configured only on the vehicle body 11, or it may be configured separately on the vehicle body 11 side and the remote operation device side. In addition, the remote operation device is a device that can communicate with the vehicle body 11, such as a tablet terminal, smartphone, laptop computer, or remote control.

[0041] Alternatively, the control device 2 can be configured to communicate with a server device via a network such as the Internet. In this case, some of the functions of the control device 2 can also be implemented by the server device. Furthermore, some of the information stored in the storage unit 21 can also be stored in the server device.

[0042] like Figure 2As shown, the work vehicle 1, in addition to the control device 2, also has elements 3 to 5 that are directly or indirectly connected to the control device 2. These elements 3 to 5 can be connected to the control device 2, for example, via wired or wireless means. In addition, these elements 3 to 5 can also be connected via wired or wireless means to a device that can communicate with the control device 2 (such as the aforementioned remote operation device, server device, etc.), and indirectly connected to the control device 2 via this communicative device.

[0043] Sensor 3 detects information related to the work vehicle 1 and outputs the detected information to the control device 2. Specifically, multiple sensors 3 are mounted on the work vehicle 1. Each of the multiple sensors 3 outputs the detected information to the control device 2. Sensors 3 are mounted, for example, on the vehicle body 11 or the work machine 12. Furthermore, sensors 3 may also be installed in devices that can be used remotely from the vehicle body 11 (such as the aforementioned remote operation device). Examples of the multiple sensors 3 include a speed sensor for detecting the speed of the work vehicle 1, a steering angle sensor for detecting the steering angle using the steering wheel 16b, a GNSS (Global Navigation Satellite System) sensor for detecting the position of the work vehicle 1, a sensor for detecting the rotational speed of the engine 15, an operation position detection sensor for detecting the operation position of the aforementioned acceleration operation component, and a lever position sensor for detecting the position of the main or auxiliary gear lever.

[0044] The operation unit 4 allows an operator to issue commands to the control device 2. In this embodiment, the operation unit 4 includes multiple operating devices. The operation unit 4 is, for example, provided on the vehicle body 11. However, if the work vehicle 1 has a structure with a remote operating device, at least some of the operating devices constituting the operation unit 4 may also be included in the remote operating device. The operation unit 4 may be, for example, a button, a lever, a dial, or a touch panel.

[0045] like Figure 2 As shown, in this embodiment, the operation unit 4 includes a touch panel TP. Furthermore, the touch panel TP is also included in the display unit 5, thus possessing the functions of both an input device and a display device. Details regarding the touch panel TP will be described later. Additionally, in this embodiment, the operation unit 4 includes an A / B switch 41, an engine speed / vehicle speed switch 42, and an engine speed / vehicle speed setting dial 43. Details regarding the A / B switch 41, the engine speed / vehicle speed switch 42, and the engine speed / vehicle speed setting dial 43 will also be described later.

[0046] The display unit 5 displays information appropriately according to instructions from the control device 2. In this embodiment, the display unit 5 includes multiple display devices. The display unit 5 is provided, for example, on the vehicle body 11. However, if the work vehicle 1 has a structure with a remote operation device, at least some of the display devices constituting the display unit 5 may also be included in the remote operation device.

[0047] In this embodiment, the display unit 5 includes an instrument panel 51 and a touch panel TP.

[0048] Figure 3 This is a schematic diagram showing the structure of the instrument panel 51. The instrument panel 51 is located in front of the steering wheel 16b of the driver's compartment 16. Figure 3 As shown, the instrument panel 51 displays information including a speedometer 51a, a fuel gauge 51b, and a coolant temperature gauge 51c. Additionally, the instrument panel 51 includes a central display 51d, which is composed of an LCD screen or similar device. The central display 51d displays various information related to the work vehicle 1. For example, the central display 51d displays engine load rate, odometer readings, and mileage. Furthermore, the central display 51d inserts and displays the set values ​​for the work vehicle 1's maximum speed and maximum engine rotation speed. This will be described later.

[0049] A touch panel TP is disposed, for example, around the driver's seat 16a. The operator can use the touch panel TP to confirm and input various settings related to the work vehicle 1. Furthermore, in this embodiment, the touch panel TP can be used to display and change the set values ​​of the work vehicle 1's maximum speed and maximum engine rotation speed (maximum engine RPM). Details regarding this will be described later.

[0050] Figure 4 This is a block diagram illustrating the functions of the Touch Panel Control Unit (TPC) within the touch panel (TP). Furthermore, the Touch Panel Control Unit (TPC) is a computer device equipped with an arithmetic unit, including a processor. The functions of the Touch Panel Control Unit (TPC) are implemented by the processor executing arithmetic operations according to a program. For example... Figure 4 As shown, the touch panel control unit TPC includes a receiving unit TP-1, a display processing unit TP-2, and a transmitting unit TP-3 as functional units.

[0051] The receiving unit TP-1 receives touch operations from the operator on the touch panel TP. The display processing unit TP-2 performs display processing corresponding to the operator's touch operations and display processing corresponding to instructions from the control device 2. The sending unit TP-3 sends the instruction content (instruction information) based on the operator's touch operations to the control device 2.

[0052] Furthermore, the touch panel TP can be a structure installed on the vehicle body 11, or it can be a structure assembled on a portable device that can be brought into or taken out of the vehicle body 11. The portable device can be, for example, the remote operation device described above. Additionally, the functions implemented by the touch panel TP of this embodiment can also be implemented through a combination of separately configured input devices and display devices.

[0053] Return to Figure 2 A summary of the functions of control device 2 will be provided.

[0054] The driving mode control unit 22 performs control processing related to multiple driving modes, each with a different combination of the setpoints for the maximum vehicle speed and the maximum engine speed of the work vehicle 1. Specifically, the driving mode control unit 22 performs switching control of multiple driving modes. In other words, the work vehicle 1 is equipped with multiple driving modes, each with a different combination of the setpoints for the maximum vehicle speed and the maximum engine speed. The driving mode control unit 22 performs driving mode switching processing according to the operator's instructions, or automatically performs driving mode switching processing if automatic switching is enabled.

[0055] In this embodiment, the multiple driving modes consist of mode A (first mode) and mode B (second mode). For example, the operator can use mode A for operation and mode B for turning, or mode A for rotary operation and mode B for plowing operation. The driving mode control unit 22 executes the switching from mode A to mode B and the switching from mode B to mode A either automatically or according to the operator's instructions.

[0056] The driving control unit 23 controls the driving system of the work vehicle 1. For example, the driving control unit 23 controls the driving of the work vehicle 1 according to the driving mode determined by the control action of the driving mode control unit 22.

[0057] The driving control unit 23 controls the operation of the transmission device 19 to make the speed of the work vehicle 1 corresponding to the operating position of the main gear lever. At this time, the driving control unit 23 controls the operation to limit the vehicle speed when the main gear lever is operated at its maximum to the maximum speed corresponding to the set driving mode. Additionally, the driving control unit 23 controls the operation of the engine 15 to make the output rotational speed (output RPM) of the engine 15 corresponding to the operating position of the acceleration operation component. At this time, the driving control unit 23 controls the operation to limit the target engine rotational speed (target engine RPM) when the acceleration operation component is operated at its maximum to the maximum engine rotational speed (maximum engine RPM) corresponding to the set driving mode.

[0058] Alternatively, the speed, steering, and other indication information used by the driving control unit 23 may be obtained by the operator manually operating the control components (steering wheel, levers, pedals, etc.) provided on the driver's unit 16. However, if the work vehicle 1 has an automatic driving function, the speed, steering, and other indication information used by the driving control unit 23 may also be information calculated by the control device 2 using information obtained from the sensor 3.

[0059] The work machine control unit 24 controls the work system of the work vehicle 1 based on the input operation information related to the work machine 12. This control includes, for example, lifting control of the work machine 12 and switching control of power transmission to the work machine 12 via the PTO power transmission unit. Alternatively, the operation information related to the work machine 12 can be obtained by the operator manually operating the control components (lever, pedal, etc.) provided on the driver's unit 16. However, if the work vehicle 1 has automatic driving functions including automatic control of the work machine 12, the operation information related to the work machine 12 can also be information obtained by the control device 2 based on information from the sensor 3.

[0060] The display control unit 25 controls the display unit 5 based on information obtained from the sensor 3 and the operation unit 4, as well as information obtained from other control units 22-24. Specifically, the display control unit 25 controls the display of the instrument panel 51 and the touch panel TP.

[0061] <2. Setting the maximum vehicle speed and maximum engine speed>

[0062] Next, details regarding the setting of the maximum vehicle speed and the maximum engine rotation speed of the work vehicle 1 in this embodiment will be explained in detail. In this embodiment, the maximum vehicle speed and the maximum engine rotation speed can be set using the display device provided with the work vehicle 1 and the operating components arranged on the side of the driver's seat 16a of the work vehicle 1. These will be explained in turn below.

[0063] [2-1. Utilizing the structure of the operating components]

[0064] As described above, the work vehicle 1 in this embodiment is configured to allow changing the set values ​​of the maximum vehicle speed and the maximum engine speed using the operating components. Specifically, the operating components consist of multiple operating parts. These multiple operating parts include an A / B switch 41, an engine speed / vehicle speed switch 42, and an engine speed / vehicle speed setting dial 43 (all refer to...). Figure 2 )constitute.

[0065] Figure 5 This is a top view showing the approximate structure around the driver's seat 16a. (Example) Figure 5 As shown, an armrest 16c is provided on the right side of the driver's seat 16a. The main gear lever 16d is provided at the front end of the armrest 16c. Figure 6 This is a three-dimensional diagram showing the general structure of the main shift lever 16d.

[0066] like Figure 5 and Figure 6 As shown, the A / B switch 41 is located on the right side of the main gear lever 16d. The engine speed / vehicle speed switch 42 and the engine speed / vehicle speed setting dial 43 are located on the upper surface of the front part of the armrest 16c. The engine speed / vehicle speed switch 42 and the engine speed / vehicle speed setting dial 43 are arranged in a front-rear arrangement, with the engine speed / vehicle speed setting dial 43 in front and the engine speed / vehicle speed switch 42 behind. Figure 5 and Figure 6 As can be seen, the operating components 41-43, which can change the setting values ​​of the maximum vehicle speed and the maximum engine rotation speed, are arranged on the side (specifically, the right side) of the driver's seat 16a. The operating components 41-43, which can change the setting values ​​of the maximum vehicle speed and the maximum engine rotation speed, are positioned in a location that is easy to operate even when the work vehicle 1 is in operation.

[0067] The A / B switch 41 is a button-type switch (push-button switch) that allows switching between A and B modes by pressing it in the left or right direction. When the A / B 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 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.

[0068] The engine rotation / vehicle speed switch 42 is an interactive switch that allows selection of whether to change the setting value of engine rotation speed or vehicle speed. When the engine rotation / vehicle speed switch 42 is tilted to one side in the left or right direction, the setting value of the maximum vehicle speed can be changed; when the engine rotation / vehicle speed switch 42 is tilted to the other side in the left or right direction, the setting value of the maximum engine rotation speed can be changed.

[0069] The engine speed / vehicle speed setting dial 43 is a dial-type operating component that adjusts the engine speed or vehicle speed to a target upper limit value. By rotating the engine speed / vehicle speed setting dial 43, the setting value can be changed. For example, rotating the engine speed / vehicle speed setting dial 43 clockwise increases the set upper limit value, and rotating it counterclockwise decreases the set upper limit value. Furthermore, the upper limit value for engine speed corresponds to the aforementioned maximum engine speed, and the upper limit value for vehicle speed corresponds to the aforementioned maximum vehicle speed.

[0070] In detail, the engine rotation / vehicle speed setting dial 43 can change the upper limit value of the engine rotation speed and vehicle speed of the driving mode selected by the A / B switch 41, specifically the side selected as the change target by the engine rotation / vehicle speed switch 42. For example, if mode B is selected by the A / B switch 41 and engine rotation speed is selected as the change target by the engine rotation / vehicle speed switch 42, rotating the engine rotation / vehicle speed setting dial 43 can change the upper limit value (maximum engine rotation speed) of the engine rotation speed in mode B.

[0071] In this embodiment, when any one of the three operating components 41 to 43 is operated, the central display 51d (see reference 51d) included in the instrument panel 51 will be activated. Figure 3The maximum vehicle speed and maximum engine speed settings are inserted into the display. Here, "insertion display" refers to a display that temporarily appears to replace the normal display. If, while the insertion display is displayed, none of the multiple operating components 41 to 43 are operated for a certain period of time, the insertion display ends. When the insertion display ends, the display on the central display 51d returns to the normal display state (normal display).

[0072] Figure 7 This is a schematic diagram illustrating the insertion display of the central display 51d. Figure 7 In the diagram, "A" represents Mode A, and "B" represents Mode B. Next to the vertically arranged "A" and "B" signs, from left to right, are the settings for maximum vehicle speed and maximum engine speed. The settings next to "A" represent the currently set maximum vehicle speed and maximum engine speed in Mode A. The settings next to "B" represent the currently set maximum vehicle speed and maximum engine speed in Mode B.

[0073] In the insertion display of the central display 51d, the mode (driving mode) of the currently selected side in the work vehicle 1 within modes A and B is displayed as white text on a black background. Conversely, the mode of the unselected side in the work vehicle 1 within modes A and B is displayed as black text on a white background. Furthermore, this display format is merely an example; other displays are possible as long as the operator can easily identify the currently selected mode. In this embodiment, considering that the background color of the central display 51d is white, the display of the currently selected mode is set to a structure of white text on a black background to make the currently selected mode prominently displayed.

[0074] exist Figure 7In the example shown, the operator can identify that Mode A is currently selected by observing the central display 51d. With Mode A selected, the operator tilts the engine speed / vehicle speed switch 42 to one side (left or right) to select vehicle speed as the switching target. Then, by rotating the engine speed / vehicle speed setting dial 43, the operator can change the maximum vehicle speed of Mode A from 20 km / h to another value. Furthermore, since the change in the maximum vehicle speed setting is reflected on the central display 51d, the operator can set the target maximum vehicle speed while observing the central display 51d. Alternatively, with Mode A selected, the operator tilts the engine speed / vehicle speed switch 42 to the other side (left or right) to select engine speed as the switching target. Then, by rotating the engine speed / vehicle speed setting dial 43, the operator can change the maximum engine speed of Mode A from 2000 rpm to another value. Furthermore, since changes to the maximum engine rotation speed setting are reflected on the central display 51d, operators can set the target maximum engine rotation speed while observing the central display 51d.

[0075] When mode A is selected, pressing the A / B switch 41 switches the driving mode to mode B. The mode B display shows white text on a black background. Conversely, mode A displays black text on a white background. In this state, tilting the engine speed / vehicle speed switch 42 to one side selects the vehicle speed. By rotating the engine speed / vehicle speed setting dial 43, the operator can change the maximum vehicle speed in mode B from 10 km / h to other values. Furthermore, when mode B is selected, tilting the engine speed / vehicle speed switch 42 to the other side selects the maximum engine speed. By rotating the engine speed / vehicle speed setting dial 43, the operator can change the maximum engine speed in mode B from 1000 rpm to other values.

[0076] As explained above, changing the settings for the maximum vehicle speed and maximum engine speed using operating components 41-43 can sometimes require more operations. For example, suppose mode A is selected, and the engine speed / vehicle speed switch 42 is used to switch the vehicle speed. In this case, to change the setting for the maximum engine speed in mode B, it is necessary to operate all of the A / B switch 41, the engine speed / vehicle speed switch 42, and the engine speed / vehicle speed setting dial 43. Therefore, the operator may find the operation complex or difficult to master. Considering this, in this embodiment, the settings for the maximum vehicle speed and maximum engine speed can be changed not only using operating components 41-43 but also using a display device.

[0077] [2-2. Utilizing the structure of a display device]

[0078] In this embodiment, the display device capable of setting and changing the maximum vehicle speed and maximum engine rotation speed is the aforementioned touch panel TP (see reference). Figure 2 However, if an operating device (input device) is provided that allows operation of the display device's screen via methods other than touch operation, the display device capable of changing the settings for maximum vehicle speed and maximum engine speed does not need to have touch-based input functionality. That is, the display device capable of changing the settings for maximum vehicle speed and maximum engine speed can also be composed of a device other than a touch panel.

[0079] Figure 8 This is an example diagram showing the screen displayed on the touch panel (TP). For example... Figure 8 As shown, the touch panel TP (display device) is configured to display a setting confirmation screen S1, which displays a maximum vehicle speed display area R1 for displaying the setting value of the maximum vehicle speed and a maximum engine rotation speed display area R2 for displaying the setting value of the maximum engine rotation speed.

[0080] Additionally, the setting confirmation screen S1 includes: a maximum vehicle speed operation area R3, which is displayed side by side with the maximum vehicle speed display area R1, and the maximum vehicle speed setting can be changed; and a maximum engine speed operation area R4, which is displayed side by side with the maximum engine speed display area R2, and the maximum engine speed setting can be changed.

[0081] With this structure, the operator can easily change the settings for the maximum vehicle speed and maximum engine speed by displaying a screen S1 that shows the set values. Furthermore, since the operation areas R3 and R4 for changing the settings are arranged side-by-side with the display areas R1 and R2, the operator can intuitively perform the operation to change the settings for the maximum vehicle speed and maximum engine speed. In other words, the structure of this embodiment improves the convenience of setting the maximum vehicle speed and maximum engine speed in the work vehicle 1.

[0082] In detail, the setting confirmation screen S1 displays 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 for each of the multiple driving modes. With this structure, the maximum vehicle speed and maximum engine speed settings for each driving mode can be set centrally by displaying only one screen S1, thus reducing the burden on the operator during the setting process.

[0083] Furthermore, in this embodiment, the setting of the maximum vehicle speed and the maximum engine rotation speed can be selectively achieved using either the setting method employing the operating components 41-43 or the setting method employing the touch panel TP. The work vehicle 1 can also be configured to have only a structure that allows for simple setting operations using the touch panel TP. However, by adopting a structure like this embodiment that allows for setting operations using the operating components 41-43, the method using the operating components 41-43 can be used, for example, in situations where setting operations using the touch panel TP are difficult, such as when attention needs to be paid to the front of the work vehicle 1. In other words, by configuring it as in this embodiment, the convenience of setting the maximum vehicle speed and the maximum engine rotation speed can be improved.

[0084] In addition, in this embodiment, the setting confirmation screen S1 is configured to be displayed via screen switching operation of the touch panel TP. Figure 9 This is a diagram illustrating the screen switching operations of a touch panel (TP). Figure 9 The example shown is based on the premise that the homepage screen S10 is initially displayed.

[0085] The operator touches one of the multiple software buttons SB displayed on the main screen S10 that relates to setting the maximum vehicle speed and the maximum engine rotation speed. This displays the tractor setting screen S11. When the tractor setting screen S11 is displayed, the operator touches one of the multiple software buttons SB displayed on the tractor setting screen S11 that relates to setting the maximum vehicle speed and the maximum engine rotation speed. This displays a setting confirmation screen S1 (specifically, an AB mode setting screen) that allows setting the maximum vehicle speed and the maximum engine rotation speed.

[0086] In this structure, by observing the icon displayed on the screen along with the software button SB and performing intuitive operations, one can easily reach the target setting confirmation screen S1. Figure 9 In the example shown, the setup confirmation screen S1 is accessed from the home screen S10 via another screen S11, but this is just an example. It can also be configured to access the setup confirmation screen S1 by performing a single touch operation on the home screen S10, or it can be configured to access the setup confirmation screen S1 from the home screen S10 via multiple screens.

[0087] In addition to the screen switching operation of the touch panel TP, the work vehicle 1 of this embodiment also has operating components for displaying the setting confirmation screen S1. Specifically, these operating components are the aforementioned A / B switch 41, engine speed / vehicle speed switch 42, and engine speed / vehicle speed setting dial 43. When any of these operating components 41 to 43 is operated, the setting confirmation screen S1 is displayed not only in the aforementioned central display 51d but also on the touch panel TP. By adopting this structure, the operating components 41 to 43 can be used as pseudo-shortcut buttons for screen switching, quickly displaying the setting confirmation screen S1.

[0088] Furthermore, in this embodiment, specifically, the setting confirmation screen S1 is displayed only when the display settings for maximum vehicle speed and maximum engine speed are valid in the display settings of the touch panel TP. That is, for the touch panel TP to display the setting values ​​for maximum vehicle speed and maximum engine speed, the display settings for maximum vehicle speed and maximum engine speed being valid is a prerequisite. However, this is just an example, and it is also possible to not set such a valid / invalid switching setting, and instead set the setting confirmation screen S1 to always be displayed.

[0089] Furthermore, in this embodiment, if no operation is performed on either the operation components 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 preceding) the setting confirmation screen S1. In this configuration, for example, after the setting confirmation screen S1 is displayed, if the operator confirms that no setting change, such as the maximum vehicle speed, is required, or after the operator has completed the setting change, the system can automatically return to the previously displayed screen (the original screen). As one scenario where the setting confirmation screen S1 is displayed, consider the case where the work vehicle 1 is performing work. Therefore, according to the configuration of this embodiment, it is convenient to automatically return to the screen previously used for work after the setting confirmation screen S1 is displayed. Examples of screens previously used for work include those displayed during automatic steering operation.

[0090] Furthermore, in this embodiment, if any one of the A / B switch 41, engine rotation / vehicle speed switch 42, engine rotation / vehicle speed setting dial 43, and touch panel TP is operated within a specified time after the setting confirmation screen S1 is displayed, the display time of the setting confirmation screen S1 is extended. With this structure, time can be provided to the operator who has changed the setting value to confirm the changed setting value.

[0091] Here, refer to Figure 8 The details of the setting confirmation screen S1 will be explained. Furthermore, when explaining the setting confirmation screen S1, the following will be used... Figure 8 The setup confirmation screen S1 shown uses the terms up, down, left, and right as a reference. The up, down, left, and right directions used in the description of the setup confirmation screen S1 may not be the same as the up, down, left, and right directions previously defined for the overall description of the work vehicle 1.

[0092] like Figure 8 As shown, in addition to the aforementioned 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, the setting confirmation screen S1 also has display areas. The setting confirmation screen S1 also includes a title display area R5, a setting content description area R6, an AB mode display area R7, a setting object display area R8, an A / B automatic switching selection area R9, a precautions display area R10, and a screen switching icon display area R11.

[0093] The title display area R5 is set up to display the title of the selected screen content, ensuring that the operator can easily and simply grasp its contents. The title display area R5 is a horizontally elongated rectangle, positioned at the top of the rectangular screen. Figure 8 In the example shown, the title display area R5 of the setting confirmation screen S1 displays "AB Mode Setting" as the title.

[0094] The setting description area R6 is the area that specifically displays the content of the setting items shown on the setting confirmation screen S1. The setting description area R6 is located below the title display area R5. Specifically, the setting description 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 for displaying a first icon R6b1 associated with the maximum vehicle speed setting, and an area for displaying a second icon R6b2 associated with the maximum engine speed setting. The first icon R6b1 and the second icon R6b2 are displayed with a left-right gap, with the first icon R6b1 on the left and the second icon R6b2 on the right.

[0095] The AB mode display area R7 shows whether the selected driving mode is A or B. It is located below the setting description area R6 and near the left edge of the screen. The AB mode display area R7 arranges the letters "A" above and "B" below, vertically oriented. Furthermore, it displays a circle to the left of each letter "A" and "B." The display pattern of this circle changes depending on which driving mode (A or B) is selected.

[0096] When mode A is selected as the driving mode, the circle to the left of the letter "A" is filled in, while the circle to the left of the letter "B" is not filled in. When mode B is selected as the driving mode, the circle to the left of the letter "A" is not filled in, while the circle to the left of the letter "B" is filled in. Figure 8 In the example shown, the circle to the left of the letter "A" is filled in. That is, Figure 8 This is the setting confirmation screen S1 when mode A is selected as the driving mode. Furthermore, the AB mode display area R7 can also be an area where mode A and mode B can be selected via touch operation.

[0097] The setting target display area R8 is used to notify the operator of the item selected for changing the setting value of the engine speed / vehicle speed setting dial 43. The setting target display area R8 is set in conjunction with the aforementioned 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. Therefore, before explaining the details of the setting target display area R8, the details of 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 will be explained.

[0098] The maximum speed display area R1 is a horizontally elongated rectangular area. Specifically, the maximum speed display area R1 includes a first maximum speed display area R1a for displaying the maximum speed in mode A, and a second maximum speed display area R1b for displaying the maximum speed in mode B. The first maximum 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 associated with the maximum speed setting. The second maximum 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 configuration, the operator can easily identify which setting value is being displayed, using the letters "A," "B," and the first icon R6b1 as markers. Furthermore, the second maximum speed display area R1b is located below the first maximum speed display area R1a.

[0099] The maximum engine speed display area R2 is a horizontally elongated rectangular area. Specifically, the maximum engine speed display area R2 includes a first maximum engine speed display area R2a for displaying the maximum engine speed in mode A, and a second maximum engine speed display area R2b for displaying the maximum engine speed in mode B. The first maximum engine speed display area R2a is positioned to the right of the letter "A" in the AB mode display area R7 and below the second icon R6b2 associated with the maximum engine speed setting. The second maximum engine speed display area R2b is positioned to the right of the letter "B" in the AB mode display area R7 and below the second icon R6b2. With this configuration, the operator can easily identify which setting value is being displayed, using the letters "A," "B," and the second icon R6b2 as markers. Furthermore, the second maximum engine speed display area R2b is positioned below the first maximum engine speed display area R2a.

[0100] The maximum speed operation area R3 is arranged in a left-right direction relative to the maximum speed display area R1. As described above, the maximum speed display area R1 includes a first maximum speed display area R1a and a second maximum speed display area R1b. The maximum speed operation area R3 is arranged in a left-right direction relative to each of the first maximum speed display area R1a and the second maximum speed display area R1b. Specifically, the maximum speed operation area R3 includes a rectangular maximum speed reduction area R3a that decreases the set value by touch operation, and a rectangular maximum speed increase area R3b that increases the set value by touch operation. For each of the first maximum speed display area R1a and the second maximum speed display area R1b, the maximum speed reduction area R3a is arranged on the left and the maximum speed increase area R3b is arranged on the right.

[0101] Touching the maximum speed reduction area R3a, located to the left of the first maximum speed display area R1a, decreases 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, increases 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, decreases 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, increases the set value of the second maximum speed display area R1b.

[0102] The maximum engine speed operation area R4 is arranged in a left-right direction relative 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 operation area R4 is arranged in a left-right direction relative to each of the first maximum engine speed display area R2a and the second maximum engine speed display area R2b. Specifically, the maximum engine speed operation area R4 includes a rectangular maximum engine speed reduction area R4a, which decreases the set value by touch operation, and a rectangular maximum engine speed increase area R4b, which increases the set value by touch operation. For 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 arranged on the left and the maximum engine speed increase area R4b is arranged on the right.

[0103] Touching the maximum engine speed reduction area R4a, located to the left of the first maximum engine speed display area R2a, decreases the set 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, increases the set 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, decreases the set 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, increases the set value of the second maximum engine speed display area R2b.

[0104] Furthermore, in this embodiment, as a preferred embodiment, the maximum vehicle speed operation area R3 and the maximum engine speed operation area R4 display icons indicating the method of changing the set value. Specifically, in the maximum vehicle speed reduction area R3a constituting the maximum vehicle speed operation area R3, a minus sign icon "-" associated with reduction is displayed, and in the maximum vehicle speed increase area R3b, a plus sign icon "+" associated with increase is displayed. Similarly, in the maximum engine speed reduction area R4a constituting the maximum engine speed operation area R4, a minus sign icon "-" associated with reduction is displayed, and in the maximum engine speed increase area R4b, a plus sign icon "+" associated with increase is displayed. By displaying icons indicating (associated) the method of change in each operation area R3 and R4 in this way, intuitive operation can be performed, improving the operability for the operator. In addition, the icons indicating increase and decrease are not limited to "+" and "-", for example, arrows can also be used.

[0105] The setting object display area R8 is for each of the first maximum vehicle speed display area R1a, the second maximum vehicle speed display area R1b, the first maximum engine speed display area R2a, and the second maximum engine speed display area R2b. That is, there are four setting object display areas R8. The four setting object display areas R8 have the same shape, specifically, they are horizontally elongated rectangles.

[0106] The first settable display area R8a is configured to surround the first maximum vehicle speed display area R1a, and the maximum vehicle speed reduction area R3a and the maximum vehicle speed increase area R3b located to its left and right. The second settable display area R8b is configured to surround the second maximum vehicle speed display area R1b, and the maximum vehicle speed reduction area R3a and the maximum vehicle speed increase area R3b located to its left and right. The third settable display area R8c is configured to surround the first maximum engine speed display area R2a, and the maximum engine speed reduction area R4a and the maximum engine speed increase area R4b located to its left and right. The fourth settable display area R8d is configured to surround the second maximum engine speed display area R2b, and the maximum engine speed reduction area R4a and the maximum engine speed increase area R4b located to its left and right.

[0107] The display areas R8a-R8d for each setting target differ depending on whether they are selected as the target for a change operation. When each setting target display area R8a-R8d is selected as the target for a change operation using the engine rotation / vehicle speed setting dial 43, the portion excluding the setting value display areas R1 and R2 and the operation areas R3 and R4 becomes fully filled. When each setting target display area R8a-R8d is not selected as the target for a change operation using the engine rotation / vehicle speed setting dial 43, it remains unfilled. Figure 8 In the example shown, the first setting object display area R8a is filled in, and the maximum speed setting value of mode A can be changed using the engine rotation / vehicle speed setting dial 43.

[0108] In addition, when using the touch panel TP, for items whose display area R8 is not filled, settings can also be changed using the operation areas R3 and R4.

[0109] The A / B automatic switching selection area R9 is an area where the automatic switching between A mode and B mode can be selected as active or inactive. Furthermore, it is assumed here that A mode is used as the driving mode during operation, and B mode is used as the driving mode during turning. When A / B automatic switching is enabled, automatic switching between A mode and B mode is performed, for example, by detecting the raising or lowering of the work machine 12. The raising or lowering of the work machine 12 is detected, for example, by the operation of the work machine raising / lowering switch. When the work machine 12 is raised from the working state of the work vehicle 1, the A / B automatic switching is activated, and the driving mode automatically switches from A mode to B mode. Conversely, when the work vehicle 1 finishes turning and the work machine 12 is lowered, the A / B automatic switching is activated, and the driving mode automatically switches from B mode to A mode.

[0110] Furthermore, the steering angle of the steering wheel 16b can be used to detect whether the work vehicle 1 is moving from work driving to turning driving or from turning driving to work driving. Additionally, in this embodiment, when A / B automatic switching is performed, a screen displaying the settings for maximum vehicle speed and maximum engine rotation speed is displayed in an interleaved manner on the central display 51d and the touch panel TP. The above settings are displayed on the central display 51d. Figure 7 The screen shown. Additionally, the setting confirmation screen S1 is displayed on the touch panel TP.

[0111] The A / B automatic switching selection area R9 is set below the setting object display area R8 in the setting confirmation screen S1. Figure 8 In the example shown, the A / B auto-switching selection area R9 consists of a rectangular area R9a extending horizontally and a circular area R9b disposed within the rectangular area R9a. By touching the screen, the circular area R9b can be moved left or right within the rectangular area R9a, thereby toggling the A / B auto-switching function between active and inactive. Figure 8 In the example shown, when the circular region R9b is positioned to the right of the rectangular region R9a, A / B automatic switching becomes active. That is, Figure 8 This indicates the screen state when the operator has selected the A / B automatic switching option. On the other hand, when the circular area R9b is positioned to the left of the rectangular area R9a, the A / B automatic switching option becomes disabled.

[0112] In addition, Figure 8 In the example shown, when the circular area R9b is positioned in the active A / B auto-switching setting, the rectangular area R9a is fully painted. Conversely, when the circular area R9b is positioned in the inactive A / B auto-switching setting, the rectangular area R9a is not fully painted. This configuration allows the operator to immediately determine whether the A / B auto-switching setting is active or inactive.

[0113] As can be seen from the above, in this embodiment, the setting confirmation screen S1 displays an automatic switching requirement selection area (A / B automatic switching selection area R9) where the user can select whether automatic switching between the first driving mode (Mode A) and the second driving mode (Mode B) is required. With this structure, the operator can easily decide whether to utilize automatic driving mode switching based on their preference, making it convenient for the operator.

[0114] The precautions display area R10 is used to display precautions when A / B automatically switches to active mode. Figure 8In the example shown, as a precaution, a notice is displayed regarding the situation where the maximum speed setting for Mode B is higher than that for Mode A. Specifically, if the maximum speed setting for Mode B is higher than that for Mode A, a confirmation screen is displayed before automatic switching.

[0115] Figure 10 This diagram illustrates an example of a confirmation screen S2 displayed before automatic A / B switching. Specifically, when the conditions for automatic switching from mode A to mode B are met, and the maximum speed setting for mode B is higher than the maximum speed setting for mode A, this confirmation screen S2 is displayed as an insert on the touch panel TP. Figure 10 As shown, the switch from mode A to mode B is initiated only when the operator presses the A / B switch 41. That is, if the operator does not press the A / B switch 41, mode A remains in place. When the operator presses the A / B switch 41, the switch from mode A to mode B is initiated, and the touch panel TP returns to the state before the confirmation screen S2 was displayed. This structure prevents the driving mode from being automatically switched when transitioning from operational driving to turning driving, without the operator recognizing the potential for acceleration due to the automatic change in driving mode. In other words, it improves the safety of the work vehicle 1.

[0116] The screen switching icon display area R11 is configured to allow for easy switching from the setting confirmation screen S1 to other screens. The screen switching icon display area R11 is located below the notice display area R10 and at the bottom of the setting confirmation screen S1. Within the screen switching icon display area R11, multiple icons, such as those representing the home screen, are arranged horizontally. When an area displaying an icon is touched, the touch panel TP switches to the screen corresponding to the touched icon.

[0117] [2-3. Variations]

[0118] Figure 11 This diagram illustrates the setting confirmation screen S1A displayed in the touch panel TP, as described in the modified example. The setting confirmation screen S1A in the modified example displays the setting confirmation screen S1 according to the above embodiment (see reference). Figure 8 The growth rate confirmation selection area R12 is not included in the data.

[0119] The speed increase confirmation selection area R12 is an area where speed increase confirmation can be selected when A / B automatic switching is enabled. When speed increase confirmation is performed, a confirmation screen S2 is displayed, similar to the implementation described above (see [reference]). Figure 10Hereinafter, this confirmation screen S2 will sometimes be referred to as the speed-up confirmation screen S2. The speed-up confirmation selection area R12 is located to the right of the A / B auto-switching selection area R9. The speed-up confirmation selection area R12 has the same structure as the A / B auto-switching selection area R9, consisting of a rectangular area R12a extending in the left-right direction and a circular area R12b disposed within the rectangular area R12a. By touching the screen, the circular area R12b can be moved left-right within the rectangular area R12a, thereby toggling whether speed-up confirmation is performed.

[0120] Furthermore, the speed increase confirmation selection area R12 is only required when A / B automatic switching is enabled. Therefore, if A / B automatic switching is disabled, the speed increase confirmation selection area R12 cannot be operated. In cases where operation is not possible, it is preferable to notify the operator of this situation; alternatively, a structure that grays out the speed increase confirmation selection area R12 may be used.

[0121] Figure 11 This indicates that the speed increase confirmation selection area R12 has been selected. In this case, similar to the above implementation, if the automatic switching conditions from mode A to mode B are met, and the maximum speed setting for mode B is higher than the maximum speed setting for mode A, the speed increase confirmation screen S2 (see reference) is displayed. Figure 10 When the speed increase confirmation screen S2 is displayed, as described above, the switch from mode A to mode B is only performed when the operator presses the A / B switch 41. That is, when the speed increase confirmation state is selected, the driving mode control unit 22 (see reference) Figure 2 The system processes confirmation requests from operators requesting the use of the A / B switch 41. On the other hand, it handles confirmation requests from... Figure 11 When the operator moves the circular area R12b in the speed increase confirmation selection area R12 to the left, and selects not to perform speed increase confirmation, even if the maximum speed setting in mode B is higher than the maximum speed setting in mode A, the speed increase confirmation screen S2 will not be displayed, and the system will automatically switch from mode A to mode B. That is, when speed increase confirmation is not performed, the driving mode control unit 22 does not perform the confirmation request processing (operation of the A / B switch 41) that requests confirmation by displaying the speed increase confirmation screen S2.

[0122] As can be seen from the above, in this modified example, when automatic switching (A / B automatic switching) is selected, a confirmation selection area (speed confirmation selection area R12) is displayed on the setting confirmation screen S1. The confirmation selection area (speed confirmation selection area R12) can select whether to process a confirmation request from the operator (user) before automatic switching based on the relationship between the maximum speed settings of the first driving mode (Mode A) and the second driving mode (Mode B). With this structure, the possibility of operators familiar with the operation of the work vehicle 1 finding the display and the associated operations cumbersome can be reduced.

[0123] Furthermore, in this modified example, as a preferred method, when growth rate confirmation is disabled (growth rate confirmation off) in the selection area R12, the following is displayed: Figure 12 The reconfirmation screen S3 shown is as depicted. Furthermore... Figure 12 This is a diagram illustrating the structure of the reconfirmation screen S3 that appears when the option to not confirm the speed increase is selected.

[0124] The reconfirmation screen S3 displays important notes for when speed-up confirmation is not performed, requesting the operator's understanding and agreement to these notes. If the operator does not agree to the notes displayed on the reconfirmation screen S3, the speed-up confirmation function cannot be disabled. In addition to the notes, the reconfirmation screen S3 also includes a selection area for choosing whether to disable the speed-up confirmation function (the area displaying "Yes" or "No" in the figure). Touching "Yes" in this selection area is equivalent to agreeing to the above.

[0125] In this modified example, the following two points should be noted. First, the speed increase confirmation function can only be deactivated when the operator is seated. That is, the operator can only select "Yes" on the reconfirmation screen S3 while seated in the driver's seat 16a. Second, if the work vehicle 1 is turned off or the operator leaves the driver's seat 16a, the speed increase confirmation function automatically becomes active. In other words, even if the speed increase confirmation function is temporarily deactivated, it will automatically reactivate when the operator leaves the seat or the engine is turned off. With this configuration, if the operator of the work vehicle 1 is changed to someone else, the speed increase confirmation function will definitely automatically reactivate, thus preventing the speed increase confirmation function from being deactivated without the operator's knowledge.

[0126] The operator's (user's) seating and alighting from the driver's seat 16a are performed, for example, using sensors such as seat switches. Seat switches include, for example, […]. Figure 2In the sensor 3 shown, for example, when the seat switch is on, it detects the operator sitting down, and when the seat switch is off, it detects the operator leaving the seat. In the work vehicle 1, such a seat switch can also be used with the following structure. Alternatively, the following structure can be adopted: after selecting "no confirmation request processing" in the confirmation / discretion selection area (speed confirmation selection area R12), if the operator's (user's) state changes from sitting down to leaving the seat, the setting is switched to "confirmation request processing required." With this structure, the following situation can be prevented: if an operator who previously did not require confirmation request processing (disabling the speed confirmation function) becomes another operator, and then attempts to perform speed confirmation while driving, but fails to perform speed confirmation, causing the work vehicle 1 to unexpectedly speed up.

[0127] <3. Precautions, etc.>

[0128] The various technical features disclosed in this specification can be modified in various ways without departing from the spirit of the invention. Furthermore, the various embodiments, examples, and variations shown in this specification can be combined and implemented to the extent possible.

[0129] <4. Postscript>

[0130] The following notes further disclose the embodiments, examples, and variations shown above.

[0131] An exemplary work vehicle of the present invention is a work vehicle equipped with a display device, which may have the following structure (first structure): the display device is configured to display a setting confirmation screen, which displays a maximum vehicle speed display area for displaying the setting value of the maximum vehicle speed and a maximum engine rotation speed display area for displaying the setting value of the maximum engine rotation speed, 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 capable of changing the setting value of the maximum vehicle speed; and a maximum engine rotation speed operation area, displayed side by side with the maximum engine rotation speed display area, and capable of changing the setting value of the maximum engine rotation speed.

[0132] The operating vehicle of the first structure mentioned above can be the following structure (second structure), that is, it is configured to have multiple driving modes that are different from each other in the combination of the set value of the maximum vehicle speed and the set value of the maximum engine rotation speed. In the setting confirmation screen, for each of the multiple driving modes, the maximum vehicle speed display area, the maximum engine rotation speed display area, the maximum vehicle speed operation area, and the maximum engine rotation speed operation area are displayed.

[0133] The work vehicle of the first or second structure mentioned above can be the following structure (third structure), that is, the setting confirmation screen is set to be displayed through the screen switching operation of the display device mentioned above.

[0134] The work vehicle of any of the first to third structures mentioned above can be the following structure (fourth structure), that is, it also has an operating component, which causes the above setting confirmation screen to be displayed.

[0135] The above-mentioned fourth structure of the work vehicle can be the following structure (fifth structure), that is, the above-mentioned operating components are arranged on the side of the driver's seat.

[0136] The work vehicle of the fourth or fifth structure mentioned above can be the following structure (sixth structure), that is, it is configured to be able to use the above operating components to change the setting value of the maximum vehicle speed and the setting value of the maximum engine rotation speed.

[0137] The work vehicle of any of the above-mentioned fourth to sixth structures can be the following structure (seventh structure), that is, after the above-mentioned setting confirmation screen is displayed, if no operation is performed on any of the above-mentioned operating components and the above-mentioned display device for a specified period of time, the above-mentioned display device displays the screen that was displayed before the above-mentioned setting confirmation screen was displayed.

[0138] The operating vehicle of any of the above-mentioned first to seventh structures can be the following structure (eighth structure), that is, the above-mentioned maximum vehicle speed operation area and the above-mentioned maximum engine rotation speed operation area display icons indicating the change method of the set value.

[0139] The above-mentioned second structure of the work vehicle can be the following structure (ninth structure), that is, the above-mentioned multiple driving modes are composed of the first driving mode and the second driving mode. In the above-mentioned setting confirmation screen, an area for selecting whether automatic switching is required is displayed. In this area for selecting whether automatic switching is required, it is possible to select whether the automatic switching domain between the above-mentioned first driving mode and the above-mentioned second driving mode is required.

[0140] The work vehicle of the ninth structure mentioned above can be the following structure (tenth structure), that is, when the above automatic switching is selected, a confirmation selection area is displayed on the above setting confirmation screen. The confirmation selection area can select whether to process the user's confirmation request before the above automatic switching based on the relationship between the above maximum speed setting value between the above first driving mode and the above second driving mode.

[0141] The aforementioned tenth structure of the work vehicle can be the following structure (eleventh structure), that is, it is equipped with a sensor to detect whether the user is seated or not relative to the driver's seat. After selecting that no confirmation request processing is required through the above confirmation need-or-not selection area, if the user's state is detected to change from seated to not seated, the setting is switched to require the above confirmation request processing.

Claims

1. A work vehicle equipped with a display device, characterized in that, The display device is configured to display a setting confirmation screen, which displays 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 setting confirmation screen includes: The maximum vehicle speed operation area is displayed side-by-side with the maximum vehicle speed display area, and the setting value of the maximum vehicle speed can be changed; and The maximum engine rotation speed operation area is displayed side by side with the maximum engine rotation speed display area, and the setting value of the maximum engine rotation speed can be changed.

2. The working vehicle according to claim 1, characterized in that, The work vehicle is configured with multiple driving modes, each with a different combination of the setpoint for the maximum vehicle speed and the setpoint for the maximum engine rotation speed. In the setting confirmation screen, for each of the plurality of driving modes, 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 are displayed.

3. The operating vehicle according to claim 1, characterized in that, The setting confirmation screen is configured to be displayed via screen switching operations on the display device.

4. The working vehicle according to claim 1, characterized in that, It also has an operating component that displays the setting confirmation screen.

5. The working vehicle according to claim 4, characterized in that, The operating components are located on the side of the driver's seat.

6. The operating vehicle according to claim 5, characterized in that, The work vehicle is configured to use the operating components to change the set values ​​of the maximum vehicle speed and the maximum engine rotation speed.

7. The working vehicle according to claim 4, characterized in that, If, after the setting confirmation screen is displayed, neither the operating component nor the display device is operated for a specified period of time, the display device displays the screen that was displayed before the setting confirmation screen was displayed.

8. The operating vehicle according to any one of claims 1 to 7, characterized in that, The maximum vehicle speed operation area and the maximum engine rotation speed operation area display icons indicating how the set values ​​are changed.

9. The operating vehicle according to claim 2, characterized in that, The multiple driving modes consist of a first driving mode and a second driving mode. The setting confirmation screen displays an area for selecting whether automatic switching is needed. In this area, users can choose whether automatic switching between the first driving mode and the second driving mode is required.

10. The operating vehicle according to claim 9, characterized in that, When the automatic switching is selected, a confirmation option area is displayed on the setting confirmation screen. This confirmation option area can select whether to process the user's confirmation request before the automatic switching based on the relationship between the maximum vehicle speed settings of the first driving mode and the second driving mode.

11. The working vehicle according to claim 10, characterized in that, It is equipped with sensors that detect whether the user is seated or not relative to the driver's seat. After selecting "no confirmation request processing" in the confirmation request selection area, if the user's status changes from "seated" to "away", the setting is switched to "confirmation request processing is required".

Images