JP6224540B2 - Work vehicle - Google Patents

Description

  The present invention relates to a working vehicle such as a tractor or a rice transplanter provided with a display device that can be visually recognized by a driver.

  A working vehicle such as a tractor has been proposed in which a tachometer indicating an engine speed and a meter panel having various display lamps are provided with a liquid crystal display (see Patent Document 1 below).

  Specifically, in the working vehicle described in Patent Document 1, the liquid crystal display includes a main shift speed display area for displaying the shift speed of the main transmission, a sub shift speed display area for displaying the shift speed of the sub transmission, It has a forward / reverse display area for displaying the operating state of the forward / reverse switching device and a height display area for displaying the vertical swing angle of the attached work implement, and in addition to these, an information display area is further provided Yes.

  The information display area, in response to an operation on the display changeover switch, sequentially displays the total operating time display state of the engine, the operating time display state after reset, the instantaneous fuel consumption display state, the average fuel consumption display state, and the fuel usage amount display state, It is configured to be switched.

  The configuration described in Patent Document 1 can notify a driver of various types of information without causing an increase in the size of the liquid crystal display by switching and displaying a plurality of pieces of information in the information display area.

However, in the configuration described in Patent Document 1, information displayed in the information display area is determined in advance as the above-described five pieces of information.
On the other hand, information that the operator wants to know varies in various ways according to the driving situation and the working situation.
In this regard, the configuration described in Patent Document 1 has room for improvement.

  In addition, although the above-mentioned five pieces of information are displayed in the information display area, these are not displayed at the same time (in a parallel state), but are displayed alternatively. There was also room for improvement in terms of

JP 2010-172267 A

The present invention has been made in view of such a conventional technique, and efficiently informs the information that the driver wants to know according to the traveling state and the working state, so that the driver can travel in any of a plurality of traveling modes. An object of the present invention is to provide a working vehicle that can easily determine whether a mode should be selected .

In order to achieve the above object, the present invention provides an engine, a continuously variable transmission, an engine speed changing operation member, a speed change operating member, and an engine speed upper limit for setting an upper limit value of the engine output speed. A setting member, a maximum speed setting member for setting an upper limit value of the output rotation speed of the continuously variable transmission as a maximum vehicle speed value, a travel mode switching operation member, a display device, and a display item selection operation member that can be operated manually. And a control device for controlling the operation of the display device, wherein the control device is set by the engine speed upper limit value set by the engine speed upper limit setting member and the maximum speed setting member. A plurality of driving modes defined by the combination of the maximum vehicle speed values, and selected by the driving mode switching operation member among the plurality of driving modes. Start line mode, and is stored as display items one or more information items arbitrarily selected by the display item selection operation member from a plurality of information items relating to the operating state or the setting state of the working vehicle, An information item stored as a display item and an information value of the information item are simultaneously displayed on the display device. The plurality of information items include an engine load factor and an engine in each of the plurality of travel modes. And a driving mode information including an indication of a driving mode being activated among the plurality of driving modes, and the control device includes the engine load factor and the driving mode information. When one of the items is selected as a display item, a working vehicle is automatically provided to include the other in the display item .

Preferably, each time the selection operation by the display item selection operation member is performed, the control device is configured to update and store one or a plurality of information items selected by the latest selection operation as a display item.
In this case, the control device can store the selected information item or items in the EEPROM in a state that is not lost even when the power is turned off, and is rewritable.

In one form, the work vehicle is provided with a display mode selection operation member that can be manually operated.
In this case, the control device changes the screen of the display device from an home screen to an information item selection screen in which the plurality of information items are listed and displayed in response to an operation for shifting to the information display mode by the display mode selection operation member. The information item selected by the display item selection operation member from among the plurality of information items listed and displayed on the information item selection screen is stored as a display item.

  In the various configurations described above, the work vehicle is provided with a sub-display acting as the display device on the side of the driver seat, in addition to the meter panel disposed in front of the driver seat on which the operator is seated. .

The plurality of information items may include a rotational speed of an engine provided in the work vehicle and a rotational speed of a PTO shaft that outputs rotational power from the engine toward a work machine provided in the work vehicle. .
In this case, preferably, when one of the engine speed and the PTO speed is selected as a display item, the control device automatically includes the other in the display item.

According to the work vehicle according to the present invention, the control device includes a plurality of information items relating to the operation state or the setting state of the work vehicle.
The engine load factor, the engine speed upper limit value and the maximum vehicle speed value in each of the plurality of travel modes, and travel mode information including a display of the active travel mode among the plurality of travel modes are included. stored as a column one or more information items operator has selected arbitrarily by the display item selection operation member from a plurality of information items, information items stored as a column and the information values of the information items at the same time Since it is configured to display on the display device, it is possible to efficiently inform the information necessary for the operator, which changes depending on the traveling state and the working state.

Further, the controller is configured to automatically include the other in the display item when one of the engine load factor and the travel mode information is selected as the display item. While recognizing the rate, the engine speed upper limit value and the maximum vehicle speed value in each of the plurality of driving modes and the selected driving mode can be confirmed, and which driving mode of the plurality of driving modes should be selected (that is, currently selected) It is possible to easily determine whether or not the middle driving mode is appropriate and which driving mode is most appropriate when it is inappropriate.

FIG. 1 is a perspective view of a working vehicle according to an embodiment of the present invention. FIG. 2 is a rear view of the working vehicle. FIG. 3 is a plan view of the working vehicle. FIG. 4 is a schematic diagram of transmission of the working vehicle. FIG. 5 is a control block diagram of the working vehicle. FIG. 6 is a schematic view of a meter panel in the working vehicle. 7 is a schematic diagram showing the display state of the display switching area of the liquid crystal display unit in the meter panel shown in FIG. 6, and FIGS. 7A to 7D show the hour meter display state and the vehicle speed display state, respectively. The engine load display state and the PTO rotation speed display state are shown. FIG. 8 is a schematic diagram of an example of an information display screen on the sub-display in the work vehicle.

Hereinafter, preferred embodiments of a working vehicle according to the present invention will be described with reference to the accompanying drawings.
1 to 4 show a perspective view, a rear view, a plan view, and a transmission schematic diagram of the working vehicle 1 according to the present embodiment, respectively.

As shown in FIGS. 1-4, the said working vehicle 1 which concerns on this Embodiment has comprised the form of the tractor.
Specifically, as shown in FIGS. 1 to 4, the working vehicle 1 includes a vehicle frame 10, a driver seat 15 supported by the vehicle frame 10, an engine 50 supported by the vehicle frame 10, and left and right A pair of front wheels 20F, a pair of left and right rear wheels 20R, a traveling system transmission structure 60 that transmits rotational power from the engine 50 to driving wheels, a PTO shaft 95 that outputs rotational power to the outside, and the engine 50, a PTO transmission structure 80 for transmitting rotational power from the PTO shaft 95, a control device 100, and a fuel injection device 40 (see FIG. 5 below) for injecting fuel into the engine 50.

FIG. 5 shows a block diagram of the control device 100.
As shown in FIG. 5, in the present embodiment, the control device 100 has a plurality of controllers such as a main unit controller 101, an engine controller 102, and a meter controller 103.

  The plurality of controllers 101, 102, 103 are electrically connected to the corresponding sensors and actuators, respectively, and the plurality of controllers 101, 102, 103 are electrically connected to each other via a CAN communication bus 105. It is connected to the.

  Each of the controllers 101, 102, and 103 stores a calculation unit (hereinafter referred to as a CPU) including a control calculation unit that executes calculation processing based on signals input from the various sensors and the like, a control program, control data, and the like. ROM, an EEPROM in which setting values are stored without being lost even when the power is turned off, and an EEPROM in which the setting values can be rewritten, a RAM that temporarily holds data generated during calculation by the calculation unit, etc. Including a storage unit.

  As the output control of the engine 50, the control device 100 operates the engine speed change actuator so that the output speed of the engine 50 becomes a set speed by the engine speed change operation member 110 that is manually operated. It is configured to execute normal control.

  Specifically, as shown in FIG. 3 and FIG. 5, the working vehicle 1 sets the operation positions of the engine speed changing operation member 110 such as the accelerator pedal 111 and the accelerator lever 112 and the engine speed changing operation member 110. An operation side engine speed sensor 110a for detecting, a fuel injection device 40 acting as the engine speed change actuator, and an operation side engine speed sensor 50a for detecting the output speed of the engine 50 are provided.

As shown in FIG. 5, in the present embodiment, the fuel injection device 40 includes a fuel supply pump 42 that sucks fuel from a fuel tank 41 through a filter (not shown), and a pressure feed from the fuel supply pump 42. And a plurality of injectors 46 that inject the accumulated fuel in the common rail 45 into each cylinder of the engine 50.
In addition, the code | symbol 45a in FIG. 5 is a pressure sensor which detects the internal pressure of the said common rail 45. FIG.

  In the normal control, the control device 100 operates the injector 46 by using the set rotational speed detected by the operation side engine rotational speed sensor 110a as the target rotational speed of the engine output rotational speed.

  Specifically, in the control device 100, control data indicating the relationship between the engine speed and the injector control amount (fuel injection amount) is stored in advance in a storage unit such as a ROM. Controls the operation of the injector 46 using the control data.

  That is, the control device 100 inputs the operation position of the engine speed changing operation member 110 such as an accelerator lever from the accelerator sensor 110a, recognizes the target engine speed, and is calculated using the control data. The injector 46 is operated so as to inject a fuel injection amount corresponding to the rotational speed, and it is determined whether or not the actual engine rotational speed detected by the engine rotational speed sensor 50a matches the target engine rotational speed. The operation of the injector 46 is controlled so that they match.

  The working vehicle 1 according to the present embodiment is configured to be able to arbitrarily set the rotation speed upper limit value of the engine 50.

Specifically, as shown in FIG. 5, the working vehicle 1 is provided with an engine speed upper limit setting member 310.
The control device 100 is configured so that the target engine speed when the engine speed changing operation member 110 is operated to the maximum is limited to the engine speed upper limit value set by the engine speed upper limit setting member 310. The operation of the fuel injection device 40 is controlled so that the output rotational speed of the engine 50 becomes a rotational speed corresponding to the operating position of the engine rotational speed changing operation member 110.
Note that reference numeral 310 a in FIG. 5 is a sensor that detects the operation position of the engine speed upper limit setting member 310.

  As described above, by providing the engine speed upper limit setting function, working machines such as a tillage device and a planting device in which rotational power is operatively transmitted from the engine 50 due to an erroneous operation on the engine speed changing operation member 110. It is possible to effectively prevent troubles caused by the input of unintended high rotational speed power.

  As shown in FIG. 4, in the present embodiment, the traveling system transmission structure 60 has a hydraulic continuously variable transmission (HST) 61 that acts as a main transmission.

As shown in FIG. 4, the HST 61 is configured to continuously change the rotational power from the engine 50 input via the main clutch 51.
Note that reference numerals 52 and 53 in FIG. 5 denote a charge pump and an auxiliary pump that are driven by rotational power from the engine 50 that is input via the main clutch 51.

  In the present embodiment, the HST 61 is configured to perform a speed change operation via a main speed change actuator 220 that is operation-controlled by the control device 100.

  Specifically, as shown in FIG. 5, in the working vehicle 1, the output rotation speed of the HST 61 detected by the operating-side shift sensor (speed sensor) 61 a is determined by the human transmission operation member 120 such as the main shift lever. The control device 100 controls the operation of the main transmission actuator 220 so that the speed according to the operation is achieved.

  Note that reference numeral 120a in FIG. 5 denotes an operation side shift sensor that detects an operation position (operation direction and / or operation amount) of the main transmission operation member 120.

  In addition, the working vehicle 1 according to the present embodiment is configured such that the upper limit value (maximum speed value) of the output rotation speed of the HST 61 when the main speed change operation member 120 is operated to the maximum can be arbitrarily set. ing.

Specifically, as shown in FIG. 5, the working vehicle 1 is provided with a maximum speed setting member 315.
The control device 100 is configured so that the maximum output rotation speed of the HST 61 when the main transmission operation member 120 is operated to the maximum is limited to the rotation speed set by the maximum speed setting member 315. The operation of the main transmission actuator 220 is controlled so that the output rotation speed of the HST 61 is changed according to the operation position of 120.
In addition, the code | symbol 315a in FIG. 5 is a sensor which detects the operation position of the said highest speed setting member 315. FIG.

  The maximum speed setting member 315 may be separated from the engine speed upper limit setting member 310, or both members 310 and 315 may be configured by a common operation member.

  In other words, when the maximum speed setting member 315 and the engine speed upper limit setting member 310 are configured by a common member, the engine speed and the engine speed upper limit setting member 310 and the engine speed upper limit setting member 315 function as both A vehicle speed changeover switch (not shown) and an engine rotation / vehicle speed setting dial (not shown) are provided.

  The engine rotation / vehicle speed switch is a member for switching between an engine speed upper limit setting phase and a maximum speed setting phase.

  Specifically, the engine rotation / vehicle speed changeover switch can be switched between the engine side and the vehicle speed side, and the control device 100 allows the operator to rotate the engine according to the operation position of the engine rotation / vehicle speed changeover switch. It recognizes whether it wants to register the number upper limit value or the fastest value.

  Then, the control device 100 sets the value set by the engine rotation / vehicle speed setting dial on the side selected by the engine rotation / vehicle speed changeover switch (that is, the engine output rotation speed or the HST output rotation speed). Register as the upper limit.

  In the present embodiment, the control device 100 is defined by a combination of the engine speed upper limit value set by the engine speed upper limit setting member 310 and the maximum speed value set by the maximum speed setting member 315. A plurality of travel modes are stored, and any one of the plurality of travel modes can be activated in response to a command from an artificial operation.

That is, as shown in FIG. 5, the working vehicle 1 is provided with a travel mode switching operation member 320 that can be manually operated.
The travel mode switching operation member 320 is configured to be able to switch between the plurality of travel modes (for example, two types of travel modes, A mode and B mode).

  That is, the travel mode switching operation member 320 can selectively take a travel mode position (for example, an A mode position or a B mode position) corresponding to each of the plurality of travel modes in accordance with an artificial operation. Yes.

The controller 100 controls the engine speed upper limit setting member 310 and the maximum speed in a state where the travel mode switching operation member 320 is located at one travel mode position (A mode position or B mode position in the example). When the high speed setting member 315 is operated, the values set by the operation are stored as the engine speed upper limit value and the maximum speed value in the one traveling mode.
The operation position of the travel mode switching operation member 320 is detected by a sensor 320a (see FIG. 5).

  Thus, in the state where a plurality of travel modes are stored, the control device 100 activates the travel mode corresponding to the operation position of the travel mode switching operation member 320.

  The travel mode switching operation member 320 is configured to be able to take a travel mode release position in addition to the plurality of travel mode positions, and when the travel mode switching operation member 320 is positioned at the travel mode release position. The control device 100 may be configured to reveal the release states of the plurality of travel modes.

As shown in FIG. 4, in the present embodiment, the traveling system transmission structure 60 has a forward / reverse switching device 62.
The forward / reverse switching device 62 is configured to switch and output the rotational direction of the rotational power operatively transmitted from the HST 61.

  Specifically, the forward / reverse switching device 62 is in a forward state in which the rotational power from the HST 61 is output to the drive wheel as rotational power in the normal rotation direction (forward direction), and the rotational power from the HST 61 is in the reverse direction ( The vehicle is configured to be able to selectively take a reverse state in which the rotational power in the reverse direction) is output toward the drive wheel and a neutral state in which power transmission from the HST 61 to the drive wheel is interrupted.

  The forward / reverse switching device 62 takes a forward state or a reverse state in accordance with an artificial operation to the forward / reverse switching operation member 130 such as an F / R lever that can be manually operated. A neutral state (power cutoff state) is taken in response to the clutch disengagement operation.

  In the present embodiment, the forward / reverse switching device 62 is configured to switch the output state by the forward / reverse switching actuator 230.

  Specifically, as shown in FIG. 5, in the working vehicle 1, the output state of the forward / reverse switching device 62 is changed according to the manual operation to the forward / reverse switching operation member 130 and the main clutch operation member 135. As described above, the control device 100 controls the operation of the forward / reverse switching actuator 230.

  Reference numerals 130a and 135a in FIG. 5 are an operation side forward / reverse sensor and an operation side main clutch sensor for detecting the operation positions of the forward / reverse switching operation member 130 and the main clutch operation member 135, respectively. This is a forward / reverse sensor that detects the operating state of the forward / reverse switching device 62.

  As shown in FIG. 4, in the present embodiment, the traveling system transmission structure 60 has a gear-type multi-stage transmission 63 that acts as an auxiliary transmission.

  The gear type multi-stage transmission 63 is disposed on the downstream side in the transmission direction of the forward / reverse switching device 62, and multi-speeds the rotational power input via the forward / reverse switching device 62 to change the traveling system. This is transmitted to the output shaft 65.

The multi-stage transmission 63 is configured to engage the shift stage selected by the sub-shift operation member 140 (see FIG. 5).
As shown in FIG. 4, in the present embodiment, the multi-stage transmission 63 has two speed stages, a high speed stage and a low speed stage.

  In the present embodiment, the multi-stage transmission device 63 is configured such that the shift state is switched by the auxiliary transmission actuator 240 (see FIG. 5).

  Specifically, as shown in FIG. 5, in the working vehicle 1, the control device 100 is configured so that the gear position of the multi-stage transmission device 63 is changed according to the manual operation to the auxiliary transmission operation member 140. Operation control of the auxiliary transmission actuator 240 is performed.

  In FIG. 5, reference numeral 140 a is an operation side auxiliary transmission sensor that detects the operation position of the auxiliary transmission operation member 140, and reference numeral 63 a is an auxiliary transmission sensor that detects the shift state of the multi-stage transmission 63.

  In the present embodiment, the pair of rear wheels 20R is a main drive wheel, and the pair of front wheels 20F is a steering wheel and a sub drive wheel.

  That is, as shown in FIGS. 4 and 5, the working vehicle 1 includes a turning operation member 115 such as a steering wheel that is manually operated, and an operation side turning sensor 115 a that detects an operation position of the turning operation member 115. A turning actuator 215 such as a power steering device for steering the steered wheels (the front wheel 20F in the present embodiment) and an operation side turning sensor 90a for detecting a vehicle turning angle are provided.

  Then, the control device 100 controls the turning actuator 215 so that the vehicle turning angle detected by the operation side turning sensor 90a becomes the operation angle of the turning operation member 115 detected by the operation side turning sensor 115a. Perform operation control.

  In the present embodiment, as shown in FIG. 4, the traveling system transmission structure 60 is further different from the pair of rear wheels 20 </ b> R that act as the main drive wheels by the rotational power of the traveling system output shaft 65. The main drive wheel side differential gear device 66 that transmits the motion, the sub drive wheel drive device 70 that inputs the rotational power of the traveling system output shaft 65, and the rotational power from the sub drive wheel drive device 70 acts as a sub drive wheel. And a pair of left and right brake devices 75L and 75R capable of applying a braking force to the pair of left and right main drive wheels, respectively. . In FIG. 4, only the left brake device 75L is shown.

  In the sub drive wheel drive device 70, the sub drive wheel (the front wheel 20F in the present embodiment) is changed to the main drive wheel (the present embodiment) in response to an artificial operation to the sub drive wheel drive switching operation member 145. , The rear wheel 20R), a four-speed constant speed state in which the rotational power of the traveling system output shaft 65 is output toward the sub drive wheels so as to be always driven at a constant speed, and a turning angle sensor 90a (FIG. 5). The sub drive wheel is driven at the same speed as the main drive wheel when the turning angle detected by the reference) is equal to or less than a predetermined angle, and when the turning angle exceeds the predetermined angle, the sub drive wheel is A four-turn turning speed increasing state in which the rotational power of the traveling system output shaft 65 is output to the sub drive wheels so as to be driven at a higher speed (for example, approximately double speed) than the main drive wheels, and the sub drive wheels Selects 2WD state that does not drive And it is configured so as to obtain taken.

  In the present embodiment, the sub drive wheel drive device 70 is switched in the transmission state via the sub drive wheel drive switching actuator 245.

  Specifically, as shown in FIG. 5, in the work vehicle 1, the control device is configured so that the sub drive wheel drive device 70 is in a transmission state corresponding to the manual operation to the sub drive wheel drive switching operation member 145. 100 controls the operation of the sub drive wheel drive switching actuator 245.

  In FIG. 5, reference numeral 145a is a sub drive wheel drive switching sensor for detecting the operation position of the sub drive wheel drive switching operation member 145, and reference numeral 70a is a transmission state of the sub drive wheel drive device 70. It is a sub drive wheel sensor.

  The pair of brake devices 75L and 75R can individually take a brake operation state and a brake release state in accordance with a manual operation to the pair of brake operation members 150L and 150R that are manually operated.

  In the present embodiment, the pair of brake devices 75L and 75R are switched between a brake operation state and a brake release state via a pair of brake actuators 250L and 250R, respectively.

  Specifically, the control device 100 sets the pair of brake devices 75L and 75R so that the pair of brake devices 75L and 75R are in a brake operation state or a brake release state according to an artificial operation on the pair of brake operation members 150L and 150R. Actuation control of the actuators 250L and 250R is performed.

  In FIG. 5, reference numerals 150La and 150Ra are sensors for detecting the operation state of the pair of brake operation members 150L and 150R, and reference numerals 75La and 75Ra are sensors for detecting the operation state of the pair of brake devices 75L and 75R. It is.

Next, the PTO transmission structure 80 will be described.
As shown in FIG. 4, in the present embodiment, the PTO transmission structure 80 includes a PTO clutch device 81 and a PTO transmission device 82.

The PTO clutch device 81 is configured to selectively transmit or cut off rotational power from the engine 50 input via the main clutch 51.
The PTO transmission 82 is configured to change the rotational power from the engine 50 input via the PTO clutch mechanism 81 and output it to the PTO shaft 95.

  That is, as shown in FIG. 5, the control device 100 performs a PTO clutch so that the PTO clutch device 81 is in a transmission state and a shut-off state in response to a manual operation to a PTO on / off operation member 160 that is manually operated. Actuation control of the actuator 260 is performed.

  Further, as shown in FIG. 5, the control device 100 controls the operation of the PTO speed change actuator 265 so that the PTO speed change device 82 performs a speed change operation in response to a manual operation on the PTO speed change operation member 165 that is manually operated. Is supposed to do.

In FIG. 5, reference numeral 160 a is a sensor that detects the operation position of the PTO on / off operation member 160, and reference numeral 81 a is a sensor that detects the operating state of the PTO clutch device 81.
Reference numeral 165a is a sensor that detects the operation position of the PTO speed change operation member 165, and reference numeral 82a is a sensor that detects the operating state of the PTO speed change device 82.
Reference numeral 95a denotes a sensor for detecting the rotational speed of the PTO shaft 95.

  The working vehicle 1 according to the present embodiment can be provided with a working machine 200 (see FIG. 4) such as a rotary tiller in a state where the rotational power from the engine 50 can be transmitted via the PTO shaft 95. It is configured as follows.

  The working vehicle 1 can move the attached working machine 200 up and down, and can tilt in the left-right direction.

  Specifically, the working vehicle 1 can be connected to a working machine 200 such as a tillage device via a link mechanism 210 (see FIG. 3). As shown in FIG. A lifting actuator 270 that lifts and lowers the working machine 200 connected via a link mechanism 210 and a tilting actuator 280 that changes the horizontal tilt of the working machine 200 are provided.

  The control device 100 performs operation control of the elevating actuator 270 and the tilting actuator 280 based on an artificial operation signal.

  Specifically, the working vehicle 1 includes a manual lifting operation member 171, a one-touch lifting operation member 172, and a lift position setting member 173 as the lifting operation member 170.

When the manual elevating operation member 171 is operated, the control device 100 operates the elevating actuator 270 so that the work machine 200 is positioned at a height corresponding to the operation position of the manual elevating operation member 171.
Note that reference numeral 171a in FIG. 5 is a sensor that detects the operation position of the manual elevating operation member 171, and reference numeral 201a is a sensor that detects the elevating position of the work implement 200.

  When the one-touch lifting operation member 172 is lifted, the control device 100 operates the lifting actuator 270 so that the work machine 200 is lifted to a height set by the lifting position setting member 173.

  Note that reference numeral 172a in FIG. 5 is a sensor that detects an operation state of the one-touch lifting operation member 172, and reference numeral 173a is a sensor that detects a setting position by the ascending position setting member 173.

When the one-touch lifting / lowering operation member 172 is lowered, the control device 100 operates the lifting / lowering actuator 270 so that the work machine 200 is lowered to the lowered position defined by the operation position of the manual lifting / lowering operation member 171. Let
That is, in the present embodiment, the manual elevating operation member 171 also functions as a lowered position setting member.

As shown in FIG. 5, the working vehicle 1 is provided with a tilting operation member 180, and the working machine 200 is tilted in the left-right direction in response to an artificial operation on the tilting operation member 180. The control device 100 controls the operation of the tilt actuator 280.
In FIG. 5, reference numeral 180 a is a sensor that detects the operation position of the tilt operation member 180, and reference numeral 202 a is an inclination sensor that detects the inclination of the working machine 200.

Here, information display control in the working vehicle 1 according to the present embodiment will be described.
As shown in FIGS. 3 and 5, the working vehicle 1 according to the present embodiment is disposed in front of the driver seat 15 as a member that displays various information so that the operator can visually recognize the information. A meter panel 400 and a sub-display 450 disposed on the side of the driver's seat are provided.

FIG. 6 shows a schematic diagram of the meter panel 400.
As shown in FIG. 6, the meter panel 400 includes a tachometer 405 that displays the rotational speed of the engine 50, a plurality of display lamps 410 that display whether or not various control modes included in the work vehicle 1 are activated, And a liquid crystal display unit 420.

  As shown in FIG. 6, the liquid crystal display unit 420 includes a neutral display area 421 that indicates whether or not the forward / reverse switching device 62 is in a neutral state, and a remaining fuel display area that displays the remaining amount of the fuel tank 41. 422, a water temperature display area 423 for displaying the temperature of the engine cooling water, and a display switching area 425 for sequentially switching and displaying a plurality of pieces of information in accordance with an artificial operation by the operator.

Specifically, as shown in FIG. 5, the work vehicle 1 is provided with a display switching operation member 430.
In response to an operation on the display switching operation member 430, the control device 100 displays the display state of the display switching area 425, the total operating time of the engine 50, and the operating time after resetting of the engine 50. Display state (see FIG. 7 (a)), traveling vehicle speed, selected traveling mode, and engine speed upper limit value and maximum speed value set by the traveling mode (see FIG. 7 (b)). ), And an engine load display state (see FIG. 7C) that displays the traveling vehicle speed, the selected traveling mode, and the engine load factor.

  When the PTO on / off operation member 160 is turned on, the control device 100 displays the traveling vehicle speed, the selected traveling mode, and the PTO rotation speed as the display state of the display switching area. The rotation speed display state (see FIG. 7D) is added.

The operating time of the engine 50 is measured based on the output of a timer provided in the control device 100.
Specifically, the control device 100 detects the operation and stop of the engine 50 based on a signal from the engine speed sensor 50a, and sets the time during which the engine speed exceeds a predetermined speed as the output of the timer. Based on the total engine operating time.

  Further, when the control device 100 inputs a reset signal in response to a manual operation to a reset member 435 (see FIG. 5) provided in the work vehicle 1, the engine speed is set to a predetermined speed after the reset signal is input. Is accumulated as the operation time after reset based on the timer output.

The engine load factor is calculated using, for example, relational data between the fuel injection amount and the engine speed that is provided in the control device 100 in advance.
That is, the control device 100 obtains the maximum fuel injection amount and the no-load fuel injection amount at the engine speed from the measured engine speed and the relational data input from the engine speed sensor 50a.

  Then, the control device 100 calculates the ratio of the deviation between the actual fuel injection amount and the no-load fuel injection amount to the deviation between the maximum fuel injection amount and the no-load fuel injection amount as the engine load factor.

  Next, information display by the sub display 450 will be described.

  The control device 100 displays one or a plurality of information items arbitrarily selected by the operator among a plurality of information items related to the operation state or the setting state in the work vehicle 1 and the information value of the information item on the sub display 450. It is configured to display simultaneously.

  Specifically, as shown in FIG. 5, the work vehicle 1 is provided with a display item selection operation member 480 that can be manually operated, and the control device 100 selects the display item from the plurality of information items. One or more information items arbitrarily selected by the operation member 480 are stored as display items, and the information items stored as display items and the information values of the information items are simultaneously displayed on the sub display 450.

  The plurality of information items include a traveling speed (vehicle speed), a PTO rotational speed, an engine rotational speed, an engine load factor, an engine rotational speed upper limit value and a maximum vehicle speed value in each of the multiple traveling modes, and a selected traveling mode. Is included.

FIG. 8 shows an example of an information display screen of the sub display 450.
In the example shown in FIG. 8, the information display screen of the sub-display 450 includes first to eighth display areas 450 (1) to 450 (8), and the first to fifth display areas 450 (1 ) To 450 (5), the traveling speed (vehicle speed), the PTO rotational speed, the engine rotational speed, the engine load factor, and a plurality of traveling modes are displayed, respectively.

  Preferably, each time the selection operation by the display item selection operation member 480 is performed, the control device 100 may use one or more information items selected by the latest selection operation as a display item to turn off the power. It can be stored in the EEPROM without being lost and rewritable.

  According to such a configuration, it is possible to efficiently display necessary information that changes according to the usage status of the work vehicle 1 to the operator.

Further, preferably, when one of the engine speed and the PTO speed is selected as a display item, the control device 100 may be configured to automatically include the other in the display item.
That is, the control device 100 can simultaneously display the engine speed and the PTO speed on the sub display 450 as a set.

  According to such a configuration, it is possible to visually recognize the PTO rotational speed in comparison with the engine rotational speed, and thereby it is possible to easily grasp the load state of the working machine 200 driven by the PTO shaft 95. .

Preferably, when one of the engine load factor and the travel mode information is selected as a display item, the control device 100 may be configured to automatically include the other in the display item.
That is, the control device 100 can simultaneously display the engine load factor and the travel mode information on the sub display 450 as a set.

  According to such a configuration, it is possible to check the engine speed upper limit value and the maximum vehicle speed value in each of the plurality of travel modes and the selected travel mode while recognizing the engine load factor. It is possible to easily determine whether a mode should be selected (that is, whether or not the currently selected travel mode is appropriate, and which travel mode is most appropriate when it is inappropriate).

  For example, the work vehicle 1 is provided with a display mode selection operation member 490 (see FIG. 5) that can be manually operated, and the control device 100 performs an operation of shifting to the information display mode by the display mode selection operation member 490. The screen of the sub-display 450 is shifted from the home screen to an information item selection screen in which the plurality of information items are listed and displayed, and the display items are selected from the plurality of information items listed and displayed on the information item selection screen. The information item selected by the selection operation member 480 may be configured to be stored as a display item.

  According to such a configuration, it is possible to improve operability when selecting a display item from the plurality of information items.

  In this case, the display item selection operation member 480 and the display mode selection operation member 490 can be formed by a single rotary switch (not shown) that can be rotated and pushed.

  That is, the control device 100 displays a plurality of icons including the information display mode icon on the home screen of the sub-display 450, and sequentially moves the cursor on the plurality of icons according to the rotation operation of the rotary switch. When the rotary switch is pushed with the icon positioned on the information display mode icon, the information display mode can be entered.

  In the information display mode, the control device 100 displays an information item selection screen on which the plurality of information items are listed and displayed on the sub-display 450 as an initial screen, and responds to the rotation operation of the rotary switch in this state. Thus, the cursor is sequentially moved onto the plurality of information items.

  When the rotary switch is pushed with the cursor positioned on one information item, the one information item is stored as a display item, and the sub-display is operated according to a display item selection operation end command. 450 is shifted from the information item selection screen to the information display screen (see FIG. 8) for simultaneously displaying the information item selected as the display item and the information value of the information item.

  The display item selection end command, for example, displays an icon indicating the end of selection in addition to the plurality of information items on the information item selection screen, and the rotary switch in a state where the cursor is positioned on the icon Can be generated by being pushed.

  Further, a return icon to the information item selection screen and / or a return icon to the home screen is displayed on the information display screen, and the information item is displayed from the information display screen in response to an artificial operation to the rotary switch. It is possible to shift to the selection screen or the home screen.

1 working vehicle 15 driver's seat 50 engine 61 HST (continuously variable transmission)
95 PTO shaft 100 Control device 110 Engine speed change operation member 120 Main speed change operation member 310 Engine speed upper limit setting member 315 Maximum speed setting member 320 Travel mode switching operation member 400 Meter panel 450 Sub-display (display device)
480 Display item selection operation member 490 Display mode selection operation member

Claims (5)

An engine, a continuously variable transmission, an engine speed changing operation member, a speed change operating member, an engine speed upper limit setting member for setting an upper limit value of the output speed of the engine, and the continuously variable transmission as a maximum vehicle speed value. A maximum speed setting member for setting an upper limit value of the output rotation speed of the device, a traveling mode switching operation member, a display device, a display item selection operation member which can be manually operated, and a control device which controls the operation of the display device; A working vehicle with
The control device stores a plurality of driving modes defined by a combination of an engine speed upper limit value set by the engine speed upper limit setting member and a maximum vehicle speed value set by the maximum speed setting member. The travel mode selected by the travel mode switching operation member among the travel modes is activated, and is arbitrarily selected by the display item selection operation member from among a plurality of information items related to the operation state or setting state in the work vehicle One or a plurality of information items that are stored as display items, the information items stored as display items and the information values of the information items are simultaneously displayed on the display device ,
The plurality of information items include a display of an engine load factor, an engine speed upper limit value and a maximum vehicle speed value in each of the plurality of travel modes, and an active travel mode among the plurality of travel modes. Information and
When one of the engine load factor and the travel mode information is selected as a display item, the control device automatically includes the other in the display item .   The control device updates and stores one or a plurality of information items selected by the latest selection operation as a display item each time a selection operation by the display item selection operation member is performed. The listed working vehicle. It has a display mode selection operation member that can be operated manually,
The control device switches the screen of the display device to an information item selection screen in which the plurality of information items are listed and displayed in response to an operation for shifting to the information display mode by the display mode selection operation member. The work vehicle according to claim 1 or 2, wherein an information item selected by the display item selection operation member from among the plurality of information items listed and displayed on a screen is stored as a display item.   4. A sub-display functioning as the display device is provided on a side of the driver seat separately from a meter panel disposed in front of a driver seat on which a driver is seated. A working vehicle according to any one of the above. The plurality of information items include a rotational speed of an engine provided in the working vehicle and a rotational speed of a PTO shaft that outputs rotational power from the engine toward a working machine provided in the working vehicle. And
5. The work vehicle according to claim 1, wherein when one of the engine speed and the PTO speed is selected as a display item, the control device automatically includes the other in the display item. .

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