Work vehicles

Abstract

To provide a work vehicle which can display fuel consumption per unit time for operation conditions for performing work and battery consumption in order to solve such a problem that there is an automobile which converts engine fuel consumption and electric motor battery consumption into energy consumption and displays the same, and the automobile displays the energy consumption for travel distance, however, a work vehicle is required to grasp energy consumption for operation conditions for performing work.SOLUTION: In a work vehicle equipped with a display body 3, in the case of an engine specification such that an engine is mounted on the display body 3 as a prime mover, an engine specification display screen is made, and displays fuel consumption per unit time for each operation condition and displays a work possible time from the fuel consumption per unit time, and in the case of electric motor specification, an electric motor specification display screen is made, and displays battery consumption per unit time for each operation condition and displays a work possible time from the battery consumption per unit time.SELECTED DRAWING: Figure 4

Description

Technical Field

[0001] The present invention relates to work vehicles for agriculture, civil engineering, construction, etc.

Background Art

[0002] There is an automobile that converts the fuel consumption of an engine and the battery consumption of an electric motor into energy consumption and displays it (Patent Document 1).

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0004] An automobile displays the energy consumption with respect to the traveling distance. However, a work vehicle needs to grasp the energy consumption with respect to the operating conditions for performing work.

[0005] In the present invention, in consideration of such problems of conventional work vehicles, an object is to provide a work vehicle capable of displaying the fuel consumption per unit time and the battery consumption per unit time with respect to the operating conditions for performing work.

Means for Solving the Problems

[0006] The first aspect of the present invention relates to a work vehicle equipped with a display unit (3), When the display unit (3) is configured as an engine specification with an engine installed as the prime mover during production, the engine specification display screen is activated by the prime mover specification switch to display the fuel consumption per unit time for each operating condition, and the available working time is displayed from the fuel consumption per unit time. When an electric motor is selected as the prime mover during production, the prime mover specification switch activates the electric motor specification display screen, which shows the battery consumption per unit time for each operating condition, and then displays the remaining working time based on the battery consumption per unit time. Only one of the engine specifications display screen or the electric motor specifications display screen is displayed on the display unit (3). In the case of an electric motor-equipped tractor, it is characterized by having left and right front-wheel drive motors for the left and right front wheels and left and right rear-wheel drive motors for the left and right rear wheels, and the rotation speed of each wheel is displayed on a display unit (3). The second aspect of the present invention is a work vehicle according to the first aspect of the present invention, characterized in that the control device automatically divides the operating state based on the PTO rotation speed and speed setting, calculates and records the fuel consumption per unit time or battery consumption per unit time used for each operating state division, and when an operating state division is selected, the display unit (3) displays the start and end times of the work, the PTO rotation speed and average vehicle speed during this period, the fuel consumption per unit time, and the battery consumption per unit time. The third aspect of the present invention is a work vehicle according to the first or second aspect of the present invention, characterized in that, by selecting the operating state and field, the control device calculates the total amount of fuel or battery required to perform work in the field, and if the current amount of fuel or battery in the work equipment is insufficient, the display unit (3) displays a replenishment instruction before work begins. The fourth aspect of the present invention is a work vehicle according to the first aspect of the present invention, characterized in that when an abnormality occurs in the electric motor, the state of the abnormally operating electric motor is displayed as a rotation abnormality and an interrupt. The fifth aspect of the present invention is a work vehicle according to the fourth aspect of the present invention, characterized in that a liquid crystal monitor selection switch (6) provided on the handle (2) is pressed to enter the liquid crystal monitor selection mode, the right or left switch of the direction and confirmation switch (7) is pressed to change from the basic display screen of the electric motor specification display screen to the display screen of the rotation speed of each wheel, and the confirmation switch is pressed to confirm the display screen. First invention related to the present invention This is a work vehicle equipped with a display unit 3, wherein if the display unit 3 is an engine specification with an engine as the prime mover, it displays an engine specification display screen that shows the fuel consumption per unit time for each operating condition, and displays the available working time from the fuel consumption per unit time. If it is an electric motor specification, it displays an electric motor specification display screen that shows the battery consumption per unit time for each operating condition, and displays the available working time from the battery consumption per unit time.

[0007] First invention related to the present invention According to the documentation, when the display unit 3 is configured as an engine-powered unit, it displays the engine specification screen, showing the fuel consumption per unit time for each operating condition, and then displays the available working time based on the fuel consumption per unit time. When it is configured as an electric motor-powered unit, it displays the electric motor-powered unit, showing the battery consumption per unit time for each operating condition, and then displays the available working time based on the battery consumption per unit time. Thus, the display unit 3 can be used interchangeably for both engine-powered and electric motor-powered units.

[0008] Furthermore, the fuel consumption per unit time, battery consumption per unit time, and available working time can be recognized for each operating condition, thereby improving work efficiency and productivity.

[0009] A second invention related to the present invention The control unit automatically categorizes the operating state based on the PTO rotation speed and speed setting, calculates and records the fuel consumption or battery consumption per unit time used for each operating state category, and when an operating state category is selected, the display unit 3 displays the start and end times of the operation, the PTO rotation speed and average vehicle speed during that period, the fuel consumption per unit time, and the battery consumption per unit time. First invention related to the present invention It is a work vehicle.

[0010] A second invention related to the present invention According to First invention related to the present inventionIn addition to the above-described effects, the control device automatically classifies the operating state based on the PTO rotation speed and the speed setting, calculates and records the fuel consumption per unit time or the battery consumption per unit time used for each classification of the operating state. When a classification of the operating state is selected, the display unit 3 displays the start and end times of the work, the PTO rotation speed and the average vehicle speed during that period, the fuel consumption per unit time, and the battery consumption per unit time. Thus, from the PTO rotation speed and the average vehicle speed, the user can assume the conditions under which the vehicle was used, and by easily understanding the operating state and the fuel or battery consumption per unit time, the work efficiency can be improved.

[0011] A third invention related to the present invention By selecting the operating state and the field, the control device calculates the total fuel amount or the total battery amount required for the work in the field. When the remaining fuel amount or the remaining battery amount in the current work machine is insufficient, the display unit 3 displays a replenishment instruction before the work. First or second invention related to the present invention is a work vehicle.

[0012] A third invention related to the present invention According to First or second invention related to the present invention In addition to the above-described effects, by selecting the operating state and the field, the control device calculates the total fuel amount or the total battery amount required for the work in the field. When the remaining fuel amount or the remaining battery amount in the current work machine is insufficient, the display unit 3 displays a replenishment instruction before the work. Therefore, the fuel consumption or the battery consumption for each field according to the operating state is calculated with high accuracy, and fuel exhaustion or battery exhaustion during the work in the field is appropriately prevented.

[0013] A fourth invention related to the present invention is a work vehicle in which the fuel supply port of the engine specification and the power cord 18 outlet 10b to the battery of the battery specification are provided on the same side of the vehicle body. First invention related to the present invention is a work vehicle.

[0014] Fifth invention related to the present invention is a work vehicle in which the driver's seat 16 is provided offset to either the left or right of the vehicle body, and the fuel supply port and the power cord 18 outlet 10b to the battery are provided on the driver's seat 16 side of the vehicle body. First invention related to the present invention is a work vehicle.

Brief Description of the Drawings

[0015] [Figure 1] It is a plan view of the operation panel of a work vehicle according to an embodiment of the present invention. [Figure 2] It is a plan view of the steering wheel of the work vehicle. [Figure 3] It is a side view for explaining the operation of the liquid crystal monitor of the work vehicle. [Figure 4] (A) and (B) are display screens of the liquid crystal monitor. [Figure 5] (A) and (B) are tabulation sheets recorded in the control device of the work vehicle. [Figure 6] (A) and (B) are display screens of the liquid crystal monitor. [Figure 7] It is a tabulation sheet recorded in the control device of the work vehicle. [Figure 8] It is a plan view of the operation panel of the work vehicle. [Figure 9] It is a display screen of the liquid crystal monitor. [Figure 10] It is a display screen of the liquid crystal monitor. [Figure 11] It is a display screen of the liquid crystal monitor. [Figure 12] It is a side view of a main part of a combine according to an embodiment of the present invention. [Figure 13] It is a side view of a main part of the combine.

Mode for Carrying Out the Invention

[0016] As an embodiment of the present invention, an agricultural tractor, which is a type of work vehicle, will be described.

[0017] The tractor is a four-wheel drive vehicle with front and rear wheels, and has left and right front wheels and left and right rear wheels at the four corners of the vehicle body.

[0018] The front wheel axle case that supports the left and right front wheels is attached to the lower side of the front frame, and the rear wheel axle case that supports the left and right rear wheels is attached to the left and right side surfaces at the rear of the transmission case.

[0019] The engine is mounted under the hood at the top center of the front frame.

[0020] Tractors come in two types: those equipped with a diesel engine (or gasoline engine) as the prime mover, and those equipped with an electric motor.

[0021] In the case of engine-powered tractors, engine peripheral equipment such as an engine control unit, radiator, air cleaner, fuel tank, and urea tank are installed.

[0022] In the case of electric motor-equipped tractors, peripheral equipment for the electric motor includes an electric motor control unit, a battery control unit, and a battery. Note that a VCU (Vehicle Control Unit) can be used instead of the electric motor control unit and battery control unit.

[0023] The control unit is equipped with a control panel 1, a steering wheel 2, and a driver's seat. When the steering wheel 2 is rotated left or right, the steering actuator is activated, causing the left and right front wheels to steer left or right.

[0024] The rear of the vehicle is equipped with a lifting device that rotates up and down using a hydraulic lifting cylinder, and various implements such as rotary tillers are attached to this lifting device.

[0025] The rotational power of the prime mover is input to the transmission case via the main clutch. A forward / reverse clutch is provided at the inlet of the transmission case, which engages and disengages the power transmission and switches between forward and reverse. The power transmitted through the forward / reverse clutch is then split into two systems: the driving force that drives the left and right front wheels and left and right rear wheels, and the PTO driving force, which is externally extracted power.

[0026] The driving force is transmitted to the rear differential in the rear axle case via a drive transmission consisting of a forward / reverse transmission unit, a main transmission unit, and a sub-transmission unit, driving the left and right rear wheels. The rear axle case is also equipped with left and right brake units. Furthermore, the power after being shifted in the drive transmission unit is taken out to the front of the transmission case via a 2WD / 4WD switching device, and then transmitted via the front wheel transmission shaft to the front differential in the front axle case, driving the left and right front wheels.

[0027] Furthermore, the PTO driving force is taken out via the PTO clutch and PTO transmission and delivered to the PTO shaft, which protrudes rearward from the rear of the transmission case. Transmission shafts to various implements such as rotary tillers are detachably connected to the protruding part of the PTO shaft.

[0028] The tractor is equipped with a control device located inside the lower part of the control panel 1, and a GNSS (Global Navigation System).

[0029] The control device automatically steers the vehicle by steering the left and right front wheels using steering actuators, automatically shifts gears using a shift actuator, automatically switches between 2WD and 4WD using a 2WD / 4WD switch actuator, automatically stops the vehicle by operating the main clutch and left and right brakes using the main clutch actuator and brake actuator, raises and lowers the rotary tiller using a lifting device by operating a lifting hydraulic cylinder, automatically controls the drive of various implements such as the rotary tiller by operating the PTO clutch, autonomously drives along the work route while calculating position information using GNSS by receiving signals from positioning satellites, and automatically performs various tasks such as tilling.

[0030] Furthermore, the control device has a map database registered that records the fields A, B, and C where work is being performed, as well as the barn and home. The control device uses the location information calculated by GNSS to recognize which field A, B, or C the tractor is working in, or whether it is moving to the barn or home.

[0031] As shown in Figure 1, the control panel 1 is a typical device that receives signals from sensors on each device and displays the status of each device, vehicle speed, etc., and in addition, it is equipped with a display unit 3 (in this embodiment, it is a liquid crystal monitor, and hereafter referred to as the liquid crystal monitor 3) in the center.

[0032] As shown in Figures 2 and 3, the liquid crystal monitor 3 is rotated up and down and left and right by the electric motor 4.

[0033] The handle 2 is equipped with an LCD monitor angle setting switch 5, an LCD monitor selection switch 6, and a direction and confirmation switch 7.

[0034] Then, pressing the LCD monitor angle setting switch 5 activates the LCD monitor angle change mode, and the electric motor 4 operates by operating the direction and confirmation switch 7, allowing the LCD monitor 3 to rotate up and down and left and right to change its angle.

[0035] For example, each time the right switch of the direction and confirmation switch 7 is pressed, the electric motor 4 operates by a predetermined amount, rotating the LCD monitor 3 to the right by a predetermined amount. When the central confirmation switch is pressed, the LCD monitor angle change mode is canceled and the angle of the LCD monitor 3 is confirmed.

[0036] Additionally, pressing the LCD monitor selection switch 6 activates the LCD monitor selection mode, allowing you to change the display screen using the direction and confirmation switch 7.

[0037] Specifically, by pressing the LCD monitor selection switch 6 to enter LCD monitor selection mode, and then pressing the right or left switch of the direction and confirmation switch 7, the display screen will change sequentially, and the confirmation switch in the center will confirm the displayed screen.

[0038] Figure 4 shows the basic display screens confirmed by the above operation, and includes the engine specification display screen shown in (A) and the electric motor specification display screen shown in (B).

[0039] If a diesel engine (or gasoline engine) is selected as the engine specification during tractor production, a separate engine specification switch will be provided to change the display screen to the engine specification display screen.

[0040] In this case, the default display screen will be the engine specifications display screen shown in (A).

[0041] Furthermore, if an electric motor is installed as the prime mover during the production of the tractor, the display screen will be changed to the electric motor specification display screen using the prime mover specification switch.

[0042] In this case, the basic display screen will be the electric motor specification display screen shown in (B).

[0043] (1) The engine specification display screen shown in (A) and the electric motor specification display screen shown in (B) of the basic display screen will be explained in detail.

[0044] As shown in Figure 4(A), the engine specifications display screen on the basic display screen is calculated by the control unit based on detections from various sensors and displays vehicle speed, PTO rotation speed, urea solution level, fuel level, time, speed setting, engine load rate, fuel consumption per unit time, available operating time, and cumulative operating time.

[0045] In particular, the remaining amount of urea solution is calculated by the control unit based on the detection value of the urea solution level sensor installed in the urea tank, and the remaining amount of urea solution is displayed.

[0046] The remaining fuel level is calculated by the control unit based on the readings from a fuel level sensor installed in the fuel tank, and the remaining fuel level is displayed.

[0047] The speed setting is calculated by the control unit based on the detection of the operating position of the transmission, and displayed as three driving conditions: low speed, medium speed, and high speed.

[0048] The engine load ratio is calculated and displayed by the control unit based on engine operation data from the engine control unit.

[0049] The fuel consumption per unit time is calculated and displayed by the control unit based on engine operation data from the engine control unit and the value detected by the fuel level sensor.

[0050] Furthermore, if the speed setting (driving conditions) is changed from low, medium, or high speed, the display will be reset to show the fuel consumption per unit time for the changed low, medium, or high speed.

[0051] The available operating time is calculated and displayed by the control unit based on the fuel level sensor's readings, according to the fuel consumption per unit time at the set low, medium, or high speed.

[0052] As shown in Figure 4(B), the electric motor specifications display screen on the basic display screen is calculated by the control unit based on detections from various sensors and displays vehicle speed, PTO rotation speed, battery level, auxiliary battery level, time, speed setting, motor load rate, battery consumption per unit time, available operating time, and cumulative operating time.

[0053] In particular, the battery charge level and the auxiliary battery charge level (hereinafter collectively referred to as battery charge level) are calculated and displayed by the control unit based on battery management data from the battery control unit.

[0054] The speed setting is calculated by the control unit based on the detection of the operating position of the transmission, and displayed as three driving conditions: low speed, medium speed, and high speed.

[0055] The motor load ratio is calculated and displayed by the control unit based on electric motor operation data from the electric motor control unit (or VCU).

[0056] The battery consumption per unit time is calculated and displayed by the control unit based on battery management data from the battery control unit.

[0057] Furthermore, if the speed setting (driving conditions) is changed from low, medium, or high speed, the display will reset and show the battery consumption per unit time for each of the changed low, medium, or high speeds.

[0058] The available operating time is calculated and displayed by the control unit based on the remaining battery charge value from the battery control unit, according to the battery consumption per unit time at the set speed (low, medium, or high).

[0059] In short, the LCD monitor 3 can be used for both engine-powered and electric motor-powered tractors during production, by displaying the engine specifications screen when the tractor is built with an engine, and the electric motor specifications screen when it is built with an electric motor.

[0060] Furthermore, in the case of the engine specifications display screen, the fuel consumption per unit time can be displayed, and the available working time can be displayed based on this fuel consumption per unit time.

[0061] In the case of the electric motor specifications display screen, the battery consumption per unit time can be displayed, and the remaining working time can be displayed based on that battery consumption per unit time.

[0062] Furthermore, the fuel consumption per unit time, battery consumption per unit time, and available working time can be recognized for each speed setting (operating condition), thereby improving work efficiency and productivity.

[0063] (2) The system automatically categorizes operating conditions based on PTO rotation speed and speed setting (vehicle speed), calculates and records the fuel consumption or battery consumption per unit time used for each operating condition category, and when an operating condition category is selected, it displays an example of the LCD monitor 3 displaying the start and end times of the work, the PTO rotation speed and average vehicle speed during this period, the fuel consumption per unit time, and the battery consumption per unit time.

[0064] First, let me explain the electric motor specifications display screen.

[0065] In other words, when the vehicle is driven on the road or performing various tasks, the control device records the driving status and the time spent on those tasks, as shown in Figure 5(A).

[0066] The control device then automatically categorizes the operating state, calculates the working time, PTO rotation speed, average vehicle speed, and battery consumption per unit time for each operating state, and records them in a summary as shown in Figure 5(B).

[0067] Press the LCD monitor selection switch 6 to enter LCD monitor selection mode, then press the right or left switch of the direction and confirmation switch 7 to change from the basic display screen of the electric motor specifications display screen to the operating status screen shown in Figure 6(A), and then press the central confirmation switch to confirm the display screen.

[0068] Then, by tapping the column for the driving condition you want to check, the operating time, PTO rotation speed, average vehicle speed, and battery consumption per unit time for that driving condition will be displayed, as shown in Figure 6(B).

[0069] By analyzing PTO rotation speed and average vehicle speed, it's possible to anticipate the operating conditions and easily understand the battery consumption per unit of time, thereby improving work efficiency.

[0070] Next, I will explain the engine specifications display screen.

[0071] In other words, when the vehicle is driven on the road or performing various tasks, the control system records the driving status and the time spent on those tasks.

[0072] The control unit then automatically categorizes the operating state and calculates and records the working time, PTO rotation speed, average vehicle speed, and fuel consumption per unit time for each operating state.

[0073] Press the LCD monitor selection switch 6 to enter LCD monitor selection mode, then press the right or left switch of the direction and confirmation switch 7 to change from the basic display screen of the engine specifications display screen to the driving status screen, and then press the central confirmation switch to confirm the displayed screen.

[0074] Then, by tapping the column for the driving condition you want to check, the operating time, PTO rotation speed, average vehicle speed, and fuel consumption per unit time for that driving condition will be displayed.

[0075] By analyzing PTO rotation speed and average vehicle speed, it's possible to anticipate the operating conditions and easily understand the driving state and fuel consumption per unit time, thereby improving work efficiency.

[0076] (3) By selecting the operating status and field, the total amount of fuel or battery required for field work is calculated, and if the current amount of fuel or battery in the implement is insufficient, an example of the display on the LCD monitor 3 that prompts replenishment before work begins will be explained.

[0077] First, let me explain the electric motor specifications display screen.

[0078] In other words, when driving on roads or performing various tasks, as shown in Figure 7, the control device calculates and records whether work is possible based on the operating status, the field, the required power (battery capacity), and the remaining battery (remaining power).

[0079] Press the LCD monitor selection switch 6 to enter LCD monitor selection mode, then press the right or left switch of the direction and confirmation switch 7 to change from the basic display screen of the electric motor specifications display screen to the operating status and field selection screen shown in Figure 8, and then press the confirmation switch in the center to confirm the display screen.

[0080] Then, by tapping the operating status and field fields you want to check, the replenishment instructions (or "OK" if no replenishment is needed) will be displayed from the recorded information in Figure 7, as shown in Figure 9.

[0081] Because it calculates power consumption (battery consumption) for each field according to the operating conditions, it is highly accurate and effectively prevents the battery from running out during field work.

[0082] Next, I will explain the engine specifications display screen.

[0083] In other words, when the vehicle is driven on roads or performing various tasks, the control system calculates and records the operating status, the field, the required fuel amount, and whether or not the work can be performed based on the remaining fuel amount.

[0084] Press the LCD monitor selection switch 6 to enter LCD monitor selection mode, then press the right or left switch of the direction and confirmation switch 7 to change from the basic display screen of the engine specifications display screen to the operating status and field selection screen, and finally press the confirmation switch in the center to confirm the display screen.

[0085] Then, by tapping the operating status and field fields you want to check, replenishment instructions will be displayed based on the recorded information (or OK if no replenishment is needed).

[0086] Because it calculates fuel consumption for each field according to the operating conditions, it is highly accurate and effectively prevents running out of fuel during field work.

[0087] (4) As shown in Figure 10, in the case of an electric motor-equipped tractor with left and right front wheel drive motors for the left and right front wheels and left and right rear wheel drive motors for the left and right rear wheels, the rotation speed of each wheel is displayed on the LCD monitor 3.

[0088] Specifically, press the LCD monitor selection switch 6 to enter LCD monitor selection mode, press the right or left switch of the direction and confirmation switch 7 to change from the basic display screen of the electric motor specifications display screen to the display screen showing the rotation speed of each wheel as shown in Figure 10, and press the central confirmation switch to confirm the display screen.

[0089] The rotation speed of each wheel is calculated and displayed by the control unit based on the operating data of each electric motor from the electric motor control unit (or VCU).

[0090] Since there are multiple electric motors (four in this embodiment), the rotation speed of each electric motor will be displayed sequentially. However, in the event of an abnormality, the status of the abnormal electric motor will be displayed as an interrupt, indicating a rotation abnormality, as shown in Figure 11.

[0091] (5) A head-up display is provided for the driver to see while seated in the driver's seat of the control unit and facing forward while operating the vehicle, and a camera is provided to monitor the driver's line of sight (if the control unit is in the cabin, it is located in the upper right position of the windshield).

[0092] The control system then automatically slows down and provides straight-line assistance when it detects from the camera footage that the driver has shifted their gaze away from the road ahead.

[0093] At the same time, the control unit displays a message on the head-up display instructing the user to view the monitor information.

[0094] Finally, in a work vehicle equipped with a display unit 3 (LCD monitor 3) that is compatible with both engine and battery specifications, the fuel supply port for the engine specification and the power cord outlet for the battery in the battery specification are located on the same side of the vehicle body.

[0095] Furthermore, if the driver's seat is positioned to one side or the other, a fuel supply port and a power cord outlet for the battery should be provided on the driver's side of the vehicle.

[0096] <Other Embodiments>

[0097] (1) Figure 12 shows an embodiment of the outlet 10b for the power cord 18 to the battery when the work vehicle is a combine harvester.

[0098] The combine harvester has a running gear 12 on the lower side of the chassis 10, with a pair of left and right crawler tracks 11 that travel on the soil surface. On the left and right sides of the chassis 10 are a threshing device for threshing and sorting the stalks of grain that are carried and supplied by the feed chain, a grain tank 13 for temporarily storing the grain, and a grain auger 14 for discharging the grain stored in the grain tank 13 to the outside of the machine. The grain auger 14 moves up and down by operating an auger lifting cylinder when discharging grain.

[0099] A harvesting device is installed in front of the threshing device, suspended from the front end of the chassis 10 so as to be able to move up and down relative to the soil surface by a harvesting lifting cylinder. This device includes a grass-separating body that separates unharvested grain stalks from the front end, a lifting unit that raises the separated grain stalks, a cutting blade unit that cuts the raised grain stalks, and a supply adjustment and conveying unit that scoops up the cut grain stalks and adjusts the handling depth during conveyance before handing them over to the feed chain.

[0100] An operating device 15 for controlling the operation of the combine harvester and a driver's seat 16 are provided at the upper rear of the harvesting device. An electric motor 17, an electric motor control device, a battery control device, and a 48V battery are mounted below the driver's seat 16, and the grain tank 13 is located at the rear.

[0101] The 48V battery power cord 18 extends towards the rear right side of the vehicle through the right-side square pipe 10a that makes up the chassis 10, and exits from the outlet 10b, which is the opening at the rear end of the right-side square pipe 10a.

[0102] Furthermore, the outlet 10b, where the power cord 18 exits from the rear of the right-side square pipe 10a, is located on the extension of the pivot point 19 that opens the grain tank 13 outwards.

[0103] Therefore, when opening the grain tank 13 outward around the pivot point 19, it is possible to prevent the power cord 18 from being unintentionally pulled or twisted.

[0104] Furthermore, the portion of the power cord 18 extending from the outlet 10b is folded forward and stored between the slope on the right side of the grain tank 13 and the protective cover when not in use.

[0105] (2) Figure 13 shows another embodiment of the outlet 10b for the power cord 18 to the battery when the work vehicle is a combine harvester.

[0106] Specifically, a cord reel 20 for storing the cord is provided near the discharge port 14a at the tip of the grain auger 14.

[0107] The 48V battery power cord 18 extends towards the right rear of the machine through the right-side square pipe 10a that makes up the chassis 10, extends upward along the vertical discharge pipe 21 that transports the grain discharged from the grain tank 13 after exiting the outlet 10b, and reaches a cord reel 20 located at the tip of the grain auger 14, and extends from the cord reel 20 toward the front of the tip of the grain auger 14.

[0108] The cord reel 20 rotates with an electric motor, and the electric motor rotates in sync with the extension of the grain auger 14, automatically adjusting the length of the power cord 18 that extends along the grain auger 14. Furthermore, if the power supply for the control device 15 that controls the operation of the work vehicle is a 12V low-voltage battery, the voltage is converted from the 48V battery by a DC / DC converter and charged, and the power cord 18 of the 48V battery also serves as the charging cord. [Explanation of symbols]

[0109] 3. Display unit (LCD monitor) 10b Dispensing opening 16. Driver's seat 18 Power cord

Claims

1. In a work vehicle equipped with a display unit (3), When the display unit (3) is configured as an engine specification with an engine installed as the prime mover during production, the engine specification display screen is activated by the prime mover specification switch to display the fuel consumption per unit time for each operating condition, and the available working time is displayed from the fuel consumption per unit time. When an electric motor is selected as the prime mover during production, the prime mover specification switch activates the electric motor specification display screen, which shows the battery consumption per unit time for each operating condition, and then displays the remaining working time based on the battery consumption per unit time. Only one of the engine specifications display screen or the electric motor specifications display screen is displayed on the display unit (3). In the case of an electric motor-equipped tractor, the work vehicle is characterized by having left and right front-wheel drive motors for the left and right front wheels and left and right rear-wheel drive motors for the left and right rear wheels, and displaying the rotation speed of each wheel on a display unit (3).

2. The work vehicle according to claim 1, characterized in that the control device automatically categorizes the operating state based on the PTO rotation speed and speed setting, calculates and records the fuel consumption per unit time or battery consumption per unit time used for each operating state category, and when an operating state category is selected, the display unit (3) displays the start and end times of the work, the PTO rotation speed and average vehicle speed during this period, the fuel consumption per unit time, and the battery consumption per unit time.

3. The work vehicle according to claim 1 or 2, characterized in that, by selecting the operating state and field, the control device calculates the total amount of fuel or battery required to perform work in the field, and if the current amount of fuel or battery in the work implement is insufficient, the display unit (3) displays a replenishment instruction before work begins.

4. The work vehicle according to claim 1, characterized in that when an abnormality occurs in the electric motor, the state of the abnormally operating electric motor is displayed as a rotation abnormality with an interrupt.

5. The work vehicle according to claim 4, characterized in that the user presses a liquid crystal monitor selection switch (6) provided on the handle (2) to enter liquid crystal monitor selection mode, presses the right or left switch of the direction and confirmation switch (7) to change from the basic display screen of the electric motor specification display screen to the display screen of the rotation speed of each wheel, and presses the confirmation switch to confirm the display screen.

Images