JP2004276791A - Indicator for working vehicle - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a working vehicle equipped with a symbol mark indicating work contents or traveling speed by a design, and a liquid crystal indicator related with numerical values indicating the contents meant by the mark. <P>SOLUTION: The liquid crystal indicator 22 of the indicator for a working vehicle equipped with a controller controlling an indication state of an instrument panel 21 and the liquid crystal indicator 22, and sensors and switches for inputting indicated information to the controller, is composed of three areas divided in a lateral direction. At a forefront part of the liquid crystal indicator, a symbol mark section S1 indicating the work contents and a vehicular state including a traveling state by the design, a numerical value section S2 indicating numerical value information of the contents meant by the symbol mark section S1, and a unit section S3 indicating a unit of the numerical value information of the numerical value section S2 are successively arranged. The controller comprises a controlling device switching/indicating a plurality of the symbol marks flashing on and off or moving like an animation, switching/indicating a present value in the numerical value section S2 on the basis of the information from the sensor detecting the contents of the symbol mark, and indicating the unit of the unit section S3 so as to switch to any one of plural units. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a display device for a work vehicle such as an agricultural machine, and can be used for a tractor, a combine, or the like.
[0002]
[Prior art]
2. Description of the Related Art Various types of work vehicles such as agricultural machines such as tractors and combiners are equipped with various instruments and display vehicle speed, engine speed, PTO speed, and the like. On the other hand, the work vehicle incorporates many automation technologies such as steering direction control, tillage depth control, and elevation control, and therefore, various instruments for displaying a control state are required.
[0003]
In addition to the pointer-type display device, the instruments include a liquid crystal display device that displays information obtained from various sensors such as a vehicle speedometer and an engine speed sensor as a numerical value or a band graph, For example, it is known from Japanese Patent Application Laid-Open No. 6-320989.
[0004]
[Patent Document 1]
JP-A-6-320989
[Problems to be solved by the invention]
The liquid crystal display device used for the display device of the above-mentioned instruments has a method of sequentially displaying a plurality of sensor information or a method of simultaneously displaying a plurality of sensor information. The liquid crystal display includes a case where the work content is displayed as a symbol mark which is displayed as a picture and a case where information which can be digitized is displayed as a number.
[0006]
However, a display device that displays the symbol mark and the numerical information in association with each other has not been known. Further, the digitized information such as the vehicle speed merely displays the numerical value, and there is no display of a symbol mark related to the numerical value.
[0007]
Therefore, for example, the vehicle speed is displayed as a numerical value, and the display device is used by the operator to determine whether the running state of the vehicle is high or low based on the numerical value.
[0008]
Furthermore, vehicle components, for example, in a working vehicle capable of mounting many types of tires, the vehicle speed of the vehicle, the horsepower configuration, etc. are changed according to the type of tire used, so the combination information of these becomes enormous, There was no device that could easily display the functions within the range guaranteed by the design of the work vehicle.
[0009]
SUMMARY OF THE INVENTION It is an object of the present invention to provide a work vehicle provided with a liquid crystal display device that associates a symbol mark for displaying a work content or a traveling speed with a picture with a numerical value representing the meaning of the mark.
[0010]
[Means for Solving the Problems]
The above object of the present invention is achieved by the following means.
The invention according to claim 1 includes an instrument panel 21 having a liquid crystal display device 22, a controller 43 for controlling a display state of the liquid crystal display device 22 on the instrument panel 21, a sensor and a switch for inputting display information to the controller 43. In a display device of a work vehicle provided with a class, the liquid crystal display device 22 divides the vehicle into at least three parts in the left-right direction of the vehicle traveling direction, and displays the state of the vehicle including the work content and the traveling state at the top of the three divided areas with a picture. The symbol mark column S1, the numerical column S2 for displaying the numerical information of the meaning of the symbol mark column S1, and the unit column S3 for displaying the unit of the numerical information of the numerical column S2 are arranged in this order. A plurality of symbol marks are switched and displayed in the symbol mark column S1, and the symbol marks are blinked or animated, and the symbol marks are given. A control device is provided for switching and displaying the current value in a numerical value column S2 based on information from a sensor for detecting the content of the lock, and for switching the unit in a unit column S3 to one of a plurality of types of units. It is a display device of a work vehicle.
[0011]
According to the first aspect of the present invention, the symbol mark field S1 representing the state of the vehicle including the work content and the running state, the numerical value field S2 for displaying the numerical information of the meaning of the symbol mark field S1, and the numerical value field S2 Can be displayed on the display panel, and each display column can be independently switched and displayed.
[0012]
The invention according to claim 2 is the work vehicle according to claim 1, wherein the controller 43 includes a control device that changes the speed of blinking or animated movement based on information from a sensor that detects the contents of the symbol mark column S1. Display device.
[0013]
According to the second aspect of the invention, the controller 43 changes the blinking speed or the animation-like movement speed based on the information from the sensor that measures the contents of the symbol mark section S1, so that it is easy to draw the operator's attention.
[0014]
【The invention's effect】
According to the first aspect of the present invention, the symbol mark field S1 representing the state of the vehicle including the work content and the running state, the numerical value field S2 for displaying the numerical information of the meaning of the symbol mark field S1, and the numerical value field S2 Can be displayed on the display panel, and the respective display columns can be switched and displayed independently, so that the symbol mark column S1, the numerical value column S2 and the unit column S3 are switched collectively. Since the storage capacity in the controller 4 can be reduced as compared with controlling, the production cost can be reduced. Further, the symbol mark requires less storage capacity than the case where the contents of the symbol are stored in a multilingual language.
[0015]
According to the invention described in claim 2, the controller 43 changes the blinking or the animation-like movement based on the information from the sensor that measures the contents of the symbol mark section S1, so that the pilot can easily attract the pilot's attention and the control mistake can be made. This has the effect of disappearing.
[0016]
BEST MODE FOR CARRYING OUT THE INVENTION
Hereinafter, embodiments of the present invention will be described with reference to the drawings.
First, FIG. 1 shows a side view of a tractor as an example of a work vehicle. The tractor 1 is provided with front wheels 2 and 2 and rear wheels 3 and 3 at the front and rear portions of the body, respectively, and appropriately reduces the rotational power of an engine 5 in a hood 4 by a transmission in a transmission case 6 to reduce the speed of the front wheels 2. , 2 and the rear wheels 3, 3.
[0017]
The transmission case 6 accommodates a reverse clutch 7 composed of a hydraulic clutch for switching between forward and reverse, a main transmission device 8 at four speeds, and a subtransmission 9 at three speeds. The transmissions 8 and 9 are electrically controlled by an operating member such as an operating lever or a push button switch. A command for shifting is issued from a shifting controller (EP) to a hydraulic actuator (not shown) for moving the shifter.
[0018]
A speed change switch (not shown) for increasing / decreasing the speed of the main transmission 8 is provided on a handle portion of the sub speed change operation lever 10, and by pressing this switch, the first speed to the fourth speed can be appropriately selected. A sub-transmission shift position sensor (not shown) is provided at the rotation base of the sub-transmission operation lever 10. When the sub-transmission operation lever 10 is rotated in the front-rear direction, the sub-transmission 9 is set to the L, M, and H positions. Three speeds can be changed within the range.
[0019]
Next, the configuration related to the hydraulic lifting control device will be described. A hydraulic cylinder case 27 is fixedly provided in the upper rear part of the transmission case 6, a single-acting hydraulic cylinder 28 is provided in the hydraulic cylinder case 27, and lift arms 29 are provided on both left and right sides of the hydraulic cylinder case 27. 29 is rotatably supported. Lift rods 32, 32 are connected between the lift arms 29, 29 and the lower links 30, 30, and one of the lift rods 32 is composed of a double-acting hydraulic cylinder 32a that can be extended and contracted. A stroke sensor 33 for detecting the length of the hydraulic cylinder 32a is provided on the lateral side of the hydraulic cylinder 32a. In addition, a rotary tilling device 36 as a working machine is connected to a rear end of a three-point link mechanism 35 including a top link 34 and lower links 30 and 30 so as to be able to move up and down.
[0020]
The rotary tillage device 36 has a main cover 38 that covers the tillage portion, and a rear cover 39 that is rotatably supported at the rear thereof, and detects a change in tillage depth by sliding the lower edge of the rear cover 39 into contact with the ground. . Therefore, a depth sensor 40 is provided above the rear end of the main cover 38. The main cover 38 and the rear cover 39 are configured to be rotatable around the tilling shaft 37, and the front and rear rotation of these covers is performed by an electric motor 41.
[0021]
A rotation position sensor 42 that detects the position of a cover that is rotated back and forth by an electric motor 41 is provided on a mast support portion of the rotary tilling device 36. Hydraulic elevating control such as tillage depth control, rolling control, position, and depth of the rotary tillage device 36 is controlled by a hydraulic elevating controller (WX) that controls a hydraulic elevating system.
[0022]
FIG. 2 shows a plan view of the measuring panel.
The instrument panel 21 includes a full-dot liquid crystal display device 22, a pointer-type engine tachometer, and various lamps. In order to display various information, the display device 22 shown in FIG. 2 divides the inside of the liquid crystal display device 22 into a block S2 for displaying numbers such as a running speed and a PTO rotation speed, and a number in front of the number block. Are arranged in a block S1 for displaying what the image means, blocks S3 for displaying the unit of each number are arranged behind the numbers, and each information is displayed in combination for each information to be displayed.
[0023]
FIG. 3 shows a control circuit diagram of the display device of the measuring panel. A controller 43 for controlling the liquid crystal display device 22 incorporated in the instrument panel 21 is provided, and various types of sensor information are displayed according to a control program described later. Is done. At this time, a plurality of different pieces of sensor information are displayed on the liquid crystal display device 22 while the screen is divided. The sensor information displayed on the liquid crystal display device 22 includes, in addition to the sensors directly connected to the display panel controller 43, information of sensors connected to a travel controller 45 for travel control and a hydraulic lift controller (WX) (not shown). Can be transmitted via communication and displayed. The controller 43 for controlling the liquid crystal display device 22 includes a PTO input switch, a PTO operation shift switch 47, an oil pressure input switch 48, a model changeover switch group 51, a display changeover switch 50, and a sub-shift shifter switch group 52. Are located.
[0024]
Further, an engine rotation sensor 54 for detecting the rotation speed of the engine 5, a wheel rotation sensor 55 for detecting the rotation of the rear wheel 3, a radiator water temperature sensor 56, a fuel gauge 49, and the like are arranged. Inputs from these sensors output oil pressure, water temperature, battery charge amount, fuel amount, engine speed, vehicle speed, glow lamp (for generating heat rays at engine start), electronic meter (with notes), and the like. .
[0025]
FIG. 4 is a flowchart showing a procedure of display control of the liquid crystal display device.
By reading various sensors and operation switches and selecting the vehicle class by operating the appropriate buttons on the display device, the calculation data of the class of the input model can be set. Next, when a tire size, a vehicle speed, and a language to be used are respectively selected, display contents specified by narrowing down the tire size, the vehicle speed, and the language to be used in the selected class are displayed.
[0026]
Next, an example of the display contents of the initial liquid crystal display screen of the display panel will be described with reference to FIG. The glow symbol is displayed on the sub-shift position display section and the main shift display section when the glow lamp output condition is present, without displaying the sub-shift position display section and the main shift display section (FIG. 5A). . This display is continued during the output of the on-glow lamp even when the initial display time has ended, and the display shifts to the normal display screen in conjunction with the end of the output of the on-glow lamp.
[0027]
When there is no glow lamp output condition, normal display is performed without the sub-shift position display section and the main shift display section (FIG. 5B).
[0028]
Further, a sample of the normal display will be described with reference to FIG. FIGS. 6A to 6G show various display screens of a certain model. FIG. 6A shows the rotation speed of the rear PTO, and FIG. 6B shows the display of the mid PTO rotation speed. The blinking display behind and below the body of the tractor picture indicates that the display related to the rear PTO and the mid PTO is made. FIGS. 6C and 6D show examples in which the vehicle speed is displayed in miles and meters, respectively. FIGS. 6 (e) and 6 (f) show examples of displaying hour meter (cumulative use time from the time of production) and trip meter (reset use time). FIG. 6G shows a mileage display of the vehicle speed and an automatic switching display of the PTO.
[0029]
As can be seen from FIG. 6, the rabbit mark is a symbol mark indicating the sub-shift is "high speed", the turtle mark is "medium speed", and the snail mark is a symbol mark indicating "low speed". The numbers 1 to 4 on the right of the symbol mark indicate the gears in which the main transmission 8 is being executed.
[0030]
In addition, the upper right circle and the bar code wind band between them represent the amount of fuel in the fuel tank so that the amount of fuel in the fuel tank can be seen visually, the picture of the alcohol thermometer style below it and the bar code wind band between them represent the water temperature . The more the bar is extended, the more the fuel amount and the higher the water temperature.
[0031]
Also, as shown in FIGS. 9A to 9C, when the rabbit mark, the turtle mark, and the snail mark move in an animated manner according to the vehicle speed, the operator can more intuitively increase or decrease the vehicle speed. I can imagine the degree of Further, since the shift position information symbol is used, the memory of the display device can be used effectively.
[0032]
At this time, as shown in FIG. 10, the display cycle of the symbol mark with respect to the vehicle speed is stepwise (FIG. 10A) at a time interval of Δt (= 1 / T: T is frequency) shown in FIG. A method of continuously changing (FIG. 10B) is employed.
[0033]
Here, there is a numerical display portion at the lower right of the symbol mark such as a rabbit, and the number represents the content of the symbol mark. For example, “22.4 km / h” at the lower right of the rabbit mark in FIG. 6D indicates that the vehicle is traveling at a high speed of 22.4 km / h. It is easier to grasp the current state of the vehicle by looking at the symbol mark than simply looking at the numbers.
[0034]
FIGS. 7A to 7D show various display screens of a normal display sample.
FIG. 7A shows a display state when the PTO switch 47 and the like are off in the rear PTO display, and FIG. 7B shows a display state when the rotation speed of the rear PTO is less than 100 rpm. If the rotational speed of the rear PTO is less than 100 rpm, the rotational speed sensor cannot accurately measure the rotational speed, so the number is displayed as “<100 n / min”. As shown in FIGS. 7C and 7D, when there is no input from the vehicle speed display vehicle speed sensor and when the sub-shift position is "N", "0" blinks. FIGS. 7 (e) to 7 (h) show the display states of the minimum and maximum numbers of the hour meter and the trip meter, respectively. These displays are reset when the count value exceeds “9999” or “999.9”.
[0035]
FIGS. 8 (a) to 8 (f) show indicators for safely starting the engine. The respective symbols are displayed on the upper left symbol display portion of the display panel in the forward direction of the vehicle and a numerical value display portion adjacent thereto. appear.
[0036]
FIG. 8 (a) shows that the shift lever is operated when the vehicle is moving forward and returns to the neutral position, and FIG. 8 (b) shows that the shift lever is operated when the vehicle moves backward and returns to the neutral position. Is displayed. FIG. 8C shows the guidance display that the PTO switch 47 is turned off. FIG. 8 (d) shows that the auxiliary transmission lever 10 set to low speed is returned to the neutral position, and FIG. 8 (e) shows that the auxiliary transmission lever 10 set to intermediate speed is returned to the neutral position. 8 (f) shows that the auxiliary transmission lever 10 set at high speed is returned to the neutral position.
[0037]
Further, the display panel of the present embodiment switches the input line of the display controller 43 according to the model difference by using a switch group 51 so as to be able to cope with the case where the model (model) differs depending on the model class or the like. Since it is possible, it is configured such that a model change due to a difference in tire size or a difference in vehicle speed unit can be set by an operation in the machine by selecting an appropriate model from a display screen of the liquid crystal display device 22 or the like. .
[0038]
For example, in the case of working vehicles for export from Japan to overseas, even with the same model, there are many variations such as ordinary agri tires, turf tires and oversized tires, and the vehicle speeds are slightly different.
[0039]
Therefore, in the present embodiment, data composed of the in-mission speed reduction ratio and one type of tire size for each class is used as basic data, and this basic data is determined by inputting a harness or the like, thereby assuring the design. In the category of performance, even if the tire size is changed, the vehicle speed can be configured with the same meter panel in response to the change. It also supports the HST specification.
[0040]
For example, as shown in FIG. 11, it is possible to select an operation mode provided based on only one kind of tire size, and select mile display or metric display as a selection screen (FIG. 11B). Next, the operation state of the forward / backward detection switch (Power Shuttle), the model, the mid PTO, the rear PTO, the shift position, the PTO switch position, the engine oil pressure, and the state of the shift button can be automatically checked in order. At this time, if there is a failure point, the progress of the check is stopped.
[0041]
With such a contrivance, it is possible to express while replacing the dot matrix of the small block without increasing the capacity of the memory (not shown) in the controller 43.
[0042]
In addition, the character display is configured to be displayed in various national languages, and the switching can be selected by providing a switching screen during the display control of the liquid crystal display device 22 as shown in FIG.
In this way, a selection operation using the liquid crystal display can be set at the time of shipment to a display style suitable for each destination or a setting suitable for the user on site.
[0043]
Further, the selected language is stored in a storage element (EEPROM or the like) which can store the selected language even when the power supply to the display panel is cut off. The selected language is a matter that the user does not need to frequently change the setting. In the case of storing in the RAM or the like, when the panel power supply is lost, the contents are erased and reset, and the setting needs to be reset. By doing so, it can be reset when necessary.
[0044]
In addition, in order to change the storage, a display (inverted display lamp) indicating that the selection is made in the selection screen is performed, and the storage contents are automatically changed when the screen is switched to another screen. Then, there is no need to provide a separate decision switch or the like, and the change may be made at the above timing only when the stored content is different from the current stored content.
[0045]
The EEPROM has a limit on the number of times of rewriting (guaranteed about 100,000 times with current technology). If the limit is exceeded, the storage element will be damaged. Therefore, with the above configuration, rewriting is performed only when necessary, and it is not normal that the storage element is damaged and malfunctions during the lifetime of the tractor.
[0046]
When displaying the rotation speed and the vehicle speed of the PTO on the display panel, it is configured to be selectable (or displayable) only when the PTO shift is in somewhere (only when the PTO is being used). , You can immediately select and display the display you want to see.
[0047]
For example, when the vehicle speed, rear PTO, mid PTO, hour meter, and trip meter are displayed in a selectable (or automatic switching) mode, when the PTO is not working and the PTO shift is not performed, the display of the PTO rotation speed is displayed. unnecessary. Therefore, in such a case, there is an advantage that the display to be viewed can be immediately selected because the display is not skipped and displayed.
[Brief description of the drawings]
FIG. 1 is a side view of a tractor according to an embodiment of the present invention.
FIG. 2 is a plan view of a measurement board of the tractor of FIG.
FIG. 3 is a control circuit diagram of a display panel of a measurement panel of the tractor of FIG. 1;
FIG. 4 is a display control flowchart of a display panel of a measurement panel of the tractor of FIG. 1;
FIG. 5 is an initial display screen of a display panel of a measurement board of the tractor of FIG. 1;
FIG. 6 is a normal display sample diagram of the display panel of FIG. 5;
FIG. 7 is a normal display sample diagram of the display panel of FIG. 5;
FIG. 8 is a normal display sample diagram of the display panel of FIG. 5;
FIG. 9 is a normal display sample diagram of the display panel of FIG. 5;
10 is a diagram showing a relationship between a display switching cycle of the display panel of FIG. 9 and a vehicle speed.
FIG. 11 is a normal display sample diagram of the display panel of FIG. 5;
FIG. 12 is a normal display sample diagram of the display panel of FIG. 5;
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Tractor 2 Front wheel 3 Rear wheel 4 Bonnet 5 Engine 6 Transmission case 7 Reverse clutch 8 Main transmission 9 Sub transmission 10 Sub transmission operation lever 21 Instrument panel 22 Liquid crystal display device 27 Hydraulic cylinder case 28 Hydraulic cylinder 29 Lift arm 30 Lower link 32 Lift rod 32a Hydraulic cylinder 33 Stroke sensor 34 Top link 35 Three-point link mechanism 36 Rotary tilling device 37 Tilling shaft 38 Main cover 39 Rear cover 40 Depth sensor 41 Electric motor 42 Rotation position sensor 43 Controller 45 Travel controller 47 PTO shift switch 48 Oil Pressure input switch 49 Fuel gauge 50 Display changeover switch 51 Model changeover switch group 52 Sub-speed shifter switch group 54 Engine rotation sensor 55 Vehicle speed sensor 56 Radiator Data water temperature sensor

Claims (2)

An instrument panel 21 having a liquid crystal display device 22, a controller 43 for controlling the display state of the liquid crystal display device 22 on the instrument panel 21, and a display of a work vehicle including sensors and switches for inputting display information to the controller 43 In the device,
The liquid crystal display device 22 divides the vehicle into at least three parts in the left-right direction of the vehicle traveling direction. Areas of a numerical value column S2 for displaying numerical information having meaning and a unit column S3 for displaying a unit of the numerical information of the numerical value column S2 are sequentially arranged,
The controller 43 switches and displays a plurality of symbol marks in the symbol mark column S1, and blinks or gives an animation-like movement of the symbol mark, and sets the current value to a numerical value based on information from a sensor for detecting the content of the symbol mark. A display device for a work vehicle, comprising: a control device that switches and displays a unit S2 in a column S2, and displays a unit in a unit column S3 so as to be switchable to any one of a plurality of types of units. 2. The display device for a work vehicle according to claim 1, wherein the controller 43 includes a control device that changes the speed of blinking or animated movement based on information from a sensor that detects the contents of the symbol mark field S1. .

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