JP2011217691A - Indication device of working vehicle - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an indication device of a working vehicle, which can indicate the rotation number and accumulated operation time of an engine in a state of being capable of being easily recognized by a user, and can simultaneously lower the cost.SOLUTION: In the indication device of the working vehicle, a numeric indication portion 27 for indicating the rotation number and accumulated operation time of the engine is formed in a state of being capable of indicating the numerical characters of a plurality of figures and the numerical characters after a decimal point, and the numeric indication portion 27 is operated in a form that control means for controlling the operation of the numeric indication portion 27 indicates the decimal point and the numerical characters after the decimal point in an operation time indicate state and does not indicate the decimal point and the numerical characters after the decimal point in a rotation number indicate state in a form of being capable of being switched into the rotation number indicate state for indicating the rotation number of the engine or into the operation time indicate state for indicating the accumulated operation time.

Description

  The present invention relates to a display device for a work vehicle that includes a display unit that displays an engine speed and an accumulated operation time, and a control unit that controls the operation of the display unit.

Conventionally, the display device for a work vehicle has been configured as follows as applied to a combine which is an example of a work vehicle.
That is, a display device using a dot matrix type liquid crystal display is provided as a display means in the steering section of the vehicle body. The state in which the engine speed is displayed on this display screen and the cumulative operating time on the display screen There is one configured to switch to a state in which the hour meter is displayed (see, for example, Patent Document 1).

  Thus, in the case of using a dot matrix type liquid crystal display, not only numerical information but also, for example, the engine speed is displayed in a bar graph format, and other information other than the engine speed and the hour meter is displayed in characters. Since various forms of information such as display can be displayed, the engine speed and the accumulated operating time (hour meter) can be displayed in a state that is easy to visually understand and easy for the user to identify.

JP-A-10-75625

  In the conventional display device, since the display means uses a dot matrix type liquid crystal display, the structure of the display means becomes complicated, and the structure of the control means for controlling the operation of such display means is also complicated. Therefore, there is a disadvantage that the cost is high.

  An object of the present invention is to provide a display device for a work vehicle that can reduce the cost while being able to display the engine speed and the accumulated operation time in a state that is easy for the user to identify. It is in.

  A display device for a work vehicle according to the present invention includes display means for displaying an engine speed and an accumulated operation time, and control means for controlling the operation of the display means, wherein the display means has a plurality of digits. The control means is configured to switch between an engine speed display state for displaying the engine speed and an operation time display state for displaying the accumulated operation time, and the operation In the time display state, the decimal point and the number after the decimal point are displayed, and in the rotation speed display state, the display means is operated in such a manner that the decimal point and the number after the decimal point are not displayed.

  According to the first characteristic configuration, the display means only needs to be able to display a multi-digit number and a decimal point, and the engine speed display state for displaying the engine speed and the operation time display state for displaying the accumulated operation time. The display can be simplified as compared with the display using a dot matrix type liquid crystal display, and the engine rotation can be used to display multiple digits and decimal points. The configuration can be made simpler than that in which the number and the cumulative operating time are displayed side by side at the same time, and the configuration of the control means for controlling the operation of the display means can be simplified. As a result, the configuration can be simplified and the cost can be reduced.

  The control means operates the display means in such a manner that the decimal point and the number after the decimal point are displayed in the operating time display state, and the decimal point and the number after the decimal point are not displayed in the rotational speed display state. The user can easily recognize which of the engine speed and the accumulated operating time is being performed.

  By the way, since the accumulated operating time is used as a guideline for carrying out periodic inspections, etc., accurate time information is required. Since numbers after the decimal point can be displayed, accurate time information can be displayed. On the other hand, the engine speed fluctuates because the load on the engine fluctuates, etc., and even if a small value is displayed accurately, it is meaningless, so a small number after the decimal point is not displayed In this way, it is possible to appropriately display with a plurality of digits.

  Therefore, a work vehicle capable of simplifying the configuration of the display means and the control means and reducing the cost while being able to display the engine speed and the accumulated operation time in a state that is easy for the user to identify. The display device can be provided.

  In addition to the first feature configuration, the second feature configuration of the present invention is configured such that the control unit operates the display unit in a form in which the decimal point blinks in the operating time display state. is there.

  According to the second feature configuration, in the operating time display state, the display unit displays the decimal point in a blinking state, so that the user visually determines that the time is counted by the blinking of the decimal point. This makes it easy to recognize that the operating time is displayed.

  According to a third feature configuration of the present invention, in addition to the first feature configuration or the second feature configuration, the control means displays zero in the first digit of the plurality of digits in the rotation speed display state. In other words, the display means is configured to operate in such a manner that the display means is operated.

  The engine speed fluctuates due to fluctuations in the load applied to the engine. In particular, the first digit fluctuates frequently and the display state tends to become unstable.

  Therefore, in the third feature configuration, the control means is configured to operate the display means so as to display zero in the first digit of the multiple-digit number display in the rotational speed display state, so that the engine operates. In this state, the engine speed can be displayed in a stable display state by avoiding the display state becoming unstable due to frequent fluctuations in numbers.

  According to a fourth feature configuration of the present invention, in addition to any one of the first feature configuration to the third feature configuration, the control unit displays the display in the operation time display state when power supply is started. When the engine start determination condition is satisfied, the display means is operated in the rotation speed display state.

  According to the fourth feature configuration, when the power supply is started prior to the start of work, the accumulated operation time is displayed on the display means, so that the operator can perform maintenance by checking the accumulated operation time. It can be determined whether or not it is necessary. After that, when the engine start operation is executed by the operator and the engine start determination condition is satisfied, the engine speed is displayed on the display means. Therefore, after the engine is started, the operator Whether or not the engine speed is suitable for the work can be determined from the display content of the display means. For example, if the engine speed is not suitable for the work, the engine output is adjusted or the engine load is It is possible to determine whether or not the value is excessive.

  According to a fifth characteristic configuration of the present invention, in addition to the fourth characteristic configuration, the engine start determination condition is that the engine rotational speed is equal to or higher than a set rotational speed set to be lower than the idling rotational speed. It is in.

  According to the fifth feature configuration, even if the operator executes the process of starting the engine, the engine start determination condition is not satisfied when the engine speed is in a low speed rotation state less than the set rotation speed. The engine speed is not displayed on the display means.

That is, in the low-speed rotation state, the engine speed is changing rapidly in order to start the engine from the stopped state, and such a rapidly changing engine speed is displayed on the display means. However, since the number frequently fluctuates and the display state becomes unstable, the accumulated operation time is displayed if the engine speed is less than the set speed.
If the engine speed is equal to or higher than the set speed, it is assumed that the engine start determination condition is satisfied, and the display means is operated in the speed display state to display the engine speed.

  As a result, it is possible to display the engine speed in a stable display state by avoiding that the displayed number fluctuates frequently and the display state becomes unstable.

  According to a sixth feature configuration of the present invention, in addition to the fourth feature configuration, the engine start determination condition is that a set time has elapsed since the start of power supply, or the engine start switch is operated to a start position. The set time elapses from the time when it is set.

  According to the sixth characteristic configuration, until the set time elapses from when the power supply is started, or until the set time elapses after the engine start switch is operated to the start position, Since the engine start determination condition is not satisfied, the engine speed is not displayed on the display means.

  In a work vehicle, as soon as power supply to the control means and display means is started, the engine start switch is operated to the start position immediately after that and the engine is started to start work. It is thought that.

  Therefore, when the set time elapses from when the power supply is started, it is assumed that the engine start determination condition is satisfied, the display means is operated in the rotation speed display state, or the engine start switch is operated to the start position. When the set time has elapsed from when the engine is started, the display means is operated in the engine speed display state, assuming that the engine start determination condition is satisfied.

  In other words, the engine is started from the stopped state until the set time elapses after the power supply is started or until the set time elapses after the engine start switch is operated to the start position. Therefore, even if the engine speed that changes rapidly is displayed on the display means, the number changes frequently and the display state changes. Since the engine speed becomes unstable, the accumulated operating time is displayed if the engine speed is less than the set speed. When the engine start determination condition is satisfied after the set time elapses, the display means is operated in the rotation speed display state to display the engine rotation speed.

  As a result, it is possible to display the engine speed in a stable display state by avoiding that the displayed number fluctuates frequently and the display state becomes unstable.

It is a whole side view of a combine. It is a transmission system diagram. It is a control block diagram. It is a top view of a control part. It is a front view which shows a display apparatus. It is a flowchart of control operation. It is a figure which shows the example of a display of an information display part. It is a flowchart of control operation of another embodiment.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.
As shown in FIG. 1, a combine as an example of a work vehicle includes a pair of left and right crawler type traveling devices 1, and a cutting process in a front portion of a traveling body equipped with a control unit A including a driver seat 2 so as to be movable up and down. The device 4 is connected and provided with a threshing device 5 and a grain tank 6 in a state of being arranged in the lateral direction of the aircraft body at the rear side portion of the aircraft frame 3, and harvesting grains such as rice and wheat while traveling in the field, It is comprised so that the harvested cereals may be threshed.

  In other words, the reaping processing device 4 is configured such that the reaping portion frame 4a is pivoted up and down with respect to the machine body frame 3 by the lifting hydraulic cylinder 7 so that the reaping processing device 4 is positioned at the front end of the reaping processing device 4. The weeding tool 4b is moved up and down into a descending working state where the weeding tool 4b is lowered to the vicinity of the ground, and a rising non-working state where the weeding tool 4b is lifted from the ground. Then, when the traveling machine body is caused to travel with the cutting processing device 4 in the descending work state, the cutting processing device 4 uses the weeding tools 4b adjacent to the planted cereals located on the plurality of planting lines to be cut. The planted cereals of the strips are split, and the planted cereals from each weeding tool 4b are raised and processed by the corresponding pulling device 4c and cut by the clipper-shaped cutting device 4d. The harvested cereal meal from 4d is conveyed backward by the conveying device 4e and supplied to the start end of the threshing feed chain 5a of the threshing device 5.

  The threshing device 5 feeds the tip side to a handling chamber (not shown) while sandwiching the stock side of the harvested cereal by the threshing feed chain 5a and transporting it backwards, and a handling cylinder that rotates the harvested cereal. (Not shown). Further, the threshing grains conveyed from the threshing device 5 are collected and stored in the grain tank 6, and the threshing grains stored in the grain tank 6 are externally provided by a screw conveyor type grain discharging device 8. It is configured to discharge. Further, the waste straw after the threshing process is transported to the rear of the machine body by the feed chain 5a and the waste straw transporting device 9, and is shredded by the waste straw processing device 10.

  As shown in FIG. 2, the output of the engine E provided below the driver seat 2 is transmitted to the threshing device 5 via the threshing clutch 14, and the output of the engine E is transmitted to the belt tension type transmission device 11. Is transmitted to the input shaft 13 of the transmission case 12, and the power of the input shaft 13 is transmitted to the cutting processing device 4 via the cutting output shaft 16 and the cutting clutch 17.

  The transmission case 12 is provided with a hydrostatic continuously variable transmission M. The transmission output of the continuously variable transmission M is a left and right crawler type traveling device via left and right multi-plate friction clutch brakes 18R and 18L. 1 is transmitted. The continuously variable transmission M functions as a traveling transmission that continuously changes the forward travel speed and the reverse travel speed, and a shift operation lever 19 that can be operated from the neutral position to each of the forward operation area and the reverse operation area. (See FIG. 1).

  The left and right clutch brakes 18R and 18L are operated by hydraulic pistons 20R and 20L, respectively, and are configured so that power is intermittently connected to the left and right crawler type traveling devices 1 and functions as a brake when the power is cut off. Yes.

  As shown in FIG. 4, the front panel portion 22 </ b> A located in front of the driver seat 2 in the controller A is provided with a control lever 21 that can be swung in the front-rear direction and the left-right direction. A display device F for displaying various kinds of information is provided at a front portion of the side panel 22B located on the side, and a speed change operation lever 19 is provided at a rear portion of the side panel 22B. .

  The front part of the side panel part 22B is formed in a shape in which the outer edge part 22Ba is curved. In addition, an inclined surface 22Bb that is inclined obliquely forward and upward is formed at the front portion of the lateral panel portion 22B, and the horizontally elongated trapezoidal or rectangular display device F is easily seen from the driver seat 2 on the inclined surface 22Bb. It is attached diagonally forward and outward.

As shown in FIG. 5, the display device F includes a liquid crystal display type information display unit 23 and a notification display unit 24 that notifies various abnormal states.
The information display unit 23 includes a fuel display unit 25 that displays the amount of fuel stored in a fuel tank (not shown) on the left side, and a water temperature display unit 26 that displays the temperature of the cooling water of the engine E on the right side. In addition, a numerical value display unit 27 as a display means for displaying the accumulated operation time obtained by accumulating the engine rotation speed Nx and the operation time of the engine E is provided at the left and right central portions. Further, on the upper side of the numerical value display unit 27, a time display identification unit 28 showing a pattern that the cumulative operation time is displayed on the numerical value display unit 27 and a numerical value display unit 27 are displayed. Is provided with a rotational speed display identifying unit 29 that indicates that the engine rotational speed is Nx.
The numerical value display unit 27 includes four number display units 27A that display four-digit numbers and one decimal point display unit 27B that displays a decimal point.

  The notification display unit 24 includes a load abnormality lamp 30 that displays a load abnormality of the engine E, a storage capacity full lamp 31 that indicates that the storage capacity of the grain in the grain tank 6 is full, and a waste straw transporter. Drainer abnormal lamp 32 that indicates that a waste clog is generated in the path, and No. 2 recovery unit abnormal lamp that indicates that a transport clog is generated in the second recovery unit in the threshing device 5 33, an oil pressure abnormality lamp 34 for indicating that the pressure of the oil supplied for lubricating the engine E is decreasing, and indicating that the charge amount of the battery V (see FIG. 3) is low. The battery abnormality lamp 35, the headlamp display lamp 36 for indicating that the lighting of a headlight (not shown) is commanded, and the lighting of one of the left and right direction indicating lamps are commanded by a direction indicator (not shown). Have It is provided with a direction indicator display lamp 37 for displaying that.

  As shown in FIG. 3, the hydraulic cylinder 7, the left and right hydraulic pistons 20 </ b> R and 20 </ b> L, the display device F, and a control unit H as control means for controlling the operation of the starter 45 are provided. Is configured to control the operation of the hydraulic cylinder 7, the left and right hydraulic pistons 20R and 20L, the display device F, and the starter 45 based on the detection information of various sensors.

  A cutting lift command sensor 38 for detecting the operation position of the control lever 21 in the front-rear direction and a steering command sensor 39 for detecting the operation position of the control lever 21 in the left-right direction are provided. It is input to the control unit H.

  When the control unit H detects that the control lever 21 is swung forward from the neutral operation position n by the cutting / lifting command sensor 38, the control unit H determines that the lowering command is commanded, and the control lever 21 is neutral. When it is detected by the cutting lift command sensor 38 that it has been swung backward from the operation position n, it is determined that the lift command has been commanded. And the cutting processing apparatus 4 is raised / lowered by operating the hydraulic cylinder 7 by operating the control valve 40 of the hydraulic cylinder 7 based on the ascending command and the descending command.

Further, the control unit H determines that the left turn command is instructed when the steering command sensor 39 detects that the control lever 21 is swung to the left from the neutral operation position n. When the steering command sensor 39 detects that the lever 21 has been swung to the right from the neutral operation position n, it is determined that a right turn command has been commanded. Then, the control valves 41R and 41L are operated based on the left turn command and the right turn command to operate the hydraulic pistons 20R and 20L, thereby operating the clutch brakes 18R and 18L, thereby turning the traveling machine body.
Incidentally, if the tilt angle from the neutral operation position n in the left-right direction of the control lever 21 is less than the set value, the clutch brakes 18R, 18L are switched to the clutch disengaged state, and when the tilt angle becomes larger than the set value, the clutch The hydraulic pistons 20R and 20L are operated so as to switch the brakes 18R and 18L to the brake operating state.

  As shown in FIG. 3, an engine speed sensor S1 that detects the engine speed Nx, a grain quantity sensor S2 that detects that the amount stored in the grain tank 6 is equal to or greater than a set amount, and a transport path for the waste straw. Exhaust straw clogging sensor S3 that detects the occurrence of clogging of the waste straw, and a second rotation sensor S4 that detects the number of revolutions of a second item collection screw conveyor (not shown) provided in the threshing device 5. The detection information of each sensor S1 to S4 is input to the control unit H. When various abnormalities such as those described above are detected based on the detection results of the sensors described above, the control unit H turns on a lamp corresponding to the abnormal content in the notification display unit 24.

  The control unit H is connected to a brake detection sensor S5 for detecting that the parking brake pedal 42 provided in the control unit A is depressed, and a main switch 43 described later is in a starting position ( When the brake detection sensor S5 detects that the brake is in operation, the engine E is started and the brake detection sensor S5 is in the brake operation state. If it is not detected, the engine E is not started.

  The numerical value display unit 27 in the information display unit 23 is configured to be able to display a plurality of digits (specifically, four digits) and a decimal point, and the control unit H displays a rotational speed display state for displaying the engine rotational speed Nx. And the hour meter display state as the operating time display state for displaying the cumulative operating time. In the hour meter display state, the decimal point and the number after the decimal point are displayed, and in the rotation speed display state, the decimal point and the number after the decimal point are displayed. The information display unit 23 is configured to operate in a form that does not display.

  The control unit H is configured to operate the information display unit 23 in such a manner that the decimal point blinks in the hour meter display state, and further, in the rotation speed display state, one of the digits of the plural digits is displayed. The information display unit 23 is configured to operate in such a manner that zero is displayed on the display.

  When the power supply is started, the control unit H operates the information display unit 23 in the hour meter display state, and the engine speed Nx is set to a lower speed than the idling speed Ns. If it becomes above, it is comprised so that the information display part 23 may be operated in a rotation speed display state as what the engine starting discrimination conditions were satisfied.

Next, the display control of the information display unit 23 by the control unit H will be specifically described with reference to the flowchart of FIG.
When the main switch 43 as the engine start switch operated by the key K is operated to the power-on position (ON), the control unit H is activated by turning on the power of the battery V, and the main switch 43 is turned on. When operated to the cutting position (OFF), the supply of power is stopped. When the main switch 43 is operated to the start position (ST), the starter start switch (hereinafter referred to as start switch) 44 is turned on to operate the starter 45.

  When the main switch 43 is operated to the power-on position (ON) and the power is turned on and activated, the numerical display unit 27 is operated in the hour meter display state (step 1), and the main switch 43 is moved to the start position (ST ) Or the hour meter display state is maintained until the main switch 43 is operated to the power-off position (OFF) (steps 2 and 3).

  Incidentally, the fuel display unit 25 and the water temperature display unit 26 are activated after the main switch 43 is operated to the power-on position (ON) and until the main switch 43 is operated to the power-off position (OFF). It will always be displayed.

  In the hour meter display state, for example, as shown in FIGS. 7 (a) and 7 (b), a cumulative operation that is an accumulated time of the time that the engine E is operating using a four-digit numerical display and a decimal point, respectively. Display time. And in this hour meter display state, the decimal point display part 27B which shows a decimal point is blinked and displayed. Further, the time display identification unit 28 is set in the display state, and the rotation speed display identification unit 29 is set in the non-display state.

  When a specific example is added, FIG. 7A shows a case where the accumulated operation time is “50.5 hours (50 hours 30 minutes)”, and FIG. 7B shows the accumulated operation time “850.5 hours”. (850 hours 30 minutes) ". At this time, the decimal point display portion 27B indicating the decimal point is displayed in a blinking state. When the cumulative operating time exceeds 1000 hours, the decimal point display unit 27B is not displayed and the cumulative operating time is displayed in four digits beyond the decimal point.

  When the main switch 43 is operated to the start position (ST), the controller H activates the start switch 44 when the brake detection sensor S5 detects that the parking brake pedal 42 is depressed. Is operated (steps 2, 4 and 5). As a result, the engine E is started.

  When the engine E is started and the engine speed Nx detected by the engine speed sensor S1 is detected to be equal to or higher than the set speed Ns, the information display unit 23 is operated in the speed display state. (Steps 6 and 7).

  In the rotational speed display state, as shown in FIGS. 7C and 7D, the information display unit 23 is operated so as to display the engine rotational speed Nx using only the 4-digit numerical display in the numerical display unit 27. . That is, in the rotation speed display state, the decimal point and the numbers after the decimal point are not displayed, and the decimal point is kept off and the corresponding number is displayed among the first to thousandth digits.

  In this rotational speed display state, the engine rotational speed Nx is displayed in such a manner that zero is always displayed in the first place of the 4-digit numerical display. Further, the time display identification unit 28 is set in the non-display state, and the rotation speed display identification unit 29 is set in the display state.

  The engine speed display state is maintained until the engine speed Nx falls below the set speed Ns or until the main switch 43 is operated to the power-off position (OFF) (step 8). When the main switch 43 is operated to the power-off position (OFF), all displays on the information display unit 23 are switched to the non-display state (step 9), and the process is terminated.

  As described above, the information display unit 23 includes the time display identification unit 28 and the rotation number display identification unit 29, which are instruction units for identification. In the hour meter display state, the decimal point and the numbers after the decimal point are displayed. In the state of displaying the number of revolutions, the decimal point and the number after the decimal point are not displayed on the numerical value display unit 27. Moreover, since the decimal point is blinked, the operator can display the numerical value display unit. The difference is intuitively understood simply by visually observing the numerical value displayed in 27, and it is possible to immediately determine whether it is the accumulated operating time or the engine speed.

[Another embodiment]
(1) In the above embodiment, the decimal point display unit 27B indicating the decimal point is blinked in the hour meter display state. Instead of such a configuration, the decimal point display unit 27B is displayed in the hour meter display state. May be displayed in a continuously lit state.

(2) In the above-described embodiment, zero is displayed in the first place of the four-digit number display in the rotation speed display state. A number may be displayed.

(3) In the above-described embodiment, the 4-digit number is displayed on the number display unit 27. However, the number of display digits on the number display unit 27 may be a plurality of digits and is not limited to four digits. Absent.

(4) In the above embodiment, when the engine speed Nx is equal to or higher than the set speed Ns set to be lower than the idling speed, the control unit H displays the engine speed as a condition that the engine start determination condition is satisfied. The information display unit 23 is operated in the state, but instead of such a configuration, as shown in FIG. 8, when the set time elapses from when the main switch 43 is operated to the start position (ST). The information display unit 23 may be configured to operate in the engine speed display state, assuming that the engine start determination condition is satisfied (step 6). Since the processes other than step 6 in FIG. 8 are the same as those in FIG.

  Although not shown, instead of the above configuration, when the set time elapses from when the main switch 43 is turned on and the power supply is started, it is assumed that the engine start determination condition is satisfied and the engine speed is displayed. You may comprise so that the information display part 23 may be actuated.

(5) In the above embodiment, the display device provided in the combine as a work vehicle is shown. However, the present invention is not limited to the combine, and various work vehicles such as a paddy work vehicle, a tractor, or a construction work vehicle. It can also be applied to.

  The present invention can be applied to a work vehicle in which an engine speed and a cumulative operating time of an installed engine are displayed on a display device.

27 Display means 43 Engine start switch H Control means Nx Engine speed Ns Set speed ST Start position

Claims (6)

A display device for a work vehicle, comprising: display means for displaying the engine speed and accumulated operation time; and control means for controlling the operation of the display means.
The display means is configured to be able to display a multi-digit number and a decimal point,
The control means switches between a rotation speed display state for displaying the engine rotation speed and an operation time display state for displaying the accumulated operation time, and displays a decimal point and a number after the decimal point in the operation time display state. And the display apparatus of the working vehicle comprised so that the said display means may be operated in the form which does not display a decimal point and the number below a decimal point in the said rotation speed display state.   The work vehicle display device according to claim 1, wherein the control means is configured to operate the display means in a form in which the decimal point is blinked and displayed in the operation time display state.   The said control means is comprised so that the said display means may be act | operated in the form which displays zero in the one place of the said multiple digit number display in the said rotation speed display state. Display device for work vehicles.   The control means operates the display means in the operation time display state when power supply is started, and operates the display means in the rotation speed display state when an engine start determination condition is satisfied. The work vehicle display device according to claim 1, wherein the work vehicle display device is configured.   The work vehicle display device according to claim 4, wherein the engine start determination condition is that the engine speed is equal to or higher than a set speed that is set lower than an idling speed.   5. The engine start determination condition is that a set time elapses from when power supply is started or a set time elapses from when an engine start switch is operated to a start position. Display device for work vehicles.

Images