JPH1042672A - Display device for working machine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To enable the quantitative, definite and easy visual understanding of a load level of a power plant. SOLUTION: This display device for a working machine is capable of displaying plural indices (figures) for changing the values thereof corresponding to the load level of a power plant in a larger size with increasing load side by side and displaying the index (figure) corresponding to the present load level among the plural ones in a display state discriminable from the other indices.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a display device of a work machine for displaying load information of a power plant.

[0002]

2. Description of the Related Art In a display device for a working machine described above, a diesel engine or the like is used in order for a worker to appropriately operate a combine for agricultural work, which is an example of a working machine, to perform a predetermined work (such as a mowing work). In order to inform the operator of the load information of the power plant (usually, the magnitude of the load is indicated by the amount of down from the reference engine speed at no load), for example, the magnitude of the Is represented by a bar graph (for example, see JP-A-4-3358).
No. 16).

[0003]

The display of the engine load by the bar graph has the advantage that the current load level can be easily grasped visually, but has the disadvantage that the magnitude of the load level is difficult to quantitatively understand. There is. The present invention has been made in view of such circumstances, and its purpose is to:
In order to solve the above-mentioned disadvantages of the related art, it is an object of the present invention to make it possible to quantitatively and clearly understand the load level of a power plant, and to easily grasp it visually.

[0004]

According to the first aspect of the present invention, an index whose value changes according to the load level of the power plant is displayed in a larger size as the load level of the power plant increases.

Therefore, the load level of the power plant can be quantitatively and clearly known from the displayed index value.
At the same time, the degree of the load level of the power plant can be easily grasped visually based on the size of the displayed index, so that the load level of the power plant can be accurately determined.

According to a second aspect of the present invention, in the configuration of the first aspect, a plurality of indices indicating a plurality of stages of the load level of the power unit are displayed side by side, and among the plurality of indices, the current state of the power unit is displayed. Are displayed in a display state that can be distinguished from other indices.

[0007] Therefore, the position of the index displayed differently among the plurality of indexes displayed side by side determines which of the plurality of levels the current load level of the power plant is in, for example, the current level. Compared to displaying only the index corresponding to the level with its size changed, it can be easily grasped visually, and the preferred means of the configuration of claim 1 can be obtained.

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment in which the present invention is applied to a combine for agricultural work as a working machine will be described below with reference to the drawings. As shown in FIG. 1, the combine has a reaper 12 provided at a front portion of a body V having a pair of right and left crawler traveling devices 11.
A control unit 13, a threshing unit 14 for threshing and sorting the harvested grain culm, a Glen tank 15 for storing grains supplied from the threshing unit 14, and the like are mounted behind. Here, the reaper 12
The threshing unit 14 and the like correspond to a working unit.

The cutting unit 12 receives a weeding tool 16 attached to the tip, a grain stalk raising device 17, a cutting blade 18 for cutting the root of the caused grain stalk, and a cut grain culm on the tip side. And a transporting device 19 for transporting to the threshing unit 14. Further, an ultrasonic sensor S1 for detecting the height of the cutting unit 12 from the ground and a stock sensor S2 for turning on when the grain stalk touches to detect that the cutting operation is being performed are provided. The height information from the ground by the ultrasonic sensor S1 is used for cutting height control when cutting the culm, and the detection information of the stock sensor S2 is used as one of control start conditions.

Further, in order to maintain the handling depth in the threshing unit 14 in an appropriate state, in order to detect the position of the tip of the transported grain culm transported by the transport device 19, a predetermined interval is provided in the culm length direction. A pair of ear sensors S3 (see FIG. 5) are provided. Then, based on the detection information of the spike sensor S3, the conveying leading end of the conveying device 19 is swung in the culm length direction with respect to the rear end such that the spike of the grain culm is positioned between the pair of spike sensors S3. It is moved to adjust the handling depth.

The left and right crawler traveling devices 11 are configured to be able to individually drive up and down with respect to the machine body V. As a result, it is possible to perform the rolling control for maintaining the body V horizontal regardless of the inclination of the ground or maintaining the body V at the set angle. For this purpose, a rolling sensor S4 for detecting the inclination of the body V with respect to the horizontal is provided.

The threshing unit 14, as shown in FIG.
1, a feed chain 22 for transporting grain culms supplied from the mowing unit 12, a sorting device B including a torsion 23 and a rocking sorting plate 24, a first port 2 for grain recovery.
5, and a second port 26 for collecting a mixture of grain and straw waste. Of the processed material threshed in the handling room A, the single-grained product is supplied to the receiving net 2 provided at the lower part of the handling room A.
7 and leaked to the sorting device B,
7 falls into the sorting device B from the rear end.

The swinging sorting plate 24 of the sorting device B includes
3 includes a Glen pan 28 located above, a chaff sheave 29 located behind and a Glen sheave 30 located below. In the chaff sheave 29, the interval between adjacent strip-shaped members (referred to as chaff opening) is changed by simultaneously changing the angle of the plurality of strip-shaped members arranged in the processing object transfer direction around the horizontal axis. A chaff opening sensor S8 using a potentiometer for detecting the chaff opening.
(See FIG. 5).

The torsion 23 is used to blow off the straw chips on the oscillating sorting plate 24. The larger the degree of opening of the fan case cover 23a, the greater the amount of air that escapes from the opening. The wind force (referred to as toumi wind force) exerted on the processed material on the swing sorting plate 24 is reduced. A toumi wind sensor S9 (see FIG. 5) using a potentiometer for detecting toumi wind is provided.

As for the sorting device B, the control (sorting control) for adjusting the opening degree of the chaff and the wind power of the turtle according to the conditions such as the amount, type, and humidity of the processed material is performed as described above.
The grains leaking from the grain sieve 30 are oscillated on the sorting plate 2
The mixture of the grain and the straw waste collected from the first port 25 provided below and stored in the Glen tank 15 and dropped from the rear end of the chaff sheave 29 or the rear end of the Glen sheave 30 is discharged from the second port 26. It is collected and returned to the swing sorting plate 24.

Next, FIG. 3 shows a power transmission system. Diesel engine E as a power unit mounted on the fuselage V
Is transmitted to the threshing unit 14 via the threshing clutch 31 and the traveling clutch 32 and the continuously variable transmission 33
Is transmitted to the mission section 34 of the crawler traveling device 11 via the. Part of the output transmitted to the transmission section 34 is transmitted to the reaping section 12 via the reaping clutch 35. S7 is a threshing switch for detecting the on / off state of the threshing clutch 31, and S5 applies a magnetic field to the flywheel ring gear of the engine E to obtain a sine wave of a frequency corresponding to the number of teeth per unit time. S6 is a rotation speed sensor for detecting the engine rotation speed, which is constituted by an electromagnetic pickup.
Is a vehicle speed sensor provided in the mission section for detecting the vehicle speed.

A continuously variable transmission 33 for increasing or decreasing the vehicle speed
Is manually operated by a shift lever and automatically operated by an electric motor. That is, since the engine speed decreases as the engine load increases, the vehicle runs at a constant speed when the engine speed is optimum, but when the load increases and the engine speed decreases, the vehicle speed is reduced and If the load is reduced by reducing the threshing processing amount and conversely, if the load is reduced and the engine rotation speed becomes higher than the optimum rotation speed, the vehicle speed is increased to increase the cutting amount, that is, the threshing processing amount, so that the continuously variable transmission is performed. Vehicle speed control is performed to increase or decrease the running speed by performing a gear shift operation on the device 33. However, it does not become faster than the preset maximum vehicle speed.

As shown in FIG. 4, a display panel unit C for inputting command information such as start / stop of each control and displaying various information such as notification information to be notified to a worker in the operation of the combine is provided. As an integrated panel combining a liquid crystal display module and a membrane keyboard, the panel is provided at a position that is easy for the operator of the control unit 13 to see and operate. On the front surface of the display panel unit C, a display screen 1 as a display means and key input units 2, 3, and 4 for inputting information are provided. The display screen 1 is composed of a liquid crystal graphic display of a dot matrix type. On this screen, at least various kinds of information information including operating information of the combine, such as an hour meter (operating time), an engine speed, and a load state, are displayed. Is done. The key input units 2, 3, and 4 are configured by push-button switches, and include a start / stop switch 2 for each control, a changeover switch 3, and a storage switch 4.

Next, the control structure of the combine is shown in FIG. The meter controller 7 and the control unit 8 are each configured using a microcomputer, and are communicably connected to each other in an RS485 interface format. Stock sensor S among the sensors
2. Each detection information of the head sensor S3, the rotation number sensor S5, the threshing switch S7, the straw sensor S11, and the fuel sensor S10 for detecting the remaining amount of fuel is input to the meter controller 7, and the ultrasonic sensor S1, The detection information of the rolling sensor S4, the vehicle speed sensor S6, the chaff opening degree sensor S8, and the wind power sensor S9 are input to the control unit 8. The information of each sensor is centrally managed by the meter controller 7, and the above-described notification information is displayed on the display screen 1 based on the information.

On the other hand, from the meter controller 7, an actuator (oscillation motor) M1 for adjusting the handling depth,
A drive signal for an AES (automatic engine stop) actuator (relay or the like) M2 is output, and the control unit 8 outputs cutting height control and rolling control actuators M3 to M4, vehicle speed control, and chaff opening adjustment. Signal is output to each of the electric motors M5 to M7 for controlling the wind power and the wind power of the windmill. In addition, the AES actuator M2 is operated in response to detection of an abnormality in the operating state or the like (for example, when the discharge sensor S11 is turned on).
Operates to cut off fuel supply to the engine and automatically stop the engine. Then, the meter controller 7 and the control unit 8 drive the actuators M1 to M4, the electric motors M5 to M7, and the like based on the detection information of each sensor and the preset control information and the like, and perform the above-described control ( (Depth control, AES control, cutting height control, rolling control, sorting control, vehicle speed control, etc.).

The operation state of the key input units 2, 3, and 4 in the display panel unit C is detected by the meter controller 7. The start / stop switch 2 has a plurality of switches corresponding to each control as shown in FIG. 4 to instruct start and stop for each control described above, and each switch is also used for start and stop. . That is, when the switch corresponding to the active control is pressed, the control is stopped, and when the switch corresponding to the stopped control is pressed, the control is activated. The changeover switch 3 has two different operation states, specifically, for manually switching the control state,
The switch is configured to be switchable between an ON state in which the switch is connected to ground and an open state in which the switch is not pressed.

Next, the activation of each control state on the combine side will be described with reference to the control flowchart of the meter controller 7 shown in FIGS. 6 and 7. When the main key is turned on and the drive power supply is turned on, initialization of flags and the like is performed, and then communication control processing with the control unit 8, management of notification information based on information of each sensor, display screen 1 A display control process and a work control process for each work unit, such as the above-described handling depth adjustment, are performed.
Although not shown, the control unit 8 also performs the same communication control processing and work control processing except for the management and display control processing of the notification information.

In the display control process (FIG. 7), operation information indicating the control state of each part of the machine is sequentially displayed on the display screen 1 as shown in FIG. That is, the model is displayed until a predetermined time (about 2 seconds) elapses, and after the predetermined time elapses, an abnormal display is performed until the system is in a normal state, and then the engine is started and the set rotation speed (500 rpm) or more is displayed. Displays the hour meter and waits until. Engine speed is 500 rpm
When m exceeds m, the engine speed is displayed until the working conditions of the actual mowing work are satisfied, and further, the engine load is displayed as the actual working state (cutting state) is reached. The working conditions are threshing switch S7 and stock sensor S
2 are turned on, and when the neutral switch (not shown) and the reverse switch (not shown) are off (that is, when the vehicle is traveling forward), it is determined that the condition is satisfied.

FIG. 8A shows an hour meter (operating time).
(B) shows a bar graph display showing the magnitude of the engine speed by moving along the right side of the screen when the engine speed increases, (c) and (d) show 1 to 4
The display of level 1 and level 3 is shown at the load level represented by the numbers up to (the larger the number, the greater the load). The remaining fuel amount is indicated by a bar graph on the left side of each display.

Here, the display screen 1 displays an index (a number from 1 to 4) whose value changes in accordance with the load level of the engine E, in a larger size as the load increases. Specifically, a plurality of indices indicating a plurality of levels (four levels) of the load level of the engine E are displayed side by side in the example of the figure, and among the indices,
The indicator corresponding to the current load level (1 and 3 in the figure) can be distinguished from other indicators, that is, the other indicators are displayed as black positives against a white background, and the current load level is displayed. Are displayed as white negatives against a black background.

[Another Embodiment] Next, another form of display on the display screen 1 will be described. FIG. 9 does not display a plurality of indices indicating a plurality of levels (four levels) of the load level of the engine E side by side, but instead displays an index of the current load level (in the figure,
Only 3) is shown with the size set for that load level. In this case, since the right side of the screen is vacant, the number of revolutions of the engine E is displayed by a number (rpm) there. The index indicating the load is not limited to the number as described above, but may be a symbol that can be used to determine the magnitude of the load, or a character such as “small, medium, or large”. Further, as described above, the index of the current load level among the plurality of arranged indexes is displayed separately from the other indexes, not limited to the negative-positive image. For example, only the index of the current load level is displayed. May be blinked.

FIG. 10 shows that when the rotation speed of the engine E reaches an appropriate rotation speed (2600 rpm), "rpm" on the right side of the screen is displayed.
Is changed to “SET OK” to make it easy to recognize that the rotation speed is appropriate.

As the display means 1, an image display device such as a CRT display other than the liquid crystal graphic display can be used.

The power unit E is not limited to a diesel engine, and various types of engines can be used. In the above embodiment, the present invention is applied to a combine for agricultural work as a working machine. However, the present invention can also be applied to various agricultural work machines other than the combine, a civil work machine, and the like. The specific contents of the notification information including the operation information and the specific configurations of the working unit and the display unit are appropriately set according to the working machine.

[Brief description of the drawings]

FIG. 1 is a side view of a combine.

FIG. 2 is a side perspective view of a threshing unit.

FIG. 3 is a power transmission diagram of the combine.

FIG. 4 is a front view of a display panel provided in the combine.

FIG. 5 is a block diagram of a control configuration of the combine.

FIG. 6 is a main flowchart of control.

FIG. 7 is a flowchart of display control.

FIG. 8 is a diagram of a display screen for displaying operation information.

FIG. 9 is a diagram of a display screen in another form for displaying operation information.

FIG. 10 is a diagram of a display screen in another form for displaying operation information.

[Explanation of symbols]

 E Power unit 1 Image display means

Claims (2)

[Claims] 1. A display device of a work machine for displaying load information of a power plant, wherein an index whose value changes according to a load level of the power plant is displayed in a larger size as the load of the power plant is larger. A display device of a work machine provided with display means for displaying. 2. The display means displays a plurality of indices indicating a plurality of stages of the load level of the power plant in a row, and among the plurality of indices, the indicator corresponds to a current load level of the power plant. The display device for a work machine according to claim 1, wherein the index to be displayed is displayed in a display state that can be distinguished from other indexes.