JP3557906B2 - LCD device for agricultural machinery - Google Patents

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a liquid crystal display of an agricultural machine, and can be used for a tractor or the like .
[0002]
[Prior art]
Conventionally, a tractor, a combiner, or the like includes a safety mechanism that connects a working unit so as to be able to move up and down by driving a hydraulic actuator and that checks the operation of the actuator when a vehicle engine is started until a predetermined release operation is performed. there were.
[0003]
[Problems to be solved by the invention]
By the way, in such a conventional apparatus, when an operator or a beginner who is unfamiliar with the agricultural machine operates the machine body, the safety mechanism operates because the power transmission unit of the traveling system or the PTO system is connected and the engine is turned on, which is dangerous. I don't know when the engine is running, when the engine starts, the safety mechanism works and the hydraulic elevating device does not work, or what to do when you finish the work and try to run on the road at relatively high speed In addition, there is a danger of erroneous operation without knowing what operation is required to cancel the operation of the safety mechanism, and there is a problem that even if there is no danger, the operation takes time.
[0004]
[Means for Solving the Problems]
The present invention has been proposed in view of the above-mentioned problems, and has taken the following technical measures. That is, the working machine is connected to the rear of the machine so as to be able to move up and down freely, a liquid crystal display 72 is provided in the instrument panel 70, and the liquid crystal display 72 displays the vehicle speed, the number of rotations of the PTO, and the tillage depth set value . In the agricultural machine, when the engine of the agricultural machine is started, when the engine is in a start-prohibited state, character information for calling attention to operation is displayed on the liquid crystal display 72, and a safety mechanism for inhibiting the lifting and lowering operation of the work machine after the engine is started. When the vehicle is working, character information urging operation of the hydraulic control lever is displayed on the liquid crystal display 72, and when detecting a vehicle state assuming high-speed driving , attention is drawn to connect the left and right brake pedals. A liquid crystal display device for an agricultural machine, characterized in that information is displayed on a liquid crystal display 72.
[0005]
BEST MODE FOR CARRYING OUT THE INVENTION
Hereinafter, embodiments of the present invention will be described with reference to the drawings. First, a description will be given of the configuration of the traveling power transmission system. Reference numeral 1 denotes a tractor provided with front wheels 2 and 2 and rear wheels 3 and 3 at the front and rear portions of the fuselage, respectively. The speed is appropriately reduced by a transmission and transmitted to the front wheels 2 and 2 and the rear wheels 3 and 3.
[0006]
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 having four speed steps, and a subtransmission device 9 having four speed steps. 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. Specifically, a switch 12 for increasing or decreasing the speed of the main transmission 8 is provided on a handle portion of the auxiliary transmission operation lever 10, and by pressing this switch 12, the first gear to the fourth gear can be appropriately selected. A sub-transmission shift position sensor 14a is provided at the rotation base of the sub-transmission operation lever 10, and when the sub-transmission operation lever 10 is rotated in the front-rear direction, the sub-transmission 9 moves in the range of LL, L, M, and H. Four-speed shifting can be performed.
[0007]
Note that, in this case, the sub-transmission operation lever 10 switches the sub-transmission 9 while tilting the sub-transmission device 9 in the horizontal direction. When the lever is tilted sideways, the shift sensor 15 is turned on. The reverse clutch 7 is once held in a neutral state, and is set to a state in which gear shifting is possible. Although not shown, a main shift position sensor 14b is provided at a movement position (shift completion position) of the actuator that switches the main transmission device 8. A switch 16 for switching between forward and backward movement is provided at a rotation base of the reverse operation lever 13 for switching between forward and backward movement.
[0008]
The output side of the shift controller EP is connected to a step-up solenoid 17 for controlling the step-up of the reverse clutch 7, a forward solenoid 18 for switching the reverse clutch 7, and a reverse solenoid 19, and furthermore, to move the actuator of the main transmission 8 forward and backward. Are connected to the four main shift solenoids 20 to be moved. Reference numeral 22 shown in FIG. 3 is a monitor lamp for displaying a shift position, and reference numeral 24 is a shift lock switch for inhibiting the operation of the reverse clutch 7.
[0009]
When an operation member such as the sub-transmission operation lever 10 is operated, the reverse clutch 7 is temporarily disengaged to be in a neutral state, the actuator is operated to move the shift shifter (not shown), and it is determined that the shifter has moved to a predetermined position. A control circuit is incorporated so that the reverse clutch 7 can be connected again when it is confirmed by the sensor 14. 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.
[0010]
The rotary tillage device 36 has a main cover 38 that covers the tillage portion, and a rear cover 39 pivotally 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.
[0011]
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 plow 30 is controlled by a hydraulic elevating controller (WX) that controls a hydraulic elevating system. As shown in FIG. 4, the hydraulic lifting system controller (WX) includes a control lever 45 that moves the working machine up and down, a lift arm sensor 46 that detects the rotation angle of the lift arm 29, and a plowing depth adjustment that sets the plowing depth. The dial 47, the depth sensor 40, the rotation position sensor 42, the draft sensor 48, the raising position adjustment dial 49, the inclination adjustment dial 50, the stroke sensor 33, and the inclination sensor 51 for detecting the left and right inclination of the tractor 1 are connected. In addition, the hydraulic elevating controller (WX) includes a switch 52 for detecting the ON state of the PTO, a check switch 53 that is pressed to check the sensors and switches to a check mode, and a work machine when the reverse operation lever 13 is operated backward. Switch 54, a sensitivity switch 55, a switch 56 for manually rotating the main cover 38 in the front-rear direction, a rotation auto switch 57 for automatically rotating the main cover 38, a horizontal switch 58, and a horizontal manual switch 59. Is connected.
[0012]
On the output side of the hydraulic elevating controller (WX), an elevating solenoid 60 for elevating and lowering the lift arm 29, a descent solenoid 61, an elongation solenoid 62 for extending and contracting the rolling hydraulic cylinder 32a, and a foreshortening solenoid are provided. 63, turning relays 64 and 65 for controlling the electric motor 41 for turning the main cover 38 are connected.
[0013]
With such a configuration, when the hydraulic control lever 45 is turned up and down, the working machine is position-controlled so as to have a height set by the hydraulic control lever 45, and when the tillage depth adjusting dial 47 is appropriately turned, The rotary tilling device 36 is controlled so that the cultivating portion of the rotary tilling device 36 is located at the adjustment position, and the work implement is controlled so as to tilt to the set tilt posture when the tilt adjustment dial 50 is turned. When operated to the side, the main cover 38 and the rear cover 39 are controlled to move in the pressed direction.
[0014]
The meter panel controller (M) shown in FIG. 5 is provided with a control unit 73 for controlling a liquid crystal display 72 incorporated in an instrument panel 70, and various sensor information is displayed according to a control program described later. . At this time, a plurality of different pieces of sensor information are displayed on the liquid crystal display 72 while the screen is divided. The sensor information displayed on the liquid crystal display 72 includes not only the sensor directly connected to the meter panel controller (M), but also the sensor information connected to the hydraulic pressure raising / lowering controller (WX) and the speed change controller (EP). It can be transmitted and displayed by communication.
[0015]
In the figure, reference numeral 74 denotes an engine rotation sensor that detects the rotation speed of the engine 5, 75 denotes a wheel rotation sensor that detects the rotation of the rear wheel 3, 76 denotes a PTO rotation sensor that detects the rotation speed of the PTO shaft, and 77 denotes a subtransmission. Reference numeral 9 denotes an H-speed detection sensor for detecting that the high-speed H has been switched, and 78 denotes a reset switch. An instrument panel 70 shown in FIG. 2 incorporates a tachometer 80, a water temperature gauge 82, and a fuel gauge 83 in addition to the various monitor lamps 22.
[0016]
The controllers are connected to each other via a communication line 85, and data is exchanged mainly with a hydraulic controller (WX) as a host controller. That is, the communication sequence is first performed between the hydraulic pressure raising / lowering controller (WX) and the meter panel controller (M), and then between the hydraulic pressure raising / lowering controller (WX) and the speed change controller (EP). It is.
[0017]
The symbol CLK used in the figure means a clock input. Next, the operation will be described based on the flowcharts of FIGS. FIG. 6 is a main flowchart. As is clear from the chart, position control, depth control, and horizontal control are normally performed independently, and communication is also performed at a constant cycle.
[0018]
When the work machine is raised and the safety mode is operating, for example, the operation of the hydraulic elevating system is prohibited because the elevating position of the lift arm 29 and the position set by the lift lever are different. In such a case, the safety mode is activated, and the safety mode is set to be transmitted to the meter panel controller (M) side (step S6). When the safety mode is released and the work implement is being raised, the set state is maintained in order to transmit to the meter panel controller (M) that the work implement is being raised (step S5). When the safety mode is released and the working machine is in the lowered state, the set state is set to transmit the set value of the till depth by the till depth adjustment dial 47 to the meter panel controller (M) (step S4).
[0019]
As shown in FIG. 7, when the safety mode is operating and the engine is operating (when there is a generator output), the liquid crystal display is displayed so that the hydraulic control lever 45 is turned up and down to release the safety mode. A command is issued to the device 72 (steps T3, T4, T5). FIG. 16 shows a character pattern displayed on the liquid crystal display 72. The operator can recognize from this instruction that the hydraulic control lever 45 needs to be turned up and down, and even a person unfamiliar with the operation can easily release the safety mode. After the release of the safety mode, actual measured values or theoretical values of the rotation speed of the PTO shaft and the vehicle speed are calculated (steps T6 and T7).
[0020]
Then, when the tractor 1 is moving forward and the PTO shaft is rotating and the work implement is rising, the lift arm 29 is raised to the left of the liquid crystal display 72 as shown in FIG. A picture that symbolizes the situation is displayed, the vehicle speed is displayed on the upper right side, and the PTO rotation speed is displayed on the lower side. When the lift arm 29 is lowered (step T11), the picture shown in FIG. 12 is displayed. When a certain time has elapsed from this state (step T12), the tillage depth set value is displayed in the portion where the lift arm 29 was displayed (FIGS. 13 and 14). In this case, a bar graph corresponding to the magnitude of the tillage depth value is displayed, and the larger the set value of the tillage depth, the greater the amount of the bargraph to be filled.
[0021]
When the vehicle speed and the number of rotations of the PTO shaft are very small, only "Shasok" and "PTO" are displayed, and no numerical values are displayed. In the flowchart of FIG. 8, when a start prohibition condition at the time of starting the engine occurs, the occurrence thereof is displayed prior to other display contents. In this embodiment, when the PTO switch 52 is turned on, a control circuit is incorporated to prohibit the start of the engine, and a caution mark is displayed on the liquid crystal display 72. Specifically, while the PTO switch 52 is ON and the engine is not operating, "PTO switch ON" is displayed as shown in FIG. 15 (steps U2, U3, U4). Then, if the engine is operating, the PTO rotation speed and the vehicle speed are displayed (steps U5 and U6). When the work machine is lifted at the ridge or the like, the picture of FIG. 11 is displayed on the left side of the liquid crystal display 72. (Step U8) When this is lowered, the picture of FIG. 12 is displayed (Step 10). As is apparent from this flowchart, when the PTO switch 52 is turned off and the sub speed change operation lever 10 is operated to the high speed side to select the H speed, the picture of FIG. 18 prompting to connect the left and right brake pedals is displayed. (Step U14). Therefore, the operator does not forget to connect the left and right brake pedals.
[0022]
Next, the flowcharts of FIGS. 9 and 10 will be described. The feature of this control program is that when a shift prohibition condition occurs when the main and sub transmissions 8 and 9 are operated, the occurrence of the shift prohibition condition is displayed prior to other display contents. . In this example, when the shift lock switch 24 is ON and when the reverse operation lever 13 is not in neutral, the liquid crystal display 72 is displayed so as to call the operator's attention.
[0023]
The communication is performed between the hydraulic elevating controller (WX) and the meter panel controller (M). If the hydraulic elevating system is in the safety mode, the safety state is transmitted to the meter panel controller (M). (Step C7) Then, when the safety mode is released and the work implement is rising, the fact that the operation mode is the up mode is transmitted to the meter panel controller (M) (Step C6), and when the work implement is lowered. Transmits the tillage setting value to be displayed on the liquid crystal display 72 (step C5). At this time, if the shift lock switch 24 that prohibits the forward / reverse switching of the reverse clutch 7 is in the ON state, transmission is performed to display “shift lock switch on” on the liquid crystal display 72 as shown in FIG. 17 (step C11). If the shift lock switch 24 is released and the forward / reverse switching operation is possible and the reverse operation lever 13 is at a position other than the neutral position when the engine is started, it is determined that the safety mode is in operation by the meter panel controller. A set state is set for transmission to (M) (step C10). When the shift lock switch 24 is OFF and the reverse operation lever 13 is in the neutral position when the engine is started and the safety mode is released, the control returns to the normal control, and the forward / reverse switching operation is enabled.
[0024]
The shift of the tractor 1 in this embodiment is performed by a command from a shift controller (EP), and various prohibition conditions are set for the tractor 1 to move forward and backward in order to avoid an erroneous operation and an unexpected start of the operator. Is set. In many cases, the operator does not know the details of the prohibition conditions and how to cancel it.If forward / backward operation is not possible, there is a risk of mishandling the machine and operating the levers and knobs to cause the aircraft to run away. Was extremely dangerous.
[0025]
However, in this embodiment, when the shift lock switch 24 is ON or when the condition at the time of starting the engine is in a prohibited state, the contents are displayed on the liquid crystal display 72, and an appropriate instruction on the release method or the like is given by the operator. The operation can be performed accurately without the risk of erroneous operation.
[0026]
【The invention's effect】
As described above, according to the present invention, the working machine is connected to the rear of the machine so as to be able to move up and down, and the liquid crystal display 72 is provided in the instrument panel 70. In an agricultural machine configured to display a value , when the engine of the agricultural machine is started, when the engine is in a start-prohibited state, character information for calling attention to operation is displayed on the liquid crystal display 72. When the safety mechanism that prohibits the lifting and lowering operation of the vehicle is working, the liquid crystal display 72 displays character information prompting the operation of the hydraulic control lever, and when detecting a vehicle state assuming high-speed running, the left and right brake pedals are operated. Since the information that calls attention to the connection is displayed on the liquid crystal display 72, when a novice or an operator unfamiliar with the work operates the machine, a malfunction may occur. It is possible effort to seek release operation of misunderstanding and safety mechanism eliminates starts quickly work, street the can be sufficiently ensured safety when running at high speed.
[Brief description of the drawings]
FIG. 1 is a side view of a tractor and a working machine.
FIG. 2 is a front view of an instrument panel.
FIG. 3 is a block diagram of a shift control unit.
FIG. 4 is a block diagram of a hydraulic lift control unit.
FIG. 5 is a block diagram of a meter panel control unit.
FIG. 6 is a main flowchart.
FIG. 7 is a flowchart for controlling a display pattern of the liquid crystal display.
FIG. 8 is a flowchart for controlling a display pattern of the liquid crystal display.
FIG. 9 is a main flowchart.
FIG. 10 is a flowchart for controlling a display pattern of the liquid crystal display.
FIG. 11 is a diagram illustrating a screen of a liquid crystal display.
FIG. 12 is a diagram illustrating a screen of a liquid crystal display.
FIG. 13 is a diagram illustrating a liquid crystal display screen.
FIG. 14 is a diagram illustrating a screen of a liquid crystal display.
FIG. 15 is a diagram illustrating a screen of a liquid crystal display.
FIG. 16 is a diagram illustrating a screen of a liquid crystal display.
FIG. 17 is a diagram illustrating a liquid crystal display screen.
FIG. 18 is a diagram illustrating a screen of a liquid crystal display.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Tractor 2 Front wheel 3 Rear wheel 7 Reverse clutch 8 Main transmission 9 Sub transmission 10 Sub transmission operation lever 13 Reverse operation lever 15 Shift detection sensor 24 Shift lock switch 29 Lift arm 32 Lift rod 36 Rotary tilling device 38 Main cover 39 Rear cover 40 Depth sensor 41 Electric motor 42 Rotational position sensor 72 Liquid crystal display WX Hydraulic elevating controller EP Shifting controller M Meter panel controller

Claims (1)

An agricultural machine having a working machine connected to the rear part of the machine so as to be able to move up and down, a liquid crystal display 72 provided in an instrument panel 70, and the liquid crystal display 72 displaying the vehicle speed, the number of rotations of the PTO, and the set value of the tillage depth. In this case, when the engine of the agricultural machine is started, when the engine is in the start prohibition state, character information for calling attention to operation is displayed on the liquid crystal display 72, and a safety mechanism for inhibiting the elevating operation of the working machine after the engine starts is operated. Is displayed on the liquid crystal display 72, the information prompting the operation of the hydraulic control lever is displayed . When detecting a vehicle state assuming high-speed running, information for calling attention to connect the left and right brake pedals is displayed. A liquid crystal display for an agricultural machine, wherein the liquid crystal display is displayed on a liquid crystal display 72.

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