JP4966093B2 - Work vehicle - Google Patents

Description

  The present invention relates to a work vehicle such as a tractor, and more particularly to a display panel configured to be able to switch a display format in accordance with the state of the work vehicle.

  Conventionally, in an analog meter (analog vehicle meter) that displays multiple types of measured values with a pointer, multiple types of measured values can be arbitrarily switched and displayed on a dial with a single scale. A light-emitting display unit (light-emitting element) that indicates the measured value to be displayed is lit or blinked (see Patent Document 1).

  In the analog meter described in Patent Document 1, an operation switch provided separately from the meter body arbitrarily selects one value from among engine speed, water temperature, oil temperature, and boost pressure value, It is possible to display the dial on the dial plate with a scale, and the light-emitting display portion indicating the selected measurement value is turned on.

  In addition, while displaying an arbitrarily selected measurement value, when another measurement value exceeds a preset warning value, the display can be automatically switched to another measurement value.

  On the other hand, a display panel (meter panel) composed of a liquid crystal panel has been devised that automatically switches the display instrument in accordance with the 4WD setting mode (see Patent Document 2).

  This display panel is configured to display the vehicle speed on driving and the engine speed or PTO shaft speed on the liquid crystal panel during work.

JP 2006-98377 A JP 2004-9998 A

  However, in the analog meter of Patent Document 1, since it is necessary to manually switch a plurality of measured values, the operation is complicated, and it is possible to switch between the vehicle speed and the engine speed that are most necessary for the working vehicle. There wasn't.

  In addition, the meter panel of Patent Document 2 is composed of a liquid crystal display, and it is difficult to instantly recognize changes in the engine speed and vehicle speed and the amount of change, making it difficult to operate the work vehicle corresponding to various situations. It was.

  Accordingly, the present invention provides a work vehicle that has good workability and can travel safely on the road by displaying the engine speed or the vehicle speed on an analog meter on the display panel according to the working state and non-working state of the work vehicle. For the purpose.

The present invention includes an analog meter (2) including a dial having at least a scale (5) and a pointer (4) indicating a value on the dial in front of the driver's seat (17), and a light emitting element. Work vehicle (10) provided with a display panel (1) having an indicator (6) provided so as to be lit and provided with a three-point link mechanism (19) to which a work machine can be attached at the rear end of the traveling machine body (13 ). In
Control means (30) for calculating and outputting the engine speed and vehicle speed;
Automatic switching means (8) for collectively activating or disabling a plurality of automatic controls for automatically controlling a work machine or a vehicle in a working state;
When the automatic switching means (8) is in an operating state, the analog meter (2) displays the engine speed from the control means (30) and stops the indicator (6) from emitting light. Display switching means (31, 32) for displaying the vehicle speed from the control means (30) on the analog meter (2) and switching the indicator (6) to emit light when the automatic switching means is in an invalid state. and, with a,
The analog meter (2) is switched by the display switching means (31, 32), and the dial (4) is switched without changing the dial scale (5).
The working vehicle (10) is characterized by the above.

Preferably , the scale (5) of the analog meter (2) is colored in different colors depending on the engine speed and the vehicle speed (5a, 5b),
The light emission color of the light emission display section (6) is set to the same color as the color of the scale (5b) for displaying the vehicle speed .

According to the present invention, the working vehicle normally sets the throttle to the maximum torque or the maximum output (rated speed) in the working state so that the engine speed becomes a predetermined value according to the load of the work machine. In the working state, the engine speed is displayed with an analog meter that makes it easy to understand the change and the amount of change, and makes it easy to set the target. As well as
When driving on the road, it is necessary to display the vehicle speed due to compliance with legal speeds. However, when driving on the road, the vehicle speed is displayed on the analog meter. Can do
By using one analog meter, an analog meter is installed on the display panel in a size that is easy to see, and the display is switched as described above, so that the driver can easily and surely perform proper operation. It can be performed.

Automatic switching means for operating collectively multiple automatic control for automatically controlling the working machine or vehicle in working state provided, in the working state, collectively various automatic control of the operating state by the automatic switching means In addition, it is possible to easily and reliably recognize engine speed or engine speed fluctuations such as engine drops with an analog meter to improve work accuracy and work efficiency.
Collectively by upper SL automatic switching means in a state that disables the plurality of automatic control, it is possible to prevent the vehicle or the working machine or moves unexpectedly, unnecessary operation, the operator, the analog meter By visually checking the vehicle speed, it is possible to travel safely on the road.

The indicator stops emitting light when the analog meter is displaying the engine speed, and the indicator light is emitted when the analog meter is displaying the vehicle speed, so the engine speed is displayed on the analog meter. It can be recognized whether the vehicle is displayed or the vehicle speed is displayed, and misrecognition of the display contents can be prevented.
The analog meter is switched by the switching means, and the dial scale is kept unchanged, and the movement of the pointer is simply switched between the engine speed and the vehicle speed, so the complicated and expensive display for switching the dial scale display. The apparatus is unnecessary, and the cost can be reduced.
In the case of working vehicles, compared to non-working traveling such as road traveling, the time during which the working traveling is performed is overwhelmingly long, and the time for displaying the engine speed on the analog meter is larger than the vehicle speed display. Overwhelmingly long. Therefore, if the analog meter to display the rotational speed of the engine, since the indicator (light-emitting display portion) does not emit light, without causing unnecessary arouse the operator, the operator will recognize the display of the engine speed in nature In addition, the number of light emitting display portions can be reduced and the light emission time can be greatly reduced, thereby reducing cost and saving energy.

  Further, when traveling on the road, unlike the normal work state, the operator can recognize that the vehicle speed is displayed and prevent misrecognition of the content displayed by the pointer.

And color of the scale of the car speed display, when the emission color of the light-emitting display unit for displaying the color of the same system, the operator can recognize that a naturally speed display, it is possible to prevent misidentification of the contents of the display.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. As shown in FIG. 6, the tractor 10 as a working vehicle according to the present embodiment has a traveling machine body 13 supported by front wheels 11 and rear wheels 12. An engine covered with a bonnet 14 is arranged at the front center part of the traveling machine body 13, and an operation part 21 surrounded by a cabin 20 is provided behind the bonnet 14. A three-point link mechanism 19 to which a work machine can be attached is provided at the rear end of the traveling machine body 13.

  As shown in FIG. 7, the driving unit 21 includes an operation unit 15 and a driver seat 17 behind the operation unit 15. The operation unit 15 includes a steering handle 16 and a display provided in front of the steering handle 16. It is comprised by the panel 1 grade | etc.,. A main speed change lever 18 is provided on the left side of the driver's seat 17 in the aircraft traveling direction, and the tractor 10 is changed in 16 steps by the main speed change lever 18.

  Next, the display panel 1, which is a main part of the present invention, will be described. As shown in FIG. 1, the display panel 1 includes an analog meter 2, a liquid crystal panel 3, an indicator (light emitting display unit) 6 indicating that the analog meter 2 displays the vehicle speed, and other indicator lights. A single analog meter 2 is disposed at the center of the meter panel 1, a liquid crystal panel 3 is disposed on the right side thereof, and an indicator 6 is disposed below the liquid crystal panel 3.

  The analog meter 2 includes a dial having a scale 5 and a pointer 4 for indicating a value on the dial. The scale 5 displays a vehicle speed in white on the outer peripheral side 5a for displaying the engine speed. The inner peripheral side 5b is painted in two colors, orange. The indicator 6 is provided so as to be lit or blinking by a light emitting element, and emits light in a color similar to the color of the scale 5b on the inner peripheral side for displaying the vehicle speed (in the case of the present embodiment, orange).

  Note that the color of the scale 5 is not limited to white and orange, and other colors such as red may be used. In that case, the indicator 6 is also provided so as to emit light in a color similar to the color for displaying the vehicle speed. Further, the scale 5 may be provided so as to emit light by the light emitting element.

  In addition, on the lower left side of the fuselage of the display panel 1, various operation switch groups 9 relating to switching to four-wheel drive and control such as autobrake are provided. A batch switch (automatic switching means) 8 is provided to collectively or inactivate various automatic controls required for the work implement or vehicle in the working state such as control, automatic inclination control, and automatic tilling control. . When the tractor 10 is in the working state, various automatic controls are activated by the batch switch 8, the light emitting element 8a on the left side is lit, and in the traveling state, the automatic control is disabled and the light emission on the traveling side is performed. The element 8b is turned on.

  The display panel 1 configured as described above will be described based on the block diagram shown in FIG. The tractor 10 includes five controllers (IC chips): a controller I (control means) 30, a controller II (automatic switching means) 33, a controller III 34, a controller IV (display switching means) 31, and a controller V (display switching means) 32. Are controlled by an engine rotation sensor 30a, an axle rotation sensor 30b, a PTO rotation sensor 30c, and other sensors 30d.

  The controller I30 is connected to the other four controllers and the lifting / lowering actuator 30e to perform lifting / lowering or attitude control, and the controller III 34 is connected to the transmission actuator 34a and the controller I to perform non-clutch shift control. The controller II33 is connected to an operation switch group 33a such as a batch switch 8, and based on whether the batch switch 8 is turned on or off, various automatic controls are collectively set to a working state or an invalid state via the controller I30.

  The controller I30 is also connected to an engine rotation sensor 30a, an axle rotation sensor 30b, a PTO rotation sensor 30c, and other sensors 30d. Based on output signals from various sensors, the engine rotation speed, the vehicle speed, and the PTO shaft rotation. The number is calculated. The controller I outputs the operation state of the tractor 10 to the controller IV31 based on the calculated engine rotation speed, vehicle speed and PTO shaft rotation speed, and an output signal from the controller II33 regarding the on / off of the batch switch 8.

  The controller IV31 and the controller V32 perform display control of the display panel 1. The controller IV31 displays the analog meter 2 on the controller V32 based on the on / off signal of the collective switch 8 input via the controller I30. And the display of the liquid crystal panel 3 and the lighting of the indicator 6 are controlled. The controller V32 operates the pointer 4 of the analog meter 2 based on the output signal from the controller IV31.

  Next, a display format of the display panel 1 when the tractor 10 is in a working state or a traveling state will be described with reference to FIGS. As shown in FIG. 3, the display panel 1 in the working state displays the engine speed on the analog meter 2 and the vehicle speed 3 a on the liquid crystal panel 3. In addition to the vehicle speed, the liquid crystal panel 3 also displays a PTO shaft rotation speed 3b, a shift speed 3c, a water temperature gauge 3d, and a fuel gauge 3e. At this time, since the analog meter 2 indicates the engine speed, the indicator 6 is in a non-lighting state.

  On the other hand, FIG. 4 shows the display panel 1 in the traveling state. In the traveling state, the analog meter 2 displays the vehicle speed, and the engine speed is displayed on the liquid crystal panel portion 3a in which the vehicle speed is displayed (in the working state) in FIG. At this time, since the analog meter 2 displays the vehicle speed, the indicator 6 is lit.

  As described above, the display panel 1 displays the engine speed on the analog meter 2 and the vehicle speed on the liquid crystal panel 3 in the working state, and displays the vehicle speed on the analog meter 2 and the liquid crystal panel 3 in the traveling state. Is provided to display the engine speed, and the engine speed and the vehicle speed are displayed on the analog meter 2 and the liquid crystal panel 3 in a contradictory manner according to the state of the tractor 10.

  Next, the operation of the display panel 1 will be described with reference to the flowcharts shown in FIGS.

  When the operator starts the tractor, a signal is output from the rotation sensors 30a and 30b to the controller I30. The controller I30 reads information from the rotation sensors 30a and 30b (S1) (S2), and calculates the engine speed and the vehicle speed (S3).

  When the rotation number is calculated in the controller I30, it is determined whether the tractor 10 is in the working state or the traveling state (non-working state) based on the on / off of the batch switch 8 calculated by the controller II33 (S4). . When the tractor 10 is determined to be in the working state, the traveling speed is displayed on the liquid crystal panel 3, and the engine speed is displayed on the analog meter 2 (S5). A signal is output to the controller IV31 (S6).

  If it is determined that the vehicle is traveling, a signal is output to the controller IV31 so that the engine speed is displayed on the liquid crystal panel 3 and the traveling speed is displayed on the analog meter 2 (S8) (S6).

  When an output signal from the controller I30 is input to the controller IV31 (S9) (S10), a signal is output to the controller V32 based on the signal input from the controller I30, and the engine speed or vehicle speed is output to the analog meter 2. It is displayed (S11).

  Next, the controller IV31 determines whether or not the display pattern of the liquid crystal panel 3 and the indicator 6 changes (S12). If there is a change in the display pattern, a predetermined time elapses (S13). A new display pattern is displayed on (S14). If the display pattern does not change, the data is output to the liquid crystal panel 3 and the indicator 6 without time delay (S14).

  By configuring the display panel 1 as described above, in the working state, the collective switch 8 is enabled, various automatic controls are collectively activated, and the engine speed or It is possible to easily and reliably recognize rotational speed fluctuations such as engine drops, and improve work accuracy and work efficiency.

  On the other hand, in a non-working state such as running on the road, various automatic controls are invalidated collectively by the collective switch 8 to prevent the vehicle or work machine from moving unexpectedly or performing unnecessary operations. The operator can safely travel on the road by viewing the vehicle speed with the analog meter 2.

  Also, by using one analog meter 2, the analog meter 2 is installed in a size that is easy to see on the display panel, and the display is switched as described above so that the driver can easily and reliably When the display format of the display panel 1 changes, the display on the liquid crystal panel 3 is displayed with a predetermined time delay with respect to the display on the analog meter 2, so that the analog meter 2 is displayed. And the display on the liquid crystal panel 3 can be displayed in synchronization.

  Further, when the display speed of the analog meter 2 is long and the engine speed is long, the indicator 6 is not lit to prevent the operator from being irritated, and the luminescence time is greatly reduced, thereby reducing costs and saving energy. Can also be achieved.

  In the case of the vehicle speed display, the indicator 6 is caused to emit light so that the operator can recognize that it is the vehicle speed display, and misrecognition of the content displayed by the pointer 4 can be prevented. Since the color is displayed in the same color, the operator can naturally recognize that it is a vehicle speed display, and prevent misrecognition of the display contents.

The front view seen from the dial side around a display panel. The block diagram showing control of a working vehicle. The front view seen from the dial side in the working state of a display panel. The front view seen from the dial side in the driving | running | working state of a display panel. (A) The flowchart which shows control of a display panel. (B) A flowchart showing display control of the display panel. The side view of the tractor which is a working vehicle. The top view of a driving part.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Display panel 2 Analog type meter 4 Pointer 5 Scale 5a Scale 5a which shows engine speed Scale which shows vehicle speed 6 Light emission display part (indicator)
8,33 Automatic switching means (collective switch, controller II)
DESCRIPTION OF SYMBOLS 10 Working vehicle 13 Airframe 17 Driver's seat 30 Control means (controller I)
31, 32 Display switching means (controller IV, controller V)

Claims (1)

The driver's seat forward, e Bei a display panel having a face comprising at least the scale, an analog meter comprising a guide to indicate the value at that the dial, an indicator which is provided to be turned on by light-traveling vehicle body In a working vehicle provided with a three-point link mechanism to which a work machine can be attached at the rear end ,
Control means for calculating and outputting the engine speed and vehicle speed;
Automatic switching means for collectively activating or disabling a plurality of automatic controls for automatically controlling a work machine or a vehicle in a working state;
When the automatic switching means is in an operating state, the analog meter displays the engine speed from the control means and stops the indicator light emission. When the automatic switching means is in an invalid state, the analog meter Display switching means for displaying the vehicle speed from the control means on the expression meter and switching so that the indicator emits light ,
The analog meter is in the switching by the display switching means, and the dial scale is left as it is, and the movement of the pointer is switched.
A working vehicle characterized by that.

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