JP6387556B2 - Tractor - Google Patents

Description

The present invention relates to a tractor . In detail, it is related with the tractor provided with the display apparatus.

  2. Description of the Related Art Conventionally, a work vehicle such as a tractor is known in which a display device is provided on a meter panel including meters such as an engine tachometer and an indicator for displaying operation information of a work implement. . Information such as the vehicle speed and the rotational speed of the PTO shaft is displayed on the display device. For example, as described in Patent Document 1.

  The work vehicle described in Patent Literature 1 is provided with a rectangular display device below the meter panel, and displays information that is not displayed by the indicator on the meter panel. That is, the work vehicle provides more information to the driver by displaying detailed character information that cannot be displayed by the indicator on the display device. However, there is a possibility that important information such as abnormality information may be missed when the operator watches only one of the indicator and the display device.

JP 2006-342840 A

The present invention has been made in view of the above circumstances, and an object thereof is to provide a tractor capable of providing detailed information while reliably transmitting important information to a driver.

That is, in the present invention, an indicator for displaying the tractor operation information and abnormal operation information of each part of the tractor and a display device are provided on the meter panel, and the tractor operation information and the operation information of each part of the tractor are provided. Predetermined information is displayed on both the display device and the indicator, and is a tractor configured to be able to switch the predetermined information displayed on the display device to other information, and a PTO output shaft that is an external output shaft; A PTO switch for switching ON / OFF of power transmission of the PTO output shaft, and a reverser lever for switching forward, reverse, and neutral of the traveling power transmission device, and the PTO switch is ON when the tractor is started An operation message prompting the PTO switch to be turned off is displayed on the screen of the display device, and the PTO switch is displayed. Is OFF and the reverser lever is not in the neutral position, the display device displays information indicating that the reverser lever is in the neutral position, and the PTO switch is operated from ON to OFF. When the signal indicating that the reversing lever has been operated and the signal indicating that the reverser lever has been operated from the forward position or the reverse position to the neutral position is obtained, a status display screen is displayed on the display device .

  In the present invention, when priority is set for the predetermined information and there are a plurality of predetermined information to be displayed, all the indicators corresponding to the plurality of predetermined information are displayed, and the priority of the plurality of predetermined information is displayed. High predetermined information is displayed on the display device.

  In the present invention, the display switching means is provided, and when there are a plurality of predetermined information to be displayed, the predetermined information displayed on the display device can be switched to each other by the display switching means.

  As effects of the present invention, the following effects can be obtained.

  That is, in the present invention, the occurrence of an abnormal state is clearly displayed by a highly visible indicator, and the content of the abnormal state is specifically displayed by a display device. As a result, the detailed contents of important information can be reliably transmitted to the operator.

  In the present invention, more important information is displayed on the display device without being hidden by other information. As a result, the detailed contents of important information can be reliably transmitted to the operator.

  In the present invention, information desired by the operator is selectively displayed on the display device. As a result, the detailed contents of important information can be reliably transmitted to the operator.

The figure which shows the structure of one Embodiment of the tractor which concerns on this invention. The figure which shows the power transmission system of the tractor which concerns on this invention. The figure which shows the driver's seat of the tractor which concerns on this invention, and its periphery. The figure which shows the instrument panel of the tractor which concerns on this invention. The perspective view which shows the shape of the meter panel of the tractor which concerns on this invention. The figure which shows the display structure of the meter panel of the tractor which concerns on this invention. Schematic which shows the control structure of the tractor which concerns on this invention. (A) The figure which shows the display mode of a meter panel in case the PTO switch is an ON state at the time of start-up in the tractor which concerns on this invention. (B) The figure which shows the display mode of a meter panel in case a reverser is also in a non-neutral state. (A) The figure which shows the hour meter screen displayed on the meter panel of the tractor which concerns on this invention (b) The figure which shows a setting value display screen similarly (c) The figure which also shows an average fuel consumption and driveable time screen (d) The figure which shows a maintenance setting screen. (A) The figure which shows the display mode of the meter panel during driving | operation of the tractor which concerns on this invention (b) The figure which shows the display mode of the meter panel which displays an operation message during driving | operation of the tractor which concerns on this invention. The figure which shows the flowchart showing the control aspect of the meter panel which displays an operation message at the time of starting of the tractor which concerns on this invention. The figure which shows the flowchart showing the control aspect of the meter panel which displays a status display screen at the time of starting of the tractor which concerns on this invention. (A) The figure which showed the display mode of the meter panel in the case of displaying warning information in the tractor which concerns on this invention (b) The case where other information was displayed after warning information was displayed in the tractor which concerns on this invention The figure which shows the display mode of the meter panel of. (A) The figure which showed the display mode of the meter panel in case there exist several warning information in the tractor which concerns on this invention (b) One warning information was displayed among several warning information in the tractor which concerns on this invention The figure which shows the display mode of a meter panel when other warning information is displayed later.

  The technical idea of the present invention can be applied to any work vehicle. In the present application, description will be made using a tractor which is a typical work vehicle.

  First, the tractor 1 will be briefly described with reference to FIG.

  As shown in FIG. 1, the tractor 1 mainly includes a frame 2, an engine 3, a transmission 4, a front axle 5, and a rear axle 6. Further, the tractor 1 includes a cabin 7. The cabin 7 has a cockpit inside, and an accelerator pedal 43 and a shift lever 44 are arranged in addition to the driver's seat 40 (see FIG. 3).

  The frame 2 forms a skeleton at the front portion of the tractor 1. The frame 2 constitutes a chassis of the tractor 1 together with the transmission 4 and the rear axle 6. The engine 3 described below is supported by the frame 2.

  The engine 3 converts thermal energy obtained by burning fuel into kinetic energy. That is, the engine 3 generates rotational power by burning fuel. When the operator operates the accelerator pedal 43 (see FIG. 3), the driving state of the engine 3 is changed according to the operation. The engine 3 is provided with an exhaust purification device 3a. The exhaust purification device 3a oxidizes particulates, carbon monoxide, hydrocarbons, etc. contained in the exhaust.

  The transmission 4 transmits the rotational power of the engine 3 to the front axle 5 and the rear axle 6. The rotational power of the engine 3 is input to the transmission 4 via a coupling mechanism. The transmission 4 is provided with a continuously variable transmission 10 (see FIG. 2). When the driver operates the shift lever 44 (see FIG. 3), the continuously variable transmission 10 changes the operating state of the transmission 4 according to the operation.

  The front axle 5 transmits the rotational power of the engine 3 to the front tire 8. The rotational power of the engine 3 is input to the front axle 5 via the transmission 4. The front axle 5 is provided with a steering device (not shown). When the operator operates the handle 41 (see FIG. 3), the steering device changes the steering angle of the front tire 8 according to the operation.

  The rear axle 6 transmits the rotational power of the engine 3 to the rear tire 9. The rotational power of the engine 3 is input to the rear axle 6 via the transmission 4. The rear axle 6 is provided with a PTO device 30 (see FIG. 2). When the operator operates the PTO switch 65 (see FIG. 7), the PTO device 30 transmits rotational power to the working machine to be pulled according to the operation.

  Next, the power transmission system of the tractor 1 will be described with reference to FIG.

  As shown in FIG. 2, the power transmission system of the tractor 1 mainly includes an engine 3, a transmission 4, a front axle 5, and a rear axle 6.

  The transmission 4 includes a continuously variable transmission 10, a forward / reverse switching device 15, and an auxiliary transmission 23.

  The continuously variable transmission 10 can continuously change the ratio of the rotational speeds of the input shaft 11 and the output shaft 12. The input shaft 11 is connected to a hydraulic pump 10P that delivers high-pressure hydraulic oil. The output shaft 12 is connected to a hydraulic motor 10M that rotates by receiving high-pressure hydraulic oil. A forward drive gear 13 and a reverse drive gear 14 are attached to the output shaft 12.

  In the continuously variable transmission 10, the rotational speed of the output shaft 12 is changed by changing the operating state of the engine 3. More specifically, in the continuously variable transmission 10, the rotational speed of the output shaft 12 is changed by changing the operating state of the engine 3 and changing the rotational speed of the input shaft 11. Therefore, the tractor 1 can freely change the traveling speed by operating the accelerator pedal 43.

  The forward / reverse switching device 15 can operate the forward clutch 16a and the reverse clutch 16b independently of each other. The forward clutch 16 a has a forward driven gear 17 that meshes with the forward drive gear 13. The forward clutch 16 a operates to transmit the rotational power of the output shaft 12 to the center shaft 19. The reverse clutch 16b has a reverse driven gear 18 that meshes with the reverse drive gear 14 via a reverse gear. The reverse clutch 16 b is operated to transmit the rotational power of the output shaft 12 to the center shaft 19. An ultra-low speed drive gear 20, a first speed drive gear 21, and a second speed drive gear 22 are attached to the center shaft 19.

  The auxiliary transmission 23 can operate the super-low speed clutch 24, the first speed clutch 25, and the second speed clutch 26 independently of each other. The ultra-low speed clutch 24 is operated to transmit the rotational power of the center shaft 19 to the counter shaft 27. The first speed clutch 25 is operated to transmit the rotational power of the center shaft 19 to the counter shaft 27. The second speed clutch 26 is operated to transmit the rotational power of the center shaft 19 to the counter shaft 27. A front drive gear 28 and a rear drive gear 29 are attached to the counter shaft 27.

  With such a structure, the rotational power of the counter shaft 27 is transmitted to the front tire 8 via the front axle 5. Further, the rotational power of the counter shaft 27 is transmitted to the front tire 8 through the rear axle 6.

  Hereinafter, the PTO device 30 included in the tractor 1 will be described.

  The tractor 1 includes a shaft (hereinafter referred to as “PTO shaft 39”) for inputting rotational power to the work machine. The tractor 1 also includes a clutch (hereinafter referred to as “PTO clutch 31”) that switches the PTO shaft 39 to a rotating state or a stopped state. Here, the PTO device 30 including the PTO shaft 39 and the PTO clutch 31 will be described.

  A center shaft 32 that is rotatably supported via a bearing is attached to the PTO clutch 31. A center gear 33 to which the rotational power of the engine 3 is transmitted is supported on the center shaft 32 via a bearing. The PTO clutch 31 connects the center shaft 32 and the center gear 33 by its operation. That is, the rotational power of the engine 3 is transmitted to the center shaft 32 via the center gear 33 and the PTO clutch 31. A drive shaft 34 is connected to the center shaft 32, and the rotational power of the engine 3 is transmitted.

  The drive shaft 34 is rotatably supported via a bearing. A drive gear 35 is attached to the drive shaft 34. The drive gear 35 meshes with the driven gear 38. The PTO device 30 includes a total of five drive gears 35.

  The driven gear 38 is attached to the driven shaft 36 via the electromagnetic clutch 37. The PTO device 30 includes a total of five driven gears 38. The driven shaft 36 is rotatably supported via a bearing. The electromagnetic clutch 37 connects the driven gear 38 and the driven shaft 36 by its operation. That is, the rotational power from the drive shaft 34 is transmitted to the driven shaft 36 via the driven gear 38 and the electromagnetic clutch 37. The electromagnetic clutch 37 operates when a PTO switch 65 (see FIG. 7) provided in the cockpit is turned on. A PTO shaft 39 is connected to the driven shaft 36, and rotational power from the drive shaft 34 is transmitted.

  With such a structure, the PTO device 30 transmits the rotational power of the engine 3 to the PTO shaft 39 in a state where the PTO clutch 31 is operated and the PTO switch 65 is turned on.

  Next, the cockpit of the tractor 1 will be described with reference to FIG.

  As shown in FIG. 3, the cabin 7 has a cockpit inside. In the cabin 7, a driver seat 40 is disposed substantially in the center. A handle 41 is disposed on the front side of the driver seat 40, and an instrument panel 42 is disposed on the front side thereof. Further, around the driver's seat 40, an operation tool such as an accelerator pedal 43, a shift lever 44, a brake pedal 45, a clutch pedal 46, a reverser lever 47, a key switch 48 (see FIG. 4) and a display 49 are arranged. .

  The cabin 7 (cockpit) operates the handle 41, the accelerator pedal 43, the shift lever 44, the handle 41, the brake pedal 45, the clutch pedal 46, the reverser lever 47, and the like while the operator is sitting on the driver's seat 40. 1 is configured to be steerable. In addition, a display 49 is disposed on the right front side of the driver seat 40 at a position where the operator can visually recognize and operate the driver seat 40 while sitting on the driver seat 40. In the present embodiment, the display 49 is arranged on the right side of the driver seat 40 so that the display screen faces the driver seat 40.

  Next, the meter panel 50 will be described with reference to FIGS. The meter panel 50 displays a part of information among the operation information of the tractor 1 and the abnormality information of each part of the tractor 1.

  As shown in FIG. 4, the meter panel 50 is provided on the instrument panel 41 on the front side of the driver seat 40. The meter panel 50 is disposed so as to face the driver's seat 40 and is disposed so as to be visible while the operator is sitting on the driver's seat 40.

  As shown in FIG. 5, the meter panel 50 includes a first display unit 51, a second display unit 58, and a third display unit 60. In the center of the first display portion 51, a second display portion 58 formed in a semicircular shape is arranged so as to overlap. In the center of the second display portion 58, a third display portion 60 formed in a semicircular shape is arranged so as to overlap. That is, the meter panel 50 is configured by laminating the first display unit 51, the second display unit 58, and the third display unit 60 in this order.

  As shown in FIG. 6, the meter panel 50 is provided with a fuel gauge 52, a water temperature gauge 55, a tractor indicator 53, a work implement indicator 56, a rotation speed meter 59 of the engine 3, a display device 61, and the like. The first display section 51 of the meter panel 50 is provided with a needle type fuel gauge 52, a needle type water temperature gauge 55, a tractor indicator 53, and a work implement indicator 56.

  A fuel gauge 52 is disposed on the left side of the first display section 51 of the meter panel 50. The fuel gauge 52 is rotatably supported near the center of the first display unit 51. On the left side of the fuel gauge 52, a tractor indicator 53 and a warning indicator 54 for displaying information on the tractor 1 are arranged. A water temperature meter 55 is arranged on the right side of the first display unit 51. The water temperature meter 55 is rotatably supported near the center of the first display unit 51. On the right side of the water temperature gauge 55, a working machine indicator 56 and a caution indicator 57 for displaying information on the working machine are arranged. The rotation support portions of the fuel gauge 52 and the water temperature gauge 55 are covered with the second display portion 58. That is, the first display unit 51 is configured such that the needle of the fuel gauge 52 and the needle of the water temperature gauge 55 move along the outer edge of the second display unit 58.

  The second display portion 58 of the meter panel 50 is provided with a needle type rotational speed meter 59. The tachometer 59 is rotatably supported at the center of the second display unit 58. The tachometer 59 is configured to indicate the scale of the arc portion of the second display portion 58. The rotation support portion of the tachometer 59 is covered by the third display unit 60. That is, the second display unit 58 is configured such that the needle of the tachometer 59 moves along the outer edge of the third display unit 60 and points to the scale of the arc portion of the second display unit 58.

  A display device 61 is provided in the third display section 60 of the meter panel 50. The display device 61 is disposed so as to be surrounded by the rotation speed meter 59 of the engine 3. The display device 61 is arranged such that a display screen 62 constituted by a liquid crystal screen or the like faces the driver seat. The display screen 62 displays the vehicle speed of the tractor 1 and the rotational speed of the engine 3, various set values, various detailed information, and abnormality information. The display device 61 is configured so that the content displayed on the display screen 62 is displayed separately on the upper screen, the middle screen, and the lower screen.

  The meter panel 50 includes a fuel gauge 52, a tractor indicator 53, a warning indicator 54, a water temperature gauge 55, a work implement indicator 56, a caution indicator 57, a tachometer 59, a display device 61, and a meter panel controller 64. Is provided. The meter panel control device 64 is provided at a position where it cannot be visually recognized from the outside. The meter panel control device 64 is connected to the fuel gauge 52, the tractor indicator 53, the warning indicator 54, the water temperature gauge 55, the work implement indicator 56, the caution indicator 57, the tachometer 59, and the display device 61. The tractor indicator 53, the warning indicator 54, the water temperature meter 55, the work implement indicator 56, the caution indicator 57, the tachometer 59, and the display device 61 can be controlled.

  Based on signals from operating tools such as the handle 41, the accelerator pedal 43, the shift lever 44, the brake pedal 45, the clutch pedal 46, the reverser lever 47, the key switch 48, and the PTO switch 65, the control device 63 controls the engine 3, transmission 4 and the like, and various information is displayed on the display 49 and the meter panel 50. The control device 63 stores various programs and data for controlling the engine 3, the transmission 4, and the like. The control device 63 may have a configuration in which a CPU, a ROM, a RAM, an HDD, and the like are connected by a bus, or may be configured by a one-chip LSI or the like.

  Here, the tractor 1 is a controller area network (CAN) that is an information network in which the engine 3, the drive system, various operation devices, and the like are organically connected around the control device 63 so that the maximum performance can be exhibited. ) Is configured. In the tractor 1, the control device 63 grasps in detail the state of the engine 3, the transmission 4, and the like by CAN, and comprehensively controls the engine 3, the transmission 4, and the like based on inputs from a control panel and a display 49 (not shown).

  As shown in FIG. 7, the control device 63 includes operations such as a handle 41, an accelerator pedal 43, a shift lever 44, a brake pedal 45, a clutch pedal 46, a reverser lever 47, a key switch, a PTO switch 65, and a connection release lever 66. It is electrically connected to the tool, and a signal from each operation tool can be acquired. Further, the control device 63 is connected to the meter panel control device 64, and is part of the rotational speed of the engine 3, the remaining fuel amount, the water temperature, the operation information of the work vehicle, and the abnormality information of each part of the work vehicle by CAN. Can be sent to the meter panel controller 64.

  Next, the operation mode of the meter panel 50 of the tractor 1 according to an embodiment of the present invention will be described with reference to FIGS. 2, 4, and 6 to 14.

  First, a control mode for displaying an operation message on the display device 61 in the meter panel 50 will be described. The operation message is a message that prompts the operator to perform a predetermined operation based on the state of the tractor 1.

  When the key switch 48 that is the power switch of the tractor 1 shown in FIG. 4 is turned on, the control device 63 starts supplying power to the meter panel 50. As shown in FIG. 7, the control device 63 determines whether or not the PTO switch 65 is ON and whether or not the reverser lever 47 is in the R position, and transmits the result to the meter panel control device 64. .

  As shown in FIG. 8A, when the meter panel control device 64 obtains a signal indicating that the PTO switch 65 is ON from the control device 63, the meter panel control device 64 prompts the PTO switch 65 to be turned OFF at the lower stage of the screen of the display device 61. The PTO restriction screen 62A displaying the operation message is displayed. In the PTO restriction screen 62A, in addition to the operation message displayed on the lower screen of the display device 61, “N” is displayed on the upper screen of the display screen 62 when the reverser lever 47 is at the N position. The vehicle speed of the tractor 1 and the rotational speed of the engine 3 are displayed. That is, when the PTO restriction screen 62A does not satisfy the predetermined condition that the PTO switch 65 is OFF, the state of the reverser lever 47 (forward / reverse switching device 15 of the transmission 4), the vehicle speed of the tractor 1 and the engine Further, information indicating that the PTO switch 65 is turned off is further displayed on the display device 61 displaying the rotational speed 3.

  Further, as shown in FIG. 8B, when the meter panel control device 64 acquires a signal that the reverser lever 47 is in the F position or the R position, the reverser lever 47 is placed in the N position at the lower stage of the screen of the display device 61. A reverser restriction screen 62B displaying an operation message that prompts the user to display is displayed. On the PTO restriction screen 62B, in addition to the operation message displayed on the lower screen of the display device 61, the upper screen of the display screen 62 is displayed blank, and the vehicle speed of the tractor 1 and the rotation speed of the engine 3 are displayed in the middle screen. It is displayed. That is, when the reverser lever 47 that is a predetermined condition does not satisfy the state of the N position, the reverser lever 47 is displayed on the display device that displays the vehicle speed of the tractor 1 and the rotational speed of the engine 3. Is further displayed to indicate that the position is N.

When the instrument panel control device 64 obtains a signal from the control device 63 that the PTO switch 65 has been operated from ON to OFF, and a signal that the reverse lever 47 has been operated from the F position or the R position to the N position, Any one of status display screens 62C, 62D, 62E, and 62F is displayed on the display device 61 (see FIG. 9).

  As shown in FIG. 9, the state display screens are an hour meter screen 62C, a set value display screen 62D, an average fuel consumption / operation possible time screen 62E, and a maintenance setting screen 62F. On the status display screen, as a common display, “N” is displayed when the reverser lever 47 is at the N position as the reverser lever position display 62 a at the upper stage of the screen, and the vehicle speed of the tractor 1 is displayed as the speed display 62 b of the tractor 1 at the middle stage of the screen. And the rotation speed of the engine 3 are displayed. In the lower part of the status display screen, any one of an hour meter display 62c, a set value display 62d, an average fuel consumption / operation possible time display 62e, and a maintenance setting display 62f is selectively displayed.

  As shown in FIG. 9A, the hour meter screen 62 </ b> C is a screen that displays the operating time of the tractor 1. The hour meter screen 62C has an hour meter display 62c at the lower part of the screen of the display device 61, the load factor of the engine 3, the hour meter which is the cumulative operation time of the tractor 1, and the trip meter which is the cumulative operation time from an arbitrarily set time. Is displayed.

  As shown in FIG. 9B, the set value display screen 62D is a screen for limiting the maximum engine speed of the tractor 1. The set value display screen 62D is the maximum of the engine 3 in the A mode applied when the work implement is mainly used as the set value display 62d in the lower part of the display device 61 and the B mode applied when the work implement is not used. The rotation speed and maximum vehicle speed are displayed simultaneously. On the set value display screen 62D, the maximum rotation speed of each mode can be changed by a signal from an operating tool (not shown). Similarly, the set value display screen 62D can be switched to a screen for limiting the maximum rotational speed of the PTO shaft 39 between the A mode and the B mode. On the screen for limiting the maximum rotational speed of the PTO shaft 39, the rotational speed of the PTO shaft 39 from the first speed to the fourth speed is displayed by changing the maximum rotational speed of the PTO shaft 39 in each mode.

  As shown in FIG. 9C, the average fuel consumption / operation possible time screen 62E is a screen for limiting the maximum engine speed of the tractor 1. The average fuel consumption / drivable time screen 62E is displayed as an average fuel consumption / drivable time display 62e in the lower part of the display device 61 from the load factor of the engine 3, the average fuel consumption of the tractor 1, and the drivable time or the set time. An upward arrow indicating that the vehicle can be operated is displayed.

  As shown in FIG. 9D, the maintenance setting screen 62F is a screen for setting various maintenance times of the tractor 1. In the maintenance setting screen, the fact that the maintenance setting mode is in the maintenance setting display 62f is displayed in the lower part of the screen of the display device 61. The maintenance setting screen 62F is a screen for displaying and setting the replacement time of consumables that require periodic replacement, such as engine oil, mission oil, front axle oil, and engine oil element. In the maintenance setting screen 62F, when a consumable item is replaced, the replacement time can be reset by inputting the fact by a signal from an operation tool (not shown). When it is time to replace the consumables (for example, engine oil), the meter panel control device 64 displays text information “engine oil replacement” and maintenance information as a maintenance message at the bottom of the screen of the display device 61 when the key switch 48 is turned on. The symbol mark is displayed.

  When the key switch 48 (see FIG. 7) is turned on, the meter panel control device 64 displays the type of state display screen that was displayed when the key switch 48 was turned off most recently (hereinafter simply referred to as “previous display screen”). The state display screen to be displayed is determined based on “ Specifically, the meter panel control device 64 displays the hour meter screen 62C when the previous display screen is not stored, and displays the same screen as the previous display screen when the previous display screen is not the maintenance setting screen 62F. To do. The meter panel control device 64 displays the hour meter screen 62C when the rotation speed of the engine 3 is equal to or higher than the reference value on the maintenance setting screen 62F, and the previous display screen is the maintenance setting screen 62F and the rotation speed is When it is less than the reference value, the maintenance setting screen 62F is displayed. The meter panel control device 64 is configured to be able to switch the status display screen to an arbitrary status display screen when receiving a switching signal from a changeover switch (not shown).

  As shown in FIG. 10, the meter panel control device 64 is connected to the two-speed clutch 26 (see FIG. 2) of the auxiliary transmission 23 that performs high-speed running from the control device 63 during various operations by the tractor 1. When the signal is acquired and the signal indicating that the connection release lever 66 (see FIG. 7) of the brake pedal 45 is not locked is acquired, the display of the display device 61 is displayed from the hour meter screen 62C shown in FIG. The screen is switched to the connection release restriction screen 62G that displays an operation message for urging the lock of the connection release lever 66 shown in FIG. 10 (b). In this way, the meter panel control device 64 is equipped with a signal (reverser lever 47, PTO switch 65, connection release lever 66, seat belt attachment, etc.) from the control device 63 during various operations by the tractor 1. State, parking brake state, and the like) are configured to switch to a screen that displays an operation message corresponding to the display device 61.

  Hereinafter, the control mode for displaying the operation message display and the status display screen of the display device 61 on the meter panel 50 of the tractor 1 according to the present invention will be specifically described with reference to FIG. In the present embodiment, it is assumed that the control device 63 has acquired an ON signal of the key switch 48 by the operator.

  As shown in FIG. 11, in step S110, when the power is supplied from the control device 63, the meter panel control device 64 displays a start screen on the display device 61, and shifts the step to step S120.

  In step S120, the meter panel control device 64 acquires signals about the operation position of the PTO switch 65 and the operation position of the reverser lever 47 from the control device 63, and shifts the step to step S130.

  In step S <b> 130, the meter panel control device 64 determines whether the operation position of the PTO switch 65 is the ON position from the acquired signal regarding the operation position of the PTO switch 65. As a result, when it is determined that the operation position of the PTO switch 65 is the ON position, the meter panel control device 64 shifts the step to step S140. On the other hand, when it is determined that the operation position of the PTO switch 65 is not the ON position, that is, when it is determined that the operation position of the PTO switch 65 is the OFF position, the meter panel control device 64 shifts the step to Step S160.

  In step S140, the meter panel control device 64 displays the PTO restriction screen 62A on the display device 61, and shifts the step to step S150.

  In step S150, the meter panel control device 64 determines whether or not a signal indicating that the operation position of the PTO switch 65 is the OFF position has been acquired from the control device 63. As a result, when it is determined from the control device 63 that the signal indicating that the operation position of the PTO switch 65 is the OFF position has been acquired, the meter panel control device 64 shifts the step to step S160. On the other hand, when it determines with the signal which the operation position of the PTO switch 65 is an OFF position not acquiring from the control apparatus 63, the meter panel control apparatus 64 transfers a step to step S140.

  In step S160, the meter panel control device 64 determines whether or not the reverser lever 47 is in the F position or the R position from the acquired signal regarding the operation position of the reverser lever 47. As a result, when it is determined that the operation position of the reverser lever 47 is the F position or the R position, the meter panel control device 64 shifts the step to step S170. On the other hand, if it is determined that the operation position of the reverser lever 47 is not the F position or the R position, that is, if the operation position of the reverser lever 47 is determined to be the N position, the meter panel control device 64 proceeds to step S190. Let

  In step S170, the meter panel control device 64 displays the reverser restriction screen 62B on the display device 61, and shifts the step to step S180.

  In step S180, the meter panel control device 64 determines whether or not a signal indicating that the operation position of the reverser lever 47 is the N position has been acquired from the control device 63. As a result, when it is determined from the control device 63 that the signal indicating that the operation position of the reverser lever 47 is the N position has been acquired from the control device 63, the meter panel control device 64 shifts the step to step S200. On the other hand, when it is determined from the control device 63 that a signal indicating that the operation position of the reverser lever 47 is the N position has not been acquired from the control device 63, that is, the operation position of the reverser lever 47 is the F position or the R position. If it is determined, the meter panel control device 64 shifts the step to step S170.

  In step S200, the meter panel control device 64 starts state display screen control A, and shifts the step to step S210 (see FIG. 11).

  As shown in FIG. 11, in step S210, the meter panel control device 64 determines whether or not the previous display screen is stored. As a result, when it is determined that the previous display screen is stored, the meter panel control device 64 shifts the step to step S220. On the other hand, when it determines with not having memorize | stored the last display screen, the meter panel control apparatus 64 makes a step transfer to step S240.

  In step S220, the meter panel control device 64 determines whether or not the previous display screen is the maintenance setting screen 62F. As a result, when it is determined that the previous display screen is the maintenance setting screen 62F, the meter panel control device 64 shifts the step to step S230. On the other hand, when it determines with the last display screen not being the maintenance setting screen 62F, the meter panel control apparatus 64 makes a step transfer to step S440.

  In step S230, the meter panel control device 64 determines whether or not the rotational speed of the engine 3 when the key switch 48 is turned OFF most recently is equal to or higher than a reference value. As a result, when it is determined that the rotation speed of the engine 3 when the key switch 48 is most recently turned off is equal to or higher than the reference value, the meter panel control device 64 shifts the step to step S240. On the other hand, when it is determined that the rotation speed of the engine 3 when the key switch 48 is most recently turned off is not equal to or higher than the reference value, that is, the rotation speed of the engine 3 when the key switch 48 is most recently turned off is the reference. If it is less than the value, the meter panel control device 64 shifts the step to step S340.

  In step S240, the meter panel control device 64 displays the hour meter screen 62C, ends the state display screen control A, and ends the step.

  In step S340, the meter panel control device 64 displays the maintenance setting screen 62F, ends the status display screen control A, and ends the step.

  In step S440, the meter panel control device 64 displays the same state constant screen as the previous display screen, ends the state display screen control A, and ends the step.

  With this configuration, the tractor 1 is started in a predetermined state regardless of the operation state when the tractor 1 is stopped most recently. On the other hand, the display content is determined based on the state display screen that was displayed when the display screen was most recently stopped. Thereby, the behavior at the time of starting of the tractor 1 can be stabilized, and an operator's operating environment can be improved.

  Next, a control mode for displaying a warning message on the display device 61 in the meter panel 50 will be described. The warning message is a message that alerts the operator regarding the state of the tractor 1 or requests an immediate response due to the occurrence of an abnormal state. The warning message is displayed on the meter panel 50 by at least one of the warning indicator 54, the caution indicator 57, and the display device 61.

  As shown in FIG. 6, the warning indicator 54 is disposed on the right side of the display device 61 in the meter panel 50. The warning indicator 54 is configured such that a symbol mark in which “!” Is surrounded by a triangular frame is lit in red. The caution indicator 57 is disposed on the left side of the display device 61 in the meter panel 50. The attention indicator 57 is configured such that a symbol mark in which “!” Is surrounded by a diamond-shaped frame lights up in yellow.

  In the warning message by the display device 61, character information indicating the content of the warning and a symbol mark corresponding to the content of the warning are displayed in the lower part of the screen of the display device 61. The warning message by the display device 61 is displayed blinking together with an indicator corresponding to the content of the warning. A priority for display is set for the warning. Warnings for abnormal conditions that need to be dealt with immediately have a high priority. That is, a warning message with a high priority is preferentially displayed on the display device 61. Accordingly, when a plurality of abnormal conditions occur, the meter panel control device 64 causes the display device 61 to display a warning message having a high priority.

  When the meter panel control device 64 obtains a predetermined warning signal from the control device 63, the indicator corresponding to the warning signal among the warning indicator 54 and the caution indicator 57 blinks, and the content of the warning is displayed as a warning message on the display device 61. The character information indicating the symbol and the symbol mark are displayed. That is, the meter panel control device 64 displays a warning about predetermined abnormality information on both the display device 61 and the indicator corresponding to the warning signal among the warning indicator 54 or the caution indicator 57. In addition, when the meter panel control device 64 acquires a predetermined warning signal from the control device 63 even at the time of starting, the indicator corresponding to the warning signal among the warning indicator 54 and the caution indicator 57 blinks and the display device 61. The character information indicating the content of the warning and the symbol mark are displayed as a warning message.

  The meter panel control device 64 switches a warning message displayed on the display device 61 to an arbitrary state display screen when receiving a switching signal from a changeover switch which is a display switching means (not shown). On the other hand, the meter panel control device 64 maintains a warning display by blinking of the warning indicator 54 and the caution indicator 57 even when a switching signal from a changeover switch (not shown) is received. In addition, when the meter panel control device 64 acquires a predetermined warning signal from the control device 63 even at the time of starting, the indicator corresponding to the warning signal among the warning indicator 54 and the caution indicator 57 blinks and the display device 61. The character information indicating the content of the warning and the symbol mark are displayed as a warning message.

  For example, as shown in FIG. 13A, when the meter panel control device 64 obtains a signal indicating that the remaining amount of fuel is low from the control device 63, the meter panel 50 blinks the caution indicator 57 of the meter panel 50 and the display device 61. The screen is switched to a fuel caution screen 62H displaying a warning message composed of a symbol mark about fuel and character information “fuel supply” at the bottom of the screen.

  As shown in FIG. 13 (b), when the meter panel control device 64 receives a switching signal due to the operation of a changeover switch (not shown), the meter panel control device 64 is displayed on the display device 61 while maintaining the blinking display of the caution indicator 57. The fuel warning screen 62H is switched to an arbitrary state display screen (hour meter screen 62C in the present embodiment). Further, when the meter panel control device 64 acquires a signal indicating that the remaining fuel amount is sufficient from the control device 63, the meter panel control device 64 turns off the caution indicator 57 of the meter panel 50 and displays a warning message displayed on the display device 61 in a predetermined manner. Switch to the status display screen (for example, the hour meter screen 62C).

  Further, when the meter panel control device 64 acquires a plurality of warning signals from the control device 63, the warning indicator 54 and the caution indicator 57 corresponding to the warning signal blink, and the content of the warning having a high priority is displayed on the display device 61. A warning message indicating is displayed. When the meter panel control device 64 receives a switching signal from a changeover switch (not shown), the meter panel control device 64 switches the warning message displayed on the display device 61 to a warning message indicating the content of the next highest priority warning. As described above, each time the meter panel control device 64 receives a switching signal from a changeover switch (not shown), the meter panel control device 64 causes the display device 61 to switch and display the warning message according to the priority of warning.

  For example, as shown in FIG. 14 (a), the meter panel control device 64 has a charging system abnormality higher in priority than the signal from the control device 63 that the fuel level is low and the signal that the fuel level is low. When the signal is acquired, the caution indicator 57 and the warning indicator 54 of the meter panel 50 are blinked, and the display is switched to the charging warning screen 62I that displays a warning message of a high-priority charging system abnormality in the lower part of the screen of the display device 61.

  As shown in FIG. 14B, when the meter panel control device 64 receives a switching signal due to the operation of a not-shown change-over switch, the meter panel control device 64 displays the caution indicator 57 and the warning indicator 54 while maintaining the blinking display. The charging warning screen 62I displayed on the device 61 is switched to the fuel warning screen 62H. When the meter panel control device 64 further receives the switching signal, the fuel warning screen 62H displayed on the display device 61 is switched to the charging warning screen 62I while the blinking display of the caution indicator 57 and the warning indicator 54 is maintained.

  When the meter panel control device 64 obtains a signal indicating that the remaining amount of fuel is sufficient from the control device 63, the meter panel control device 64 turns off the caution indicator 57 of the meter panel 50 and continuously displays the charging warning screen 62I on the display device 61. Let On the other hand, when the charging system abnormality signal from the control device 63 stops, the meter panel control device 64 turns off the warning indicator 54 of the meter panel 50 and causes the display device 61 to display the fuel caution screen 62H.

  With this configuration, since at least one of the warning indicator 57 and the warning indicator 54 blinks and a message is displayed on the display device 61, the occurrence of an abnormal state is clearly indicated by a highly visible indicator. The contents of the abnormal state are specifically displayed by the display device 61 which is displayed and arranged at substantially the center of the meter panel 50. Further, since an abnormal state is displayed in accordance with the priority order of warnings, more important information is not hidden by other information. Further, information desired by the operator is selectively displayed on the display device 61 by the operation of the operator. As a result, the detailed contents of important information can be reliably transmitted to the operator.

1 Tractor 50 Meter panel 53 Tractor indicator 56 Work implement indicator 61 Display device

Claims (3)

An indicator for displaying operation information of the tractor and abnormal operation information of each part of the tractor and a display device are provided on the meter panel, and predetermined information out of the operation information of the tractor and the operation information of each part of the tractor is provided with the display device A tractor configured to be displayed on both the indicator and configured to be able to switch the predetermined information displayed on the display device to other information,
A PTO output shaft that is an external output shaft, a PTO switch that switches ON / OFF of power transmission of the PTO output shaft, and a reverser lever that switches forward, reverse, and neutral of the traveling power transmission device,
When the tractor is started, if the PTO switch is ON, an operation message prompting the PTO switch to be turned OFF is displayed on the screen of the display device.
When the PTO switch is OFF and the reverser lever does not satisfy the neutral position, information indicating that the reverser lever is in the neutral position is displayed on the screen of the display device.
When the signal indicating that the PTO switch has been operated from ON to OFF and the signal indicating that the reverser lever has been operated from the forward position or the reverse position to the neutral position, a status display screen is displayed on the display device. Make
Tractor . When priority is set for the predetermined information and there are a plurality of predetermined information to be displayed, all the indicators corresponding to the plurality of predetermined information are displayed, and among the plurality of predetermined information, the predetermined information having a higher priority is The tractor according to claim 1 displayed on a display device. 3. The tractor according to claim 1, further comprising a display switching unit configured to switch the predetermined information displayed on the display device to each other by the display switching unit when there is a plurality of predetermined information to be displayed. .

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