JP4031700B2 - Agricultural tractor - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
  The present invention relates to an agricultural tactor formed by connecting a working device such as a rotary tiller to a rear portion of a machine body so as to be movable up and down.
[0002]
[Prior art]
  In recent years, in agricultural tactors, a position control system that raises and lowers the working device connected to the rear part of the machine to a height corresponding to the operating position of the raising and lowering lever, and automatic tilling that controls the raising and lowering so that the working device is stably maintained at the set working depth. In addition to a depth control system and a rolling control system that stably maintains the left and right tilt posture with the work device set, there are operating tools that artificially select and adjust each function of the automatic tilling control system and rolling control system. Have been developed and put to practical use.
[0003]
  The highly functional agricultural tactors as described above can perform fine-tuned work adapted to the working conditions by selecting and adjusting the specifications of the control system, but on the other hand, it is difficult to select and adjust functions. For users who are not familiar with the functions, there is a risk of erroneous operations.
[0004]
  Therefore, in order to make it possible to easily set a standard work form with an easy-to-understand simple operation, so that even a user who is not familiar with the function can perform the work without erroneous operation, A standard automatic depth control that includes a single batch switch that turns on and off the rolling control system at the same time, and that controls the lifting and lowering of the work equipment based on the actual tilling depth detection by turning on the batch switch. A configuration in which a mode and a standard rolling control mode in which the target tilt angle is horizontal is set and developed (see Patent Document 1).
[Patent Document 1]
  JP 2000-262108 A
[0005]
[Problems to be solved by the invention]
  By introducing the collective switch as described above, anyone can easily perform standard control on the height and posture of the work equipment. However, in recent years, various types of traveling systems such as front wheel acceleration control during turning have also been introduced. Since these controls have been introduced, it is necessary to separately turn on / off these controls, which may be difficult to handle for users who are not familiar with the functions.
[0006]
  The present invention has been made paying attention to such points, and enables easy setting of a standard work form with an easy-to-understand simple operation, so that even a user who is not familiar with the function can work without erroneous operation. The purpose is to be able to perform.
[0007]
[Means for Solving the Problems]
  [Configuration, operation and effect of the invention according to claim 1]
[0008]
  The invention according to claim 1 is a collective switch that switches both the control function related to the work position and orientation of the work device mounted on the tractor main unit and the control function of the traveling system of the tractor main unit to an on state or an off state by a collective operation. WithAs a control element of the control function related to the work position and posture of the work device, a tilling control system that maintains the ground work depth of the work device at a set depth, and rolling control that maintains the left and right tilt angle of the work device at a set angle. System, an auto-up control system that raises the working device when the front wheel of the tractor main unit is steered beyond a set angle, and a backup control system that raises the working device when the tractor main unit is in a reverse drive state. In addition, as a control element of the control function of the traveling system, a front wheel transmission control system that increases the front wheels in conjunction with the front wheel steering more than the set angle is provided, and the tilling depth control system, the rolling control system, and the front wheel transmission control system An individual operation tool for individually selecting functions, and an individual operation tool for individually switching on and off the functions of the auto-up control system and the backup control system,The batch switchIs switched to the on state, the tilling depth control system, the rolling control system and the front wheel speed change control system areOperates in a preset standard function state or standard sensitivity stateEither in the ON state, the batch ON state in which the functions of the auto-up control system and the backup control system are turned ON, and all the control elements of the control function are switched to the ON state by the operation of the batch switch. When one control element is selectively changed or switched to an off state by an individual operation tool corresponding to the control element, the control element Among the control functions, the function of only the control element corresponding to the operated individual operation tool is changed and the collective ON state by the collective switch is canceled, and the function of each control element is selected by the individual operation tool. When the engine is stopped and the engine is started again and the control device is started, the function of each control element is resumed in the function selection state when the engine is stopped.It is characterized by that.
[0009]
  According to the above configuration, by turning on the collective switch, both the control function related to the work position and orientation of the work device and the control function of the traveling system of the tractor machine can be switched on. Can be carried out. A user who is well aware of the function can select or adjust the control function to perform work running with each control having a desired specification. Further, when the collective switch is turned off, each control necessary for the work travel is turned off, and a state suitable for road travel is obtained.
  The control elements that can be activated by turning on the collective switch operate in the standard function state or the standard sensitivity state.
[0010]
  According to the above configuration, when the collective switch is turned on, the tilling depth control and the rolling control are executed, and the front wheel shift control in conjunction with the change in the body direction at the time of dredging is enabled.
[0011]
  By turning on the batch switch with the above configuration, plowing depth control and rolling control are executed, and rotary plowing can be performed satisfactorily, and auto up control when turning the aircraft at the shoreline Thus, a state in which the work device can be automatically lifted by the above-mentioned and the work device can be automatically lifted by the backup control at the time of switchback at the shore is displayed.
[0012]
  According to the above configuration, even a control element that can be turned on at once can be turned off arbitrarily as needed, and work traveling with suitable specifications according to the field conditions and the like can be performed.
[0013]
  According to the above configuration, when the engine is stopped and the work drive is interrupted, the next time the engine is started, the work drive can be resumed with the same control specifications as before the interruption, and there is no need to re-set the control specifications. Effective in terms of handling.
[0014]
  Therefore, according to the first aspect of the invention, it is possible to obtain a state in which even unskilled users and elderly users who are not familiar with the function can perform control suitable for work travel by simply turning on the collective switch. It is possible to switch to a state suitable for road driving by operation, and it is possible to perform work driving and road driving without any erroneous operation by simplifying the operation.
  Even an unskilled user or an elderly user who is not familiar with the functions can satisfactorily perform work with standard control simply by turning on the collective switch.
[0015]
  Therefore,Claim 1According to the invention according to the present invention, it is possible to easily perform rotary tilling at a predetermined plowing depth and to easily and quickly change the direction of the body at the edge by turning on the collective switch. can do.
[0016]
  Therefore,Claim 1According to the invention, it is possible to select and set many control elements at once.it can.
[0017]
[0018]
[0019]
[0020]
[0021]
[0022]
[0023]
[0024]
[0025]
[0026]
[0027]
[0028]
[0029]
[0030]
  [Claim 2Configuration, operation and effect of the invention
[0031]
  Claim 2The invention according toClaim 1In the invention, an individual operation tool for individually adjusting the function or sensitivity of the control element of the control function switched to the ON state by the collective switch is provided.
[0032]
  According to the above configuration, even with a control element that can be turned on at once, its function and sensitivity can be arbitrarily selected and adjusted as necessary, and work traveling with suitable specifications according to field conditions and the like can be performed. .
[0033]
  [Claim 3Configuration, operation and effect of the invention
[0034]
  Claim 3The invention according to claim1 or 2In the invention, the display means for displaying the fact that the collective switch is turned on by the collective switch, and when the individual operation tool is operated after the collective switch is turned on by the collective switch, It is configured to display that the collective operation has been canceled.
[0035]
  According to the above configuration, it is possible to easily recognize from a display on the display means whether a predetermined control element is in a state of being collectively turned on or in a state of being released of a collective operation, which is effective in avoiding an erroneous operation.
[0036]
[0037]
[0038]
[0039]
  [Claim 4Configuration, operation and effect of the invention
[0040]
  Claim 4The invention according toClaims 1-3In the invention according to any one of the above, the collective switch is arranged in the vicinity of a front panel provided in front of a driving unit in the tractor main unit.
[0041]
  According to the above configuration, the front of the driving unit is easily visible and is a position that can be operated without greatly moving the body, and the collective switch provided here is easy to handle.
[0042]
  [Claim 5Configuration, operation and effect of the invention
[0043]
  Claim 5The invention according to claim1-4In the invention according to any one of the above, the operating device system operating tool is arranged on one side of the driver seat and the traveling system operating tool is installed on the other side. .
[0044]
  According to the above-described configuration, the operator operating in the work system and the operating tool in the traveling system are divided and arranged to the left and right, so that an operator seated in the driver's seat can definitely perform a desired operation promptly. This is effective in improving operability.
[0045]
  [Claim 6Configuration, operation and effect of the invention
[0046]
  Claim 6The invention according to claim1-5In the invention according to any one of the above, the standard work mode and the traction work mode can be selected by turning on the collective switch.
[0047]
  According to the above configuration, it is possible not only to simply turn on / off the predetermined control element, but also to turn on / off the control element suitable for the work mode, which can be used more conveniently.
[0048]
DETAILED DESCRIPTION OF THE INVENTION
  FIG. 1 shows the entire agricultural tractor constructed to the rotary tillage specification, and FIG. 2 shows the rear part thereof. This agricultural tractor has a structure in which a rotary cultivator 2 which is an example of a working device is connected to a rear portion of a tractor main body 1 configured in a four-wheel drive specification via a three-point link mechanism 3 so as to be movable up and down and rolled. It has become. Here, as shown in FIG. 2, the three-point link mechanism 3 is composed of a top link 3a and a pair of left and right lower links 3b, and is driven by a lift cylinder 4 comprising an exterior single-acting hydraulic cylinder. The lift arm 5 and the left and right lower links 3b are connected via a lift rod 6 and a rolling cylinder 7, respectively.
[0049]
  FIG. 6 shows an outline of a traveling transmission system in the tractor main unit 1. The output of the engine 9 is transmitted to the transmission case 11 via the main clutch 10, and after being shifted in multiple stages by the gear transmission 12, is transmitted to the left and right rear wheels 14 via the rear differential mechanism 13, and after the shift The branched power is transmitted to the left and right front wheels 17 via the front wheel transmission mechanism 15 and the front differential mechanism 16. Although not shown, a part of the engine output is shifted in the transmission case, and then is taken out from the PTO shaft 18 and transmitted to the rotary tiller 2. The main clutch 10 is mechanically coupled so as to be cut by a depression of a main clutch pedal 19 provided on the left side of the driving unit, and is interposed between the left and right rear wheels 14 in the transmission system. These side brakes 20 are mechanically interlocked so as to be braked by stepping on side brake pedals 21 arranged in parallel on the right side of the feet of the driving unit.
[0050]
  Here, as shown in FIG. 7, the front wheel transmission mechanism 15 includes a low speed hydraulic clutch 22 and a high speed hydraulic clutch 23, and only the low speed hydraulic clutch 22 is inserted to change the front wheel 17 to the rear wheel 14. It can be driven at a tuned standard speed, and by inserting only the high-speed hydraulic clutch 23, the front wheel 17 can be driven at a speed approximately double that of the rear wheel 14, and both clutches 22, 23 can be driven. The power transmission to the front wheel 17 is cut off by cutting both together.
[0051]
  Further, the side brake pedal 21 and the side brake 20 are interlocked and connected via a hydraulic cylinder 24 and a rod 25. Normally, the hydraulic cylinder 24 is drained and is in an extension limit state. When the pedal is depressed, the rod 25 is pulled forward, the side brake 20 is braked, and even when the side brake pedal 21 is not depressed, the hydraulic cylinder 24 is shortened by the pressure oil supply and the rod 25 The side brake 20 is also braked by being pulled forward.
[0052]
  This agricultural tractor is provided with a function for controlling the working position and orientation of the rotary tiller 2, a front wheel shift control function for operating the front wheel transmission mechanism 15, and a brake control function for operating the side brake 20. A control block for executing the above control is shown in FIG.
[0053]
  As control elements of the control function for controlling the working position and orientation of the rotary tiller 2, there are a lifting control system for moving the rotary tiller 2 up and down by the lift cylinder 4, and a rolling control system for tilting the rotary tiller 2 right and left by the rolling cylinder 7. Furthermore, the elevation control system includes a position control system for raising and lowering the rotary tiller 2 to an arbitrary height set by the driver, and raising and lowering the rotary tiller 2 based on the tilling depth detection result. An automatic tilling control system that stably maintains the depth at the set tilling depth and when the front wheel 9 of the tractor main unit 1 is steered more than the set angle, the rotary tiller 2 is automatically raised to the set upper limit position. An auto-up control system, a backup control system that automatically raises the rotary tiller 2 to the set upper limit position when the machine is moved backward, In preference to Deployment control system list automatic plowing depth control system contains a priority elevation control system that can be arbitrarily lowering the rotary cultivator 2. In addition, the rolling control system includes a standard rolling control system that maintains the rotary tiller 2 at a horizontal tilt angle that is set regardless of the horizontal tilt of the tractor main unit 1 in a flat field, and a rotary tiller 2 in a tilted field. And an inclined ground rolling control system for maintaining the set right and left inclination angle. The electromagnetic control valve 26 that controls the operation of the lift cylinder 4 and the electromagnetic control valve 27 that controls the operation of the rolling cylinder 7 are connected to a control device 30 that uses a microcomputer. An outline of each control system for operating the control valve 26 and the electromagnetic control valve 27 for rolling will be described.
[0054]
[Position control system]
  As a position control system input device, a potentiometer-based position setter 33 in which a target height is set based on an operation of an elevating lever 32 arranged on the right side of the driver seat 31 and swinging of the lift arm 5 A lift arm sensor 34 using a potentiometer that detects the height of the rotary tiller 2 from an angle is connected to the control device 30, and the set value from the position setter 33 and the detected value from the lift arm sensor 34 are balanced. As described above, the lift cylinder 4 is controlled to extend and contract via the electromagnetic control valve 26 for raising and lowering, so that the rotary tiller 2 can be raised and lowered to a position corresponding to the operating position of the raising and lowering lever 32 and held at that position. it can.
[0055]
(Standard automatic tilling control system)
  As an input device of this standard automatic tilling control system, a working depth setting device 35 using a potentiometer for setting a target working depth and a potentiometer for detecting the swing displacement amount of the rear cover 36 in the rotary tiller 2 as an actual working depth Is connected to the control device 30, and the lifting / lowering electromagnetic control valve 26 is set so that the plowing depth setting value from the plowing depth setting device 35 and the plowing depth detection signal from the cover sensor 37 are balanced. By performing the expansion / contraction control of the lift cylinder 4 via the rotary cultivator 1, the rotary tilling can be performed at a predetermined tilling depth set regardless of the forward / backward inclination of the tractor main unit 1 or the state of settlement to the field.
[0056]
[Automatic tilling control system for engine load]
  As input devices of this automatic tilling depth control system, the tilling depth setting device 35, the rotation sensor 38 for detecting the engine speed, and the lift arm sensor 15 are connected to the control device 30, and basically. The height of the rotary tiller 2 (the height of the lift arm 5) is maintained at the target tilling depth set by the tilling depth setting device 35, and ascending control is performed assuming that when the engine load increases, the tilling depth becomes deeper. When the engine load is restored, the actual tilling depth can be stabilized by performing the descending control so that the original tilling depth is obtained. Here, the engine load is detected based on a signal from the rotation sensor 38, and the control amount to the electromagnetic control valve 26 is determined based on, for example, fuzzy inference in accordance with the fluctuation of the engine load. Therefore, in the lift control using the engine load-compatible automatic tilling control system, the cover sensor 37 used in the standard automatic tilling control system is unnecessary, and the roughing work in the wet field, the internal tilling work, It is effectively used in a rotary tillage work such as a standing work while the rear cover 36 is largely lifted.
[0057]
[Auto-up control system]
  As input devices for the auto-up control system, a steering sensor 39 that detects a swing angle of a pitman arm (not shown) that steers the front wheels 17 in the tractor main unit 1 and a main speed that sets a traveling speed in the tractor main unit 1 are set. Traveling shift sensors 42 and 43 that detect the operating positions of the shift lever 40 and the forward / reverse switching lever 41 and the operating positions of the PTO shift lever 44 that selects the rotational speed of the PTO shaft 18 in the tractor main unit 1 are detected. A PTO shift sensor 45 is connected to the control device 30.
[0058]
  In this auto-up control system, it is detected that the vehicle is in a forward traveling state based on signals from the traveling speed change sensors 42 and 43, and power is transmitted to the PTO shaft 18 based on a signal from the PTO speed change sensor 45. At the time, that is, when the rotary tillage layer 2 is driven and traveling forward, the front wheel 17 is steered from the straight traveling state to the left or right by a steering angle 39 or more (for example, 30 degrees or more). When it is detected that the vehicle has been turned, the rotary tiller 2 is automatically controlled to the set upper limit.
[0059]
[Backup control system]
  As input devices of the backup control system, the traveling speed change sensors 42 and 43 are connected to the control device 30, and when it is detected that the tractor main unit 1 is in the reverse drive state, the rotary tiller 2 is set. Therefore, it is possible to prevent the rotary tiller 2 from coming into contact with the reed at the time of reverse travel at the end.
[0060]
[Priority lift control system]
  As an input device of the priority lifting control system, a priority lifting switch 48 operated by a priority lifting lever 47 provided on the right side of the steering handle 46 provided in front of the driving unit in the tractor main unit 1 is connected to the control device 30. Has been. This priority lift lever 47 is configured as a lever that can swing up and down and is biased to return to neutral. With one-shot operation upward, the rotary tiller 2 rises to the upper limit in preference to the selected lift control system. Then, the descent control is performed to the target plowing depth set by the elevating control system in which the rotary tiller 2 is selected by the one-shot swing operation downward.
[0061]
[Rolling control system]
  As an input device of the rolling control system, a tilt detection mechanism 50 that detects the left / right tilt angle of the tractor main unit 1 using a gravity tilt sensor or an angular velocity sensor, and a target tilt angle in the left / right direction of the rotary tiller 2 A potentiometer-based tilt angle setting device 51 that is set to (for example, left and right horizontal), a stroke sensor 52 that detects the length of the rolling cylinder 7, and a manual tilt switch 53 are connected to the control device 30. According to this rolling control system, when the tractor main unit 1 is tilted to the left or right, based on the detection value of the tilt detection mechanism 50, the tilt of the rotary tiller 2 accompanying the tilt of the main unit is corrected to the target tilt angle. The target cylinder length to be calculated is calculated, and the rolling cylinder 7 is expanded and contracted via the electromagnetic control valve 27 so as to match the target length, so that the tilt angle of the rotary tiller 2 is stably maintained at the target tilt angle. It is done.
[0062]
  The manual tilt switch 53 tilts the rotary tiller 2 upward in the right direction only while operating to the “up” position, and moves the rotary tiller 2 in the lower right direction only while operating in the “down” position. The rolling cylinder 7 is preferentially operated so as to be inclined, and when the manual operation switch 53 is released, the return control is performed to the original target inclination angle.
[0063]
  The inclined land rolling control system is used when the tractor main body 1 travels along the contour line of the inclined farm field, and is basically the same as the standard rolling control described above, The target inclination angle is automatically corrected in anticipation of wheel settling.
[0064]
  Next, means for selecting each control system and setting a target value will be described. As shown in FIGS. 3 and 5, an operation panel 55 is provided on the right side of the driver's seat 31 in the tractor main unit 1, and the plowing depth setting device 35 configured in a rotary dial type, the automatic plowing depth Automatic elevating mode selection switch as an individual operation tool to select either standard automatic elevating control mode with control sensitivity set as standard, standard automatic elevating control mode with sensitive sensitivity set, or engine load compatible automatic elevating control mode 56, a rolling control mode selection switch 57 as an individual operation tool for selecting either the standard rolling control mode or the inclined land rolling control mode, and a rotary for correcting the control reference value in accordance with the specifications of the rotary tiller 2 A specification selection switch 58, the tilt setting device 51 configured as a rotary dial, and a rotary dial for setting an upper limit of the lift arm 5 , A changeover switch 60 as an individual operation tool for individually turning on / off auto up control, a changeover switch 61 as an individual operation tool for individually turning on / off backup control, and a manual tilt switch 53. ing. The switches 56, 57, and 58 for selecting a mode and the like are constituted by panel touch switches in which the selected contents are sequentially switched each time a pressing operation is performed, and the on / off switching switches 60, Reference numeral 61 denotes a panel switch that repeats on / off each time a pressing operation is performed. The manual tilt switch 53 is a neutral return type lever switch.
[0065]
  In addition, the upper part of each of the automatic lifting / lowering mode selection switch 56, the rolling control mode selection switch 57, and the rotary specification selection switch 58, which are individual operation tools, is an LED display that indicates the specification selected for each pressing operation by lighting. Lamps L1, L2, L3 and L4 are provided. Further, the side of the auto up control on / off switch 60 and the backup control on / off switch 61, which are individual operating tools, are lit when operated and turned off. Display lamps L4 and L5, each of which is an LED that turns off, are provided.
[0066]
  Further, as shown in FIG. 4, a front panel 66 having a steering handle 65 is provided with a display lamp ML1 that is turned on / off in response to the operation of the rolling control mode selection switch 57, and the standard automatic tillage control is turned on / off. Corresponding display lamp ML2 which is turned on / off, display lamp ML3 which is turned on / off corresponding to on / off of the engine load-compatible automatic tillage control, display lamp ML4 which is turned on when the lifting operation is performed by the priority lifting lever 47, backup A display lamp ML5 that is turned on / off in response to the on / off of the control system and a display lamp ML6 that is turned on / off in response to the on / off of the auto-up control system are provided. It is possible to easily visually check the specifications and the like.
[0067]
  Further, a traveling mode selection switch 67 is provided near the lower part on the left side of the front panel 66. This travel mode selection switch 67 is composed of a panel touch type switch in which the travel mode selected every time the push operation is performed. The “rapid turn mode”, “small turn mode”, and “four wheel drive mode”. In addition, the “two-wheel drive mode” can be selected, and an electromagnetic control valve 68 for controlling the operation of the hydraulic clutches 22 and 23 of the front wheel transmission mechanism 15 and the hydraulic cylinder 24 for side brake operation. An electromagnetic control valve 69 that controls the operation of the above is connected to the control device 30 and controlled as follows according to the selected travel mode.
[0068]
  [Quick turn mode]
  When the travel mode selection switch 67 is selected to the “rapid turn mode”, a four-wheel drive state in which the front wheel speed change mechanism 15 is maintained at the low speed stage appears, and the front wheel 17 is in a range where the front wheel steering angle is less than the setting. Driven at a low speed synchronized with the rear wheel 14. When it is detected that the front wheel steering angle is greater than or equal to the set value, the front wheel speed change mechanism 15 is switched to the high speed stage, and the side brake 20 of the rear wheel 14 that is on the inside of the turn is braked to greatly increase the steering angle. The vehicle is rapidly turned by the three-wheel drive of the right and left front wheels 17 that have been increased in speed and the rear wheels 14 that are driven to increase speed through the rear differential mechanism 13. It should be noted that this sudden turn is checked based on the travel shift information so that it is executed only when the travel speed is lower than the set speed.
[0069]
  It should be noted that the excitation state of the electromagnetic control valve 69 when the side brake 20 is operated can be adjusted so that the braking force in the sudden turn mode can be adjusted. It is also possible to apply braking.
[0070]
  [Small turning mode]
  When the travel mode selection switch 67 is selected to be the “turn turning mode”, a four-wheel drive state in which the front wheel transmission mechanism 15 is maintained at the low speed stage appears, and the front wheels 17 are in a range where the front wheel steering angle is less than the setting. Driven at a low speed synchronized with the rear wheel 14. When it is detected that the front wheel steering angle is equal to or greater than the set value, the front wheel speed change mechanism 15 is switched to the high speed stage, and the left and right front wheels 17 and the rear differential mechanism 13 which are greatly steered and accelerated are used. The vehicle is turned in a small turn by four-wheel drive with the left and right rear wheels 14 driven to distribute speed. This small turn is also checked based on the travel shift information.
[0071]
  [Four-wheel drive mode]
  When the travel mode selection switch 67 is selected to be the “four-wheel drive mode”, the side brake 20 is not braked even if the front wheels 17 are steered beyond the set angle, and the front wheel transmission mechanism 15 is always in the low speed stage. The vehicle is driven and steered in the four-wheel drive state maintained in the above.
[0072]
  [Two-wheel drive mode]
  When the travel mode selection switch 67 is selected to be the “two-wheel drive mode”, the side brake 20 is not braked even if the front wheels 17 are steered beyond the set angle, and the front wheel transmission mechanism 15 is always in the neutral state. Running and steering in a two-wheel drive state in which only the rear wheel 14 is driven while being maintained are performed.
[0073]
  On the left side of the front panel 66, a display lamp ML7 that is turned on / off in response to the on / off of the “swift turn mode”, and a display that is turned on / off in response to the on / off of the “turn turning mode”. Lamp ML8, display lamp ML9 that turns on / off in response to ON / OFF of “four-wheel drive mode”, and display lamp ML10 that turns on / off in response to ON / OFF of “two-wheel drive mode” are provided. This makes it possible to easily visually check the current driving mode selection even during driving.
[0074]
  And in this invention, the following operation means are provided in addition to the said structure. That is, a collective switch 70 is provided near the lower part on the right side of the front panel 66 and connected to the control device 30. The collective switch 70 is composed of a panel touch type switch with a built-in monitor lamp that is alternately switched on and off each time it is pushed. As shown in the chart of FIG. Control elements of the control functions related to the work position and orientation of “Standard automatic tilling control”, “Rolling control”, “Auto-up control”, “Backup control” and the control elements of the traveling system control function “Quick turn” “Mode” is turned on all at once (indicated by a circle in the chart), and the built-in monitor lamp (display means) ML11 is turned on to make it easy to recognize that the collective on state is selected. ing. Then, after the collective switch 70 is turned on, any one of these control elements that are collectively turned on is selected or changed by the selection switches 56, 57, and 58 and the changeover switches 60 and 61 as individual operation tools. Then, the monitor lamp ML11 is switched to the extinguished state, and displays that the collective on state is released.
[0075]
  In addition, when the batch switch 70 is turned off, “standard automatic tilling control”, “engine load compatible automatic tilling control”, “auto up control”, “backup control”, and “rolling control” are in the off state (in the chart) The “X control” is set so that only “position control” is possible, and the control function of the traveling system is set to the state specified in “four-wheel drive mode”.
[0076]
  In addition, the engine 9 is stopped in a state where the control elements of the control function related to the work position and orientation of the work apparatus and the control elements of the traveling system control function are arbitrarily selected on and off, and the engine 9 is started again and the control apparatus When 30 is turned on, the on / off selected state of each control element is programmed so that each control is resumed in the on / off selected state when the engine 9 is stopped.
[0077]
  The present invention can also be implemented in the following forms.
[0078]
  (1) The collective switch 70 is constituted by a panel touch type switch in which the selected contents are sequentially switched every time the push operation is performed, and a first on state for standard tillage work, a second on state for towing work, and It is also possible to implement such that the off state can be selected and operated, and the control elements of the control function are turned on and off as shown in the chart of FIG. 10 in each selected state. As is well known, the draft control for towing work is performed by raising and lowering the lift arm 5 so as to maintain the towing load of a towing type work device such as a plow connected to the three-point link mechanism 3 at a set value. The depth is stabilized, and a traction load detection sensor and a traction load setting device are connected to the control device 30.
[0079]
  (2) As a control element of the control function in the traveling system, automatic shift control for shifting the traveling speed in accordance with the engine load may be added.
[0080]
  (3) The collective switch 70 may be a lever type switch in addition to a panel touch type switch.
[Brief description of the drawings]
[Fig. 1] Side view of the entire tractor
FIG. 2 is a perspective view of the rear part of the aircraft.
[Fig. 3] Plan view of the rear of the fuselage
FIG. 4 is a front view of the front panel.
FIG. 5 is a plan view of the operation panel.
[Fig. 6] Schematic diagram of the driving transmission system
FIG. 7 is a schematic diagram showing an operation system for a front wheel speed change mechanism and a side brake.
[Fig. 8] Control block diagram
FIG. 9 is a diagram for explaining the operation of the collective switch.
FIG. 10 is a chart for explaining the operation of a collective switch according to another embodiment.
[Explanation of symbols]
  1 Tractor machine
  2 Working device
  17 Front wheel
  56 Individual operation tools
  57 Individual controls
  60 Individual controls
  61 Individual controls
  70 Collective switch

Claims (6)

With a batch switch that switches both the control function related to the work position and orientation of the work equipment mounted on the tractor machine and the control function of the traveling system of the tractor machine to the on or off state in a batch operation,
As a control element of the control function related to the work position and posture of the work device, a tilling control system that maintains the ground work depth of the work device at a set depth, and rolling control that maintains the left and right tilt angle of the work device at a set angle. System, an auto-up control system that raises the working device when the front wheel of the tractor main unit is steered beyond a set angle, and a backup control system that raises the working device when the tractor main unit is in a reverse drive state. In addition, as a control element of the control function of the traveling system, a front wheel speed change control system that increases the speed of the front wheels in conjunction with the front wheel steering more than the set angle is provided,
An individual operation tool for individually selecting the functions of the tilling depth control system, the rolling control system and the front wheel shift control system, and an individual operation tool for individually switching on and off the functions of the auto up control system and the backup control system,
When the collective switch is turned on, the tilling depth control system, the rolling control system, and the front wheel shift control system are in an on state that operates in a preset standard function state or standard sensitivity state , and the auto up control system and backup When the control system functions are turned on, the batch is turned on.
In a state where all the control elements of the control function are switched on by a collective switch operation, if any one control element is selectively changed or switched off by the corresponding individual operation tool, the control The function of only the control element corresponding to the operated individual operation tool among the functions is changed and the collective ON state by the collective switch is released,
When the engine is stopped in a state where the function of each control element is selected by the individual operation tool, the engine is started again and the control device is started, the function of each control element is the time when the engine is stopped. An agricultural tractor configured to be resumed in the function selection state . The agricultural tractor according to claim 1, further comprising an individual operation tool for individually adjusting a function or sensitivity of a control element of a control function that is switched on by the collective switch. Display means for displaying the fact that the collective switch has been turned on by the collective switch, and when the individual operation tool is operated after the collective switch has been turned on by the collective switch, the collective operation is canceled by the display means The agricultural tractor according to claim 1 , wherein the agricultural tractor is configured to display the information. The agricultural tractor according to any one of claims 1 to 3 , wherein the collective switch is disposed in the vicinity of a front panel provided in front of a driving unit in the tractor main unit. Around the driver's seat, as well as deploy the operating member of the working device based on the one horizontal side, according to claim 1 that is deployed traveling system of the operating tool on the other lateral side Agricultural tractor. The agricultural tractor according to any one of claims 1 to 5 , wherein a standard work mode and a traction work mode can be selected by turning on the collective switch.

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