JP2001182560A - Switch operation in working vehicle - Google Patents

Abstract

PROBLEM TO BE SOLVED: To solve such problems that a conventional working vehicle has a plurality of levers or the like corresponding to applications so that it is possible to perform fine operation, but it can be troublesome to perform such fine operation, and they are performed by an operator himsef/herself so that it is difficult to perform adjustment suitable for work, and also it is necessary to perform adjustment by operating the levers in a same way at every conduct work. SOLUTION: A working vehicle provided with a mode switch capable of selecting a working mode/non-working mode, contains set values in a vehicle speed change ratio, an engine speed and a PTO speed change stage at the working mode alterably. The vehicle has a setting speed storage means 60 which stores the set value of the vehicle speed change ratio and the engine speed, and a PTO setting storage means 61 which stores the set of the PTO speed change stage. Each altered set value can be stored, and even after alteration of the set value, an initial value before alteration can be brought back.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a technique for realizing a simple operation by changing a traveling speed and a working machine speed of a working vehicle such as a tractor by operating a switch. And a configuration that enables flexible setting changes. In addition, the present invention relates to a technology that enables a display panel to clearly grasp an operation state.

[0002]

2. Description of the Related Art Conventionally, in a working vehicle such as a tractor,
Various types of operation levers are arranged on an operation unit near a seat where an operator is located. For example, a main shift lever and a sub-shift lever for performing a traveling shift, a reversing lever for switching between forward and backward traveling, an accelerator lever (pedal), a brake pedal, and the like are provided. Further, a PTO clutch lever, a PTO shift lever, and the like for operating a work machine connected to the traveling vehicle are provided. During traveling movement, the main transmission lever and the sub transmission lever are operated to change the traveling speed, and at the time of work, the main transmission lever and the sub transmission lever are similarly operated to carry out traveling speed change in accordance with the work state. In order to change the driving speed of the working machine and the PTO clutch for connecting and disconnecting the drive to the working machine, the user has been working while manipulating the PTO shift lever. In addition, these operation levers are scattered on the left, right, front and rear positions of the seat, and in order to check the operation state of each operation lever, the numerical value displayed on the lever side of each operation lever or the like is used. I was looking at the letters.

[0003]

In the above prior art, since the levers corresponding to the respective applications are provided, it is possible to perform a fine operation, but on the other hand, the number of levers is too large. However, there is a problem that operation becomes difficult. In addition, since these operations are performed by the operator himself, it is difficult to make adjustments suitable for the operation, and these adjustments are not stored, so the operator operates the levers each time the operation is performed. Need to make adjustments. In addition, since each lever is scattered around the seat, it is difficult to operate the lever, and since the operation state of each lever needs to be visually observed near each lever,
Operation was similarly difficult. Therefore, in the present invention, the switch operation is configured to obtain a preset vehicle speed and work implement speed, and further, the configuration is such that the operator can change the set value,
It aims to further improve operability. Further, the operation unit and the display panel are arranged near the driver's seat to improve operability.

[0004]

The above is the problem to be solved by the present invention. Next, means for solving the problem will be described. That is, in the work vehicle provided with the mode switch capable of selecting the work mode or the non-work mode, the set value of the work mode can be arbitrarily changed.

According to a second aspect of the present invention, a work mode
In a working vehicle provided with a mode switch capable of selecting a non-working mode, and by selecting the mode switch, the traveling speed during work and the PTO rotation speed are simultaneously determined, the vehicle speed change ratio and the engine speed in the work mode are set. , The set value of the PTO gear stage can be changed.

Further, in the non-working mode, the set value of the PTO speed can be changed.

Further, the present invention further comprises a set speed storage means for storing the set values of the vehicle speed ratio and the engine speed, and a PTO setting storage means for storing the set values of the PTO gear stage. The set value after the change can be stored.

According to a fifth aspect of the present invention, the set speed storage means and the PTO setting storage means can recall the initial value before the change of the set value even after the change of the set value.

According to a sixth aspect of the present invention, a work mode
An operation unit for operating the mode switch is provided in the vicinity of the driver's seat in a work vehicle in which a mode switch capable of selecting a non-operation mode is provided, and the traveling speed and the PTO rotation speed are determined by the selection of the mode switch. .

[0010] According to a seventh aspect of the present invention, a display panel for displaying an operation state of the mode switch is provided near a driver's seat.

Further, a hidden switch for changing a set value is provided in the operation unit.

[0012]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, embodiments of the present invention will be described with reference to the accompanying drawings. FIG. 1 is a schematic diagram showing a drive system of a work vehicle, FIG. 2 is a configuration diagram of a switch operation system according to the present invention,
3 is an embodiment of the operation unit, FIG. 4 is an embodiment of the display panel, and FIG. 5 is an embodiment of the operation unit provided with the hidden switch.

First, a schematic configuration of a working vehicle which is an embodiment provided with a mode switch according to the present invention will be described with reference to FIG. The work vehicle transmits the output of the engine 1 from the engine output shaft 1a to a hydraulic continuously variable transmission 2 (hereinafter, referred to as HST2) which is a continuously variable transmission. In this embodiment, the HST is used as the continuously variable transmission, but a configuration may also be adopted in which a belt continuously variable transmission (CVT) or the like is mounted.

The HST 2 comprises a variable displacement hydraulic pump 21 and a hydraulic motor 22. By tilting the respective movable swash plates 21a and 22a, the pump discharge amount and the motor output are changed, and the The engine output input to the device 3 is shifted.

The movable swash plate 21a is provided with a forward electromagnetic proportional valve 12 and a reverse electromagnetic proportional valve 13, which will be described later. The movable swash plate 21a is moved forward by operating the respective electromagnetic proportional valves 12 and 13. The hydraulic oil is tilted to the side or the reverse side to control the direction and flow rate of the hydraulic oil flowing into and out of the hydraulic motor 22. The movable swash plate 22a is provided with a motor electromagnetic proportional valve 14, and the motor electromagnetic proportional valve 14 is provided.
4, the movable swash plate 22a is tilted, and the rotational speed of the hydraulic motor 22, which is rotationally driven by the inflow and outflow of hydraulic oil from the hydraulic pump 21, is changed. That is,
The vehicle speed is mainly shifted by the tilting operation of the movable swash plate 21a, and the auxiliary speed is changed by the tilting operation of the movable swash plate 22a.

The engine output shifted in the HST 2 is transmitted to front and rear wheel differentials 4a and 5a arranged in front and behind the work vehicle via a transmission device 3, and transmitted to the front and rear wheels 4.5 via an axle. Drive. In addition,
In the present embodiment, the HST 2 is of a variable displacement type for both the hydraulic pump and the motor, but it may be configured such that either one is of the variable displacement type. Further, a configuration in which only the rear wheel 5 is driven may be employed.

The engine output shaft 1a extends through the hydraulic pump 21 and extends into the transmission device 3. In the transmission device 3, after passing through the PTO clutch 6 and the PTO transmission device 7, the engine output shaft 1a is connected to the PTO shaft 8a. Connected. In such a configuration, the engine output is the PTO transmission 7
After that, the work machine 8 connected to the end of the PTO shaft 8a is driven.

Next, the overall configuration of the switch operation system according to the present invention will be described with reference to FIGS. The control means 10, which is the main controller of the switch operation system, has a CP
U, storage means, etc., and switches, sensors, actuators and the like of each operation system are connected, and the switch operation system according to the present invention is controlled by a control program.

The accelerator pedal 50 is provided with an angle sensor 50s for detecting the turning angle of the pedal, and the brake pedal 51 is also provided with an angle sensor 51s for detecting the turning angle of the pedal. The control means 10 is connected to the accelerator / brake pedal 50.
The stepping state of 51 is constantly sensed.

The reversing lever 52 is provided with a reversing switch 52s.
Are connected to the control means 10 and the reverser lever 52
(F), neutral (N), and reverse (R) switching by the operation of.

An electronic governor controller 11 is connected to the control means 10 and controls the number of revolutions of the engine 1 in accordance with a control command from the control means 10. The electromagnetic proportional valve 12 for forward movement, the electromagnetic proportional valve 13 for reverse movement, and the electromagnetic proportional valve 14 for motor,
, Respectively, according to the control command of the control means 10,
The swash plate angles of the hydraulic pumps / motors 21 and 22 are controlled.
The traveling speed changing means is constituted by the electronic governor controller 11 and the electromagnetic proportional valves 12, 13 and 14 which are the speed change actuators described above.

The PTO clutch 6 and the PTO transmission 7 are provided with proportional solenoid valves 16 and 17, respectively, and are connected to the control means 10, respectively. Then, in accordance with an instruction from the control means 10, by operating the electromagnetic proportional valve 16, the on / off operation of the PTO clutch 6 is performed, and the connection / disconnection of the engine output to / from the PTO shaft 8a is performed. Also, the electromagnetic proportional valve 1
By operating the PTO transmission 7, the PTO transmission 7 is switched to a multi-stage (three stages in this embodiment),
The rotation speed of a is controlled.

Next, a method of controlling the traveling speed by the switch operation system will be described. As shown in FIG. 3, the operation unit 30 is provided with a plurality of mode switches corresponding to a work mode and a non-work mode. In this embodiment, the mode switches are a road running switch 31a, a rough switch 32a, a fine earth switch. 32b, scratch switch 32
A switch of four modes c is provided. As will be described later, the mode switch enables the vehicle speed to be increased / decreased and the driving state of the working machine to be changed only by operating the switch. In the present invention, the conventional speed change lever, auxiliary speed change lever, PTO speed change A simple operation by a switch operation is enabled without any levers such as a lever. The operation unit 30 is arranged near the driver's seat of the work vehicle, and is arranged so that the operator can operate the switch while operating the steering wheel.

Of the mode switches, three switches, a roughing / small / scratch switch 32a, 32b, and 32c, are defined as working mode switches 32, and a road running switch 31a is defined as a non-working mode switch 31. The work mode is a state in which the work machine 8 connected to the work vehicle is driven, and the non-work mode is a state in which the work machine 8 is stopped, that is, when the work vehicle travels on the road (moving travel). Mode.

Then, as shown in FIG. 2, running on the road, roughing, fine soil, and scraping switches 31a, 32a, 32b, 3
2c are connected to the control means 10, respectively. Also,
The control means 10 is provided with a set speed storage means 60. The set speed storage means 60 has a speed ratio of the HST2 and an engine corresponding to the mode of the rough / small / scratch switch 32a / 32b / 32c. The number of rotations of 1 is stored.

In such a configuration, if any of the mode switches of the roughing / small soiling / scratching switches 32a, 32b, and 32c is selected, the control means 10 sends the set speed storage means 60 The gear ratio and the engine speed corresponding to the mode are acquired, and the tilt angle of the swash plate is instructed to the forward electromagnetic proportional valve 12, the reverse electromagnetic proportional valve 13, or the motor electromagnetic proportional valve 14 according to the set values. Then, the shift of HST2 is performed, and an instruction is sent to the electronic governor controller 11 to adjust the engine speed to the set value.

That is, when the speed ratio acquired by the set speed storage means 60 is a forward speed ratio (normally, when performing work, the speed is forward, so the forward speed ratio is set. )), The main shift is performed by operating the forward electromagnetic proportional valve 12 to change the discharge amount of the hydraulic pump 21, and further operating the motor electromagnetic proportional valve 14 as necessary to The auxiliary drive is performed by changing the rotational drive of the motor. Similarly, when the speed ratio acquired from the set speed storage means 60 is the reverse speed ratio, the reverse gear ratio is operated by operating the reverse electromagnetic proportional valve 13 and the motor proportional valve 14. . In this embodiment, the initial setting of the operation mode is the maximum engine speed, so that the roughing / small earth / scratch switch 32 is used.
When any one of the mode switches a, 32b, and 32c is selected, the control unit 10 controls the electronic governor controller 11 to maximize the engine speed.

On the other hand, when the on-road switch 31a is selected, the control means 10 changes the vehicle speed in accordance with the operation amount of the accelerator pedal 50. That is, the control means 1
0 calculates the target speed of the work vehicle from the detected value of the angle sensor 50s, and in order to achieve this target speed, the electromagnetic actuator proportionally moving valve 12, the electromagnetic proportional valve 14 for the motor, and the electronic governor controller 11 is operated. When the reverser lever 52 is switched to the reverse (R) side, the accelerator pedal 50 is operated by operating the reverse electromagnetic proportional valve 13, the motor electromagnetic proportional valve 14, and the electronic governor controller 11. The reverse shift is performed according to the amount. When the reverser lever 52 is operated to the neutral (N) position, the speed change actuators 12, 13, 14
Is controlled at the neutral position. That is, the movable swash plates 21a and 22
When a is tilted to the neutral position, the drive to the front and rear wheels is stopped.

As described above, in the work vehicle according to the present invention, a plurality of mode switches corresponding to the work mode and the non-work mode are provided near the driver's seat of the work vehicle. 31a ・ 32a ・ 32b ・
32c, and the mode switch is linked to the traveling speed changing means, so that the operator can operate a plurality of shift levers (main shift lever, auxiliary shift lever, etc.) as in the prior art.
With this configuration, it is possible to obtain an appropriate speed according to the application of the work with a simple operation of simply selecting a switch without operating the.

The mode switch is provided in the operation unit 30 with four modes of running on the road, roughing, fine soil, and scraping, and the set speed ratio and engine speed corresponding to each mode are stored and held. So the operator
The desired vehicle speed can be obtained by selecting the mode switch corresponding to the name of each work instead of numerical values such as speed and second speed, so that the operation method is clear and malfunction can be prevented, and operability has been improved. .

In this embodiment, three working mode switches 32 and one non-working mode switch 31 are provided.
Is provided in the operation unit 30, but the configuration is not limited to the present embodiment, and the configuration may be such that four or more work mode switches 32 are used to hold fine settings according to the work application. And narrow down the work application 2
It is also possible to adopt a configuration in which emphasis is placed on simple operations.

Next, an interlocking structure between the shift switch, the PTO clutch 6 and the PTO transmission 7 will be described. When the on-road running / roughing / small / scratch switch 31a / 32a / 32b / 32c of the operation unit 30 is selected, the control means 10 increases and decreases the vehicle speed as described above, The control is also performed.

As shown in FIG. 2, the control means 10 has a PTO setting storage means 61 for storing the set speed (the gear position of the PTO shaft) of the working machine 8 in accordance with the roughing, fine soil and substitute scraping modes, respectively. Electromagnetic proportional valves 16 and 17 are connected to the control means 10 to switch the PTO clutch 6 and the PTO transmission 7, respectively. When the mode switch is selected, the control device 10 instructs the traveling speed changing means to increase or decrease the vehicle speed, and also instructs the electromagnetic proportional valves 16 and 17 to perform the PTO shift / PT
An instruction to connect and disconnect the O-clutch is issued.

Here, when the selected mode switch is the road operation switch 31a in the non-work mode,
An instruction to turn off the PTO clutch 6 is given by the electromagnetic proportional valve 16.
Send to In addition, the selected mode switch is the work mode roughing / fine soiling / scratching switch 32a / 32b / 32
c, the corresponding PTO speed is obtained from the PTO setting storage means 61, and P
An instruction to shift the TO transmission 7 is issued, and an instruction to make the PTO clutch 6 “connected” is sent to the electromagnetic proportional valve 16. In other words, roughing, fine earth, slash switch 32a
Work mode switch 32 composed of 32b and 32c
Is a switch for increasing / decreasing the vehicle speed, and at the same time, has a function as a connection / disconnection of the work machine 8 and a shift switch.

For example, in this embodiment, when the roughing switch 32a is selected, the vehicle speed is reduced to approximately 0.5 m.
/ S, the PTO transmission 7 is shifted to the first speed, and when the fine earth switch 32b is selected, the vehicle speed is set to approximately 0.3 m / s and the PTO transmission 7 is set to the second speed. When the shift switch 32c is selected, the vehicle speed is set to approximately 0.7 m / s, and
That is, the TO transmission 7 is controlled to shift to the second speed.

As described above, the operation of the conventional work vehicle is performed while making full use of the main shift lever, the auxiliary shift lever, and the like.
In order to adjust the traveling speed and adjust the working machine 8 to an appropriate driving state, the working machine is shifted by the PTO shift lever. In addition, the power transmission to the working machine 8 must be turned on and off by the PTO clutch lever. However, according to the switch operation system of the present invention, all of these lever operations can be performed by one switch operation, and the operability has been significantly improved. Further, since the mode switch is given a name according to the work application, the operation is clear and malfunction can be prevented.

As described above, the working vehicle according to the present invention is provided with the mode switch capable of selecting the working mode or the non-working mode, and the traveling speed and the PTO rotation speed are determined by selecting the mode switch. Since the operation unit 30 for operating the mode switch is provided in the vicinity of the driver's seat, the means for performing the traveling operation and the operation of the work machine 8 are arranged in one place, and are scattered around the seat as in the related art. Operability has been greatly improved compared to the configuration that operates the operation lever.

Next, how to use and control the accelerator pedal 50 and the brake pedal 51 in the working mode and the non-working mode according to the present invention will be described.
First, a case where the work mode switch 32 is selected will be described. As described above, the work mode switch 32
Is selected, the set speed storage means 60
The vehicle speed is automatically determined based on the set speed ratio and the engine speed corresponding to each switch stored in the switch.
Hereinafter, traveling at this set speed is referred to as automatic traveling.

If the operator does not like the set speed or wants to change the speed to a more optimum speed, he operates the accelerator pedal 50 and the brake pedal 51 as speed adjusting means to change the speed. It is possible to do it. Specifically, when the operator depresses the accelerator pedal 50 in the automatic driving state, the control means 10 sends a control command to the speed change actuator based on the detection value of the angle sensor 50s to increase the speed ratio of the HST2. Or electronic governor controller 1
1 to increase the number of revolutions of the engine 1. Conversely, when the brake pedal 51 is depressed, the speed ratio of the HST 2 is reduced or the rotation speed of the engine 1 is reduced based on the detection value of the angle sensor 51s.

That is, a control command is sent to the forward electromagnetic proportional valve 12 (or the reverse electromagnetic proportional valve 13) and the motor electromagnetic proportional valve 14 based on the detection value of the angle sensor 50s or the angle sensor 51s. Then, based on this control command, the swash plates of the movable swash plates 21a and 22a of the hydraulic pumps / motors 21 and 22 are tilted by the respective electromagnetic proportional valves 12, 13 and 14. The control means 10 sends a control command to the electronic governor controller 11 based on the detected value of the angle sensor 50s or the angle sensor 51s,
Is controlled to the target rotation speed.

As described above, in the work mode, the engine speed is normally set as the maximum speed. Therefore, in order to increase the vehicle speed from the set speed, the shift actuator is operated to operate the HST2. Will be increased. However, when the setting change for decreasing the engine speed is made by the operator as described later, or when the engine speed is reduced by depressing the brake pedal 51, the shift actuator and the electronic governor controller 11 are operated. Control to obtain the target speed.

As described above, in the switch operation system according to the present invention, the mode switch for switching between a plurality of working modes and the non-working mode is provided.
In the working vehicle in which is arranged, the engine speed is proportional to the rotation of the accelerator pedal 50 in the non-working mode as described above, and the engine speed is determined in accordance with the turning operation of the accelerator pedal 50 or the brake pedal 51 in the working mode. Since the configuration is such that the speed ratio is changed to increase or decrease the speed, the operation method is the same as that of a passenger car in the non-working mode, and the operability is improved. In the work mode, the gear can be shifted by operating the accelerator pedal 50 and the brake pedal 51 while enabling easy operation by automatic running, so that it is possible to flexibly respond to the demands of the operator.

Next, the function for changing the set speed of the switch operation system according to the present invention will be described. As described above, the set speed storage means 60 stores the set speed ratio and the engine speed corresponding to the rough / fine earth / scratch switches 32a, 32b, 32c of the work mode. Further, as described above, if the operator does not like the set speed, the operator operates the accelerator pedal 50 and the brake pedal 51 to operate the accelerator pedal 50 and the brake pedal 51.
It is possible to increase or decrease the vehicle speed. Further, in the present invention, the set speed ratio and the set value of the engine speed stored in the set speed storage means 60 are configured to be changed by an operator and can be customized. That is, the set speed ratio and the engine speed required by the operator himself can be newly stored in the set speed storage means 60.

As shown in FIG. 5, the operation unit 30
Is provided with a change dial 33 for setting change and increase / decrease switches 34 and 35. The switching dial 33 switches the operation state of the operation unit 30 and is normally set to “automatic”.
Automatic traveling is performed at the vehicle speed and the work implement speed corresponding to the set values of the O setting storage means 61. By switching the switching dial 33 between "engine setting", "vehicle speed setting" and "PTO setting", the set speed storage means 60 and the PT
The setting value stored in the O setting storage means 61 is switched to a changeable state.

Then, the switching dial 33 and the increase
Hidden switch 36 composed of reduction switches 34 and 35, etc.
Is usually covered with a cover 36 as shown in FIG. 3 so as not to change the set value by mistake. By providing the hidden switch unit 36 in this manner, a switch that performs a normal operation and a specific operation such as a setting change can be distinguished from each other, and a configuration in which such erroneous operations can be prevented.

When the operator wants to change the set values, the mode switches 32a, 32b, 3
While any one of 2c is selected, the switching dial 3
3 is "engine setting", "vehicle speed setting", "PTO setting"
Switch to any of And, for example, "engine settings"
By pressing the increase / decrease switches 34 and 35 in a state where is selected, the engine speed stored in the set speed storage means 60 is changed. Also,
When the increase / decrease switches 34 and 35 are depressed in a state where “vehicle speed setting” is selected, the speed ratio stored in the set speed storage means 60, that is, the hydraulic pump / motor 21.2
The set value of the tilt angle 2 is changed. Similarly,
When the increase / decrease switches 34 and 35 are depressed while the “PTO setting” is selected, the PTO gear position stored in the PTO setting storage means 61 is changed.

As described above, in the switch operation system according to the present invention, by selecting the mode switch of the work mode, the set speed ratio and engine speed stored in the set speed storage means 60 and the PTO setting storage means 61 are obtained. The automatic driving is enabled by the PTO gears stored in the, while the respective set values can be changed by the operator.
Even if the operator does not like the initial settings at the time of shipment from the factory, the settings can be changed to the desired settings, and a simple operation can be realized, and a flexible response can be made as desired by the operator.

Further, the setting change of the PTO gear stage described above may be performed in the non-working mode.
That is, even when the work vehicle is stopped, the work machine 8 (PT
By rotating the (O-axis), the PTO speed for each work mode can be adjusted. By adopting such a configuration, the adjustment and checking work is easier and the operability is improved as compared with the case where the PTO rotation speed is adjusted while performing the work traveling. However, as described above, in the non-working mode, P
Since the TO clutch 6 is controlled to be turned off, only when the set speed is changed, that is, when the switching dial 33 is switched to “PTO setting”, the PTO
It is necessary to perform control such as control so that the clutch 6 is connected.

As described above, the set speed ratio, the engine speed, and the PTO gear stage after the change are newly stored in the set speed storage means 60 and the PTO setting storage means 61. After changing and saving the values, automatic running is possible with the optimal set gear ratio, engine speed and PTO gear stage that the operator likes, so there is no need to perform setting work every time the key switch is turned ON and OFF. The work efficiency can be improved.

The set speed storage means 60 and the PTO setting storage means 61 store factory set values as initial values. If the operator does not like the factory set value as described above, the operator can change the set value, but even after arbitrarily changing the set value, the operator can call the factory default value. It is configured so that it can be returned. That is, the set speed initial value storage means 60d and the PTO initial value storage means 61d of the control means 10 store the state in which the gear ratio, the engine speed and the PTO gear stage of each mode cannot be rewritten as factory default values, respectively. The initial value storage means 60d and 61 are stored in the operating unit 30 by performing a predetermined initial setting operation.
The stored value of d is recalled to the set speed storage means 60 and the PTO setting storage means 61.
The predetermined initial setting operation is, for example, an increase / decrease button 3
Existing buttons may be used, such as pressing buttons 4.35 at the same time for two seconds or more, or an initial setting button may be separately provided, and the configuration is not particularly limited. With such a configuration, the operator can always return the setting value to the initial value even after the setting value is changed. Therefore, if the setting is changed by mistake or the original setting value is changed. This is effective when it is determined that the operability (initial value) is excellent.

Next, the configuration of the display panel 40 according to the present invention will be described. FIG. 4 shows a display panel 40 for visually grasping the state of the switch operation system according to the present invention. The display panel 40 is arranged near the driver's seat, such as at the front of the operation unit, so that the operator can easily check the operation state while running and working. Display panel 40
On the upper side, a plurality of confirmation lamps 41 to 49 and the like are arranged, and these confirmation lamps 41 to 49 and the like are connected to the control means 10 as shown in FIG.

When the mode switch of the work mode / non-work mode is selected, the corresponding mode confirmation lamps 41 to 44 are turned on. Are turned on. For example, when the road operation switch 31a in the non-operation mode is selected, the confirmation lamp 41 is turned on, and the operator can explicitly confirm that the operation mode is the non-operation mode. When the roughing switch 32a is selected, the confirmation lamp 42 is lit to indicate that the roughing mode is set, and the PTO confirmation lamp 46 is lit to clearly indicate that the PTO shaft is rotationally driven. However, for example, when the rough raising mode is set to the first gear of the PTO, the PTO1 confirmation lamp 47 is turned on.

As described above, the easy operation is realized by the switch operation of the operation unit 30, and the operation state is easily visually confirmed by the operator on the display panel 40, and all the operation states of the traveling operation and the PTO operation are displayed. Since it is displayed on one display panel,
It is not necessary to individually check the operating states of the levers scattered around the seat as in the conventional case, and the operability has been significantly improved. In addition, since the display panel 40 is disposed near the driver's seat together with the operation unit 30, the operator can easily check the work state while operating, so that stable operation is possible.

[0054]

As described above, the present invention has the following advantages. That is, in the working vehicle provided with the mode switch capable of selecting the working mode or the non-working mode, the set value of the working mode can be arbitrarily changed. As a result, the setting can be changed according to the operator's request, and the configuration is excellent in operability and flexibility.

Further, according to the second aspect, the work mode
In a working vehicle provided with a mode switch capable of selecting a non-working mode, and by selecting the mode switch, the traveling speed during work and the PTO rotation speed are simultaneously determined, the vehicle speed change ratio and the engine speed in the work mode are set. , So that the set value of the PTO gear can be changed,
In addition to the simple operation by the switch operation, the engine speed and the PTO speed can be switched according to the demands of the operator, resulting in a configuration excellent in operability and flexibility. Further, it is easy to make the working machine correspond to uses other than the fixed work.

Further, since the set value of the PTO speed can be changed in the non-working mode, the PTO speed can be adjusted even when the vehicle is stopped. Became easier.

According to a fourth aspect of the present invention, there are provided a set speed storage means for storing the set values of the vehicle speed ratio and the engine speed, and a PTO setting storage means for storing the set value of the PTO speed. Since the set value after the change is configured to be memorable, after the operator saves his favorite set value, there is no need to change the setting every time the key switch is turned ON and OFF, so that stable work can be performed at all times. Configuration.

Further, the setting speed storage means and the PTO setting storage means can recall the initial value before the setting value change even after the setting value change, so that the setting change is erroneously made. This is effective in the case where the user performs the operation, or when he / she wants to perform the operation again with the factory default settings.

That is, as described in claim 6, the work mode
An operation unit for operating the mode switch is provided in the vicinity of the driver's seat in a work vehicle in which a mode switch capable of selecting a non-operation mode is provided, and the traveling speed and the PTO rotation speed are determined by the selection of the mode switch. Therefore, the means for performing the traveling operation and the operation of the work machine are configured in one place, and the operability is remarkably improved as compared with the conventional configuration in which the operating levers scattered around the seat are operated.

Further, since the display panel for displaying the operation state by the mode switch is provided in the vicinity of the driver's seat, it is easy for the operator to visually confirm the operation state. Since all operation states of the operation are displayed on one display panel, it is not necessary to individually check the operation states of the levers scattered around the seat as in the related art, and the operability is greatly improved.

Further, since a hidden switch for changing a set value is provided in the operation unit, a switch for performing a normal operation and a specific operation for changing a setting can be distinguished. Erroneous operation can be prevented.

[Brief description of the drawings]

FIG. 1 is a schematic diagram showing a drive system of a work vehicle.

FIG. 2 is a configuration diagram of a switch operation system according to the present invention.

FIG. 3 is a view showing an embodiment of an operation unit.

FIG. 4 is a diagram illustrating an example of a display panel.

FIG. 5 is a diagram showing an embodiment of an operation unit provided with a hidden switch.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Engine 2 HST 6 PTO clutch 7 PTO transmission 8 Work implement 10 Control means 11 Electronic governor control 12 Electromagnetic proportional valve for forward 13 Electromagnetic proportional valve for reverse 14 Electromagnetic proportional valve 16 Electromagnetic proportional valve 17 Electromagnetic proportional valve 21 (HST ) Hydraulic Pump 22 (HST) Hydraulic Motor 30 Operating Unit 31 Non-Working Mode Switch 31a Road Running Switch 32 Working Mode Switch 32a Rough Raising Switch 32b Small Earth Switch 32c Substitution Switch 36 Hidden Switch 37 (Hidden Switch) Cover 40 Display Panel 50 Accelerator pedal 51 Brake pedal

 ────────────────────────────────────────────────── ─── Continued on the front page F term (reference) 2B041 AA07 AB05 AC03 2D015 HA00 3D040 AA10 AA22 AB08 AC36 AD05 AE17 AF07 AF16 3G065 BA04 CA22 DA13 EA10 FA06 GA29 GA46 JA04 JA09 JA11 JA14 KA03

Claims (8)

[Claims] 1. A switch operation of a work vehicle, comprising a work vehicle provided with a mode switch capable of selecting a work mode and a non-work mode, wherein a set value of the work mode can be arbitrarily changed. 2. A work vehicle comprising a mode switch capable of selecting a work mode or a non-work mode, wherein a running speed and a PTO rotation speed during work are determined simultaneously by selecting the mode switch. At
A switch operation of a work vehicle, wherein a set value of a vehicle speed gear ratio, an engine speed, and a PTO gear stage is configured to be changeable. 3. In the non-working mode, the PTO
3. The switch operation of a work vehicle according to claim 2, wherein a set value of a shift speed is configured to be changeable. 4. A set speed storage means for storing the set values of the vehicle speed ratio and the engine speed, and a PTO setting storage means for storing the set value of the PTO gear stage, each of which stores the changed set value. The switch operation of a work vehicle according to claim 2, wherein the switch operation is performed. 5. The work vehicle according to claim 4, wherein the set speed storage means and the PTO setting storage means are capable of recalling an initial value before the change of the set value even after the change of the set value. Switch operation. 6. An operation for operating a mode switch in a work vehicle which is provided with a mode switch capable of selecting a work mode or a non-work mode, and wherein a running speed and a PTO rotation speed are determined by selecting the mode switch. A switch operation of a work vehicle, wherein the unit is provided near a driver's seat. 7. The switch operation of a work vehicle according to claim 6, wherein a display panel for displaying an operation state by the mode switch is provided near a driver's seat. 8. The switch operation of a work vehicle according to claim 6, wherein the operation unit is provided with a hidden switch for changing a set value.