JPH0880863A - Steering operating device for traveling working machine - Google Patents

Abstract

PURPOSE: To provide a steering operating device for a working vehicle which can carry out the fine steering turning operation in simple and sure manners without being accompanied with the erroneous operation and danger. and can carry out work efficiently. CONSTITUTION: As for a steering operation device for a working vehicle, steering turn is performed by cutting-OFF only the clutches of the side clutch mechanisms 7 and 7a through the tilt operation in the first stage by selectively tilt-operating an operating lever 2 to both the sides from a neutral position, and the pivotal turn is carried out by operating the brake by the till operation in the second stage, and an operating switch 11 which carries out the steering turn by cutting only the side clutches is installed on the operating lever 2, and the operating switch 11 is connected with the driving device 82 for the side clutches 7 and 7a through a control part 10. When the operating switch 11 continues the ON operation, the control part 10 turning-ON- operates the actuators 82 for the side clutches 7 and 7a for a prescribed time t1 from the initial stage of the operation, and after the lapse of the prescribed time t1 , turning OFF operation is carried out for a set time t2 , and afterwards, turning-ON operation is carried out up to the turning-ON operation of the operating switch 11.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a traveling work in which a steering operation is carried out by operating a side clutch mechanism with an operation lever installed in a driving part of a working vehicle such as a combine or back for agricultural or construction machine. The present invention relates to a steering operation device for a machine.

[0002]

2. Description of the Related Art Conventionally, an operating lever for operating a side clutch mechanism in a work vehicle as described above is vertically installed on a driving portion and can be selectively tilted from its neutral position to the left and right sides. If you want to operate small amount, first
It is known that only the side clutch is disengaged to make a steering turn at the stage, and when a large operation is performed, a brake is operated at the second stage to make a solid turn.

In addition, it is difficult to adjust the tilting stroke of the lever by operating the lever as described above, and when making a minute turn, the operating lever is tilted too much and the side clutch is disengaged for a long time, or careless braking is performed. There is a problem such as turning the aircraft greatly. In consideration of such a point, a switch for operating the side clutch mechanism is provided on the upper portion of a lever for raising and lowering a working machine such as a reaping unit, and the steering operation is performed by selectively turning the switch on and off. Japanese Patent Application Laid-Open No. 62-208204 proposes a steering operation device for easily performing the operation.

[0004]

However, in the device described in the above publication, the side clutch of the side clutch mechanism is disengaged or added in addition to the time during which the operation switch is pushed in either the left or right direction. This is to brake the brakes, and in this respect it is no different from the steering operation method using the former operation lever.

Therefore, it is difficult to manually and accurately adjust the pushing time at the time of harvesting work by a combine, which often requires a minute turning operation. If it is continued for too long, the side clutch mechanism may be disengaged for a long time to make a large swing of the machine body. In this case, there was a problem in operability such as disturbing the mowing work. Further, there is a problem in that the manual operation of the minute switch operation as described above requires skill, the work is complicated, and the efficiency is lowered.

[0006]

SUMMARY OF THE INVENTION In order to solve the above problems, the present invention provides an operation lever 2 installed on a driving portion 3 of a work vehicle 1 by selectively tilting the operating lever 2 from a neutral position to both sides. With the first tilting operation, the side clutch mechanism 7,
Disengage only the 7a clutch to turn and steer,
In a steering operation device for a work vehicle configured to brake a brake by a second-stage tilting operation to make a turning turn, an operation switch 11 for turning and turning only a side clutch is attached to the operation lever 2. The operation switch 11 is attached to the side clutch mechanism 7, 7 via the control unit 10.
When the operation switch 11 is continuously turned on, the control unit 10 is connected to the drive devices 82, 82a of the side a for a predetermined time [t ₁ ] from the initial operation of the side clutch mechanisms 7, 7a. ON for a predetermined time [t
₁ ) After the lapse of time, the switch is turned off for a set time [t ₂ ] and then turned on until the ON operation time of the operation switch 11.

[0007]

[Operation] Since the side clutch can be disengaged for a predetermined time [t ₁ ] at the initial stage when the operation switch 10 is turned on, a small turning of the body can be easily carried out without error, and if necessary. Since the side clutch can be continuously disengaged, a large turn can be easily performed.

[0008]

[Examples] Hereinafter, description will be given with reference to the drawings. FIG. 1 shows an operation circuit of a steering operation device in a combine 1 as an example of a work vehicle according to the present invention. Reference numeral 3 denotes an operation unit in which an operation lever 2 and a travel speed change lever 2a are installed.
Is a transmission case that is drive-transmitted from the engine 5 via a continuously variable transmission pulley mechanism or the like, and in this transmission case 4, a forward / reverse transmission mechanism 4 operated by the traveling speed change lever 2a.
a, and a side clutch mechanism 7, which has a well-known side clutch and a brake for intermittently transmitting and transmitting the power transmission to the drive sprockets 6 and 6 of the left and right crawler traveling devices (not shown) by the left and right movements of the operating lever 2, 7a are provided.

Reference numeral 8 denotes a reaping section which is provided in front of the fuselage of the combine 1 so as to be able to move up and down by selectively turning on a switch (not shown) by operating the operating lever 2 back and forth. 8a, 8a is provided with a direction sensor 80 composed of a known mechanism in which a touch piece 81 is rotatably projected in the mowing, and is connected to a control unit 10 containing a microcomputer via a harness circuit. In response to a command from the control unit 10, the left and right solenoid pins (not shown) are actuated to detect the power of the drive sprockets 6 and 6 by connecting and disconnecting the corresponding side clutches 7 and 7a. I'm trying to intermittently.

When the operating lever 2 is operated to the left or right, the switch 9a or 9b is turned on and the control unit 10 forcibly switches the hydraulic valve 2b to give priority to the steering operation of the direction sensor 80 and the hydraulic cylinder. Drive device 82,8
2 is operated to switch the side clutches 7 and 7a to enable steering operation. Further, the side clutch mechanism 7,
When the operation lever 2 is selectively operated from the neutral position to either the left or right side, when the operation lever 2 is slightly tilted due to the tilt amount, the side clutch 7a is provided at the first stage as described above. When 7a is cut and further tilted, the brakes are connected to the second stage, and the operation lever 2 and the left and right brakes may be mechanically connected. , The second operation position of the operation lever is electrically detected, the electromagnetic switching valve is switched based on a command from the control unit 10, and a hydraulic cylinder (not shown) for brake operation is operated.

By pressing the operation switches 11a and 11b, the side clutches of the corresponding side clutch mechanisms 7 and 7a are operated via the control unit 10 as shown in the flow chart of FIG. 5, and the time chart of FIG. As shown in (3), the fine turning is performed by disconnecting and connecting for a predetermined time. That is, as shown in FIG. 4, when the left or right operation switch 11a is pushed for [t] seconds and turned on, the timer 12 is activated to turn on the steering valve 2b for a predetermined time [t ₁ ]. After that, it is turned off for a set time [t ₂ ] that is slightly longer than this, and after that, it is turned on for the time that the operation switch 11a is kept on.
I am trying to let you.

At this time, the time [t ₁ ] is set within a short time which is equal to or longer than the minimum time when the side clutches 7, 7a are actually disengaged. In the time [t ₁ + t ₂ ], when the operation switch is artificially operated, the side clutches 7 and 7a cannot be disengaged even if the switch operation is performed (for example, a phenomenon in which the side clutches 7 and 7a cannot be disengaged due to a failure of this clutch system). It is set within the time you can feel.

When the steering valve 2b is switched and operated as described above, the side clutches 7 and 7a receive a mechanical response delay time [t ₃ ] through the hydraulic cylinder 82.
After (approximately 0.05 seconds), the side clutch is actually disengaged and the power is disengaged for a short time of [t ₄ ] seconds, so that a minute turning in the operating direction can be permitted. .

The operator recognizes the minute turning of the machine body as described above, and the operation switch 11 is operated during the non-operation time [t ₂ ].
When the pushing movement of a or 11b is released, the side clutch (side clutch mechanism 7, 7a) is connected to the original state, so that the vehicle can travel straight again. In the harvesting work for harvesting the grain stalks to be planted in the field along the row with the combine equipped with the steering operation device configured as described above, the operator desires to slightly orbit the aircraft to correct the trajectory. By simply pressing the direction operation switch 11a or 11b, the minimum turning can be surely performed.

Therefore, it is not necessary to use special nerves for the operation switch pushing time and its extent, and good cutting work is possible without causing problems such as poor cutting due to careless large turning of the machine body. Operation switch 1
It can be efficiently and easily performed by a simple operation of simply turning on 1a and 11b. When turning the machine body at the end of the field, the machine body can be largely rotated in a short time by tilting the operation lever 2 left and right, and the operation switches 11a and 11b can be moved to the head of the operation lever 2. By providing the switch in the above, it is possible to immediately select the turning form of them without the need to change the hand.

[0016]

According to the present invention, there is provided a steering operation device for a work vehicle, wherein the operation lever 2 installed in the operating portion 3 of the work vehicle 1 is selectively tilted from the neutral position to both sides thereof. In the traveling work machine configured to turn the steering by turning only the clutch of the side clutch mechanism 7 or 7a by the tilting operation of the second step, and by operating the brake by the second tilting operation. In the steering operation device, an operation switch 11 is attached to the operation lever 2 to disengage only the side clutch to make a steering turn.
1 is connected to the drive devices 82, 82 of the side clutches 7, 7a via the control unit 10. When the operation switch 11 is continuously turned on, the control unit 10 keeps a predetermined time [t ₁ ] from the initial operation. The drive device 82 of the side clutch mechanism 7, 7a is turned on, and after the predetermined time [t ₁ ] has passed, it is turned off for a set time [t ₂ ] and thereafter it is turned on until the operation time of the operation switch 11. Is configured.

Therefore, the operation switch 11 (11a, 11
Since a minute turning can be reliably and easily performed without error by a simple operation of simply turning on b), accurate traveling work can be performed efficiently. Further, since the fine turning can be performed without paying special attention to the ON operation of the operation switch 11, it is possible to reduce the operator's fatigue without requiring skill.

[Brief description of drawings]

FIG. 1 is a plan view showing an operating mechanism of a combine and a circuit thereof.

FIG. 2 is a plan view of a driving unit.

FIG. 3 is a circuit diagram of an operation switch.

FIG. 4 is a time chart showing the operation of the operation switch and the side clutch mechanism.

FIG. 5 is a flowchart showing the operation of the operation switch.

[Explanation of symbols]

1 Work Vehicle 2 Operation Lever 3 Driving Section 10 Control Section (Microcomputer) 11 Operation Switch 82 Actuator (Hydraulic Cylinder)

Claims (1)

[Claims] 1. The side clutch mechanism 7, 7a is tilted in the first stage by selectively tilting the operating lever 2 installed in the operating unit 3 of the traveling work machine 1 from the neutral position to both sides. In the steering operation device for a working vehicle, which is configured to disengage only the clutch to turn and turn, and to turn the brake by the tilting operation in the second step to perform a turning turn. An operation switch 11 for turning the steering wheel to turn the steering wheel is provided. The operation switch 11 is provided with the side clutch mechanism 7, 7 via the control unit 10.
are interlocking to a driving device 82, the control unit 10 when the operation switch 11 is continued to ON operated, the operation from the initial predetermined time t ₁ is the side clutch mechanism 7,7a
The driving operation device of the traveling work machine configured to turn on the driving device 82, turn off the set time t ₂ after the predetermined time t _{1 has} passed, and turn on until the ON operation time of the operation switch 11 thereafter. .