JPS6348484B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an operation structure for a work vehicle in which a drive mechanism for operating a target device is configured to be capable of automatic control operation and manual operation. The object is to operate intermittently at operating speeds suitable for both control operations and manual operations.

Embodiments of the present invention will be described in detail below with reference to illustrative drawings.

As shown in Fig. 1, a pair of left and right traveling crawlers 1a, 1b, a threshing device 3, an engine 4, etc. that handles and handles the stem culm while holding and transporting it with a feed chain 2 built on the left side. At the front of this machine, there are a device 5 for pulling up multiple stem culms planted in the field, a cutting blade 6 for cutting the base of the pulled stem culms, and an auxiliary conveyance device 7 for merging the cut stem culms. , a reaping processing unit is provided which includes a rear conveyance device 8 that conveys the merged stem culm rearward, changes it to a sideways posture at the end of conveyance, and delivers it to the threshing feed chain 2, and as it progresses, The structure is such that the threshing process is performed automatically and continuously.

As shown in FIG. 2, inside the traveling transmission case 9, the left and right traveling crawlers 1a, 1b can be separately driven on and off, and the crawlers 1a, 1b are in a cut-off state.
A pair of steering clutch brakes 1 capable of braking 1b
0a and 10b as their respective swing operating arms 11
When a, 11b is swung from the return oscillation position a, b to the first oscillation position a, b, the clutch is in the disengaged state, and when it is subsequently oscillated to the second oscillation position a, b. A pair of hydraulic cylinders 12a and 12b are provided to be switched to a braking state and swing the arms 11a and 11b separately, and as shown in FIG. A pair of left and right stem culm contact sensors 13a, 13b for detecting rightward and leftward deviations of the machine body with respect to the target stem culm row are pivoted so as to be swingable back and forth around vertical axes a and b. And, it is provided in a state where it is biased to return to the posture along the width direction of the machine body, and when the machine body is laterally displaced to the right by more than a set allowable range with respect to the row of stalks to be reaped, it presses against the left sensor 13a. Normally closed sensor switch 14a for left turning
When the machine body is laterally displaced to the left by more than a set allowable range with respect to the row of stem culms to be harvested, the right sensor 13b
A normally closed sensor switch 14b for turning to the right is provided, which is operated by pressing the switch 14b, and a manual switch 15a for turning to the left and a manual switch 15b for turning to the right are further provided, as shown in FIG. Both sensor switches 14a, 14b and both manual switches 15a, 15b are connected to both hydraulic cylinders 12a, 15b.
For the excitation part 16a for left turning operation and the excitation part 16b for right turning operation in the control valve 16 of 12b,
The hydraulic cylinders 12a, 12b are connected to the sensor switches 14a, 14b so as to be operable as described below, and the hydraulic cylinders 12a, 12b are connected to the sensor switches 14a, 14b so as to maintain the horizontal deviation of the machine body with respect to the culm to be harvested within the set allowable range.
The hydraulic cylinders 12a and 12b are configured to be automatically telescopically operated based on the commands from the manual switches 15a and 15b, and the hydraulic cylinders 12a and 12b are telescopically operated based on the commands from the manual switches 15a and 15b so as to rotate the aircraft arbitrarily. It is structured as follows.

To configure the operating structure of both hydraulic cylinders 12a, 12b, as shown in FIG. One pulse signal generation circuit 18 is provided which generates a high signal generation time shorter than a low signal generation time. Then, both the relays 17a and 17b are turned off, and the sensor switches 14a and 14b and the pulse signal generation circuit 18 are turned off, and the pulse signal generation circuit 18 generates a high signal. connected through a pair of AND circuits 19a and 19b that are turned on only when the
Both relays 17a, 17b are connected to both manual switches 15a, 15b, and pulse signal generating circuit 18, respectively, to both switches 15a, 15b.
Each is in the off state and the pulse signal generation circuit 1
8 is connected through a pair of AND circuits 20a and 20b that are turned on only when the signal is in a low signal generation state, and the hydraulic cylinders 12a and 12b are connected to the pulse signal generation circuit based on commands from the sensor switches 14a and 14b. 18, the hydraulic cylinders 12a, 12b are operated intermittently in the activated state, and the hydraulic cylinders 12a, 12b are activated based on the commands from the manual switches 15a, 15b. It is configured to operate intermittently in the activated state.

In addition, as shown in Fig. 4, the sensor switch 1
Relays 17a, 17 based on commands 4a, 14b
A switch 21 is provided to enable and disable the operation of the sensor switches 14a and 14b, so that the steering operation based on the commands from the sensor switches 14a and 14b can be stopped when driving on a headland or on the road. It is structured as follows.

Further, as shown in FIG. 2, the pair of steering operation levers 22a, 22b are connected to the respective swing operation arms 11a, 11b through long holes 23a, 2.
3b, the cylinders 12a and 12b are linked together in a closed state with flexibility to allow operation of the cylinders 12a and 12b;
The pair of hydraulic cylinders 12a and 12b are connected to the operating arms 11 by the operating levers 22a and 22b, respectively, to the operating arms 11a and 11b.
a, 11b are abutted and connected to allow operation,
In addition, the steering levers 22a and 22b are configured so that the steering clutch brakes 10a and 10b can be operated continuously.

In addition, in the embodiment, the sensor switch 14
The swing operation arm 11 is operated based on the commands of a and 14b.
When operating the clutches a and 11b, it is possible to select between a mode in which the clutches are oscillated to the clutch disengaged state and a mode in which they are oscillated to the braking state, depending on the time setting of the pulse signal.

Furthermore, in carrying out the present invention, the drive mechanism for operating the target device may include various mechanisms such as an electric motor, in addition to the one equipped with the fluid pressure actuators 12a, 12b and their electromagnetic control 16 as described in the embodiment. be.

In addition, as a discrimination operation mechanism, the one described in the example
In addition to using the AND circuits 19a, various other configurations are possible.

Further, the present invention can be used to operate a device for adjusting the cutting height or a device for adjusting the cutting depth in a combine harvester, or to operate various devices attached to an agricultural tractor or a civil engineering construction machine. It is something that can be done.

In summary, the present invention provides one pulse signal generation circuit 18 that generates pulse signals with different high signal generation times and low signal generation times in the operating structure of the work vehicle described above, and provides commands for the automatic control operation system. Based on this, the drive mechanisms 12a, 12b, 16 are operated intermittently in a state in which the pulse signal generating circuit 18 is activated for a short time during which the signal is generated, and the drive mechanisms 12a, 12b, 16 are operated intermittently based on the instructions from the human operation system. The present invention is characterized in that it is provided with a discrimination operation mechanism that intermittently operates 12b and 16 while the pulse signal generating circuit 18 is in operation for a long period of time when the signal is generated.

That is, the drive mechanisms 12a, 12b, 16 are
Since the operating speed during automatic control operation is slower than the operating speed during manual operation, there is a risk of hunting occurring when high-speed operation is performed during automatic control. While avoiding such inconveniences, the drive mechanism 12 can be operated accurately at a desired high speed during manual operation.
Since the drive mechanisms 12a, 12b, and 16 are operated intermittently, stopping the operation causes less unpleasant vibration than when the drive mechanisms 12a, 12b, and 16 are simply operated continuously. It can be done with. Moreover, in particular according to the invention, the drive mechanisms 12a, 12b, 16
When the operating speed is set as described above and the operation is performed intermittently, one pulse signal is generated when the pulse signal generation time and the low signal generation time are different, making effective use of this fact. Since only the generating circuit 18 is used to operate in the desired state, for example, a pulse signal generating circuit for automatic control operation and a pulse signal generating circuit for manual operation may be provided separately. Compared to the conventional method, one pulse signal generation circuit 18 can be used for both automatic control operation and manual operation, and can be implemented with a low cost and simple structure, which has a great practical advantage when using a work vehicle. The operating structure was obtained.

[Brief explanation of the drawing]

The drawings illustrate an embodiment of the operation structure for a working vehicle according to the present invention, with FIG. 1 being a side view of the front part of the combine harvester, and FIG. 2 being a diagram of the relationship between the steering clutch brake, the hydraulic cylinder, and the steering operating tool. , FIG. 3 is a plan view showing the attachment part of the stem culm contact sensor, and FIG. 4 is an electric circuit diagram. 12a, 12b...fluid pressure actuator, 1
6...Solenoid control valve, 18...Pulse signal generation circuit.

Claims (1)

[Claims] 1. Drive mechanism 12a, 12b, 1 for operating target device
6 is an operation structure for a work vehicle configured to be capable of automatic control operation and manual operation, and is provided with one pulse signal generation circuit 18 that generates pulse signals in different states in high signal generation time and low signal generation time. , the drive mechanism 12 based on a command from an automatic control operation system.
a, 12b, 16 as the pulse signal generating circuit 18
The pulse signal generation circuit 18 operates the drive mechanisms 12a, 12b, and 16 intermittently in a state in which the pulse signal generation circuit 18 generates a long-time signal by intermittently operating the short-time signal. An operation structure for a work vehicle, characterized in that it is provided with a discrimination operation mechanism that operates intermittently in a state where it is operated for a certain period of time. 2. Configuring the drive mechanism for operating the target device,
The operation structure for a work vehicle according to claim 1, characterized in that fluid pressure actuators 12a, 12b and an electromagnetic control valve 16 thereof are provided.