JPS6317414B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention provides a traveling control system that can adjust the workload to approach a set value by automatically decreasing or increasing the traveling speed of the aircraft by means of a traveling device in accordance with increases or decreases in the workload. A mechanism is provided, and an interlocking mechanism is provided for synchronizing and interlocking an operating mechanism for operating the raising and reaping section and the aircraft traveling device, and the interlocking mechanism is configured to switch the synchronization interlocking ratio to a plurality of stages. The present invention relates to a combine harvester in which the operating speed of the pulling and reaping section relative to the traveling device can be switched between high speed and low speed. Considering the reaping and harvesting work using this type of combine harvester, when the planted grain culm is in the erect state, the operating speed of the raising and reaping section is maintained within an appropriate range, and the machine's advancing speed is adjusted to the working speed. It is desirable for work efficiency to increase the load as quickly as possible within the range that maintains the load within the set allowable range, and if the planted grain culm is in a lodging state, this lodging grain culm should be reliably raised. Therefore, it is necessary to slow down the machine's advancing speed while maintaining the operating speed of the pulling and reaping section within an appropriate range. However, as described above, the operating speed of the pulling reaping section is automatically controlled to decrease or increase in accordance with changes in the work load in synchronization with the aircraft traveling system.
In particular, during harvesting of a fallen grain culm, which is carried out with the operation speed of the lifting reaping section switched to a high speed range, the operation speed may be changed depending on factors such as the planting density of the grain culm, the moisture level, and the length of grain set. When the work load decreases, the lifting and reaping section is driven at an unreasonable high speed in synchronization with the machine running system which is controlled to increase speed based on this, resulting in breakage of planted grain culms and shedding. This caused the inconvenience that the intended raising and reaping work could not be carried out. In view of the above-mentioned circumstances, it is an object of the present invention to not only solve the above-mentioned inconveniences that arise when harvesting a lodging grain culm, but also to make it possible to perform the operation reliably and easily. have a purpose. A characteristic configuration of the present invention for achieving the above object is to automatically reduce or increase the aircraft traveling speed by the aircraft traveling device in response to changes in the workload, so as to adjust the workload to approach a set value. and an interlocking mechanism for synchronously interlocking an operating mechanism for operating the pulling and reaping section and the aircraft traveling device, and for switching the synchronization interlocking ratio by the interlocking mechanism into a plurality of stages. , in a combine harvester configured to be able to freely switch the operating speed of the hoisting and reaping section relative to the machine traveling device between high and low speeds, a guide plate that guides the operating direction of a lever for switching the operating speed of the hoisting and reaping section; ,
A first operation guide groove that allows the synchronized interlocking speed to be changed when the operating speed of the pulling and reaping section is low, and a second operation that allows changing the synchronized interlocking speed when the operating speed of the hoisting and reaping section is high. a guide groove formed in the second operation guide groove, and detecting that the lever is in the second guide groove, and controlling the traveling speed by the traveling control mechanism based on an increase or decrease in the work load. The point is that a control stop mechanism is provided to stop the operation. As a result, the operating speed of the pulling reaping section is switched to a high speed range, that is, the lever is in the second position.
When it is in the operation guide groove, the control stop mechanism stops the operation of the travel control mechanism.
The raising and reaping work is carried out at a high speed compared to the machine running speed, that is, the machine running speed is kept sufficiently slow and only the reaping work speed is relatively fast to raise grain culms with a large degree of lodging. Even if the work can be carried out well, and the work load is temporarily reduced due to factors such as the planting density of the grain culm or the moisture level, the reaping unit will not be driven at an unreasonable high speed as mentioned above. It is possible to raise the lodging grain culm reliably and well without the risk of breaking the lodging grain culm, shedding the grain, or trampling it down. In addition, the operation of the travel control mechanism is automatically and reversibly stopped by switching the operating speed of the lifting reaping section to a high speed range, which is an essential operation during harvesting of fallen grain culms. Therefore, there is no need to forget to operate the travel control mechanism as would be the case when the travel control mechanism is deactivated by a separate operation, and the operation of activating and deactivating the travel control mechanism can be performed reliably and easily. In addition, if a single lever is used for switching the operating speed of the hoisting reaping section and changing the machine's advancing speed, the operating speed switching operation of the hoisting reaping section and the change of the machine's advancing speed may be performed. operation and
This has the advantage that it can be performed rationally and reliably by one-touch operation on one lever. Embodiments of the present invention will be described below based on the drawings. FIG. 1 shows a combine harvester, in which an engine E and a threshing device 3 are mounted on a machine frame 2 having a crawler-type traveling device 1, and a pulling device 4 and a clipper-type reaping device are mounted in front of the machine frame 2. 5 and a lifting reaping section 7 comprising a vertical conveying device 6 for gradually changing the posture of the harvested grain culm to a sideways posture while conveying and supplying it to the threshing device 3. In such a combine harvester, the
As shown in the figure, from the engine E to the traveling device 1
an operating mechanism 8 that can freely switch the operating speed of the traveling transmission case M that controls the drive of the drive mechanism M and the raising and reaping section 7 to high or low speeds;
A hydraulic continuously variable transmission mechanism 9 that synchronizes the operating speed of the pulling and reaping section 7 with the operating speed of the traveling device 1 and continuously changes the speed is installed in the middle of the transmission system to reduce the threshing load. A traveling control mechanism 10 that automatically decreases or increases the machine traveling speed according to the increase or decrease change, and when the operating speed of the raising and reaping section 7 is set to a high speed range and the operating mechanism 8 is switched to a high speed state, the traveling A control stop mechanism 11 that automatically and reversibly stops the operation of the control mechanism 10 is provided. Also, one operating lever 12 provided in the control section and a speed change operating arm 9A of the hydraulic continuously variable transmission mechanism 9 are provided.
are linked together via a link mechanism 13, and the operating lever 12 and the shift actuation arm 8A of the actuation mechanism 8 are linked via a wire 14,
This single operating lever 12 serves both as a lever for changing the machine's advancing speed and as a lever for switching the operating speed of the raising and reaping section 7 . The operation guide plate 15 for the operation lever 12 has a guide plate 15 for guiding the swinging operation of the lever 12 to the first forward speed change operation area _F1 and the reverse speed change operation area R when the pulling reaping section 7 is in a low speed range. A second operation guide guides the swinging operation of the lever 12 from the shift neutral position N to the second forward shift operation range _F2 when the reaping section 7 is in the high speed range. The groove 16B and the third operation guide groove 16C, which guides the switching operation of the actuation mechanism 8 between the high speed state and the low speed state by the lever 12, are formed in a substantially h-shape when viewed from above. The travel control mechanism 10 is configured as follows. That is, a first detector 1 is installed on a rotational support shaft 3a of a handling cylinder 3A that is mounted in the handling chamber of the threshing device 3 to detect torque fluctuations of this rotational support shaft 3a as a threshing load.
7, and a second detector 20 that detects the rotational speed of the input shaft of the traveling transmission case M as the actual aircraft advancing speed.
The detection results of both detectors 17 and 20 are input to the controller 21, and the controller 2
A friction mechanism 19 connects the electric motor 18, which is controlled in forward and reverse directions by
The hydraulic stepless control is linked via the hydraulic control system so that, in accordance with increases and decreases in the detected threshing load, the actual machine advancing speed becomes a preset machine advancing speed in inverse proportion to the threshing load. The speed change mechanism 9 is configured to perform speed reduction/increase control. The control stop mechanism 11 includes the control lever 12
is in the second operation guide groove 16B, the switch actuation piece 22 protruding into the second operation guide groove 16B is turned off by retiring movement, and the operation lever 12 is in the second operation guide groove 16B. Groove 16B
The controller 21 in the traveling control mechanism 10 controls the relay contact 23a of the switch 23, which is automatically turned on as the switch actuating piece 22 protrudes when the switch is operated into the other operation guide grooves 16A, 16C. It is installed in the power supply circuit. In addition, 24 in the figure is a main switch interposed in the power supply circuit of the controller 21. Also, the operating speed of the pulling reaping section 7 when the operating lever 12 is operated to the highest speed operation position in the first forward speed change operation range F ₁ and the second forward speed change operation range F ₂
The operating speed of the raising and reaping section 7 is set to be equal to that when the operating speed is set to the lowest speed operating position. Furthermore, as shown by the imaginary line in FIG.
The operation lever 12 is located in the middle of the operation guide groove 16C.
is switched to the OFF state when the switch is operated along the third operation guide groove 16C toward the second operation guide groove 16B, and conversely, when the switch is operated along the third operation guide groove 16C toward the first operation guide groove 16A. The switch 23 of the control/stop mechanism 11 may be provided with a switch operating piece 23A made of a leaf spring that is turned on when operated. Incidentally, although reference numerals are written in the claims section for convenient comparison with the drawings, the present invention is not limited to the structure shown in the accompanying drawings.

[Brief explanation of the drawing]

The drawings show an embodiment of the combine harvester according to the present invention, with FIG. 1 being an overall side view, FIG. 2 being a perspective view of the main parts, and FIG. 3 being a plan view of the main parts. DESCRIPTION OF SYMBOLS 1... Airframe traveling device, 7 ... Pull-up reaping part, 8... Actuation mechanism, 9... Synchronization interlocking mechanism, 10... Travel control mechanism, 11... Control stop mechanism, 12... Lever, 16...
Guide plate, 16A...first operation guide groove, 16B...second
Operation guide groove.

Claims (1)

[Claims] 1. A travel control mechanism 10 is provided that can automatically increase or decrease the aircraft traveling speed by the aircraft traveling device 1 in accordance with increases and decreases in the work load, and adjust the work load to a set value. Part 2
An interlocking mechanism 9 is provided that synchronizes the operating mechanism 8 that operates the aircraft traveling system 1, and the synchronizing ratio of the synchronizing interlocking ratio by the interlocking mechanism 9 is switched to a plurality of stages. In a combine harvester in which the operating speed of the pulling reaping section 7 can be freely switched between high and low speeds, the guide plate 16 that guides the operating direction of the lever 12 for switching the operating speed of the lifting reaping section 7 is provided with the lifting section 7. A first operation guide groove 16A that allows the synchronized interlocking speed to be changed when the operating speed of the pulling reaping section 7 is low, and a second operation guide groove that allows the synchronized interlocking speed to be changed when the operating speed of the pulling reaping section 7 is high. and detects that the lever 12 is in the second operation guide groove 16B, and detects that the lever 12 is in the second operation guide groove 16B, and detects that the lever 12 is in the second operation guide groove 16B, and detects that the lever 12 is in the second operation guide groove 16B. 1. A combine harvester characterized in that a control stop mechanism 11 is provided for stopping control of traveling speed by the combine harvester 10.