JPS6120243B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention provides a hoisting device which is installed in the front part of the reaping device in a backward tilting position, and a reaped grain culm conveyor whose handling depth can be adjusted by vertical swinging at the rear of the hoisting device. The present invention relates to a combine harvester equipped with a device.

In this type of combine harvester, as described above, the amount of vertical swing of the conveying device disposed at the rear of the lifting device in the backward tilting position is restricted by the lifting device, and as a result, the amount of vertical swing of the conveying device is restricted by the lifting device. Since the range in which the handling depth can be adjusted by vertical swinging is also limited, in the case of ultra-long grain culms that exceed the adjustment range, even if the conveying device is adjusted to the maximum shallow handling direction, it will still not be handled deeply. Threshing was carried out in the same state, and as a result, the threshing load became excessive, leading to various problems.

The present invention aims to prevent excessive threshing loads that occur during reaping and threshing for ultra-long grain culms that exceed the handling depth adjustment range, as described above. In the device described above, a plurality of sensors are installed above the lifting device to detect grain culms having a length within a range in which the handling depth can be adjusted by vertically swinging the conveying device, and a sensor having a length exceeding the adjustable range. A sensor is installed to detect the grain culm.
The handling depth is maintained within a predetermined range by vertically adjusting the conveying device based on the culm length detection results of the plurality of sensors that detect the culm length of the grain culm near the standard length that is the adjustable range. In addition to configuring the
It is characterized by being configured to automatically and reversibly reduce the traveling speed of the aircraft based on the detection of grain culms by the ultra-long culm detection sensor that exceeds the adjustable range,
Its effects are as follows.

That is, in the case of the present invention, when a sensor installed above the lifting device detects a grain culm having a length that exceeds the range in which the handling depth can be adjusted by vertically swinging the conveying device, the machine body Threshing by automatically and reversibly reducing the running speed, or by artificially reducing the machine running speed based on a mechanism that displays the long grain culm detection result of the sensor. Since it is possible to reduce the threshing load by reducing the amount of grain culm supplied to the device per unit time, the ultra-long culm can be threshed while remaining deep at a predetermined handling depth. The threshing load that increases due to this can be offset by the load reduction, and an abnormal increase in the load can be suppressed. Therefore, regardless of the length of the grain culm, it has become possible to perform a good combine harvester operation while keeping the threshing load within the set allowable range.

Embodiments of the present invention will be described below with reference to the drawings. The engine E and the threshing device 3 are mounted on the top of a traveling machine frame 2 having a pair of left and right crawler traveling devices 1. The pulling device 4 and the clipper-type reaping device 5 are used to tilt the grain culm backward and upward, gradually changing the posture of the grain culm that has been cut in an almost vertical position to a sideways posture while conveying it to the threshing feed chain 3A. A reaping section 7 consisting of a reaped grain culm conveying device 6 and the like is provided, and the conveying device 6 is configured to be vertically swingable around a horizontal axis P near the conveying end portion thereof, and is connected to the engine E. In the middle of the transmission system between the transmission system and the transmission case M that controls the drive of the crawler traveling device 1, the aircraft traveling speed can be adjusted by changing the swash plate angle in conjunction with the swinging operation of the control lever 8 provided in the control section. A hydraulic continuously variable transmission device 9 that can adjust the speed is interposed.

Furthermore, three sensors 10 are installed on the back side of the lifting frame 4A of the lifting device 4 to detect the culm length of the planted grain culm raised along the lifting path A of the lifting device 4. The sensor 10 is provided with the grain culm contact lever 10a being raised and protruding toward the path A side and at an appropriate interval in the grain culm lifting and transferring direction, and between the conveying device 6 and the reaping frame 11. A hydraulic cylinder 12 is provided that expands and contracts based on the culm length detection result, and the conveying device 6 is moved around the horizontal axis P by the expansion and contraction operation of the hydraulic cylinder 12 based on the culm length detection result. By swinging up and down,
It is configured to automatically maintain the handling depth within a set handling depth.

A sensor 13 capable of detecting the culm length of a grain culm exceeding the range in which the handling depth can be adjusted by vertical swinging of the conveying device 6 is installed on the back side of the pulling frame 4A at a position above the sensor 10. , the grain-to-grain culm contact bar 13a is provided in a state that it is raised and protrudes toward the path A side, and the hydraulic continuously variable transmission 9 is automatically moved to the deceleration side based on the long grain culm detection result of the sensor 13. Reversible control mechanism 14
has been established.

The mechanism 14 includes a swing link 15 in a link operation mechanism 15 interposed between the operation lever 8 and the swash plate angle changing lever 9A of the hydraulic continuously variable transmission 9.
At A, there is a friction plate 14B which allows a motor 14A which can be switched between forward and reverse directions to operate the swash plate angle changing lever 9A to the speed increasing side and the decelerating side via this link operating mechanism 15, but which allows manual operation using the operating lever 8.
The sensor 13
A controller 14C is provided to output a control signal to the motor 14A to automatically and reversibly operate the swash plate angle changing lever 9A to the deceleration side based on the long grain culm detection result. .

[Brief explanation of the drawing]

The drawings show an embodiment of a combine harvester according to the present invention, and FIG. 1 is a side view of the main parts, and FIG. 2 is a control system diagram of the main parts. 4... Pulling device, 5... Reaping device, 6... Reaped grain culm conveying device, 10, 13... Sensor, 14
...desired mechanism.

Claims (1)

[Claims] 1. A lifting device 4 is provided at the front of the reaping device 5 in a backward tilted position, and a harvested grain culm conveying device 6 whose handling depth can be adjusted by vertical swinging is provided at the rear of this lifting device 4. In the combine harvester, a plurality of sensors 10 are arranged above the pulling device 4 to detect the culm length of the grain culm within a range in which the handling depth can be adjusted by vertically swinging the conveying device 6. Sensor 1 for detecting a grain culm with a length exceeding the adjustable range
3, and the conveying device 6 is vertically oscillated and adjusted based on the culm length detection results of the plurality of sensors 10 for detecting the culm length of the grain culm near the standard length that is the adjustable range. It is configured to maintain the handling depth within a predetermined range, and to automatically and reversibly reduce the machine running speed based on the detection of grain culms by the ultra-long culm detection sensor 13 that exceeds the adjustable range. A combine harvester characterized by: