JPH0558688B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (a) Field of Industrial Application The present invention relates to an automatic control device for a combine harvester that reaps and threshes grain culms.

(b) Prior art Conventionally, the load on operating parts such as a traveling device, pre-processing device, and threshing device is detected by the engine load to control the traveling speed, thereby adjusting the amount of harvested grain culm supplied to the threshing device. Automatic control devices for combined harvesters are already known.

(C) Problems to be Solved by the Invention Since the above-mentioned known automatic control device only controls the reaping speed of grain culms by detecting the engine load and adjusting the vehicle speed, the performance of sorting by drying and wetting of grain culms is poor. I couldn't deal with whether it was good or bad.

In other words, when a lodging grain culm or a grain culm with water droplets such as dew is threshed and sorted under conditions suitable for threshing and sorting grains from dry grain culms with the rotational speed of the winnowing machine, oscillating sorter, second thrower, etc., the grains are separated. , straw culms, leaves, etc. have a large amount of adhering water or water content, and their specific gravity is large and they tend to adhere to each other, resulting in a marked decline in wind-selection performance, and furthermore, the amount of secondary materials increases and Since it easily adheres, there were problems such as clogging of the No. 2 thrower.

(d) Means for Solving the Problems The present invention provides a combine harvester in which engine power is distributed to a traveling device and a threshing device via transmission devices, respectively, and a load sensor that detects the load on an operating part. The detected value and the detected value of the moisture sensor installed in the grain flow section are input to the control unit and compared with the respective set values. If the detected moisture value is smaller than the set value, the traveling speed is lower than the load detection value. The control is configured to be inversely proportional to the moisture detection value, and when the moisture detection value is larger than the set value, the traveling speed is inversely proportional to the load detection value and the rotation speed of the threshing section is controlled to be proportional to the moisture detection value. The above-mentioned problems have been solved by making it possible to carry out good sorting even when the moisture content of threshing grains changes while working under an appropriate load.

(E) Action Grain culms harvested and transported by the pre-processing device are threshed by the threshing device, and the generated threshed grains are subjected to wind sorting while being oscillatedly transferred by the oscillating sorting body in the sorting air path composed of a winnowing machine. The first grains are carried out of the machine and stored or packed in bags by a paddy processing device, and the second grains are returned to the swinging sorter or handling room by a second thrower.

During the above-mentioned reaping and threshing work, the load sensor attached to the engine driving the traveling device, pre-processing device, and threshing device detects the load by detecting the temperature of the exhaust gas, and the load is detected by detecting the temperature of the exhaust gas. The moisture sensor attached to the flow path continuously detects the moisture in the flowing grains, and the control unit compares this moisture value with the load detection value and each set value, and the moisture detection value is determined based on the comparison result. If is smaller than the set value, the control unit outputs a travel control signal that is inversely proportional to the detected value to control the travel device,
a control signal that causes the rotation of the threshing section to be proportional to the moisture detection value when the moisture detection value is greater than the set value;
A control signal whose traveling speed is inversely proportional to the detected load value is output to automatically control the traveling transmission and the threshing transmission.

(F) Example An example of the present invention will be explained with reference to the drawings.
1 is a machine base 3 having a traveling device 2 consisting of a crawler;
It is a threshing device mounted on one side of the top, and a pre-processing device 5 consisting of a reaping device 4 and a grain culm conveying device is attached to the front so that it can be raised and lowered, and a cutter or binding device or a binding device is attached to the rear. A waste straw processing device such as a concentrating device is installed, and on the other side of the machine base 3, in order from the front, there is an operation panel 6, a driver's seat 7, and a layer of fried grain rising from the end of the most transfer spiral of the threshing device 1. A paddy processing section is provided which includes a cylinder 8, a hopper 9 attached to the upper part of the cylinder 8, a bag hanging rod 10, and the like.

Further, an engine 11 is provided below the cockpit 7, and the power of this engine 11 is distributed to the preprocessing device 5, the traveling device 2, and the threshing section input shaft 12 as shown in FIG. The power to the device 2 is transmitted to the transmission case 15 via a split-pulley type continuously variable transmission 14 having a speed change cam 13, and the speed change cam 13 is rotated by a vehicle speed change motor 16 to adjust the groove width of the split pulley. The transmission is continuously variable by expanding and contracting the gear, and since it is connected via a rod to the manual gear shift lever 17 provided in the control section, the gear can also be rotated manually, and the front and rear of the manual gear shift lever 17 are A high speed sensor 18 and a minimum speed sensor 19 are provided.

Although the threshing unit input shaft 12 is not shown, in the middle thereof, as in the conventional one, there are the handling trunk shaft of the threshing device 1, the swing sorting body, the first transfer spiral, the grain lifting spiral in the grain lifting cylinder 8, Drives the waste straw transport device and waste straw processing device,
The shaft of the suction winnower 20 is driven by the threshing section input shaft 12 via a continuously variable transmission device 22 whose groove width is expanded and contracted by a speed change cam 21, and the shaft of the suction winnower 20 is connected to the second transfer spiral 23 and its transfer end. The speed change cam 21 is rotated by the threshing speed change motor 25, which drives the shaft of the provided second thrower 23a and the shaft of the blower winnow 24 provided at the lower part of the starting end of the handling chamber.

Furthermore, the engine 11 is equipped with a load sensor 26 for detecting the temperature of its exhaust gas, and the hopper 9 has a valve plate 28 that is rotated back and forth by a switching lever 27 as shown in FIGS. 1 and 2. Moisture sensors 29, 29 are attached to the lower part of the moisture sensor 29, and the moisture sensor 29 is capable of continuous detection without crushing the grains.For example, a pick-up device is installed in the grain flow passage. The moisture content of the grains passing over the pick-up device is measured using a high-frequency moisture meter, or as shown in Figs. There is a method of detecting the moisture absorbed by paper using a paper moisture meter, and in this method, the switching lever 27 switches the valve plate 28 to alternately dry the paper.

In the above-mentioned combine harvester, when grains are harvested and transported by the pre-processing device and threshed by the threshing device 1, the threshed grains generated in the handling chamber and falling onto the oscillating sorter are transferred to the blower winnower 24 while being oscillatedly transferred. and suction winch 2
The first grain falls into the first receiving gutter in the first sorting section and is carried out of the machine by the first transfer spiral, and this carried out grain is The grain is lifted by the lifting tube 8 and put into the hopper 9, and as it flows down toward the paddy bag 30, the moisture is measured by the moisture sensor 29 (or high frequency moisture meter), and the measured value is converted into voltage. Ru.

In addition, the threshed grains transferred from the first sorting section to the second sorting section are sorted at the second sorting section, and the second grains are transferred to the second transfer spiral 23.
After that, the straw waste is returned to the handling chamber or the starting end side of the swing sorting body by the second thrower, and the straw waste is discharged outside the machine from the suction winnower 20 or the dust outlet.

During such reaping and threshing work, the load sensor 26 detects the load on the engine 11 by measuring the temperature of exhaust gas from the engine 11, and the temperature is converted into voltage.

The detection value of the threshing potentiometer 31 attached to the shaft of the suction winnower 20, the detection value of the potentiometer 32 attached to the traveling transmission part, the detection value of the moisture sensor 29, and the detection value of the load sensor 26 are the sixth Microcomputer 33 as shown in the figure
(1 chip microcomputer), and the microcomputer 3
3 outputs a control signal to each of the variable speed motors 16 and 25.

Next, the control of vehicle speed and threshing rotation speed based on the various detected values will be explained with reference to FIGS. The moisture content when no dew is attached is the set value X (%), the threshing rotation speed at that time is A (constant), the measured moisture value is the detected value S, and the upper limit of the engine proper load detected by the load sensor 26 is Let the value be B (constant) and the lower limit value be C (constant), and use these as the set value of the load.

When the detected value S of the moisture sensor 29 is smaller than the set value X and the detected value H of the load sensor 26 is smaller than the lower limit C, the microcomputer 33 sends a speed increase signal to the vehicle speed change motor 16. Since the vehicle speed change motor 16 rotates the speed change cam 13, the speed is increased within a range below the maximum speed limit, and C<H<B.
When this happens, the speed increase signal is not output, the vehicle speed change motor 16 stops, and the vehicle speed is maintained. When B<H, the microcomputer 33 outputs a deceleration signal to the vehicle speed change motor 16, and when the speed change operation progresses and the detected value becomes C<H<B, the vehicle speed change motor 16 stops, and during this time, the threshing rotation The number is kept in A.

Also, the detection value S of the moisture sensor 29 is the set value
If B<H, the vehicle speed change motor 16 rotates toward the deceleration side, so the vehicle speed decreases.
If H<C, the vehicle speed will be increased, and both B>H>
When the vehicle speed reaches C, that vehicle speed is maintained.

In the case of S > BS+
Since the C signal is output, the threshing rotation speed will match the moisture content of the grains, and the rotation speed of the suction winnow 20, second thrower 23a, etc. will increase as the moisture content increases, thereby improving the wind selection performance. And the throwing performance of the second thrower 23a can be improved.

(g) Effects of the Invention Since the present invention is configured as described above, grain culms that are harvested and threshed are not affected by conditions such as whether they are lodging or non-lodging, or by weather conditions such as the presence or absence of dew. The influence of moisture in grains on threshing can be measured by measuring the moisture content of grains, and adjusting the running speed and threshing rotation speed by taking into account the detected load value. , sorting performance may deteriorate,
It is possible to prevent the second reduction section from clogging.

[Brief explanation of drawings]

The drawings show one embodiment of the invention,
Figure 1 is a side view of the combine, Figure 2 is a sectional view of the moisture detection section, Figure 3 is the layout of the control device, Figure 4 is a flowchart showing control, and Figure 5a is moisture and threshing rotation speed. b is a diagram showing the relationship between load and exhaust temperature, and FIG. 6 is a circuit diagram. 9...Hotsupa, 11...Engine, 14,22
...Continuously variable transmission, 16...Vehicle speed variable speed motor,
20...Suction karakino, 23a...Second thrower, 24
...Blower, 25... Threshing variable speed motor, 26
...Load sensor, 33...Microcomputer.

Claims (1)

[Claims] 1 In a combine harvester in which the power of the engine 11 is distributed to the traveling device 2 and the threshing device 1 via transmissions, the detection value of the load sensor 26 that detects the load on the operating section and the value installed in the grain flow section are determined. The detection value of the moisture sensor 29 is input to the control unit and compared with the respective set value. If the moisture detection value is smaller than the set value, the running speed is controlled to be inversely proportional to the load detection value, and the moisture detection is performed. An automatic control device for a combine harvester configured to control the running speed to be inversely proportional to the detected load value and the rotation speed of the threshing section to be proportional to the detected moisture value when the value is larger than the set value.