JPS5951966B2 - Automatic working height control device for mobile harvesters - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention provides a first drive mechanism for driving up and down a harvested crop processing device disposed on the upper part of the traveling device with respect to the traveling device, and a ground harvesting mechanism disposed in the front part of the traveling device. Regarding an automatic working height control device for a mobile harvesting machine such as a combine harvester or an onion harvesting machine, the device is equipped with a second drive mechanism that drives the device up and down with respect to the rear processing device, and the purpose thereof is to The height adjustment (harvesting from this front working device) to the harvested crop processing device maintains the transfer effect as good as possible, while also preventing collision of the front working device with the ground and poor harvesting. The aim is to ensure that the process can be carried out reliably and well even under conditions where there is no problem.

First, embodiments of the present invention will be explained based on the drawings.

FIG. 1 shows a combine harvester, which is one type of mobile harvester, in which a threshing device 2 having a threshing feed chain 2A is mounted on the top of a traveling device 1 consisting of a pair of left and right crawlers IA, IA.
The body frame 2B on the side of the threshing device 2 and the track frame 1B on the side of the traveling device 1 constitute a parallel link mechanism. In front of the devices 1 and 2, there are a pulling device 4A, a recan-type cutting blade 4B, and a vertical conveying device that transports and supplies the reaped husk culm 1 to the sideways posture while conveying it to the threshing feed chain 2A. The reaping device 4 consisting of a 40 etc.
It is connected to the surrounding area so that it can be raised and lowered freely.

. □ Also, as shown in FIG. 2, a pair of left and right first drive mechanisms 3, 3 drive the threshing device 2 up and down with respect to the traveling device 1, and a pair of first drive mechanisms 3, 3 drive the reaping device 4 with respect to the threshing device 2. A second drive mechanism 5 for raising and lowering is provided, and sensors 6.6 for detecting the height above the ground are provided on both left and right sides of the reaping device 4, and when the amount of displacement in the height above the ground detected by the sensor 6.6 is small. When only the first drive mechanisms 3, 3 are operated, and the amount of height displacement from the ground detected by the sensor 6 is large, the first and second drive mechanisms 3.
In order to operate both 3 and 5, a mechanism 8 is provided which can automatically control the height of the cutting device 4 above the ground.

The first drive mechanisms 3, 3 include a pair of left and right rear links 7.
7 and the truck frame 1B, and electromagnetic valves 3B, 3B, etc., which control the expansion and contraction operations of the hydraulic cylinders 3A, 3A, and the like.
The second drive mechanism 6 includes a bent link 5A and a hydraulic cylinder 5B interposed between the reaping frame 4D and the machine frame 2B of the reaping device 4, and the hydraulic cylinder 5.
It is composed of an electromagnetic valve 50 etc. that controls the expansion and contraction operation of B.

The automatic height control mechanism 8 above the ground is constructed as follows.

That is, the left and right sensors 6.6 and the first drive mechanisms 3, 3
The electromagnetic valves 3B, 3B, which are constituent members, are electrically connected to the lifting and lowering solenoids 3a, 3b and 3a, 3b, respectively, while the left and right sensors 6.6 are the constituent members of the second drive mechanism 5. It is electrically connected to both the lifting and lowering solenoids 5a and 5b of the electromagnetic valve 5C.

In addition, in the middle of the control system from the left and right sensors 6.6 to the electromagnetic valves 3B, 3B on the first drive mechanism 3.3 side and the electromagnetic valve 5C on the second drive mechanism 5 side, there are Delay circuits 8A, 8A, and 8B are provided to reject the signal, and a delay circuit 8 on the second drive mechanism 5 side is provided.
The delay circuit 8A on the first drive mechanism 3, 3 side,
It is set longer than the rejection time of 8A.

Therefore, neither the first drive mechanism 3 nor the second drive mechanism 5 operates in response to the instantaneous detection operation of the sensor 6.6.

Further, the sensor 6°6 is within a range that is greater than or equal to the rejection time of the delay circuits 8A, 8A on the first drive mechanism 3, 3 side, and smaller than the rejection time of the delay circuit 8B on the second drive mechanism 5 side. When the detection is activated, that is, when the detected height displacement from the ground is small, it is based on the detection result of the sensor 6.6.

Then, only the first drive mechanisms 3, 3 operate.

Furthermore, when the sensor 6.6 operates for a period longer than the rejection time of the delay circuit 8B on the second drive mechanism 5 side, that is, when the detected height displacement from the ground becomes large, the sensor 6.6 Based on the detection result, the first drive mechanisms 3, 3 and the second drive mechanism 5 operate together.

In the figure, S1. S2 and S3. S4 is a switch for detecting that the hydraulic cylinders 3A, 3A of the first drive mechanisms 3, 3 have expanded and contracted to the maximum raised position and the maximum lowered position, and each of these switches S1. S2 and S3. S
4 contacts Sa1. Sa2 and Sa3. Sa4 is interposed in the ascending and descending circuits 1 of the electromagnetic valves 3B and 3B, respectively.

Further, when the first and second drive mechanisms 3 and 5 operate together, it may be configured so that both of them operate simultaneously, or after the operation of the first drive mechanism 3 is completed. The configuration may be such that the second drive mechanism 5 is actuated at the same time.

In summary, in the automatic working height control device for a mobile harvester according to the present invention, the front working device 4 is provided with a sensor 6 for detecting the height above the ground, and the height above the ground detected by the sensor 6 is When the amount of displacement is small, only the first drive mechanism 3 is operated and the sensor 6 is activated.
When the amount of height displacement from the ground detected by
The present invention is characterized in that a mechanism 8 capable of automatically controlling the height of the front working device 4 above the ground is provided in order to operate both the second drive mechanisms 3 and 5.

In other words, when harvesting in areas with small irregularities,
By operating only the first drive mechanism 3 based on the detection result by the sensor 6, the relative postures of the front working device 4 and the rear processing device 2 are maintained constant, and the crop support between them is maintained. While the handing operation is performed smoothly and well, the front working device 4 can be automatically adjusted to a predetermined working height above the ground. By operating both the first and second drive mechanisms 3 and 5 based on the detection result by the sensor 6, collision with the ground and poor harvest caused by insufficient elevation of the front working device 4 can be avoided. be able to.

Therefore, while adjusting the height of the front working device 4 above the ground, the crop tray from the front working device 4 to the rear processing device 2 maintains the handing action as good as possible, and moreover, It has now been possible to perform the process reliably and successfully without any collisions or poor harvests.

[Brief explanation of the drawing]

The drawings illustrate an embodiment of the automatic working height control device for a mobile harvester according to the present invention, and FIG. 1 is an overall side view of the combine harvester, and FIG. 2 is a control system diagram of the main parts. DESCRIPTION OF SYMBOLS 1... Travel device, 2... Harvested crop processing device, 3... First drive mechanism, 4... Ground harvesting device, 4A... ...Lifting device, 5...
...Second drive mechanism, 6...Sensor, 8.
·····mechanism.

Claims (1)

[Claims] 1. A first drive mechanism 3 for driving and lowering the harvested crop processing device 2 disposed above the traveling device 1 with respect to the traveling device 1.
and a second drive mechanism 5 for driving up and down the ground harvesting device 4 disposed at the front of the traveling device 1 with respect to the rear processing device 2. A height above ground detection sensor 6 is provided, and when the amount of height displacement from the ground detected by this sensor 6 is small, only the first drive mechanism 3 is operated, and when the amount of displacement from the ground height detected by the sensor 6 is large. In this case, a mechanism 8 capable of automatically controlling the height of the front working device 4 above the ground is provided so as to operate both the first and second drive mechanisms 3 and 6. Automatic working height control device for machines. 2. The work in the mobile harvester according to claim 1, wherein when the first and second drive mechanisms 3 and 5 are operated, both 3 and 5 are configured to operate simultaneously. Automatic height control device. 3. The mobile harvester according to claim 1 or 2, which is a reaping device equipped with the front working device 4-power bow 1 raising device 4A, and the rear processing device 2 is a threshing device. Automatic working height control device.