JPS62294007A - Reaping height controller in combine - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

Detailed Description of the Invention 3. Detailed Description of the Invention (Field of Industrial Application) The present invention relates to a cutting height control device for a combine harvester.

(Prior art) Conventionally, the cutting height was automatically controlled by a position sensor to the setting dial set by the position sensor setting dial provided on the operating section, and the cutting height was automatically controlled to the set cutting height by the ultrasonic sensor provided at the operating section. These are publicly known.

(Problems to be Solved by the Invention) A known ultrasonic sensor is configured to automatically measure a reference value and operate based on the reference value. During automatic reference value measurement,
If the received waves do not return, or if the distance data calculated from the received waves is not appropriate, it may malfunction, causing damage to the reaping section, the reaping section poking into the grain, or trampling on the grain culm without cutting it. There was a problem that the self-diagnosis function of the ultrasonic sensor became abnormal.

(Means for Solving the Problem) Therefore, the present invention automatically controls the cutting height by the position sensor 17 set by the position sensor setting dial B provided on the operation section 5, and has redundant ultrasonic sensors provided on the operation section. The cutting height is automatically controlled to a preset cutting height by the ultrasonic sensor 20.
The mechanism is provided with an abnormality data detection device, and when an abnormality is detected, the cutting height control device for the combine is configured to interrupt the automatic control based on the ultrasonic sensor.

(Example) An embodiment of the present invention will be described with reference to the drawings.

1 is the frame of the combine harvester, 2 is the traveling device installed below the frame 1, 3 is the automatic feeding type threshing device installed above the frame 1, 4 is the reaping device installed in front of the frame 1, On the other hand, the tip is formed so as to move up and down as shown by arrow A around the horizontal axis 5. 6 is the reaping frame of the reaping device 4, 7 is the vertical movement device (cylinder),
One end is attached to the shaft M8 on the side of the frame 1, and the other end is attached to the shaft 9 on the side of the reaping frame 6, and when the vertical movement device 7 expands and contracts, the reaping device 4 moves up and down about the horizontal axis 5. 10 is a grass cutting body at the forefront, 11 is a pulling device provided at the rear of the grass cutting body 10,
13 is a raking device, 14 is a culm conveying device, 15
16 is a driver's seat, and 30 is an operating section.

A position sensor 17 is provided near the shaft 5, and a pressing piece 19 on the side of the reaping device M4 is in contact with a sensor protrusion 18 of the position sensor 17.

Therefore, an ultrasonic sensor 2 is located at the bottom of the reaping device 4.
Attach 0. Reference numeral 21 denotes a mounting plate for attaching the ultrasonic sensor to the reaping frame 6, which automatically measures a reference value, emits ultrasonic waves to the ground based on the reference value, and automatically controls the ground height of the reaping device 4. do. 22 is a collision prevention sensor.

Further, 26 is an auto-lift switch that is turned ON and OFF by a manual lever 24. For example, when the switch 1 is pulled toward the user, it gives priority to the position sensor 17 and moves the reaping device 4 upward, and when it is pushed to the opposite side, it takes priority over the position sensor 17. Reaping device 4
Move down.

A vehicle speed sensor n is attached to an arbitrary position on the frame 1, and is connected so that the vertical movement device 7 controlled by the controller of the ultrasonic sensor 20 will not operate below a certain speed.

The position sensor setting dial B is a position sensor setting dial, and when the position sensor setting dial δ is adjusted to a desired position, the position sensor 17 is activated based on the setting.

The ultrasonic sensor 20 is connected to a control device 29, and the ultrasonic sensor 20 is configured to stop creating a reference value as soon as the position sensor setting dial 25 is moved, and to start creating the reference value again. .

Further, the creation of a reference value for the ultrasonic sensor is configured such that when the reaping device 4 moves up and down beyond the adjustment range of the position sensor 17, it is immediately stopped and the reference value is created again.

30 is an operation unit, 31 is a central processing circuit, the support is an oscillator, 33
is an amplifier, a word is a comparator, a is an output interface, 3
6 is an ultrasonic sensor abnormality lamp.

(effect) Next, we will discuss the effect.

When the traveling device 2 rotates and moves forward, the weeds are divided by the weed cutting body 10, raised by the pulling device 11, the roots are cut by the cutting blade hill, raked by the raking device 13, and the culm feeding device is carried out by the culm conveying device 14. At step 15, the grain is threshed using the moving feed type threshing device 3.

When the desired cutting height is set using the position sensor setting dial 25, the height of the cutting device 4 is adjusted by the contact between the sensor 18 of the position sensor 17 and the pressing piece 19 of the cutting device. The cutting height is automatically adjusted by the position sensor 17.

In addition, when the reaping device 4 is set to 7A in the adjustment range of the position sensor 17, the 1Mi sonic wave sensor automatically measures the ground height multiple times to determine a reference value, and automatically controls based on the reference value. .

However, during the reference value measurement operation of the ultrasonic sensor,
The reaping device 4 may exceed the adjustment range of the ultrasonic sensor and become abnormal, and in this case, the received ultrasonic waves transmitted from the ultrasonic sensor will not return to the ultrasonic sensor 20. . Further, in some cases, distance data calculated from received waves may exceed an appropriate range.

In such a case, the central processing circuit 31 calculates what is transmitted and received via the oscillator and the amplifier blades, and the output interface 35 illuminates the ultrasonic sensor abnormality lamp 36 and also lights up the ultrasonic sensor 20.
The vertical output of the reaping device 4 is interrupted.

(Effects) Conventionally, the cutting height was automatically controlled by the position sensor to the setting dial set by the position sensor setting dial on the operating unit, and the cutting height was automatically controlled to the cutting height set by the ultrasonic sensor installed in the operating unit. Things are publicly known. However, in the known method, the ultrasonic sensor is configured to automatically measure a reference value and operate based on the reference value, but during the automatic reference value measurement operation of the ultrasonic sensor, If the received wave does not return, or if the distance data calculated from the received wave is not appropriate, it may malfunction, causing damage to the reaping section, the reaping section poking into it, or stepping on the culm without cutting it. There was a problem that the self-diagnosis function of the ultrasonic sensor became abnormal.

However, in the present invention, the mowing height is automatically controlled by the position sensor 17 to the mowing height set by the position sensor setting dial 25 provided on the operating section, and the mowing height is set by the ultrasonic sensor provided on the operating section. In the mowing height control mechanism using the ultrasonic sensor 20, an abnormality data detection device is provided, and when an abnormality is detected, the automatic control using the sonic sensor 20 is interrupted. Since this is a cutting height control device for a combine harvester, if the received wave does not return during the automatic reference value measurement operation of the ultrasonic sensor, or if the distance data calculated from the received wave is inappropriate,
This has the effect of preventing malfunctions such as damage to the reaping section, the reaping section plunging into the grain, or trampling on the grain culm without reaping it.

[Brief explanation of the drawing]

FIG. 1 is an overall side view, FIG. 2 is an installation diagram of the ultrasonic sensor, FIGS. 3 and 5 are block diagrams, and FIGS. 4 and 6 are flowcharts. Explanation of symbols 1...Frame, 2...Traveling device, 3...Automatic feeding type threshing device, 4...Reaping device, 5...Horizontal shaft, 6...
... Frame, 7... Vertical movement device, 8... Shaft mounting, 9
... Axial attachment, 10... Grass cutting body, 11... Pulling device, 12... Cutting blade, 13... Scraping device, 14... Culm conveying device, 15... Grain culm Supply device, 16... Driver's seat, 17... Position sensor, I8... Sensor, 19... Pressing piece, 20... Ultrasonic sensor, 2
1... Mounting plate, n... Thrust prevention sensor, 23... fi culm presence % sensor, 24... Manual lever, 25... Position sensor setting dial 25
．． 26... Auto lift switch, 27... Vehicle speed sensor, 28... Switching pulp, 29... Control device,
30...Operation unit, 31...Central@arithmetic circuit, stagnation...
Oscillator, vane...amplifier, U...comparator, 35...
Output interface, 36... Ultrasonic sensor error lamp.

Claims (1)

[Claims] The mowing height is automatically controlled by the position sensor 17 to the position sensor setting dial 25 provided on the operating section, and the cutting height is automatically controlled to the cutting height set by the ultrasonic sensor 20 provided on the operating section. , a cutting height control device for a combine harvester, wherein an abnormality data detection device is provided in the cutting height control mechanism using the ultrasonic sensor 20, and when an abnormality is detected, automatic control by the ultrasonic sensor 20 is interrupted. .