JPH07236329A - Detecting unit for controlling reaping height in harvester - Google Patents

Abstract

PURPOSE:To provide a detecting unit for controlling a reaping height in a harvester having no need to keep an unused earth sensor, capable of dealing with cases when reaping heights change largely and giving only little trouble in handling due to soil clogging by installing a specific earth sensor at a reaping part freely operable upward and downward against the ground. CONSTITUTION:An earth sensor 11 formed so as to freely change its length by bending, stretching and rotating is installed through a supporting shaft 12 freely rocking up and down and forced downward by a spring 13 on a reaping unit which is freely operable upward and downward against the ground, and an automatically controlling mean which operates the reaping unit up and down to keep the attitude of the earth sensor 11 against the machine body in a given state is installed to provide the objective detecting unit for controlling the reaping height in a harvester.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a grounding sensor provided on a mowing section which can be operated to move up and down with respect to the ground so as to keep the cutting height within a set range in a vertically swingable and downwardly biased state. The present invention relates to a cutting height control detection unit of a harvester, which is provided with an automatic control means for raising and lowering the cutting unit so as to maintain the posture with respect to the body in the set state.

[0002]

2. Description of the Related Art Conventionally, when the reference cutting height changes significantly due to a change in high cutting and low cutting or a change in cutting height due to attachment / detachment of attachments, a long ground sensor and a short ground sensor are prepared. A long ground sensor is attached when the reference cutting height is high, and a short ground sensor is attached when the reference cutting height is low.

[0003]

However, it is troublesome to store unused long and short ground sensors, and there is room for improvement in terms of handling. An object of the present invention is to improve a grounding sensor that can cope with a large change in the reference cutting height but does not require storage of a grounding sensor that is not used, and further, trouble in handling due to clogging is unlikely to occur. There is a point in doing so.

[0004]

A characteristic configuration of the present invention is that a grounding sensor is provided on a mowing section which can be lifted and lowered with respect to the ground in a state in which the grounding sensor can swing up and down and is biased downward, and a posture of the grounding sensor with respect to a body is set. In the harvester provided with the automatic control means for raising and lowering the reaper in order to maintain the height, the grounding sensor is formed so that the length can be freely changed by bending and extending.

[0005]

In other words, since the length of the grounding sensor can be freely changed by bending and stretching, the grounding sensor can be extended and lengthened when the reference cutting height is high, and can be folded and shortened when the reference cutting height is low. , A permanent ground sensor can handle changes in the standard cutting height. Therefore, it is possible to eliminate the troublesome situation of storing the unused grounding sensor as in the above-mentioned conventional technique, which is advantageous in handling. By the way, it is possible to make the grounding sensor slide and expand and contract to deal with changes in the standard cutting height with the permanent grounding sensor.
The clogging of the sliding portion easily causes a situation in which the grounding sensor cannot be expanded and contracted. On the other hand, according to the present invention, since the grounding sensor is bent and extended, the clogging of the soil makes it impossible to change the length of the grounding sensor. The situation is unlikely to occur.

[0006]

As a result, it is possible to cope with a case where the ground cutting sensor has a large change in the reference cutting height, but it is unnecessary to store the grounding sensor which is not used, and the trouble in handling due to clogging is unlikely to occur. It is now possible to provide a detection unit for controlling the cutting height of a harvester, which is even easier to handle.

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS As shown in FIG. 1, a reaper 1 is connected to a front part of a traveling vehicle equipped with a crawler type traveling device 3 by a hydraulic cylinder 2 so as to be vertically movable around a fulcrum P.
Threshing device 4 for processing grain culm from the reaper 1 on the traveling vehicle body
It is equipped with and forms an all-flow type axial flow combine.

In the reaping section 1, a reel 6 for scraping the planted grain culm is rotatably driven, a clipper-type reaping device 7 is provided below the reel 6, and a grain culm conveying device to the threshing device 4 is provided. The auger 9 that collects the cut culms is provided at the beginning of 8.
The harvested grain culm mounting / transporting belt conveyor 10 is arranged between the clipper type harvesting device 7 and the auger 9 so that all the grain culms from the grain stalk transporting device 8 are thrown into the threshing device 4.

As shown in FIGS. 2 to 5, a pair of left and right ground sensors 11 made of a horizontally long plate material can be vertically swung via a support shaft 12 and are urged downward by a spring 13 so that the mowing section 1 is provided. The well-known detecting means 14a, 14b such as potentiometers are arranged at a high position where mud does not adhere and are interlocked with the left and right ground sensor 11 separately by the rod 15, and the information from both detecting means 14a, 14b is provided. Based on the left and right, the automatic control means 17 for operating the drive parts 16a, 16b such as hydraulic cylinders for vertically moving the contact portions of the left and right crawlers 3a, 3b of the crawler type traveling device 3 relative to the left and right respectively is provided. The cutting height is maintained at the set height over the entire width by rolling-controlling the machine body so that the attitude of the ground contact sensor 11 with respect to the machine body is maintained at the set state.

Each of the ground sensors 11 comprises a sensor body 11a connected to the support shaft 12 and an extension portion 11b which is pivotally connected to the tip of the sensor body 11a so as to be rotatable about the support shaft 18 so as to be rotatable. Then, the extension portion 11b is rotated and extended rearward, and the extension portion 11b is rotated and bent above the sensor body 11a as shown in FIG. 2 to change the sensor length. The grounding sensor 11 can be freely arranged and can be selected by replacing the detent pin 19 to extend or lengthen the ground sensor 11 or fold it upward to shorten it. That is, when the standard cutting height is high, the ground sensor 11 is lengthened, and when the standard cutting height is low, the ground sensor 1 is long.
1 is shortened so that the permanent ground sensor 11 can cope with the change in the reference cutting height.

A switch 20 for detecting that the ground sensor 11 has become short is provided, and the dead zone width of the automatic control means 17 is automatically changed based on the information from the switch 20. That is, when the ground sensor 11 is long, the detection means 1 for the unit vertical displacement amount of the sensor tip is
Since the displacement amount of 4a, 14b is smaller than the displacement amount of the detecting means 14a, 14b with respect to the unit vertical displacement amount of the tip of the short grounding sensor 11, the dead zone width when the grounding sensor 11 is long, when the grounding sensor 11 is short. It is made smaller than the dead zone width of so that the cutting height control can always be executed accurately.

A boss 21 fixed to one ground sensor 11
The support shaft 12 of the other grounding sensor 11 is inserted in the other, and if necessary, the boss 21 and the support shaft 12 are connected by the connecting pin 22 so that the left and right grounding sensors 11 are integrally swung up and down to move the left and right crawlers. The grounding portions of 3a and 3b are configured to be able to move up and down with the same amount to the machine body, and the connecting pin 22 is attached to the storage hole 23 of the tube 21 when the connection between the boss 21 and the support shaft 12 is released. There is.

[Other Embodiments] The present invention can be applied to various harvesting machines such as self-removing combine harvesters, the specific configuration of the mowing unit 1 can be appropriately changed according to the type of harvesting machine, and the harvesting target can be any matter. is there. In order to raise / lower the reaper 1 by the automatic control means 17 in order to maintain the attitude of the ground sensor 11 in the set state, the hydraulic cylinder 2 for raising / lowering the reaper is automatically operated based on the information from one ground sensor 11. The specific control mode such as the above configuration can be appropriately selected. Means for maintaining the ground sensor 11 in either a bent state or a stretched state can be appropriately selected from known means.

It should be noted that although reference numerals are given in the claims for convenience of comparison with the drawings, the present invention is not limited to the structures of the accompanying drawings by the entry.

[Brief description of drawings]

1] Overall side view of combine

FIG. 2 is a side view of an essential part of the grounding sensor in an extended state.

FIG. 3 is a side view of a main part of the grounding sensor in a shortened state.

[Fig. 4] Front view of main parts

[Figure 5] Control system diagram

[Explanation of symbols]

 1 Mowing part 11 Grounding sensor 17 Automatic control means

Claims (1)

[Claims] 1. A grounding sensor (11) is provided on a mowing section (1) which can be lifted and lowered with respect to the ground in such a manner that it can swing vertically and is biased downward, and the attitude of the grounding sensor (11) with respect to the body is set to a set state. A harvesting machine provided with an automatic control means (17) for raising and lowering the cutting section (1) to maintain the harvesting machine, wherein the grounding sensor (11) is formed so as to be freely length-changed by bending and stretching. Cutting height control detector.