JPS5932257Y2 - Combine harvester with automatic cutting height control mechanism - Google Patents

Description

[Detailed description of the invention] The present invention operates the reaping part so that the height of the reaping part above the ground is maintained within a set range based on a detection signal from the reaping part height above the ground detection mechanism attached to the reaping part. This invention relates to a combine harvester equipped with a mechanism for automatically controlling elevation.

In such a combine harvester equipped with an automatic cutting height control mechanism, if the working conditions are good, such as the planting state such as the degree of lodging of the planted culm, or the field condition such as the slope of the tiller, automatic cutting height control can be used to adjust the ground condition. Regardless of the situation, it is possible to reliably maintain the appropriate cutting height and perform the intended combine harvesting operation well. If the automatic cutting height control mechanism is activated even when working under adverse conditions such as when working on ridges, where the tiller is highly tilted, or where the tiller's undulation changes rapidly, If the sensor is placed in inappropriate contact with the sensor, the detection accuracy will be significantly reduced, and the automatic cutting height control performance will be extremely deteriorated, such as the cutting section being raised and lowered unnecessarily. It acts as a factor that makes the situation unstable.
When working under such adverse conditions as described above, it is required to cut off the operation of the automatic cutting height control mechanism.

In view of this, the present invention makes effective use of the fact that the vehicle speed is naturally changed to an extremely low speed when working under the above-mentioned adverse conditions. The purpose is to reliably cut off the operation of the automatic control mechanism.

The combine harvester with an automatic cutting height control mechanism according to the present invention is characterized in that it is provided with a mechanism that disables the operation of the automatic elevation control mechanism when the vehicle speed is operated below the set speed. shall be.

In other words, the operation of the automatic cutting height control mechanism can be automatically cut off by changing the vehicle speed to below the set speed.
When working under good conditions, automatic cutting height control allows work to be performed at the appropriate cutting height, but under adverse conditions as described above, where the vehicle speed must be changed to an extremely low speed below the set speed. During work, it has become possible to reliably turn off the automatic cutting height control mechanism without requiring any special operations.

Particularly, when a device is provided to indicate that the inoperable mechanism is in an activated state, it is possible to prevent erroneous operations such as manual control by mistake during automatic control.

Hereinafter, an embodiment of the present invention will be described based on the drawings. A planted culm is divided and raised at the front of a traveling machine body equipped with a threshing section A and a traveling device B having a pair of right and left crawlers. A reaping section C for later cutting is arranged so as to be able to swing up and down so that the cutting height can be adjusted, and the reaped husk is connected to the threshing section A,
A device that can be conveyed and supplied to the feed chain a of the threshing section A, and that can adjust the insertion length of the shell culm into the threshing section A by changing the position where the shell culm is held by the feed chain a in the culm length direction. , a hydraulic continuously variable transmission device, and is configured to be able to adjust the workload of the threshing section A by changing the amount of culm reaped per unit time by changing the vehicle speed, the reaping section The mechanism 1 detects the height of the reaping section C relative to the ground by adjusting the rocking posture of the ground sensor 1a attached to the reaping section C, and the mechanism 1 detects the height of the reaping section C relative to the ground, and the height of the reaping section relative to the ground is within a set range based on the detection signal from this. A mechanism 2 that automatically controls the elevation of the reaping section C using a hydraulic cylinder 2a so that the reaping section C is maintained, and a mechanism 2 that disables the automatic control mechanism 2 when the transmission is operated below a set speed. The mechanism 3 is also provided with a device 4 for indicating that it is in operation.

The inoperable mechanism 3 is pressed by the lever 5 when the operating lever 5 of the transmission is located in the operating range (1) below the set speed, the neutral operating position (N), and the reverse operating range (R). a lever operation position in which the lever 5 is in a retracted position and is located in an operation range v2 of a set speed or higher, the lever 5 is released from being suppressed and elastically automatically returns to a position in which it projects into the lever operation path 6; In addition to providing a detection sensor 7, 0N is applied to the automatic control mechanism 2.
- OFF switch S1 is pressed by this sensor 7 when the sensor 1 is in the retracted position, and is turned off;
In addition, when the sensor 7 returns, the suppression is released and the sensor is turned on, so that the automatic control mechanism 2 is automatically disabled in conjunction with the aircraft stop and reverse operation. , and is configured to automatically release the disablement in conjunction with a gear change operation to a set speed or higher.

The display device 4 includes a display lamp 8 and an ON-OFF switch S2 for the display lamp 8.
When the sensor 1 is in the retracted position, it is pressed by the sensor 7 and is turned on, and when the sensor 1 is in the return position, the suppression is released and it is turned off.

[Brief explanation of the drawing]

The drawings illustrate an embodiment of a combine harvester with an automatic cutting height control mechanism according to the present invention, and FIG. 1 is an overall side view, and FIG. 2 is a control system diagram. C... Reaping section, 2... Reaping section height detection mechanism, 3... Inoperable mechanism, 4...
・Display device.

Claims (1)

[Scope of Claim for Utility Model Registration] ■ Based on the detection signal from the reaping section height above the ground detection mechanism 1 attached to the reaping section C, the reaping section C is configured to maintain the reaping section height above the ground within a set range. The combine harvester is equipped with a mechanism 2 for automatically controlling the elevation of the vehicle, and is characterized by being provided with a mechanism 3 that disables the automatic elevation control mechanism 2 when the vehicle speed is operated below a set speed. Combine harvester with automatic cutting height control mechanism. (2) The combine harvester with an automatic cutting height control mechanism according to claim (2), which is provided with a device 4 for indicating that the inoperable mechanism 3 is in an operating state.