JPH0367514A - Reaping height controller of combine - Google Patents

Abstract

PURPOSE:To obtain a combine, capable of sensing the set position of a reaper relatively to a car body with a position sensor, using the sensed value with the position sensor in starting control of reaping height ad the control target value, readily setting the control target value and improved in efficiency in reaping operation. CONSTITUTION:The objective machine is constructed as follows. The set position of a reaper 1 sensed with a position sensor 3 relatively to a car body 2 is initially regulated to a desired reaping height position by an operating lever 19 to start reaping operation. Furthermore, reaping height control is started with a reaping height automatic switch, a grain culm sensor and a threshing clutch switch wholly in a state of ON to set the sensed value of the position sensor 3 in starting the aforementioned reaping height control as the control target value for memory thereof in a controller.

Description

[Detailed description of the invention] Industrial applications The present invention relates to a cutting height control device for a combine harvester.

Conventional technology A position sensor is provided to detect the height of the reaping device relative to the vehicle body, and when the reaping device is lowered by adjusting the cutting height setting dial to the set cutting height position, the position sensor detects that the reaping device has been lowered to the set cutting height position. is detected and the descent stops.

Cutting height control is performed using this set cutting height as a control target value.

Problems to be Solved by the Invention In such a configuration in which the cutting height of the reaping device is set using the cutting height setting dial to control the cutting height, it is necessary to set the reaping device to the desired cutting height position by manual operation. When cutting height control is started during the reaping operation, the reaping device is raised and lowered to the setting position of the cutting height setting dial when the cutting height control was started.

Therefore, if the position of the cutting height setting dial when this cutting height control is started is significantly different from the manually set cutting height position of the reaping device, the reaping device will be raised or lowered significantly to set the cutting height. Since the cutting height is moved to the setting position of the dial, the cutting height may deviate significantly and you may have to set the cutting height again.

Therefore, the present invention aims to prevent malfunctions at the start of cutting height control and to facilitate setting of control target values.

Means for Solving the Problems This invention provides a cutting height control device that controls the set position of a reaping device (1) relative to a vehicle body (2) based on detection by a position sensor (3). in some cases,
The combine harvester is characterized in that the detected value of the position sensor (3) at the time of this start is set as the control target value.

Functions and Effects of the Invention The set position of the reaping device (1) with respect to the vehicle body (2) is detected by a position sensor (3), and when cutting height control is started, the position sensor (3) at the time of this start is detected.
The detected value is set as the control target value.

Therefore, at the start of control, the set position of the reaping device (1) with respect to the vehicle body (2) is directly determined by the position sensor (3), so that it is possible to facilitate the setting of the control target value.

Example: On the farm side, the combine harvester is equipped with a left and right running device (5)
A threshing device (6) is mounted on a car body (2) having a car body (2), and a reaping device (1) is provided at the front part of the car body (2).

A left/right traveling device (5) and a reaping device (
A transmission case (7) containing a transmission mechanism for transmitting the reaper (1) is provided, and on the transmission case (7), the upper rear end of the reaper frame (8), which forms the main body of the reaper (1), is connected to the horizontal axis ( 9) Attach the reaper frame (8) so that it can rotate freely around the vehicle body (2).
The horizontal shaft (9) is supported by an elevating cylinder (10) between the
) It is configured so that it can be rotated up and down.

The reaping device (1) extends from the front side of the reaping machine frame (8) to the rear.
A cutting body (11), a culm pulling device (12), a culm raking device (13), a cutting blade device (14), a collecting device (15) for collecting and transporting the cut culm, and this collecting culm. This structure includes a grain transfer device (16) that transfers the grain to the rear threshing device (6).

A culm sensor (17) is provided behind the culm pulling device (12) to detect whether or not the grain culm is stable. The transmission case (7
) is provided with a travel distance sensor (18) that detects the number of revolutions from a part of the transmission mechanism that transmits power to the left and right travel device (5) and detects the travel distance of the left and right travel device (5).

The control platform of the vehicle body (2) is provided with an operating lever (19) that can be tilted 01f rearward. When the operating lever (19) is tilted back and forth, the reaping device (1) can be lowered or raised by extending and contracting the lifting cylinder (10). The expansion and contraction of the lifting cylinder (10) by this hydraulic pressure is controlled by the raising solenoid valve (20) or the lowering solenoid valve (21) which are opened and closed by pulse oscillation in this hydraulic circuit. It is performed by switching to the descending side. (22> is an unload valve, and (26) is a hydraulic pump.

The position sensor (3) is composed of a potentiometer or the like, and is located near the horizontal axis (9), which is the pivot point of the reaper frame (8), and the transmission case (8) that supports the reaper frame (8).
7), and the vertical position of the reaping device (1) with respect to the vehicle body (2) is measured by the rotation angle around the horizontal axis (9).

FIG. 2 is a block circuit diagram showing operation information for the operating lever (19), the automatic cutting height switch (24), and the cutting height control device (23), which includes a CPU, memory, and input/output circuit. Position sensor (3), culm sensor (
17), mileage sensor (18), and threshing device (6)
), when the respective detection information of the threshing clutch switch (25) that detects the manual release of the transmission threshing clutch is input, the mowing height control device (23) operates the raising solenoid valve (20), Downward solenoid valve (21)
, and the unload valve (22) so that control (number g) is outputted to each solenoid.

The reaping device (1) is set at a desired cutting height position using the operating lever (19), power is transmitted to the threshing device (6), and reaping work is started. For cutting height control, turn on the automatic cutting height switch (24).
Culm sensor (17) ON, threshing clutch switch (2
5) Operation starts when turned ON.

The detected value of the position sensor (3) when these conditions are met is set as the control target value, and the cutting height control device (2) is set as the control target value.
3).

At the corner of the reaping end, the reaping device (1) is raised by the operating lever (19), the vehicle body (2) is turned around, and when the reaping device (1) is lowered after entering the unmown area for the next step,
The reaping device (1) is continuously lowered under position control to the set position stored in the previous stroke. Further, even when the reaping device (1) is raised or lowered by the operating lever (19) before entering, the position is controlled and an output is generated to return it to the stored set position.

In this way, when starting the reaping operation, the operating lever (1
Since the position of the reaping device (1) determined by step 9) is controlled as the control target value, target setting can be facilitated.

In addition, when the cutting height is changed using the operating lever (19) during the reaping operation, the position sensor (
The detected value of 3) may be set as the control target value.

When the reaping device (1) is adjusted to a proper cutting height position using the operating lever (19) during reaping work, the cutting height control device (23) detects this manual operation and the change is completed. Position sensor when (3)
The detected value is set as the control target value and the cutting height control device (2
3), and position control of the reaping device (1) is performed based on the stored control target value.

Also, during reaping work, the detected value of the position sensor (3) set with the operating lever (19) is stored as a position setting value, and in the combine harvester that controls the position, the position sensor (3) is used when entering the uncut area. The detected value may also be stored as a position setting value.

At the corner of the cutting end, raise the reaping device (1) using the operating lever (19) to turn the vehicle body (2), and lower the operating lever (19) to restore the position settings stored in the previous stroke. Position control is performed so that the reaping device (1) is lowered. After that, when the operation lever (19) is operated up and down and enters the uncut area in this state, the detected value of the position sensor (3) at this time is stored in the cutting height control device (23) as a new position setting value, Cutting height control is performed based on this set value.

In this way, the position can be set not only during the reaping operation but also before entering the uncut area, so that the efficiency of the reaping operation can be improved.

[Brief explanation of drawings]

The drawings show an embodiment of the present invention; FIG. 1 is a block circuit diagram, FIG. 2 is a hydraulic circuit diagram, and FIG. 3 is a side view of the front part of the combine. In the figure, reference symbol (1> indicates a reaping device, (2>) a vehicle body, (3) a position sensor, and (23) a cutting height control device.

Claims (1)

[Claims] In a cutting height control device that controls the set position of the reaping device (1) relative to the vehicle body (2) based on detection by a position sensor (3), at the start of cutting height control, the position sensor (3) at the time of starting the cutting height control is ) is set as a control target value.