JPH07312957A - Automatic threshing depth controller in combine - Google Patents

Abstract

PURPOSE:To provide an automatic controller for threshing depth in a combine wherein the automatic control of threshing depth in the ordinary reaping height and that in the higher reaping height can be done can be mixed. CONSTITUTION:In a combine in which its machine body equipped with traveling unit 1 carries a threshing unit 2, a driver's seat, a tank for threshed grains; further the pretreatment apparatus comprising a reaping unit and a conveyer for feeding the cut stems to the threshing unit is vertically inclinably attached to the front part of the machine body, thus the threshing depth is automatically controlled by slowly or intermittently actuating the driving unit for the threshing depth controller depending upon the detection signals from the stem-length detector, the reaping height detector 25 is attached to the pretreatment apparatus and, when the detector is converted from the low reaping detection (the reaping unit 12 comes near the ground) to the high reaping detection, or from high reaping to low reaping, the driving unit for the threshing depth controller actuates at a higher speed than the low cutting or continuously.

Description

Detailed Description of the Invention

[0001]

INDUSTRIAL APPLICABILITY The present invention provides a combine harvester capable of cutting and threshing the culms on the center side of a field according to a conventional method, as well as the culms along ridges. The present invention relates to a handling depth automatic control device.

[0002]

2. Description of the Related Art Conventionally, since grain culms along ridges could not be mowed by combine harvesters, they were hand-cut and the threshing device of the combined harvester was stopped by manual measures. The grain culms were manually supplied and threshed.

[0003]

With the known combine harvester, the work of hand-cutting the grain culms along the ridge is extremely labor-intensive and has a low efficiency. They had to be transported manually and lifted to the feed port of the threshing device at a high position.

[0004]

According to the present invention, a threshing device, an operating unit, a grain tank, an engine and the like are mounted on a machine base having a traveling device, and a cutting device and a cut grain are provided in the front part of the machine base. A pretreatment device consisting of a grain culm transporting device for feeding culms to a threshing device is mounted so as to be vertically tiltable, and the depth of handling is detected by a detection signal of a culm length detector that detects the culm length of the grain culm transported by the grain culm transporting device. In a combine configured to automatically adjust the handling depth by operating the driving device of the height adjusting device at low speed or intermittently, a cutting height detector is attached to the pretreatment device, and the cutting height detector is low cutting. (When the mowing device is close to the ground) When converting from detection to high-cutting detection or converting from high-cutting detection to low-cutting detection, the drive device of the handling depth adjusting device operates at a higher speed or continuously than when cutting low. The above problem is solved by controlling it to operate. It has improved followability of the threshing depth adjustment device at the time of conversion of the high cutting and low cutting while.

[0005]

[Operation] In a place where the machine does not need to travel around the field, the pretreatment device is lowered so that the mowing device approaches the ground, and the grain culm is mowed. The drive device of the automatic handling depth adjusting device slowly moves or intermittently tilts by the intermittent action to convey the culm culm so that it has an appropriate handling depth, and supplies it to the threshing device for threshing treatment.

Then, when the pretreatment device is raised along the ridge to such an extent that the cutting device does not contact the top of the ridge, the detection result of the cutting height detector is converted from low cutting detection to high cutting detection. , On the other hand, the mowing device mows the grain stalks at successively higher positions, and at a position slightly higher than the top surface near the ridge,
The grain culm that has been cut short is conveyed toward the threshing device by the grain culm transporting device, while the culm length detector is shortened by the amount of high cutting of the grain culm to be cut, so the grain culm transporting device is
Although the depth adjustment operation is performed, if the detection result of the cutting height detector is converted, the drive device of the depth adjustment device operates at high speed or intermittently to rapidly adjust the depth of the grain culm conveying device and perform high cutting. The cut short grain culm is fed deeply to the threshing device. At that time, it is desirable to insert the whole conveyed grain culm into the supply port of the threshing device and perform the threshing treatment. In addition, when the grain precipitator along the ridge is finished and the pretreatment device is lowered in order to shift to normal threshing threshing, the detection result of the cutting height detector is converted to low cutting, so the driving depth adjustment device is driven. When the apparatus operates at high speed or continuously, the pretreatment apparatus descends rapidly and returns to the low mowing state, and in this state, the normal low speed depth adjustment is performed.

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described with reference to the drawings. A self-removing threshing device 2 is mounted on one side of a machine platform having a traveling device 1, and a driving section and a grain are provided on the other side. A tank and an engine are provided, and a grain culm sandwiching and conveying device 6 composed of a feed chain 3 and a sandwiching rail 5 is provided along the handle of the threshing device 2, and a cutting blade 7, 8 grass bodies
., Grain culm raising body 9 ..., scraping ring 10, and stem scraping belt 1
It is composed of a mowing device 12 consisting of 1 and an ear-side carrier 13 and a stock-source sandwiching carrier 14, and is tilted up and down by a lift cylinder 17 which is a drive device around a shaft 15 in the upper rear part to handle a depth. A pretreatment device consisting of the grain culm transporting device 16 for adjustment is provided, and although not shown, the grain culm transporting device 16 is provided with a culm length detection sensor like the conventional one, and the handling depth is determined by the detection result. It is configured so that it can be automatically adjusted.

Then, the two rail pieces 5a and 5b from the front end of the pinching rail 5 of the grain-culm pinching and conveying device 6 penetrate the hanging rods 18 and 18 through the hanging plate 19, and hold the hanging plate. 19 are connected to a hydraulic cylinder 21 mounted on a support arm 20, and the suspension rods 18 of the other rail pieces 5c are supported by a rail frame 22 so that they can be moved up and down. On the shaft 15 or the frame 23, a cutting height detector 25 composed of a potentiometer interlocked with the operation of the lift cylinder 17 via a rod 24 is mounted, and the cutting height detector 25 is usually At the time of mowing (when the mowing device is moving close to the ground), the L level signal (low mowing signal) is emitted, and the mowing device is a little higher than the top surface of the ridge along the ridge. When tilted up to the position, an H level signal (high cutting signal) is emitted.

Explaining the cutting and threshing work by the combine, the threshing clutch lever is operated by turning on and off the manual cutting height automatic control switch and the automatic handling depth control switch of the handling depth automatic control circuit provided in the operating section. When set to the on position, the self-removal work switch is turned on, when the pretreatment clutch lever is set to the on position, the pretreatment lever switch is turned on, and when the traveling speed change lever is set to the desired speed position, it is set to the traveling speed. The potentiometer of the lever detects it, and those detected values are input to the microcomputer.

At locations other than the vicinity of the ridge, the preprocessing device is advanced with the grass bodies 8 ... Proximity to the ground, and at that time, the cutting height detector 25 outputs an L level signal. In the grain culm transporting device 16, the handling depth is automatically controlled based on the detection value of the culm length detector, the hydraulic cylinder 21 extends, and the spring causes the rail pieces 5a and 5b to approach the feed chain 3 for normal clamping. Since it is in the transporting posture, normal mowing and threshing work can be performed. Next, when approaching the ridge, the lift cylinder 1
When 7 is operated to raise the pretreatment device to approximately the same height as the top surface of the ridge, the cutting height automatic control switch, the cutting depth automatic control switch, the cutting height automatic control switch, the self-removal work switch and the pretreatment lever are Since the cutting height detector 25 is converted to the H level when the switches are ON, the grain culm transporting device 16 is faster than the low cutting mode to the deepest handling position regardless of the detection result of the culm length detector. The short grain culm that is turned down by the operation (or continuous movement in the case of inching control) and cut at a high position is transported by the grain culm transporting device 16 to the rear of the grain culm, which is closer to the root of the plant, and is conveyed. After the device 16 descends and turns, and after a certain period of time (while the grain culm in the grain culm transporting device 16 has been supplied) elapses, the hydraulic cylinder 21 shrinks and the rail pieces 5a, 5b are resisted against the spring. Pull up, at the same time The detection result of the culms conveying device 16 culm length detector quickly lowered pivoted regardless deepest handling position,
The short grain culm cut at a high position is sandwiched by the grain culm transporting device 16 near the root of the plant, and then sent later, the ear side is inserted into the supply port of the threshing unit 2, and the plant side is fed by the feed chain 3
The guide rod 2 is made of an elastic rod on the support frame 14a of the stock carrier 14 at that time.
The base of 7 is fixed by screwing, and the guide rod 27 is pressed against the chain roller at the rising end of the feed chain 3,
Since the tip portion is extended to the portion corresponding to the plurality of vertically moving rail pieces 5a ..., The root portion of the transferred grain stem is conveyed while being lightly clamped, and the rail pieces 5a, 5
Since b is raised and the gap with respect to the feed chain 3 is wide, the spikes with all the grains are strongly pulled by the handling teeth of the handling cylinder, and the root end of the plant holds the grain culms. Without being pinched at the beginning of the device 6,
The whole grain culm is easily drawn into the handling room and shredded in the same manner as the thresher type. However, when cutting and threshing the grain culms along the ridge, the load on the handling cylinder becomes large, so it is desirable to reduce the traveling speed to some extent in order to reduce the amount of grain culms supplied. Also, when adjusting the depth of handling from the deepest handling state, the rail pieces 5a and 5b are delayed for a certain period of time to descend.

After cutting the grain culm along the ridge high, when the aircraft is moved backward to perform normal low cutting, the pretreatment device is lowered, and the cutting height detector 25 issues an L level signal,
As a result, the lift cylinder 17 operates at high speed or continuously to rapidly lower the pretreatment device, and when the cutting height reaches a normal level, the cutting height detector 25 issues an L level signal.
The drive device of the handling depth adjusting device based on the detection result of the culm length detection sensor, that is, the lift cylinder 17 is operated at low speed or intermittently to slowly adjust the handling depth. When the automatic manual changeover switch is switched to manual and the handling depth is adjusted by the manual handling depth adjusting switch, the lift cylinder 17 operates at high speed or continuously.

[0012]

According to the present invention, a threshing device 2, an operating unit, a grain tank, an engine and the like are mounted on a machine base having a traveling device 1, and a mowing device and a mowing culm are provided in front of the machine base. A pretreatment device including a grain culm transporting device 16 supplied to the threshing device 2 is mounted so as to be vertically tiltable, and is handled by a detection signal of a culm length detector that detects the culm length of the grain culm transported by the grain culm transporting device 16. In a combine in which the driving device of the depth adjusting device is operated at low speed or intermittently to automatically adjust the handling depth, a cutting height detector 25 is attached to the pretreatment device, and the cutting height detector 25 is attached. Is converted from low mowing (the state where the mowing device 12 is close to the ground) detection to high mowing detection or from high mowing detection to low mowing detection, the drive device of the handling depth adjusting device is more than that at the time of low mowing. Since it is controlled to operate at high speed or continuously, When adjusting the cutting depth in the normal manner, which is performed by moving the tool closer to the ground, it is possible to adjust the cutting depth in a stable manner at low speed, but when shifting to high cutting or from high cutting to normal low cutting. At the time of transition, the drive device of the handling depth adjustment device operates at high speed simply by raising and lowering the pretreatment device without manual operation, and the handling depth can be rapidly and automatically adjusted, improving work efficiency and operability. It is possible to prevent the operation error.

[Brief description of drawings]

FIG. 1 is a side view of a combine.

FIG. 2 is a side view of the starting end of the grain-culm sandwiching and conveying device.

FIG. 3 is an input / output control diagram.

FIG. 4 is a flow chart diagram.

FIG. 5 is a side view of a cutting height detector mounting portion.

[Explanation of symbols]

 2 Threshing device 5 Clamping rails 6 Grain squeezing and conveying device 12 Mowing device 16 Grain culm conveying device 21 Hydraulic cylinder 25 Cutting height detector

Claims (1)

[Claims] 1. A threshing device 2, an operating unit, a grain tank, an engine, etc. are mounted on a machine stand having a traveling device 1, and a mowing device and a mowing culm are provided on the threshing device 2 in the front part of the machine stand. A pretreatment device consisting of a grain culm conveying device to be supplied is mounted so as to be tiltable up and down, and the handling depth adjusting device is driven by a detection signal of a culm length detector that detects the culm length of the grain culm conveyed by the grain culm conveying device In a combine configured to automatically adjust the handling depth by operating the device at low speed or intermittently, a cutting height detector 25 is attached to the pretreatment device, and the cutting height detector 25 reduces cutting (cutting device). (When the vehicle is close to the ground) is converted to high-cutting detection or high-cutting detection is changed to low-cutting detection, the drive device of the handling depth adjustment device operates faster or continuously than when cutting low-cutting. In a combine characterized by controlling Handling depth automatic control device.