JP2019129724A - Combine - Google Patents

Abstract

To control reaping height of a combine which reaps grain culm vegetated on a field by a before-reaping processing part and harvests the same, which can perform surely lift control of the before-reaping processing part even when an irregularity is present in the field, and which can perform harvest work safely.SOLUTION: A combine for performing lift control of a before-reaping processing part 3 provided on a front side of a vehicle body 1 by a lift cylinder 24, comprises on left and right parts of a bottom of the before-reaping processing part 3, a left reaping height ground sensor 25L and a right reaping height ground sensor 25R. If any of the left reaping height ground sensor 25L and the right reaping height ground sensor 25R is equal to or less than a reference reaping height or more than the reference reaping height, a reaping height controller 27 outputs an intermittent drive signal to the lift cylinder 24, for lift control of the before-reaping processing part 3 to the reference reaping height.SELECTED DRAWING: Figure 4

Description

  The present invention relates to combine cutting height control.

  The combine travels while maintaining a predetermined cutting height from the field scene so that the cutting blade device of the pre-cutting processing unit provided at the front part of the machine body cuts the stock of the vegetation cereal.

  For example, in the combine described in Patent Document 1, a cutting height grounding sensor is provided at the bottom of the pre-cutting processing unit, and this cutting height grounding sensor contacts the field scene to detect the ground height of the pre-cutting processing unit. Elevation control is automatically performed so that the front end of the pre-cutting processing unit does not contact the field scene.

JP 2017-99298 A

  However, if the aircraft tilts due to the unevenness of the farm scene or suddenly encounters the convex part of the farm field, the combine operator needs to slow down the traveling speed or manually raise and lower the pre-cutting processing unit.

  The present invention is a combine that automatically controls the pre-cutting processing unit to raise and lower the pre-cutting processing unit reliably even if the machine body is tilted or suddenly encounters a convex part of the field due to unevenness in the field. The challenge is to control the cutting height of the combine that allows safe harvesting.

  The problems of the present invention are solved by the following technical means.

  According to the first aspect of the present invention, in a combine that controls lifting / lowering of the pre-cutting processing unit 3 provided at the front portion of the vehicle body 1 by the lifting / lowering cylinder 24, a left cutting height grounding sensor 25L and a right cutting A height grounding sensor 25R is provided, and when either the left cutting height grounding sensor 25L or the right cutting height grounding sensor 25R detects the reference cutting height or less, the cutting height control device 27 changes the lifting cylinder 24 to the lifting cylinder 24. An intermittent drive signal is output, and the harvesting preprocessing unit 3 is controlled to move up and down to the reference cutting height.

  The invention of claim 2 is characterized in that the frequency of the intermittent drive signal is reduced as the sensor detection values of the left cutting height grounding sensor 25L and the right cutting height grounding sensor 25R approach the reference cutting height. The combine described in 1.

  The invention according to claim 3 is characterized in that the frequency of the drive signal for driving the lifting cylinder 24 of the cutting height control device 27 is made finer at the time of lowering than when the pre-cutting processing unit 3 is raised. And

  In the first aspect of the present invention, the ground height of the pre-cutting processing unit 3 is detected by the left cutting height grounding sensor 25L and the right cutting height grounding sensor 25R, and one of the left and right cutting height grounding sensors 25L and 25R is used as a reference. When a height below or above is detected, an intermittent drive signal is output from the cutting height control device 27 to the lifting cylinder 24 to quickly move up and down, so that the pre-cutting processing unit 3 does not deviate significantly from the reference height, and the field Responding to the irregularities on the surface in a flexible manner, you can perform reliable cutting operations.

  In the invention of claim 2, when the pre-cutting processing unit 3 approaches the reference cutting height or the set cutting height, the frequency of the drive signal for controlling the lifting cylinder 24 of the cutting height control device 27 is stepwise or steplessly. Thus, the pre-cutting processing unit 3 can be accurately set to the reference cutting height or the set cutting height.

  In the invention of claim 3, the pre-cutting processing unit 3 can be quickly raised, and even when the gravity load of the pre-cutting processing unit 3 is applied at the time of lowering, it can be accurately returned to the reference cutting height with fine speed control. Quick mowing is possible.

It is a sectional side view of a general purpose combine. It is a sectional side view of the principal part same as the above. It is a front view of a general purpose combine. It is a control block circuit diagram of a combine.

  Hereinafter, embodiments of the present invention will be described with reference to examples shown in the drawings. In the description of the embodiment, the left and right directions in the forward direction of the aircraft are referred to as left and right, respectively, the forward direction is referred to as forward, and the backward direction is referred to as rear. However, the configuration of the present invention is not limited.

  The combine mainly includes a pre-cutting processing unit 3 at the front part of the vehicle body 1 provided with a traveling crawler 2 that cuts and conveys the vegetation cereal straw, and a rear part of the vehicle body 1 that threshs the cereal meal that is conveyed and supplied from the pre-cutting processing unit 3 It consists of a threshing unit 4. On the right side of the pre-harvest processing unit, an operation unit such as an operation box and a driver's seat 5 is installed, and behind that is mounted a Glen tank 6 for temporarily storing the threshed grain. When the grain is taken out of the machine, it is discharged by a discharge auger 7 that can be moved up and down and turned left and right.

  The pre-cutting processing unit 3 includes a scraping reel 9 having a scraping tine 8 for scraping the crop stalk backward, a clipper-type cutting blade device 10 for cutting the stalk after cutting, and a stalk after cutting. A feed auger 12 which feeds the inside of the feeder house 13 to the rear upper side and feeds it into the threshing unit 4 and the like. .

  The threshing unit 4 includes a spiral handling cylinder 15 installed on the upper part in the front-rear direction, a handling chamber 17 in which a receiving net 16 is stretched below the handling cylinder 15, and a swing sorting shelf provided swingably below the receiving net. 18 and the swing sorting shelf 18 are arranged with a tang 19, a first transfer spiral 20, a second transfer spiral 21 and the like in order from the front side.

  The pre-cutting processing unit 3 that automatically controls the cutting height is provided so as to be able to move up and down with a cutting input shaft 23 laid horizontally at the end of the feed conveyor 14 as a fulcrum, and before cutting through the lifting cylinder 24 by operating the cutting lift lever 22. The processing unit 3 is moved up and down to change the ground height of the cutting blade device 10.

  At the bottom of the table 11, the pre-cutting processing unit 3 detects the vertical ground angle sensors 25L and 25R for the right and left cutting height grounding sensors 25L and 25R for detecting the ground height by the degree of contact with the ground, and the vertical rotation angle of the pre-cutting processing unit 3 A general-purpose combiner is configured by providing a cutting height control device 27 from the cutting height position 26 and the like.

  When the cutting height control switch 29 is pressed for a few seconds while the bottom of the pre-cutting processing unit 3 is in contact with the ground, the sensor adjustment control unit 28 intermittently outputs the pre-cutting processing unit for a predetermined time. Means are provided for automatically storing the sensor value at the end of output as a reference value (a reference value during descent). According to this, it is not necessary for the operator to store the adjustment value by adjusting the cutting height to the reference height, and the troublesome adjustment of the operator can be eliminated.

  In addition, the control reference value for cutting height control is adjusted for each intermittent output count when the adjustment value is automatically stored while intermittently rising after adjusting the minimum value (descent reference value) for cutting height control. A reference value (elevation reference value) for each stage is stored. According to this, since an operator memorize | stores adjusting a cutting height for every item, a considerable man-hour is not required unlike the past, and an operator's troublesomeness can be eliminated.

  In the above configuration, a normal range of sensor values to be stored and adjusted in advance is stored, and when automatic adjustment is performed, if a value outside the range is not stored, a warning is issued with a horn or buzzer. Therefore, even if the adjustment contents fail, the operator can be notified, so that the work is not continued with the failure.

  From the cutting height control device 27 to the control valve of the elevating cylinder 24, pre-cutting processing is performed by rapidly expanding / contracting with a continuous on signal or changing the expansion / contraction speed by changing the cycle of a pulsed on / off signal. The raising / lowering speed of the part 3 is changed. The ascending / descending speed can be increased by increasing the drive on time and shortening the off time, and can be decreased by decreasing the drive on time and increasing the off time.

  The lifting / lowering of the pre-cutting processing unit 3 is performed by inputting the ground height detected by the left cutting height grounding sensor 25L and the right cutting height grounding sensor 25R to the cutting height control device 27 and from the cutting height control device 27 to the lifting cylinder 24. This is done by outputting a drive pulse to the control valve. The drive pulse is output by switching the control valve to the ascending side when either the left cutting height grounding sensor 25L or the right cutting height grounding sensor 25R is lower than the reference height, and switching to the descending side when it is higher. When the difference from the reference height becomes larger than the predetermined height difference or when it is suddenly detected outside the predetermined height allowable range in a short time, the drive pulse is continuously output or the ratio of the drive pulse is increased, The pre-cutting processing unit 3 is moved up and down quickly by increasing the expansion / contraction speed.

  Next, the turning and lifting control device for the discharge auger will be described.

  An auger turning position 32 and an auger lifting / lowering position 33 are input to the auger control device 31, and the auger turns left 34 or right turns 35 on the output side according to the auger turning position 32. The auger is raised or lowered 37 by the auger raising / lowering position 33. The auger remote control unit 38 receives switches such as an auger left 39, an auger right 40, an auger upper 41, an auger lower 42, a discharge 43, and a stop 44.

  In FIG. 4, the machine side control device 45 receives a cutting / disengaging clutch sensor 46, a discharge clutch sensor 47, a main transmission lever switch 48, a parking pedal switch 49, a speed sensor 50, an engine rotation sensor 51, and the like. Yes.

  When the automatic adjustment of the automatic sensor reference adjustment is started with the discharge auger 7 placed in the storage receiver 52, the storage position is first stored, and then automatically turns left, and then turns back to the previously stored storage position and descends. . Here, when a stop operation is performed, a predetermined backlash is subtracted and stored, and automatic storage adjustment of the auger is assisted. According to this, the backlash adjustment of the auger storage position is automatically supported, and the troublesomeness of the operator can be reduced.

  In addition, after the automatic storage position adjustment is completed, automatic right turn is started. At this time, the position where the operator first stopped is stored as the first overhang position. Here, when a left or right turning operation is detected, automatic turning is performed in the operation direction, and the position where the stop operation is performed is set as a first overhang position. According to this, it is possible to reduce the troublesomeness of the operator by supporting the storage operation and the alignment operation when adjusting the auger overhang position.

  After automatic adjustment of automatic sensor reference adjustment is completed, automatic right turn is started. At this time, the position where the worker stopped is stored as the second overhang position. Here, when a left or right turning operation is detected, automatic turning is performed in the operation direction, and the position where the stop operation is performed is set as a second overhang position. Therefore, it is possible to reduce the troublesomeness of the operator by supporting the storage operation and the alignment operation when adjusting the auger overhang position.

  In the automatic adjustment of the discharge auger turning position, the normal adjustment range is stored in advance for each control adjustment value. If the value at the time of automatic adjustment is outside the adjustment range, the adjustment failure is notified by resonance of the horn or buzzer. And convenient.

  Further, in the automatic adjustment of the discharge auger turning position, if the vehicle speed is a predetermined value or the main speed change lever is not neutral, it is possible to suppress dangerous automatic adjustment by disabling automatic adjustment.

  It is also possible to prevent automatic adjustment of the auger unless the discharge clutch of the discharge auger is being detected.

3 Pre-cutting processing unit 24 Elevating cylinder 25L Left cutting height grounding sensor 25R Right cutting height grounding sensor

Claims (3)

  In a combine that controls the pre-cutting processing part (3) provided at the front part of the vehicle body (1) by the lifting cylinder (24), the left cutting height grounding sensors (25L) are respectively provided on the left and right sides of the bottom part of the pre-cutting processing part (3). ) And a right cutting height grounding sensor (25R), and either the left cutting height grounding sensor (25L) or the right cutting height grounding sensor (25R) detects a reference cutting height or less. The cutting height control device (27) outputs an intermittent drive signal to the lifting cylinder (24) to control the cutting pre-processing unit (3) to the reference cutting height.   The frequency of the intermittent drive signal is reduced as sensor detection values of the left cutting height grounding sensor (25L) and the right cutting height grounding sensor (25R) approach the reference cutting height. Combine as described in. The frequency of the drive signal which drives the said raising / lowering cylinder (24) of the said cutting height control apparatus (27) was made finer at the time of the fall than the time of the said cutting pre-processing part (3) rising. Combine.

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