JP3985008B2 - Drive control device for harvesting pretreatment device in combine - Google Patents

Description

  The present invention relates to a drive control device for a pre-cutting device for a combine that drives or stops the pre-cutting device for a combine.

  Conventionally, for example, in Patent Document 1 or the like, at the time of harvesting and threshing work in which the pre-cutting processing device is lowered to a predetermined cutting height, the cutting clutch is automatically turned on, but the pre-cutting processing device is raised above the cutting height. It has been proposed to execute auto-clutch control that automatically turns off the mowing clutch when not in operation, and to quickly perform the mowing and threshing work in the field.

  However, since the auto-clutch control of raising the pre-cutting processing device is executed at the time of turning into the next stroke after finishing the cutting and threshing work for one stroke in the field, the cutting clutch is turned off. The power transmission to the pre-cutting processing apparatus is interrupted. As a result, the harvested culm just before the end of the first stroke remains stopped in the culm transporting part of the pre-harvest processing device, and the cereal is transferred to the cereal transporting part, particularly at the cereal spear inheritance point to the feed chain starting end. There was a problem of falling out.

At the beginning of the next stroke, the combine vehicle speed is slow, but the feed chain speed is constant. In other words, there is a problem that unhandled food is left behind, or the whole cereal pod is pulled into the handling chamber due to the rotation of the handling cylinder, increasing the threshing load and causing poor sorting.

Therefore, as in Patent Document 2, the engine power is transmitted to the pre-cutting processing device through the vehicle speed tuning drive unit when the vehicle speed is high, and through the constant rotation drive unit when the vehicle speed is low. We have proposed a configuration that enables this selection.
JP-A-7-274650 Japanese Utility Model Publication No. 6-11426

  Therefore, in order to improve the operability of the combine by a skilled operator in a large-scale field, the present inventor holds the mowing clutch on and keeps the mowing pre-treatment device constant through the constant rotational drive unit. It was considered that quick cutting conveyance control for controlling the cutting clutch to be turned off after that was driven at a high speed.

  However, if the operator mistakenly operates the quick pedal for the quick mowing transport control when the vehicle speed itself is high, the quick mowing transport control is executed, and the mowing clutch is turned off in the latter half of the control. Will occur.

  Then, there is a problem that when a skilled operator cuts and turns with the combine vehicle speed being high and enters the next stroke, an operation to turn on the cutting clutch again becomes necessary.

  The present invention has been made to solve these problems, and even if the quick harvesting conveyance control is erroneously operated during the operation of the combine by a skilled operator, an appropriate harvesting and threshing is performed according to the level of the vehicle speed. An object of the present invention is to provide a drive control device for a pre-cutting processing device in a combine that can ensure operation.

In order to achieve the above object, a drive control device for a cutting pretreatment device in a combine according to a first aspect of the present invention includes a traveling machine body having a threshing portion with a feed chain, and the cutting pretreatment device is driven up and down via a hydraulic cylinder. The power from the engine is configured to drive the cutting pretreatment device by selecting a vehicle speed tuning drive unit and a constant rotation drive unit,
A cutting clutch for connecting power from the engine to the pre-cutting processing device and a quick cutting conveyance control means are provided. When the pre-cutting processing device is lowered to a predetermined cutting height, the cutting clutch is automatically turned on. On the other hand, when the pre-cutting processing device is raised to a predetermined height higher than the cutting height, the quick mowing transport control means automatically sets the pre-cutting processing device to a predetermined level during auto clutch control that automatically turns off the cutting clutch. When raising to a height, it is detected that no culm has passed by the culm passage presence / absence sensor provided in the pre-cutting processing device, and the reaping clutch is turned on until the cereal inheritance to the feed chain is completed. Hold, drive the cutting pre-treatment device at a constant high speed via the constant rotation drive unit, and then turn off the cutting clutch Gyoshi further the quick reaping conveyance control means, wherein during automatic clutch control, when the vehicle speed is high side, pressing the reaper quick pedal, while not executing the quick cutting transport control, vehicle speed slow side When the mowing quick pedal is depressed in this state, or while the mowing quick pedal is depressed, the quick mowing conveyance control is executed.

With the above configuration, when the cutting pretreatment device is raised to a predetermined height (auto clutch control), when the vehicle speed is high, even if the operator presses the cutting quick pedal, the quick cutting conveyance control is not executed. In the case where the cutting pretreatment device is raised to a predetermined height and the vehicle speed is high, when the vehicle speed is high, “hold the cutting clutch and turn the cutting pretreatment device at a constant high speed via the constant rotation drive unit. Therefore, when the harvesting and turning are performed while the vehicle speed of the combine is kept high and the next stroke is entered, the cutting quick pedal is accidentally turned off. be operated, not the cutting clutch is OFF, the next line while reducing the immediate cutting pretreatment device to a predetermined cutting height Rapid operation can be ensured, which can reap the culms.
Conversely, in the case of increasing the cutting pretreatment device to a predetermined height, when the vehicle speed is low speed side, when the user presses the quick pedal cutting in this state, or cutting only while pressing the quick pedal, the Because quick mowing and transport control is performed, even when the field is narrow, when the road surface of the field is wet due to rain, etc., or even during harvesting and threshing operations where the vehicle speed cannot be increased due to operation by an unskilled operator, etc. There is an effect that it is possible to prevent the cereal conveyance posture from being disturbed by the pre-harvest processing device, and to prevent problems such as cereal conveyance clogging.

  Next, an embodiment embodying the present invention will be described. FIG. 1 is a side view of a traveling machine body 1 of a combine having a pair of left and right traveling devices 2 provided with a traveling crawler 2a. FIG. 3 is a side view of a lift position sensor for detecting the lift position of the machine body between the pre-cutting processing apparatus and the traveling machine body, FIG. 5 is a front view of the grain feeder of the pre-cutting process apparatus, and FIG. FIG. 7 is a functional block diagram of a hydraulic circuit and a control device.

  A threshing device 3 is mounted on the left side in the traveling direction of the traveling machine body 1, and a cutting pretreatment device 4 that can be moved up and down by a single-acting hydraulic cylinder 9 is disposed at the front of the traveling machine body 1. A clipper-type cutting blade device 5 is arranged on the lower side of the lower frame of the pre-cutting processing device 4, and a cereal groin raising device 6 for six strips is arranged on the front side. Between them, a grain culm transporting device 8 is arranged, and a weed body 10 projects in front of the lower part of the corn straw pulling device 6 (see FIGS. 2 and 5). A cab 11 is arranged at the front right side of the traveling machine body 1, and a grain tank 12 is arranged on the rear side thereof.

  As shown in FIGS. 3 and 4, the base end of a vertically downward inclined lifting cylinder frame 14 with the tip attached to the pre-cutting processing device 4 is fixed to the horizontal cylinder 15, and the horizontal cylinder 15 is attached to the front of the traveling machine body 1. A plurality of bearing brackets 16 (one of which is not shown) is pivotally supported by the shaft, and power from the engine 35 on the traveling machine body 1 is applied to the inner diameter portions of the horizontal cylinder 15 and the lifting cylinder frame 14. Power is transmitted to each part of the pre-cutting processing device 4 through the disposed transmission shafts 17 and 19, the bevel gear pair 18 and the like. Then, the cutting pretreatment device 8 is driven up and down by a lifting hydraulic cylinder 9 mounted between the middle part of the lifting cylinder frame 14 and the traveling machine body 1.

  As shown in the skeleton diagram (FIG. 6) showing the power transmission system of the combine, one of the outputs from the engine 35 is transmitted to the bottom conveyor 37 and the vertical conveyor 38 in the grain tank 12 via the clutch 36, Then, it is transmitted to a screw conveyor (not shown) in the discharge auger 28.

  Other outputs from the engine 35 are a power handling shaft 40, a sorting drive shaft 41, a driving hydraulic pump hydraulic motor type (HST type) driving drive unit 42 to a driving drive unit 42, Power is transmitted to the constant speed rotation drive shaft 44 to the pre-cutting processing device 4. In this case, a chopping clutch 49 and a threshing clutch 48 are provided in the power branching mission 39, and the power transmission from the engine 35 is turned on and off via the threshing clutch 48, and the cylinder drive shaft 40 and The handling cylinder 13 and the processing cylinder 29 via the sorting drive shaft 41, the blower fan 21a, the Kara fan 21b, the swing sorting mechanism 21c, the first receiving screw conveyor 26a, the Kara fan, the second receiving screw conveyor 26b, and The second reduction conveyor 25, the waste chain 31, the suction fan 30, and the waste cutter 33 are transmitted to the rear end of the feed chain 7 via the FC clutch 7a.

  On the other hand, the pulley of the cutting tuning drive shaft 45 that is output from the (HST type) traveling drive unit 42 from the shaft that is output via the cutting clutch 49 in the power branching mission 39 has a vehicle driving speed tuning (travel driving unit). The power is transmitted to the cutting shaft 47 via a one-way clutch 45a, a belt, and a pulley. The structure of the one-way clutch 45a is such that when the rotational speed of the cutting tuned drive shaft 45 is higher than the rotational speed of the constant speed rotary drive shaft 44, the output of the chopped synchronous drive shaft 45 is transmitted to the cutting shaft 47, and the constant speed When the rotational speed of the rotational drive shaft 44 is higher, the output from the constant speed rotational drive shaft 44 is transmitted to the cutting shaft 47.

  Therefore, when vehicle speed synchronization control is prohibited (cancelled), power is transmitted to the harvesting shaft 47 via the constant speed rotation drive shaft 44 of the power branching mission 39, and output from the HST traveling drive unit 42. When the rotational speed of the shaft 45 is lower than the rotational speed from the constant-speed rotational drive shaft 44, or when the tuned synchronous drive shaft 45 rotates in the retreat direction of the combine, the constant-speed rotational drive shaft via the one-way clutch 45a. Power is transmitted from the 44 side to the cutting shaft 47.

  In this case, the safety clutch 46 of the cutting part is provided as a tension clutch that cuts power by tensioning / releasing the tension of the belt. In order to turn ON / OFF the threshing clutch 48, the mowing clutch 49, and the FC clutch 7a, a clutch actuator such as an electromagnetic solenoid corresponding to each clutch is turned ON / OFF by a command from the controller 70. Has been.

  The HST type (in which a mechanical transmission mechanism is incorporated in a continuously variable transmission mechanism using two hydraulic motors and two hydraulic pumps) for adjusting the swash plate of each hydraulic pump of the traveling drive unit 42 to continuously change the vehicle speed. As shown in FIGS. 8 and 9, the main transmission lever 85 rotates back and forth at the side operation portion of the seat 11 a in the driver's cab 11 and moves forward with respect to a neutral position (stop position) in a substantially vertical posture. When it is tilted to the forward position, it is the forward position, and the vehicle speed increases as the inclination angle with respect to the vertical increases. When the vehicle is tilted backward, the vehicle moves backward, and the vehicle speed increases as the tilt angle increases.

  Similarly, the auxiliary speed change lever 86 disposed in the side operation portion of the seat 11a is for controlling an actuator such as a transmission motor for operating a mechanical speed change mechanism (not shown) provided in the HST traveling drive portion 42. When the sub-shift lever 86 is switched to each position in the road running mode, the standard work mode, and the low speed work mode, the microcomputer control device (controller unit) 70 mounted on the combiner instructs each work mode. The output (horsepower) and rotation speed of the traveling drive unit 42 to be adapted can be set and held within a predetermined range.

  An ultrasonic sensor 20 as a cutting height sensor for detecting the height of ground between the pre-cutting processing device 4 and the field scene and detecting the cutting height is a bracket provided on the back side of the culm raising device 6 It arrange | positions (not shown) and arrange | positions so that the transmission part (horn part) of the transmitter 20a in the ultrasonic sensor 20 and the receiving part of the receiver 20b may face a farm scene. When the installation height of the ultrasonic sensor 20 and the installation height of the cutting blade 5 are different, the cutting height detection value is obtained from the detection value of the ultrasonic sensor 20 by a predetermined conversion.

  The lift position sensor 22 is for detecting the relative height between the traveling machine body 1 and the pre-cutting processing device 4. In this embodiment, the lift position sensor 22 is fixed to the bearing bracket 16 as shown in FIGS. 3 and 4. By detecting the rotation angle θ of the horizontal cylinder 15 by bringing the sensing rotation arm 23 of the rotation potentiometer type lift position sensor 22 into contact with the sensor shaft 24 fixed to the outer surface of the horizontal cylinder 15, the lift cylinder The rotation angle of the frame 14, and hence the lifting / lowering position of the pre-cutting processing device 4 with respect to the traveling machine body 1 (to the machine lifting position) can be detected.

  FIG. 7 is a functional block diagram of a control device 70 for executing the lifting control of the cutting pretreatment device such as cutting height control and auto clutch control, the drive control of the cutting pretreatment device, and the cutting quick control of the present invention. The control device 70 is an electronic control device such as a microcomputer, and although not shown, a central processing unit (CPU) for executing various arithmetic processing and control, and a read-only memory storing a control program (ROM), read / write memory (RAM) as needed to temporarily store various detection values, data, etc., non-volatile memory for holding stored data even when the control device is turned off, a clock as a timer function, It has an interface and a bus.

  An ultrasonic wave is transmitted to the transmitter 20a in the ultrasonic sensor 20 at an appropriate time interval T1 via a transmission drive circuit 71 according to a command from the control device 70, and the reflected wave reflected by the detected object is received by the receiver. 20b, and the detection signal is input to the control device 70 via the reception amplification circuit 72. The detection signal of the elevation position sensor 22 is also input to the control device 70 via the A / D converter at each time interval T1.

  Further, a cutting height setting unit 73, a three-position detection type manual switch 76 for performing the cutting and threshing operation in the manual mode, an automatic switch 75 for setting the same operation to the automatic control mode, and further, cutting when performing the manual operation. In order to change the lifting amount and / or lifting speed of the pre-processing device 4 to a smaller side, each signal of the foot switch 74 that is turned ON / OFF by the operator stepping on with the foot is also input to the control device 70. The operating lever 76a of the manual switch 76 can be tilted back and forth and is urged so as to automatically return to the neutral position. While the operating lever 76a is tilted forward, it continues to descend at a predetermined elevation speed V1, and then tilts backward. As long as it is, it continues to rise at a predetermined elevation speed V1.

  Further, the control device 70 outputs a predetermined lift command signal to the first drive circuit 77 and the second drive circuit 78 according to a predetermined calculation result, and according to an output from the first drive circuit 77, a hydraulic circuit. 79, the electromagnetic solenoids 80a and 80b of the hydraulic switching valve 80 are operated, and the electromagnetic solenoid 50a of the electromagnetic proportional pressure reducing valve 50, which is an example of a fast response electromagnetic valve, is operated according to the output from the second drive circuit 78. The single-acting hydraulic cylinder 9 for raising and lowering the cutting pretreatment device 4 is operated.

  In the hydraulic circuit 79 shown in FIG. 7, the single-acting lifting hydraulic cylinder 9 and a pair of left and right rolling control hydraulic cylinders (not shown) for controlling the left and right relative vehicle heights of the left and right traveling devices 3 and the traveling machine body 1 are illustrated. Pressure oil is also supplied to the hydraulic control valve 51 and the like.

  In this case, as shown in FIG. 7, a relief valve 54 is inserted in the oil supply path 53 from the hydraulic pump 52 of the hydraulic circuit 79 to the hydraulic switching valve 49. A check valve 55 and a slow return check valve 56 are connected in the middle of the hydraulic pipe from the output port of the 4-port 3-position switching electromagnetic hydraulic switching valve 80 to the single-acting hydraulic cylinder 9. Note that the other hydraulic control valve 51 is configured to supply oil from the other output port of the hydraulic switching valve 80 at the same time.

  A return oil pipe 57 connected between the check valve 55 and the slow return check valve 56 of the hydraulic pipe is provided with a variable throttle valve 58 for lowering the piston rod of the single-acting hydraulic cylinder 9 and an emergency lowering valve 59 in parallel. Connecting. The variable throttle valve 58 is a 2-port 2-position switching type valve, and an output port of an electromagnetic proportional pressure reducing valve 50 as an example of the high-speed response solenoid valve is connected to the pilot port.

  Then, the operation control of the lifting hydraulic cylinder 9 of the pre-cutting processing device 4 is executed as follows. That is, when the electromagnetic hydraulic switching valve 80 is switched to extend the hydraulic cylinder 9, the electromagnetic proportional pressure reducing valve 50 adjusts the hydraulic pressure appropriately when the electromagnetic solenoid 80a is operated by pulse width modulation control (PWM). The pilot pressure acts on the variable throttle valve 58, the throttle degree of the variable throttle valve 58 is arbitrarily changed, and the oil is drained from the return oil pipe 57 to the oil tank 60. In that case, the operating speed of the hydraulic cylinder 9 is adjusted according to the throttle degree of the variable throttle valve 58.

  Further, when the hydraulic cylinder 9 is reduced, the hydraulic switching valve 80 is made neutral, the electromagnetic proportional pressure reducing valve 50 is operated by the pulse width modulation control (PWM) method as described above, and the pilot pressure is adjusted. The throttle opening of the variable throttle valve 58 is adjusted, thereby adjusting the operating speed of the hydraulic cylinder 9.

  Note that when normal mowing and threshing work is performed while the traveling machine body 1 is traveling forward (in the standard operation mode), the threshing clutch 48 and the mowing clutch 49 in the power branching mission 39 are in the ON (power connection) state. In addition, the FC clutch 7a is also ON, and the cutting shaft 47 is connected via the cutting cutting tuning drive shaft 45 of the rotational speed synchronized with the output of the traveling drive unit 42 while monitoring the detection values of the fuel injection amount sensor and the vehicle speed sensor. While driving, the cutting pretreatment device 4 is synchronously driven, and the barrel driving shaft 40 and the sorting driving shaft 41 are driven to feed the chain 7, the barrel 11, the processing barrel 29, the blower fan 21a, the tang fan 21b, and the swing. The sorting mechanism 21c and the like are driven at a constant speed.

In the manual mode, as a fine adjustment switching means for finely raising / lowering the lifting / lowering speed of the pre-cutting processing device 4 at a slow speed V2 slower than the predetermined speed V1, the foot switch 74 is turned on / off. are upwardly projected only pedal 87 to the floor plate of the left side below the seat 11a. Further, a mowing quick pedal (also referred to as a pouring pedal) 88, which will be described later, is disposed so as to protrude from the floor plate below the round handle 89, as shown in FIGS.

  In addition, as shown in FIG. 5, a pestle passage presence / absence sensor 90 for detecting the presence / absence of pestle passing is provided on the lower front end side of the culm pulling device 6 in the pre-cutting processing device 4. A handling depth sensor composed of a shallow handling position sensor 91a and a deep handling position sensor 91b, which is arranged for each passing place of the straw and is provided at a place where the wheat straw is transferred from the grain feeder 8 to the feed chain 7 of the pre-cutting device 4. 91 is arranged, control of cutting and threshing is started when the culm passage presence / absence sensor 90 is ON, and when all (three) culm passage presence / absence sensors 90 are OFF (no culm passage), control of the end of cutting Execute. In the handling depth sensor 91, the cedar inheritance adjusting unit 8a from the cereal carrying device 8 to the start end of the feed chain 7 is operated so as to have a normally set handling depth.

  In this configuration, when cutting and threshing work in the field, in the automatic clutch control, when the pre-cutting processing device 4 is lowered to a predetermined cutting height, the cutting clutch 49 is automatically turned on, while the pre-cutting processing device 4 is When it is raised to a predetermined height higher than the cutting height, the cutting clutch 49 is automatically turned off. Further, when the cutting pretreatment device 4 is lifted by a cutting height adjustment lever or an auto lift button (attached to the grip portion of the main transmission lever 85), the driving of the cutting pretreatment device 4 is stopped, and the feed chain 7 The drive is stopped. Conversely, when the pre-cutting processing device 4 is lowered by the cutting height adjusting lever or the auto lift button, the pre-cutting processing device 4 and the feed chain 7 are driven.

  Even when the traveling machine body 1 is stopped or retracted when the traveling machine body is turned in the middle of the harvesting and threshing operation in the field, the output of the cutting tuned drive shaft 45 is processed before cutting by the action of the one-way clutch 45a. It is not transmitted to the device 4 side. In this case, when the pre-cutting processing device 4 is raised to a predetermined height or higher than the cutting height by automatic clutch control, the cutting clutch 49 is turned off, and the pre-cutting processing device 4 and the feed chain 7 are driven. Stops. Even if the operator manually turns off the FC clutch 7a, the feed chain 7 stops rotating.

  And, as described above, if at least the harvesting clutch 49 is turned off until the next stroke is finished after the first stroke of the harvesting and threshing operation in the field, the vicinity of the end of the first stroke of the harvesting and threshing Since the cereals harvested in step 1 are still being transported in the culm transporting device 8 in the pre-harvest pretreatment device 4, the transport is stopped, so when entering the next stroke, when the driving speed of the preharvest processing device 4 is slow, There was an inconvenience that, for example, the inheritance action to the feed chain 7 became unstable, and the cereals spilled from the conveyance site.

  Therefore, control is performed so that the cereals on the pre-cutting processing device 4 side are sent to the feed chain 7 side. In the first embodiment, the pre-cutting process is performed even if the auto clutch control is executed. When the device 4 is raised to a predetermined height, it is detected that there is no passage of the culm by the culm passage sensor 90 and the cereal transfer to the feed chain is completed, that is, the transport of the culm in the pre-cutting processing device 4 The time required for passing is stored in advance, and the mowing clutch 49 is kept ON until the predetermined time elapses, and the power from the engine 35 is mowing through the constant speed rotation drive shaft 44 of the power branching transmission 39. Power is transmitted to the shaft 47, the cutting pretreatment device 4 is driven at a constant high speed, and then quick cutting conveyance control is performed so that the cutting clutch 49 is turned off. .

  In the second embodiment, when the pre-cutting device 4 is raised to a predetermined height, if no culm passing is detected by the culm passing presence / absence sensor 90, until the detected value is not detected by the handling depth sensor 91. During this time, the mowing clutch 49 is kept ON, and the power from the engine 35 is transmitted to the mowing shaft 47 via the constant speed rotation driving shaft 44 of the power branching mission 39 as a constant rotation driving portion. The device 4 is driven at a constant high speed, and then quick cutting conveyance control is performed so that the cutting clutch 49 is turned off.

In the auto clutch control, when the vehicle speed is on the high speed side, that is, when the rotational speed of the cutting tuning drive shaft 45 from the traveling drive unit 42 is high (the main transmission lever 85 is tilted to a high speed side above a predetermined value, or in a case where it is set) the auxiliary shift lever 86 to the high-speed side, also referred to as cutting preparative quick pedal (pouring pedal) by pressing the 88, the quick reaping conveyance control is not executed. When the vehicle speed is low speed side, when the user presses the quick pedal 88 cutting in this state, or cutting only while pressing the quick pedal 88, the quick reaping conveyance control may be executed.

  Needless to say, while the quick harvesting conveyance control is being executed, the FC clutch 7a is kept ON, and the threshing clutch 48 is also ON, so that the threshing unit 3 is driven.

As described above, when the vehicle speed is high, even if the operator presses the cutting quick pedal, the quick cutting conveyance control is not executed, that is, when the vehicle speed is high, “hold the cutting clutch ON, Since the control of driving the cutting pre-processing device at a constant high speed via the constant rotation driving unit and then turning off the cutting clutch is not executed, the cutting and When turning and entering the next stroke, even if you accidentally operate the mowing quick pedal, the mowing clutch will not be turned off, and immediately after lowering the mowing pretreatment device to the predetermined mowing height, It is possible to secure a quick operation that can harvest cereals.
Conversely, when the vehicle speed is low speed side, when the user presses the quick pedal cutting in this state, or cutting only while pressing the quick pedal, the because of the quick cutting conveyance control is executed, the field Even when the road surface is wet due to narrowness, after rain, etc., or during harvesting and threshing operations where the vehicle speed cannot be increased due to operation by an unskilled operator, etc. There is an effect that it is possible to prevent the occurrence of problems such as clogging of the bag.

  Thus, according to the present embodiment, even when the auto-clutch control of raising the pre-cutting processing device is performed at the time of turning to finish the cutting and threshing work for one stroke and enter the next stroke, The harvesting clutch is not turned off, and the harvested culm just before the end of one stroke is transported to the feed chain without stopping at the culm transporting part of the pre-harvest processing device, and the threshing is executed. In particular, there is an effect that it is possible to eliminate the disadvantage that the cereals fall off at the cereal inheritance point to the feed chain starting end.

  In addition, at the beginning of the next stroke, the combine speed is slow, but the speed of the feed chain is constant. Misalignment of the pinch in the longitudinal direction is likely to occur, causing unhandled handling in the handling cylinder, or the entire cereal basket is pulled out into the handling chamber due to rotation of the handling cylinder, increasing the threshing load and causing poor sorting There is an effect that the problem of occurrence can be solved.

It is a side view of a combine. It is a top view of a combine. It is a side view which shows the attachment position of a position sensor. It is a top view which shows the attachment position of a position sensor. It is a front view which shows each arrangement | positioning relationship of the culm raising apparatus in the pre-harvest processing device, the culm conveying device, the culm passage presence / absence sensor, and the handling depth sensor. It is a skeleton figure of a power transmission system. It is a functional block diagram of a hydraulic circuit and a control means. It is a top view inside a driver's cab. It is a side view of a driver's cab.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Traveling machine body 4 Cutting pre-processing apparatus 7 Feed chain 7a FC clutch 9 Lifting hydraulic cylinder 22 Lifting position sensor 42 Traveling drive part 48 Threshing clutch 49 Cutting clutch 50 Electromagnetic proportional pressure reducing valve 70 Control apparatus (control means)
73 Cutting height setting device 80 Hydraulic selector valve 88 Cutting quick pedal

Claims (1)

Attach the cutting pretreatment device to the traveling machine body equipped with a threshing section with a feed chain so as to drive up and down via a hydraulic cylinder,
While configuring the power from the engine to drive the cutting pretreatment device by selecting a vehicle speed tuning drive unit and a constant rotation drive unit,
A cutting clutch for connecting the power from the engine to the cutting pre-treatment device, and a quick cutting conveyance control means;
When the pre-cutting device is lowered to a predetermined cutting height, the cutting clutch is automatically turned on. On the other hand, when the pre-cutting device is raised to a predetermined height higher than the cutting height, the cutting clutch is automatically turned off. During auto clutch control
The quick mowing conveyance control means detects when there is no culm passing by a pestle passing presence / absence sensor provided in the pre-harvest processing device when raising the pre-harvest processing device to a predetermined height, and the grain to the feed chain Until the spear inheritance is completed, the mowing clutch is kept ON, the mowing pre-treatment device is driven at a constant high speed via the constant rotation driving unit, and then the mowing clutch is turned off. Control
Further, when the vehicle speed is on the high speed side during the auto clutch control , the quick cutting conveyance control means does not execute the quick cutting conveyance control even if the cutting quick pedal is pressed, while the vehicle speed is on the low speed side. The drive control device for the pre-cutting processing device in the combine, wherein the quick cutting transport control is executed only when the cutting quick pedal is pressed in this state or while the cutting quick pedal is pressed.

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