JP3881000B2 - Lifting / driving control device for harvesting pretreatment device in combine - Google Patents

Description

  The present invention relates to a combine, and more specifically, a lifting / driving control device for a pre-cutting processing device in a combine that moves a pre-cutting processing device in an automatic mode and a manual mode to perform a cutting and threshing operation. Concerning configuration.

  Conventionally, for example, in Patent Document 1 and the like, during a cutting and threshing operation, the cutting clutch is automatically turned on when the cutting pretreatment device is lowered to a predetermined cutting height (second setting height) set in advance. In addition, even if the harvesting is finished in one stroke, it is necessary to drive the pre-cutting processing device while conveying the cut cereal to the threshing unit. Automatic clutch control that automatically turns off the harvesting clutch when it is raised to a predetermined height (first set height) that is equal to or higher than the trimming height can be performed quickly in the field. Proposed.

In addition, a three-position detection type manual switch is connected to the lifting / driving control device of this cutting pre-processing device, and is set in advance only while this manual switch is operated to the ascending position or the descending position. The cutting pre-treatment device is moved up and down at a rising / lowering speed so as to enter a manual mode.
JP-A-7-274650

  Therefore, in the lifting / driving control device, in the manual mode, the restriction of ON or OFF of the cutting clutch at the preset predetermined cutting height position is removed. There is a problem that the lifting operation of the pre-cutting device and the operation for turning on / off the cutting clutch have to be executed almost simultaneously, which is troublesome.

  Furthermore, in the cutting work at the portion along the heel or in the corner of the field, the chopping work must be performed in a state where the lower end of the side of the pre-cutting processing device does not collide with the side of the ridge. In this case, the first set height at which the cutting clutch is switched from ON to OFF during the up stroke of the pre-cutting device is higher than the second set height at which the cutting clutch is switched from OFF to ON during the down stroke of the pre-cutting device. The first set height and the second set height should be different from the first set height and the second set height in the normal auto clutch control (automatic mode), respectively. In the conventional technique, the lifting / lowering operation and the cutting clutch are turned on / off in the manual mode depending on the intuition of the operator (operator).

  In the present invention, in view of the problems of the related art, the combine that can efficiently perform the cutting and threshing work according to the field condition by allowing the first set height and the second set height to be set even in the manual mode. It is an object of the present invention to provide a lifting / driving control device for a cutting pretreatment device.

In order to achieve the above object, the lifting / driving control device for the pre-cutting processing device in the combine according to the first aspect of the present invention drives the pre-cutting processing device up and down with respect to the traveling machine body through the lifting drive means, In the combine configured to transmit the power from the engine to the pre-cutting processing device via the cutting clutch, the cutting clutch is turned from ON to OFF at the first set height position in the ascent process of the pre-cutting device. The lowering / driving control device for controlling the cutting clutch to be switched from OFF to ON at a second set height position lower than the first set height position, Mode switching means for switching the elevation / drive control between the automatic mode and the manual mode, and when the mode switching means is switched to the manual mode, at least Preparative by pretreatment slower crawling speed rate than the predetermined speed V1 the lowering speed of the device V2, is provided with a depression pedal for lowering operation only during the pressing.

According to a second aspect of the present invention, in the lifting / driving control device for the pre-cutting processing apparatus in the combine according to the first aspect, the stepping pedal is a pre-cutting process when the mode switching means is switched to the manual mode. The lifting / lowering speed of the apparatus is raised / lowered only at the slow speed V2 slower than the predetermined speed V1.

  The lifting / driving control device for the pre-cutting processing device in the combine according to claim 1 drives the cutting pre-processing device up and down with respect to the traveling machine body through the lifting drive means, and also uses the power from the engine as a cutting clutch. In the combine configured to transmit to the pre-harvest processing device via the chopping pre-processing device, in the ascending stroke of the pre-cutting device, the mowing clutch is switched from ON to OFF at the first set height position. In the lowering stroke, the lifting / driving control device for controlling the cutting clutch to be switched from OFF to ON at the second set height position lower than the first set height position, and the lifting / driving control in the automatic mode. And a mode switching means for switching to the manual mode.

  With this configuration, in both the automatic mode and the manual mode, the first set height position for switching the mowing clutch from ON to OFF in the ascent process of the mowing pretreatment device, and the mowing pretreatment device The second setting height position lower than the first setting height position for switching the cutting clutch from OFF to ON in the descending stroke can be set by the height position setting means, and in the cutting work at the end Even in the manual mode, there is an effect that the lifting / lowering operation of the pre-cutting processing apparatus and the accompanying ON / OFF operation of driving of the pre-cutting processing apparatus can be executed safely and reliably without depending on the skill and intuition of the operator.

In the present invention, when the mode switching means is switched to the manual mode, at least the lowering speed of the pre-cutting processing device is lowered at a very low speed V2 lower than the predetermined speed V1 only during the depression . Since the step pedal is provided, in the state where the mode switching means is switched to the manual mode, the cutting pretreatment device is operated at a predetermined speed, and if the step pedal is operated (pressed) during the operation, During this period, the cutting pre-processing device is controlled to move down at a very low speed, so that the operator enters the manual mode by operating the mode switching means and moves it up and down at a predetermined speed as appropriate. by operating the operator depresses pedal before the height, since it is the switching operation so as to lower the pretreatment device cutting at very low speed To set the target height pretreatment apparatus reaper an effect that is extremely easy.

According to a second aspect of the present invention, when the stepping pedal switches the mode switching means to the manual mode, the stepping-up speed of the pre-cutting processing device is set at a very low speed V2 lower than the predetermined speed V1. Since the lifting / lowering operation is performed only while the button is pressed, there is an effect that it becomes easier to set the pre-cutting processing device to the target height.

  Next, an embodiment embodying the present invention will be described. FIG. 1 is a side view of a combined traveling machine body 1 having a pair of left and right traveling apparatuses 2 provided with a traveling crawler 2a, FIG. 2 is a plan view of the traveling apparatus body 1, and FIG. FIG. 5 is a side view of a lift position sensor for detecting the lift position of the machine body, FIG. 5 is a skeleton diagram of power transmission, and FIG. 6 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 the two, a cereal haul conveying device 8 is arranged, and a weed body 10 protrudes in front of the lower portion of the cereal haul raising device 6. 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. 5) 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. The other output from the engine 35 is used to turn on / off the power transmission via the threshing clutch 48 a in the power branching mission 39, and the handling cylinder 13 via the handling cylinder drive shaft 40 or the sorting drive shaft 41. And the processing drum 29, the first receiving screw conveyor 26 a, the tang fan, the second receiving screw screw 26 b and the second reducing conveyor 25, the waste chain 31, the suction fan 30 and the waste cutter 33.

  On the other hand, power is transmitted from the harvesting drive shaft 45 output from the (HST type) travel drive unit 42 to the harvesting shaft 47 via the one-way clutch 45a and the synchronization clutch 46 (which can be transmitted only during forward rotation of the travel drive unit). And transmit directly to the feed chain 7. Further, the power transmission to the pre-cutting processing device 4 is turned ON / OFF via a cutting clutch 49 provided on the cutting shaft 47. In order to turn ON / OFF the threshing clutch 48a, the tuning clutch 46, the inflow clutch 48, and the mowing clutch 49, a clutch actuator such as an electromagnetic solenoid corresponding to each clutch is turned ON / OFF. . The synchronization clutch 46 may be a tension clutch that cuts power by tensioning / relaxing the belt tension. Therefore, as will be described later, when prohibiting (stopping) the vehicle speed synchronization control, power is transmitted to the cutting shaft 47 via the constant speed rotation drive shaft 44 of the power branching mission 39, and from the HST traveling drive unit 42. The one-way clutch 45a idles when the rotational speed of the reaping synchronized driving shaft 45 to be output is lower than the rotational speed from the constant speed rotational driving shaft 44 or when the reaping synchronized driving shaft 45 rotates in the reverse direction of the combine. .

  The vehicle speed is steplessly changed by adjusting the swash plate of each hydraulic pump or the like of the travel drive unit 42, which is of the HST type (a mechanical transmission mechanism incorporated in a stepless transmission mechanism using two hydraulic motors and two hydraulic pumps). As shown in FIGS. 7 and 8, the main speed change lever 85 is rotated back and forth at the side operation portion of the seat 11a in the driver's cab 11 so as to be in a substantially vertical neutral position (stop position). When it is tilted forward, 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.

  When normal mowing and threshing work is performed while the traveling machine body 1 is traveling forward (in the low speed work mode and the standard work mode), the inflow clutch 48 in the power branching mission 39 is turned off (power cut off). The threshing clutch 48a, the tuning clutch 46 and the reaping clutch 49 are turned on (power connection), and while monitoring the detected values of the fuel injection amount sensor and the vehicle speed sensor, the rotational speed synchronized with the output of the traveling drive unit 42 is adjusted. The cutting shaft 47 is driven via the cutting tuning drive shaft 45 to drive the cutting pretreatment device 4 and the feed chain 7 synchronously, while the barrel driving shaft 40 and the sorting driving shaft 41 are driven to handle the barrel 11 and the processing cylinder. 29, the blower fan 20, the tang fan 19, the swing sorting mechanism 15 and the like are driven.

  Further, when the traveling machine body is changed in direction during cutting and threshing work in the field, when the traveling machine body 1 is stopped or retracted, when the driving of the cutting pretreatment device 4 and the feed chain 7 is stopped, the synchronization clutch 46 and the inflow clutch 48 are turned OFF. To drive only the feed chain 7, the cutting clutch 49 is turned off. In this case, there is no power transmission to the pre-cutting processing device 4, and power is transmitted only from the power branching mission 39 to the feed chain 7 via the cutting shaft 47.

  The ultrasonic sensor 20 as a non-contact type cutting height sensor for detecting the cutting height by detecting the height between the pre-cutting processing device 4 and the field scene is provided on the back side of the culm raising device 6. It arrange | positions at the provided bracket (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 as shown in FIG. To do. 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 as the relative lift position detecting means is for detecting the relative height between the traveling machine body 1 and the pre-cutting processing device 4, and in this embodiment, as shown in FIGS. Then, the sensing rotary arm 23 of the rotary potentiometer type lift position sensor 22 fixed to the bearing bracket 16 is brought into contact with the sensor shaft 24 fixed to the outer surface of the horizontal cylinder 15, and the rotation angle θ of the horizontal cylinder 15 is set. By detecting, the rotation angle of the elevating cylinder frame 14 and, in turn, the elevating position of the pre-cutting processing device 4 with respect to the traveling machine body 1 (to the machine elevating position) can be detected.

  FIG. 6 is a functional block diagram of a control device 70 for executing cutting height control and auto clutch control. The control device 70 is an electronic control device such as a microcomputer, and although not shown, various arithmetic processes are performed. And central processing unit (CPU) for executing control, read-only memory (ROM) storing a control program, various read / write memory (RAM) for temporarily storing various detection values, data, etc., control A nonvolatile memory for holding stored data even when the apparatus is turned off, a clock as a timer function, an interface, a bus, and the like are provided.

  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 three-position detection type manual switch 76 for performing the cutting and threshing operation in the manual mode, the automatic switch 75 as an auto lift switch for similarly setting the cutting and threshing operation to the automatic control mode (auto clutch control mode), In order to change the lifting amount and / or the lifting speed of the pre-cutting processing device 4 to a smaller side when executed in step 1, each signal of the foot switch 74 that the operator steps on and turns on / off is also input to the control device 70, respectively. The Furthermore, the first set height H1 in the automatic mode (a position at which the cutting clutch is switched from ON to OFF during the upstroke of the pre-cutting processing device 4) and the second set height H2 (the downstroke of the pre-cutting processing device). A first height setting unit 73a for setting the cutting clutch at the time of switching from OFF to ON and allowing the operator to change the first setting height H3 (processing before cutting) in the manual mode A position at which the cutting clutch is switched from ON to OFF during the ascending stroke of the device 4) and a second set height H4 (a position at which the cutting clutch is switched from OFF to ON during the descending stroke of the pre-cutting device), respectively. In addition, a second height setter 73b for enabling the operator to change is provided in the operating section (operating room 11) (see FIG. 9). The first height setter 73a and the second height setter 73b are composed of variable resistors or the like, and are connected to the control device 70 via an A / D converter (not shown). The operator can change and adjust the set height values respectively set by the setting device 73a and the second height setting device 73b, and the changed setting height values are written and stored in the EEPROM. 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. In automatic mode, you may raise / lower at the same raising / lowering speed V1 as mentioned above or faster.

In the manual mode, the fine adjustment switching means for finely raising and lowering the lifting speed of the pre-cutting processing device 4 at the slow speed V2 slower than the predetermined speed V1 is for turning the foot switch 74 on and off. the stepping write-pedal 87 are upwardly protruding floor of the left side below the seat 11a, as shown in FIGS. Incidentally, Bae Da Le 88 pouring to ON · OFF the pouring clutch 48 are arranged to protrude floor below the round handle 89.

  Further, the control device 70 outputs a predetermined raising / lowering command signal to the first drive circuit 77 and the second drive circuit 78 according to a predetermined calculation result to be described later, and according to an output from the first drive circuit 77. The electromagnetic solenoids 80a and 80b of the hydraulic switching valve 80 in the hydraulic circuit 79 are operated, while the electromagnetic solenoid 50a of the electromagnetic proportional pressure reducing valve 50, which is an example of a fast response electromagnetic valve, is operated in accordance with the output from the second drive circuit 78. Thus, 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. 5, a pair of left and right rolling control hydraulic cylinders (not shown) for controlling the single-acting lift hydraulic cylinder 9 and the left and right relative vehicle heights of the left and right traveling devices 3 and the traveling machine body 1. Pressure oil is also supplied to the hydraulic control valve 51 and the like.

  In this case, as shown in FIG. 5, 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.

  Next, an aspect of the lifting / driving control of the pre-cutting processing device 4 will be described.

  The flowchart shown in FIG. 10 is a step of reading the first set height and the second set height set by the first height setter 73a and the second height setter 73b. When turned on, the automatic mode is set (S1: yes). At this time, the values of the first set height H1 and the second set height H2 set by the first height setter 73a and stored in a predetermined memory unit are used. Read (S2). If no in S1, it is determined whether or not the manual switch 76 is ON (S3). If the manual switch 76 is ON, that is, if it is in the manual mode (S3: yes), the setting is made by the second height setting unit 73b. Then, the values of the first set height H3 and the second set height H4 stored in the predetermined memory unit are read (S4).

  Next, the operation of lifting / driving control of the pre-cutting processing device 4 in the automatic mode will be described with reference to the flowchart of FIG.

  During the automatic mode control, first, it is determined whether or not the pre-cutting processing device 4 is moving up (S10). When the operator depresses an auto lift switch or the like prior to turning after cutting one stroke in the field of the combine, the operation is performed to raise the pre-cutting processing device 4. If this rise is determined (S10: yes), the pre-cutting processing device 4 is raised at a predetermined speed V1 or the like (S11), and then whether or not the ultrasonic sensor 20 has reached the first set height H1 is determined. It discriminate | determines with a detected value (S12). If the first set height H1 is reached (S12: yes), the lift is stopped (S13). If the first set height H1 is not reached (S12: no), the drive is continued. After the lift stop (S13), an ON / OFF state of a culm sensor (not shown) provided in the cereal conveyance path to the feed chain of the pre-cutting processing device 4 is determined (S14), When the detected value is OFF (the state in which there is no cereal to be conveyed) (S14: yes), the cutting clutch 49 is turned OFF and the driving of the pre-cutting processing device 4 is stopped (S15).

  On the other hand, if it is not ascending (S10: no), it is determined whether or not it is descending (S16), and the operator turns to enter the next cutting process by turning after the first harvesting in the combine field. When the auto-set switch is pressed, the pre-cutting processing device 4 enters a lowering operation. If it is determined that this is the lowering (S16: yes), the pre-cutting processing device 4 is lowered at a predetermined speed V1 or the like (S17). Next, whether or not the second set height H2 (H2 <H1) has been reached is determined based on the detection value of the ultrasonic sensor 20 (S18). When the second set height H2 is reached (S18: yes), the descent is stopped and the cutting clutch 49 is turned on (S19), and cutting is started. If the second set height H2 has not been reached (S18: no), the descent drive is continued.

  Next, the operation of lifting control of the pre-cutting processing device 4 in the manual mode will be described with reference to the flowchart of FIG. When harvesting the grain pods at the time of cutting or when cutting the corners of the field, it is usually done in manual mode.

It is determined whether or not the manual switch 76 is in the raised position or the lowered position (S20, S21). When the manual switch 76 is in the raised position (S20: yes) and when it is in the lowered position (S21: yes) Then, the hydraulic cylinder 9 is driven up (S22) or down (S23) to operate the pre-cutting device 4 at a predetermined speed V1 (for example, an operating speed in a state in which the electromagnetic solenoid is continuously excited). Then, on its way, whether pressed Bae Da Le 87 operator depresses, in other words, it determines whether or not the foot switch 74 is ON (S24, S25).

When the foot switch 74 is in a state to ON, i.e., as the operator operates the fine adjustment switching means, when the user presses the depression Bae Da Le 87 (S24: yes, S25: yes), only during the depression creeping speed The cutting pre-processing device 4 is raised or lowered at the speed V2 (the raising or lowering corresponds to the raising or lowering position of the manual switch 76) (S26, S27). The slow speed V2 is to operate the hydraulic cylinder 9 by the pulse width modulation control (PWM) method, and V2 is set to about 1/3 to 1/5 of V1. Therefore, enters the manual mode by the operation of the operator of the manual switch 76, it is raised and lowered at an appropriate fast speed V1, by pressing the pair Da Le 87 operator depresses before the target cutting height, cutting pretreatment device with a very low speed Since the switching operation can be performed so as to raise and lower 4, it becomes extremely easy to set the pre-cutting processing device 4 to the target height.

On the other hand, when the foot switch 74 is in a state OFF, the words, as if the operator does not operate the fine adjustment switching means, when not depressed depression Bae Da Le 87 (S24: no, S25: no), the predetermined The up / down driving at the speed V1 is maintained.

  Next, when rising (S20: yes), it is determined whether or not the first set height H3 (normally higher than H1) has been reached (S28), and if it has reached the first set height H3 ( S28: yes), the ascending drive is stopped (S29), and then the ON / OFF state of the culm sensor is discriminated in the same manner as described above (S30). In a state where there is no wrinkle (S30: yes), the cutting clutch 49 is turned off and the driving of the pre-cutting device 4 is stopped (S31).

  During the lowering of the pre-cutting processing device 4 (S21: yes), it is determined whether or not the second set height H4 has been reached (S32), and the second set height H4 (normally higher than H2) is reached. If so (S32: yes), the ascent drive is stopped and the mowing clutch 49 is turned off to stop the mowing pretreatment device 4 (S33).

  As described above, in both the automatic mode and the manual mode, the first set height position for switching the cutting clutch from ON to OFF in the ascent process of the cutting pretreatment device and the lowering of the cutting pretreatment device. Since the second setting height position lower than the first setting height position for switching the cutting clutch from OFF to ON in the stroke can be set by the height position setting means, in the manual mode In addition, there is an effect that the lifting / lowering operation of the pre-cutting processing device and the accompanying ON / OFF operation of the driving of the pre-cutting processing device can be executed safely and reliably without depending on the skill and intuition of the operator.

  In addition, since the operator can change the first set height position and the second set height position using height setters 73a and 73b as height position setting means, the conditions, forms, etc. of the field can be changed. There is an effect that appropriate cutting can be reliably performed according to the situation.

If the set values of the speeds V1 and V2 and the values of the H1, H2, H3, and H4 are stored in the non-volatile memory, the previous conditions can be easily restored at the start-up again even if the combine power is turned off. There is an effect that can be. Moreover, although the ultrasonic sensor 20 as a cutting height sensor is used for the detection of the cutting height, the set height of the lifting and the lifting movement distance (lifting amount), the pre-cutting processing device 4 moves up and down. However, when it is determined that there is an abnormal situation in which the detection value of the ultrasonic sensor 20 does not fluctuate, the detection value of the lift position sensor 22 as a relative lift position detection means of the pre-cutting processing device 4 with respect to the traveling machine body. If the elevating / driving control of the cutting pretreatment device is executed by comparing with the first set height position and the second set height position, the unstable detection result of the ultrasonic sensor 20 is complemented. This is advantageous in that the control is more stable.

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 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. It is a partially cutaway perspective view inside the cab. It is a flowchart which shows the process of the data of 1st setting height H1, H3 and 2nd setting height H2, H4. It is a flowchart of raising / lowering and drive control of the cutting pre-processing apparatus in automatic mode. It is a flowchart of the raising / lowering and drive control of the cutting pre-processing apparatus in manual mode.

Explanation of symbols

1 traveling machine body 4 cutting pretreatment device 9 elevating hydraulic cylinder 20 ultrasonic sensor 22 lifting position sensor 48 reaper clutch 50 solenoid proportional pressure reducing valve 70 control device 73a, 73b height setter 74 full Ttope Da Le 75 automatic switch 76 manual switch 80 hydraulic switching valve 8 7 depression Bae da Le

Claims (2)

In the combine configured to drive the cutting pre-treatment device to the traveling machine body through the lifting drive means and to transmit the power from the engine to the cutting pre-treatment device via the cutting clutch,
In the upstroke of the pre-cutting device, the cutting clutch is switched from ON to OFF at the first set height position, and in the downstroke of the pre-cutting device, the second set height that is lower than the first set height position. A lifting / driving control device for controlling the cutting clutch to be switched from OFF to ON at the position;
Mode switching means for switching the lifting / driving control between an automatic mode and a manual mode;
When the mode switching means is switched to the manual mode, there is provided a stepping pedal for lowering the descent speed of the pre-cutting processing device at least at a very low speed V2 lower than the predetermined speed V1 only during the depression. Lifting / driving control device for a cutting pre-processing device in a combine. When the mode switching means is switched to the manual mode, the stepping pedal moves the lifting / lowering speed of the pre-cutting processing device at a very low speed V2 slower than the predetermined speed V1 only during the pressing thereof. The lifting / driving control device for the pre-cutting processing device in the combine according to claim 1.

Images