JP6914130B2 - combine - Google Patents

Description

The present invention relates to a combine that synchronizes the drive speed of the cutting unit with the drive speed of the traveling device and drives the cutting unit that has stopped due to the stop of traveling or the reverse movement by an artificial forced scraping command.

Combines that harvest rice and wheat are harvested by raising the fluffy culms in the field, and the harvested culms are scraped and transported backward while adjusting the handling depth, and transported from the harvesting section. The culms to be harvested are taken over and threshed and sorted. Among them, the paddy is stored in a grain tank or a paddy bag, and straw dust and dust are discharged to the outside of the machine.

In addition, when harvesting with such a combine, a suitable forward running speed is selected according to the cutting material conditions and the like, and the culm culms in the field are cut. Then, in this case, the cutting section reliably raises the fluffy culm and cuts it, and in order to deliver the culm to the threshing section without spilling the culm or disturbing the transport posture, the driving speed of the cutting section is used to drive the traveling device. It increases / decreases (synchronizes) according to the speed, thereby reducing the head loss in the cutting section.

However, if the driving speed of the cutting section is increased or decreased according to the driving speed of the traveling device in this way, for example, if the corners of the four corners of the field are cut at a low speed, the driving speed of the cutting section is too slow and the culm is raised. However, the performance and cutting performance may deteriorate and the culm posture may be disturbed. In addition, if the tip of the weed body and the ridge are cut at the edge of the ridge until they hit or do not hit, new culms will not be supplied at the end of the cutting, resulting in insufficient scraping and culm spillage. Become.

Then, when the combine is stopped after cutting, the driving of the cutting section is stopped accordingly. Therefore, the culm immediately after cutting remains in the cutting section without being transported to the threshing section. Further, if the combine is continuously moved backward while leaving the culm in the cutting section in this way, the holding of the culm remaining in the cutting section becomes unstable, and the culm may spill.

Therefore, a transmission for changing the driving speed of the cutting unit and a control device for controlling the transmission based on the traveling speed of the machine body are provided, and the transmission is provided so as to synchronize the driving speed of the cutting unit with the traveling speed during the cutting operation. In addition to controlling the speed, a forced scraping command is issued by artificial operation to drive the cutting section regardless of whether the combine is stopped or moved backward, and the driving speed of the cutting section is relatively high during this forced scraping. A combine having a predetermined forced scraping speed has been developed (see, for example, Patent Documents 1 and 2).

Japanese Patent No. 3853216 Japanese Patent No. 3756120

In the combine described in the above patent document, when cutting until the tip of the weed body and the ridge are barely hit or not hit by corner cutting at the four corners of the field, the driving speed of the cutting part is relatively high when a forced scraping command is issued. It becomes possible to sufficiently squeeze the culm under a proper standing posture at high speed, and the culm spillage is less likely to occur here.

In addition, when the combine is stopped by cutting to the very limit of the ridge, the cutting section is driven when a forced scraping command is issued, and all the culms immediately after cutting are transported to the threshing section. Head loss such as culm spills can be eliminated, and the combine can be moved backward without any worries.

And since this forced scraping command can be issued at any time by artificial operation, for example, the cutting part is raised to the ascending position where the cutting part is in a non-working posture because the cutting at the ridge is finished and the next work is rushed. It is conceivable to issue a forced squeeze command while letting the squeeze, or to issue a forced squeeze command together with the reverse operation.

However, when the cutting section is raised to the non-working posture, the position of the grain culm takeover section between the cutting section and the grain removal section changes, and the grain culm takeover position changes significantly, and the cutting section is driven in this state. When the culm at the end of cutting reaches the takeover part, this culm layer is sparse and extremely thin, so the holding force of the culm is reduced and there is a risk that culm spillage will occur at this takeover part. ..

Therefore, in view of the above problems, the present invention considers the space between the harvesting section and the threshing section when the cutting section is driven by a forced scraping command while raising the cutting section to an ascending position in a non-working posture. The object is to provide a combine that can prevent culm spillage at the culm transfer section as much as possible.

The present invention, order to solve the above problems, a reaper for conveying the culms that remove all laminae rearward, a threshing unit which takes over the culms conveyed from the harvesting unit, a steering unit comprising a driver's seat, reaper In a combine equipped with a control device for performing various controls, the control unit is provided with a multi-steering lever for maneuvering the aircraft and raising and lowering the cutting unit, and a main speed change lever for operating the traveling HST. The grip is provided with a forced suction switch, and the control device drives the cutting unit in synchronization with the traveling speed and ascending / descending control that controls the cutting unit to a descending position that is a working posture and an ascending position that is a non-working posture. In addition, when a forced scraping command is issued by a pushing operation of the forced scraping switch in the working posture of the cutting section to drive the cutting section regardless of running stop or reverse movement, the cutting section is operated. It is characterized in that it is allowed to ascend to the regulated position set by, and the ascent to the ascending position which is the non-working posture of the cutting part beyond this regulated position is regulated.

According to the combine of the present invention, the control device that controls various cutting parts is synchronized with the traveling speed and the raising / lowering control that controls the cutting part to the lowering position that is the working posture and the rising position that is the non-working posture. When the shift control is performed to drive the harvester, and when a forced scraping command is issued in the working posture of the harvester to drive the harvester regardless of whether the vehicle is stopped or moved backward, the harvester is in a non-working posture. Since the ascent to the ascending position is regulated, it is possible to prevent the spillage at the grain harvesting section between the harvesting section and the threshing section as much as possible.

That is, even if the cutting part is raised to the ascending position in which the cutting part is in the non-working posture because the work is rushed, or even if the cutting part is driven by the forced scraping command while operating backward, the cutting part is moved to the ascending position in which the cutting part is in the non-working posture. Since the ascent of the culm is regulated and the culm does not rise to the ascending position where it is in a non-working posture, the culm at the end where the culm has been cut by driving the culm in this state reaches the takeover part, and is sparse and extremely thin. becomes even culms of gripping force of the culms is lowered, it is possible to take over the proper threshing unit not spill culm without significantly changing the takeover position cereal culm.

In addition, the control device allows the cutting unit to rise to the regulated position set by the cutting unit when a forced scraping command is issued in the working posture of the cutting unit to drive the cutting unit regardless of whether the vehicle is stopped or moved backward. However, if the climbing beyond this regulation position is restricted, the position of the culm takeover part between the cutting part and the threshing part will change slightly, but the culm will not spill without significantly changing the culm takeover posture. It can be properly taken over by the threshing department.

In addition, since the cutting section can be raised from the lowered position, which is the working posture, to the regulated position, for example, the combine is moved backward by raising the cutting section to the regulated position while performing forced scraping when cutting a corner. This allows the harvester to move backwards without hindrance without dragging to the ground.

It is a side view of a combine. It is a side view of a cutting part. It is a perspective view which shows the culm takeover part between a cutting part and a threshing part. It is a top view which shows the transport system of a cutting part. It is a power transmission diagram of a combine. It is a perspective view of a control part. It is a block diagram of a control device. It is a flowchart of shift control. It is a flowchart of ascending / descending control. It is a continuation flowchart of the ascending / descending control. It is a flowchart which shows the other example of the elevating control. It is a graph which shows the relationship between the traveling speed and the driving speed of a cutting part. It is explanatory drawing of corner cutting.

Embodiments of the present invention will be described with reference to the drawings. As shown in FIG. 1, the combine harvester 1 that threshes rice and wheat while cutting is composed of a self-removing combine harvester that cuts five rows of passengers, and is provided with a traveling device under the rectangular body frame 2. Further, this traveling device is a crawler type in which a crawler 4 is wound around the left and right traveling frames 3 and driven by a transmission 5. Further, a control unit A provided with a driver's seat 6 is provided on the front right side of the body frame 2 in the forward direction of the body, and a hydraulic cylinder (not shown) is used to extend the cutting section B from the front left side of the body frame 2 to the front of the control unit A. Provided so that it can be raised and lowered.

Further, a threshing section C is provided on the machine frame 2 on the left side behind the cutting section B, and on the right side of the threshing section C, a grain collecting section D composed of a grain tank 7 and grains stored in the grain collecting section D are provided. A discharge auger 8 for discharging grains to the outside of the machine is provided. Then, a straw waste processing device E composed of a cutter 9 is provided behind the threshing section C and the grain collecting section D. Further, a driving part is provided between the control part A and the grain collecting part D, and the engine 10 housed in the driving part drives each part of the combine 1.

Next, the above-mentioned cutting portion B will be described in more detail. As shown in FIGS. A transmission frame 12 is provided, which is supported by a hydraulic cylinder (not shown) and whose front side moves up and down in the vertical direction. Further, a cutting frame 13 is attached to the front side of the transmission frame 12, and a raising cover 14, a top cover 15, a side cover 16 and the like are detachably attached to the transmission frame 12 and the cutting frame 13.

Further, the transmission frame 12 includes an input transmission unit 17, a vertical transmission unit 18, a tip / stock origin transmission unit 19, a right stock transmission unit 20, a handling depth transmission unit 21, a lower transmission unit 22, and a left stock transmission unit 23. , And the raising transmission unit 24 are integrally connected to each other. Then, the power of the engine 10 is transmitted to the input transmission unit 17 by the cutting belt via the transport HST (hydrostatic continuously variable transmission) described later, and the tip of the engine 10 is transmitted from the input transmission unit 17 via the vertical transmission unit 18. Each device of the cutting unit B transmits from the lower transmission unit 22, the right stock transmission unit 20, the right stock transmission unit 20, the handling depth transmission unit 21, and the lower transmission unit 22 to the left stock transmission unit 23 and the raising transmission unit 24, respectively. To drive.

Further, the rear portions of the cutting frame 13 are attached to both ends of the lower transmission portion 22, and large and small weed bodies (dividers) 25 are provided at the tips of the six weeding pipes of the cutting frame 13. Further, the narrow guides 26 are extended rearward to the cursive scripts 25 at the left and right ends. Then, between the left and right Oita cursive scripts 25, two raising devices 30 in which a chain 29 with a claw 28 is wound in a raising case 27 are assembled in pairs so as to face each other, and the central Oita cursive script is also assembled. A single pulling device 30 is erected between the 25 so that the claw 28 faces the right side, and each pulling device 30 is driven from the raising transmission unit 24 provided at the upper part.

Further, a reciprocating cutting blade 31 is laid horizontally on the rear side of the cutting frame 13 so as to be movable left and right, and the rotational motion of the transmission shaft 32 provided on the left and right end sides of the lower transmission portion 22 is changed to a reciprocating motion by the crank arm. Further, the upper and lower cutting blades 31 are slidably driven in opposite directions by the rod and the bell crank. Further, the left and right star wheels 33a and 33e are rotatably fitted onto the shafts on which the bosses of the left and right bell cranks are fitted respectively.

Then, a holder 34, a sprocket 35, a pulley 36, etc. are provided above the star wheels 33a and 33e, and the left and right stock transfer chains 37 and 38 driven from the left stock transmission unit 23 and the right stock transmission unit 20 are provided with the above. Each sprocket 35 is meshed with each other, and the respective star wheels 33a and 33e and the respective protrusiond belts 39 wound around the pulley 36 are rotationally driven. The left and right star wheels 33b and 33d on the center side are constantly meshed with the star wheels 33a and 33e on the left and right end sides, and the left and right star wheels 33b and 33d on the center side and the belt 39 with protrusions are driven to rotate accordingly. Drive.

The most central star wheel 33c always meshes with the left star wheel 33b on the center side, and accordingly, the central star wheel 33c, the protruding belt 39, and the central stock transfer chain 40 are driven to rotate. do. Further, above the left and center stock transfer chains 37 and 40, a middle suction transfer chain 42 having a claw attached like the left suction transfer chain 41 having a claw is provided, and these left suction transfer chains 41 are provided. The middle scraping transfer chain 42 is rotationally driven directly from the left stock transmission unit 23 or via the central star wheel 33c.

A guide for guiding or holding the culm on the protruding belt 39, the star wheels 33a to 33e, the stock transfer chains 37, 38, 40, and the sprocket transfer chains 41, 42 with claws described above. And a guide plate are attached, and a pulley for winding a belt or a chain, a roller, a drive / driven sprocket, or a support frame for these is provided, and a scraping and transporting device for a culm is formed by these.

Further, following the scraping transport device, the cutting section B is provided with a lifting transport device composed of a handling depth transport body, an auxiliary transport body, and a tip transport body provided on the upper side of these. That is, the handling depth transfer body includes a handling depth transfer chain 43 driven from the handling depth transmission unit 21 and a holding guide 44, of which the handling depth transfer chain 43 is provided in the handling depth transmission unit 21. The drive sprocket 45 and the driven roller 47 pivotally supported by the support frame 46 are wound around and rotationally driven, and the holding guide 44 is attached to the support frame 46 via a pipe 48 formed in a substantially U shape with a rod or a spring. The pinching guide 44 is urged toward the handling depth transfer chain 43.

Further, the support frame 46 is attached to the rotating case 50 of the handling depth transmission portion 21 on the front side thereof, and the rear side is suspended and supported by a rod on an arm rotated by the handling depth electric motor 51. As a result, the handling depth transfer chain 43 and the holding guide 44 are configured so that the handling depth can be adjusted by swinging the rear side in the vertical direction with the front side as a fulcrum. The main sensor 52 and the two tip sensors 53 used for automatic adjustment of the handling depth are attached to the pipe frame 54 of the auxiliary carrier described below and the sensor pipe 55 to which the lower end is attached to the rear end of the pipe frame 54. Provide each.

Further, the auxiliary transport body includes an auxiliary transport chain 56 driven from the tip / stock transmission unit 19, a holding guide 57, a guide plate 58, and a threshing feed chain guide 59, of which the auxiliary transport chain 56 is a tip / stock. The lower drive sprocket 60 provided in the original transmission section 19 and two driven rollers 61 pivotally supported by the support frame are wound around and rotationally driven, and the holding guide 57 is raised to the holder of the transmission section 24 and the front end of the pipe frame 54. A portion is attached, and the holder 62 provided at the rear portion of the pipe frame 54 is attached via a rod or a spring, whereby the holding guide 57 is urged toward the auxiliary transport chain 56.

Further, a threshing feed chain guide 59 composed of a guide plate 58 made of a leaf spring and a rod is attached to a holder 62 provided at the rear of the pipe frame 54. The other end of the sensor pipe 55 is fixed in the middle of the frame that connects the vertical transmission portion 18 and the upper portion of the transmission portion 24.

The tip transporting body includes a tip transport chain 64 to which a claw 63 driven from the tip / stock transmission unit 19 is attached, a guide plate 65, and a guide sprocket 66. Among them, the tip transport chain 64 is a tip / stock source. The upper drive sprocket 67 provided in the transmission unit 19 and the two driven sprockets 68 pivotally supported by the transport case are wound around and rotationally driven. The guide plate 65 is provided on the upper side of the transport case, and the guide rod 66 is further provided. Is provided so that the front end portion is attached to a guide plate provided above the left sprocket transfer chain 41 and faces the top and bottom of the guide plate so as to sandwich the claw 63 of the tip transfer chain 64.

Next, the threshing section C will be captured and explained. As shown in FIGS. 1, 3, and 5, the threshing section C is provided on the machine frame 2 on the left side behind the cutting section B, and is provided on the front and rear walls and the left and right sides. A threshing fed chain 70 is formed in the upper part of a machine frame composed of a side wall, a bottom plate, a cylinder cover 69, etc. , And a holding rail 71 provided on the cylinder cover 69, a first handling cylinder 72 having a large number of handling teeth to be planted around the cylinder cover 69, and a semicircular receiving net provided below the first handling cylinder 72. In addition, a processing chamber for processing straw waste mixed with grains that could not be threshed in the handling chamber is provided in parallel from the rear end tip side of the first handling cylinder 72 toward the rear of the machine body, and this processing chamber is provided. Is provided with a second handling cylinder 73 and a receiving net.

Further, below the first and second handling cylinders 72 and 73, a sorting chamber including a swing sorting body 74 for sorting and processing grains leaked from the receiving net and a sorting air passage is provided. Here, the oscillating sorting body 74 is provided in an inclined shape that becomes higher toward the rear end side, and in order from the front end side, a non-perforated glen pan, a chaff sheave composed of a large number of fins, and a large number of sawtooth-shaped racks. The straw racks are arranged side by side, and an integral frame body provided with a crimp net below the chaff sheave, and the swing mechanism 75 swings the entire swing sorter 74 in the front-rear direction.

On the other hand, the sorting air passage has a wind blowing action by a wall insert fan 76 provided below the front end side of the swing sorting body 74 and a turbo fan 77 provided below the center portion, and suction by a suction fan 78 provided at the rear end side of the sorting chamber. It was composed of the first selection air passage and the second selection air passage formed by the action, and leaked from the receiving net by two methods of wind selection and rocking in combination with the rocking motion of the rocking sorting body 74. The processed material is sorted into paddy and straw waste. The dust such as straw dust and dust sucked by the suction fan 78 is discharged from the dust outlet to the rear of the threshing section C.

Further, below the crimp net of the oscillating sorting body 74, the first spiral 79 for collecting the first one selected by the oscillating sorting action and the wind sorting action of the sorting wind and the second spiral for collecting the second one are collected. The first gutter and the second gutter equipped with 80 are provided. Then, the first thing (grain) to be laterally fed by the first spiral 79 is transferred to the grain tank 7 constituting the grain collecting portion D by the fried grain spiral 81 built in the fried grain cylinder, and is laterally fed by the second spiral 80. The second product to be sent (unsorted grains, straw waste, etc.) is reduced again onto the chaff sheave by the second reduction spiral 82 built in the reduction cylinder. The grain tank 7 temporarily stores the grains, and then discharges the grains to the outside of the machine by the horizontal spiral 83 and the vertical spiral 84 of the discharge auger 8.

Further, above the rear end side of the swing sorter 74, a straw discharge transport device for transporting the culm to be discharged from the handling chamber after the threshing process is provided toward the straw discharge treatment device E provided at the rear is provided. In this straw culm transport device, the start end is directed toward the end of the threshing feed chain 70, and the transport end side is obliquely installed toward the inside of the machine body. Further, the tip side is configured to be conveyed by the claw-attached chain 86. Further, the straw discharge processing device E is composed of a disc type cutter (straw cutter) 9, and the disc type cutter 9 shreds the culm to be transported from the threshing portion C by the straw discharge transport device and diffuses the spiral 87. It is released as cut straw to the site where it was cut.

Then, each device such as the cutting section B and the threshing section C configured as described above is driven by the engine 10 housed in the driving section as shown in FIG. That is, each device of the threshing section C and the straw waste processing device E excluding the threshing feed chain 70 is driven from the engine 10 via the threshing clutch 88 composed of the belt tension clutch. Further, the threshing feed chain 70 is driven from the threshing clutch 88 via the transfer HST (hydrostatic continuously variable transmission) 89, and further, from the transfer HST 89 via the cutting clutch 90 composed of the belt tension clutch, the cutting section B Drive each device.

Further, the engine 10 drives a crawler type traveling device, and the power transmitted from the engine 10 via the traveling belt 91 is changed by the traveling HST (hydrostatic continuously variable transmission) 92. The transmission 5 is a steering device (deceleration) composed of a sub-transmission device 93 that shifts between standard, running, and neutral speeds by a gear transmission device, a hydraulic clutch & brake 94, left and right hydraulic clutches 95, side clutches 96, and the like. A turn, a brake turn, and a spin turn) are provided, and the left and right crawler 4s are driven by their respective drive sprockets 97. When the grains are discharged from the grain tank 7, the discharge clutch 98 composed of the belt tension clutch that drives the lateral spiral 83 from the engine 10 is engaged.

Further, the control unit A is provided with an operating tool for operating each device such as the traveling device, the cutting section B, and the threshing section C while the operator is sitting or standing in the driver's seat 6. That is, as shown in FIG. 6, a front panel 100 equipped with a tachometer assembly 99 or the like is provided on an operation column erected from the floor in front of the driver's seat 6, and a multi for steering the aircraft and raising and lowering the cutting section B. A steering lever 101 is provided. Further, the side panel 102 provided on the left side of the driver's seat 6 is provided with a main shift lever 103 for operating the traveling HST 92, an auxiliary shift lever 104 for operating the auxiliary transmission 93, and an engine control lever 105.

Further, the grip of the multi-steering lever 101 is composed of a quick-up trigger switch 106 composed of a momentary switch, and the grip of the main shift lever 103 is composed of a forced suction switch 107 composed of a momentary switch and an alternate switch. A lodging switch 108 is provided. Further, a combination switch 109, a horizontal operation lever 110, and a lift shut switch 111 with a cutting height dial and a lamp are provided near the left end of the front panel 100.

The side panel 102 behind the main shift lever 103 has a power clutch switch 112 that turns on and off the threshing clutch 88 and the cutting clutch 90, which are composed of belt tension clutches, via a power clutch motor, automatic handling depth control, and automatic direction. A sorting dial equipped with an automatic switch for turning on / off control and horizontal automatic control and a sorting automatic switch will be provided.

The configuration of each part of the combine has been described above, but next, the control device related to the driving of the cutting part B of the present invention will be described. As shown in the block diagram of FIG. 7, the control device includes two electronic control units (ECUs) 113 and 114 composed of a microcomputer, and the units 113 and 114 are connected to each other by a control area network (CAN) so as to be able to communicate with each other.

Then, on the input side of one of the units 113, a power clutch switch 112 for turning on / off the grain removal clutch 88 and the cutting clutch 90, a transmission rotation sensor 115 for detecting the rotation speed of the transmission shaft provided in the transmission 5, and a transport HST 89. Connect the transport rotation sensor 116 that detects the output rotation speed, the lodging switch 108, the forced scraping switch 107, the main shift lever 103, the main shift potentiometer 117 that detects the tilt angle of the sloping plate of the transport HST89, the transport potentiometer 118, etc. do.

Further, on the input side of the other unit 114, a pickup sensor 119 that detects the rotation of the engine 10, a lift potentiometer 120 that detects the lifting amount (cutting height) of the cutting portion B, and a front-rear direction (lifting / lowering) of the multi-steering lever 101. Connect the multi-elevation potentiometer 121 that detects the tilt angle (direction), the cutting height setting potentiometer 122 that sets the cutting height position with the cutting height dial, the lift shut switch 111, the quick-up trigger switch 106, and the like.

Further, to the output side of the unit 113, an electric transfer motor 123 that operates the tranion shaft of the transfer HST89 is connected via a transfer motor relay 124 that performs forward / reverse rotation and speed switching during forward / reverse rotation. At the same time, the solenoid 125 of the unload valve and the lodging lamp 126 provided in the hydraulic lifting circuit of the cutting section B are connected.

Then, on the output side of the unit 114, an electronic buzzer 127, a lift shut lamp 128 for displaying the on / off state of the lift shut switch 111, a solenoid 129 for a lift ascending valve for raising and lowering the cutting portion B, a solenoid 130 for a lift lowering valve, and the like. And the solenoid 131 of the lift flow rate control valve is connected.

Further, the control device configured as described above performs various controls of the cutting unit B, and among them, the speed change control of the cutting unit B shifts the driving speed of the cutting unit B based on the traveling speed (vehicle speed) of the aircraft and the like. The power transmitted from the engine 10 via the grain removal clutch 88 is shifted by the transfer motor 123 by operating the trunnion shaft of the transfer HST89, and further, the power is transmitted via the cutting clutch 90 provided on the downstream side of the transfer HST89. Drive the cutting section B. Since the power shifted by the transport HST 89 is branched and transmitted to the threshing feed chain 70 on the upstream side of the cutting clutch 90, this shift control controls the driving speed of the cutting unit B and the threshing feed chain 70. Become.

Hereinafter, the details of the shift control of the cutting section B will be described with reference to the flowchart of FIG. 8. The shift control of the cutting section B starts from step S1 in which the state of the threshing clutch 88 and the cutting clutch 90 is determined by the power clutch switch 112. If both the threshing clutch 88 and the cutting clutch 90 are disengaged, the process returns as it is. If only the threshing clutch 88 is engaged, the target speed of the cutting unit B is set to the hand handling speed (step S2).

If the cutting clutch 90 is engaged together with the threshing clutch 88, the lift shut switch 111 is determined based on the determination of turning on / off the lift shut switch 111 (step S3) and the determination of turning on / off the forced suction switch 107 (step S4). If the forced suction switch 107 is not pressed and is turned off, the current cutting height (elevation position) of the cutting section B detected by the lift potentiometer 120 is compared with the preset lift shut position. (Step S5), if the cutting height is equal to or higher than the lift shut position, the target speed of the cutting unit B is set to zero (stop) (step S6).

Further, if the lift shut switch 111 is turned off, the forced suction switch 107 is pressed, or the cutting height is lower than the lift shut position, the main shift potentiometer 117 determines whether the aircraft is in the forward state. (Step S7), when the aircraft is moving forward, the target speed of the cutting unit B is set to a speed synchronized with the standard running speed shown in FIG. 12 (step S8). Next, the on / off state of the lodging switch 108 is determined (step S9), and if the lodging switch 108 is turned on, the target speed of the cutting section B is synchronized with the traveling speed of the lodging shown in FIG. 12 (step S9). Set to 1.5 times the standard speed) (step S10).

Further, it is determined whether the forced suction switch 107 is pressed and turned on (step S11), and if the forced suction switch 107 is turned on, the target speed set by the steps up to now and the forced setting set in advance are performed. Compare the scraping speed (select from two types, standard and lodging depending on whether the lodging switch 108 is turned on or off) (step S12), and if the target speed is slower than the forced scraping speed, set the target speed of the cutting section B to the forced scraping speed. (Step S13).

If the aircraft is stopped or is moving backward in step S7 described above, it is determined whether the forced suction switch 107 is pressed and turned on (step S14), and the forced suction switch 107 is turned on. If so, the target speed of the cutting unit B is set to the forced scraping speed (step S13). Further, when the forced suction switch 107 is turned off, the target speed of the cutting unit B is set to zero (stop) (step S6).

Then, the target speed of the cutting unit B set by the above steps is compared with the transport speed (driving speed) of the current cutting unit B (or the threshing feed chain 70) obtained from the transport rotation sensor 116 (step S15). If the transport speed does not reach the target speed, the transport motor 123 is rotated in the normal direction to increase the speed of the transport HST89 (step S16). On the contrary, when the transfer speed exceeds the target speed, the transfer motor 123 is reversed to decelerate the transfer HST89 (step S17), and when the transfer speed matches the target speed, the transfer motor 123 is stopped to target the transfer HST89. Maintain at speed (step S18).

On the other hand, the elevating control of the cutting unit B executed by the control device will be described. The elevating control of the cutting unit B is such that the cutting unit B is moved up and down to a lowering position that is a cutting work posture and an ascending position that is a non-working posture. Yes, the hydraulic cylinder is expanded and contracted to control the cutting height of the cutting portion B, mainly based on the tilting operation of the multi-steering lever 101 in the front-rear direction. That is, as shown in the flowcharts of FIGS. 9 and 10, the raising / lowering control of the cutting unit B is the on / off state of the cutting height control indicated by the cutting height setting potentiometer 122 operated by the cutting height dial attached to the lift shut switch 111. It starts from step S1 for determining.

Then, when the cutting height dial is rotated to the maximum counterclockwise to the turning position of the cutting height control, the cutting portion B is mechanically tilted based on the tilting operation of the multi-steering lever (multi-lever) 101 in the front-rear direction. At the maximum lowering position, which is supported by the lower limit stopper (not shown) and cannot be lowered further, and the maximum rising position where the hydraulic cylinder (not shown) is extended to the maximum and cannot be extended any further. The cutting unit B can be raised and lowered at any position over the area.

Further, even if the cutting height control is turned on, in the state where the power clutch switch 112 has both the grain removal clutch 88 and the cutting clutch 90 turned off (step S2), the same control as described above is performed, and here, the multi-steering lever is performed. The tilting operation of the (multi-lever) 101 is determined by the multi-elevation potentiometer 121 (step S3), and when the ascending operation of the multi-lever 101 is detected, the solenoid 129 of the lift ascending valve is energized to extend the hydraulic cylinder and mow. Part B is raised so as to be in a non-working posture (step S4). When the lowering operation of the multi-lever 101 is detected, the solenoid 130 of the lift lowering valve is energized to reduce the hydraulic cylinder by the weight of the cutting section B, and the cutting section B is lowered so as to be in the working posture (step). S5).

Further, when the multi-lever 101 is returned to the neutral position, the energization of both solenoids 129 and 130 is cut off, the hydraulic cylinder stops expansion and contraction to support the cutting portion B, and holds (stops) the cutting portion B at that height. (Step S6). On the other hand, when the multi-steering lever 101 is tilted with the threshing clutch 88 engaged or the threshing clutch 88 and the cutting clutch 90 engaged with the cutting height control turned on (step S7), it is an ascending operation. If so, it is determined whether or not the quick-up trigger switch (trigger switch) 106 is operated at the same time (step S8).

Then, if the trigger switch 106 is operated at the same time and is turned on, the lift shut flag is set (step S9). Further, the operating state of the forced suction switch 107 is determined (step S10), and if the forced suction switch 107 is turned on, the state of the lift shut flag is determined (step S11). Then, when the lift shut flag is set, the lift shut position is compared with the regulated position at the time of forced scraping (step S12), and if the lift shut position is higher, the lift shut flag is reset (step S13).

Further, the current cutting height (elevation position) of the cutting portion B detected by the lift potentiometer 120 is compared with the regulated position (step S14), and if the cutting height is lower than the regulated position, the solenoid 129 of the lift rise valve is energized for cutting. Part B is raised (step S15). However, when the cutting section B rises and the cutting height reaches the regulated position, the energization of the solenoid 129 is cut off to stop the cutting section B, and the cutting section B is regulated so as not to rise further (step S16).

On the other hand, if the forced suction switch 107 is turned off in step S10, or if the lift shut position is the same as or lower than the regulated position in step S12, the state of the lift shut flag is determined (step S17). Then, if the lift shut flag is set here, the cutting height is compared with the lift shut position (step S18), and if the cutting height is lower than the lift shut position, the solenoid 129 of the lift rise valve is energized and the cutting section is used. B is raised (step S19).

Then, when the cutting height reaches the lift shut position by repeating the above loop, the rising of the cutting portion B is stopped and the lift shut flag is reset (step S20). If the lift shut flag is reset in step S17, the cutting section B is raised (step S15). Further, when the multi-steering lever 101 returns to the neutral position in step S7, the raising and lowering of the cutting portion B is stopped (step S21). Then, when the multi-steering lever 101 is lowered in step S7, the state of the trigger switch 106 is determined (step S22).

Here, if the trigger switch 106 is not operated and is off, the cutting height is compared with the cutting height dial value (dial value) detected by the cutting height setting potentiometer 122 (step S23), and the cutting height is compared. If the cutting height is higher than the dial value, the solenoid 130 of the lift lowering valve is energized to lower the cutting portion B (step S24). Then, as a result of continuing the lowering operation of the multi-steering lever 101 as described above, when the cutting height reaches the cutting height dial value, the lowering of the cutting portion B is stopped (step S21), and the cutting portion B is lowered. Make a working posture.

On the other hand, when the trigger switch 106 is operated at the same time and is turned on, in the comparison between the cutting height and the cutting height dial value (step S25), if the cutting height is higher than the cutting height dial value, the cutting height is the cutting height. The cutting unit B is lowered until the dial value is reached (steps S26 and S27), and when the cutting height reaches the cutting height dial value, the lowering of the cutting unit B is stopped (step S28). Further, if the cutting height matches or is lower than the cutting height dial value, the cutting portion B can be lowered (step S29), and the cutting portion B can be lowered below the cutting height dial value.

The details of the shift control and the elevating control of the harvesting unit B have been described above based on the flowchart. However, when these controls are explained in light of the actual harvesting work, when the harvesting work is performed in the field, first the field is used. Mow the four corners to secure a headland that will serve as a circulation space for combine 1. However, assuming that the headland has already been secured by cutting the corners, the combine 1 is generally cut by cutting the rows (two-way cutting) or cutting the rows and cutting repeatedly. Do the work.

Then, at that time, the operator operates the power clutch switch 112 to engage the cutting clutch 72 together with the threshing clutch 70, and the cutting portion B is set by the multi-steering lever 101 with the cutting height dial. Lower to. Next, the main speed change lever 103 is moved forward to start the work run. Further, during row cutting or horizontal cutting, the traveling direction of the combine 1 is appropriately corrected according to the row of the culm to be cut by the steering operation by tilting the multi-steering lever 101 to the left or right.

Further, when the cutting of one stroke is completed, the operator advances the combine 1 as it is for a while, and then, for example, at the timing when the combine 1 comes out from the end of the row, the multi-steering lever 101 is operated to raise the cutting portion B. Then, in the case of row cutting, the headland is run toward the next row as it is, and the cutting portion B is further lowered to cut the next row. Further, in the case of performing round cutting, after raising the cutting section B, the direction is changed to the next row while moving backward once, and the cutting section B is lowered again as the cutting section moves forward to cut the next row.

In addition, when the harvesting section B is immediately raised and the direction is changed to the next row after cutting the grain culm of one stroke, the combine 1 makes a credible turn or a gentle turn and steps on the adjacent uncut grain culm. This may make subsequent harvesting impossible. Therefore, the forward running at the end of cutting avoids this, and during this time, most of the culms cut immediately before the end of cutting are conveyed to the threshing section C. Therefore, since no culm remains in the cutting section B, even if the cutting section B is raised to the non-working posture, no culm spillage occurs from the grain culm taking over section between the cutting section B and the threshing section C.

Then, in such a cutting operation, when the cutting clutch 90 is engaged with the threshing clutch 88 and the vehicle travels forward, the cutting unit B, the threshing unit C, and the straw waste processing device E are driven. Further, the driving speed (conveying speed) of the cutting section B and the threshing feed chain 70 is changed in synchronization with the traveling speed, and the layer thickness of the transporting grain in the cutting section B and the threshing feed chain 70 is increased or decreased regardless of the increase or decrease in the traveling speed. It becomes constant and the load on the threshing portion C is reduced. On the other hand, when the combine 1 is stopped or moved backward after cutting, the cutting unit B and the threshing feed chain 70 stop their driving, and the vibration and noise generated from them are eliminated.

The operator increases or decreases the traveling speed depending on the cutting material conditions and the like, and the control device normally sets the driving speed of the cutting unit B and the threshing feed chain 70 as the traveling speed (as shown in FIG. 12). It is driven at a standard driving speed that is proportional to the vehicle speed. However, when the grain culm is lying down and the operator turns on the lodging cutting switch 108, the cutting section B and the threshing feed chain 70 are driven at a driving speed 1.5 times the standard driving speed, which is higher than the standard. Properly raise and mow the fallen culm at a high raising speed.

Further, the driving speed of the cutting section B and the threshing feed chain 70 is provided with an upper limit and a lower limit that are not proportional to the traveling speed, and the upper limit is the handling cylinder 72 when the transport speed of the threshing feed chain 70 is too fast. , 73, since there is a possibility that unhandled parts may occur, the driving speed of the threshing feed chain 70 is limited in order to prevent this. Further, the lower limit is set so that the driving speeds of the cutting unit B and the threshing feed chain 70 are not extremely low because the control of the transport HST89 in the low rotation range is not stable, and the transport speed and the like are stabilized.

On the other hand, for convenience of explanation, the corner cutting of the four corners of the field, which was turned later, will be described. The corner cutting is performed by putting the combine 1 in the field and, for example, performing the corner cutting in the four corners of the field after one stroke of the ridge is completed. That is, in order to change the direction of the combine 1 in order to mow the next process at the four corners of the field, a traveling space for the combine 1 is required. Therefore, as shown in FIG. 13, the combine 1 is repeatedly moved forward and backward, and the grain culms that interfere with the rotation are gradually cut to create a circulation space.

Then, in the case of performing this corner cutting, in order to reduce the uncut portion as much as possible and eliminate the hand cutting work, the cutting is performed until the tip of the weed body 25 and the ridge are barely hit or not hit during the forward cutting of the combine 1. Further, in that case, the forward speed is set to be lower than the speed at the time of normal cutting, and the combine 1 can be stopped immediately, so that the cursive script 25 is not thrust into the ridge and damage is prevented.

However, if the traveling speed is low, the driving speed of the cutting section B also becomes low, and the culm raising performance and cutting performance are deteriorated, and the culm posture is liable to be disturbed. Further, since new grain culms are not supplied to the scraping portion at the end of cutting, the scraping becomes insufficient and culms are likely to spill. Therefore, the operator pushes the forced scraping switch 107 before and after the end of cutting. Then, if the driving speed of the cutting section B is low, the control device increases the speed so that the forced scraping speed is reached (see step S13 in FIG. 8), whereby the scraping performance of the cutting section B is improved and corner cutting is performed. It is possible to prevent culm spillage at the scraping portion of the cutting portion B in the above.

Further, when the tip of the weed body 25 reaches the ridge and the traveling of the combine 1 is stopped, the control device usually stops the driving of the cutting section B and the threshing feed chain 70. However, if the forced scraping switch 107 is pressed, the cutting section B and the threshing feed chain 70 are driven as they are at the forced scraping speed. Therefore, the grain culms that have already been cut and squeezed are taken over by the threshing feed chain 70 from the squeeze transfer device via the lift transfer device and are threshed.

Further, when it is confirmed that the last culm has been taken over from the cutting section B to the threshing feed chain 70 and the pushing operation of the forced scraping switch 107 is released, the driving of the cutting section B and the threshing feed chain 70 is stopped. .. However, in such corner cutting, the operator rushes the cutting work, and after stopping the combine 1, immediately raises the cutting section B to a non-working posture to perform a reverse operation, and at that time, forcibly scratches. It is also conceivable to press the combine switch 107.

However, when the cutting section B is generally raised to the ascending position (H3) in which the cutting section B is in a non-working posture, the auxiliary transport body (auxiliary transport chain 56, guide plate 58, threshing feed chain guide 59, etc.) of the cutting section B is also cut. The input transmission portion 17, which is the rotation fulcrum of the portion B, rotates around the center (P), and the auxiliary transport body near the transport end is lifted upward. Then, a gap is generated between the threshing feed chain 70 and the joint surface near the start end, and the culm easily falls out of the machine through this gap.

Further, when the final culm that has been cut by driving the cutting portion B in this state reaches the takeover portion near the end of the auxiliary carrier and near the start of the threshing feed chain 70, the culm layer is sparse and extremely thin. Therefore, the holding force of the guide plate 58 and the threshing feed chain guide 59 facing the joint surface of the holding guide 57 of the auxiliary transport chain 56 and the threshing feed chain 70, or the holding force due to pressing is reduced, and the culm spills. May occur.

Therefore, in the control device of the present invention, in the working posture in which the cutting unit B is lowered in this way, a forced suction command is issued by the pushing operation of the forced suction switch 107, and cutting is performed regardless of whether the vehicle is stopped or moved backward. When driving the part B, the ascending position of the cutting part B to the non-working posture is restricted, and the head loss due to the above-mentioned culm spill at the grain taking over part between the cutting part B and the threshing part C. Control to eliminate.

That is, when the cutting unit B is in the lowered working posture (H1) and the cutting unit B is raised by the multi-steering lever 101 or the like, the control device sets the current cutting height at a preset regulation position (H1). If it is lower than H2), the cutting section B is raised, and if the cutting height matches the regulated position, the raising of the cutting section B is stopped to prevent the cutting section B from rising beyond the regulated position (FIG. 9). See step S14).

The restricted position (H2) is set as high as possible so that there is no risk of culm spilling even if the cutting portion B is raised, and the cutting portion B is separated from the ground even if the combine 1 is moved backward, for example. It is preferable to set it at a high position where it does not drag mud. Further, when the combine 1 is stopped or moved backward, if it is necessary to raise the cutting portion B to a position higher than the regulation position for some reason, the forced suction switch 107 can be stopped by stopping the cutting portion B. The ascending restriction is immediately released, and the cutting portion B can be raised to a position higher than the restricted position by the ascending operation of the cutting portion B by the multi-steering lever 101.

Further, when the cutting unit B is in the lowered working posture, the control device simultaneously raises the multi-steering lever 101 and pulls the quick-up trigger switch 106 to bring the cutting unit B to a preset lift shut position. It is raised (see step S19 in FIG. 9), thereby stopping the driving of the cutting section B and the threshing feed chain 70 (steps S5 and S6 in FIG. 8).

Then, the raising of the cutting section B and the drive stop of the cutting section B and the threshing feed chain 70 using the quick-up trigger switch 106 are executed even if the multi-steering lever 101 is immediately returned to the neutral position once the command is given. The cutting unit B can be quickly put into a non-cutting posture and a non-cutting state. Further, by simultaneously operating the lowering operation of the multi-steering lever 101 and the pulling operation of the quick-up trigger switch 106, the cutting posture of the cutting unit B and the transition to the cutting state can be quickly performed (step S22 in FIG. 9). , See step S27 in FIG. 10).

In addition, the control device uses the quick-up trigger switch 106 and the multi-steering lever 101 to control the ascent of the cutting unit B to the lift shut position, and the forced suction switch 107 and the multi-steering lever 101 to control the raising of the cutting unit B. In the priority relationship in the ascending control of B to the regulated position, if the lift shut position is higher than the regulated position, the cutting section B is raised to the regulated position, and conversely, if the regulated position is higher than the lift shut position, the cutting section B is lifted to the lift shut position. (See step S12 in FIG. 9).

Therefore, in this case, since the cutting section B does not rise beyond the regulated position in any case, it is possible to prevent culm spillage at the culm transfer section between the cutting section B and the threshing section C. The lift shut position or the regulation position (H2) is a preset position, but in these positions, the cutting unit B is positioned at the desired height, and a control device is separately provided as needed. It can be re-memorized in the prepared adjustment mode. Therefore, the heights of the lift shut position and the regulated position fluctuate depending on the adjustment, and it becomes necessary to perform the height comparison described above.

Next, to explain another example of the elevating control executed by the control device, this elevating control automatically raises the cutting unit B to the backup position which is the non-working posture set in advance by the reverse operation of the combine 1. In addition to the various switches shown in the block diagram of FIG. 7, the control device is provided with a backup switch (not shown: provided in the control unit A like other switches) on the input side. Connecting.

Then, as shown in the flowchart of FIG. 11, the additional control is operated by turning on the backup switch in the neutral state of the multi-steering lever 101 (step S7) (step S30), and is combined by the main shift potentiometer 117. When it is detected that the reverse operation of 1 has been performed (step S31), the operation state of the forced scraping switch 107 is determined (step S32).

Here, when the forced scraping switch 107 is turned on, the backup position is compared with the regulated position at the time of forced scraping (step S33), and if the backup position is higher, the target ascending position is set to the regulated position. Set (step S34). Further, if the forced suction switch 107 is off, or if the backup position and the regulation position are the same or the regulation position is higher, the ascending position is set to the backup position (step S35).

Further, the current cutting height is compared with the target ascending position (step S36), and if the cutting height is lower than the ascending position, the solenoid 129 of the lift ascending valve is energized to raise the cutting portion B (step S37). Then, when the above loop is repeated and the cutting height reaches the target ascending position, the ascending of the cutting portion B is stopped (step S21).

Therefore, in the ascending control of the cutting section B during the reverse operation configured as described above, the cutting section B is lowered by the multi-steering lever 101 to complete one step of row cutting or horizontal cutting, and then the next row. When the combine 1 is to be moved backward by the main speed change lever 103, the cutting section B is automatically raised to the backup position. Therefore, the operator can omit the ascending operation of the cutting unit B when moving backward, or even if the ascending operation is forgotten, the cutting unit B is automatically raised, and even if the combine 1 is moved backward as it is, the cutting unit B is used. However, it does not move away from the ground and drag mud, which does not hinder reverse driving.

Further, in the above-mentioned corner mowing, when the operator rushes the mowing work and immediately performs the reverse operation after stopping the combine 1, if the forced scraping switch 107 is pressed, the backup position and the regulation position are set. Since the cutting section B automatically rises to any lower position, it is possible to prevent culm spillage at the culm transfer section between the cutting section B and the threshing section C in this case as well.

In addition, even if the cursive script 25 that is close to the ridge is automatically raised by the reverse operation, it does not rise beyond the regulation, so the cursive script 25 rises significantly (H3) and hits the high ridge or concrete wall in front. It can be prevented from being damaged. Since the elevating control of the second embodiment adds only the elevating control of steps S30 to S37 to the elevating control of the first embodiment (flow charts of FIGS. 9 and 10), the description in the other steps will be described. Is omitted.

The two embodiments of the present invention have been described above, but when the forced suction switch 107 is pushed in the working posture of the cutting section B to drive the cutting section B regardless of whether the vehicle is stopped or moved backward, the cutting section B is not working. The regulation to the ascending position to be the posture may not allow the ascending to the restricted position shown in the embodiment, and may keep the cutting portion B in the working posture as it is and make the ascending impossible at all.

Further, as in the automatic ascending control of the cutting unit B during the reverse operation shown in the second embodiment, the non-working posture of the cutting unit B is limited to the automatic ascending control in which the operator is not directly involved in the ascending operation. When the ascending regulation is activated and the operator directly uses the multi-steering lever 101 or the like to perform the ascending operation, the operator's operation can be prioritized so that the ascending regulation is not activated. The invention is not limited to the above embodiment.

1 Combine B Cutting part C Threshing part 70 Threshing feed chain 89 Transport HST
103 Main speed change lever 107 Forced suction switch 101 Multi-steering lever 112 Power clutch switch 113, 114 Control device

Claims (1)

In a combine equipped with a cutting section that transports the harvested grain rearward, a threshing section that takes over the grain grain transported from the harvesting section, a control section equipped with a driver's seat, and a control device that controls various cutting sections. The control unit is provided with a multi-steering lever for maneuvering the aircraft and raising and lowering the cutting unit, and a main shift lever for operating the traveling HST, and a forced suction switch is provided on the grip of the main shift lever. The control device performs ascending / descending control for controlling the cutting portion to a descending position in which the cutting portion is in a working posture and an ascending position in which the cutting portion is in a non-working posture, and shift control for driving the cutting portion in synchronization with the traveling speed. When the forced scraping command is issued by the pushing operation of the forced scraping switch in the working posture to drive the cutting section regardless of whether the vehicle is stopped or moved backward, it is allowed to rise to the regulated position set by the cutting section. In addition, the combine is characterized by restricting the ascent of the cutting section to the ascending position, which is a non-working posture , beyond this restricted position.

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