JP2011193775A - Combine harvester - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a combine harvester capable of reducing the damage rate of cereal grains on discharging the same.SOLUTION: When a discharging switch is turned on while an operation-switching dial is at a rice position (timing P), a microcomputer connects a discharging crutch and also starts the discharge of the cereal grains (timing P to R) by making the rotating speed of an engine as a rated rotating speed. On the other hand, in the case of discharging the cereal grains used as seeds, the operation-switching dial is set at a seed position (timing S), and when the discharging switch is turned on at that state, the microcomputer sets the rotation speed of the engine at a seed rotating speed which is lower than the rated rotation speed and drives a discharging auger by that engine rotation speed (timing U to W).

Description

  The present invention relates to a combine equipped with a discharge device for discharging grain stored in a Glen tank.

  In general, a combine harvester harvests cereal while running in a field, threshing the harvested cereal, and a threshing unit for threshing the cereal while the machine is stopped, and the threshing unit The sorting unit that sorts the harvested grain, so that it can perform three operations: a handling operation that performs only the threshing and sorting of the grain, and a discharge operation that discharges the harvested grain to the outside of the machine It has become.

  Conventionally, in such a combine, for the purpose of reducing fuel consumption, the engine rotation speed is set to the rotation speed at the time of discharge work when the work load is small compared to the harvesting and handling work described above. A device that is set lower than a certain rated rotational speed has been devised (see Patent Document 1).

JP 2009-72068 A

  On the other hand, in the above-mentioned Glen tank, grains of various varieties such as wheat, soybeans, buckwheat, etc. may be stored in addition to rice, and grains harvested for seeds other than normal grains Grains may be stored. And when the grain stored in the Glen tank is a grain that is easily damaged at the time of discharge, such as soybean, or a grain that is harvested for seeds, the combine of the above-mentioned Patent Document 1 Thus, if grains are discharged at a constant discharge rate at all times, even if there are no problems with other grains, they will be damaged during the discharge operation, resulting in a drop in product value or a decrease in germination rate. May become unusable as seeds.

  Therefore, the present invention provides a harvesting target setting means for setting the target to be harvested by the combine, and according to the setting of the harvesting target setting means, by changing the discharging speed when discharging the grain from the grain tank, It aims at providing the combine which solved the said subject.

The present invention includes a pretreatment unit (5) for harvesting cereals, a threshing unit (7) for threshing cereals harvested by the pretreatment unit (5), and cereals threshed by the threshing unit (7) Sorting unit (10) for sorting grains, Glen tank (12) for storing the grains sorted by sorting unit (10), and discharging device for discharging the grains stored in the grain tank (12) In a combine (1) comprising (13),
Harvest target setting means (60) switched according to the type of grain that the combine (1) harvests;
A controller (70, 71) for changing the discharge speed of the discharge device (13) according to the setting of the harvesting target setting means (60) when discharging the grain from the grain tank (12); It is characterized by having.

Further, according to the present invention, the discharge device has a transport spiral (36, 37, 39) that is driven in conjunction with rotation of the engine (45),
The control unit (70, 71) controls the engine rotation speed at the time of harvesting according to the setting of the harvest target setting means (60), and also controls the engine rotation speed at the time of grain discharge to control the discharge. The discharge speed of the device (13) is changed.

  Furthermore, this invention is characterized by the said control part (70,71) changing the fin opening degree of the said selection part (10) according to the setting of the said harvest object setting means (60).

  In addition, although the code | symbol in the said parenthesis is for contrast with drawing, this is for convenience for making an understanding of invention easy, and it has an influence on the structure of a claim. It is not a thing.

  According to the first aspect of the present invention, the operator sets the harvest target by switching the harvest target setting means according to the type of grain to be harvested, and the control unit sets the grain tank according to the setting of the harvest work setting means. The type of the grain stored in is determined, and the discharging speed is changed according to the type of the grain during the discharging operation. As a result, the discharge speed of the discharge device can be changed to a speed suitable for the type of grain, the damage rate of the grain at the time of discharge can be reduced, and the harvesting efficiency can be improved. The germination rate of grain can be improved.

  According to the invention which concerns on Claim 2, the rotational speed of an engine can be changed according to the kind of grain by controlling the engine rotational speed at the time of work according to the kind of grain to harvest. In particular, even in a discharge device that includes a transport spiral that is driven by transmission of rotation from the engine, and that may damage the grain due to the transport spiral when the discharge speed is high, the control unit can respond to the type of grain. By changing the rotation speed of the engine and controlling the discharge speed, the grain damage rate can be reduced. Furthermore, by setting the type of grain to be harvested by the harvesting work setting means at the start of work, the grain discharge speed is automatically changed at the time of discharge, so the engine speed is set by the engine control lever, etc. Work efficiency is improved.

  According to the invention which concerns on Claim 3, according to the setting of the harvesting object setting means, by changing the fin opening of the selection unit, it is possible to perform selection according to the type of grain and do not want to be damaged as much as possible. With regard to the grain, it is possible to reduce the damage rate by prioritizing the recovery to the Glen tank over the sorting accuracy.

The side view of the combine which concerns on the 1st Embodiment of this invention. The top view of the combine which concerns on the 1st Embodiment of this invention. The schematic diagram which shows the threshing part and the selection part which concern on the 1st Embodiment of this invention. The schematic diagram which shows the discharge device which concerns on the 1st Embodiment of this invention. The top view which shows the drive operation part of the combine which concerns on the 1st Embodiment of this invention. The enlarged view which showed the switch panel of the driver's seat shown in FIG. The control block diagram of the combine which concerns on the 1st Embodiment of this invention. The timing chart at the time of the harvest work of the combine which concerns on the 1st Embodiment of this invention. The timing chart at the time of the harvest work of the combine which concerns on the 1st Embodiment of this invention. The timing chart at the time of the harvest work of the combine which concerns on the 1st Embodiment of this invention. The timing chart at the time of the harvest work of the combine which concerns on the 1st Embodiment of this invention. The timing chart at the time of the discharge operation | work of the combine which concerns on the 1st Embodiment of this invention. The enlarged view which showed the switch panel of the driver's seat of the combine which concerns on the 2nd Embodiment of this invention. The timing chart at the time of the discharge operation | work of the combine which concerns on the 2nd Embodiment of this invention.

  Hereinafter, embodiments of a combine according to the present invention will be described with reference to the drawings.

<First Embodiment>
[Combine configuration]
As shown in FIG. 1 and FIG. 2, the combine 1 has a machine body 3 supported by a pair of left and right crawler travel devices 2. A pre-processing unit 5 that conveys the cereals to the rear of the machine body and delivers it to the feed chain 6 is provided so as to be movable up and down. Further, on the rear side of the pretreatment unit 5, a threshing unit 7 for threshing the cereals conveyed by the feed chain 6, and a post-processing unit 9 for processing the waste are provided, and the threshing unit 7 Is provided with a sorting unit 10 that sorts an object to be sorted (a mixture of threshed grains and impurities) leaked from the receiving net of the threshing unit 7 (see also FIG. 3). .

  On the other hand, a side of the pre-processing unit 5 is provided with a driving operation unit 11 on which an operator sits and operates, and on the rear side of the driving operation unit 11 and the side of the threshing unit 7, A Glen tank 12 for storing the grains selected by the selecting unit 10 is provided. The grain stored in the grain tank 12 is discharged out of the machine body by a discharge auger 13 as a discharge device.

  The pre-processing unit 5 is provided with a plurality of dividers 15 for weeding the cereals, a pulling device 16 for raising the cereals that have been weeded behind the dividers 15, and a reciprocating type that reaps the cereals. It is comprised from the cutting part 17 which has a cutting blade, and the grain conveying apparatus 19 which conveys the grain harvested by the harvesting part 17, and delivers to the feed chain 6, etc., The uncut ground of this pre-processing part 5 On the side, it is configured to be switchable between a working posture that protrudes to the side of the aircraft and guides the planted cereals to the weeds (dotted line position in FIG. 2) and a retracted posture that is drawn toward the aircraft side (solid line position in FIG. 2). A narrow guide 20 is provided.

  Moreover, as shown in FIG. 3, the threshing unit 7 for threshing the cereals harvested by the preprocessing unit 5 includes a handling cylinder 21 rotatably supported in the handling chamber and a receiving net 22 provided below the handling cylinder 21. And the threshing is carried out by handling the cereals between the handling cylinder 21 and the receiving net 22, and below the receiving net 22, a sorting unit 10 is provided. The oscillating flow plate 23 is disposed.

  The sorting unit 10 disposed below the threshing unit 7 is a swing sorting device 25 that swings back and forth in the front and rear of the machine body, and a tang fan 27 that blows sorting air into the dust sorting chamber 26. And a suction fan 29 for sucking the dust from the dust sorting chamber, and the grains selected by the swing sorting device 25 and the tang fan 27 are passed through the No. 1 spiral 32. In addition to being collected in the glen tank 12 by 31, the insufficiently sorted one is returned to the dust sorting chamber by the reduced spiral 35 through the second spiral 33.

  The oscillating sorting device 25 includes an oscillating flow plate 23, a chaff sheave 30 connected to the rear of the oscillating flow plate 23, and a grain sieve that performs sieving with the front and rear oscillating and sorting air below the chaff sheave 30. 34, the chaff sheave 30 has a large number of sorting fins 30a whose opening degree can be adjusted, and the fin opening degree is adjusted by the sorting fin control motor 78, thereby allowing the leakage of the object to be sorted. It is configured to be able to adjust the amount and control the flow rate of the selected air (see also FIG. 7).

  Further, as shown in FIG. 4, the grain tank 12 in which the grains selected by the sorting unit 10 are stored is formed narrower as it goes downward in a funnel shape, and at the bottom of the grain tank 12, A lateral spiral 36 extending in the longitudinal direction of the machine body is provided.

  The discharge auger 13 for discharging the grain in the grain tank extends vertically above and below the lateral spiral 36 and the longitudinal spiral to which the grain conveyed by the lateral spiral 36 is delivered. 37, the grain is delivered at the upper end of the vertical spiral 37, and the discharge spiral 39 for conveying the grain to the discharge port in the horizontal direction, and the auger cylinder 40a for storing the vertical spiral 37 and the discharge spiral 39, 40b (see also FIG. 1).

  The horizontal spiral 36, the vertical spiral 37, and the discharge spiral 39 are formed by winding helical blades 36b, 37b, 39b around the helical shafts 36a, 37a, 39a, respectively, and the upstream of the horizontal helical shaft 36a. A drive pulley 41 to which power from the engine is transmitted is provided at the side end. Further, bevel gears 42a and 42b are provided at the end portions of the horizontal helical shaft 36a, the vertical helical shaft 37a and the discharge helical shaft 39a, respectively, and are input to the drive pulley (horizontal helical shaft) 41. The rotation of the engine is transmitted to the helical shafts 36a, 37a, 39a via the bevel gears 42a, 42b, so that the discharge auger 13 is driven. That is, the horizontal helix 36, the vertical helix 37, and the discharged helix 39 form a conveying helix for conveying the grains to the outside of the machine, and these conveying helixes are driven in conjunction with the rotation of the engine 45. It is configured.

  Next, the configuration of the driving operation unit 11 will be described. As shown in FIG. 5, a driving seat 43 is disposed at the center of the driving operation unit 11, and a common rail engine 45 is disposed below the driving seat 43. Further, an ignition key 46 for starting the engine 45 is provided in front of the driver seat 43, and a multi-function for operating the left / right turn of the body 3 and the raising / lowering of the preprocessing unit 5 on the right side of the body of the ignition key 46. A steering lever 47 is provided.

  On the other hand, on the side of the driver's seat 43, a main transmission lever 49 for shifting the airframe 3 and a low speed position (vehicle loading / unloading), a medium speed position (standard), depending on the work purpose and cutting conditions, An auxiliary transmission lever 50 that can be switched between a high speed position (running) and a neutral position, and a switch panel 51 that includes various automatic switch groups are provided.

  Further, behind the driver's seat 43, an automatic auger switch 52 for automatically turning and storing the discharge auger 13, a discharge switch 53 for starting or stopping grain discharge, and an auger manual for manually operating the discharge auger 13 Lever 55 is provided.

  As shown in FIG. 6, the switch panel 51 includes a work switching dial (harvesting target setting means) 60 that can be switched according to the type of grain to be harvested and the work, and a sorting dial 61 that adjusts the opening of the sorting fin 30a. , A narrow guide switch 62 for switching the narrow guide 20 between a working posture and a retracted posture, a horizontal control switch 63 for turning on and off the horizontal automatic control of the machine body 3, a power clutch switch for operating connection / disconnection of the threshing clutch 82 and the cutting clutch 83 65 etc. are arranged.

  The work switching dial 60 includes a loading position set during loading work, a seed position set during seed grain harvesting, a wheat position set during wheat harvesting, and a handling position set during handling work. In addition, it has a rice position set at the time of rice harvesting, and the rotation speed of the engine 45 is automatically controlled by adjusting a dial to each of these work positions. Further, the work switching dial 60 is a dial push type dial, and when this dial is pressed, the work automatic switch 67 is turned on and off, and the automatic control of the engine speed is turned on / off. When automatic control of the engine speed is off (off), the engine speed is controlled according to the dial position scale (see also FIG. 7).

  Similarly to the work switching dial 60, the sorting dial 61 is a dial push type dial. By pressing this dial, the sorting automatic switch 69 is turned on and off. In the automatic mode, the sorting switch 61 is used. The opening of the sorting fin 30a is automatically adjusted according to the set grain type, and when the automatic control is off, the sorting fin 30a is fixed at the opening according to the dial position scale. Even in the automatic mode, the opening degree of the sorting fin 30a can be finely adjusted from the standard position according to the dial position.

  Further, the power clutch switch 65 is a seesaw type switch. When the (+) side 65a is pushed, the threshing clutch 82 and the cutting clutch 83 are connected in this order, and when the (−) side 65b is pushed, the cutting clutch 83, The threshing clutch 82 is cut in this order, and is configured to return to the neutral position when the finger being pressed is released.

  The threshing clutch 82 is a clutch that transmits the power from the engine 45 to the threshing unit 7, and the mowing clutch 83 is provided on the downstream side of the transmission of the threshing clutch 82, and the power from the engine 45 is forwarded. This is transmitted to the processing unit 5. Further, a transport HST 85 is provided between the threshing clutch 82 and the mowing clutch 83, and the power from the engine 45 is transmitted to the feed chain 6 and the preprocessing unit 5 through the transport HST 85.

[Configuration of control unit]
Next, the configuration of the control unit of this embodiment will be described. FIG. 7 is a control block diagram of the combine 1, and the above-described work switching dial 60, work automatic switch 67, power clutch switch 65, A sorting dial 61, a sorting automatic switch 69, a narrow guide switch 62, and a discharge switch 53 are connected, a main transmission lever potentiometer 72 that detects the operation position of the main transmission lever 49, and a conveyance HST rotation that detects the rotation of the conveyance HST85. A sensor 76, a sub-shift switch 73 that detects whether the sub-shift lever 50 is in a working position (low speed position and middle position) or a travel position (travel position, neutral position), and a vehicle speed sensor 75 that detects the moving speed of the combine 1. Etc. are connected.

  On the other hand, on the output side of the microcomputer 70, a control unit is formed together with the microcomputer 70, and the threshing / The cutting clutch control motor 77, the selection fin control motor 78 for adjusting the opening degree of the chaff sheave 30 (selection fin 30a), the narrow guide control motor 79 for switching the narrow guide 20 between the working posture and the retracted posture, and the rotation of the transport HST 85 are controlled. A transport HST control motor 80 and a discharge clutch control motor 81 for connecting / disconnecting a discharge clutch 86 for connecting / disconnecting transmission from the engine 45 to the discharge auger 13 are connected.

<Operation>
Next, the operation of the combine 1 will be described based on the time charts shown in FIGS.

<Operation during harvesting>
[When harvesting rice]
When the operator gets into the operation unit 11 of the combine 1, first, the work switching dial 60 is set to the rice position in accordance with the grain to be harvested, and the engine 45 is started (timing a in FIG. 8).

  When the power clutch switch (+) 65a is pushed to start the work, the microcomputer 70 drives the threshing / reaping clutch control motor 77 to connect the threshing clutch 82, and the power from the engine 45 is transferred to the threshing unit. 7 and the sorting fin control motor 78 is driven to bring the sorting fin 30a to the standard rice opening (timing b to c in FIG. 8).

  In addition, when the threshing clutch 82 is connected, the microcomputer 70 outputs an electrical command to the engine control microcomputer 71 to set the rotational speed of the engine 45 to the rated rotational speed (timing b to c in FIG. 8).

  The rated rotational speed is a rotational speed used during work, and is a rotational speed near the maximum torque on the torque curve of the engine.

[When harvesting wheat]
On the other hand, when harvesting wheat, when the operator gets into the driving operation unit 11, first, the work switching dial 60 is set to the wheat position and the engine 45 is started (timing d in FIG. 8).

  Then, when starting the work, when the power clutch switch (+) 65a is pushed, the microcomputer 70 drives the threshing / reaping clutch control motor 77 to connect the threshing clutch 82, as in the rice work. The power from the engine 45 is made to be able to be transmitted to the threshing unit 7, and the sorting fin control motor 78 is driven to set the sorting fin 30a to a standard wheat opening (timing ef in FIG. 8).

  In addition, when the threshing clutch 82 is connected, the microcomputer 70 outputs an electrical command to the engine control microcomputer 71 to set the rotational speed of the engine 45 to the rated rotational speed (timing ef in FIG. 8).

[When harvesting seeds]
Further, when harvesting seed kernels, when the operator gets into the operation unit 11, first, the work switching dial 60 is set to the seed position and the engine 45 is started (timing g in FIG. 8). ).

  When starting the work, when the power clutch switch (+) 65a is pressed, the microcomputer 70 drives the threshing / reaping clutch control motor 77 to connect the threshing clutch 82 as in the case of the rice and wheat work. Then, the power from the engine 45 can be transmitted to the threshing unit 7, and the sorting fin control motor 78 is driven to set the sorting fin 30a to the standard seed opening (timing hi in FIG. 8).

  Furthermore, when the threshing clutch 82 is connected, the microcomputer 70 outputs an electrical command to the engine control microcomputer 71 to set the rotation speed of the engine 45 to the seed rotation speed (timing hi in FIG. 8).

  The seed rotation speed is lower than the rated rotation speed and higher than the idling rotation speed, and is set to a rotation speed at which a harvesting operation can be performed without damaging the seeds.

  Further, the opening degree of the sorting fin 30a is set so as to decrease in the order of fully open position> seed standard position> rice standard position> wheat standard position> full closed position, and when seed grains are harvested. In order to increase the germination rate as much as possible, the sorting fin 30a is set on the open side, and priority is given to a smaller damage rate than sorting. That is, by increasing the opening degree of the sorting fin 30a, the grain is dropped into the first spiral 32 as much as possible and collected in the Glen tank 12, and returned to the dust sorting chamber by the second spiral 33 and the reduced spiral 35. Minimize damage to the grain.

  When the power clutch switch (−) 65b is pressed with the threshing clutch 82 connected, the idling rotational speed is set to the rotational speed of the engine 45 while the fin opening 30a is maintained. When the engine is turned off, the engine 45 is stopped and the fin opening is also in the fully closed position (timing c to d, timing f to g, timing i in FIG. 8).

  Then, as shown in FIG. 9, when the operator pushes the power clutch switch (+) 65a once more from the state where the threshing clutch 82 is connected, the microcomputer 70 controls the threshing / reaping clutch control. The motor 77 is driven to connect the mowing clutch 83 so that the power from the engine 45 can be transmitted to the preprocessing unit 5 (timing j in FIG. 9).

  Even if the cutting clutch 83 is connected, the opening degree of the fin and the engine speed are held at positions corresponding to the setting of the work switching dial 60, and the engine speed is changed by the engine control microcomputer 71. The rotation speed is automatically controlled based on the setting position of the dial 60. For example, even if the work load increases, the rotation speed is hardly changed.

[When harvesting rice]
If the main transmission lever 49 is operated to increase the speed in this state, the rotation speed of the transport HST 85 changes from the stopped state to the maximum rotation speed (timing k to l in FIG. 9), and the vehicle speed of the fuselage becomes the maximum speed at the time of work. (The timings k to m in FIG. 9), the combine 1 harvests rice while traveling in the field (timings k to n in FIG. 9). When the harvesting operation is completed, the operator decelerates the main transmission lever (timing n to p in FIG. 9), stops the vehicle, and also stops the transport HST85.

[During seed harvesting]
On the other hand, when harvesting seed kernels (timing q in FIG. 9), if the main transmission lever 49 is operated at an increased speed with the threshing clutch 82 and the mowing clutch 83 connected, the same as during rice harvesting work. Although the vehicle speed is the highest and the rotation speed of the transfer HST 85 is also the highest rotation speed (timing r to s in FIG. 9), the microcomputer 70 outputs an electrical command to be output to the transfer HST control motor 80 during rice harvesting work. And the rotational speed of the transport HST 85 with respect to the operation amount of the main transmission lever 49 is changed.

  That is, even if the microcomputer 70 detects the same amount of operation of the main transmission lever 49 by the main transmission lever potentiometer 72, during the seed harvesting operation, during the rice harvesting operation in which the transport HST 85 is accelerated at a normal setting rate. The speed of the transport HST85 is increased at a higher rate. As a result, during the seed harvesting operation, the feeding speed of the feed chain 6 is increased, and the conveying speed of the cereal is increased, so that the number of times the grain hits the tooth handling 21a of the handling cylinder 21 is reduced, and the grain during the threshing operation Grain damage can be reduced.

  Further, when the operator manually cuts the uncut area at the time of harvesting, the worker changes the work switching dial 60 to the hand-held position (timing x in FIG. 9). Then, the microcomputer 70 disconnects the harvesting clutch 83 and sets the rotation speed of the transport HST 85 to a handling rotation speed lower than the maximum rotation speed. Then, the cereal is supplied from the feed chain 6 and the handling operation is performed.

  Thereby, the worker can easily shift from the harvesting operation to the handling operation, and the work efficiency is improved.

  When the work switching dial 60 is in the wheat position during the harvesting operation, since the wheat has a larger grain volume than the rice, the microcomputer 70 rotates the transport HST 85 more than the rice operation as in the seed operation. Increase the speed increase. The seed harvesting operation may be performed by switching the operation switching dial 60 to the seed position during the rice harvesting operation or the wheat harvesting operation. In this case, the rotational speed of the engine 45 and the opening degree of the sorting fins 30a are directly transferred to the settings for the seed harvesting operation. Further, when switching from another harvesting operation to a handling operation, the cutting clutch 83 may be disconnected after detecting that the vehicle has stopped by the vehicle speed sensor 75.

  Next, the operation of the narrow guide 20 and the like during the harvesting operation described above will be described with reference to FIG. When the operator presses the power clutch switch (+) 65a and the cutting clutch 83 is connected, the microcomputer 70 outputs an electrical command to the narrow guide control motor 79 and keeps it in the retracted position until then. The narrow guide 20 is switched to the working posture (timing A to B, C to D in FIG. 10).

  When the power clutch switch (-) 65b is pushed from this state, the microcomputer 70 disconnects the mowing clutch 83 and changes the narrow guide 20 from the working posture to the retracted posture (timing B to C in FIG. 10). ).

  On the other hand, as described above, when the work switching dial 60 is in the handling position during the harvesting operation, the cutting clutch 83 is disengaged and the narrow guide 20 is also in the retracted position (timing D to F in FIG. 10). When the auxiliary transmission switch 73 detects that the auxiliary transmission lever 50 has been operated from the working position to the traveling position, the microcomputer 70 disconnects the mowing clutch 83 and the threshing clutch 82 and sets the narrow guide 20 to the storage position. (Timing G in FIG. 10).

  In addition, a separate work on / off switch is provided, and when the work on / off switch is in the off state or when the work switching dial 60 is in the loading position, the narrow guide 20 is automatically set to the storage position, The threshing and mowing clutches 82 and 83 may be in a disconnected state, and the auxiliary transmission switch 73 may be in a traveling state. Further, in the non-working state, the rotational speed of the engine 45 may be set to an idling rotational speed with the best fuel efficiency.

  On the other hand, as shown in FIG. 11, when the above-described auxiliary transmission switch 73 is in the travel position, the microcomputer 70 detects until the vehicle speed of the combine 1 reaches a predetermined vehicle speed by the vehicle speed sensor 75. The engine control microcomputer 71 maintains the rotational speed of the engine 45 at the idling rotational speed (timing H to I in FIG. 11).

  When the vehicle speed of the combine 1 becomes equal to or higher than the predetermined vehicle speed, the microcomputer 70 outputs an electric command to the engine control microcomputer 71 to set the engine speed to the rated speed (timing I to J in FIG. 11).

  When the operator increases the vehicle speed and travels for a certain period of time and then decelerates the main transmission lever 49, the vehicle speed is also reduced in conjunction with the operation (timing K to L in FIG. 11). And even if it detects that the vehicle speed of the combine 1 became below the predetermined vehicle speed (timing L of FIG. 11), the microcomputer 70 will make the engine rotational speed into idling rotational speed for the predetermined time T (for example, 3-5). Seconds) (timing L to M in FIG. 11), and if the vehicle speed recovers to a predetermined speed or more during that time, the engine rotation speed is maintained at the rated rotation speed (timing M to N in FIG. 11).

  On the other hand, when the vehicle speed of the combine 1 becomes equal to or lower than the predetermined speed and the predetermined time T elapses (timing N to O in FIG. 11), the microcomputer 70 outputs an electric command to the engine control microcomputer 71 and idles the engine speed. Rotation speed.

<Operation during discharging work>
Next, the work at the time of the discharge work will be described based on FIG.

[In the case of rice]
When the inside of the Glen tank is filled with grains by the harvesting operation described above, the operator presses the discharge switch 53 and starts the discharge operation. When the discharge switch 53 is turned on by the pressing operation, the discharge clutch control motor 81 is driven by the microcomputer 70, the discharge clutch 86 is connected, and the power from the engine 45 is supplied to each helical shaft 36a, 37a, 39a can be transmitted (timing P in FIG. 12).

  In this state, the microcomputer 70 outputs an electrical command corresponding to the rice position of the work switching dial 60 to the engine control microcomputer 71 to set the engine speed to the rated speed (timing P to Q in FIG. 12). . Thereby, the discharge auger 13 is driven, and the grain in the grain tank is conveyed by the horizontal spiral 36, the vertical spiral 37 and the discharge spiral 39, and discharged from the discharge port 13a of the discharge auger 13 to the outside.

  When the discharge switch 53 is pressed again and turned off (timing Q in FIG. 12), the discharge clutch 86 is disengaged, the engine speed is reduced to the idling speed, and the discharge auger 13 stops. As a result, the discharge operation is completed (timing Q to R in FIG. 12).

  When the work switching dial 60 is in the wheat position, the operation is the same as that in the case of the rice position, and the description thereof is omitted.

[For seeds]
On the other hand, when the harvested grain is a seed grain (timing S in FIG. 12), when the discharging switch 53 is turned on (timing T in FIG. 12), the discharging clutch 86 is the same as in the case of the rice. Are connected, and the rotation from the engine 45 can be transmitted to the discharge auger 13. In addition, since the work switching dial 60 is set at the seed position, the microcomputer 70 outputs an electrical signal to the engine control microcomputer 71 in accordance with the set position of the work switching dial 60 to set the rotational speed of the engine 45 to the seed. The rotation speed is set (timing TU in FIG. 12).

  As a result, the helical shafts 36a, 37a, 39a of the discharge auger 13 to which rotation from the engine 45 is directly output via the drive pulley 41 rotate at a seed rotation speed lower than the rated rotation speed, so that rice or wheat It is discharged from the discharge port 13a at a slower discharge speed (timing U to V in FIG. 12).

  When the discharge switch 53 is pressed again and turned off (timing V in FIG. 12), the discharge clutch 86 is disengaged, the engine rotation speed is reduced to the idling rotation speed, and the discharge auger 13 is driven. By stopping, the discharge operation is completed (timing V to W in FIG. 12).

  As described above, the work switching dial 60 that is switched according to the type of grain to be harvested is provided, and the engine rotation speed at the time of grain discharge is changed according to the type of grain set in the work switching dial 60. By having comprised so, the discharge speed of the discharge auger 13 driven in conjunction with the engine 45 can be controlled to an appropriate value according to the type of grain. That is, when discharging grain for seeds and the like, it is damaged by the transport spirals 36, 37, 39 of the discharge auger 13 at the time of discharge by slowing the discharge speed compared with the case of discharging normal rice or wheat. This can prevent the germination rate from being reduced. Further, if the work switching dial 60 is matched to the type of grain to be harvested, the discharge speed of the discharge auger 13 is automatically changed according to the type of the grain simply by operating the discharge switch 53. , Work efficiency is improved.

  Furthermore, since the rotational speed of the engine 45 is changed according to the grain type set by the work switching dial 60 even during the harvesting operation, the grain sorting accuracy can be improved.

  When the setting of the work switching dial 60 is the seed position, the opening degree of the sorting fins 30a is set to the open side compared with the rice, so that the seed kernel returns to the dust sorting chamber. The possibility of damage in the meantime can be reduced.

  Furthermore, when the setting of the work switching dial 60 is the seed position, the grain culm conveyance speed is made faster than that of rice, so that the possibility of the seed grain being damaged by the tooth handling can be reduced.

  In addition, since the function setting function of the work implement switching dial 60 is also used as an engine rotation speed adjustment dial, the opening of the sorting fin 30a is set to a standard position corresponding to the grain set by the work implement switching dial 60. Therefore, fine adjustment can be made by the selection dial 61. In addition, this kind setting function may be given to the selection dial 61, and in that case, the engine rotation speed can be finely adjusted from the kind of grain.

  Furthermore, in the running state, the engine rotation speed is automatically adjusted and the working machines such as the clutches 82 and 83 and the narrow guide 20 are not put into the working state, thereby facilitating the operation and the erroneous operation. Can be prevented. In addition, even when the vehicle speed becomes less than or equal to the predetermined rotational speed during traveling, the engine speed can be prevented from frequently going up and down because the predetermined delay time T is provided instead of the idling rotational speed immediately. It can contribute to improvement.

  In addition, in the said embodiment, although the conveyance spiral type discharge auger 13 was used as a grain discharge apparatus, while other forms, such as a conveyor type, may be sufficient, this discharge apparatus is independent from an engine. It may be provided with a drive motor. In this case, the microcomputer 70 controls the drive source for the discharge device to change the discharge speed.

<Second Embodiment>
Next, a second embodiment according to the present invention will be described. The second embodiment is different from the second embodiment in that the present invention is applied to a general-purpose combine and a soybean position is added to the work switching dial 60 according to the grain to be harvested. Further, the self-decomposing combine as in the first embodiment is different in that it has a Glen platform as a pre-processing unit and a threshing unit is composed of an axial flow type barrel. However, since such general differences are well-known matters, a detailed description thereof will be omitted. Furthermore, in the following description, the same names and reference numerals are used for the same configurations as those in the first embodiment, and only differences from the first embodiment will be described.

  As shown in FIG. 13, the work machine switching dial 60 is used for harvesting soybeans between the loading position and the seed position in addition to the above-described loading position, seed position, wheat position, handling position, and rice position. The soybean position set to is added. In addition, when a handling switch 64 is newly added without providing a handling position on the work machine switching dial 60 and this handling switch 64 is turned on (on), the preprocessing unit 5 When the reel rises and throws the cereal into it, it is conveyed by the feeder and can be handled.

  As shown in FIG. 14, when the work machine switching dial 60 is set to the soybean position (timing X in FIG. 14) and the discharge switch 53 is turned on (timing Y in FIG. 14), the discharge clutch 86 is connected. Thus, the rotation from the engine 45 can be transmitted to the discharge auger 13. Further, since the work switching dial 60 is set at the soybean position, the microcomputer 70 outputs an electrical signal to the engine control microcomputer 71 in accordance with the set position of the work switching dial 60, so that the rotation speed of the engine is rotated. To speed.

  As a result, each helical shaft of the discharge auger that directly outputs the rotation from the engine via the drive pulley rotates at a soybean rotation speed lower than the seed rotation speed, and discharges at a discharge speed slower than the seed. It is discharged from the outlet 13a (timing Y to Z in FIG. 14).

  When the discharge switch 53 is pressed again and turned off (timing Z in FIG. 14), the discharge clutch 86 is disengaged, the engine rotation speed is reduced to the idling rotation speed, and the discharge auger 13 is driven. By stopping, the discharge operation is completed.

  Thus, when discharging grains such as soybeans that are susceptible to damage, the rotation speed of the engine 45 is set to a slower soybean rotation speed than discharging seed grains, so that the discharge speed is reduced at the time of seeding. Even if it is a grain such as beans that are slower than that and are easily damaged by spiral, it can be prevented from being damaged during discharge.

  In addition, when the work switching dial 60 is in the soybean position, the sorting fin 30a has the same opening as that of the seed grain.

  In addition, any control applied in the first embodiment can be applied to the second embodiment, and in the first and second embodiments, how the above-described controls are combined. Then, the combine 1 may be controlled.

DESCRIPTION OF SYMBOLS 1 Combine 5 Pre-processing part 7 Threshing part 10 Sorting part 12 Glen tank 13 Discharge device (discharge auger)
36 Transport spiral (horizontal spiral)
37 Transport spiral (vertical spiral)
39 Conveyance spiral (discharge spiral)
45 Engine 60 Harvesting target setting means (work switching dial)
70 Control unit (microcomputer)
71 Control unit (engine control microcomputer)

Claims (3)

A pre-processing unit that harvests cereals, a threshing unit that threshs the cereals harvested by the pre-processing unit, a sorting unit that sorts the grains threshed by the threshing unit, and a grain that is sorted by the sorting unit In a combine comprising a grain tank for storing grains, and a discharge device for discharging the grains stored in the grain tank,
Harvest target setting means that is switched according to the type of grain that the combine harvests;
A controller that changes the discharge speed of the discharge device according to the setting of the harvesting target setting means when discharging the grain from the Glen tank,
Combine that is characterized by that. The discharge device has a transport spiral that is driven in conjunction with the rotation of the engine,
The control unit controls the engine rotation speed at the time of harvesting according to the setting of the harvesting target setting means, and controls the engine rotation speed at the time of grain discharge to change the discharge speed of the discharge device.
The combine according to claim 1. The control unit changes the fin opening of the selection unit according to the setting of the harvesting target setting unit.
The combine according to claim 1 or 2, characterized in that.

Images