KR100563715B1 - Combine - Google Patents

Abstract

The present invention relates to a combine equipped with a threshing conveying device such as a threshing feed chain.

A pretreatment conveying device for conveying the harvested rice at a speed linked to the vehicle speed is provided in the pretreatment for cutting the rice, while the threshing section having the threshing chamber is placed along the threshing chamber with the rice that is connected from the pretreatment conveying device. In a combine equipped with a threshing conveying device for conveying, the threshing conveying speed of the threshing conveying device is linked to the vehicle speed, and the threshing conveying speed at the low speed is faster than the pretreatment speed, and the threshing conveying speed at the high speed is equal to the preprocessing conveying speed. It is characterized by being set at about the same speed.

Description

Combine {Combine}

1 is a perspective view of a combine,

2 is a schematic side view of a pretreatment unit;

3 is a side view of the threshing unit;

4 is a cross-sectional view of the threshing unit;

5 is a power transmission diagram of the threshing unit;

6 is a front view of the blowing fan,

7 is a front view of the belt type CVT,

8 is a cross-sectional view of the engine-side variable pitch pulley,

9 is a cross-sectional view of the feed chain-side variable pitch pulley and drive case,

10 is a plan view of the sensor bracket,

11 is a side view of the peripheral speed lever,

12 is a rear view of the peripheral speed lever,

13 is a block diagram showing input and output of a feed chain shift control apparatus;

14 is a flowchart of feed chain shift control,

15 is a flowchart of a feed chain velocity target value calculation;

16 is a flowchart of the feed chain speed target value calculation 2,

17 is an explanatory diagram of a work machine rotation setting area;

18 is a graph showing a shift pattern A;

19 is a graph showing a shift pattern B;

20 is a graph showing a shift pattern C;

21 is a graph showing a shift pattern D;

22 is a graph showing a conventional threshing feed chain speed.

<Description of Symbols for Main Parts of Drawings>

1: Combine 2: Pretreatment

3: threshing part 4: rice tank

5: post-processing unit 6: operation unit

11: second pretreatment conveying apparatus 12: first pretreatment conveying apparatus

13: driving peripheral speed mechanism 16: threshing feed chain

23: blower fan 24: drive shaft

25 belt continuously variable transmission 26 variable pitch pulley (power source side)

27: variable pitch pulley (feed chain side) 28: electric belt

29: shift operation device 30: elastic body

31: input shaft 32: shifting sleeve

36: electric motor 36a: output shaft

37: motor bracket 41: sensor bracket

42: feed chain shift sensor 42a: sensor shaft

42b: sensor arm 43: feed chain shift controller

44: peripheral speed lever 48: work machine clutch switch

49: work machine rotation sensor

TECHNICAL FIELD This invention belongs to the technical field of the combine provided with the threshing conveying apparatus, such as a threshing feed chain.

Generally, the pretreatment conveying apparatus which conveys the cut rice to the vehicle speed is installed in the pretreatment part of this kind of combine, while the threshing part conveys the rice which was connected from the pretreatment conveying apparatus. A threshing conveying device for conveying along the threshing chamber is provided, but the conventional threshing conveying device has a constant conveying speed (linked to the engine speed and almost the same as the pretreatment conveying speed when cutting at high speed). When cutting at low speed or cutting at high speed, there may be a problem due to the speed difference between the threshing conveying apparatus and the preprocessing conveying apparatus. In other words, since the threshing conveyance speed greatly exceeds the pretreatment conveyance speed when cutting at a low speed, there is a possibility that conveyance instability may occur at the continuous portion, while the preprocessing conveyance speed greatly exceeds the threshing conveyance speed when cutting at a high speed. Therefore, there was a possibility that the threshing crest monolayer thickened and the threshing load increased.

Therefore, it is proposed to link the conveying speed of the threshing conveying apparatus at the same vehicle speed as the pretreatment conveying apparatus. Thus, in this case, not only the problem of unstable conveyance in the continuous portion can be prevented, but also the thickness of the threshing rice can be maintained almost constant regardless of the vehicle speed. When threshing high load materials, such as a material, a wet material, and the fall down material, there existed a problem that threshing load increased still.

In addition, a threshing conveying transmission device for shifting the conveying speed of the threshing conveying device based on the driving of the shifting operation device is provided on the power supply path of the threshing conveying device, and the threshing conveying transmission device is shifted in response to a vehicle speed or the like. Although it is proposed to operate, in this case, since it is necessary to arrange the transmission operation apparatus in the vicinity of the threshing conveyance transmission device, there is a problem that the threshing part becomes wider and causes an enlargement of the apparatus body.

Furthermore, a belt type continuously variable transmission device for continuously varying the conveying speed of the threshing conveying device based on the driving of the actuator is provided on the power supply path of the threshing conveying device, and the belt type continuously variable transmission device is adapted to the vehicle speed or the like. Although shifting operation is proposed, if the responsiveness to the speed increase side of the belt type continuously variable transmission is poor, there is a problem that the threshing load in the threshing conveying apparatus becomes thick and the threshing load temporarily increases.

The present invention was made in view of the above-described situation and was created for the purpose of solving these problems, and the first invention is a pre-processing conveying apparatus for conveying the cut rice to a vehicle speed at a pre-processing portion to cut rice. In the combiner provided with the threshing chamber, the threshing conveying apparatus which conveys the rice which was connected from the preprocessing conveying apparatus along the threshing chamber is provided, The conveying speed of the threshing conveying apparatus is linked to a vehicle speed. In shifting, the conveying speed of the threshing conveying device is set to be higher than the vehicle speed interlocking speed of the pretreatment conveying device when driving at low speed and medium speed, and at the same speed as the vehicle speed interlocking speed of the preprocessing conveying device when driving at high speed. It is characterized by. In other words, the threshing conveying speed is faster than the pretreatment conveying speed when the threshing conveying speed is linked to the vehicle speed, and when the medium speed cutting to cut a large number of materials, or the low speed cutting to cut wet materials or fallen down materials, etc. Since the continuity of the grain does not fluctuate significantly), the layer thickness of the threshing rice can be reduced to reduce the threshing load. In addition, since the threshing conveying speed is almost the same speed as the pretreatment conveying speed, the high efficiency work can be carried out while preventing the conveyance instability of the continuous portion.

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And the 3rd invention provides the preprocessing conveying apparatus which conveys the harvested rice at the speed which linked the rice to the vehicle speed in the preprocessing part which cut | disconnects rice, and the threshing part which has been threshed in the threshing part provided with a threshing chamber is connected from the preprocessing conveying apparatus. A combine equipped with a threshing conveying apparatus for conveying rice along the threshing chamber, wherein a threshing conveying apparatus is provided on a power supply path of the threshing conveying apparatus by installing a belt type continuously variable transmission that performs belt transmission between a pair of variable pitch pulleys. The variable pitch pulley on the apparatus side is forcibly shifted by the driving force of the actuator while the variable pitch pulley on the power source side is shifted by the force of the elastic body acting in the direction of increasing the pitch diameter. Actuators forcibly shifting the shifting operation unit move integrally with the shifting operation unit with the driving of the actuator. It is characterized by. In other words, in the case where the variable pulley on the threshing conveying device side is forcibly shifted to the speed increasing side, the variable pitch pulley on the power source side shifts to the speed increasing side while receiving the force of the elastic body. Compared to the case where the shifting operation is performed, the shifting operation is performed faster, and as a result, the threshing load can be reduced by improving the response to the speed increasing side of the belt continuously variable transmission.

(Example)

Next, one embodiment which concerns on this invention is described based on drawing. In the drawing, reference numeral 1 denotes a combine, and the combine 1 includes a pretreatment unit 2 for cutting rice, a threshing unit 3 for threshing rice grains from the cut rice, and further selecting rice. A rice tank (4) storing rice, a post-processing unit (5) for discharging rice straw after threshing, an operation unit (6) arranged with various operating mechanisms, a traveling unit (7) provided with a pair of crawler running bodies, and the like. It is composed of, the basic configuration of any of these are the same.

The pretreatment unit 2 includes a divider 8 for dividing rice that has not yet been cut, an upright device 9 for raising divided rice, a blade 10 for cutting the root position of rice, and a rice to be described later. It consists of the 1st preprocessing conveying apparatus 12 etc. which hold | maintains and conveys to the 2nd preprocessing conveying apparatus (threshing depth conveyance body) 11, The said mounting apparatus 9, the blade 10, and the 1st preprocessing conveying apparatus 12 and the second pretreatment conveying apparatus 11 are supplied with engine power via the traveling peripheral speed mechanism 13 (hydrostatic stepless speed change unit, HST (Hydro Static Transmission)), Pruning and conveying of rice are performed.

The second pretreatment conveying apparatus 11 is provided with a seeding position conveying chain 14 for conveying the seeding position side of rice and a rice feeding conveying member 15 for conveying the tip of rice earing. 2 The whole pre-processing conveying apparatus 11 is forcibly rotated to the up-down direction by carrying out a threshing depth motor (not shown) with the conveyance end side as a support point. In other words, when the second preprocessing conveying apparatus 11 continuously receives rice at the conveying end of the first preprocessing conveying apparatus 12, it is possible to move the held position up and down according to the forced rotation. In order to adjust the threshing depth in the threshing part 3 by changing rice holding position of threshing feed chain (threshing conveying apparatus) 16 continuously at the terminal part of the 2nd preprocessing conveying apparatus 11. It is.

On the other hand, the threshing unit 3 is composed of a threshing chamber 18 in which the rotary body 17 is embedded, and a sorting chamber 19 in which various sorting devices are built. The threshing chamber 18 receives the ear tip side of the rice which the threshing feed chain 16 conveys along the threshing chamber 18, and threshes the ear tip side of the rice which has been received by the rotational force of the rotary body 17. Since the engine body is not fed to the rotary body 17 and the various sorting devices through the traveling peripheral speed mechanism 13, the speed according to the engine speed (usually, the engine speed is fixed at the rated rotation). The threshing treatment rate is almost constant).

The threshing feed chain 16 is disposed in the outer surface portion of the threshing portion 3 in the front-rear direction, and the rice conveyed to the end of the second preprocessing conveying apparatus 11 described above is in a posture direction in the left-right direction. At the same time, the drive sprocket 21 of the threshing feed chain 16 is conveyed backward along the threshing chamber 18 while keeping the successive rice padding position side of the rice paddle between the support rails 20. Drive shaft 22 supporting the shaft is belt-type from the drive shaft 24 of the blower fan (bulb fan) 23 built in the left and right directions at the front end of the threshing section 3 (selection chamber 19). The power of the threshing part is input through the continuously variable transmission 25, and the power is decelerated and supplied to the drive sprocket 21.

The belt-type continuously variable transmission device 25 includes a pair of variable pitch pulleys whose pitch diameters (diameters for winding the belt) change according to the axial movement of the slide pulleys 26b and 27b with respect to the fixed pulleys 26a and 27a. (26, 27), and the electric belt 28 is wound around the pair of variable pitch pulleys (26, 27). Then, when the variable pitch pulley 27 is forcibly shifted in the pitch diameter increasing direction as the driving force of the shifting operation device 29 described later, the other side to which the force is applied by the elastic body 30 in the pitch diameter increasing direction is applied. The variable pitch pulley 26 receives the belt tension stronger than the bias force of the elastic body 30 and is continuously shifted in the pitch diameter reducing direction, and the variable pitch pulley 27 is forcibly shifted in the pitch diameter reducing direction. When operated, the other variable pitch pulley 26 receives the force of the elastic body 30 that is stronger than the belt tension and is shifted continuously in the pitch diameter increasing direction. In other words, the pair of variable pitch pulleys 26 and 27 have a pitch diameter which is betrayed by the drive of the shifting mechanism 29, and the conveying operation speed of the threshing feed chain 16 is based on the change of the pitch diameter. It is supposed to shift steplessly.

In connecting the variable pitch pulleys 26 and 27 to the input shaft 31 of the drive case 22 and the drive shaft 24 of the blower fan 23, the shift force is forcibly shifted by the driving force of the shift operation device 29. The variable pitch pulley 27 is connected to the input shaft 31 of the drive case 22 while the variable pitch pulley 26 is shifted in the direction of increasing the pitch diameter by the force of the elastic body 30. It is connected to the drive shaft 24 of 23). That is, when the variable pitch pulley 27 of the threshing feed chain 16 is forcibly shifted to the slave side, the variable pitch pulley 26 on the engine side is shifted to the speed increasing side while receiving the bias force of the elastic body 30. Therefore, the speed change operation is performed faster than the case where the speed change operation is performed to the speed increasing side while resisting the bias force of the elastic body 30, and as a result, the response to the speed increase side of the belt type continuously variable transmission 25 is improved.

Reference numeral 32 is a shift sleeve provided inside the variable pitch pulley 27. The shift sleeve 32 is free to rotate in the axial rotation direction with respect to the slide pulley 27b (shift shifting portion). It is connected via the bearing 33 which moves integrally in the direction. On the other hand (34) is a support cylinder of the input shaft 31 protruding outward from the drive case 22, the spiral groove 34a of a predetermined pitch is formed in the outer peripheral portion of the support cylinder 34, Since the ball 35 held in the inner circumferential portion of the shift sleeve 32 is fitted into the spiral groove 34a, when the shift sleeve 32 rotates forward and backward in the axial rotation direction, the guide of the spiral groove 34a is guided. The furnace shift sleeve 32 and the slide pulley 27b move forward and backward integrally in the axial direction, and the variable pitch pulley 27 is forcibly shifted in accordance with the pulley displacement.

Reference numeral 36 is an electric motor (actuator) having a reduction mechanism installed on the outer periphery of the shift sleeve 32 via a motor bracket 37, and is provided on the output shaft 36a of the electric motor 36. Since the small gear 38 is engaged with the large gear 39 fixed to the outer periphery of the shift sleeve 32, the shift sleeve 32 is rotated in accordance with the motor drive, and then the slide pulley as described above. (B) is forcibly shifted. The pin 40 is protruded from the motor bracket 27 in which rotation in the axial rotation direction is freely supported on the shifting sleeve 32, while being fixedly installed on the drive case 22. The sensor bracket 41 is provided with a guide hole 41a in the form of an elongated hole which restricts rotation of the pin 40 in the axial rotational direction and allows movement in the axial direction (sleeve movement direction). The electric motor 36 being driven rotates in the axial rotation direction Without this, the shift sleeve 32 and the slide pulley 27b are integrally moved in the axial direction. That is, since the shift operation device 29 including the electric motor 36, the shift sleeve 32, and the like can be configured as an integrated assembly with the variable pitch pulley 27, the shift operation device 29 and the belt type continuously variable transmission. The arrangement space of the sphere 25 can be made as small as possible, and the assembly work can be simplified.

42 is a feed chain shift sensor (potentiometer) assembled in the sensor bracket 41, and a sensor arm elastically contacting the pin 40 on the sensor shaft 42a of the feed chain shift sensor 42. 42b is integrally provided. In other words, the shift position of the slide pulley 27b (shift sleeve 32) is detected in accordance with the position detection of the pin 40. The sensor bracket 41 and the pin 40 are the electric motor 36 as described above. Since it is also used for the rotation control member of the present invention, the number of parts can be reduced and the structure can be simplified.

However, the belt type continuously variable transmission mechanism 25 is disposed below the threshing feed chain 16 and more inside the thrust body than the threshing feed chain 16. The driving case 22 and the shift operation device 29 ) Is disposed inside the machine body than the belt type continuously variable transmission mechanism 25, so that the drive case 22 or the shifting mechanism 29 protrudes outward from the machine body to increase the width dimension of the threshing part 3. The problem can be avoided.

In addition, the drive case 22 and the shift operation device 29 are spaces in front of the blowing fan 23 provided at the front end of the threshing unit 3 (a space between the pretreatment unit 2 and the threshing unit 3). ] Is used. Therefore, as compared with the case where the space inside the threshing part 3 is ensured, the threshing part 3 can not only be enlarged, but also the structure of the threshing part 3 can be implemented without making a big change. .

In addition, the driving case 22 and the shift operation device 29 are disposed below the rice conveyance path of the threshing feed chain 16 when viewed from the side, and thus the conveying rice of the threshing feed chain 16 is driven. It is possible to avoid the problem of unstable conveyance due to interference with the case 22 or the shifting operation device 29.

On the other hand, reference numeral 43 denotes a feed chain shift controller configured using a microcomputer (including an MPU, ROM, RAM, etc.), and the feed chain shift sensor 42 described above is provided on the input side of the feed chain shift controller 43. ), Peripheral speed lever position sensor 45 for detecting the lever position of the peripheral speed lever (driving shift lever) 44, vehicle speed sensor 46 for detecting the vehicle speed, engine rotation sensor 47 for detecting engine rotation, A work machine clutch switch 48 for detecting the drive of a work machine clutch (not shown) and a work machine rotation sensor 49 for detecting work machine rotation (threshing power rotation) are connected via an input interface circuit, while the output side has described above. The electric motor 36 is connected via an output interface circuit. That is, the feed chain shift control device 43 is provided with a control program of "feed chain shift control" for shifting the conveying speed of the threshing feed chain 16 in accordance with the vehicle speed and threshing load. Will be described based on the flowchart. However, in the flowchart, V is the vehicle speed, V1 and V2 are the vehicle speed set values (V1 <V2), VH1 and VH2 are the feed chain speed set values, FDCTGT is the feed chain speed target value, FHSNS is the feed chain speed present value, and SGRPM is the work. Opportunity transfer, PRESGR is the previous work cycle, α is dead zone.

In the &quot; feed chain shift control &quot;, it is first determined whether or not the engine is rotating and the work machine clutch has entered (process A). That is, it is judged whether or not threshing work is carried out, and if the judgment is NO, the driving of the electric motor 36 is stopped, but the combine 1 of the present embodiment is provided with a work machine rotation sensor 49, and thus the above-described processing is performed. The same result can be obtained even if A is replaced with the processing B for judging the working machine rotation. Further, the processing A or the processing B may be executed at the C position of the flowchart. In this case, even if the determination is NO, the driving of the electric motor 36 to the speed increasing side can be allowed.

If the determination result of the processing A is YES, the vehicle speed V is calculated (process D) based on the peripheral speed lever position and the engine speed, and then the "feed chain speed target value calculation" (subroutine) described later is performed. Although the combine 1 of this embodiment is equipped with the vehicle speed sensor 46, the said process D may be abbreviate | omitted.

After calculating the feed chain speed target value, the deviation (absolute value) of the feed chain speed current value FHSNS with respect to the feed chain speed target value FDCTGT is compared with the dead zone α, and the deviation is dead band α. ), The motor drive is stopped, and when the deviation exceeds the dead zone (α), the electric motor 36 moves in the direction in which the feed chain speed current value (FHSNS) approaches the feed chain speed target value (FDCTGT). When the motor is driven, not only the motor driving is stopped based on the limit judgment, but also the timer (acceleration-side timer or deceleration-side motor) set for each driving direction is started to move in the reverse direction until this timer ends. It is designed to regulate the motor drive.

In the &quot; feed chain speed target value calculation &quot;, first, it is determined whether the current vehicle speed V is smaller than the vehicle speed first set value V1 (low speed driving determination reference value), and when this determination is YES, the feed chain The speed first set value VH1 (set lower limit speed) is set to the feed chain speed target value FDCTGT. In other words, in linking the threshing feed chain speed to the same vehicle speed as the pretreatment conveying speed, the threshing feed chain speed is maintained at a constant speed in the low-speed driving region where vehicle speed fluctuations tend to occur. The problem that the instability of conveyance can be prevented can be prevented, and the feed chain speed first set value VH1 is faster than the pre-treatment conveyance speed at the time of cutting at low speed (the range in which the continuous continuation of rice does not fluctuate) is wet. It is possible to reduce the threshing load by reducing the layer thickness of threshing rice at the time of low speed cutting to cut materials and fallen materials.

On the other hand, when the current vehicle speed V is equal to or higher than the vehicle speed first set value V1, it is determined whether the current vehicle speed V is smaller than the vehicle speed second set value V2 (medium speed driving determination reference value), and this determination is made. In the case of YES, the feed chain speed target value FDCTGT linked to the vehicle speed V is calculated using the following formula.

FDCTGT ← K1, V + K2

However, K1 = (VH2-VH1) / (V2-V1)

    K2 = VH1- (VH2-VH1) / (V2-V1) V1

In other words, when cutting at medium speed, the threshing feed chain speed is linked to the vehicle speed, thereby not only preventing the problem of unstable conveyance in the continuous portion, but also maintaining the layer thickness of the threshing rice almost constant regardless of the vehicle speed. In addition, since the feed chain speed calculated by the above formula is faster than the pre-processing conveying speed (a range in which the continuous continuation of the rice does not fluctuate significantly), the layer of threshing rice at the time of the medium speed cutting to cut a large number of materials, etc. The thickness can be reduced and the threshing load can be reduced.

When the current vehicle speed V is equal to or higher than the vehicle speed second set value V2, the feed chain speed second set value VH2 (virtual set upper limit speed) is set to the feed chain speed target value FDCTG. That is, in linking the threshing feed chain speed to the same vehicle speed as the pre-processing conveying speed, the threshing feed chain speed is increased to the set upper limit speed between the medium speed driving area and the high speed driving area, and maintained at the set upper limit speed in the high speed driving area. Therefore, the threshing feed chain speed at the time of the medium speed cutting that cuts a large number of materials can be reduced as fast as possible in the range where the continuous connection of rice does not greatly fluctuate, thereby reducing the threshing load, and the set upper limit speed (load linkage described later). Area) is set at a speed substantially equal to the pre-processing conveyance speed at the time of cutting at high speed, so that high-efficiency work can be performed while preventing unstable conveyance of the continuous part at the time of high speed cutting.

When the feed chain speed second set value VH2 is set in the feed chain speed target value FDCTGT, the load of the threshing section 3 is determined based on the current work machine rotation speed SGRPM. That is, when the present work machine rotation speed SGRPM is less than the work machine rotation lower limit set value Smin, it is determined that the threshing part 3 is in a high load state, while the current work machine rotation speed SGRPM is the work machine rotation middle set value Sh. In many cases, it is determined that the threshing part 3 is in a low load state, and the threshing part when the current working machine speed SGRPM is equal to or greater than the working machine rotation lower limit set value Smin and less than the working machine rotation middle set value Sh. (3) is judged to be an appropriate load state.

If the previous time is a proper load state (determined based on the previous work machine rotation speed PRESGR), and the current is a high load state, the speed-up counter C is increased (C ← C + 1) while the previous time is In case of proper load state and low load state, reduce the speed increase counter (C ← C-1), and then calculate the final feed chain speed target value (FDCTGT) using the following formula. It is.

FDCTGT ← C · (VHmax-VH2) / n + FDCTGT

In other words, while the threshing feed chain speed is linked to the vehicle speed and the threshing load is easy to increase the threshing load, the threshing feed chain speed is increased or decreased stepwise (n step) based on the threshing load. It is possible to keep the threshing load in an appropriate state because it does not significantly fluctuate.

In addition, in the case of increasing the threshing feed chain speed in response to the threshing load, after setting the L flag (low speed rotating flag), the set state of the H flag (high speed rotating flag) is judged. When increasing the speed increase counter C only in the case of a set and decelerating the threshing feed chain speed in response to the threshing load, after setting the H flag, the set state of the L flag is judged. Only in this set, the speed increasing counter C is decremented. In other words, since the sudden increase and decrease of the threshing feed chain speed is regulated, the stability of the feed chain shift control can be improved. In addition, as a method of regulating the rapid increase / deceleration of threshing feed chain speed, as shown in "Feed-chain speed target value calculation (2)", the clock of H timer (T2) or L timer (T1) is started depending on the load condition. The deceleration or increase of the speed increase counter C may be delayed until this timer time elapses.

In the above-described configuration, the belt-type continuously variable transmission device 25 for shifting the conveying speed of the threshing feed chain 16 is provided on the power supply path of the threshing feed chain 16. In shifting the shifting device 25 based on the drive of the shifting operation device 29, since the shifting device 29 is disposed inside the body of the belt-type continuously variable transmission device 25, the shifting operation is performed. There is no problem that the device 29 protrudes outward from the apparatus body to increase the width dimension of the threshing part 3, and as a result, when the speed change control device 29 is disposed in the vicinity of the belt type continuously variable transmission 25, Therefore, the enlargement of the body of the apparatus can be avoided.

In addition, since the shift operation apparatus 29 is disposed in the front space of the blowing fan 23 provided at the front end of the threshing part 3, not only can the space in front of the blowing fan 23 be used effectively, It is not necessary to secure an arrangement space of the shifting operation device 29 inside the threshing part 3, and as a result, there is an advantage that it can be carried out without changing the internal structure of the threshing part 3.

In addition, since the shifting operation device 29 is disposed below the threshing feed chain 16, the transfer rice of the threshing feed chain 16 interferes with the shifting operation device 29, thereby avoiding the problem that the conveyance becomes unstable. Can be.

Further, the variable pitch pulley 27 on the threshing feed chain 16 side of the belt-type continuously variable transmission device 25 is forcibly shifted by the driving force of the electric motor 36, while the variable pitch pulley on the engine side ( In the case where the variable pitch pulley 27 on the threshing feed chain 16 side is forcibly shifted to the speed increasing side, the engine is shifted by the force of the elastic body 30 acting in the pitch diameter increasing direction. The variable pitch pulley 26 on the side is shifted to the speed increasing side while receiving the force of the elastic body 30. In other words, the gear shifting operation is faster than the case of shifting to the speed increasing side while resisting the bias force of the elastic body 30. As a result, the belt-type continuously variable transmission 25 improves the response to the speed increasing side to reduce the threshing load. Can be.

Moreover, since the electric motor 36 which forcibly moves the slide pulley 27b of the variable pitch pulley 27 moves integrally with the slide pulley 27b according to the drive of this electric motor 36, The motor 36 (shifting mechanism 29) can be configured as an integral assembly with the variable pitch pulley 27, and as a result, the arrangement space of the belt-type continuously variable transmission device 25 including the electric motor 36. Can be made as small as possible.

In addition, in linking the threshing feed chain speed to the vehicle speed, the threshing feed chain speed at the time of cutting at low speed and cutting at the middle speed is set faster than the pretreatment conveying speed. The threshing feed chain speed can be prevented in the range where rice continuity does not fluctuate during medium speed cutting to cut negative materials and low speed cutting to cut wet materials and fallen materials. As a result, it is possible to reduce the threshing load by thinning the layer thickness of the majority of the material, the wet material, and the collapsed material.

Moreover, the threshing feed chain speed rises to the set upper limit speed between the medium speed driving area and the high speed driving area, and maintains the set upper limit speed in the high speed driving area. It can be made faster in the range that the continuous continuation of the rice does not fluctuate significantly, and as a result, the thickness of the layer of the large-capacity material can be made thinner and the threshing load can be reduced.

In addition, since the threshing feed chain speed is maintained at the set lower limit speed at the time of low speed cutting, which is susceptible to vehicle speed fluctuations, instability of conveyance due to the vehicle speed fluctuation can be prevented.

On the other hand, in the case of high speed cutting which normally cuts the material, the threshing feed chain speed is set to almost the same speed as the pretreatment conveying speed, so that high efficiency work can be performed while preventing conveyance instability of the continuous portion.

When the high speed cutting is performed, the threshing feed chain speed is linked to the vehicle speed while the threshing feed chain speed is linked to the threshing load. Can also be prevented.

It goes without saying that the present invention is not limited to the above embodiment, and for example, the shift pattern of the threshing feed chain 16 is not limited to the shift pattern A of the above embodiment. Patterns B to D may be employed. In the shift pattern B, the threshing feed chain speed is interlocked with the vehicle speed and the threshing load in almost the entire area of the vehicle speed fluctuation range. You can prevent it.

In addition, the shift pattern C is to link the threshing feed chain speed of the low speed driving region and the medium speed driving region to the vehicle speed and the threshing load, and to interlock the threshing feed chain speed of the high speed driving with the threshing load only.

In addition, the shift pattern D links the threshing feed chain speed of the medium speed driving region to the vehicle speed and the threshing load, while interlocking the threshing feed chain speed during the high speed driving with only the threshing load.

Claims (3)

In the pre-processing part which cuts rice, the pre-processing conveying apparatus which conveys the cut | disconnected rice at the speed which linked the vehicle speed is provided, In the combiner provided with the threshing conveying apparatus which conveys the rice which was connected from the preprocessing conveying apparatus along the threshing chamber in the threshing part provided with a threshing chamber, In shifting the conveying speed of the threshing conveying apparatus in conjunction with the vehicle speed, The combine speed of the threshing conveying device is set to be higher than the vehicle speed interlocking speed of the pretreatment conveying device when driving at low speed and medium speed, and at the same speed as the vehicle speed interlocking speed of the preprocessing conveying device when driving at high speed. . delete In the pre-processing part which cuts rice, the pre-processing conveying apparatus which conveys the cut | disconnected rice at the speed which linked the vehicle speed is provided, In the threshing unit provided with a threshing chamber, the threshing conveying apparatus which conveys the rice which was connected from the preprocessing conveying apparatus along the threshing chamber is provided, Comprising: Between a pair of variable pitch pulleys in the power supply path of the threshing conveying apparatus. A belt-type continuously variable transmission that performs belt transmission at the motor is operated to forcibly shift the variable pitch pulley on the threshing conveying device side by the driving force of the actuator. In shifting the variable pitch pulley on the power source side by the force of the elastic body acting in the direction of increasing the pitch diameter, And the actuator for forcibly moving the shift operation portion of the variable pitch pulley moves integrally with the shift operation portion with the driving of the actuator.

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