阅读说明：本技术 联合收割机 (Combine harvester ) 是由 奥村和哉 钉宫启 三宅达也 西崎宏 冈崎秀范 土居原纯二 竹内贤一朗 于 2020-12-17 设计创作，主要内容包括：本发明提供抑制行驶装置的行驶速度的急加减速,使行驶安全性优异的联合收割机。该联合收割机在搭载有发动机(E)的机体框架(1)的下侧设有行驶装置(2),在机体框架(1)的前侧设有收割装置(3),在收割装置(3)的后方左侧设有脱粒装置(4),在收割装置(3)的后方右侧设有操纵部(5),其特征在于,在操纵部(5)设有进行行驶装置(2)的加减速的变速杆(21),在变速杆(21)的操作速度比预定的速度更快的情况下,进行发动机(E)的输出转速的加减速,在变速杆(21)的操作速度比预定的速度更慢的情况下,不进行发动机(E)的输出转速的加减速。(The invention provides a combine harvester which restrains the rapid acceleration and deceleration of the running speed of a running device and has excellent running safety. The combine harvester is characterized in that a traveling device (2) is arranged below a machine body frame (1) provided with an engine (E), a harvesting device (3) is arranged at the front side of the machine body frame (1), a threshing device (4) is arranged at the rear left side of the harvesting device (3), and an operating part (5) is arranged at the rear right side of the harvesting device (3), wherein the operating part (5) is provided with a gear lever (21) for accelerating and decelerating the traveling device (2), when the operating speed of the gear lever (21) is higher than a preset speed, the output rotating speed of the engine (E) is accelerated and decelerated, and when the operating speed of the gear lever (21) is lower than the preset speed, the output rotating speed of the engine (E) is not accelerated and decelerated.)

1. A combine harvester, which is provided with a running device (2) at the lower side of a machine body frame (1) carrying an engine (E), a harvesting device (3) at the front side of the machine body frame (1), a threshing device (4) at the rear left side of the harvesting device (3), and an operating part (5) at the rear right side of the harvesting device (3),

a shift lever (21) for accelerating and decelerating the traveling device (2) is provided in the control unit (5),

the control device is configured to accelerate and decelerate the output rotation speed of the engine (E) when the operation speed of the shift lever (21) is higher than a predetermined speed, and to not accelerate and decelerate the output rotation speed of the engine (E) when the operation speed of the shift lever (21) is lower than the predetermined speed.

2. A combine harvester according to claim 1,

the control device is configured to accelerate and decelerate the output rotation speed of the engine (E) when the operation position of the shift lever (21) is at a predetermined position when the operation speed of the shift lever (21) is slower than a predetermined speed, and to not accelerate and decelerate the output rotation speed of the engine (E) when the operation position of the shift lever (21) is not at the predetermined position.

3. A combine harvester according to claim 1,

the speed control device is configured to accelerate the output rotation speed of the engine (E) when the shift lever (21) is operated from a neutral position to a forward position, and to decelerate the output rotation speed of the engine (E) when the shift lever (21) is operated from the forward position to the neutral position.

4. A combine harvester according to claim 2,

the speed control device is configured to accelerate the output rotation speed of the engine (E) when the shift lever (21) is operated from a neutral position to a forward position, and to decelerate the output rotation speed of the engine (E) when the shift lever (21) is operated from the forward position to the neutral position.

5. A combine harvester according to claim 3,

the speed increasing amount of the output rotation speed of the engine (E) is determined according to the operation amount of the gear lever (21) operated from a neutral posture to a forward posture, and the speed reducing amount of the output rotation speed of the engine (E) is determined according to the operation amount of the gear lever (21) operated from the forward posture to the neutral posture.

6. A combine harvester according to claim 4,

the speed increasing amount of the output rotation speed of the engine (E) is determined according to the operation amount of the gear lever (21) operated from a neutral posture to a forward posture, and the speed reducing amount of the output rotation speed of the engine (E) is determined according to the operation amount of the gear lever (21) operated from the forward posture to the neutral posture.

7. A combine harvester according to any one of claims 1 to 6,

the speed reduction of the output rotation speed of the engine (E) is limited when the thickness of the grain layer on the screening frame of the threshing device (4) is more than a predetermined value.

8. A combine harvester according to any one of claims 1 to 6,

the control device is configured to limit deceleration of the output rotation speed of the engine (E) when the load of the engine (E) is greater than or equal to a predetermined value.

9. A combine harvester according to claim 7,

the control device is configured to limit deceleration of the output rotation speed of the engine (E) when the load of the engine (E) is greater than or equal to a predetermined value.

Technical Field

The present invention relates to a combine harvester capable of accelerating and decelerating the output rotation speed of an engine and the running speed of a running device by operating a shift lever.

Background

In a conventional combine harvester, a technology is known in which an output rotation speed of an engine and a traveling speed of a traveling device are accelerated and decelerated by operating a shift lever (see patent document 1).

Documents of the prior art

Patent document

Patent document 1: japanese patent laid-open No. 2000-161090

Disclosure of Invention

Problems to be solved by the invention

However, in the technique of patent document 1, when the shift lever is operated to accelerate or decelerate the output rotation speed of the engine and the running speed of the running device, the running speed of the running device is abruptly accelerated or decelerated, and therefore, there is a risk of rushing into the field and the like.

Accordingly, an object of the present invention is to provide a combine harvester that suppresses rapid acceleration and deceleration of the traveling speed of the traveling device and has excellent traveling safety.

Means for solving the problems

The present invention for solving the above problems is as follows.

That is, the invention of claim 1 is a combine harvester in which a traveling device 2 is provided on the lower side of a body frame 1 on which an engine E is mounted, a harvesting device 3 is provided on the front side of the body frame 1, a threshing device 4 is provided on the rear left side of the harvesting device 3, an operation unit 5 is provided on the rear right side of the harvesting device 3,

it is characterized in that the preparation method is characterized in that,

the control unit 5 is provided with a shift lever 21 for accelerating and decelerating the traveling device 2, and is configured to accelerate and decelerate the output rotation speed of the engine E when the operation speed of the shift lever 21 is higher than a predetermined speed, and to not accelerate and decelerate the output rotation speed of the engine E when the operation speed of the shift lever 21 is lower than the predetermined speed.

The invention according to claim 2 is the combine harvester according to claim 1, wherein when the operating speed of the shift lever 21 is slower than a predetermined speed, the output rotation speed of the engine E is accelerated or decelerated when the operating position of the shift lever 21 is at a predetermined position, and the output rotation speed of the engine E is not accelerated or decelerated when the operating position of the shift lever 21 is not at the predetermined position.

The invention of claim 3 is the combine harvester according to claim 1, wherein the output rotation speed of the engine E is accelerated when the shift lever 21 is operated from the neutral posture to the forward posture, and the output rotation speed of the engine E is decelerated when the shift lever 21 is operated from the forward posture to the neutral posture.

The invention of claim 4 is the combine harvester according to claim 2, wherein the output rotation speed of the engine E is accelerated when the shift lever 21 is operated from the neutral posture to the forward posture, and the output rotation speed of the engine E is decelerated when the shift lever 21 is operated from the forward posture to the neutral posture.

The invention of claim 5 is the combine harvester according to claim 3, wherein the acceleration amount of the output rotation speed of the engine E is determined based on the operation amount of the shift lever 21 operated from the neutral posture to the forward posture, and the deceleration amount of the output rotation speed of the engine E is determined based on the operation amount of the shift lever 21 operated from the forward posture to the neutral posture.

The invention according to claim 6 is the combine harvester according to claim 4, wherein the acceleration amount of the output rotation speed of the engine E is determined based on the operation amount of the shift lever 21 operated from the neutral posture to the forward posture, and the deceleration amount of the output rotation speed of the engine E is determined based on the operation amount of the shift lever 21 operated from the forward posture to the neutral posture.

The invention according to claim 7 is the combine harvester according to any one of claims 1 to 6, characterized in that the reduction of the output rotation speed of the engine E is restricted when the thickness of the grain layer on the screen frame of the thresher 4 is a predetermined value or more.

The invention of claim 8 is the combine harvester according to any one of claims 1 to 6, characterized in that the reduction of the output rotation speed of the engine E is restricted when the load of the engine E is equal to or greater than a predetermined value.

The invention according to claim 9 is the combine harvester according to claim 7, characterized in that the reduction of the output rotation speed of the engine E is restricted when the load of the engine E is equal to or greater than a predetermined value.

ADVANTAGEOUS EFFECTS OF INVENTION

According to the invention described in claim 1, the shift lever 21 for accelerating and decelerating the traveling apparatus 2 is provided in the operating portion 5, and the output rotation speed of the engine E is accelerated and decelerated when the operating speed of the shift lever 21 is higher than the predetermined speed, and the output rotation speed of the engine E is not accelerated and decelerated when the operating speed of the shift lever 21 is lower than the predetermined speed, so that the traveling speed of the traveling apparatus 2 can be accelerated and decelerated quickly when the operating speed of the shift lever 21 is higher than the predetermined speed. On the other hand, when the operating speed of the shift lever 21 is slower than the predetermined speed, the acceleration/deceleration of the output revolution speed of the engine E is stopped, and the rapid acceleration/deceleration of the running speed of the running device 2 can be suppressed. Further, the shift lever 21 can be operated to accelerate or decelerate the rotational speed of the treatment cylinder in accordance with the load of the threshing device 4.

According to the invention described in claim 2, in addition to the effect of the invention described in claim 1, when the operation speed of the shift lever 21 is slower than the predetermined speed, the output rotation speed of the engine E is accelerated or decelerated when the operation position of the shift lever 21 is within the predetermined safe region, and the output rotation speed of the engine E is not accelerated or decelerated when the operation position of the shift lever 21 is not within the predetermined safe region, so that the travel speed of the travel device 2 can be accelerated or decelerated more quickly when the shift lever 21 is within the predetermined safe region, for example. On the other hand, when the shift lever 21 is not in the safe region, the acceleration/deceleration of the output rotation speed of the engine E can be stopped, and the rapid acceleration/deceleration of the running speed of the running device 2 can be reliably suppressed.

According to the invention described in claim 3 or 4, in addition to the effect of the invention described in claim 1 or 2, when the shift lever 21 is operated from the neutral posture to the forward posture, the output rotation speed of the engine E and the running speed of the running device 2 are accelerated, and when the shift lever 21 is operated from the forward posture to the neutral posture, the output rotation speed of the engine E and the running speed of the running device 2 are decelerated, so that the output rotation speed of the engine E and the running speed of the running device 2 can be easily accelerated and decelerated by operating the shift lever 21.

According to the invention described in claim 5 or 6, in addition to the effect of the invention described in claim 3 or 4, the output rotation speed of the engine E and the acceleration amount of the running speed of the running device 2 are determined based on the operation amount of the shift lever 21 operated from the neutral posture to the forward posture, and the output rotation speed of the engine E and the deceleration amount of the running speed of the running device 2 are determined based on the operation amount of the shift lever 21 operated from the forward posture to the neutral posture, so that the acceleration and deceleration of the output rotation speed of the engine E and the running speed of the running device 2 can be more easily performed by operating the shift lever 21.

According to the invention described in claim 7, in addition to the effect of the invention described in any one of claims 1 to 6, since the reduction in the output rotation speed of the engine E is restricted when the thickness of the grain layer on the screen frame of the threshing device 4 is equal to or greater than a predetermined value, the intensity of the screening wind from the air separator of the threshing device 4 can be maintained, the screening process can be efficiently performed, and the grain can be prevented from being discharged to the outside.

According to the invention described in claim 8 or 9, in addition to the effect of the invention described in any one of claims 1 to 7, since the reduction in the output rotation speed of the engine E is restricted when the load of the engine E is equal to or greater than a predetermined value, the rotation speed of the air separator of the threshing device 4 can be maintained at a predetermined speed, the intensity of the sifting air can be maintained, the sifting process can be performed more efficiently, and the grains can be further prevented from being discharged to the outside.

Drawings

Fig. 1 is a right side view of the combine harvester.

Fig. 2 is a top view of the combine.

Fig. 3 is a transmission diagram of the output rotation speed of the engine.

Fig. 4 is a connection diagram of the local controller and the engine controller.

Fig. 5 is an explanatory diagram of a method of accelerating and decelerating the output rotation speed of the engine.

Fig. 6 is an explanatory diagram of a torque curve of the engine.

In the figure:

1-machine body frame, 2-running device, 3-harvesting device, 4-threshing device, 5-operation portion, 21-main speed-changing lever (speed-changing lever) and E-engine.

Detailed Description

As shown in fig. 1 and 2, the combine harvester is provided with a traveling device 2 composed of a pair of left and right crawler belts traveling on the soil surface on the lower side of a body frame 1, a harvesting device 3 for harvesting grain stalks of a farmland on the front side of the body frame 1, a threshing device 4 for threshing and screening the harvested grain stalks on the rear left side of the harvesting device 3, and a control part 5 for a user to ride on the rear right side of the harvesting device 3.

An engine room 6 on which an engine E is mounted is provided below the operation part 5, a grain container 7 for storing grains subjected to threshing and screening processing is provided behind the operation part 5, a discharge auger 8 for discharging grains to the outside is provided behind the grain container 7, and the discharge auger 8 includes a grain lifting part 8A extending in the vertical direction and a lateral discharge part 8B extending in the front-rear direction.

A front panel 10 is provided on the front side of the operator's seat 5A of the operator's part 5, and a side panel 20 is provided on the left side.

A monitor 11 that displays the traveling speed of the traveling apparatus 2 and the like is provided at the center of the front panel 10, and a retreat switch 12 that moves the mowing apparatus 3 to a retreat posture by rising a predetermined height upward from the soil surface is provided at the rear side of the monitor 11.

A main shift lever (a "shift lever" in the embodiment) 21 is provided in a front portion of the side panel 20, and the main shift lever 21 switches the state of the traveling apparatus 2 to a forward state, a stop state, or a reverse state via a traveling hydraulic continuously variable transmission 51 provided on the downstream side of the engine E, and performs acceleration/deceleration of the output rotation speed of the engine E.

When the main shift lever 21 is set to the neutral posture, the traveling device 2 is stopped, and when the main shift lever 21 is tilted forward from the neutral posture to be set to the forward posture, the traveling device 2 moves forward, and when the main shift lever 21 is set to the reverse posture tilted backward from the neutral posture, the traveling device 2 moves backward.

When the main shift lever 21 is set to the neutral position, the output rotation speed of the engine E is not accelerated or decelerated, and when the main shift lever 21 is tilted forward from the neutral position to the forward position, the output rotation speed of the engine E is accelerated. In the present embodiment, the main shift lever 21 is tilted rearward from the neutral position to the reverse position, and the output rotation speed of the engine E is not accelerated or decelerated.

When the main shift lever 21 is tilted further forward in the forward posture, the forward speed of the running gear 2 is accelerated by the hydraulic continuously variable transmission 51, and when the main shift lever is tilted further backward in the neutral posture direction, that is, the forward speed of the running gear 2 is decelerated by the hydraulic continuously variable transmission 51. In addition, the pulling-up speed of the harvesting unit 3 is also accelerated and decelerated in accordance with the acceleration and deceleration of the traveling speed of the traveling unit 2. Accordingly, the travel speed of the travel device 2 and the pull-up speed of the harvesting device 3 can be accelerated via the hydraulic inorganic transmission 51 by operating the main shift lever 21, and the harvesting process can be efficiently performed.

In the forward posture, when the main shift lever 21 is tilted further forward, the output rotation speed of the engine E is accelerated, and when the main shift lever is tilted in the neutral posture direction, that is, rearward, the output rotation speed of the engine E is decelerated. As a result, the main shift lever 21 is operated to accelerate the output rotation speed of the engine E, and the traveling speed of the traveling device 2 and the pull-up speed of the harvesting device 3 can be rapidly accelerated via the hydraulic inorganic transmission 51. In the present embodiment, the output rotation speed of the engine E is accelerated and decelerated by operating the main shift lever 21 to change the opening degree of a throttle valve that supplies combustion air to the engine E via the local controller 30 and the engine controller 40.

In the reverse attitude, when the main shift lever 21 is tilted rearward, the reverse speed of the running gear 2 is accelerated by the hydraulic inorganic transmission 51, and when the main shift lever is tilted forward in the neutral attitude direction, that is, forward, the reverse speed of the running gear 2 is decelerated by the hydraulic inorganic transmission 51. In addition, the pulling-up speed of the harvesting unit 3 is also accelerated and decelerated in accordance with the acceleration and deceleration of the traveling speed of the traveling unit 2. Accordingly, the main shift lever 21 is operated to decelerate the traveling speed of the traveling device 2 and the pull-up speed of the harvesting device 3 via the hydraulic inorganic transmission 51, thereby efficiently performing the harvesting process.

A sub-shift lever 22 is provided on the rear right side of the main shift lever 21, and the sub-shift lever 22 performs acceleration/deceleration of the traveling speed of the traveling device 2 via a transmission 52 for traveling provided on the downstream side of the hydraulic inorganic transmission 51.

When the sub-shift lever 22 is tilted forward, the gear ratio of the gears in the transmission 52 decreases, and the traveling speed of the traveling device 2 is accelerated, and when the sub-shift lever 22 is tilted backward, the gear ratio increases, and the traveling speed of the traveling device 2 is decelerated. This allows acceleration and deceleration of the traveling speed of the traveling device 2 to be performed according to the state of lodging of the grain pole in the field. That is, when a large amount of grain stalks are fallen down, the sub-shift lever 22 is tilted rearward to maintain the pull-up speed of the mowing device 3, and the traveling speed of the traveling device 2 is decelerated, so that missing harvesting of the fallen grain stalks can be suppressed.

As shown in fig. 3, a harvesting and threshing rod 23 is provided on the rear left side of the main transmission lever 21, and the harvesting and threshing rod 23 connects and disconnects a threshing clutch 50 provided between the engine E and the threshing device 4 on the first path a and a harvesting clutch 53 provided between the hydraulic inorganic transmission 51 and the harvesting device 3 on the second path B.

When the harvesting and threshing rod 23 is tilted forward to a forward position, the harvesting clutch 53 and the threshing clutch 50 are connected, and the harvesting unit 3 and the threshing unit 4 are driven. When the harvesting threshing rod 23 is tilted from the front posture to the rear posture to the neutral posture, the connection of the harvesting clutch 53 is released, the harvesting device 3 is stopped and the threshing device 4 is driven, and when the harvesting threshing rod 23 is tilted from the neutral posture to the rear posture from the rear posture, the connection of the threshing clutch 50 is released, and the harvesting device 3 and the threshing device 4 are stopped.

Thus, when a large load is applied to the rotation of the treatment cylinder by transferring a large number of grain stalks to the threshing device 4 and the load of the engine E is large, the harvester threshing rod 23 can be set to a neutral posture, for example, to stop the driving of the harvester 3 and reduce the load applied to the engine E.

An accelerator lever 24 for accelerating and decelerating the output rotational speed of the engine E via an engine controller 40 without via the main controller 30 is provided on the right side of the main shift lever 21.

When the accelerator lever 24 is tilted forward to assume the forward position, the output rotational speed of the engine E is accelerated, and when the accelerator lever 24 is tilted rearward to assume the rearward position, the output rotational speed of the engine E is decelerated. Thus, the output rotational speed of the engine E can be accelerated and decelerated by operating the accelerator lever 24, and the rotational speed of the processing cylinder or the like of the threshing device 4 can be accelerated and decelerated, thereby efficiently performing the threshing and sorting process.

< Transmission map of output speed of Engine >

Next, the transmission of the output rotation speed of the engine E will be described. As shown in fig. 3, the output rotational speed of the engine E is transmitted to the threshing device 4 via the threshing clutch 50 provided on the first path a, and drives the processing cylinder, the swing sifter frame, and the like of the threshing device 4. Further, the harvesting threshing rod 23 is operated to switch between connection and disconnection of the threshing clutch 50.

Thus, the rotation speed of the treatment drum of the threshing device 4 can be set independently of the travel speed of the travel device 2 or the lifting speed of the harvesting device 3, and the rotation speed of the treatment drum can be adjusted according to the moisture content of the grains, thereby efficiently performing threshing and screening treatment.

The output rotation speed of the engine E is transmitted to the hydraulic inorganic transmission 51 provided on the second path B. The output rotational speed of the engine E transmitted to the input shaft of the hydraulic inorganic transmission 51 is subjected to acceleration/deceleration and a change in the rotational direction in the hydraulic inorganic transmission 51, and is output from the first output shaft and the second output shaft. Further, the main shift lever 21 is operated to perform acceleration/deceleration and change of the rotational direction in the hydraulic inorganic transmission 51.

The output rotational speed of the first output shaft of the hydraulic inorganic transmission 51 is transmitted to the transmission 52. The output rotation speed of the first output shaft transmitted to the input shaft of the transmission 52 is accelerated and decelerated by the transmission gear in the transmission 52 and is output from the output shaft.

The output rotational speed of the output shaft of the transmission 52 is transmitted to the traveling device 2, and the crawler of the traveling device 2 is rotated.

The output rotational speed of the second output shaft of the hydraulic inorganic transmission 51 is transmitted to the harvesting unit 3 via the harvesting clutch 53, and drives the pulling-up device, the cutting device, and the like of the harvesting unit 3. Further, the reaping threshing rod 23 is operated to switch between connection and disconnection of the reaping clutch 53.

Accordingly, the main transmission lever 21 is operated to accelerate or decelerate the traveling speed of the traveling device 2 and the pull-up speed of the harvesting device 3 via the hydraulic inorganic transmission 51 in accordance with the state of lodging of the grain pole in the field, and harvesting processing can be efficiently performed. Further, the main shift lever 21 can be operated to easily accelerate or decelerate the output rotation speed of the engine E.

< local controller and Engine controller >

Next, the local controller 30 and the engine controller 40 will be explained. As shown in fig. 4, the local controller 30 and the engine controller 40 are connected by a radio circuit 31. The local controller 30 includes an arithmetic unit 30A, a memory unit 30B, and a timer unit, the arithmetic unit 30A controls the engine E based on an input value of an angle sensor 32 for measuring the inclination angle of the main shift lever 21, the memory unit 30B stores arithmetic data and the like, and the timer unit 30C measures processing time and the like.

On one side of the local controller 30, there are connected via predetermined interface circuits: an angle sensor 32 for measuring the inclination angle of the main shift lever 21; a layer thickness sensor 33 for measuring the layer thickness of grains falling on the screen frame of the threshing device 4; an avoidance sensor 34 that detects an avoidance posture of the harvesting device 3 from above the soil surface; and a speed sensor 35 for measuring the rotation speed of the crawler track roller of the traveling device 2.

Further, on the other side of the local controller 30, there are connected via predetermined interface circuits: a harvest sensor 36 for detecting the forward position of the harvest threshing bar 23; an angle sensor 38 for measuring the inclination angle of the sub-shift lever 22; and a monitor 11 that displays the traveling speed of the traveling device 2 and the like.

An angle sensor 41 for measuring the inclination angle of the accelerator lever 24 is connected to one side of the engine controller 40, and the other side of the engine controller 40 is connected to: a rotation speed sensor 42 for measuring an output rotation speed of an output shaft of the engine E; a throttle valve 43 that supplies combustion air into a cylinder of the engine E; and a load sensor 44 for measuring a load applied to the engine E by measuring a temperature in a cylinder of the engine E.

< method for accelerating/decelerating output speed of engine >

Next, a method of accelerating or decelerating the output rotation speed of the engine E will be described. As shown in fig. 5, in step S1, the local controller 30 determines an input signal from the harvest sensor 36 that detects the front position of the harvest threshing rod 23, and proceeds to step S2 when the input signal of the harvest sensor 36 is on because the harvest threshing rod 23 is in the front position, and repeatedly executes step S1 when the input signal of the harvest sensor 36 is off because the harvest threshing rod 23 is not in the front position. When the threshing rod 23 is in the forward position, the threshing clutch 50 and the harvesting clutch 53 can be connected, and the harvesting unit 3 and the threshing unit 4 can be driven to perform threshing and harvesting processes.

In step S2, the local controller 30 determines the operating speed of the main shift lever 21 by the operator, and if the operating speed of the main shift lever 21 is determined to be slower than the preset operating speed, the process proceeds to step S3, and if the operating speed of the main shift lever 21 is determined to be faster than the preset operating speed, the process proceeds to step S4.

The operating speed of the main shift lever 21 is calculated by dividing the inclination angle of the main shift lever 21 measured by the angle sensor 41 per unit time by the unit time. The set operation speed is stored in the memory unit 30B of the local controller 30.

In step S3, the local controller 30 determines the operation position of the main shift lever 21 by the operator, and if it determines that the operation position of the main shift lever 21 is in a predetermined range, for example, as shown in fig. 6, the operation position of the main shift lever 21 is in a predetermined safe range, the process proceeds to step S4, and if it determines that the operation position of the main shift lever 21 is not in the predetermined safe range, the process returns to step S2.

Thus, when the main shift lever 21 is located between the neutral posture and the lower limit region of the safe region, the output rotation speed of the engine E stops acceleration and deceleration, and rapid acceleration and rapid deceleration of the running speed of the running device 2 and the like can be prevented. On the other hand, when the main shift lever 21 is located in the safe region, the output rotation speed of the engine E can be accelerated and decelerated, and the running speed of the running device 2 and the like can be rapidly accelerated and decelerated.

The operation position of the main shift lever 21 is measured by the angle sensor 41. The safety region is stored in the memory unit 30B of the local controller 30, and in the present embodiment, when the inclination angle at which the main shift lever 21 is inclined from the neutral posture to the most advanced posture is 100, the safety region is a region in which the main shift lever 21 is inclined from the neutral posture to the most advanced posture by 25 to 100%.

Assuming that the rated output rotation speed at which the output torque of the engine E is the maximum is 100, the output rotation speed of the engine E is 50 when the main shift lever 21 is set to the neutral position. When the main shift lever 21 is tilted from the safe region to the neutral position, the output rotation speed of the engine E is set to 50 by the local controller 30 described later after a predetermined set time has elapsed. The set time is stored in the memory unit 30B of the local controller 30, and the elapsed time is measured by the timer unit 30C. In the present embodiment, the set time is set to 10 seconds. This prevents the reduction of the output rotation speed of the engine E to weaken the sifting air from the air separator in the thresher 4, thereby mixing grains with the discharged straw and discharging the mixture to the outside. In the embodiment, the output rotation speed of the engine E is also set to 50 in the manual operation.

When the main shift lever 21 is tilted by 25%, the output rotation speed of the engine E is 70%, when the main shift lever 21 is tilted by 75%, the output rotation speed of the engine E is 100 and the output torque is maximum, and when the main shift lever 21 is tilted by 100% to the most advanced position, the output rotation speed of the engine E is 110 and the output torque is reduced.

In step S4, the local controller 30 determines the operation direction of the main shift lever 21 by the operator, and proceeds to step S5 when determining that the operation direction of the main shift lever 21 is operated from the forward attitude to the neutral attitude, and proceeds to step S11 when determining that the operation direction of the main shift lever 21 is operated from the neutral attitude to the forward attitude.

This allows the main shift lever 21 to be operated to accelerate or decelerate the output rotation speed of the engine E, to accelerate or decelerate the travel speed of the traveling device 2, and the like, and to accelerate or decelerate the rotation speed of the processing cylinder of the threshing device 4, and the like, thereby efficiently performing the threshing and sorting process.

The operating direction of the main shift lever 21 is calculated by dividing the inclination angle of the main shift lever 21 measured by the angle sensor 41 per unit time by the unit time. When the main shift lever 21 is operated from the forward posture to the neutral posture, the inclination angle of the main shift lever 21 measured by the angle sensor 41 is negative, and when the main shift lever 21 is operated from the neutral posture to the forward posture, the inclination angle of the main shift lever 21 measured by the angle sensor 41 is positive.

In step S5, the local controller 30 determines that the input signal from the layer thickness sensor 33 that measures the layer thickness of the grain dropped onto the grain strainer of the threshing device 4 is smaller than the preset layer thickness, and if the layer thickness measured by the layer thickness sensor 33 is determined to be smaller than the preset layer thickness, the process proceeds to step S6, and if the layer thickness measured by the layer thickness sensor 33 is determined to be larger than the preset layer thickness, the process repeats step S5. The set layer thickness is stored in the memory unit 30B of the local controller 30.

This can maintain the intensity of the sifting air from the air classifier of the threshing device 4, effectively perform sifting processing, and prevent grains from being discharged to the outside.

In step S6, the local controller 30 determines that the input signal from the load sensor 44 that measures the load applied to the engine E due to driving of the threshing device 4 or the like is input, and if it determines that the load of the engine E measured by the load sensor 44 is smaller than the preset set load, the process proceeds to step S7, and if it determines that the load of the engine E measured by the load sensor 44 is larger than the preset set load, the process repeats step S6. The set load is stored in the memory unit 30B of the local controller 30.

This prevents the rotation speed of the air separator of the threshing device 4 from varying, maintains the intensity of the screening wind, performs the screening process more efficiently, and prevents grains from being discharged to the outside.

In step S7, the local controller 30 determines an input signal from the speed sensor 35 that measures the rotation speed of the crawler track roller of the running device 2, and if it determines that the rotation speed of the rotating shaft of the running device measured by the speed sensor 35 is equal to the output rotation speed of the engine E measured by the rotation speed sensor 42 that measures the output rotation speed of the engine E, the routine proceeds to step S8, and if the rotation speed of the rotating shaft of the running device measured by the speed sensor 35 is slower than the output rotation speed of the engine E measured by the rotation speed sensor 42 that measures the output rotation speed of the engine E, the routine proceeds to step S11.

This prevents deceleration of the traveling speed of the traveling device 2 during wet traveling or the like, synchronizes the traveling speed of the traveling device 2 with the pulling-up speed of the harvesting device 3, and efficiently performs harvesting processing of the cereal stalks.

In step S8, the local controller 30 determines an input signal from the avoidance sensor 34 that detects the avoidance position of the harvesting device 3, and proceeds to step S9 when the harvesting device 3 is not in the avoidance position and the input signal of the avoidance sensor 34 is OFF, and proceeds to step S10 when the harvesting device 3 is in the avoidance position and the input signal of the avoidance sensor 34 is ON.

Thus, when the combine is in the avoidance posture of the reaping apparatus 3 such as when turning around, the output rotation speed of the engine E is decelerated at a constant speed, and the screened air from the air separator of the threshing apparatus 4 is prevented from being weakened, so that grains are mixed with the discharged straw and discharged to the outside.

In step S9, the local controller 30 transmits the operation amount of the main shift lever 21 from the forward position to the neutral position to the engine controller 40 via the wireless circuit 31, and the engine controller 40 decreases the opening degree of the throttle valve 43 in accordance with the input operation amount, decreases the amount of combustion air supplied from the throttle valve 43 to the cylinder of the engine E, decelerates the output rotation speed of the engine E, and returns to step S1.

Preferably, the local controller 30 transmits the operation amount to the engine controller 40 after a predetermined first set time has elapsed. This enables the output rotation speed of the engine E to be stably reduced. The first set time is stored in the memory unit 30B of the local controller 30, and the elapsed time is measured by the timer unit 30C. In the present embodiment, the first setting time is set to 2 seconds.

In step S10, the local controller 30 transmits a preset operation amount to the engine controller 40 via the radio circuit 31, and the engine controller 40 reduces the opening degree of the throttle valve 43 in accordance with the input operation amount, reduces the amount of combustion air supplied from the throttle valve 43 to the cylinder of the engine E, decelerates the output rotation speed of the engine E at a constant speed, and returns to step S1. The set operation amount is stored in the memory unit 30B of the local controller 30.

Preferably, the local controller 30 transmits the set operation amount to the engine controller 40 after a predetermined second set time has elapsed. This enables the output rotation speed of the engine E to be stably reduced. The second set time is stored in the memory unit 30B of the local controller 30, and the elapsed time is measured by the timer unit 30C. In the present embodiment, the second setting time is set to 3 seconds.

In step S11, the local controller 30 transmits the operation amount of the main shift lever 21 from the neutral position to the forward position to the engine controller 40 via the radio circuit 31, and the engine controller 40 increases the opening degree of the throttle valve 43 in accordance with the input operation amount, increases the amount of combustion air supplied from the throttle valve 43 to the cylinder of the engine E, accelerates the output rotation speed of the engine E, and returns to step S1.

Preferably, the local controller 30 transmits the operation amount to the engine controller 40 after a predetermined third set time has elapsed. This makes it possible to stably accelerate the output rotation speed of the engine E. The third set time is stored in the memory unit 30B of the local controller 30, and the elapsed time is measured by the timer unit 30C. The third setting time is preferably set to a time shorter than the first setting time, and in the present embodiment, the third setting time is set to 1 second.