JP2003146236A - Turning control device for combine or others - Google Patents

Abstract

PROBLEM TO BE SOLVED: To solve the problem on a conventional combine which performs mild and continuous turning in each of turning modes during reaping work that it may be out of a reaping line to cause troubles in work because of its steering control being difficult of prompt action during straight movement. SOLUTION: This turning control device for a combine which performs turning operation in linkage with the tilting operation of a power steering lever 1 to the right and left sides comprises a position sensor 3 and right and left sensor switches 4 provided at proper positions on the power steering lever 1 for detecting the tilting control input of the lever 1 and outputting variable braking force to a travel driving wheel 2 on an turning inside and for outputting constant braking force to the travel driving wheel 2 on the turning inside when turned on by the preset-angle tilting operation of the lever 1, respectively. The switches 4 and the sensor 3 are used during reaping work and during non- reaping work, respectively. Selecting means 5 is provided on the lever 1 or its vicinity for selecting the sensor 3 or the switches 4.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a turning control device such as a combine and the like, which performs a turning action in conjunction with a tilting operation of a power steering lever to the left and right sides. This belongs to the field such as one provided with two types of sensors that respectively output a variable or constant braking force to the traveling drive wheels.

[0002]

2. Description of the Related Art In operations such as combine in a field, when performing steering control for performing a left-right steering action or a turning action of a vehicle body by a tilting operation of a power steering lever to the left or right side during forward or reverse movement, conventionally, In this steering control, a sensor switch such as a limit switch is turned on by tilting the power steering lever at a predetermined angle to turn on the steering clutch and output a constant braking force to the traveling drive wheels inside the turn. In general, the brake turning mode is used.

However, in this brake turning mode, steering control can be performed with good performance in the left-right steering action when the vehicle is traveling straight, but when performing the turning action, particularly in the case of a weak field, There was a problem that turning was insufficient and the soil surface was often damaged, which hinders the work from the next time.

For this reason, in recent years, the tilt operation amount of the power steering lever is detected by a position sensor such as a potentiometer, and the steering clutch is disengaged for the traveling drive wheel on the inside of the turning, and at the same time, the differential gear mechanism and the planetary gear mechanism are used. There is disclosed a differential device such as that for performing a continuous continuous swing action in each swing mode that outputs a variable braking force such as a mild swing, a brake swing, and a spin swing.

[0005]

However, at the time of turning action in such a combine or the like, the position sensor provided in the power steering lever detects the tilting operation amount of the lever and the variable control is performed with respect to the drive wheel inside the turning. A device that outputs power has the effect of being able to obtain sufficient turning performance due to the mild operation feeling during turning action and less damage to the soil surface, but when straightening during mowing work, the lever The output of the braking force rises slowly with respect to the amount of tilting operation, it is difficult to swiftly control the steering by the left-right steering action, and there is a problem that work is hindered due to slipping from the cutting strip.

For this reason, the occurrence of defects in the operation of these power steering levers is improved.

[0007]

According to the invention of claim 1, in a combine or the like which performs a turning action in conjunction with a tilting operation of the power steering lever 1 to the left and right sides, the lever 1 is placed at an appropriate position of the power steering lever 1. The position sensor 3 that detects the amount of tilting operation by the vehicle and outputs a variable braking force to the traveling drive wheels 2 on the inside of the turn, and the traveling drive wheels 2 on the inside of the turn when turned on by the tilting operation of the lever 1 at a predetermined angle. A turning control device is characterized in that each of them is provided with a sensor switch 4 for outputting a constant braking force.

With such a structure, the amount of tilting operation of the power steering lever 1 arranged on one side of the operating seat to the left and right sides at the time of operation such as combine is provided, for example, on the rotation supporting shaft portion of the lever 1. Detected by the position sensor 3 such as a potentiometer, a variable braking force is output to the traveling drive wheels 2 on the inside of the turn according to the detected value, and continuously variable in various turning modes such as mild turning, brake turning, and spin turning. By the variable braking force for executing the turning action and the tilting operation of the lever 1 at a predetermined angle, for example, the sensor switch 4 is turned on by a limit switch or the like provided at symmetrical positions on the left and right sides in the vicinity of the rotation supporting shaft of the lever 1. At this time, a constant braking force is output to the traveling drive wheels 2 on the inside of the turn, and a sudden rise in the brake turn mode causes a left-right steering action or the like during straight running. That two kinds of braking force by the constant braking force to perform the work by switching appropriately.

According to a second aspect of the present invention, in a combine or the like that performs a turning action in conjunction with tilting operation of the power steering lever 1 to the left and right sides, the tilting operation amount by the lever 1 is detected at an appropriate position of the power steering lever 1. The position sensor 3 outputs a variable braking force to the traveling drive wheel 2 on the inside of the turn, and the lever 1 turns on by tilting the lever 1 at a predetermined angle.
And a sensor switch 4 for outputting a constant braking force to the traveling drive wheels 2 on the inside of the turn,
The sensor control switch 4 is used during mowing work, and the position sensor 3 is used during non-mowing work.

With such a structure, the power steering lever 1 arranged on one side of the operator's seat is provided during the harvesting work by engaging the threshing clutch and turning on the front of the grain culm sensor located in the front part of the harvesting device during the work such as combine harvester. When a sensor switch 4 such as a limit switch provided at a symmetrical position on the left and right sides in the vicinity of the rotation support shaft portion of the lever 1 is turned on by a tilting operation to the left and right sides of the vehicle, the traveling drive wheels on the inside of the turn are driven. A constant braking force is output to 2 and a sudden rise in the brake turning mode causes a left-right steering action when going straight, and at the time of non-mowing work in which the threshing clutch is engaged and the front of the grain culm sensor is OFF. The amount of tilting operation of the lever 1 is detected by the position sensor 3 such as a potentiometer provided on the rotation support shaft portion of the lever 1, and the detected value is detected. To output a variable braking force to driven road wheels 2 of the corresponding pivot inwardly, mild swirl, brake pivot, to perform the continuous turning action of the continuously variable by each turning mode such as spin turning.

According to a third aspect of the present invention, in a combine or the like that performs a turning action in conjunction with a tilting operation of the power steering lever 1 to the left and right sides, the tilting operation amount by the lever 1 is detected at an appropriate position of the power steering lever 1. The position sensor 3 outputs a variable braking force to the traveling drive wheel 2 on the inside of the turn, and the lever 1 turns on by tilting the lever 1 at a predetermined angle.
And a sensor switch 4 for outputting a constant braking force to the traveling drive wheels 2 on the inside of the turn,
The turning control device according to claim 1, wherein a selection means (5) for selecting the position sensor (3) and the sensor switch (4) is provided at the lever (1) or a position in the vicinity thereof.

With such a structure, the amount of tilting operation of the power steering lever 1 arranged on one side of the operation seat to the left and right sides is detected during work such as combine operation, and the traveling drive wheels on the inside of the turn are detected according to the detected value. A variable braking force is output to 2 to perform a continuous swing action in each swing mode such as a mild swing, a brake swing, a spin swing, and the like. For example, a potentiometer provided on the rotation support shaft portion of the lever 1. When the lever 1 is turned on by the operation of the position sensor 3 and the lever 1 is tilted by a predetermined angle, a constant braking force is output to the traveling drive wheels 2 on the inside of the turn, and a rapid rise in the brake turn mode is performed. , A sensor switch 4 for executing a left-right steering operation or the like when traveling straight ahead, for example, a limit switch or the like provided at symmetrical positions on the left and right sides in the vicinity of the rotation supporting shaft of the lever 1. A working, suitably switched by the selection means 5 by the changeover switch or the like provided at an appropriate position or near the position of the lever 1 of the lever 1, to output the variable braking force or a constant braking force.

[0013]

According to the invention of claim 1, as described above,
When the amount of tilting operation of the power steering lever 1 to the left and right is detected by the position sensor 3 during work such as combine operation, a variable braking force is output to the traveling drive wheels 2 on the inside of the turn according to the detected value, and each turning mode is selected. When the sensor switch 4 is turned on by a tilting operation of the lever 1 at a predetermined angle, a constant braking force is output to the traveling drive wheels 2 on the inside of the brake to brake the brake. The sensor switch 4 outputs a constant braking force so that the left and right steering can be performed by appropriately switching between two types of braking outputs depending on the mode, such as a braking output for performing a left-right steering operation during straight traveling. Since the steering action and the like are performed, it is possible to steer quickly, and it is possible to prevent inadvertent sharp turns, and the position sensor 3 outputs a variable braking force. With resulting mild operation feeling for the continuous turning action is, damage to the soil surface can also be reduced by improving the turning performance.

According to the second aspect of the present invention, when the tilting operation amount of the power steering lever 1 is detected by the position sensor 3 during the work such as combine and the non-mowing work as described above, the turning inner side is determined according to the detected value. A variable braking force is output to the traveling drive wheels 2 to execute a continuous continuous turning action in each turning mode, and at the time of mowing work, the sensor switch 4 is tilted to the left and right by a predetermined angle. When is turned on, a constant braking force is output to the traveling drive wheels 2 on the inside of the turn, and the left and right steering operation when straight ahead is executed by the brake turn mode.
As the predetermined angle of the lever, for example, the sensor switch 4 is turned on by a small tilting operation, and a constant braking force is quickly output to enable quick steering control when going straight, thus preventing stripping from the cutting strip. In addition, it is possible to prevent an accidental sudden turn.

According to the third aspect of the present invention, as described above, the traveling drive wheel 2 on the inside of the turn is determined in accordance with the detected value of the tilt operation amount of the power steering lever 1 to the left and right at the time of work such as combine operation.
In response to the action of the position sensor 3 that outputs a variable braking force to the stepless continuous turn action in each turn mode and the tilting operation of the lever 1 at a predetermined angle is turned on,
The selection means 5 for selectively switching between the action of the sensor switch 4 for outputting a constant braking force to the traveling drive wheels 2 on the inside of the turn and executing the left-right steering action when going straight in the brake turn mode of the lever 1. By providing it at an appropriate position or a position in the vicinity thereof, the operator can easily perform the selection switching between the variable braking force by the position sensor 3 and the constant braking force by the sensor switch 4 by operating the selecting means 5.

[0016]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described below with reference to the drawings. FIG. 14 shows the overall structure of the combine. A traveling device 8 in which a pair of left and right traveling crawlers 7 traveling on a soil surface is stretched is provided on the lower side of the chassis 6, and a feed chain is provided on the chassis 6. A grain tank 10 for selectively collecting and temporarily storing grains obtained by threshing culms that are sandwiched between 9 and transported, and a grain auger 11 for discharging the grains stored in the tank 10 to the outside of the machine. The threshing device 12 provided is placed and disposed, and the straw treating device 13 is mounted on the rear end of the threshing device 12.

In front of the threshing device 12, a grass body 14 for weeding uncut grain culms from the front end side, a raising section 15 for causing the culled grain culms, and a cutting blade section 1 for cutting the caused grain culms.
6 and a mowing device 18 having a feed adjusting and conveying part 17 and the like for scraping the cut grain culm and adjusting the handling depth during the conveyance and taking over to the feed chain 9, Suspendedly arranged at the front end of the chassis 6 so that it can be raised and lowered with respect to the soil surface, and left and right grain culm sensor fronts 20 for detecting the presence or absence of a transported grain culm are arranged on the left and right sides of the front part of the reaping device 18. Let me configure.

An operating device 21 for controlling the operation of the combine and an operating seat 22 for operation are provided on one side of the reaping device 18, an engine 23 is mounted on the lower side of the operating seat 22, and the engine seat 23 is installed on the rear side. While arranging the Glen tank 10,
A cabin 24 that covers the operating device 21 and the operating seat 22 is provided, and these traveling device 8, threshing device 12, harvesting device 18,
The operating device 21, the engine 23, the cabin 24, etc. constitute a combine vehicle body 25.

In the operator's seat 22, a main shift lever 26 for switching forward / backward movement and main transmission of the vehicle body 25 by a forward / backward operation by an operator, and a left / right steering operation during straight traveling by a tilting operation to the left and right. A power steering lever 1 that performs a turning action in various turning modes, and a threshing clutch 27 that turns threshing action of a threshing device 12 by forward and backward operations.
(Clutch switch for on / off detection) and operating device 2 respectively
1 is arranged on one side to be configured.

The traveling device 8 has a traveling mission case 28 mounted on the front side of the chassis 6, and as a transmission mechanism of the mission case 28, as shown in FIGS.
Variable pump 2 of the hydraulic continuously variable transmission from the engine 23
9, a transmission belt is stretched so as to be able to drive an input pulley 30 that is axially fixed, and a hydraulic motor 31 that is integrally driven by the variable pump 29 is connected to an input shaft 32 as a first shaft.
The input gear 33 is caused to rotate on the input shaft 32 so as to be configured.

The input gear 33 is meshed with a speed change transmission gear 35 that rotates about a speed change drive shaft 34 as a second shaft, and a high speed gear 36 and a low speed gear 37 that rotate about the speed change drive shaft 34. On the other hand, the high-speed drive gear 38 and the low-speed drive gear 39, which are always meshed with each other, are configured to rotate about the speed change transmission shaft 40 as the third shaft.

Similarly, a medium speed gear 41 axially slid on the speed change drive shaft 34 by a spline or the like is meshed with a medium speed drive gear 42 axially rotated on the speed change transmission shaft 40 by switching a shifter (not shown). By further engaging the clutch pawls with the low speed drive gear 39 and the high speed drive gear 38 located on the left and right sides respectively, the sub transmission unit SD for shifting the speed to the high speed, the medium speed and the low speed is configured.

A medium speed drive gear 42 of the speed change transmission shaft 40,
The center of a steering clutch shaft 43 as a fourth shaft is meshed with a steering center gear 44 that rotates, and left and right steering gears 45 are idled on both sides of the steering center gear 44. When the tilting operation of No. 1 is performed, the left and right steering clutches 46 are controlled to be in a connected state and a disengaged state by the hydraulic friction multiple plates 46a and the compression springs 46b, and the steering clutch 46 is connected when the vehicle body 25 goes straight. The steering gear 45 is configured to be axially rotated.

Steering center gear 4 of the steering clutch shaft 43
4 and a differential center gear 48 that rotates about a differential clutch shaft 47 serving as a fifth shaft are meshed with each other, and a planetary gear mechanism P having a left-right symmetry is provided on both sides of the differential center gear 48.
Arrange and configure G. 49 is the differential clutch shaft 4
7 shows a parking brake arranged at one end of 7.

As shown in FIGS. 10 and 11, the planetary gear mechanism PG is axially connected to the steering gear 45 of the steering clutch shaft 43 and the differential clutch shaft 47 as shown in FIG. The short-cylindrical carrier 50 that rolls is meshed with the outer peripheral gear 50a, and the carrier 50
On the inner peripheral surface side of the gears 51a and 51b having different outer diameters.
The two planetary gears 51 and the other planetary gears 52 are composed of the support shaft 51c and the support shaft 52a fixed to the carrier 50, which are alternately arranged so as to rotate to three shafts.

Left and right sun gears 53 are axially arranged at both ends of the differential clutch shaft 47, and the sun gears 53 and the gears 51a of the respective two-planet planetary gears 51 are meshed with each other to form the respective two-planetary planetary gears. 51 gear 51b and each planet gear 52
Are engaged with each other, and the planetary gears 52 and the output small diameter gear 54a of the dual output gear 54 that idles around the differential clutch shaft 47 are engaged with each other.

It should be noted that, in FIG. 12, the gear 51 of each of the two planetary gears 51 is drawn from the opening formed in the outer peripheral surface of the carrier 50.
a and a part of each planetary gear 52 are projected, and FIG. 13 shows another double planetary gear 51, when the output small diameter gear 54a of the dual output gear 54 of the carrier 50 rotates in the reverse direction. The rotation directions of the planet gears 52 and the sun gear 53 are indicated by arrows.

At one end of the carrier 50, a traveling brake 55, which is a hydraulic multi-plate, is controllably connected between a braking state and a non-braking state, and the dual output gear 54 is connected.
The left and right sides of the output large-diameter gear 54b and the intermediate large-diameter gears 57a of the left and right double-running intermediate gears 57 that idle around the traveling intermediate shaft 56 as the sixth shaft are meshed with each other.

The intermediate small-diameter gear 57b of the left and right double-run intermediate gears 57 and the left and right large-diameter reduction gears 59 that rotate around the respective ends of the left and right traveling reduction shafts 58 as the seventh shaft are meshed with each other. At the same time, the left and right small reduction gears 60 that rotate about the other end of the traveling reduction shaft 58 and the left and right axle gears 62 that rotate about the one end of the left and right axles 61 as the eighth shaft are meshed with each other. Then, the left and right traveling drive wheels 2 for driving the traveling crawler 7 are axially arranged at the other ends of the left and right axles 61, respectively.

As shown in FIG. 1, the power steering lever 1 is provided with a position sensor 3 such as a potentiometer for detecting a tilting operation amount of the lever 1 to the left and right sides on a rotation supporting shaft portion 1a. Sensor switches 4 such as limit switches that are turned on by the operating plate 1b by tilting the angle are arranged at symmetrical positions on the left and right in the vicinity of the rotation support shaft portion 1a, and the position sensor 3 is provided on the handle portion 1c of the lever 1. The selecting means 5 such as a changeover switch for manually changing the operation of the sensor switch 4 is attached and configured.

As shown in FIG. 2, a controller 63 is mainly provided to control the arithmetic operation of an automatic circuit, and the position sensor 3, left and right sensor switches 4, and selecting means are provided on the input side of the controller 63. 5, a steering proportional solenoid valve 64 for connecting and disconnecting the grain culm sensor front 20 and the threshing clutch 27 (clutch switch), respectively, and for connecting and disconnecting the left and right steering clutches 46 to and from the output side thereof,
The left and right traveling brakes 55 are connected to a traveling proportional solenoid valve 65 for turning on / off the braking.

Power from the engine 23 is input to the variable pump 29 of the hydraulic continuously variable transmission, and this variable pump 29
The main shift power by the hydraulic motor 31 driven by the input gear is input and interlocked with the input shaft 32, and the input gear 3 of the input shaft 32
3 to the speed change transmission gear 35 of the speed change drive shaft 34.

By this interlocking, the middle speed gear 41 of the speed change drive shaft 34 is slid to the left and right to be separately connected to the low speed gear 37 and the high speed gear 36, and the high speed drive gear 38, the low speed drive gear 39, and the middle speed drive gear 40 of the speed change transmission shaft 40, respectively. Auxiliary shift drive is performed in conjunction with the high speed drive gear 42, and this auxiliary shift power is transmitted from the medium speed drive gear 42 to the steering center gear 44 of the steering clutch shaft 43.
Interlock with.

When the vehicle body 25 is moved straight, the left and right steering clutches 46 are connected to drive the left and right steering gears 45, and the steering gears 45 are interlocked with the carriers 50 of the left and right planetary gear mechanisms PG. Steering center gear 4 at the same time
The differential clutch shaft 47 and the sun gear 53 are driven by interlocking with the differential center gear 48 from No. 4.

At this time, since the differential center gear 48 and the carrier 50 are set to the same number of revolutions, the positions of the sun gear 53 and the carrier 50 and their two planetary gears 51 and planetary gears 52 do not change and the left and right two gears are left and right. The continuous output gear 54 is driven, and the output large diameter gear 54b of the double output gear 54 is interlocked with the intermediate large diameter gear 57a of the left and right double running intermediate gears 57.

From the intermediate small diameter gear 57b of the left and right two-run traveling intermediate gear 57, the reduction small diameter gear 60 is driven via the reduction large diameter gear 59 of the left and right traveling reduction shafts 58, and the left and right axles 61 from this reduction small diameter gear 60. Interlocking with the axle gear 62 of
The left and right traveling drive wheels 2 are rotationally driven in the same direction at the same speed through the axle gears 62, and the left and right traveling crawlers 7 are driven to perform straight traveling.

Next, when turning the vehicle body 25, as shown in FIG.
As shown in the flowchart of FIG. 2, when the work is running, the threshing clutch 27 is engaged, and the left or right grain culm sensor front 20 of the reaping device 18 is ON. During the reaping work, the power steering lever 1 is moved to the left (or right) side. The left (or right) sensor switch 4 is turned on by the tilting operation of a predetermined angle.

When the sensor switch 4 is turned on, the left (or right) steering clutch 46 is disengaged by the action of the steering proportional solenoid valve 64, and at the same time, as shown by a dotted line in the diagram of FIG. , Left (or right) traveling brake 55
On the other hand, by rapidly raising the constant braking pressure to the maximum value by the action of the traveling proportional solenoid valve 65, the left (or right) sun gear 53 and the carrier 50 and their two planetary gears 51 and 52 are connected. 2 depending on the gear reduction ratio
The rotation speed of the continuous output gear 54 is reduced.

Due to the reduction of the rotation speed, as shown in the diagram of FIG. 5, the dual output gear 54 is set according to the gear ratio between the rotation speed of the left (or right) carrier 50 and the rotation speed of the sun gear 53.
Since the number of rotations becomes zero, the traveling drive wheels 2 on the inside of the turn stop rotating, and a constant braking force is quickly output by this brake turning mode to quickly move by the left-right steering action during straight running. The steering control can be performed, the stripping from the cutting strip can be prevented, and the careless sudden turning can be prevented. Further, during the work traveling, the threshing clutch 27 is disengaged, or the left or right cutting device 18 is cut. The position sensor 3 detects the tilting operation amount of the power steering lever 1 to the left (or right) side during non-mowing work in which the grain culm sensor front 20 is OFF.

From the detection value of this position sensor 3,
The left (or right) steering clutch 46 is the steering proportional solenoid valve 64.
At the same time that the disconnection state is turned off by the action of, the braking pressure according to the operation amount of the lever 1 is proportional to the travel of the left (or right) travel brake 55 as shown by the solid line in the diagram of FIG. By starting up by the action of the solenoid valve 65, the rotation speed of the dual output gear 54 is reduced by the gear reduction ratio of the left (or right) sun gear 53 and the carrier 50 and their dual planet gears 51 and 52. To do.

This deceleration of the rotation speed causes the rotation of the dual output gear 54 depending on the gear ratio between the rotation speed of the left (or right) carrier 50 and the rotation speed of the sun gear 53 as shown in the diagram of FIG. By gradually decelerating the number, it goes through the mild turning mode to the brake turning mode,
Since the traveling drive wheel 2 on the inside of the turn has a continuous turning action that reaches a spin turning mode in which the running drive wheel 2 rotates in the opposite direction to the outside, a mild operation feeling can be obtained and the turning performance improves the soil surface. The damage can also be reduced.

Further, as described above, the operation of outputting a constant braking force by turning on the sensor switch 4 by the tilting operation of the power steering lever 1 at a predetermined angle during the cutting operation, and the tilting operation amount of the lever 1 during the non-cutting operation. The operation of outputting a variable braking force according to the detected value of the position sensor 3 according to the above is performed as the selection means 5 provided in the handle portion 1c of the lever 1 in addition to the automatic selection switching by the controller 63. With a switch or the like, the operator can easily switch the selection manually.

Further, as described above, when the position sensor 3 detects the tilting operation amount of the power steering lever 1 to the left and right sides, the traveling drive wheel 2 on the inside of the turning is detected according to the detected value.
In the one having a function of varying the braking force of, the threshing clutch 27 is engaged and the left or right grain culm sensor front 20
Is turned on, during output control, output control is applied to the traveling drive wheels 2 on the inside of the turning to provide a constant braking force regardless of the amount of tilting operation of the lever 1, so that the output during turning can be adjusted depending on the cutting operation conditions. By switching the method, it is possible to improve agility during work.

Further, as described above, when the amount of tilting operation of the power steering lever 1 to the left and right is detected by the position sensor 3, the traveling drive wheel 2 on the inside of the turn is detected according to the detected value.
Which has a function of varying the braking force of the cutting height sensor 66 for detecting the rising or falling position of the cutting device 18.
Is provided on the rotating shaft portion, the threshing clutch 27 is engaged, and the left or right grain culm sensor front 20 is OFF during non-mowing work, a rise of the reaping device 18 above a predetermined level is detected. At this time, output control is performed so that the traveling drive wheel 2 on the inside of the turn is given a variable braking force according to the tilting operation amount of the lever 1.

By performing such an output control, it is possible to operate more swiftly when changing the direction or adjusting the line at the time of working, and at the time of mowing, the operation can be performed mildly within a range where the agility can be maintained. It can be carried out. Further, as described above, when the position sensor 3 detects the tilting operation amount of the power steering lever 1 to the left and right sides, it has a function of varying the braking force of the traveling drive wheel 2 on the inside of the turn according to the detected value. As shown in the diagram of FIG. 6, when the threshing clutch 27 is engaged and the grain culm sensor front 20 is OFF, the braking force of the traveling drive wheel 2 on the inside of the turn is output with a strong output amount during non-mowing work. During the mowing work in which the threshing clutch 27 is engaged and the grain culm sensor front 20 is turned ON, the switching control is performed to set the braking force of the traveling drive wheels 2 on the inside of the turn to a constant value with a weak output amount. Let

By carrying out such an output control, it is possible to operate more swiftly while changing the direction or adjusting the line at the time of work, and at the time of cutting, operate a little mildly within a range where agility can be maintained. It can be carried out. Further, as described above, when the position sensor 3 detects the tilting operation amount of the power steering lever 1 to the left and right sides, it has a function of varying the braking force of the traveling drive wheel 2 on the inside of the turn according to the detected value. In this case, as shown in the diagram of FIG. 7, the turning output at the time of reaping work in which the threshing clutch 27 is engaged and the grain culm sensor front 20 is turned on, a certain amount of output is provided when the lever 1 is tilted. The output control is performed while maintaining and attenuating the output amount proportionally over a certain period of time after the end of the tilting operation, so that the operation can be performed with a mild feeling while maintaining agility during cutting.

Further, in the turning action at the time of combine operation, the operation of the grain auger 11 of the grain tank 10 in the threshing device 12 is performed by the storing operation of the auger 11 as shown in the flowchart of FIG. When the storage is stopped, the power steering lever 1 is tilted and swung by checking the storage position.

However, when the accommodating position of the auger 11 is not confirmed or when the lever 1 is not operated, as shown in FIG. 16, the horn 67 is blown by the detection of the operating position sensor 67a provided on the auger 11. The lever 1 in the neutral position
When is operated again, the swivel action is performed, and when not operated, it is stopped.

By executing such a procedure,
When a dangerous operation is performed, safety is ensured by sounding the horn 67 to notify the operator.

[Brief description of drawings]

FIG. 1 is a front view showing the configuration of a power steering lever that executes a turn by tilting left and right sides.

FIG. 2 is a block diagram showing an electric circuit that performs automatic control for executing straight-ahead steering and turning actions.

FIG. 3 is a flowchart showing a procedure for performing a steering turn by using two types of braking forces on driving wheels.

FIG. 4 is a diagram showing the braking pressure of the drive wheels, which is constant during mowing work and variable during non-mowing work.

FIG. 5 is a diagram showing a rotation state of drive wheels on the inner side of a turn due to a brake turn and a spin turn.

FIG. 6 is a diagram showing a state of constant weak braking force and strong braking force during mowing and non-mowing.

FIG. 7 is a diagram showing a state in which the operation output amount of the power steering lever at the time of cutting is attenuated after the operation is finished.

FIG. 8 is a front development view showing an arrangement state of gears according to a transmission configuration of a traveling mission case.

FIG. 9 is a side view showing an arrangement state of gears in the transmission configuration of the traveling mission case.

FIG. 10 is a front development view showing the planetary gear mechanism in the transmission configuration of the traveling mission case.

FIG. 11 is a front view showing a planetary gear mechanism in a transmission configuration of a traveling mission case.

FIG. 12 is a perspective view showing a state in which each planetary gear protrudes from the outer peripheral surface of the carrier of the planetary gear mechanism.

FIG. 13 is a side view showing an arrangement state of each planetary gear in the planetary gear mechanism and a rotation direction thereof.

FIG. 14 is a side view showing the overall configuration of the combine.

FIG. 15 is a flow chart showing a procedure for preventing danger by operating the grain auger in the Glen tank.

FIG. 16 is a plan view in which a horn is arranged to notify an improper operation of a grain storage auger of a Glen tank.

[Explanation of symbols]

1. Power steering lever 2. Traveling drive wheels 3. Position sensor 4. Sensor switch 5. Means of selection

Claims (3)

[Claims] 1. In a combine or the like which performs a turning action in conjunction with a tilting operation of the power steering lever 1 to the left and right sides, the tilting operation amount by the lever 1 is detected at an appropriate position of the power steering lever 1 to detect the turning inside. A position sensor 3 for outputting a variable braking force to the traveling drive wheel 2 and the lever 1
And a left and right sensor switch 4 for outputting a constant braking force to the traveling drive wheels 2 on the inside of the turn when the turning control device is turned on by a tilting operation by a predetermined angle. 2. In a combine or the like which performs a turning action in conjunction with a tilting operation of the power steering lever 1 to the left and right sides, the tilting operation amount by the lever 1 is detected at an appropriate position of the power steering lever 1 to detect the turning inside. A position sensor 3 for outputting a variable braking force to the traveling drive wheel 2 and the lever 1
And a sensor switch 4 for outputting a constant braking force to the traveling drive wheel 2 on the inside of the turn when the switch is turned on by a tilting operation by a predetermined angle. The turning control device according to claim 1, wherein the turning control device is used during work. 3. In a combine or the like which performs a turning action in conjunction with a tilting operation of the power steering lever 1 to the left and right sides, the tilting operation amount by the lever 1 is detected at an appropriate position of the power steering lever 1 to detect the turning inside. A position sensor 3 for outputting a variable braking force to the traveling drive wheel 2 and the lever 1
And a sensor switch 4 for outputting a constant braking force to the traveling drive wheels 2 on the inside of the turn when turned on by a tilting operation of a predetermined angle by the selector means 5 for selecting the position sensor 3 and the sensor switch 4. 2. The turning control device according to claim 1, wherein the lever is provided at or near the lever 1.