JP2007008321A - Turning device for combine - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a turning device for a combine capable of making fine adjustments in the running direction of the combine body with high response performance by operating switches mounted on a rotating-operation-type steering operation means. <P>SOLUTION: This turning device is constructed so as to differentially move right and left axles by the fact that an output from an infinite variable-speed drive (1) for traveling is combined with an output from a infinite variable-speed drive (5) for steering by right and left planetary gear mechanisms 3L, 3R. The right and left output shafts of the right and left planetary gear mechanisms (3L, 3R) work with right and left axles (11L, 11R) through right and left side clutches (12L, 12R). The rotating-operation-type steering operation means (13) for shifting gears of the infinite variable-speed drive 5 for steering is equipped with the switches (14L, 14R) for intermittently operating the right and left side clutches (12L, 12R). <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a combine turning device.

Conventionally, a combine turning device is configured to operate without turning on the transmission of driving force to the axle on the inner side of the turn by operating the side clutch on the left and right sides when turning.
However, in such a configuration, for example, in a wet paddy field, the traveling device sinks and the axle inside the turning is not driven, so the axle inside the turning immediately stops, and this is driven by driving the axle outside the turning. The crawler on the outside of the swivel slipped while scraping the mud and had a drawback that it could easily fall into a state in which the swirl was impossible.

Therefore, for example, as shown in Patent Document 1, the output shaft of the traveling continuously variable transmission and the sun gears of the left and right planetary gear mechanisms are interlocked, and the output shaft of the steering continuously variable transmission and the left and right planetary gear mechanisms are connected. The gear portion provided on the ring gear side of the left and right ring gears is interlocked via a reverse transmission mechanism that relatively reversely rotates the left and right ring gears, and the left and right planetary gear mechanisms of the left and right carriers and the left and right axles are interlocked. A technique has been attempted in which the output rotation of the continuously variable transmission for turning is changed by rotating the steering operation tool, and the axle inside the turning is turned forward or backward at a slow speed.
JP 2001-18825 A

At the time of combine work, it is necessary to carry out cutting and traveling while finely adjusting the traveling direction of the aircraft along the row of planted cereals.
On the other hand, in the configuration described in Patent Document 1, the steering operation tool cannot be operated unless the steering operation tool is rotated. Even if it tries to follow the row of planted cereals, it tends to cause a delay in the timing of the aircraft's steering operation with respect to the steering operation, and fine adjustment of the degree of steering is difficult. There is a problem that the cutting operation cannot be performed at high speed while steering along the row, and the efficiency of the cutting operation by the combine is lowered.

In order to solve the above-mentioned problems, the present invention takes the following technical means.
That is, the invention according to claim 1 is operated by interlocking the output shaft (2) of the continuously variable transmission (1) for traveling with the sun gears (4L, 4R) of the left and right planetary gear mechanisms (3L, 3R). The left and right ring gears include an output shaft (6) of the continuously variable transmission (5) and gear portions (8L, 8R) provided on the ring gear (7L, 7R) side of the left and right planetary gear mechanisms (3L, 3R). The left and right planetary gear mechanisms (3L, 3R) and the left and right carriers (10L, 10R) and left and right axles ( 11L, 11R) via the left and right side clutches (12L, 12R) and the rotary operation type steering operation tool (13) for shifting the steering continuously variable transmission (5). Switch for intermittent operation of left and right side clutches (12L, 12R) 14L, is obtained by a combined Swivel characterized in that a 14R).

  When the vehicle travels straight, driving force is input from the output shaft 2 of the traveling continuously variable transmission 1 to the left and right planetary gear mechanisms 3L and 3R, while the output shaft 6 of the steering continuously variable transmission 5 stops. Therefore, the left and right ring gears 7L and 7R are stopped. Therefore, the left and right axles 11L and 11R are both rotated forward at the same speed by the rotation of the left and right carriers 10L and 10R due to the revolution of the left and right planetary gears. Go straight ahead.

  On the other hand, at the time of turning, when the steering operation tool 13 starts to rotate, the output shaft 6 of the steering continuously variable transmission 5 starts shifting driving, and this rotation causes the left and right ring gears 7L via the reverse transmission mechanism 9. , 7R are input as relative rotations, and the rotation of the left and right ring gears 7L, 7R and the rotation of the left and right sun gears 4L, 4R are combined by the left and right planetary gear mechanisms 3L, 3R, respectively. To the left and right carriers 10L and 10R, the left and right axles 11L and 11R are driven to rotate forward at different speeds, and the aircraft slowly turns in the rotational operation direction of the steering operation tool 13. . Further, when the rotation operation angle of the steering operation tool 13 is further increased, the left and right carriers 10L and 10R start to rotate in opposite directions, and the left and right axles 11L and 11R are reversed to each other, and the steering operation tool 13 is rotated. The axle on the operating side reverses and the aircraft turns in super trust.

  In addition, when the switches 14L and 14R provided on the steering operation tool 13 are operated so as to follow the row of planted cereals during cutting, the side clutch 12L or 12R on the operation side is cut off, and the fuselage It is steered to the side.

  According to the second aspect of the present invention, the output shaft (2) of the continuously variable transmission (1) and the sun gears (4L, 4R) of the left and right planetary gear mechanisms (3L, 3R) are interlocked to perform steering. Output gear (6) of the continuously variable transmission (5) and the gear portions (8L, 8R) provided on the ring gear (7L, 7R) side of the left and right planetary gear mechanisms (3L, 3R) The left and right planetary gear mechanisms (3L, 3R) and the left and right carriers (10L, 10R) and left and right axles ( 11L, 11R) via the left and right side clutches (12L, 12R) and the rotary operation type steering operation tool (13) for shifting the steering continuously variable transmission (5). Switch for intermittent operation of left and right side clutches (12L, 12R) 14L, 14R) and the output shaft (5) of the steering continuously variable transmission (5) when the left and right side clutches (12L, 12R) are disengaged by the operation of the switches (14L, 14R). This is a combine turning device characterized in that steering output check means (15) for braking the rotation of 6) is provided.

  When the vehicle travels straight, driving force is input from the output shaft 2 of the traveling continuously variable transmission 1 to the left and right planetary gear mechanisms 3L and 3R, while the output shaft 6 of the steering continuously variable transmission 5 stops. Therefore, the left and right ring gears 7L and 7R are stopped. Therefore, the left and right axles 11L and 11R are both rotated forward at the same speed by the rotation of the left and right carriers 10L and 10R due to the revolution of the left and right planetary gears. Go straight ahead.

  On the other hand, at the time of turning, when the steering operation tool 13 starts to rotate, the output shaft 6 of the steering continuously variable transmission 5 starts shifting driving, and this rotation causes the left and right ring gears 7L via the reverse transmission mechanism 9. , 7R are input as relative rotations, and the rotation of the left and right ring gears 7L, 7R and the rotation of the left and right sun gears 4L, 4R are combined by the left and right planetary gear mechanisms 3L, 3R, respectively. To the left and right carriers 10L and 10R, the left and right axles 11L and 11R are driven to rotate forward at different speeds, and the aircraft slowly turns in the rotational operation direction of the steering operation tool 13. . Further, when the rotation operation angle of the steering operation tool 13 is further increased, the left and right carriers 10L and 10R start to rotate in opposite directions, and the left and right axles 11L and 11R are reversed to each other, and the steering operation tool 13 is rotated. The axle on the operating side reverses and the aircraft turns in super trust.

  In addition, when the switches 14L and 14R provided on the steering operation tool 13 are operated so as to follow the row of planted cereals during cutting, the side clutch 12L or 12R on the operation side is cut off, and the fuselage It is steered to the side.

  If the left and right side clutches 12L, 12R are thus disconnected by the operation of the switches 14L, 14R, the steering continuously variable transmission 5 can be operated even if the steering operation tool 13 is rotated. The rotation of the output shaft 6 is braked by the steering output check means 15, and the steering by the left and right planetary gear mechanisms 3L, 3R is not performed.

  Further, the invention according to claim 3 links the output shaft (2) of the continuously variable transmission (1) with the sun gears (4L, 4R) of the left and right planetary gear mechanisms (3L, 3R), and steers it. Output gear (6) of the continuously variable transmission (5) and the gear portions (8L, 8R) provided on the ring gear (7L, 7R) side of the left and right planetary gear mechanisms (3L, 3R) The left and right planetary gear mechanisms (3L, 3R) and the left and right carriers (10L, 10R) and left and right axles ( 11L, 11R) via the left and right side clutches (12L, 12R) and the rotary operation type steering operation tool (13) for shifting the steering continuously variable transmission (5). Switch for intermittent operation of left and right side clutches (12L, 12R) 14L, 14R), and controls the rotational operation of the steering operation tool (13) when the left and right side clutches (12L, 12R) are disengaged by the operation of the switches (14L, 14R). This is a combine swiveling device characterized in that a direction operation check means (16) is provided.

  Thus, when traveling straight, driving force is input from the output shaft 2 of the traveling continuously variable transmission 1 to the left and right planetary gear mechanisms 3L and 3R, while the output shaft 6 of the steering continuously variable transmission 5 is provided. Since the left and right ring gears 7L and 7R are stopped because of the rotation of the left and right, the left and right axles 11L and 11R are both rotated forward at the same speed by the rotation of the left and right carriers 10L and 10R due to the revolution of the left and right planetary gears. Then the aircraft goes straight.

  On the other hand, at the time of turning, when the steering operation tool 13 starts to rotate, the output shaft 6 of the steering continuously variable transmission 5 starts shifting driving, and this rotation causes the left and right ring gears 7L via the reverse transmission mechanism 9. , 7R are input as relative rotations, and the rotation of the left and right ring gears 7L, 7R and the rotation of the left and right sun gears 4L, 4R are combined by the left and right planetary gear mechanisms 3L, 3R, respectively. To the left and right carriers 10L and 10R, the left and right axles 11L and 11R are driven to rotate forward at different speeds, and the aircraft slowly turns in the rotational operation direction of the steering operation tool 13. . Further, when the rotation operation angle of the steering operation tool 13 is further increased, the left and right carriers 10L and 10R start to rotate in opposite directions, and the left and right axles 11L and 11R are reversed to each other, and the steering operation tool 13 is rotated. The axle on the operating side reverses and the aircraft turns in super trust.

  In addition, when the switches 14L and 14R provided on the steering operation tool 13 are operated so as to follow the row of planted cereals during cutting, the side clutch 12L or 12R on the operation side is cut off, and the fuselage It is steered to the side.

  When the left and right side clutches 12L, 12R are thus disengaged by operating the switches 14L, 14R as described above, even if the steering operation tool 13 is to be rotated, the steering operation check means 16 controls the operation. Since the rotation operation of the direction operating tool 13 is restrained, the output shaft 6 of the steering continuously variable transmission 5 does not rotate, and the steering by the left and right planetary gear mechanisms 3L, 3R is not performed.

  According to the first aspect of the present invention, when turning a large amount by turning the steering operation tool 13 such as turning on a farm field or turning on a road, the axle on the inner side of the turn is driven at a slow speed. A switch provided on the steering operation tool 13 during the cutting operation while the traction force decreases little because it turns due to the difference in driving speed with the axle outside the turning, and can turn smoothly even in a wet field, for example. By operating 14L and 14R, transmission of the driving force to the left and right axles can be cut off to finely adjust the traveling direction of the aircraft with good responsiveness, and the work efficiency of the combine can be improved.

  According to the second aspect of the present invention, when the vehicle turns significantly by rotating the steering operation tool 13, such as when turning on a farm field or turning on a road, the axle inside the turn is driven at a slow speed. However, since the vehicle turns with a difference in driving speed with the axle on the outside of the turn, there is little reduction in traction force, and for example, it can turn smoothly even in a wet field, but it is provided in the steering operation tool 13 during cutting cutting. Further, by operating the switches 14L and 14R, transmission of the driving force to the left and right axles can be cut off to finely adjust the traveling direction of the fuselage with good responsiveness, and the work efficiency of the combine can be improved. Further, when the left and right side clutches 12L and 12R are disconnected by operating the switches 14L and 14R as described above, the steering continuously variable transmission 5 can be operated even if the steering operation tool 13 is rotated. The rotation of the output shaft 6 is braked by the steering output check means 15 and is not steered by the left and right planetary gear mechanisms 3L, 3R. It is possible to reduce the occurrence of off-line and disturbance of cuts.

  According to the third aspect of the present invention, when the vehicle turns significantly by rotating the steering operation tool 13, such as when turning on a field or turning on a road, the axle inside the turn is driven at a slow speed. However, since the vehicle turns with a difference in driving speed with the axle on the outside of the turn, there is little reduction in traction force, and for example, it can turn smoothly even in a wet field, but it is provided in the steering operation tool 13 during cutting cutting. Further, by operating the switches 14L and 14R, transmission of the driving force to the left and right axles can be cut off to finely adjust the traveling direction of the fuselage with good responsiveness, and the work efficiency of the combine can be improved. Further, when the left and right side clutches 12L and 12R are disconnected by the operation of the switches 14L and 14R as described above, even if the steering operation tool 13 is to be rotated, the steering operation check means 16 controls the operation. Since the rotation operation of the direction operating tool 13 is restrained, the output shaft 6 of the steering continuously variable transmission 5 does not rotate and the steering by the left and right planetary gear mechanisms 3L and 3R is not performed. Even if a rotational operation force is applied to the steering operation tool 13, the aircraft does not make a sudden turn, and the occurrence of detachment and disturbance of the cuts can be reduced.

An embodiment of an endless track type traveling device according to the present invention will be described by taking a self-removing combine as an example.
As shown in FIG. 1, this combine is mounted with a control unit 18 and a grain storage tank 19 arranged on the left and right sides on the upper left and right sides of the left and right crawler type traveling devices 17L and 17R, while the left and right other sides are mounted. The threshing device 20 is mounted on the threshing device 20, and a reaping device 21 is arranged on the front side of the threshing device 20 so as to be movable up and down.

  The reaping device 21 includes a foreground weed 22 that weeds the planted cereal and a lag-type trigger that is obliquely arranged on the rear side of the planted cereal that has been weeded by the weed 22 A device 23, a cutting blade 24 that cuts the planted culm raised by the pulling device 23, and a conveying device (not shown) that transports the culm harvested by the cutting blade 24 to the feed chain of the rear threshing device 20. And can be adjusted up and down by a hydraulic cylinder (not shown).

  In addition, the threshing device 20 includes an upper handling chamber in which a handling cylinder is installed, and a lower sorting chamber in which Kara, a swing sorting shelf, a first spiral, and a second spiral are installed, and the outside of the handling chamber. The above-described feed chain is disposed, and a dust exhaust fan is provided at a rear portion of the handling chamber.

  In addition, the grain storage tank 19 is made of iron in the lower ridge portion that houses the bottom conveying spiral, the upper tank that occupies most of the storage volume is integrally formed by blow molding of synthetic resin, and the lower portion of the upper tank is formed in the lower ridge It is set to be fitted and attached to the inside of the upper part of the part, and a fixing fixture is provided and fixed between the first cereal cylinder and the upper tank arranged on the back side of the machine body. In addition, a swivelable milling cylinder 25 that is continuous with the bottom conveying spiral is erected on the rear side of the grain storage tank 19, and the base of the discharge cylinder 26 is turned up and down at the upper end of the milling cylinder 25. The gas cylinder 27 is connected in a freely communicating manner, and a gas damper 27 is attached between the upper portion of the cerealing cylinder 25 and the base of the discharge cylinder 26, and a turning operation handle 28 is attached to the lower surface of the intermediate portion of the discharge cylinder 26.

  The control unit 18 is raised from the upper surface of an engine cover 29 that houses the engine E, a seat 30 that is attached to the upper surface of the engine cover 29, and a front operation post 31 that stands in front of the seat 30. A round steering handle 13 and a main shift lever 32 that shifts a cutting clutch lever, a threshing clutch lever, and a continuously variable transmission 1 that will be described later. An auxiliary transmission lever and the like are arranged.

Thus, a mission case 33 for driving the left and right traveling devices 17L and 17R is disposed in the front lower portion of the threshing device 20.
As shown in FIG. 2, a traveling hydraulic motor 34 as the traveling continuously variable transmission 1 is attached to the upper side of the transmission case 33. The traveling hydraulic motor 34 is attached to the lower one side of the oil passage block 35 and is driven by oil feeding from a traveling hydraulic pump 36 attached to the upper one side of the oil passage block 35. The traveling hydraulic pump 36 receives supply of driving force from an output shaft 37 of the engine E through an output pulley 38, a transmission belt 39, and an input pulley 40, and revolves an internal plunger so that the main transmission lever The swash plate angle adjusting arm 41 is rotated by the operation of 32 to change the swash plate angle with which the plunger piston slides. As a result, the amount of oil supplied to the traveling hydraulic motor 34 can be changed, and the rotational speed of the output shaft 2 of the traveling hydraulic motor 34 can be continuously variable forward and backward.

  A steering hydraulic pump 42 is attached to the other side of the oil path block 35. The internal structure of the steering hydraulic pump 42 is the same as that of the traveling hydraulic pump 36 described above. Then, the steering hydraulic pump 42 and a steering hydraulic motor 43 to be described later are connected through oil passages 44 for supplying and returning oil.

  Then, the middle of the swash plate angle adjusting arm 45 of the steering hydraulic pump 42 and the tip of the operation arm 46 that rotates integrally with the steering operation tool 13 around the rotation axis of the steering operation tool 13. The parts are connected by an operation interlocking rod 47. As a result, when the steering operation tool 13 is rotated left and right, the swash plate angle adjusting arm 45 is rotated forward and backward from the operation arm 46 via the operation interlocking rod 47, and the steering hydraulic pump 42 The discharge oil amount and the discharge direction are changed, and the rotational speed of the output shaft 6 of the steering hydraulic motor 43 is continuously variable in the forward and reverse directions.

The left and right switches 14L and 14R are disposed on the left and right spoke portions of the steering operation tool 13, respectively.
Further, left and right push cylinders 48L and 48R are arranged on both sides of the tip of the swash plate angle adjusting arm 45, and the automatic direction is arranged forward and backward on the left and right push cylinders 48L and 48R and the rear side of the weed ridge 22. The control sensors 49F and 49R are electrically connected. When the steering operation check means 16 performs automatic direction control to follow the planted culm row, the left and right push cylinders 48L, 48L,, based on the culm detection signals from the automatic direction control sensors 49F, 49R. 48R both extend and contact or approach both sides of the swash plate angle adjusting arm 45, and the rotation of the swash plate angle adjusting arm 45 is restricted to the neutral region (straight forward position).

  The transmission mechanism in the transmission case 33 will be described. The output shaft 2 of the traveling hydraulic motor 34 of the traveling continuously variable transmission 1 is attached to one end portion of the input shaft 50 that pivots on the transmission case 33. Are connected by spline fitting, and an auxiliary transmission gear 51 provided on the input shaft 50 so as to be slidable is provided to be slidable by operation of the auxiliary transmission lever. Then, the auxiliary transmission is configured by selective engagement of the plurality of passive gears 53 provided on the intermediate shaft 52 pivoted on the lower side of the input shaft 50 and the auxiliary transmission gear 51. Further, the intermediate output gear 54 fixed to the intermediate shaft 52 and the center input gear 56 fixed to the differential input shaft 55 pivoted on the lower side of the intermediate shaft 52 are meshed with each other. Are provided with planetary gear mechanisms 3L and 3R. The left and right planetary gear mechanisms 3L and 3R support the left and right sun gears 4L and 4R fixed to the differential input shaft 55 and the three planetary gears 57 and 57 meshing with the left and right sun gears 4L and 4R. The dynamic input shaft 55 has the same axis, but has left and right carriers 10L and 10R fixed to the left and right differential output shafts 58 and 58 that have different rotations, and internal gears that mesh with the planetary gears 57 and 57. The left and right ring gears 7L and 7R are loosely fitted to the differential output shafts 58 and 58, respectively.

  Then, the external teeth of the left ring gear 7L are engaged with the left gear 60L fixed to the reverse rotation shaft 59, and the right gear 60R fixed to the reverse rotation shaft 59 is engaged with the right ring gear 7R via the counter gear 61. . The reverse rotation shaft 59 and the counter gear 61 constitute the reverse rotation transmission mechanism 9. Then, the steering output gear 63 fixed to the output shaft 6 of the steering hydraulic motor 43 is engaged with the input gear 62 fixed to the left end of the reverse rotation shaft 59. Further, a multi-plate clutch type steering brake 64 for braking the output shaft 6 of the steering hydraulic motor 43 is provided. This is the steering output check means 15.

  Further, the left and right differential output gears 65L and 65R fixed to the left and right differential output shafts 58 and 58 mesh with the left and right side input gears 67L and 67R fixed to the left and right side clutch shafts 66L and 66R. . Left and right side clutch gears 68L and 68R are loosely fitted to the left and right side clutch shafts 66L and 66R, and a claw clutch type is provided between the left and right side clutch gears 68L and 68R and the left and right side input gears 67L and 67R. Left and right side clutches 12L and 12R are formed. In addition, left and right side brakes 69L and 69R are disposed outside the left and right side clutch gears 68L and 68R, respectively.

  The left and right side clutch gears 68L and 68R are meshed with the left and right wheel gears 70L and 70R fixed to the inner ends of the left and right axles 11L and 11R. The crawlers of the left and right traveling devices 17L and 17R are driven by the left and right wheel sprockets 71L and 71R fixed to the outer ends of the left and right axles 11L and 11R.

  Further, as shown in FIG. 3, an oil feed path 74 is connected to the discharge side of a hydraulic pump 72 driven by the engine E via a direction switching valve 73, and the oil feed path 74 is connected via a check switching valve 75. Thus, the left and right push cylinders 48L, 48R constituting the steering operation check means 16 are connected so that oil can be fed simultaneously. Further, the oil supply passage 74 is connected to the operating cylinder 77 of the steering brake 64 constituting the steering output check means 15 via the check switching valve 76 so as to be able to supply oil. Further, the left and right steering push cylinders that intermittently actuate the left and right side clutches 12L, 12R from the oil feed path 74 via a three-position switching valve 78 (sliding the left and right side clutch gears 68L, 68R left and right). 79L and 79R are alternatively connected so that oil can be supplied. The front and rear automatic direction control sensors 49F and 49R and the left and right switches 14L and 14R are connected to the left and right operating solenoids 80L and 80R of the three-position switching valve 78 via a controller 81. . 82 is a variable relief valve provided in the oil return passage 83 that is discharged from the side clutch disengagement position in the left and right steering push cylinders 79L, 79R. It controls the braking force of the left and right side brakes 69L, 69R. Reference numeral 84 denotes a relief valve provided for safety during overload.

  As shown in FIG. 4, on the input side of the controller 81, the left and right switches 14L and 14R, a potentiometer 85 for detecting the raising / lowering position of the mowing device 21 with respect to the aircraft, and the backward travel of the aircraft are detected. The reverse sensor 86 and the automatic direction control sensors 49F and 49R are connected to the output side of the operation solenoids 87L and 87R of the left and right push cylinders 48L and 48R and the operation cylinder 77 of the steering brake 64, respectively. The operating solenoids 88L and 88R are connected to the left and right operating solenoids 89L and 89R for the left and right steering push cylinders 79L and 79R.

  With the above configuration, when traveling straight, driving force is input from the output shaft 2 of the traveling continuously variable transmission 1 to the left and right planetary gear mechanisms 3L and 3R, while the output shaft 6 of the steering continuously variable transmission 5 is Since the left and right ring gears 7L and 7R are stopped because they are stopped, the left and right axles 11L and 11R are both rotated forward at the same speed by the rotation of the left and right carriers 10L and 10R due to the revolution of the left and right planetary gears. The aircraft goes straight.

  On the other hand, at the time of turning, when the steering operation tool 13 starts to rotate, the output shaft 6 of the steering continuously variable transmission 5 starts shifting driving, and this rotation causes the left and right ring gears 7L via the reverse transmission mechanism 9. , 7R are input as relative rotations, and the rotation of the left and right ring gears 7L, 7R and the rotation of the left and right sun gears 4L, 4R are combined by the left and right planetary gear mechanisms 3L, 3R, respectively. To the left and right carriers 10L and 10R, the left and right axles 11L and 11R are driven to rotate forward at different speeds, and the aircraft slowly turns in the rotational operation direction of the steering operation tool 13. . Further, when the rotation operation angle of the steering operation tool 13 is further increased, the left and right carriers 10L and 10R start to rotate in opposite directions, and the left and right axles 11L and 11R are reversed to each other, and the steering operation tool 13 is rotated. The axle on the operating side reverses and the aircraft turns in super trust.

  Further, when the switches 14L and 14R provided on the steering operation tool 13 are operated so as to follow the planted grain row during the cutting, the controller 81 controls the steering push cylinder 79L or 79R on the operating side. By the output to the operating solenoid 89L or 89R, the side clutch 12L or 12R on the operation side is disconnected, and the airframe is slightly steered to this side.

  If the left and right side clutches 12L, 12R are thus disconnected by the operation of the switches 14L, 14R, the steering continuously variable transmission 5 can be operated even if the steering operation tool 13 is rotated. The rotation of the output shaft 6 is braked by the steering output check means 15, and the steering by the left and right planetary gear mechanisms 3L, 3R is not performed. That is, an output is made from the controller 81 to the actuating solenoids 87L and 87R of the left and right push cylinders 48L and 48R, and both the left and right push cylinders 48L and 48R are extended so as not to contact both sides of the swash plate angle adjusting arm 45. Approaching, the rotation of the swash plate angle adjusting arm 45 is restricted or forcibly returned to the neutral range (straight forward position).

  Alternatively, when the left and right side clutches 12L, 12R are disengaged by the operation of the switches 14L, 14R in this way, even if the steering operation tool 13 is to be rotated, the steering operation check means 16 operates the steering operation control means 16. Since the rotation operation of the direction operating tool 13 is restrained, the output shaft 6 of the steering continuously variable transmission 5 does not rotate, and the steering by the left and right planetary gear mechanisms 3L, 3R is not performed. That is, an output is made from the controller 81 to the actuating solenoids 88L, 88R of the actuating cylinder 77 of the steering brake 64, and the output shaft 6 of the steering hydraulic motor 43 is braked to steer to the left and right ring gears 7L, 7R. The driving force for use is not transmitted.

  Further, when automatic direction control by the automatic direction control sensors 49F and 49R is enabled, a state in which both of the automatic direction control sensors 49F and 49R do not detect corn straw is set as a neutral state, and one of them is When a grain candy is detected, the side clutch 12L or 12R on this side is cut off by the output from the controller 81 to the actuating solenoid 89L or 89R of the other steering push cylinder 79L or 79R, and the aircraft leaves the grain cocoon. Slightly steered in the direction. While the automatic direction control is performed in this way, an output is made from the controller 81 to the operating solenoids 87L and 87R of the left and right push cylinders 48L and 48R, and both the left and right push cylinders 48L and 48R are extended to Abutting or approaching both sides of the swash plate angle adjusting arm 45, the rotation of the swash plate angle adjusting arm 45 is restricted or forcibly returned to the neutral range (straight forward position). In this case, when the steering operation tool 13 is in a state where the rotation operation itself is impossible or the steering operation tool 13 has already been rotated, the steering operation tool 13 is forcibly returned to the neutral range. Is done.

  Further, a steering operation angle detection potentiometer 90 for detecting the rotation angle of the swash plate angle adjusting arm 45 is provided, and the steering operation angle detection potentiometer 90 is connected to the input side of the controller 81 for steering. When the switch 14L or 14R is operated while turning the operating tool 13 while turning, the controller 81 does not output to the operating solenoids 89L and 89R of the left and right steering push cylinders 79L and 79R. It may be set not to be performed. That is, the state in which the steering operation tool 13 is being rotated is a turn intended by the operator, and the switch 14L or 14R is erroneously operated during this turn, and the side clutch 12L or 12R is cut off, causing the aircraft to be careless. It can prevent turning. That is, the steering by the operation of the steering operation tool 13 is prioritized over the steering by the operation of the switch 14L or 14R.

  When either the switch 14L or 14R is operated, an output is first made from the controller 81 to the operating solenoid 88L or 88R of the operating cylinder 77 of the steering brake 64, and the output shaft 6 of the steering hydraulic motor 43 is output. Is braked, and the driving force for steering to the left and right ring gears 7L and 7R is not transmitted. Thereafter, an output is made from the controller 81 to the operating solenoid 89L or 89R, and the steering push cylinder 79L or 79R is operated. The timing may be set so that the left and right side clutches 12L or 12R are disconnected by operating.

  On the contrary, when one of the switches 14L or 14R is operated, an output is first made from the controller 81 to the operating solenoid 89L or 89R, and the steering push cylinder 79L or 79R is operated, The side clutch 12L or 12R on one side is disconnected, and thereafter, an output is made from the controller 81 to the operating solenoid 88L or 88R of the operating cylinder 77 of the steering brake 64, and the output shaft 6 of the steering hydraulic motor 43 is braked. Then, the timing may be set so that the steering driving force to the left and right ring gears 7L, 7R is not transmitted.

  Further, when either of the switches 14L or 14R is operated, the controller 81 does not output to the operating solenoid 89L or 89R, and the left and right side clutches 12L and 12R remain connected, and the controller 81 Output to the actuating solenoids 87L and 87R of the push cylinders 48L and 48R, one of the left and right push cylinders 48L and 48R is extended and the other is shortened, and the swash plate angle adjusting arm 45 is moved from the neutral region. The output shaft 6 of the steering hydraulic motor 43 may be connected to rotate at a low speed by turning left or right by a predetermined angle. Thus, constant minute differential steering is performed by the steering continuously variable transmission 5 and the left and right planetary gear mechanisms 3L and 3R regardless of the rotational operation angle of the steering operating tool 13.

  Further, in a state where the reverse sensor 86 for detecting the reverse travel of the airframe detects the reverse travel state of the airframe, the controller 81 does not move to the operating solenoids 89L and 89R regardless of which of the switches 14L or 14R is operated. You may connect so that the connection state of the left and right side clutches 12L and 12R may be maintained without being output. As a result, the steering by the switches 14L and 14R is restricted during backward traveling, and the steering by only the steering operating tool 13 becomes possible, and the vehicle cannot turn due to insufficient driving force of the traveling device 17L or 17R inside the turning. Can be avoided.

  Further, in a state where the potentiometer 85 that detects the raising / lowering position of the reaping device 21 relative to the airframe detects that the reaping device 21 has been raised above the set height, either the switch 14L or 14R can be operated. The controller 81 may be connected so that the left and right side clutches 12L and 12R are maintained in the connected state without being output to the operating solenoids 89L and 89R. As a result, the steering by the switches 14L and 14R is restricted during turning when the reaping device 21 is raised, and the steering by only the steering operation tool 13 becomes possible, and due to insufficient driving force of the traveling device 17L or 17R inside the turn. It is possible to avoid falling into a state incapable of turning.

  Further, the switches 14L and 14R provided in the spoke portion of the steering operation tool 13 may be configured as a single toggle type switch or a stick type switch. If comprised in this way, the left-right steering operation with one finger can be performed easily. Further, when the single toggle-type switch or stick-type switch is operated in the front-rear direction or the up-down direction so that the reaping device 21 can be moved up and down, the operability in the combine work is improved.

  Further, as described above, when either the left or right switch 14L or 14R is operated, an output is made from the controller 81 to the operating solenoid 89L or 89R, and the steering push cylinder 79L or 79R is operated to The side clutch 12L or 12R on the side is shut off, and an output is made from the controller 81 to the operating solenoid 88L or 88R of the operating cylinder 77 of the steering brake 64, and the output shaft 6 of the steering hydraulic motor 43 is braked. In this state, the steering driving force is not transmitted to the left and right ring gears 7L and 7R, and the left and right side clutches 12L or 12R are disconnected in this way, and the steering operation tool 13 is left or right. Is rotated from the controller 81 to the operating solenoid 89R or 89L. The push cylinder 79R or 79L is reversely operated, the disconnected side clutch 12L or 12R is connected, and thereafter, the output shaft 6 of the steering hydraulic motor 43 may be connected to start rotating. . That is, steering by the steering operating tool 13 is given priority over steering by the switch 14L or 14R.

  When either the switch 14L or 14R is operated, an output is made from the controller 81 to the operating solenoid 88L or 88R of the operating cylinder 77 of the steering brake 64, and the output shaft 6 of the steering hydraulic motor 43 is braked. As a result, the steering driving force to the left and right ring gears 7L, 7R is not transmitted, and the controller 81 outputs an operation solenoid 89L or 89R to operate the steering push cylinder 79L or 79R. When the left and right side clutches 12L or 12R are disconnected and the operation of the switch 14L or 14R is continued for a set time or longer, the controller 81 moves to the operating solenoid 88L or 88R of the operating cylinder 77 of the steering brake 64. Is stopped and the output shaft 6 of the steering hydraulic motor 43 is controlled. There is released may be in tandem so that the rotation of the output shaft 6 of the hydraulic motor 43 for 該操 direction is started.

It is a side view for description of a combine. It is system explanatory drawing of the turning apparatus of a combine. It is a hydraulic circuit diagram. It is a block circuit diagram.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Traveling continuously variable transmission 2 Output shaft 3L Left planetary gear mechanism 3R Right planetary gear mechanism 4L Left sun gear 4R Right sun gear 5 Steering continuously variable transmission 6 Output shaft 7L Ring gear 7R Ring gear 8L Gear part 8R Gear Part 9 Reverse transmission mechanism 10L Left carrier 10R Right carrier 11L Left axle 11R Right axle 12L Left side clutch 12R Right side clutch 13 Steering operation tool 14L Switch 14R Switch 15 Steering output check means 16 Steering operation Checking means

Claims (3)

  The output shaft (2) of the continuously variable transmission (1) and the sun gears (4L, 4R) of the left and right planetary gear mechanisms (3L, 3R) are interlocked to output the steering continuously variable transmission (5). The shaft (6) and the gear portions (8L, 8R) provided on the ring gear (7L, 7R) side of the left and right planetary gear mechanisms (3L, 3R) are relatively opposite to the left and right ring gears (7L, 7R). The left and right carriers (10L, 10R) and the left and right axles (11L, 11R) of the left and right planetary gear mechanisms (3L, 3R) are linked together via a reverse transmission mechanism (9) that gives rotation to the left and right side clutches. (12L, 12R) and the left and right side clutches (12L, 12R) are connected to a rotary operation type steering operation tool (13) for shifting the steering continuously variable transmission (5). A switch (14L, 14R) for intermittent operation is provided. Combine the turning device according to claim.   The output shaft (2) of the continuously variable transmission (1) and the sun gears (4L, 4R) of the left and right planetary gear mechanisms (3L, 3R) are interlocked to output the steering continuously variable transmission (5). The shaft (6) and the gear portions (8L, 8R) provided on the ring gear (7L, 7R) side of the left and right planetary gear mechanisms (3L, 3R) are relatively opposite to the left and right ring gears (7L, 7R). The left and right carriers (10L, 10R) and the left and right axles (11L, 11R) of the left and right planetary gear mechanisms (3L, 3R) are linked together via a reverse transmission mechanism (9) that gives rotation to the left and right side clutches. (12L, 12R) and the left and right side clutches (12L, 12R) are connected to a rotary operation type steering operation tool (13) for shifting the steering continuously variable transmission (5). Provide switches (14L, 14R) for intermittent operation, An operation for braking the rotation of the output shaft (6) of the steering continuously variable transmission (5) when the left and right side clutches (12L, 12R) are disengaged by the operation of the switches (14L, 14R). A turner for a combine, comprising a direction output check means (15).   The output shaft (2) of the continuously variable transmission (1) and the sun gears (4L, 4R) of the left and right planetary gear mechanisms (3L, 3R) are interlocked to output the steering continuously variable transmission (5). The shaft (6) and the gear portions (8L, 8R) provided on the ring gear (7L, 7R) side of the left and right planetary gear mechanisms (3L, 3R) are relatively opposite to the left and right ring gears (7L, 7R). The left and right carriers (10L, 10R) and the left and right axles (11L, 11R) of the left and right planetary gear mechanisms (3L, 3R) are linked together via a reverse transmission mechanism (9) that gives rotation to the left and right side clutches. (12L, 12R) and the left and right side clutches (12L, 12R) are connected to a rotary operation type steering operation tool (13) for shifting the steering continuously variable transmission (5). Provide switches (14L, 14R) for intermittent operation, Steering operation check means (16) for restricting the rotational operation of the steering operation tool (13) when the left and right side clutches (12L, 12R) are disengaged by the operation of the switches (14L, 14R). A combine turning device characterized in that it is provided.

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