JP2000253731A - Reaping speed changer in combine harvester or the like - Google Patents

Abstract

PROBLEM TO BE SOLVED: To resolve a problem delaying pulling up speed and lowering a pulling up performance according to a speed change on changing a pulling up speed from a standard mode to a fallen mode and simultaneously changing a vehicle speed from middle speed to low speed in a reaping work of a combine harvester. SOLUTION: This reaping speed changer has a non-stage speed changer changing a pulling up speed corresponding to a speed of the vehicle speed in a path transmitting a dynamic power from a speed changer for traveling to a reaping device and a mode switching means creating plural pulling up speeds such as a standard mode and a fallen mode according to a standing figure of unreaped culm, and an establishment of vehicle speeds of more than two stages such as a middle speed M and a low speed L in the work. In the speed changer, a ratio of a pulling up speed to a vehicle speed in switching to the fallen mode is controlled to make the time at low speed L be larger than the time at middle speed M.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a harvesting transmission such as a combine and the like, which enables a plurality of raising speeds to be changed according to the condition of uncut kernels, and the raising speed is used as a detection value of a vehicle speed. Gears, etc.

[0002]

2. Description of the Related Art In a harvesting operation of a combine or the like, a speed of a raising portion of a harvesting device is synchronized with a vehicle speed by a continuously variable transmission. The standard mode, the lodging mode, etc. are set according to the napped posture of the vehicle, and the raising speed in the falling mode is set to be higher than the standard mode according to the vehicle speed, so as to secure the raising performance for the grain culm in the falling state. Was.

[0003] However, when the lodging speed is changed from a medium speed to a low speed when raising the lodging grain in this lodging mode, the raising speed is also slowed accordingly, so that the raising action to pick up the lodging grain is performed. There was a problem that it could not be performed accurately. Thus, according to the present invention, when the raising speed is switched from the standard mode to the lodging mode during the harvesting operation of the combine, the ratio of the raising speed to the vehicle speed is made larger when the vehicle speed is lower than when the vehicle speed is medium.

[0004]

According to the present invention, there is provided a continuously variable transmission 4 for raising the speed according to the vehicle speed and changing the speed on a path for transmitting power from the traveling transmission 1 to the raising portion 3 of the mowing device 2. And a mode switching means 5 for setting a plurality of raising speeds, such as the standard mode S and the lodging mode D, according to the nurturing posture of the uncut kernels.
In setting the vehicle speed at two or more steps, control is performed such that the ratio of the wake-up speed to the vehicle speed at the time of switching to the lying mode D is larger at the low speed L than at the medium speed M. A harvesting transmission such as a combine is characterized by the following features.

[0005]

With the above arrangement, during the harvesting operation of the combine or the like, the raising speed of the raising portion 3 is synchronized with the detected value of the vehicle speed, for example, by the belt-type continuously variable transmission 4, and the raising mode is set. When the falling state is small as the standing position of the uncut culm, the standard mode S is set to the normal raising speed when the falling state is small, and when the falling state is large, the raising mode is set to the lowering mode D to be higher than the standard mode S.
In this lodging mode D, when the vehicle speed is shifted from the medium speed M to the low speed L by the traveling transmission 1, the elevating speed is slowed down and the elevating performance is reduced. By increasing the ratio of the wake-up speed to the vehicle speed, the wake-up speed does not decrease so much even when the vehicle speed becomes low L, so that the wake-up performance can be maintained satisfactorily.

[0006] The standard mode S is used as the raising mode.
The vehicle speed can be set to a value other than the medium speed M and the low speed L.

[0007]

As described above, the raising speed of the raising portion 3 is synchronized with the vehicle speed by the continuously variable transmission 4, and the raising mode is changed between the standard mode S and the lodging mode by the standing posture of the uncut grain culm. When the vehicle speed is changed to the low speed L while the raising mode is switched to the lodging mode D, the ratio of the raising speed to the vehicle speed is set to be larger than when the vehicle speed is changed to the medium speed M. By this, even if the vehicle speed becomes low L, the raising speed does not decrease much, so that the raising speed becomes slow and the raising performance decreases as in the related art, and the raising effect on the lodging grain culm is sufficient. Therefore, it is possible to perform the raising operation accurately while maintaining the raising performance in a good condition.

[0008]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 16 shows the overall structure of the combine, in which a traveling device 8 having a pair of left and right traveling crawlers 7 traveling on the soil surface is provided below the chassis 6 and is held on the chassis 6 by a feed chain 9. It comprises a grain tank 10 for threshing the culm fed and supplied, sorting and collecting the threshed grains, and temporarily storing the grains, and a dumping auger 11 for discharging the stored grains to the outside of the machine. The threshing device 12 is mounted.

In addition, adjacent to the back side of the feed chain 9, when the supply grain culm is a very short culm, only the supply inlet portion is sandwiched,
Thereafter, the threshing short culm chain 9a to be released is arranged. In front of the threshing device 12, a weeding body 13 for weeding uncut kernels from the front end side, and a raising part 3 for causing weeded grain culms,
A cutting blade section 14 for cutting the raised grain stalks, a transport adjusting section 15 for scraping the cut grain stalks and adjusting the handling depth during the transport, and taking over the grain stalks from the transport adjusting section 15 and A cutting device 2 having a feed chain 9 or a transporting supply unit 16 for transferring to a threshing short culm chain 9a is suspended from the front end of the undercarriage 6 by a hydraulically driven cutting lifting cylinder 17 so as to be able to move up and down on the soil surface. ing.

An operation device 18 for controlling the operation of the combine is provided on one side of the reaper 2 and an operation seat 19 for this operation.
The Glen tank 1 is provided behind the operation seat 19.
A cabin 21 that covers the operation device 18 and the operation seat 19 is provided while the engine 20 is mounted on the lower side of the engine 20. These reaper 2, traveling device 8, threshing device 12, operating device 18, engine 20, cabin 2
The vehicle body 22 of the combine is constituted by 1 and the like.

As shown in FIGS. 7, 8, and 9, the mowing device 2 rotatably supports a mowing input case 24 on a metal portion of a mowing frame 23 mounted on a front end of the chassis 6. A cutting input shaft 26 having a cutting input pulley 25 fixed to one end thereof is internally supported on the input case 24, and a pipe-shaped cutting main frame 27 is provided downward from the cutting input case 24. It is extended and joined, and the reaping input shaft 26 and the reaping main shaft 28 housed in the main frame 27 are interlocked and connected via a bevel gear.

The reaping main frame 27 is joined to a lower lateral transmission case 29 provided at the lower part of the reaper 2 over the entire width thereof, and the reaping main shaft 28 and the lower lateral transmission case 29 are internally mounted. The lower horizontal shaft 30 is interlocked with the lower horizontal shaft 30 via a bevel gear, and an intermediate vertical frame 31 extends obliquely upward and forward from near the left end of the lower horizontal transmission case 29. An intermediate longitudinal axis 32 housed in the intermediate vertical frame 31 is interlocked and connected via a bevel gear.

The intermediate vertical frame 31 and an upper horizontal transmission case 33 provided over the reaper 2 over its entire width are joined via a speed change case 34.
Then, a mode switching device 35 having a built-in speed change gear for switching the raising speed between the standard mode S and the falling mode D is formed. In front of the mode switching device 35, a belt-type continuously variable transmission 4 for synchronizing the elevating speed based on the detected value of the vehicle speed is arranged, and an upper lateral transmission case is provided from the intermediate longitudinal axis 32 via bevel gears. An upper horizontal shaft 36 provided inside 33 is connected to the left end of the upper horizontal shaft 36, and a rising speed sensor 4a for detecting the rising speed is arranged.

Five raising drives corresponding to the raising portions 3 joined to the upper lateral transmission case 33 for raising five rows of uncut grain culm by one center and two left and right sides. Case 37
Is projected downward, and the upper horizontal shaft 36 and the drive shaft
Each of the raising drive shafts 38 housed in the gear 37 is interlocked with each other via bevel gears, and each raising drive shaft 38 and a raising sprocket 39 for driving a raising chain 39b to which a raising lug 39a is attached are pivoted. The shaft 40 and the shaft 40 are connected to each other via a bevel gear.

A pair of left, middle, and right rag belts 41 for squeezing the stem side of the grain stalks mowed to the rear side of each of the weeds 13, and the grain stalks raked by the respective rug belts 41. , Further scraping each star wheel 42
(A, b, c) are arranged, and each of the scraped star wheels 42 is provided.
Through each of the left, middle and right stock transfer chains 43 (a, b, c) arranged in an inverted octagonal shape from the confluence to adjust the handling depth of the transported grain culm from deep to shallow The adjustment chain 44 is connected to the adjustment chain 44 in an interlocking manner.

The handling depth adjusting chain 44 is arranged so as to be able to swing up and down by driving a handling depth adjusting motor 45 with its front end as a fulcrum.
b, c) and the upper side of the handling depth adjusting chain 44, the front side of which is transported corresponding to the root side of the cereal stem, respectively.
The right-hand tip transport lugs 46 (a, b, c) are arranged to configure the transport adjusting section 15.

The grain culm which is taken over from the handling depth adjusting chain 44 and supplied to the threshing apparatus 12 is usually set to the feed chain 9 side as a standard state according to the culm length, and the extremely short culm state is used for cutting along a ridge. As the center, a feed drive shaft 49, which is linked to the cutting input shaft 26 via a bevel gear, is connected to a transport feed chain 48 that changes the feed position by driving a feed adjusting motor 47 toward the threshing short culm chain 9a. The transport supply unit 16 is arranged in a substantially triangular shape.

The cutting blade section 14 for cutting uncut culms is attached to a lower frame 50 to which a weeding rod 13a for supporting each weed body 13 below the raking star wheel 42 is fixed. And the lower frame 50 is joined to the lower lateral transmission case 29,
The left and right cutting blades 14 are configured to be able to reciprocate left and right by left and right crank mechanisms which are respectively fixed to both ends of the lower horizontal shaft 30.

As shown in FIG. 10, the right ear tip transfer lug 4
6c, at the rear side position, a handling depth detection sensor 51 that detects the handling depth position according to the culm length of the transported grain culm by ON / OFF of the tip side detection rod 51a and the stock side detection rod 51b.
And a handling depth position sensor 52 that detects the handling depth adjustment position of the handling depth adjustment chain 44 by a rotation angle of a potentiometer or the like provided on the handling depth adjustment motor 45.

A cutting height sensor 53 for detecting the elevation position of the cutting device 2 by a rotation angle of a potentiometer or the like near the metal portion of the cutting stand 23, and a cutting grain culm near the upper position of the raising portion 3. And a culm length sensor 54 for detecting ON / OFF of the length / shortness of the culm length. In the vicinity of the front end positions of the left and right scraping rug belts 41 of the transport adjusting unit 15, the presence or absence of a transported grain culm is determined by O.
The left and right grain culm sensors 55 for N / OFF detection and the grain culm sensor 56 for ON / OFF detection of the presence or absence of a conveyed grain culm near the front end position of the transport supply chain 48 are arranged and configured.

A mode switching switch 5 as mode switching means for switching the speed of the raising portion 3 of the cutting device 2 to the standard mode S or the lodging mode D by the mode switching device 35 in accordance with the standing position of the uncut culm; A handling depth control switch 57 for turning on / off the handling depth of the transported grain culm to be supplied to the threshing device 12, and a handling depth adjustment chain 44 when the extremely short culm is detected by the culm length sensor 54 at the time of cutting on the ridge. Control switch 5 that automatically adjusts the transport supply chain 48 to the threshing short culm chain 9a side while automatically adjusting
8 are arranged and configured.

As shown in FIG. 11, there is provided a controller 59 which is mainly provided with a CPU and performs arithmetic control of an automatic circuit, and the input side of the controller 59 is connected to the raising speed sensor 4a via an input interface 59a. , Handling depth detection sensor 51, handling depth position sensor 52, cutting height sensor 5
3, a culm length sensor 54, left and right grain culm sensors 55 in front, a grain culm sensor rear 56, a mode changeover switch 5, a handling depth control switch 57, a ridge control switch 58, and the like are connected to each other.

A depth adjustment relay 60a for driving the depth adjustment motor 45 to the depth side via the output interface 59b to the output side of the controller 59 and a shallow depth adjustment for driving to the shallow side. A relay 60b and a supply adjusting relay 61 for driving the supply adjusting motor 47 toward the threshing short culm chain 9a are connected to each other. FIG.
As shown in FIG. 1, an input shaft 6 as a first shaft is used as a gear transmission mechanism of a traveling transmission case 1 as a traveling transmission.
Second, the low-speed drive gear 63 and the medium-speed drive gear 64 for switching the vehicle speed are each rotated around the shaft, and the low-speed gear 65 and the medium-speed gear 66 that always mesh with the two drive gears 63 and 64, respectively.
A shaft shift pawl clutch 68 for switching and meshing and connecting the gears 65 and 66 is disposed at an intermediate position between the transmission shaft 67 serving as a shaft so as to be able to slide leftward and rightward, thereby forming a subtransmission. .

The transmission gear 6 that rotates about the transmission shaft 67.
9 and a dual steering center gear 72 meshed with the transmission intermediate gear 70 to rotate as a third intermediate shaft 71 as a third shaft. The steering shaft 73 is configured to rotate. The steering shaft 7
The left and right steering gears 74 are idled on both sides of the steering center gear 72 which rotates in the direction of 3, and are brought into contact with the outer surfaces of the left and right steering gears 74 by a spring and a pressing force such as hydraulic pressure. Left and right steering clutches 75 and left and right traveling brakes 7 for applying a braking force by disengaging the steering clutch 75.
6 are connected to each other, and the brakes are turned left and right by these actions.

A mild revolving gear 77 meshing with one of the small diameter gears 70a of the two transmission intermediate gears 70 and a spin revolving gear 78 meshing with one of the small diameter gears 72a of the double steering center gear 72 are shown in FIG. A shaft is rotated on the left and right sides of a rotation switching shaft 79 as a shaft, and between the mild rotation gear 77 and the spin rotation gear 78, both gears 77 and 78 are switched to form a gear on the outer periphery for rotating the shaft. The turning switching gear 80 as a provided clutch is configured so as to be meshable and connectable by sliding left and right.

A turning center gear 81 meshing with the outer peripheral gear of the turning switching gear 80 is connected to a turning shaft 82 as a fifth shaft.
The left and right steering gears 74 are in contact with the left and right side surfaces of the revolving center gear 81, and the left and right steering gears 74 are engaged with the left and right steering gears 74. Left and right swing clutches 84 which contact the outer surfaces of the gears 83 to rotate the gears 83 by the action of hydraulic pressure or the like.
Are connected to each other to perform a mild turning and a spin turning to the left and right sides by these actions.

One end of a left and right reduction shaft 86 serving as a sixth shaft provided on the left and right sides with left and right reduction gears 85 respectively engaged with one of the small diameter gears 83a of the two left and right steering driven gears 83. The left and right axle gears 88, which mesh with the small reduction gears 87, respectively, are provided on the left and right as a seventh shaft. The traveling crawler 7 is driven by left and right driving wheels 90 each fixed to one end of the axle 89 and each fixed to the other end.

On one side of the operating device 18, there is provided a main shift lever 91 having a mode changeover switch 5 provided on a handle portion, for switching between forward and backward movements of the vehicle body 22 and shifting the vehicle speed.
And a sub-shift lever 92 for switching the sub-shift, and a power steering lever 93 for controlling left and right steering and turning, respectively, are engaged with one end of the transmission shaft 67 on the outer wall of the transmission case 1. Speed sensor 94 for detecting vehicle speed
And the vehicle speed sensor 94 is connected to the input side of the controller 59.

The weed body 13 is brought close to the soil surface, the car body 22 is advanced by the traveling device 8 and the uncut grain culm is cut by the cutting device 2, and at the time of cutting, one strip at the center and two strips on the left and right sides are cut. Left, middle and right raising sections 3
At the same time, the root side is squeezed by each of the left, middle and right rake belts 41, and the raked root side is pinched by each of the rake star wheels 42 and the cutting blade The mowing is performed by the unit 14.

The roots of the cut culms are collected and conveyed by the conveyer chains 43 of the left, middle, and right concentrators, and the handling depth adjusting chain 44 is conveyed from the confluence. The feed is transferred to the feeding and supply chain 48 to feed and feed the threshing apparatus 12 while adjusting the handling depth, and the tip side is collected by the tip transfer lugs 46 of the left, middle, and right tip collecting sections. The right ear tip transport lug 46c is merged with the intermediate position, and from this junction, the right ear tip transport lug 46c is further fed to the threshing apparatus 12 by the right ear tip transport lug 46c.

When the grain culm is transported and supplied to the threshing device 12, first, the handling depth detection sensor 5 in the transport adjusting unit 15
According to the detected value of 1, the handling depth adjusting motor 45 is driven according to the culm length of the grain culm to adjust the handling depth adjusting chain 44 to an appropriate handling depth. When it is detected, the supply adjusting motor 47 is driven in the transport supply unit 16 to slide and adjust the transport supply chain 48 toward the threshing short culm chain 9a.

At the time of the mowing operation in the mowing device 2, the vehicle speed is detected by the vehicle speed sensor 94, and the wake-up speed with respect to the vehicle speed is synchronized with the continuously variable transmission 4. Switching to mode D is performed. In the lodging mode D, as shown in the diagram of FIG. 1, the ratio of the starting speed / vehicle speed when the vehicle speed is low L is made larger than the ratio of the starting speed / vehicle speed when the vehicle speed is medium speed M. However, even if the vehicle speed changes from the medium speed M to the low speed L, the wake-up speed does not decrease so much.
The elevating function can be performed properly while maintaining the elevating performance well.

In both the standard mode S and the lying mode D, the raising speed is regulated by providing a constant upper limit line Z on the high speed side when the vehicle speed is medium speed M and low speed L. Thereby, the noise and the loss of powder can be improved. Further, as described above, the vehicle has the vehicle speed sensor 94 for detecting the vehicle speed and the rising speed sensor 4a for detecting the rising speed, and the rising speed at which the continuously variable transmission 4 continuously changes the speed in accordance with the detected value of the vehicle speed. , The vehicle speed is changed to a low speed L, a medium speed M, and a high speed H, as shown in the diagram of FIG. Regardless of the number of stages, the standard mode S and the lodging mode D are each a two-system program,
Control is performed to achieve each speed change line by the mechanical limitation of the continuously variable transmission 4.

As described above, the standard mode S and the lodging mode D
Since each of the programs is a simple two-system program, it is not necessary to switch the program every time the vehicle speed is changed, thereby reducing the number of problems. Since the speed can be selected, reliability is improved. Further, as described above, the vehicle has the vehicle speed sensor 94 for detecting the vehicle speed and the rising speed sensor 4a for detecting the rising speed, and the rising speed at which the continuously variable transmission 4 continuously changes the speed in accordance with the detected value of the vehicle speed. , A plurality of wake-up modes are set, and a vehicle speed change is set to at least a middle speed M and a high speed H.
As shown in the diagram of FIG. 3, the raising speed corresponding to the set upper limit speed of the middle speed M is raised, and the raising speed is synchronized up to the line where the upper limit speed of the middle speed M exceeds the predetermined amount α. Speed, and control is performed so as to maintain the elevating speed at a constant level for a vehicle speed higher than that.

As described above, by determining the control line of the wake-up speed in consideration of the set upper limit speed of the vehicle speed plus α,
2. Description of the Related Art Conventionally, many engines have a margin above a rated value, and when a vehicle is not considered above the rated value (set upper limit speed), for example, at a vehicle speed exceeding a rated value of a medium speed M, Since it is possible to prevent the phenomenon that the run-up speed runs away, stable harvesting work becomes possible,
This is advantageous in terms of vibration, noise, and durability. (Predetermined amount α
Has a vehicle speed sensor 94 for detecting the vehicle speed and a rising speed sensor 4a for detecting the rising speed, as described above, and the continuously variable transmission 4 according to the detected value of the vehicle speed. , The starting speed at which the stepless speed change is performed is set to a plurality of starting modes, and the vehicle speed is set to a plurality of speeds such as a low speed L and a medium speed M. As shown in FIG. 95, a program line for increasing the ratio of the wake-up speed / vehicle speed as the vehicle speed is lower L according to the combination of the wake-up mode and the shift speed, as shown in the diagram of FIG. Control is performed so as to change.

As described above, since the low speed L and the medium speed M of the vehicle speed can be accurately detected and the control line corresponding to the detection can be executed, the mechanical part is broken down as compared with the system in which the regulation is performed mechanically. However, runaway or the like is unlikely to occur, and a stable wake-up speed can be obtained. Further, in the reaper 2, the left and right scraping star wheels 42 a, 42 in the transport adjusting section 15 are provided.
Left and right stock transfer chains 43 arranged in an inverted octagon from c
The leading end of the handling depth adjusting chain 44 is provided at the lower part where the a and 43c converge, and the terminal end thereof is arranged below the transport supply chain 48 in the transport supplying unit 16. As shown in FIG. 5, as shown in FIG. 5, the reference numeral 44 is arranged at the positions of the angles θ1 and θ2 formed by the left and right stock transfer chains 43a and 43c and the transfer supply chain 48, respectively.

With this configuration, the culm transported by the mowing device 2 is slightly inclined by being taken over from the stock transport chain 43 to the handling depth adjusting chain 44, and further transported from the handling depth adjusting chain 44. By taking over the supply chain 48 and making it inclined deeply, it is possible to transfer the threshing device 12 to the feed chain 9 by gradually inclining the posture by utilizing the change of the grain culm. There is no turbulence, and it is possible to transport cereals with less disturbance.

As shown in FIG. 6, the cutting input pulley 25 which is fixed to a cutting input shaft 26 which is supported by a cutting input case 24 of the cutting stand 23 and an input of the traveling transmission case 1 in the cutting device 2. A cutting belt 97 is provided between a cutting drive pulley 96 fixed to the shaft 62 so as to be freely inserted and cut by a tension pulley 98 for a clutch, and the pulley 98 is automatically cut and cut according to a lifting operation of the cutting device 2. It is possible to enter.

A belt stopper 99 is provided on the outer periphery of the cutting drive pulley 96, and a side surface of the cutting stand 23 is
A belt holding member 100 for holding the cutting belt 97 when the clutch tension pulley 98 is turned off is provided. Thus, by holding the cutting belt 97 by the simple belt holding member 100 when the clutch tension pulley 98 is disengaged, there is no member for restricting the cutting belt 97 on the cutting input pulley 25 side as in the related art. Can be prevented. As another means, a belt stopper surrounding the outer periphery of the pulley may be provided on the cutting input pulley 25 side. However, in this case, the shape becomes large, which is disadvantageous in terms of accuracy and cost.

Further, pitching and rolling control as a vehicle body horizontal control in the traveling device 8 are performed.
The structure of the raising / lowering control for raising the height will be described only for one side with respect to left and right symmetry. As shown in FIG. 13, an intermediate portion of a front rolling arm 102a is pivotally supported by a rolling metal 101 fixed to a front lower surface of the chassis 6, and a pitching arm 1 is fixed to a pitching metal 103 fixed to a rear lower surface.
An end portion of the connecting arm 104 is pivotally supported, and an intermediate portion thereof is connected to an end portion of the connecting arm 105 having an H-shape in plan view by pin connection.

A crawler frame 1 that supports the intermediate portion of the rear rolling arm 102b at the other end of the connecting arm 105 and the lower ends of the front and rear rolling arms 102a and 102b supports the traveling crawler 7.
06 is connected to the front and rear sides by pins, and the upper end of the pitching arm 104 is connected to the piston tip of a single hydraulically driven pitching cylinder 107 provided on the upper surface of the chassis 6 by pin connection.

The upper end of the front rolling arm 102a and the middle of the rear rolling arm 102b are
8 and the rear rolling arm 10
The upper end of 2b is pin-connected to the tip of a piston of a hydraulically driven rolling cylinder 109 provided near the lower surface of the chassis 6. A rear wheel 110 provided on the crawler frame 106, a plurality of ground wheels 111, and a driving wheel 90 fixed to an axle 89 extending from the traveling transmission case 1.
And the traveling crawler 7 is stretched.

With this configuration, pitching control is performed by the action of the pitching arm 104 and the rear rolling arm 102b and the pitching cylinder 107, and rolling control is performed by the action of the front and rear rolling arms 102a and 102b and the rolling cylinder 109. Let it do. The front and rear rolling arms 102
The stroke sensor 11 detects the stroke of the rolling arm 102 as means for detecting the vehicle height position by relatively lowering the vehicle body 22 by simultaneously rotating the a and b downward by the rolling cylinder 109.
2 is provided.

When a very short culm of a grain culm is detected by the culm length sensor 54 at the time of ridge cutting when performing high cutting at a ridge or the like, the handling depth adjustment chain 44 is adjusted to a predetermined depth by the handling depth adjusting chain 44. As shown in FIG. 14, the position of the cutting height reference value β of the high cutting by the cutting height sensor 53 for detecting the cutting height is lowered with respect to the chassis 6 when the vehicle height position is high. However, when the vehicle height position is the low position, the control can be performed so that the height can be changed to be higher than the chassis 6.

As described above, by changing the position of the cutting height reference value β with respect to the chassis 6 according to the height / low of the vehicle height position, as in the conventional case, when the vehicle height position is, for example, a low position, In the case where the cutting height reference value β is set, when the vehicle height position is the high position, the cutting is higher, and the handling depth adjusting chain 4
Since there is a danger of remaining unhandled due to shallow handling that deviates from the adjustment range of 4, the position of the cutting height reference value β can be maintained uniformly regardless of the vehicle height position. Appropriate ridge cutting control can be performed.

When the wetland switch 113 is turned on during operation in the wetland state, the main shift lever 91 is turned off.
When the reverse operation is detected, the pitching cylinder 107
To raise the front part of the vehicle body 22 by a rearward tilting action,
When the mowing device 2 and the feed chain 9 are stopped when a certain rising position of the mowing device 2 is detected by the mowing height sensor 53, as shown in FIG. At times, the cutting height reference value γ of the cutting height sensor 53 can be changed and controlled with respect to the chassis 6.

As described above, in the wetland, the cutting height reference value γ can be changed with respect to the undercarriage 6 in accordance with the cutting height position that is changed by turning the wetland switch 113 ON and OFF. When the mowing is performed with the same mowing height reference value γ even when the mowing height is low with respect to the soil surface when the mooring 22 is settled, the mowing pad switch 113 is turned on by turning the mowing pad switch 113 off. By
Since the cutting height reference value γ is changed with respect to the undercarriage 6 simultaneously with the control of the vehicle body 22, the cutting height can be kept uniform, so that the required function can be achieved by a single operation.

[Brief description of the drawings]

FIG. 1 is a diagram showing the ratio of each raising speed to low and medium vehicle speeds in a reaper.

FIG. 2 shows each of the triggering speeds for low, medium, and high vehicle speeds.
Diagram showing the program of the system.

FIG. 3 is a diagram showing a state in which the vehicle speed is raised when the vehicle speed exceeds a middle speed upper limit speed and the speed is maintained in a certain range.

FIG. 4 is a side view showing an arrangement state of a shift switch for detecting a middle speed and a low speed of a vehicle speed.

FIG. 5 is a rear view showing a takeover inclination angle of each transport chain that clamps the transporting grain culm of the reaper.

FIG. 6 is a side view showing a state in which the belt holding member is arranged on the turret when the reaping belt is relaxed.

FIG. 7 is a side view showing the entire configuration of the reaper.

FIG. 8 is a plan view showing the entire configuration of the reaper.

FIG. 9 is a block diagram showing a power transmission path of the reaper.

FIG. 10 is a schematic side view showing an arrangement state of sensors, motors and switches of the combine.

FIG. 11 is a block diagram showing an electric circuit related to automatic control in the reaper.

FIG. 12 is an exploded front view showing a gear transmission mechanism of the traveling transmission case.

FIG. 13 is a side view showing an elevating mechanism of a traveling crawler with respect to a chassis of the traveling device.

FIG. 14 is an operation diagram showing a state in which the same cutting height reference value is set regardless of the height of the vehicle height position.

FIG. 15 is an operation diagram showing a state in which a cutting height reference value is adjusted simultaneously with control of a vehicle body in a wet field.

FIG. 16 is a side view showing the overall configuration of the combine.

[Explanation of symbols]

 1. Transmission for traveling 2. Reaper 3. Raising part 4. Continuously variable transmission 5. Mode switching means S. Standard mode D. Lodging mode Medium speed L. Low speed

 ────────────────────────────────────────────────── ─── Continuing from the front page (72) Inventor Shingo Takagi 1-Family, Yagura-cho, Tobe-cho, Iyo-gun, Ehime Pref. BB05 CC11 DD58

Claims (1)

[Claims] 1. A continuously variable transmission 4 that raises and changes the speed according to a slower vehicle speed on a path that transmits power from a traveling transmission 1 to a raising portion 3 of a mowing device 2; A mode switching unit 5 for setting a plurality of raising speeds such as a standard mode S and a lying mode D in accordance with the posture;
When the vehicle speed is set to two or more steps such as the medium speed M and the low speed L during the work, the ratio of the raising speed to the vehicle speed at the time of switching to the lying mode D is lower than the medium speed M.
A harvesting transmission device such as a combine that performs control so that the time is greater.