JP2003189727A - Controller for reaper of combine harvester - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To solve problems that malfunction is caused when weeds and long culms, or the like, are nipped and a grain culm nipping and transferring apparatus 9 is kept in a stopped state by detection thereof with a culm length sensor apparatus by simultaneously carrying out starting control of threshing depth regulating operation though a reaper 3 and a feed chain of a thresher are subjected to automatic stop control when the reaper is operated to a higher position at a prescribed level and the culm length of the grain culms is detected with the culm length sensor to simultaneously perform threshing depth regulation of the grain culms simultaneously with beginning of start of the reaper and feed chain when the reaper is reoperated to lowering to the position (usual reaping operation height) at the prescribed level. <P>SOLUTION: This controller for the reaper of the combine harvester is composed so as to reperform control over lowering of the reaper 3 by lifting operation of the reaper 3 to the higher position at the prescribed level after automatically stopping the reaper 3 and the feed chain 5 of a thresher 4 and start and control the starting time of regulating operation of the grain culm nipping and transferring apparatus 9 for regulating the threshing depth according to the culm length of the grain culms after a delay of a prescribed time (T) or after traveling a prescribed distance (L) when the reaping operation is started. <P>COPYRIGHT: (C)2003,JPO

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention, when the reaper is raised to a predetermined high position, the reaper and the feed chain for holding and transferring the grain culms of the thresher are automatically stopped again after the automatic stop control. When the reaper is controlled to descend and the reaping work is controlled to start, start the adjustment operation of the grain-culling holding and transferring device for adjusting the handling depth of the grain culm after a predetermined time delay or after traveling for a predetermined distance. It is a technology for controlling the harvesting and can be used as a combine harvester control device.

[0002]

2. Description of the Related Art A mowing and harvesting work for a napped culm with a combine harvester is carried out by a scraping device of a reaper provided in a front part of a traveling carriage to scrape the napped culm and a mowing blade device to mow the culm. Is taken over by the grain culm holding and transferring device and is transferred to the upper rear part.The culm length sensor device detects the culm length of the culm during this transfer, and based on this culm length detection, when the handling depth position is not appropriate, The culm-carrying and transferring device is rotated around the rear part as the center of rotation, and the front part is rotated upwards or downwards, the movement is controlled to the optimum depth position for the culm length of the grain culm, and the grain is supplied to the thresher. Of the feed chain and the holding rod, the grains are threshed while being held and transferred in the threshing machine, and the grains that have been threshed and sorted are supplied to and temporarily stored in the grain storage tank.

During the cutting and harvesting work of the above grain culms,
When making a turn to the adjacent line at the end of the mowing strip, usually the mowing machine is lifted to a predetermined height position to make a swing. Based on this lifting operation, the feed of the mowing machine and the thresher is increased. The chain is automatically stopped, and both are turned in the automatically stopped state. When the turning is completed and the adjoining line is entered, when the reaper is lowered to the normal reaping height position, the reaper and the feed chain of the thresher are immediately driven to rotate, At the same time, the control for starting the handling depth adjusting operation for adjusting the handling depth of the grain-crop holding and transferring device of the reaper is also started, and the cutting and harvesting work of the entered row is performed.

[0004]

When the grain culm is being mowed and harvested, when turning to the adjacent strip, the reaper is turned up to a predetermined height position and turned. The reaper and the feed chain of the thresher are in the automatic stop state, both of which turn in the automatic stop state,
When the slewing is completed and the adjoining line is entered, when the reaper is lowered to the normal reaping height position, the reaper and the feed chain are immediately driven to rotate,
At the same time, the start control of the handling depth adjustment operation of the grain culling carrier transfer device that can rotate up and down freely of the reaper is also immediately started, so that in the grain culm that is stopped in the holding state to this grain culm carrier transfer device,
When the culm length sensor device detects a weed or a long culm that is partially held, a malfunction may occur, or a spill of a grain culm may occur. It tries to solve the problem.

[0005]

To this end, according to the invention as set forth in claim 1, the present invention provides a reaper 3 on the front side of the traveling chassis 2, which is movable up and down for cutting grain culms, and a reaper. The feed chain 5 of the threshing machine 4 that receives and feeds the grain culm and transfers it, the holding rod 6, and the threshing chamber 7 that threshes the grain culm during the holding transfer to the threshing chamber 7 and the threshing chamber 7. A culm length sensor device 8 for detecting the culm length of the supplied grain culm, and a vertically movable culm holding and conveying device 9 for adjusting the supply depth of the grain culm based on the culm length detected by the culm length sensor device 8 and the like. In the combine provided to automatically stop the operation of the reaper 3 and the feed chain 5 based on the raising operation of the reaper 3 to a predetermined high position, the reaper 3 is moved to the predetermined height position. The raising machine control automatically stops the reaper 3 and the feed chain 5. After your, when again reaper 3 is controlled descent, cutting work is started controlled,
The combine harvester control device is characterized in that a control device 10 is provided to delay the start time of the handling depth adjusting operation of the grain-culling holding and transferring device 9 by a predetermined time (T).

In the harvesting and harvesting work of the napped culms with the combine harvester, the napped culms are raked by the scraping device of the reaper 3 provided in the front part of the traveling chassis 2 and cut by the cutting blade device to be cut by the shaving culms. Is taken over by the grain culm holding and transferring device 9 and transferred to the upper rear part, and during this transfer, the culm length sensor device 8 detects the culm length of the grain culm, and based on this culm length detection, when the handling depth position is not appropriate, , The culm holding and transferring device 9 is rotated upward or downward with the rear part as the center of rotation, and the front part is controlled to move to the optimum handling depth position for the culm length of the culm and supplied to the thresher 4, Feed chain 5 of this threshing machine 4
And the threshing rod is taken over and threshed while being held and transferred in the threshing machine 4, and the threshed and sorted grain is supplied to the grain storage tank and temporarily stored.

During the harvesting and harvesting work of the above grain culms,
When making a turn to the adjacent line at the terminal end of the mowing strip, usually the mowing machine 3 is lifted to a predetermined high position and swung, and based on this lifting operation, the mowing machine 3 is moved.
And the feed chain 5 of the threshing machine 4 are automatically stopped, and both of them are turned in the automatically stopped state. When the turning is completed and the adjacent line is entered, when the reaper 3 is lowered to the normal reaping height position, the reaper 3 and
The feed chain 5 of the threshing machine 4 is instantly driven to rotate, and the grain culm holding and transferring device 9 of the reaper 3 is vertically rotated according to the culm length of the grain culm to adjust the handling depth. The control for starting the operation is controlled by the control device 10 to delay the predetermined time (T), and after the predetermined time (T) has elapsed,
The cutting depth adjustment control is performed by the grain length of the grain culm, and the cutting and harvesting work of the grain culm of the entering row is performed.

According to the second aspect of the present invention, when the reaper 3 and the feed chain 5 are controlled to be automatically stopped by raising the reaper 3 to a predetermined high position,
When the reaper 3 is again lowered and the reaping work is started and controlled, the control for starting the depth adjustment operation of the grain-and-penetrating-and-holding transfer device 9 is started after the traveling for a predetermined distance (L). The harvester control device for a combine according to claim 1, wherein:

When the grain culm is being harvested and harvested, when turning to the adjacent line at the end of the cutting line, the reaper 3 is usually lifted to a predetermined high position for turning. Based on this raising operation, the reaper 3 and the feed chain 5 of the threshing machine 4 are automatically stopped, and both are turned in the automatically stopped state. The turn is over,
When the reaper 3 is moved down to the normal reaping height position when it enters the adjacent line, the reaper 3 and the feed chain 5 of the threshing machine 4 are immediately driven to rotate and the reaper 3 The control for rotating the grain culm holding and transferring device 9 up and down according to the culm length of the grain culm to start the handling depth adjusting operation for adjusting the handling depth is performed by the combine traveling a predetermined distance (L) and performing the harvesting and harvesting work. After this predetermined distance (L), the control device 10 controls the depth of treatment by the culm length of the grain culm, and the harvesting work of the grain culm of the entered row is performed.

[0010]

According to the first aspect of the present invention, when the combine harvester is turned, the harvester 3 and the feed chain 5 of the thresher 4 are operated by raising the harvester 3 to a predetermined high position. Etc. are automatically stopped, and when turning is completed, when the descending operation is performed to the normal cutting height position, the reaper 3 and the feed chain 5 of the threshing machine 4 are immediately driven to rotate, and the grain of the reaper 3 is The culm-carrying and transferring device 9 is rotated up and down according to the culm length of the grain culm, and the control for starting the handling depth adjusting operation for adjusting the handling depth is performed by the control device 10 so as to delay the predetermined time (T). After the time (T) has elapsed, the treatment depth adjustment control by the culm length of the grain culm is started,
For this reason, when the grain-carrying and transferring device 9 is in a stopped state,
Although the culm length sensor device 8 sometimes detected malfunctions such as weeds that were being held or long culms that were partially held, this malfunction can be prevented.

According to the second aspect of the present invention, the control for starting the handling depth adjusting operation for adjusting the handling depth by vertically rotating the grain-carrying and conveying device 9 according to the culm length of the grain culm,
By changing the control to the normal cutting height again, and after the combine has traveled for a predetermined distance (L), the handling depth adjusting operation of this grain-and-penetrating-and-conveying device 9 is controlled to start, so that in the case of distance, in the case of time. As a result, the re-starting accuracy is improved, and malfunctions can be prevented more reliably.

[0012]

BEST MODE FOR CARRYING OUT THE INVENTION An embodiment of the present invention will be described below with reference to the drawings. On the front side of the traveling chassis 2 of the combine 1, a mowing machine 3 for mowing the vertical grain culms, which is vertically rotatable, is provided.
The feed chain 5 of the threshing machine 4 that receives and feeds the cut grain culm, and the threshing rod 6, and the threshing chamber 7 of the threshing machine 4 that threshes the grain culm during the gripping transfer are provided, and the grain length of the grain culm is set. Based on the culm length sensor device 8 for detecting and the culm length detected by the culm length sensor device 8, while holding and transferring the grain culm,
This is a configuration in which a grain culling holding and transferring device 9 and the like for changing the holding position of the grain culm to adjust the handling depth are provided. In addition, the control device 10 is provided to start and control the handling depth adjusting operation for adjusting the handling depth by rotating the grain-carrying and conveying device 9 up and down.
Based on the detection of the culm length of the grain culm detected by the culm length sensor device 8, the control of the grain culm holding and transferring device 9 will be mainly illustrated and described.

Below the traveling chassis 2 of the combine 1, as shown in FIG. 8, a traveling device 11 in which a pair of left and right traveling crawlers 11a traveling on the soil surface are stretched is arranged, and on the upper side of the traveling chassis 2. Is a configuration in which the thresher 4 is placed. The mowing machine 3 on the front side of the traveling chassis 2 cuts the napped culms, which are transferred to the upper rear part by the reaping machine 3 and taken over by the feed chain 5 and the gripping rod 6 of the threshing machine 4. ,
Threshing is carried while being held and transferred in the threshing chamber 7 of the threshing machine 4. As shown in FIG. 1, the feed chain 5 is rotationally driven by the rotation of the feed chain motor 5a via the transmission device 5b and the transmission mechanism 5d in the chain gear case 5c. The grains that have been threshed and have been sorted are temporarily stored in the grain storage tank 12 arranged on the right side of the threshing machine 4.

On the front side of the traveling chassis 2, as shown in FIGS.
And as shown in FIG. 8, a narrow guide 13a for separating the napped culm from the front end position, a weeding body 13b, a raising device 14a for raising the napped culm, and a scraping device 15 for scraping the raised culm. , A cutting blade device 14b for cutting the scraped grain culm
And a reared part for holding and transferring the cut grain culm and transferring it to the feed chain 5 of the threshing machine 4 and the holding rod 6, the front part of which is a vertically movable pivoting device. The reaper 3 is provided with the root / ear tip transfer devices 16 and 17 that form the culm and the culm length sensor device 8 that detects the culm length of the grain culm being held and transported by the grain culm holding and transporting device 9. The reaper 3
Is configured to move up and down freely with respect to the soil surface by a telescopic cylinder 18 driven by hydraulic pressure.

A support pipe rod 19b is provided in the left-right direction at the upper end of a support rod 19a inclined from the lower front portion to the upper rear portion of the reaper 3, and the support pipe rod 19b is provided on the upper side surface of the traveling chassis 2. The reaper 3 is rotatably supported by a support device 19c, and when the telescopic cylinder 18 is operated, the reaper 3 is vertically rotated about the support pipe rod 19b.

The front part of the threshing machine 4 is shown in FIGS.
Start the combine 1 as shown in FIGS. 4, 5 and 8.
Operation device 20a for performing operations such as stopping and adjusting each part
And a driver's seat 20b on which an operator who performs these operations is installed. The engine 21 is mounted on the upper side surface of the traveling chassis 2 below the driver's seat 20b, and at the rear portion,
A grain storage tank 12 is provided. These traveling devices 2,
The harvester 3, the thresher 4, the engine 21, and the like form a machine body 1a of the combine 1.

In the grain culm transfer path formed by the grain culm holding and transferring device 9 of the reaper 3, the grain culm to be cut and transferred is brought into contact with the grain culm to be supplied to the thresher 4. This is a configuration in which a grain culm sensor 3a for detecting the presence or absence is provided. In the transmission path of the transmission mechanism 22b in the traveling mission case 22 mounted on the front end of the traveling chassis 2,
A potentiometer type vehicle speed sensor 22a for detecting the traveling vehicle speed based on the output is provided.

The culm length sensor device 8 is shown in FIGS.
As shown in FIG. 5, the grain-and-culm-carrying transfer device 19 is configured to include long / short culm sensors 8a and 8b for detecting the culm length of the grain-culm during gripping and transferring from the lower front to the upper rear. The sensors 8a, 8b are long / short culm actuators 23a,
23c and these long / short culm actuators 23a, 23
When c is pushed by the grain culm and rotates, ON-OF
ON / OFF switch type long / short culvert switch 2
3b, 23d and the like. When both the long / short culm switches 23b and 23d are turned on, the grain culm being transferred is detected to be long culm. The long culm switch 23b is OFF and the short culm switch 23d is ON, so that the grain culm being transferred is detected to have a standard culm length. Further, both of the long / short culm switches 23b and 23d are turned off, so that the grain culm being transferred is detected as a short culm.

As shown in FIGS. 1 and 2, the root and tip transfer devices 16 and 17 of the grain-culling holding and transferring device 9 are provided with a turning tool 24 at the upper end of the grain-culling holding and transferring device 9. By rotating the supply adjusting motor 24a in the forward and reverse directions with the rotating tool 24 as the center of rotation, the front parts of the root and tip transfer devices 16 and 17 of the grain-culling holding and transfer device 9 are vertically moved through the rotating tool 24. It is a configuration in which the picking device 15 changes the holding position of the grain culms to be taken over, and the handling depth of the grain culms to be supplied into the threshing chamber 7 of the threshing machine 4 can be adjusted. is there. When the culm length of the grain culm is long culm, the front part is rotated and adjusted upward, when the culm is short culm, it is rotated and adjusted downward, and when the culm length is normal, the current state is maintained. These rotational movement adjustments are configured to be performed based on the detection of the culm length of the grain culm detected by the grain culm sensor device 8.

The root transfer device 16 comprises a substantially triangular chain case 16a, a root chain 16b, a root holding rod (not shown) and the like. Further, the tip transfer device 17 is configured by a substantially triangular chain case 17a, a chain tip 17c having the tip lugs 17b mounted at predetermined intervals, and the like.

When the reaper 3 is operated to a predetermined high position, the telescopic cylinder 18 for moving the reaper 3 up and down is started, and the telescopic cylinder 18 is extended for a predetermined time. The extension time is input from the entrance circuit 10a of the control device 10 to the CPU 10b, and the input causes the reaper 3 to detect that the reaper 3 has been lifted to a predetermined high position.

Along with the detection of the elevation to the high position, the tension pulley 3c for turning on / off the reaping input pulley 3b for rotatably driving the reaper 3 through the output circuit 10c from the CPU 10b. Is turned off, the rotation of the reaping input pulley 3b is stopped and controlled, the reaper 3 is automatically stopped, and the feed chain motor 5a that rotationally drives the feed chain 5 of the threshing machine 4 is automatically stopped. The feed chain 5 is controlled to automatically stop. The operation of the reaper 3 to a predetermined high position is mainly performed at the time of turning by changing the reaping strip.

When the reaper 3 has a predetermined high position,
The telescopic cylinder 1 that moves the reaper 3 up and down when it is operated to the reaping height position for reaping a normal grain culm.
8 is started and the expansion / contraction cylinder 18 is contracted for a predetermined time, the contraction time is input from the input circuit 10a of the control device 10 to the CPU 10b.
The reaper 3 is configured to detect that the reaper has been lowered to a cutting height position for cutting a normal grain culm.

Upon detection of the lowering to the cutting height position for cutting the normal grain culm, the CPU 10b outputs the cutting circuit 3c through the output circuit 10c to turn on the cutting input pulley 3b.・ Tension pulley 3c that turns off
Is turned on, the reaping input pulley 3b is rotationally controlled, the reaper 3 is automatically controlled, and the feed chain motor 5a rotatively driving the feed chain 5 of the threshing machine 4 is rotationally controlled. The feed chain 5 is automatically rotated. The reaper 3 and the feed chain 5 are configured to be driven to rotate at the same time, but the long / short culm sensors 8a and 8b of the culm length sensor device 8 detect the long culm or the short culm of the culm length of the grain culm. However, this detection is input to the CPU 10b via the input circuit 10a of the control device 10, and the output based on this input is not immediately output but is output with a time lag. In other words, after a predetermined time (T) has passed, the CPU 10b uses the long culm or short culm detection result of the grain culm detected by the long / short culm sensors 8a and 8b.
From the output circuit 10c to the start output of the handling depth adjusting operation of the grain-culling holding and transferring device 9, which is delay-controlled for a predetermined time (T) and is output.

Based on the input of the detection of the long culm or the short culm of the culm length of the grain culm, the root / head transfer device 16, 1 of the grain culm holding and transferring device 9 is output from the CPU 10b through the output circuit 10c.
The supply adjustment motor 24a for rotationally moving the handle 7 to the deep handle side or the shallow handle side is rotationally controlled, and the output of the start of the handle depth adjusting operation is output by the control device 10 after a lapse of a predetermined time (T). CP
Supply adjustment motor 2 from U10b through output circuit 10c
4a, the supply adjusting motor 24a rotates forward,
Alternatively, it is controlled to rotate in the reverse direction, and the root and tip transfer devices 16 and 17
Is a configuration in which rotational movement is controlled so that the gripping position of the grain culm is held between the upper shallow handling side and the lower deep handling side.

After raising and lowering the root and tip transfer devices 16 and 17 of the grain-clamping and conveying device 9 of the reaper 3 to a predetermined high position, the cutting device is again changed to a mowing height position for cutting a normal grain stalk. When controlled, the postures of the tips of the culms held by the root and tip transfer devices 16 and 17 are changed to the ascending position, and the long / short culm sensors 8a and 8b of the culm length sensor device 8 are activated. When the cutting depth is lowered to the normal cutting height position as it is, the cutting depth adjustment operation may be started immediately, which may result in false detection and malfunction. , If there is a weed that has been held or a long culm that is partly held, it may cause a false detection, resulting in a malfunction. By delaying the start output of the adjustment operation, It is possible to prevent malfunction.

Further, when the reaper 3 is operated from a predetermined high position to a reaping height position for reaping normal grain culms, the reaper 3 and the thresher were automatically stopped and controlled. Although the feed chain 5 of No. 4 is also driven to rotate at the same time, even if the long / short culm sensors 8a, 8b of the culm length sensor device 8 detect the long culm or the short culm of the culm length of the grain culm, this detection Via the input circuit of the control device 10
The input based on this input to U10b is not immediately output, but is output with a time lag. That is, after the combine 1 has traveled a predetermined distance (L), the CPU 10c outputs the output circuit 10c according to the detection result of the long culm or the short culm of the grain culm detected by the long / short culm sensors 8a and 8b.
After that, the start output of the handling depth adjusting operation of the grain-carrying and transferring device 9 is output.

Based on the detection of the long culm or the short culm of the culm length of the grain culm, the CPU 10b passes the output circuit 10c to the root and tip transfer devices 16 and 17 of the grain culm holding and transferring device 9 on the deep side, Alternatively, by controlling the rotation of the supply adjusting motor 24a which is rotationally moved to the shallow handling side, the start output of the handling depth adjusting operation is
After traveling a predetermined distance (L), the CPU 10b of the control device 10
Is output to the supply adjusting motor 24a through the output circuit 10c, and the supply adjusting motor 24a is controlled to rotate normally or reversely, so that the root and tip transfer devices 16 and 17 move the gripping position of the grain stem to an upper shallow position. The rotation is controlled so as to hold the handle side or the deep handle side below.

After raising the height positions of the root and tip transfer devices 16 and 17 of the grain-crop holding and transfer device 9 of the reaper 3 to a predetermined position, it is changed again to a cutting height position at which normal grain stalks are mowed. When controlled, the combine 1 outputs the start output of the handling depth adjustment operation for adjusting the handling depth after traveling for the predetermined distance (L), so that the restart precision is improved more than in the case of time, and an erroneous operation is performed. The operation can be prevented more reliably.

At the rear side of the grain storage tank 12 for discharging the grains stored in the grain storage tank 12 to the outside of the machine,
A discharge support cylinder 25 having a vertical transfer spiral 25a installed therein is provided so as to be rotatable in a substantially vertical posture, and an upper end portion of the discharge support cylinder 25 has its entire length extending to the front and rear length of the combine 1 to the outside of the machine. The discharge auger 26 in which the discharge spiral 26a for discharging is retractably installed is arranged in the front-back direction so as to be expandable, contractible, vertically rotatable, and horizontally rotatable.

An operating device 20a is provided on the left side of the cockpit 20b as shown in FIGS. 4 and 5, and the thresher 4 is started on the left rear side of the clutch panel 27 of the operating device 20a. And threshing clutch lever 27 for stopping operation
In addition to the provision of “a”, the head portion of the threshing clutch lever 27a is provided with a mowing switch 27b for starting and stopping the mowing machine 3.

At the front part of the threshing clutch lever 27a, there is provided an auxiliary shift lever 28 for operating an auxiliary transmission device (not shown) provided in the mission case 22 as shown in FIG. 4, and the right side of the threshing clutch lever 27a. Switch panel 3 provided at the rear of the main transmission lever panel 29 provided at
0 is provided with a throttle lever 31 for operating the rotation speed of the engine 21.

As a result, the operation load of the throttle lever 31 is light and the throttle lever 31 can be shortened. Although it has the drawback that it is difficult to operate compared to a long lever, by arranging it near the operator,
This problem can be solved, and in the past, there was the throttle lever 31 on the front side of the main transmission lever 29a, and it was difficult to operate the throttle lever 31, but this could be solved. Further, by disposing the main transmission lever panel 29 on the clutch panel 27 to the right in the longitudinal direction, the clutch panel 27 is provided with the auxiliary transmission lever 28 on the front side and the threshing clutch lever 2 on the rear side.
By providing 7a, the space of the clutch panel 27 can be effectively used.

From the front part of the surface of the switch panel 30, as shown in FIGS. 4 and 5, the manual handling depth switch 32a for manually adjusting the handling depth of the grain and the handling depth of the grain are set. An automatic depth control switch 32b for automatically adjusting and controlling, a mowing direction switch 33a for controlling the mowing direction, and a mowing machine 3
And the feed chain 5 of the thresher 4 are provided with a mowing / de-slicing switch 33b for simultaneously starting and stopping the threshing machine 4.

As a result, when viewed from the side of the cockpit 20b, the switch panel 30 is arranged on the front side, and various switches 32a, 32 are provided on the surface of the switch panel 30.
b, 33a, 33b, etc. are provided, and the threshing clutch lever 27a is provided on the left side thereof, and the mowing switch 27b is provided on the head portion thereof. Since it is disposed at a high position, the operation is easy.

The traveling direction switching lever 34 for switching the traveling direction of the combine 1 is provided at the right end portion of the operating device 20a provided at the front portion of the cockpit 20b as shown in FIG. The head portion of the traveling direction switching lever 34 is provided with a cutting direction switch 34a that is operated when the cutting culms are detected by the reaper 3 and the cutting direction is automatically controlled.

As a result, the head portion of the traveling direction switching lever 34, which is constantly gripped by the operator, for switching the traveling direction of the combine 1, is provided with a cutting direction switch 34a which is operated when the cutting direction is automatically controlled. As a result, the operation of the cutting direction switch 34a is easy.
Also, during normal operation, the operator may
In many cases, the traveling operation is performed by grasping both the traveling direction switching lever 34 and the traveling direction switching lever 34.
It is easy to operate because it can be operated without releasing the hands from a and 34. Further, when the lamp is turned on when the cutting direction switch 34a is turned on, the operator can easily see the lamp.

FIG. 6 is a hydraulic circuit diagram centering on the mission case 22. A pipe 35a for sucking oil from the lower portion of the traveling mission 22 is provided, and a hydraulic pump 36b is connected to an end of the pipe 35a via a filter 36a. A switching valve 37a that is switched by a traveling direction switching lever 34 provided in the operating device 20a is connected to the downstream side of the hydraulic pump 36b, and further to the downstream side of the switching valve 37a, a telescopic cylinder 18 for moving the reaper 3 up and down. And the electromagnetic switching valve 37b are connected.

Further, the return pipe 35b from the telescopic cylinder 18 of the electromagnetic switching valve 37a is connected to the hydraulic continuously variable transmission 38 through the filter 38a, and this pipe 35b
A relief valve 39 is provided between the hydraulic pump 36b and the relief valve 39 for performing the relief operation when the telescopic cylinder 18 is operated.

The left / right side clutches 40a, 4a in the transmission case 22 are provided on the lower side of the electromagnetic switching valve 37b.
0b is connected to the left and right hydraulic cylinders 41a and 41b that operate the left and right brakes 40c and 40d.
The left and right link arms 42a and 42b for disengaging the left and right side clutches 40a and 40b are connected to the left and right piston arms 41c and 41d of the left and right hydraulic cylinders 41a and 41b.
It is a configuration in which is connected.

The left and right hydraulic cylinders 41a, 41b
Are connected to each other by a pipe 43a, a pipe 43b is connected to the right hydraulic cylinder 41b, and an end portion thereof is connected to a pipe 35b. Further, the relief valve 44 is provided on the pipe 43b.
Is provided. Since the return pipe 45a from the electromagnetic switching valve 37b is connected to the return pipe 35b from the switching valve 37a, the oil in the pipe 35b and the pipe 44a both flow into the hydraulic continuously variable transmission 38. is there.
The hydraulic pump 38b in the hydraulic continuously variable transmission 38 includes a transmission belt 21a, a hydraulic transmission pulley 46, and a transmission belt 21a.
a, the rotary shaft 46 rotates. The rotary shaft 46 is provided with a hydraulic continuously variable transmission 38 and a blower fan 46b for cooling the surroundings.

The hydraulic continuously variable transmission 38 has a pipe 45.
b is connected, and the end of the pipe 45b is connected to the upper part of the bypass transmission case 47. The pipe 45b receives the oil introduced from the pipe 35b into the hydraulic continuously variable transmission 38.
It is for returning to the inside of the mission case 22 and the pipe 3
The oil introduced into the hydraulic continuously variable transmission 38 from 5b is for replenishing the oil leaked from the closed circuit in the hydraulic continuously variable transmission 38.

When the engine 21 is started, power is transmitted to the rotary shaft 46 via the transmission belt 21a and the hydraulic speed change pulley 46a, and the rotation of the rotary shaft 46 causes the blower fan 46b to rotate and drive the hydraulic pressure. The continuously variable transmission 38 and the like are cooled. When the hydraulic pump 38b is rotated,
When the swash plate 38c of the hydraulic pump 38b is neutral, the rotational force of the hydraulic pump 38b is not transmitted to the hydraulic motor 48. Further, when the swash plate 38c is tilted to the forward rotation side, the hydraulic motor 48 rotates normally, and when the swash plate 38c is tilted to the reverse rotation side, the hydraulic motor 48 rotates reversely. The power transmitted to the hydraulic motor 48 is transferred to the detour transmission case 47.
The left and right traveling axles 49a and 49b, which pass through the transmission mechanism 47a inside and the transmission mechanism 22b inside the mission case 22 and are rotatably supported to the lowermost end portion of the mission case 22, are rotationally driven, and the traveling crawlers on both left and right sides are driven. The configuration is such that 11a, 11a are driven to rotate.

When the engine 21 is started, the hydraulic pump 36b that feeds oil into the hydraulic circuit also operates. Then, the oil in the mission case 22 is sucked out from the pipe 35a and sent to the switching valve 37a. This switching valve 3
7c does not operate, the switching valve 37a 37c
Is sent to the electromagnetic switching valve 37b via the pipe 50. When the traveling direction switching lever 34 is tilted rearward, the switching valve 37a switches to the 37d side, and the telescopic cylinder 18 is moved.
Sent to. In this case, since there is no place for oil to escape between the hydraulic pump 36b and the telescopic cylinder 18, the relief valve 39 operates and oil is sent from the pipe 35b into the hydraulic continuously variable transmission 38. .

When the traveling direction switching lever 34 is tilted forward, the switching valve 37a switches to the side 37e.
The reaper 3 moves down. In this case, the return oil from the telescopic cylinder 18 flows to the pipe 35b, and the hydraulic pump 3
Oil flows from 6b to the pipe 50. Then, when the traveling direction switching lever 34 is returned to the neutral position, the switching valve 37a moves to 37
Return to position c.

The oil flowing from the pipe 50 to the electromagnetic switching valve 37b is located at the position where the electromagnetic switching valve 37b is 51a, that is,
If not switched, it flows with the pipe 45a and merges with the pipe 35b as described above. The oil in the pipe 35b enters the hydraulic continuously variable transmission 38.

When the traveling direction switching lever 34 is moved leftward or rightward, the electromagnetic switching valve 37b moves to 51c.
The oil flows into the left hydraulic cylinder 41a or the right hydraulic cylinder 41b because the operation is switched to the side or 51b. When the traveling direction switching lever 34 is moved to the left,
Oil flows into the left hydraulic cylinder 41a, and the left link arm 4
Activate 2a. Then, the left side clutch 40a of the left mobile body 52a is disengaged. This state is a state in which power is not transmitted to the left traveling axle 49a, and is a configuration used for automatic direction control of the combine 1.

When oil is further sent into the left hydraulic cylinder 41a, the left moving body 52a moves and the left side clutch 4
The left brake 40c provided at the other end of 0a is in the on state. The left brake 40c is composed of a plurality of disc plates and is configured to turn left. In the case of a right turn, the right moving body 52a moves, but since it is symmetrical with the left turn, the description thereof will be omitted.

When the amount of oil fed into the left hydraulic cylinder 41a increases, the relief valve 44 operates, so that the oil passes through the pipe 43a, is fed into the right hydraulic cylinder 41b, and further passes through the pipe 43b. And the oil is mixed with the pipe 35b. Then, it is configured to enter the hydraulic continuously variable transmission 38.

From the pipe 35b to the hydraulic continuously variable transmission 38.
The oil that has entered the inside performs the charging of the oil in the closed circuit in the hydraulic continuously variable transmission 38, and then exits from the pipe 45b again. The oil that has flowed into the pipe 45b is introduced from above the bypass transmission case 47. The transmission mechanism 47a in the detour transmission case 47 is lubricated and flows downward.

After that, the oil flows to the upper part in the mission case 22, and again the hydraulic pump 36b is used to supply the pipe 35a.
It is sucked from and flows in the hydraulic circuit. Since a predetermined amount of oil is always stored in the mission case 22, the mission case 22 itself serves as an oil tank. Also, no oil tank is needed.

The charge valve 53 of the hydraulic continuously variable transmission 38 is provided on the most downstream side of the hydraulic pump 36b, and the amount of leakage from the closed circuit of the hydraulic continuously variable transmission 38 at the hydraulic pump 36b is obtained. It is a structure that can be charged with oil. In the most downstream part of the hydraulic continuously variable transmission 38, as shown in FIG.
As shown in FIG. 6, a charge valve 53 is provided, a relief valve 44 is provided upstream of the charge valve 53, and the relief valve 44 is always lifted up by the charge back pressure, as shown in FIGS. 6 and 7. As described above, the valve 44a is provided with the spring 44c and the like in such a state that it is always pushed in both the up and down directions, and the hydraulic continuously variable transmission 38 is provided with the relief valve 44 by the charge back pressure from the (a) side to the (b) side. The lift-up state is always set.

As a result, the valve 44a of the relief valve 44 is always pressed upward,
There is no play in the operating direction of the relief valve 44, and therefore the operability of the traveling direction switching lever 34 is good.

[Brief description of drawings]

FIG. 1 is an enlarged plan view of a reaper unit.

FIG. 2 is an enlarged side view of the reaper unit.

[Figure 3] Time chart

FIG. 4 is an enlarged plan view of the left operating device section.

FIG. 5 is an enlarged side view of the left operating device section.

[Figure 6] Circuit diagram

FIG. 7 is an enlarged side sectional view of the relief valve section.

[Figure 8] Overall side view of the combine

[Explanation of symbols]

2 vehicle chassis 3 reaper 4 thresher 5 Feed Chain 6 Cradling rod 7 Threshing room 8 culm length sensor device 9 Grain holding device 10 Control device T predetermined time L predetermined distance

Continued front page    F term (reference) 2B074 AA01 AB01 AC02 DA02 DB03                       DC01 EA07 EE02 FA04                 2B076 AA03 CA19 DA05 DA09 DD04                       EC11 ED09 ED30                 2B084 AA01 BH01 CC03 CE03 CG03                       DJ01 DN05 DN07

Claims (2)

[Claims] 1. On the front side of the traveling chassis 2, a vertically movable reaper 3 for cutting grain stalks, a feed chain 5 of a thresher 4 for feeding and transporting the stalks, and a holding rod 6 are provided.
In the threshing machine 4 for threshing the grain culms during holding and transfer, the threshing chamber 7, the culm length sensor device 8 for detecting the culm length of the grain culm supplied to the threshing chamber 7, and the culm length sensor device 8 are provided. Up and down rotatable grain culm holding and transferring device 9 and the like for adjusting the supply depth of grain culm based on the detected culm length are provided, and the reaper 3 is raised to a predetermined high position, and the reaping operation is performed. In a combine provided to automatically stop the operation of the machine 3 and the feed chain 5, the reaper 3 and the feed chain 5 are automatically stopped, and the reaper 3 is again cut after the automatic stop control. When the machine 3 is controlled to descend and the cutting operation is controlled to start, the control device 10 is provided to delay-control the start time of the handling depth adjusting operation of the grain-culling holding and transferring device 9 by a predetermined time (T). And combine harvester control device. 2. The reaper 3 is controlled to move up to a predetermined high position, and after the reaper 3 and the feed chain 5 are automatically stopped, the reaper 3 is again controlled to descend.
When the cutting operation is controlled to start, the control for starting the handling depth adjusting operation of the grain-culling holding and transferring device 9 is provided with a control device 10 to start the operation after traveling a predetermined distance (L). 1. The combine harvester control device according to 1.