JPS6230887Y2 - - Google Patents

Description

[Detailed description of the invention] "Field of industrial application" The invention consists of a steering sensor that detects grain culm rows, and an automatic steering switching valve that appropriately controls the left and right crawlers based on the running direction detection output of the sensor. The sensor detects the relative positional relationship between the grass divider plate and the row of uncut grain culms, and the automatic steering switching valve operates the side clutch as appropriate to control the direction of the left and right crawlers. This invention relates to an improvement of a device by which corrections are made.

"Prior Art" Conventionally, as shown in Japanese Utility Model Publication No. 50-43457, the steering control by a steering switching member is interrupted based on the non-detection of a grain culm row by a steering sensor, and the left and right crawlers are stopped. The technology has improved.

Furthermore, as shown in Japanese Patent Publication No. 50-38565, for example, there is a technique for stopping the movement of the aircraft after a certain period of time delay based on the sensor's non-detection of grain culm rows.

"Problems to be Solved by the Invention" In the prior art, one row of grain culms is detected from one side by a steering sensor, so the sensor is separated from the grain culm row and the grain culm is The sensor detects almost the same state as the non-detection state in which there are no rows, so the sensor cannot accurately detect the end of reaping, and the automatic steering mechanism does not automatically It is difficult to simplify the control position that incorporates the stop mechanism, especially the detection structure of the steering sensor that distinguishes when the grain has left the grain culm row and when there is no grain culm row, and the automatic operation that intermittently controls the side clutch of the combine. There was a problem in that it was not easy to obtain a structure for connecting the automatic stop mechanism to the direction mechanism.

Furthermore, as shown in Japanese Utility Model Application Publication No. 50-39340, there was a technique for detecting grain culm rows from both sides using left and right sensors, but the straight-line mode of the sensors and the non-detection state where the grain culm rows disappeared. The problem is that the above-mentioned sensor cannot accurately detect the end of reaping, and it is not easy to obtain a structure for connecting an automatic stop mechanism as in the above-mentioned prior art. It was hot.

``Means for solving the problem'' However, the present invention has left and right steering sensors installed oppositely on both sides of the dividing plate in the center of the multi-row cutting section, and the operation of the left and right sensors to detect grain culm rows is effective. While configuring the delay member to be operable, a travel stop 2-port hydraulic switching valve for stopping the left and right traveling crawlers is connected to the steering hydraulic switching valve, and the 2-port hydraulic switching valve is controlled by the delay member. A manual switch for emergency stop is provided to control the operation of the aircraft, and the switch and the steering sensor are arranged in parallel to the two-port hydraulic switching valve, By operation, the above 2
It is configured such that stop control is possible via a port hydraulic pressure switching valve and a steering hydraulic pressure switching valve.

"Operation" Therefore, by detecting the presence or absence of two grain culm rows from different side directions using the left and right steering sensors, the state where the grain culm row is away from the grain culm row and the state where there is no grain culm row can be distinguished as described above. Each sensor can clearly distinguish and detect, and the sensor output can be accurately obtained using a switch structure that is extremely simple compared to the conventional one, and the steering hydraulic pressure switching valve is equipped with a 2-port hydraulic switching valve for stopping the vehicle. By connecting the automatic steering mechanism that controls the side clutch of the combine harvester intermittently, the automatic stop mechanism of the two-port hydraulic switching valve can be more easily connected to the automatic steering mechanism that controls the intermittent control of the side clutch of the combine. While the control structure for steering and automatic stopping and the simplification of the handling operations thereof can be easily achieved compared to conventional systems, the manual stopping structure of the switch can be simplified by combining the two-port hydraulic switching valve and the steering hydraulic switching valve. It is easy to create a structure that manually stops the movement of the machine outside of harvesting operations without the need for a special installation, and it is easy to add multiple functions without complicating the structure compared to conventional methods. Furthermore, even an inexperienced worker can momentarily stop the machine from moving by operating the switch, which prevents accidents such as falling from farm roads, making it safer to handle than before.

"Embodiments" Examples of the present invention will be described below in detail based on the drawings.

Fig. 1 is a schematic side view of the combine harvester, and Fig. 2 is a plan view thereof, in which 1 is a truck frame, 2,
Left and right crawlers 6 3 are installed on both sides of the track frame 1 via drive sprockets 4, 4 and track rollers 5.
9 is a threshing section that incorporates a handling cylinder 10 and is mounted on the loom 6, 11 is a reaping section provided in front of the threshing section 9, and 12 is a threshing section. A straw cutting section is provided at the rear of the threshing section 9, a feed chain 13 is installed on the left side of the threshing section 9 to convey the grain culm, and a feed chain 14 is installed on the right side of the threshing section 9, facing the conveyor 15 first. rice holder,
16 is an engine installed behind the rice holder 14;
Reference numeral 17 denotes a driving console located on the right side of the reaping section 11 and fixed to the truck frame 1. A driver's seat 18 and a driving console 19 are provided on the console 17, and a side clutch lever 20, 20, Reaping clutch lever 21, Threshing clutch lever 2
2. It is equipped with a power shift lever 23 for hydraulic transmission, an auxiliary transmission lever 24, and a cutting height and handling depth adjustment lever 25.

Further, the reaping section 11 is a three-row reaper, and includes a reaping frame 26, a weed dividing board 27, . . ., grain culm lifting tines 28.
..., a cutting blade 29, a grain culm conveyor 30, and steering sensors 31, 32 are provided at the tips of the left and right reaping frames 26, 26.

As shown in FIG. 3, the steering sensors 31 and 3
2 is formed in a symmetrical structure so as to sense the left and right uncut grain culm rows 33, 33, and sensor arms 34 and 35 are brought into contact with the culm bases of the uncut grain culm rows 33;
Links 36 and 37 that swingably support the arms 34 and 35 in the horizontal direction, and a sliding rod 3 that is connected to the links 36 and 37 and moves in the front-rear direction.
8 and 39, and springs 40 and 4 that bias the sliding rods 38 and 39 to keep the sensor arms 34 and 35 in contact with the uncut grain culm rows 33 and 33.
1, and the sliding rods 38 and 39 are springs 40.
and a running path (rightward and leftward) detection switch 4 that conducts electricity when the protrusions 42 and 43 formed thereon contact and conduct when the switch 4 moves forward by a predetermined amount or more against
4 and 45, and the projections 42 and 4 when the uncut grain culm row 33 is removed and the sliding rods 38 and 39 are displaced backward by more than a set amount by the springs 40 and 41.
Uncut grain row detection switch 46 that conducts electricity when 3 is in contact with it
and 47, the sensor arms 34 and 3
The horizontal rotation of the switch 5 is converted into a front-back movement of the sliding rods 38 and 39, and the relative positional relationship (rightward and leftward) between the weed dividing plate 27 and the uncut grain culm row 33 is changed by the switch 4.
4 and 45, and the presence or absence of the uncut grain culm row 33 is also detected by the switches 46 and 47.

Furthermore, the sprockets 4, 4 for driving the left and right crawlers 2, 3 are mounted on both sides of the transmission 48, and the internal structure of the transmission 48 can be briefly explained using the Utility Model Application No. 51-1-1 filed by the applicant of the present invention.
As detailed in No. 135530, etc., it has a hydraulic switching type main transmission section including a wet multi-disc clutch and a mechanical switching type sub-transmission section that engages the transmission gears as appropriate, and changes the engine's 16 outputs through each section. , so that this speed change output is transmitted to each sprocket 4, 4 via a side clutch. The side clutch includes a wet multi-plate clutch, which continues the gear change output using hydraulic pressure, and the transmission 48 uses single-acting hydraulic cylinders 49 and 50 to engage and close the side clutch.
It will be built into. A hydraulic pump 52 is connected to the cylinders 49 and 50 via an electromagnetic switching type 4-port 3-position hydraulic switching valve 51, which is a steering hydraulic switching valve that drives and controls the left and right crawlers 2, 3 as appropriate.
A relief valve 53 is installed in parallel with the pump 52, and an electromagnetic switching type two-port hydraulic switching valve 54, which is an automatic stopping member that simultaneously stops the left and right crawlers 2 and 3 via the steering hydraulic switching valve 51, is installed in parallel with the pump 52. Tank line of the hydraulic pressure switching valve 51 (hydraulic return side)
Incorporate into. The switching valve 51 is of an open center type, and an oil passage is formed so that the hydraulic oil discharged from the hydraulic pump 52 is normally conducted to each cylinder 49, 50 and the switching valve 54, and returns to the tank 55 via the switching valve 54. In this state, the engine 16 is connected to the left and right crawlers 2 and 3 via the left and right side clutches.
By switching the switching valve 51, the pump 52 is communicated with only one of the cylinders 49, 50, and the other is communicated with the tank 55 via the switching valve 54. By appropriately stopping either of the crawlers 2 and 3 to change and correct the traveling direction, and by switching the switching valve 54 while the switching valve 51 is in the neutral state,
A pump 52 is communicated with each cylinder 49, 50, and the left and right crawlers 2, 3 are configured to be stopped at the same time.

A solenoid 56 that communicates a pump 52 with the cylinder 49 that stops the left crawler 2 is electrically connected to the right-side travel path detection switch 44, and a solenoid 57 that communicates the pump 52 with the cylinder 50 that stops the right crawler 3. is electrically connected to the travel course left deviation detection switch 45. In addition, the above-mentioned uncut grain row detection switch 4
Uncut grain culm row insensitive circuit 58 that electrically connects 6 and 47
A timer circuit 59, which is a delay member, is connected to the solenoid 6 of the switching valve 54.
0, and when the sensor arms 34 and 35 no longer sense the uncut grain culm row 33, the timer circuit 59 is connected via the switches 46 and 47 and the dead circuit 58. After a set time, the solenoid 60 is operated to switch the switching valve 54, and each cylinder 49, 50 is operated to stop the left and right crawlers 2, 3.

In addition, a limit switch 61 is provided, which is a manual switch for emergency stop to manually stop the traveling of the machine, and the limit switch 61 is connected to the solenoid 60, and the switch is activated when the uncut grain culm 33 is not detected or when traveling on the road. It is also possible to emergency stop the left and right crawlers 2 and 3 by manually operating the switch 61.
By turning off the switches 6 and 57 and turning on the solenoid 60, the switch 61 is operated to cause an emergency stop regardless of the driving mode. It is arranged in parallel with the solenoid 60 of the hydraulic switching valve 54, and can be stopped and controlled via the two-port hydraulic switching valve 54 and the hydraulic switching valve 51 by operating the switch 61.

The present invention is constructed as described above, and when the grass divider plate 27 is positioned at an appropriate distance from the uncut grain culm row 33 as shown in FIG. , 47 and each solenoid 5
6, 57 and 60 are all turned off, and each switching valve 5
The pump 52 is short-circuited to the tank 55 via the terminals 1 and 54, and the engine 16 is connected via the left and right side clutches.
The output is transmitted to the drive sprockets 4, 4, which drive the left and right crawlers 2, 3 to run straight ahead,
When the grain culm is continuously harvested and threshed, and the running direction is to the right, the distance between the left sensor arm 34 and the uncut grain culm row 33 becomes small, and the arm 3
4 is pushed by the grain culm 33 and rotates rearward, which causes the protrusion 42 to move forward together with the sliding rod 38, turning on the right-side detection switch 44 and operating the switching valve 51 via the solenoid 56. , the pump 52 is communicated with the cylinder 49, the left side clutch is disengaged, the left crawler 2 is stopped, and the traveling direction is corrected to the left.

On the other hand, when the traveling direction shifts to the left, the distance between the right sensor arm 35 and the uncut grain culm row 33 becomes smaller, the protrusion 43 moves forward together with the sliding rod 39 as described above, and the left shift detection switch 45 and the solenoid 57 is turned on to operate the switching valve 51,
The pump 52 is communicated with the cylinder 50, the right side clutch is disengaged, the right crawler 3 is stopped, and the traveling direction is corrected to the right.

In addition, in the above-mentioned direction correction, even if either the uncut grain culm row detection switch 46 or 47 is turned on, no output is generated from the insensitive circuit 58 and the timer circuit 59.

Next, when the uncut grain culm row 33 disappears, the left and right sliding rods 3 are moved by the respective springs 40 and 41.
8, 39 and protrusions 42, 43 are moved backward, and each uncut grain culm row detection switch 46, 47 is turned on.
A timer circuit 59 is activated via a dead circuit 58, and after a set time, a solenoid 60 is turned on, and a switching valve 54 is activated to cut off the tank line.
At this time, each solenoid 56, 57 is off, the switching valve 51 is in the neutral position, and the pump 52 is communicated with each cylinder 49, 50, so the left and right side clutches are disengaged, and the left and right crawlers 2, 3 stop at the same time. However, the operation of the combine harvester is interrupted.

When the left and right crawlers 2 and 3 are stopped simultaneously via the side clutches as described above, when the main transmission section of the transmission 48 is a hydraulic switching type including a wet multi-disc clutch as described above, it is necessary to stop the left and right crawlers 2 and 3 at the same time via the side clutches. The main clutch can be omitted, and when the main clutch is hydraulic, there is no need for a switching valve or cylinder, and in particular, an automatic stop hydraulic circuit can be configured simply by incorporating the 2-port hydraulic switching valve 54 into the automatic steering hydraulic circuit. It can be used for a variety of purposes simply by increasing or decreasing the number of electric circuits (such as the switch 61), and can be provided at low cost with a very simple configuration.

"Effects of the Invention" As is clear from the above embodiments, the present invention has a steering hydraulic switching valve 5 that corrects the aircraft course based on the outputs of the steering sensors 31 and 32 that detect the grain culm row 33.
1, the grain culm row 3 of the steering sensors 31 and 32
3. In a device that stops the left and right traveling crawlers 2 and 3 by interrupting the steering control by the steering hydraulic switching valve 51 via a delay member 59 that delays output based on a non-detection operation, the multi-row reaping section 11 Central grass dividing plate 27 Left and right steering sensors 31, 32 on both sides
are arranged oppositely, and the grain culm row 3 of the left and right sensors 31 and 32 is
3. A two-port hydraulic switching valve 54 for stopping travel that operates to stop the left and right traveling crawlers 2 and 3 while configuring the delay member 59 to be operable by non-detection operation.
is connected to the steering hydraulic switching valve 51, and configured to control the operation of the two-port hydraulic switching valve 54 by the delay member 59, and an emergency stop limit switch 61 for manually stopping the traveling of the aircraft. A manual switch is provided, and the switch 6
1 and the steering sensors 31 and 32 are arranged in parallel to the 2-port hydraulic switching valve 54, and the switch 6
It is configured so that it can be stopped by one operation via the 2-port hydraulic switching valve 54 and the steering hydraulic switching valve 51, and the presence or absence of the two rows of grain culms 33, 34 can be controlled from the left and right from different lateral directions. direction sensor 31,3
2, it is possible to clearly distinguish and detect the state away from the grain culm row 33 and the state where there is no grain culm row, and the outputs of the sensors 31 and 32 can be detected by the sensors 31 and 32, compared to the conventional one. In addition, by connecting the two-port hydraulic switching valve 54 for stopping travel to the hydraulic switching valve 51 for steering, it is possible to achieve an automatic switch structure that is extremely simple compared to that in comparison, and provides intermittent control of the side clutch of the combine. The automatic stop mechanism of the two-port hydraulic switching valve 54 can be connected to the steering mechanism more easily than before without making any improvements to the steering mechanism, and a control structure for automatic steering and automatic stop and a control structure for handling this operation are provided. While the simplification can be achieved more easily than in the past, since the 2-port hydraulic switching valve 54 and the steering hydraulic switching valve 51 are used together, harvesting operations can be performed without the need for a special manual stop structure for the switch 61. It is possible to easily obtain a structure that manually stops the movement of the aircraft at times other than when the aircraft is running, and it is easy to achieve multi-functions without complicating the structure compared to conventional ones. Even a simple worker can instantly stop the machine by operating the switch 61, which has practical effects such as preventing accidents such as falling off farm roads and making it safer to handle than before. be.

[Brief explanation of the drawing]

FIG. 1 is a schematic side view of a combine harvester showing an embodiment of the present invention, FIG. 2 is a plan view thereof, and FIG. 3 is a system diagram of the main parts. 2, 3... Traveling crawler, 11... Reaping section, 2
7... Grass divider plate, 31, 32... Steering sensor, 33
... Grain culm row, 51 ... Hydraulic switching valve for steering, 54 ...
...2-port hydraulic switching valve, 61...Limit switch (manual switch).

Claims (1)

[Scope of utility model registration request] It is equipped with a steering hydraulic switching valve 51 that corrects the aircraft course based on the output of the steering sensors 31 and 32 that detect the grain culm row 33, and based on the non-detection operation of the grain culm row 33 of the steering sensors 31 and 32. The steering control by the steering hydraulic switching valve 51 is interrupted via a delay member 59 that outputs this signal with a delay, and the left/right traveling crawler 2,
3, the multi-row reaping section 11
Left and right steering sensors 3 are installed on both sides of the central grass dividing plate 27.
1 and 32 are arranged opposite each other, and the delay member 59 is configured to be operable by the non-detection operation of the grain culm row 33 of the left and right sensors 31 and 32, while the traveling stop 2 is configured to operate to stop the left and right traveling crawlers 2 and 3. The port hydraulic switching valve 54 is connected to the steering hydraulic switching valve 51, and the delay member 59 is configured to control the operation of the 2-port hydraulic switching valve 54, and the emergency stop is to stop the traveling of the aircraft by manual operation. A manual switch 61 is provided for use, and the switch 61 and the steering sensors 31 and 32 are arranged in parallel with the 2-port hydraulic switching valve 54, and when the switch 61 is operated, the 2-port hydraulic switching valve 54 and the steering An automatic stop device for a combine harvester, characterized in that it is configured to be stop controllable via a hydraulic pressure switching valve 51.