JPS6345128Y2 - - Google Patents

Description

[Detailed description of the invention] The present invention includes, for example, a steering sensor arm that is provided in front of the cutting blade of the reaping section and is brought into contact with the uncut grain culm row, and the uncut grain culm row is detected by the sensor arm, and the uncut grain culm row is detected by the sensor arm. The present invention relates to an automatic steering device for a combine harvester that automatically controls steering by connecting and connecting left and right side clutches in accordance with the bending of a row of cut grain culms. Conventionally, as shown in Japanese Utility Model Publication No. 55-15686, a steering sensor arm is provided which is always in contact with a row of uncut grain culms, and the position of the row of uncut grain culms relative to the aircraft is detected by the backward movement of the sensor arm.
The technology for automatic steering control was developed.

However, in the prior art, the steering sensor arm is disposed on the side of the weed dividing plate in front of the raising case, so the sensor arm is likely to malfunction due to incompletely divided weed culms such as lodging culms. , At the rear position of the raising case, the uncut grain culm has been completely divided and raised, but by arranging the sensor arm at this position, when the sensor arm moves backward, the rear mowing It is easy to contact the blade, and the sensor arm can be shortened to prevent contact with the cutting blade, but the detection range of the sensor arm is narrowed, resulting in incomplete detection operation. Although it is possible to widen the gap between the raising case and the cutting blade, there are structural and functional problems such as deterioration of the structure and function of the cutting section.

However, the present invention provides an automatic steering device for a combine that is equipped with a steering sensor arm that is always in contact with a row of uncut grain culms, and that moves the sensor arm backward by contact with the row of uncut grain culms. The sensor arm is disposed between the sensor arm and the front end of the case, and the tip side has a lower ground clearance than the base end of the sensor arm, and the base end portion of the sensor arm has an acute angle that protrudes toward the front side of the fuselage. It is characterized by being bent into a shape.

Therefore, by arranging the sensor arm between the cutting blade and the front end of the lifting case, malfunction of the sensor arm due to fallen culms can be more easily prevented than before. It is possible to safely and appropriately detect the position of uncut grain culms, and by forming the tip side of the sensor arm to have a lower ground clearance than the base end, it is possible to prevent weeds from wrapping around the sensor arm's base end. The base end of the sensor arm is shaped into an acute angle that protrudes toward the front of the machine. By bending it, you can easily prevent the sensor arm that moves backward from coming into contact with the cutting blade without shortening the active part on the tip side of the sensor arm or increasing the distance between the lifting case and the cutting blade. In addition, the sensor arm detection range can be easily set to perform safer detection operations, and the sensor arm support structure can be simplified and the detection function can be improved compared to conventional methods. .

Embodiments of the present invention will be described in detail below based on the drawings. Figure 1 is a side view of the combine harvester, and Figure 2 is a plan view of the same. In the figure, 1 is a truck frame equipped with a traveling transmission 2 at the center of the front end, and 3 and 4 are drive sprockets on both sides of the truck frame 1. A traveling crawler is installed via 5, 5 and truck rollers 6, 7 is a machine base that is fixedly supported on the truck frame 1, and 8 is a machine with a feed chain 9 mounted on the left side of the machine base 7 for handling. A threshing section with a built-in shell 10; 11 a straw removal cutter provided on the rear side of the threshing section 8 and facing a straw removal chain 12 connected to the terminal end of the feed chain 9; 14 is a cutting blade 15 and a grain culm conveying mechanism 1
6, a rotation fulcrum shaft 17 and a lifting hydraulic cylinder 1
8, a reaping section that connects and supports the reaping frame 19 to the front end of the machine stand 7; 20, a paddy holder that extracts grains from the threshing section 8 via a grain hoisting tube 21; and 22, the traveling crawlers 3, 4, etc. An engine that drives each part of the combine, 23 is a driver's cab, 24 is a driver's seat,
Reference numeral 25 designates a driving operation unit having left and right side clutch levers 26, 27, etc., and is configured to continuously harvest and thresh grain culms.

FIG. 3 is an automatic steering system diagram, in which the traveling mission 2 includes a main shaft 28, a countershaft 29, and a side clutch shaft 30, and an input pulley 31 interlocked with the engine 22 is connected to the main shaft 28. support me,
The respective shafts 28 and 29 are interlocked and connected by a transmission gear group 32. A side clutch input gear 34 is engaged with a ring gear 33 which is engaged and supported by the countershaft 29, and the left and right sprocket shafts 35, 36 are connected to each other.
The shift output of the countershaft 29 is transmitted to final gears 37 and 38 which are engaged and supported by the left and right side clutches 39 and 40, respectively.
A left and right steering cylinder 4 is equipped with a 3-position, 4-port electrohydraulic switching valve 41 on the upper surface of the traveling transmission 2, and operates to disconnect left and right side clutches 39 and 40.
2 and 43, a hydraulic pump 44 interlocked and connected to the main shaft 28 is hydraulically connected via the switching valve 41, and automatic steering control is applied to the left-turn and right-turn solenoids 45 and 46 of the switching valve 41. The circuit 47 is electrically connected. An automatic steering sensor 48 electrically connected to the circuit 47 is provided on the left grass rod 49 of the reaping section 14, and a steering sensor arm 50 is provided in front of the cutting blade 15 to detect uncut grain culm rows. A grain culm conveyance sensor 51 electrically connected to the circuit 47 is provided at the handling port 52 of the threshing section 8, and
A conveyance sensor arm 53 is provided to detect the harvested grain culm conveyed from 4.

FIG. 4 is an electric circuit diagram showing the automatic steering control circuit 47, and when the aircraft moves to the right more than the setting and the steering sensor arm 50 that contacts the row of uncut grain culms is displaced, the arm 50 is The steering sensor switch 54 is turned on via the steering sensor switch 54 , and when the grain culm harvested by the cutting blade 15 is supplied from the reaping section 14 to the threshing section 8 , the reaped grain culm is transferred to the conveyor sensor arm 5 .
The automatic steering switch 56, the conveyance sensor switch 55, and the steering sensor switch 54 are connected in series to a power source 57.
A power source 57 is applied to the base of a transistor 59, which is a drive circuit 58 for exciting the right turning solenoid 46, through each switch 55, 56, and when each switch 55, 56 is on, the solenoid 46 is energized. It is formed so that it continuously turns to the right. Also, a transistor 6 which is a drive circuit 60 that excites the left turning solenoid 45
A power supply 57 is applied to the base of the switch 1 through each switch 54, 55, 56, and when each switch 55, 56 is turned on and the switch 54 is turned on by displacement of the steering sensor arm 50, the solenoid 45 is excited and rotated to the left. An OFF delay circuit 62 is connected to the switch 54 in parallel with the drive circuit 60, and a capacitor 63 having a time constant corresponding to a desired delay time is incorporated into the circuit 62. The turning stop circuit 65 is connected, and the operating power applied to the drive circuit 58 through the switches 55 and 56 is short-circuited to ground via the switching transistor 66 of the stop circuit 65, and the steering sensor The arm 50 detects the bending of the row of uncut grain culms and switches the switch 5.
4 is turned on, the output of the right turn signal to the drive circuit 58 is interrupted, the solenoid 46 is turned off, and after the switch 54 that outputs the left turn signal is turned off, the signal is outputted via the delay circuit 62. The stop circuit 65 is turned off after a certain time delay, and the solenoid 46 is energized again to restore the sensing operation.

FIG. 5 is a partially enlarged side view of the reaping section 14, FIG. 6 is a plan view of the same, and FIG. 7 is a front view of the same. A switch box 69 of the steering sensor 48 is fixed to the connecting pipe 68, an arm fulcrum shaft 70 connected to the steering sensor switch 54 is made to protrude from the bottom surface of the box 69, and a bolt 72 is attached to a bracket 71 provided on the fulcrum shaft 70. At the same time, the base end portion 50a of the sensor arm 50 is bent into an acute angle θ shape, and the length l of the action portion 50b of the sensor arm 50 is set as in the conventional case. At least two or more uncut grain culms are formed so as to be able to come into contact with each other, and when the sensor arm 50 is retreated by the uncut grain culms, the cutting blade 1
The sensor arm 50 necessary to prevent interference of
In order to provide a distance L between the tip and the cutting blade 15, the tip of the sensor arm 50 is formed so as to be separated from the cutting blade 15 at the rear.

The present invention is constructed as described above, and when the combine harvester is driven to continuously reap and thresh grain culms, the automatic steering switch 56 is turned on, and the reaped grain culms are transferred from the reaping section 14 to the threshing section. 8 and the transfer sensor switch 55 is turned on, the drive circuit 58 is turned on, energizing the right turning solenoid 46, actuating the right steering cylinder 43, disconnecting the right side clutch 40, and turning the right When the combine harvester turns to the right more than the setting, the steering sensor arm 50 that contacts the row of uncut grain culms is displaced, turns on the steering sensor switch 54, and turns on the right turn stop circuit 65. Turn on the solenoid 4
At the same time, the drive circuit 60 is de-energized.
Turn on and energize the left turning solenoid 45,
The left steering cylinder 42 is actuated to disengage the left side clutch 39 and turn the left side.When the left turning causes the steering sensor arm 50 to move back and the steering sensor switch 54 to turn off, the switch is turned off. The stop circuit 65 is kept on for a certain period of time via the delay circuit 62, each solenoid 45, 46 is turned off, and when the certain period of time has elapsed, the stop circuit 65 is turned off and the right turning solenoid 46 is energized again. , the combine harvester is turned to the right, and this operation is repeated to make the combine go approximately straight.

Furthermore, when the base end portion 50a of the steering sensor arm 50 is bent into an acute angle θ shape as described above, the action portion 50b of the sensor arm 50 can be positioned forward than in the conventional structure. Even if the fulcrum shaft 70 of the sensor arm 50 is installed in the same position as before, the distance L between the tip of the sensor arm 50 and the cutting blade 15 can be formed sufficiently without changing the length l of the acting part 50b of the sensor arm 50. The arm 50 can reliably detect two or more rows of uncut grain culms, the steering sensor switch 54 can be switched smoothly, and interference with the cutting blade 15 can be eliminated, and the sensor arm 50 can uncut the grain. It is possible to accurately detect grain culm rows.

As is clear from the above embodiments, the present invention provides a steering sensor arm 50 that is constantly brought into contact with uncut grain culm rows.
In the automatic steering device for a combine harvester, which operates the sensor arm 50 backward by contact with an uncut grain culm row, the sensor arm 50 is disposed between the cutting blade 15 and the front end side of the lifting case 67. ,
The tip side of the sensor arm 50 has a lower ground clearance than the base end, and the base end portion of the sensor arm 50 is bent into an acute angle shape to protrude toward the front side of the machine body, so that the cutting blade 15 and the lifting Case 6
By disposing the sensor arm 50 between the front end side of the sensor arm 5 and the front end side of the sensor arm 5,
0 malfunction can be prevented more easily than before,
It is possible to detect the position of uncut grain culms more safely and appropriately than before, and the sensor arm 5
By making the ground clearance of the tip side lower than the base end of the sensor arm 50, it is possible to prevent weeds from wrapping around the base end of the sensor arm 50, and the sensor arm can be placed at the base of the plant near the field of uncut grain culms. A more stable detection operation can be easily obtained by contacting the sensor arm 5, and the sensor arm 5 has an acute angle shape that protrudes toward the front of the aircraft.
By bending the base end portion of the sensor arm 50, the sensor arm 50 that moves backward can cut without shortening the active part on the tip side of the sensor arm 50 or increasing the distance between the lifting case 67 and the cutting blade 15. Blade 1
5 can be easily prevented from coming into contact with the sensor arm 50, the detection range of the sensor arm 50 can be easily set, and a safer detection operation can be performed, and the support structure of the sensor arm 50 can be simplified and This has practical effects such as the ability to easily improve the detection function.

[Brief explanation of the drawing]

Fig. 1 is a side view of a combine harvester showing an embodiment of the present invention, Fig. 2 is a plan view thereof, Fig. 3 is an automatic steering system diagram, Fig. 4 is its electrical circuit diagram, and Fig. 5 is a reaping section. FIG. 6 is a plan view of the same, and FIG. 7 is a front view of the same. 15...Mowing blade, 50...Steering sensor arm, 5
0a... Proximal end portion, 50b... Action portion.

Claims (1)

[Scope of utility model registration request] The automatic steering device for a combine includes a steering sensor arm 50 that is always brought into contact with a row of uncut grain culms, and moves the sensor arm 50 backward by contact with the row of uncut grain culms. The sensor arm 50 is disposed between the sensor arm 50 and the front end side, and the tip side has a lower ground clearance than the base end of the sensor arm 50, and the base end portion of the sensor arm 50 projects toward the front side of the aircraft body. An automatic steering device for a combine harvester characterized by being bent into an acute angle shape.