JPH0221770B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention allows a machine to be moved by a crawler, reaps grain culms with a reaping device provided at the front end of the machine, and transfers the harvested grain culms to a self-removal type using a grain culm conveying device. The present invention relates to an improvement in a cutting height adjusting device for a combine harvester in which grain is supplied to a supply port of a threshing part and threshed in the threshing part.

When harvesting grain culms using the above-mentioned combine harvester, if the chassis tilts to the left or right due to unevenness in the field, the reaping device mounted on the chassis tilts to the left or right with respect to the ground surface, causing the cutting width of the harvester to tilt to the left or right. As one end of the grain culm in the direction descends and approaches the ground surface, the other end rises and moves away from the ground surface, making the cutting height of the grain culm uneven, and depending on the slope, the lowered side There is a problem where the tip of the blade gets stuck in the ground.

This problem could be solved by supporting the reaping device on a machine frame that rolls against the chassis so that the reaping device would maintain a horizontal position even if the chassis tilted from side to side. The rolling of the reaping device determines the relative position between the reaping device and the grain culm conveying device that transfers the harvested grain culm harvested by the reaping device to the starting end, and the supply port of the grain culm conveying device and the threshing section. Another problem arises in that the relative position of the grain culm becomes out of order, causing problems in the transfer of the harvested grain culm between the reaping device and the grain culm conveying device, and in the delivery of the grain culm to the supply port of the threshing section.

In addition, as a countermeasure to this problem,
As stated in the publication, a reaping device, a grain culm conveying device that takes over and transports the grain culm harvested by the reaping device, and a threshing device are supported on a machine frame that can be rolled with respect to a traveling vehicle platform by left and right crawlers. A means for correcting the reaping device to a position parallel to the ground surface while maintaining a constant position relative to the grain culm conveying device and the threshing device even if the vehicle platform tilts left and right. It has been known.

However, this method connects the rear end side of the machine frame and the rear end side of the chassis run by left and right crawlers through a single ball joint located at the center of the left and right sides, and The front end side of the machine is connected to the front end side of the reaping device, the grain culm conveyance device, and the threshing device by controlling the expansion and contraction operations of the left and right hydraulic cylinder devices, respectively. Since the frame is designed to roll, the rolling of the machine frame to the chassis is achieved by connecting it with a ball joint.
This is done while maintaining a constant relative distance between the machine frame and the chassis in the left and right centers.
When the front or rear end of the aircraft falls into a recess in the ground surface and the aircraft is tilted forward or backward, when rolling is performed, the side edges of the aircraft frame may interfere with the ground surface. This problem becomes especially serious in wet fields where the aircraft tends to sink into the ground. In addition, the left and right crawlers are tilted to the left and right with respect to the machine frame, so that when one crawler falls into a groove, the contact surface side of the track of that crawler will touch the ground diagonally. As a result, sideslip occurs, making it difficult to correct the direction, and causing the crawler track to come off easily.

The present invention has been made in order to solve these problems, and the present invention has been made in such a way that the reaping device can be attached to the chassis so that even if the chassis is tilted from side to side, there will be no variation in the cutting height of the reaping device. The purpose of automatic rolling control is to use a simple mechanism to transfer the harvested grain culm between the reaping device and the grain culm transport device, and to transfer the grain between the grain culm transport device and the supply port of the threshing section. The system is designed to ensure that the culm is delivered and the sorting device inside the machine does not malfunction in the threshing section, and that rolling can be performed sufficiently even in wet fields where the machine body tends to settle. It is an object of the present invention to provide a new means for easily correcting the direction of a crawler in the event of a fall, and for preventing the track of a crawler from coming off.

In the present invention, as a means for achieving this object, a machine frame on which a reaping device and a grain culm conveying device that takes over and conveys the grain culm harvested by the reaping device is mounted is installed on the machine frame. The vehicle is mounted on a vehicle chassis that travels by left and right crawlers that are installed to move up and down independently against the vehicle, and is mounted so that it can roll on the chassis while maintaining a horizontal posture from side to side using a plurality of extendable and contracting hydraulic cylinder devices. In the machine frame, a self-threshing type threshing section that receives the harvested grain culm transported by the grain culm transport device to a supply port and processes it for threshing is connected in series with the grain culm transport device and the reaping device. A single horizontal inclination detection device is installed to detect the horizontal inclination of the machine frame relative to the ground, and the machine frame is moved by extending and contracting the hydraulic cylinder device based on the detection result of the horizontal inclination detecting device. A cutting height adjustment device for a combine harvester configured to control the left and right inclination of the chassis so that the reaping device, the grain culm conveying device, and the threshing section roll relative to the chassis 12 while keeping their relative positions constant. This is something I would like to raise.

Next, an example of implementation will be described in detail with reference to the drawings.

FIG. 1 shows an outline of a combine 1 seen from the side, in which the present invention can be implemented. In the figure, 2 is a pair of crawlers provided on the left and right (one is omitted in the drawing), and 13 is a machine frame mounted on the chassis 12, 12 (Fig. 3) on which the crawlers 2, 2 are mounted on the shaft. ,6
1 is a threshing section consisting of a self-threshing type threshing device, 7 is a supply port formed at the starting end of the grain culm supply chain of the threshing section 6, and 3 is a supply port at the front end of the combine harvester 1 for weeding the grain culms to be harvested. 4 is a reaping device arranged and equipped so as to reap the edge of the grain culm that has been divided by the weeding device 3; 5 is a reaping device that removes the grain culm that has been reaped by the reaping device 4 in the threshing section 6; A conveying device for conveying to the supply port 7 is shown.

The conveying device 5 is composed of a grain culm pulling device 5a that raises the grain culm, a grain culm conveying device 5b that grips and conveys the stock end of the harvested grain culm, and an ear tip conveying device 5c that conveys the tip of the harvested grain culm. The crawler 2 includes a driving wheel 9 and a driven wheel 9' mounted on a longitudinally long frame 8, and a plurality of rolling wheels loosely supported along the longitudinal direction of the frame 8. 10... It is normally constructed by endlessly running the crawler track 11 (Fig. 4), but the chassis 12, 12 on which it is mounted is divided into left and right halves as shown in Fig. 3. , each chassis 1
2 and 12 are each equipped with a crawler 2.

Therefore, the machine frame 13 has the above-mentioned chassis 12,
When mounting it on 12, the chassis 1 is divided into left and right parts.
The lower ends of support rods 15 are pivotally connected to the front and rear ends of 2 and 12 so as to rotate back and forth, and the upper ends of the front and rear support rods 15, 15 are connected to
The guide tube portions 14, 14, . Hydraulic cylinder devices 17 and 1 are located adjacent to the cylinders 17 and 1, each of which operates independently to extend and retract vertically.
The upper ends of each of the hydraulic cylinder devices 17, 17... are pivotally connected to each other so as to be rotatable back and forth, respectively.
are pivotally connected to the front and rear ends of the left and right chassis 12, 12 adjacent to the support rods 15, 15 so as to be rotatable in the front and rear direction, and these hydraulic cylinder devices The machine frame 13 is mounted so that it can freely move up and down with respect to the chassis 12, 12 by the telescopic operation of 17.

The hydraulic cylinder devices 17 are controlled to extend and contract by operating the respective switching valves a provided in the control valve device 19 of the hydraulic device 16 provided in the machine frame 13. Frame 1
3 is provided with a lateral inclination detection device 18 for sensing the lateral inclination of the machine frame 13 with respect to the ground (horizontal surface), and each switching valve a is activated by a signal sent from the lateral inclination detection device 18. As a result, when the machine frame 13 is tilted to the left or right with respect to the ground, the machine frame 13 is tilted to the vehicle body based on the detection result of the tilt of the machine frame 13 by the lateral tilt relative to the ground detection device 18. 12, 12 are controlled to adjust the left and right inclinations, so that the machine frame 13 maintains a posture parallel to the ground.

Then, the above-mentioned reaping device 4 and conveying device 5
is supported on the front end of this machine frame 13,
The threshing section 6 is mounted on the upper surface of the machine frame 13, and thereby connects the reaping device 4 and a grain culm conveying device that transfers the reaped grain culm harvested by the reaping device 4 to the starting end and conveys it rearward. 5b and a threshing unit 6 which takes over the harvested grain culms conveyed thereby at the supply port 7.
are connected in series and supported on the machine frame 13, and by tilting and swinging the machine frame 13 left and right with respect to the chassis 12, 12, the series of connected states are maintained and the machine frame 13 is supported on the chassis 12, 12. It is designed to roll.

Reference numeral 20 denotes a transmission means for transmitting power from a prime mover (not shown) to the left and right crawlers 2, 2, and in this embodiment, it is connected to the axle 21 of the drive wheel 9 and the transmission case 22 containing the transmission mechanism on both sides. It is connected to a main shaft 23 protruding toward the direction via a universal joint 24,
The configuration is such that rotational power can be transmitted regardless of the vertical movement of the crawlers 2, 2. Note that 30 is a stopper that restricts the range of vertical movement of each support rod 15.

The embodiment device constructed in this manner operates as follows.

When the reaping device 4 installed on the machine frame 13 tilts to the left or right due to the unevenness of the field, etc., the chassis 12, 12 tilts, the horizontal tilt detection device 18 installed on the machine frame 13 tilts from side to side. 13 is detected, the respective switching valves a of the hydraulic cylinder devices 17... are operated, and the hydraulic cylinder devices 17... are telescopically operated.
The reaping device 4, which is installed on the machine frame 13 and tilted left and right, is rolled with respect to the chassis 12, 12, and its attitude is corrected to be parallel to the ground.

As a result, the reaping device 4 and the grain culm conveying device 5b supported on the machine frame 13, and the threshing section 6 to which the harvested grain culm is delivered from the grain culm conveying device 5b,
The swing of the machine frame 13 causes the chassis 1 to move along with the reaping device 4.
It starts rolling for 2 and 12.

As a result, the reaping device 4 is moved to the chassis 1.
2, 12, during the rolling operation, the reaping device 4 and the grain culm conveying device 5b
The relative position of the grain culm conveying device 5b and the threshing section 6
The relative position with the supply port 7 is maintained constant, and the threshing section 6 is maintained in a horizontal position to prevent malfunction of the sorting device in the threshing section 6 caused by the inclination. become.

In addition, rolling in a state where the rear end side of the chassis 12, 12 falls into a recess in the field surface, and the rear end side of the machine frame 13 comes into contact with the field surface, also causes the machine frame near the ground surface to roll. The rear end side of 13 moves away from the ground surface as it rises relative to the chassis 12, 12, thereby making it possible to correct irregularities in cutting height due to this rolling.
Then, this rolling control is performed by one ground-to-left/right tilt detection device.

Furthermore, when the machine frame 13 that supports the reaping device 4, the transport device 5, and the threshing section 6 is rolled relative to the chassis 12 by the expansion and contraction operation of the hydraulic cylinder devices 17, the machine frame 13 is independent of the machine frame 13. The left and right crawlers 2, 2 are provided to move up and down.
Since each of them moves up and down relative to the machine frame 13, the contact surfaces of the crawler tracks 11 of the left and right crawlers 2, 2 always maintain a posture parallel to the machine frame 13, and one of the crawlers Even when the vehicle falls into a ditch, the entire width of the contact surface side of the crawler track 11 comes into contact with the ground, and the direction correction operation is performed smoothly.
Moreover, the crawler belt 11 is prevented from coming off.

In addition, the left and right crawlers 2, 2 are independently mounted on the machine frame 1.
3, the ground height of the machine frame 13 can be changed freely by adjusting the hydraulic cylinder device 17, making it suitable for work in wet fields where the machine body tends to sink. You will get it.

As explained above, the cutting height adjusting device for a combine harvester according to the present invention is provided with a machine frame 13 on which is mounted the reaping device 4 and the grain culm conveying device 5b that takes over and conveys the grain culm harvested by the reaping device 4. to the chassis 12, which is run by left and right crawlers 2, 2, which are provided to move up and down independently with respect to the machine frame 13,
The grain is held horizontally horizontally by a plurality of extendable and retractable hydraulic cylinder devices 17 and is rollably mounted on the chassis 12, and the grain is transported to the machine frame 13 by the grain transport device 5b. A self-thresholding type threshing unit 6 that receives the harvested grain culm to the supply port 7 and processes it for threshing is mounted in a state connected to the grain culm conveying device 5b and the reaping device 4 in series, and the machine frame 13 A hydraulic cylinder device 17 is provided with one horizontal inclination detecting device 18 for detecting the horizontal inclination relative to the ground, and the hydraulic cylinder device 17 is based on the detection result of the horizontal inclination detecting device 18.
The machine frame 13 is controlled to adjust the horizontal inclination relative to the chassis 12 by the telescopic operation of..., and the reaping device 4, grain culm conveying device 5b, and threshing section 6 maintain their relative positions constant and move to the chassis 12. Since the reaping device is configured to roll relative to the vehicle chassis, even if the vehicle chassis tilts to the left or right, the reaping device is automatically controlled to roll relative to the vehicle chassis so as not to cause variations in the cutting height of the reaping device. The reason is that
With a simple mechanism, the transfer of harvested grain culms between the reaping device and the grain culm conveyance device, the delivery of grain culms between the grain culm conveyance device and the supply port of the threshing section, and the transfer of the grain culm in the machine of the threshing section. It is possible to perform sufficient rolling even in wet fields where the machine body tends to sink without causing any malfunction in the operation of the sorting device, and it is also possible to easily correct the direction when one crawler falls into a groove. In addition, the crawler track can be prevented from coming off.

[Brief explanation of drawings]

Fig. 1 is a side view of a combine harvester embodying the present invention, Fig. 2 is a cutaway front view of the main parts, Fig. 3 is a front view showing the operating state, Fig. 4 is a side view thereof, and Fig. 5 is a circuit diagram. It is. Explanation of drawing symbols, a...Switching valve, 1...Combine harvester, 10...Rolling wheels, 11...Crawler tracks, 12...Car chassis, 13...Machine frame, 14...Guiding tube section, 15...
Support rod, 16... Hydraulic device, 17... Hydraulic cylinder device, 18... Ground left/right inclination detection device, 19...
... Control valve device, 2 ... Crawler, 20 ... Transmission means, 21 ... Axle, 22 ... Mission case,
23... Main shaft, 24... Universal joint, 3... Grass splitting body, 30... Stopper, 4... Reaping device, 5...
...Conveyance device, 5a... Grain culm pulling device, 5b... Grain culm transfer device, 5c... Ear tip transfer device, 6... Threshing section, 7... Supply port, 8... Frame, 9... Drive wheel, 9'...Driver wheel.

Claims (1)

[Claims] 1. A machine frame 13 on which is mounted a reaping device 4 and a grain culm conveying device 5b that inherits and transports the grain culm harvested by the reaping device 4 is provided so as to be able to move up and down independently with respect to the machine frame 13. The machine frame 13 is mounted on the chassis 12, which is moved by left and right crawlers 2, 2, and is rollably mounted on the chassis 12 while maintaining a horizontal posture on the left and right sides by a plurality of extendable and retractable hydraulic cylinder devices 17. The grain culm conveying device 5b is equipped with a self-threshing type threshing section 6 that receives the harvested grain culm conveyed by the grain culm conveying device 5b to the supply port 7 and processes it for threshing.
There is provided one horizontal inclination detecting device 18 which is mounted in series with the reaping device 4 and the like and which detects the horizontal inclination of the machine frame 13 relative to the ground. Based on the results, the hydraulic cylinder devices 17 are expanded and contracted to control the machine frame 13 to adjust the horizontal and horizontal inclinations with respect to the chassis 12, so that the reaping device 4, the grain culm conveying device 5b, and the threshing section 6 maintain their relative positions at a constant level. A cutting height adjusting device for a combine harvester configured to be held at a position and rolled relative to a chassis 12.