JPS5826289B2 - Combined harvester - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a reaping section elevating device in a combine harvester.

A combine harvester is known in which the height of the cutting section above the ground can be automatically adjusted by operating a hydraulic mechanism based on changes in the ground contact state of a sensing sled mounted near the cutting blades, but conventionally known One end of the detection sled body is rotatably supported on a horizontal axis on a fixed member (for example, a reaping frame) on the combine machine side, so that the free end side of the sled body is always free within a certain range in the vertical direction. It was designed so that it could oscillate, and its operation was transmitted to the switching part of the hydraulic mechanism for lifting and lowering the combine harvester's reaping section.Therefore, while the detection sled body was following the ground, it did not cause any trouble. , when the aircraft turns, etc.
When the reaping section is raised, the detection sled body in the free swinging state hangs downward and protrudes from the fixed member, which can cause problems such as husks, straw, or other objects getting caught. was.

Therefore, in the present invention, although the height of the reaping section can be automatically adjusted by operating the detection sled body, when the reaping section is raised when the aircraft turns, etc., the detection sled body always rises to the upper limit position. To provide a reaping part elevating device which is not supported and placed in a hanging protruding position and can avoid damage and danger due to engagement with shell culms, straw, and the like.

Next, the embodiment shown in the drawings will be described.

FIG. 1 shows a side view of the combine harvester, in which a threshing device B is mounted above a machine stand 5 installed above a crawler-type traveling body 4, and a reaping section A is installed in front of the threshing device B. On the right side, a control tube 6 is disposed at the front and a seat 7 at the rear to constitute a control section, and the machine base 5 rotates around a fulcrum 0 supported at the rear side of the traveling body 4. A hydraulic cylinder 8 which is pivotally supported and supported on the front side of the traveling body 4 is interposed between the machine base 5 and the machine base 5 rotates around the fulcrum O by the hydraulic operation of the hydraulic cylinder 8 to perform the reaping. Part A is configured to move up and down.

In the reaping section A, a grass cutting body 10 is obliquely attached to the tip of a reaping frame 9 that extends forward, a pulling device 11 is installed obliquely behind it, and a reaping blade 1 is installed astride the reaping frame 9 at the lower rear part. are installed horizontally, a lower conveyor 12 is installed from above the cutting blade 1 to the rear, and an upper conveyor tine 13 is installed above the lower conveyor 12, and the conveyance is transferred from the rear of the lower conveyor 12 to the starting end of the foot chain 14 of the threshing device B. A straw cutter 17 is installed at the rear of the threshing device B to serve as the terminal end of the straw removal chino 16.

2 is a long detection sled body with a U-shaped cross section, and its front end is attached to the front part of the cutting frame 9 on the grass cutting body 10 side with a horizontal pin 18.
The rear part of the sled body 2 extends to the side of the cutting blade 1, and a support rod 19 fixed to the front part of the sled body 2 on the center side holds the reaping frame 9. In this way, extend it upward.

Reference numeral 20 denotes an automatic transmission lifting/lowering transmitting device, which in this embodiment is composed of a push-pull wire of a known structure for both pushing and pulling. An operation box 24 is provided with a mounting portion 23 at one end, the tip of an operating rod 20a extending from the wire 20 is connected to the upper part of the support rod 19, and is fixed above the machine base 5 on the side of the seat 7. The other end of the push-pull wire 20 is connected inside.

In the operation box 24, an operating lever 3 that can be rotated about a fulcrum 25 is extended, and the other end operating rod 20b of the push-pull wire 20 is connected to an interlocking body 26 that can engage and detach the operating lever 3, A rod 27 is connected to a portion of the operating lever 3 near the fulcrum 25, and the rod 27 operates a control valve 28 that operates the hydraulic cylinder 8.
When the lever 3 is engaged with the interlocking body 26, the push-pull wire 20 is connected to the rod 27 side, making it an automatic type, and when the operating lever 3 is separated from the interlocking body 26 and operated independently, the rod 27 side can be operated manually. Configure it like this.

Further, a pin 29 fixed to the upper part of the support rod 19 is inserted into the elongated hole 31 of the interlocking body 30, and an inner wire 3 extending from the Bowden wire 32 connected to the support bar 22 is inserted.
The end of the inner wire 32a is connected to the interlocking body 30, the other end of the Bowden wire 32 is connected to the support metal 33 in the operation box 24, and the other end of the inner wire 32a extending from the end is connected to the operation lever. When the operating lever 3 is manually operated to raise the reaping section A to a certain height or higher, the sled body 2 is connected to the tip of the inner wire 32a.
can be raised to a rising position.

Therefore, when the operating lever 3 is engaged with the interlocking body 26 as shown in FIG. 4 during the combine harvester operation, the inner wire 32a is loosened and the interlocking body is moved as shown in FIG. 30 is lowered, and as the sled body 2 moves up and down, the pin 29 is set so that it can freely slide within the elongated hole 31.

Therefore, when the sled body 2 that is pressed downward by the pushing action of the push-pull wire 20 is in contact with the ground, the sled body 2 is lowered and the height of the cutting blade 1 is increased as shown by the imaginary line in FIG. If it becomes too much, push-pull wire 2
0 is pulled against the interlocking body 26 side, actuating the rod 27 via the operating lever 3, and further actuating the control valve 28, whereupon the hydraulic cylinder 8 is hydraulically actuated and rotates around the fulcrum O. Reaping part A together with machine stand 5
is in a lowered state, and the height of the cutting blade 1 is lowered and automatically adjusted to an appropriate cutting height.

On the other hand, if the sled body 2 rises too high and the height of the cutting blade 1 becomes too low as shown by the solid line in FIG. As a result, the control valve 28 is reversely operated, and the cutting section A is raised together with the machine base 5, and the height of the cutting blade 1 is raised to automatically adjust to an appropriate cutting height.

When manually raising and lowering the reaping section A, operate the operating lever 3, release it from the interlocking body 26, and directly actuate the rod 27 while rotating the lever 3 about the fulcrum 25 in Fig. 4 to reap. The elevation of section A and the height of cutting blade 1 can be adjusted manually.

By the way, regardless of whether the operating state is automatic or manual, when the aircraft turns, etc., the reaping section A must be raised high, as shown in Figure 6. When the control lever 3 is manually operated largely to one side, the reaping part A rises high, and at the same time, the inner wire 32a is pulled to one side by the end of the control lever 3, and the inner wire 32a is pulled as shown in FIG. The interlocking body 30 is pulled up, and the pin 29 engages with the lower part of the elongated hole 31, while the sled body 2 is rotated around the pin 18 and pulled up to the upper limit position where it contacts the reaping frame 9. As a result, as shown by the imaginary line in FIG. 3, the sled body 2 can be brought into a state in which it will not lower and get caught in shell culms, straw, or objects.

Furthermore, when lowering the reaping section A to return to the working state, the reaping section A can be lowered by rotating the operating lever 3 in the other direction, and at the same time, the inner wire 32a is loosened and the interlocking body 3
0 to the state shown in FIG. 5, that is, the sled body 2
can move up and down to automatically raise and lower the reaping section A.

In this way, the present invention operates the hydraulic mechanism depending on the grounding state of the detection sled body 2 provided in the vicinity of the cutting blade 1 to detect the cutting part A.
The combine harvester is configured such that the height of the reaping section A can be automatically adjusted, and an automatic lifting transmitter linked to the detection sled body 2 engages and disengages from the operating lever 3 for manually lifting and lowering the reaping section A. In addition, an interlocking device is provided between the operating lever 3 and the detection sled body 2 to allow the detection sled body 2 to be pulled upward and supported next to the manual lifting of the reaping section. Since the reaping section A can be raised or lowered by manual operation of the control lever 3, the reaping section A can be raised or lowered to a certain height when turning during combine harvester operation. If the manual operation is performed in step 3, the sled body 2 can be raised to the upper limit position and supported in conjunction with the operation, and the sled body 2 can be lowered and damaged by catching shell culms, straw, or objects. It has the feature that it can be operated without causing a dangerous situation, and that it can be operated easily in an interlocking manner without requiring a separate operation.

[Brief explanation of the drawing]

The drawings show an embodiment of the present invention, and Fig. 1 is a side view of the combine harvester, Fig. 2 is a schematic side view showing the main parts, Fig. 3 is a side view of a part of the reaping section, and Fig. 4 is a side view of the main parts. FIG. 5 is a side view of other important parts, and FIGS. 6 and 7 are explanatory diagrams of the operation of FIGS. 4 and 5, respectively. 1...Mowing blade, 2...Detection sled body, A
... Reaping section, 3 ... Operation lever.

Claims (1)

[Claims] 1 A combine harvester configured such that the height of the reaping part 4 can be automatically adjusted by operating a hydraulic mechanism depending on the grounding state of the detection sled body 2 provided in the vicinity of the cutting blade 1, and the detection sled body 2 An automatic lifting/lowering transmission device interlocked with the body 2 is provided so as to be connected to and disconnected from a control lever 3 for manually lifting and lowering the reaping section A, and also connects the control lever 3 and the detection sled body 2. A reaping section elevating device for a combine harvester, characterized in that an interlocking tool for lifting and supporting a detection sled body 2 upward is interposed next to manual lifting of the reaping section.