JPH0453482B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (a) Field of Industrial Application The present invention relates to a reaping device for a harvester that reaps and harvests grain culms and the like.

(B) Prior Art Conventionally, a reaping device is already known in which a harvester has a pair of clipper-type cutting blades on the left and right, and the movable blades of the cutting blades are each driven by a drive arm at the side.

(c) Problems to be Solved by the Invention In the reaping device of the known harvester, when the movable blade is pushed toward the opposite side of the drive unit located on one side, the movable blade is caused by cutting resistance and sliding resistance. Even if a blade holder is attached, the blade will bend and lift up from the fixed blade,
There are problems such as reduced cutting action and the possibility that straw and weeds may get caught between the movable blade and the fixed blade.Furthermore, since the drive arm is located on the side of the mower blade, the drive Grain culms, straw waste, weeds, etc. became entangled in the arm, creating resistance to operation and impeding the transportation of the harvested grain culms, which disturbed the posture of the grain culms.

(d) Means for Solving the Problems The present invention provides a clipper-type cutting blade that is attached to a reaping frame, and at least a pair of left and right movable blades, and a pair of movable blades at approximately the center in the longitudinal direction of the movable blades. , the rear part of the drive arm is connected to the reciprocating drive mechanism and tilted towards the center of the width of the machine, and the left and right movable blades are interlocked and connected so that they reciprocate in opposite directions. Blade holders are attached to each side, and above the drive arm,
By providing a raking wheel that rakes the grain culm toward the center in an engaged state and covering the drive arm with the raking wheel, sliding resistance is reduced when the movable blades of the left and right mowing blades slide from side to side. In addition, the above-mentioned problems are solved by preventing the grain culm from floating due to cutting resistance, and by preventing the reaped grain culm from passing over the drive arm because it is regulated by the star wheel type scraper.

(E) Action When the machine moves forward while driving each part, the cutting blades become shorter because they are paired on the left and right, and because they are driven at the center of each blade, they do not bend due to sliding resistance and cutting resistance. There is no lifting, the movable blade does not separate from the fixed blade, or straw or weeds do not get caught between them.
Good sharpness allows for reliable cutting.

In addition, although the drive arms of the movable blades are arranged as a pair on the left and right, they are each covered by a scraping body, so that the harvested grain culms that are scraped and the grain culms and weeds that adhere to the stock base are removed. It is extremely unlikely that the actuator will enter the operating range of the drive arm and become entangled.

(F) Embodiment To explain the embodiment shown in the drawings below, 1 is a threshing device mounted on one side of the machine base of the combine, and the other side of the machine base is equipped with an operation panel, a pilot's seat, and grain grain in order from the front. A tank, engine, etc. are provided. In addition, a grain culm conveying device 2 and a reaping device 3 are provided in front of the threshing device 1, and the reaping device 3 is connected to the grass cutting body 4...
..., a grain culm pulling body 5..., a cutting blade 6, a pair of left and right raking wheels 7, 7, a pair of left and right raking wheels 7, 7, forming a V-shape with the center at the rear, and stretched between the front and rear V pulleys 10, 10. The grain culm conveying device 2 is composed of grain side raking bands 8, 8 and a stock raking chain 9 whose front part is wound around a sprocket attached to the shaft of one of the raking wheels 7. Original pinching conveyor 11 and panicle side conveyor 1
2, and the stock clamping conveyor 11 is connected to the horizontal axis 1.
You can adjust the handling depth by moving it up and down around 3.

The cutting blade 6 is constituted by a pair of left and right clipper blades 14a, 14b shaped like a V-shape with the rear end at the center.
The inner ends of the fixed blades 15 of the blades a and 14b are attached to the brackets 1 that protrude from the middle support frame 16a of the reaping frame 16.
7, the outer end is fixed to the side frame 16b,
Each movable blade 19 is a supporting frame 15a of the fixed blade 15.
A drive arm 20 is fixed at approximately the center of the machine, and is held down by a pair of left and right blade holders 18, 18 screwed onto the machine. rod 2
2. The left and right movable blades 19, 19 are driven by a shaft 24 through a crank arm 23 to reciprocate separately and in opposite directions, and the shaft 24 is driven by a horizontal shaft having a pulley 25 through a vertical shaft 26. 27 and 28 are culm guides.

Further, the upper surfaces of the left and right drive arms 20, 20 and bell cranks 21, 21 are covered by scraping wheels 7, 7, respectively.

Next, to explain the operation, the grain culms to be planted in the field are divided by the weed cutting body 4 as the machine advances, and are also pulled up by the grain culm pulling body 5 and harvested by the left and right clipper blades 14a, 14b. .

At this time, the left and right clipper blades 14a and 14b cut both sides of the width of the machine in front of the center, and as they reach the center, they sequentially cut back in order. The rake path a in the center of the width of the machine is
The ear side is raked in an orderly vertical position from the ear side raking bands 8, 8 along the inclinations of the clipper blades 14a, 14b, respectively, diagonally toward the rear center in plan view.

During such a reaping operation, the clipper blades 14a, 1
The movable blades 19, 19 of the movable blades 19, 19 of the blades 4b have bells connected to their rear parts via drive arms 20, 20, which are fixed approximately in the center in the longitudinal direction and are inclined toward the engaging portions of the scraping wheels 7, 7. The movable blades 19, 19 are driven reciprocally by the cranks 21, 21, so the movable blades 6, 6 are short and are paired as a pair on the left and right, and the movable blades 19, 19 are fixed to a drive arm 2 fixed at approximately the middle part in the longitudinal direction.
0 and 20, the movable blade 1 is reciprocated from side to side, and the length of the pushing side portion is extremely shorter than the drive arm 20, so that even when cutting resistance is applied, it hardly bends and lifts up, and the movable blade 1
The improved adhesion of the fixed blades 9 and 19 to the fixed blades 15 and 15 and the fact that straw waste, weeds, etc. are not caught between them combine to ensure that the grain culm can be cut reliably and smoothly. .

Further, since the upper surfaces of the drive arms 20, 20 are covered by the raking wheels 7, 7, the stock base of the reaped grain culm, straw debris, weeds, etc. attached thereto are removed from the operating range of the drive arms 20, 20. The raking wheels 7, 7 can prevent the straw debris from getting entangled with the drive arms 20, 20.

The harvested grain culm that has been raked is sent to the threshing device 1 by the grain culm conveying device 2.

Furthermore, when the harvested grain culm is raked by the raking wheels 7, 7 and the ear side raking bands 8, 8, the left and right clipper blades 1
Mud and straw debris gets clogged between the central ends of the clipper blades 14a and 14b, but since there is a triangular gap 〓b between the central ends of the clipper blades 14a and 14b, the mud gets stuck together with the grain culms. The straw waste falls from the above-mentioned gap (b) and is not raked together with the grain culm, and since it is cut almost simultaneously with the raking by the ear-side raking band 8, the cutting height is kept approximately constant.

In the grain culm reaping process, the left and right movable blades 19,
19 reciprocate in opposite directions, so vibrations caused by these reciprocating movements can be canceled out. Further, when the clipper blade 14a or 14b is worn out, only that part needs to be replaced.

(G) Effects of the Invention The present invention includes the clipper-type cutting blade 6 as described above attached to the cutting frame 16, and at least the movable blades 19, 19 of the cutting blade 6 as a pair on the left and right,
A drive arm 20 whose rear part is interlocked with a reciprocating drive mechanism and is inclined toward the center of the width of the machine is attached to approximately the center in the longitudinal direction of these movable blades 19, 19, so that the left and right movable blades 19, 19 are interlocked so that they reciprocate in opposite directions, and each movable blade 1
Blade holders 18 and 18 are attached to both sides of the drive arms 9 and 19, respectively, and a raking wheel 7 is provided above the drive arm 20 for raking the grain culm toward the center in an engaged state. , 20 are covered by the star wheel type scraping wheels 7, 7, the movable blades 19, 19 are divided into left and right sides and become shorter.
Each movable blade 19, 19 is reciprocated by drive arms 20, 20 at its substantially central portion, and the portion of the movable blade 6 that receives the pushing action of the movable blade 19, 19 is caused by sliding resistance and cutting resistance, causing the blade holder 18 to It is possible to prevent the material from bending and floating between the material and the material, thereby improving the reaping performance.

In addition, it becomes possible to cover the connecting portions of the left and right drive arms 20, 20, especially the rear portions thereof to the reciprocating drive mechanism, with the axes of the scraping wheels 7, 7, thereby scraping the grain culms. Scratching into the interlocking part between the raking wheels 7, 7 while meshing with each other, the operating range of the drive arms 20, 20 prevents grain culms, straw waste, weeds, etc. from entering the reciprocating drive part at the rear of the drive arms 20, 20. It is less likely that straw waste or the like will get tangled or wrapped around the drive arms 20, 20, and as a result, the movable blades 19, 19
can be smoothly reciprocated over a long period of time, and the grain culm can be reliably raked in an orderly and well-aligned manner without any straw debris etc. that obstruct the movement of the stock base of the grain culm.

[Brief explanation of drawings]

The drawings show one embodiment of the invention,
Fig. 1 is a side view of the front part of the combine, Fig. 2 is a plan view of the reaping section, Fig. 3 is a plan view of the reaping section, Fig. 4 is a perspective view of a part of the cutting blade, and Fig. 5 is a plan view of the same as above. 6...Mowing blade, 7...Rake ring, 8...Ear side raking band, 9...Stump base raking chain, 16...Reaping frame, 18...Blade holder, 19...Movable blade, 20 ……
Drive arm, 21...Bell crank.

Claims (1)

[Claims] 1 Attach the clipper-type cutting blade 6 to the reaping frame 16 and at least the movable blade 1 of the cutting blade 6
9 and 19 as a pair on the left and right, these movable blades 1
A drive arm 20 whose rear part is interlocked with a reciprocating drive mechanism and is inclined toward the center of the width of the machine is attached to approximately the center in the longitudinal direction of 9 and 19, so that the left and right movable blades 19 and 19 are oriented in opposite directions. Blade holders 18, 18 are attached to both sides of each movable blade 19, 19, respectively, and a blade holder 18, 18 is provided above the drive arm 20 to direct the grain culm toward the center in an engaged state. A reaping device for a harvester, characterized in that a star wheel type raking wheel 7 is provided and the drive arms 20, 20 are covered by the raking wheels 7, 7.