JPH0138445B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a technology for improving a reaping device installed in an agricultural machine such as a combine harvester.

[Conventional technology]

As a reaping device installed in the above-mentioned combine harvester, etc., for example, as seen in Japanese Utility Model Application Publication No. 49-30425 and also shown in FIG. The front end of the tip movement locus Q of the star foil 21 is located above the clipper type cutting blade 22 for reaping the planted grain culm, and the movable blade 23 of the clipper type cutting blade 22 is reciprocated. A swinging arm 24 is provided biased to the non-raking side of the star wheel 21, and a bending link 25 for input to the swinging arm 24 is interlocked and connected to the rotating shaft 26 of the star wheel 21. be.

According to the configuration of such a reaping device, the front end of the tip movement trajectory Q of the star wheel 21 is located above the clipper-type cutting blade 22, so that the clipper-type cutting blade 22 immediately after reaping the planted grain culm. The reaped grain culm can be scraped with the star foil 21, and since the swinging arm 24 relative to the movable blade 23 of the clipper type cutting blade 22 is biased to the non-raking side of the starwheel 21, the swinging is possible. moving arm 2
4 does not get in the way of transporting the reaped grain culm, and has the advantage of effectively suppressing posture disturbances of the reaped grain culm.

[Problem to be solved by the invention]

However, in the reaping device configured as described above, since the swing shaft 27 of the swing arm 24 and the output shaft 28 of the swing arm 24 are open above the movable blade 23, the swing shaft 27 and the output shaft 28 of the swing arm 24 are open. axis 28
Furthermore, straw, grass, etc. tend to get wrapped around the swinging arm 24 itself, which not only lacks smooth operation, but also has the drawback that the wrapping of straw, etc. leads to a large drive loss.

Further, since the rotating shaft 26 of the star wheel 21 and the swinging arm 24 are interlocked and connected by a bent link 25, the swinging arm 24 is driven by the rotating shaft 26 of the star wheel 21. However, there was a drawback that the vibrations of the star wheel drive system were directly transmitted to the cutting blade drive system.

Furthermore, the length of the swinging arm 24 to the swinging free end (i.e., the length between the swinging arm 24 and the bent link 25
There is a difference in the length from the center of the connecting shaft to the center of the swinging shaft 27 and the length from the center of the swinging shaft to the center of the output shaft of the swinging arm 24 relative to the movable blade 23. Driving the movable blade 23 to increase its speed by the link 25 tends to cause strain, and combined with the fact that the drive system of the swing arm 24 has many pivot parts, the movable blade 23 This has the drawback that the smooth operation of the movable blade 23 is hindered, which in turn tends to cause the movable blade 23 to vibrate.

The present invention has been made in view of the above-mentioned circumstances, and it is an object of the present invention to provide a reaping device that eliminates the above-mentioned disadvantages at once through extremely rational improvement techniques.

[Means to solve the problem]

In order to achieve the above object, the present invention provides a star foil for scraping the grain culm immediately after reaping, and a clipper-type cutting blade for reaping the grain culm by planting the front end of the tip movement locus of the star foil in plan view. In the reaping device, the movable arm for reciprocating the movable blade of the clipper-type cutting blade is biased toward the non-raking side with respect to the star wheel. The movable blade drive extending portion of the arm in front of the swinging shaft is located in the space below the star foil, and the swinging shaft of the swinging arm is located below the disc-shaped solid portion of the starwheel. and the length from the center of the connection shaft of the input reciprocating rod to the swing arm to the center of the swing shaft is the length from the center of the swing shaft to the center of the output shaft of the swing arm to the movable blade. The feature is that the point is set to be approximately equal to .

[Effect]

According to the above characteristic configuration, since the movable blade drive extension portion of the swing arm and the swing shaft of the swing arm are covered with a star foil,
This effectively prevents straw debris and the like from being wrapped around the movable blade drive extension portion and the swing shaft.

In addition, since the swing arm is not driven by the rotating shaft of the star wheel, the vibration of the star wheel drive system is difficult to transmit to the cutting blade drive system, and the length of the swing arm to the free swing end is approximately The movable blade is driven equally and in a state where speed is not forced to increase, and the drive system of the swing arm has few pivot parts, so that the movable blade is smoothly operated. .

〔Example〕

An embodiment of the present invention will be described below with reference to the drawings.

The figure shows a 3-row combine harvester 10 to which the present invention is applied.
0, and the three triggering devices 1 from the front
A, 1B, 1C, reaping frame 2, clipper-type cutting blade (hereinafter referred to as cutting blade) 3 for cutting the raised planted grain culm, star foil 4A, 4B, 4C for scraping the grain culm immediately after that. , a lower conveying device that grips and conveys the raked grain culm at its base)
5A, 5B, upper conveying devices 6A, 6B that clamp and convey the tip side of grain culms, and a threshing device 7.

The reaping frame 2 basically consists of two vertical rods 2a, 2a' located on both sides of the machine body, and these vertical rods 2a, 2a'.
It consists of a cutting blade stand 2b installed as a bridge between 2a'.

At the rear of the cutting blade stand 2b, the support rod 8 is connected to the vertical rods 2a,
2a', and star foils 4A, 4B, 4C and conveying devices 5A, 5 are mounted on this support rod 8.
B, 6A, and 6B are supported. 4A', 4B',
4C' are rotation axes of star wheels 4A, 4B, and 4C, respectively.

In particular, the transport devices 5A and 6A are arranged behind the triggering devices 1A and 1B so that the moving direction of the aircraft is substantially the same direction, and the transport devices 5B,
6B extends from the rear of the triggering device 1C on the opposite side and is disposed to join the conveying devices 5A, 6A, respectively, and the star foils 4A, 4B, 4
The conveying device 5 is raked by C in two rows in an upright state.
Grain culms conveyed by A, 5B, 6A, and 6B are combined into a line at a confluence point P, and then conveyed to the rear.

Reference numeral 9 denotes a lifting and conveying device, which is provided at a position immediately after the confluence point P and the starting end of the feed chain 7a of the threshing device 7.

Next, the cutting blade 3 consists of a fixed blade 3a and a movable blade 3b, and is arranged so that the front ends of the tip movement loci Q of the star wheels 4A, 4B, 4C are above the cutting blade 3 in plan view. has been done.

The fixed blade 3a is fixed on the cutting blade stand 2b, and the movable blade 3b drive section is configured as follows. That is,
In the space below the star foil 4B located at the center in the left-right direction, more specifically, below the disk-shaped solid portion 4b' of the star foil 4B (inside the circle 4b indicated by the imaginary line in the figure), Said star foil 4B
A swing shaft 11 is located at a position biased toward the non-raking side with respect to the rotating shaft 4B' and within the disc-shaped solid portion 4b'.
A swinging arm 10 having an L-shape in plan view is provided so as to be able to reciprocate around the swinging shaft 11. The movable blade drive extending portion from the swing shaft 11 of the swing arm 10 to the movable blade 3b of the cutting blade 3 is configured to be located within the space below the star wheel 4B.

Further, a rod 13 that crosses below the lower conveyance device 5B is connected to one end of the swing arm 10 via a connecting shaft 15, and an output shaft is connected to the other end of the swing arm 10. 12 are connected to each other, and this output shaft 12 is connected to and engaged with an engaging member 16 connected to the movable blade 3b. and the length from the center of the swing shaft 11 to the center of the output shaft 12 are set to be substantially equal to each other.

The other end of the rod 13 is connected to the crankshaft 14.
As the crankshaft 14 rotates, the rod 13 reciprocates in its axial direction, causing the swinging arm 10 to swing back and forth about the swinging shaft 11. Movable blade 3b depending on the movement
is made to reciprocate in the left-right direction of the machine (horizontal direction perpendicular to the direction of movement of the machine), and the base of the planted grain culm is cut by the movable blade 3b and the fixed blade 3a. .

〔Effect of the invention〕

As explained above, in the present invention, the star foil serves as an upper cover for the swinging arm, and since almost the entire swinging arm is located on the non-pushing side of the starfoil, the cutting blades can be used to plant grain. The grain culm can be scraped with a star foil at the same time as the culm is reaped, and the posture of the grain culm after reaping is not disturbed.

〔Effect of the invention〕

As explained above, according to the reaping device of the present invention, the movable blade drive extension portion of the swing arm provided with the output shaft for the movable blade is covered by the star foil, and in particular, the swing arm The swing axis of the movable arm is covered by the disk-shaped solid portion of the star foil, so that it is effectively prevented that straw waste or the like gets wrapped around the movable blade drive extension part and the swing shaft. As a result, power loss is reduced and the efficiency of mowing work can be increased.

Furthermore, instead of driving the swinging arm by the rotating shaft of the starwheel as in the past, the swinging arm is driven by a reciprocating rod that is driven by a system separate from the starwheel drive system. As a result, it became difficult for the vibrations of the star wheel drive system to be transmitted to the mower blade drive system.

Moreover, the swing arm drive system has fewer pivot points than the conventional bending link.
By setting the length of the swinging arm to the swinging free end as described above, the movable blade can be operated smoothly and without difficulty, and as a whole,
In order to effectively suppress the disturbance of the posture of the reaped grain culm, the front end of the tip movement trajectory of the star wheel is positioned above the cutting blade, and the swinging arm for driving the cutting blade is positioned relative to the star wheel. By making simple improvements to the reaping device biased toward the non-raking side, the object of the present invention has been achieved.

[Brief explanation of drawings]

FIG. 1 is a plan view showing a combine harvester to which a reaping device according to the present invention is applied, and FIG. 2 is a plan view of a conventional reaping device. 3... Clipper type cutting blade, 3b... Movable blade, 4
A, 4B, 4C...Star foil, 4A', 4B',
4C'...Rotating shaft, 4b...Disc-shaped solid part, 10
... Swing arm, 11 ... Swing axis, 12 ... Output shaft, 13 ... Reciprocating rod for input, 15 ... Connection shaft, Q ... Tip movement locus.

Claims (1)

[Claims] 1. A star foil for scraping the grain culm immediately after reaping is provided with the front end of the tip movement locus of the star foil positioned above the clipper-type cutting blade for reaping the planted grain culm in plan view, and the clipper In a reaping device in which a swinging arm for reciprocally driving a movable blade of a type cutting blade is biased toward the non-raking side with respect to the star foil, the movable blade is driven forward of the swing axis of the swinging arm. The extension part for input is located in the space below the star foil, the swing shaft of the swing arm is located below the disk-shaped solid part of the star wheel, and the input part for the swing arm is The length from the center of the connecting shaft of the reciprocating rod to the center of the swing shaft is set to be approximately equal to the length from the center of the swing shaft to the center of the output shaft of the swing arm relative to the movable blade. A reaping device featuring: