JPS6134974Y2 - - Google Patents

Description

[Detailed explanation of the invention] (a) Industrial application field This invention rotates the upper raking wheel with a rotating shaft installed behind the reciprocating cutting blade, and cuts the raking wheel from the front side to the side. A reaping section of a combine that constitutes a conveyance path for reaped grain culms towards the side,
A bell-crank-shaped crank arm fitted so as to be swingable about the rotational shaft is transmission-connected at its front end to the cutting blade below the scraping wheel, and at the same time its side end extends from the rear. This invention relates to a drive device for a cutting blade that is operatively connected to a swinging rod for driving.

(b) Prior art The reaping section of a combine harvester configured as described above is
A conventional technique is disclosed, for example, in Japanese Utility Model Application No. 54-10839.

However, the structure shown in this publication itself has the drawback that the reciprocating motion of the cutting blade cannot be made smoothly, and it is not possible to cut the grass efficiently, reliably, and well.

(c) Problems that the invention aims to solve As described above, the conventional structure has the disadvantage that the reciprocating motion of the cutting blade is not smooth and it is not possible to reap efficiently, reliably, and properly. This invention was created with the aim of solving this problem and making the means of solving it rational.

(d) Means for solving the problem Therefore, in the present invention, the upper raking wheel is rotationally driven by a rotary shaft installed behind the reciprocating type cutting blade, and the cutting blade is cut from the front side to the side of the raking wheel. In the reaping section of the combine that constitutes the conveyance path for grain culms, a bell-crank-shaped crank arm fitted so as to be able to swing about the rotating shaft is placed below the raking wheel, and its front end is reaped. This objective is achieved by adding the configuration described below to a device that is transmission-connected to the blade side and whose side end portion is operatively connected to a swinging rod for driving that extends from the rear.

That is, a balance weight is integrally provided by extending rearward from the boss portion of the crank arm,
The balance weight is installed so as to be swingable within the rotation locus of the scraping wheel.

(E) Effect With this configuration, the crank arm swings below the raking wheel around the rotating shaft by the driving swing rod extending from the rear, and transmits power from the front end to the cutting blade side. The grain culms are harvested by reciprocating the cutting blade, and the harvested grain culms are sent rearward by a raking wheel, but when the crank arm swings, the balance weight becomes one with the crank arm. It swings and its inertia makes the reciprocating motion of the cutting blade smooth and does not interfere with the rearward feeding of the harvested grain culm. Moreover, the balance weight is covered with a raking foil, and straw debris falling from above is swept aside by the rotation of the raking foil, so that it does not wrap around the balance weight.

(f) Examples Next, the embodiment shown in the drawings will be described.

FIG. 1 shows a side view of the front part of the combine harvester, in which a threshing section D equipped with a feed chain 6, a culm 7, etc. is installed on the machine base supported by crawlers 5,
A reaping section C is installed in front of the threshing section D, and the reaping section C has grass dividing boards 8 arranged side by side in front, and each raising case 9 installed diagonally on the rear side thereof. A reciprocating type cutting blade A consisting of a fixed blade 10 and a movable blade 11 is installed horizontally at the rear lower part of the lifting case 9, straddling each of the reaping frames 12, 13, and 14. A scraping foil 2 is fitted and fixed to the upper part of the rotating shaft 1 which is erected, and
A scraping wheel 2a that meshes with each other is installed on the right side of the scraping wheel 2, and a lower conveying chain 15 extending rearward from above the scraping wheel 2 is installed so that it can be driven by the rotating shaft 1. A transport path R for the harvested grain culm is formed from the front side to the side of the raking foil 2,
Furthermore, a vertical conveyance chain 16 is provided extending from the rear of the lower conveyance chain 15 toward the starting end of the feed chain 6, and is configured similarly to the conventional structure.

A central boss portion 17 of a bell crank-shaped crank arm B is swingably fitted into the lower part of the rotating shaft 1 which is below the scraping wheel 2, and the front end of a forwardly protruding arm 18 of the crank arm B. A roll 2 is provided in such a manner that it does not protrude into the transport path R, and a roll 2 supported by a support shaft 19 is provided at the lower front end thereof.
The roll 20 is installed vertically in the rear recess 24 of the drive body 23 which is supported by a knife holder 21 and fixed to the knife bar 22 connecting the movable blades 11.
is fitted to connect the front end of the crank arm B to the cutting blade A side, and extends rearward from the boss portion 17 on the rear side of the arm 18. A balance weight 4 has a planar fan shape and has a tip that increases downward. are integrally formed, and the crank arm B and the balance weight 4 are installed below the scraping wheel 2 and within the rotation locus of the scraping wheel 2 so as to be able to swing around the rotating shaft 1. .

Further, above the tip of the arm 25 extending laterally of the crank arm B, the tip 3a of the swinging rod 3 extending from the rear is freely movably connected via a joint 26. The side end of the reaping section C is interlocked with the swinging rod 3 for driving, and the swinging rod 3 is connected to a crank 28 rotatably mounted on the side of the transmission case 27 at the rear of the reaping section C.
The rear end portions 3b of the two are transmission-connected via a pin.

Therefore, the swinging rod 3, which is swung by the crank 28 as shown by the arrow A, causes the crank arm B and the balance weight 4 to swing as shown by the arrow B, with the rotating shaft 1 as an axis. Therefore, the roll 20 on the crank arm B side is
The reaping blade 11 swings in the recess 24 of No. 3 and reciprocates as shown by the arrow C, so that the grain culm is reaped. The grains are sent from the rear along the transport path R by the lower transport chain 15 and are threshed in the threshing section D.

In this state, the crank arm B and the balance weight 4 swing together and exert a balanced driving force due to their inertia to smooth the reciprocating movement of the movable blade 11. The balance weight 4 does not interfere with the harvested grain culm being sent through the conveyance path R, and the raking foil 2
The straw that is located below and is covered by this scraping wheel 2 and falling from above is swept away to the side by the rotation of this scraping wheel 2 and is thrown onto the balance weight 4 and crank arm B. It doesn't wrap around.

(g) Effects of the invention As explained above, the present invention rotates the upper raking wheel using the rotating shaft installed behind the reciprocating cutting blade, and cuts the harvested grain from the front side to the side of the raking wheel. In the reaping section of the combine that constitutes the culm conveyance path, a bell-crank-shaped crank arm fitted so as to be able to swing about the rotating shaft is placed below the scraping wheel, with its front end facing toward the cutting blade. A balance weight is integrally provided with a side end connected to a driving swing rod extending from the rear, and extending rearward from a boss portion of the crank arm, and the balance weight is connected to the crank arm. Since it is configured so that it can swing freely within the rotational trajectory of the raking wheel, the inertial force of the balance weight can cause the crank arm to swing in a well-balanced manner, resulting in efficient and reliable mowing blade drive. It can be driven smoothly and smoothly, and the balance weight does not interfere with the harvested grain culm being transported through the transport path.

Moreover, since the balance weight is located below the raking foil and swings within the rotational trajectory of the raking foil, straw waste falling from above is covered by the raking foil and is not raked. As the wheel rotates, it is pushed aside and does not wrap around the balance weight, making it possible to maintain its inertial force.

[Brief explanation of the drawing]

The drawings show an embodiment of the present invention; FIG. 1 is a side view of the front part of the combine harvester, FIG. 2 is an enlarged view of a portion thereof, FIG. 3 is a plan view of the portion shown in FIG. 2, and FIG. A part of FIG. 3 is shown, and FIG. 5 is an enlarged view of a part of FIG. 2. A...Mowing blade, 1... Rotating shaft, 2... Scraping wheel, B... Crank arm, 3... Rocking rod,
4... Balance weight, C... Reaping section, R...
Conveyance path, 17...Boss section.

Claims (1)

[Scope of utility model registration request] Harvesting with a combine harvester that rotates an upper raking wheel 2 by a rotary shaft 1 installed upright behind a reciprocating cutting blade A, and extends to the front side of this raking wheel 2 to form a conveyance path R for harvested grain culms. In section C, a bell-crank-shaped crank arm B fitted so as to be able to swing about the rotating shaft 1 is connected below the scraping wheel 2 with its front end connected to the cutting blade A side. A balance weight 4 is integrally provided with an end thereof operatively connected to a driving swing rod 3 extending from the rear, and extending rearward from the boss portion 17 of the crank arm B. A driving device for a cutting blade in a cutting section of a combine harvester, characterized in that it is configured to be swingable within the rotation locus of a scraping wheel 2.