JP2935978B2 - Combine blade drive - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a combine cutting blade driving device capable of driving a reciprocating upper blade and a lower blade for cutting a grain stem.

[0002]

2. Description of the Related Art Conventionally, for example, Japanese Utility Model Application Laid-Open No. 58-170925.
JP, JP-A-54-10839, JP-A-56-10839
As disclosed in Japanese Patent No. 131843, the lower blade of the clipper-type cutting blade is fixed, and the upper blade is configured to slide back and forth.

[0003]

For this reason, in a machine which increases the size of the machine to enable multi-row cutting, the cutting width becomes large. Therefore, in the conventional cutting blade structure of the combine, vibration becomes large and There was a problem that a twist or the like occurred. In addition, in order to reduce vibration and the like caused by the cutting blade drive, it is conceivable to drive the upper blade and the lower blade in opposite directions. In such a case, a plurality of cutting blade drive members must be provided. However, there is a problem in that the transported grain stem hits the cutting blade drive mechanism, which hinders the transport of the grain stem, or that the cutting blade drive mechanism is wrapped with straw or the like, which causes an obstacle to the cutting blade drive.

[0004]

SUMMARY OF THE INVENTION The present invention has been made in order to solve the above-mentioned problem, and in a combine having a clipper-shaped cutting blade comprising an upper blade 1 and a lower blade 2 which are reciprocally movable,
Knife heads 4 and 5 are connected to the rear portions of the upper blade 1 and the lower blade 2, respectively. Swing rods 17a and 17b which are driven by rear transmission cases 16a and 16b and extend forward are connected to the knife heads 4 and 5, respectively. Bell crank 14 that drives left and right sliding 5
A cutting blade drive mechanism, which is in transmission cooperation with each of the other ends of a and 14b, is arranged outside the passage width W through which the grain stalk squeezed by the scraping wheel 3 passes and in the rear back of the outermost raising case. It is configured as follows.

[0005]

Next, an embodiment shown in the drawings will be described.
1 to 4, FIG. 3 shows a part of a reaping portion of the combine, and a clipper including an upper blade 1 and a lower blade 2 below six reaping frames 6 extending in the front-rear direction. The cutting blades are provided horizontally, and five raising cases 7 are arranged side by side in the front part. On the upper side of the cutting blades, five squeezing wheels 3 extending obliquely forward respectively are provided. And transfer chains 9, 10, 11 rearward from the left and right and center scraper wheels 3.
Are respectively extended, and are configured in the same manner as the conventional structure so that multiple cutting can be performed.

The upper blade 1 and the lower blade 2 of the cutting blade are vertically overlapped with each other and supported by six knife retainers 12, so that the upper blade 1 and the lower blade 2 are erected. Is formed so as to be wider than the passage width W of the cereal stem stalked by each raking wheel 3, and the upper side which is in the outer direction of the passage width W and is on the rear side of the outermost raising case. A knife head 4 extending upward and rearward is continuously provided at a rear end of one end of the blade 1, and a lower end of the upper blade 1 is located at a lower end of the other end of the passage width W in an outer direction and an outermost end. A knife head 5 extending upward and rearward is continuously provided at a rear portion of one end of the lower blade 2 on the rear side of the raising case.
In addition, U-shaped recesses 4a,
5a, respectively, and bell cranks 14a, 14 of the upper blade 1 which are pivotally supported by the support frames 13a, 13b and are oriented in the upper direction.
The rollers 15a and 15b, which are pivotally supported at the leading end of the rear transmission case 16a, are fitted into the U-shaped recesses 4a and 5a, respectively.
a, a swinging rod 1 driven forward by 16b and extending forward
7a, 17b are connected to the bell cranks 14a, 14b.
The other end of b is connected to the transmission.

Therefore, the upper blade 1 and the lower blade 2 are driven by the knife heads 4 and 5 from one end thereof, respectively. And the sharpness is good, and the culm can be cut off. In this state, the knife heads of the upper blade and the lower blade are respectively located at positions outside the width of the grain stem passage and behind the outermost raising case, so that the grains scraped by the raking wheels 3 are arranged. The culm does not hit the knife heads 4 and 5 on both ends, and is consequently scraped and conveyed.

FIG. 5 shows another example, which is constructed in substantially the same manner as the above-mentioned embodiment, as indicated by the same reference numerals. The lower knife head 5 is attached close to the grain stalk aisle side, and the grain stalk is
, So that the stock is not paid and is scraped.

[0009]

As described above, the present invention relates to a combine having a clipper-shaped cutting blade composed of an upper blade 1 and a lower blade 2 which are reciprocally movable. , 5 are connected in series, and the rear transmission case 16a,
Swing rod 17 driven forward by 16b and extending forward
a, 17b is connected to the other end of each of the bell cranks 14a, 14b for slidingly driving the knife heads 4, 5 by a cutting blade drive mechanism. Since it is arranged outside the width W and inside the rear back of the outermost raising case, the grain that is raked by the rake wheel 3 while having a plurality of drives for low vibration. The culm is satisfactorily scraped without hitting the cutting blade drive mechanism such as the knife head 4, 5 bell cranks 14a, 14b and the swinging rods 17a, 17b, so that the culm can be conveyed without disorder. . In addition, it is possible to prevent grain stalks and straw chips conveyed to the cutting blade drive mechanism from being involved as much as possible.

[Brief description of the drawings]

FIG. 1 is a plan view of a cutting blade according to an embodiment of the present invention.

FIG. 2 is a front view of a part thereof.

FIG. 3 shows a part of a harvester of the combine.

FIG. 4 is an enlarged view of a part of FIG.

FIG. 5 shows another example.

[Explanation of symbols]

 Reference Signs List 1 upper blade 2 lower blade 3 scraping wheel W passage width 4, 5 knife head

Claims (1)

(57) [Claims] 1. An upper blade 1 and a lower blade 2 which are reciprocally movable.
In the cutting section of the combine having the clipper-shaped cutting blades , knife heads 4 and 5 are provided at the rear of the upper blade 1 and the lower blade 2 respectively.
And are driven by rear transmission cases 16a and 16b.
Swinging rods 17a and 17b extending forward by
A bell crank 14 for driving the heads 4 and 5 to slide left and right.
Cutting blade drive mechanism that is driven and linked to the other end of each of a and 14b
To the passage width W through which the grain stalks scraped by the scraping wheel 3 pass.
On the rear side of the outermost raising case.
A combine blade driving device for a combine.