JPH08266144A - Cutter for waste culm of combined harvester - Google Patents

Abstract

PURPOSE: To constitute a cutter of the short front and rear lengths and precisely slip down and guide cut straws cut with a pair of rotating tooth units from the side of an unreaped land to the side of an already reaped land. CONSTITUTION: This cutter 3 for waste straws of a combined harvester is obtained by oppositely installing rotating a tooth unit 31 installed on the downstream side of waste straw conveying in the rotating tooth units 30 and 31 of the cutter 3 for the waste straws for cutting the already threshed waste straws so as to locate at a lower level than that of the rotating tooth unit 30 on the upstream side of the conveying, installing a guide plate 5 for slipping down and guiding the cut straws cut with the rotating tooth units 30 and 31 from the side of an unreaped land to the side of an already reaped land under the rotating tooth unit 30 on the upstream side of the conveying within the cutting width and obliquely installing the lower end of the guide plate toward the side of the already reaped land. The top of the guide plate 5 is provided adjacently to the rotating teeth 30a of the rotating tooth unit 30.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a straw cutting device mounted on a rear portion of a thresher mounted on a combine.

[0002]

2. Description of the Related Art Conventionally, in the rear part of a threshing machine mounted on a combine, a disk type cutting device for cutting threshed straw is mounted by a pair of rotating teeth rotating inward with each other. A straw cutting device provided with a guide plate that guides a cut straw below a tooth body from the uncut side to the already cut side is already known in Japanese Utility Model Publication No. 52-123168. The guide plate is installed on the wall plate that is installed obliquely from the front side of the cutter machine frame toward the rear lower side, and is inclined below the one rotary tooth body side from the uncut ground side to the already cut ground side. .

[0003]

However, the straw cutting device according to the above-mentioned conventional structure is obliquely installed so that the upper end portion of the guide plate is positioned between the rotary teeth while being spaced from the rotary teeth. Since the straw cut by the pair of rotary teeth is easily caught by the upper edge of the guide plate, it does not promote the fall of the straw when a large amount of straw is cut. It has a drawback that it cannot be discharged well from the uncut ground side to the already cut ground side by accumulating on the guide plate, and that troubles such as clogging are likely to occur.

[0004]

In order to solve the above-mentioned problems, the present invention provides a disc-type cutting device for cutting threshed straw with a pair of rotating teeth that rotate inwardly toward each other.
In the straw cutting device mounted on the rear part of the threshing machine, a guide plate is provided for guiding the cut straw below the pair of rotary tooth bodies to slide down from the uncut ground side to the already cut ground side. The upper end of the plate is arranged close to the outer peripheral edges of the rotary teeth of the rotary tooth body, and the lower end is obliquely provided toward the cut ground side.

Further, it is characterized in that the guide plate is constituted by a vertical bottom surface formed on the upper end side and an inclined surface continuous with the vertical bottom surface.

[0006]

With the above-described structure, the threshed straw fed from the threshing machine 2 to the cutting device 1 is cut by the pair of inwardly rotating rotary tooth bodies 30 and 31, and the cut straw is cut. It is accurately taken over by the guide plate 5 provided in the vicinity of the outer peripheral edge of the rotary tooth 30a, quickly guided and dropped by the vertical lower surface 5a thereof, and reaches the lower inclined surface 5c. Is discharged toward the already-cutted land without causing stagnation or clogging.

[0007]

DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described with reference to the drawings. 1 and 2, A is a crawler type traveling device 1.
A combiner in which a thresher 2 and a not-shown reaper, a driver's seat, etc. are arranged in a well-known configuration on a machine base 1 provided with a, and a disk type cutting device according to the present invention is provided at the rear of the thresher 2. 3 is a rotation support portion 1b provided on the machine base 1 side.
And is mounted so as to be rotatable rearward about the rotation support portion 1b. And the combine A
Is threshing the grain culm cut by the mowing unit with the threshing machine 2, feeding the threshed straw to the cutting device 3 with the straw transport belt 20, and the cutting device 3 cuts the grain culm in the cutting direction. The cut straw is guided and discharged from the uncut land side to the already cut land side by a guide plate 5 described later.

The cutting device 3 has a pair of rotary teeth on the upper side and the lower side of the straw conveying direction in a machine frame 3d framed by front and rear walls 3a and 3b and both side walls 3c. Body 3
Rotating tooth bodies 30 are provided between the both side walls 3c so as to rotate inwardly with respect to each other, and are provided on the upstream side of conveyance.
On the other hand, the rotary tooth body 31 on the transport lower side is provided so as to be lower. As a result, the front-rear length of the cutting device 3 is shortened to shorten the entire length of the machine body, and the supply port 3e formed in the upper portion of the machine frame 3d is inclined rearward so that the supply port 3e can be opened and closed. When the opening / closing guide 32 axially attached to the switch is switched from the cutting open state shown by the solid line in FIG. 1 to the non-cutting closed state shown by the dotted line, the opening / closing guide 32 is inclined rearward along the supply port 3e, and the straw is discharged. The culms discharged from the conveyor belt 20 are allowed to pass through the cutting device 3 without being stagnant and smoothly guided and discharged.

Of the pair of rotary tooth bodies 30, 31, the rotary tooth body 30 on the upper hand side of conveyance is a large-diameter tooth receiving tooth 30 for scraping.
a and the small diameter receiving teeth 30b are arranged in a row on the rotating shaft 30c,
By supporting both ends of the rotary shaft 30c by a swing arm 33 pivotally supported by the side wall 3c so as to be swingable, the rotary tooth body 31 on the lower side of conveyance is actuated so that the rotary tooth body 31 can be adjusted to the perspective. The long cutting posture shown by the solid line and the short cutting posture shown by the dotted line are switchable so that the cutting length of the straw can be easily adjusted. That is, as shown in FIG.
0 is a suitable number of disc-shaped large-diameter receiving teeth 30a with a long cutting-interval H between the disc-shaped small-diameter receiving teeth 30b which are axially mounted on the rotary shaft 30c with a short cutting interval h. On the other hand, the rotary tooth body 31 is provided with the disc-shaped cutting teeth 31a having the same diameter on the rotary shaft 31c.
The large-diameter receiving teeth 30a and the small-diameter receiving teeth 30b, which are arranged in a row at 0, are arranged so as to be close to or in contact with each other correspondingly.

As a result, when the rotary tooth body 30 is operated in the short cutting posture, the large diameter receiving teeth 30a and the small diameter receiving teeth 30 are provided.
b is brought close to or in contact with each corresponding cutting tooth 31a of the rotary tooth body 31, so that the straw fed from the supply port 3e is cut accurately at a short cutting interval h. Further, by switching the rotary tooth body 30 to the long cutting posture, only the large diameter receiving teeth 30a are brought close to the corresponding cutting teeth 31a while the small diameter receiving teeth 30b are separated from the cutting teeth 31a. They are tangentially contacted with each other, and the straw is cut and adjusted at a long cutting interval H between them.

The outlet 3f of the cutting device 3 has
The straw cover 4 formed so as to surround the outer side of the straw cover 4 is attached, and the side wall 4a of the straw cover 4 on the uncut ground side is provided so that its lower end is inclined toward the cut ground side. The side wall 4b on the side of the already cut land is formed in a short drooping shape. In the discharge port 3f of the straw cover 4, a proper number of guide plates 5 and 5'for guiding the slide of the straw are provided below the middle part of the cutting width of the rotary tooth body 30 on the above-mentioned conveyance side. The threshing machine 2 has a predetermined interval and is attached in close proximity to the rear wall 2a side of the thresher 2 and is obliquely installed so as to incline from the uncut ground side to the cut ground side in rear view, and is cut as described above. The cut straw is discharged from the uncut land side to the ground on the already cut land side.

That is, the upper end portions of the guide plates 5 and 5'are formed on the hanging lower surface 5a for guiding the straw to drop in a substantially vertical shape, and the upper end portion 5b of the hanging lower surface 5a is formed on the rotary teeth. Body 3
An arc shape is formed in a shape along the outer peripheral edge of the large diameter tooth receiving tooth 30a of 0, and the inclined surface 5c connected to the hanging lower surface 5a descends from the uncut ground side toward the already cut ground side. Is configured. As a result, the large-diameter tooth 30a and the upper end 5b of the guide plate 5, 5'can be brought close to each other, and the cut straw immediately after cutting is not caught by the upper end 5b of the guide plate 5, 5'and accumulated in a bridge shape. In addition, the drooping surface 5a allows a wide drop space between the rotary tooth body 30 and the inclined surface 5c to allow the straw to drop directly below, and promotes the fall of the straw immediately after cutting. Therefore, it is possible to eliminate clogging and the like due to the accumulation of straw on the inclined surface 5c.

Of the guide plates 5, 5 '..., the guide plate 5 on the uncut side is attached to the front wall 3a of the cutting device 3 with a mounting screw 5.
The guide plate 5 ′ on the already-cutted ground side, which is formed so as to be detachable by means of 0, is detachably attached to the side rear plate 2 b connected to the rear wall 2 a of the thresher 2 by means of mounting screws 50. . Therefore, when the cutting device 3 pivots rearward about the pivotal support portion 1b, the guide plate 5 on the uncut ground side is formed.
Is rotated integrally with the cutting device 3, and the guide plate 5'on the side of the already cut ground is left on the rear face plate 2b side.

A discharge port 6a of a cross-flow dust removal fan 6 installed at the rear of the thresher 2 is opened in front of the straw cover 4 thus constructed on the uncut side, and the side walls 4a and 4a are provided. The straw slid down by the guide plate 5 and the straw that drops from the discharge port 3f are diffused and discharged toward the rear of the machine by dust wind. Reference numerals 21 and 38 denote covers for covering the straw conveying belt 20 and the cutting device 3, respectively.

The combine straw removing device constructed as described above is a cutting device in a cutting posture in which the threshing-completed straw that has been threshed by the threshing machine 2 is opened by the opening / closing guide 32 from the straw conveying device 20. 3 into a pair of rotary tooth bodies 30, 3
It cuts to a predetermined cutting length between 1 and discharges the cut straw from the uncut ground side to the cut ground side while guiding the cut straw to slide down by the guide plates 5 and 5 '. At this time, the straw cut by the pair of rotary tooth bodies 30 and 31 rapidly falls in the free-fall space formed by the hanging bottom surface 5a of the guide plates 5 and 5 ', and then falls on the lower inclined surface 5c. The inclined surface 5c can be smoothly discharged from the uncut land side to the already cut land side without causing stagnation or clogging. As a result, it is possible to suppress the fall of the straw toward the uncut area and to perform a good cutting operation.

[0016]

Since the present invention is constructed as described above, the following effects can be obtained. According to claim 1,
The upper end of the guide plate is provided below the pair of rotary teeth close to the outer peripheral edge of the rotary tooth, and the lower end is inclined toward the cut ground side, so that the straw just after cutting is guided by the guide plate. At the upper end of the plant, it will be guided to take over without stagnation, and will promptly slide down from the uncut land side to the already-cut land side for good discharge.

According to a second aspect of the present invention, by providing a vertical lower surface on the upper end side of the guide plate, the inclined surface connected to the vertical lower surface is separated from the rotary tooth body to induce the falling of the straw immediately after cutting and the inclined surface. Discharge the straw from the uncut area side to the already cut area side without stagnation.

[Brief description of drawings]

FIG. 1 is a side sectional view of a thresher equipped with a cutting device.

FIG. 2 is a rear cross-sectional view of FIG.

[Explanation of symbols]

 A combine 1 machine base 1a traveling device 2 threshing machine 20 waste conveyor belt 3 cutting device 30 rotary tooth body on the upper transfer side 31 rotary tooth body on the lower transfer side 30c, 31c rotary shaft 4 exhaust cover 5 guide plate 5a vertical surface 5b upper end 5c inclined surface

Claims (2)

[Claims] 1. A straw cutting device in which a disc-type cutting device for cutting threshed straw with a pair of rotating teeth that rotate inwardly toward each other is attached to the rear part of a threshing machine, wherein the pair of rotations is used. A guide plate that guides the cut straw to slide down from the uncut ground side to the already cut ground side is provided below the tooth body,
A combine straw discharging apparatus, wherein an upper end portion of the guide plate is brought close to outer peripheral edges of rotary teeth of a rotary tooth body, and a lower end portion is obliquely provided toward a cut-ground side. 2. A hanging bottom surface having a guide plate formed on the upper end side,
The combine straw cutting device according to claim 1, wherein the combine straw discharging device is formed by an inclined surface continuous with the hanging bottom surface.