JP2603751B2 - Waste straw cutter - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field] The present invention mounts a large number of first rotary blades on a first rotary shaft at a predetermined pitch, and attaches a predetermined number of the first rotary blades to another. A large number of second rotary blades having the same diameter are mounted on the second rotary shaft parallel to the first rotary shaft at the same pitch as the predetermined pitch. The distance between the second rotary shaft and the second rotary shaft is determined by the state in which the second rotary blade overlaps with all of the first rotary blades and the first rotary blade having a large diameter.
The present invention relates to a waste straw cutter configured to be freely switchable between a state in which it overlaps only with a rotary blade.

[Conventional technology]

Conventionally, in the waste straw cutter having the above-described configuration, there has been a configuration in which a cylindrical spacer member is interposed between the rotary blades, for example, as shown in Japanese Utility Model Application Laid-Open No. 64-26948. .

[Problems to be solved by the invention]

In the waste straw cutter having the above configuration, one of the rotating shaft bodies is slid by operation from the outside of the case, so that the cut length of the waste straw can be easily switched between two types, long and short.

However, in the above-described conventional configuration, when the cutting length is set to be short, the overlapping allowance of the large-diameter first rotary blade becomes large, so that the large-diameter first rotary blade and the second rotary blade facing the large-diameter first rotary blade at the cutting action point are used. The biting angle between the two becomes large. In such a state, for example, when cutting a straw for barley, even if a long straw cut at an intermediate position acting first tries to bite and cut with another rotary blade, the bite angle is large as described above. In some cases, the cut portion may rise upward with the cut portion facing downward, and may be jammed between the cover case. As a result, there is a possibility that a large number of long straws may be retained and the cutting action may be inhibited.

 An object of the present invention is to eliminate the above disadvantages.

[Means for solving the problem]

A characteristic configuration of the present invention is that a large number of first rotary blades are mounted on a first rotary shaft body at a predetermined pitch, and a predetermined number of the first rotary blades are configured to have a diameter larger than that of other first rotary blades. A large number of second rotary blades having the same diameter are mounted at the same pitch as the predetermined pitch on a second rotary shaft body parallel to the rotary shaft body, and the distance between the first rotary body and the second rotary shaft body is set to In a waste straw cutter, the two-rotation blade is configured to be freely switchable between a state in which the first rotation blade overlaps with all of the first rotation blades and a state in which the second rotation blade overlaps only with the first rotation blade having a large diameter. A scraping rotator for scraping out a protruding cut straw that extends radially outward from near the outer periphery of the first rotating shaft at a lateral portion of the large-diameter first rotating blade in the one rotating shaft. Is located.

(Operation)

In a state in which the second rotary blade overlaps only the large-diameter first rotary blade, the waste straw is cut at the foremost cutting action position at an intermediate position in the longitudinal direction, and the first rotary blade and the second rotation are cut at other cutting action positions. Due to the large bite angle with the blade,
With the foremost cut point down, even when trying to stand up in a long state, the foremost cut point of the long straw entering the radially inward side between the first rotary blades is the Since the scraping rotator is forcibly scraped, the long straw does not stay and no clogging occurs with the cover case.

〔The invention's effect〕

Therefore, according to the present invention, while the cutting length can be freely switched to a plurality of types by a simple configuration, the clogging of the long straw caused by the increase in the bite angle of the rotary blade due to the adoption of the configuration can be prevented. The generation can be prevented by a simple structural improvement simply by adding a simple member.

〔Example〕

 Hereinafter, embodiments of the present invention will be described with reference to the drawings.

FIG. 2 shows a waste straw cutter according to the present invention.
The waste straw cutter is connected to the rear part of the threshing device (1) mounted on the combine, and is configured to cut the waste straw after threshing to a predetermined length and discharge it to the field.

The waste straw cutter includes a number of first rotary blades (2),
A first rotating shaft (3) composed of a first drive shaft (3A) and a first spacer member (3B) is mounted at a predetermined pitch (P) on the first rotating shaft body (3), and the first rotating blades (2) are provided at predetermined intervals. A plurality of second rotary blades (5) having the same diameter are formed on a second rotary shaft (4) parallel to the first rotary shaft (3) and having the same diameter as the predetermined pitch (P). At the same pitch as
The interval between the rotating shaft body (3) and the second rotating shaft body (4) is set such that the second rotating blade (5) overlaps with all the first rotating blades (2) and the second rotating blade (2). 5) is configured to be freely switchable to a state in which it overlaps only with the large-diameter first rotary blade (2). More specifically, as shown in FIG. 1, each of the rotary blades (2) and (5) includes a spacer member (3B),
Externally mounted on each of the drive shafts (3A) and (4A) via (4B), and a scraping guide (7) is provided on the side of the second rotary blade (5) so as to be integrally rotatable. is there. Then, every other first rotary blade (2) is configured to have a larger diameter than the other rotary blades, and all the first rotary blades (2) are second rotary blades (5).
By overlapping, the waste straw can be cut at a short pitch (see FIG. 4), and by overlapping only the large-diameter first rotary blade (2) and the second rotary blade (5), The waste straw can be cut at a longer pitch (see FIG. 1). That is, the second drive shaft (4A) of the second rotary shaft body (4) supporting the second rotary blade (5) is pivotally mounted on the left and right side wall portions of the cutter case (8) around the horizontal axis. Bearings are supported by the supported rocking member (9), and the left and right rocking members (9),
(9) is configured so that the rocking end can be freely adjusted by switching to the two states as described above by a bolt (11) inserted through the elongated hole (10) on the rocking end side.

Each of the rotating shafts (3) and (4) is configured to be driven by supplying power from a threshing device (1) via a transmission belt (12). The transmission belt (12) is wound around a driven pulley (13) attached to the first rotating shaft body (2), and the driven pulley (13) is configured as a split pulley type and has a movable pulley (13a). Is slid by a climbing cam mechanism (15) operated by an electric motor (14) to change and adjust the pulley interval and to change its rotation speed steplessly. According to the detection result of the detection sensor (S) for detecting the upper and lower different amounts corresponding to the grain culm processing amount of the sandwiching rail (17) opposed to the chain (16), the control device (18) controls the electric motor ( 14)
Is configured to be drive-controlled.

Further, the first rotating shaft body (3) and the second rotating shaft body (4)
The second rotary shaft body (4) is rotationally driven at a lower speed than the first rotary shaft body (3), being linked and connected by a gear transmission mechanism (19).

As shown in FIG. 3, the first rotary shaft body (3) is provided at the lateral side of the large-diameter first rotary blade (2) on the side of the waste stirrup stock in the first rotary shaft body (3). A scraping rotator (20) for scraping out a protruding cut straw extending radially outward from near the outer periphery of 3) is provided. The scraping rotator (20) is fixedly fastened by bolts (21) to a divided body (20a) which is divided into three so that the rotator (20) can be attached to the outer periphery of the first spacer member (3B) from the outside. It is configured to do.

By providing the scraping rotary member (20) in this manner, the bite angle of each of the rotary blades (2) and (5) increases when cutting a relatively hard and fragile wheat stalk at the above-described short pitch. Even if it is cut off in the middle and tries to stand up as it is long, such a long straw can be prevented from staying by the scraping-out rotating body (20).

In the claims, the reference numerals are used to facilitate comparison with the drawings, but the present invention is not limited to the configuration shown in the attached drawings.

[Brief description of the drawings]

The drawings show an embodiment of a waste straw cutter according to an embodiment of the present invention. FIG. 1 is a cutaway rear view, FIG. 2 is a side view, FIG. 3 is a cross-sectional view of a scraping rotary member disposition portion, FIG. Is a rear view at the time of short pitch cutting. (2) ... first rotary blade, (3) ... first rotary shaft,
(4)... Second rotary shaft, (5)... Second rotary blade, (2
0)… Scraping rotator, (P)… Pitch.

Claims (1)

(57) [Claims] 1. A plurality of first rotary blades (2) are mounted on a first rotary shaft body (3) at a predetermined pitch (P), and a predetermined number of said first rotary blades (2) are replaced with another. A plurality of second rotary blades (5) having the same diameter are formed on the second rotary shaft (4) parallel to the first rotary shaft (3) and have the same pitch as the predetermined pitch (P). And the distance between the first rotary shaft body (3) and the second rotary shaft body (4) is set such that the second rotary blade (5) overlaps with all the first rotary blades (2). And a waste straw cutter configured to be switchable between a state in which the second rotary blade (5) and only the large-diameter first rotary blade (2) overlap with each other, wherein the first rotary shaft body (3). In the lateral portion of the large-diameter first rotary blade (2), a protruding cutting straw scraping extending radially outward from near the outer periphery of the first rotary shaft body (3). Waste straw cutter rotating body (20) are arranged scraping of use.