JPH0233486Y2 - - Google Patents

Description

[Detailed description of the invention] [Industrial field of application] This invention uses a rotary plate having cutting edges at multiple locations in the circumferential direction of the rotating outer periphery, which are arranged side by side in the axial direction of the rotating shaft, like a straw cutter attached to a combine harvester. The present invention also relates to an agricultural cutter comprising a rotary cutter blade having a spacer-cum-wrapping prevention cylinder interposed between adjacent rotary plates, and a fixed receiving blade disposed opposite to the rotary cutter blade.

[Conventional technology]

In conventional agricultural cutters of this type, the outer peripheries of each of the rotating plates and the wrapping prevention barrel are each formed into a circular shape. That is, as shown in FIG. 8, the outer periphery 06b of the rotary plate 06 and the outer periphery 07b of the anti-wrapping barrel 07 connect the mounting base ends of the cutting blades 05 that are adjacent to each other in the circumferential direction when viewed in the direction of the rotation axis. It was located protruding outward in the radial direction from the line (for example, Japanese Utility Model Application Publication No. 167638/1983).

[The problem that the idea aims to solve]

When the stem culm is dropped and supplied to the outer periphery 06b and the outer circumferential surface described above, a radially outward extrusion force acts on the stem culm, making it difficult to bite the stem culm into the action portion of the rotating cutter blade 03. , there was a risk that the cutting capacity would decrease.

In view of the above circumstances, the present invention improves the cutting capacity by making simple modifications to the rotary plates and the wrapping prevention body to improve the biting of the stem culm into the rotary cutter blade acting part. The purpose is to provide something that can achieve the following goals.

[Means for Solving the Problems] A characteristic configuration of the agricultural cutter according to the present invention, which has been made to achieve the above object, is that the outer periphery of each rotary plate and the outer circumferential surface of the anti-wrapping barrel are viewed in the direction of the rotational axis. The cutting blades are configured to be located closer to the rotation axis than a line connecting the mounting base ends of adjacent cutting blades in the circumferential direction.

The effects of the present invention having such a characteristic configuration are as follows.

[Effect]

In other words, since the outer periphery of each rotary plate and the outer circumferential surface of the anti-wrapping cylinder are located closer to the rotational axis than the line connecting the mounting base ends of adjacent cutting blades in the circumferential direction, In comparison with the conventional example, the rotational extrusion force exerted outward in the radial direction by the outer periphery and outer circumferential surface against the naturally falling stem culm is reduced, and the height of the cutting edge (bosom) is reduced. I try not to let the stem culm I push inside escape.

[Effect of idea]

Therefore, it not only improves the biting of the stem culm into the cutter action area, but also suppresses the movement of the stem culm toward the fixed receiving blade side, which itself has poor ability to scrape the stem culm, which inevitably improves the cutting capacity. I was able to make improvements.

〔Example〕

Hereinafter, embodiments of the configuration of the present invention will be described based on the drawings.

As shown in Figure 1, there is a reel 1 that scrapes the planted grain culms toward the rear of the machine, a cutting blade 2 that reaps the raked grain culms, and a cutting blade 2 that receives the harvested grain culms and collects them toward the center in the width direction of the machine. A reaping section 10 equipped with a conveyor 9 for conveying harvested grain culms to the rear of the machine with the ears in front is provided at the front of the machine so as to be movable up and down. A device 11 for threshing the harvested grain culm and a tank 12 for recovering the grain after the threshing process are provided at the rear of the machine, and furthermore, a crawler traveling device 13 and an operation control section S are provided.
The combine harvester is equipped with a full-culm input threshing type combine harvester.

The threshing device 11 includes a pair of beaters 16, 16 for discharging the processed material after threshing in the handling room 14 to the sorting section 15, and the sorting section 15 further includes: A straw transports the processed material discharged from the handling chamber 14 to the rear, sorts out grains, branch straw with grains, etc. and drops them downward, and swings the waste straw to the dust outlet 17. A rack 13 is provided. The dust outlet 17 is provided with a straw cutter.

The waste straw cutter consists of a rotary cutter blade 3 and a fixed receiving blade 19, and the rotary cutter blade 3 will be explained. The cylindrical boss 6a to the rotating shaft 4 is placed at the axial center position, and the rotary plate 6 on which the cutting blades 5 are bolted at multiple locations in the circumferential direction of the rotating outer periphery is juxtaposed in the axial direction of the rotating shaft 4, and adjacent to each other. rotating plates 6, 6
A winding prevention cylinder 7 which also serves as a spacer is interposed between them.

The outer periphery 6b of each rotary plate 6 and the outer circumferential surface 7b of the anti-wrapping cylinder 7 are rotated relative to a line connecting the mounting base ends of circumferentially adjacent cutting blades 5, 5 when viewed in the direction of the rotation axis. It is configured to be located on the axis side. Therefore, the rotational extrusion force exerted by the outer periphery 6b and the outer peripheral surface 7b on the stem culm in the radial outward direction is reduced, the stem culm can be better bitten into the cutter action part, and the cutting capacity is increased. be able to. Further, the outer circumferential surface 7b of the wrapping prevention cylinder 7 is provided with a plate-shaped portion 7a that protrudes in the radial direction.
is provided to improve the scraping of waste straw.

The rotating shaft 4 of the rotating cutter blade 3 is connected to the outer plate 2.
4, and a belt transmission pulley 25 is externally fitted to the tip thereof to link with a drive source (not shown).

FIGS. 6 and 7 show another embodiment of the cutting blade 5, which is shaped like a flat plate and has a bent tip and a bent side end, respectively, to increase the force of discharging straw. I can do it.

A waste straw guide plate 18 constituting a discharge path is supported below the straw rack 13 so as to be swingable around the horizontal axis X, and a fixing member (described later) that is in contact with the lower end of this guide plate 18 when the waste straw is shredded A receiving blade 19 mounting stand 20 is provided. On the side of the cutting blade 5 of the mounting base 20, a stationary receiving blade 19 having a U-shape when viewed from above is attached such that the cutting blade 5 is positioned in an internal space formed by the U-shape so that the cutting blade 5 rotates therethrough. It is being
The mounting base 20 is swingably supported around a horizontal shaft 21, and a switching lever 22 and an interlocking lever 23 are pivotally extended from the horizontal shaft 21, and the interlocking lever 2
The free end of 3 is slidably engaged with a guiding elongated hole 26 formed in the outer plate 24. By operating the switching lever 22, the fixed receiving blade 19 can be oscillated between a cutting position and a non-cutting position. In addition, the horizontal shaft 21 is arranged on the side 20a of the mounting base 20 so that the width of passage of the waste straw is larger when the fixed blade 19 is in the non-cutting position than when it is in the cutting position.
It is located closer to the lower side 20b.

The fixed blade 19 mounting side 20a of the mounting base 20 is formed in the shape of a rib that protrudes toward the fixed receiving blade 19,
This prevents straw from accumulating on the upper end of the fixed receiving blade 19.

[Brief explanation of the drawing]

The drawings show an embodiment of the agricultural cutter according to the present invention, and FIG. 1 is a side view of the combine harvester, and FIG. 2 is a side view of the combine harvester.
Fig. 3 is an enlarged partially cutaway vertical sectional side view of the main part of the figure, Fig. 3 is an enlarged longitudinal sectional front view of the main part partially cut away, Fig. 4 is an exploded perspective view,
Fig. 5 is an enlarged vertical sectional side view of the main part of Fig. 2, Figs. 6 and 7 are perspective views showing another embodiment of the cutting blade, and Fig. 8 is an enlarged longitudinal sectional side view of the conventional example with a partially cut away main part. It is a diagram. 3... Rotating cutter blade, 4... Rotating shaft, 5... Cutting blade, 6... Rotating plate, 7... Wrapping prevention body, 19...
Fixed blade.

Claims (1)

[Scope of utility model registration request] Rotary plates 6 having cutting blades 5 at multiple locations in the circumferential direction of the outer circumference of the rotation are arranged side by side in the axial direction of the rotating shaft 4, and a winding prevention cylinder 7 which also serves as a spacer is interposed between adjacent rotary plates 6, 6. Rotating cutter blade 3
and a fixed receiving blade 19 disposed opposite to the rotary cutter blade 3. In this agricultural cutter, the rotating cutting blade 3 rotates around the outer periphery 6b of each rotary plate 6 and the outer peripheral surface 7b of the wrapping prevention barrel 7. An agricultural cutter configured to be located closer to the rotational axis than a line connecting the mounting base ends of circumferentially adjacent cutting blades 5, 5 when viewed in the axial direction.