JPH0422957Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a rotary blade in an agricultural cylinder-type cutter. More specifically, the present invention relates to an improvement in the rotary blade of an agricultural cylinder-type cutter for cutting feed crops such as straw culms and grass, or compost materials such as grass and twigs.

[Prior Art] As shown in FIG. 1, a fixed blade 2 is fixedly installed in a cutting chamber 1 of an agricultural cylinder-type cutter A at a position facing the lower edge of a supply port 10 of the cutting chamber 1. The rotary blades 3 are installed in the cutting chamber 1 at both ends of the main shaft 4, which passes through the center of the cutting chamber 1 in the left and right directions and is pivotally supported on the machine frame a. A pair of blade mounts 5, 5 are installed so as to face each other, and the rotary blade 3 is placed between the blade mounts 50, 50 installed at the rotating ends of the blade mounts 5, 5. The both ends of the knife mounting seat 50,
50, set bolts 51, 5 as shown in FIG.
It is installed by assembling according to step 1.

The rotary blade 3 assembled and attached to the blade mounts 5, 5 has an inclined blade surface 30 on its blade edge portion 30.
The blade alignment with respect to the rotary blade 3 is adjusted so that the blade edge 30b formed at the tip of the blade a rotates by rubbing against the blade edge 20 of the fixed blade 2 fixedly assembled to the machine frame a.

This blade alignment adjustment is performed by moving the rotation locus w of the blade edge 30b of the rotary blade 3, which rotates together with the blade mounts 5 and 5 with the rotation of the main shaft 4, toward or away from the blade edge 20 of the fixed blade 2. Usually,
A bearing support member (not shown) that pivotally supports both ends of the main shaft 4 is released from being fixed to the machine frame a, and the bearing support member is fixed to the machine frame a in the longitudinal direction (in Figs. 1 and 3). With the main shaft 4 in a state where it can freely slide in the left-right direction), the rotary blade 3 is moved by manually operating the main shaft 4 idly, and while checking the contact of the blade edge 30b with the cutting edge 20 of the fixed blade 2, slide the bearing support member. The blade mounts 5 and 5 are displaced back and forth with respect to the machine frame a, thereby changing the rotation locus w of the blade edge 30b of the rotary blade 3 to the fixed blade 2 as shown by the symbol w' in FIG. This is done by moving the blade forward and backward relative to the cutting edge 20 of the blade.

[Problem to be solved by the invention] By the way, the blade alignment adjustment performed in this way may cause misalignment during actual cutting work, and as a result, the blade edge of the rotary blade 3 may be distorted. 30 interferes with and meshes with the cutting edge 20 of the fixed blade 2, resulting in a problem that the fixed blade 2 becomes unrotatable. and,
This problem arises because in order to reduce the cutting resistance when cutting the rotary blade 3, the rotary blade 3 is
This becomes severe when the blade is formed into a so-called twisted blade that is obliquely inclined with respect to the axial direction of the main shaft 4.

[Means for solving the problem] The present invention aims to solve this problem, and was made based on the knowledge obtained as a result of various studies to solve the above problem. It is something.

That is, the above-mentioned problem was solved after various studies and studies, and as shown in Fig. 3, the rotary blade 3 rotates with a predetermined rotation trajectory w by adjusting the blade alignment, and cuts the material y to be cut. When the cutting edge 30 of the rotary blade 3 cuts into the material y to be cut in a wedge shape with its inclined blade surface 30a, the cutting edge 30 receives a reaction force from the material y to be cut. , the cutting edge portion 3 of the rotary blade 3
0 is pressed from the side of the inclined blade surface 30a as shown by arrow A, and the blade of the rotary blade 3 is assembled and set into the blade mounting seats 50, 50 of the blade mounting brackets 5, 5 by the set bolts 51, 51. 3a receives a force that causes it to rotate counterclockwise about the imaginary line Z connecting the set bolts 51, 51, as shown by the thin arrow in FIG. The blade edge portion 30 of the blade is attached to the blade mounting seat 50,5.
0 and expands the diameter of the rotational locus of the cutting edge 30 around the main shaft 4, thereby shifting the rotational locus of the cutting edge 30 of the rotary blade 3 toward the fixed blade 2. It has become clear that this is due to the fact that

From this, as shown in FIG. 4, on the rear half side of the blade 3a of the rotary blade 3, which is located behind the set bolts 51, 51 in the direction of rotation by the main shaft 4, the left and right A protruding portion 31 that extends a portion located in the free space between the blade mounts 5, 5 toward the rear in the rotational direction of the main shaft 4 and gradually projects toward the main shaft 4 side and inward of the rotation locus w.
When cutting the material y to be cut, the rear end side of the blade 3a of the rotary blade 3 cuts the material to be cut, as shown by the arrow B in FIG. When I made it receive a large reaction force from the cutting material y,
The blade 3a of the rotary blade 3 rotates clockwise in FIG. 4 about the imaginary line Z connecting the set bolts 51, 51 due to the reaction force received by the protrusion 31, and the blade 3a of the rotary blade 3 rotates clockwise in FIG. The cutting edge portion 30 of the rotary blade 3 is pushed back in the direction away from the fixed blade 2 as shown by the arrow C in FIG. The cutting edge portion 30 of the rotary blade 3 and the cutting edge 20 of the fixed blade 2 cancel out the reaction force that is pushed from the inclined blade surface 30a side toward the fixed blade 2 side during cutting. This is because results were obtained that could effectively prevent meshing.

Therefore, in the present invention, the blade mount is attached to a part of the main shaft that passes through the center of the cutting chamber from side to side, and is attached to a part located inside the cutting chamber, along the length of the blade in the axial direction of the main shaft. and both ends of the blade,
In a rotary blade of an agricultural cylinder-type cutter that is assembled by a set bolt to a cutter mounting seat installed at the rotating end of the cutter mount, the blade of the rotary blade is rearward of the set bolt in the direction of rotation by the main shaft. A cylinder type cutter for agricultural use, wherein a protrusion portion is formed in a portion located in the free space between the cutter mounts on the rear half side of the cutter mount, and the protrusion portion gradually projects toward the main shaft in a direction rearward in the rotational direction of the main shaft. This paper introduces a rotating blade.

[Example] Next, an example will be described in detail with reference to the drawings. Note that the same reference numerals in the drawings are used for structural members having the same effect.

Fig. 5 is a longitudinal side view of a cylinder type cutter A that can implement the present invention, where a is the machine frame, 1 is the cutting chamber,
10 is the supply port of the cutting chamber 1, 11 and 12 are the supply ports 1
13 is a supply gutter provided on the front side of the supply rolls 11 and 12, 14 is an outlet of the cutting chamber 1, and 15 is connected to the outlet 14. A discharge tube, 2 is a fixed blade arranged at the lower edge inside the supply port 10 and fixedly supported on the machine frame a, 4 is arranged so as to penetrate the center part of the cutting chamber 1 from side to side. 3 is a rotary blade attached to the main shaft 4 via a blade mount 5, and w is a blade edge 30b of the cutting edge portion 30 of the rotary blade 3. It shows the rotation trajectory.

Next, in FIG. 6, reference numerals 5 and 5 refer to a main shaft which is disposed so as to pass through the cutting chamber 1 of the cylinder type cutter A from side to side and is pivotally supported by the machine frame a, as shown in FIG. No. 4, a pair of blade mounting brackets are mounted on both ends in the cutting chamber 1 so as to face each other on the left and right, and each rotating end has a blade mounting seat 50,
50 is formed.

Reference numeral 3 denotes a rotary blade, the blade 3a of which is formed into a long plate shape in the left-right direction, which is the axial direction of the main shaft 4, and the blade mount 5 is attached to both left and right ends of the blade 3a. Bolt insertion holes 32, 32 for assembling with set bolts 51, 51 are formed in the blade mounting seats 50, 50 installed at the rotating ends of the blades 50, 5, respectively. The front edge (the right edge in FIG. 6) has an inclined blade surface 30a.
A cutting edge portion 30 having a blade edge 30b on the distal end side thereof is formed. This cutting edge portion 30 is the blade 3
In some cases, the blade 3a is formed from a hard steel material separately from the blade 3a, and is welded to the blade 3a, which is formed from a soft steel material that can be formed, like a cutting tool, as shown by the chain line in Fig. 6. .

31 is a set bolt 5 of the blade 3a of the rotary blade 3
1, 51 in the direction of rotation by the main shaft 4, and is a protrusion formed on the rear half side of the blade 3a, and is formed on the knife mounts 5, 5 on the rear half side of the blade 3a. The rotation locus of the blade edge 30b gradually moves toward the rear in the rotational direction of the main shaft 4 through the intermediate portion located in the free space between the blade mount 5 and the blade mount 5, excluding both ends that contact the blade 50. The slanted wall 3b is formed so as to be inclined toward the main shaft 4 side, which is the axis of the w, and the protrusion 31 is formed on the inner surface side (main shaft 4 side) of the slanted wall 3b so that it approaches the main shaft 4 side as it goes rearward. is forming.

FIG. 7 shows another embodiment of the rotary blade 3. In this example, while the rotary blade 3 shown in FIG. 6 is formed as a straight blade that is assembled with the blade 3a parallel to the main shaft 4, when the blade 3a is viewed from above, the main shaft 4
The blade is formed into a twisted blade so that it can be attached obliquely to the blade, and is the same as the embodiment shown in FIG. 6 except that the blade 3a is a twisted blade.

[Effect of the invention] The rotary blade 3 in the agricultural cylinder type cutter according to the invention configured as described above is capable of cutting the material y to be cut.
When cutting, the protrusion 31 formed on the rear half side of the blade 3a receives a reaction force from the material y to be cut, which causes the blade 3a to move the cutting edge 30 side around the set bolt 51. This causes a tendency for the mounting bracket 5 to rotate in the direction of pressing against the blade mounting seat 50, so that when the blade edge portion 30 cuts into the material y to be cut, the sloped blade surface 30a of the blade portion 30 is covered. By cutting into the material to be cut, the cutting edge portion 30 of the rotary blade 3 rises from the blade mounting seat 50 of the blade mounting bracket 5 to offset the reaction force received from the material to be cut y, and this slope Due to the reaction force received when the blade surface 30a cuts into the material y to be cut, the blade tip 30 of the rotary blade 3
The rotation locus of the rotating blade becomes larger in diameter, and is prevented from being pushed out toward the fixed blade 2, thereby effectively preventing the cutting edge portion 30 of the rotary blade 3 and the fixed blade 2 from being bitten.

[Brief explanation of the drawing]

Fig. 1 is a vertical sectional side view of a conventional cylinder type cutter, Fig. 2 is a perspective view of the rotary blade of the same as above, Fig. 3 is an explanatory view of the action of the above, Fig. 4 is an explanatory view of the rotary blade according to the present invention, FIG. 5 is a longitudinal sectional side view of a cylindrical cutter embodying the present invention, FIG. 6 is a perspective view of the same rotary blade, and FIG. 7 is a perspective view of another embodiment. Explanation of drawing symbols, A...Cylinder type cutter,
a... Machine frame, 1... Cutting chamber, 10... Supply port, 1
1, 12... Supply roll, 13... Supply gutter, 14
...Discharge port, 2...Fixed blade, 20...Blade tip, 3...
...Rotary blade, 3a...Blade, 3b...Slope wall, 30
...Blade tip, 30a...Slanted blade surface, 30b...Blade edge, 31...Protrusion, 32...Bolt insertion hole, 4
...Main shaft, 5...Cutter mounting bracket, 50...Cutter mounting seat, 51...Set bolt, w, w'...Rotation locus, y...Material to be cut.

Claims (1)

[Scope of utility model registration request] The longitudinal direction of the blade 3a is aligned in the axial direction of the main shaft 4 with a blade mount 5 installed at a part of the main shaft 4 that passes through the center of the cutting chamber 1 from side to side, located inside the cutting chamber 1. , a knife mounting seat 50,5 in which both ends of the blade 3a are mounted on the rotating end of the knife mount 5.
0, in a rotary blade of an agricultural cylinder type cutter that is assembled by set bolts 51, 51, the set bolts 51, 5 of the blade 3a of the rotary blade 3 are assembled.
1, the main shaft 4 is placed in a portion located in the free space between the blade mounts 5, 5 on the rear half side of the main shaft 4 in the direction of rotation of the main shaft 4. A rotary blade in an agricultural cylinder type cutter formed with a protrusion 31 that protrudes to the side.