JPH0438554B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to improvements in the cutting mechanism of a cylinder-type agricultural straw cutter for cutting straw culms, grass, etc.

[Prior Art] As shown in Fig. 1, a cylinder-type agricultural straw cutter A has a cutting chamber 2 formed in the shape of a drum in a machine frame 1, and is arranged in such a manner that its axis line runs along the left-right direction. A rotary shaft 3 is installed at the axial center of the cutting chamber 2.
is arranged so as to penetrate from side to side, and its left and right shaft ends are pivotally supported in the machine frame 1, and a cutter is attached to a part of this rotary shaft 3 located in the cutting chamber 2 that protrudes in the radial direction. A rotary blade 5 whose blade is formed into a flat plate is attached to a blade mount 40 formed on the protruding end of the blade 4, and the blade is placed in a position parallel to the axis of the rotary shaft 3. As a result, the rotation of the rotary shaft 3 causes the rotary blade 5 to rotate around the rotary shaft 3 with a cylindrical rotation locus. The rotary blade 5 is located at the entrance 20 of the cutting chamber 2.
A fixed blade 6 that rubs against the inlet 20 is fixedly mounted on the machine frame 1 so as to cross the position along the lower edge of the inlet 20 from side to side. A feed roll chamber 7 is installed in which the loading rolls 70 and 71 are mounted on an axis, and a supply gutter 8 for supplying materials to be cut is provided on the front side of the feed roll chamber 7, which is opened on the side opposite to the entrance 20 of the cutting chamber 2. The base end side of the discharge gutter 9 is connected to the discharge port 21 located at the top.

As a result, when the material to be cut fed into the supply gutter 8 is fed into the cutting chamber 2 while being sandwiched between the upper and lower pair of feed rolls 70 and 71, the material to be cut is fed into the cutting chamber 2, and the material is fed into the cutting chamber 2 at the lower edge of the inlet 20. Fixed blade 6 installed along
By the friction between the blade and the rotary blade 5 rotating around the rotating shaft 3, the cut piece is cut from the position on the blade edge of the fixed blade 6, and the cut piece is discharged from the discharge port 21 to the outside of the machine. ing.

As shown in FIG. 2, the cutting mechanism a in the cylinder-type agricultural straw cutter configured as described above has a cutting mechanism a that radiates from the rotating shaft 3 to both ends of the rotating shaft 3 in the cutting chamber 2. A pair of blade mounts 4, 4 protruding in the direction are respectively mounted and opposed to each other, and a blade mount seat 40, 40 is formed at the protruding end of the blade mounts 4, 4, respectively, and a rotating blade is formed between them. The blade 5 is arranged so as to cross over, and both ends thereof are brought into contact with the blade mounting seats 40, 40, respectively,
By fixing with the set bolts 41..., the rotary blade 5 is assembled with the blade 51 parallel to the rotary shaft 3, and the rotary blade 5 is rotated by the rotation of the rotary shaft 3 to open the entrance 20 of the cutting chamber 2. It rotates by rubbing against a fixed blade 6 fixedly installed on the machine frame 1, and is thereby pivotally supported in a pair opposite to the feed roll chamber 7 installed on the front side of the inlet 20. The workpiece to be cut, which is fed into the cutting chamber 2 by the feeding rolls 70 and 71, is sequentially cut by the rotary blade 5 and the fixed blade 6, but at this time, When the blade edge 50 of the rotary blade 5 rubs against the blade edge 60 of the fixed blade 6 over its entire width at once, the material to be cut fed by the feed rolls 70 and 71 can be In cases such as straw bundles, the rotary blade 5
A large load is applied to the rotary blade 5, causing it to stop rotating when it bites into the straw bundle. As shown in FIG. 2, one end of the rotary blade 5 advances in the direction of rotation (in the direction of the arrow in FIG. 2) and the other end lags behind, so that the blade edge 60 of the fixed blade 6 rubs against the blade edge 60 of the fixed blade 6 sequentially from the side. As shown in FIG.

By the way, like this, a pair of blade mounts 4, 4
The rotary blade 5 is assembled so as to cross diagonally between the blades.
If the blade 51 of the blade is flat and the blade edge 50 is formed into a straight blade, when it is hung diagonally between the blade mounting seats 40, 40 at the tips of the pair of blade mounts 4, 4, Intermediate portion Y in the longitudinal direction of the blade edge 50 of
(Fig. 7) is closer to the rotating shaft 3 than the rotation locus of the ends X and Z (Fig. 7) of the blade edge 50, and the distance from the axis of the rotating shaft 3 of this intermediate point Y is the end. Since the distance is shorter than the distance from the axis of the rotating shaft 3 of X and Z, and it becomes impossible to match the blade edge 60 of the fixed blade 6, as shown in FIG. 2, the blade edge 50 is The blade 51 is formed into an arc along an imaginary cylindrical surface whose outer diameter is the rotation locus of the end of the blade, and the central portion thereof is directed outward as shown in FIGS. 3 and 4. The blade is formed into a twisted blade that bulges out in an arc shape, so that when the rotary blade 5 is assembled between the blade mounts 4 and 4 and installed on the rotating shaft 3, each part of the blade edge 50 in the longitudinal direction are positioned on the same rotation locus in side view and rotate around the rotation axis 3.

For this reason, the cylinder-type cutting mechanism a requires not only the production of the rotary blade 5, which is formed by forging into a special shape, but also the polishing and polishing of the blade edge 50. This creates a problem that makes it difficult to adjust the blade alignment.

The present invention has been made to solve these problems, and in order to facilitate the manufacture of the rotary blade, the rotary blade is formed into a straight blade shape with a continuous straight edge. By mounting the blade obliquely to the rotating shaft so that one end of the blade advances in the direction of rotation and the other end lags behind, the blade gradually slides against the edge of the fixed blade from one end to the other. , and the blade edges of the fixed blades rub against each other without any gaps over the entire width, and are sandwiched between a pair of feed rolls to enter the cutting chamber 2.
It is an object of the present invention to provide a new means for cutting straw bundles etc. fed into the interior with a small rotational power.

[Means for Solving the Problems] In the present invention, as a means for achieving this object, in the above-mentioned cylinder-type agricultural straw cutter, a cutting chamber formed in a drum shape is provided in the machine frame. A rotary shaft is mounted on the machine frame so that the axis line is along the left-right direction, and a rotary shaft passing through the axial center portion of the cutting chamber in the left and right directions is mounted on the machine frame, and a portion of the rotary shaft is located inside the cutting chamber. A blade mount protruding in the radial direction is attached to the blade mount, a rotary blade is attached to the protruding end of the blade mount so that the blade is parallel to the rotation axis, and the rotary blade is installed at the entrance of the cutting chamber. A fixed blade that rubs against the cutting chamber is fixedly installed along the lower edge of the entrance of the cutting chamber, and a feed roll is mounted vertically in front of the entrance of the cutting chamber, and a supply gutter is installed on the front side of the feed roll. In the cylindrical agricultural straw cutter to be installed, a blade mount is attached to the rotating shaft by fitting a boss part thereto, and the blade mount is attached to the protruding end of the holder so that it faces left and right in the cutting chamber. A pair of blade mounting seats are installed so that one of the blade mounting seats moves forward in the direction of rotation around the rotation axis and the other lags behind. Both ends of a rotary blade formed in a straight line with the blade edge along a straight line are rotated with the blade edge approximately following an imaginary arc centered on the rotation axis when viewed from the axial direction of the rotation axis. The blade is brought into contact with the axis of the rotating shaft in a diagonal direction when viewed from a direction perpendicular to the axial direction of the shaft, and is assembled to the blade mounting seat with a set bolt,
At the entrance of the cutting chamber, a fixed blade whose blade is formed into a flat plate shape and whose blade edge follows a straight line is installed, and the blade is arranged in an imaginary circular arc whose center is the rotation axis when viewed in the axial direction of the rotation shaft. The axis of the rotating shaft of the blade edge of the aforementioned rotary blade when viewed from the direction perpendicular to the axial direction of the rotating shaft with the flank of the blade facing toward the front side of the inlet. This paper proposes a cutting mechanism in a cylinder-type agricultural straw cutter that is fixedly mounted on a machine frame so that the cutting mechanism is tilted in the opposite direction at an angle of inclination substantially equal to the angle of inclination relative to the cutter.

[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 perspective view of a cutting mechanism a in a cylinder-type agricultural straw cutter in which the present invention can be carried out. show.

As shown in FIG. 1, the rotating shaft 3 is formed into a drum shape and its axial center line is placed in the cutting chamber 2 mounted on the machine frame 1 in a posture in which its axial center line follows the left-right direction. The machine frame 1 is arranged so that it penetrates through the machine frame 1.
It is a rotating shaft supported by the blade mounting bracket 4.
A cutter mounting seat 4 is attached to the protruding end of the arm portion 4b that protrudes in the radial direction from the boss portion 4a fitted to the rotating shaft 3.
0 is formed and a rotary blade 5 is assembled thereto, and a pair of left and right rotary shafts 3 are provided on the rotary shaft 3, so that a pair of blade mount seats 40 are attached to the protruding ends of the blade mounts 4, 4. , 40 are located forward in the rotational direction of the rotating shaft 3 in the case of one (left) blade mounting seat 40, and in the case of the other blade mounting seat 40, they are located in the forward direction in the rotational direction of the rotating shaft 3, 40 in the direction of rotation of the rotating shaft 3.

The rotary blade 5 has a blade 51 in the shape of a flat plate, and a blade edge 50 thereof is formed into a linear blade that continues in a straight line. The rotary blade 5 is connected to the pair of blade mounts 4,
By assembling and fixing both ends to the blade mounting seats 40, 40 of No. 4, the blade 5
1 is approximately along a virtual arc centered on the rotation axis 3, and as shown expanded in FIG. 6, the blade edge 50
is inclined at an angle β with respect to the axial center line of the rotating shaft 3 in plan view, and the leading end X and the trailing end Z of the blade edge 50 in the rotational direction are aligned in the axial direction. The state is such that they are located on the same rotation locus W with a radius R when viewed from above. The angle β is set to half that of the conventional means.

The fixed blade 6 has a flat blade 61 and a straight blade whose blade edge 60 is continuous in a straight line. The fixed blade 6 has a blade 61 that is
As shown in FIGS. 5 and 6, the position is approximately along the virtual arc centered on the rotating shaft 3, and the flank 6a following the blade edge 60 faces toward the front side of the entrance 20 of the cutting chamber 2. The rotary blade 5 is positioned along the lower edge of the entrance 20 of the cutting chamber 2 in accordance with the rotation locus of the rotary blade 5, and is fixedly attached to the machine frame 1. As shown, the blade edge 60 is inclined at an angle α with respect to the axis of the rotary shaft 3, and both ends x and z of the blade edge 60 are similar to the blade edge 50 of the rotary blade 5 described above. It is fixed and assembled to the machine frame 1 with both ends X and Z facing the rotation locus W. Further, the angle α corresponds to the inclination angle β of the blade edge 50 of the rotary blade 5, and the angle α corresponds to the slope angle β of the blade edge 50 of the rotary blade 5.
The slope is in the opposite direction to the slope of . That is, among both ends of the blade edge 60, the end x on the side corresponding to the end X located forward in the rotation direction of the blade edge 50 of the rotary blade 5 occupies a position delayed in the rotation direction. , such that the opposite end z occupies a leading position in the direction of rotation.

[Function] The embodiment device configured as described above functions as follows.

When the rotary blade 5 is set at the tip of the blade mount 4, the blade edge 50 of the rotary blade 5 is located between the X point at one end and the other end, as shown in FIG. By connecting the Z point of
The intermediate point Y thereof comes to be inside the rotation locus W of the ends X and Z.

Further, as shown in FIG. 6, the blade edge 60 of the fixed blade 6 is located between the points x and z on the rotational trajectory W, which are at a distance equal to the distance between the points The points are connected by a straight line, and the intermediate point y of the straight line enters the rotation locus W by the same amount as the intermediate point Y of the blade edge 50 of the rotary blade 5, so that the rotary blade 5 When rotated by the drive of the rotating shaft 3, the blade edge 50 is a straight blade, but
Each part of it comes to rub against the edge 60 of the fixed blade 6 in just the right amount.

For this reason, the rotary blade 5 in the form of a flat straight blade provided on the rotary shaft 3 is arranged so that its blade edge 50 is along the lower edge of the entrance 20 of the cutting chamber 2 by the drive of the rotary shaft 3. The back side of the fixed blade 6 fixedly mounted on the machine frame 1 is rotated from one end of the blade edge 60 of the fixed blade 6 toward the other end in the longitudinal direction while sequentially rubbing against each other. Therefore, even if the material to be cut fed by the feed rolls 70 and 71 is a wet bundle of straw, the cutting process can be performed powerfully.

[Effects of the Invention] As explained above, the cutting mechanism a in the cylinder-type agricultural straw cutter according to the present invention has the machine frame 1
The cutting chamber 2 is attached to a rotary shaft 3 mounted on the machine frame 1 so as to pass through the axis of the cutting chamber 2 mounted on the machine frame 1 from side to side.
A pair of blade mounting seats 40, 40 on the left and right, one of which advances forward in the rotational direction of the rotating shaft 3 and the other lags behind, are mounted on the rotating shaft 3 via the boss portion 4a. 4, and a rotary blade 5 having a blade 51 formed in a flat plate shape and having a blade edge 50 along a straight line is mounted on a pair of blade mounting seats 40, 40 on the left and right sides.
in a direction in which the blade edge 50 is orthogonal to the axial direction of the rotary shaft 3, with both end portions of the blade 51 substantially following an imaginary arc centered on the rotary shaft 3 when viewed from the axial direction of the rotary shaft 3. The blade 61 is attached to the blade mounting seat 40, 40 with a set bolt, and is attached to the blade 61 at the entrance 20 of the cutting chamber 2. A fixed blade 6 formed into a flat plate shape and having a blade edge 60 along a straight line.
, with the blade 61 substantially following the virtual arc centered on the rotating shaft 3 when viewed in the axial direction of the rotating shaft 3, and with the flank 6a of the blade facing toward the front side of the inlet 20. A state in which the edge 60 is tilted in the opposite direction at an inclination angle α that is approximately equal to the inclination angle β of the blade edge 50 of the rotary blade 5 with respect to the axial center line of the rotary shaft 3 when viewed from a direction perpendicular to the axial direction of the rotary shaft 3. , machine frame 1
Since the rotary blade 5 is fixedly installed in the cutting chamber 2, the rotary blade 5, which is formed into a flat, straight blade, has both ends of its blade 51 located in the cutting chamber 2, which are attached to a pair of blade mounting seats 40 on the left and right. , 40 and are assembled with set bolts, the blade edge 50 is set in a state inclined at a predetermined inclination angle β with respect to the axial center line of the rotating shaft 3, and the cutting is performed by driving the rotating shaft 3. The back side of the blade 61 of the fixed blade 6 that is fixedly installed at the entrance 20 of the chamber 2 with an inclination angle α substantially equal to the inclination angle β in the opposite direction is attached to the back side of the blade 61 of the fixed blade 6. They sequentially pass and rotate from one end to the other in the longitudinal direction while rubbing against each other.

For this reason, when the material to be cut that is fed into the cutting chamber 2 from the entrance 20 of the cutting chamber 2 by the feed rolls 70 and 71 is a wet bundle of straw, the cutting resistance is extremely large. Also, the rotary blade 5
It is now possible to carry out the cutting process without causing a situation where the rotary blade 5 bites into the straw bundle and stops its rotation, and when the rotary blade 5 is worn out, it can be removed and removed for polishing. This can be significantly simplified.

[Brief explanation of drawings]

Figure 1 is a vertical side view of a conventional cylinder-type agricultural straw cutter, Figure 2 is a perspective view of the same cutting mechanism,
FIG. 3 is a side view of the rotary blade shown above, FIG. 4 is a plan view of the same, FIG. 5 is a perspective view of the cutting mechanism of the cylinder-type agricultural straw cutter according to the present invention, and FIG. FIG. 7 is an explanatory diagram of the installed state of the rotary blade and fixed blade of a conventional cylinder-type agricultural straw cutter. Explanation of drawing symbols, A...Cylinder type cutter,
a... Cutting mechanism, W... Rotation locus, X, Z, x,
z... End, Y, y... Intermediate point, α, β... Angle, 1... Machine frame, 2... Cutting chamber, 20... Entrance,
21...Discharge gutter, 22...Discharge port, 3...Rotating shaft, 4...Blade mounting bracket, 4a...Boss portion, 4b...
... Arm part, 40 ... Blade mounting seat, 41 ... Set bolt, 5 ... Rotating blade, 50 ... Blade edge, 51 ...
...Blade, 6...Fixed blade, 60...Blade edge, 7...Feed roll chamber, 70, 71...Feed roll.

Claims (1)

[Claims] 1. A drum-shaped cutting chamber 2 is mounted on the machine frame 1 with its axial center line paralleling the left-right direction, and a rotating shaft 3 passes through the axial center of the cutting chamber 2 in the left and right directions. is mounted on a machine frame 1, and a blade mount 4 protruding in the radial direction is attached to a portion of the rotating shaft 3 located in the cutting chamber 2, and a protruding end of the blade mount 4 is attached to the cutting chamber 2. , the rotary blade 5 is mounted so that the blade 51 is parallel to the rotation axis 3, and a fixed blade 6 that rubs against the rotary blade 5 is placed at the entrance 20 of the cutting chamber 2 at the lower edge of the entrance 20 of the cutting chamber 2. Fixed installation along the cutting room 2
In a cylinder-type agricultural straw cutter A in which feed rolls 70 and 71 are vertically opposed in front of an inlet 20 and a feed gutter is installed on the front side, the rotating shaft 3 has a boss portion on it. Assemble the blade mount 4 to be fitted with the blade 4a, and attach it to the protruding end.
A pair of blade mounting seats 40, 40 are arranged so as to face each other left and right in the cutting chamber 2, so that one of the blade mounting seats 40 moves forward in the direction of rotation around the rotating shaft 3 and the other one lags behind. The blade 51 is formed into a flat plate shape and the blade edge 50 is aligned in a straight line. When viewed from the axial direction, the blade edge 50 is inclined obliquely to the axial center line of the rotary shaft 3 when viewed from a direction perpendicular to the axial direction of the rotary shaft 3, with the blade edge 50 substantially following a virtual arc centered on the rotary shaft 3. The blade 61 is formed in a flat plate shape at the entrance 20 of the cutting chamber 2, and the blade 61 is formed into a flat plate shape at the entrance 20 of the cutting chamber 2.
0 along a straight line, its blade 61
is the rotating shaft 3 when viewed in the axial direction of the rotating shaft 3.
The blade edge 6 is positioned approximately along the central virtual arc and with the flank 6a of the blade facing toward the front side of the inlet 20.
0 is a state in which the blade edge 50 of the rotary blade 5 is tilted in the opposite direction at an inclination angle α that is approximately equal to the inclination angle β with respect to the axial center line of the rotary shaft 3 when viewed from a direction perpendicular to the axial direction of the rotary shaft 3, A cutting mechanism in a cylinder type agricultural straw cutter fixedly mounted on a machine frame 1.