JP2000342063A - Rotary cutting unit of plant cutting machine and cutter member used for the unit - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide the subject unit which can change an angle for attaching cutting members to selectively use plural blade sides, cut plants also from the vertical direction, and also cut firm various trees. SOLUTION: Blade sides divided into plural sections are formed on the outer peripheral edge of each cutter member in the rotary cutting unit of a plant cutting machine, and an angle for attaching the cutter member to a rotor can be changed to direct one or more arbitrary blade sides in a cutting direction. The cutter member is attached so as to give a cutting blade side that an arbitrary blade side is approximately radially disposed on the rotation axis of the rotor, and angular portions are formed at the sections of the blade sides, respectively. The cutting blade sides of the cutter member are attached in a downward tilted state toward the rotation travel of the cutting unit.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a rotary cutting unit of a tree cutting machine in which a cutter is attached to a rotor rotated by a driving source such as a motor, and a cutter member used for the cutting unit.

[0002]

A conventional mowing device in which a disk-shaped rotary cutter having a saw blade on the outer periphery is mounted on a rotating shaft,
Since there is no blade between the rotary shaft and the outer periphery of the rotary cutter, only side mowing can be performed. For this reason, it was impossible to finely shear long grass from above while lowering the mower attached to the arm such as a power shovel from above. In addition, this kind of disc-shaped saw blade tends to chip, and a spare must be prepared in order to replace the blade during operation.

The inventor of the present invention has previously developed a mowing device in which a plurality of cutter members are radially mounted on a rotor fixed to a rotating shaft. If the blade edge is spilled, the cutter member must be replaced in its entirety, and if no spare is prepared, the operation must be stopped.

Further, the cutter member of the conventional mowing apparatus can cut only relatively soft grass because the blade has no cutting point, and cannot cut off the grown trees and the like.

Accordingly, a first object of the present invention is to provide a rotary cutting unit in which one cutter member can be used as a plurality of cutter members only by changing the mounting phase angle of the cutter member.

A second object of the present invention is to provide the above-mentioned cutting unit which can cut the vegetation vertically from above.

[0007] A third object of the present invention is to provide a cutting unit capable of cutting not only grass but also hard miscellaneous trees.

A fourth object of the present invention is to provide the above-mentioned cutting unit which can cut the grass while standing upright by wind pressure.

A fifth object of the present invention is to provide a cutter member used for the above-mentioned logging unit.

[0010]

In order to achieve the first object, according to the present invention, a cutter member is mounted on a rotor which is rotated by a driving source, and a cutting edge of the cutter member which rotates integrally with the rotor is used for planting. In the rotary cutting unit of a grass cutting machine that cuts trees, the outer peripheral edge of the cutter member is formed in multiple sections of cutting edges facing in different directions, and the phase angle of attachment to the rotor is changed to select an arbitrary cutting edge in the cutting direction. It is characterized in that it is made to be displaced.

In order to achieve the second object, the present invention provides a tree cutting machine which mounts a cutter member on a rotor which is rotated by a drive source, and cuts trees with a cutting edge of the cutter member which rotates integrally with the rotor. In the rotary cutting unit of the above, the outer peripheral edge of the cutter member is formed in a plurality of sections of the cutting edge facing in different directions, so that any one cutting edge is a cutting edge arranged substantially radially with respect to the rotor rotation axis. It is characterized in that another cutting edge is selectively displaced to the position of the radial cutting edge by changing the mounting phase angle to the rotor while mounting.

In order to achieve the third object, the present invention provides the above rotary cutting unit, wherein each cutting edge formed on the outer peripheral edge of the cutter member is formed into a corner, preferably a pointed cutting edge. It is further characterized by the following.

[0013] In order to achieve the fourth object, the present invention provides the rotary cutting unit, wherein the cutter member is fixed to the rotor in a state where the cutting blade side is inclined downward in the traveling direction of the cutting unit. It is characterized by having.

In order to achieve the fifth object, the cutter member according to the present invention is characterized in that an outer peripheral edge is formed on a plurality of sections of cutting edges directed in different directions, and the mounting phase angle is changed.
It is characterized in that any cutting edge can be selectively replaced as a cutting edge directed in the cutting direction.

In the above cutter member, preferably, the plurality of sections of the cutting edge directed in different directions of the outer peripheral edge are formed into at least two sides of the same shape which are sectioned at an equal rotation angle with respect to the axis. I do.

In the above-mentioned cutter member, furthermore, the partitioning portion of each cutting edge formed on the outer peripheral edge is formed at a corner, preferably a pointed cutting edge, and each cutting edge of the outer peripheral edge is divided via the pointed cutting edge. Is preferred.

[0017]

Embodiments of the present invention will be described below with reference to the accompanying drawings. FIG. 1 shows an example of a tree cutting machine using the rotary cutting unit of the present invention. The tree cutting machine 1 has a motor rotating shaft 3 driven to rotate by a hydraulic motor 2, and is directly driven by the rotating shaft 3. Alternatively, a plurality of (in the illustrated embodiment, a pair of right and left) rotary cutting units 4 that are driven to rotate indirectly are provided. In the illustrated embodiment, a hollow base member 5 is connected to the outside of the rotating shaft 3, and the rotating shafts 6 of the pair of right and left rotary cutting units 4, 4 are supported on the base member 5 in parallel with the motor rotating shaft 3. With
The rotation shaft 3 of the motor and the rotation shaft 6 of the logging unit 4 are linked by a rotation transmission means 7 such as a belt, so that the logging unit 4 rotates and cuts vegetation.

The base member 5 of the illustrated embodiment is rotatably connected via a brake mechanism (not shown), whereby the rotary cutting unit 4 is driven by the motor rotating shaft 3 via the belt 7. It is assembled so that it rotates and revolves with respect to the motor rotation shaft 3 when the rotation resistance becomes larger than the brake resistance of the base member 5.

The above-mentioned cutting mechanism is supported by a stay 10 having connecting pin holes 8 and 9 for arms and links of a power shovel or the like, and is moved by the power shovel. In addition, a casing 10 ′ surrounding the base member 5 and the rotary cutting unit 14 may be integrally provided below the stay 10, and the casing 10 ′ may be provided with an outlet 11 for sending out the cut vegetation fragments to the outside. Good.

The above is an example of the use of the rotary logging unit 4 according to the present invention, and is not limited thereto. For example, the rotary shaft 6 of the single logging unit 4 is connected to the motor rotary shaft 3. Use is of course also possible.

As shown in FIGS. 1 and 2, the rotary logging unit 4 of the present invention used in this manner has a rotary shaft 6.
A rotor 12 is integrally connected to a lower portion of the rotor 12, and a cutter member 14 is detachably attached to the rotor 12. The rotor 12 of the illustrated embodiment has four arms 13 radially extending at equal angles (equal intervals) from the rotating shaft 6, and a cutter member 14 is attached to the tip side of each arm 13 in the same posture. I have. The number of the arms 13 and the cutter members 14 of the rotor 12 is not limited to the illustrated embodiment, and can be arbitrarily designed to be one or more.

The cutter member 14 of the rotary logging unit 4 includes:
A plurality of blade edges 1 oriented in different directions on the outer peripheral edge
5 (the cutting edges 15a, 15b, 15c in the embodiment of FIG. 2). The cutter member 14 is provided with an arbitrary blade edge 15a.
Is strongly tightened to the arm 13 of the rotor 12 with, for example, a central main bolt 16, and is fixed to the arm 13 around a fixing position of the main bolt 16 with a plurality of detent knock pins 17. In addition, by changing the mounting angle with respect to the rotor 12, another blade edge 15b or 1
5c is configured to be displaced so as to face the cutting direction and to be replaced. Therefore, even if the cutting edge is chipped or worn, the work can be continued by changing the mounting angle and using another cutting edge.

The cutter member 14 shown in FIG. 2 has an outer shape formed by a three-sided blade having a substantially equilateral triangle, but is not limited to this. A circular (FIG. 3), a two-sided blade (FIG. 4), and a four-sided blade (FIG. 5) It can be configured in any other shape. Preferably, FIGS. 3 to 5
As described above, at least two cutting edges are formed so as to have the same shape cutting edge divided at an equal rotation angle with respect to the axis. In this way, it is possible to cut under the same conditions (such as the direction, length, and angle of the blade) even after replacing the blade edge to be used, and there is no effect on the balance of the rotor 12.

Each cutter member 1 of the rotary logging unit 4
4, preferably, as shown in FIG.
And the cutting edges are arranged along the radial direction of the rotation trajectory of the rotary cutting unit 4. By arranging in this way, it is possible to cut finely in sequence from directly above the vegetation, and when the vegetation is cut out from the outlet 11 of the casing 10 ', post-processing of the vegetation is performed. Is also very convenient.

Further, the cutter member 1 whose outer shape is other than a perfect circle
4 is preferably formed at a corner 18 at the section end of each cutting edge 15, preferably at a corner having a pointed tip. When a corner 18 is formed at the edge of the cutting edge of the cutter member 14 and the corner 18 is attached to the outer end of the rotation track of the rotary logging unit 4 as shown in FIG. At the outer cutting edge, the angled or pointed cutting edge rotates one after another at high speed, functioning as if it were a saw blade. Moreover, since the individual cutter members 14 form independent blocks and are configured as heavy and strong members,
The cutter member 14 can easily cut the miscellaneous trees at the outer corners 18 in addition to the cutting at the central portion.

As shown in FIGS. 1 and 2, the mounting posture of the cutter member 14 on the rotor 12 is such that the cutting edge (cutting edge) selected for cutting is directed downward in the direction of rotation of the rotary cutting unit 4. It is desirable to mount in an inclined state. By arranging in this way, the rotating logging unit 4 that is rotating
A rising air current is generated around the area by the action of the rotating blades, and this air current causes the grass to rise upward. This creates a grass upright phenomenon suitable for logging.

Each of the blade sides 15 of the cutter member 14 may have a series of continuous blades as shown in FIGS. 2 to 5, or may be formed as intermittent blades with irregularities as shown in FIG.

[0028]

According to the present invention, the cutter member has a blade edge divided into a plurality of sections, and the blade edge to be used can be changed by changing the mounting angle. In addition to being able to be used, even if the blade is broken, the work can be continued without using a spare, and the economic efficiency and work efficiency are significantly improved.

By arranging the cutting edges in the radial direction of the rotation axis, it is possible not only to cut sideways but also to cut trees from above. In the latter case, by surrounding the logging unit with a casing, the harvested material can be sucked and collected from the casing outlet, which makes it possible to automate the work after harvesting, which reduces the overall work efficiency. improves.

By forming a corner at the edge of the cutting edge and passing the corner through the outer end of the logging track, hard mixed trees can be easily cut.

Further, by mounting the cutter member in a downwardly inclined shape in the rotating direction to generate an upward airflow, the grass is erected, the cutting is facilitated, and the cut grass is blown upward and clings to the edge of the blade. Work efficiency is improved. .

[Brief description of the drawings]

FIG. 1 is a schematic configuration diagram of a tree cutting machine equipped with a rotary cutting unit according to the present invention.

FIG. 2 is a bottom view of a rotary logging unit according to one embodiment of the present invention.

FIG. 3 shows a cutter member according to another embodiment of the present invention.

FIG. 4 shows a cutter member according to another embodiment of the present invention.

FIG. 5 is a cutter member according to another embodiment of the present invention.

FIG. 6 shows a cutter member according to another embodiment of the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 ... Tree felling machine 2 ... Hydraulic motor 3 ... Motor rotating shaft 4 ... Rotary logging unit 5 ... Base member 6 ... Rotating shaft 7 ... Rotation transmission means 8, 9 ... Connecting pin hole 10 ... Stay 10 '... Casing 11 ... Discharge port DESCRIPTION OF SYMBOLS 12 ... Rotor 13 ... Arm 14 ... Cutter member 15, 15a, 15b, 15c, 15d ... Blade side 16 ... Main bolt 17 ... Dowel pin 18 ... Corner

[Reference number] PAS99013

Claims (7)

[Claims] In a rotary cutting unit of a tree cutting machine, wherein a cutter member is attached to a rotor which is rotated by a driving source, and the cutting edge of the cutter member is rotated integrally with the rotor, an outer peripheral edge of the cutter member is cut. A rotary cutting unit formed on a plurality of sections of cutting edges facing in different directions, and by changing a mounting phase angle to a rotor to selectively displace an arbitrary cutting edge in a cutting direction. 2. A rotary cutting unit of a tree cutting machine, wherein a cutter member is attached to a rotor that is rotated by a drive source, and the cutting edge of the cutter member that rotates together with the rotor cuts plants. By forming the blade sides of a plurality of sections facing different directions and mounting such that any one blade side is a cutting blade side arranged substantially radially with respect to the rotor rotation axis, and by changing a mounting phase angle to the rotor,
A rotary cutting unit characterized in that another cutting edge is selectively displaced to a radial cutting edge position. 3. The rotary cutting unit according to claim 2, wherein a corner is formed in a section of each cutting edge formed on an outer peripheral edge of the cutter member. 4. The rotary logging system according to claim 1, wherein the cutter member is fixed to the rotor in a state where the cutting blade edge is inclined downward in the direction of rotation of the logging unit. unit 5. A cutter member attached to a rotor of a tree cutting machine, wherein an outer peripheral edge is formed in a plurality of sections of cutting edges facing in different directions, and an arbitrary cutting edge is cut by changing a mounting phase angle. A cutter member for a rotary cutting unit, which is formed so as to be selectively replaced as a cutting edge directed in a direction. 6. The blade edge of the plurality of sections directed in different directions on the outer peripheral edge has at least two blade edges having the same shape and divided at an equal rotation angle with respect to an axis. Cutter member according to 5 7. The method according to claim 5, further comprising forming a corner in a section of each cutting edge formed on the outer peripheral edge, wherein each cutting edge of the outer peripheral edge is divided via the corner. Or the cutter member according to 6.