JP3179767U - Mowing blade for mower - Google Patents

Abstract

There is provided a cutting blade for a mower having both excellent sharpness and durability.
A plurality of protrusions 3 are formed in a sawtooth shape protruding outward at a predetermined interval along the outer peripheral edge of a disk-shaped substrate 2. The tip 4 excellent in wear resistance and impact resistance has a pointed tip portion 4a and is attached to the tip side of the side edge 3b facing the rotation direction of each projection portion 3, respectively. The protruding edges 3 and the tips 4 have sharp edges on the side edges 3b and 4b facing in the rotational direction.
[Selection] Figure 1

Description

  The present invention relates to a cutting blade for a mower.

  2. Description of the Related Art Conventionally, as a cutting blade for a mowing machine that rotates in a disk shape and cuts grass, a blade having a sawtooth blade portion along the outer peripheral edge of a disk-shaped substrate (see, for example, Patent Document 1), a disk A chip saw (see, for example, Patent Document 2) in which chips are respectively attached to tips of a plurality of protruding portions protruding outward at predetermined intervals along the outer peripheral edge of the substrate is generally used. Yes.

JP 2000-139159 A Utility Model Registration No. 3053659

  However, those having a serrated blade portion as described in Patent Document 1 have an excellent sharpness, but when hitting a hard object such as a stone when mowing, the blade portion is chipped and the sharpness drops immediately. There was a problem that it could not be used. Further, the tip saw as described in Patent Document 2 is difficult to chip even when it hits a stone and has durability, but there is a problem that the sharpness is inferior compared to a saw-tooth shape having no blade portion. .

  The present invention has been made paying attention to such a problem, and an object thereof is to provide a cutting blade for a mower having both excellent sharpness and durability.

  In order to achieve the above object, a mowing blade for a mower according to the present invention has a disk shape and is a mowing blade for a mowing machine that is attached to the mower and rotated to mow the grass. A plurality of protrusions that are provided at predetermined intervals along the outer peripheral edge of the substrate and protrude outwardly, and chips that are respectively attached to the front end sides of the side edges facing the rotation direction of the protrusions. And having a cutting edge on a side edge of each protrusion and each chip facing in the rotation direction.

  The cutting blade for the mower according to the present invention has a tip attached to the tip side of the side edge facing the rotation direction of each protrusion, so it is hard to chip even when hitting a hard object such as a stone during mowing and the sharpness is reduced Without having excellent durability. Moreover, since it has a blade edge in the side edge which faced the rotation direction of each protrusion part and each chip | tip, it has the outstanding sharpness. For example, vines that were difficult to cut with a conventional tip saw can be easily cut. Thus, the cutting blade for a mower according to the present invention has excellent sharpness and durability. Each tip is preferably made of a material excellent in wear resistance and impact resistance.

  ADVANTAGE OF THE INVENTION According to this invention, the cutting blade for mowing machines which had the outstanding sharpness and durability can be provided.

It is (a) top view which shows the cutting blade for mowers of embodiment of this invention, (b) It is an enlarged plan view of a protrusion part.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.
FIG. 1 shows a cutting blade for a mower according to an embodiment of the present invention.
As shown in FIG. 1, a cutting blade 1 for a mower has a disk shape and is configured to be attached to a mower and rotated to mow the grass, and includes a substrate 2, a plurality of protrusions 3, and a plurality of Chip 4.

  The substrate 2 is made of high-strength carbon steel and has a thin disk shape. The board | substrate 2 has the fixing hole 2a for fixing to a mower at the center.

  The plurality of protrusions 3 are provided at predetermined intervals along the outer peripheral edge of the disk-shaped substrate 2. Each protrusion 3 is formed in a sawtooth shape and protrudes toward the outside of the substrate 2. Each protrusion 3 has a triangular shape with a smooth curved outer edge. Each projecting portion 3 has a top portion 3a formed closer to the rotational direction, and the side edge 3b facing the rotational direction is inclined with respect to the side edge of the substrate 2 at an angle close to vertical, and the opposite side edge 3c is It is formed so as to be inclined at a gentle angle. Each protrusion 3 is inclined such that the side edge 3c opposite to the rotation direction gradually becomes a steep angle from a slightly loose angle toward the adjacent protrusion 3 from the top 3a.

  The plurality of chips 4 are made of cast iron having excellent wear resistance and impact resistance, and are formed to be elongated with substantially the same thickness as the substrate 2. Each chip 4 has a pointed tip portion 4 a and is fixed to the top portion 3 a of each protrusion 3. Each chip 4 is attached such that the tip end portion 4a is exposed at the tip end side of the side edge 3b facing the rotation direction of each projection portion 3.

  As shown in FIG.1 (b), the cutting blade 1 for mowers has a blade edge | tip in the side edges 3b and 4b which faced the rotation direction of each protrusion part 3 and each chip | tip 4. As shown in FIG. Each blade edge is formed into a sharp blade shape by obliquely grinding one surface side of the side edges 3b, 4b.

  In the specific example shown in FIG. 1, the substrate 2 has a diameter of 23 cm. Forty protrusions 3 are provided, and the protrusion from the side edge of the substrate 2 to the top 2a is about 1.3 cm. Moreover, as for the protrusion part 3, the depth of the hollow between the adjacent top parts 2a is about 9 mm.

Next, the operation will be described.
Since the cutting blade 1 for a mower is attached with a tip 4 having excellent wear resistance and impact resistance so as to be exposed at the distal end side of the side edge 3b facing the rotation direction of each projecting portion 3, Sometimes it is hard to chip even when hitting a hard object such as stone, sharpness does not deteriorate, and it has excellent durability. Moreover, since it has a sharp blade edge | tip in the side edges 3b and 4b which faced the rotation direction of each protrusion part 3 and each chip | tip 4, it has the outstanding sharpness. For example, vines that were difficult to cut with a conventional tip saw can be easily cut. Thus, the cutting blade 1 for a mower has both excellent sharpness and durability.

DESCRIPTION OF SYMBOLS 1 Mowing blade for mowers 2 Substrate 2a Fixing hole 3 Protruding part 3a Top part 3b Side edge 3c facing the rotation direction 3c Side edge opposite to the rotation direction 4 Tip 4a Tip part 4b Side edge facing the rotation direction

Claims (1)

A cutting blade for a mower that has a disk shape and is attached to a mower to rotate and mow the grass,
A plurality of protrusions provided at predetermined intervals along the outer peripheral edge of the disk-shaped substrate and protruding outward;
Each having a tip attached to the tip side of the side edge facing the rotational direction of each protrusion,
A cutting blade for a mower having a cutting edge on a side edge of each protrusion and each chip facing in the rotation direction.

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