JPH10150827A - Blade for bush cutter - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent grass from being wound to the attachment part of a blade at the time of a mowing operation in the blade used for a bush cutter. SOLUTION: In this blade 1 for the bush cutter constituted of a disk-like plate body 6 for which blade parts 4 are formed on an outer peripheral part, erected pieces 2 whose erected height is successively made higher as approaching a rear part side with the rotating direction of the plate body 6 as a reference are formed at positions on an inner side from the blade parts 4.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an improved blade used in a power-type mower.

[0002]

2. Description of the Related Art As shown in FIG. 1, a power-type mower generally used in the prior art has a rotary output of a power motor 8 and a flange 10 at a distal end thereof through a shaft disposed inside a cylindrical body 9. As shown in FIG. And the blade is attached
It is usually performed by screwing to the flange 10 with a fixing screw, and the blade used for this is mounted on the center of a disk-shaped plate having a large number of blades formed on the outer peripheral portion thereof. It is common to have a configuration in which a hole for attaching to a hole is formed.

[0003]

When a mowing operation is performed by using such a mower, the grass cut by the blade is usually blown outward by the rotation of the blade. When cutting becomes bad, or when cutting thin and weak grass, or hay, etc., some grass wraps around the blade attachment part, and the amount gradually increases, which becomes resistance and causes the blade to cut. The rotating force drops, and eventually the blade stops rotating and ends.

In such a situation, it is necessary to stop the mowing work and to remove the wound grass. However, if this happens frequently, the working efficiency will be significantly reduced. It is.

[0005] The present invention seeks to eliminate such disadvantages found in the conventional configuration.

[0006]

A blade for a mower according to the present invention has a blade portion formed on an outer peripheral portion of a disk-shaped plate member, and is provided with a rotating direction of the plate member at a position further penetrated from the blade portion. With reference to the above, by forming a rising piece whose rising height gradually increases toward the rear side, grass that is going to enter between the rotating part and the non-rotating part is jumped upward, and Thus, it is possible to prevent the grass from being wound during work.

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Referring to the drawings, an embodiment of the present invention will be described. As shown in FIG. 2, a blade body 1 for a brush cutter has an outer peripheral portion of a disk-shaped plate body 6 having a hole 5 in the center. To
A large number of blades 4... Formed by forming the saw-shaped cuts 3 are arranged, and a carbide tip 7 is fixed to the front corner with reference to the rotation direction A during use. Further, by pressing the plate body 6 at a position where the blade body 4 enters, the front is substantially equal to the upper surface of the plate body 6 with respect to the rotation direction A of the blade, and the rear side. The structure is such that the rising pieces 2 whose rising height gradually increases toward the side are formed.

In the above embodiment, the formation of the rising pieces 2
This is a case where the plate body 6 is formed by press working, but as another embodiment of the present invention, the rising height on one side is extremely small, and the rising height gradually increases toward the other side. A metal piece of a different shape is prepared separately, with the lower side located in the front side in the rotation direction and the higher side located in the rear side in the rotation direction based on the rotation direction at the time of use, and It is also possible to adopt a configuration in which the base is fixed in a plate shape by means such as spot welding.

In the above-described embodiment, a cemented carbide tip is implanted in the blade portion. In another embodiment, a plate body having four or eight blades, which is generally used conventionally, is formed. In addition, it is also possible to adopt a configuration in which a rising piece having the same configuration is formed.

[0010]

The blade body for a mower according to the present invention has the above-described structure, and can effectively prevent grass from being wound around a mounting portion of the blade during a mowing operation. There is an advantage that the resistance at the time of work can be reduced and mowing work can be performed efficiently.

In other words, the phenomenon of grass wrapping around the blade attachment portion during mowing is caused by the fact that a part of the cut grass remains on the blade body, and the tip side is kept in a state in which the base portion remains hooked on the attachment portion. As a result of being turned,
The blade for a mower according to the present invention has a configuration in which a front side is low with respect to the rotation direction A, and a high rising piece is formed toward a rear side, so that grass is formed on the blade body. Even if you try to ride it, it will be jumped up by the diagonal upper side of the rising edge formed on the upper surface of the blade plate, and the grass base will not have a chance to get entangled with the blade attachment part, resulting in the grass wrapping phenomenon There is an advantage of becoming.

Further, conventionally, there is a configuration in which a cutting blade is formed in a blade plate surface shape, and the grass to be wound is cut to prevent such a winding phenomenon. However, such a thing has a large resistance caused by the rising blade contacting the grass,
The work efficiency is reduced by lowering the rotation of the sharp blade, especially when the sharpness of the rising blade becomes poor, the resistance becomes extremely large, and it returns, increasing the winding phenomenon, In the blade for the brush cutter according to the present invention, since the tip of the rising piece is low and the rear side is high, there is almost no resistance during rotation and it is not intended to cut grass. Therefore, there is an advantage that the function is not degraded due to wear.

[Brief description of the drawings]

FIG. 1 is a perspective view showing an engagement state between a brush cutter and a blade.

FIG. 2 is a perspective view showing the entire blade of the mower according to the present invention.

[Description of sign]

 DESCRIPTION OF SYMBOLS 1 Blade body for mower 2 Rise piece 4 Blade part 6 Plate

Claims (1)

[Claims] 1. A blade for a mowing machine composed of a disk-shaped plate body 6 having a blade portion 4 formed on an outer peripheral portion, wherein the rotation direction A of the plate body 6 is set at a position where the blade portion 4 enters. As a criterion,
A blade for a brush cutter characterized by forming a rising piece 2 whose rising height gradually increases toward the rear side.