JPH0664418U - Mowing blade for brush cutter - Google Patents

Abstract

(57) [Abstract] [Purpose] When a mowing blade is damaged, the cutting efficiency is suppressed as much as possible so that weeds can be cut without any problems, and the use period of one mowing blade is extended. The purpose is to improve economic efficiency. [Structure] A plurality of saw-shaped cutting blades 2 are provided at equal intervals on a circumferential end portion of a grass cutting blade body 1. An arc-shaped blade portion 3 is provided in a valley portion between the cutting blade 2 and a cutting blade 2 ′ provided adjacent to the cutting blade 2. This blade portion 3 is provided between all the cutting blades 2. The blade portion 3 is formed integrally and continuously with the blade portion 2a of the cutting blade 2. When the cutting blade 2 is damaged, the blade portion 3 acts as a new small-sized cutting blade and suppresses a reduction in cutting efficiency due to damage of the cutting blade 2.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a mowing blade of a brush cutter used when mowing weeds and the like.

[0002]

[Prior art]

 Conventionally, as shown in FIG. 3, a mowing blade for a brush cutter has a cutting blade 6 which is formed into a disk shape and is provided with a plurality of cutting blades 6 at a peripheral end thereof by rotating at high speed. Weeding weeds.

[0003]

[Problems to be solved by the device]

 As described above, the mowing blade is rotating at a high speed, but when the cutting blade of the mowing blade comes into contact with an obstacle such as a stone, the cutting blade frequently breaks. If this damage affects multiple cutting blades, there is a problem in that the cutting efficiency of the mowing blade is reduced. Traditionally, grass cutting blades for brush cutters have been treated as disposable consumables, and how to use a single grass cutting blade for a long time is a branch point of economic advantages. Pursuing this economic advantage presents the conflicting problem of having to use damaged blades and gradually diminishing the efficiency of weeding each time they are damaged. In view of the above-mentioned problems of the prior art, the present invention suppresses the reduction of cutting efficiency when the cutting blade is damaged as much as possible, so that weeds can be cut without any trouble, and The purpose is to extend the period of use of the mowing blade and improve economic efficiency.

[0004]

[Means for Solving the Problems]

 Therefore, in the present invention, in a grass cutting blade for a brush cutter, which is formed in a disk shape and has a plurality of cutting blades at its peripheral end portion, a blade portion is provided in a valley portion between the cutting blades.

[0005]

【Example】

 Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a plan view of a mowing blade for a brush cutter according to the present invention, and FIG. 2 is a main part plan view showing a damaged state of the mowing blade.

As shown in FIG. 1, the grass cutting blade body 1 is formed in a disc shape. A plurality of saw-like cutting blades 2 are provided at equal intervals on the circumferential end of the grass cutting blade body 1. A blade portion 3 formed in an arc shape is provided in a valley portion between the cutting blade 2 and a cutting blade 2'provided adjacent to the cutting blade 2. The blade portion 3 is provided between all the cutting blades 2 and is integrally formed with the blade portion 2a of the cutting blade 2 in a continuous manner.

The lawn mower blade for this brush cutter cuts weeds by rotating at high speed, and shows higher cutting efficiency than the conventional lawn mower blade even under normal use conditions. The most effective effect compared to the grass cutting blade for a brush cutter is when the cutting blade 2 is broken. When the conventional cutting blade 6 shown in FIG. 3 is damaged, the blade portion of the cutting blade 6 is missing, so that the cutting efficiency is significantly reduced. As shown in FIG. 2, when the cutting blade 2 of the grass cutting blade for the brush cutter is damaged, a valley portion between the cutting blade 2 and the cutting blade 2 ′ provided adjacent to the cutting blade 2 The blade portion 3 formed in an arc shape acts as a new small cutting blade, and suppresses a reduction in cutting efficiency due to damage of the cutting blade 2. This difference in cutting efficiency becomes larger as the number of broken points on the cutting blade 2 increases. In this way, the reduction in the cutting efficiency due to the breakage of the cutting blade 2 is smaller than the overall cutting efficiency, so that the use period of one grass cutting blade is extended and the economical efficiency is improved.

In the present embodiment, the blade portion 3 is formed in an arc shape, but it is not limited to this and may be, for example, one having a triangular vertex shape.

[0009]

[Effect of device]

 As described above, in the present invention, in a grass cutting blade for a brush cutter, which is formed in a disk shape and has a plurality of cutting blades at its peripheral end portion, the blade portion is provided in the valley between the cutting blades. When the grass cutting blade is damaged, the blade formed in the valley acts as a new small cutting blade, and the reduction in cutting efficiency due to damage to the cutting blade is kept to a minimum, and weeding is performed without hindrance. In addition to the excellent effect, it also has the excellent effect that the period of use of a single cutting blade can be extended, thereby increasing the economic efficiency.

[Brief description of drawings]

FIG. 1 is a plan view of a grass cutting blade for a brush cutter according to the present invention.

FIG. 2 is a plan view of an essential part showing a damaged state of a mowing blade.

FIG. 3 is a plan view of a main part of a conventional grass cutting blade for a brush cutter.

[Explanation of symbols]

 1 Cutting blade main body 2 Cutting blade 2'Cutting blade 3 Blade part

Claims (1)

[Scope of utility model registration request] 1. A grass cutter blade for a brush cutter, which is formed in a disk shape and has a plurality of cutting blades at its peripheral end portion, wherein the blade portion is provided in a valley portion between the cutting blades. Mowing blade.