JP2018082686A - Grass-cutting blade capable of improving work efficiency and being free from entwining - Google Patents

Abstract

PROBLEM TO BE SOLVED: To facilitate passing of the next cutting blade by floating cut grasses to reduce double cutting and to prevent entwining by discharging cut grasses to the outside, and to reduce scattering of grasses to a face, in comparison with a conventional product.SOLUTION: In a cutting blade which is rotated at high speed, processing is simple, and equipment is simple and well-balanced. Namely, in a rotary grass-cutting blade, in the case of 8 blades, a flank of a cutting blade is faced upward, and inclined thinning 8 is applied to the inside of a part of an outer peripheral groove of a rotor. Further, warp-faced bodies 3, 4 for aiming at floating of grasses and discharging it to the outside are provided on an upper surface.SELECTED DRAWING: Figure 1

Description

In the present invention, the mowing blade of the mowing and the rotating body constituting the mowing blade lift the mowing grass and move it to the outside so that the moving force of the mowing blade is reduced, and further around the root. The present invention relates to a cutting blade that prevents vines and grass from winding.

In order to prevent the mowing machine from being wrapped around the base of the rotating body, a method of cutting and preventing the grass is mainly used. A cutting blade is separately provided on the upper surface of the rotating body to cut grass coming to the base of the rotating body. In addition, a small rotating body with a cutting blade on the outer periphery sold separately is mounted with the center of rotation aligned on the upper side. As another example, a cutting blade is separately attached to a portion of a support column of a handle that supports a rotating body with a bolt or the like.

Japanese Patent No. 4137758 Patent Gazette

Japanese Patent Application Laid-Open No. 2013-81444

Although the conventional invention can prevent the rotator from being wound around the root to some extent, it produces the following negative elements. 1—Since cutting is performed at least a second time with a blade for preventing wrapping, the resistance increases. 2- The cut grass is often cut with a blade at the back, which increases resistance. 3- The movement of a blade becomes heavy because the grass which mowed stays on the upper part of a rotary body. 4- The ability to prevent wrapping is not sufficient. 5—This type of work is costly and increases the risk of upper cutting edges during work.

FIG. 1 shows an example in which thinning (a mortar-shaped dent surface) is formed on the back side of the outer peripheral groove, and a warped surface is installed on the upper surface of the rotating body. The warped surface has a triangular structure when viewed from above, and the inner surface and the rear surface of the rotation are higher from the rotation surface in the view from the upper surface in the rotation direction. The grass cut by the cutting blade is lifted slightly at the thinning inclined surface and this portion, and moves so that it is discharged to the outside because the outside is lowered. When lifted, the next blade is less likely to hit the grass that has been cut once, the movement of the rotating body becomes lighter, and the operability increases. Physical load such as reduction of wrapping and improvement of operability is reduced, and work efficiency is improved. In FIG. 2, the blade of 8 blades faces upward, the cut grass is lifted once by the flank of the blade, and mortar-like thinning is applied to the groove portion to lift the cut grass and reduce the resistance. (If the rotator shown in FIGS. 1 and 2 has holes, it depends on the area of the holes, but air flows from the lower surface to the upper surface, and the effect of strengthening the airflow in the circumferential direction is likely to appear.)
By doing so, the effect of reducing the resistance of the mowing operation is greatly produced. Further, as shown in the figure, if a warped face for discharging grass is provided, a further effect of preventing winding is exhibited.

The movement of the mowed grass instantly floats to reduce the resistance to the cutting blade, and at the same time, the mowed grass moves to the center of rotation so that it does not collect.

Furthermore, the bottom part of the outer peripheral groove had no ingenuity that took into account the elements of cut grass escape. The cut grass stems directly hit this groove, creating resistance. A thinning relief surface similar to the mortar shape seen on the tip of a drill is created in this part, making it easy to move upwards of the grass and thus making the winding and rotating body lighter. did.

The mowed grass is lifted by the thinning part of the outer circumferential groove to lighten the movement of the blade. Further, the grass is lifted even on the inner warped surface, and the movement of the blade is lightened, and it acts to discharge to the outside. The grass that could not be discharged there is also prevented from wrapping by discharging the grass that enters inside to the outside with a curved surface near the center of rotation.
When the cut grass is lifted up, there is less overlap cutting and less resistance to blade movement, leading to a reduction in labor and improving work efficiency. The movement of the grass becomes the outer peripheral direction, so that the grass does not collect near the center of rotation, preventing wrapping and preventing the debris from flying near the face. Floating on the top is less labor than having grass on top, and the load on the machine's engine is less. In addition, the wrapping is reduced, and the overall work efficiency is greatly improved.

It is the figure applied to the chip saw in this invention. It is the figure applied to the cutting blade of 8 blades in this invention.

1. Float the cut grass and make it easier to pass the next cutting blade. 2. Reduce mowing twice. 3. Cut the grass to the outside to prevent wrapping.
Since the cutting blades rotate at high speed, to realize these three items, the processing is simple, the equipment is simple, and the balance is good. FIG. 1 is applied to a chip saw. FIG. 2 is applied to an 8-blade cutting blade.

1 and 2 show the thinning (8) portion. This alone can be expected to have an effect, but in order to further improve the ability to prevent wrapping, it is necessary to add a warped face inside. These things actually work and show good behavior when used. That is, the resistance of the mowing operation is reduced. The mowed grass floats on the upper surface, and the eight blades tend to discharge the grass to the outside on the slope of the flank of the blade surface and the upper surface of the thinning. Furthermore, it is possible to realize the low probability of wrapping due to increased scattering of grass in the outer peripheral direction due to the inner warped surface. It is especially useful for grass that has not been cut for several years, such as fallow fields.

In the countryside, we often use mowers that support the body, such as fallow fields, road surfaces, and vacant land. The mowing is determined to be a heavy labor and not a long time. The more the resistance of mowing to the left and right of mowing, the more fatigue and the lower the efficiency. The efficiency is improved by reducing this resistance. At the same time, we will reduce the amount of grass wrapping around the center and reduce grass scattering near the face.

  DESCRIPTION OF SYMBOLS 1 Mounting hole, 2 Space | interval with stopper, 3 Warp surface for lifting and cutting to the outer periphery of cut grass, 4 Warping surface for discharging to the outer periphery of cut grass (mainly for preventing wrapping), 5 Peripheral line of imagination of rotating body stopper, 6 Tip of chip saw 7, Distance to outer peripheral groove (5-13 mm is good), 8 Thinning part, 9 Proposed shape of other warped surface (reference), 10 8 Blade of blade (upward), 11 Rotating body

The movement of the mowed grass instantly floats to reduce the resistance to the cutting blade and prevent the grass from cluttering the rotating body. In addition, the effect of the mowing grass moving in the outer peripheral direction is exerted, and the mowing grass moves in a direction that does not collect at the center of rotation. The grass floating action depends on the "wedge action" due to the rotational force, and depends on the inclination angle of the warped surface, but it is generally lifted by a force of one tenth of the rotational force, and the resistance applied to the cutting blade is greater than the resistance of the conventional cutting blade. By being greatly reduced, it is possible to reduce fuel consumption by reducing resistance to rotational power and reduce labor for moving the rotary blade, thereby reducing human fatigue and saving energy as a whole. The effect of chamfering the corners of the upper surface of the portion connecting the cutting blades of the 8-blade in FIG. 2 with the outside is the same also for the rotary body of a 4-blade / 3-blade mowing. . In other words, it can be seen that the mowing grass can be lifted with a "wedge action" to reduce resistance, the depth and width can be increased with a single mowing stroke, and energy efficiency is improved compared to the conventional one. Can do. It is surprising that there was no such device until now.

Claims (2)

As shown in FIG. 1 and FIG. 2, in the rotary type mowing blade, the cutting blade with the flank face of the cutting blade facing upward and the thinning inclined on the inner side of the groove portion on the outer periphery of the rotating body. In a rotary type mowing blade, a mowing blade provided with a warped face as shown in FIGS. 1 and 2 for measuring the floating of the grass and the discharge to the outside.

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