JP2021093926A - Hammer knife type mower - Google Patents

Abstract

To provide an unprecedented cutting type hammer knife type mower.SOLUTION: A hammer knife type mower includes a hammer knife 3, a receiving blade 4, a cutting blade shaft 6 and a mowing unit body 2. The cutting blade shaft 6 is provided with a plurality of hammer knives 3, and the cutting blade shaft 6 is mounted on the mowing unit body 2, and the receiving blade 4 is attached at a position where a blade body 34 of the hammer knife 3 passes above, under the mowing unit body 2.SELECTED DRAWING: Figure 2

Description

The present invention relates to a hammer knife type mower.

There are various types of mowers, but the hammer knife type mower can crush the mowed grass finely, is highly suitable for tall grass, and can handle bamboo grass, etc., so it can be used for fallow fields and rivers. It is used in various places such as embankments, slopes of motorways, and mountainous areas. It is also used to crush tall sorghum when planting green manure plants such as sorghum in the field.
Regarding the cutting blade of the hammer knife type mower, various improvements have been conventionally made in order to improve the sharpness, for example, as in Patent Document 1.

Japanese Unexamined Patent Publication No. 2009-268444

Conventionally, grass is mowed by a hammer knife alone, but the problem to be solved by the present invention is to provide a hammer knife type grass mower of an unprecedented cutting type.

The present invention includes a hammer knife, a receiving blade, a cutting blade shaft, and a mowing unit main body, the cutting blade shaft is provided with a plurality of the hammer knives, and the cutting blade shaft is mounted on the mowing unit main body. It is a problem to make a hammer knife type mowing machine which is hung and is characterized in that the receiving blade is attached to the lower part of the mowing unit main body at a position where the blade body of the hammer knife passes above. Was solved.

Conventionally, in the hammer knife type mower, only the hammer knife is used as the cutting blade, but in the present invention, the sharpness can be improved by providing the receiving blade.

Overall perspective view of a hammer knife mower Explanatory view showing the mounting state of the hammer knife (A) Cross-sectional view of the cutting blade shaft (B) Enlarged perspective view of the hammer knife Explanatory drawing showing the relationship between the receiving blade and the hammer knife (A) Side sectional view of the mowing unit body (B) Perspective view of the receiving blade Another aspect of the hammer knife (A) Hammer knife with a curved blade (B) Hammer knife with a "heavy" blade

(Example)
FIG. 1 is an overall perspective view of the hammer knife type mower 1. Behind the hammer knife type mower 1 is a control unit 11 that can be operated by the passenger. Further, a mowing unit main body 2 is mounted in front of the hammer knife type mower 1.
In the embodiment, it is a passenger type, but it goes without saying that it may be a radio-controlled type or an autonomous traveling type. Further, although the mowing unit main body 2 is mounted in the front in the embodiment, it may be mounted in the rear, and the place where it is mounted is arbitrary.

FIG. 2 is an explanatory view showing an attached state of the hammer knife 3. FIG. 2A is a cross-sectional view of the cutting blade shaft 6, in which a large number of hammer knives 3 are attached to the driving and rotating cutting blade shaft 6 by a mounting tool 62 via a hammer knife mounting portion 61.
FIG. 2B is an enlarged perspective view of the hammer knife 3, which has a blade body 34 at one end of the hammer knife 3. The blade body 34 is provided with a front blade 341 and a rear blade 342, and when the front blade 341 is worn, the hammer knife 3 may be inverted and attached, and the undamaged rear blade 342 may be brought forward. it can.
As will be described in detail later, since the hammer knife 3 is a double-edged blade having a front blade 341 and a rear blade 342, a down cut in which the hammer knife 3 rotates from top to bottom with respect to the forward direction and a forward direction. It is also possible to select an upper cut in which the hammer knife 3 rotates from the bottom to the top depending on the situation.
A support plate 32 is erected in the center of the blade body 34 of the hammer knife 3, and a mounting hole 31 is provided at the end thereof. The hammer knife 3 is attached to the hammer knife attachment portion 61 provided on the cutting blade shaft 6 by the attachment tool 62 by using the attachment hole 31.

FIG. 3 is an explanatory diagram showing the relationship between the receiving blade 4 and the hammer knife 3. FIG. 3A is a side sectional view of the grass cutting unit main body 2, and the cutting blade shaft 6 is installed at the center. The cutting blade shaft 6 is provided with a large number of hammer knife mounting portions 61, and the mounting holes 31 of the hammer knife 3 and the holes (not shown) in the hammer knife mounting portion 61 are aligned with each other, and the mounting tools are provided. 62 is inserted and a hammer knife 3 is attached.

On the other hand, the receiving blade 4 is attached to the lower part of the mowing unit main body 2 by the receiving blade fixing tool 47 via the receiving blade mounting bracket 41 at a position where the blade body 34 of the hammer knife 3 passes above.
Since the receiving blade 4 is provided, the vegetation is sandwiched between the hammer knife 3 and the first blade 45 of the receiving blade 4, and is cut so as to be cut with scissors, so that the cutting is clean.
Further, when the mowed grass is discharged, the mowed grass is pushed out to the upper surface of the receiving blade 4, so that the receiving blade 4 also serves as a guide for mowing grass discharge, and the discharging performance is improved.

FIG. 3B is a perspective view of the receiving blade 4, and the receiving blade 4 is composed of a side view “dogleg” plate body bent at the center. A first blade 45 is provided at the front end of the receiving blade 4, and a second blade 46 is provided at the rear end of the receiving blade 4. In the embodiment, the receiving blade 4 can be removed from the mowing unit main body 2 and the second blade 46 can be inverted and replaced at the position where the first blade 45 was. As a result, when the first blade 45 is worn, the receiving blade 4 can be inverted and replaced, and replaced with a second blade 46 that is not worn.

In the embodiment, the receiving blade 4 is a double-edged blade provided with the first blade 45 and the second blade 46, but it may be a single-edged blade or blades may be provided on all sides of the blade body 34. Further, in the embodiment, the blade has a straight shape, but a blade having an uneven shape may be used. As long as the blade body 34 of the hammer knife 3 can be provided at a position where it passes above the receiving blade 4, the shapes of the first blade 45 and the second blade 46 of the receiving blade 4 can be any shape. it can.
Further, in the embodiment, the blade body 34 of the hammer knife 3 is a plate-shaped blade, but any shape may be used as long as it can pass above the receiving blade 4, for example, a ginkgo blade. It may be. FIG. 4 is another aspect of the hammer knife 3, and FIG. 4 (A) is a hammer knife having a curved bottom surface. In this way, the blade body 34 attached to the support plate 32 may be curved so as to match the movement locus of the hammer knife 4 that moves in a circle about the cutting blade shaft 6. Further, as shown in FIG. 4B, it may be a hammer knife in which a blade 34 having a “H” shape is attached to the support plate 32 at the end.

(Downcut / Uppercut)
In the embodiment, since the blade body 34 of the hammer knife 3 is double-edged, both downcut and uppercut can be performed. Both cuts can be handled by simply changing the rotation direction of the cutting blade shaft 6 without changing the direction of the blade.
Generally, it is said that the uppercut in which the hammer knife 3 rotates from the bottom to the top in the forward direction cuts the cutting stock more cleanly. However, in front of the mowing unit 2, an intake port for taking in grass is wide open, and the cutting blade rotates from the bottom to the top in the forward direction, so that stones and the like hit the hammer knife 3 and scatter from the intake port. Sometimes.
On the other hand, in the down cut in which the hammer knife 3 rotates from top to bottom in the forward direction, stones and the like fly in the direction opposite to the wide open intake port, so that the stepping stone prevention property is improved, but the cutting performance is improved. It is inferior, and in some cases, uncut parts may occur.

In the embodiment, the receiving blade 4 is provided corresponding to the downcut to compensate for the cutting performance which is a drawback of the downcut. Needless to say, the mowing unit 2 may be further provided with a receiving blade 4 corresponding to the upper cut. In this case, since the receiving blade 4 is provided on the forward direction side, it can be expected that a part of the stepping stones hits the receiving blade 4 to suppress the scattering of the stepping stones. As shown in FIG. 3B, the receiving blade 4 bent in a “dogleg” shape may be used, and the scattering of flying stones can be further suppressed.
Further, in both the down cut and the upper cut, the receiving blade 4 acts as a guide for the cut grass, so that the discharge efficiency can be expected to be improved.

Although the examples according to the present invention have been described in detail with reference to the drawings, the specific configuration is not limited to these examples, and the design changes within a range not deviating from the gist of the present invention. Etc. are included in the present invention.

Further, in the above-described embodiment, various possible modes of the hammer knife 3, the receiving blade 4, and the like have been described, but unless there is a particular contradiction or problem in the purpose and configuration of the hammer knife 3, the mutual modes can be combined. is there.

1 Hammer knife type mowing machine 11 Control unit 2 Mowing unit body 3 Hammer knife 31 Mounting hole 32 Support plate 34 Blade 341 Front blade 342 Rear blade 4 Receiving blade 41 Receiving blade mounting bracket 45 First blade 46 Second blade 47 Blade Fixing Tool 6 Cutting Blade Shaft 61 Hammer Knife Mounting Part 62 Mounting Tool

Claims (2)

Equipped with a hammer knife, receiving blade, cutting blade shaft and mowing unit body,
A plurality of the hammer knives are provided on the cutting blade shaft.
The cutting blade shaft is mounted on the mowing unit main body.
A hammer knife type mower characterized in that a receiving blade is attached to a lower portion of the mowing unit main body at a position where the blade body of the hammer knife passes above.
The receiving blade is provided with a first blade at the front end facing the hammer knife and a second blade at the rear end, and the receiving blade is removed from the mowing unit main body to provide a second blade. The hammer knife type mower according to claim 1, wherein the blade of No. 1 can be inverted and replaced at the position where the first blade was.

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