JP3161389U - Crushing claw with protrusions for tillers - Google Patents

Abstract

The present invention provides a crushing claw with projections for a tiller that can improve the workability of farm work, reduce running costs, and improve profitability. A mounting flange 207 that is attached to a rotary shaft 205 of a tiller, and an arcuate blade-like portion 201A that extends from the mounting flange 207 and bites inward from the surface layer portion of the soil by rotating. A vertical blade 201 and auxiliary blades 203A and 203B formed on the vertical blade 201 and stirring and crushing the soil while leveling the soil are provided. [Selection] Figure 2

Description

  TECHNICAL FIELD The present invention relates to a crushing claw with a projection for a cultivator attached to a rotary shaft of a cultivator, and relates to a crushing claw used when cultivating soil such as a field.

In the conventional rotary type tiller, the claws attached to the rotary shaft have a boomerang-like shape, have a hole to be fixed with a bolt at the base, and the tip is thin so that the soil can be easily crushed.

First, the crushing claws used in this conventional tiller will be described.
FIGS. 7-9 is explanatory drawing which shows the case where the soil of a field is cultivated using the general crushing nail | claw without a processus | protrusion.
As shown in FIG. 7A, a sickle-shaped vertical blade (701) having no protrusion is fixed to a rotating shaft (705) by a fixing bolt (713), and the vertical blade (701) is rotated by the rotation of the rotating shaft (705). Also rotate. FIG. 7B is an enlarged view of one vertical blade. A fixing bolt hole (711) is formed in the vertical blade body (701). Although the method of fixing to the rotating shaft (705) differs depending on the model, the vertical blade (701) also rotates simultaneously with the rotation of the rotating shaft (705), and the circular blade (701) of the rotating crushing claw (700) The blade-like portion (701A) formed in an arc shape cuts into the soil finely by digging into the soil, thereby cultivating the soil.

FIG. 8 shows a plowing operation of a normal crushing claw without projections.
When the rotating shaft (801) rotates and the crushing claw (803) enters the soil in the direction of the arrow (805), the movement of the soil is entangled back as indicated by the dotted arrow (807).

FIG. 9 is a cross-sectional view in the BB direction in (a) of FIG. 8 and shows the moving direction of the crushing claw and the soil. The crushing claw (901) moves in the arrow direction (903).
Soil entrainment return occurs behind the crushing claw, but unlike FIG. 4C, there is nothing to block, so the soil that has been crushed by cultivation is restored. This is a drawback of a general claw without projections, and one of the purposes of the present invention is to suppress this entrainment and crush the soil finely to improve work efficiency.

Japanese Utility Model Laid-Open No. 56-104302 discloses a device related to a soil claw for a leveling device in an agricultural four-wheel tractor. In the said device, the structure by which the curvilinear vertical blade was provided continuously as the distance from the rotating shaft center of a rotary gradually separated is employ | adopted.

Japanese Utility Model Laid-Open No. 6-17045 discloses a device related to a device for preventing accumulation of soil or the like in a rotary tiller. Again, a curved blade is used as a part of the soil while crushing the soil.

Thus, conventionally, a curved nail is attached to a rotary shaft, and the soil is effectively crushed by the nail.

Japanese Utility Model Publication No. 56-104832 Japanese Utility Model Publication No. 6-17405 Japanese Utility Model Publication No. 4-19103

In a conventional cultivator using crushing claws, the soil cannot be finely crushed and the soil is engulfed back, so it has been necessary to pass through the same place with the cultivator many times. In addition, the crushing claws are worn quickly, and it is necessary to change them frequently. This has disadvantages such as an increase in running cost and labor for replacement.
The present invention has been made in view of such circumstances, and it is possible to improve the workability of farm work, and with a protrusion for a cultivator that can improve profitability by reducing the running cost. The purpose is to provide crushing nails.

The invention according to claim 1 is a crushing claw with a projection for a tiller comprising a mounting portion attached to a rotary shaft of the tiller and a vertical blade formed in an arc shape from the mounting portion, the vertical blade A blade-like portion is formed on the outer peripheral portion of the soil, and the blade-like portion bites inward from the surface layer portion of the soil, and an auxiliary blade is provided on the opposite side of the blade-like portion. It is characterized by stirring and crushing the soil while leveling.

The invention according to claim 2 is characterized in that, in the above-mentioned item 1, a plurality of the auxiliary blades are provided on one vertical blade, and the protruding direction of the auxiliary blade is opposite to the rotating direction of the vertical blade. .

The invention according to claim 3 is characterized in that, in the above-described item 1 or 2, the vertical blade body is formed to be curved so as to have a swing width in either the right or left in a plan view.

  According to the present invention, the soil can be finely crushed, the soil can be prevented from being caught back, and the soil can be sufficiently stirred even if the rotational speed of the rotary shaft of the tiller is reduced.

In the conventional tillage machine, this entrainment return occurred, so it was necessary to operate the same area in the field several times. However, if the crush claw with a projection of the present invention is used, the entrainment return can be prevented. , Can reduce the number of cultivator operations.

Moreover, if the claw of this invention is used, since the rotation speed of a rotary can be reduced, the load with respect to an engine can be reduced and it leads also to a fuel-saving.

Furthermore, the crushing claw of the present invention is excellent in durability, so that the crushing claw replacement frequency can be suppressed, and savings such as running cost and replacement time can be realized.

It is the schematic perspective view which showed schematic structure of the cultivator which uses the crushing claw with a projection concerning this invention. It is a perspective view which shows embodiment of the crushing claw with a protrusion which concerns on this invention, Comprising: It is the perspective view which showed the attachment state with respect to the rotating shaft of the tiller to which four crushing claws were fixed. It is explanatory drawing which showed the effect | action at the time of embodiment of the crushing claw with a protrusion which concerns on this invention. It is the figure showing the soil crushing by the claw with a protrusion which concerns on this invention, (a) of FIG. 4A is the figure which looked at soil crushing from the horizontal, (b) of FIG. 4A is the figure seen from right above. It is the figure showing the crushing of the soil by the claw with a protrusion concerning this invention, and shows the state where the crushing claw bites into the soil from the state of FIG. 4A, and (a) of FIG. FIG. 4B is a view as seen from directly above. It is the figure showing the crushing of the soil by the claw with a protrusion which concerns on this invention, and shows the state which the crushing claw bite into the soil further from the state of FIG. 4B, (a) of FIG. In FIG. 4C, (b) is a view from directly above. FIG. 5 is a cross-sectional view taken along the line AA in FIG. 4, illustrating the movement of crushing claws in the soil and the movement direction of the soil. It is a side view of the small tillage machine which attached the crushing claw with a projection of the present invention. It is a normal crushing claw without projections that is generally used. It is the figure showing the soil crushing by the general claw of FIG. It is arrow sectional drawing along the BB line of FIG. 8, and is the figure showing the movement of the crushing nail | claw in soil, and the moving direction of soil.

  Hereinafter, a suitable embodiment of a crushing claw with a projection for a tiller according to the present invention will be described with reference to the accompanying drawings.

FIG. 1 shows the appearance of a tractor (cultivator) in which the projection crushing claw of the present invention is used. The cultivator's driver is seated in the driver's seat (101), starts the engine (103) and travels to the target field according to the cultivator's operating method. During this travel, only the tire (105) is driven, and the rotating shaft (109) to which the crushing claws are attached does not rotate because the gear is on the neutral side.

When arriving at the target field, the rotation shaft (109) is driven at the place to be cultivated to start the cultivating work with the crushing claws. The rotating shaft (109) is driven by a drive shaft (107) and a gear housed in the chain case (110) via a transmission shaft (not shown) by inserting a gear to transmit the driving force of the engine. It has become so. In the field, after the claw claw with projections (111) fixed to the rotation shaft (109) is lowered to a predetermined position of the soil to be cultivated, the rotation shaft (109) is rotated to start soil cultivation. .

FIG. 2 shows a crushing claw with projections (200) of the present invention fixed to a vertical blade mounting flange (207) through which a rotating shaft (205) passes. As shown in FIG. 2, a plurality of mounting flanges (207) for fixing the crushing claw with projections (200) are provided at predetermined intervals on the rotary shaft (205) of the actual tiller. Note that four crushing claws with projections (200) are attached to one mounting flange (207). The crushing claw with projection (200) is detachably attached to the attachment flange (207) by a vertical blade fixing bolt (209) that penetrates the attachment portion at the base end.

The crushing claw with projection (200) has an arcuate vertical blade (201) extending in an arc shape from the mounting portion, and has a blade portion (201A) formed on the outer peripheral side thereof. Sometimes, the vertical blade (201) bites into the soil from the blade portion (201A) so that the soil is cultivated while being crushed. When the rotating shaft (205) rotates, the crushing claw with projections (200) also rotates the vertical blade mounting flange (207) in the same direction, and the crushing claw with projections (200) also rotates. On the opposite side (peak side) of the blade-like portion (201A), two projections (203A, 203B) serving as auxiliary blades are formed by welding or the like in the vicinity of the tip portion and at a position slightly spaced from the tip portion. It is provided to stand up.
The rotation direction rotates in the direction opposite to the direction of the protrusions (203A, 203B) (counterclockwise in the case of FIG. 2).

FIG. 3 is an explanatory view showing a single crushing claw with projections (300). The rotating shaft (307) rotates in the direction of the arrow (309), and the crushing claw with projections (300) rotates in the direction of the arrow (311). The main body of the vertical blade (301) is formed with a gentle arcuate blade portion (301A) and a curved portion (305) having a swinging width to the left or right with respect to the rotation direction. A bolt hole (313) for fixing to the mounting flange (207) of the rotating shaft (205) is provided at the base of the main body of the vertical blade (301). The difference between (a) and (b) is only the difference in the angle of the viewpoint, and (a) and (b) are exactly the same as the mechanism of the crushing claw with projections (300).
In the above crushing claw with projections (200) and (300), two projections are provided, but any number of projections may be used.

FIG. 4A shows one crushing claw with protrusions at the moment of contact with soil (409). (A) The figure is the figure which looked at the cultivation work by a tiller from the side, (b) The figure is the figure seen from the direction of the arrow b of (a) figure, ie, right above. The rotating shaft (401) rotates clockwise, and the vertical blade (403) also rotates accordingly. An arrow (411) indicates the rotation direction of the crushing claw with protrusions, and the arrow (411) rotates in the direction opposite to the direction in which the protrusions (405) that are auxiliary blades rise.
As shown in FIG. 4A (b), when viewed from directly above (plan view), a curved portion (407) bent so as to swing in either the left-right direction is provided near the tip of the vertical blade (403). Is formed.

FIG. 4B shows the movement of the soil immediately after the vertical blade (403) enters the soil when the crushing claw with protrusions (400) tills the soil. Parts such as the rotating shaft and crushing claw with protrusions, and the difference in viewpoints between (a) and (b) are the same as in FIG. 4A.
The arrow (413) indicates the traveling direction of the crushing claw with protrusions (400) in the soil, but the arrow (415) indicated by a dotted line indicates the cultivated soil after the crushing claw with protrusions passes through the soil. It represents movement. As indicated by the dotted arrow (415), the cultivated soil moves toward the locus of the crushing claw with projections (400). This movement is called entanglement return.

FIG. 4C shows a state in which the soil tillage is further advanced and the crushing claw with protrusions (400) has entered deep into the soil. Parts such as the rotating shaft and crushing claw with protrusions, and the difference in viewpoints between (a) and (b) are the same as in FIG. 4A. The meanings of the arrow and the dotted arrow are the same as those in FIG. 4B. When the claw claw with protrusions enters deep into the soil, the degree of entrainment return increases.

FIG. 5 is a cross-sectional view taken along line AA in FIG. 4C (a), and shows the crushing claw with protrusions (400) and the moving direction of the soil. The claw with projections (400) moves in the direction of the arrow (507). In the rear of the crushing claw with projections (400), particularly in the vicinity of the projections (405A, 405B), a movement of the soil involving reversion occurs.
When this entrainment return occurs, the soil divided and crushed by the blade-like portion (403A) of the crushing claw with projection (400) returns to the original place, so that the cultivation efficiency is lowered and the same place is repeated many times. It must be cultivated with a cultivator.
However, since the crushing claw with projections (400) of the present invention crushes the soil so that it is finely crushed by the projections (405A, 405B) which are auxiliary blades, it is possible to minimize this rewinding movement. It becomes possible.

FIG. 6 shows a small cultivator (600), and the crushing claw with a projection (607) according to the present invention has versatility that can be used for various cultivators. The small cultivator (600) of the figure is of a type in which an operator holds the handle (601) with both hands and drives while walking. When the traveling tire (603) is rotated by the power of the engine and the rotation shaft (605) is further driven, the crushing claw with projections (607) fixed thereto is also rotated, and the tilling work can be performed.

According to the present embodiment, when the crushing claw has a projection that functions as an auxiliary blade, it is possible to suppress the entrainment and return, and as a result, the soil can be finely crushed. This also eliminates the need to work the same place in the field with the tiller multiple times, making it possible to improve the durability of the tiller and crushing claws and reduce various expenses such as fuel costs.

As described above, according to the present invention, the soil can be finely crushed even if the rotation speed of the cultivator is reduced, wear of crushing claws can be suppressed, and the durability can be improved. . In addition, running costs such as fuel costs can be reduced, which is suitable for resource saving purposes.

DESCRIPTION OF SYMBOLS 101 Driver's seat 103 Engine 105 Tire 107 Drive chain 109 Rotating shaft 110 Chain case 111 Crushing claw with projection 200 Crushing claw with projection for cultivator 201 Vertical blade 201A Blade portion 203A 203B Projection (auxiliary blade)
205 Rotating shaft 207 Vertical blade mounting flange 209 Vertical blade fixing bolt 300 Crushing claw with projection 301 Vertical blade 301A Blade portion 303A 303B Projection (auxiliary blade)
305 Bending portion 307 Rotating shaft 313 Fixing bolt hole 400 Crushing claw 401 with protrusion Rotating shaft 403 Vertical blade 405A 405B Protrusion (auxiliary blade)
407 Curved portion 409 Soil 501 Vertical blade 503 Protrusion (auxiliary blade)
601 Handle 603 Running tire 605 Rotating shaft 607 Crushing claw with projection 701 Vertical blade 703 Fixing bolt 705 Rotating shaft 709 Rotating shaft main body 711 Fixing bolt hole 801 Rotating shaft 803 Crushing claw 901 Crushing claw

Claims (3)

A crushing claw with a projection for a cultivator comprising a mounting portion attached to a rotary shaft of a tiller and a vertical blade formed in an arc shape from the mounting portion, the blade-like portion on the outer peripheral side of the vertical blade Is formed and bites inward from the surface layer portion of the soil by the blade-shaped portion, and an auxiliary blade is provided on the opposite side of the blade-shaped portion, and the blade-shaped portion and the auxiliary blade are stirred while leveling the soil.・ Crushing claws with protrusions for cultivators characterized by crushing. 2. The claw claw with a projection for a tiller according to claim 1, wherein a plurality of the auxiliary blades are provided on one vertical blade, and a protruding direction of the auxiliary blade is opposite to a rotating direction of the vertical blade. . The claw claw with a projection for a tiller according to claim 1 or 2, wherein the vertical blade body is curved so as to have a swinging width in either the right or left in a plan view.

Images