JPH0440403Y2 - - Google Patents

Description

[Detailed Description of the Invention] (Industrial Application Field) The present invention relates to a rotary tiller, and relates to an improved arrangement of tiller claws.

(Prior art) Conventionally, the arrangement method of tilling claws in rotary tillage equipment can be broadly classified into flange type, holder type and special type, but in any of these methods, it is difficult to till and crush the soil. It differs from the disk method and bottom plow method in that it can perform both at the same time.

Therefore, for example, Japanese Utility Model Publication No. 34-4903 describes a tillage device that performs the above-mentioned tillage and crushing at the same time.
A tilling shaft and spaced apart in the axial direction of this tilling shaft,
A plurality of curved knife cultivating claw groups protruding radially on the same plane, and a plurality of curved knife cultivating claw groups protruding radially on the same plane with respect to the tilling axis between the plurality of curved knife cultivating claw groups adjacent in the axial direction. In other words, a group of curved tilling claws radially protruding on the same plane and a group of cutting blades radially protruding on the same plane are alternately arranged at a distance in the axial direction of the tilling shaft. Arrayed structures are known.

(Problems to be solved by the invention) In the structure described in the above publication, the cutting blade group cuts the cultivated soil vertically between the curved blade cultivation claw groups, and
By plowing and inverting the cultivated soil with a group of cutting blades and a group of curved blades, the soil that is being plowed and inverted is made into small clumps suitable for planting crops. It can be said that it is preferable when crops are immediately planted in a field where the tilled soil has been turned over using the tilling claw group.

However, since the structure described in this publication is plowed and crushed into small lumps of soil, it can be used in autumn work where crops are not immediately planted, or in wet fields, where the dry soil effect is applied, i.e., the soil is dried and the fertilizer in the soil is absorbed. In addition, since there is no cutting blade interposed in the curved blade cultivating claw group on the same plane, there may be rough ground such as straw on the tip curved part of the curved blade cultivating claw group. There is a problem in that organic matter tends to get entangled, and it is insufficient to bury these coarse organic matter into the soil.

Furthermore, even if the cutting blade group is arranged between the axially adjacent curved knife cultivating claw groups, the curved knife cultivating claw groups at each position in the axial direction are all composed of curved knife cultivating claws, so the cutting blades are relatively large. There are also problems such as the propulsion force pushing the tractor from behind.

Therefore, the present invention was developed in view of the above points, and it can be cultivated as a large soil lump that can be expected to have a dry soil effect, and the coarse organic matter in the field can be reliably buried, and the coarse organic matter can be cultivated with a curved knife. It is an object of the present invention to provide a rotary tiller that can prevent entanglement with nails and reduce the driving force and the effect of pushing the tractor from behind.

(Means for Solving the Problems) The rotary tilling device of the present invention includes a machine frame 1 and a rotary work body 3 rotatably provided on the machine frame 1, and the rotary work body 3 includes: A tilling shaft 4 rotatably horizontally suspended on the machine frame 1, a plurality of flanges 5 formed at intervals in the axial direction on this tilling shaft 4, and a plurality of flanges 5 each having a rotatable shaft centered around the tilling shaft 4. It consists of a plurality of straight tilling claws 7 and a plurality of curved tilling claws 6 that protrude radially as shown in FIG. The two curved blade cultivating claws 6 are respectively protruded in the position where the tip curved blade portions are directed in opposite directions, and the two curved blades are rotated in the direction of rotation with the cultivating shaft 4 in the middle.
The two straight knife cultivating claws 7 are provided protrudingly at positions shifted in phase with respect to the curved knife cultivating claws 6 of the book, and the curved knife cultivating claws 7 are provided between the flanges 5 adjacent to each other in the axial direction. The claw 6 and the straight knife cultivating claw 7 are provided so as to project out of phase with each other in the rotational direction.

(Function) In the rotary tilling device of the present invention, when the rotary work body 3 is advanced while being rotationally driven, each of the radial straight tilling claws 7 alternately arranged with respect to each flange 5 of the tilling shaft 4. By the cutting action of the blade and the tilling reversal action of each of the curved tilling claws 6, the tilled soil is successively turned over as a large soil lump.

In addition, coarse organic matter scattered on the ground surface is cut by each straight knife cultivating claw 7 at each flange 5, and is cultivated by each curved knife cultivating claw 6 that rotates on the same plane as each straight knife cultivating claw 7. It is buried under a large soil mass due to the upturning action. At this time, the coarse organic matter is cut by each straight knife cultivating claw 7, thereby preventing the coarse organic matter from becoming entangled with each curved knife cultivating claw 6.

(Embodiment) Hereinafter, the structure of an embodiment of the present invention will be described based on the accompanying drawings.

In the figure, 1 is a machine frame, and this machine frame 1 consists of a main frame that is long in the left and right direction, opposing left and right brackets whose upper ends are fixed to both ends of the main frame in the length direction, and two brackets on one side of the main frame. The chain case 2 is provided on the outer side of the bracket.

Further, both ends of a tilling shaft 4 of the rotary work body 3 are rotatably supported between the lower ends of the left and right brackets of the machine frame 1, and one end of the tilling shaft 4 is placed inside the chain case 2. It is rotatably protruded.

The rotary work body 3 includes a tilling shaft 4 rotatably supported between the lower ends of the left and right brackets.
, a plurality of flanges 5 integrally formed on the tilling shaft 4 at predetermined intervals in the axial direction, and a plurality of straight flanges protruding radially from each of the flanges 5 around the respective tilling shafts 4. It is equipped with a sword cultivating claw 7 and a plurality of curved sword cultivating claws 6, and each of the above-mentioned flanges 5
In this case, as shown in FIGS. 3 and 4, the blades are placed at positions approximately 180 degrees out of phase with each other in the direction of rotation around the tilling shaft 4, with their respective tip curved portions facing in opposite directions. The above-mentioned two curved knife cultivating claws 6 are respectively provided protrudingly, and the bases of these two curved knife cultivating claws 6 are detachably fixed to the respective flanges 5 by a plurality of bolts and nuts 8. It is worn. Further, as shown in FIGS. 3 and 4, each of the flanges 5 has an approximately 90-degree phase with respect to the two curved tilling claws 6 in the direction of rotation about the tilling shaft 4. The two straight knife cultivating claws 7 are respectively provided in a protruding manner at shifted positions, and the bases of these two straight knife cultivating claws 6 are attached to and detached from the respective flanges 5 by a plurality of bolts and nuts 8. It is attached freely. Between the flanges 5 adjacent to each other in the axial direction, the curved blade cultivating claws 6 and the straight blade cultivating claws 7 are protruded with a phase shift of approximately 90 degrees in the rotational direction. In each flange 5, the curved blade cultivating claws 6 and the straight blade cultivating claws 7 are arranged alternately on substantially the same plane in the rotational direction and protrude radially.

Next, a cover body 9 that covers the upper part of the rotary work body 3 is fixed between the upper parts of the left and right brackets, and a leveling plate 10 is attached to the rear end of the cover body 9 via a hinge and rotated in the vertical direction. The flat plate 10 is attached movably, and the rear end portion of the flat plate 10 is suspended by a suspension support rod 11 and a coil spring 12 wound around the suspension support rod 11 so as to be vertically movable.

In addition, a transmission 14 is provided in the middle of the main frame of the machine frame 1 and is rotatably protruded with the input shaft 13 facing forward. One end of the tilling shaft 4 of the rotary work body 3 is rotatably coupled to the rotary work body 3 via a coupling medium such as a chain suspended on the rotary work body 3. Further, a connecting frame 15 is integrally provided on the main frame of the machine frame 1 and protrudes forward, and a gauge wheel 16 is attached to the left and right sides of the connecting frame 15 so as to be able to adjust its vertical position. There is.

Next, the operation of the above structure will be explained.

The connecting frame 15 of this machine is connected to the suspension mechanism of the tractor, and the input shaft 13 of this machine is interlocked and connected to the power take-off shaft of the tractor via a universal joint.

When the machine is towed by a tractor and the input shaft 13 is rotated by the output from the tractor's power output shaft, the rotary work that is interlocked with the transmission 14 via the interlocking medium is rotated. The rotating shaft 4 of the body 3 is driven to rotate, and each flange 5 of the tilling shaft 4 is subjected to cutting action by a plurality of radially arranged straight tilling claws 7 and by each curved tilling claw 6. Due to the tillage reversal action, the cultivated soil in the field is gradually turned over as large soil lumps.

In addition, coarse organic matter scattered on the ground surface is sequentially cut by the plurality of straight blade tilling claws 7, and these coarse organic matter are combined with the plowing reversal action of the soil clod by each curved knife tilling claw 6 to form large soil clods. The project will proceed while being buried under the Then, the large clods are sequentially surface-treated to be flat by the leveling plate 10.

In the above case, in each flange 5, the straight knife cultivating claws 7 and the curved knife cultivating claws 6 are arranged alternately on the same plane and protrude, so that coarse organic matter is cut by each straight knife cultivating claw 7. By doing so, coarse organic matter is prevented from becoming entangled with each curved knife plowing claw 6.

Furthermore, since the tilling claw group is composed of straight knife cultivating claws 7 and curved knife cultivating claws 6 which are arranged alternately on each flange 5, it is substantially smaller than the case where the whole is composed of curved knife cultivating claws. Plowing is carried out using soil clods that are about three times as large, and since the vibration of the rotary work body 3 is small and the propulsive force is also relatively small, the effect of pushing the tractor from behind is reduced.

(Effects of the invention) According to the invention, the plurality of flanges formed at intervals in the axial direction of the tilling shaft each have a plurality of flanges arranged at positions approximately 180 degrees out of phase with each other in the direction of rotation about the tilling shaft. Two curved sword cultivating claws are respectively provided with the curved tip portions of the blades facing in opposite directions,
Two straight blade tilling claws are provided protrudingly at positions shifted from each other in phase with respect to the two curved knife cultivating claws in the direction of rotation around the tilling shaft, and the flanges adjacent to each other in the axial direction are In between, each of the curved blade cultivating claws and the straight sword cultivating claws are projected with a phase shift in the rotational direction, so that at each flange, the two straight sword cultivating claws and the two curved sword cultivating claws are different from each other. , alternately arranged in the same plane on each flange,
The tilled soil is sequentially cut vertically with this straight knife tilling claw, and the tilled soil is sequentially tilled and reversed with the curved tilling claw, and the interaction between the straight knife tilling claw and the curved knife tilling claw allows the soil to be cut in the same plane. Compared to the case where only a plurality of curved tilling claws are provided in a radial manner, the tilled soil can be turned over as a large soil lump, and the dry soil effect can be reliably promoted.

In addition, tilling and reversing the tilled soil is performed using multiple curved tilling claws, and the tilling and reversing of the cultivated soil is not done using multiple straight blade tilling claws. It is possible to reduce the tilling resistance compared to the case where the tiller is provided with a straight tiller, and the propulsive force can be reduced by each straight tiller claw, thereby reducing the effect of pushing the tractor from behind.

Furthermore, coarse organic matter can be reliably cut by each straight knife tilling claw in the same plane as each curved knife tilling claw, and this coarse organic matter can be prevented from getting entangled with each curved knife tilling claw, and each curve Coarse organic matter can be reliably buried in the soil using the blade. Therefore, it is particularly suitable for use in autumn plowing work and as a plowing device in wet fields.

[Brief explanation of the drawing]

The figures show one embodiment of the present invention, in which Fig. 1 is a side view of a tilling and crushing machine, Fig. 2 is an enlarged front view of a part of the rotary tiller, and Fig. 3 is an A-A of the same.
4 is a sectional view taken along the line BB in FIG. 2. 1... Machine frame, 3... Rotary work body, 4...
Cultivating shaft, 5...flange, 6...curved cultivating claw, 7
...A straight sword and a sharp blade.

Claims (1)

[Scope of Claim for Utility Model Registration] A machine frame and a rotary work body rotatably provided on the machine frame, the rotary work body having a tillage shaft and a tilling shaft rotatably suspended horizontally on the machine frame. , a plurality of flanges formed on the tilling shaft at intervals in the axial direction, and a plurality of straight tilling claws and a plurality of curved tilling claws respectively protruding radially from each flange around the tilling shaft. Each of the flanges has two curved blades with their tip curved blades facing in opposite directions at positions approximately 180 degrees out of phase with each other in the direction of rotation around the tilling axis. The two above-mentioned cultivating claws are respectively provided in a protruding manner, and are positioned at positions shifted in phase with respect to the two curved knife cultivating claws in the direction of rotation about the tilling shaft.
A straight sword cultivating claw is provided protrudingly, and between each axially adjacent flange, the curved knife cultivating claw and the straight knife cultivating claw are provided protrudingly with a phase shift in the rotational direction. Characteristic rotary tillage device.