JPS642322B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a ground leveling method using a dish-shaped rotating body for a tractor.

2. Description of the Related Art Rotary work machines including a dish-shaped rotating body connected to the rear of a tractor via a three-point link are well known as, for example, disc harrows, disc plows, and the like.

In the case of disc plows, it is known, for example, from Japanese Patent Publication No. 10961/1983, that the effect of turning over the cultivated soil is better when a rotation peripheral speed higher than the traveling speed is applied.

In addition, the so-called multiple plate-shaped rotary work machine, in which a pair of left and right rotating shafts each having a plate-shaped rotating body on a machine frame towed by a tractor, is arranged in a figure-eight shape extending rearward in plan view, was developed in the 1970s. It is known from Publication No. -5854.

This working machine was used for relatively shallow plowing and crushing, and although the traction force increased even when the dish-shaped rotating body was sunk deeply, it was not possible to turn over the plowed soil or crush the soil much.

Therefore, there are some models that drive the disc-shaped rotating bodies, but this drive type drives each disc-shaped rotating body separately.
No. 10961 is known, and a type in which each plate-shaped rotating body is tilted in the same direction using a single drive shaft is also known.

Although this drive type has good soil reversibility even when plowing deeply, the traction reaction force is biased toward the slope direction, making it difficult to maintain straightness.

In the United States and other countries, attempts have been made to drive two pairs of left and right multiple plate-shaped rotating bodies to be pulled by a tractor. The parts are separated, and there is a defect in which there is an untreated part in the center of the grading width.

In addition, even if you try to move the left and right dish-shaped rotating bodies closer to each other by driving from the outside end of the mounting shaft, when the soil leveling depth is increased, the soil will be pushed from the left and right in the center, and theoretically the center part will be reversed. The effect was not as expected.

Therefore, the present invention has been developed to ensure straight travel without losing the left-right balance of traction force even if the mounting shaft having multiple dish-shaped rotating bodies is configured in a figure-eight shape when viewed from above, and to increase the depth of soil preparation. However, in the present invention, it is possible to reduce the occurrence of an untreated portion in the center without inhibiting the soil inversion effect in the center. In a method of leveling a field using a dish-shaped rotary body installed at axial intervals on a mounting shaft, the central part of the grading width to be crushed by the dish-shaped rotary body is ground prior to leveling with the dish-shaped rotary body. Soil is cultivated using a partial tillage tool, and the soil is crushed by a dish-shaped rotating body on a mounting shaft arranged in a figure-eight shape when viewed from above, expanding backward toward the area tilled by the partial tillage tool. The present invention provides a tillage method using a dish-shaped rotating body for a tractor, which is characterized by collecting soil by releasing it.

Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings and a machine used therein.

In FIG. 1, reference numeral 1 denotes a tractor, which in this example has a wheel shape, and a hydraulic device 4 having a pair of left and right lift arms 3 is provided on a tractor body 2.

Reference numeral 5 denotes a rotary ground leveling work machine, which is connected to the tractor 1 via a three-point link 8 consisting of a top link 6 and a pair of left and right lower links 7, and is connected to the tractor 1 through a three-point link 8 consisting of a top link 6 and a pair of left and right lower links 7. By connecting them with a lift rod 9, it can be raised and lowered freely.

The work machine 5 has a rotary power transmission mechanism 13, which receives the rotary power from the tractor PTO shaft 11 via a joint shaft 12, at the center in the left-right direction at the front of the machine frame 10. In this embodiment, as shown in FIG. The mechanism 13 is enclosed by a case 14.

Further, in this embodiment, the rotational power transmission mechanism 13 includes a wrap transmission mechanism 16 surrounded by a case 15, and a terminal shaft 17 oriented in the left-right direction at the bottom.
It is equipped with

Reference numeral 18 denotes a pair of left and right mounting shafts, each outer end of which is rotatably supported via a bearing 20 by a support frame 19 installed below the left and right sides of the machine frame 10;
The inner ends of the pair of left and right mounting shafts 18 are interlocked and connected to both ends of the aforementioned terminal shaft 17 via joints 21, respectively.

Therefore, the pair of left and right mounting shafts 18 are shown in FIGS. 2 and 5.
As shown in the figure, they are arranged in a figure-eight shape that expands rearward in plan view, and are rotatable on the same horizontal plane.

Reference numeral 22 designates a dish-shaped rotating body, which has a blade portion 23 on its outer periphery, has a recessed side surface to form a soil releasing portion 24, and is shaped like a bowl, and is arranged on the axis of the mounting shaft 18 at a predetermined interval in the axial direction. It is fixedly installed in the mantle.

In this embodiment, as shown in FIGS. 3 and 4, the blade portion 23 is shaped like a claw, and the central boss 25 is attached to the mounting shaft 1.
8, and furthermore, a collar 26 for preventing winding and regulating spacing is interposed on the boss 25, and these are fastened and connected in the axial direction to be integrated.

Thus, the dish-shaped rotating body 22 is configured such that the soil releasing portions 24 face inward to each other, and each inner end of the mounting shaft 18 is connected to the terminal shaft 17 via a joint 21, and each outer end is connected to a bearing 20. It is supported in a figure-eight shape on a plane.

Reference numeral 27 denotes a partial tillage tool, which in this embodiment is installed on the machine frame 10 side (case 1
4 or a bracket extending from the machine frame 10).

Therefore, in this example, the partial tillage tools 27 are shoe-shaped, and in this example, they are provided not only in the center in the left-right direction but also on the left and right sides. It is sometimes said to be advantageous in puddling work. For other operations, even the central partial tilling tool 27 is sufficient.

In addition, in FIG. 2, 28 is a connecting rod,
The left and right support rods 19 are connected to each other.

Next, the present invention will be explained while explaining the operation.

When plowing a field, the rotary soil leveling machine 5 is pulled down by the tractor 1 and the tractor PTO shaft 11 is driven to rotate.

Then, first, the field is cut and tilled by the partial tillage tool 27, and the partial tillage tool 27 at least partially tills in advance between each inner end of the attachment shaft 18 through which the terminal shaft 17 passes. Therefore, even if an uncultivated area is created by the dish-shaped rotating body 22 on the mounting shaft 18, the left and right center areas in the width direction of the land are left untreated due to the preliminary tillage by the partial tillage tool 27. It won't happen.

On the other hand, the rotational power from the PTO shaft 11 is transmitted to the terminal shaft 17 of the rotational power transmission mechanism 13, and a pair of left and right mounting shafts 18 are interlocked and connected to the outer end of the terminal shaft 17 via a joint 21. Since each outer end of is rotatably supported by a support rod 19 through a bearing 20, a pair of left and right mounting shafts 18
Both will be rotationally driven under the same conditions. Moreover, the mounting angle of the mounting shaft 18, that is, the angle adjustment of the figure-eight shape in plane, can be easily adjusted by the joint 21.

A dish-shaped rotary body 22 is fixed to the pair of left and right mounting shafts 18, and has a blade part 23 on the outer periphery and a soil release part 24 recessed in the side surface. Since the disc-shaped rotating body 22 is arranged in a rearwardly expanding shape, the disc-shaped rotating body 22 is rotationally driven, and the blade part 23
At the same time, the soil is collected by releasing the crushed soil in the direction of the arrow in FIG. 5 while holding the soil in with the soil releasing part 24.

Since the plate-shaped rotating body 22 is rotationally driven, the soil is crushed by the plate-shaped rotating body 22, so that the blade portion 2
Even if the soil leveling depth is below the leveling depth, the soil is crushed without the traction force of the tractor 1 increasing significantly. Grass, straw, etc. can also be buried between the gravel and the gravel by sending it into the center of the direction.

Furthermore, since the inner ends of the mounting shaft 18 are spaced apart in the left-right direction, the soil thrown by the dish-shaped rotating body 22 fixed on the shaft 18 will not be pushed against each other from the left and right, and the soil will be distributed evenly on the left and right. The crushed soil is sent to the central part, where the straight-line grooves are formed by the dish-shaped rotating bodies 22 at both the left and right outer ends without significantly impairing the straightness, and the entire surface leveling and crushing between the grooves is carried out. It will be done.

In short, according to the present invention, the tractor 1
In a method of leveling a field using a dish-shaped rotating body 22 mounted at an axial interval on a mounting shaft 18 that is rotationally driven by receiving rotational power from a PTO shaft 11, the soil is crushed by the dish-shaped rotating body 22. Prior to crushing the soil by the plate-shaped rotating body 22, the central part of the land preparation width is
7, and crushed soil by the dish-shaped rotating body 22 on the mounting shaft 18 disposed in a figure-eight shape in plan view, expanding backward toward the part tilled by the partial tillage tool 27. Since it is characterized by releasing and collecting soil, it has the following advantages.

Since the central part in the tilling width direction is tilled with the partial tilling tool 27 prior to the dish-shaped rotating body 22, the mounting shaft 18 is arranged in a figure-eight shape in plan view, and the dish-shaped rotating body 22 on the same axis 18 is used to level the ground. However, there will be no untreated area in the center of the graded width.

Also, from both sides of the tilled soil part of the partial tillage tool 27,
Since the crushed soil is collected by the dish-shaped rotating body 22, the soil can be reliably turned over, and as a result, there is no uncultivated part in the width direction of the leveling section, and the center is in a swollen state. be able to.

[Brief explanation of drawings]

The drawings show a working machine used in an embodiment of the present invention, in which FIG. 1 is a schematic side view of the entire structure, FIG. 2 is a plan view, FIG. The AA line arrow diagram and FIG. 5 are schematic plan views showing the outline of the rotational power transmission mechanism. DESCRIPTION OF SYMBOLS 1... Tractor, 5... Work equipment, 8... Three-point link, 10... Machine frame, 13... Rotary power transmission mechanism, 17... End shaft, 18... Mounting shaft, 21...
Joint, 22...Dish-shaped rotating body, 23...Blade portion, 24...Release portion, 27...Partial tillage tool.

Claims (1)

[Scope of Claims] 1. A method for leveling a farm field using a dish-shaped rotating body 22 mounted at an axial interval on a mounting shaft 18 that is rotationally driven by receiving rotational power from a PTO shaft 11 of a tractor 1. , The central part of the land width to be crushed by the dish-shaped rotary body 22 is cleared using the partial tillage tool 2 before the soil is leveled by the dish-shaped rotary body 22.
7, and crushed soil by the dish-shaped rotating body 22 on the mounting shaft 18 disposed in a figure-eight shape in plan view, expanding backward toward the part tilled by the partial tillage tool 27. A land leveling method using a dish-shaped rotary body for a tractor, which is characterized by collecting soil by releasing it.