JPS59232001A - Rotary plough - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Detailed Description of the Invention] This invention relates to a plow that digs up and turns cultivated soil in rice paddies and fields, and more specifically,
This relates to a rotary disc plow that is disc-shaped.

In rice paddies and fields, before planting crop seedlings or sowing seeds, the soil is dug up and turned over in order to plow it up. This work of turning over the cultivated soil is
Today, mechanical power is being utilized by tractors and the like, and a tool that is often used for tractor work is a so-called disk-shaped disc plow. This disc plow has a so-called bowl-shaped concave rake surface, and is used to plow the cultivated soil by inserting it into the cultivated soil and pulling it with a tractor or the like.

Although this disc plow is usually towed without rotating itself, a so-called rotary type plow has also been proposed in which the disc plow is towed while rotating.

The latter rotary type is particularly effective as a means of compensating for a lack of traction power when towing with a relatively small tractor. However, when rotating a disc plow, a strong rotational resistance is applied to the scabbard, so a sufficient rotational force is required to rotate the plow against this resistance, which poses a major problem.

The rotational resistance applied to the disc plow mainly depends on the resistance given to the plow by the adhesion of cultivated soil to the rake face, and the magnitude of this resistance is greatly influenced by the contact area between the rake face and the cultivated soil. However, reducing the diameter of the disc plow is extremely disadvantageous from the viewpoint of plowing the cultivated soil, such as not being able to dig the cultivated soil to a deep depth.

Conventional disc plow attachments used on tractors, etc. are all equipped with a single disc plow, but this requires a certain amount of rotational force to equip multiple disc plows. Because it does. However, a single disc plow can only plow a very narrow area in one run and is not efficient.

This invention was made to solve these conventional problems, and it is a so-called rotary disc plow that has a special feature that allows cultivated soil to be separated by rotary traction with relatively low rotational resistance even if the diameter is large. This paper proposes a new structure that solves the above-mentioned problems. Hereinafter, the configuration of the present invention will be explained in detail based on illustrated embodiments.

As shown in FIGS. 1 and 2, the rotary disc plow A according to the present invention includes a disc 1 having a concave rake surface 2, and a disc plow provided on the central axis of the disc 1 to rotate the disc 1. It consists of a rotating shaft 3. In this case,
The rake face 2 is not provided uniformly over the entire surface of the disk 1, but is provided intermittently over the radial direction, and gaps 4 are provided therebetween.

In the illustrated rotary disc plow A, several ring-shaped plates 6, 6- are arranged concentrically around the rotating shaft 3.
The spokes 7.7 are spaced apart from each other so as to form a bowl shape as a whole, and the spokes 7.7 extend radially from the boss 5.
- are fixed to each other by. Therefore, rake faces 2 are formed intermittently in the radial direction around the rotating shaft 3, and gaps 4 are formed between the rake faces 2. In this case, the same purpose can be achieved even if the plates 6.6--...- are arranged in a spiral manner around the rotating shaft 3 instead of arranging ring-shaped plates concentrically. .

The strength of the rotational resistance applied to the rotary disc plow is
As already mentioned, it depends on the contact area between the rake face 2 and the cultivated soil. In view of the above points, in the rotary disc plow A according to the present invention, the contact area between the cultivated soil and the rake surface 2 can be narrowed, so that the rotational resistance can be weakened.

On the other hand, concerns may be raised that the existence of the gap 4 may pose a problem in plowing the cultivated soil. According to tests conducted by the inventor of the present invention, it has been found that there is no problem at all as long as the width of the rake face 2 and the width of the gap 40 are approximately the same. The cultivated soil that is plowed with the rotary disc plow A is not a sandy soil, but rather a rather viscous soil, and rather, it is precisely in such soil that rotational resistance becomes a problem. In such soil, since the bonding force between soil particles is strong, the cultivated soil sheared from the stratum is raised almost as one by the rake face 2 of the rotary disc plow A, so there is some gap 4 on the rake face 2. However, there is almost no problem.

By rotating the rotary disc plow A while pulling it, the cultivated soil is easily sheared and can be pulled with a relatively small traction force. And in this case,
Since the resistance accompanying the rotation of the rotary disc plow A is weak, the plow A can be rotated with a relatively weak rotational force, and thus the cultivated soil can be plowed with a generally small force.

Further, due to these advantages, it is also possible to attach several rotary disc plows A to an attachment for rotary disc plows and tow them while rotating them simultaneously. 3 to 5 show an example of this use. In this case, the rotation of the transmission shaft 9 rotated by the engine (not shown) of the tractor 8 is
It is transmitted to the rotating shaft 3 of the rotary disc plow A via the gear mechanism 11 in the gear box 10. Here, the rotating shaft 3 extends obliquely forward with respect to the traveling direction of the tractor 8, and several (three in the illustrated case) rotary disc plows A are attached to it. This rotary disc plow A is pulled by a tractor 8 while rotating, thereby plowing the cultivated soil in a fixed direction. In this case, the tractor 8 moves in a certain direction while plowing the cultivated soil, and when it reaches the edge of the paddy field or field, the rotating shaft 3 is switched from the side shown by the solid line to the side shown by the two-dot chain line in Fig. 4. At the same time, by reversing and moving the tractor 8, the cultivated soil can be plowed twice from different directions with one reciprocation of the tractor 8. FIG. 5 shows a gear mechanism 1 for reversing the direction of the rotating shaft 3 from one side of the tractor 8 to the other side.
The rotation of the transmission shaft 9 can be transmitted to the rotation shaft 3 while changing the direction of the rotation shaft 3 by the combination of the head gears.

As described above, according to the rotary disc plow according to the present invention, the plow can be rotated with a relatively weak rotational force.

In addition, by rotating the same plow, it is possible to plow and tow the cultivated soil even with a relatively weak traction force, so it is possible to easily carry out the work even with a generally weak tractor, etc. This makes it possible to tow several rotary disc plows.

[Brief explanation of drawings]

FIG. 1 is a longitudinal sectional side view showing one embodiment of the present invention, and FIG.
3 is a side view showing an example of the use of the rotary disc plow according to the present invention, FIG. 4 is a schematic plan view of the main parts, and FIG. 5 is an explanatory diagram of the main part mechanism. It is. 1-Disk 2-Rake face 3-Rotation axis
4-Gap patent applicant Osamu Yamazaki Agent Patent attorney Kazuyoshi Hojo Figure 1 Figure 2

Claims (1)

[Claims] 1. In a rotary disc plow, which has a concave rake face and a rotary shaft for rotating the disc at the center thereof, the rake face exists intermittently over the radial direction of the main body. A rotary disc plow is characterized in that a gap is formed between the two. 2. The rotary disc plow according to claim 1, wherein the rake faces are formed at intervals on concentric circles centered on the rotation axis. 3. The lorry-disk plow according to claim 1, wherein the rake face is formed along a spiral centered on the rotation axis.