JPH089708A - Rotary tiller - Google Patents

Abstract

PURPOSE:To enable high-speed tilling work with a rotary tiller attached to a tractor. CONSTITUTION:This rotary tiller to be attached to a tractor has a pair of chisels positioned one for each of the right and left boundary lines at the outermost parts of the tilling width. A coulter is attached to the front part of the chisel. A fixing apparatus to disable the rotation of the rear cover in the case of performing high-speed tilling is formed between a lift rod 8 and a rear cover locking member 9. A claw bed is formed in such a manner as to present six claws on the same circumferential face of the tilling claw shaft.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention enables high-speed tillage in a rotary tiller attached to a tractor.

[0002]

2. Description of the Related Art Conventionally, a technique of disposing a chisel in a rotary tiller has been known. For example, it is like the technique described in Japanese Utility Model Laid-Open No. 57-187004. In addition, as a technique for mounting a coulter on a portion near the end of the plowing width, there is an actual utility model Sho-56-414.
The technique as disclosed in Japanese Patent No. 49 is publicly known.

[0003]

When a rotary cultivator is mounted on a tractor and cultivated, if the working speed is increased, the following problems will occur. First, the rotary tiller moves up and down and the working depth is not stable. In addition, the rotary tiller becomes slightly floating and the plowing depth becomes shallow. In addition, the tail wheel rides over the soil mass and the plowing depth is not stable. In addition, the rear cover moves fluttering, which prevents the ground from being leveled or the auto rotary becomes unstable. Further, the tilling pitch becomes rough, and the trochoidal curve drawn by the tip of the tilling claw rises, so that residual tillage is likely to remain. Also, the required horsepower increases. In addition, the rotary tiller is swung during turning, which easily causes a dangerous state, making it difficult to perform adjacent tillage. Further, the followability of the automatic control device for the left and right inclination of the rotary tiller becomes poor. Also, both ends of the plowing trace become dirty. Also, it is not cut straight. In addition, the tractor can easily dash by being pushed by the rotation of the rotary tiller. In addition, there were problems such as bad reversal of the clod.

The present invention is intended to improve the above-mentioned problems in the case of high-speed tillage, and to provide a chisel, a coulter for cutting straws and clods, and a mechanism for locking the rear cover. Further, since the plowing pitch becomes rough, a trochoid curve is prevented from standing by using a Y-shaped blade. In addition, the side cover of the rear cover is made large so that the finished condition of adjacent tillage can be made beautiful.

[0005]

The problem to be solved by the present invention is as described above, and the means for solving the problem will be described below. According to claim 1, in a rotary tiller mounted on a tractor, one chisel is arranged on the boundary line at the outermost side of the tillage width, and one chisel is arranged on the boundary line to prevent the rotary tiller from floating during high-speed tillage, and thus the tiller width. The cutting of both ends of is straight.

In the second aspect, a coulter is attached to the front part of the chisel, and the coulter cuts the soil in the passage part of the chisel 1 to reduce the clod resistance,
Further, it is configured to cut the straw.

According to a third aspect of the present invention, in a rotary tiller mounted on a tractor, a fixing device is provided between the lift rod 8 and the rear cover lock body 9 to prevent the rear cover from rotating when high-speed tillage is performed. Is.

According to a fourth aspect of the present invention, in a rotary tiller mounted on a tractor, a claw seat is formed so that six claws are present on the same circumferential surface of a tiller claw shaft.

[0009]

According to the first aspect of the present invention, in the rotary tiller mounted on the tractor, one chisel is disposed on the boundary at the outermost side of the tillage width, and one chisel is arranged on the boundary line to prevent the rotary tiller from floating during high-speed tillage. Since the cutting of both ends of the tilling width was made straight, it was possible to prevent the rotary tiller from floating up when high-speed tilling was performed, and to further cut both ends of the boundary portion after tilling straight.

According to the second aspect, a coulter is attached to the front part of the chisel, and the coulter cuts the soil in the passage part of the chisel 1 to reduce the resistance to clods and further to cut the straw. By making a cut in the soil in front of the chisel to reduce the cutting resistance of the chisel and cutting the straw or the like present in the portion, it was possible to prevent the straw from being caught in the chisel.

According to the third aspect of the present invention, in the rotary tiller mounted on the tractor, a fixing device for disabling the rotation of the rear cover is constructed between the lift rod 8 and the rear cover lock body 9 when high-speed tilling is performed. It was possible to avoid the floating of the rear cover, which would occur during high-speed tillage, and to sway up and down, and it was possible to improve the finish of the soil surface after tilling.

According to a fourth aspect of the present invention, in a rotary tiller mounted on a tractor, a rotary tiller mounted on the same circumferential surface of the tiller pawl shaft is
Since the claw seat is formed so that the book claws are present, it is possible to reduce the tilling resistance by the tilling claws even when the tractor is traveling at a high speed and the rotary tiller is used at a high speed. This made it possible to construct a rotary tiller capable of high-speed tillage.

[0013]

EXAMPLES Next, examples will be described. FIG. 1 is an overall side view of the rotary tiller of the present invention equipped with a chisel and a coulter, FIG. 2 is an overall plan view of the rotary tiller of the present invention, and FIG. 3 locks the rear cover so that it cannot be rotated during high-speed tillage. Side view of the rotary tiller equipped with the mechanism, FIG. 4 is a perspective view of the lock mechanism of the rear cover, FIG. 5 is a rear view showing the main part of the rear cover lock mechanism, and FIG. 6 is a side view of the main part of the rear cover lock mechanism. 7 is an enlarged side view of the part of the chisel and the coulter, FIG. 8 is a side view of the cultivating claw shaft 15 when a Y-shape is formed by a hexagonal claw shaft and two claws, and FIG. FIG. 10 is a drawing of the structure of the nail viewed from the rear side, and FIG. 10 is a tillage nail shaft 1 in which one Y-shaped nail 16 is arranged.
5 is a side view of FIG. 5, FIG. 11 is a rear view showing a structure in which two claws form a Y-shaped claw, FIG. 10 is a perspective view of the Y-shaped claw, and FIG. 12 is a rear view of the Y-shaped claw.

The overall construction of the rotary tiller of the present invention will be described with reference to FIGS. 1, 2 and 3. Through the quick hitch frame 30, the tractor and the rotary tiller can be easily mounted. An engagement hook 28 is provided on the upper portion of the quick hitch frame 30, and a lower link engagement hook is also disposed on the lower portion.
A hook operating lever 13 for engaging and disengaging the lower link engaging hook in a state where the lower link engaging vehicle is mounted on a tractor is provided so as to project from the upper portion of the quick hitch frame 30. By operating the hook operating lever 13, the lower link engaging hook is operated via the link 22.

The engagement hook 28 is configured to engage with the engagement pin 21 arranged on the top link mast 29 at the upper portion. By mounting the tractor and the rotary tiller with the quick hitch frame 30, the PTO shaft on the tractor side and the input shaft of the bevel gearbox B on the rotary tiller side can be automatically connected via the universal joint shaft. . Main beams 17, 17 project from the bevel gear box B to the left and right. A cultivating transmission case 7 is fixed to the end portion of the left main beam 17, and the cultivating pawl shaft 1 extends from the cultivating transmission case 7.
5 is configured to be driven.

A Y-shaped claw 16 is fixed to the tilling claw shaft, and a tilling cover 25 is provided along the outer circumference A of the rotation locus of the Y-shaped claw 16. Side covers 24, 24 are fixed to the left and right of the cultivating cover 25. A rear side cover 10 is attached to a rear portion of the side cover 24, and a rear cover 3 is rotatably supported on a rear portion of the tillage cover 25. In this embodiment, the rear side cover 10 is wider than the conventional rear side cover 10 'and extends to the lower end position of the tillage transmission case 7 so that soil does not leak from the lower side.
As a matter of course, the rear side cover 10 has a wide width so that the rear side cover 10 is located on all sides of the rotation range of the rear cover 3.

In the present invention, the chisel 1 and the coulter 4 are detachably attached to the left and right positions of the front portion of the side cover 24 having the above construction. Attach the chisel 1 to the side cover 2
4 is provided in the front portion of the chisel 1 so that the rotary tiller does not float up at the time of high-speed tilling, and the coulter 4 is provided at a position along the chisel 1 so that the soil in the front portion of the chisel 1 is Is cut, and a cut is made in the soil mass and the soil to reduce the cutting load of the chisel 1 arranged next. Further, as shown in FIG. 2, a front guide wheel 2 is arranged between the left and right chisels 1 so as to prevent the rotary tiller from vibrating up and down during high-speed tillage.

Further, FIG. 2 shows a Coulter bracket 5 for mounting the Coulter 4.
The coulter 4 is not always attached, but the support rod 4b of the coulter 4 is inserted and fixed to the coulter bracket 5 only when necessary. In FIG. 7, the attachment state of the parts of the coulter 4 and the chisel 1 of FIG. 1 is enlarged and illustrated. The chisel 1 is inserted in the bracket 11, and the position of the lower end of the chisel 1 can be adjusted by selecting the adjustment hole 1 a in the upper part of the chisel 1 and inserting it in the bracket 11. The coulter 4 is also provided with an adjusting hole 4a at the supporting rod 4b.
The position of the lower end of the coulter 4 can be adjusted by a.

In FIGS. 4, 5 and 6, the rear cover 3 vibrates up and down violently at the time of high-speed cultivating, which causes a problem that the cultivating depth is not constant. Therefore, the rear cover 3 is rotated during high-speed cultivating. A rear cover lock mechanism for immovably fixing is formed on the lift rod 8 of the rear cover 3. The lift rod 8 is lockable at the rear cover lock body 9. As shown in FIG. 5 and FIG. 6, the rear cover lock body 9 is rotatable up and down, and the rear cover lock body 9 is provided with an engaging groove 9a.
By inserting the engaging groove 8a of the lift rod 8, the lift rod 8 is locked so that it cannot move up and down. FIG. 4 shows an embodiment in which an engaging pin 8b is provided on the lift rod 8 instead of the engaging groove 8a of the lift rod 8. Also in this case, the rear cover lock body 9
It is engaged with this engaging pin 8b by rotating.

8 and 9, claw seats 20 and 33 are provided on the respective surfaces of the hexagonal tilling claw shaft 15, and the claw seats 20 and 33 are, as shown in FIG.
It is slightly eccentric to the left and right, and the claws 34 and 35 are configured to form a Y-shaped claw at their tips.

In FIGS. 10, 11 and 12, claw seats 36 are provided on the three surfaces of the hexagonal tilling claw shaft 15 at 120 degrees, and the Y-shaped claws 16 are planted in the claw seats 36. A configuration is disclosed. The Y-shaped claw 16 is made into a Y-shaped claw 16 by welding two claw plates.

[0022]

Since the present invention is configured as described above, it has the following effects. In the rotary tiller mounted on the tractor according to claim 1, one left and one chisel are arranged on the boundary, which is the outermost side of the tillage width, to prevent the rotary tiller from rising during high-speed tillage, and to prevent the tiller width. Since the cutting of both ends is straight, it is possible to prevent the floating of the rotary tiller that occurs during high-speed tilling, and to further cut both ends of the boundary portion after tilling straight.

According to the second aspect, a coulter is attached to the front part of the chisel, and the coulter cuts the soil in the passage portion of the chisel 1 to reduce the resistance to clods and further to cut the straw. By making a cut in the soil in front of the chisel to reduce the cutting resistance of the chisel and cutting the straw or the like existing in the portion, it is possible to prevent the straw from being caught in the chisel.

According to a third aspect of the present invention, in a rotary tiller mounted on a tractor, a fixing device that prevents the rear cover from rotating when performing high-speed tillage is provided with a lift rod 8.
Since it is configured between the rear cover lock body 9 and the rear cover lock body 9, it is possible to avoid the floating of the rear cover that occurs during high-speed cultivating, and to avoid swaying up and down, and improve the finishing of the soil surface after cultivating. I was able to do it.

According to a fourth aspect of the present invention, in the rotary tiller mounted on the tractor, the same circumferential surface of the tiller shaft is provided.
Since the claw seat is formed so that there are 6 claws, it is possible to reduce the tilling resistance by the tilling claws even when the tractor is traveling at a high speed and the rotary tiller is used at a high speed. As a result, a rotary tiller capable of high-speed tillage could be constructed.

[Brief description of drawings]

FIG. 1 is an overall side view of a rotary tiller of the present invention equipped with a chisel and a coulter.

FIG. 2 is an overall plan view of the rotary tiller of the present invention.

FIG. 3 is a side view of a rotary tiller equipped with a mechanism for locking the rear cover so that the rear cover cannot rotate during high-speed tillage.

FIG. 4 is a perspective view of a lock mechanism of a rear cover.

FIG. 5 is a rear view showing a main part of a rear cover lock mechanism.

FIG. 6 is a side view of the main part of the rear cover lock mechanism.

FIG. 7 is an enlarged side view of a portion of a chisel and a coulter.

FIG. 8 is a side view of the tillage claw shaft 15 when a Y-shape is formed by two claws.

9 is a drawing of the claw having the structure of FIG. 8 seen from the rear surface.

FIG. 10: Cultivating claw shaft 15 on which one Y-shaped claw 16 is arranged
Side view of.

FIG. 11 is a perspective view of a Y-shaped pawl.

FIG. 12 is a rear view of the Y-shaped claw.

[Explanation of symbols]

 1 Chisel 2 Front guide wheel 3 Rear cover 4 Coulter

Claims (4)

[Claims] 1. In a rotary tiller mounted on a tractor, one chisel is arranged on each of the left and right sides on the boundary, which is the outermost side of the tillage width, to prevent the rotary tiller from rising during high-speed tillage, and to prevent the tiller width from increasing. A rotary tiller, characterized in that both ends are cut straight. 2. A chisel according to claim 1, wherein a coulter is attached to the front part of the chisel, and the coulter cuts the soil in the passage part of the chisel 1 to reduce the resistance to clods and further to cut the straw. A rotary tiller that is characterized by that. 3. A rotary tiller mounted on a tractor, characterized in that a fixing device for disabling rotation of a rear cover is provided between a lift rod 8 and a rear cover lock body 9 when high-speed tilling is performed. Rotary tiller. 4. A rotary tiller mounted on a tractor, wherein a pawl seat is formed so that six pawls are present on the same circumferential surface of the tiller pawl shaft.