JPS61231902A - Reversibly rotatable rotary plowing apparatus - 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] (a) Industrial Application Field The present invention relates to a rotary tillage device that is attached to the rear of an agricultural tractor and performs rough evacuation, fine soil, and plowing of a field.
This invention relates to a forward/reverse rotary tilling device that allows the rotation direction of tilling claws to be rotated forward or backward, thereby enabling both up-cut tilling and down-cut tilling.

(b) Prior Art The forward/reverse rotary tiller itself has been known for a long time. For example, Japanese Patent Application Laid-Open No. 59-71605, Japanese Utility Model Application No. 58-170905, Japanese Utility Model Application No. 58-189
Publication No. 704, etc.

Conventionally, it has become clear that the gap between the tilling cover and the tips of the tilling claws is an important factor when performing forward tilling and reverse tilling in one rotary tilling device. However, with conventional forward/reverse rotation rotary tillers, the gap between the tilling cover and the tiller claws cannot be changed from the gap set from the beginning, and even if forward rotation and reverse rotation tillage are possible, the tillage performance is reduced accordingly. had been sacrificed. In particular, the gap on the side where the tilling claws enter into the tilling cover should be narrowed to prevent soil from being brought in, and the side on which the tilling claws exit should be made to lose the resistance of the soil being carried (increasing the gap will improve tillage performance. This will lead to improvements in performance.

Therefore, if the gap is set to be favorable for either one, the problem will occur that the required horsepower will be large in the case of reverse rotation.If the gap is the same for both, the performance will be lower in both forward and reverse rotation. It will be a sacrifice.

(C) Problems to be Solved by the Invention In the present invention, the arrangement of the tilling cover, which was previously impossible, can be changed when switching between forward and reverse rotation, so that the tiller claws can be adjusted in both forward and reverse rotation. The purpose is to optimize the gap between the tips of the tilling claws and the tilling cover. This minimizes the horsepower required for both forward and reverse rotation.

In addition, in conjunction with changing the arrangement of the tilling cover, the rake installed on the tilling cover or rear cover can be replaced, which prevents the movement of clods when the rake rotates forward or reverse, increasing the required horsepower and improving the soil crushing effect. This was designed to prevent this from leading to a decrease in

(d) Means for Solving the Problems The objects of the present invention are as described above. Next, the structure for achieving the objects will be explained.

In a rotary tiller that allows the direction of rotation of the tilling claw to be forward or reverse, in addition to changing the direction of rotation of the tilling claw, the position of the tilling cover is changed to change the distance between the front/rear of the tilling cover and the tip of the tilling claw. This is the structure that was designed to do so.

Further, a rear cover is pivotally supported at the rear end of the tilling cover so as to be movable up and down, and a rake fixed to the inner surface of the rear cover can be adjusted in angle in forward and reverse directions.

(E) Embodiment The structure of the present invention is as described above. Next, the structure of the embodiment will be explained with reference to the attached drawings.

Fig. 1 is a plan view of the forward/reverse rotation rotary cultivating device of the present invention, Fig. 2 is a partial side view of the same during normal rotation, Fig. 3 is a partial side view of the same during reverse rotation, and Fig. 4 is a partial side view of the same when the rotation is reversed. The figure is a partial side view showing the position of the rake during normal rotation raking work, FIG. 5 is a perspective view of the tilling cover and rear cover, and FIG. 6 is a side view of the hanger stay 5.

The overall configuration will be explained with reference to FIGS. 1 to 4.

A rotary gearbox 24 is arranged in the center, through which power is transmitted from the PTO shaft of the agricultural tractor to the input shaft 25 via a universal joint. Then, the main beams 18L and 18R are projected from the rotary gear box 24 to the left and right sides, and the left main beam 1
A power transmission shaft is disposed within 8L and transmits power into the transmission case 11. A tilling claw shaft is installed between the transmission case 11 and the right side support plate 28, and the tilling claws 6 are implanted in the tilling claw shaft. In this example, an example was shown in which a normal hatchet claw is used and the direction is changed during forward and reverse rotation, but as a claw that can be used for both forward and reverse rotation,
It is also possible that the direction does not need to be changed.

The tilling cover 1, which is the essential part of the present invention, is integrated with the left and right side covers 2L and 2R, and has pivot shafts 19L to 19R that protrude from the transmission case 11 and inward from the side support plate 28. It is pivoted near the center in the front-rear direction.

Then, move the link 1 upward from the rear end of the tilling cover 1.
By protruding the link 2 and fixing the position of the link with the hanger stay 5, the tilling cover 1 and the side cover 2L.
It is positioning the integrated 2R.

The hanger stays 5 are provided on the left and right, and the lower link pin brackets 17 are fixed on the left and right main beams.
It is fixed to L/17H with a pivot shaft 21 and a pin 20. The insertion hole position of the pin 20 is as shown in FIG.
There are two openings, 5b and 5c, above and below, where 5b is a forward rotary rotary and 5c is a reverse rotary. 5a is an insertion hole for the pivot shaft 21.

Further, a hanger rod 8 of the front rear cover 3 is biased by a spring at the rear end of the hanger stay 5, and is supported by a pin 23 so as to be slidable up and down.

Further, a hanger rod 14 of the rear rear cover 4 is supported by a stay 22 on the front rear cover 3 so as to be slidable up and down with a spring bias.

The front rear cover 3 is pivotally supported to the rear end of the tiller cover by a pivot shaft 15, and the rear rear cover 4 is pivotally supported to the rear end of the front rear cover 3 by a pivot shaft 16. 9 is a depth frame, 10 is a top link mast, and 13 is a depth handle.

In addition, a rake 7 is protruded from the inner surface of the front rear cover 3, and as shown in Fig. 3, the rake 7 is carried around by the tilling claws from above in the case of a reversing rotary, crushes the soil, and classifies the falling soil. This is useful for placing large lumps at the bottom, then weeds and other debris that cannot pass through the rake 7, and finally the fine soil from which the rake 7 has been removed, in a layered manner. In the case of a rotary, clods of soil and weeds raked up from below were obstructed by the rake 7, which had a negative effect on the rotation of the tiller claws, but in the present invention, the rake 7 is attached to the bottom surface of the front rear cover 3. Therefore, by changing the arrangement of the tilling cover 1 for forward and reverse rotation, the angle of the rake 7 will also become rearward as shown in Figure 2, and the slope will become gentler, so that it will no longer have a negative effect on the forward rotation of the tilling claws. be. It also performs a classification action on excavated soil clods.

Furthermore, as shown in Figure 2, even if the rake 7 does not get in the way when the rotary rotates in the forward direction, the clod will return to its original state when plowing the paddy fields, so the rake 7 has no role to play, and is only used to catch debris. Since the rake 7 can only be used to collect debris, the rake 7 is attached to the back side of the rear cover 4, as shown in FIG. 4, to serve as a leveling rake that suppresses the debris into the mud.

As shown in FIG. 5, the rake 7 is composed of a large number of comb-shaped rods, and the comb teeth classify the soil clods.

(f) Functions Since the present invention is constructed as described above, it performs the following functions.

First, as shown in FIG. 2, in the case of a forward-rotating down-cut rotary, the tilling claws rotate counterclockwise in FIG. 2 and carry the soil toward the rear of the tilling cover 1. If this is inserted between the tilling claw 6 and the tilling cover 1, rotational resistance will increase, so the gap a2 between the rear tilling cover 1 corresponding to the entrance side and the outer circumference of the rotation locus of the tilling claw 6 should be made smaller than the front gap b2. It is also made smaller.

This switching is done through the insertion hole 5b of the pin 20 of the hanger stay 5.
This is done by inserting it into 5b of 5c. The integrated cultivation cover 1 and side cover 2 have left and right pivot shafts 19L and 191? It rotates around the center.

In the case of the reversing rotary shown in Fig. 3, the tilling claws 6 rotating clockwise from the front move the soil clods around, so the front gap b
1 is configured to be smaller than the rear gap a1.

In this case, a pin 20 is inserted into the insertion hole 5c of the hanger stay 5.
By inserting the link 12, the arrangement of the tilling cover 1 can be changed.

In addition, in the case of a reversing rotary, as shown in Figure 3, the rake 7
It is necessary to place the rake 7 near the rotary trajectory of the tiller claws for sorting work, but in the case of a normal rotation rotary as shown in Figure 2, this rake 7 gets in the way, so the hanger rod 7 is shortened and the front The angle of the rear cover 3 is changed, thereby changing the mounting angle position of the rake 7. In this embodiment, the rear cover is divided into a front rear cover 3 and a rear rear cover 4, which can be bent by a pivot shaft 16, so that the rake angle can be changed. As another embodiment, the rear cover may be a single piece, or the angle of the mounting base of the rake 7 may be changed.

(E) Effects of the Invention Since the present invention is constructed as described above, it has the following effects.

First, in the past, the arrangement of the tilling cover was the same when switching between forward and reverse rotation, so soil was carried around by the tilling claws, and the soil clods that got under the tilling cover were forced into narrow gaps as the tilling claws rotated. However, with the structure of the present invention, the inlet side is narrow in both forward and reverse rotations. The exit side could be made wider, minimizing rotational resistance.

Secondly, the rake, which is required for a reverse rotation rotary, can be placed at a gentle slope backwards by changing the inclination angle for a forward rotation rotary, which eliminates the possibility of clogging with clods during forward rotation. can be prevented. Also, if the rake is placed close to the rear cover during plowing work, there is a risk that the rear cover will get close and interfere with the tilling claws, so if you change the attachment and attach it to the rear rear cover in the opposite direction, it can be used as a leveling/grading rake. can also be used.

[Brief explanation of the drawing]

Fig. 2 is a plan view of the forward/reverse rotary tilling device of the present invention, Fig. 2 is a partial side view when rotating in the normal direction, Fig. 3 is a partially partial side view when the rotation is in reverse, and Fig. 4 The figure is a partial side view showing the position of the rake during normal rotation raking work, FIG. 5 is a perspective view of the tilling cover and rear cover, and FIG. 6 is a side view of the hanger stay 5. 1... Tillage cover 2... Side cover 3.
...Front rear cover 4...Rear rear cover 5...
・Hanger stay 6...Tilling claw 7...Rake

Claims (2)

[Claims] (1) In a rotary tiller in which the direction of rotation of the tilling claws can be forward or reverse, the position of the tilling cover can be changed at the same time as changing the direction of rotation of the tilling claws, and the front/rear of the tilling cover and the tip of the tilling claws can be changed. A forward/reverse rotary tilling device characterized by being configured to change the interval. (2) A rear cover is pivotally supported on the rear end of the tilling cover as described in claim 1 so as to be movable up and down, and a rake fixed to the inner surface of the rear cover can be adjusted in angle according to forward and reverse directions. Features a forward/reverse rotary tiller.