JPH044801A - Rotary tiller - Google Patents

Abstract

PURPOSE:To obtain the subject machine capable of soil-gathering work by rotatably pivoting a rear cover at a rear end of a tilling cover having tilling claws, hooking a cover-pressing hanger rod in remote control, installing a locking device and making the tilling cover possible to rotate in back and forth. CONSTITUTION:In a rotary tiller attached to a tractor, three covers composed of a tilling cover 4, a rear cover 5 and a smoothing plate 25 are successively installed around rotated locus of tilling claws 9 and the tilling cover 4 is made to rotate in back and forth to a shaft 31 of the tilling claws by rotation of a screw shaft 28 with rotation of a deep-and shallow rotating motor 8, then the rear cover 5 is rotatably pivoted on a pivoting shaft 10 at a rear end of said rotating tilling cover 4, thus a hanger rod 6 pressing the tilling cover 4 is hooked by an operation of a remote control lever 1 and a locking device 2 is installed at a side of the tilling cover 4, then rotation of the rear cover 5 is inhibited to make possible to perform soil-gathering work.

Description

DETAILED DESCRIPTION OF THE INVENTION (a) Field of Industrial Application The present invention relates to a technique for fixing the rotation of the rear cover of a low-critcher tiller attached to a tractor to enable soil mulching work.

(b) Prior Art It has been known that a leveler is placed at the rear of a rotary tillage device in order to perform soil levitation work.

For example, there is a technique described in Japanese Unexamined Patent Publication No. 60-98904.

However, in this conventional technique, the rear cover or rear cover of the rotary tiller was not used to perform the soil levying work (a separately supported leveler was provided).

(C) Problems to be Solved by the Invention The present invention is a device that fixes the rear cover portion so that it cannot rotate without making any major changes to the parts of a conventional rotary tiller, thereby making it possible to carry out soil mulching work. It is.

For this purpose, a locking mechanism is provided to stop the movement of the hanger rod that urges the upward rotation of the rear cover, and prevents the hanger rod from moving upward, allowing the lower end of the rear cover to be used for earth raising work. This is what we do.

In addition, if the rear cover is simply locked to prevent rotation, the lower end of the rear cover cannot be projected to a lower position than the lower end position of the tilling claw. By making the cover itself rotatable back and forth, the protruding width of the rear cover 5 can be increased to the extent that the earth-harvesting work can be carried out completely.
This is the amount of protrusion obtained.

(d) Means for Solving the Problems The problems to be solved by the present invention are as described above. Next, the means for solving the problems will be explained.

A rear cover 5 is provided at the rear end of the tilling cover 4 equipped with tilling claws 9.
A hanger rod 6 which is rotatably supported and presses the tilling cover 4 is locked by operating the remote control lever 1,
The rear cover 50 can be prevented from rotating, and a locking device is disposed on the side of the tilling cover 4, so that the tilling cover 4 can be prevented from rotating by the tilling claw shaft 31.
It can be rotated back and forth.

(e) Examples The problems to be solved by the present invention and the means for solving them are as described above (
Next, the configuration of the embodiment shown in the attached drawings will be explained.

Fig. 1 is an overall side view of the rotary tilling device of the present invention;
The figure is an enlarged side view showing the locking mechanism of the hanger rod 6.
FIG. 3 is a side view in an unlocked state, and FIG. 4 is a rear view.

The overall configuration will be explained with reference to FIG.

Power is transmitted from the PTO shaft at the rear of the tractor to the input shaft 32 of the gearbox 29 of the rotary tiller. The direction of rotation is changed within the gearbox 29, and power is transmitted to the tilling case 30 by the main beam, which rotates the tilling claw shaft 31 on which the tilling claws 9 are installed.

Three covers, a tilling cover 4, a rear cover 5, and a leveling plate 25, are arranged in series around the rotation locus of the tilling claws 9.

The tillage cover 4 is rotated by the screw shaft 2 by the rotation of the shallow rotation motor 8.
8 rotates and can be rotated back and forth as shown by the arrow.

A rear cover 5 is pivotally supported on a pivot shaft 10 at the rear end of the tilling cover 4 that rotates back and forth, and a leveling plate 25 is also pivotally supported on a pivot shaft 20 at the rear end of the rear cover 5. .

A sensor bracket 17 is fixedly protruded from the upper surface of the rear end of the tilling cover 4, and a rotating cover sensor 27 and a tilling depth sensor 26 are fixedly attached to the sensor bracket 17. The angle at which the tilling cover 4 rotates back and forth due to the drive of the moving motor 8 is measured by the arm 2.
Detected by 7a. Further, the tilling depth sensor 26 detects the rotation angle of the leveling plate 25 with respect to the tilling cover 4, and is a sensor for automatically controlling the tilling depth by raising and lowering the hydraulic lifting device of the tractor.

An arm 39 fixed to the leveling plate 25 and an arm 26a of the plowing depth sensor 26 are connected by a link, and an arm 27a of the rotary cover sensor 27 is connected to the gear box 29.
Since the gearbox is fixed, when the tilling cover 4 rotates, the rotating cover sensor 27 rotates and is configured to display the rotation width of the tilling cover 4. are doing.

The slide pipe 15 of the hanger rod 6 is pivotally supported on the protruding upper part of the sensor bracket 17 by a pivot shaft 35. The pivot shaft 35 is fixed inside the slide pipe 15, and the part of the pivot shaft 35, which is a round shaft, allows the part of the slide pipe 15, which is a square pipe, to rotate.

Since the slide pipe 15 is configured as a square pipe,
The upper end of the biasing spring 12 can be contacted from below.

In addition, a spacer 21 is inserted into the portion where the hanger rod 6 protrudes from the slide pipe 15 through resin pressure 19 and 22.
is interposed.

The locking pine needle pin 37 at the tip of the hanger rod 6 comes into contact with the spacer 21, so that the hanger rod 6 is no longer pulled out and falls, and the rear cover 5 and the leveling plate 25 are prevented from hanging down. ing.

The slide prevention mechanism of the hanger rod 6 of the present invention is constituted by a locking fitting 2 which is also pivotally supported by the pivot shaft 35. The lock fitting 2 is configured in a U-shape, and by rotating and fixing this portion to the upper part of the hanger rod 6, the hanger rod 6 is prevented from sliding upward any further. be.

The lock fitting 2 needs to be released at all times, and the urging spring 3 is interposed between the spring receiver arm 14 and the spring receiver on the upper surface of the rear cover 5 and the locking piece 36.

Then, by rotating the remote control lever 1 and pulling the wire 7 against the biasing force of the biasing spring 3, the connector 1
The lock fitting 2 rotates via the lock fitting 6, and the U-shaped portion of the lock fitting 2 covers the upper part of the hanger rod 6, thereby preventing the hanger rod 6 from sliding upward.

A slide pipe 15 is pivotally supported at the rear of the tilling cover 4, and a leveling plate 25 is pivotally supported at the rear of the slide pipe 15 via a pivot shaft 20. It rotates around the pivot shaft 20.

However, in order to prevent the leveling plate 25 from rotating significantly, the connecting arm 23 is protruded from the bracket 24, and the upper end of the connecting arm 23 is fixed to the slide tube 38, and the hanger is inserted into the fitting hole of the slide tube 38. The rod 6 is slidably inserted therethrough.

``The upper and lower sides of the slide tube 38 are brought into contact with the biasing springs 12 and 13 that are loosely fitted around the outer periphery of the hanger rod 6, so that the leveling plate 25 is pushed against the slide tube 38 by the bias springs 12 and 13. Its position is regulated, and the structure is such that it cannot move much further than that.

However, if an obstacle catches on the leveling plate 25 and pushes up the leveling plate 25 and the rear cover 5 while the lifting work of the hanger rod 6 is locked with the lock fitting 2, It broke at the pivot shaft 20,
The connecting arm 23 pushes up the slide cylinder 38, and the biasing springs 12 and 13 are bent.

This deflection of the biasing springs 12 and 13 can alleviate the pressing force caused by the obstacle.

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

First, a rear cover 5 is rotatably supported on the rear end of a tilling cover 4 equipped with tilling claws 9, and a hanger rod 6 that presses the tilling cover 4 is locked by operating a remote control lever 1. Since it is possible to prevent the rear cover 5 from rotating, the locking mechanism can be configured by simply adding the lock fitting 2, wire 7, remote control lever 1, etc., without making any major changes to the conventional rotary tiller. This made it possible to perform soil mulching work using rotary tillage equipment.

Second, when the upward slide of the hanger rod 6 is locked by the locking fitting 2, if a large impact force is applied to the rear cover or the leveling plate part during earth-filling work, the area around the hanger rod should be Biasing spring 12.1 placed
3 was able to absorb this.

Thirdly, the locking device is disposed on the side of the tilling cover 4, and the tilling cover 4 can be rotated back and forth with respect to the tilling claw shaft 31, so that the height of the finished soil surface can be adjusted during the mulching work. When doing this, there is no need to adjust the rotary tiller by moving it up and down by using the tillage depth control device of the rotary tiller using the hydraulic control device of the tractor. By simply rotating the tillage cover 4 back and forth using 8, it is possible to adjust the finishing position of the mulching work.

Fourthly, the tilling cover 4 and the rear cover 5 are rotated significantly backward by the shallow rotation motor 8, and the rear cover 5 is rotated by the tilling claw 9.
If the locking fitting 2 is used to lock the rear cover 5 and the leveling plate 25 in a state where they are pulled toward the side, the lower ends of the rear cover 5 and the leveling plate 25 can protrude more than the lower end position of the tilling claws 9, making it easier to carry out the soil gathering work. It has become.

[Brief explanation of the drawing]

Fig. 1 is an overall side view of the rotary tiller of the present invention;
The figure is an enlarged side view showing the locking mechanism of the hanger rod 6.
FIG. 3 is a side view in an unlocked state, and FIG. 4 is a rear view. 1...Remote control lever, lock fitting, tilling cover, rear cover, hanger rod, tilling claw 13...biasing spring 20...pivot shaft...leveling plate applicant Yanmar Diesel Co., Ltd. agent Patent Attorney Hisashi Yano

Claims (1)

[Claims] The rear cover is rotatably supported at the rear end of the tilling cover equipped with tilling claws, and the hanger rod that presses the tilling cover can be locked by operating a remote control lever to prevent rotation of the rear cover. A rotary tiller, characterized in that a lock device is disposed on the side of a tiller cover, and the tiller cover is rotatable back and forth with respect to a tiller claw shaft.