JPH1028402A - Rear cover for power tiller - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a rear cover for a power tiller capable of sufficient land preparation by tamping the soil while leveling the plowed soil surface with a leveling member. SOLUTION: This rear cover for a power tiller comprises a rotary cover 6 covering a rotary 30 which rotates by power transmission from a running machine body, a rear cover 2 which is fitted to and supported with the rear bottom of the rotary cover, and a leveling member 9 disposed swayably along the bottom edge of the rear cover 2 in such a way that the leveling member 9 can be forced to be directed downward with an aid of a spring.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an improved structure of a rear cover of a tilling device mounted on a tractor or a tilling machine.

[0002]

2. Description of the Related Art Conventionally, as disclosed in Japanese Utility Model Publication No. 8-805, a rotary that is rotationally transmitted from a traveling body is covered with a rotary cover and a rear cover, and a flexible rubber drip is provided on the lower end of the rear cover. 2. Description of the Related Art There is known a tillage device in which a tillage operation is performed while providing a plate and sliding the rubber hanging plate against a tillage surface plowed by a rotary to prevent the tillage from being scattered by the rotary.

[0003]

In the tilling apparatus according to the above publication, the rubber hanging plate provided at the lower end of the rear cover is slid down by its own weight and is slid on the tilling surface.
As shown in FIG. 6, the rubber hanging plate 9 </ b> G merely bends and stretches along the unevenness of the cultivated surface, cannot flatten the unevenness of the cultivated surface, and has the surface crushed soil. There is a problem that the operation is insufficient and good leveling is not performed.

[0004]

SUMMARY OF THE INVENTION To solve the above-mentioned conventional problems, a rear cover of a tilling apparatus according to the present invention covers a rotary that is rotationally transmitted from a traveling machine body with a rotary cover and a rear end portion of the rotary cover. In the tillage device having a rear cover attached to and supported by a rear cover, a leveling member is rotatably provided at a lower end portion of the rear cover, and the leveling member is biased downward via a spring.

[0005] It is characterized in that the middle part of the leveling member is bent in a side view, and the lower end is directed forward.

[0006]

An embodiment of the present invention will be described with reference to the drawings. Reference numeral 1 denotes a tailor-type work machine (running work machine) provided with a rotary tillage device 3 having a rear cover 2 according to the present invention, and the work machine 1 is provided in front of a machine body frame 1a formed also as a transmission case. In addition, the engine 5 is mounted on the vehicle, and the traveling wheel 10 is mounted on the lower part of the middle part, and the rotary 30 is pivotally supported on the rear transmission case 1b. A loop-shaped handle 13 having an operation lever 11 for controlling operation, a clutch lever 12, and the like is extended rearward.

In the tilling device 3, the rotary cover 6 is fixed to a transmission case 1b in which the middle of the rotary 30 is pivotally supported, and covers the upper side and the side along the rotation locus of the tilling claw 31 of the rotary 30. At the same time, the rear part of the rotary 30 is covered with the rear cover 2 attached to the rear end edge of the rotary cover 6 via a hinge 61 having a hinge shape. Reference numeral 62 denotes a side cover that covers the side surface of the rotary 30. The side cover 62 is mounted on both sides of the rotary cover 6 so that the lower height and the angle can be adjusted. In the center of the rear of the rotary cover 6, a tillage control mechanism 7 including a resistance rod 71 and a tillage depth adjustment rod 72 that can be operated to adjust the height is installed by a configuration similar to a conventional one. I have.

Next, the structure of the rear cover 2 according to the present invention will be described with reference to FIGS. The rear cover 2
A leveling member 9 is attached to the lower edge of the lower surface so as to be urged downward and rotatable so that the plowed surface plowed by the rotary 30 can be satisfactorily leveled. Also,
The rear cover 2 can be fixed to the rotary cover 6 at the upper evacuation rotation position as required with the rotary cover 6 via the hinge 61 as in the conventional case.

The leveling member 9 is rotatably mounted by connecting a hinge portion having the same width as that of the rear cover 2 and formed at a joint portion between the two in a hinge shape with a mounting shaft 20.
A coil-shaped spring 90 having bifurcated ends 9a, 9a is fitted on both sides of the rear cover 2 so that each end 9a is provided so as to be able to contact the leveling member 9 and the rear cover 2, respectively. And a downward biasing force that rotates upward against the spring 90 when the leveling member 9 is pushed from below on the plowing surface. It is provided so as to be capable of downward biasing rotation so as to be in a leveling posture.

In addition, the leveling member 9 is formed such that a middle part is bent in a letter shape or a curved shape in a side view so that a lower end part is directed forward, and the lower end part is sharpened in a plan view. The leveling end 91 is formed, and the shape of the leveling end 91 and the downward biasing force of the spring 90 are used to scrape the soil mass or the like on the cultivated surface while scooping up the soil. The soil resistance is properly released by the parts, the cultivated surface of the entire width of the tilling is satisfactorily leveled, and the lower end of the leveling member 9 is always in contact with the cultivated surface, so that the rear cover 2 can accurately scatter the rearward of the cultivated soil. So that it can be prevented.

The tilling operation performed by the tilling apparatus 3 having the above-described structure is performed favorably while the scattered soil plowed by the rotation of the rotary 30 is prevented from being scattered outside by the rotary cover 6 and the rear cover 2. is there. At this time, the leveling member 9 advances while sliding the inner surface of the lower end portion along the unevenness of the plowing surface, and as shown in FIG. Is what you can do. That is, as shown in FIG.
While having rigidity itself, when it comes in contact with a high cultivated surface (mountain), it rotates upward around the mounting shaft 20 against the spring 90 along the lower surface. Suppressed while crushing soil in contact with the plowed surface with the biasing force,
The leveling end 91 which is bent and directed forward is moved downward by the downward biasing force of the spring 90 along with the advance of the fuselage so as to scrape off the soil at the hill portion to fill the low soil surface (valley portion). It works like a terrain.

As a result, as shown in FIG. 1B, the peak is scraped off from the dotted state as shown by the solid line, and the leveling member 9 is removed.
By turning downward at the valley, the valley can be leveled with the scraped soil of the mountain as shown by the solid line, so that the cultivated surface is evenly leveled as a whole. is there. Therefore, there is an advantage that a high leveling performance can be obtained without being influenced by the difference in soil quality, the hardness or the cultivation depth of each field. Although the leveling member 9 is formed of a flat plate-like member, the present invention is not limited to this. For example, it may be formed by implanting a large number of linear leveling rods on the mounting shaft 20 in a comb shape. Good. Also, the end 9 of the spring 90
a and 9a may be fixed to the rear cover 2 and the leveling member 9, respectively.

As shown in FIGS. 7 and 8, the rear cover 2 is provided with a refraction adjusting mechanism 21 in the middle thereof and is divided into a fixed cover 2a and a movable cover 2b.
May be configured such that refraction can be adjusted. That is, in this case, the movable cover 2b is connected to the lower end of the fixed cover 2a via the hinge portion 22 so as to be vertically rotatable.
Is the adjusting rod 23 fixed to the fixed cover 2a and the movable cover 2
The movable cover 2b is connected to an adjusting rod 25 fixed to the movable cover 2b by an adjusting pin 26 so as to adjust the position.
Are supported so that the mounting angle can be adjusted in the front-rear direction as shown by dotted lines A and B, so that the height of the leveling member 9 and the scooping angle can be changed. Accordingly, when the shallow tillage is performed by the tillage device 3, the leveling member 9 is adjusted in the direction of the dotted line A, and when the deep tillage is performed, the leveling member 9 is adjusted in the direction of the dotted line B to correspond to the tillage depth. It has features such as good scraping.

[0014]

The present invention configured as described above has the following effects. According to the invention of claim 1,
At the lower end of the rear cover that is extended to the rotary cover, the leveling member urged downward by a spring suppresses the cultivated surface while flattening the cultivated surface. Tilling work, such as leveling, can be performed with high performance.

According to the second aspect of the present invention, the leveling member is bent forward as the fuselage advances, and the leveling end directed forward is moved forward with a downward biasing force so as to scrape the soil at the mountain portion. Since it can act so as to fill the valleys, the unevenness of the plowed surface can be uniformly scraped as a whole, and good leveling can be performed.

[Brief description of the drawings]

FIG. 1 is a side view of a traveling work machine provided with a rear cover according to the present invention.

FIG. 2 is a plan view of FIG. 1;

FIG. 3 is a side view of the tillage device.

FIG. 4 is a rear view of FIG. 3;

FIG. 5 (A) is a side view showing a leveling operation of a peak of a plowed surface by a leveling member. (B) is a side view which shows the leveling operation | work of the valley part of the plowing surface by a leveling member.

FIG. 6 is a side view showing a leveling operation using a conventional rear cover.

FIG. 7 is a side view of a tilling apparatus including a rear cover according to another embodiment.

FIG. 8 is a rear view of FIG. 7;

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Working machine (traveling working machine) 2 Rear cover 3 Tilling device 6 Rotary cover 9 Leveling member 20 Mounting shaft 30 Rotary 90 Spring

Claims (2)

[Claims] 1. A tilling apparatus comprising: a rotary cover which is rotatably transmitted from a traveling machine body and which is covered with a rotary cover; and a rear cover attached to and supported by a rear end of the rotary cover. A rear cover for a tilling device, wherein the rear cover is movably provided and biases the leveling member downward via a spring. 2. The rear cover of the tilling apparatus according to claim 1, wherein a middle part of the leveling member is bent in a side view, and a lower end is directed forward.