JP3201683B2 - Rear cover liner for rotary tillage - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a rear cover lining fixing device for a rotary tiller.

[0002]

2. Description of the Related Art In order to prevent the adhesion of mud when tilling, a rubber plate is stuck on the inner surface of a rear cover of a rotary tilling tool, and the mud is shaken down by elastic deformation of rubber.
As disclosed in JP-A-04801 and JP-A-4-335801, the concept is conventionally known.

[0003]

In such a known device, a rubber plate is provided with a mounting hole through which a fastener such as a bolt, a screw or a pin is passed, and the rubber plate is bolted to a flat mounting surface. It was attached in a substantially planar state via a stopper such as a pin or a pin and a washer. When the rubber plate attached in a flat state, the scattered mud plowed and tilled against the rubber plate vibrates and the rubber plate vibrates, the mounting holes opened in the rubber plate are extended, and the rubber plate is easily detached from the stopper. A large washer was needed to prevent this.

Further, in the conventional one, since the washer projects from the rubber plate surface to the mud attaching side, the mud adheres easily with the washer as a nucleus, and when the number of stoppers is increased, the inner surface of the rear cover is reduced. Adhered mud increased, and it was difficult to clean the inside of the rear cover. In addition, when cleaning by dropping by hand, a spatula or scythe for dropping hits the washer protruding from the rubber plate surface to the side where mud is adhered, disturbing work or damaging the wrist Was occurring.

[0005]

SUMMARY OF THE INVENTION The present invention is to solve such a problem of the conventional device, and has taken the following technical means. That is, in the rubber plate 3 attached to the inner surface of the rear cover 1 by appropriately attaching the spacing position with the stopper 2, the spacer 5 having the truncated conical concave slope 4 between the rear cover 1 and the rubber plate 3 is inserted. The rubber plate 3 is provided on the outside of the plate 3 with the stopper 2 via the pusher 6.
Of the rotary tilling rear cover lining fixing device, characterized in that a part of the rotary tilling is pushed into the concave slope 4 of the spacer 5 and fixed.

[0006]

1 shows a rotary tilling tool 7 which is mounted on an end of a farm tractor so as to be able to move up and down to perform a tilling operation. The present invention is folded into a rear cover 1 of the rotary tilling tool 7. Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. However, the dimensions, materials, shapes, relative arrangements, and the like of the components described in this embodiment are not intended to limit the scope of the present invention only to them unless otherwise specified. , Are merely illustrative examples.

The driving force from the PTO shaft of the agricultural tractor passes through the input shaft 8 on the upper part of the transmission case 9 and the tilling shaft 1 on the lower part.
Reaches 0. The tilling shaft 10 has a plurality of tilling claws 11, 1
1. . . . Is mounted, and the cultivation shaft 10 is rotating in the direction of the arrow “a”. A main cover 12 is disposed above the tilling claw 11 that rotates along a fixed locus at a predetermined distance from the tilling claw 11, and the rear cover 1 is vertically swingable about an axis 13 behind the main cover 12. 14 is an equalizing pressure adjusting means,
The swing range and pressing force of the rear cover 1 are adjusted via the rod whose spring position has been adjusted.

On the inner surface of the main cover 12 made of a thin iron plate, a resin plate 15 is substantially in close contact with the mounting surface plate 16.
The drilling mud which is attached with a substantially constant gap (about 5 to 6 cm) from the rotation locus of 1 and rotates during tilling flows along the surface of the resin plate 15 which is in the tangential direction. The resin plate 15 is made of a polymer material, and has a higher releasability than an iron plate with respect to the adhesion of mud and exhibits stable performance because there is no rust.

The rear cover 1 behind the main cover 12 is also made of a thin iron plate. An elastic body made of a rubber plate 3 is attached to the inner surface of the rear cover 1 with a gap of 2 to 3 cm from the iron plate surface. I have. As shown in the overall side view of FIG. 4, the rear cover 1 swings up and down about the shaft 13 in the direction of the arrow “B” or the counter-arrow “B”. This means that the tilling scattered mud directly excavated by the tilling claw 11 rotating in the direction of the arrow "a" is scattered in the direction of the arrow "c", so that the scattered mud scattered by the directly excavation hits the surface of the rear cover 1 at right angles.

As shown in FIGS. 1 and 2, a rubber plate 3 is located on the inner side of the rear cover 1 with a spacer 5 interposed therebetween.
Further, the pusher 6 and the stopper 2 are located on the mud contact side,
Nut-like female screw 17 welded to the outer surface of the rear cover 1
Then, a stopper 2 such as a bolt or a screw is screwed in, and the rubber plate 3 is fixed to the rear cover 1 with a gap (about 1 to 2 cm).

Reference numeral 18 denotes a stopper, which is a pipe-like member having a fixed length, which adjusts the clamping pressure of the rubber plate 3 when the stopper 2 is tightened to prevent breakage. On the side of the spacer 5 that comes into contact with the rubber plate 3, a truncated cone-shaped concave slope 4 is provided, and when the stopper 2 is tightened, the rubber plate 3 around the opening 19 is pressed by the washer-like pressing tool 6. The rubber plate 3 around the opening 19 is pulled into the slope 4 and fixed in a stretched state.

In the illustrated example, the pressing member 6 is provided as a single item and the flange portion 20 similar to the concave slope 4 is provided. However, even if the pressing member 6 is pressed with a simple flat washer, the effect is substantially the same. It may be a bolt with flange integrated with the bolt. Rear cover 1
The shape seen from the direction of the rear perspective T of FIG. 4 will be described with reference to FIG.
The overall shape of the rear cover 1 includes short left and right side edges 22,
22 and a rectangular shape having a substantially linear long front edge 23 having an engaging portion 21 for attaching the shaft 13 provided on the main cover 12 and a pressure-reducing surface 24 at the rear edge.

Side cutouts 25, 25 for attaching a working machine are provided at the left and right ends and the center of the trailing edge compression surface 24.
And a center notch 26, and when not in use, the side covers 27, 27 and the center cover 28 are attached to close the notches. The rear cover 1 is substantially parallel to the front edge 23,
Intervals A, B, C and three internal thread rows 17a, 17
a. . . , 17b, 17b. . . , 17c, 17
c,. . . Is provided.

There are eight female screws 17a in the row A in the width direction,
The number of female screws 17b in the row B is four in the width direction, and the number of female screws 17c in the row C is six in the width direction. The female screw 17a in row A is
The second female screw 17b, 17 is covered with a front reinforcing frame 29 having an angled cross section that covers the entire left-right direction, and is outside the rows B and C.
c is designed so that the upper surface is covered with the side reinforcing frames 30 in the front-rear direction so as not to impair the aesthetic appearance.

In the inner surface of the rear cover 1, mounting openings 19, 1 are provided at positions corresponding to the female threads 17 of the rear cover 1.
9. . . . , Facing the rectangular rubber plate 3 having the stoppers 2, 2,. . Compressor surface 2 of rear cover 1
Attach it avoiding 4 parts. The rubber plate 3 is a flat plate before being attached, and is tightened with the stopper 2 to secure the rear cover 1.
By attaching with a gap to the excavated mud, the mud is prevented from adhering due to the collision of the excavated mud in the direction of arrow "c" by vibration. Polymerized to cover the trailing edge.

FIGS. 5 and 6 show another embodiment of a mounting tool such as a bolt or a screw for mounting the rubber plate 3a to the rear cover 1. FIG. A resin member 33 integrally covers the outer periphery of the attachment 32 such as a bolt or a screw on the head side, and a groove 34 for inserting a tool and a flange 35 for pressing rubber are provided in the resin member 33 around the head.
Is provided. The concave groove 34 in the illustrated example has a hexagonal shape for inserting a tool box.
Anything, such as a groove or a + groove, is acceptable.

A seat 3 is provided between the rear cover 1 and the rubber plate 3a.
6 to stabilize the mounting state of the mounting holes 37 of the rubber plate 3a. As described above, when the mud contact side of the fixture 32 made of a metal material such as a bolt or a screw is covered with the resin agent, corrosion by acid or alkali such as fertilizer or disinfectant contained in the mud in the field can be prevented, The fixture 32 can be used for a long time.

FIG. 7 shows a fastening tool 38 of another example when covered with a resin material, and shows a mounting hole 37a of a rubber plate 3a.
The fixing of the surroundings is performed by a pair of receiving collars 41 having a pair of pressing flanges 39 of the fastener 38 and inclined recesses 40 having a truncated conical slope.
It consists of. Then, in order to maintain the strength of the pressing flange portion 39, the core metal plate 42 is integrally extended from a bolt or the like that is the main body of the fastener 38.

[0019]

According to the present invention, as described above,
Since the rubber plate 3 in the vicinity of the stopper 2 is strongly pushed into the concave slope 4 of the spacer 5 by the stopper 2 and the pressing member 6, the opening 19 is formed.
Of the rubber plate 3 is less likely to come off the stopper 2. For this reason, the outer shape of the pusher 6 can be reduced, and it is difficult for the pusher 6 to become a nucleus when mud adheres, and the number of times of cleaning is reduced.

Further, since the rubber plate 3 is attached to the concave slope 4 of the plurality of spacers 5, the rubber plate 3 is pulled by a plurality of portions, so that the entire rubber plate 3 can be provided with tension. Vibration is easily continued, and detachment of the attached mud is promoted. Further, since the rubber plate 3 is recessed on the side of the concave slope 4 of the spacer 5 at the time of mounting, the pusher 6 and the stopper 2 are moved in the sinking direction. Efficiency is improved due to less contact with sickles and the like. In addition, since the surface protrusion is reduced, the soil flow is not hindered, so that the effect of preventing the adhesion of mud is improved, the damage and wear of the members are reduced, and the durability is improved.

[Brief description of the drawings]

FIG. 1 is a side view of a main part, partly in section.

FIG. 2 is an enlarged sectional view of a main part.

FIG. 3 is a rear perspective view of a main part.

FIG. 4 is an overall side view.

FIG. 5 is a side sectional view showing a second embodiment of a main part.

FIG. 6 is a front view of FIG. 5;

FIG. 7 is a side sectional view showing a third embodiment of a main part.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Rear cover 2 Stopper 3 Rubber plate 4 Concave slope 5 Spacer 6 Pusher

──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor Toshio Takechi 660-3 Takubo, Shigenobu-cho, Onsen-gun, Ehime Pref. Inside the Shigenobu Plant of Yamamoto Manufacturing Co., Ltd. formula company Yamamoto Seisakusho Shigenobu factory examiner Hidehiko Nishida (56) reference Patent flat 4-304801 (JP, a) JP flat 4-335801 (JP, a) (58 ) investigated the field (Int.Cl. ⁷ , DB name) A01B 33/12

Claims (1)

(57) [Claims] 1. A rubber plate 3 attached to an inner surface of a rear cover 1 at an appropriate interval with a stopper 2 and
A spacer 5 having a truncated cone-shaped concave slope 4 is inserted between the rear cover 1 and the rubber plate 3, and a part of the rubber plate 3 is placed outside the rubber plate 3 with a stopper 2 via a pressing tool 6. 5
A fixing device for lining a rear cover of a rotary cultivator, wherein the fixing device is pressed into the concave slope 4 of the rear cover.