JPH04304801A - Apparatus for covering rotary tiller - Google Patents

Abstract

PURPOSE:To reduce resistance to mud allowed to flow along an elastic cover on the inside of the upper cover in tilling and prevent damage of the elastic cover. CONSTITUTION:An elastic cover 12 is attached through an attaching beam 14 on the inside of upper cover 7 for covering a rotary tilling part from above. The attaching beam 14 is formed in a state curved long in longitudinal direction and has nearly the same height over the total length.

Description

[Detailed description of the invention]

0001

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

0002

[Prior Art] Conventionally, as a cover device for a rotary tiller, an elastic cover has been attached to the inner surface of an upper cover that covers the rotary tiller from above, with a predetermined gap therebetween. There is. This cover device has the advantage of being able to prevent mud from adhering, since the elastic cover constantly vibrates due to mud scraped up by the rotation of the rotary tiller during tilling.

0003

[Problem to be Solved by the Invention] When attaching the elastic cover to the upper cover, unit-sized mounting brackets are provided at predetermined intervals in the front-back and left-right directions on the inner surface of the upper cover, and the elastic cover is attached to these with rivets. A possible structure is to attach it with However, with this structure, the mounting bracket protrudes from the upper cover toward the inner surface, making it difficult for the elastic cover to deform elastically in the portion where the mounting bracket is located. As a result, the elastic cover may be significantly worn and damaged at the mounting bracket, or the dirt scraped up by the rotary tiller may create a large resistance when flowing along the inner surface of the elastic cover, resulting in increased horsepower consumption. be.

In view of the above, the present invention improves the flow of mud along the inner surface of the elastic cover, and prevents damage to the elastic cover.
Alternatively, the purpose is to prevent an increase in horsepower consumption.

[0005]

[Means for Solving the Problems] The present invention includes an upper cover 7 that covers the rotary tiller 3 from above, and a gap 13 is provided between the upper cover 7 and the inner surface of the upper cover 7 to provide elasticity. In a cover device for a rotary tiller equipped with a cover 12, a mounting beam 14 is provided on the upper cover 7 and has substantially the same height over the entire length along the rotation direction of the rotary tiller 3, and an elastic rubber 12 is attached to the mounting beam 14. It is installed.

[0006]

[Operation] During tilling, the mud scraped up by the rotary tiller 3 flows in the front-rear direction along the elastic cover 12 on the inner surface of the upper cover 7. At this time, the elastic cover 12 is vibrated by the mud that hits it, so that mud does not adhere to it. Since the attachment beam 14 to which the elastic cover 12 is attached is provided along the rotational direction of the rotary tiller 3 and at substantially the same height over its entire length, the attachment beam 14 does not act as resistance to the flow of mud. Therefore, damage to the elastic cover 12 can be prevented, and an increase in horsepower consumption can be prevented.

[0007]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Examples of the present invention will be described below in detail with reference to the drawings. 1 to 7 illustrate a first embodiment of the present invention, in which FIG. 7 shows a side view of the entire rotary tiller, and details of each part are shown in FIGS. 1 to 6. In FIG. 7, reference numeral 1 denotes a rotary machine frame, which includes a transmission case 2 and the like, and is attached to the rear of the tractor via a three-point link. 3 is a rotary tilling section, which is made up of a number of tilling claws 5 planted on a claw shaft 4, and this rotary tilling section 3 is attached to a rotary machine frame 1.
It is supported between the lower ends of and is driven to rotate clockwise (arrow a).

A rotary cover 6 covers the rotary tiller 3 and is composed of an upper cover 7, a rear cover 8, a front cover 9 and a rear cover 10. The upper cover 7 covers the rotary tiller 3 from above, and is curved in an arc along the rotation locus of the rotary tiller 3. The upper cover 7 covers the rotary tiller 3 from above. It is attached to frame 1. The rear cover 8 is pivotally attached to the rear end of the upper cover 7 through a hinge 11 so as to be vertically movable, and the rear side cover 10 is fixed to the rotary machine frame 1 through the front side cover 9 and the like.

As shown in FIGS. 1 to 6, on the inner surfaces of the upper cover 7 and rear cover 8, there is an elastic cover 12 made of a rubber plate or the like having a size that covers almost the entire surface of these covers. They are attached with a predetermined gap 13 between them. That is, one continuous elastic cover 12 is attached to the inner surface of the upper cover 7 via a mounting beam 14 and to the inner surface of the rear cover 8 via a mounting plate 15 with rivets 16 and 17, respectively. There is.

As shown in FIG. 5, a plurality of mounting beams 14 are provided on the inner surface of the upper cover 7 at predetermined intervals in the left-right direction. And each mounting beam 14
As shown in FIGS. 1, 2 and 4, the cross section is hat-shaped and has a mounting seat 18 and a pair of left and right legs 19,
It is curved long in the front-rear direction along the rotation locus of the rotary tiller 3, and the height H between the mounting seat part 18 and the leg part 19 is approximately the same over the entire length.

The elastic cover 12 is in surface contact with the mounting seat 18 of the mounting beam 14 from below.
The elastic cover 12 is attached to the elastic cover 12 by a rivet 16 through a washer 20.
is installed. Note that the front end of the elastic cover 12 is
A protrusion 12a that protrudes forward and downward from the upper cover 7
It becomes. As shown in FIG. 4, the washer 20 includes a cylindrical portion 21 to ensure a spacing so as not to compress the elastic cover 12 too much, and a cylindrical portion 21 to prevent the head 22 of the rivet 16 from coming into direct contact with mud. A protrusion 23 formed in a circular shape on the
and has. Note that the rivet 16 can be removed by drilling a hole in the center with a drill or the like.

The mounting plate 15 is in the form of a strip, and as shown in FIG. 2, a mounting seat portion 24 and a connecting portion 25 are formed in the longitudinal direction. This mounting plate 15 has a connecting portion 25 attached to the rear cover 8 so that the mounting seat portion 24 is lifted from the inner surface of the rear cover 8.
is welded to. There are two types of mounting plates 15, long and short, and as shown in FIG. 6, a plurality of long mounting plates 15 are provided at predetermined intervals in the left-right direction so that the longitudinal direction thereof faces up and down. Further, the short mounting plate 15 is provided between the rear ends of the long mounting plate 15. And these mounting plates 15
The elastic cover 1 is attached with rivets 17 and 26 on the mounting seat 24 of the
2 is installed. The rivets 17 and the like are the same as those shown in FIG. 4.

[0013] In the center part of the rear cover 8, there is a
As shown in FIG. 2, a long hole 27 is formed through which the supporting column is passed when the soil cultivator is used. A notch 28 is formed at the center of the rear end of the elastic cover 12 to match the elongated hole 27, so the mounting plate 15 is attached to the rear cover 8 so as to correspond to the inner end of the notch 28. established,
The inner end portion of the notch 28 of the elastic cover 12 is fixed to this.

According to the above structure, the mud thrown backward by the rotary tiller 3 during tilling collides with the elastic cover 12 on the inner surface of the rear cover 8, and part of it is scraped upward by the tiller claws 5. It is raised and flows forward along the elastic cover 12 inside the upper cover 7. At this time, since the elastic cover 12 continues to vibrate due to the collision of mud, mud does not adhere to the inner surface of the elastic cover 12.

The mud scraped up by the tilling claws 5 flows forward in the direction of arrow b while being guided by the elastic cover 12 inside the upper cover 7. In this case, the mounting beam 14 is long and curved in the front-rear direction, and has substantially the same height over its entire length, so it does not provide resistance to the flow of mud. Therefore, the mud flows smoothly, it is possible to prevent damage such as abrasion of the elastic cover 12, and it is also possible to prevent an increase in horsepower consumption during tilling.

The mud flowing along the elastic cover 12 inside the upper cover 7 is guided downward by its protrusion 12a. This prevents mud from scattering forward. Furthermore, compared to the case where the rubber sag is attached separately, since the protruding portion 12a is provided integrally with the elastic cover 12, the number of parts and man-hours can be reduced, and costs can also be reduced. FIG. 8 shows a second embodiment. As shown in FIG. 8, a long hole 29 may be formed in the elastic cover 12 to match the long hole 27 of the rear cover 8.

[0017]

According to the present invention, the upper cover 7 is provided with a mounting beam 14 having substantially the same height along the rotational direction of the rotary tiller 3 over its entire length.
Since the elastic rubber 12 is attached to the mounting beam 14
This does not create resistance to the flow of mud, and therefore, it is possible to prevent damage to the elastic cover 12 and also to prevent an increase in horsepower consumption.

[Brief explanation of drawings]

FIG. 1 is a sectional view of an upper cover side showing a first embodiment of the present invention.

FIG. 2 is a sectional view of the rear cover side.

FIG. 3 is an enlarged view taken along the line A-A in FIG. 1;

FIG. 4 is an enlarged sectional view of the attachment portion.

FIG. 5 is an inner view of the upper cover side.

FIG. 6 is an inner view of the rear cover side.

FIG. 7 is a side view of the rotary device.

FIG. 8 is an inner view of the rear cover side showing a second embodiment of the present invention.

[Explanation of symbols]

1 Rotary machine frame 3 Rotary tillage section 7 Upper cover 8 Rear cover 12 Elastic cover 14 Mounting beam

Claims (1)

[Claims] [Claim 1] An upper cover (7) that covers the rotary tiller (3) from above, the upper cover (7)
There is a gap (13) between the inner surface of the
) and an elastic cover (12) is attached, the upper cover (7) is provided with a mounting beam (14) of substantially the same height along the rotational direction of the rotary tiller (3) and along the entire length. ), and an elastic rubber (12) is attached to the attachment beam (14).