JPH02138902A - Rotary tiller cover device - Google Patents

Abstract

PURPOSE:To rebound the splashing soil with the force restoring the elastic deformation to smoothen the soil crushing and the soil throwing backward and prevent soil sticking satisfactorily by giving a tension to the elastic cover covering the tilling part A by means of an energizing mechanism. CONSTITUTION:Attachments 14 through 17 are fitted to the frame 7 of the rotary tiller, and the elastic cover 24 covering the tilling part A is fixed to these attachments on one side from the front to the rear. The elastic cover 24 is provided with a stitching material 26 on the other side and an energizing mechanism 27 is set between the fixed side containing the attachments 14 through 17 and the stitching material 26 to give a tension to the elastic cover 24, further the energizing mechanism 27 is equipped with a tension adjuster 38. Since the elastic cover 24 covering the tilling part is energized with the mechanism 27, the splashing soil is rebounded by the restoring force of the cover, thus soils are effectively crushed and sent backward. ln addition, the sticking soil can be surely detached from the machine.

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a cover device for a rotary tiller that can prevent soil from adhering to the cover device.

(Prior art) As a conventional technology of this type, Utility Model Application No. 52-136007
There is a method disclosed in the above publication, in which an elastic cover is arranged on the inner peripheral surface of a steel plate cover fixed to the rotary machine frame, and this elastic cover is fixed to the steel plate cover at the front, middle and rear parts,
The middle part is made to sag vertically, and the sagging part absorbs the impact of scattered soil and prevents soil from adhering to it.

(Problem to be Solved by the Invention) The sagging of the elastic cover of the prior art has a weak restoring force of elastic deformation, and the soil adhesion prevention effect and the effect on the frame are insufficient, and the scattered soil is only on one side of the sagging part. There are problems in that it is easy to collide and be locally damaged, and it is difficult to scatter soil backwards.

An object of the present invention is to provide a cover device for a rotary tiller that can solve all of the problems of the prior art by applying tension to the elastic cover.

(Means for Solving the Problem) A specific means for solving the problem according to the present invention is to attach a mounting member to the rotary machine frame 7, and attach the tilling section A to the mounting member.
In a rotary cultivator cover device in which an elastic cover 24 is attached to one front and rear side to cover the rotary tiller, a edging member 26 is provided on the other front and rear sides of the elastic cover 24 to cover the rotary machine frame 7 and the fixed side including the mounting member and the edging member. A tension applying mechanism 27 for applying tension to the elastic cover 24 is provided between the elastic cover 26 and the elastic cover 24, and this tension applying mechanism 27 is provided with a tension adjusting means 38.

(Function) The elastic cover 24 covers the tilling section A under tension by the tension applying mechanism 27, and when soil scattered from the tilling section A collides with the elastic cover 24, the coil springs 35 are elastically deformed. The elastic cover 24 is elastically deformed, detaches the attached soil, and uses its restoring force to spring the soil backward or toward the plowing area, and sends the scattered soil backward while crushing it.

When the elastic cover 24 stretches or the field conditions change, the tension adjustment means 38 of the tension applying mechanism 27 is activated.
The elastic cover 24 is again placed in the optimum tensioned state.

(Example) Embodiments of the present invention will be described below with reference to the drawings.

In the first embodiment shown in FIGS. 1 to 4, a rotary tiller 1 has a central gear case 2 and a sabot 1-arm 3 on the left and right.
The transmission case 4 is attached to the outer end of the left and right support arms 3.
and a side frame 5 are fixed, and a side wall 6 is provided on the inner surface of the transmission case 4 and the side frame 5, and these constitute a rotary machine frame 7. It rotatably supports a claw shaft 9.

The tilling section A indicated by the rotation locus of the tilling claws 8 is covered with a cover device 11. The cover device 11 is part B of the main cover.
, a rear cover part C, and an extension cover part, and a front cover 12 and a rear cover 13 are provided on the left and right sides thereof.

In the main cover part B, 14 is an upper cover formed of an iron plate or punched metal, etc., and both ends of the upper cover are attached to the left and right side walls 6, and supporting frame members are installed on the front and rear parts of the left and right side walls 6. It is also fixed on 15.16.17.

The rear part of the front support member 15 and the rear support member 16 are located approximately along the tilling part A, and the two parts of the side elastic cover 22 are connected to these and the upper part of the side wall 6 via the presser members 1B and 19.20. is installed.

The side elastic cover 22 is a plate-like material made of rubber or elastic synthetic resin, and is capable of protecting the inner surfaces of the transmission case 4 and side frame 5 from flying soil, and reducing the rate of wear of the deformed claws. The front and rear covers 1 protrude from the transmission case 4 and the side frame 5 in the front and rear.
2.13, and its lower part is attached to the transmission case 4 and the side frame 5 via a stopper 23, so that it can be placed in a tensioned state.

24 is an elastic cover that substantially covers the upper part of the cultivation area A, and is a plate-shaped material made of rubber or elastic synthetic resin;
Its rear part is fixed to the rear support member 16 by also serving as a port 25 that fixes the rear part of the rear support frame member 16 and the back support frame member 17, and the front part is fixed to the rear support member 16 with a bifold plate-shaped edging member 2.
6 is fixed and connected to a tension applying mechanism 27 via this edging member 26.

A backing material 28 is disposed over the entire width at one or more locations in the middle of the elastic cover 24 in the front-rear direction, and is fastened to the tilling portion from the side with screws 29. This backing moon 28 is formed of channel material, and round bars 30 are welded to both ends thereof. This round bar 30 is supported in a groove 19a of a presser member 19 formed of a U-shaped cross section so as to be movable in the front and rear direction. By supporting this backing material 28 on the side wall 6, the elastic cover 24 takes on the shape of an upwardly protruding arc or trapezoid that roughly follows the tilling area, and because the backing material 28 is movable back and forth, The tension of the elastic cover 24 can be adjusted over its entire length.

One set of the tension applying mechanisms 27 is provided at the front portions of the left and right side walls 6, and an arm 33 and a lever 34 are pivotally supported by a bracket 31 fixed to each side wall 6 via a pivot 32. The tip of the arm 33 is fixed to the edging member 26, and one end of a coil spring 35 fitted to the pivot 32 is locked. The other end of the coil spring 35 is locked within the lever 34.

By rotating the lever 34 clockwise in FIG. 1, the end of the coil spring 35 can be moved in the winding direction, and the spring pressure applied to the arm 33 can be increased. This adjusts the tension of the elastic cover 24, and in order to hold the lever 34 at the adjusted position, the lever 34 is
A lock pin 36 is passed through the bracket 31 and the bracket 31. The bracket 31 is provided with a plurality of through holes 37 for the lock pins 36, so that the lever 34 can be set at a plurality of positions.

Note that even if the lever 34 is fixed, the coil spring 35 always applies elastic tension to the elastic cover 24.
4. The lock pin 36, the through hole 37, etc. serve as a tension adjustment means 38 for adjusting the tension.

In this first embodiment, the left and right side walls 6, the support frame material 1516,
17, the upper cover 14, etc., serves as a mounting member for attaching the elastic cover 24.
It is also possible to fix the front part of the fourth part to the mounting member and pull the rear part rearward. Further, although the tension applying mechanism 27 is fixed to the left and right side walls 6, it can be attached to the rotor IJ machine frame 7 such as the front support frame member 15 or the boat arm 3. Furthermore, it is not necessary to provide the upper cover 14.

In the second embodiment shown in FIG. 5, the upper cover 14 is made of punched metal, and its front part is fixed to the lower part of the front support frame member 15 and the rear part to the lower part of the load support frame member 17, and the upper cover 14 is fixed to the lower part of the load support frame member 17. A rear cover 41 forming a portion C of the rear cover is pivotally supported on a support shaft 40 supported on the support frame member 17 or the rear portions of the left and right side walls 6.

The rear cover 41 has a dogleg-shaped cross section, and has a plurality of reinforcing ribs 42 attached to its upper surface in the width direction, and an extension cover 44 is pivotally connected to its lower portion via a pivot 43.

The rear cover 41 and the extension cover 44 are also formed of punched metal, and an angle setting rod 46 is connected between the plurality of reinforcing ribs 45 provided on the extension cover 44 and the reinforcing ribs 42 of the rear cover 41. . A plurality of pin holes 47 are bored in the reinforcing rib 42, and by changing the pin hole 47 through which the pin 48 connecting the angle setting rod 46 passes, the angle of the extension cover 44 with respect to the rear cover 41 can be changed.

A single elastic cover 24' is placed on the inner surfaces of the upper cover 14, the rear cover 41, and the extension cover 44 (the surface facing the tilling section A), and substantially covers the tilling section A.

This elastic cover 24'' is fixed to the rear part of the upper cover 14 and the front upper part of the rear cover 41, and a front edge member 26F is attached to the front end and a rear edge member 26R is attached to the rear end. A tension applying mechanism 27F has tension adjustment means 38F and 3811 between the member 26F and the left and right side walls 6, and between the rear edge attachment member 26R and the reinforcing lip 45, etc.
, 27R are provided.

The tension applying mechanism 27F has the same configuration as that of the first embodiment, and the tension applying mechanism 27R has a rear edge attachment member 26R fixed to an arm 33R that is pivotally supported by the reinforcing rib 45, and an angle setting with this arm 33Jl. The spring 49 is connected to the rod 46, and the spring 49 applies tension to the portion of the elastic cover 24' extending from the rear cover 41 to the extension cover 44.
By selecting the hole 50 for hooking in the perspective direction,
Configured to adjust tension. The plurality of holes 50 serve as tension adjustment means.

A midway portion of the elastic cover 24'' is supported by a backing material 28 and a pressing member 19 having a U-shaped cross section, and a slack portion 24a is formed between the upper cover 14 and the rear cover 41.

In this second embodiment, the structure formed by the left and right side walls 6, the support frame material 1517, the upper cover 14, etc. is the elastic cover 24.
The structure formed by the rear cover 41 fixed by the angle setting rod 46, the extension cover 44, the reinforcing ribs 42, 45, etc. also constitutes the rear mounting member of the elastic cover 24. ing. The front and rear parts of the elastic cover 24' may be separated. Further, although punching metal is used for the upper cover 14, rear cover 41, and extension cover 44 to make them lightweight, they may also be made of iron plates.

(Effects of the Invention) According to the present invention described in detail above, the elastic cover 24 covering the plowing section A is given tension by the tension applying mechanism 27, so that the scattered soil is repelled by the restoring force of elastic deformation.
Since the soil can be crushed and sent backwards well, and the attached soil is reliably removed, the soil adhesion prevention effect can also be sufficiently achieved.

Moreover, since the tension adjustment means 38 is included in the tension applying mechanism 27, even if the elastic cover 24 is stretched, it can be re-tensioned, and moreover, it is possible to always maintain a good elastic state according to the field conditions.

[Brief explanation of the drawing]

1 to 4 show a first embodiment of the present invention, in which FIG. 1 is a sectional side view of the main part, FIG. 2 is a sectional view taken along the line ■■ in FIG.
3 is a view taken in the direction of the ■ arrow in FIG. 1, FIG. 4 is a side view of the entire rotary tiller, and FIG. 5 is a sectional side view showing the main parts of the second embodiment. 1- Rotary tiller, 6- side wall, 7- rotary machine frame, 11- cover device, 24- elastic cover, 26- edging member, 27- tension applying mechanism, 28- backing material, 38 tension adjustment means, A- Cultivation department. Patent applicant Kubota Iron Works Co., Ltd. Agent Patent attorney Yasu 1) Toshio ■

Claims (1)

[Claims] (1) A cover device for a rotary tiller, in which a mounting member is attached to the rotary machine frame (7), and one front and rear side of an elastic cover (24) that covers the tilling part (A) is attached to the mounting member, the elastic cover (24) on the front and other sides of the hemming member (26)
), and an elastic cover (24) is provided between the fixed side including the rotary machine frame (7) and the mounting member and the edging member (26).
), and the tension applying mechanism (27) is provided with a tension adjustment means (38).