JP2694744B2 - Rotary cover structure in tiller - Google Patents

Description

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a rotary cover structure for a tiller. 2. Description of the Related Art Conventionally, in a tiller constructed by attaching a rotary cover above a plowing rotary for plowing, which has a substantially maximum radius, the rear part of the rotary cover is already installed at the maximum plowing depth. The structure was such that the surface of the cultivated land was scraped deeply. Further, in the technique described in Japanese Utility Model Publication No. 49-130004, since the side cover is not provided on the side of the rotary cover, the soil cultivated by the plowing rotary is already on the side, that is, the rear cover. Scattered on a leveled field, unevenness occurs in the field,
As a whole, there is a problem that good leveling action cannot be achieved. DISCLOSURE OF THE INVENTION Problems to be Solved by the Invention According to the present invention, the surface of the cultivated land is not deeply shaved at such a maximum plowing depth, and the leveling action can be surely and favorably completed. It is possible to perform good leveling action even when shallow plowing, and moreover, the soil cultivated by the plowing rotary is on the side compared to the case where the side cover is not provided on the side of the rotary cover. On the other hand, in a cultivator that is less likely to be scattered in a field that has already been leveled by the rear cover, and that unevenness can be reduced in the field, and that a good leveling action as a whole can be performed. It provides a rotary cover. Therefore, according to the present invention, the rotary cover 2 is attached to the upper side of the tilling rotary 1 where the radius is approximately the maximum plowing depth, and the lateral side of the rotary cover 2 is covered. In the tiller having side covers 7, 7, the rear end portion 2a of the rotary cover 2 is extended in the extending direction of the straight line L connecting the grounding side tangent of the wheel 3 on the front of the machine body and the shaft 4 of the tilling rotary 1. The rear cover 2 is formed so as to be positioned, and the front end 5a of the rear cover 5 made of a wide flat plate is rotatably pivotally attached to the rear end 2a of the rear cover 2 and the lower ends of the side covers 7 and 7 are set at the maximum plowing depth. It is configured to be located near the ground surface. Therefore, at the maximum plowing depth, the rear end of the rotary cover grounds properly without shaving the surface of the cultivated land deeply, and the rear cover makes an effective leveling action while contacting the entire surface of the ground. In addition, even when the plowing depth is shallow, the rear portion of the rear cover can favorably perform the leveling action while being inclined in the front-rear direction, and the mud scattering by the plowing rotary can be prevented. The leveling action can be effectively performed. Further, as compared with a rotary cover not provided with a side cover on the side, the soil cultivated by the plowing rotary is on the side, that is, the rear cover does not scatter into a field that has already been leveled, It is possible to reduce the occurrence of unevenness in the field. The embodiments shown in the drawings will be described below. FIG. 1 shows a side view of the tiller, in which a tillage case 9 is provided upright at the rear part of the fuselage which has both wheels 3 and 3 and a handle 8 is extended to the rear of the tillage, and the lower part of the tillage case 9 is provided. A shaft 4 which is a pawl shaft is extended on both sides, and a large number of plowing pawls are arranged on the shaft 4 to form a plowing rotary 1, and a rotary cover 2 is attached above the plowing rotary 1 to form the plowing rotary 1. A tail wheel 11 is vertically erected from the upper rotary frame 10 at the rear center of the so as to have the same structure as the conventional type. Side covers 7, 7 are respectively provided on both sides of the rotary cover 2, and the lower ends 7a of the side covers 7, 7 are located near the ground surface at the maximum plowing depth, which is preferable. The lower ends 7a of the side covers 7 located behind the shaft 4 are straight lines that match the extension direction of the straight line L that connects the tangential line of the wheel 3 on the grounding side and the shaft 4. Rear end 2 of cover 2
a is formed so as to be positioned in the extension direction of the straight line L connecting the grounding side tangent line of the wheel 3 and the shaft 4, and the rear end portion 2a is provided with the front end portion 5a of the rear cover 5 made of a flat plate through the hinges 6. The rear cover 5 is rotatably pivotally mounted and has a notch 12 formed at the center of the rear cover 5 through which the support rod 11a of the tail wheel 11 is inserted. In the figure, A indicates uncultivated land and B indicates already cultivated land. Therefore, at the maximum plowing depth, as shown in FIG. 4, the shaft 4 moves to the ground surface while the plowing rotary 1 rotates in the direction indicated by the arrow a while the machine body advances in the direction indicated by the arrow b. The operator pushes down the handle 8 to perform the plowing work so that the rear end portion 2a of the rotary cover 2 advances in the vicinity of the ground surface without greatly scraping the ground surface.
The rear cover 5 is horizontal so as to be parallel to the surface of the cultivated land B, and the entire surface comes into contact with the ground surface to perform a leveling action. In addition, the rotary cover 2 is used when shallow plowing.
The rear end 2a of the rear cover 5 is slightly raised above the ground surface.
Will slightly incline from front to back and back to low, but the rear portion of the rear cover 5 will be in sufficient contact with the ground surface to perform a leveling action. Further, as compared with a rotary cover not provided with a side cover on the side, the soil cultivated by the plowing rotary is on the side, that is, the rear cover does not scatter into a field that has already been leveled,
It is possible to reduce the occurrence of unevenness in the field. As described above, according to the present invention, at the maximum plowing depth,
The rear end of the rotary cover does not scrape the ground surface deeply, and the rear cover behind it can contact the ground surface well over the entire surface and perform an orderly leveling operation in a horizontal state, Even when the plowing depth is shallow, the leveling effect can be satisfactorily achieved by the rear cover, and the mud scattering by the tilling rotary can be effectively prevented and the leveling effect can be effectively performed. In addition, compared to the rotary cover that has no side cover on the side,
The soil cultivated by the plowing rotary is lateral, that is,
The rear cover rarely scatters in a field that has already been leveled, the occurrence of irregularities in the field can be reduced, and a good leveling effect can be achieved as a whole.

[Brief description of the drawings] FIG. 1 is a side view of a tiller according to an embodiment of the present invention. FIG. 2 is a side sectional view of a main part. FIG. 3 is a rear view of a part of FIG. FIG. 4 shows an operation explanatory view of FIG. [Explanation of symbols] 1 Rotary for plowing 2 rotary cover Three wheels 4 axes L straight line 2a rear end 5 Rear cover 5a front end 7,7 Side cover

Claims (1)

(57) [Claims] In the tiller, in which the rotary cover 2 is attached to the upper side of the tilling rotary 1 where the approximate radius becomes the maximum tilling depth, and the side covers 7, 7 are provided on the side of the rotary cover 2, configured rear end portion 2a of the rotary cover 2 and the ground-side tangential to the direction of extension of the straight line L connecting the axis 4 of the tillage appointment rotary 1 of the wheel 3 is positioned parts
Together and, at its rear end portion 2a is constructed by pivotally rotatably to the front end 5a of the rear cover 5 made broad surface flat, the maximum
When plowing, the lower ends of the side covers 7 and 7 are near the ground surface.
Rotary characterized by being configured to be located at
Cover structure.