JPH0438648Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Purpose of the Invention] (Field of Industrial Application) The present invention relates to a rotary tiller that continuously plows a surface using a plurality of desks.

(Prior Art) Conventionally, as this type of rotary tilling device, for example, a desk tilling body is constructed by fixing the centers of a plurality of desks in parallel at a predetermined interval around a rotating shaft, and this desk tilling body As it progresses, it is rotated by input power to plow and reverse the tilled soil.

(Problems to be Solved by the Invention) In this case, each of the conventional desks is generally formed of a so-called one-piece piece with a cutting edge formed on its outer periphery. However, with this type of desk structure, the cutting blade often becomes partially worn and damaged depending on soil work conditions, and in such cases,
Since it is not possible to replace only the worn and damaged desk, the entire desk cultivating body must be replaced, which is extremely uneconomical.

Therefore, as described in U.S. Patent No. 4,246,971, bolts and nuts are attached to the desk support formed at the end of the support shaft, which has a larger diameter than the support shaft, with the outer desk main body and the inner desk main body superimposed. A structure is known in which the inner peripheral edge of the annular blade is sandwiched between the peripheral edges of the inner and outer desk bodies.

However, even with this structure, although the desk is divided into the desk body and the annular blade, if the annular blade becomes partially worn and damaged, the entire annular blade must be replaced. When replacing the blade, it is necessary to separate the inner desk body from the outer desk body, which requires a lot of effort to attach and detach the annular blade. When applied to a desk cultivating body that penetrates and fixes the rotating shaft, when the annular blade of the desk other than the end part becomes worn and damaged, the desk support at the end part will pull the worn and damaged desk body in the axial direction. Since it cannot be removed, the entire desk cultivating body must be replaced, which is uneconomical.

Therefore, the present invention was developed in view of the above points.In the event that the blade of the desk is partially worn and damaged, it is possible to easily remove and replace only the worn part, and the blade has a hardness that corresponds to soil work conditions. The object of the present invention is to provide a rotary tillage device that can be selectively used in whole or in part.

[Structure of the idea]

(Means for Solving the Problems) The rotary tilling device of the present invention includes a desk tilling body having a plurality of desks for continuously tilling and inverting the soil, each desk of the desk tilling body having a desk body. Each desk main body is fixed to a rotating shaft passing through its center at intervals, and a plurality of divided blades are arranged in an annular shape on each peripheral edge of each desk body. Each is attached to the desk body using bolts and nuts so that they can be attached and removed freely.

In addition, in the above structure, each of the divided blades has a cutting blade part having at least one of a wave shape, a sawtooth shape, and a straight part on the outer edge of the mounting plate part attached to the respective desk body. It was formed.

(Function) In the rotary tilling device of the present invention, the machine frame is connected and towed by, for example, a tractor, and when the rotary shaft of the desk tiller is rotationally driven by the power from the tractor via the transmission, The tilled soil is continuously tilled and turned over in a predetermined width by each desk of this desk tilling body. If the blade part of the desk becomes partially worn and damaged without removing the desk tiller, simply replace the worn and damaged split blade with a new split blade and its desk body using bolts and nuts. That's fine.

(Embodiment) Hereinafter, the structure of an embodiment of the present invention will be described based on the accompanying drawings.

In what is shown in FIGS. 1 to 3, reference numeral 1 denotes a machine frame, and the front part of this machine frame 1 is provided with a connecting portion 2 that is connected to a three-point linkage mechanism of a tractor.

Drive desk cultivating bodies 3 serving as left and right desk cultivating bodies are disposed at the lower portions of both left and right sides of the machine frame 1. In the left and right drive desk cultivating bodies 3, the inner end portions of a main frame 5 are supported horizontally rotatably through support shafts 4 at the left and right lower portions at the rear of the machine frame 1, respectively. A rotating shaft 8 is rotatably mounted via a transmission case 6 at the outer end and a bearing 7 at the inner end, and a plurality of circular bowl-shaped desks 9 are arranged in a continuous manner in the axial direction of the rotating shaft 8. In other words, a plurality of desks 9 are fixed to each other at intervals corresponding to the plowing and reversal, with the rotating shaft 8 passing through the center of each disk. Further, the outer ends of the angle adjustment arms 11 are rotatably mounted on the rear parts of the left and right main frames 5 by means of support shafts 10, and the inner ends of the left and right angle adjustment arms 11 are
It is fixed to a support frame 14 protruding from the center rear part of the machine frame 1 with bolts and nuts 13 through one of a plurality of attachment holes 12 drilled at appropriate intervals. Then, by selecting the mounting holes 12 of the left and right angle adjusting arms 11 and attaching and fixing them with bolts and nuts 13, each angle adjusting arm 11 can be adjusted to extend or contract, and the main frame 5 can be moved around the support shaft 4 relative to the machine frame 1 as a fulcrum. It rotates to adjust and set the angle of the left and right drive desk cultivating bodies 3.

Next, each of the desks 9 has a desk main body 15 that is integrally fixed to the rotation shaft 8 at predetermined intervals, that is, at intervals for continuously tilling and reversing the soil. On the peripheral edge of each desk body 15, a plurality of divided blades 16 are arranged in an annular manner, and each of the divided blades 16 is connected to a plurality of bolts/nuts 17.
It is constructed so that it can be attached and detached and exchanged freely. Each of the divided blades 16 is formed with a mounting plate portion 16a that is attached to the respective desk main body 15, and a sharp-pointed arc-shaped cutting blade portion 16b that is continuously formed on the outer edge of the mounting plate portion 16a. There is.
The cutting edge portion 16b of this split blade 16 is not limited to the form shown in FIGS. 2 and 3 above, but is
As shown in the figure, it may be formed as a wave-shaped cutting blade 16c with a wave-shaped cross section, or as shown in FIGS. 6 and 7, a sawtooth-shaped cutting blade 16d with a serrated shape in side view. It may be formed as This makes it possible to reliably cut away foreign matter on the ground surface. Further, as shown in FIGS. 8 and 9, the cutting blade portion 16b may be formed as a linear cutting blade 16e having a plurality of direct portions when viewed from the side.
As a result, a plurality of suction portions are present with respect to the outer circumferential action locus of the disk 9, and the ability to dig into the soil is improved. In the case of each of the embodiments described above, the divided blades 16 may have the same hardness in series with respect to the desk main body 15, or may have partially different hardnesses. In addition, several types of split blades 16 with different hardnesses are prepared in order to correspond to soil work conditions.
A material with optimum hardness is attached to each desk main body 15 according to soil work conditions.

Next, attach the transmission 1 to the upper center of the machine frame 1.
8 is provided. This transmission 18 has a power input shaft 19 protruding from the front portion thereof which is connected to the power take-off portion of the tractor, and a power output shaft 21 which is connected to the power input shaft 19 via a bevel gear mechanism 20 from the left and right portions. It is installed protrudingly. and,
A transmission shaft 23 is connected to both ends of the power output shaft 21 via a universal joint between both ends of the power output shaft 21 and the input shaft 22 protruding from the upper end of the left and right transmission cases 6, and the power is transmitted from the tractor to the transmission 18. Input shaft 19, bevel gear mechanism 20, power output shaft 21, transmission shaft 23, input shaft 2 of transmission case 6
2. The power is transmitted to the left and right rotating shafts 8 through a sprocket and a chain (not shown) in the transmission case 6, so that each desk 9 is rotationally driven.

Next, a pair of pre-processing desks 24 are attached to the lower central part of the machine frame 1 in the front part between the left and right drive desk cultivating bodies 3, and are attached in a substantially V-shape in plan view, and are rotatably mounted on a shaft. has been done. In the figure, 25 is a scraper for the pretreatment desk 24, and 26 is a soil derivative.

In this structure, the connecting portion 2 of the machine frame 1 is connected to the three-point link mechanism of the tractor, and the power input shaft 19 of the transmission 18 is connected to the power take-off portion of the tractor via a universal joint. The machine is towed by a tractor while each of the desks 9 in the left and right driving desk cultivating bodies 3 is rotationally driven. Then, the tilled soil is continuously tilled and reversed over a predetermined width by each desk 9 of the left and right driving desk tillers 3.

At the same time, the pair of pretreatment desks 24 at the lower center rotate at an intermediate position between the left and right drive desk tillers 3 and at a position slightly ahead of the left and right drive desk tillers 3 to cut and till the tilled soil in advance. Raise it and flip it left and right. Further, the soil inverted by the pair of pretreatment desks 24 is guided and dispersed by the left and right soil guides 26 to the front side portions of the desks 9 of the left and right drive desk cultivating bodies 3 as the pair of pretreatment desks 24 move forward. Therefore, as a whole, the surface plowing is carried out in an orderly manner without particularly high raised areas.

[Effect of idea]

According to the present invention, the desk cultivating body has a plurality of desks arranged side by side at intervals to continuously till and turn the soil, and each of the desks is connected to a rotating shaft penetrating the center of the desk body. At the peripheral edge of each desk body, a plurality of divided blades are arranged in a ring shape, and each of these divided blades can be attached to and removed from the desk body by bolts and nuts. Because it is fixed freely, if the blade part of each desk becomes partially worn and damaged, it is only necessary to replace the worn and damaged split blade with respect to each desk body. There is no need to replace the entire desk or separate the desk body, and it can be easily supplemented by simply attaching and detaching the split blade without modifying the desk body.
Therefore, it is extremely economical compared to replacing the entire desk tiller or replacing the entire blade. In addition, each split blade can be attached to and removed from the respective desk body using bolts and nuts, so it is possible to easily select the shape and hardness suitable for soil work conditions. As a result, it is possible to provide an economical and highly practical rotary tiller with excellent workability.

[Brief explanation of drawings]

The figures show an embodiment of the present invention, in which Fig. 1 is a plan view of the rotary tiller, Fig. 2 is a front view of the same desk, Fig. 3 is a sectional view of the same, and Figs. 4 to 9.
The figure shows another embodiment of the desk.
Figures 6 and 8 are front views of the desk;
7 and 9 are perspective views of the divided blade. 1... Machine frame, 3... Desk cultivating body, 8... Rotating shaft, 9... Desk, 15... Desk body, 16...
...Divided blade, 16a...Mounting plate part, 16b, 16
c, 16d, 16e... Cutting blade portion, 17... Bolt/nut, 18... Mission.

Claims (1)

[Scope of Claim for Utility Model Registration] (1) A desk cultivating body having a plurality of desks for continuously tilling and turning the soil, each desk of the desk cultivating body having a rotary plate that penetrates through the center of the desk body. Each desk body is fixed to the shaft at intervals, and a plurality of divided blades are arranged in an annular manner on the peripheral edge of each desk body, and each of these divided blades is attached to the desk body. A rotary tillage device characterized by being detachably attached with bolts and nuts. (2) Each of the divided blades shall have a cutting edge formed in at least one of a wave shape, a sawtooth shape, and a straight part on the outer edge of the mounting plate part to be attached to the respective desk body. A rotary tillage device according to claim 1 of the utility model registration claim, characterized in that: