JPH0337364Y2 - - Google Patents

Description

[Detailed Description of the Invention] (Industrial Application Field) The present invention relates to a rake device for a rotary tiller.

(Prior Art) A rotary tiller with a rake has a plurality of rakes made of elastic rods (including round rods and plate-shaped rods, the same shall apply hereinafter) arranged in rows in the tilling width direction inside a tillage cover that covers the rotary tiller. For example, it was disclosed in the October 1984 special feature on mechanized agriculture, ``Tillage Science for Soil Preparation''.

The rake in Conventional Example 1 has its upper end welded to the mounting plate.

In addition, in Utility Model Application Publication No. 51-16008 (Conventional Example 2), a winding part is formed at the upper end of the bar, and a shaft is inserted through this winding part to rotate the rake around the horizontal axis. It is installed by hanging.

(Problem to be solved by the invention) In Conventional Example 1, when stones, hard soil, etc. are scattered during plowing and collide with the rake, the impact is alleviated within the elastic limit of the rake, but if the impact is greater than that, There were cases where the rake was bent and the welded part was damaged.

The winding portion of Conventional Example 2 is for passing the shaft through, and is not intended to impart or add elastic deformation, and therefore has the same problem as described above.

In addition, what is common to Conventional Examples 1 and 2 is that the rake mounting part and winding part are exposed to the rotary plowing part, so if stones etc. collide with the mounting part and winding part, they will be damaged. I was afraid.

Further, as a rake device that prevents stones and the like from colliding with the mounting portion, there is a technique disclosed in Japanese Patent Application Laid-open No. 147537/1982, but this technique requires very complicated mounting of the rake.

This invention forms a winding part on the rake of the rake made of an elastic bar, and the winding part uses elastic deformation to cushion and absorb shock, and also avoids collisions of stones, etc. with the winding part. The object is to solve the aforementioned problems by making the installation of the rake simple and reliable.

(Means for Solving the Problems) The present invention includes a rear cover 9 that covers the rear of the rotary tiller 5 at the rear of the main cover 7 that covers the upper part of the rotary tiller 5, and a rear cover 9 that covers the rear of the rotary tiller 5. In a rake device in which rakes 16 made of elastic rods 17 are provided at predetermined intervals in the tilling width direction, the following technical measures are taken to achieve the above-mentioned object.

That is, in the present invention, the elastic bar 17 of the rake 16 is provided with a pair of winding parts 19 near the mounting seat 18 which is bent into a U-shape in plan view, and the elastic bar 17 of the rake 16 is provided with a pair of winding parts 19 in a straight line through the winding parts 19. Rod portions 20 extending parallel to each other
The mounting seat 18 is clamped and fixed between a seating part 26 formed on the inside of the rear part of the main cover 7 and a mounting bracket 21 attached to this from the outside, and the winding part 19 is formed into an outwardly projecting shape. It is characterized by the presence of

(Function) The rotary tiller 5 of the rotary tiller 1 connected to the tractor is rotated in the direction shown by arrow A in FIG. Plowing work is done in

The tilled soil clod carried around by the tilling claws 4 of the rotary tilling section 5 is moved along the inner surface of the tilling cover 6, and guided rearward (to the right in FIG. 5) while being crushed.

Between the rear cover 9 of the tilling cover 6 and the tilling section 5, rakes 16 are installed at intervals in the tilling width direction, and therefore, tilled soil lumps with a rake interval L or more cannot pass through the interval L. The water falls along the front surface of the rake, and long objects such as grass and straw also fall along the front surface of the rake.

On the other hand, the tilled soil mass with rake spacing L or less is rake 16.
The cultivated soil layer has a structure in which the lower layer is coarse soil, grass, straw, etc., and fine-grained soil is layered on top of it, and the tilled soil layer is covered by the leveled part 9A of the rear cover 9. It is evened out.

The cultivated soil mass contains hard soil, stones, gravel, etc., and when these collide with the rake 16 as shown by the symbol F in FIG. It is elastically deformed from the base point and absorbs the impact force.

Further, when a stone or a large lump of earth collides, the elastic deformation of the elastic bar 17 of the rake 16 alone cannot absorb the impact force F, but the rake 16 has a winding part 19 near the mounting seat 18. Since the rolled-up portion 19 has an outwardly projecting shape, the large collision force F is absorbed through elastic deformation by the rolled-up portion 19, preventing bending, breakage, etc. of the rod portion 20 of the rake 16. is prevented.

(Embodiments) Hereinafter, some embodiments of the present invention will be described in detail with reference to the drawings, but first, the rotary tiller 1 with a rake will be explained with reference to FIG. 5.

A rotary tiller 1 with a rake is connected to a tractor (not shown) via a link mechanism 2 so as to be movable up and down.

A claw shaft that rotates around a horizontal horizontal axis is installed on the rotary machine frame 3, and a rotary tiller section 5 is constructed by attaching a large number of tilling claws 4 capable of up-cutting and down-cutting to the claw shaft.

The rotary tiller 5 receives rotational power from the PTO shaft of the tractor through a universal joint shaft, etc.
It is rotated either in the direction shown by or in the direction opposite to arrow A.

Further, the rotary tilling section 5 is covered with a tilling cover 6, and the tilling cover 6 is connected to a main cover 7 attached to the rotary machine frame 3 and a hinge 8 at the rear of the main cover 7 so as to be able to move up and down. It consists of a supported rear cover 9, front, rear, left and right side covers 10, 11, etc., and a flat portion 9A formed at the rear edge of the rear cover 9 is biased in the direction of ground contact via a bullet lowering mechanism 12. .

In addition, the strength of the bullet lowering force of the bullet lowering mechanism 12 can be adjusted freely.

Furthermore, a gauge wheel 13 for setting the working depth of the rotary tiller 5 is attached to the rotary machine frame 3 via a support rod 14, and by connecting the support rod 14 and the rotary machine frame 3 with an adjustment means 15, , the working depth is said to be adjustable.

A rake 16 is provided inside the tilling cover 6, and the rake 16 is made of an elastic bar such as a metal round bar or a plate-shaped member, and is arranged in a large number in rows at intervals in the tilling width direction.

In the first embodiment shown in FIGS. 1 to 3, a mounting seat 18 in which one elastic bar 17 is bent into a U-shape in plan view at the central portion in the longitudinal direction of the bar
A winding part 19 is formed symmetrically near the winding part 19, and a pair of rod parts 20 following the winding part 19 extend linearly with a rake interval L parallel to each other, and the ends thereof are free ends. It is.

The mounting seat 18 of the rake 16 is fixed to a seating part 26 formed inside the rear part of the main cover 7 of the tilling cover 6 with the winding part 19 projecting outward. The mounting seat 18 is assembled by overlapping the shaped presser fittings 21 from the outside, pressing the bar material with the curved parts 22 formed on both sides of the presser fittings 21, and inserting the bolt 23 into the center and screwing it into the nut 24.
are clamped and fixed, thereby forming a mounting portion 25.

That is, in the first embodiment, as shown in FIG. 1, the frame member 27 of the main cover 7 is lined with a rake attachment member 28, and the attachment member 28 is provided to extend diagonally rearward, so that the seating portion 26 and The nut 24 is welded to the mounting member 28 with an inner lining.

FIG. 3 shows a second embodiment of the present invention, and since the basic configuration is the same as the first embodiment, common members are indicated by common symbols, and differences will be described below. That is, the presser metal fitting 21 also presses the top of the mounting seat 18 with the curved portion 22, thereby pressing the U-shaped mounting seat 1.
8 is pressed evenly.

(Effect of the invention) In the present invention, the rake 16 made of an elastic bar 17 has a mounting seat 18 that is U-shaped in plan view, a winding part 19 is formed near this mounting seat, and the winding part 19 is projected outwardly. Since the mounting seat 18 is clamped and fixed on the seating part 26 formed at the rear of the main cover 7 with the mounting fittings 21, the winding part 19 ensures sufficient elastic restoring force. The rake 16 can be installed easily and accurately. Therefore, the winding part 1
Due to the elastic deformation by 9, the impact is relaxed and absorbed, thereby preventing bending of the rod portion 20 of the rake 16, damage to the attachment portion 25, etc.

In addition, since the winding portion 19 is made to project outwardly and the U-shaped mounting seat 18 is held on the seating portion 26,
Soil, grass, etc. do not adhere to or get entangled with the rolling part 19, and while ensuring elastic deformation of the rolling part 19, the rod part 20 is prevented from moving inadvertently, and interference between the rake 16 and the tilling claws 4 is prevented. It can be prevented.

Therefore, the present invention is very useful as a rake device for a rotary tiller.

[Brief explanation of the drawing]

The drawings show embodiments of the present invention; FIG. 1 is a side cross-sectional view of the first embodiment, FIG. 2 is a plan view of the essential parts, FIG. The figure is a plan view of essential parts of the second embodiment, and FIG. 5 is a side view of the rotary tiller with rake. 5... Rotary tilling section, 6... Tilling cover, 16...
Rake, 17...Elastic bar, 18...Mounting seat, 19...
Winding part, 21... Presser fitting, 26... Seating part.

Claims (1)

[Scope of claim for utility model registration] A rear cover 9 that covers the rear of the rotary tiller 5 is provided at the rear of the main cover 7 that covers the upper part of the rotary tiller 5,
In a rake device in which rakes 16 made of elastic rods 17 are provided at predetermined intervals in the tilling width direction between the tilling section 5 and the rear cover 9, the elastic rods 17 of the rake 16 are bent into a U-shape in plan view. A pair of winding portions 19 are provided near the mounting seat 18.
A seating part 26 formed on the inside of the rear part of the main cover 7, and a mounting bracket 21 attached to this from the outside. clamps and fixes the mounting seat 18 with the winding portion 19.
A rake device for a rotary tiller, characterized by having an outwardly projecting shape.