JPS627043Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to an improvement in a side-drive type rotary tiller that is connected and mounted on the rear body of a tractor.

A side-drive rotary tiller has a large number of tilling claws attached to its tilling claw shaft, and when cultivating a field using the parallel width of the tilling claws as a tilling width, the side-drive type rotary tiller uses the tilling width in the center of the tilling width. It may be desirable to crush the soil particularly finely.

The present invention was made in response to this demand, and an object of the present invention is to provide a side-drive type rotary tiller that can sufficiently crush the soil in the center of the tilling width.

In order to achieve this objective, the present invention has a large number of tilling claws attached to a horizontal tilling claw shaft with the rotation locus circles at their tips having approximately the same diameter, and the upper part of the tilling claws is approximately half the diameter of the tilling claws. A side-drive type rotary tiller is proposed, which is covered with a circular tiller cover, the central part of which is closer to the tiller claws than the other parts.

Next, an example of implementation will be described in detail according to the drawings.

In FIG. 1, reference numeral 1 indicates a conventionally known riding-type tractor, and reference numeral A indicates a side-drive type rotary tiller according to the present invention, which is connected and attached to the rear body of the tractor 1. The side drive type rotary tiller A has a tractor 1 attached to its machine frame 2.
The left and right lower links 10 (one is omitted in the drawing) installed at the rear of the tractor 1 are connected to the top link 11, and the lift arm 12 installed on the tractor 1 is connected. The input shaft 21 is attached to the rear of the tractor 1's body so as to be raised and lowered by the operation of the lift arm 12, and protrudes from the gear case 20, which is the main body (or connect bracket) of the machine frame 2. The transmission is transmitted to the PTO shaft installed in the machine via the universal joint shaft 13, and the machine frame main body 20 has shafts on both sides thereof so as to constitute the machine frame 2 together with the machine frame main body 20. While the cylinders 22 and 23 are assembled, a side gear box 24 is assembled to the protruding end of each of the cylinders 22 and 23 at the tip of one cylinder 22, and a side plate 25 is installed at the tip of the cylinder 23 of the other cylinder. The tilling claw shaft 30 of the tilling rotor 3 is supported between the lower parts of the side gear box 24 and the side plate 25, and the rotational power input from the input shaft 21 is transferred to the shaft cylinders 22 and 23. The power is transmitted to the tilling claw shaft 30 through a transmission mechanism in one of the shaft cylinders 22 and the side gear box 24, and the tilling work is performed by the tilling claws 31 attached to the circumferential surface of the tilling claw shaft 30. In certain respects, it is a conventional side-drive rotary tiller, no different from those known in the art.

a is a large number of tilling claws 3 mounted in parallel on the tilling claw shaft 30 of the side drive type rotary tillage device A;
1... A tilling cover assembled to the machine frame 2 of the side drive type rotary tilling device A so as to cover the upper surface of the tilling claw shaft 30, which is made of iron plate material and has a roughly semicircular cross-sectional shape that is gently curved. A cover main body 4 is formed into a substantially semi-cylindrical shape that extends over the entire width in the direction, and has a through hole 40 in the center thereof, and a lid that is separately formed from an iron plate material and closes the through hole 40. It consists of a center cover 5 fixed to the cover main body 4 in a shape, and both ends are assembled and fixed to the side gear box 24 and side plate 25 through separately formed side plates 6, 6. It is attached to frame 2.

The through hole 40 formed in the central part of the cover main body 4 allows the tilling cover a to be inserted into the machine frame 2 as described above.
It is provided at a position corresponding to the gear case 20 (bevel gear case), which is the main body of the machine frame, and has a large size into which the downward bulging part 20a of the gear case 20, which is the main body of the machine frame, is fitted. It is formed exactly.

Also, a center cover 5 is fixed to the cover main body 4 so as to serve as a cover plate that closes the through hole 40.
This is so as to form a recess W into which the downward bulging portion 20a of the gear case 20 that comes to fit into the through hole 40 is inserted when the tillage cover a is assembled to the machine frame 2 as described above. The peripheral flange portion 50 is formed into a dish shape, and is provided with a stepped surface w on the rear end side in the rotational direction of the tilling claws 31.
It is fixed to the cover main body 4 by spot welding. As a result, the central portion of the tilling cover a in the axial direction of the tilling claw shaft 30 is brought close to the rotation locus circle of the tilling claws 31 as shown in FIG.

Note that 7 is an auxiliary rotary cover which is vertically connected to the rear edge of the tilling cover a by a hinge 70 so as to be vertically rotatable.

The embodiment device constructed in this manner operates as follows.

When the tilling claw shaft 30 is driven to rotate and a large number of tilling claws 31 attached thereto are used to till the field in the width where the tilling claws 31 are arranged in parallel, the field is located at the center in the width direction. Cultivating claw 31...
The soil that is thrown up by the tiller is moved to the step surface w on the rear end side of the dish-shaped center cover 5, which is installed at the center of the tiller cover a in the width direction so as to be close to the rotation locus of the tip of the tiller claws 31. They collide and receive a crushing action, improving the soil crushing effect in the center of the tilling width.

As explained above, in the side drive type rotary tilling device according to the present invention, a large number of tilling claws are attached to the horizontal tilling claw shaft so that the rotation locus circles at their tips are approximately the same diameter, and the upper part of the tilling claws is is covered with a roughly semi-circular tilling cover, and the center part of this tilling cover is closer to the tilling claws than the other parts, so that the soil that is thrown up by the many tilling claws attached in parallel to the tilling claw shaft is The soil thrown up by the tilling claws attached to the central part of the tilling claw shaft collides strongly with the center of the tilling cover and is effectively crushed, causing the soil in the center of the tilling width to be crushed. Improve the effect.

[Brief explanation of the drawing]

Fig. 1 is a partially cutaway side view of an embodiment of the device of the present invention, Fig. 2 is a partially cutaway rear view of the main parts of the same device, and Fig. 3 is a perspective view of the tilling cover of the same device;
FIG. 4 is a side sectional view of the main part of the same device, FIG. 5 is a plan view of the main part of the tilling cover of the same device, and FIG. 6 is an explanatory diagram of the operation. Explanation of drawing symbols, A...Rotary tillage device,
a...Plowing cover, 1...Tractor, 10...Lower link, 11...Top link, 12...Lift arm, 13...Universal joint shaft,
2...Machine frame, 20...Machine frame main body (gear case),
20a... downward bulge, 21... input shaft, 22,
23... Shaft cylinder, 24... Side gear box, 2
5... Side plate, 3... Tilling rotor, 3
0...Tilling claw shaft, 31...Tilling claw, 4...Cover main body, 40...Through hole, 5...Center cover, 5
0... Peripheral flange, 6... Side plate, 7... Auxiliary rotary cover, 70... Hinge, W... Recess, w...
...dan side.

Claims (1)

[Scope of utility model registration request] A large number of tilling claws are attached to the horizontal tilling claw shaft so that the rotation locus circles at their tips are approximately the same diameter, and the upper part of the tilling claws is covered with a substantially semicircular tillage cover.
This side-drive type rotary tiller is characterized in that the central part of the tiller cover is closer to the tiller claw than the other parts.