JPS6219802B2 - - Google Patents

Description

[Detailed Description of the Invention] Conventionally, in a Taylor-type tiller used for so-called management work such as inter-tillage, the tiller claws are attached in a radial direction to a rotating shaft that is supported horizontally on the machine body. When working in fields where the soil is hard, the large impact force is strong, causing vibrations in the machine body and causing worker fatigue.

The present invention has been made in view of the above-mentioned circumstances, and includes a tilling claw that is attached to a tilling claw mounting plate provided orthogonally to a rotating shaft that is inclined rearward with respect to the direction of travel. a vertical blade part along an imaginary cylinder; and a vertical blade part extending below the vertical blade part, curved to the outside of the imaginary cylinder, and at the front side of the tilling claw mounting plate, in the direction of rotation thereof, a rear part with respect to the front part. This is an attempt to eliminate the above-mentioned drawbacks by forming a horizontal blade portion having a rake angle that is inclined so that the rake angle is high.

The present invention will be described below with reference to Examples.

In Fig. 1, 1 is the fuselage, 3 is a rotating shaft to which power is transmitted by an appropriate means from the engine 2 disposed at the front of the fuselage, and
It is tilted at an angle α as shown in the figure.

A plurality of tilling claws 5 are attached to the tilling claw attachment plate 4 provided perpendicularly to the rotating shaft 3, and the tilling claws 5 are constructed as follows.

That is, a base 7 fixed by appropriate means to a plurality of mounting seats 6 disposed at the lower part of the tilling claw mounting plate 4, and a virtual cylinder having the rotation shaft 3 as its axis as shown in FIG. A vertical blade part 8 which is curved along A and backward with respect to the rotational direction indicated by the arrow A, which extends at the lower part of the blade part 8 and which is further curved outward of the virtual cylinder A, and It is formed by a horizontal blade part 9 on the front side of the tilling claw mounting plate, which has a rake angle β that is inclined in the direction of rotation so that the rear part is higher than the front part, and extends toward the rear part. , and is configured so that forward thrust is generated by the rotation.

Since the tilling claw of the present invention is configured as described above, when cultivating flat land, for example, the machine body is rotated using the control handle with the rotation axis 3 facing vertically, and the vertical blade portion is rotated. After plowing the soil in which the vertical cuts were made at step 8 to a predetermined extent using the horizontal blade section 9, the machine body is returned to its original position with the rotating shaft 3 tilted backward at an angle α using the handle, and the tilling claws are attached. When the tilling claw 5 on the front side of the plate 4 is positioned on the front uncultivated land side and rotated, the tilling claw 5 makes cuts in the soil with its vertical blade part 8, and its horizontal blade part 9 tills the soil to the outside. The scooping angle θ of the horizontal blade portion 9, which is exposed to the greatest resistance during operation, changes as the blade rotates as follows.

That is, in FIG. 5, the rake angle θ of the horizontal blade part 9 at the front part C on the front-rear center line of the tilling claw mounting plate 4 during operation is on the horizontal plane in the coordinate system rotating at the same number of rotations as the rotating shaft 3. On the other hand, it changes in a sine curve shape, that is, as the blade portion 9 rotates from the front to the rear in the direction indicated by the arrow A, it gradually increases, and at A rotated by 90 degrees, the maximum value β + (90 degrees - α), and at the rear part 2 on the center line, which is rotated by 180° and gradually decreases, β is the same as that at the front part C, and as it rotates further forward, it continues to decrease and rotated by 270°. Then, the minimum value β−(90°−α)
Furthermore, as it rotates forward, it gradually increases, and when C rotates 360°, the rake angle β at the original position becomes
change to return to .

The resistance and therefore the reaction force applied to each side blade part 9 of the tilling claw 5, which rotates while changing the scooping angle θ during operation, depends on the magnitude of the scooping angle θ of the blade section 9 during operation. In relation to this, while the blade portion 9 rotates from the front to the rear, the scooping angle θ bites downward into the ground. F ₁ is the resistance received between N, R, and C as the rake angle θ rotates from rear to front gradually decreases, increases again to the rake angle at the original position C, and is pulled out from the ground surface. is greater than the reaction force F ₂ ,
In particular, the reaction force is maximum near the above-mentioned A where the horizontal blade portion 9 moves in the front-back direction, and is minimum near the above-mentioned B.

To further discuss this point in the case where there is a relationship β > 90° - α and the horizontal blade portion 9 is located in the above A and B, the horizontal blade portion 9 in the above A is When the scooping angle θa reaches the above maximum value, the height of the rear end of the blade in the rotating direction relative to the tip becomes ha, and in the above b, as shown in FIG. 7, the scooping angle θb becomes the above maximum value. When the minimum value is reached,
The height of the rear end of the blade portion in the rotational direction relative to the tip is h', and h'a is naturally larger than h'.

Therefore, the resistance applied to the horizontal blade part 9 from the rear in A above is greater than the resistance applied from the front in B above. The reaction force, ie, the forward thrust, is greater than the rearward reaction force, ie, the rearward thrust, received from the soil in (b) above.

The tilling claws 5 receive a large thrust from the forward reaction force F ₁ received while the horizontal blade portion 9 rotates from the front to the rear, and this thrust F ₁ is
By attaching a plurality of tilling claws 5 to the tilling claw mounting plate 4 and rotating them at high speed, it becomes continuous and strong.

From the above description, it seems that the horizontal blade part 9 is
The forward reaction force, that is, the forward thrust F ₁ received between A to D, is greater than the rearward reaction force, that is, the rearward thrust F ₂ , received between N, B, and C, and therefore, the resultant force of these forces is The forward thrust F, which is F ₁ −F ₂ , acts on the tilling claw attachment plate 4 via the tilling claw 5, and thus on the aircraft body.

The thrust F can cause the aircraft to move forward by positioning the center of gravity of the aircraft on a vertical plane that includes the direction line of the thrust F.

However, the location where the thrust force F acts is low relative to the center of gravity, and the moment causes the aircraft to tip over backwards, but this is because the distance between the grip of the handle and the center of gravity is large. This makes it extremely easy for the operator to prevent this, and the aircraft can therefore travel easily and smoothly using the thrust.

In addition, in the above embodiment, the case was described in which the tilling claws were attached to one tilling claw mounting plate 4, but there is no problem even if the tilling claws are attached to a plurality of said mounting plates 4, and in this case, These rotation directions are appropriately selected, and the center of gravity of the aircraft is positioned on a vertical plane that includes the direction line of the resultant force of the forward thrust F.

As described above, in the present invention, the tilling claws are attached to the tilling claw mounting plate provided perpendicularly to the rotating shaft tilting backward, and the tilling claws are attached to the mounting plate with the base part and the rotating shaft as the axis. The vertical blade part extends along the virtual cylinder and the lower part thereof, is curved toward the outside of the virtual cylinder, and is located in front of the tilling claw mounting plate, with the rear part being higher than the front part in the direction of rotation. It is formed by a horizontal blade part with an inclined rake angle,
Moreover, because forward thrust is generated by the rotation, it is possible to perform tilling work and advance the machine without installing a traveling device on the machine.Moreover, the tilling claws are constantly in contact with the soil, making it possible to till the soil. Unlike Taylor-type cultivating claws, which are attached radially to the rotating shaft, no impact force is applied to the plowing claws during field management work on hard soil, and the machine body does not vibrate. A remarkable effect can be expected in that the worker will not get fatigued.

[Brief explanation of the drawing]

Fig. 1 is a perspective view showing an embodiment of the present invention;
3 is a perspective view and a plan view of the present invention, FIG. 4 is a diagram showing the working state of the present invention, FIG.
FIG. 7 is an explanatory diagram of the present invention. 1... Aircraft, 2... Engine, 3... Rotating shaft,
4... Cultivating claw mounting plate, 5... Cultivating claw, 6... Mounting seat, 7... Base, 8... Vertical blade part, 9... Horizontal blade part,
A...Virtual cylinder, α...Inclination angle of rotation axis 3, β
...The scooping angle of the side blade part.

Claims (1)

[Claims] 1. A base for attaching a tilling claw to a tilling claw mounting plate provided perpendicularly to the rotating shaft tilting backward, a vertical blade portion along a virtual cylinder with the rotating shaft as the axis, and A rake angle is provided at the lower part of the vertical blade part, is curved toward the outside of the cylinder, and is inclined so that the rear part is higher than the front part in the rotation direction on the front side of the tilling claw mounting plate. 1. A vertical cultivating claw for a tailor, characterized in that it is formed of a horizontal blade portion having a horizontal blade portion, and furthermore, the rotation of the horizontal blade portion generates a thrust force in the forward direction.