JPS6219801B2 - - Google Patents

Description

[Detailed Description of the Invention] Conventionally, rotary type machines have been generally used as small management machines for inter-tillage, weeding, etc. Due to the vibration of the aircraft, the operator is easily fatigued, and the aircraft is relatively heavy, making it inconvenient to carry.

The present invention was made in view of the above circumstances, and
A tilling claw has a vertical blade part and a horizontal blade part on a tilling claw mounting plate provided perpendicularly to the left and right rotational axes that are inclined backward and parallel to each other, and rotate in a counterclockwise direction and a clockwise direction. The object of the present invention is to provide a small-sized tailor equipped with a vertical tilling claw that is attached to the tiller and does not have the above-mentioned drawbacks.

The present invention will be described below with reference to one embodiment thereof.

In FIG. 1, the small-sized tailor having vertical tilling claws of the present invention is composed of a steering section 1, a power transmission section 2, and a tilling section 3, and a rotating shaft to which power from an engine of the power transmission section 2 is transmitted. The tilling work and the movement of the machine are performed simultaneously by the tilling section 3 which rotates at the same time.

The operating section 1 is constructed by inserting and fixing the base end of the handle 11 into a hole provided in a gear housing 21 of the power transmitting section 2, which will be described later.

Further, as shown in FIGS. 2, 3, and 4, the power transmission section includes an engine 23 attached to the gear housing 21 via a flange 22 provided so as to protrude upward.
A worm wheel 24 that is pivotally supported vertically in the gear housing 21, a worm wheel 25 that engages with the worm and is pivotally supported horizontally in the gear housing 21, and a worm wheel 25 on both sides of the wheel. Via bevel gears 26, 26 that rotate together and bevel gears 27, 27 that mesh with these bevel gears, it is pivotally supported in the vertical direction by the gear housing 21, and is attached to a downward protrusion from the gear housing 21. It is configured to be transmitted to left and right rotating shafts 29, 29 having splines 28, 28.

In addition, the tilling section 3, as shown in FIGS. 2 and 3,
Bosses 31, 31, into which the splines 28, 28 of the left and right parallel rotating shafts 29, 29 fit, are fixed at the center, and convex portions 3 are provided alternately on the outer periphery.
2. The recesses 33 are arranged so as to engage with each other,
In addition, each of the grooved tilling claws is vertically installed at the lower part of the convex portion 32 of the left and right substantially horizontal tilling claw mounting plates 34, 34, which rotate counterclockwise and clockwise, respectively, as shown by arrows A and A'. A tilling claw 36 is attached to the mounting seat 35,
The base 37 of 36 is inserted into the groove, and then fixed by appropriate means such as bolts and hung vertically.

As shown in FIGS. 2, 5 and 6, the tilling claws 36 are connected to the base portions 37, 37 and the rotating shaft 2.
Along the virtual cylinders A and A with 9 and 29 as the axes, and along the arrows A and A of the left and right tilling claw mounting plates 34 and 34,
The vertical blade portions 38, 38 are provided so as to be curved rearward in the counterclockwise direction and the clockwise direction of rotation shown by A', and the virtual cylinder A It has a so-called rake angle β which is curved outward and inclined so that the rear part is higher than the front part in the rotation direction shown by arrows A' and A on the front side of the left and right tilling claw attachment plates 34, 34. The horizontal blade portion 39, 3 extends to the rear of the top.
9.

In addition, in the above embodiment, the tilling claw attachment plate 3
4, two are arranged side by side on the left and right, and a convex portion 32 is provided on the outer periphery of the convex portion 32,
Although the recesses 33 are provided alternately so as to engage with each other, the shape of the recesses 33 may be selected as appropriate and the recesses 33 may be spaced apart from each other.

Since the present invention is configured as described above,
For example, when cultivating flat land, when the handle 11 is gripped and the rotating shafts 29, 29 are oriented vertically and the engine 23 is started, the worm 24,
Worm wheel 25, bevel gears 26 on both sides thereof,
26, bevel gears 27, 27, and the left and right tilling claw mounting plates 34, 34 are attached to the left and right tilling claw mounting plates 34, 34 via the vertically supported rotary shafts 29, 29, along with the tilling claws 36, 36, which are respectively vertically supported. It rotates counterclockwise and clockwise as indicated by A and A', and the vertical blade part 38 makes cuts in the soil, and the horizontal blade part 39 discharges the soil outward.

After the plurality of tilling claws 36 have plowed the land to a predetermined level, when the handle 11 is pushed downward to position the tilling claws 36 located on the front side of the machine body on the uncultivated land side, the rotating shaft 29 is moved rearward to a horizontal plane. The left and right tilling claw mounting plates 34, 34 also rotate rearward while tilting at an angle α, and the tilling claws 36, which are vertically disposed on the plates, rotate with the vertical blade. The section 38 makes a cut in the soil, and the horizontal blade section 39 tills and releases the soil outward.

By the way, as mentioned above, when the left and right tilling claw mounting plates 34, 34 are rotated counterclockwise or clockwise as shown by arrows A and A', the tilling claws 36, 36 attached to these plates are used to till the soil. However, at that time, the side blade part 3 where the greatest resistance or reaction force is applied
Reference numerals 9 and 39 indicate rake angles that are inclined so that the rear portions are higher than the front portions in the rotational direction at the front side portions C and C′ on the center line in the longitudinal direction of the mounting plates 34 and 34, in other words, during work. The scooping angle θ is the rotation axis 2
In a coordinate system that rotates at the same rotation speed as 9, the horizontal blade has a sine curve shape as shown in FIG. Since it changes in a sine curve shape as , D' have the same β as that in the front parts C, C', and further decrease as they rotate forward, and at B and B', which have rotated 270°, the minimum value β-(90°-α) is obtained. , Further, as it rotates forward, it gradually increases and changes to return to the original scooping angle β at the original position C and C′ rotated by 360°.

In this way, each side blade part 3 of the tilling claw 36 rotates while changing the scooping angle θ during work.
The resistance and therefore the reaction force applied to the blade portions 39, 39 are related to the magnitude of the rake angle θ of the working portion of the blade portions.
However, the scooping angle θ while rotating from front to back bites downward into the ground.
The resistance received between D and C' and A' and D', as well as the forward reaction forces F ₁ and F ₁ , is caused by the rake angle gradually becoming smaller while rotating from backward to forward, and the forces C and C at the original position again. The resistance received at points ni~ro, ni _' ~ro'~c _' , which returns to the rake angle at are the horizontal blade portions 39, respectively.
is maximum near the above-mentioned A and A' moving in the front-back direction, and is minimum near the above-mentioned B and B'.

To further discuss this point in the case where the relationship β>90°−α holds true, when the horizontal blade portion 39 is located at the above-mentioned positions A and A′, the scooping angle θA with respect to the horizontal plane is as shown in FIG. At the maximum value above, the height of the rear end of the blade relative to the tip is h a, and when it is located at the above b and b', the scooping angle θ b with respect to the horizontal plane is the minimum value above. In terms of value, the height of the rear end of the blade portion 39 relative to the tip is hb, and since θa>θb as described above, naturally ha>hb.

Therefore, the resistance applied from the rear to the horizontal blade portion 39 at points A and A' is greater than the resistance applied from the front to the horizontal blade portion 39 at points B and B'.
9, the forward reaction force received from the soil in A and A' above, that is, the forward thrust, is the same as B and B' above.
It is greater than the rearward reaction force, that is, the rearward thrust, received from the soil.

Therefore, the tilling claws 36, 36 have horizontal blade portions 39,
The forward reaction forces F ₁ , F 1 received while the 39 rotates from front to rear as H-A-N, H'-A'-N _' , and N-RO-HA, N'- The backward reaction force received while rotating from back to front
The thrust force F is received by the difference between F ₂ and F ₂ , and this thrust F is applied to the tilling claw mounting plate 3.
Attach a plurality of tilling claws 36, 36 to 4, 34,
Moreover, when this is rotated at high speed, it becomes continuously more powerful.

Moreover, the horizontal blade portion 3 is
The rotational trajectories of the blades 9 and 39 may overlap with each other, making the reaction force _F2 even smaller. Because they rotate in opposite directions, their directions are almost opposite, and their sizes are almost equal, so they balance each other out and cancel each other out, so in the end, each tiller attached to the left and right tiller claw mounting plates 34, 34 The pawl 36 obtains a large thrust force F ₁ due to the forward reaction force received while the horizontal blade portion 39 rotates from the front to the rear.

Therefore, when the left and right tilling claw mounting plates 34, 34 are rotated counterclockwise and clockwise, respectively, the aircraft will generate a forward thrust of 2F at the intermediate portion of the rotating shafts 29, 29, that is, approximately on the center line of the aircraft. It is possible to move forward smoothly without shaking from side to side as a result of continuous impact.

In the above embodiment, two tilling claw mounting plates 34 are arranged in parallel on the left and right, but multiple sets of these may be arranged in parallel, and the center of gravity of the aircraft is located at the point where the forward thrust is combined. They may be located in an odd number.

Further, the rotating shaft 29 may be arranged in the body so as to be always tilted backward.

In addition, in the present invention, since the tiller can move the machine forward while performing tillage work, there is no need to provide a separate traveling device to the machine.
Therefore, the structure becomes extremely simple and compact. Furthermore, since the tiller claws are always in contact with the soil during tillage, unlike conventional rotary type ones, they do not receive particular impact force when tilling hard soil during management work such as inter-tilling or weeding. Without,
Therefore, the disadvantages of the machine body vibrating and causing worker fatigue are eliminated, and the power transmission parts are very compactly assembled in one place, so the machine structure is extremely simple, lightweight, and portable. It has the remarkable effect of making it convenient for people.

[Brief explanation of the drawing]

Fig. 1 is a perspective view of the present invention, Fig. 2 is a perspective view showing each main part, Figs. 3 and 4 are longitudinal sectional views of the power transmission section,
Figures 5 and 6 are perspective views of the tilling claw, Figure 7 is a diagram showing the working state of the present invention, Figure 8 is an explanatory diagram showing changes in the rake angle of the horizontal blade, and Figures 9 and 10 are views of the tiller. It is an explanatory diagram of the invention. DESCRIPTION OF SYMBOLS 1... Control part, 11... Handle, 2... Power transmission part, 21... Gear housing, 22... Flange, 2
3... Engine, 24... Worm, 25... Worm wheel, 26, 27... Bevel gear, 28...
... Spline, 29 ... Rotating shaft, 3 ... Cultivating section,
31... Boss, 32... Convex portion, 33... Concave portion, 3
4...Tilling claw mounting plate, 35...Tilling claw mounting seat, 3
6... Cultivating claw, 37... Base, 38... Vertical blade part,
39...Horizontal blade part.

Claims (1)

[Claims] 1. On the left and right rotational axes that tilt backward and are parallel to each other,
A plurality of tilling claws are attached to a tilling claw mounting plate which is orthogonal to each other and is provided to rotate in a counterclockwise direction and a clockwise direction. A vertical blade part along an imaginary cylinder with the axis as the axis, and a vertical blade part extending below the vertical blade part, curved outward of the imaginary cylinder, and on the front side of the tilling claw mounting plate in the rotation direction thereof. The blade is formed by a horizontal blade part with a rake angle that is inclined so that the rear part is higher than the part, and is configured so that the machine body travels by the forward thrust applied to the tilling claws by rotation of each of the mounting plates. A small tailor with vertical tilling claws.