JPH0454724Y2 - - Google Patents

Description

[Detailed Description of the Invention] (Field of Industrial Application) The present invention relates to a resistance rod for ensuring the straightness and running performance of a power tiller.

(Prior Art) A power tiller is equipped with coaxial wheels and rotors on the left and right sides of the main body, and cultivates farmland using the rotor, which is equipped with claws and blades provided inside the wheels and spaced apart in the axial direction.

Since such power tillers are equipped with a reduction case in the center of the machine in the width direction, it is not possible to install a rotor in this part, and the tilling part remains in the center when moving for tilling work. Plowing work is carried out while holding the aircraft by gripping the handle,
A rod-shaped resistance rod is installed hanging down at the rear center in the width direction of the fuselage, and the handle is pressed down from above to make the resistance rod dig into the cultivated land, thereby improving the rotor's penetration into the cultivated land, straightness, and running performance. secure.

(Problems to be Solved by the Invention) In the above conventional technology, since the resistance rod is rod-shaped, the amount of biting tends to increase, and since it does not roll, the resistance increases and it is difficult to operate.

Therefore, it has been proposed in Utility Model Publication No. 40-13629 that instead of the resistance rod, rotating wheels are provided on the left and right in the center of the width direction and spaced apart in the axial direction. Being provided in the center does not necessarily provide a good function for guiding straightness, and since there are two rotating wheels on the left and right, there are many parts and the support structure is complicated.

The present invention was developed in view of the above, and its purpose is to provide a resistance rod for a power tiller that ensures straight forward movement, allows efficient tilling work, and has a simple structure. be.

(Means for solving the problem) A means for solving the above problem is to provide an engine on the fuselage, a drive shaft suspended horizontally under the fuselage in the width direction, and a tiller on the drive shaft. In a drive-type cultivator that is equipped with a plurality of rotors spaced apart in the axial direction and a handle, a support rod is suspended at the center in the width direction at the rear of the machine body, and the support rod is provided with a bifurcated support part, and the above-mentioned The support part rotatably supports a rolling wheel consisting of a plurality of radially arranged pieces via a support shaft, and each tip of the plurality of radially arranged pieces constituting the said rolling wheel is This is a resistance rod for a tiller that is curved forward in the direction of rotation to form a tiller blade.

(Effect of the above means) According to the above means, there is one rolling wheel forming a resistance rod at the center in the width direction, and this wheel is composed of radial pieces and curves in the rotation direction, so that resistance against the cultivated land is exerted. This ensures straight running at a single point in the center, and allows you to press down on the handle to minimize resistance while still plowing.

(Embodiment) Next, a preferred embodiment of the present invention will be described in detail with reference to the accompanying drawings.

FIG. 1 is a side view of the tiller, FIG. 2 is an enlarged vertical sectional front view of the wheels, and FIG. 3 is a perspective view of the tiller.

The tiller 1 is equipped with an engine 3 mounted on a fuselage 2, and its upper part is covered with a cover 4. A recoil starter knob 5 protrudes from a part of this in the embodiment, and a guard pipe 6 is provided at the front of the fuselage 2. The reduction case 7 is protruded so as to be tilted forward and upward, and a reduction case 7 is provided in a downwardly protruding manner at the center of the width direction of the body 2 . A drive shaft 8 is disposed horizontally at the bottom of the case 7 in the width direction of the machine body, and the shaft 8 is rotationally driven by the transmission mechanism of the reduction case 7 via the engine 3.

In the embodiment, disc-shaped guard plates 9, 9 are fixed to both ends of the drive shaft 8, and a tilling rotor 10 is fixed on the inner shaft of the guard plate 9, for example, in a radial manner and by twisting each piece. In the embodiment, two 10 were provided on each side with the reduction case 7 sandwiched therebetween.
A handle post 11 extends rearward and upward at the rear of the center of the body 2, and the handle post 11 is tilted forward and upward, and its tip is connected to the lower part of the reduction case, and is mounted and supported at two points on the case and the body. The base of a substantially V-shaped handle 12 that tilts rearward and upward is mounted and supported on the upper part of the handle post 11, and operating levers 13 and the like are provided on the left and right handlebars 12a, 12a.

A substantially inverted L-shaped support rod 14 is provided at the widthwise central portion of the rear portion of the fuselage 2 so as to extend downwardly and downwardly.
The support rod 14 has a horizontal base 14a extending rearward from the fuselage, and an intermediate portion 14b extending from the rear end of the base 14a.
The lower part 14c is bent at 90 degrees and hangs down from the lower end of the intermediate part 14b in a bifurcated inverted U-shape. The wheel 16 is rotatably supported horizontally, and the upper half of the wheel 15 faces between the pieces 14d, 14d. The wheel 15 is formed of four pieces 15a arranged radially at 90° intervals, and the edge 15b at the tip of each piece 15a in the rotation direction is curved to form a tilling blade.
The rear edge 15c is formed in a straight line, and in the embodiment, two pieces 15d and 15e intersect at right angles, one intersecting part is recessed 15f, and the other intersecting part 15g is formed.
were fitted here and integrated by welding, but a single steel plate may also be press-formed.

In the above, tilling work is performed by rotating the rotor 10 in the counterclockwise direction in FIG. 1, and at this time, the handle 12 is pushed down to cause the lower end of the wheel 15 to bite into the cultivated land. Since the tilling blade formed by the curved part 15b at the tip of the radial piece 15a of the wheel 15 touches the ground and moves backward, there is little resistance, and the guiding grip action by biting into the ground is reliable. It ensures straight-line performance, and since the rolling wheels are single-piece, it exhibits stable straight-line guiding performance.
Since there is only one wheel, the direction can be easily changed using this wheel as a fulcrum, and since the wheel is located in the center, it is possible to till the remaining part of the reduction case area.

(Effects of the invention) As is clear from the above, according to the invention, the tilling blade, which is made up of the curved tip of the radial piece constituting the wheel, is in contact with the ground, and the guiding grip action by biting into the ground is also reliable. There is little resistance when moving backwards, ensuring straight-line stability of the tiller, and since the curved part of the tip of the radial piece is in contact with the ground, it is easier to change direction. Since the ground is tilled with the curved tilling blade at the tip of the piece, it is advantageous in terms of removing leftover tillage.Furthermore, since the curved part of the piece is in contact with the ground, it is possible to perform smooth tilling work with less resistance. Assemble the pieces in an X shape, etc.
Since the wheels can be constructed by intersecting plates, the structure is simple with fewer parts.

[Brief explanation of drawings]

The drawings show one embodiment of the present invention, and FIG. 1 is a side view of the tiller, FIG. 2 is an enlarged sectional front view of the wheels, and FIG. 3 is a perspective view of the tiller. In the drawings, 1 is a tiller, 2 is a machine body, 12 is a handle, 14 is a support rod, and 15 is a wheel.

Claims (1)

[Claims for Utility Model Registration] An engine is provided on the machine body, a drive shaft is provided below the machine body in the width direction, a plurality of rotors for tillage are provided on the drive shaft spaced apart in the axial direction, and a handle is provided. In a drive-type cultivator equipped with the following, a support rod hangs down at the center in the width direction at the rear of the machine body, the support rod is provided with a bifurcated support part, and the support rod is radially arranged via a support shaft. A rotary wheel made up of a plurality of pieces is rotatably supported, and each tip of the plurality of radially arranged pieces constituting the wheel forms a tilling blade curved forward in the direction of rotation. A resistance rod for a power tiller featuring: