JPH025Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a gauge wheel device for a rotary tiller.

It is known that a rotary tiller connected to a tractor so as to be able to rise and fall is provided with caster type gauge wheel devices at both left and right ends of the rear part thereof.

Conventionally, in this type of device, the center of gravity of the gauge wheel is approximately at the center of the caster shaft, so when the rotary tiller is raised, the gauge wheel opens outward to the left and right, causing the gauge wheel to protrude outward. , it was dangerous to drive on the road.

Therefore, the present invention was devised in view of the above problems, and the gauge wheel is rotated inward to the left and right when the rotary power tiller is raised, so that the gauge wheel does not protrude outward. An object of the present invention is to provide a gauge wheel device for a rotary tiller which prevents danger when running on the road. Therefore, the feature is that a stay that can rotate around the vertical axis is provided at both left and right ends of the rear of the rotary tiller, which is connected to a tractor so that it can be raised and lowered. In a caster type gauge wheel device that extends downward in a direction gradually separating from the vertical axis center and is provided with a gauge wheel rotatable around a horizontal axis at the lower end of the stay, the inner side of the stay The gauge wheel is located at the point where the gauge wheel is rotatably supported in a vertical position, and the center of gravity of the aggregate members below the stay, including the gauge wheel, is located inside the vertical axis. .

Hereinafter, embodiments of the present invention will be described in detail based on the drawings.

In FIG. 1, 1 is the body of the tractor, and 2 is the rear wheel. A rotary tiller 6 is connected to the rear end of the tractor body 1 via a three-point link mechanism 5 consisting of a top link 3 and a pair of left and right lower links 4. The lower link 4 is connected to a lift arm 9 of a hydraulic system 8 mounted on the upper part of the tractor body 1 via a lift rod 7, and when the lift arm 9 rotates in the direction of arrow a in the figure, the lower link 4 swings up and down, and thereby the rotary tiller 6 becomes movable up and down in the direction of arrow b.

The rotary tiller 6 has a tilling section 11 consisting of rotatable tilling claws 10, and behind the tilling section 11,
Gauge wheel device 1 for adjusting tilling depth of tilling section 11
2 is provided.

The gauge wheel device 12 includes a pair of left and right support cylinders 14 provided at both left and right ends of the rear end of the machine frame 13 of the rotary tiller 6 in a vertical axis posture, and a support cylinder 14 that is vertically adjustable. A caster support shaft 15 in a vertical axis posture inserted through the caster support shaft 15, a stay 17 provided at the lower end of the caster support shaft 15 so as to be rotatable around the vertical axis 16,
a horizontal support shaft 18 provided at the lower end of the stay 17;
A gauge wheel 19 rotatably provided on the horizontal support shaft 18
It is mainly composed of. The stay 17 is the first
As shown in the figure, the stay 17 extends downward from the bending part of the middle part in a direction gradually separating from the vertical axis 16, that is, diagonally downward and rearward.
A horizontal support shaft 18 having a horizontal axis is provided at the lower end. As shown in FIG. 2, a gauge wheel 19 is rotatably supported on this horizontal support shaft 18 in a vertical position. Here, the vertical axis 16 around which the stay 17 is rotated and the horizontal axis around which the gauge wheel 19 is supported are separated from each other in the front-rear direction.

As shown in FIG. 2, the stay 17 has a vertical axis 16
The gauge wheel 19 bulges further outward, and is located inside the stay 17, and the center of gravity 20 of the gauge wheel 19 is located inside the vertical axis 16. The weight of the gauge wheel 19 alone and the weight of the stay 17 alone are such that the gauge wheel 19 alone is heavier.

According to the embodiment of the present invention having the above configuration, when the rotary tiller 6 is raised as shown by the imaginary line in FIG. 1, the gauge wheel 19 rotates inward as shown in FIG. 3 as well. That is, the center of gravity 20 of the gauge wheel 19 is located inside the vertical axis 16, and the stay 17
Since the weight of the gauge wheel 19 is heavier, the gauge wheel 19 is rotated to be located below the stay 17. Therefore, the gauge wheel 19 does not protrude outward from the left and right sides of the rotary tiller 6. That is, stay 1
7 is bent backward in the middle as shown by the solid line in Figure 1, so if it turns inward, the bending direction will be inward as shown by the imaginary line in Figure 1 and Figure 3. Therefore, the gauge wheel 19 will no longer protrude outward.

As a means for rotating the stay 17 inward in this way, it is also possible to position the stay 17 inside the gauge wheel 19 and configure the center of gravity to be inside the vertical axis 16. It scrapes the mounds of soil on previously cultivated land, resulting in a poor finish. In contrast, in the embodiment of the present invention, as shown in FIG. 2, the stay 17 does not come into contact with the cultivated land 21, and the gauge wheel 19 is rotated in a vertical position, resulting in a good finish. .

What is shown in FIG. 4 is another embodiment of the present invention, in which the longitudinal axis 16 and the operating axis 22 of the gauge wheel 19 are aligned, but only the center of gravity 20 is located at the longitudinal axis 16.
It is configured to be located more inward. That is,
The gauge wheel 19 is configured to be heavier on the inside. In this way, if the vertical axis 16 and the rolling axis 22 of the gauge wheel 19 are aligned, the gauge wheel 19 will move stably in a straight line during tilling work, but as shown in FIG. The axis 16 and the working axis 22 are eccentric S
If you do so, a moment will be generated and there is a risk of meandering.

Therefore, as shown in FIG. 4, it is preferable that only the overall center of gravity of the members below the stay 17 is unevenly distributed inward.

Note that the present invention is not limited to the above embodiments.

According to the present invention, the structure is extremely simple, the gauge wheel can be housed inside, and safety can be ensured when driving on the road, and a good finish can be expected during plowing work.

[Brief explanation of the drawing]

FIG. 1 is a side view showing an embodiment of the present invention, FIG. 2 is a rear view of the same, FIG. 3 is a rear view when raised, and FIG. 4 is a sectional view showing another embodiment of the present invention. 6... Rotary tiller, 16... Vertical axis, 17
...stay, 19...gauge wheel, 20...center of gravity.

Claims (1)

[Scope of utility model registration request] A rotary power tiller that is connected to a tractor so as to be able to rise and fall is provided with a stay that is rotatable around a vertical axis at both left and right ends of the rear part of the rotary tiller, and the stay is rotated downward from a bent part in the middle and from the vertical axis. In a caster type gauge wheel device, in which a gauge wheel is provided at the lower end of the stay and is extended in a direction that gradually separates from each other, and is rotatable around a horizontal axis, the gauge wheel is located inside the stay, and the gauge wheel is provided at the lower end of the stay. A gauge wheel device for a rotary tiller, characterized in that the wheel is rotatably supported in a vertical orientation, and the center of gravity of the assembled members below the stay, including the gauge wheel, is located inside the vertical axis.