JPH0427801B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a self-propelled shallow cultivator, and is particularly characterized in that the rotation of the running wheel is intermittently rotated in synchronization with the plowing movement of the plowing blade.

Plowing the soil is generally considered to be an important matter on farms. Plowing is the process of turning the soil upside down and crushing it into suitable granules.This makes the porosity and water retention of the soil suitable for the growth of grass, and also makes it easier to spread fertilizer on the ground surface. It has the effect of exterminating pests by dispersing it underground and exposing the underground soil to the surface. by the way,
In farms where crops are grown in advance, such as tea plantations, the roots of the crops are deep underground in the area to be tilled, so it is not possible to use a rotary blade tiller. A shallow tiller (or intermediate tiller) that plows up the plow by inserting a plowing blade is used (Utility Model Publication No. 57-42242). To give an overview of the shallow cultivator, reference numeral a denotes a chassis, on which a small engine b is mounted, a drive wheel c and a handle d are provided at the rear, and wheels or a bedding holder 1 are installed at the front. installed. The chassis a is equipped with an output shaft 2, to which the rotational force of the engine b is transmitted via a reduction gear 3. A crankshaft 4 is also attached to the output shaft 2, and a crank arm 5 is attached to the crankshaft 4 to form a crank mechanism. A plurality of tilling blades 6 are attached to the tip of the crank arm 5 in a comb shape by means of bolt tightening or the like. Further, a support shaft 7 is attached to a suitable position on the chassis a, and a support arm 8 is installed between the support shaft 7 and the intermediate position of the crank arm 5.
is passed, and thereby the movement locus of the tilling blade 6 is regulated.

By the way, when the crankshaft 4 is rotated, the plowing blade 6 makes a plowing motion while drawing a trajectory as shown in the figure. That is, the tilling blade 6 sticks into the ground at point p, penetrates to point q, and then comes out at point r. Therefore, the part of the ground surrounded by p, q, and r will be plowed up.
However, in reality, the conventional shallow tiller moves at a constant speed even while the tilling blade 6 makes the above-mentioned movement, so the tilling blade itself also moves forward while making a plowing motion. Therefore, if the aircraft moves forward from A to B before the tilling blade 6 inserted into the ground at point p comes out of the ground, the tilling blade 6 is not at point r.
The plow will break out at point r', and only the part of the ground surrounded by p, q', and r' will be plowed, which will significantly reduce the plowing effect.

The present invention solves the above-mentioned drawbacks of the conventional shallow tiller, and the drive wheel c rotates when the tilling blade 6 rises above the ground and stops when it is stuck into the ground. In this way, the plowing blade 6 is made to fully exhibit its plowing action, thereby enhancing the plowing effect.

Hereinafter, the present invention will be specifically explained based on illustrated embodiments.

In the figure, 11 is the chassis, 12 is the engine, 1
3 is a drive wheel, and 14 is a handle. This shallow tiller is similar to the conventional one described above, except that the drive wheel c is rotated intermittently in synchronization with the plowing motion of the tiller blade, and the chassis 11 is equipped with an output shaft 2. The crankshaft 4 is attached to this,
Further, a crank arm 5 is attached to this crankshaft 4 to form a crank mechanism. A plurality of tilling blades 6 are attached to the tip of the crank arm 5. Further, a support shaft 7 is attached to a suitable position on the chassis 11, and this support shaft 7
A support arm 8 is interposed between the crank arm 5 and the intermediate position of the crank arm 5. When the crankshaft 4 rotates once, the rotation is transmitted to the tiller blade 6 via the crank arm 5, the tiller blade 6 performs a plowing operation once, and the support arm 8 rotates the support shaft 7.
Rotate back and forth within a certain range around the center. The rotational force of the shallow tiller constructed in this manner is transmitted to the drive wheel 13 to rotate it intermittently. There are no particular limitations on the rotational power transmission mechanism. In short, when the output shaft 2 makes one revolution, the drive shaft 13
It is sufficient if the rotation is made once at intervals.

The system shown in FIG. 2 transmits the reciprocating rotation of the support arm 8 to the axle 9 of the drive wheel 13,
3 is rotated intermittently, a ratchet 10 is attached to the axle 9, a connecting rod 15 is provided protruding from the support arm 8, and the connecting rod 15 and the ratchet 10 are connected by a traveling arm 16. Link. Then, a crank mechanism is formed between the ratchet 10 and the connecting rod 15, and the reciprocating motion of the support arm 8 is transmitted to the ratchet 10 via the traveling arm 16, causing it to reciprocate. Of course, since it is necessary for a shallow tiller not only to move forward but also to move backward, it is important that the ratchet 10 is capable of switching the direction of rotation, and is equipped with a forward/reverse switching knob 17 for example. Use what you have.

In FIG. 3, a crankshaft 18 is attached to the output shaft 2 instead of the connecting rod 15, and the crankshaft 18 and the ratchet 10 are connected by a traveling arm 16 to transmit the turning motion of the crankshaft 18 to the ratchet 10.
The axle 9 is rotated intermittently, and other than that, there is no difference from the one shown in FIG.

As described in detail above, the present invention provides a shallow tillage machine for farmland equipped with a tillage blade, in which the power transmission mechanism for the drive wheel is an interval transmission mechanism, and its rotation is synchronized with the plowing motion of the tillage blade. While the tilling blade is stuck into the ground, it stops rotating, and when the tilling blade is on the ground and under no load, it rotates to move the machine forward. Therefore, with one plowing motion, the plowing blade can plow back and forth over a wider range than if the machine were to move continuously, increasing work efficiency.
In addition, the figure shows an example in which the handle 14 is attached not to the chassis 11 but to the drive wheel 13. In this way, the vibrations transmitted from the chassis 11 to the handle 14 during plowing work are extremely reduced, so there is an advantage that the operator does not have to bear the burden of vibrations.

[Brief explanation of drawings]

FIG. 1 is a side view showing a conventional shallow cultivator for farming, FIG. 2 is a side view showing one embodiment of the present invention, and FIG. 3 is a side view showing another embodiment. 1... Grass presser, 2... Output shaft, 3... Reducer, 4... Crank shaft, 5... Crank arm,
6... Plowing blade, 7... Support shaft, 8... Support arm, 9... Axle, 10... Ratchet, 11
... Chassis, 12 ... Engine, 13 ... Drive wheel, 14 ... Handle, 15 ... Connection rod, 16 ...
...Traveling arm, 17...Forward/reverse switching knob, 18
...crankshaft.

Claims (1)

[Claims] 1. A crankshaft 4 is attached to the output shaft, a crank arm is connected to this, a tilling blade is attached to the tip of the crank arm, and a support arm is provided between a point on the chassis and an intermediate position of the crank arm. In the shallow tillage machine for agricultural use, the rotary motion of the output shaft is transmitted to the drive wheel via an intermittent rotational power transmission mechanism, and when the tillage blade is penetrated into the ground, the rotation of the drive wheel is stopped,
A shallow tillage machine for agricultural use, characterized in that a drive wheel is rotated by a certain amount when a tillage blade is on the ground. 2. Attach the crankshaft 18 to the output shaft, attach a ratchet to the axle of the drive wheel, and connect the two via a traveling arm to form a crank mechanism, thereby intermittently transmitting the rotational power of the output shaft to the drive wheels. A shallow cultivator for farmland according to claim 1, characterized in that it is configured as follows. 3 A connecting rod is attached to the support shaft, a ratchet is attached to the axle of the drive wheel, and the two are connected via a traveling arm to form a crank mechanism, so that the reciprocating rotational movement of the support shaft is intermittently transmitted to the drive wheel. A shallow cultivator for farmland according to claim 1, characterized in that: