JPS5876622A - Ditch digger - Google Patents

Abstract

PURPOSE:To improve a work efficiency through smoothing of an earth moving operation during a digging work, by a method wherein, in an equipment which digs a ditch in a ground through rotational driving of an auger with the advance of a working machinery, the auger tilts an axial line so that the lower end thereof moves forward in an advancing direction. CONSTITUTION:A ditch digger 3 is attached to a rear part of a tractor 1 through a 3-point hitch mechanism so that it can elevate, and an auger shaft 5 is turned by a motive power transferred from a PTO shaft 6 at the tractor 1 side through an universely joint 7 to dig a ditch in earth. A spiral cutter 8 is formed on the outer periphery of the auger shaft 5 moving from the lower end to the upper part, earth moving vanes 9 are positioned on the cutter, and an earth moving guide plate 11 is secured to the rear part through a support arm 10 attached to a body case 4. In which case, the auger shaft 5 protrudes from the lower part of the body case 4 in a manner that it is inserted into a ground G and in such a tilting attitude that the lower end points to the tractor 1 side, and a tilting angle of the axial line with a ground surface is set to about 45 deg..

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a trench digging device, and more particularly to a trench digging device that excavates and creates drainage ditches in agricultural fields using an auger that is attached to a working machine such as a tractor and rotates while moving forward.

An auger-type trench digging device is known as a trench digging device used for soil improvement or digging drainage trenches. This excavates the soil by forwardly moving an auger that is rotatably driven in the soil, and a soil discharge guide plate for scooping up the excavated soil is placed close to the rear side in the direction of movement of the auger.

By the way, in such trenching equipment, the rotational axis of the conventional auger is held substantially vertically, and the earth removal guide plate is also held in a substantially vertical position along this axis.

Therefore, not only is there a large driving resistance when a tractor or the like is driven forward to form a groove in the soil, but also the flow direction of the soil is approximately perpendicular to the direction of movement of the tractor or other working machine, so the soil discharge is not effective. It was difficult to perform the trench digging work smoothly, and as a result, the efficiency of trench digging work was reduced.

The present invention has been made to solve the above-mentioned disadvantages, and an object of the present invention is to improve the efficiency of trench digging work by smoothing the earth removal action during trench digging work.

For this purpose, the present invention aims to move the lower end of the auger forward in the direction of travel so that the flow direction of soil removed by the auger and the discharge plate is directed to the rear in the direction of travel rather than the direction perpendicular to the direction of travel of a working machine such as a tractor. It is characterized by having the auger axis tilted towards the target.

DESCRIPTION OF THE PREFERRED EMBODIMENTS The configuration of the present invention will be specifically described below based on an embodiment shown in the drawings.

In FIG. 1, reference numeral 1 denotes a tractor, and a trench digging device 13 is attached to the rear via a three-point pitch mechanism 2 provided at the rear, and the trench digging device 13 can be raised and lowered by operating a control lever (not shown). It is now possible to do so.

The trench digging device 3 is connected to the tractor 1 via the three-point pitch mechanism 2.
A reduction gear mechanism is built into the main body case 4 connected to the main body case 4, and an auger shaft 5, which is attached to the output shaft (not shown) of this reduction gear III, protrudes from the lower part of the main body case 4. The auger shaft 5 is configured to be rotationally driven by the power transmitted from the PTO shaft 6 to the reduction gear mechanism via the universal joint 7.

Here, when the auger shaft 5 is inserted into the soil G, it projects from the lower part of the main body case 4 in an inclined position with its lower end facing the tractor 1 side, and the angle of inclination of its axis with respect to the ground surface is The angle is approximately 45°. A spiral blade 8 is formed on the outer periphery of the part of the auger shaft 5 inserted into the soil G, extending upward from the lower end. Sat II 9 is established. In other words, the base end of the plate-shaped earth removal Wj 49 is fixed to the auger shaft 5 along its axis, and is protruded radially from this base end, so that it excavates into the ground surface as the auger shaft 5 rotates. The discharged soil can be thrown to the side of the trench digging device 3.

An earth discharge guide plate 11 is fixed to the rear of the auger shaft 5 via a support arm 10 attached to the main body case 4. This earth discharge guide plate 11 extends downward in an inclined position approximately along the axis of the auger shaft 5 in front, and is arranged in a circle surrounding the rotation locus of the spiral blade 8 of the auger shaft 5 as shown in FIG. It is formed in an arcuate cross section, and its width is approximately the same as the diameter of the rotation circle of the spiral blade 8. and spiral blade 8
The auger shaft 5 is disposed close to the auger shaft 5 so as to leave a gap of approximately 50 mm between the rotation locus and the auger shaft 5.

With this configuration, when the auger shaft 5 is rotated in the six directions of the arrows by the power from the tractor 1 side, the soil around the auger shaft 5 is moved along the axial direction of the auger shaft 5 due to the action of the spiral blade 8. The soil is excavated upward as shown by arrow B, and the soil is thrown laterally by the soil excavator II9 rotating near the ground surface. When the tractor 1 is driven forward with the auger shaft 5 being rotationally driven in this way, the auger shaft 5
The soil in front of the soil removal guide plate 11 moves backward relative to these as shown by arrow C, and is scraped up by the soil discharge guide plate 11 to create a trench behind it. Ru. At this time, the auger shaft 5 and the soil discharge guide plate 11 are supported with their lower ends tilted forward in the direction of movement of the tractor 1, so that the soil discharge guide plate 11 relatively moves rearward as described above. The raking action is carried out smoothly with less resistance, and the raking direction is carried out along the direction in which the soil is excavated by the rotation of the auger, so the soil removal action by the rotation of the auger is smooth. It will be done.

As explained above, according to the present invention, when excavating a trench by moving a working machine such as a tractor forward while rotating an auger, the removed earth moves backward relative to the progress of the working machine.
The soil removal guide plate gently bends upward and moves, and this movement is performed along the direction in which the soil is excavated by the rotation of the auger, so that the soil discharge action by the rotation of the auger becomes smooth. Therefore, the amount of excavated soil per unit time can be increased, and the efficiency of trench digging work can be improved.

[Brief explanation of the drawing]

FIG. 1 is an overall side view showing an embodiment of the trenching device mounted on a tractor, and FIG. 2 is a sectional view taken along the line 1--2 in FIG. 1...Tractor, 2...3-point hitch mechanism, 3...
Full digging device, 4...Main case, 5...Auger shaft,
6...PTO axis, 7...Universal joint,
8... Spiral blade, 9... Excretion stomach, 10... Support arm, 11... Excretion guide plate.

Claims (1)

[Claims] A main body that is connected to a working machine such as a tractor via a pitch mechanism and has a mission for inputting rotational output taken out from the working machine, and an auger that protrudes from the lower part of the main body and is rotationally driven by the mission. , and a soil discharge guide plate arranged closely along the axis of the auger at the rear of the auger, and the auger is rotatably driven to create a trench in the soil as the working machine moves forward; teeth,
A trench digging device characterized in that its axis is inclined so that its lower end faces forward in the direction of travel.