Soil working device

Abstract

In a mobile soil working device comprising a machine frame (23), a drive for at least one penetration tool (3) adapted for up and down movement, the penetration tool (3) being adapted to be driven into the soil and to be pulled out again, a guide element (4) for at least one penetration tool (3), the guide element being guided movably at the machine frame (23), a tool holder (2) for the penetration tool (3), which is supported for pivotal movement about a first pivot axis (40) in the guide element (4) movable up and down by the drive, so as to allow a pivoting of the penetration tool (3) against a spring force while the tool is in the soil, it is provided that, between the tool holder (2) and the guide element (4), a torsion element (1a, 1b, 1c) is provided coaxially with the first pivot axis (40), which torsion element, under a force effect on the at least one penetration tool (3), allows the tool holder (2) to pivot relative to the guide element (4) and, when the force effect ceases, exerts a restoring moment on the tool holder (2) so that the penetration tool (3) pivots back to the home position after having been pulled from the soil.

Description

BACKGROUND OF THE INVENTION[0001]1. Field of the Invention[0002]The invention refers to a mobile soil working device for creating cavities in the soil.[0003]2. Description of Related Art[0004]Such devices are used to create cavities in soil by means of penetration tools, wherein slot-shaped cavities are formed in the deeper regions of the soil and holes as small as possible are left at the ground surface. The cavities allow for a better drainage of water and improve the aeration of the soil, and the loosening of the soil enhances plant growth, especially of grasses.[0005]The soil working devices heretofore used fur such purposes and known from Japanese Laid-Open Publication No. IP-A-55089538 have support arms arranged in the manner of a parallelogram that are configured like telescopes and each has a spring connected in parallel thereto, respectively, so that the support arms are variable in length against a spring force. One end of the support arms is hinged to the machine frame, a...

AI Technical Summary

Benefits of technology

[0008]It is thus an object of the present invention to provide a device of the above described type, in which fewer machine parts are moved along upon penetration, whereby the working speed can be increased.

Problems solved by technology

The previously known soil working devices are complex structures with many machine parts that are moved along during the penetrating operation.

The mass inertia is therefore relatively high so that the working speed of the devices is limited.

It is another problem that the penetration tools or machine elements of the previously known soil working devices could be damaged in soils holding large stones, for example, when they hit stones or the like upon penetration.

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