Patent ID: 7793739
Filing Date: 2010-09-14
Classification: A01B

Abstract:
1. An overload protection device for agricultural equipment, comprising: a carrier frame and an agricultural tool for working the soil; a joint connecting the agricultural tool to the carrier frame, the joint having two mutually supporting joint parts including a first joint part and a second joint part, a spring arrangement disposed between the carrier frame and the agricultural tool for producing a spring load yieldably positioning the agricultural tool into a working position relative to the carrier frame such that during operation of the agricultural equipment, when the agricultural tool meets an obstacle in the soil acting with force exclusively from the front on the agricultural tool backwards, the agricultural tool swivels backwards in the joint about an axis of the pivot bolt and relative to the carrier frame towards an upper yielded position, wherein the joint is situated between a soil contacting tip of the agricultural tool and an upper end of the agricultural tool, and distant from the upper end, the upper end being linked to the spring arrangement, and wherein the at least one joint retainer of the second part of the joint is supported on the pivot bolt by the spring load of the spring arrangement and has one of a V-shaped or U-shaped cross-section fitting on the pivot bolt, so that when a force from an obstacle in the soil acts on the agricultural tool from a side, the at least one joint retainer lifts up on one side from the pivot bolt or the pivot bolt lifts up from the at least one joint retainer and the agricultural tool yields in the joint to a side in relation to the carrier frame and the working direction.