Importance

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Abstract

A grain drill suspension system including a support member comprising a parallelogram link structure and a walking beam member. The walking beam member has furrow cutting discs attached to a front portion thereof and a press wheel attached to a rear portion thereof. The support member includes parallel vertical members and cross links. The walking beam is pivotally connected at a medial portion thereof to a rear vertical member of the parallelogram structure. A front vertical member is attached to a vertically adjustable attachment member associated with the suspension system. A first spring extends upwardly from a rear portion of the walking beam to the rear vertical member biasing the furrow cutting discs downwardly. A second spring cooperates with the front vertical member and the cross links resiliently urging the rear vertical member and walking beam downwardly. The springs, along with the position of the front vertical member, cooperate to determine the depth of the furrow cut by the furrow discs. The parallelogram support structure allows the furrow cutting discs to follow undulating terrain while maintaining a constant desired depth of the furrow.

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First Claim