Adjustable-width attachment for agricultural machines

In a moveable support for an attachment for an agricultural machine, which is equipped with supporting wheels for support on the ground and which are rotatably mounted on carrying arms, the improvement comprising:

• means for rotatably and pivotably mounting each carrying arm including a double pivot bearing which comprises at least one stationary as well as horizontal journal, a bearing bush pivotably mounted on the journal, a bearing pin directly connected to the bearing bush and pivotable about a center longitudinal axis of the journal, a longitudinal axis of the bearing pin being generally perpendicular to the center longitudinal axis of the journal, means for pivotably mounting the carrying arm on the bearing pin, said double pivot bearing being pivotable around two axes which are perpendicular to each other, the attachment being so constructed and arranged that the supporting wheels are first pivoted using the double pivot bearing into a free space in proximity with the attachment and subsequently pivoted using the double pivot bearing about the axis perpendicular thereto in order to bring the supporting wheels out of contact with a portion of ground.

A moveable support for an attachment for an agricultural machine, the moveable support having a supporting wheel which engages the ground in an operative position and is rotatably mounted on a carrying arm, the improvement comprising:

• pivot bearing means at a lateral end of the attachment and upon which the carrying arm is pivotally mounted for pivoting around two axes which are perpendicular to each other, the pivot bearing means having a substantially horizontal and stationary journal a bearing bush pivotally mounted on the journal, a bearing pin directly connected to the bearing bush and pivotal about a center longitudinal axis of the journal, a longitudinal axis of the bearing pin being generally perpendicular to the center longitudinal axis of the journal, means for pivotally mounting the carrying arm on the bearing pin, the pivot bearing means being so constructed and arranged that the supporting wheels may be first pivoted about one of the axes from the operative position into a free space in proximity to the attachment and subsequently pivoted about the other axis to a position inwardly of the lateral end of the attachment.