Device for attaching an agricultural implement to a tractor

Abstract

A device which attaches an agricultural implement (2) to a tractor (1), and in addition, establishes a driving connection between the power take-off shaft of the tractor and the drive of the implement has, for this purpose, a drive unit (8) which includes two bevel gear angle drives (9, 10) arranged one above the other. One of the drives (9, 10) is firmly connected to the drawbar of the implement with the other one connectable to the lower steering arm of the tractor by an attaching stirrup (12). The attaching system allows the tractor and implement to pivot relative to one another around a vertical axis (25), a transverse axis (26) and a longitudinal axis (27). To achieve pivotability relative to the drive unit (8) around the longitudinal axis (27), the attaching stirrup (12) is supported by a sleeve (47) on a flange housing (39) which is arranged coaxially relative to the first connecting journal (20) of the drive unit (39) thereby achieving an improvement in the transmission of towing forces.

We claim: 
     
       1. A device for attaching an agricultural implement to a tractor and for establishing a driving connection between a power take-off shaft of the tractor and a drive or a driveline for driving the implement comprising; a drive unit having first and second drives arranged one above the other, said first drive includes a first connecting journal which, by a driveshaft, is connectable to the power take-off shaft of the tractor;   said second drive arranged above said first drive, said second drive includes a second connecting journal connected to the drive or driveline of the implement, said two connecting journals arranged in planes extending parallel relative to one another, said first and second drives, via a pivot bearing, being pivotable around a pivot axis which is arranged at a right angle relative to the two connecting journals, said pivot enables the tractor and implement to pivot relative to one another around a vertical axis;   drawing means arranged between the second drive and the implement;   an attaching stirrup having two arms adapted for connection with one of two lower steering arms of the tractor and adapted for enabling the implement to be inclined relative to the tractor around a transverse axis;   a tilting bearing enabling the implement to be inclined sideways around a longitudinal axis relative to the tractor, with the longitudinal axis intersecting the transverse axis at a right angle and with the longitudinal axis being formed by the rotational axis of the first connecting journal of the first drive, the transverse axis is offset upwardly from the longitudinal axis towards the second drive and the tilting bearing is formed by a bearing housing supporting the first connecting journal and by a sleeve which is positioned on the bearing housing and forms part of the attaching stirrup.   
     
     
       2. A device according to claim 1, wherein the pivot bearing includes two rolling contact bearings which are centered on the pivot axis and which are arranged at a distance from one another, and the transverse axis is arranged in a plane which extends centrally between the two rolling contact bearings. 
     
     
       3. A device according to claim 1, wherein the sleeve is supported on an outer face of the bearing housing, with bearing bushes arranged therebetween. 
     
     
       4. A device according to claim 3, wherein stop discs are provided which rest against the ends of the sleeve and of the bearing bushes and which serve to provide axial support against stops of the bearing housing. 
     
     
       5. A device according to claim 1, wherein the bearing housing is connected to a housing of the first drive by a flange.