PROBLEM TO BE SOLVED: To improve maintenance including attaching/detaching a power transmission shaft functioning to transmit mechanical power between the PTO shaft on a tractor and the input shaft on a working implement when constructing an autohitch on a 2P link apparatus.SOLUTION: Concerning a junction mechanism of a tractor for a working implement, hitch frames 10 and 10 are provided which vertically turn relative to the tractor 1 and are integratedly provided with a working implement junction frame 26, and a joint cover 45 attachable to/detachable off the working implement junction frame 26 and fastening vertically turnably on the frame 26 is supportingly furnished with an attaching/detaching transmission 24 composed of a universal joint 22 joining detachably to a PTO shaft 20 on the rear of the tractor 1 and an intermediate shaft 23 joining detachably to the input shaft 21 on the working implement 2 side, wherein for the joint cover 45, the universal joint 22 side is impellingly supported upward by a holding mechanism 30 turnable vertically relative to the hitch frames 10 and 10 or the working implement junction frame 26 and impelled upwardly.COPYRIGHT: (C)2010,JPO&INPIT【課題】2Pリンク装置にオートヒッチを構成する際、トラクタ側PTO軸と作業機側入力軸とを伝動する伝動軸の着脱等メンテナンス性を向上する。【解決手段】トラクタの作業機連結装置において、トラクタ1に対して上下回動するヒッチフレーム10,10を設けこのヒッチフレーム10,10に作業機連結枠26を一体的に設け、該作業機連結枠26に対して着脱自在で上下回動自在に係止するジョイントカバー45に、トラクタ1後部のPTO軸20に着脱自在に連結する自在継手22と作業機2側の入力軸21に着脱自在に連結する中間軸部23とからなる着脱伝動部24を支持して設け、前記ジョイントカバー45を前記ヒッチフレーム10又は作業機連結枠26に対して上下回動自在で且つ上向きに付勢された保持機構30によって自在継手22側を上方に付勢支持した【選択図】 図6
