| 摘要 |
Device (14) for a load-bearing unit (12) designed to connect the load-bearing unit (12) and a piece (10) supporting the load-bearing unit (12), intended to convey a twist motion on the load-bearing unit (12) relative to the supporting piece (10) in one plane, as well as a pendulum movement in a second plane extending away from the first. The device features a tube or pin-shaped part (36), rotationally positioned relative to the supporting piece (10). Said part (36) supports the load-bearing unit (12) in connection to an end piece, as well as a preferably cylindrical disc-shaped piece (30) at a distance there from, which along with the edge pointed towards the load-bearing unit (12) defines a primary contact plane. The load-bearing unit (12) is designed with a contact (48), defining a second contact plane that runs essentially parallel to the cylindrical piece (30). Two groups of roller-shaped parts (44, 46) are arranged in an intermediate position between the first and second contact planes, one group (46) arranged to make adjustable contact with the first plane and a second group (44) arranged to make adjustable contact with the second plane. A unit (40) is positioned to convey the cylindrical disc-shaped (30) piece a preferably reversible rotational movement, and thereby to rotate or swivel the load-bearing unit (12) arbitrarily relative to the supporting piece (10). The device (14) is best rotationally installed in the supporting piece (10) with at least one piston cylinder (26), preferably hydraulically actuated, designed to convey the device (14), in addition to the connected load-bearing unit (12), a swinging motion in a plane distinct from the plane in which a rotational or swivelling motion is executed.<IMAGE> |
