Abstract: Arrangement for rotator units, especially those which are intended for rotation of excavator buckets. It comprises a motor (27) which, together with a transmission (26, 29) which is coupled to a drive wheel (24) in the chain transmission, is arranged in a movable support (14), which is suspended in the housing (6) in a pivotable manner, but free from fixed connections to the housing. In the transmission there is a drive wheel (24) for a chain transmission, which wheel is connected by means of a drive chain (25) to a driven chain wheel (13) included in a shaft system (12) mounted in the housing. Spring elements (30) are arranged to pivot the movable support (14) in such a way that the chain is held tensioned. The suspension of the movable support in the housing is designed in such a way that deformations of the housing resulting from external force effect are not transmitted to the movable support in a way that would deform the latter.

Abstract: Arrangement of equipment such as excavator buckets (1) mounted on excavating machines and similar machines, where the equipment is mounted on an attachment (7) provided for fastening to the machine arm by means of a shaft (8) in such a way that the equipment (1) can be rotated in relation to the attachment. The attachment (7) has a spigot (9) which is located eccentrically in relation to the shaft (8). The equipment (1) has a spigot (11) which is located some distance from the said rotating shaft. A first link (18) is swivel-mounted at the spigot (9) on the attachment and a second link (19) is swivel-mounted at the spigot on the equipment. At the ends which are not mounted on the said spigots the links are swivel-mounted to each other.