| 摘要 |
PCT No. PCT/SE89/00482 Sec. 371 Date May 6, 1991 Sec. 102(e) Date May 6, 1991 PCT Filed Sep. 8, 1989 PCT Pub. No. WO90/02849 PCT Pub. Date Mar. 22, 1990.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.
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