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1. (WO2018038676) ROTATOR ARRANGEMENT

Pub. No.:    WO/2018/038676    International Application No.:    PCT/SE2017/050861
Publication Date: Fri Mar 02 00:59:59 CET 2018 International Filing Date: Tue Aug 29 01:59:59 CEST 2017
IPC: B66C 3/00
B66C 13/08
E02F 3/36
Applicants: INDEXATOR ROTATOR SYSTEMS AB
Inventors: HARR, Joakim
Title: ROTATOR ARRANGEMENT
Abstract:
The invention relates to a rotator arrangement (10) for providing a rotating movement between a crane arm or the like and a hydraulic tool, the rotator arrangement comprising: a first attachment piece (15) arranged to be attached to the crane arm or the like, a second attachment piece (16) arranged to be attached to the tool implement, a casing (20) joining the first attachment piece (15) to the second attachment piece (16), which casing (20) is arranged to carry the loads of the hydraulic tool and includes a bearing (18) or the like allowing a first part of the casing to rotate with respect to a second part of the casing, and a hydraulic rotation motor (11) arranged to provide a rotational movement between the first and second attachment pieces (15,16) around an axis of rotation (A), the motor comprising a stator (13) and a rotor (12), the rotor (12) being arranged inside the stator so as to rotate with respect to the stator (13) around the same axis of rotation (A) as the first and second attachment pieces. Hydraulic couplings (31) to provide the hydraulic tool with hydraulic fluid are arranged facing the first attachment piece (15) and substantially parallel to the axis of rotation (A) via or through the rotor (12) of the motor (11), the rotor (12) being arranged inside said casing (20).