ELECTRICAL MACHINE, IN PARTICULAR PUMP UNIT Russian patent published in 2015 - IPC F16C27/04 F16C35/77 H02K7/00 H02K7/14 

FIELD: electricity.

SUBSTANCE: invention is referred to an electrical machine (1) comprised of a housing (7), stator (11) and rotor (10) installed at the motor shaft (4), which is supported at non-driven side in bearing assembly (14), which contains a set of ball bearings (21, 22) and placed inside the machine housing (7) in radially elastic way with potential insignificant shifting. The bearing assembly (14) comprises a bushing (23), which covers the set of ball bearings (21, 22) and an elastic element (24) whereat the bushing (23) is placed in radially elastic way so that it could be shifted in axial direction. The motor shaft (4) is output from the machine housing (7) at drive side without bearing; it passes up to the connection point (12) wherein there is a set disk (9) for rigid connection of the motor shaft (4) with shaft (5) of the working machine (2). The bearing assembly (14) comprises single-side inner locking ring (30) for axial fixation of the inner ring (22b) of the bearing adjacent to the set of ball bearings (21, 22), at that the inner locking ring (30) with its outer edge (31) is placed inside a circular groove (32), which is made at the cylindrical side of the shaft end extension (13) from the side of the bearing of the motor shaft (4).

EFFECT: manufacture of the electrical machine, which is improved, in particular, in regard to the shaft installation and may be connected in easy and reliable way to the working machine, in particular, to a hydraulic pump.

10 cl, 3 dwg