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US 8,786,148 B2Granted
Electric motor having support surfaces for maintenance
AssigneeKabushiki Kaisha Toshiba
InventorsNobuyuki Yagi, Satoru Murakami
Life of this patent
Estimating the term…
Abstract
According to one embodiment, an electric motor includes a stator, a rotor, bearings and a rotor shaft, in a frame, supporting surfaces on the rotor, and a plurality of threaded holes in the frame, which are configured to receive bolts for pressing the support surfaces from outside.
Claims16
An electric motor comprising:
- a stator
- a frame supporting the stator;
- a bracket and an end plate configured to close respective ends of the frame;
- a first bearing housing and a second bearing housing respectively retaining bearings, and respectively fixed to the bracket and the end plate from an outside;
- a rotor shaft arranged inside the frame and rotatably supported by the bearings;
- a rotor attached to the rotor shaft and opposing the stator;
- rotor holders attached to the rotor shaft at respective sides of the rotor and respectively including tapered supporting surfaces;
- and
- a plurality of threaded holes for fixing formed respectively in the bracket and the end plate to oppose the tapered supporting surfaces, and into which a supporting member for fixing the rotor that presses the tapered supporting surfaces are configured to be insertable from outside,
- wherein an insertion direction of the supporting member by the plurality of threaded holes for fixing is a same direction as an axial direction of the rotor shaft,
- each tapered supporting surface is inclined with respect to an insertion direction of the supporting member by the plurality of threaded holes for fixing, and
- the supporting member is inserted in the plurality of threaded holes for fixing and presses each of the tapered supporting surfaces.
9 more elements
An electric motor comprising:
- a stator;
- a frame supporting the stator;
- a bracket and an end plate configured to close respective ends of the frame;
- a first bearing housing and a second bearing housing respectively retaining bearings, and respectively fixed to the bracket and the end plate from an outside;
- a rotor shaft arranged inside the frame and rotatably supported by the bearings;
- a rotor attached to the rotor shaft and opposing the stator;
- tapered supporting surfaces on the rotor;
- a plurality of threaded holes formed respectively in the bracket and the end plate to oppose the supporting surfaces, and configured to receive bolts insertable from outside for pressing the supporting surfaces;
- wherein an insertion direction of the bolts by the plurality of threaded holes for fixing is a same direction as an axial direction of the rotor shaft,
- each tapered supporting surface is inclined with respect to an insertion direction of the bolts by the plurality of threaded holes for fixing, and
- the bolts are inserted in the plurality of threaded holes for fixing and press each of the tapered supporting surfaces.
8 more elements
Dependencies are inferred from the claim text.