Cover and base arrangement for an electrical machine

Claim 1

In an electric machine equipped with cable terminals and served by supply lines having a stator 6 including a stator lamination stack 7, a winding 7a supported on said stack, shield-like pressure plates 5 overlapping the stack at respective ends of said stack, and means for holding the stack together; a rotor having a rotor shaft and bearings; and a base and cover arrangement for supporting and protecting said machine, the improvement comprising: a base structure 1 for supporting said stator and said rotor bearings including a frame 2 made of a hollow section, transverse walls 3 enclosed in said frame, said walls extending perpendicular to the direction of the longitudinal axis of said rotor and having a profile corresponding to the shape of said pressure plates; a cover including two side members 11 seated on said frame and a central upper cap 12, said side members each having a mid-portion 13 forming a side wall of said machine and configured to recieve said cable terminals and said supply lines, and end-portions 14 disposed at respective sides of said mid-portion in juxtaposed relationship to adjacent end-portions of said side members so as to form end-face walls of said machine, each two of said juxtaposed end-portions conjointly defining a vertical interface 15 in line with the center line of said rotor shaft and having a composite contour defining an upwardly opening cut-out 17 encompassing said shaft for lifting said stator and said rotor upwardly together, said upper cap having end-face extensions 18 covering corresponding ones of said cut-outs; and elastic sealing means, disposed at the interface of and between said central upper cap and said side members, and having a sound attenuation capability corresponding to the wall thickness of said cover.