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US 4,074,159 AGranted
Dynamo-electric machine
OwnerRussell O. Robisoninventor
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OwnerRussell O. Robisoninventor
Estimating the term…
An improved dynamo-electric machine such as an electric motor is disclosed including a novel commutator configuration and novel means for aligning a first machine housing relative to a second machine housing. The commutator includes an insulating member having a first and a second end with an outwardly extending member having a plurality of apertures therein extending from the first end of the insulating member. A recess extends partially through the insulating member from the second end of the insulating member. A plurality of electrically conducting members each having a first and a second mounting portion are established about a substantially cylindrical surface of the insulating member with the first mounting portions of the electrically conducting members extending through the apertures in the insulating member. The remaining portions of the first mounting members are bent radially outwardly to provide mounting terminals for connection with the rotor coils. The second mounting portions of the electrically conducting members are bent radially inwardly to engage the recess in the second end of the insulating member to secure the electrically conducting members to the insulating member. The machine includes a permanent magnet having a substantially cylindrical outer surface which is in frictional engagement with the internal diameter of the first machine housing with a portion of the permanent magnet extending from the first machine housing. The second machine housing is aligned relative to the first machine housing by a frictional engagement with the portion of the permanent magnet extending from the first machine housing. The foregoing abstract is merely a resume of one general application, is not a complete discussion of all principles of operation or applications, and is not to be construed as a limitation on the scope of the claimed subject matter.
In a dynamo-electric machine having housing means, a rotor within the housing, the rotor housing laminations and coil means carried by and rotatable with the rotor, and a cylindrical permanent magnet within the housing and radially outwardly of the laminations and coin means in functional cooperation with the said laminations and coil means, the improvement of said housing means comprising a first and a second shell-like housing having facing open ends and axially aligned cylindrical walls abutted together at said open ends to enclose said rotor, said housings being of plastic material having integral ribs formed on the inner surfaces of said cylindrical walls and extending longitudinally of the housings, said ribs being deformed by said cylindrical permanent magnet pressed axially into said housings through the respective open ends thereof to provide a close frictional fit between the outer cylindrical wall of the permanent magnet and the inner cylindrical walls of both said housings and to provide that said first and second housings are axially aligned, and held assembled together to enclose the rotor, by said permanent magnet inter-engaged by said frictional fit between the permanent magnet and both said housings.
In a dynamo-electric machine having housing means, a rotor within the housing, the rotor housing laminations and coil means carried by and rotatable with the rotor, and a cylindrical permanent magnet within the housing and radially outwardly of the laminations and coil means in functional cooperation with the said laminations and coil means, the improvement of said housing means comprising a first and a second shell-like housing having facing open ends and axially aligned cylindrical walls abutted together at said open ends to enclose said rotor, said housings being of plastic material of deformable nature and having inner surfaces off-set from true cylindrical surfaces closely complementing the outer cylindrical surface of the said permanent magnet at spaced locations outwardly of the outer cylindrical surface of said permanent magnet, said housings being deformed by the said permanent magnet to yield to the permanent magnet by the permanent magnet pressed axially into said housings through the respective open ends thereof to provide a close frictional fit between the outer cylindrical wall of the permanent magnet and the said inner surfaces of both said housings to provide that said first and second housings are axially aligned, and are held assembled together to enclose the rotor, by said permanent magnet inter-engaged by said frictional fit between the permanent magnet and both said housings.
Dependencies are inferred from the claim text.