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Electric motor construction
| Details |
Inventors: Yassemi, Mark;
Assignee: Excellon Industries (Torrance, CA)
Primary Examiner: Skudy; R.
Assistant Examiner:
Attorney, Agent or Firm: Gausewitz, Carr, Rothenberg & Edwards
This invention provides an electric motor for high speed operation that includes an inner housing assembly made up of two members having tubular walls having telescoped sections bonded together at the central portion of the assembly, with the field of motor bonded to the inside of the two inner housing members. The opposite ends of the inner housing assembly then are bored to provide precisely aligned bearing support surfaces. Ball bearings fit on these surfaces and rotatably mount the armature. An outer housing fits around the inner housing and is spaced from it, providing an unobstructed annular passageway for circulating coolant. The passageway includes inwardly directed portions around the bearings for efficient removal of heat from those areas. |
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DETAILED DESCRIPTION I claim: 1.
An electric motor comprising a housing means, said housing means including first and second housing members, said first and second housing members having circumferential walls, said circumferential walls having end portions telescoped together, said first and second housing members defining first and second bearing support surfaces, respectively, said first and second bearing support surfaces being axially aligned, and adhesive means interposed between said end portions for bonding said circumferential walls together so that said first and second housing members form a unitary structure, there being no fastener means for securing said first and second housing members together so that said first and second housing members are substantially undistorted, a first bearing carried by said first bearing support surface, a second bearing carried by said second bearing support surface, said first and second bearings being axially aligned by said first and second bearing support surfaces, a field in said housing means, and an armature assembly rotatable in said first and second bearings.
2.
A device as recited in claim 1 in which said field is bonded to the interior of said circumferential walls of said first and second housing members.
3.
A device as recited in claim 1 in which one of said end portions defines an annular recess in said circumferential wall thereof, and the other of said end portions defines a counterbore, said portion defining said annular recess being complementarily received in said counterbore for providing said adjacent end portions telescoped together.
4.
A device as recited in claim 2 in which said passage is substantially uniform in dimension and unobstructed throughout the space between said circumferential walls of said first and second housing members and said third housing member.
5.
A device as recited in claim 4 in which said passage includes portions extending to positions adjacent said first and second bearings for conducting heat away from said bearings upon circulation of said coolant
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