US4015154A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Motor and method for making same
Assignee: Sony Corp
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Filing: 1975-12-12
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Granted: 1977-03-29
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Expires: 1995-12-12
Abstract
Abstract In a method for making a motor, wherein a plurality of lamellar ring plates each having plural teeth extending outwardly from its inner ring portion are laminated, coils are wound on every tooth, and then inserted in a ring which are also made of a plurality of laminated lameller ring plates so as to cover all openings between teeth and thereby a stator is formed. After that, the stator is molded with resin comprising mainly the mixture of thermoplastic resin and thermosetting resin. And then, a rotor is inserted into the stator after cutting off the inner ring portions of the stator to form the motor.
Inventors
- 👤 Sadao Tanaka
- 👤 Kiyosi Endo
- 👤 Fumio Karakawa
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 21:51
CPC Classifications
H; H02; H02K; H02K15/00; H02K15/02; H02K15/021; H02K15/12; Y; Y10; Y10T; Y10T29/00; Y10T29/49; Y10T29/49002; Y10T29/49009
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
274 words
A method for making a stator structure for a motor, said method comprising the steps of: A. providing a stack of first ferromagnetically soft rings, each of said rings comprising an innerconnecting ring portion and a plurality of teeth portions extending outwardly from the respective interconnecting ring portion; B. disposing a plurality of coils around said teeth portions; C. providing a stack of second ferromagnetically soft rings; D. inserting said stack of first rings with said coils disposed around said teeth portions into said stack of second rings; E. molding the combined stacks of first and second rings with a dimensionally stable resin mixture of thermosetting resin and thermoplastic resin to hold said first and second rings rigidly together to form a motor casing structure entirely enclosing said rings and said coils and comprising a recess coaxial with said rings and extending inwardly from one end of said casing structure to permit a rotor to be inserted therein, said casing structure comprising an integrally molded section at the other end thereof having a first concave portion formed therein coaxial with said recess to hold bearing means to provide a first accurately placed receptacle for supporting one end of the rotor; F. molding a bracket of said dimensionally stable resin mixture to attach to said one end of said casing structure to close said recess, said bracket being molded to have a second concave portion to provide a second accurately placed bearing receptacle for supporting the other end of the rotor; and G. assembling said bracket and said casing structure together such that said first and second concave portions are aligned to support said rotor.
Claim 2
Independent Claim
274 words
A method for making a stator structure for a motor, said method comprising the steps of: A. providing a stack of first ferromagnetically soft rings, each of said rings comprising an innerconnecting ring portion and a plurality of teeth portions extending outwardly from the respective interconnecting ring portion; B. disposing a plurality of coils around said teeth portions; C. providing a stack of second ferromagnetically soft rings; D. inserting said stack of first rings with said coils disposed around said teeth portions into said stack of second rings; E. molding the combined stacks of first and second rings with a dimensionally stable resin mixture of thermosetting resin and thermoplastic resin to hold said first and second rings rigidly together to form a motor casing structure entirely enclosing said rings and said coils and comprising a recess coaxial with said rings and extending inwardly from one end of said casing structure to permit a rotor to be inserted therein, said casing structure comprising an integrally molded section at the other end thereof having a first concave portion formed therein coaxial with said recess to hold bearing means to provide a first accurately placed receptacle for supporting one end of the rotor; F. molding a bracket of said dimensionally stable resin mixture to attach to said one end of said casing structure to close said recess, said bracket being molded to have a second concave portion to provide a second accurately placed bearing receptacle for supporting the other end of the rotor; and G. assembling said bracket and said casing structure together such that said first and second concave portions are aligned to support said rotor.
Claim 3
Dependent Claim
32 words
The method of claim 1 comprising the step of removing the radially innermost part of said connecting ring portion of said motor casing structure to separate ferromagnetic connection between said teeth portions.
Claim 4
Dependent Claim
32 words
The method of claim 1 in which said thermosetting resin comprises about 80% by weight of said resin mixture and said thermoplastic resin is about 20% by weight of said resin mixture.
Claim 5
Dependent Claim
11 words
A stator structure made according to the method of claim 1.
References Cited (Backward Citations)
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US2695969A
Cited
US3194993A
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1980-03-28 | 1980-09-27 | 1981-03-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-03-28 | 1984-09-27 | 1985-03-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-03-28 | 1988-09-27 | 1989-03-29 | $7700.00 | Window Closed / Lapsed |