US4228377A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Rotor structure for dynamo electric machines subject to vibratory, shock, or temperature change effects
Assignee: Robert Bosch GmbH
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Filing: 1979-03-13
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Granted: 1980-10-14
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Expires: 1999-03-13
Abstract
Abstract To reliably place a winding on a cylindrical pole core of a claw pole rotor structure for an alternator subjected to extremes in shock, vibration and oscillatory loadings, for example for use with motorcycle alternators, the pole core is deformed by knurling, grooving, rifling, or the like, preferably extending in cross direction, and a layer of mesh or net structure insulating fabric material, preferably a linen mesh, is placed over the pole core, the woven fabric mesh structure mechanically interlocking with the deformations and projections on the surface of the rotor; preferably, a plurality of wraps of the layer are provided, the field winding being wound directly over the uppermost wrap of the fabric layer in the form of a toroidal winding and, after assembly with the claw poles, the entire structure is impregnated with a suitable insulating compound, for example by vacuum impregnation, in accordance with standard dynamo electric machine construction.
Inventors
- 👤 Helmut Kreuzer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 20:43
CPC Classifications
H; H02; H02K; H02K3/00; H02K3/32; H02K3/325; H02K3/46; H02K3/52; H02K3/527; H02K3/528
Claims Analysis
Total Claims: 17
Claim 1
Independent Claim
122 words
Rotor structure for dynamo electric machines, particularly for such machines subject to oscillatory, vibratory, shock or temperature change effects, comprising a cylindrical pole core (2, 4); a plurality of axially located, radially projecting claw pole shoes (3a, 3b); and a winding (5) wound on the cylindrical core, wherein, in accordance with the invention, at least the portion (4) of the pole core on which the winding is placed is formed with surface deformations in the form of grooves, notches or knurls, and leaving projections (11a, 11b . . . 11d) between the deformations; and a layer (12) of mesh or net structure insulating fabric material positioned over the surface including said deformations, the winding (5) being located over said fabric layer (12).
Claim 2
Dependent Claim
122 words
Rotor structure for dynamo electric machines, particularly for such machines subject to oscillatory, vibratory, shock or temperature change effects, comprising a cylindrical pole core (2, 4); a plurality of axially located, radially projecting claw pole shoes (3a, 3b); and a winding (5) wound on the cylindrical core, wherein, in accordance with the invention, at least the portion (4) of the pole core on which the winding is placed is formed with surface deformations in the form of grooves, notches or knurls, and leaving projections (11a, 11b . . . 11d) between the deformations; and a layer (12) of mesh or net structure insulating fabric material positioned over the surface including said deformations, the winding (5) being located over said fabric layer (12).
Claim 3
Dependent Claim
12 words
Structure according to claim 1, wherein the deformations extend in crossing direction.
Claim 4
Dependent Claim
26 words
Structure according to claim 2, wherein the projections (11a, 11b . . . 11d) between the deformations form a plurality of rows of essentially pyramidal shape.
Claim 5
Dependent Claim
25 words
Structure according to claim 2, wherein the mesh or net structure insulating fabric material includes crossing yarns or threads (13, 14) fitting into the deformations.
Claim 6
Dependent Claim
51 words
Structure according to claim 4, wherein the threads or yarns forming said mesh or net structure insulating fabric material are mechanically interlocked by the projections located between the deformations, said projections fitting between the pores or spaces between the individual yarns or threads forming said mesh or net structure fabric material.
Claim 7
Dependent Claim
14 words
Structure according to claim 4, wherein said fabric material comprises a linen weave material.
Claim 8
Dependent Claim
25 words
Structure according to claim 1, wherein said layer of mesh or net structure insulating fabric material comprises a plurality of superimposed wraps of said material.
Claim 9
Dependent Claim
25 words
Structure according to claim 6, wherein said layer of mesh or net structure insulating fabric material comprises a plurality of superimposed wraps of said material.
Claim 10
Dependent Claim
28 words
Structure according to claim 1, further including an adhesive connecting the mesh or net structure insulating fabric material to the surface of the pole core including said deformations.
Claim 11
Dependent Claim
28 words
Structure according to claim 8, further including an adhesive connecting the mesh or net structure insulating fabric material to the surface of the pole core including said deformations.
Claim 12
Dependent Claim
39 words
Structure according to claim 1, further including an impregnating material impregnating the cylindrical pole core (2, 4), the claw pole shoes (3a, 3b), the winding (5) and the layer (12) of fabric material to form a unitary composite rotor.
Claim 13
Dependent Claim
39 words
Structure according to claim 10, further including an impregnating material impregnating the cylindrical pole core (2, 4), the claw pole shoes (3a, 3b), the winding (5) and the layer (12) of fabric material to form a unitary composite rotor.
Claim 14
Dependent Claim
79 words
Structure according to claim 1, wherein the mesh or net structure insulating fabric material comprises a web which is wider than the axial length of said winding, the portion of said web extending beyond said winding being folded over the axial ends of said winding (5) and protecting the ends of said winding from contact with the claw pole shoes while being held in position with respect to the winding by interlocking engagement with said deformations and projections, respectively.
Claim 15
Dependent Claim
79 words
Structure according to claim 12, wherein the mesh or net structure insulating fabric material comprises a web which is wider than the axial length of said winding, the portion of said web extending beyond said winding being folded over the axial ends of said winding (5) and protecting the ends of said winding from contact with the claw pole shoes while being held in position with respect to the winding by interlocking engagement with said deformations and projections, respectively.
Claim 16
Dependent Claim
22 words
Structure according to claim 7, wherein the height of the projections is between the thickness of two superimposed adjacent wraps of material.
Claim 17
Dependent Claim
28 words
Structure according to claim 7, wherein the height of the projections is between the thickness of the wrap of material adjacent the core and the next adjacent wrap.
References Cited (Backward Citations)
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Cited
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Cited
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Cited
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Cited
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Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1983-10-14 | 1984-04-14 | 1984-10-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1987-10-14 | 1988-04-14 | 1988-10-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1991-10-14 | 1992-04-14 | 1992-10-14 | $7700.00 | Window Closed / Lapsed |