US4906882A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Rotor for an electric motor energized by permanent magnet means
Assignee: Frankl and Kirchner GmbH and Co KG
•
Filing: 1989-03-01
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Granted: 1990-03-06
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Expires: 2009-03-01
Abstract
Abstract A rotor for an electric motor energized by permanent magnet means comprises positioning devices for permanent magnets. These positioning devices consist of positioning rings disposed in the region of each end face of a rotor body and at least one inner positioning ring disposed on the rotor body between the two. The positioning rings comprise positioning webs which extend only over a small part of the length of the outer peripheral surface of the rotor body and which partially define compartments for in each case a permanent magnet. On the one hand, this ensures accurate and simple mounting of the permanent magnet while at the same time it reduces the moment of inertia of the rotor.
Inventors
- 👤 Hans Erndt
- 👤 Walter Ripplinger
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 22:23
CPC Classifications
H; H02; H02K; H02K1/00; H02K1/06; H02K1/22; H02K1/27; H02K1/2706; H02K1/272; H02K1/274; H02K1/2753; H02K1/278; H02K2201/00; H02K2201/06; Y; Y10; Y10T; Y10T29/00; Y10T29/49; Y10T29/49002; Y10T29/49009; Y10T29/49012
Claims Analysis
Total Claims: 28
Claim 1
Independent Claim
166 words
A rotor for an electric motor energized by permanent magnet means and comprising a substantially cylindrical rotor body with, projecting coaxially therefrom, shaft portions of which permanent magnets having end faces are located by positioning means axially and tangentially in relation to the rotor body and are fixed on the outer peripheral surface thereof, wherein the positioning means comprise in each case, disposed in the region of each end face of a rotor body, a positioning ring and, disposed between the latter and on the rotor body, at least one inner positioning ring, provided with positioning webs which extend over only a small portion of the length (L) of the outer peripheral surface of the rotor body, said positioning webs having side faces, one positioning ring and the inner positioning ring which bear against said end faces of said magnets on the one hand and mutually aligned side faces of said positioning webs on the other, partially defining compartments for in each case one permanent magnet.
Claim 2
Dependent Claim
166 words
A rotor for an electric motor energized by permanent magnet means and comprising a substantially cylindrical rotor body with, projecting coaxially therefrom, shaft portions of which permanent magnets having end faces are located by positioning means axially and tangentially in relation to the rotor body and are fixed on the outer peripheral surface thereof, wherein the positioning means comprise in each case, disposed in the region of each end face of a rotor body, a positioning ring and, disposed between the latter and on the rotor body, at least one inner positioning ring, provided with positioning webs which extend over only a small portion of the length (L) of the outer peripheral surface of the rotor body, said positioning webs having side faces, one positioning ring and the inner positioning ring which bear against said end faces of said magnets on the one hand and mutually aligned side faces of said positioning webs on the other, partially defining compartments for in each case one permanent magnet.
Claim 3
Dependent Claim
36 words
A rotor according to claim 1, wherein for the length (1, 1') of the positioning webs in respect of the length (L) of the outer peripheral surface of the rotor body (1), 1<0.1 L and 1'<0.1L.
Claim 4
Dependent Claim
36 words
A rotor according to claim 2, wherein for the length (1, 1') of the positioning webs in relation to the length (L) of the outer peripheral surface of the rotor body (1), 1<0.05 L and 1'<0.05L.
Claim 5
Dependent Claim
24 words
A rotor according to claim 1, wherein the positioning rings bear axially and without clearance on a respective end face of the rotor body.
Claim 6
Dependent Claim
21 words
A rotor according to claim 1, wherein the positioning rings and the inner positioning ring consist of rigidly-elastic synthetic plastics material.
Claim 7
Dependent Claim
14 words
A rotor according to claim 1, wherein the positioning webs are of hollow construction.
Claim 8
Dependent Claim
170 words
A rotor for an electric motor energized by permanent magnet means and comprising a substantially cylindrical rotor body with, projecting coaxially therefrom, shaft portions of which permanent magnets are located by positioning means axially and tangentially in relation to the rotor body and are fixed on the outer peripheral surface thereof, wherein the positioning means comprise in each case, disposed in the region of each end face of a rotor body, a positioning ring and, disposed between the latter and on the rotor body, at least one inner positioning ring, provided with positioning webs which extend over only a small portion of the length (L) of the outer peripheral surface of the rotor body, one positioning ring and the inner positioning ring on the one hand and mutually aligned positioning webs on the other, partially defining compartments for in each case one permanent magnet, and wherein the inner positioning ring comprises radially inwardly directed locking webs which engage an annular groove in the outer peripheral surface of the rotor body.
Claim 9
Dependent Claim
170 words
A rotor for an electric motor energized by permanent magnet means and comprising a substantially cylindrical rotor body with, projecting coaxially therefrom, shaft portions of which permanent magnets are located by positioning means axially and tangentially in relation to the rotor body and are fixed on the outer peripheral surface thereof, wherein the positioning means comprise in each case, disposed in the region of each end face of a rotor body, a positioning ring and, disposed between the latter and on the rotor body, at least one inner positioning ring, provided with positioning webs which extend over only a small portion of the length (L) of the outer peripheral surface of the rotor body, one positioning ring and the inner positioning ring on the one hand and mutually aligned positioning webs on the other, partially defining compartments for in each case one permanent magnet, and wherein the inner positioning ring comprises radially inwardly directed locking webs which engage an annular groove in the outer peripheral surface of the rotor body.
Claim 10
Dependent Claim
35 words
A rotor according to claim 7, wherein for the length (1, 1') of the positioning webs in respect of the length (L) of the outer peripheral surface of the rotor body, 1<0.1 L and 1'<0.1L.
Claim 11
Dependent Claim
34 words
A rotor according to claim 8, wherein for thelength (1, 1') of the positioning webs in relation to the length (L) of the outer peripheral surface of the rotor body, 1<0.5 L and 1'<0.05L.
Claim 12
Dependent Claim
24 words
A rotor according to claim 7, wherein the positioning rings bear axially and without clearance on a respective end face of the rotor body.
Claim 13
Dependent Claim
21 words
A rotor according to claim 7, wherein the positioning rings and the inner positioning ring consist of rigidly-elastic synthetic plastics material.
Claim 14
Dependent Claim
14 words
A rotor according to claim 7, wherein the positioning webs are of hollow construction.
Claim 15
Dependent Claim
171 words
A rotor for an electric motor energized by permanent magnet means and comprising a substantially cylindrical rotor body with, projecting coaxially therefrom, shaft portions of which permanent magnets are located by positioning means axially and tangentially in relation to the rotor body and are fixed on the outer peripheral surface thereof, wherein the postioning means comprise in each case, disposed in the region of each end face of a rotor body, a positioning ring and, disposed between the latter and on the rotor body, at least one inner positioning ring, provided with positioning webs which extend over only a small portion of the length (L) of the outer peripheral surface of the rotor body, one positioning ring and the inner positioning ring on the one hand and mutually aligned positioning webs on the other, partially defining compartments for in each case one permanent magnet, wherein the positioning rings in each case comprise a radially inwardly protruding projection which engages a positioning groove in the outer peripheral surface of the rotor body.
Claim 16
Dependent Claim
171 words
A rotor for an electric motor energized by permanent magnet means and comprising a substantially cylindrical rotor body with, projecting coaxially therefrom, shaft portions of which permanent magnets are located by positioning means axially and tangentially in relation to the rotor body and are fixed on the outer peripheral surface thereof, wherein the postioning means comprise in each case, disposed in the region of each end face of a rotor body, a positioning ring and, disposed between the latter and on the rotor body, at least one inner positioning ring, provided with positioning webs which extend over only a small portion of the length (L) of the outer peripheral surface of the rotor body, one positioning ring and the inner positioning ring on the one hand and mutually aligned positioning webs on the other, partially defining compartments for in each case one permanent magnet, wherein the positioning rings in each case comprise a radially inwardly protruding projection which engages a positioning groove in the outer peripheral surface of the rotor body.
Claim 17
Dependent Claim
35 words
A rotor according to claim 13, wherein for the length (1, 1') of the positioning webs in respect of the length (L) of the outer peripheral surface of the rotor body, 1<0.1 L and 1'<0.1L.
Claim 18
Dependent Claim
35 words
A rotor according to claim 14, wherein for the length (1, 1') of the positioning webs in relation to the length (L) of the outer peripheral surface of the rotor body, 1<0.05 L and 1'<0.5L.
Claim 19
Dependent Claim
24 words
A rotor according to claim 13, wherein the positioning rings bear axially and without clearance on a respective end face of the rotor body.
Claim 20
Dependent Claim
21 words
A rotor according to claim 13, wherein the positioning rings and the inner positioning ring consist of rigidly-elastic synthetic plastics material.
Claim 21
Dependent Claim
14 words
A rotor according to claim 13, wherein the positioning webs are of hollow construction.
Claim 22
Dependent Claim
174 words
A rotor for an electric motor energized by permanent magnet means and comprising a substantially cylindrical rotor body with, projecting coaxially therefrom, shaft portions of which permanent magnets are located by positioning means axially and tangentially in relation to the rotor body and are fixed on the outer peripheral surface thereof, wherein the positioning means comprise in each case, disposed in the region of each end face of a rotor body, a positioning ring and, disposed between the latter and on the rotor body, at least one inner positioning ring, provided with positioning webs which extend over only a small portion of the length (L) of the outer peripheral surface of the rotor body, one positioning ring and the inner positioning ring on the one hand and mutually aligned positioning webs on the other, partially defining compartments for in each case one permanent magnet, wherein the positioning rings are constructed as annular discs and are in each case mounted without radial clearance on a cylindrical receiving portion which is immediately adjacent the rotor body.
Claim 23
Dependent Claim
174 words
A rotor for an electric motor energized by permanent magnet means and comprising a substantially cylindrical rotor body with, projecting coaxially therefrom, shaft portions of which permanent magnets are located by positioning means axially and tangentially in relation to the rotor body and are fixed on the outer peripheral surface thereof, wherein the positioning means comprise in each case, disposed in the region of each end face of a rotor body, a positioning ring and, disposed between the latter and on the rotor body, at least one inner positioning ring, provided with positioning webs which extend over only a small portion of the length (L) of the outer peripheral surface of the rotor body, one positioning ring and the inner positioning ring on the one hand and mutually aligned positioning webs on the other, partially defining compartments for in each case one permanent magnet, wherein the positioning rings are constructed as annular discs and are in each case mounted without radial clearance on a cylindrical receiving portion which is immediately adjacent the rotor body.
Claim 24
Dependent Claim
35 words
A rotor according to claim 1, wherein for the length (1, 1') of the positioning webs in respect of the length (L) of the outer peripheral surface of the rotor body, 1<0.1 L and 1'<0.1L.
Claim 25
Dependent Claim
35 words
A rotor according to claim 20, wherein for the length (1, 1') of the positioning webs in relation to the length (L) of the outer peripheral surface of the rotor body, 1<0.5 L and 1'<0.05L.
Claim 26
Dependent Claim
24 words
A rotor according to claim 19, wherein the positioning rings bear axially and without clearance on a respective end face of the rotor body.
Claim 27
Dependent Claim
21 words
A rotor according to claim 19, wherein the positioning rings and the inner positioning ring consist of rigidly-elastic synthetic plastics material.
Claim 28
Dependent Claim
14 words
A rotor according to claim 19, wherein the positioning webs are of hollow construction.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1993-03-05 | 1993-09-04 | 1994-03-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1997-03-05 | 1997-09-04 | 1998-03-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2001-03-05 | 2001-09-04 | 2002-03-06 | $7700.00 | Window Closed / Lapsed |