US4626725A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Synchronous rotary machine
Assignee: Fanuc Corp
•
Filing: 1985-02-27
•
Granted: 1986-12-02
•
Expires: 2005-02-27
Abstract
Abstract A synchronous rotary machine comprising a stacked stator iron core (21) made of a number of thin plates stacked in the axial direction. The stator iron core forms a part of the outer shell of the synchronous rotary machine. A winding (23) is wound around the stator iron core. A pair of brackets (24, 25) are attached to the opposite ends of the stator iron core. A rotor assembly (29) is rotatably supported on the brackets through bearings mounted to the brackets, respectively. The brackets and stator iron core are tightened in the axial direction thereof and firmly fixed to each other. At least two rods (31) having the same length are provided on the stator iron core. Each of the rods extends through the stator iron core in the axial direction. When the stator iron core is contracted to a predetermined length, the opposite end surfaces thereof abut against the brackets, respectively, and limit the distance between the brackets.
Inventors
- 👤 Shigeki Kawada
- 👤 Yoichi Amemiya
- 👤 Masatoyo Sogabe
- 👤 Noboru Iwamatsu
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 07:02
CPC Classifications
H; H02; H02K; H02K5/00; H02K5/04; H02K5/15; H02K1/00; H02K1/06; H02K1/12; H02K1/18; H02K1/185; H02K15/00; H02K15/16
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
156 words
A synchronous rotary machine comprising: a stator iron core forming a part of the outer shell of the rotary machine and made of a number of thin plates stacked in the axial direction; a winding wound around said stator iron core; a pair of brackets attached to opposite ends of said stator iron core, respectively; a rotor assembly rotatably supported on said brackets through bearing members mounted on said brackets, respectively; a plurality of tightening members for tightening said brackets and said stator iron core in the axial direction thereof so that said stator iron core and said brackets are firmly tightened to each other; and at least two rods extending in the axial direction through said stator iron core and limiting the distance between said brackets in such a manner that each of the rods abuts at the opposite ends thereof to said brackets when said stator iron core is contracted to a predetermined length.
Claim 2
Dependent Claim
156 words
A synchronous rotary machine comprising: a stator iron core forming a part of the outer shell of the rotary machine and made of a number of thin plates stacked in the axial direction; a winding wound around said stator iron core; a pair of brackets attached to opposite ends of said stator iron core, respectively; a rotor assembly rotatably supported on said brackets through bearing members mounted on said brackets, respectively; a plurality of tightening members for tightening said brackets and said stator iron core in the axial direction thereof so that said stator iron core and said brackets are firmly tightened to each other; and at least two rods extending in the axial direction through said stator iron core and limiting the distance between said brackets in such a manner that each of the rods abuts at the opposite ends thereof to said brackets when said stator iron core is contracted to a predetermined length.
Claim 3
Dependent Claim
47 words
A synchronous rotary machine as set forth in claim 1, characterized in that each of said rods has at the opposite ends thereof threaded holes and that said brackets are connected to said rods by means of bolts which are screwed into said holes of said rods.
Claim 4
Dependent Claim
82 words
A synchronous rotary machine as set forth in claim 1, characterized in that eagh of said tightening members includes a connecting bar which is longer than said rods and a pair of bolts, each of said connecting bars being fitted at the opposite ends thereof into holes formed in said brackets and having at the opposite end surface thereof threaded holes, said bolts extending through said holes in said brackets and being screwed into said threaded holes of said connecting bars, respectively.
Claim 5
Dependent Claim
36 words
A synchronous rotary machine as set forth in claim 1, characterized in that a temporary fixing treatment is previously applied to said stator iron core for preventing said stator iron core from falling out of shape.
Claim 6
Dependent Claim
20 words
A synchronous rotary machine as set forth in claim 1, characterized in that said rotor is a permanent-magnet field rotor.
References Cited (Backward Citations)
US1539527A
Cited
US2489840A
Cited
JPS4873703A
Cited
US4170057A
Cited
US4295268A
Cited
JPS5638949A
Cited
JPS56106032A
Cited
JPS58143450A
Cited
JPS5937855A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1989-12-01 | 1990-06-02 | 1990-12-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1993-12-01 | 1994-06-02 | 1994-12-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1997-12-01 | 1998-06-02 | 1998-12-02 | $7700.00 | Window Closed / Lapsed |