US2919360A - Commutator device for a direct current micro-motor - Google Patents

Commutator device for a direct current micro-motor Download PDF

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Publication number
US2919360A
US2919360A US601173A US60117356A US2919360A US 2919360 A US2919360 A US 2919360A US 601173 A US601173 A US 601173A US 60117356 A US60117356 A US 60117356A US 2919360 A US2919360 A US 2919360A
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commutator
shaft
motor
direct current
brush wheel
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US601173A
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Mishima Matsuo
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    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K13/00—Structural associations of current collectors with motors or generators, e.g. brush mounting plates or connections to windings; Disposition of current collectors in motors or generators; Arrangements for improving commutation
    • H02K13/006—Structural associations of commutators

Definitions

  • a commutator device formicro-dynamo electric machines having a rotary armature provided with a cornmutator, the combination comprising a rotatablyjournalled shaft, a brush wheel fixed at one end of said shaft and having a peripheral rim with an annular surface in rolling contact with the commutator periphery, electrical contact spring means at the other end of said shaft for pressing said brush wheel rim resiliently into contact with the commutator, and simultaneously maintaining electrical contact with said shaft, said brush wheel being so ar ranged with respect to said commutator that portions of the annular rim surface thereof contacting said commutator periphery surface, slide with respect to said commutator during rotation of the armature, for the maintenance of low electrical contact resistance between the surfaces and electrical conducting means connected to said spring means.
  • a commutator device for micro-dynamo electric machines having a rotary armature provided with a commutator, the combination comprising a rotatably journalled shaft, extending substantially perpendicular with respect to the axis of rotation of the armature, a brush wheel fixed at one end of said shaft and having a: peripheral rim with an annular surface in rolling contact with the commutator periphery, and spring means at the other end of said shaft for pressing said brush wheel rim resiliently into contact with the commutator and simultaneously maintaining electrical contact with said shaft, said brush wheel being so arranged with respect to said commutator that portions of the annular rim surface thereof contacting said commutator periphery surface slide with respect to said commutator during rotation of the armature, whereby said contacting surfaces are continually lapped clean for the maintenance of low electrical contact resistance therebetween, and electrical. conducting means connected to said spring means.
  • a commutator device for micro-dyamo electric machines having a rotary armature provided with a. cornmutator
  • the combination comprising a rotat'ably journalled shaft, extending substantially perpendicular with respect to the axis of rotation of the armature, a brush wheel fixed at one end of said shaft and having a peripheral rim with an annular surface in rolling contact with the commutattor periphery, a pivot member secured to the other end of said shaft, a disc-like concave thrust bearing member abutting against said pivot member with its concave side, a helical spring acting in compression against the convex side of said thrust bearing, said brush wheel rim being resiliently pressed thereby to contact with said commutator and electrical contact being thereby simultaneously maintained between said thrust hearing member and said shaft, said brush wheel being so arranged with respect to said commutator that portions of the annular rim surface thereof contacting said commutator periphery surface slide with respect to said commutator during rotation
  • a commutator device for microdynamo electric machines having a rotary armature provided with a commutator
  • the combination comprising a rotatably journalled shaft, a brush wheel fixed at one end of said shaft and having a peripheral rim with an annular surface in contact with the commutator periphery, electrical contact spring means at the other end of said shaft for pressing said brush wheel rim resiliently into contact with the commutator and simultaneously maintaining electrical contact with said shaft, a bearing means rotatably supporting said shaft and permitting rolling and sliding movement of said annular surface in contact with the commutator periphery, whereby said brush wheel maintains continuous electric contact with the commutator at low contact pressure and with minimum dynamic electrical contact resistance.

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Motor Or Generator Current Collectors (AREA)
  • Motor Or Generator Frames (AREA)

Description

Dec. 29, 1959 MATSUO MISHIMA 2,919,360v
COMMUTATOR DEVICE FOR A DIRECT CURRENT MICRO-MOTOR V Filed July 31, 1956 INVEN TOR m4 731 0 fl/Sfl/MA BY @W, (Jaw- A *4 ATTORNEYS.
3v tion to generators, can be made without departing from the spirit and scope of the invention.
What I claim is:
1. In a commutator device. formicro-dynamo electric machines having a rotary armature provided with a cornmutator, the combination comprising a rotatablyjournalled shaft, a brush wheel fixed at one end of said shaft and having a peripheral rim with an annular surface in rolling contact with the commutator periphery, electrical contact spring means at the other end of said shaft for pressing said brush wheel rim resiliently into contact with the commutator, and simultaneously maintaining electrical contact with said shaft, said brush wheel being so ar ranged with respect to said commutator that portions of the annular rim surface thereof contacting said commutator periphery surface, slide with respect to said commutator during rotation of the armature, for the maintenance of low electrical contact resistance between the surfaces and electrical conducting means connected to said spring means.
2. In a commutator device for micro-dynamo electric machines having a rotary armature provided with a commutator, the combination comprising a rotatably journalled shaft, extending substantially perpendicular with respect to the axis of rotation of the armature, a brush wheel fixed at one end of said shaft and having a: peripheral rim with an annular surface in rolling contact with the commutator periphery, and spring means at the other end of said shaft for pressing said brush wheel rim resiliently into contact with the commutator and simultaneously maintaining electrical contact with said shaft, said brush wheel being so arranged with respect to said commutator that portions of the annular rim surface thereof contacting said commutator periphery surface slide with respect to said commutator during rotation of the armature, whereby said contacting surfaces are continually lapped clean for the maintenance of low electrical contact resistance therebetween, and electrical. conducting means connected to said spring means.
3. The invention as defined in claim 2, wherein said shaft is journalled between a pair of axially-spaced oilless bearing members.
4. In a commutator device for micro-dyamo electric machines having a rotary armature provided with a. cornmutator, the combination comprising a rotat'ably journalled shaft, extending substantially perpendicular with respect to the axis of rotation of the armature, a brush wheel fixed at one end of said shaft and having a peripheral rim with an annular surface in rolling contact with the commutattor periphery, a pivot member secured to the other end of said shaft, a disc-like concave thrust bearing member abutting against said pivot member with its concave side, a helical spring acting in compression against the convex side of said thrust bearing, said brush wheel rim being resiliently pressed thereby to contact with said commutator and electrical contact being thereby simultaneously maintained between said thrust hearing member and said shaft, said brush wheel being so arranged with respect to said commutator that portions of the annular rim surface thereof contacting said commutator periphery surface slide with respect to said commutator during rotation of the armature, whereby said contacting surfaces are continually lapped clean for the maintenance of low electrical contact resistance therebetween and electrical conducting means connected to said concave thrust bearing member.
5. The invention as defined in claim 4, including means for adjusting the compressional force exerted by said helical spring against said convex side of said concave thrust bearing.
6. The combination according to claim 1, wherein said shaft is pivotally supported to assume angular positions with respect to the axis of rotation of said commutator.
7. In a commutator device for microdynamo electric machines having a rotary armature provided with a commutator, the combination comprising a rotatably journalled shaft, a brush wheel fixed at one end of said shaft and having a peripheral rim with an annular surface in contact with the commutator periphery, electrical contact spring means at the other end of said shaft for pressing said brush wheel rim resiliently into contact with the commutator and simultaneously maintaining electrical contact with said shaft, a bearing means rotatably supporting said shaft and permitting rolling and sliding movement of said annular surface in contact with the commutator periphery, whereby said brush wheel maintains continuous electric contact with the commutator at low contact pressure and with minimum dynamic electrical contact resistance.
8. The combination according to claim 7, wherein said shaft extends substantially perpendicular to the axis of rotation of said armature.
9. The combination according to claim 7, wherein said shaft is pivotally supported to assume angular positions with respect to the axis of rotation of the armature.
References Cited in the file of this patent UNITED STATES PATENTS 228,116 Randall May 25, 1880 337,885 Stockwell Mar. 16, 1886 399,329 Heywood Mar. 12, 1889 788,291 Titzel Apr. 25, 1905 FOREIGN PATENTS 5,668 Great Britain of 1881 124,258 Germany Oct. I5, 1901
US601173A 1955-09-30 1956-07-31 Commutator device for a direct current micro-motor Expired - Lifetime US2919360A (en)

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Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3789251A (en) * 1973-02-22 1974-01-29 Gen Motors Corp Spring arm bearing retainer
US4521709A (en) * 1981-09-10 1985-06-04 Etat Francais Direct current dynamoelectric machines with auxiliary equalizer poles
US20050162035A1 (en) * 2004-01-22 2005-07-28 Molon Motor And Coil Corporation Brush and brush holder assembly for a micro horsepower motor
US20140312731A1 (en) * 2013-04-22 2014-10-23 Asmo Co., Ltd. Motor

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE124258C (en) *
US228116A (en) * 1880-05-25 Ohaeles a
US337885A (en) * 1886-03-16 stooiwell
US399329A (en) * 1889-03-12 Best available cop
US788291A (en) * 1901-11-09 1905-04-25 John Andrew Titzel Sr Dynamo or motor.

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE124258C (en) *
US228116A (en) * 1880-05-25 Ohaeles a
US337885A (en) * 1886-03-16 stooiwell
US399329A (en) * 1889-03-12 Best available cop
US788291A (en) * 1901-11-09 1905-04-25 John Andrew Titzel Sr Dynamo or motor.

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3789251A (en) * 1973-02-22 1974-01-29 Gen Motors Corp Spring arm bearing retainer
US4521709A (en) * 1981-09-10 1985-06-04 Etat Francais Direct current dynamoelectric machines with auxiliary equalizer poles
US20050162035A1 (en) * 2004-01-22 2005-07-28 Molon Motor And Coil Corporation Brush and brush holder assembly for a micro horsepower motor
US20140312731A1 (en) * 2013-04-22 2014-10-23 Asmo Co., Ltd. Motor
US9252646B2 (en) * 2013-04-22 2016-02-02 Asmo Co., Ltd. Motor with diffusion stopper

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