US1757393A - Commutator - Google Patents

Commutator Download PDF

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Publication number
US1757393A
US1757393A US206777A US20677727A US1757393A US 1757393 A US1757393 A US 1757393A US 206777 A US206777 A US 206777A US 20677727 A US20677727 A US 20677727A US 1757393 A US1757393 A US 1757393A
Authority
US
United States
Prior art keywords
commutator
lugs
ring
shaped
segments
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
US206777A
Other languages
English (en)
Inventor
Schmid Anton
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Robert Bosch AG
Robert Bosch GmbH
Original Assignee
Robert Bosch GmbH
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Robert Bosch GmbH filed Critical Robert Bosch GmbH
Application granted granted Critical
Publication of US1757393A publication Critical patent/US1757393A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
    • H01R43/00—Apparatus or processes specially adapted for manufacturing, assembling, maintaining, or repairing of line connectors or current collectors or for joining electric conductors
    • H01R43/06—Manufacture of commutators
    • H01R43/08—Manufacture of commutators in which segments are not separated until after assembly
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
    • H01R39/00—Rotary current collectors, distributors or interrupters
    • H01R39/02—Details for dynamo electric machines
    • H01R39/04—Commutators
    • H01R39/06—Commutators other than with external cylindrical contact surface, e.g. flat commutators

Definitions

  • Fig. 1 is a front end view of a drum-shaped commutator embodying the invention.
  • Fig. 2 is a section taken on the line AB of Fig. 1. 1
  • Fig. 3' is a section on the axis of the metal ring used in the commutator of Figs. 1 and 2.
  • Fig. 4 is a blank from which the ring of Fig. 3 may be formed.
  • Fig. 5 is a section through a disk-shaped commutator embodying my invention.
  • Fig. 6 is a, front view partly in section on the line C-D of Fig. 5.
  • Fig. 7 is a back view of the commutator of Figs. 5 and 6.
  • Fig. 8 is a fragmentary plan view of the annular blank.
  • the metal 'sleeve or ring 1 from which the commutator bars or sections are formed is made, as shown in Fig. 3, in the form of a cylinder of sheet metal with anchor or looking portions made, in the present example, in the shape of reentrant hook-shaped lugs 2 and 3, the lugs2 being doubled on themselves to form a reflex or double bend with an outwardly extending loop 16.
  • a metal cylinder with reentrant ends having the same cross section as that of the lugs 2 and 3 and subsequently forming the lugs by milling out at the ends; or it may be formed from a blank 8 as shown in Fig. 4, punched out from a flat metal strip, the lugs 2 and 3 formed on the opposite edges of the blank being first turned down in the hook form shown in Fig. 3, and the whole then bent into the sleeve or ring form of Fig. 3.
  • the sleeve of Fig. 3 and a suitable bushing 4 are imbedded in a body or hub 5 of insulating material, the insulatingmaterial being pressed around the ring and the lugs 2 and 3 while in a plastic state tobring it into intimate contact with the ring and the lugs and completely fill the space between the reentrant hook-shaped lugs, as clearly shown in Fig. 2.
  • the body or hub 5 is preferably formed of any suitable insulating material which can be molded or pressed in the plastic state. Any one of the many wellknown resinous materials, such as bakelite for example, which are initially plastic, but which harden under the application'of heat and pressure, may be used. After the insulating material has set or hardened, the sleeve 1 is cut through longitudinally between the lugs to form the commutator bars 17 separated by slots 6. outwardly extending bent portions 16 of the hook-shaped lugs 2 serve as convenient connecting posts for connecting the commutator sections with the armature winding, to facilitate which portions 16 are provided with notches 7 in which the ends of the armature wires may be soldered or otherwise attached.
  • any suitable insulating material such as bakelite for example, which are initially plastic, but which harden under the application'of heat and pressure, may be used.
  • the sleeve 1 is cut through longitudinally between the lugs to form the commutator bars 17 separated by slots 6.
  • each of the commutator bars or sections 17 is securely-held in thehub 5 against loosening by the hook-shaped lugs 2 and 3 which extend radially from the inside of the arcuate commutator sections, each lug extendlite or the like, the ring 9 and hub 18 together with a suitable bushing 12 being pressed together, while the material of the hub is in a plastic state, to causetheinsulating material to surround the innerand peripheral edges of the ring 9, to entirely imbed the lugs 10, and to imbed all except the extreme end portions of the lugs 11.
  • the flat ring 9 is cut through radially between the lugs to form from the metallic ring 9 the separate commutator segments 18 shown in section in Fig. 6.
  • the free ends of the lugs 11 serve as connecting posts for connecting the commutator segments 18 with the armature windings of the machine on which the commutator is to be used, to facilitate which the ends of these lugs are provided with notches 15.
  • the outer surface of the metal ring may be trued by turning down on a lathe before separation into segments with the advantage that the turning oper- ;tion may be performed on a continuous surace.
  • the locking or anchor portions or lugs extend at such angles from the respective commutator section or bar that the commutator sections are securely locked or secured in the insulating body or hub at all times, irrespective of the direction from which the stresses tending to loosenthe parts may come.
  • a commutator consisting of a disk shaped body member formed of insulating material, and spaced metallic commutator segments in the form of segmentalsections of a flat ring imbedded in one face of said member with-their inner and outer circular edges countersunk in and covered by the material of said member and their radial edges free of the material of said member, said sections being provided with laterally extending inner and outer anchor lugs, a substantial portion of each of said lugs being embedded and locked in said body member against radial movement, said outer lugs extending through and clear of the insulating material to form connecting posts.
  • a disk-shaped commutator comprising commutator segments in the form of and arranged as segments of a flat ring, and a diskshaped body of insulating material imbedding and covering one flat surface and the entire inner and outer circular edges of the flat ring segments, and undercut between the adjacent radial edges of said segments, a por tion of each of said segments extending axially through and clear of the disk-shape body of insulating material to form connectfixed my signature.

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  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Motor Or Generator Current Collectors (AREA)
US206777A 1926-07-22 1927-07-18 Commutator Expired - Lifetime US1757393A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE274839X 1926-07-22

Publications (1)

Publication Number Publication Date
US1757393A true US1757393A (en) 1930-05-06

Family

ID=6022510

Family Applications (1)

Application Number Title Priority Date Filing Date
US206777A Expired - Lifetime US1757393A (en) 1926-07-22 1927-07-18 Commutator

Country Status (4)

Country Link
US (1) US1757393A (enrdf_load_stackoverflow)
BE (1) BE343077A (enrdf_load_stackoverflow)
FR (1) FR636521A (enrdf_load_stackoverflow)
GB (1) GB274839A (enrdf_load_stackoverflow)

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2421845A (en) * 1944-09-11 1947-06-10 Knapp Monarch Co Commutator structure
US2604502A (en) * 1949-04-15 1952-07-22 Mach Electrostatiques Sa Des Commutator
US2639396A (en) * 1950-04-10 1953-05-19 N T Kyle Commutator, armature, and method of making the same
US2645733A (en) * 1950-10-23 1953-07-14 Union Carbide & Carbon Corp Commutator
US2826707A (en) * 1955-04-12 1958-03-11 Hoover Co Commutators for dynamo-electric machines
US3193713A (en) * 1960-10-06 1965-07-06 Gen Motors Corp Inductor alternator
US4453102A (en) * 1981-04-14 1984-06-05 Nihon Radiator Co., Ltd. Commutator for flat motor
WO2010009959A3 (de) * 2008-07-25 2010-06-03 Robert Bosch Gmbh Kommutator für eine elektrische maschine sowie system

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
ZA733925B (en) * 1972-06-20 1974-05-29 Lucas Electrical Co Ltd Commutators

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2421845A (en) * 1944-09-11 1947-06-10 Knapp Monarch Co Commutator structure
US2604502A (en) * 1949-04-15 1952-07-22 Mach Electrostatiques Sa Des Commutator
US2639396A (en) * 1950-04-10 1953-05-19 N T Kyle Commutator, armature, and method of making the same
US2645733A (en) * 1950-10-23 1953-07-14 Union Carbide & Carbon Corp Commutator
US2826707A (en) * 1955-04-12 1958-03-11 Hoover Co Commutators for dynamo-electric machines
US3193713A (en) * 1960-10-06 1965-07-06 Gen Motors Corp Inductor alternator
US4453102A (en) * 1981-04-14 1984-06-05 Nihon Radiator Co., Ltd. Commutator for flat motor
US4523374A (en) * 1981-04-14 1985-06-18 Nihon Radiotor Co., Ltd. Commutator for flat motor
WO2010009959A3 (de) * 2008-07-25 2010-06-03 Robert Bosch Gmbh Kommutator für eine elektrische maschine sowie system

Also Published As

Publication number Publication date
GB274839A (en) 1927-11-10
FR636521A (enrdf_load_stackoverflow) 1928-04-11
BE343077A (enrdf_load_stackoverflow)

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