EP0081445B1 - Procédé de fabrication d'une bague collectrice pour appareil électrique du type tournant - Google Patents

Procédé de fabrication d'une bague collectrice pour appareil électrique du type tournant Download PDF

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Publication number
EP0081445B1
EP0081445B1 EP82420175A EP82420175A EP0081445B1 EP 0081445 B1 EP0081445 B1 EP 0081445B1 EP 82420175 A EP82420175 A EP 82420175A EP 82420175 A EP82420175 A EP 82420175A EP 0081445 B1 EP0081445 B1 EP 0081445B1
Authority
EP
European Patent Office
Prior art keywords
core
ferrules
housings
conductors
process according
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
Application number
EP82420175A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0081445A1 (fr
Inventor
Georges Duranthon
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.)
Freudenberg SAS
Original Assignee
Freudenberg SAS
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 Freudenberg SAS filed Critical Freudenberg SAS
Priority to AT82420175T priority Critical patent/ATE16739T1/de
Publication of EP0081445A1 publication Critical patent/EP0081445A1/fr
Application granted granted Critical
Publication of EP0081445B1 publication Critical patent/EP0081445B1/fr
Expired 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
    • H01R39/00—Rotary current collectors, distributors or interrupters
    • H01R39/02—Details for dynamo electric machines
    • H01R39/08—Slip-rings

Definitions

  • the present invention relates to electrical devices of the rotating type, such as electricity generators or electric motors, in the broadest sense, and it relates, more particularly, to the means used to ensure electrical contact between brushes, wipers or coals and the constituent element forming an armature or inductor.
  • a slip ring comprising an annular core made of insulating material, at least two conductive ferrules covering one of the peripheral faces of the core, being axially offset, without contact. one with the other, and at least two conductors integral with the ferrules, incorporated into the thickness of the core and projecting axially out of at least one of the transverse faces of the latter.
  • Such a construction can be envisaged in the case of mounting on the rotation shaft of a rotor or, again, at the internal periphery of a cage.
  • the conductors integral with the ferrules are normally intended for connection with the means of producing electrical energy or of transforming the latter.
  • the manufacture of such a ring includes the execution of conductive ferrules which are manufactured from a cylindrical envelope of conductive material, for example copper, on which the two conductors are added by welding by being offset axially and angularly.
  • the conductors are attached to the internal peripheral surface of the cylindrical envelope.
  • the insulating core is formed by molding in the envelope and coats the two conductors which are thus partially trapped in the thickness of the core.
  • a recovery operation is then executed to machine a peripheral groove in the conductive envelope, in order to provide a continuity solution making it possible to delimit two independent ferrules or conductive tracks which are also each connected to a conductor.
  • slip rings obtained according to the above process, give satisfaction for the function which they must assume.
  • such rings have major drawbacks in terms of manufacturing.
  • the molding of the core in the envelope represents an operation necessarily involving the placing in an open mold prior to injection. This represents a significant subjection increasing the manufacturing cost and decreasing the rate.
  • the object of the invention is to remedy the drawbacks of this process by recommending a new process for producing a slip ring comprising the characteristics mentioned in the preamble of claim 1.
  • the object of the invention is to propose a new simple, rapid and inexpensive process, making it possible to obtain a robust, reliable and mass-produced slip ring automatically.
  • Another object of the invention is to propose a new process eliminating any recovery and machining operation, such as shrinking and cutting.
  • An additional object of the invention is to propose a method making it possible to indifferently execute slip rings whose conductive tracks can be on the external or internal surface of said annular ring.
  • Another object of the invention is to propose a new method making it possible to increase the line of flight between the conductive tracks, without involving any specific operation.
  • Fig. 1 is a sectional elevation of a ring according to the invention.
  • Figs. 2 and 3 are transverse views taken respectively along lines II-II and III-III of FIG. 1.
  • Fig. 4 is a sectional elevation illustrating another embodiment of the subject of the invention.
  • Lesfig. 1 to 3 show a first embodiment relating to a slip ring intended to be mounted, by any suitable means, on the rotation shaft of a rotating central rotor, such as the armature of a conventional electric machine of the type turning.
  • connection means between the slip ring and the shaft can be various and involve a bonding or a positive drive by grooving, flat, key, etc.
  • the slip ring comprises a core 1 of insulating material, preferably made of a thermoplastic material.
  • the core 1 is in an annular shape of constant thickness.
  • the axial length of this core can be variable by being less than, equal to or greater than its average diameter.
  • the insulating core 1 is made to comprise, in its thickness, at least two housings 2 and 3 extending axially from each of the transverse edges 1a and 1b of the core 1.
  • the housings 2 and 3 are angularly offset , preferably by a measurement corresponding to the division of the circumference of the core 1 by the number of conductive tracks to be established.
  • the ring is intended to have two tracks and the housings 2 and 3 are preferably offset by 180 °.
  • the housings 2 and 3 are also arranged so as to open onto one of the peripheral faces of the core 1 by openings 4 and 5 which may be of identical or different length from the axial length of the housings 2 and 3.
  • the housings 2 and 3 are arranged to open at the level of the external peripheral surface of the core 1.
  • One of the housings for example the housing 3, is extended axially by a hole 6, included in the thickness of the core 1.
  • the hole 6 opens at the transverse edge of the core 1 corresponding to that from which the other housing 2 is formed.
  • the slip ring also includes two conductive ferrules 7 and 8 mounted, without the possibility of axial sliding and angular displacement, at the peripheral surface of the core 1 corresponding to the openings 4 and 5 of the housings 2 and 3.
  • the conductive ferrules 7 and 8 are therefore mounted on the outer periphery of the insulating core 1.
  • the ferrules 7 and 8 are provided with conductors 9 and 10 made integral, in particular by spot welding of one of the peripheral faces.
  • the conductors 9 and 10 are attached to the inner face.
  • the ferrule 7 is mounted so that the conductor 9 is engaged in the housing 2 which is, at least in part, covered by the ferrule 7. In this state, the conductor 9 projects axially out of the transverse edge 12.
  • the ferrule 8 is mounted so that the conductor 10 is engaged in the hole 6 by the housing 3 which is covered, at least in part, by the ferrule 8. In this state, the conductor 10 also projects axially from the transverse edge 1_a.
  • An electrical connection can thus be easily carried out between the conductors 9 and 10 and the organs producing or transforming electrical energy of the device.
  • the ferrules 7 and 9 are mounted by axial sliding in the direction of the arrows f i -f 2 , from the transverse edges 1 a-1 b, being angularly oriented to make the conductors 9 and 10 coincide with the housings correspondents 2 and 3.
  • the mounting of the ferrules 7 and 8 is ensured to establish an angular and axial connection with respect to the core 1.
  • the orientation of the pins 11 and 12 is chosen so that the engagement and mounting of the ferrules 7 and 8 can be carried out in the direction of the arrows f and f 2 .
  • the axial engagement is carried out after heating, at least on the surface, of the core 1, in this case, from the external peripheral surface. This allows the pins 11 and 12 to penetrate into the constituent material in which they are trapped after cooling.
  • Another method consists in applying ultrasound to the assembly in progress to induce a surface heating causing a softening of the core 1.
  • the insulating core can be produced quickly, in large series and at very low cost, by molding in an installation parallel to an execution chain of the collecting ferrules 7 and 8.
  • the manufacture of the ferrules can be obtained quickly in large series, by means of an automatic installation receiving ferrules obtained in any suitable manner on which the conductors are soldered and cut from a continuous supply.
  • the manufacture and obtaining of a slip ring according to the invention can then be ensured by automatic mounting of the ferrules 7 and 8 on a ring 1 previously heated.
  • a slip ring from to respond to the function it must assume.
  • the essential function of such a ring is to allow electrical contact between the ferrules 7 and 8 and brushes, wipers or coals. This function is effectively assumed, given that the ferrules are made axially and angularly integral with the core by the pins 11-12 and by the collaboration between the conductors 9 and 10 and the housings 2, 3 and 6.
  • a peripheral molding a bead or a bead 13 of insulating material.
  • a molding the thickness of which can be greater than that of the ferrules, can advantageously constitute a stop limiting the axial engagement of the ferrules and represent a means making it possible to increase the length of the line of flight between the ferrules.
  • the molding 13 can be replaced by two shoulders or two beads which are axially distant from one another.
  • the molding 13 can come directly from molding or, possibly, also be the result of a discharge of the surface layer of the material constituting the core, in the case, for example, where the ferrules 7 and 8 have a diameter slightly lower than that of the peripheral surface of the core 1.
  • the engagement of the ferrules 7 and 8 is facilitated by providing chamfers 14 and 15 at the level of the transverse edges 1a and 1b. These chamfers 14 and 15 are oriented in an upward slope according to the direction of engagement and connect the transverse edges to the peripheral surface concerned, in this case the outer surface.
  • the example of construction given above relates to a slip ring intended to be fixed on the shaft of a rotor of a rotating electrical device.
  • provision may be made to fix such a slip ring at the level of the axis of a central stator surrounded by a cage-shaped rotor.
  • Fig. 4 shows an embodiment according to which the slip ring is made to be adapted, not by an axis or a shaft, but at the level of the inner periphery of a rotating cage.
  • the ferrules 7 and 8 are then provided to be attached to the internal peripheral face of the core 1.
  • the housings 2 and 3, of the same conformation as that described above, are arranged to open out. through the openings 4 and 5 at the level of the internal peripheral face of the insulating core 1.
  • the slip ring comprises two ferrules 7 and 8, having an axial measurement substantially equal to half that of the core 1, possibly after deduction of the molding 13.
  • ferrules 7 and 8 of significantly smaller axial measurement, which can be placed substantially close to the transverse edges 1a and 1 or, on the contrary, be placed away from them by an identical, or even different, measurement , as regards the two ferrules.
  • a slip ring comprising more than two ferrules 7 and 8.
  • a construction with three slip ferrules then involves a ferrule 7, called the extreme, a ferrule 8, called the central, and a third ferrule occupying the homologous position of the ferrule 7 relative to the ferrule 8.
  • the housings necessary for the engagement of the conductors are angularly offset by 120 °.
  • two of these housings are extended by a hole 6 so that all of the conductors protrude from the same transverse edge.
  • the shell homologous to the shell 7 involves mounting means similar to those of the latter.

Landscapes

  • Manufacturing Of Electrical Connectors (AREA)
  • Motor Or Generator Current Collectors (AREA)
  • Manufacture Of Motors, Generators (AREA)
  • Microwave Tubes (AREA)
  • Control Of Vending Devices And Auxiliary Devices For Vending Devices (AREA)
EP82420175A 1981-12-08 1982-12-07 Procédé de fabrication d'une bague collectrice pour appareil électrique du type tournant Expired EP0081445B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT82420175T ATE16739T1 (de) 1981-12-08 1982-12-07 Verfahren zur herstellung eines schleifringes fuer eine elektrische anordnung des umlauftypes.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR8123324A FR2517892A1 (fr) 1981-12-08 1981-12-08 Bague collectrice pour appareil electrique du type tournant
FR8123324 1981-12-08

Publications (2)

Publication Number Publication Date
EP0081445A1 EP0081445A1 (fr) 1983-06-15
EP0081445B1 true EP0081445B1 (fr) 1985-11-27

Family

ID=9264990

Family Applications (1)

Application Number Title Priority Date Filing Date
EP82420175A Expired EP0081445B1 (fr) 1981-12-08 1982-12-07 Procédé de fabrication d'une bague collectrice pour appareil électrique du type tournant

Country Status (5)

Country Link
EP (1) EP0081445B1 (es)
AT (1) ATE16739T1 (es)
DE (1) DE3267716D1 (es)
ES (1) ES518016A0 (es)
FR (1) FR2517892A1 (es)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2710199B1 (fr) * 1993-09-16 1995-12-08 Valeo Equip Electr Moteur Collecteur rapporté pour alternateur notamment de véhicule automobile.
CN113752466B (zh) * 2021-09-18 2023-08-01 徐洪杰 一种导电滑环中轴的注塑工艺

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2202995B2 (de) * 1972-01-22 1975-09-18 Kautt & Bux Ohg, 7000 Stuttgart Verfahren zur Herstellung eines Schleifringkörpers
FR2458921A1 (fr) * 1979-06-11 1981-01-02 Dahl Paul Com Fab Bague collectrice et procede de fabrication de celle-ci

Also Published As

Publication number Publication date
DE3267716D1 (en) 1986-01-09
ES8308655A1 (es) 1983-09-01
ATE16739T1 (de) 1985-12-15
EP0081445A1 (fr) 1983-06-15
FR2517892A1 (fr) 1983-06-10
FR2517892B1 (es) 1984-11-16
ES518016A0 (es) 1983-09-01

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