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WO1988008625A1 - Attache de raccordement pour fil a aimant - Google Patents

Attache de raccordement pour fil a aimant Download PDF

Info

Publication number
WO1988008625A1
WO1988008625A1 PCT/US1988/000776 US8800776W WO8808625A1 WO 1988008625 A1 WO1988008625 A1 WO 1988008625A1 US 8800776 W US8800776 W US 8800776W WO 8808625 A1 WO8808625 A1 WO 8808625A1
Authority
WO
WIPO (PCT)
Prior art keywords
wire
grooves
crimp
ribs
receptacle
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.)
Ceased
Application number
PCT/US1988/000776
Other languages
English (en)
Inventor
Henry H. Heimbrock
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.)
Standex International Corp
Original Assignee
Standex International Corp
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 Standex International Corp filed Critical Standex International Corp
Publication of WO1988008625A1 publication Critical patent/WO1988008625A1/fr
Priority to KR1019880701699A priority Critical patent/KR890700936A/ko
Priority to DK719688A priority patent/DK719688A/da
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

Links

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
    • H01R4/00—Electrically-conductive connections between two or more conductive members in direct contact, i.e. touching one another; Means for effecting or maintaining such contact; Electrically-conductive connections having two or more spaced connecting locations for conductors and using contact members penetrating insulation
    • H01R4/24—Connections using contact members penetrating or cutting insulation or cable strands
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
    • H01R4/00—Electrically-conductive connections between two or more conductive members in direct contact, i.e. touching one another; Means for effecting or maintaining such contact; Electrically-conductive connections having two or more spaced connecting locations for conductors and using contact members penetrating insulation
    • H01R4/24—Connections using contact members penetrating or cutting insulation or cable strands
    • H01R4/2495—Insulation penetration combined with permanent deformation of the contact member, e.g. crimping

Definitions

  • This invention relates to a connector clip, and more particularly, to a connector clip to be connected to magnet wire.
  • Magnet wire is single strand wire that is stiff and is coated with an insulative material. Its principal use is in windings for motors, magnets and the like wherein it is desirable to compact as many wire turns as possible in a small space.
  • the wire is insulated with a varnish that enables strands to be wound upon strands while- main ⁇ taining an insulative barrier between adjacent strands.
  • the clips to be connected to such wire have a receptacle that is to be forced upon a pin to provide electrical contact and a ferrule that clamps about the wire.
  • the ferrule normally has two sections: a crimp section adjacent the receptacle that is to clamp upon the wire and make electrical connection with respect to it, and a clamp for the insulation surrounding the wire.
  • These clips may be mounted in a cluster assembly wherein three equiangularly-spaced clips are mounted in a cluster block, the clips being connected directly to the magnet wire from a motor used in a hermetically-sealed compressor.
  • the problem presented by the magnet wire and clip combination has been the making of good electrical contact between the clip and the magnet wire.
  • a conventional wire-engaging clamp when clamped upon magnet wire, remains insulated for failure to penetrate the insulative coating.
  • One solution to the problem has been to provide apparatus for applying to the wire an insulative sleeve and using a laser beam to cut that insulative sleeve. The laser beam is also used to burn off the insulation at the end of the wire. That apparatus is expensive and does not always work reliably.
  • An objective of the present invention has been to provide a clip having a crimp section that makes good electrical contact with the magnet wire when it is clamped onto the wire in a conventional way.
  • the objective of the invention is attained by providing, on the wire-engaging surface of the crimp section, a series of transverse serrations or alternating ribs and grooves.
  • the ribs penetrate the insulation when the crimp section is applied to a magnet wire and thus provide electrical contact as well as a good grip on the wire.
  • the ribs must have side walls lying at an angle of about 20° to a trans ⁇ verse plane perpendicular to the crimp section.
  • Another feature of the invention resides in making the grooves adjacent the receptacle deeper than the grooves at the other end of the crimp section with the depth of the grooves gradually becoming more shallow as the grooves become more remote from the receptacle.
  • This tapering of the groove depth permits the deeper grooved section to penetrate deeply into the wire to form the best electrical contact. That deep penetration, however, would tend to weaken the wire if applied uniformly so that the wire might not stay attached to the clip.
  • the shallower grooves, remote from the receptacle provide less contact by a less damaging grip to the wire so that the wire is securely held to the clip by the shallower section.
  • burrs are inevitably left on the corners of the ribs. Normally, such burrs would be cleaned away but, in accordance with the present invention, it has been found that those burrs improve the insulation stripping function of the ribs to provide good electrical contact.
  • at least the crimp section of the clip is plated with tin to a thickness in the range of 0.0001 inch - 0.0003 inch. It has been found that this post-plating, although an expensive operation, has been necessary in order to obtain a satisfactorily consistent millivolt drop across the connection.
  • the plating not only protects against the oxidation of the phosphor bronze from which the clips are formed, but additionally assists in the formation of a mechanical bond which is free of oxygen and permits a tin migration to form a chemical bond as well as the mechanical bond.
  • Fig. 1 is a perspective view of a clip formed in accordance with the present invention
  • Fig. 2 is a cross-sectional view taken along lines 2-2 of Fig. 1;
  • Fig. 3 is a perspective view of the clip applied to magnetic wire.
  • Fig. 4 is a cross-sectional view taken along lines 4-4 of Fig. 3.
  • the clip of the present invention is shown at 10 in Fig. 1. It has a receptacle 11 and a ferrule 12.
  • the receptacle has an opening 13 through which a pin passes by which the clip makes electrical contact to a power source.
  • the ferrule has a crimp section 15 and an insulation gripping section 16. ⁇ The ferrule is adapted to receive one or two magnet wires.
  • the crimp section is best illustrated in Fig. 2. It has a series of transverse grooves 20 alternating with ribs 21.
  • the grooves and ribs are tin plated with a thickness in the range of 0.0001 inch - 0.0003 inch indicated at 22.
  • the burrs 23 created on the corners of the ribs in the serrating process are left on the ribs to provide assistance in penetrating through the insulative coating of the magnet wire.
  • Each rib is trapezoidal in cross section to provide sides 24. The sides lie at an angle of about 20° to a transverse plane 26 perpendicular to the crimp section.
  • the grooves at the receptacle end are deeper than the grooves adjacent the insulation gripping section 16.
  • the grooves are about from .006 inch - .007 inch deep.
  • the grooves at the shallow end are .002 inch - .003 inch deep.
  • the grooves are on .020 inch centers.
  • the grooves are about .010 inch wide.
  • Fig. 4 The operation in clamping about a wire is illustrated in Fig. 4.
  • the ribs in penetrating into the wire during the crimping operation, bite off a chunk of insulation as indicated at 30 in Fig. 4, the insulation being carried by the top 31 of the rib below the original surface of the wire.
  • the shearing away of that insulation causes the wire to be bared along the sides of the rib and to create an intimate electrical contact at the interface between the rib and wire indicated at 32.
  • the penetration is deep in order to provide the good electrical contact. That depth of penetration, however, tends to weaken the wire.
  • the grooves are shallow so that the penetration is not as deep. While there is a sacrifice of electrical contact, there is a gain in the strength of the wire so that the wire will always be held tightly gripped by the clip.

Landscapes

  • Connections Effected By Soldering, Adhesion, Or Permanent Deformation (AREA)
  • Connections By Means Of Piercing Elements, Nuts, Or Screws (AREA)

Abstract

Une attache de raccordement (10) possède une section de sertissage (15) dont la surface (20, 21) d'engagement du fil est crénelée pour mordre au travers de l'isolation sur le fil à aimant.
PCT/US1988/000776 1987-04-27 1988-03-10 Attache de raccordement pour fil a aimant Ceased WO1988008625A1 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
KR1019880701699A KR890700936A (ko) 1987-04-27 1988-12-21 자기 와이어용 접속클립
DK719688A DK719688A (da) 1987-04-27 1988-12-23 Kabelsko til entraadet ledning

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US4285087A 1987-04-27 1987-04-27
US042,850 1987-04-27

Publications (1)

Publication Number Publication Date
WO1988008625A1 true WO1988008625A1 (fr) 1988-11-03

Family

ID=21924079

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/US1988/000776 Ceased WO1988008625A1 (fr) 1987-04-27 1988-03-10 Attache de raccordement pour fil a aimant

Country Status (4)

Country Link
EP (1) EP0360808A1 (fr)
JP (1) JPH02503726A (fr)
KR (1) KR890700936A (fr)
WO (1) WO1988008625A1 (fr)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2007078257A1 (fr) * 2005-12-30 2007-07-12 Nanyang Polytechnic Cosses pour ligne de bus
DE102010039655A1 (de) * 2010-08-23 2012-02-23 Tyco Electronics Amp Gmbh Elektrische Verbindungsklemme sowie Verfahren und Vorrichtung zum Herstellen einer elektrischen Verbindungsklemme
CN103053077A (zh) * 2010-08-04 2013-04-17 矢崎总业株式会社 压接式端子
EP2960996A1 (fr) * 2014-06-27 2015-12-30 Tyco Electronics (Shanghai) Co. Ltd. Boîte de raccordement photovoltaïque

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP5675205B2 (ja) 2010-08-05 2015-02-25 矢崎総業株式会社 圧着端子

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3579178A (en) * 1969-12-04 1971-05-18 Amp Inc Electrical terminal and housing therefore
US3735331A (en) * 1972-04-19 1973-05-22 Ark Les Switch Corp Electrical connector
US4003623A (en) * 1974-09-12 1977-01-18 Amp Incorporated Wire securing member with varying serrations

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3579178A (en) * 1969-12-04 1971-05-18 Amp Inc Electrical terminal and housing therefore
US3735331A (en) * 1972-04-19 1973-05-22 Ark Les Switch Corp Electrical connector
US4003623A (en) * 1974-09-12 1977-01-18 Amp Incorporated Wire securing member with varying serrations

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2007078257A1 (fr) * 2005-12-30 2007-07-12 Nanyang Polytechnic Cosses pour ligne de bus
CN103053077A (zh) * 2010-08-04 2013-04-17 矢崎总业株式会社 压接式端子
EP2602876A4 (fr) * 2010-08-04 2014-01-08 Yazaki Corp Borne à sertir
US8858275B2 (en) 2010-08-04 2014-10-14 Yazaki Corporation Crimp-style terminal
CN103053077B (zh) * 2010-08-04 2015-03-25 矢崎总业株式会社 压接式端子
DE102010039655A1 (de) * 2010-08-23 2012-02-23 Tyco Electronics Amp Gmbh Elektrische Verbindungsklemme sowie Verfahren und Vorrichtung zum Herstellen einer elektrischen Verbindungsklemme
US8979601B2 (en) 2010-08-23 2015-03-17 Tyco Electronics Amp Gmbh Electric connecting terminal as well as method and device for producing an electric connecting terminal
EP2960996A1 (fr) * 2014-06-27 2015-12-30 Tyco Electronics (Shanghai) Co. Ltd. Boîte de raccordement photovoltaïque

Also Published As

Publication number Publication date
JPH02503726A (ja) 1990-11-01
EP0360808A1 (fr) 1990-04-04
KR890700936A (ko) 1989-04-28

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