JP3895829B2

JP3895829B2 - Crimp terminal connection fixing structure

Info

Publication number: JP3895829B2
Application number: JP16151997A
Authority: JP
Inventors: 満治久保田; 正治坂口; 雄二正木; 清人福田
Original assignee: Yazaki Corp
Current assignee: Yazaki Corp
Priority date: 1997-06-18
Filing date: 1997-06-18
Publication date: 2007-03-22
Anticipated expiration: 2017-06-18
Also published as: JPH117991A

Description

【０００１】
【発明の属する技術分野】
本発明は、ヒュージブルリンクボックス等に配索されたブスバーなどの相手側の接続端子板部又は接続端子部にねじ締め固定される圧着端子の接続固定構造に関するものである。
【０００２】
【従来の技術】
図９において、１は圧着端子を示し、この圧着端子１は電気接触部２と電線接続部３とが首部４を介して一体に形成されて成る。電気接触部２には中央にねじ挿通孔５が穿設され、電線接続部３には電線６に対する導体加締部７及び絶縁被覆加締部８が設けられ、両加締部７，８を加締めて電線６を圧着する。
【０００３】
上記圧着端子１は、例えば図１０に示される如く、ヒュージブルリンクボックス９にねじ締め固定されている。ヒュージブルリンクボックス９は、複数のヒュージブルリンク１０を収容する収容室９ａを有し、その両側壁にはロック手段を備えた側蓋９ｂ，９ｂ′が設けられている。側蓋９ｂ，９ｂ′を開けることにより、上記圧着端子１と同一構成のオルタネータ圧着端子１２及び負荷側端子１３がブスバー１１を介して各収容室９ａに挿着されたヒュージブルリンク１０の接続端子１０ａ，１０ａ′と接続固定される。図中１０ｂは前記接続端子１０ａのねじ挿通孔、１１ａはブスバー１１のねじ挿通孔を示す。
【０００４】
ヒュージブルリンクボックス９におけるヒュージブルリンク１０とブスバー１１、圧着端子１２及び負荷側端子１３との接続には、締付金具１５が用いられる。締付金具１５は、基板部１５ａにネジ筒１５ｂを立設して成り、基板部１５ａをヒュージブルリンクボックス９の内部中央隔壁（図示しない）に面してセットし、ネジ筒１５ｂに接続端子１０ａとブスバー１１及び圧着端子１２を重ね、ボルト１４の締付けにより固定される。１５ｃはねじ孔を示している。
【０００５】
【発明が解決しようとする課題】
上記従来技術にあっては、圧着端子をボルトにより締付固定した後、長期使用された場合等において、エンジンの振動や走行中の振動などによりボルトが緩んでしまうと、圧着端子との電気的な接続が遮断されたりする接触不良を生じ、稼動中の電気機器等に悪影響を与え、最悪の場合には、走行中に車両事故をひきおこしてしまうことになる。
【０００６】
一方、組付作業の際、ボルトを最終位置まで完全に締め付けなかったりすると、上述のような事態を招く確率が更に高くなってしまう。
【０００７】
本発明は上記問題点を解決するため、圧着端子が常に相手側の接続端子部等と良好な状態で接触し得る圧着端子の接続固定構造を提供することを課題とする。
【０００８】
【課題を解決するための手段】
上記課題を解決するため本発明により成された圧着端子の接続固定構造は、請求項１に記載されたように、ねじ挿通孔を有する電気接触部と電線を圧着接続する電線接続部とが首部を介して一体に形成された圧着端子と、ねじ挿通孔を設けた相手側の接続端子板部とをねじ締め固定する圧着端子の接続固定構造において、前記電気接触部には断面三日月状の可撓弾性を有する湾曲接続片を設け、前記接続端子板部のねじ挿通孔周縁にはバルジ状の湾曲壁を形成し、前記圧着端子は、前記湾曲壁内に前記湾曲接続片が侵入して、前記湾曲接続片が前記湾曲壁の内面を押圧する力を生じて、前記湾曲接続片の外面と前記湾曲壁の内面とが密に重なった状態でねじ締め固定される構造を採用した。
【０００９】
前記湾曲接続片を前記電気接触部の周縁に端子の軸方向に沿う両側に相対向して設けることが好適である（請求項２）。
【００１０】
前記湾曲接続片を前記電気接触部の周縁から一体に菊座状に複数個設けることが好適である（請求項３）。
【００１１】
前記湾曲壁の曲率半径は前記湾曲接続片の曲率半径よりも僅かに小さく形成されることが好ましい（請求項４）。
【００１２】
前記接続端子板部はブスバーであって、ヒュージブルリンクボックスに備えられ、該ヒュージブルリンクボックスに挿着されたねじ挿通孔を有するヒュージブルリンクの接続端子が共にねじ締め固定されることが好ましい（請求項５）。
【００１３】
上記課題を解決するため本発明により成された圧着端子の接続固定構造は、請求項６に記載されたように、ねじ挿通孔を有する電気接触部と電線を圧着接続する電線接続部とが首部を介して一体に形成された圧着端子と、ねじ挿通孔を設けた１以上の相手側の接続端子部とをボルト及びナットで締付固定する圧着端子の接続固定構造において、前記電気接触部には前記ねじ挿通孔の周縁に該ねじ挿通孔の軸方向に沿う短冊状の係止片を複数個設け、前記ナットには前記接続端子部との対向面に断面Ｕ字状の受溝を前記ナットのねじ孔の周囲に形成し、前記圧着端子は前記相手側のねじ挿通孔に前記係止片を挿通し、該係止片を前記受溝の溝壁に沿って外側に拡がる方向に塑性変形させると共に該係止片が前記受溝の溝壁と密に重なって前記接続端子部を前記係止片の端部と前記電気接触部との間に挟んだ状態でねじ締め固定される構造を採用した。
【００１４】
前記接続端子部はブスバーとヒュージブルリンクの接続端子であって、該ブスバーは前記ナットと共にヒュージブルリンクボックスに備えられ、前記接続端子はヒュージブルリンクの挿着により前記ブスバーとナットとの間に挿入され、前記電気接触部が前記ブスバーと接続端子とを重ねた状態でねじ締め固定されると共に、前記係止片が前記接続端子と係合することが好ましい（請求項７）。
【００１５】
上記課題を解決するため本発明により成された圧着端子の接続固定構造は、請求項８に記載されたように、ねじ挿通孔を有する電気接触部と電線を圧着接続する電線接続部とが首部を介して一体に形成された圧着端子と、ねじ挿通孔を設けた１以上の相手側の接続端子部とをボルト及びナットで締付固定する圧着端子の接続固定構造において、前記電気接触部はテーパ状のリング体に形成され、該リング体の大きな開口部に複数のスリット状の切り欠き溝を設けて短冊状の接触片を形成し、該複数個の接触片のうち１つの接触片の先端に前記首部が連成され、前記接続端子部には前記ねじ挿通孔の周縁に円筒状の筒体を設け、前記ボルトには頭部と胴体軸部との間に前記リング体の内壁に係合する鍔部を形成し、前記圧着端子は前記筒体に前記リング体を嵌入し、前記ボルトの鍔部が前記複数の接触片の先端を拡開して前記筒体の内壁に係合させた状態でねじ締め固定される構造を採用した。
【００１６】
前記リング体の大きな開口部側の外径は前記筒体の内径よりも僅かに小さく形成されることが好ましい（請求項９）。
【００１７】
前記接続端子部はブスバーとヒュージブルリンクの接続端子であって、ヒュージブルリンクボックスに備えられ、前記ブスバーには前記筒体を形成し、該筒体の開口部から臨む前記接続端子に前記リング体の小さな開口部近傍を係合することが好ましい（請求項１０）。
【００１８】
【発明の実施の形態】
以下、本発明の一実施の形態を図面に基づいて説明する。図１は本発明の圧着端子の接続固定構造の一実施の形態を示す斜視図であり、図２は圧着端子の電気接触部の背面図である。また、図３は図１に示した圧着端子が接続固定される状態を示す断面図である。尚、従来例と同一の構成には同一符号を付し、その詳細な説明を省略する。
【００１９】
図１において、圧着端子２１は自動車用丸形板端子であって、丸形板状の電気接触部２２と、電線６を圧着接続する電線接続部２３とが首部２４を介して一体に形成されている。この圧着端子２１は、通常、銅または銅合金（ベリリウム−銅、黄銅等）などの弾性を有する金属薄板からプレス加工によって製造される。
【００２０】
電気接触部２２には、その中央にボルト１４を挿通するねじ挿通孔２５が穿設され、電気接触部２２の周縁には、端子２１の軸方向に沿う両側に相対向する一対の湾曲接続片２６，２６が下向きに設けられている。湾曲接続片２６は断面形状が三日月状に湾曲し、可撓弾性を有する。
【００２１】
圧着端子２１は従来例と同様にヒュージブルリンクボックス９（図１０参照）のブスバー１１などとねじ締め固定される。そのブスバー１１の各ねじ挿通孔１１ａの周縁に湾曲接続片２６，２６に対応するバルジ状の湾曲壁２７を形成する。湾曲壁２７の開口部２７ａの直径は一対の湾曲接続片２６，２６の先端部の間隔よりも広く、湾曲壁２７の内壁の曲率半径は湾曲接続片２６の外壁の曲率半径よりも僅かに小さく形成されている。
【００２２】
上記構成において、圧着端子２１の接続過程を説明すると、図３（ａ）に示される如く、まず、圧着端子２１を相手側の接続端子板部となるブスバー１１の湾曲壁２７に対応するようにセットする。
【００２３】
この状態から、電気接触部２２のねじ挿通孔２５近傍の平らな面を図示しない手又は組付治具で強く押し付け、湾曲壁２７内に湾曲接続片２６，２６を嵌着させる。即ち、湾曲壁２７の開口部２７ａに対し、湾曲接続片２６，２６が内側に撓みつつ通過し、湾曲接続片２６，２６が復元すると、湾曲壁２７の内壁にしっかりと嵌着する。湾曲接続片２６の曲率半径の方が大きいため、嵌着した後、湾曲壁２７を押し付ける力が強くなると共に、湾曲壁２７内で湾曲接続片２６がガタつくことがない。
【００２４】
次に、電気接触部２２側からボルト１４をねじ挿通孔２５に挿通し、湾曲壁２７内とヒュージブルリンク１０の接続端子１０ａのねじ挿通孔１０ｂを通してねじ筒１５ｂのねじ孔１５ｃに締め付けてゆくと、図３（ｂ）に示される如く、湾曲接続片２６，２６の先端がボルト１４の締め付け方向に押し付けられる。これにより、湾曲接続片２６，２６の中間部分が外方に向けて撓もうとし、図中矢線で示すような力Ｆが湾曲壁２７にかかる。従って、圧着端子２１は十分な接触を確保することができる。
【００２５】
以上説明したような状態で圧着端子２１は接続固定されているので、仮にボルト１４が緩んだとしても、圧着端子２１のブスバー１１に対する接触が十分に成されており、従来の圧着端子の接続構造による欠点を除去することができる。
【００２６】
図４は図２に対する湾曲接続片２６の別の形態を示す図である。湾曲接続片２６′は電気接触部２２の周縁に等間隔で菊座状に複数個設けられており、前述の湾曲壁２７に嵌入する際、各湾曲接続片２６′はその幅が狭いため撓ませる荷重が小さく、作業性を向上させることができる。このように、湾曲接続片は図２に示すような電気接触部２２の両側縁に形成することのみに限定するものではない。
【００２７】
図５及び図６は本発明の圧着端子の接続固定構造の他の実施の形態を示すものである。
【００２８】
図５において、圧着端子２１′は電気接触部２２のねじ挿通孔２５の内周縁に該ねじ挿通孔２５の軸方向に沿う複数の短冊状の係止片２８が周設されている。
【００２９】
複数の係止片２８は、圧着端子２１′を金属薄板からプレス加工する際、電気接触部２２の中央を深絞り加工し、その底部を打ち抜いた後に複数の切り欠き溝を設けて形成する。
【００３０】
圧着端子２１′は、ブスバー１１と締付金具１５′を備えるとともにこれらブスバー１１と締付金具１５′との間にヒュージブルリンク１０の接続端子１０ａが挿着されたヒュージブルリンクボックス９（図１０参照）にねじ締め固定される。締付金具１５′は基板部１５ａにねじ孔１５ｃを有するねじ筒１５ｂを立設して成り、ネジ筒１５ｂの接続端子１０ａとの対向面には、ねじ孔１５ｃの周囲に複数の係止片２８を屈曲変形させる断面Ｕ字状の受溝２９を周設する。
【００３１】
上記構成において、圧着端子２１′の接続過程を説明すると、図６（ａ）に示される如く、圧着端子２１′の複数の係止片２８を相手側の接続端子部となるブスバー１１及びヒュージブルリンク１０のねじ挿通孔１１ａ及び１０ｂに挿通できるようにセットする。
【００３２】
次に、図６（ｂ）に示される如く、ねじ挿通孔１１ａ側から圧着端子２１′の複数の係止片２８を挿通すると、係止片２８は締付金具１５′の受溝２９に当接する。この状態で、ボルト１４を電気接触部２２側から挿通してねじ孔１５ｃに締め付けてゆくと、図６（ｃ）に示される如く、ボルト１４の締め付け力によって各係止片２８は受溝２９の溝壁に沿って塑性変形し、各係止片２８の先端が電気接触部２２に向けてブスバー１１と接続端子１０ａとを挟み込むように係止する。これにより、圧着端子２１′はブスバー１１と接続端子１０ａとにしっかりと接続固定される。
【００３３】
従って、仮にボルト１４が緩んでも、前述の実施形態の圧着端子２１と同様に、相手側の接続端子部との接触が十分に成され、従来の圧着端子の接続固定構造による欠点を除去することができる。
【００３４】
図７及び図８は本発明の圧着端子の接続固定構造の更に別の実施の形態を示すものである。
【００３５】
図７において、圧着端子２１″の電気接触部２２′はテーパ状のリング体３０に形成されている。即ち、大小２つの開口部３０ａ，３０ｂを有するテーパ状の周壁を形成して成り、一方の大きな開口部３０ａにはスリット状の切り欠き溝３０ｃが等間隔で設けられて接触片３１が複数個形成される。各接触片３１のうちの１つの接触片３１ａの先端には、首部２４が連成されている。
【００３６】
ブスバー１１には、各ねじ挿通孔１１ａの周縁にリング体３０が嵌入する円筒状の筒体３２を設ける。筒体３２の内径はリング体３０の最大となる外径、即ち、大きな開口部３０ａ近傍の外径よりも僅かに大きく形成されている。
【００３７】
ボルト３３は頭部３３ａと胴体軸部３３ｂとの間に鍔部３３ｃが設けられたものを使用する。鍔部３３ｃの直径はリング体３０の大きな開口部３０ａの径よりも小さく、小さな開口部３０ｂの径よりも大きく形成されている。
【００３８】
上記構成において、圧着端子２１″の接続過程を説明すると図８（ａ）に示される如く、圧着端子２１″のリング体３０を相手側の接続端子部となるブスバー１１の筒体３２に嵌入できるようにセットする。
【００３９】
次に、筒体３２にリング体３０を嵌入し、ボルト３３を大きな開口部３０ａ側から挿通してねじ筒１５ｂに締め付けてゆくと、鍔部３３ｃがリング体３０の内壁、即ち、複数の接触片３１と係合し、各接触片３１は鍔部３３ｃによって拡開されてリング体３０は筒体３２の内壁にしっかりと嵌着（図８（ｂ）及び図８（ｃ））する。一方、リング体３０の小さな開口部３０ｂはヒュージブルリンク１０の接続端子１０ａと係合する。
【００４０】
従って、仮にボルト３３が緩んでも、各接触片３１の先端が拡開されて筒体３２の内壁と係合しているので、接触が十分に確保され、従来の圧着端子の接続構造による欠点を除去することができる。
【００４１】
【発明の効果】
上記した如くに、請求項１の本発明は、ねじ挿通孔を有する電気接触部と電線を圧着接続する電線接続部とが首部を介して一体に形成された圧着端子と、ねじ挿通孔を設けた相手側の接続端子板部とをねじ締め固定する圧着端子の接続固定構造において、前記電気接触部には断面三日月状の可撓弾性を有する湾曲接続片を設け、前記接続端子板部のねじ挿通孔周縁にはバルジ状の湾曲壁を形成し、前記圧着端子は前記湾曲壁に前記湾曲接続片を嵌着した状態でねじ締め固定されるものであるから、圧着端子が常に相手側の接続端子板部と良好な状態で接触することができる。
【００４２】
請求項２の本発明は、前記湾曲接続片を前記電気接触部の周縁に端子の軸方向に沿う両側に相対向して設けるものであるから、簡単な構造であって加工性も良く、十分な接触も得ることができる。
【００４３】
請求項３の本発明は、前記湾曲接続片を前記電気接触部の周縁から一体に菊座状に複数個設けるものであるから、各湾曲接続片を撓ませるための荷重を小さくすることができ、作業性の向上を図ることができる。
【００４４】
請求項４の本発明は、前記湾曲壁の曲率半径は前記湾曲接続片の曲率半径よりも僅かに小さく形成されるものであるから、各湾曲接続片を嵌入した後の接触安定性を確保することができる。
【００４５】
請求項５の本発明は、前記接続端子板部はブスバーであって、ヒュージブルリンクボックスに備えられ、該ヒュージブルリンクボックスに挿着されたねじ挿通孔を有するヒュージブルリンクの接続端子が共にねじ締め固定されるものであるから、ヒュージブルリンクボックスにおける圧着端子の接続は、常に良好な状態でブスバー等と接触することになる。
【００４６】
請求項６の本発明は、ねじ挿通孔を有する電気接触部と電線を圧着接続する電線接続部とが首部を介して一体に形成された圧着端子と、ねじ挿通孔を設けた１以上の相手側の接続端子部とをボルト及びナットで締付固定する圧着端子の接続固定構造において、前記電気接触部には前記ねじ挿通孔の周縁に該ねじ挿通孔の軸方向に沿う短冊状の係止片を複数個設け、前記ナットには前記接続端子部との対向面に断面Ｕ字状の受溝を前記ナットのねじ孔の周囲に形成し、前記圧着端子は前記相手側のねじ挿通孔に前記係止片を挿通し、該係止片を前記受溝の溝壁に沿って塑性変形させると共に該係止片の端部を前記接続端子部に係合した状態でねじ締め固定されるものであるから、圧着端子が常に相手側の接続端子部と良好な状態で接触することができる。
【００４７】
請求項７の本発明は、前記接続端子部はブスバーとヒュージブルリンクの接続端子であって、該ブスバーは前記ナットと共にヒュージブルリンクボックスに備えられ、前記接続端子はヒュージブルリンクの挿着により前記ブスバーとナットとの間に挿入され、前記電気接触部が前記ブスバーと接続端子とを重ねた状態でねじ締め固定されると共に、前記係止片が前記接続端子と係合するものであるから、ヒュージブルリンクボックスにおける圧着端子の接続は、常に良好な状態でブスバー等と接触することになる。
【００４８】
請求項８の本発明は、ねじ挿通孔を有する電気接触部と電線を圧着接続する電線接続部とが首部を介して一体に形成された圧着端子と、ねじ挿通孔を設けた１以上の相手側の接続端子部とをボルト及びナットで締付固定する圧着端子の接続固定構造において、前記電気接触部はテーパ状のリング体に形成され、該リング体の大きな開口部に複数のスリット状の切り欠き溝を設けて短冊状の接触片を形成し、該複数個の接触片のうち１つの接触片の先端に前記首部が連成され、前記接続端子部には前記ねじ挿通孔の周縁に円筒状の筒体を設け、前記ボルトには頭部と胴体軸部との間に前記リング体の内壁に係合する鍔部を形成し、前記圧着端子は前記筒体に前記リング体を嵌入し、前記ボルトの鍔部が前記複数の接触片を拡開した状態でねじ締め固定されるものであるから、圧着端子が常に相手側の接続部と良好な状態で接触することができる。
【００４９】
請求項９の本発明は、前記リング体の大きな開口部側の外径は前記筒体の内径よりも僅かに小さく形成されるものであるから、各接触片の先端はボルトの鍔部によって筒体の内壁に向けて容易に拡開し、十分な接触を得ることができる。
【００５０】
請求項１０の本発明は、前記接続端子部はブスバーとヒュージブルリンクの接続端子であって、ヒュージブルリンクボックスに備えられ、前記ブスバーには前記筒体を形成し、該筒体の開口部から臨む前記接続端子に前記リング体の小さな開口部近傍を係合するものであるから、ヒュージブルリンクボックスにおける圧着端子の接続は、常に良好な状態でブスバー等と接触することになる。
【図面の簡単な説明】
【図１】本発明による圧着端子の接続固定構造の一実施の形態を示す斜視図である。
【図２】図１の圧着端子の湾曲接続片の配置状態を示す背面図である。
【図３】（ａ）図１のねじ締め固定前の状態を示す断面図である。
（ｂ）図１のねじ締め固定されている状態を示す断面図である。
【図４】図２に対する別の形態を示す背面図である。
【図５】本発明による圧着端子の接続固定構造の他の一実施の形態を示す斜視図である。
【図６】（ａ）図５のねじ締め固定前の状態を示す断面図である。
（ｂ）図５のねじ締め直前の状態を示す断面図である。
（ｃ）図５のねじ締め固定されている状態を示す断面図である。
【図７】本発明による圧着端子の接続固定構造の更に別の一実施の形態を示す斜視図である。
【図８】（ａ）図７のねじ締め固定前の状態を示す断面図である。
（ｂ）図７のねじ締め固定されている状態を示す断面図である。
（ｃ）（ｂ）の斜視図である。
【図９】従来の圧着端子を示す斜視図である。
【図１０】従来の圧着端子の接続固定構造を示す斜視図である。
【符号の説明】
１，２１，２１′，２１″ 圧着端子
２，２２電気接触部
３，２３電線接続部
４，２４首部
５，１０ｂ，１１ａ，２５ねじ挿通孔
９ヒュージブルリンクボックス
１０ヒュージブルリンク
１０ａ接続端子
１１ブスバー
１４，３３ボルト
１５，１５′ 締付金具
２６湾曲接続片
２７湾曲壁
２８係止片
２９受溝
３０リング体
３１接触片
３２筒体
３３ｃ鍔部[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a connection fixing structure of a crimp terminal that is screwed to a connection terminal plate portion or a connection terminal portion on the other side such as a bus bar arranged in a fusible link box or the like.
[0002]
[Prior art]
In FIG. 9, reference numeral 1 denotes a crimp terminal. The crimp terminal 1 is formed by integrally forming an electrical contact portion 2 and a wire connection portion 3 via a neck portion 4. The electrical contact portion 2 is provided with a screw insertion hole 5 in the center, and the wire connection portion 3 is provided with a conductor crimping portion 7 and an insulation coating crimping portion 8 for the electric wire 6. The electric wire 6 is crimped by crimping.
[0003]
The crimp terminal 1 is screwed and fixed to the fusible link box 9 as shown in FIG. The fusible link box 9 has an accommodating chamber 9a for accommodating a plurality of fusible links 10, and side lids 9b and 9b 'having locking means are provided on both side walls thereof. Connecting terminals of the fusible link 10 in which the alternator crimping terminal 12 and the load-side terminal 13 having the same configuration as the above-described crimping terminal 1 are inserted into the respective accommodating chambers 9a via the bus bars 11 by opening the side lids 9b and 9b '. 10a and 10a 'are connected and fixed. In the figure, 10b denotes a screw insertion hole of the connection terminal 10a, and 11a denotes a screw insertion hole of the bus bar 11.
[0004]
For connecting the fusible link 10 to the bus bar 11, the crimp terminal 12 and the load side terminal 13 in the fusible link box 9, a fastening fitting 15 is used. The fastening bracket 15 is formed by standing a screw cylinder 15b on the board portion 15a. The board portion 15a is set facing the inner central partition wall (not shown) of the fusible link box 9, and connected to the screw cylinder 15b. The bus bar 11 and the crimp terminal 12 are overlapped with each other and fixed by tightening the bolts 14. Reference numeral 15c denotes a screw hole.
[0005]
[Problems to be solved by the invention]
In the above prior art, if the bolt is loosened due to engine vibration, running vibration, etc. when the crimp terminal is fastened with bolts and used for a long time, the electrical connection with the crimp terminal This may cause a contact failure such as disconnection of a bad connection, adversely affecting an operating electric device or the like, and in the worst case, may cause a vehicle accident during traveling.
[0006]
On the other hand, if the bolt is not completely tightened to the final position during the assembling work, the probability of causing the above situation is further increased.
[0007]
In order to solve the above-described problems, an object of the present invention is to provide a crimp terminal connection fixing structure in which a crimp terminal can always come into contact with a mating connection terminal portion or the like in good condition.
[0008]
[Means for Solving the Problems]
In order to solve the above-mentioned problems, the crimping terminal connecting and fixing structure according to the present invention is characterized in that, as described in claim 1, the electrical contact portion having a screw insertion hole and the wire connecting portion for crimping and connecting the wire are the neck portion. In the crimp terminal connection fixing structure for fixing the crimp terminal integrally formed via the screw and the mating connection terminal plate portion provided with the screw insertion hole, the electric contact portion may have a crescent-shaped cross section. A curved connection piece having flexural elasticity is provided, a bulge-shaped curved wall is formed at the periphery of the screw insertion hole of the connection terminal plate part , and the curved connection piece enters the curved wall of the crimp terminal , A structure is adopted in which the curved connecting piece generates a force that presses the inner surface of the curved wall, and is screwed and fixed in a state where the outer surface of the curved connecting piece and the inner surface of the curved wall are closely overlapped .
[0009]
It is preferable that the curved connecting pieces are provided on both sides along the axial direction of the terminal on the periphery of the electrical contact portion.
[0010]
It is preferable that a plurality of the curved connection pieces are provided integrally in the form of a chrysanthemum from the periphery of the electric contact portion.
[0011]
Preferably, the radius of curvature of the curved wall is slightly smaller than the radius of curvature of the curved connecting piece.
[0012]
The connection terminal plate portion is a bus bar, and is preferably provided in the fusible link box, and the fusible link connection terminals having screw insertion holes inserted into the fusible link box are preferably screwed together. (Claim 5).
[0013]
In order to solve the above problems, the crimping terminal connecting and fixing structure according to the present invention is such that, as described in claim 6, the electrical contact portion having a screw insertion hole and the wire connecting portion for crimping and connecting the wire are the neck portion. In a crimp terminal connection fixing structure in which a crimp terminal integrally formed with a screw and one or more mating connection terminal portions provided with screw insertion holes are fastened and fixed with bolts and nuts, Is provided with a plurality of strip-like locking pieces along the axial direction of the screw insertion hole on the periphery of the screw insertion hole, and the nut has a U-shaped receiving groove on the surface facing the connection terminal portion. The crimp terminal is formed around the screw hole of the nut, and the locking piece is inserted into the screw insertion hole on the mating side, and the locking piece is plastic in a direction extending outward along the groove wall of the receiving groove. the contact engaging pieces together to deform is superimposed over the groove wall closely the receiving groove The terminal unit employing the structure screwed fixed in a state of sandwiched between the end portion and the electrical contact portion of the locking piece.
[0014]
The connection terminal portion is a connection terminal of a bus bar and a fusible link, and the bus bar is provided in the fusible link box together with the nut, and the connection terminal is interposed between the bus bar and the nut by insertion of the fusible link. It is preferable that the electrical contact portion is screwed and fixed in a state where the bus bar and the connection terminal are overlapped, and the locking piece is engaged with the connection terminal.
[0015]
In order to solve the above problems, the crimping terminal connecting and fixing structure according to the present invention has an electrical contact portion having a screw insertion hole and a wire connecting portion for crimping and connecting an electric wire as described in claim 8. In the crimp terminal connecting and fixing structure in which the crimp terminal integrally formed via the screw and one or more mating connection terminal portions provided with screw insertion holes are fastened with bolts and nuts, the electrical contact portion is A strip-shaped contact piece is formed by providing a plurality of slit-shaped notch grooves in a large opening of the ring body, and a contact piece of one of the plurality of contact pieces is formed. The neck portion is coupled to the tip, the connecting terminal portion is provided with a cylindrical cylinder around the periphery of the screw insertion hole, and the bolt is provided on the inner wall of the ring body between the head portion and the trunk shaft portion. A hook part is formed, and the crimp terminal is placed in front of the cylindrical body. And fitting the ring member, it was adopted a structure screwed fixed in a state where the flange portion is engaged with the inner wall of the plurality of diverging the tips of the contact pieces the cylindrical body of the bolt.
[0016]
It is preferable that the outer diameter of the ring body on the side of the large opening is slightly smaller than the inner diameter of the cylindrical body (claim 9).
[0017]
The connection terminal portion is a connection terminal between a bus bar and a fusible link, and is provided in a fusible link box. The bus bar is formed with the cylindrical body, and the ring is connected to the connection terminal facing the opening of the cylindrical body. It is preferable to engage the vicinity of the small opening of the body (claim 10).
[0018]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, an embodiment of the present invention will be described with reference to the drawings. FIG. 1 is a perspective view showing an embodiment of a connection fixing structure of a crimp terminal according to the present invention, and FIG. 2 is a rear view of an electrical contact portion of the crimp terminal. FIG. 3 is a cross-sectional view showing a state where the crimp terminal shown in FIG. 1 is connected and fixed. In addition, the same code | symbol is attached | subjected to the structure same as a prior art example, and the detailed description is abbreviate | omitted.
[0019]
In FIG. 1, a crimp terminal 21 is a round plate terminal for automobiles, and a round plate-like electrical contact portion 22 and a wire connection portion 23 for crimping and connecting the electric wire 6 are integrally formed via a neck portion 24. ing. The crimp terminal 21 is usually manufactured by pressing from a thin metal plate having elasticity such as copper or a copper alloy (beryllium-copper, brass, etc.).
[0020]
A screw insertion hole 25 through which the bolt 14 is inserted is formed in the center of the electrical contact portion 22, and a pair of curved connection pieces facing each other on both sides along the axial direction of the terminal 21 are formed on the periphery of the electrical contact portion 22. 26 and 26 are provided downward. The curved connecting piece 26 is bent in a crescent shape in cross section and has flexible elasticity.
[0021]
The crimp terminal 21 is screwed and fixed to the bus bar 11 of the fusible link box 9 (see FIG. 10) as in the conventional example. A bulge-shaped curved wall 27 corresponding to the curved connection pieces 26 and 26 is formed on the periphery of each screw insertion hole 11a of the bus bar 11. The diameter of the opening 27a of the curved wall 27 is wider than the distance between the tip ends of the pair of curved connecting pieces 26, 26, and the radius of curvature of the inner wall of the curved wall 27 is slightly smaller than the radius of curvature of the outer wall of the curved connecting piece 26. Is formed.
[0022]
In the above configuration, the connection process of the crimp terminal 21 will be described. First, as shown in FIG. 3A, the crimp terminal 21 is made to correspond to the curved wall 27 of the bus bar 11 serving as the mating connection terminal plate. set.
[0023]
From this state, the flat surface in the vicinity of the screw insertion hole 25 of the electrical contact portion 22 is strongly pressed by a hand or an assembly jig (not shown), and the curved connection pieces 26 and 26 are fitted into the curved wall 27. That is, when the curved connection pieces 26 and 26 pass through the opening 27 a of the curved wall 27 while being bent inward, and the curved connection pieces 26 and 26 are restored, the curved connection pieces 26 and 26 are firmly fitted to the inner wall of the curved wall 27. Since the radius of curvature of the curved connecting piece 26 is larger, the force of pressing the curved wall 27 after fitting is increased, and the curved connecting piece 26 does not rattle within the curved wall 27.
[0024]
Next, the bolt 14 is inserted into the screw insertion hole 25 from the electric contact portion 22 side, and is tightened into the screw hole 15c of the screw cylinder 15b through the curved wall 27 and the screw insertion hole 10b of the connection terminal 10a of the fusible link 10. Then, as shown in FIG. 3B, the distal ends of the curved connecting pieces 26 and 26 are pressed in the tightening direction of the bolt 14. As a result, the intermediate portion of the curved connecting pieces 26, 26 tends to bend outward, and a force F as indicated by the arrow in the figure is applied to the curved wall 27. Therefore, the crimp terminal 21 can ensure sufficient contact.
[0025]
Since the crimp terminal 21 is connected and fixed in the state as described above, even if the bolt 14 is loosened, the contact of the crimp terminal 21 with the bus bar 11 is sufficiently made, and the conventional crimp terminal connection structure is provided. The drawbacks due to can be eliminated.
[0026]
FIG. 4 is a view showing another form of the curved connecting piece 26 with respect to FIG. A plurality of curved connection pieces 26 ′ are provided in the shape of a star in the periphery of the electric contact portion 22 at an equal interval. When the curved connection pieces 26 ′ are inserted into the curved wall 27, each curved connection piece 26 ′ is narrow and flexible. The load to be applied is small and workability can be improved. Thus, the curved connecting piece is not limited to being formed on both side edges of the electrical contact portion 22 as shown in FIG.
[0027]
5 and 6 show another embodiment of the crimping terminal connecting and fixing structure of the present invention.
[0028]
In FIG. 5, the crimp terminal 21 ′ is provided with a plurality of strip-shaped locking pieces 28 along the axial direction of the screw insertion hole 25 around the inner peripheral edge of the screw insertion hole 25 of the electrical contact portion 22.
[0029]
The plurality of locking pieces 28 are formed by deep-drawing the center of the electrical contact portion 22 when punching the crimp terminal 21 ′ from a thin metal plate and punching out the bottom portion to provide a plurality of cutout grooves.
[0030]
The crimp terminal 21 ′ includes a bus bar 11 and a fastening bracket 15 ′, and a fusible link box 9 in which a connection terminal 10 a of the fusible link 10 is inserted between the bus bar 11 and the fastening bracket 15 ′ (see FIG. 10). The fastening bracket 15 ′ is formed by erecting a screw cylinder 15 b having a screw hole 15 c on the substrate portion 15 a, and a plurality of locking pieces around the screw hole 15 c are provided on the surface of the screw cylinder 15 b facing the connection terminal 10 a. A receiving groove 29 having a U-shaped cross section for bending and deforming 28 is provided.
[0031]
In the above configuration, the connection process of the crimp terminal 21 ′ will be described. As shown in FIG. 6A, the plurality of locking pieces 28 of the crimp terminal 21 ′ are connected to the bus bar 11 and the fusible as the mating connection terminal portions. The link 10 is set so that it can be inserted into the screw insertion holes 11a and 10b.
[0032]
Next, as shown in FIG. 6 (b), when the plurality of locking pieces 28 of the crimp terminal 21 'are inserted from the screw insertion hole 11a side, the locking pieces 28 are brought into contact with the receiving grooves 29 of the fastening fitting 15'. Touch. In this state, when the bolt 14 is inserted from the electric contact portion 22 side and tightened into the screw hole 15c, each locking piece 28 is received by the receiving groove 29 by the tightening force of the bolt 14, as shown in FIG. It is plastically deformed along the groove wall, and the tip of each locking piece 28 is locked so that the bus bar 11 and the connection terminal 10a are sandwiched toward the electrical contact portion 22. As a result, the crimp terminal 21 'is securely connected and fixed to the bus bar 11 and the connection terminal 10a.
[0033]
Therefore, even if the bolt 14 is loosened, the contact with the mating connection terminal portion is sufficiently made in the same manner as the crimp terminal 21 of the above-described embodiment, and the drawbacks due to the conventional crimp terminal connection fixing structure are eliminated. Can do.
[0034]
7 and 8 show still another embodiment of the crimp terminal connection and fixing structure of the present invention.
[0035]
In FIG. 7, the electrical contact portion 22 'of the crimp terminal 21 "is formed in a tapered ring body 30. That is, it is formed by forming a tapered peripheral wall having two large and small openings 30a and 30b. The large opening 30a is provided with slit-shaped cutout grooves 30c at equal intervals to form a plurality of contact pieces 31. At the tip of one contact piece 31a of each contact piece 31, the neck portion 24 is formed. Are coupled.
[0036]
The bus bar 11 is provided with a cylindrical cylinder 32 into which the ring body 30 is fitted at the periphery of each screw insertion hole 11a. The inner diameter of the cylindrical body 32 is formed to be slightly larger than the maximum outer diameter of the ring body 30, that is, the outer diameter in the vicinity of the large opening 30a.
[0037]
As the bolt 33, a bolt 33 provided with a flange 33c between the head 33a and the trunk shaft portion 33b is used. The diameter of the flange portion 33c is smaller than the diameter of the large opening 30a of the ring body 30 and larger than the diameter of the small opening 30b.
[0038]
In the above configuration, the connection process of the crimp terminal 21 ″ will be described. As shown in FIG. 8A, the ring body 30 of the crimp terminal 21 ″ can be fitted into the cylindrical body 32 of the bus bar 11 serving as the other connection terminal portion. Set as follows.
[0039]
Next, when the ring body 30 is inserted into the cylindrical body 32 and the bolt 33 is inserted from the large opening 30a side and tightened to the screw cylinder 15b, the flange 33c becomes the inner wall of the ring body 30, that is, a plurality of contacts. Each of the contact pieces 31 is expanded by the flange portion 33c, and the ring body 30 is firmly fitted to the inner wall of the cylindrical body 32 (FIGS. 8B and 8C). On the other hand, the small opening 30 b of the ring body 30 engages with the connection terminal 10 a of the fusible link 10.
[0040]
Therefore, even if the bolt 33 is loosened, the tip of each contact piece 31 is expanded and engaged with the inner wall of the cylindrical body 32, so that sufficient contact is ensured, and there is a drawback due to the conventional crimp terminal connection structure. Can be removed.
[0041]
【The invention's effect】
As described above, the present invention of claim 1 is provided with a crimping terminal in which an electrical contact portion having a screw insertion hole and a wire connection portion for crimping and connecting an electric wire are integrally formed via a neck portion, and a screw insertion hole. In the connection fixing structure of the crimp terminal for screwing and fixing the connection terminal plate portion on the other side, the electric contact portion is provided with a curved connection piece having a crescent-shaped flexible elasticity, and the screw of the connection terminal plate portion A bulge-shaped curved wall is formed on the periphery of the insertion hole, and the crimp terminal is fixed by screwing in a state where the curved connection piece is fitted to the curved wall. It is possible to make contact with the terminal plate portion in good condition.
[0042]
In the present invention of claim 2, since the curved connecting piece is provided on the periphery of the electrical contact portion on opposite sides along the axial direction of the terminal, it has a simple structure and good workability. Contact can also be obtained.
[0043]
According to the third aspect of the present invention, a plurality of the curved connecting pieces are integrally provided from the peripheral edge of the electrical contact portion in the form of a chrysanthemum, so that the load for bending each curved connecting piece can be reduced. The workability can be improved.
[0044]
According to the fourth aspect of the present invention, since the curvature radius of the curved wall is formed slightly smaller than the curvature radius of the curved connection piece, contact stability after inserting each curved connection piece is ensured. be able to.
[0045]
According to a fifth aspect of the present invention, the connection terminal plate portion is a bus bar, and the fusible link connection terminal is provided in the fusible link box and has a screw insertion hole inserted into the fusible link box. Since it is fixed by screwing, the connection of the crimp terminal in the fusible link box always comes into contact with the bus bar or the like in a good state.
[0046]
According to a sixth aspect of the present invention, there is provided a crimp terminal in which an electrical contact portion having a screw insertion hole and a wire connection portion for crimping and connecting an electric wire are integrally formed via a neck, and one or more counterparts provided with a screw insertion hole. In the connection fixing structure of the crimp terminal for fastening and fixing the connection terminal portion on the side with bolts and nuts, the electrical contact portion has a strip-shaped latch on the periphery of the screw insertion hole along the axial direction of the screw insertion hole A plurality of pieces are provided, and a receiving groove having a U-shaped cross section is formed around the screw hole of the nut on the surface facing the connection terminal portion of the nut, and the crimp terminal is connected to the screw insertion hole on the mating side. Inserting the locking piece, plastically deforming the locking piece along the groove wall of the receiving groove, and screwing and fixing with the end of the locking piece engaged with the connection terminal portion Therefore, the crimp terminal should always be in good contact with the mating connection terminal. It can be.
[0047]
According to a seventh aspect of the present invention, the connection terminal portion is a connection terminal of a bus bar and a fusible link, and the bus bar is provided in the fusible link box together with the nut, and the connection terminal is formed by inserting the fusible link. Since it is inserted between the bus bar and the nut, the electrical contact portion is screwed and fixed in a state where the bus bar and the connection terminal are overlapped, and the locking piece is engaged with the connection terminal. The connection of the crimp terminal in the fusible link box always comes into contact with the bus bar or the like in a good state.
[0048]
The present invention of claim 8 is a crimp terminal in which an electrical contact portion having a screw insertion hole and a wire connection portion for crimping and connecting an electric wire are integrally formed via a neck portion, and one or more counterparts provided with a screw insertion hole. In the crimp terminal connection and fixing structure in which the connection terminal portion on the side is fixed with bolts and nuts, the electrical contact portion is formed in a tapered ring body, and a plurality of slit-like shapes are formed in a large opening of the ring body. A strip-shaped contact piece is formed by providing a notch groove, and the neck is coupled to the tip of one of the plurality of contact pieces, and the connection terminal portion has a peripheral edge of the screw insertion hole. A cylindrical tubular body is provided, and a flange portion is formed between the head portion and the trunk shaft portion to engage with the inner wall of the ring body, and the crimp terminal is inserted into the tubular body. Then, tighten the screws with the flanges of the bolts expanding the contact pieces. Since it is intended to be fixed, it is possible to crimp terminals are always in contact in good condition and the counterpart connection portion.
[0049]
According to the ninth aspect of the present invention, the outer diameter of the ring body on the side of the large opening is formed to be slightly smaller than the inner diameter of the cylindrical body. It can be easily expanded toward the inner wall of the body to obtain sufficient contact.
[0050]
According to a tenth aspect of the present invention, the connection terminal portion is a connection terminal of a bus bar and a fusible link, and is provided in a fusible link box. The bus bar is formed with the cylindrical body, and an opening portion of the cylindrical body Since the vicinity of the small opening of the ring body is engaged with the connection terminal facing from the side, the connection of the crimp terminal in the fusible link box always comes into contact with the bus bar or the like in a good state.
[Brief description of the drawings]
FIG. 1 is a perspective view showing an embodiment of a crimp terminal connection fixing structure according to the present invention.
2 is a rear view showing an arrangement state of curved connection pieces of the crimp terminal of FIG. 1; FIG.
3A is a cross-sectional view showing a state before screw tightening and fixing in FIG. 1; FIG.
(B) It is sectional drawing which shows the state currently fixed by screw fastening of FIG.
4 is a rear view showing another embodiment with respect to FIG. 2; FIG.
FIG. 5 is a perspective view showing another embodiment of the crimp terminal connection fixing structure according to the present invention.
6A is a cross-sectional view showing a state before screw tightening and fixing in FIG. 5;
(B) It is sectional drawing which shows the state just before the screw fastening of FIG.
(C) It is sectional drawing which shows the state currently fixed by screw fastening of FIG.
FIG. 7 is a perspective view showing still another embodiment of a crimp terminal connection fixing structure according to the present invention.
8A is a cross-sectional view showing a state before the screw fastening shown in FIG.
(B) It is sectional drawing which shows the state currently fixed by screw fastening of FIG.
(C) It is a perspective view of (b).
FIG. 9 is a perspective view showing a conventional crimp terminal.
FIG. 10 is a perspective view showing a conventional crimp terminal connection fixing structure.
[Explanation of symbols]
1, 2, 21 ', 21 "Crimp terminal 2,22 Electrical contact part 3,23 Wire connection part 4,24 Neck part 5,10b, 11a, 25 Screw insertion hole 9 Fusible link box 10 Fusible link 10a Connection terminal 11 Busbars 14 and 33 Bolts 15 and 15 'Fastening fitting 26 Curved connection piece 27 Curved wall 28 Locking piece 29 Receiving groove 30 Ring body 31 Contact piece 32 Cylindrical body 33c Gutter

Claims

Securely tighten and fix the crimping terminal in which the electrical contact part with the screw insertion hole and the wire connection part for crimping and connecting the electric wire are integrally formed via the neck and the connecting terminal plate part on the other side with the screw insertion hole In the connection and fixing structure of crimp terminals to
The electrical contact portion is provided with a curved connecting piece having a crescent-shaped flexible elasticity,
Form a bulge-shaped curved wall on the periphery of the screw insertion hole of the connection terminal plate part,
In the crimp terminal , the curved connecting piece penetrates into the curved wall, and the curved connecting piece generates a force pressing the inner surface of the curved wall, and the outer surface of the curved connecting piece and the inner surface of the curved wall The connection fixing structure of the crimp terminal, characterized in that it is fixed by screwing in a state where the two are closely overlapped .

2. The crimp terminal connection fixing structure according to claim 1, wherein the curved connection pieces are provided on opposite sides of the electric contact portion on both sides along the axial direction of the terminal.

The crimp terminal connecting and fixing structure according to claim 1, wherein a plurality of the curved connecting pieces are provided integrally in the form of a chrysanthemum from the periphery of the electrical contact portion.

4. The connection fixing structure for a crimp terminal according to claim 1, wherein a curvature radius of the curved wall is formed to be slightly smaller than a curvature radius of the curved connection piece.

The connection terminal plate portion is a bus bar and is provided in a fusible link box, and the fusible link connection terminals having screw insertion holes inserted into the fusible link box are screwed and fixed together. The connection fixing structure of the crimp terminal according to claim 1 to 4.

A crimping terminal in which an electrical contact part having a screw insertion hole and a wire connection part for crimping and connecting an electric wire are integrally formed via a neck part, and one or more mating connection terminal parts provided with a screw insertion hole are bolts And in the connection and fixing structure of the crimp terminal that is fastened and fixed with a nut,
The electrical contact portion is provided with a plurality of strip-shaped locking pieces along the axial direction of the screw insertion hole at the periphery of the screw insertion hole,
A receiving groove having a U-shaped cross section is formed around the screw hole of the nut on the surface facing the connection terminal portion of the nut,
The crimp terminal inserts the locking piece into the screw insertion hole on the mating side , plastically deforms the locking piece in a direction extending outward along the groove wall of the receiving groove, and the locking piece is received by the receiving terminal. A crimp terminal connection fixing structure characterized by being tightly overlapped with a groove wall of a groove and screwed in a state where the connection terminal part is sandwiched between an end of the locking piece and the electrical contact part .

The connection terminal portion is a connection terminal of a bus bar and a fusible link, and the bus bar is provided in the fusible link box together with the nut, and the connection terminal is interposed between the bus bar and the nut by insertion of the fusible link. The crimp terminal according to claim 6, wherein the crimping terminal is inserted and the electric contact portion is screwed and fixed in a state where the bus bar and the connection terminal are overlapped, and the locking piece is engaged with the connection terminal. Connection fixing structure.

A crimping terminal in which an electrical contact part having a screw insertion hole and a wire connection part for crimping and connecting an electric wire are integrally formed via a neck part, and one or more mating connection terminal parts provided with a screw insertion hole are bolts And in the connection and fixing structure of the crimp terminal that is fastened and fixed with a nut,
The electrical contact portion is formed in a tapered ring body, and a plurality of slit-shaped notch grooves are provided in a large opening of the ring body to form a strip-shaped contact piece, The neck is coupled to the tip of one contact piece,
The connecting terminal portion is provided with a cylindrical tube at the periphery of the screw insertion hole,
The bolt is formed with a flange that engages the inner wall of the ring body between the head and the trunk shaft,
The crimp terminal is screwed and fixed in a state in which the ring body is inserted into the cylindrical body, and the flange portion of the bolt expands the tips of the contact pieces and engages with the inner wall of the cylindrical body. A structure for fixing and connecting crimp terminals characterized by the above.

9. The crimp terminal connection fixing structure according to claim 8, wherein an outer diameter of the ring body on a large opening side is formed to be slightly smaller than an inner diameter of the cylindrical body.

The connection terminal portion is a connection terminal between a bus bar and a fusible link, and is provided in a fusible link box. The bus bar is formed with the cylindrical body, and the ring is connected to the connection terminal facing the opening of the cylindrical body. The connection fixing structure of the crimp terminal according to claim 8 or 9, wherein the vicinity of a small opening of the body is engaged.