Crimp terminal and terminal crimping device

Patent metadata

Field	Value
Publication number	US-9774100-B2
Application number	US-201615376955-A
Country	US
Kind code	B2
Filing date	Dec 13, 2016
Priority date	Dec 16, 2015
Publication date	Sep 26, 2017
Grant date	Sep 26, 2017

Abstract

A terminal fitting includes a terminal connecting portion and an electric wire connecting portion. A water stop member is affixed to an inner wall surface of the electric wire connecting portion before crimping process and suppresses entering of water between the electric wire connecting portion and a core wire of the electric wire after the crimping. The electric wire connecting portion is formed into a U-shape by raising the first barrel piece and the second barrel piece from both ends of the bottom. The distal end of the first barrel piece is bent toward the second barrel piece, to form a gap between a slide contact surface on a descending second die and the distal end of the first barrel piece.

First claim

What is claimed is:

1. A crimp terminal comprising:
a terminal fitting that includes
a terminal connecting portion electrically connected to a counterpart terminal,
an electric wire connecting portion electrically connected to an end of an electric wire placed on an inner wall surface side of the electric wire connecting portion by crimping process performed with the electric wire connecting portion sandwiched between a first die and a second die, and
a coupling portion that couples the terminal connecting portion and the electric wire connecting portion,

the electric wire connecting portion being divided into a bottom on which the end of the electric wire is placed during the crimping process, a first barrel piece extending from one end of the bottom, wound around the end of the electric wire, and positioned on an inner side, and a second barrel piece extending longer than the first barrel piece from the other end of the bottom, wound around the end of the electric wire and the first barrel piece, and positioned on an outer side; and
a water stop member that is affixed to the inner wall surface of the electric wire connecting portion before the crimping process is performed and that is configured to suppress entering of water between the electric wire connecting portion and a core wire at a distal end of the electric wire after the crimping process is completed, wherein
the electric wire connecting portion is formed into a U-shape by raising the first barrel piece and the second barrel piece from both ends of the bottom before the crimping process is performed, and
a distal end of the first barrel piece in an extending direction in the electric wire connecting portion having a U-shape is bent along a bend line toward the second barrel piece, to form a gap between the distal end of the first barrel piece and a slide contact surface of the second die that contacts with the first barrel piece.

2. The crimp terminal according to claim 1 , wherein
the distal end of the first barrel piece is bent such that the gap is larger than at least the thickness of a distal end of the second barrel piece in an extending direction.

3. The crimp terminal according to claim 1 , wherein
when the water stop member is affixed to a distal end of the second barrel piece, the distal end of the first barrel piece is bent such that the gap is larger than at least the sum of the thickness of the distal end of the second barrel piece and the thickness of the water stop member.

4. The crimp terminal according to claim 1 , wherein
the inner wall surface of the second barrel piece has a first groove formed at a part overlapping with an outer wall surface of the first barrel piece after the crimping process is completed and is configured to be filled with part of the affixed water stop member, and
the water stop member in the first groove forms into a water stop area that suppresses entering of water between the electric wire connecting portion and the core wire at the distal end of the electric wire after the crimping process is completed.

5. The crimp terminal according to claim 2 , wherein
the inner wall surface of the second barrel piece has a first groove formed at a part overlapping with an outer wall surface of the first barrel piece after the crimping process is completed and is configured to be filled with part of the affixed water stop member, and
the water stop member in the first groove forms into a water stop area that suppresses entering of water between the electric wire connecting portion and the core wire at the distal end of the electric wire after the crimping process is completed.

6. The crimp terminal according to claim 3 , wherein
the inner wall surface of the second barrel piece has a first groove formed at a part overlapping with an outer wall surface of the first barrel piece after the crimping process is completed and is configured to be filled with part of the affixed water stop member, and
the water stop member in the first groove forms into a water stop area that suppresses entering of water between the electric wire connecting portion and the core wire at the distal end of the electric wire after the crimping process is completed.

7. The crimp terminal according to claim 1 , wherein
the water stop member is affixed to an affixing area on the inner wall surface of the second barrel piece, the affixing area being determined such that the water stop member on the inner wall surface of the second barrel piece is capable of covering the outer wall surface of the distal end of the first barrel piece after the crimping process is completed.

8. The crimp terminal according to claim 2 , wherein
the water stop member is affixed to an affixing area on the inner wall surface of the second barrel piece, the affixing area being determined such that the water stop member on the inner wall surface of the second barrel piece is capable of covering the outer wall surface of the distal end of the first barrel piece after the crimping process is completed.

9. The crimp terminal according to claim 3 , wherein
the water stop member is affixed to an affixing area on the inner wall surface of the second barrel piece, the affixing area being determined such that the water stop member on the inner wall surface of the second barrel piece is capable of covering the outer wall surface of the distal end of the first barrel piece after the crimping process is completed.

10. The crimp terminal according to claim 4 , wherein
the water stop member is affixed to an affixing area on the inner wall surface of the second barrel piece, the affixing area being determined such that the water stop member on the inner wall surface of the second barrel piece is capable of covering the outer wall surface of the distal end of the first barrel piece after the crimping process is completed.

11. A terminal crimping device comprising:
a terminal supplying device configured to transfer a crimp terminal to a crimping position at which the crimp terminal is crimped to an electric wire;
a crimping device configured to crimp the crimp terminal transferred to the crimping position to an end of the electric wire using a first die and a second die; and
a driving device configured to reduce a gap between the first die and the second die during crimping process and increases the gap between the first die and the second die after the crimping process is completed, wherein
the crimp terminal comprises
a terminal fitting that includes
a terminal connecting portion electrically connected to a counterpart terminal,
an electric wire connecting portion electrically connected to the end of the electric wire placed on an inner wall surface side of the electric wire connecting portion by the crimping process, and
a coupling portion that couples the terminal connecting portion and the electric wire connecting portion,
the electric wire connecting portion being divided into a bottom on which the end of the electric wire is placed during the crimping process, a first barrel piece extending from one end of the bottom, wound around the end of the electric wire, and positioned on an inner side, and a second barrel piece extending longer than the first barrel piece from the other end of the bottom, wound around the end of the electric wire and the first barrel piece, and positioned on an outer side, and

a water stop member that is affixed to the inner wall surface of the electric wire connecting portion before the crimping process is performed and configured to suppress entering of water between the electric wire connecting portion and a core wire at a distal end of the electric wire after the crimping process is completed,
the first di

Assignees

• Yazaki Corp
• Toyota Motor Co Ltd

Inventors

• Shinohara Junya
• Iwata Masashi
• Ohtaka Kazuto
• Kobayashi Hiroshi
• Taga Hiroyasu
• Hara Motoya
• Nakata Hirohito
• Takahashi Kazuhide
• Yoshida Takato

Classifications

• H01R43/055

  with contact member feeding mechanism · CPC title

• H01R4/185 Primary

  combined with a U-shaped insulation-receiving portion · CPC title

• H01R13/52

  Dustproof, splashproof, drip-proof, waterproof, or flameproof cases · CPC title

• H01R4/188

  having an uneven wire-receiving surface to improve the contact · CPC title

• H01R43/05

  with wire-insulation stripping · CPC title