Pressure-welding structure, terminal-attached electric wire, and manufacturing method for terminal-attached electric wire

Patent metadata

Field	Value
Publication number	US-11735836-B2
Application number	US-202117489699-A
Country	US
Kind code	B2
Filing date	Sep 29, 2021
Priority date	Oct 7, 2020
Publication date	Aug 22, 2023
Grant date	Aug 22, 2023

Abstract

A core-wire exposed portion in an electric wire and at least one pair of pressure-welding pieces made of an electroconductive material are included. The core-wire exposed portion is a portion is which a core wire composed of a plurality of element wires is exposed. The pair of pressure-welding pieces are provided with a core wire pressure-welding section in which pressure-welding end surfaces are disposed facing each other at a distance and Kate the core-wire exposed portion press-fitted between the pressure-welding end surfaces. The core wire pressure-welding section is formed as a section that brings all of the element wires in the core-wire exposed portion, between the pressure-welding end surfaces, into contact with either of the pressure-welding end surfaces while being in an aligned state.

First claim

What is claimed is:

1. A pressure-welding structure comprising:
a core-wire exposed portion in an electric wire, the core-wire exposed portion being a portion in which a core wire composed of a plurality of element wires is exposed; and
at least one pair of pressure-welding pieces made of an electroconductive material, the at least one pair of pressure-welding pieces each including a core wire pressure-welding section in which pressure-welding end surfaces are disposed facing each other at a distance, the at least one pair of pressure-welding pieces each having the core-wire exposed portion press-fitted between the pressure-welding end surfaces, wherein
the core wire pressure-welding section is formed as a section that brings all of the element wires in the core-wire exposed portion, between the pressure-welding end surfaces, into contact with either of the pressure-welding end surfaces while being in an aligned state.

2. The pressure-welding structure according to claim 1 , wherein
each of the at least one pair of pressure-welding pieces includes an element wire aligning section in which aligning end surfaces are disposed at a distance that is larger than the distance at which the pressure-welding end surfaces are disposed, and
the core wire aligning section is formed as a section that enables all of the element wires in the core-wire exposed portion to, between the aligning end surfaces, be moved toward the core wire pressure-welding section while being kept aligned.

3. The pressure-welding structure according to claim 2 , wherein
the core wire aligning section is formed as a section that enables all of the element wires in the core-wire exposed portion to, between the pressure-welding end surfaces, be moved toward the core wire pressure-welding section while being kept in the same sequence as in the aligned state in the, core wire pressure-welding section.

4. The pressure-welding structure according to claim 2 , wherein
the pressure-welding end surfaces are formed at a distance that is larger than a diameter that each of the element wires in a circular columnar shape has before being press-fitted and that is smaller than twice the diameter, and
the aligning end surfaces are formed at a distance that is larger than twice the diameter and that is smaller than three times the diameter.

5. The pressure-welding structure according to claim 3 , wherein
the pressure-welding end surfaces are formed at a distance that is larger than a diameter that each of the element wires in a circular columnar shape has before being press-fitted and that is smaller than twice the diameter, and
the aligning end surfaces are formed at a distance that is larger than twice the diameter and that is smaller than three times the diameter.

6. A terminal-attached electric wire, comprising:
an electric wire including a core wire that is composed of element wires and a covering that covers the core wire except for a core-wire exposed portion in which the core wire is exposed; and
a terminal fitting including at least one pair of pressure-welding pieces, the at least one pair of pressure-welding pieces each including a core wire pressure-welding section in which pressure-welding end surfaces are disposed facing each other at a distance, the terminal fitting having the core-wire exposed portion press-fitted between the pressure-welding end surfaces in each of the at least one pair of pressure-welding pieces, wherein
the core wire pressure-welding section is formed as a section that brings all of the element wires in the core wire exposed portion, between the pressure-welding end surfaces, into contact with either of the pressure-welding end surfaces while being in an aligned state.

7. A terminal-attached electric wire manufacturing method comprising:
attaching a core-wire exposed portion in an electric wire to a terminal fitting, the core-wire exposed portion being a portion in which a core wire composed of a plurality of element wires is exposed, the terminal fitting including at least one pair of pressure-welding pieces, the at least one pair of pressure-welding pieces each including a core wire pressure-welding section in which pressure-welding end surfaces are disposed facing each other at a distance, the at least one pair of pressure-welding pieces each including a core wire aligning section in which aligning end surfaces are disposed facing each other at a distance that is larger than the distance at which the pressure-welding end surfaces are disposed, wherein
the attaching a core-wire exposed portion comprises:
inserting, while aligning all of the element wires in the core-wire exposed portion between the aligning end surfaces, and then, between the aligning end surfaces, moving all of the element wires is the core-wire exposed portion toward the core wire pressure-welding section while being kept in an aligned state entered by the element wires at the insertion, and
press-fitting, between the pressure-welding end surfaces, the core-wire exposed portion that has passed through the core wire aligning section, and bringing all of the element wires in the core-wire exposed portion, between the pressure-welding end surfaces, into contact with either of the pressure-welding end surfaces while being in an aligned state.

Assignees

• Yazaki Corp

Inventors

• Ito Naoki

Classifications

• H01R4/2466 Primary

  the contact members having a channel-shaped part, the opposite sidewalls of which comprise insulation-cutting means · CPC title

• B23K20/02 Primary

  by means of a press {; Diffusion bonding} · CPC title

• B23K2101/32

  Wires · CPC title

• B23K2101/38

  Conductors · CPC title

• H01R4/2425

  Flat plates, e.g. multi-layered flat plates · CPC title