JPS6330125Y2 - - Google Patents

Description

[Detailed description of the invention] This invention consists of an aluminum wire (here, the aluminum wire refers to an electric wire made of aluminum or its alloy) and a terminal (here, the terminal is made of phosphor bronze, brass, stainless steel, nickel silver, etc.). This refers to the connection structure with terminals (terminals made of materials).

Today, people are trying to use aluminum wire in wiring harnesses to reduce the weight of vehicles, but aluminum wire has a specific gravity that is 1/3 that of copper wire used in conventional wiring harnesses.
Although it is light and lightweight, it may form an oxide film on its surface or cause electrical corrosion due to the presence of electrolyte such as salt water when connecting to terminals, or loosening of connections due to differences in thermal expansion coefficients. This has the drawback of causing poor contact at the relevant part.

In view of the above-mentioned drawbacks, the present application proposes a method in which continuous sharp protrusions formed on the upper edge of the wire barrel of the terminal are wedged onto the aluminum wire in order to break the oxide film and make electrical contact, and also to prevent the intrusion of electrolyte such as salt water. The protrusions on the opposing side walls of the wire barrel are shifted from each other in order to closely engage with each other, and the protrusions on the opposing side walls are shifted to avoid a reduction in the contact surface caused by loosening of the connecting portion due to the difference in thermal expansion. It is an attempt to solve the above-mentioned drawbacks by intersecting and wedge-bonding the aluminum wire.

An example of the implementation of the present invention will be described below with reference to the drawings. 1 is formed by an electrical connection part 2, an insulation barrel 3 with a substantially U-shaped cross section, and a wire barrel 4, which are connected to the electrical contact part 2. The terminal 1 is connected to both side walls 5 and 6 of the wire barrel 4.
Sharp protrusions 7, 7', 7''...8, continuous at the tip
8', 8''... are arranged in succession to make the part serrated.

The sharp protrusions 7, 7', 7'' on the side wall 5 are the protrusions 8, 8', 8'' on the side wall 6 facing the side wall 5.
The protrusions 7, 7', 7''...8, 8', 8''... each form a slope 9 on the outer side of the tip to gradually narrow the tip. There is.

Reference numeral 10 denotes an electric wire formed by covering an aluminum wire 11 with a coating 12, and the end of the electric wire 10 is exposed to expose the aluminum wire 11 at that portion.

The terminal 1 and the electric wire 10 are connected by crimping the aluminum wire 11 and the coating 12 exposed at the end of the electric wire 10 to the wire barrel 4 and insulation barrel 3 of the terminal 1, respectively. Pointed protrusions 7, 7', 7''..., 8, 8', 8''... on the upper edges of both side walls 5, 6 of the barrel 4, which face each other at different positions, are tightly meshed with each other, and the wire The barrel 4 functions as an integrated substantially cylindrical shape to seal the aluminum wire 11, and its tip is bitten into the aluminum wire 11 so as to cross each other and wedge it.

Therefore, the oxide film generated on the surface of the aluminum wire 11 forms the protrusions 7, 7', 7''..., 8, 8', 8''...
It was broken by biting into the aluminum wire 11,
Electrical contact between the aluminum wire 11 and the terminal 1 is reliably made, and the contact surface is increased by making the upper edges of the side walls 5, 6 serrated.

In addition, sharp protrusions 7, 7', 7''..., which face each other with their positions shifted relative to an electrolytic solution such as salt water, etc.
8, 8', 8'', etc. are closely meshed with each other and are pressed together or crimped, so that it is possible to prevent the electrolyte from entering from these parts, and electrical corrosion does not occur.

On the other hand, in order to prevent loosening of the connection caused by the difference in thermal expansion between the terminal 1 and the aluminum wire 11, the sharp protrusions 7, 7',
7''..., 8, 8', 8''... intersect with each other within the aluminum wire 11, and the above protrusions 7, 7', 7''
..., 8, 8', 8''... are supported by the spring properties of the curved side walls 5, 6, so that the projections 7, 7',
7''..., 8, 8', 8''... are in contact with the aluminum wire 11 while always holding the inside of the aluminum wire 11.

The present application solves the above-mentioned drawbacks in the connection between the aluminum wire 11 and the terminal 1 through the above-mentioned effects, makes the above connection possible, allows the use of aluminum wire in the wire harness, and ultimately improves the performance of the vehicle. This has great effects, such as making it possible to reduce the weight of equipment such as.

[Brief explanation of the drawing]

The figure shows an example of the implementation of the present invention.
The figure is a cross-sectional view showing a connection structure between an aluminum wire and a terminal according to the present invention, FIG. 2 is a perspective view showing a state before connection between an electric wire coated with an aluminum wire and a terminal, and FIG. 3 is a wire of the terminal. cross-section of the barrel,
FIG. 4 is a plan view showing a state in which the aluminum wire and the terminal are connected. 1...Terminal, 4...Wire barrel, 5, 6...
...Side wall, 7, 7', 7''..., 8, 8', 8''...Protrusion, 11...Aluminum wire.

Claims (1)

[Scope of utility model registration request] A plurality of continuous sharp protrusions in a sawtooth shape are formed on the upper ends of both side walls of the wire barrel portion having a substantially U-shaped cross section, and the positions of the protrusions are shifted between the side walls. By tightly interlocking the protrusions,
An aluminum product characterized in that the wire barrel part functions as an integrated substantially cylindrical body, and the wire barrel part is crimped and integrated with the aluminum wire with the tips of the protrusions biting into the aluminum wire. Connection structure between wire and terminal.