JPS6236212Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a crimping structure for crimping and connecting an electric wire end to a terminal.

Generally, when connecting a single wire electric wire to a terminal by crimping, a crimp piece 3 formed on the terminal 2 is attached as shown in Fig. 1.
The end of the electric wire 1 is inserted into A (crimping piece for crimping the coated portion) 3B (crimping piece for crimping the bare wire portion) and crimping and connecting. However, if it is installed in a car or the like and used in environments and conditions such as strong vibrations, connection with parts that generate heat, or overcurrent, the crimp piece 3A
The nearby portion a shown in the drawing may break due to vibration, and the wire may break at the portion b shown in the drawing of the crimp piece 3B and the portion c shown near the terminal 2 due to heat deterioration of the electric wire.

The object of the present invention is to provide a crimping structure for the ends of electric wires that effectively prevents wire breakage due to vibration and heat deterioration as described above.

That is, the present invention proposes ``In crimping the end of a wire having a current-carrying function to a terminal, along the wire,
It is characterized by a structure in which dummy wires of 100 mm or more with thermal conductivity are placed side by side and crimped.

Embodiments will be described in detail below with reference to drawings. First, in FIGS. 2 and 3 showing one embodiment, a crimping piece 3A3B formed on a terminal 2 is lined up with an electric wire 1 and a dummy wire 4 having a heat conduction function and having a length L of 100 mm or more. and dummy wire 4
As shown in Fig. 3, the electric wire 1 is cut to the required length L, the coating on the end is peeled off, and the bare wire portion is crimped with piece 3B, and the covered portion is crimped with piece 3A, in the same way as the electric wire 1 that carries electricity. It was inserted together with electric wire 1 and crimped in parallel.
The rear part below the crimping part of dummy wire 4 is
It is attached so that it touches the outer periphery of. The above-mentioned dummy wire 4 is intended to improve the vibration resistance of the crimped portion and to provide a cooling effect through heat transfer and radiation, and there are various examples of specific means thereof. For example, as shown in FIG. 4, the coating near the end of the wire 1 is partially peeled off, the bare wire portion is bent 180 degrees, the short wire portion is used as the dummy wire 4, and the crimp piece 3A3 is used.
The dummy wires 4 may be inserted and crimped into the dummy wires B. Also, based on the technical intention described above, the dummy wires 4 can be made of a material with excellent heat transfer coefficient and physical strength. A fan-shaped protrusion may be attached to the electric wire 1 and the dummy wire 4 to promote the movement.

When using the above terminal structure of the present invention, the crimp piece 3
The electric wire 1 and the dummy wire 4 come into contact with each other in the vicinity of A (portion a in the first diagram), and the dummy wire 4
acts as an additional mass, so the vibration phenomenon of the electric wire 1 is physically attenuated in this part.

In addition, since the dummy wire 4, which has a length of 100 mm or more and has a large heat capacity, is attached so as to be in contact with the end of the wire 1 including the crimped part, it is possible to generate heat due to overcurrent and generate heat. A considerable amount of the heat transferred from the component to the terminal 2 is transferred from the crimped part or the outer periphery to the dummy wire 4 and absorbed, and the generated heat transferred to the dummy wire 4 and transferred to the dummy wire 4 is sequentially transferred to the rear of the dummy wire 4. Since the wire is radiated to the outside air, the temperature of the wire 1 including the crimped portion is actively prevented from rising.

In addition, the length of the dummy wire can be adjusted within a range of 100 mm or more according to the amount of heat generated by the crimping part, and the type and shape of the dummy wire can be selected according to the amount of heat generated by the crimped part. effective. That is, FIGS. 5 and 6 show the heat dissipation effect of ^the present invention according to the embodiment shown in FIG. 1. As shown in FIG. The correlation between the length L ₁ of the dummy wire 4 and the heat dissipation effect of the wire 1 was actually measured under the test conditions of 60 amperes, 45 minutes of electricity, and an ambient temperature of 50°C. The solid line indicates the terminal temperature on the back surface 5 of the crimp piece 3A, and the dotted line indicates the bare wire 6 at a distance L ₂ = 100 mm from the tip of the wire 1.
temperature. In the figure, as the length of the dummy wire 4 increases to about 100 mm, the temperature of the terminal 2 drops rapidly, and the heat dissipation effect of the dummy wire 4 is clear, compared to the conventional structure without the dummy wire 4. A heat dissipation effect of approximately 20°C is observed. Furthermore, it is clear that the internal temperature of the electric wire 1 located 100 mm away from the terminal 2 also enjoys a heat dissipation effect similar to that of the terminal 2.

In this way, the crimping structure of the present invention is designed to prevent the crimping part and the wire from being connected due to overcurrent and heat transferred from other parts.
This has the effect of effectively suppressing the temperature rise of the electric wire 1 and attenuating the vibration of the electric wire 1. Therefore, there is no need to use an unnecessarily thick electric wire as in the past, and the function of the electric wire can be stabilized by preventing disconnection of the electric wire due to vibration during use and disconnection due to heat deterioration of the electric wire. In addition, the present invention has a double-wire crimping configuration using the electric wire 1 and the dummy wire 4, and the covered portion is crimped in an annular shape by a pair of left and right crimping pieces 3A each opening upward, so that it is different from the conventional structure shown in FIG. This has the additional effect of eliminating the conventional defect in which the left and right pieces of the crimp piece 3B bite into the intermediate portion of the coating and damage the coating.

[Brief explanation of the drawing]

Figure 1: Perspective view showing conventional crimping structure, Figure 2
Figure: A perspective view of an embodiment of the present invention, Figures 3 and 4: A perspective view showing the crimping method of an embodiment of the present invention, Figures 5 and 6:
Experimental state diagram showing an experiment on the heat dissipation effect of the present invention (5th
Figure) and actual measurement diagram (Figure 6). Main symbols: 1: electric wire, 2: terminal, 3A3B: crimp piece, 4: dummy wire.

Claims (1)

[Scope of utility model registration request] A crimping structure for an electric wire end, in which an electric wire end having a current carrying function is crimped to a terminal, characterized in that a dummy wire having a thermal conduction function of 100 mm or more is juxtaposed and crimped along the electric wire end.