JPS6331431Y2 - - Google Patents

Description

[Detailed explanation of the idea] The present invention relates to a cable connection mechanism.

In general, a connecting cable drawn out from the main body of an electrical device is connected to a flange 2a by fitting a rubber bushing 2 into a hole 1a drilled in the main body 1, as shown in Fig. 1.
At the same time, the connecting cable 3 is inserted into the rubber bush 2 and connected to a connecting terminal (not shown) inside the main body.

However, since the cable 3 simply passes through the rubber bushing 2 in such a connecting mechanism, the cable is easily broken when it is pulled, and the rubber bushing 2 is also easily dislodged. Moreover,
The water resistance and insulation between the main body 1 and the rubber bushing 2, and between the rubber bushing 2 and the cable 3 are insufficient, so it cannot be used in humid places or in work sites with poor environmental conditions where water, oil, etc. are used. This is extremely dangerous as there is a risk of short circuit or electric leakage.

The present invention has been made in view of the above points, and includes fixing a bushing to the main body side via a connecting metal fitting, and closely fixing the bushing, the connecting metal fitting, and a cable, etc. that passes through the bushing, through insulating members. This provides a connection mechanism for cables.

Hereinafter, the present invention will be described in detail based on one embodiment of the accompanying drawings.

In FIG. 2, the connecting fitting 11 has a substantially cylindrical shape, and has an annular groove 11a and a threaded portion 11b on the outer periphery.
is formed, and approximately half including the groove 11a is inserted into the hole 10a of the main body 10, and the synthetic resin member 12 is inserted into the hole 10a of the main body 10.
It is fixed with a mold. At this time, by pouring a molding material into the groove 11a, the connecting fitting 11 is completely tightly fixed to the main body 10 and is prevented from coming off from the main body 10. The threaded portion 11 of the connection fitting 11 is attached to one open end of the connection fitting 13.
A screw hole 13a that is screwed into the screw hole 13a has a predetermined diameter hole 13 smaller in diameter than the screw hole 13a at the other open end.
b are formed concentrically and in communication with each other,
A stepped portion 13c is provided between these screw holes 13a and holes 13b. These connection fittings 1
1 and 13 are made of rust-free metal such as brass.

A flange 14a that fits into a screw hole 13a of the connecting fitting 13 is formed at one end of the bushing, for example, a rubber bush 14, and a hole 14c is formed at the axis of the cylindrical body portion 14b. This cylindrical body part 14
The outer diameter of b is large enough to fit tightly into the hole 13b of the connecting fitting 13. The flange 14a and the cylindrical portion 14b of the rubber bush 14 are fitted into the screw hole 13a and the hole 13b of the connection fitting 13, respectively, and in the illustrated state in which the connection fitting 13 is screwed into the connection fitting 11, the flange 14a is The end face 11c of the metal fitting 11 and the stepped portion 13c of the metal fitting 13 are crimped and fixed. In addition, the flange 14
A waterproof O-ring 15 is disposed between the step portion 13c of the connecting fitting 13 and the connecting fitting 13.

The connection cable 16 is connected to the hole 14 of the rubber bush 14.
c, and the tip 16a is inserted into the hole of the connecting fitting 11. cable 1
A locking ring 17 formed of a synthetic resin member is fitted and fixed to the tip end 16a of 6. The outer peripheral surface of this ring 17 is connected to the inner peripheral surface of the connecting fitting 11,
One side end surface is in close contact with the flange 14a of the rubber bush 14, respectively. Each connection line 1 of cable 16
The tips of 6b and 16c are connected to the respective connection terminals 18a and 18b of the connector 18 disposed in the connection fitting 11, and these respective connection terminals 18a and 18
b are connected to an electric circuit (not shown) inside the main body 10, respectively. Then, the ring 17 and the connector 18
Insulating filler such as silicone rubber 1 is placed in the space between the
9 is filled.

Therefore, even if the connection cable 16 is pulled by some force, it will not break at the connection to the connector 18, or the rubber bush 14 will not come off from the main body.

As explained above, according to the present invention, even if strong tension is applied to the cable, the cable will not break at the connection part with the main body, or the rubber bushing will not come off, and it is water resistant and oil resistant. It has advantages such as excellent performance and easy maintenance.

[Brief explanation of the drawing]

Figure 1 is an explanatory diagram of the conventional cable connection mechanism.
FIG. 2 is an explanatory cross-sectional view of essential parts showing an embodiment of the cable connection mechanism according to the present invention. 10...Main body, 11, 13...Connection fittings, 14
...Rubber butt, 15...O ring, 16...
Connection cable, 17... O-ring, 18... Connector, 19... Filler.

Claims (1)

[Scope of utility model registration request] In a cable connection mechanism that connects and fixes a cable to the main body of an electrical device via a bushing,
The bushing is closely fixed by a first connecting fitting fixed to the main body side and a second connecting fitting screwed into the connecting fitting, and a locking member is fixed to the end of the cable that is inserted into the bushing. A cable connection characterized in that an end of the cable is closely fixed to the first connection fitting, and an insulating member is filled between the cable connection connector and the cable connection connector arranged in the first connection fitting. mechanism.