JPH06208860A - Lead-through structure of lead wire from inside of liquid container - Google Patents

Abstract

PURPOSE:To prevent the position dislocation of a pressure-connection metal fitting and the leak of filling material by housing the pressure connection metal fitting inside of a spacer, which is fastened by pressing-in into a housing recessed part of a lead wire holding member, and inserting the lead wire into an insertion hole of the spacer. CONSTITUTION:A pressure-connection metal fitting 13 is positioned in a housing chamber 32 of a spacer 30 and lead wires 9 in front and rear thereof are positioned at insertion hole parts 34, 36. The spacer 30 is closed, and under this condition, the lead wire 9 is inserted to an insertion hole 7 of a lead wire holding member 20, and at a stage when the taper surface of the spacer 30 abuts on the taper surface inside of a housing recessed part 25, the spacer 30 is further pressed in. A clearance between the fitting 13 and the lead wire 9 is reduced and the fitting 13 is held so as to prevent a fall-out thereof by fastening the insertion hole parts 34, 36 inward with the work of both the taper surfaces. When the filling material 17 is filled inside of the recessed part 25, the filling material 17 enters the housing chamber from the insertion hole 36 and intrudes into the fitting 13 and an insulating coating peeled part 11.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a lead wire lead-out structure for leading out wire harnesses for solenoid operation and lead wires of various sensors from a liquid container such as a vehicle transmission case.

[0002]

2. Description of the Related Art As a conventional example of this type of structure, the actual construction of Shokai 61
The one described in JP-A-107165 is known.

In this structure, as shown in FIG. 5, the lead wire holding member 5 is liquid-tightly fixed to the lead wire lead-out hole 3 formed in the wall 1 of the liquid container, and the lead wire formed in the lead wire holding member 5 is fixed. A lead wire 9 composed of a plurality of core wires and an insulating coating is inserted into the insertion hole 7, an insulating coating peeling portion 11 is provided in the middle of the lead wire 9 adjacent to the insertion portion, and the crimping metal fitting 13 is attached to the insulating coating peeling portion 11. And crimping the crimp fitting 13 to the accommodating recess 15 formed in the lead wire holding member 5 as shown in FIG.
It is positioned inside and the filling recess 17 is filled with the filling material 17.

The lead wire 9 is provided with the insulating coating peeling portion 11 and is molded with the filling material 17 to form the lead wire 9.
This is to prevent the oil from leaking from the liquid container through the action of the capillary phenomenon between the core wires. In this case, since the filler 17 has to enter the slight gap between the core wires, an epoxy resin having a low viscosity is mainly used as the filler 17.

In this conventional example, the crimp fitting 13 is provided for connecting the inner and outer lead wires, but in addition to this, the positioning of the lead wire 9 in the longitudinal direction is performed by this. Therefore, the crimping metal fitting 1 is not attached to the middle stripped portion (the portion where the core wire is exposed by stripping the insulating coating in the middle of the lead wire) for the purpose of positioning only, not for connecting the inner and outer lead wires.
3 may be provided. If the positioning accuracy of the crimp fitting 13 is poor in the state where it is solidified with the filling material 17, the lead wire 9 may not be connected to another device.
This positioning needs to be performed accurately.

Conventionally, positioning is performed by aligning the end surface of the crimping metal fitting 13 with the end wall surface of the storage recess 15 formed in the lead wire holding member 5, and in that state, the filling material 17 is filled in the storage recess 15. ing.

[0007]

By the way, the crimp fitting 1
3 is simply housed in the housing recess 15, the crimp fitting 13
However, there is a problem that the pressure-sensitive adhesive fitting 13 is easily removed from the accommodation recess 15 and the crimp fitting 13 floats as shown in FIG. Further, as shown in FIG. 7, there is a gap H required for insertion between the insertion hole 7 and the lead wire 5, but there is also a problem that the filler 17 leaks out from this gap H.

In view of the above circumstances, it is an object of the present invention to provide a lead wire lead-out structure from a liquid container capable of reliably positioning the lead wire and preventing leakage of the filling material. And

[0009]

According to the present invention, a lead wire holding member is liquid-tightly fixed in a lead wire lead-out hole formed in a wall of a liquid container, and a plurality of core wires are inserted in through holes formed in the lead wire holding member. A lead wire consisting of an insulating coating and an insulating coating is inserted, an insulating coating peeling portion is provided on the lead wire adjacent to the insertion portion, and a crimp fitting is crimped to the insulating coating peeling portion, and the crimp fitting is attached to the lead wire holding member. In a lead wire lead-out structure from the inside of a liquid container which is positioned in the formed housing recess and is filled with a filling material in the housing recess, the inner surface of the housing recess has a smaller diameter toward the insertion hole side. A taper surface is formed, and an outer periphery of the tip is formed in a taper shape in which the tip outer periphery slides on the taper surface, and an accommodating chamber for accommodating the crimp fitting therein and lead wires before and after the crimp fitting are inserted. With the insertion hole part to It is characterized in that press-fitting the spacer structure.

[0010]

In order to produce the lead-out structure having the above-mentioned structure, the lead wire is passed through the spacer, and the spacer is press-fitted into the accommodation recess from the tip end side while the crimping metal fitting is accommodated. Then, the outer peripheral surface of the tip of the spacer slides on the tapered surface in the accommodating recess, whereby the spacer is tightened inward. As a result, the insertion hole portion of the lead wire is tightened inward, and the gap between the lead wire and the insertion hole portion is reduced. At the same time, the insertion hole is tightened on the outer circumference of the lead wire, so that the crimp fitting is held so as not to come off. In this case, the spacer itself is also held in the accommodation recess by the reaction force when the spacer is tightened. Then, in the accommodating recess with the spacer pressed in,
The lead wire lead-out structure of the present invention can be obtained by filling the filler.

[0011]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings. The same components as those of the conventional example shown in FIG. 5 are designated by the same reference numerals and the description thereof will be omitted.

FIG. 1 is a sectional view of a main part of a lead wire lead-out structure according to an embodiment. In the figure, 20 is a lead wire holding member, and the accommodating recess 25 of the lead wire holding member 20 is formed to be larger than the conventional one. Insertion hole 7 of accommodation recess 25
The inner surface on the side is formed as a tapered surface 27 whose diameter decreases toward the insertion hole 7 side. The inner surface on the side opposite to the insertion hole 7 is a straight cylindrical surface as it is.

A spacer 30 is press-fitted into the storage recess 25. The spacer 30 is formed in a tapered shape (tapered surface 31) whose outer circumference slides on the tapered surface 27, and an accommodating chamber 32 for accommodating the crimp fitting 13 therein.
Insertion hole part 3 through which the lead wire 9 before and after the crimp fitting 13 is inserted
4 and 36. The spacer 30 has a straight shell shape except for the tapered surface 31 at the tip, and is halved in the circumferential direction. FIG. 2 shows one half of the halved spacer.

The accommodating chamber 32 formed in the spacer 30 is slightly larger than the crimp fitting 13, and has insertion holes 34, 36 for inserting the lead wire 9 through the end wall defining the accommodating chamber 32.
Are formed. The insertion hole portion 34 on the insertion hole 7 side is formed as a straight hole, and its diameter is set so as to come into pressure contact with the outer diameter of the insulating coating of the lead wire 9. Further, the insertion hole portion 36 on the opposite side is formed in an outwardly tapered shape so that the filling material 17 can easily enter, and its diameter is set to a value having a margin with respect to the insulating coating peeling portion 11. There is. However, of course, the size is such that the crimp fitting 13 does not come off with the spacer 30 closed.

Next, a method for press-fitting the spacer 30 into the accommodation recess 25 will be described with reference to FIGS.

First, the crimp fitting 13 is positioned in the accommodation chamber 32 of the half spacer 30, and the lead wires 9 before and after the crimp fitting 13 are positioned in the insertion holes 34 and 36, respectively. In that state, the spacer 30 is closed, and the tip of the lead wire 9 is passed through the insertion hole 7 of the lead wire holding member 20 in that posture, and the spacer 30 is inserted into the accommodation recess 25. The tapered surface 27 of the spacer 30 is attached to the tapered surface 27 in the accommodation recess 25.
When 1 hits, the spacer 30 is further press-fitted.

Then, the spacer 30 is tightened inward by the action of the inclined surfaces of the tapered surfaces 27 and 31. As a result, the insertion hole portion 34 of the lead wire 9 is tightened inward, and the gap between the lead wire 9 and the insertion hole portion 34 becomes smaller. At the same time, the insertion hole portion 36 on the opposite side is tightened on the outer circumference of the lead wire 9, so that the crimp fitting 13 is held so as not to come off.

In the press-fitted state, a pressure contact force acts between the spacer 30 and the wall surface of the accommodating recess 25, so that the spacer 30 itself is strongly held in the accommodating recess 25 by the frictional force.

Next, as shown in FIG. 1, the filling material 17 is filled in the accommodation recess 25. Then, the filling material 17 enters the accommodation chamber 32 through the tapered insertion hole 36 and permeates the crimp fitting 13 and the insulating coating peeling portion 11.

The spacer 30 may have a divided structure other than the half-divided structure, or the divided structure may be connected by a hinge. Further, as the material, rubber or soft resin may be used.

[0021]

As described above, according to the present invention,
The crimp fitting is housed in the spacer that is tightened by press-fitting it into the accommodating recess of the lead wire holding member, and the lead wire is passed through the insertion hole provided in the spacer. Retained. Further, the tightening of the insertion hole reduces the gap between the insertion hole and the lead wire. Therefore, both the problem of displacement of the crimp fitting and the problem of leakage of the filler are solved.

[Brief description of drawings]

FIG. 1 is a sectional view of an essential part of an embodiment of the present invention.

FIG. 2 is a perspective view of a spacer half body according to an embodiment of the present invention.

FIG. 3 is a side sectional view showing how to press fit a spacer in one embodiment of the present invention.

FIG. 4 is a perspective view showing how to press-fit a spacer in one embodiment of the present invention.

FIG. 5 is a side sectional view showing a conventional lead wire lead-out structure.

6 is a cross-sectional view showing the main parts of FIG.

FIG. 7 is a cross-sectional view of a main part shown for explaining the problems of the conventional example.

FIG. 8 is a cross-sectional view of a main part shown for explaining another problem of the conventional example.

[Explanation of symbols]

 1 Wall of Liquid Container 3 Lead Wire Deletion Hole 7 Insertion Hole 9 Lead Wire 11 Insulation Coating Peeling Part 13 Crimping Metal Fitting 17 Filling Material 20 Lead Wire Holding Member 25 Storage Recess 27 Tapered Surface 30 Spacer 31 Tapered Surface 32 Storage Chamber 34, 36 Insertion Hole

Claims (1)

[Claims] 1. A lead wire holding member is liquid-tightly fixed to a lead wire lead-out hole formed in a wall of a liquid container, and a lead wire composed of a plurality of core wires and an insulating coating is provided in an insertion hole formed in the lead wire holding member. Through, the insulating wire peeling portion is provided on the lead wire adjacent to the insertion portion, the crimping metal fitting is crimped to the insulating wire peeling portion, and the crimping metal fitting is positioned in the accommodating recess formed in the lead wire holding member. In the lead wire lead-out structure from the inside of the liquid container in which the filling material is filled in the accommodation recess, a tapered surface is formed on the inner surface of the accommodation recess, the diameter of which decreases toward the insertion hole side. In the storage recess,
A spacer having a split structure, in which the outer circumference of the tip is formed in a taper shape that slides on the tapered surface and has an accommodation chamber for accommodating the crimp fitting and an insertion hole portion for inserting lead wires before and after the crimp fitting, is press-fitted. Lead wire lead-out structure from inside the liquid container.