JP3017613B2 - Derivation structure of lead wire from inside liquid container - Google Patents

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 a wire harness for operating a solenoid or a lead wire of various sensors from a liquid container such as a transmission case for a vehicle.

[0002]

2. Description of the Related Art As a conventional example of this type of structure, Japanese Utility Model Application Laid-open No.
The thing described in -107165 gazette is known.

In this structure, as shown in FIG. 5, a lead wire holding member 5 is liquid-tightly fixed in a lead wire outlet hole 3 formed in a wall 1 of a liquid container, and a lead wire formed in the lead wire holding member 5 is provided. 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 stripping part 11 is provided in the middle of the lead wire 9 adjacent to the insertion point, and a crimp fitting 13 is attached to the insulating coating stripping part 11. As shown in FIG. 6, the crimp fitting 13 is accommodated in the accommodation recess 15 formed in the lead wire holding member 5.
And a filling member 17 is filled in the housing recess 15.

The reason why the insulating coating stripping portion 11 is provided on the lead wire 9 and that portion is molded with the filler 17 is as follows.
This is to prevent oil from leaking from the liquid container due to the action of the capillary phenomenon through the gap between the core wires. In this case, an epoxy resin having a low viscosity is mainly used as the filler 17 because the filler 17 has to enter a small gap between the core wires.

In this conventional example, the crimping fitting 13 is provided for connecting the inner and outer lead wires. In addition, the crimping fitting 13 is used to position the lead wire 9 in the longitudinal direction. Therefore, the crimping metal fitting 1 is attached to the middle stripped portion (the portion where the insulating coating in the middle of the lead wire is stripped to expose the core wire) only for the purpose of positioning, not for connecting the inner and outer lead wires.
3 may be provided. If the positioning accuracy of the press fitting 13 is poor in the state of being fixed with the filler 17, the lead wire 9 may not be able to be connected to another device.
This positioning needs to be performed with high accuracy.

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

[0007]

The crimping fitting 1
3 is simply stored in the recess 15.
8 easily comes out of the accommodation recess 15, causing the press fitting 13 to float as shown in FIG. 8 when the filling material 17 is injected, resulting in a problem that positioning accuracy is reduced. 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 the gap H.

The present invention has been made in consideration of the above circumstances, and has as its object to provide a lead wire lead-out structure that can reliably position a lead wire and prevent leakage of a filler material from a liquid container. And

[0009]

According to the present invention, 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 plurality of core wires are inserted into an insertion hole formed in the lead wire holding member. And a lead wire made of an insulating coating, and an insulating coating peeling part is provided on the lead wire adjacent to the insertion point, and a crimping fitting is crimped to the insulating coating peeling part, and the crimping fitting is attached to the lead wire holding member. In the lead-out structure of the lead wire from the inside of the liquid container which is positioned in the formed accommodation recess and is filled with a filler in the accommodation recess, the inner surface of the accommodation recess has a smaller diameter toward the insertion hole side. To form a tapered surface, and the outer periphery of the leading end slides on the tapered surface.
Formed, and when the lead wires before and after the crimp fitting are inserted
Both the inner circumference of the tip has an insertion hole that clamps the lead wire,
The crimp fitting is housed inside and the filling material is
Of a divided structure having a storage chamber filled around the tool
The sensor is press-fitted into the housing recess .

[0010]

In order to make the lead-out structure of the above construction, a lead wire is passed through the spacer, and the spacer is pressed into the receiving recess from the front end side in a state in which the crimp fitting is stored. Then, the outer peripheral surface of the distal end of the spacer slides on the tapered surface in the accommodation concave portion, whereby the spacer is tightened inward. Thereby, the insertion hole of the lead wire is tightened inward, and the gap between the lead wire and the insertion hole is reduced. At the same time, the insertion hole is tightened to the outer periphery 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 receiving recess due to the reaction force when the spacer is tightened. Then, the lead-out structure of the present invention can be obtained by filling a filling material into the accommodation recess in which the spacer is press-fitted. Further, by filling the periphery of the crimp fitting with the filler, the filler easily flows between the core wires of the lead wires and between the core wire and the crimp fitting.

[0011]

An embodiment of the present invention will be described below with reference to the drawings. Note that the same components as those in the conventional example of FIG. 5 are denoted by the same reference numerals, and 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, reference numeral 20 denotes a lead wire holding member, and the accommodating recess 25 of the lead wire holding member 20 is formed larger than before. 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 opposite to the insertion hole 7 is a straight cylindrical surface as it is.

A spacer 30 is press-fitted in the storage recess 25. The spacer 30 is formed in a tapered shape (tapered surface 31) in which the outer periphery of the tip slides on the tapered surface 27, and a housing chamber 32 for housing the crimp fitting 13 therein,
Insertion hole 3 through which lead wires 9 before and after crimping fitting 13 are 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 half-spaced spacer.

The accommodation chamber 32 formed in the spacer 30 is slightly larger than the crimping fitting 13, and insertion holes 34, 36 for passing the lead wire 9 are formed in an end wall defining the accommodation 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 be pressed against the outer diameter of the insulating coating of the lead wire 9. The insertion hole 36 on the opposite side is formed in an outwardly tapered shape so that the filler 17 can easily enter, and the diameter thereof is set to a value having a margin with respect to the insulating coating peeling portion 11. I have. However, it is a matter of course that the size is such that the crimping fitting 13 does not come off when the spacer 30 is closed.

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

First, the crimping fitting 13 is positioned in the accommodating chamber 32 of the half spacer 30, and the lead wires 9 before and after the crimping fitting 13 are positioned in the insertion holes 34 and 36, respectively. In this state, the spacer 30 is closed, the leading end of the lead wire 9 is passed through the insertion hole 7 of the lead wire holding member 20 with the posture, and the spacer 30 is inserted into the accommodation recess 25. The taper surface 3 of the spacer 30 is provided on the taper surface 27 in the accommodation recess 25.
The spacer 30 is further press-fitted at the stage where 1 hits.

Then, the spacer 30 is tightened inward by the action of the slopes of the tapered surfaces 27 and 31. Thereby, the insertion hole 34 of the lead wire 9 is tightened inward, and the gap between the lead wire 9 and the insertion hole 34 is reduced. At the same time, the insertion hole 36 on the opposite side is tightened to the outer periphery 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 pressing force acts between the spacer 30 and the wall surface of the housing recess 25, so that the spacer 30 itself is strongly held in the housing recess 25 by the frictional force.

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

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

[0021]

As described above, according to the present invention,
The crimp fitting is housed in a spacer with a structure that is tightened by press-fitting into the housing recess of the lead wire holding member, and the lead wire is passed through the insertion hole provided in the spacer. Will be retained. Further, since the gap between the insertion hole and the lead wire is reduced by tightening the through hole, both the problem of displacement of the crimp fitting and the problem of leakage of the filler are solved. Furthermore, since the lead wire is sandwiched by the inner periphery of the distal end of the insertion hole, the crimp fitting is held at a fixed position in the accommodation chamber, so that the filler is filled around the crimp fitting. The filler easily flows between the core wires and between the crimping fitting and the core wire, and it is possible to reliably prevent oil from leaking from these gaps due to the action of the capillary action.

[Brief description of the drawings]

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

FIG. 2 is a perspective view of a half of a spacer according to one 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 a method of press-fitting a spacer in one embodiment of the present invention.

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

FIG. 6 is a sectional view showing a main part of FIG. 5;

FIG. 7 is a cross-sectional view of a main part for describing a problem of a conventional example.

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

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Liquid container wall 3 Lead wire lead-out hole 7 Insertion hole 9 Lead wire 11 Insulating coating peeling part 13 Crimp fitting 17 Filler 20 Lead wire holding member 25 Housing recess 27 Tapered surface 30 Spacer 31 Tapered surface 32 Housing chamber 34, 36 Insertion Hole

Continuation of the front page (56) References JP-A-59-215685 (JP, A) JP-A-5-242921 (JP, A) JP-A-4-76086 (JP, U) JP-A-62-1119147 (JP) , U) Actually open 48-68800 (JP, U) Actually open 1975-42298 (JP, U) Actually open 1980-187978 (JP, U) Actually open 1960-8906 (JP, U) Actually open 49-129086 (JP, U) JP-A 61-107165 (JP, U) JP-A 42-1577 (JP, Y1) JP-A 51-9648 (JP, Y1) (58) Fields surveyed (Int. Cl. ⁷ , DB name) H01R 9 / 16,4 / 70

Claims (1)

(57) [Claims] 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 lead wire including a plurality of core wires and an insulating coating is inserted into an insertion hole formed in the lead wire holding member. Is provided on the lead wire adjacent to the insertion point, an insulation coating peeling portion is provided, and a crimping metal fitting is crimped to the insulating coating peeling portion, and the crimping metal fitting is positioned in a receiving recess formed in the lead wire holding member. In the lead-out structure of the lead wire from the inside of the liquid container formed by filling the inside of the accommodation concave portion with a filler, an inner surface of the accommodation concave portion is formed with a tapered surface having a diameter decreasing toward the insertion hole side, The outer circumference of the tip is
Formed in a tapered shape that slides on the
The front and rear leads are inserted, and the
Insertion hole for holding the wire and the crimping fitting inside
And the filling material is filled around the crimp fitting
A lead-out structure from inside a liquid container, wherein a spacer having a divided structure having a chamber is press-fitted into a housing recess .