JP2005027446A - Terminal structure of cable with shield layer - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide the inexpensive terminal structure of a cable with a shield layer that is grounded to an object to be attached and can be easily attached thereto in a watertight manner. <P>SOLUTION: In the terminal structure 25 of the cable 1 with the shield layer an outer skin 2 is cut from the end of the cable 1 with the shield layer, the shield layer 3 exposed from below the outer skin 2 is grounded to the object 5 to be attached, and the cable 1 with the shield layer is attached to the object 5 to be attached in a watertight manner. In the terminal structure, a metal sleeve 4 is laid over the outer skin 2 of the cable 1 with the shield layer, the shield layer 3 is folded at the end of the outer skin 2 and laid over the external periphery of the metal sleeve 4, cylindrical mounting hardware 7 comprising a flange 6 fixed to the object 5 to be attached is attached to the external periphery of the folded shield layer 3, the end of the cylindrical mounting hardware 7 is caulked and firmly fixed to the cable 1 with the shield layer, and external peripheries of the cylindrical hardware 7 and the outer skin 2 are coated with a heat-shrinkable tube 16. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a terminal structure of a cable with a shield layer connected to a watertight electric device such as a battery, an inverter and a motor of an electric vehicle.
[0002]
[Prior art]
As a terminal structure of a cable with a shield layer wired between a battery and an inverter of an electric vehicle or between an inverter and a motor, the one described in Patent Document 1 is known.
[0003]
As shown in FIG. 6, the cable 50 with a shield layer is obtained by covering a core wire 51 with an insulating layer 52, a shield layer 53, and an outer skin 54 in order. In the terminal structure 55 of the cable 50, the outer layer 54 of the cable 50 with the shield layer is peeled to expose the shield layer 53, and one end of a metal small-diameter sleeve 56 is inserted inside the shield layer 53, A metal large-diameter sleeve 57 is put on the outer periphery of the outer skin 54, the large-diameter sleeve 57 is caulked inward in the radial direction, and the other end of the small-diameter sleeve 56 is press-fitted into a conductive flange 59 fixed to a shield wall 58 such as an inverter. It is configured. The shield layer 53 is connected to the conductive flange 59 via the small-diameter sleeve 56 so that the shield layer-attached cable 50 is attached to the shield wall 58 in a grounded state.
[0004]
Further, the housing 61 is integrally resin-molded so as to collectively cover the waterproof cylindrical portion 60 preliminarily molded on the outer skin 54, the large-diameter sleeve 57, the small-diameter sleeve 56, and the cable peripheral portion of the conductive flange 59. Thus, the shield portion between the shield layer 53 and the conductive flange 59 is waterproofed.
[0005]
[Patent Document 1]
JP 2001-313100 A [Patent Document 2]
Japanese Patent Laid-Open No. 2002-260773 [Patent Document 3]
JP-A-2002-270281 [0006]
[Problems to be solved by the invention]
However, the above-described terminal structure 55 has a large number of parts, and has a problem in that the yield cannot be increased because the housing 61 is manufactured by molding, and the cost is increased. Furthermore, since the small-diameter sleeve 56 is also deformed by caulking the large-diameter sleeve 57, the electrically important insulating layer 52 may be damaged.
[0007]
SUMMARY OF THE INVENTION Accordingly, an object of the present invention is to solve the above-described problems and provide an inexpensive terminal structure of a cable with a shield layer that can be grounded to an attachment object and easily attached in a watertight manner.
[0008]
[Means for Solving the Problems]
In order to achieve the above object, the present invention cuts the outer skin from the end of the cable with the shield layer, grounds the shield layer exposed from under the outer skin to the object to be attached, and attaches the shield layer to the object to be attached. In the terminal structure of the cable with the shield layer to which the cable is attached in a watertight manner, a metal sleeve is put on the outer cover of the cable with the shield layer, the shield layer is folded at the end portion of the outer cover, and is put on the outer periphery of the metal sleeve. A cylindrical bracket having a flange portion to be fixed to the mounting object is attached to the outer periphery of the folded shield layer, and the end of the cylindrical bracket is caulked to be fixed to the cable with the shield layer. The outer periphery of the outer skin is covered with a heat shrinkable tube.
[0009]
A resin layer may be disposed in the gap between the outer cover of the cable with the shield layer and the cylindrical metal fitting so as to seal the gap.
[0010]
The metal sleeve has an insertion portion to be inserted into the attachment object and a protrusion portion that protrudes outside the attachment object, and the protrusion is attached to the outer periphery of the folded shield layer, The insertion portion may be inserted through an insulating layer exposed from below the shield layer.
[0011]
An annular seal may be provided on the outer periphery of the insertion portion to seal between the attachment object.
[0012]
In addition, a groove for fixing the end of the heat shrinkable tube may be formed on the outer periphery of the protrusion.
[0013]
A plurality of the grooves may be formed in the axial direction on the outer periphery of the protruding portion.
[0014]
And it is good for the outer periphery of the said cylindrical metal fitting to form the enlarged diameter part for enlarging the depth of the said groove | channel adjacent to the said groove | channel.
[0015]
In addition, the outer layer is cut off from the end of the cable with the shield layer, the shield layer exposed from under the outer layer is grounded to the object to be attached, and the cable with the shield layer is attached to the object to be attached in a watertight manner In the terminal structure, a metal sleeve is put on the outer cover of the cable with the shield layer, the shield layer is folded at the end portion of the outer cover, and is put on the outer periphery of the metal sleeve. A cylindrical fitting having a flange portion to be fixed to an object to be attached and having an end portion opened in a trumpet shape is attached so that one end portion extends in the axial direction from the shield layer, and the cylindrical fitting is attached to the shield. Caulking from above the layer to fix to the cable with shield layer, and embedding to seal between the cable with shield layer in one end of the cylindrical fitting It is provided with a Lumpur.
[0016]
DETAILED DESCRIPTION OF THE INVENTION
Preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings.
[0017]
As shown in FIGS. 1 and 2, the outer skin 2 is cut off at the end of the shielded cable 1, and the shield layer 3 is exposed from under the outer skin 2. A metal sleeve 4 is placed on the outer skin 2. The metal sleeve 4 is formed in a cylindrical shape having a predetermined length in the axial direction, and is set to have an inner diameter that is in close contact with the outer skin 2 with almost no gap when the cable 1 with the shield layer is inserted.
[0018]
The shield layer 3 exposed from under the cut outer skin 2 is folded at the end position of the outer skin 2 and is placed on the outer periphery of the metal sleeve 4. That is, the shield layer 3 is turned upside down at the end position of the outer skin 2, extends in the opposite direction, and covers the outer periphery of the metal sleeve 4. Further, the shield layer 3 has its tip cut off at the end of the metal sleeve 4 so as not to protrude from a cylindrical fitting 7 described later.
[0019]
A cylindrical fitting 7 having a flange portion 6 fixed to the attachment object 5 is attached to the outer periphery of the folded shield layer 3. The cylindrical metal fitting 7 is for fixing the cable 1 with the shield layer to the attachment object 5 that is a casing of the electronic device and grounding the shield layer 3 to the attachment object 5. It is fixed to the attached cable 1. The cylindrical fitting 7 is formed in a substantially cylindrical shape with a metal having springiness and plasticity, specifically, brass (brass), and constitutes a housing that surrounds the outer periphery of the cable 1 with the shield layer. . The cylindrical metal fitting 7 has an insertion portion 8 that is formed on one end side in the axial direction and is inserted into the attachment object 5, and a projection portion 9 that is formed on the other end side and protrudes outside the attachment object 5.
[0020]
The protruding portion 9 is attached to the outer periphery of the folded shield layer 3, and has a large diameter hole 10 into which the folded shield layer 3 formed by extending a predetermined length in the axial direction from the protruding end can be inserted, and a large diameter An insertion restricting portion 11 for restricting the insertion depth of the shield layer 3 is formed in the depth of the hole 10 and reduced in a funnel shape, and is formed from the bottom of the insertion restricting portion 11 and exposed from below the shield layer 3. A small-diameter hole 13 for inserting the insulating layer 12 is provided. A resin layer 14 for sealing the gap between the outer skin 2 of the shielded cable 1 and the cylindrical metal fitting 7 is disposed in the opening in the large-diameter hole 10, and tries to enter through the surface of the outer skin 2. Stops water. The resin layer 14 is made of a hot-melt type material that melts at 100 to 170 ° C. Specifically, the resin layer 14 is made of polyolefin. Further, the resin layer 14 is formed so as to protrude from the large-diameter hole 10 and cover the entire circumference of the protruding end of the protruding portion 9, so as to block the large-diameter hole 10 more tightly. The projecting portion 9 is formed with an engaging convex portion 15 to be engaged with a flange portion 6 described later with an enlarged outer diameter, and an outer periphery for fixing an end portion of a heat shrinkable tube 16 described later. The groove 17 is formed by reducing the outer diameter.
[0021]
The insertion portion 8 is for inserting the insulating layer 12 exposed from under the shield layer 3, and a small-diameter hole 13 extending from the protruding portion 9 is formed. In addition, an annular seal 18 is provided on the outer periphery of the insertion portion 8 to seal between the attachment object 5. Specifically, the annular seal 18 is formed of an O-ring and is accommodated and provided in an annular accommodation groove 19 formed on the outer periphery of the insertion portion 8. Furthermore, the end of the insertion portion 8 is formed so as to be reduced in multiple steps toward the tip, and can be easily inserted into the attachment object 5.
[0022]
The flange portion 6 has an attachment hole 21 for inserting and attaching the insertion portion 8, and is provided integrally on the outer periphery of the insertion portion 8. The flange portion 6 has a bolt hole 23 through which the bolt 22 is inserted, and is attached to the attachment object 5 via the bolt 22.
[0023]
Moreover, the cylindrical metal fitting 7, the resin layer 14, and the outer skin | cover 2 are coat | covered with the heat contraction tube 16, and the further waterproofing is given. The heat shrinkable tube 16 also has a function as a protective film such as the resin layer 14. That is, the heat shrinkable tube 16 prevents dust and oil from directly attaching to the resin layer 14 and the like, and shields the resin layer 14 and the like from outside air and ultraviolet rays. As a result, deterioration of the resin layer 14 and the like due to aging and the like is suppressed, and the life of the resin layer 14 and the like is extended. The heat-shrinkable tube 16 is made of a resin that heat-shrinks when it exceeds a predetermined temperature. It comes to be attached with.
[0024]
In particular, the heat-shrinkable tube 16 is prevented from being displaced in the axial direction by entering one end of the heat-shrinkable tube 16 into the outer-periphery groove 17 by heat-shrinking with the outer-periphery groove 17. Specifically, the heat-shrinkable tube 16 has a property of shrinking when it exceeds a predetermined shrinkage start temperature even after being shrunk, and tends to shift to a smaller diameter side by this shrinking force. A test body (not shown) that differs from the above-described terminal structure 25 only in that it does not actually have the outer peripheral groove 17 was prepared, and when this test body was heated to 120 ° C. for 24 hours, a heat-shrinkable tube was obtained. The phenomenon that 16 shifted | deviated occurred. For this reason, one end of the heat shrinkable tube 16 is placed in the outer peripheral groove 17 to prevent the one end portion from moving in the axial direction and to prevent the heat shrinkable tube 16 from being displaced. The heat shrinkable tube 16 may have an inner layer made of hot melt. Thereby, the sealing performance between the cylindrical metal fitting 7 and the outer skin 2 can be further enhanced.
[0025]
Next, the operation of this embodiment will be described.
[0026]
When attaching the end of the cable 1 with shield layer to the attachment object 5, the outer skin 2 is cut from the end of the cable 1 with shield layer, and the metal sleeve 4 is put on the outer skin 2 of the cable 1 with shield layer. Then, the exposed shield layer 3 is folded back at the end portion position of the outer skin 2 to cover the outer periphery of the metal sleeve 4.
[0027]
Thereafter, the cable 1 with the shield layer is inserted into the cylindrical metal fitting 7, the cylindrical metal fitting 7 is attached to the outer periphery of the shield layer 3, and the hot melted in advance in the gap between the cylindrical metal fitting 7 and the outer skin 2 Fill with melt. And before hot-melt solidifies, the edge part of the cylindrical metal fitting 7 is crimped, and the cylindrical metal fitting 7 is fixed to the cable 1 with a shield layer. The hot melt solidifies to form the resin layer 14.
[0028]
And the outer periphery of the cylindrical metal fitting 7 and the outer skin 2 is covered with a heat shrinkable tube 16, the insertion portion 8 of the cylindrical metal fitting 7 is inserted into the through hole 24 of the attachment object 5, and the flange portion 6 is bolted. The end of the cable 1 with the shield layer can be easily attached to the attachment object 5.
[0029]
Since the space between the mounting object 5 and the cylindrical metal fitting 7 is sealed by the annular seal 18 and the space between the cylindrical metal fitting 7 and the cable 1 with the shield layer is sealed by the resin layer 14, the mounting object 5 Water does not enter inside.
[0030]
The cable 1 with the shield layer is grounded by connecting the shield layer 3 to the cylindrical metal fitting 7 inserted into the attachment object 5.
[0031]
Since the shield layer-equipped cable 1 has the outer shell 2 caulked relatively firmly to the cylindrical fitting 7, it does not come out of the cylindrical fitting 7 even if it is pulled.
[0032]
In this way, the metal sleeve 4 is covered on the outer cover 2 of the cable 1 with the shield layer, the shield layer 3 is folded at the end position of the outer cover 2 and is covered on the outer periphery of the metal sleeve 4, and the outer periphery of the folded shield layer 3 is covered. The cylindrical metal fitting 7 having the flange portion 6 to be fixed to the attachment object 5 is attached, the end of the cylindrical metal fitting 7 is caulked and fixed to the cable 1 with the shield layer, and the outer circumference of the cylindrical metal fitting 7 and the outer skin 2 Since the terminal structure 25 of the cable 1 with the shield layer is configured by covering with the heat shrinkable tube 16, the cable 1 with the shield layer can be easily attached to the attachment object 5 in a short time while being grounded. And the number of parts can be reduced and cost can be reduced. Furthermore, since the metal sleeve 4 is covered on the outer skin 2 and caulked with the cylindrical metal fitting 7 on the metal sleeve 4, the insulating layer 12 can be prevented from being damaged.
[0033]
And since the resin layer 14 is arrange | positioned so that the clearance gap may be sealed in the clearance gap between the outer sheath 2 and the cylindrical metal fitting 7 of the cable 1 with a shield layer, water infiltrates in the cylindrical metal fitting 7 along the outer skin 2. It is possible to prevent the water from entering the attachment object 5 from the inside of the cylindrical fitting 7.
[0034]
Further, the metal sleeve 4 has an insertion portion 8 to be inserted into the attachment object 5 and a protrusion 9 that protrudes outside the attachment object 5. The protrusion 9 is attached to the outer periphery of the folded shield layer 3. Since the insertion portion 8 allows the insulating layer 12 exposed from under the shield layer 3 to be inserted, the terminal structure 25 can be simplified.
[0035]
And since the annular seal 18 for sealing between the attachment objects 5 is provided in the outer periphery of the insertion part 8, between the cylindrical metal fitting 7 and the attachment objects 5 is easily sealed with a simple structure. be able to.
[0036]
Moreover, since the outer periphery groove | channel 17 for fixing the edge part of the heat contraction tube 16 is formed in the outer periphery of the protrusion part 9, the position of the heat contraction tube 16 can be easily stabilized with a simple structure.
[0037]
And since protection of the resin layer 14 which seals between the cylindrical metal fitting 7 and the cable 1 with a shield layer is performed by the heat shrinkable tube 16, it can be removed from the attachment object 5 as compared with the case where the resin layer 14 is protected by a wire seal or the like. The outer diameter of the portion protruding to the outside can be reduced.
[0038]
In addition, although the cylindrical metal fitting 7 shall be formed with brass, other metals, such as aluminum, may be sufficient as long as it is a material which does not caulk.
[0039]
In addition, the resin layer 14 is made of a hot-melt type material, but may be any material that can be solidified, and may be formed of a two-component adhesive that mixes and solidifies two components.
[0040]
And although the outer peripheral groove | channel 17 shall be provided in the outer periphery of the cylindrical metal fitting 7, as shown in FIG. 3, it is good also as what is formed in the outer periphery of the protrusion part 30 along with the axial direction. As shown in FIG. 4, an enlarged diameter portion 32 for increasing the depth of the outer peripheral groove 17 may be formed adjacent to the outer peripheral groove 17 on the outer periphery of the cylindrical metal member 31. As a result, the position of the heat shrinkable tube 16 can be more reliably stabilized.
[0041]
Another embodiment will be described.
[0042]
The terminal structure 40 of the cable 1 with the shield layer shown in FIG. 5 is a type in which the heat-shrinkable tube 16 is not used by changing the sealing structure between the above-described cylindrical metal fitting 7 and the outer skin 2. Constituent elements and operations similar to those described above are given the same reference numerals in the drawings, and description thereof is omitted.
[0043]
As shown in FIG. 5, the outer skin 2 is cut off from the end of the cable 1 with the shield layer, and the shield layer 3 is exposed from under the outer skin 2. A metal sleeve 4 is covered on the outer cover 2 of the cable 1 with the shield layer, and the shield layer 3 folded at the end position of the outer cover 2 is covered on the outer periphery of the metal sleeve 4. On the outer periphery of the shield layer 3, a cylindrical metal fitting 41 having a flange portion 6 fixed to the attachment object 5 and having one end portion 42 opened in a trumpet shape extends from the shield layer 3 in the axial direction. It is attached so that it can be put out. The cylindrical metal fitting 41 is caulked from above the shield layer 3 and fixed to the cable 1 with the shield layer. An embedded seal 43 that seals between the cable 1 with the shield layer is provided in one end portion 42 of the cylindrical metal fitting 41. The embedded seal 43 is made of a hot-melt type material that melts at 100 to 170 ° C. Specifically, the embedded seal 43 is made of polyolefin.
[0044]
The operation of this embodiment will be described.
[0045]
When attaching the end of the cable 1 with shield layer to the attachment object 5, the outer skin 2 is cut from the end of the cable 1 with shield layer, and the metal sleeve 4 is put on the outer skin 2 of the cable 1 with shield layer. Then, the exposed shield layer 3 is folded back at the end portion position of the outer skin 2 to cover the outer periphery of the metal sleeve 4.
[0046]
Thereafter, the cable 1 with the shield layer is inserted into the cylindrical metal fitting 41, the cylindrical metal fitting 41 is attached to the outer periphery of the shield layer 3, and the cylindrical metal fitting 41 is caulked to the cable 1 with the shield layer. To fix. Since the one end part 42 of the cylindrical metal fitting 41 is opened in a trumpet shape, the insertion of the cable 1 with the shield layer into the cylindrical metal fitting 41 can be easily performed.
[0047]
And the hot melt melt | dissolved previously is filled in the one end part 42 of the cylindrical metal fitting 41 opened in the trumpet shape. When the hot melt is solidified and the embedded seal 43 is formed, the insertion portion 8 of the cylindrical metal fitting 41 is inserted into the through hole 24 of the attachment object 5 and the flange portion 6 is bolted.
[0048]
Thus, the end portion of the shielded cable 1 can be easily attached to the attachment object 5.
[0049]
Since the space between the mounting object 5 and the cylindrical metal fitting 41 is sealed by the annular seal 18 and the space between the cylindrical metal fitting 41 and the shielded cable 1 is sealed by the embedded seal 43, the mounting object Water does not enter inside 5 from the outside.
[0050]
As described above, since the one end portion 42 opened in the trumpet shape is extended from the shield layer 3 in the axial direction and the embedded seal 43 is provided in the one end portion 42, the heat shrinkable tube can be omitted, The cable 1 with the shield layer can be easily attached to the object 5 in a short time, and the cost can be reduced. Moreover, since a heat-shrinkable tube is not used, the length of the terminal structure part protruding from the attachment object 5 can be shortened.
[0051]
【The invention's effect】
In short, according to the present invention, the following excellent effects can be obtained.
(1) The cable with the shield layer can be easily attached to the attachment object.
(2) The terminal structure of the cable with the shield layer can be made inexpensive.
[Brief description of the drawings]
FIG. 1 is a side sectional view of a terminal structure of a cable with a shield layer showing a preferred embodiment of the present invention.
FIG. 2 is a cross-sectional view taken along the line II-II in FIG.
FIG. 3 is a cross-sectional side view of a main part of a terminal structure of a cable with a shield layer showing another embodiment.
FIG. 4 is a cross-sectional side view of a main part of a terminal structure of a cable with a shield layer showing another embodiment.
FIG. 5 is a sectional side view of a terminal structure of a cable with a shield layer showing another embodiment.
FIG. 6 is a side sectional view of a terminal structure of a conventional cable with a shield layer.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Cable with shield layer 2 Outer skin 3 Shield layer 4 Metal sleeve 5 Attachment object 6 Flange part 7 Cylindrical metal fitting 8 Insertion part 9 Protrusion part 12 Insulating layer 14 Resin layer 16 Heat shrinkable tube 17 Outer peripheral groove (groove)
18 annular seal 25 terminal structure 32 enlarged diameter part 40 terminal structure 41 cylindrical fitting 42 one end part 43 embedded seal

Claims (8)

The end of the cable with the shield layer is cut off from the end of the cable with the shield layer, and the shield layer exposed from under the cover is grounded to the object to be attached, and the cable with the shield layer is attached to the object to be attached in a watertight manner. In the structure, a metal sleeve is put on the outer sheath of the cable with the shield layer, the shield layer is folded at the end portion of the outer shell, and is put on the outer periphery of the metal sleeve. A cylindrical fitting having a flange portion to be fixed to an object is attached, and the end of the cylindrical fitting is caulked and fixed to a cable with a shield layer, and the outer circumference of the cylindrical fitting and the outer cover is covered with a heat shrinkable tube. The terminal structure of a cable with a shield layer characterized by The terminal structure of a cable with a shield layer according to claim 1, wherein a resin layer is disposed in a gap between the outer cover of the cable with the shield layer and the cylindrical metal fitting so as to seal the gap. The metal sleeve has an insertion part to be inserted into the attachment object and a protrusion part that protrudes outside the attachment object, and the protrusion part is attached to the outer periphery of the folded shield layer, and the insertion part The terminal structure of the cable with a shield layer according to claim 1 or 2, wherein an insulating layer exposed from under the shield layer is inserted. The terminal structure of the cable with a shield layer according to claim 3, wherein an annular seal is provided on the outer periphery of the insertion portion to seal between the attachment object. The terminal structure of the cable with a shield layer according to claim 3 or 4, wherein a groove for fixing an end of the heat shrinkable tube is formed on an outer periphery of the protrusion. The terminal structure of a cable with a shield layer according to claim 5, wherein a plurality of the grooves are formed in the axial direction on the outer periphery of the protruding portion. The terminal structure of a cable with a shield layer according to claim 5 or 6, wherein an enlarged diameter portion for increasing the depth of the groove is formed adjacent to the groove on an outer periphery of the cylindrical metal fitting. The end of the cable with the shield layer is cut off from the end of the cable with the shield layer, and the shield layer exposed from under the cover is grounded to the object to be attached, and the cable with the shield layer is attached to the object to be attached in a watertight manner. In the structure, a metal sleeve is put on the outer sheath of the cable with the shield layer, the shield layer is folded at the end portion of the outer shell, and is put on the outer periphery of the metal sleeve. A cylindrical fitting having a flange portion to be fixed to an object and having one end portion opened in a trumpet shape is attached so that one end portion extends from the shield layer in the axial direction, and the cylindrical fitting is attached to the shield layer. An embedded seal that is caulked from above and fixed to a cable with a shield layer, and seals between the cable with the shield layer in one end of the cylindrical fitting Terminal structure of the shielding layer cable, characterized in that provided.

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