JP2007335379A - Wire harness - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a wire harness which has a shielding property and is easy in a terminal processing and is excellent in a heat radiating effect. <P>SOLUTION: The wire harness is composed of female terminals 2 connected with cables 1, female terminal housing parts 4a, 4b, 4c to house a part of the cable 1 and the female terminal 2, a female housing 3 in which a plurality of the female terminal housing parts 4a, 4b, 4c are arranged in parallel at a predetermined pitch, a shield cover 10 which covers an outer circumference of the female housing 3 and a part of which is covered by an end part of a braided wire 11, a shielding braided wire 11 of a cylindrical shape to cover the cables 1 keeping spaces between a plurality of cables 1 exposed from a plurality of female housings 3, respectively, a male terminal 23 connected with the female terminal 2, and a male housing 20 to house the male terminal 23. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a wire harness, and more particularly to a wire harness having a structure for shielding the periphery of a covered electric wire.

  Since a motor used in a hybrid electric vehicle (HEV) is a three-phase AC drive, three wire harnesses that electrically connect the inverter and the motor are required. Further, the battery for driving the motor has a high voltage, and two wire harnesses are required separately from the low-voltage 12V system. Therefore, two and three covered wires for power transmission and reception used in the hybrid system in HEV are routed.

  In addition, power transmission / reception power between the inverter, battery, and motor is large, and since the AC frequency is high, the wire harness may become a noise source, and the HEV wire harness needs to ensure a shielding function. It becomes.

  When HEV was released, shielded wires as described in Patent Document 1 below were used as HEV wire harnesses. As shown in FIG. 10A, the shielded electric wire 100 has a structure in which the periphery of the core wire 101 that is a conductor is covered with an insulating inner skin 102, a braided wire 13, and a sheath 14 in this order.

  When the shielded electric wire 100 is used for a wire harness, as shown in FIG. 10A, first, the sheath 104, the braided wire 103, and the inner skin 102 are peeled in order, and the braided wire 103, the inner skin 102, and the core wire 101 are respectively removed. After the operation of exposing the end of the sheath 104, as shown in FIG. 10 (b), the annular waterproof shield 105 is put on a region near the end of the outer periphery of the sheath 104, and the outer periphery of the end of the sheath 104 is further covered. Cover the shield shell 106.

  Next, the braided wire 103 is folded back to cover the outer periphery of the shield shell 106, and the core wire 101 is fitted into the cylindrical caulking portion 107a of the round terminal 107 as shown in FIG. An annular connecting portion 107b is provided at a connecting portion of the round terminal 107 with the electric wire on the device side.

  Then, as shown in FIG. 10 (d), the braided wire 103 protruding from the outer periphery of the sheath 104 of the shielded electric wire 100 is connected to the inner peripheral surface of the substantially cylindrical conductive shield case 111 and insulated. The structure is covered with a female housing 112. A flange portion 113 that contacts the wall surface of the device-side housing 115 is provided at the tip of the shield case 111. Further, the annular connecting portion 107b of the round terminal 117 is disposed so as to protrude from the flange portion 113 to the outside.

  The shield case 111 and the female housing 112 to which the shielded electric wire 100 is attached are attached to the device-side housing 115. Further, the connection portion 107b of the round terminal 117 arranged through the terminal through hole 115a in the device-side housing 115 is connected to a terminal 120 connected to a device-side electric wire (not shown) by a bolt 121 and a nut 122.

  Thus, shield performance is secured by assembling the braided wire 103 and the shield case 111 so as to be electrically connected by terminal processing of the shielded electric wire 100 serving as a wire harness.

  However, such work is time consuming and increases the number of parts, which increases the cost.

  Therefore, in recent years, as described in Patent Document 2, two or three non-shielded covered electric wires are used instead of shielded electric wires, and a structure in which they are surrounded by a cylindrical braided wire has been adopted. ing.

  As shown in FIG. 11, the wire harness uses a covered electric wire 130 having a structure in which a core wire is covered with a sheath without having a braided wire, and after connecting a connector 131 to the end of the covered electric wire 130, Three covered electric wires 130 are bundled and collectively enclosed in a cylindrical braided wire 132, and a shield shell 133 is attached to the end of the cylindrical braided wire 132. It has a structure to do. Further, as a structure for attaching the cylindrical braided wire 132, the cylindrical braided wire 132 is directly fixed to the shield case (not shown) using a metal clamp (not shown) without using the shield shell 133. A method may be adopted.

By adopting such a structure that ensures shielding performance, workability is improved and the number of parts can be reduced.
Japanese Patent Laid-Open No. 11-126656 Japanese Patent Laid-Open No. 2004-172008

  However, when the structure as shown in FIG. 11 is adopted, it is necessary to expand the width of the tubular braided wire 132 at the portion where the shield shell 133 is attached, and the density of the conductive wire 134 constituting the braided wire 132 is reduced. Shield performance will be reduced.

  In contrast, a long narrow tapered portion (not shown) is formed in a portion of the shield shell 133 where the braided wire 132 is fixed, and the braided wire 132 attached to the outer periphery of the iris is held by a metal clamp (not shown). Thus, there is a structure in which the extended portion at the end of the braided wire 132 is reduced. However, such a shield case is disadvantageous in that the length of the shield case is increased by the amount of the narrowed portion, and the heat dissipation performance of the covered wire 130 is deteriorated by bundling a plurality of 130 covered wires at the narrowed portion.

  An object of the present invention is to provide a wire harness that has shielding performance, is easy to process a terminal, and has an excellent heat dissipation effect.

  A first aspect of the present invention for solving the above problems includes a female terminal connected to an electric wire, a part of the electric wire and a cylindrical female terminal accommodating portion for accommodating the female terminal, and a plurality of the female terminals. A cylindrical housing braided wire that covers the electric wires while maintaining the mutual spacing between the female housings in which the female terminal storage portions are arranged substantially in parallel at a predetermined pitch and the plural electric wires exposed from the plural female housings And a shield cover that covers the outer periphery of the female housing and a part of which is covered by the end of the braided wire, a male terminal connected to the female terminal, and a male housing that houses the male terminal. This is a characteristic wire harness.

  According to a second aspect of the present invention, in the wire harness according to the first aspect, the shield braided wire has a structure that covers the whole of the plurality of electric wires by one. .

  According to a third aspect of the present invention, in the wire harness according to the second aspect, outside the female housing, a plurality of the electric wires are provided with spacers that maintain the spacing.

  According to a fourth aspect of the present invention, in the wire harness according to the second aspect, the shield braided wire is covered with a protective cover having a protruding portion protruding in a region between the plurality of the electric wires. It is characterized by.

  According to a fifth aspect of the present invention, in the wire harness according to the first aspect, a plurality of the braided wires for shielding are used to individually cover a plurality of the electric wires.

  According to the present invention, the female housing is provided with a plurality of female terminal storage portions substantially in parallel, and the respective female terminals attached to the ends of the plurality of electric wires are inserted into the plurality of female terminal storage portions, and between the electric wires. Since the interval is held outside the female housing, the plurality of electric wires are arranged while maintaining the interval therebetween, and the heat dissipation is improved.

  Further, since it is not necessary to provide a portion for bundling a plurality of electric wires in the female housing, the size can be reduced.

  Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.

(First embodiment)
FIG. 1 is a plan view showing a state in which a female terminal is attached to a covered electric wire constituting the wire harness according to the first embodiment of the present invention, and FIG. 2 is a covered electric wire in the wire harness according to the first embodiment of the present invention. Sectional drawing which shows the state which attached the female terminal connected to to the female housing, FIG. 3 is an end view of the female housing of the wire harness according to the first embodiment of the present invention.

  The covered electric wire 1 shown in FIG. 1 has a structure in which the outer periphery of a conductive core wire 1a is covered with an insulating sheath 1b. Further, the end portion of the core wire 1a exposed by peeling off the end portion of the sheath 1b in the covered electric wire 1 is inserted into a substantially cylindrical caulking portion 2a provided at one end of the female terminal 2 and fixed by caulking. .

  A claw portion 2c is formed on both sides of the male terminal connection portion 2b provided at the other end of the female terminal 2, and the claw portion 2c has a structure folded to the upper surface side of the male terminal connection portion 2b. The female terminal 2 and the end of the covered electric wire 1 connected to the female terminal 2 are mounted in a female housing 3 shown in FIG. The female terminal 2 is made of a metal having good conductivity such as aluminum or copper.

  The female housing 3 includes a main body 4 in which three cylindrical female terminal storage portions 4a, 4b, and 4c into which end portions of the female terminal 2 and the covered electric wire 1 are inserted are formed in parallel and at a narrow pitch, and an outer periphery of the main body 4 The flange portion 5 is formed and faces the device-side housing to be attached, and these are integrally formed of an insulating resin.

  Of the three female terminal storage portions 4a, 4b, and 4c, the portions on the side where the female terminal 2 appears with the flange portion 5 as a boundary have a gap between them, on the opposite side and the side where the covered wire 1 is exposed. The parts are formed integrally.

  In addition, a resin-made annular wire seal 6 covering the outer periphery of the sheath 1b is fitted into a portion where the end portion of the sheath 1b of the covered electric wire 1 is located inside the cylindrical female terminal storage portions 4a, 4b, 4c. The wire seal 6 is positioned by a step portion 4d formed on the inner peripheral surface of the female terminal storage portions 4a, 4b, 4c.

  Further, inside the female terminal storage portions 4a, 4b, 4c, a resin-made cylindrical cap 7 is fitted into an end portion on the side where the covered electric wire 1 appears, and the cap 7 is a flange that comes into contact with the end portion. It has a portion 7a.

  Male terminal insertion holes 8a, 8b, and 8c are formed at the ends of the female terminal storage portions 4a, 4b, and 4c where the tip of the female terminal 2 is located.

  Region of the main body 4 of the female housing 3 as described above from the outer peripheral surface of the female terminal storage portion end 4a, 4b, 4c on the side where the covered electric wire 1 is exposed to one surface and the peripheral surface of the flange portion 5 adjacent thereto. Is covered with a shield cover 10 made of a conductive material such as aluminum or copper.

  Further, a part of the outer peripheral portion of the main body of the shield cover 10 is covered with an end of a shielded braided wire 11 covering the whole of the three covered electric wires 1, and the end of the braided wire 11 is made of metal. It is sandwiched between clamps 12 made of metal and fixed to the shield cover 10. The braided wire 11 has a configuration in which flexible conductive wires such as copper, tin-plated copper, and aluminum are knitted.

  A groove 9 into which the waterproof packing is fitted is formed on the surface of the flange portion 5 of the female housing 3 that is not covered by the shield cover 10, that is, the surface that contacts the device-side housing, as shown in FIG. ing. In FIG. 3, reference numeral 5a denotes an attachment hole.

  As shown in FIG. 4, the female housing 3 has a structure that is detachably fitted into the male housing 20.

  The male housing 20 includes a main body 21 to be fitted into the connector mounting hole 31 of the device-side housing 30 and three recesses into which the end on the side where the tip of the female terminal 2 is positioned is fitted among the female terminal storage portions 4a, 4b and 4c. 22a, 22b, and 22c. The male terminal 23 is penetrated by the through-hole 31 of each recessed part 22a, 22b, 22c, respectively.

  Of the male terminal 23, the female terminal connection portion 23a protruding into the recesses 22a, 22b, and 22c of the male housing 20 passes through the male terminal insertion holes 8a, 8b, and 8c of the female terminal storage portions 4a, 4b, and 4c. It has the width | variety pinched | interposed between the terminal connection part 2b and the nail | claw part 2c. In addition, the external wiring connection portions 8a, 8b, and 8c that protrude from the male housing 20 of the male terminal 23 are formed wider than the male terminal connection portion 2b and can be easily connected to external wiring (not shown). Is formed.

  In the wire harness described above, the female housing 3 is provided with three female terminal storage portions 4a, 4b, 4c substantially in parallel, and each female terminal 2 attached to the end of the three covered electric wires 1 is provided with three female terminals. Since it inserts in storage part 4a, 4b, 4c and hold | maintains the space | interval of the covered electric wire 1 on the exterior of the female housing 3, the covered electric wire 1 is arrange | positioned, maintaining a mutual space | interval, and heat dissipation And the accumulation of heat generated when a current is passed through the covered electric wire 1 is prevented.

  Further, since it is not necessary to provide the female housing 3 with a portion for bundling the three covered electric wires 1, the size can be reduced.

  By the way, when the contraction force of the tubular braided wire 11 is strong, there is a possibility that the three covered electric wires 1 come into contact with the outside of the female housing 3 to deteriorate the heat dissipation. In such a case, spacers 25 as shown in FIG. 5 are attached to a plurality of locations of the three covered electric wires 1 outside the female housing 3 in order to improve heat dissipation, or the braided wire 11 is shown in FIG. You may make it the structure covered with the cylindrical protective cover 28 as shown.

  The spacer 25 shown in FIG. 5 uses two corrugated members 26 having three concave portions 25a, 25b, and 25c into which the covered electric wire 1 is fitted at a predetermined pitch, so that the concave portions 25a, 25b, and 25c are opposed to each other, and both ends are screws 27. It has a structure to stop at. As a result, the three covered electric wires 1 are sandwiched between the different recesses 25a, 25b, and 25c, respectively, and are kept at a predetermined pitch to prevent deterioration in heat dissipation. The arrangement of the spacers 25 may be either inside or outside the braided wire 11.

The cylindrical protective cover 28 shown in FIG. 6 is made of resin, and convex portions 28a and 28b that enter between the covered electric wires 1 surrounded by the offset wire 11 are formed in the cylindrical protective cover 28. 28b prevents the covered electric wires 1 from approaching each other, maintains a predetermined pitch, and prevents deterioration of heat dissipation.
(Second Embodiment)
FIG. 7 is a cross-sectional view showing a state in which the female terminal connected to the covered electric wire is attached to the female housing in the wire harness according to the second embodiment of the present invention, and FIG. 8 shows the wire according to the second embodiment of the present invention. It is an end view of the female housing of a harness. 7 and 8, the same reference numerals as those in FIGS. 1 and 2 denote the same elements.

  The female housing 3 shown in FIG. 7 includes a cylindrical female terminal storage portion 4a, 4b, 4c into which the tip of the female terminal 2 and the covered wire 1 is inserted, and three female terminal storage portions 4a, 4b, 4c in parallel and wide. It has a flange portion 5 that keeps a distance between each other and faces the device-side housing, and is integrally formed of an insulating resin. The three female terminal storage portions 4 a, 4 b, 4 c are separated from each other by a predetermined gap at portions other than the flange portion 5.

  In the flange portion 5 of the female housing 3, as shown in FIG. 8, a groove 9 into which the waterproof packing is fitted is formed on the surface where the tip of the female terminal 2 is located.

  Moreover, the area | region from the outer peripheral surface of the edge part by which the covered electric wire 1 is exposed among each of the three female terminal accommodating parts 4a, 4b, 4c of the female housing 3 to the one surface and peripheral surface of the flange part 5 connected to this is The shield cover 10A is made of a conductive material such as aluminum or copper.

  A part of the outer peripheral area of each of the three female terminal storage portions 4a, 4b, 4c in the shield cover 10A is covered with an end portion of a cylindrical braided wire 11A that individually covers each of the three covered electric wires 1. The ends of the braided wire 11A are sandwiched between metal clamps 12A and fixed to the shield cover 10A. The braided wire 11A has a configuration in which a flexible conductive wire such as copper, tin-plated copper, or aluminum is knitted.

  In addition, a resin-made annular wire seal 6 covering the outer periphery of the sheath 1b is fitted into a portion where the end portion of the sheath 1b of the covered electric wire 1 is located inside the female terminal storage portions 4a, 4b, 4c. It is positioned by a step portion 4d formed on the inner peripheral surface of the female terminal storage portions 4a, 4b, 4c. Further, inside the female terminal storage portions 4a, 4b, and 4c, a resin-made cylindrical cap 7 is fitted into the end portion on the side where the covered electric wire 1 is exposed, and the cap 7 is connected to the female terminal storage portion 4a. , 4b, 4c have flange portions 7a that come into contact with the end faces.

  Male terminal insertion holes 8a, 8b, 8c are formed at the end of the female terminal housing 4a, 4b, 4c on the side where the male terminal connection 2b of the female terminal 2 is located.

  As shown in FIG. 9, the female housing 2 has a structure that is detachably fitted into a male housing 20 having the same structure as that of the first embodiment.

  The male housing 20 includes a main body 21 fitted in the connector mounting hole 31 of the device-side housing 30, and three concave portions 22a into which the end portions on the distal end side of the female terminal 2 out of the female terminal storage portions 4a, 4b, 4c are fitted. 22b and 22c.

  In addition, the mutual pitch of several recessed part 22a, 22b, 22c provided in the male housing 20 becomes the same as the pitch of the female terminal 2 attached to the female housing 2, and it is in the through-hole 31 of each recessed part 22a, 22b, 22c. Each has a male terminal 23 therethrough.

  In the wire harness described above, the covered electric wires 1 disposed outside the three female terminal storage portions 4a, 4b, and 4c provided at intervals on the female housing 3 side are individually covered with the braided wire 11A. Since it arrange | positions maintaining a mutual space | interval, heat dissipation improves.

  In addition, since the female housing 3 does not require a portion for bundling the three covered electric wires 1, the size can be reduced.

  By the way, in said embodiment, although the wire harness which has the three covered electric wires 1 was demonstrated, it can apply similarly to the case of two.

FIG. 1 is a plan view showing a state in which a female terminal is attached to a covered electric wire constituting the wire harness according to the first embodiment of the present invention. FIG. 2 is a cross-sectional view illustrating a state in which the female terminal connected to the covered electric wire is attached to the female housing in the wire harness according to the first embodiment of the present invention. FIG. 3 is an end view of the female housing of the wire harness according to the first embodiment of the present invention. FIG. 4 is a cross-sectional view showing the wire harness according to the first embodiment of the present invention. FIG. 5 is a perspective view showing a spacer used in the wire harness according to the first embodiment of the present invention. FIG. 6 is a cross-sectional view showing a protective cover that covers the braided wire used in the wire harness according to the first embodiment of the present invention. FIG. 7 is a cross-sectional view illustrating a state in which the female terminal connected to the covered electric wire is attached to the female housing in the wire harness according to the second embodiment of the present invention. FIG. 8 is an end view of the female housing of the wire harness according to the second embodiment of the present invention. FIG. 9 is a cross-sectional view showing a wire harness according to a second embodiment of the present invention. FIG. 10 is a side view showing a wire harness according to the first prior art. FIG. 11 is a side view showing a wire harness according to the second prior art.

Explanation of symbols

1: Covered wire 2: Female terminal 3: Female housing 4a, 4b, 4c: Female terminal storage 5: Flange 10, 10A: Shield cover 11, 11A: Braided wire 20: Male housing 23: Male terminal 25: Spacer 28 : Protective cover

Claims (5)

A female terminal connected to the wire;
A cylindrical female terminal accommodating portion for accommodating a part of the electric wire and the female terminal;
A female housing in which a plurality of female terminal storage portions are arranged substantially in parallel at a predetermined pitch;
A cylindrical shield braided wire covering the electric wires while maintaining the mutual spacing of the plurality of electric wires exposed from the plurality of female housings;
A shield cover that covers an outer periphery of the female housing and a part of which is covered by an end of the braided wire;
A male terminal connected to the female terminal;
A wire harness comprising a male housing for housing the male terminal. 2. The wire harness according to claim 1, wherein the shield braided wire has a structure that covers the entire plurality of the electric wires by one. The wire harness according to claim 2, wherein a spacer for holding the gap is attached to the plurality of electric wires outside the female housing. The wire harness according to claim 2, wherein the shield braided wire is covered with a protective cover having a convex portion protruding in a region between the plurality of electric wires. The wire harness according to claim 1, wherein a plurality of the braided wires for shielding are used to individually cover the plurality of the electric wires.

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