JP2012147509A - Wiring harness arrangement structure - Google Patents

Abstract

PROBLEM TO BE SOLVED: To reduce the weight and the cost of a wiring harness and maintain high heat radiation effect even though electric wires forming the wiring harness are layered.SOLUTION: A wiring harness arrangement structure includes multiple flat wires 11, each of which is formed by coating a conductor 12 formed by arranging multiple core wires 12a in parallel or a conductor having a rectangular cross section with a resin 13. In a region where the multiple flat wires 11 are layered, a first metal braid wire 14 is placed over at least one of outer peripheral surfaces of the flat wires 11, which are located adjacent to each other by layering, to be disposed between adjacent surfaces of the layered flat wires 11. Further, a second metal braid wire 16 is placed over an outer peripheral surface of a laminate body 15 of the flat wires 11 including the first metal braid wire 14.

Description

  The present invention relates to a wiring structure for a wire harness, and more particularly, to enhance the heat dissipation effect of a wire harness that is wired in an automobile.

As a wire harness for connecting devices such as an inverter and a motor of a hybrid vehicle or an electric vehicle, for example, Japanese Patent Laid-Open No. 2001-136632 (Patent Document 1) provides a wire harness 1 in which a plurality of round electric wires 2 are converged. (See FIG. 9).
On the other hand, as shown in FIG. 10, like the core wire of the round electric wire 2, a plurality of core wires 5 a obtained by converging a large number of metal strands are arranged in parallel to form a strip-like conductor 5. Since the coated flat cable (hereinafter referred to as a flat electric wire) 4 can be set to have a small conductor cross-sectional area with respect to the rated current value, the cost and weight can be reduced and a good heat radiation effect can be obtained. Therefore, instead of the round electric wire 2 shown in FIG. 9, it is advantageous from the viewpoint of the cost, weight reduction, and heat dissipation effect to wire the wire harness 3 in which a plurality of the flat electric wires 4 are arranged in parallel. This is effective when you want to reduce the height of the wiring space.

JP 2001-136632 A

  However, when wiring the wire harness 3 in which a plurality of the flat electric wires 4 are arranged in parallel as described above between the devices, the plurality of flat electric wires 4 are arranged in parallel in the width direction due to restrictions on the width dimension of the vehicle arrangement space. May not be able to route. In that case, it is necessary to laminate and route a plurality of flat electric wires 4 in a partial or relatively long section, but when the flat electric wires 4 are brought into contact with each other and laminated, thermal interference occurs between the contact surfaces, There is a problem that the current value that can be energized is limited due to the loss of the heat dissipation effect.

  An object of the present invention is to reduce the weight and cost of a wire harness routed in an automobile, and to maintain a high heat dissipation effect even if electric wires constituting the wire harness are laminated.

  In order to solve the above-mentioned problems, the present invention includes a plurality of flat electric wires in which a plurality of conductors in which core wires are arranged in parallel or a conductor having a rectangular cross section is covered with a resin. The first metal braided wire is interposed between adjacent surfaces of the flat electric wire to be laminated by covering the first metal braided wire on at least one outer peripheral surface of the flat electric wire, and the flat electric wire including the first metal braided wire Provided is a wire harness routing structure in which a second metal braided wire is placed on the outer peripheral surface of a laminate.

By configuring the wire harness from the flat electric wire as described above, it is possible to increase the surface area from the round electric wire and increase the heat dissipation effect, and to reduce the conductor cross-sectional area with respect to the rated current value. Electric wire cost and mass can be reduced.
Further, in the region where the flat electric wires are laminated and wired, as described above, at least one outer peripheral surface of the adjacent flat electric wires is covered with the first metal braided wire and laminated between the adjacent surfaces of the flat electric wires laminated. The first metal braided wire is interposed, and the second metal braided wire is covered on the outer peripheral surface of the laminate of the flat electric wires including the first metal braided wire. Therefore, the first metal braided wire secures a certain gap between the adjacent flat wires, prevents contact between the flat wires that hinders heat dissipation, and the metal braided wire has high thermal conductivity. The braided wire releases heat generated from the flat electric wire to the second metal braided wire on the outer peripheral side, and further, the second metal braided wire releases the heat to the outside, forming an efficient heat dissipation route and high heat dissipation. The effect can be retained. Moreover, since the metal braided wire is mesh-shaped and has a large number of openings, the space between the adjacent surfaces of the flat electric wire with the first metal braided wire interposed therebetween is not sealed. Therefore, the heat generated from the flat electric wire can be easily released to the outside through the openings of the first and second metal braided wires, and the heat dissipation effect can be further enhanced.

  Further, since the flat electric wires to be laminated are covered with the first metal braided wire and the second metal braided wire to increase the braided wire density, the shielding performance against electromagnetic noise from the outside can be further enhanced. In addition, as described above, the flat wire is covered with the first metal braided wire, and the laminate of the flat wire is covered with the second metal braided wire so that the flat wire and the first and second metal braided wires are in close contact with each other. Therefore, it is more effective for surge countermeasures. Furthermore, since the electrostatic capacity is increased by the first and second metal braided wires, it is possible to suppress unevenness of the shared voltage in the connected device.

  The first and second metal braided wires are preferably provided continuously in the length direction of the flat electric wire in a region where laminated wiring is required. Since the first and second metal braided wires have flexibility, the flexibility of the wire harness is not impaired even if the first and second metal braided wires are continuously attached in the length direction of the flat electric wires to be laminated. The first and second metal braided wires can be formed by knitting a large number of metal strands made of, for example, tin-plated annealed copper wire, and the thickness of the metal strands forming the first and second metal braided wires is flat to be laminated. It can be set as appropriate in consideration of the space between the wires, the required heat dissipation effect, shield performance, surge resistance, and the like.

  On the outer periphery of the second metal braided wire that covers the outer peripheral surface of the laminate of the plurality of flat electric wires, a mesh tube made of a resin molded product or a corrugated tube in which peaks and valleys are alternately provided in the length direction is provided. It is preferable to have an exterior.

By using the mesh tube provided with a large number of mesh holes as the exterior material, the heat in the tube can be effectively released to the outside. Further, since the mesh tube is lightweight, it does not affect the weight of the wire harness. As resin which forms a mesh tube, resin, such as nylon (NY), polyethylene (PE), polypropylene (PP), is preferable, for example.
In addition, by using a corrugated tube in which peaks and valleys are alternately provided in the length direction as an exterior material, parts such as fixed clamps are also stable in the corrugated tube, along with protection of the laminated flat wire inserted inside Can be installed in a state. Furthermore, if a heat radiating hole is provided with a gap in the circumferential direction of the peak portion of the corrugated tube, the air permeability in the corrugated tube can be improved and the heat in the tube can be effectively released to the outside. preferable. By providing the heat dissipation hole, the mass of the corrugated tube can also be reduced. The total area of the heat radiation holes formed in the peak portion of the corrugated tube is preferably about 10 to 30% of the total area of the peak portion.
In addition, as an exterior material, the protector which consists of a resin molded product other than the said mesh tube and a corrugated tube can also be used.

  A wiring structure of a wire harness in a hybrid vehicle or an electric vehicle, wherein three flat wires are laminated to connect an inverter and a motor, and the first metal braided wire is an outer peripheral surface of all the flat wires to be laminated Or it is preferable to cover the outer peripheral surface of the flat electric wires on both sides to be laminated or the outer peripheral surface of the flat electric wires at the intermediate position sandwiched between the flat electric wires on both sides.

The three power cables that connect the inverter and motor of a hybrid vehicle or electric vehicle have a large energization current value. Therefore, the current value that can be energized is better when connected with a wire harness that uses a flat electric wire with high heat dissipation. Since it can increase, it is preferable.
In areas where flat wires need to be stacked and wired, as described above, the outer surfaces of all three flat wires to be stacked, the outer surfaces of the flat wires on both sides, or the outer surfaces of the flat wires at intermediate positions Cover the first metal braided wire, and further cover the outer peripheral surface of the laminate of the three flat wires including the first metal braided wire with the second metal braided wire to cover the flat wire and the first and second metal braided wires. Adhesion makes it possible to significantly improve heat dissipation and increase the electrostatic capacity, so that it is possible to suppress unevenness of the shared voltage in the motor.

  The allowable current value of each flat wire is 80 to 150 amperes, the width of each flat wire is 8 to 15 mm, the thickness is 3 to 5 mm, and the wire diameter of the metal wire forming the first metal braided wire is 0.1 to 5 mm. The wire diameter of the metal wire forming the second metal braided wire is preferably about 0.1 to 0.3 mm.

  The first metal braided wire is in the form of a tube or sheet, and the flat metal wire is passed through one sheet of the first metal braided wire, and the adjacent flat wire is adjacent to the sheet-like first metal braided wire. It is preferable that the sheet-like first metal braided wire is sequentially passed through the boundary surface of the flat electric wires to be laminated while meandering.

  As described above, according to the present invention, since the wire harness is composed of the flat electric wire, the surface area can be increased from that of the round electric wire to increase the heat dissipation effect, and the conductor cross-sectional area with respect to the rated current value can be increased. Therefore, it is possible to reduce the wire cost and mass. Moreover, in the area | region which laminates | lays and wire | lays the said flat electric wire, a 1st metal braided wire is put between the adjacent surfaces of the flat electric wire which covers and laminate | stacks at least one outer peripheral surface of an adjacent flat electric wire by lamination. While interposing, it is set as the structure which covers a 2nd metal braided wire on the outer peripheral surface of the laminated body of the said flat electric wire containing this 1st metal braided wire. Accordingly, the first metal braided wire secures a constant gap between adjacent flat wires and prevents contact between the flat wires which hinders heat dissipation, and the first metal braided wire radiates heat generated from the flat wires. An efficient heat radiation route is formed in which the second metal braided wire is released to the second metal braided wire and the second metal braided wire emits the heat to the outside, so that a high heat radiation effect can be maintained. Moreover, since the 1st, 2nd metal braided wire is mesh shape and has many opening, the heat dissipation effect can be improved more.

  Further, since the flat electric wires to be laminated are covered with the first metal braided wire and the second metal braided wire to increase the braided wire density, the shielding performance against electromagnetic noise from the outside can be further enhanced. In addition, the flat electric wire is covered with the first metal braided wire, and the flat electric wire is further covered with the second metal braided wire, so that the flat electric wire and the first and second metal braided wires are brought into close contact with each other for surge countermeasures. Is more effective. Furthermore, since the electrostatic capacity is increased by the first and second metal braided wires, it is possible to suppress unevenness of the shared voltage in the connected device.

The wiring structure of the wire harness in 1st Embodiment is shown, (A) is a schematic plan view, (B) is a schematic side view of the wire harness in a corrugated tube. (A) is a schematic sectional view [A-A line sectional view of Drawing 1 (A)] of a wire harness of the field where flat electric wires are wired in parallel, and (B) of the wire harness of the field where flat electric wires are laminated and wired It is a schematic perspective view. It is a schematic perspective view of a corrugated tube. It is a schematic sectional drawing which shows the wire harness of the area | region which carries out laminated wiring of the flat electric wire in 2nd Embodiment. It is a schematic perspective view of a mesh tube. It is a schematic sectional drawing of the wire harness of the area | region which carries out laminated wiring of the flat electric wire in 3rd Embodiment. It is a schematic sectional drawing of the wire harness of the area | region which carries out laminated wiring of the flat electric wire in 4th Embodiment. It is a schematic sectional drawing of the flat electric wire used in 5th Embodiment. It is a figure which shows a prior art example. It is a figure which shows a prior art example.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.
1 to 3 show a first embodiment of the present invention.
In the present embodiment, an inverter (not shown) provided in the engine room of an electric vehicle and a motor (not shown) provided on the wheel side are connected by a wire harness 10 shown in FIG. The wire harness 10 includes three flat electric wires 11 (11A, 11B, and 11C), and electric wire side terminals (not shown) connected to device side terminals (not shown) are fixed to both ends of the flat electric wires 11. is doing. As shown in FIG. 2, the flat electric wire 11 is formed by covering a conductor 12 in which a plurality of core wires 12 a (a number of seven in this embodiment) in which a large number of metal strands are arranged in parallel is covered with a resin 13. The current value is 80 to 150 amperes (150 amperes in this embodiment), the width of each flat wire 11 is 8 to 15 mm (15 mm in this embodiment), and the thickness is 3 to 5 mm (3.5 mm in this embodiment). Yes.

As shown in FIG. 2A, the three flat electric wires 11A, 11B, and 11C are preferably arranged in parallel in the width direction. However, the three flat electric wires 11A, 11B are arranged due to the arrangement space. , There is a region where 11C must be stacked and routed. In the present embodiment, in the region L where the flat electric wires 11A, 11B, and 11C need to be laminated, the middle of the three flat electric wires 11A, 11B, and 11C to be laminated is sandwiched between the other flat electric wires 11A and 11C. A tubular first metal braided wire 14 as shown in FIGS. 1B and 2B is continuously covered in the length direction of the flat electric wire 11B on the outer peripheral surface of the flat electric wire 11B at the position. Thereby, the 1st metal braided wire 14 is interposed between the adjacent surfaces of the flat electric wires 11A and 11B to be laminated and between the adjacent surfaces of the flat electric wires 11B and 11C. Furthermore, the tube-shaped second as shown in FIGS. 1B and 2B is formed on the outer peripheral surface of the laminated body 15 of the flat electric wires 11A, 11B, and 11C including the tube-shaped first metal braided wire 14. The metal braided wire 16 is continuously covered in the length direction of the laminated body 15. In the present embodiment, the dimension between adjacent surfaces of the flat electric wires 11A, 11B, and 11C through which the first metal braided wire 14 is interposed is 0.2 mm. The wire diameter of the metal strand forming the first metal braided wire 14 is 0.2 mm, the wire diameter of the metal strand forming the second metal braided wire 16 is 0.2 mm, and the first metal braided wire 14, The second metal braided wire 16 is formed by braiding a number of metal strands made of tinned annealed copper wire into a tube shape.
On the other hand, in the region where the flat electric wires 11A, 11B, and 11C are arranged in parallel in the width direction, the second metal braided wire 16 is covered on the outer peripheral surface of the parallel body of the flat electric wires 11A, 11B, and 11C as shown in FIG. ing.

  On the outer periphery of the second metal braided wire 16 covering the outer peripheral surface of the laminate 15 of the three flat electric wires 11A, 11B, and 11C, as shown in FIG. The resin corrugated tube 17 provided on the exterior is packaged. A heat radiating hole 18a is provided at an interval in the circumferential direction of the peak portion 18 of the corrugated tube 17 so as to increase the air permeability in the corrugated tube 17 so that the heat in the tube 17 can be effectively released to the outside. The total area of the heat radiating holes 18 a is about 10 to 30% of the total area of the mountain portions 18.

  As described above, in this embodiment, since the wire harness 10 is composed of the flat electric wires 11 (11A, 11B, and 11C), the surface area can be increased from that of the round electric wires, and the heat dissipation effect can be enhanced. Since the conductor cross-sectional area can be reduced with respect to the current value, the wire cost and mass can be reduced. Further, in the region L where the flat electric wires 11A, 11B, and 11C are laminated and wired, the first metal braid is formed on one outer peripheral surface of the flat electric wires adjacent to each other by lamination (in this embodiment, the outer peripheral surface of the flat electric wire 11B at the intermediate position). The first metal braided wire 14 is interposed between the adjacent surfaces of the flat electric wires 11A and 11B and the flat electric wires 11B and 11C that are laminated by covering the wire 14, and the flat electric wire 11A includes the first metal braided wire 14 11B, 11C, the outer peripheral surface of the laminate 15 is covered with the second metal braided wire 16, so that there is a constant gap between the adjacent flat wires 11A-11B and 11B-11C by the first metal braided wire 14. The flat metal wires 14A, 11B, and 11C can be secured while preventing contact between the flat wires that hinder heat dissipation. An efficient heat dissipation route is formed in which the generated heat is released to the second metal braided wire 16 on the outer peripheral side, and the second metal braided wire 16 releases the heat to the outside, thereby maintaining a high heat dissipation effect. be able to. Moreover, since the 1st, 2nd metal braided wires 14 and 16 are mesh-shaped and have many opening, the heat dissipation effect can be improved more.

  Furthermore, since the flat electric wires 11A, 11B, and 11C to be laminated are covered with the first metal braided wire 14 and the second metal braided wire 16 to increase the braided wire density, the shielding performance against electromagnetic noise from the outside is further enhanced. Can do. Further, the flat metal wire 11B at the intermediate position is covered with the first metal braided wire 14, and the laminated body 15 of the flat electric wires 11A, 11B, and 11C is covered with the second metal braided wire 16 so that the flat electric wires 11A, 11B, and 11C Since the 1st, 2nd metal braided wires 14 and 16 are stuck, it is effective also in surge countermeasures. Furthermore, since the electrostatic capacity is increased by the first and second metal braided wires 14 and 16, nonuniformity of the shared voltage in the motor can be suppressed.

4 and 5 show a second embodiment.
In 2nd Embodiment, as shown in FIG. 4, among the three flat electric wires 11A, 11B, and 11C of the lamination | stacking state which comprises the wire harness 20, it is tubular on the outer peripheral surface of the flat electric wires 11A and 11C on both upper and lower sides. The first metal braided wire 24 (24A, 24B) is continuously covered in the length direction of the flat electric wires 11A, 11C, and the first metal braided wire 24A is connected between adjacent surfaces of the flat electric wires 11A, 11B to be laminated. A first metal braided wire 24B is interposed between adjacent surfaces of 11B and 11C. Further, a mesh tube 27 made of a resin molded product as shown in FIG. 5 is provided on the outer periphery of the second metal braided wire 26 that covers the outer peripheral surface of the laminate 25 of the three flat electric wires 11A, 11B, and 11C. Yes. The mesh tube 27 is made of a resin such as nylon (NY), polyethylene (PE), or polypropylene (PP), and is formed by braiding the resin thread 29 in a spiral shape so that a diamond-shaped mesh hole 28 is formed. . By using a mesh tube 27 provided with a large number of mesh holes 28 as an exterior material of the laminated body 25, heat in the mesh tube 27 can be effectively released to the outside. Except for the points described above, the second embodiment is the same as the first embodiment.

Also in the second embodiment, a high heat dissipation effect can be obtained as in the first embodiment, and the shielding property can be improved. It is also effective for surge countermeasures, and unevenness of the shared voltage in the motor can be suppressed.
In the first and second embodiments, the corrugated tube 17 and the mesh tube 27 are used as exterior materials for the laminates 15 and 25 of the flat electric wires 11A, 11B, and 11C. A protector having a circular cross section can also be used. Moreover, you may cover the outer peripheral surface of all the flat electric wires 11A, 11B, and 11C which laminate | stack the 1st metal braided wire 14. FIG.

FIG. 6 shows a third embodiment.
In the third embodiment, the first metal braided wire has a sheet shape. That is, as shown in FIG. 6, the sheet-shaped first metal braided wire 34 (34 </ b> A) is formed between the adjacent surfaces of the laminated flat wires 11 </ b> A and 11 </ b> B and the adjacent surfaces of the flat wires 11 </ b> B and 11 </ b> C. , 34B). The 2nd metal braided wire 36 covered on the outer peripheral surface of the laminated body 35 of the three flat electric wires 11A, 11B, and 11C is made into a tube shape like the first and second embodiments.

FIG. 7 shows a fourth embodiment.
Also in the fourth embodiment, the first metal braided wire is formed in a sheet shape as in the third embodiment. However, as shown in FIG. 7, between adjacent surfaces of the flat electric wires 11B and 11C in the laminated state constituting the wire harness 40. In addition, the sheet-like first metal braided wire 44 is sequentially passed between adjacent surfaces of the flat electric wires 11A and 11B while meandering. The 2nd metal braided wire 46 covered on the outer peripheral surface of the laminated body 45 of the three flat electric wires 11A, 11B, and 11C is made into a tube shape like the first, second, and third embodiments.

  Also in the third and fourth embodiments, a high heat dissipation effect can be obtained as in the first and second embodiments, and the shielding performance can be improved. It is also effective for surge countermeasures, and unevenness of the shared voltage in the motor can be suppressed.

FIG. 8 shows a fifth embodiment.
In the fifth embodiment, as shown in FIG. 8, the conductor of each flat wire 51 is formed by one conductor 52 having a rectangular cross section, and the conductor 52 is covered with a resin 53. The single conductor 52 may be formed by converging a large number of metal wires, formed by integrating strip-shaped metal foils, or formed by a thick metal plate.

10, 20, 30, 40 Wire harness 11, 51 Flat wire 12, 52 Conductor 13, 53 Resin 14, 24, 34, 44 First metal braided wire 15, 25, 35, 45 Laminated body 16, 26, flat wire, 36, 46 Second metal braided wire 17 Corrugated tube 18 Mountain portion 19 Valley portion 27 Mesh tube

Claims (4)

  A plurality of flat electric wires in which a plurality of conductors in which core wires are arranged in parallel or a conductor having a rectangular cross section are coated with a resin are provided, and in the region where the plurality of flat electric wires are laminated, a first is formed on at least one outer peripheral surface of the adjacent flat electric wires by the lamination. The first metal braided wire is interposed between adjacent surfaces of the flat electric wires to be laminated and covered with a metal braided wire, and the second metal braided wire is disposed on the outer peripheral surface of the laminate of the flat electric wires including the first metal braided wire. The wiring structure of the wire harness characterized by covering.   A mesh tube made of a resin molded product or a corrugated tube in which crests and troughs are alternately provided in the length direction is provided on the outer periphery of the second metal braided wire that covers the outer peripheral surface of the laminate of the plurality of flat electric wires. The wiring structure of the wire harness according to claim 1.   A wiring structure of a wire harness in a hybrid vehicle or an electric vehicle, wherein three flat wires are laminated to connect an inverter and a motor, and the first metal braided wire is an outer peripheral surface of all the flat wires to be laminated Or the wiring structure of the wire harness of Claim 1 or Claim 2 which covers the outer peripheral surface of the flat electric wire of the both sides laminated | stacked, or the outer peripheral surface of the flat electric wire of the intermediate position pinched | interposed into the flat electric wire of the said both sides.   The first metal braided wire is in the form of a tube or sheet, and the flat metal wire is passed through one sheet of the first metal braided wire, and the adjacent flat wire is adjacent to the sheet-like first metal braided wire. The wiring structure of the wire harness according to any one of claims 1 to 3, wherein the wiring structure is sequentially passed through a boundary surface of flat electric wires that are sandwiched between layers or laminated while meandering the sheet-like first metal braided wire. .

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