JP2012152064A - Arrangement structure of wiring harness - Google Patents

Abstract

PROBLEM TO BE SOLVED: To reduce the weight and the cost of a wiring harness arranged in a vehicle and maintain high heat radiation effect even though electrical wires forming the wiring harness are layered.SOLUTION: A wiring harness arrangement structure includes multiple flat wires 11A, 11B, 11C, 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. In a region L where the multiple flat wires 11A, 11B, 11C are layered and arranged, protectors 15, each of which is provided with partition walls 16d, 16e disposed on its inner surface, are attached continuously or having a gap therebetween in the length direction of a laminated body 14 of the flat wires 11A, 11B, 11C. The partition walls 16d, 16e are respectively disposed between adjacent surfaces of the laminated flat wires 11A, 11B, 11C.

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. 6).
On the other hand, as shown in FIG. 7, similarly to 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. 6, it is advantageous from the viewpoint of the cost and weight reduction and the heat radiation effect to wire the wire harness 3 in which the flat electric wires 4 are arranged in parallel between the devices. This is effective when you want to reduce the height of the routing space.

JP 2001-136632 A

  However, when wiring the wire harness 3 composed of a plurality of flat electric wires 4 between the devices, the plurality of flat electric wires 4 cannot be arranged in parallel in the width direction due to restrictions on the width dimension of the vehicle arrangement space. There is. 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 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 coated with a resin, and a partition wall is provided in an area where the plurality of flat electric wires are laminated and wired. The protector provided on the inner surface is attached continuously or at intervals in the length direction of the laminate of the flat electric wires, and the partition is interposed between adjacent surfaces of the flat electric wires to be laminated. A wiring harness wiring structure is provided.

By forming 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 enhance 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.
Moreover, in the area | region which laminates and wire | lays a several flat electric wire, it is set as the structure which attaches the protector which provided the partition provided on the inner surface between the adjacent surfaces of the flat electric wire to laminate | stack to the laminated body of a flat electric wire. Therefore, the flat electric wires laminated by the protector can be protected from external interference materials, and a certain distance is secured between the flat electric wires laminated by the partition walls of the protector, thereby preventing contact between the flat electric wires that hinders heat radiation. High heat dissipation effect can be maintained.

  By attaching the protector continuously in the length direction of the laminated body of flat electric wires, the flat electric wires can be reliably protected from external interference materials. On the other hand, when wiring in a region with a small amount of external interference material, the protector may be attached at intervals in the length direction of the flat wire laminate.

  The protector comprises a resin protector main body and a lid, and the protector main body connects one end of an upper wall and a lower wall extending in the length direction of the laminated flat wires in a U-shaped cross section at the side wall. And at least one partition wall projecting in parallel to the upper wall and the lower wall from an intermediate position of the inner surface of the side wall, and between the other ends of the upper wall and the lower wall facing the side wall It is preferable that the lid is closed.

  The protector body constituting the protector has at least one partition wall interposed between adjacent surfaces of the flat electric wires to be laminated, protruding from the inner surface of the side wall connecting one end of the upper and lower walls of the protector body in a U-shaped cross section, The other end of the upper and lower walls facing the side wall is open. Accordingly, the flat electric wires to be stacked can be simultaneously accommodated in the protector body from the side open side facing the side wall, and the partition can be interposed between adjacent surfaces of the flat electric wires. By simply closing the other end of the wall with a lid, the attachment of the protector to the laminate of flat wires can be easily completed.

  The protector main body and the lid constituting the protector are preferably made of a resin as described above, and particularly preferably made of a thermoplastic resin such as polypropylene (PP), polyethylene (PE), and polyamide (PA). .

  The protector body and the lid body are extrusion molded products, the lid body is placed on the protector body housing the laminated flat electric wires, and the protector body and the lid body are fixed with tape. Is preferred.

As mentioned above, a protector can be manufactured in a low cost and in a short time by adopting a structure in which the protector main body and the lid are formed by extrusion and are fixed by tape winding. The protector consisting of the protector body and lid of the extruded product is particularly useful when the area where the flat wires are laminated and wired is straight, but the area where the flat wires are laminated and wired is bent. However, if there is no problem of external interference, cut the protector body and lid of the extruded product into short lengths, and attach them to the required locations of the flat wire laminate to be bent. Is also possible.
On the other hand, when the area where the flat electric wires are laminated and wired has a complicated shape, and the protector needs to be attached over the entire length of the laminated body in the area, For example, when the structure is fixed by locking the lock portion with the locked portion, it is also preferable to manufacture the protector body and the lid body by injection molding. In order to further improve the heat dissipation, a heat dissipation hole may be provided in the protector body and / or the lid.

  A wiring structure of a wire harness in a hybrid vehicle or an electric vehicle, in which three flat wires are stacked to connect an inverter and a motor, and a first partition wall and a second partition wall are connected to the inner surface of the side wall of the protector body. The partition wall is provided with an interval between the upper wall of the protector body and the first partition wall facing the upper wall. A flat wire on the lower surface side of the laminated flat wires is accommodated between the lower wall of the protector body and the second partition facing the lower wall, and further, the first partition and the second partition It is preferable that a flat electric wire at an intermediate position among the flat electric wires to be stacked is accommodated between the flat electric wires.

  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 the region where the flat electric wires are laminated and wired, as described above, the flat electric wires on the upper surface side to be laminated are placed between the upper wall of the protector body and the first partition wall, and the flat electric wires on the lower surface side to be laminated are arranged on the protector main body. Between the lower wall and the second partition, the flat wires at the intermediate positions to be stacked are accommodated between the first partition and the second partition, thereby preventing contact between the flat wires and high heat dissipation. Sex can be maintained.

  A metal braid is provided on the outer peripheral surface of the flat wire accommodated between the upper wall and the first partition, between the lower wall and the second partition, and between the first partition and the second partition. It is preferable to cover the line.

  As described above, by covering the outer peripheral surface of each flat electric wire to be laminated with the metal braided wire, it is possible to improve the shielding property against electromagnetic noise from the outside. Further, each flat electric wire covered with the metal braided wire is accommodated between the upper wall and the first partition, between the lower wall and the second partition, and between the first partition and the second partition. An electric wire and a metal braided wire can be brought into close contact with each other, which is also effective for surge countermeasures.

The metal braided wire can be formed by braiding a number of metal strands made of, for example, tin-plated annealed copper wire, and the outer peripheral surface of the three flat electric wires to be laminated is continuous in an E-shaped cross section with the metal braided wire. It is preferable to be accommodated in the protector main body in a state where it is covered with.
It is preferable that the allowable current value of each flat electric wire to be laminated is 30 to 100 amperes, the width of each flat electric wire is 8 to 17 mm, and the thickness is 2 to 10 mm. Further, the distance between adjacent surfaces of the flat electric wire with the first and second partition walls interposed is 0 to 3 mm, the thickness of the first and second partition walls is 2 to 10 mm, and the metal strand forming the metal braided wire The thickness is preferably 0.1 to 1 mm.

As described above, according to the present invention, since the wire harness is formed from the flat electric wire, the surface area can be increased from 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 and wire | lays a flat electric wire, it is set as the structure which attaches the protector which provided the partition provided on the inner surface between the adjacent surfaces of a flat electric wire to the laminated body of the said flat electric wire. Therefore, the flat electric wires laminated by the protector can be protected from external interference materials, and a certain distance is secured between the flat electric wires laminated by the partition walls of the protector, thereby preventing contact between the flat electric wires that hinders heat radiation. High heat dissipation effect can be maintained.

  According to the present invention, the protector comprises a protector body and a lid, and at least one partition wall protrudes from the inner surface of the side wall that connects one end of the upper wall and the lower wall of the protector body in a U-shaped cross section. The other end of the upper and lower walls facing the side wall is open. Therefore, the flat electric wires laminated from the side open side can be accommodated in the protector body at the same time, and the partition can be interposed between the adjacent surfaces of the flat electric wires. The attachment of the protector to the laminated body of the flat electric wires can be easily completed simply by closing with the lid.

It is a top view which shows the wiring structure of the wire harness in 1st Embodiment. (A) is sectional drawing which shows the wire harness of the area | region which carries out the parallel wiring of the flat electric wire [AA line sectional drawing of FIG. 1], (B) is a perspective view which shows the wire harness of the area | region which carries out laminated wiring of the flat electric wire. It is. It is a disassembled perspective view of a protector. It is a top view which shows the wiring structure of the wire harness of the area | region which carries out laminated wiring of the flat electric wire in 2nd Embodiment. It is sectional drawing of the flat electric wire used by 3rd 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 1st Embodiment, the inverter provided in the engine room of the electric vehicle and the motor (not shown) provided in the wheel side are connected by the wire harness 10 shown in FIG. The wire harness 10 is formed of three flat electric wires 11A, 11B, and 11C, and electric wire side terminals (not shown) connected to device side terminals (not shown) are connected to both ends of the flat electric wires 11A, 11B, and 11C. It is stuck. As shown in FIG. 2, the flat electric wires 11A, 11B, and 11C cover the conductors 12 in which a plurality of core wires 12a (7 in this embodiment) in which a large number of metal strands are converged (in this embodiment) are covered with a resin 13, The allowable current value of the flat wires 11A, 11B, and 11C is 30 to 100 amperes (70 to 100 amperes in this embodiment), the width of each flat wire 11 is 8 to 17 mm (15 mm in this embodiment), and the thickness is 2 to 2 amperes. 10 mm (3.5 mm in this embodiment).

  The three flat electric wires 11A, 11B, and 11C are preferably wired in parallel in the width direction as shown in FIG. 2A. However, as shown in FIG. There is a region where the flat electric wires 11A, 11B, and 11C must be laminated and wired. In the present embodiment, in the region L in which the flat electric wires 11A, 11B, and 11C need to be laminated, the laminated body 14 of the flat electric wires 11A, 11B, and 11C, as shown in FIG. 1, FIG. 2 (B), and FIG. The protector 15 is continuously attached in the length direction. Note that the laminated wiring region L of the present embodiment has a linear shape.

The protector 15 includes a protector main body 16 and a lid body 17 of an extrusion-molded product as shown in FIG. 3, and these are formed of a thermoplastic resin such as polypropylene (PP), polyethylene (PE), and polyamide (PA). Yes.
The protector body 16 includes an upper wall 16a and a lower wall 16b that extend in the length direction of the flat electric wires 11A, 11B, and 11C to be stacked, and ends 16a-1 and 16b-1 of the upper wall 16a and the lower wall 16b. The side wall 16c is connected in a U-shaped cross section. Further, a first partition wall 16d and a second partition wall 16e that are interposed between adjacent surfaces of the flat electric wires 11A, 11B, and 11C to be laminated protrude from an intermediate position at an equal interval on the inner surface of the side wall 16c and face the side wall 16c. An opening is formed between the other ends 16a-2 and 16b-2 of the upper wall 16a and the lower wall 16b. The first partition 16d faces the upper wall 16a, while the second partition 16e faces the lower wall 16b, and the first partition 16d and the second partition 16e are provided in parallel to the upper wall 16a and the lower wall 16b. .

  The lid 17 is a plate-like body having a rectangular cross section that closes the opening between the other ends 16a-2 and 16b-2 of the upper and lower walls 16a and 16b of the protector body. After the laminated flat electric wires 11A, 11B, and 11C are accommodated in the protector body 16, the lid body 17 is fitted into the opening on the side of the protector body 16 and closed, and then the protector body 16 and the lid are wound by tape winding (T). The body 17 is integrated.

Hereinafter, attachment of the protector 15 to the laminated body 14 of the flat electric wires 11A, 11B, and 11C will be described.
First, the flat electric wires 11A, 11B, and 11C laminated in the laminated wiring region L are covered with a continuous metal braided wire 18 so as to surround the E-shaped cross section, and the metal braided wire 18 covers the outer peripheral surface. The laminated body 14 of the electric wires 11 </ b> A, 11 </ b> B, 11 </ b> C is accommodated in the protector main body 16 of the protector 15. Specifically, the flat wire 11A on the upper surface side of the laminate 14 is placed between the upper wall 16a of the protector body 16 and the first partition wall 16d, and the flat wire 11C on the lower surface side of the laminate 14 is placed on the lower wall of the protector body 16. The flat wire 11B at the intermediate position of the laminate 14 is accommodated between the first partition 16d and the second partition 16e between the first partition 16d and the second partition 16e, and the first partition 16d is placed on the upper flat wire 11A. And the second partition 16e is interposed between the adjacent surfaces of the intermediate flat wire 11B and the lower flat wire 11C.
After housing the laminated body 14 in the protector main body 16 is completed, the opening between the other ends 16a-2 and 16b-2 of the upper and lower walls 16a and 16b of the protector main body is closed with the lid body 17, and tape winding (T) Thus, the protector body 16 and the lid body 17 are integrated. Thereby, attachment of the protector 15 to the laminated body 14 of the flat electric wires 11A, 11B, and 11C is completed [FIG. 2 (B)].

  In this embodiment, the distance between adjacent surfaces of the flat electric wires 11A, 11B, and 11C with the first and second partition walls 16d and 16e interposed is 1 mm, and the thickness of the first and second partition walls 16d and 16e is 2 mm. It is said. Moreover, the thickness of the metal strand which consists of a tin plating annealed copper wire which forms the metal braided wire 18 is 0.18 mm.

As described above, since the wire harness 10 is formed from the flat electric wires 11A, 11B, and 11C in the present embodiment, the heat radiation effect can be enhanced by increasing the surface area than the round electric wires, and with respect to the rated current value. As a result, the conductor cross-sectional area can be reduced, so that the wire cost and mass can be reduced.
In the region L where the flat electric wires 11A, 11B, and 11C are laminated and wired, partition walls (first partition wall 16d and second partition wall 16e) interposed between adjacent surfaces of the flat wire wires 11A, 11B, and 11C are provided on the inner surface. Since the protector 15 is configured to be attached to the laminated body 14 of the flat electric wires 11A, 11B, and 11C, the flat electric wires 11A, 11B, and 11C laminated by the protector 15 can be protected from an external interference material, and the first A fixed distance is secured between the flat electric wires 11A, 11B, and 11C laminated by the partition wall 16d and the second partition wall 16e, and the contact between the flat wires that hinders heat dissipation can be prevented, and a high heat dissipation effect can be maintained. .

In particular, the protector 15 is composed of a protector body 16 and a lid body 17, and from the inner surface of the side wall 16 c that connects the ends 16 a-1 and 16 b-1 of the upper and lower walls 16 a and 16 b of the protector body 16 in a U-shaped cross section. The first partition wall 16d and the second partition wall 16e are projected. That is, since the protector body 16 has an open state between the other ends 16a-2 and 16b-2 of the upper and lower walls 16a and 16b facing the side wall 16c, the flat electric wire covered with the metal braided wire 18 from the side open side. 11A, 11B, and 11C can be simultaneously accommodated in the protector body 16, and the first partition 16d and the second partition 16e can be interposed between adjacent surfaces of the flat electric wires 11A, 11B, and 11C. The attachment of the protector 15 to the laminated body 14 of the flat electric wires 11A, 11B, and 11C can be easily completed simply by closing the other ends 16a-2 and 16b-2 of the walls 16a and 16b with the lid 17. .
In this embodiment, the protector 15 is attached over the entire length of the laminated body 14 of the flat electric wires 11A, 11B, and 11C in the region L to be laminated and wired, but if there is no problem of external interference, the length direction of the laminated body 14 It is also possible to attach protectors at intervals.

FIG. 4 shows a second embodiment.
In the second embodiment, the region where the flat electric wires 11A, 11B, and 11C are laminated and wired is bent as shown in FIG. 4, so that the protector body 16 and the lid body 17 of the extrusion-molded product have a predetermined length (about 2 cm). ) To form a short protector 25, and the protector 25 is attached at intervals in the length direction of the laminated body 14 of the flat electric wires 11A, 11B, and 11C. Others are the same as in the first embodiment.

  Also in the second embodiment, by attaching the protector 25 to the laminated body 14 of the flat electric wires 11A, 11B, and 11C at a required location, a certain interval is secured between the laminated flat electric wires 11A, 11B, and 11C, and heat dissipation is hindered. Therefore, it is possible to prevent contact between the flat electric wires and maintain a high heat dissipation effect.

  In the first and second embodiments, the protector main body 16 and the lid body 17 are extrusion-molded products, but the area where the flat electric wires 11A, 11B, and 11C are laminated and wired has a complicated shape, and When it is necessary to attach the protector over the entire length of the laminate, the protector body and the lid may be formed by injection molding. In the first and second embodiments, the protector body 16 and the lid body 17 are fixed by tape winding. However, the protector body 16 and the lid body 17 may be fixed by lock coupling between the lock portion and the locked portion.

FIG. 5 shows a third embodiment.
In the third embodiment, the conductor of each flat wire 21 is formed by one conductor 22 having a rectangular cross section. The single conductor 22 may be formed by converging a large number of metal wires, formed by accumulating band-shaped metal foils, or formed by a thick metal plate.

DESCRIPTION OF SYMBOLS 10 Wire harness 11A, 11B, 11C, 21 Flat electric wire 12, 22 Conductor 13 Resin 14 Laminate body 15 of flat electric wire 15, Protector 16 Protector body 16a Upper wall 16b Lower wall 16c Side wall 16d First partition 16e Second partition 17 Lid 18 Metal braided wire

Claims (5)

  In a region where a plurality of flat electric wires in which a plurality of core wires are arranged in parallel or a conductor having a rectangular cross section is coated with a resin, and the plurality of flat electric wires are laminated and wired, a protector having a partition wall provided on the inner surface is laminated on the flat electric wires. A wiring structure for a wire harness, characterized in that the partition wall is interposed between adjacent surfaces of the flat electric wires to be attached and stacked continuously or at intervals in the body length direction.   The protector comprises a resin protector main body and a lid, and the protector main body connects one end of an upper wall and a lower wall extending in the length direction of the laminated flat wires in a U-shaped cross section at the side wall. And at least one partition wall projecting in parallel to the upper wall and the lower wall from an intermediate position of the inner surface of the side wall, and between the other ends of the upper wall and the lower wall facing the side wall The wiring structure of the wire harness according to claim 1, wherein the wiring body is closed by the lid.   The protector body and the lid body are formed by extrusion, the lid body is covered with the protector body that houses the laminated flat electric wires, and the protector body and the lid body are fixed with tape. Item 3. A wiring structure for a wire harness according to Item 2.   A wiring structure of a wire harness in a hybrid vehicle or an electric vehicle, in which three flat wires are stacked to connect an inverter and a motor, and a first partition wall and a second partition wall are connected to the inner surface of the side wall of the protector body. The partition wall is provided with an interval between the upper wall of the protector body and the first partition wall facing the upper wall. A flat wire on the lower surface side of the laminated flat wires is accommodated between the lower wall of the protector body and the second partition facing the lower wall, and further, the first partition and the second partition The wiring structure of the wire harness of Claim 2 or Claim 3 which accommodates the flat electric wire of the intermediate position among the flat electric wires laminated | stacked between.   Metal braided wire on the outer peripheral surface of the flat wire accommodated between the upper wall and the first partition, between the lower wall and the second partition, and between the first partition and the second partition. The wiring structure of the wire harness according to claim 4, wherein the wiring harness is covered.

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