JP2012125079A - Distribution structure of wiring harness - Google Patents

Abstract

PROBLEM TO BE SOLVED: To enable a wiring harness composed of multiple flat wires arranged in parallel to each other to bend in a width direction of the flat wires in a reduced space.SOLUTION: A conductor 11 formed by arranging multiple core wires 11a in parallel to each other or a conductor having a rectangular cross section is covered with a resin 12 to form a flat wire 10, and the multiple flat wires 10 are arranged in parallel to each other to be installed in a vehicle with a distribution structure of a wiring harness 13. The arranged flat wires 10 are bent in a lamination state with each flat wire 10 twisted 45 to 90 degrees in a region 14 where the wiring harness 13 is installed being bent in a width direction of the flat wires 10.

Description

  The present invention relates to a wiring structure of a wire harness in which a plurality of flat electric wires are arranged side by side, and more specifically, so that the wiring harness arranged in parallel with a plurality of flat electric wires can be bent and arranged in a three-dimensional direction without bending. To do.

As a wire harness that connects devices such as an inverter and a motor of a hybrid vehicle or an electric vehicle, for example, in Japanese Patent Laid-Open No. 2001-136632 (Patent Document 1), a plurality of round electric wires 2 are converged and shield means is provided on the outer periphery thereof. There is provided a wire harness 1 to which a cylindrical metal braid 3a and an exterior material 3b such as a corrugated tube are attached (see FIG. 7).
On the other hand, as shown in FIG. 8, like the core wire of the round electric wire 2, a plurality of core wires 6 a obtained by converging a large number of metal strands are arranged in parallel to form a strip-like conductor 6. Since the coated flat cable (hereinafter referred to as a flat electric wire) 5 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 dissipation effect can be obtained. Therefore, instead of the round electric wire 2 shown in FIG. 7, a plurality of the flat electric wires 5 are arranged in parallel, and the wire harness 4 having the metal braid 8a and the flat corrugated tube 8b attached to the outer periphery thereof is routed between the devices. Is advantageous in terms of the cost, weight reduction and heat dissipation effect, and is effective when it is desired to reduce the height of the wiring space.

  However, although the round electric wire 2 is easy to bend in any direction, up, down, left, and right, the flat electric wire 5 has directionality in the bending of the electric wire, and as shown in FIG. (Small diameter direction) B has a characteristic that it is easy to bend in the width direction (major diameter direction) A of the flat electric wire 5 in which core wires are arranged in parallel, while it is easy to bend. Therefore, as shown in FIG. 9B, when it is necessary to bend and wire the wire harness 4 in which the plurality of flat electric wires 5 are arranged in parallel in the width direction (A direction) of the flat electric wires 5, The whole must be bent in such a posture as to rise in the width direction, and a wiring space having a height larger than the width of the flat electric wires for a plurality of parallel wires is required. Therefore, in a region where the wiring space is limited, there is a possibility that the wiring harness composed of a plurality of parallel flat wires cannot be bent in the flat wire width direction.

JP 2001-136632 A

  This invention makes it the subject that the wire harness which consists of a some flat electric wire paralleled in the width direction can be bent in this width direction in space-saving.

In order to solve the above-described problems, the present invention provides a wiring harness for wiring a plurality of flat electric wires in which a plurality of core wires are arranged in parallel to form a rectangular shape or a rectangular conductor having a rectangular cross section is covered with a resin. Structure,
In the region where the plurality of parallel flat wires are bent in the width direction orthogonal to the length direction, they are not connected and fixed to each other, and each flat wire is twisted by 45 to 90 degrees and bent in the laminated state in the width direction. The wiring structure of the wire harness characterized by the above is provided.

  In this invention, it is preferable to attach the parallel clamp which hold | maintains a several flat electric wire in parallel to the parallel area | region on both sides which pinches | interposes the lamination | stacking bending area | region of the said wire harness. Thereby, twisting can be easily performed in the width direction of each flat electric wire (longer diameter direction in the cross section of the conductor). Or while bending each flat electric wire and forming the said lamination | stacking bending area | region, it is preferable to fix both sides with a parallel fixing jig. In this way, both sides are connected and fixed in a parallel state, and in a region bent in the width direction, the flat wires can be separated without being connected, and the parallel flat wires can be twisted independently. I am doing so. Therefore, by twisting a plurality of parallel flat wires one by one and bending them in a stacked state, the height of the wire harness in the bent wiring region can be greatly reduced. In other words, since it can be approximately the same height as when one flat electric wire is bent in the width direction, even if there is not enough wiring space in the height direction, it consists of a plurality of parallel flat electric wires. The wire harness can be smoothly bent and wired in the width direction of the flat electric wire.

  Further, by twisting each flat electric wire 45 to 90 degrees as described above, the bending of the wire harness in the flat electric wire width direction can be changed to the bending of the laminated flat electric wire in the electric wire thickness direction. It can be bent smoothly with a radius of curvature. The twist angle is set to 45 to 90 degrees. If the twist angle is less than 45 degrees, it becomes difficult to bend the wire harness in the flat electric wire width direction, while the twist angle exceeding 90 degrees. Even if the twist angle is not twisted, it is possible to achieve the same posture by changing the twist direction and twisting at a twist angle of 90 degrees or less. It is set to 90 degrees.

  A laminate clamp made of resin or metal, in which sandwiching pieces for sandwiching the flat wires are provided at intervals, is attached to a laminate bending region in which the flat wires are twisted one by one and bent in a laminated state. It is preferable that each flat electric wire in a laminated state is held by sandwiching pieces adjacent to the laminated clamp.

  For example, in the case of a wire harness in which two flat electric wires are arranged in parallel, a laminated clamp having an E-shaped cross-section in which three clamping pieces are provided protruding at an interval is attached to the laminated bending region, and the adjacent clamps of the laminated clamps are attached. It is preferable to insert and hold the two flat electric wires in a stacked state in two spaces sandwiched between pieces. If the number of flat electric wires in parallel increases, this can be dealt with by increasing the number of clamping pieces protruding from the laminated clamp according to the number of flat wires.

  As described above, by holding each flat electric wire in a laminated state by the laminated clamp, the twist angle of each flat electric wire is fixed and the bending of the wire harness in the electric wire width direction is stabilized, and each of the laminated clamps The sandwiching piece plays the role of a spacer, and it is also possible to prevent contact between flat electric wires that hinder heat dissipation.

  An inverter and a motor of a hybrid vehicle or an electric vehicle are connected by a wire harness in which the three flat wires are arranged in parallel, and the laminated bending region of the wire harness to which the laminated clamp is attached is a parallel region of flat wires continuous on both sides. At the same time, it is preferably covered with a metal braid and further covered with a resin protector.

  The three power cables connecting the inverter and the motor have a large energization current value, and therefore it is preferable to connect with a wire harness in which flat electric wires with high heat dissipation are arranged in parallel because the energizable current value can be increased. . As described above, the metal braided body is put on the laminated bending area to which the laminated clamp is attached, along with the parallel areas continuous on both sides, and further covered with a resin protector, thereby improving the shielding performance against electromagnetic noise from the outside. In addition, the wire harness in the bent laminated region can be appropriately protected from external interference, and the wiring path in the region can be reliably regulated.

  For example, in the wireness of the present invention in which three flat wires having a width of 8 to 15 mm and a thickness of 3 to 5 mm are arranged in parallel, the height of the protector that covers the laminated bent region is reduced to 20 to 30 mm. Therefore, the wiring space can be reduced in size.

  As described above, according to the present invention, in a region where a wire harness in which a plurality of flat electric wires are arranged in parallel is bent in the width direction of the flat electric wire, the plurality of parallel electric wires are twisted one by one in a laminated state. Since it is bent, the height of the wire harness in the bent wiring area (laminated bent area) can be greatly reduced. In other words, according to the above configuration, the height can be set to the same level as when one flat electric wire is bent in the electric wire width direction, so that even if there is not enough wiring space in the height direction, the flat electric wires are arranged in parallel. A wire harness composed of a plurality of flat wires can be bent and wired in the width direction of the flat wires. Further, as described above, by twisting each flat electric wire 45 to 90 degrees, the bending of the wire harness in the flat electric wire width direction can be changed to the bending of the laminated flat electric wire in the electric wire thickness direction, It can be bent smoothly with a small radius of curvature.

(A) is a disassembled perspective view which shows the wiring state in the lamination | stacking bending area | region of the wire harness of 1st Embodiment, (B) is CC sectional view taken on the line of (A). It is a perspective view which shows the state which attached the lamination | stacking clamp to the lamination | stacking bending area | region of FIG. (A) is a perspective view showing a state where a laminated braided region of FIG. 2 is covered with a metal braided tube together with parallel regions on both sides, and a protector is sheathed, and (B) is a sectional view of (A). A 2nd embodiment is shown, (A) is a perspective view, (B) is an AA line sectional view of (A), and (C) is a BB line sectional view of (A). It is a perspective view which shows 3rd Embodiment. It is sectional drawing which shows 4th Embodiment. It is a figure which shows a prior art example. It is a figure which shows a prior art example. (A) (B) is a figure which shows the problem of 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.
In the first embodiment, as shown in FIG. 1 (B), a flat electric wire 10 (width 15 mm, thickness 3.5 mm) in which a conductor 11 made of a rectangular shape with seven core wires 11 a arranged in parallel is covered with a resin 12. Are connected in parallel to form a wire harness 13, and an inverter and a motor of a hybrid vehicle (not shown) are connected by the wire harness 13.

  In an area where the wire harness 13 is bent and wired in the width direction (A direction) of the flat electric wire 10, the flat electric wires 10 are twisted 90 degrees one by one as shown in FIG. I am letting. Parallel clamps 16 for holding the three flat electric wires 10 in parallel are attached to the parallel regions 15 on both sides of the laminated bending region 14 where the flat electric wires 10 are twisted one by one and bent in a laminated state. As shown in FIG. 2, a laminated clamp 17 for attaching and holding three twisted flat electric wires 10 is attached.

  The laminated clamp 17 is made of resin, and as shown in FIG. 1A, four sandwiching pieces 17b are projected from the substrate portion 17a at a predetermined interval along the length direction of the substrate portion 17a. The laminated clamp 17 is inserted so that the length direction of the substrate portion 17a matches the length direction of the laminated bent region 14, and three pieces of laminated state are inserted into three spaces sandwiched between adjacent sandwiching pieces 17b of the laminated clamp 17. The laminated clamp 17 is attached to the laminated bending region 14 by inserting and holding the flat electric wires 10 respectively. In the present embodiment, the laminated clamp 17 is made of resin, but may be made of metal.

  As shown in FIGS. 3A and 3B, a metal braided tube 19 is placed on a laminated bending region 14 to which the laminated clamp 17 is attached together with a parallel region 15 continuous on both sides, and the metal braided tube (metal A protector 18 made of an insulating resin having a rectangular cross section formed in conformity with the outer shape of the laminated bent region 14 covered with the braided body 19 and a part of the parallel region 15 at both ends is packaged. In this embodiment, the height H of the protector 18 that covers the laminated bent region 14 can be set to 25 mm, and the entire wire harness 13 in which the flat electric wires 10 are arranged in parallel and covered with a flat corrugated tube as in the past is The height can be reduced to half of the height (50 mm) when bent in the wire width direction in a posture that rises in the direction.

  As described above, in the region where the wiring harness 13 composed of the three flat electric wires 10 arranged in parallel is bent in the width direction (A direction) of the flat electric wires 10, the three flat electric wires 10 arranged in parallel are twisted one by one. Therefore, the height of the wire harness 13 in the bent wiring region (laminated bent region 14) can be greatly reduced. Therefore, even if there is not enough wiring space in the height direction, the wire harness 13 composed of the three flat electric wires 10 arranged in parallel can be bent and wired in the width direction of the flat electric wires 10. Further, as described above, by twisting each flat wire 10 by 90 degrees, the bending of the wire harness 13 in the flat wire width direction can be changed to the bending of the laminated flat wire 10 in the wire thickness direction, It can be bent smoothly with a small radius of curvature.

  The parallel region 15 sandwiching the laminated bending region 14 fixes the three flat electric wires 10 in parallel by the parallel clamp 16, but when forming the laminated bending region 14, the parallel region 15 is fixed by a parallel fixing jig. In addition, after the laminated bent region 14 is formed and the laminated state is held by the laminated clamp, the parallel fixing jig may be removed and accommodated in the protector 18 to hold the shape.

4A to 4C show a second embodiment.
In the first embodiment, the protector 18 is used as the exterior material, but in the two embodiments, a rubber corrugated tube (so-called bellows tube) is used instead of the protector. That is, after the metal braided tube 19 is put on the parallel region 15 -the laminated bent region 14 -the parallel region 15 of the wire harness, the flat corrugated tube 25 is put on the outer periphery thereof. The corrugated tube 25 is not a resin molded product that does not deform in shape, but is a rubber bellows tube that deforms in shape, and can be deformed in accordance with the outer shape deformation in the parallel region 15 and the laminated bent region 14 of the wire harness 13. .
Note that, as described above, a soft resin may be used as long as the outer shape is deformable.

FIG. 5 shows a third embodiment.
In 3rd Embodiment, it is the same as that of 1st Embodiment except that the flat electric wire 10 is twisted 50 degree | times one by one in the lamination | stacking bending area | region 14, and is bent in the lamination | stacking state.

  In the third embodiment, as in the first embodiment, the height of the wire harness 13 in the laminated bending region 14 can be greatly reduced, and the twist angle is set to 50 degrees less than 90 degrees. In the laminated bending region 14, the wire harness 13 can be bent and wired three-dimensionally. That is, the bending in the width direction (A direction) of the flat electric wire 10 and the bending in the thickness direction [B direction shown in FIG. 1B and FIG. 5] which is the minor axis direction of the conductor of the flat electric wire 10 are combined. Three-dimensional bending is possible.

  In addition, in the said 1st-3rd embodiment, although the number of the flat electric wires 10 paralleled is set to 3, two or more, for example, 6 etc., are good.

FIG. 6 shows a fourth embodiment.
In the fourth embodiment, the conductor 20 of each flat wire 10 is formed by one conductor 21 having a rectangular cross section. The one conductor 21 may be any one formed by converging a large number of metal strands, one formed by accumulating band-shaped metal foils, or a conductor formed by a thick metal plate.

DESCRIPTION OF SYMBOLS 10 Flat electric wire 11, 20, 21 Conductor 11a Core wire 12 Resin 13 Wire harness 14 Lamination bending area 15 Parallel area 16 Parallel clamp 17 Lamination clamp 17a Board | substrate part 17b Clamping piece 18 Protector 19 Metal braided tube

Claims (4)

A wiring harness wiring structure in which a plurality of flat electric wires in which a plurality of core wires are arranged in parallel and a rectangular conductor or a conductor having a rectangular cross section is covered with a resin are wired in parallel to each other,
In the region where the plurality of parallel flat wires are bent in the width direction orthogonal to the length direction, they are not connected and fixed to each other, and each flat wire is twisted by 45 to 90 degrees and bent in the laminated state in the width direction. A wiring harness wiring structure characterized by that.   A laminate clamp made of resin or metal is provided in a laminated bending region in which the flat electric wires are twisted one by one and bent in a laminated state. The wiring structure of the wire harness according to claim 1, wherein each flat electric wire in a laminated state is held by sandwiching pieces adjacent to the clamp.   An inverter and a motor of a hybrid vehicle or an electric vehicle are connected by a wire harness in which the three flat wires are arranged in parallel, and the laminated bending region of the wire harness to which the laminated clamp is attached is a parallel region of flat wires continuous on both sides. The wiring structure of the wire harness according to claim 2, wherein the wiring structure is covered with a metal braided body, and further covered with a resin protector.   The height of the protector which exteriorizes the said lamination | stacking bending | flexion area | region is 20-30 mm in the wireness which arranged the said 3 flat electric wires with a width of 8-15 mm and thickness 3-5 mm in parallel. Wire harness wiring structure.

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