JP6757498B2 - Wire harness wiring structure - Google Patents

Description

The present invention relates to a wire harness wiring structure.

The wire harness wiring structure disclosed in Patent Document 1 includes a pipe as an exterior protective material that protects the wire harness distributed to the vehicle. The pipe is made of resin and is configured as an integrally molded product in which a straight pipe portion and a bellows pipe portion surrounding the wire harness are continuously provided. The wire harness is a high-voltage cable, and the pipe is colored orange to indicate that it is a high-voltage system. In the case of Patent Document 1, after the high-voltage cable is inserted into the pipe, the bellows tube portion is bent and assembled according to the vehicle layout.

Further, the wiring structure of the wire harness disclosed in Patent Document 2 includes an exterior member that protects the high-voltage coaxial composite conductive path also allocated to the vehicle. The exterior member is a resin pipe body, and has a bent pipe portion and a non-bent pipe portion. The non-bent pipe portion has a non-bent pipe portion main body having a circular cross section and a rib-shaped rigidity adding portion protruding from the outer surface of the non-bent pipe portion main body. The rigidity adding portion is provided on the non-bent pipe portion main body as an adding rigidity portion.

Japanese Unexamined Patent Publication No. 2009-143326 Japanese Unexamined Patent Publication No. 2014-42408

In the case of Patent Document 1, when the pipe is supported by a clamp and attached to the vehicle body, a large load is applied to the straight pipe portion due to the weight and runout of the high-voltage cable, and the axial middle portion of the straight pipe portion hangs down over time. May change. In that respect, according to Patent Document 2, it is possible to prevent the non-bent tube portion main body from being bent and deformed by the rigidity adding portion. However, there is a problem that the wiring space is taken up and the wiring structure becomes large due to the addition of the rigidity adding portion. Further, since the rigidity adding portion is made of resin, there is a concern that the rigidity may decrease due to material deterioration over time.

The present invention has been completed based on the above circumstances, and an object of the present invention is to prevent the resin pipe material from being deformed over time without causing an increase in the size of the wiring structure. ..

The present invention is a wiring structure of a wire harness inserted into a resin pipe material supported by a clamp, wherein the pipe material includes a straight pipe portion extending in the axial direction, and the straight pipe portion in the wire harness has a straight pipe portion. The inserted portion is characterized in that it contains a shape-retaining conductor capable of holding the wiring shape.

In the state where the resin pipe material is supported by the clamp, the axial middle part of the pipe material may change over time so as to hang down due to the weight of the wire harness, etc., but in the case of the present invention, the direct part of the wire harness Since the shape-retaining conductor is included in the portion inserted into the pipe portion, it is possible to prevent a large load from being applied to the straight pipe portion. As a result, it is possible to prevent the resin tube material from being deformed over time. Further, since it is not necessary to provide an additional structure on the outer periphery of the straight pipe portion, it is possible to prevent the wiring structure from becoming large.

It is a perspective view of the wiring structure of the wire harness which concerns on Example 1 of this invention. Similarly, it is a front view. Similarly, it is a bottom view. FIG. 2 is a cross-sectional view taken along line XX of FIG. FIG. 2 is a cross-sectional view taken along the line YY of FIG. It is a cross-sectional view taken along the line ZZ of FIG. It is the schematic which shows the state which the wire harness is assembled to the vehicle.

Preferred embodiments of the present invention are shown below.
The pipe material is provided with bendable and deformable curved pipe portions connected to both ends in the axial direction of the straight pipe portion, and the portion of the wire harness inserted into the curved pipe portion is electrically connected to the shape-retaining conductor. It is preferable to include a flexible conductor that can be bent and deformed. According to this, since the curved pipe portion can be easily bent along the wiring path, the assembling work to the attached body such as the vehicle body can be smoothly performed.

The connecting portion between the shape-retaining conductor and the flexible conductor may be arranged inside the straight pipe portion. According to this, it is possible to prevent bending stress from acting on the connecting portion at the time of route routing, and it is possible to improve the connection reliability of the connecting portion.

The support position where the pipe material is supported by the clamp may be set to a position closer to both ends in the axial direction of the straight pipe portion. According to this, the pipe material is stably supported by the clamp.

It is preferable that the support position is set at a position that overlaps with the connection portion in the axial direction. According to this, even if the assembled body such as the vehicle body vibrates, the swing width at the connecting portion can be suppressed to be small, and the influence of the vibration is less likely to reach the connecting portion. As a result, the connection reliability of the connection portion can be further improved.

<Example 1>
Hereinafter, Example 1 will be described with reference to the drawings. In the first embodiment, as shown in FIG. 7, a device 92 such as a high-voltage battery installed in the rear cabin 91 of a vehicle such as a hybrid vehicle and a device 94 such as an inverter installed in the front engine room 93. The wiring structure of the high-voltage wire harness 10 for connecting to and is illustrated. The wire harness 10 is inserted into the pipe material 30 as an exterior member, and is three-dimensionally arranged from the rear part to the front part of the vehicle while being protected by the pipe material 30.

The intermediate portion of the wire harness 10 in the axial direction (arrangement direction, front-rear direction of the vehicle body) is arranged along the underfloor of the vehicle body 90, and can maintain a constant shape. On the other hand, both ends (front end and rear end) of the wire harness 10 in the axial direction are bendable and deformable, and are pulled into the front engine room 93 and the rear passenger compartment 91 from the underfloor wiring region S1 of the vehicle body 90. It is connected to the corresponding devices 92 and 94 via the connector 40.

The wire harness 10 is composed of two high-pressure conductors 11. As shown in FIG. 6, each conductor 11 is twisted as a single-core wire 12 as a shape-retaining conductor extending in the axial direction and as a flexible conductor electrically and mechanically connected to both ends of the single-core wire 12 in the axial direction. It has a wire 13.

The single core wire 12 is a non-shielded wire composed of a single metal rod-shaped conductive portion 14 and an insulating coating 15 that surrounds the outer periphery of the conductive portion 14. The conductive portion 14 is made of a highly rigid conductive material having a circular cross section made of copper or a copper alloy, or aluminum or an aluminum alloy and maintaining its own shape. In the case of the first embodiment, since it is desired to reduce the weight of the conductor 11 in the underfloor wiring region S1, the conductive portion 14 is preferably made of aluminum or an aluminum alloy. As shown in FIG. 5, the conductive portions 14 are exposed at both ends in the axial direction of the single core wire 12, and the exposed conductive portions 14 are crushed to form a flat plate-shaped connecting portion 16. The total length (extended length) of the single core wire 12 is slightly shorter than the total length (extended length) of the straight pipe portion 31 which will be described later and surrounds the outer circumference of the single core wire 12.

The stranded wire 13 is a non-shielded electric wire composed of a core wire 17 formed by twisting a plurality of strands and an insulating coating 18 surrounding the outer periphery of the core wire 17. Each of the strands constituting the core wire 17 is formed of copper or a copper alloy, or aluminum or an aluminum alloy, and is made of a conductive material having low rigidity, easily bending, and easily bending and deforming.

As shown in FIG. 5, the insulating coating 18 is peeled off at both ends of the stranded wire 13 in the axial direction over a predetermined length range, and the core wire 17 is exposed. The exposed core wire 17 constitutes the core wire connecting portion 19. Of the two core wire connecting portions 19, the core wire connecting portion 19 on one end side in the axial direction (inside in the wiring direction) is overlapped with the plate-shaped connecting portion 16 of the single core wire 12 in the plate thickness direction for soldering, ultrasonic welding, or the like. The core wire connecting portion 19 which is connected by welding and is on the other end side in the axial direction (outside in the wiring direction) is connected to a terminal fitting (not shown), and the terminal fitting is housed in a corresponding connector 40, which the connector 40 corresponds to. It is connected to the devices 92 and 94 by being fitted into a connector (not shown) on the devices 92 and 94. The total length (extension length) of the stranded wire 13 is slightly longer than the total length (extension length) of the curved pipe portion 32 described later that surrounds the outer circumference of the stranded wire 13.

The entire circumference of the connecting portion 20 between the plate-shaped connecting portion 16 and the core wire connecting portion 19 is covered with a heat-shrinkable tube 80. As shown in FIGS. 5 and 6, the heat-shrinkable tube 80 is covered over the insulating coating 15 of the single core wire 12 and the insulating coating 18 of the stranded wire 13, is shrunk by heating, and is a covering region including the connecting portion 20. Is in close contact with. As a result, the connecting portion 20 between the single core wire 12 and the stranded wire 13 is waterproofed.

Further, the outer circumference of the conductor 11 is collectively surrounded by the braided member 70 over substantially the entire length of the single core wire 12 and the stranded wire 13. The braided member 70 is formed by knitting a conductive metal fine wire such as copper into a mesh shape to form a tubular shape. Both ends of the braided member 70 in the axial direction are conductively fixed to the connector 40. It is also possible to surround the braided member 70 with a metal foil or the like instead of the braided member 70.

The pipe material 30 is made of synthetic resin and has a tubular shape with a circular cross section as a whole, and has a straight pipe portion 31 extending in the axial direction and a curved pipe portion 32 connected to both ends in the axial direction of the straight pipe portion 31. I have. The straight pipe portion 31 and the curved pipe portion 32 are integrally formed by blow molding. The outer circumference of the conductor 11 together with the braided member 70 is surrounded by the pipe material 30. In the case of the first embodiment, the pipe material 30 is colored orange in order to indicate that the internal conductor 11 is a high-pressure system.

The curved pipe portion 32 is obtained by blow molding in a form of continuously extending in the axial direction from the straight pipe portion 31. Specifically, the curved tube portion 32 is configured as a corrugated bellows tube in which concave portions and convex portions are alternately formed in the axial direction, and can be bent and deformed at an arbitrary position in the axial direction. For this reason, as shown in FIG. 7, the curved pipe portion 32 is arranged corresponding to the region S2 drawn into the front engine room 93 and the rear passenger compartment 91 at the time of route routing, and is arranged in the lead-in area S2. It is possible to handle bending forms. As shown in FIG. 5, a flexible stranded wire 13 of the conductor 11 is inserted into the curved pipe portion 32, and the stranded wire 13 is bendable and deformable together with the curved pipe portion 32 and the braided member 70. The axial end portion (outer end portion in the wiring direction) of both curved pipe portions 32 faces the connector 40, and the tape 60 is wound between the two curved pipe portions 32 and the connector 40. As a result, both ends of the pipe material 30 in the axial direction are fixed to the connector 40.

The straight pipe portion 31 has a shape extending straight in the axial direction, and is formed in a cylindrical shape having the same diameter over the entire length. The inner and outer surfaces of the straight pipe portion 31 are peripheral surfaces having substantially no unevenness. The straight pipe portion 31 has a higher rigidity than the curved pipe portion 32, and is in a form that is difficult to bend. For this reason, as shown in FIG. 7, the straight pipe portion 31 is arranged corresponding to the underfloor distribution area S1 at the time of route allocation, and secures the shape retention required for the underfloor arrangement area S1. In addition, the straight pipe portion 31 also has chipping resistance that protects the conductor 11 from foreign matter such as stepping stones. As shown in FIG. 5, a single core wire 12 having a shape-retaining property is mainly inserted through the straight pipe portion 31, and the single core wire 12 maintains a constant shape together with the straight pipe portion 31. Is possible.

Of the stranded wires 13, the end portion on one end side in the axial direction including the core wire connecting portion 19 is arranged so as to enter the inside of the straight pipe portion 31. Therefore, the connecting portion 20 between the plate-shaped connecting portion 16 and the core wire connecting portion 19 is located inside the straight pipe portion 31.

The pipe material 30 is supported by the clamp 50, and is suspended and fixed to the underfloor side of the vehicle body 90 by the clamp 50. As shown in FIG. 4, the clamp 50 includes a pipe holding portion 51 that fits and holds the straight pipe portion 31 of the pipe material 30, and a vehicle body locking portion 52 that is locked to the underfloor side of the vehicle body 90. Is formed in. The pipe holding portion 51 and the vehicle body locking portion 52 are arranged in parallel with each other in the vertical direction orthogonal to the axial direction which is the extending direction of the pipe material 30. The parallel direction of the pipe holding portion 51 and the vehicle body locking portion 52 is the same as the parallel direction of the two conductors 11 and the overlapping surface direction of the connecting portion 20.

The pipe holding portion 51 has a circular cross-sectional shape curved along the outer circumference of the straight pipe portion 31, and is capable of internally fitting and holding the straight pipe portion 31. The vehicle body locking portion 52 has a double plate shape that extends continuously from both ends in the circumferential direction of the straight pipe portion 31, and is attached to the underfloor side of the vehicle body 90 via a fixture (not shown). As shown in FIGS. 1 and 2, the vehicle body locking portion 52 is provided with a circular locking hole 53 through which a fixture is passed.

The clamp 50 is attached to the pipe member 30 at least at a position closer to both ends in the axial direction of the straight pipe portion 31 and adjacent to the curved pipe portion 32 at intervals. Specifically, as shown in FIG. 5, the clamp 50 is located at least at a position in the pipe material 30 that overlaps the connecting portion 20 between the plate-shaped connecting portion 16 and the core wire connecting portion 19 in the axial direction, more specifically. , It is attached at a position including the entire connecting portion 20 between the plate-shaped connecting portion 16 and the core wire connecting portion 19 in the axial direction at intervals.

Next, the operation of the first embodiment will be described.
At the time of assembly, the core wire connecting portion 19 of the stranded wire 13 is overlapped with the plate-shaped connecting portion 16 of the single core wire 12 in advance, and this overlapping portion (connecting portion 20) is electrically and mechanically connected by soldering or welding. As a result, the single core wire 12 and the stranded wire 13 are connected via the connecting portion 20, and a conductor 11 in which the single core wire 12 and the stranded wire 13 are sequentially connected in the axial direction is obtained.

Subsequently, the conductor 11 and the braided member 70 are inserted into the long pipe material 30 formed linearly by blow molding. Axial both ends of the conductor 11 (outer ends in the wiring direction of both stranded wires 13) are outward by a predetermined length from both ends in the axial direction of the pipe material 30 (outer ends in the wiring direction of both curved pipe portions 32). By being in a protruding state, the connecting portion 20 is arranged at a position closer to both ends in the axial direction of the straight pipe portion 31. Terminal fittings are connected to both ends of the conductor 11 in the axial direction at appropriate timings, the terminal fittings are housed and held in the corresponding connector 40, and the tape 60 is wound across the connector 40 and the pipe material 30. Further, at appropriate timings, the pipe holding portions 51 of the clamp 50 are fitted to both ends of the straight pipe portion 31 in the axial direction.

Next, as shown in FIG. 7, the assembly of the wire harness 10 is moved from the underfloor side (underfloor wiring area S1 side) of the vehicle body 90 to the front engine room 93 and the rear vehicle compartment 91 (pull-in area S2 side). It is routed along a predetermined routing route. At this time, the straight pipe portion 31 supported by the clamp 50 is arranged on the underfloor wiring region S1 side of the vehicle body 90, and is bent according to the bending form of the retracting region S2 on the front and rear retracting regions S2 side of the vehicle body 90. The curved tube portion 32 is arranged. Here, the curved pipe portion 32 is bent by the manual force (hand) of the operator.

By the way, unlike the first embodiment, if the portion of the conductor 11 corresponding to the single core wire 12 is composed of a flexible conductor such as a stranded wire 13 instead of the single core wire 12, the pipe material 30 Is supported by the clamp 50, a large load due to the weight and runout of the flexible conductor acts on the straight pipe portion 31 over time. Therefore, with the passage of time over time, the axial intermediate portion of the straight pipe portion 31 may be deformed so as to hang down due to the load.

In that respect, in the case of the first embodiment, since the portion of the conductor 11 to be inserted into the straight pipe portion 31 is mainly composed of the single core wire 12 having self-shape retention, the axial intermediate portion of the straight pipe portion 31 Since a large load is not applied to the single core wire 12, it is possible to prevent the straight pipe portion 31 from being deformed so as to hang down. Moreover, if the single core wire 12 is made of aluminum or an aluminum alloy, the weight of the single core wire 12 itself can be reduced.

Further, according to the first embodiment, since it is not necessary to provide an additional structure for imparting rigidity to the outer periphery of the straight pipe portion 31 in order to prevent the straight pipe portion 31 from being deformed, the size of the wiring structure is increased. Does not invite.

Further, the pipe material 30 is provided with bendable and deformable curved pipe portions 32 which are continuously provided at both ends in the axial direction of the straight pipe portion 31, and can be bent and deformed at a portion of the wire harness 10 which is inserted into the bent pipe portion 32. Since the stranded wire 13 as a flexible conductor is included, the curved pipe portion 32 can be easily bent along the wiring path, and the assembling work to the vehicle body 90 can be smoothly performed.

Further, since the connecting portion 20 between the single core wire 12 and the stranded wire 13 is arranged inside the straight pipe portion 31, it is possible to prevent bending stress from acting on the connecting portion 20 at the time of route routing, and the connecting portion. The connection reliability of 20 can be improved.

Furthermore, since the support position where the pipe material 30 is supported by the clamp 50 is set to a position closer to both ends in the axial direction of the straight pipe portion 31, and that position also overlaps with the connecting portion 20 in the axial direction, it is assumed that the vehicle body Even if the 90 vibrates, the swing width at the connecting portion 20 can be suppressed to be small by the clamp 50 fixed to the vehicle body 90, and the influence of the vibration on the connecting portion 20 can be reduced. As a result, the connection reliability of the connection portion 20 can be further improved.

<Other Examples>
Hereinafter, other embodiments will be briefly described.
(1) Of the conductor, the portion corresponding to the single core wire may be a shape-retaining conductor, and may be a conductive cylinder such as a metal pipe instead of the single core wire.
(2) The shape-retaining conductor (single-core wire in the case of Example 1) and the flexible conductor (stranded wire in the case of Example 1) may be connected via terminal fittings. In this case, for example, a round terminal (so-called LA terminal) may be connected to the exposed core wire of the flexible conductor, and the round terminal may be fastened and fixed to the plate-shaped connection portion of the single core wire by a bolt or the like. ..
(3) The straight pipe portion and the curved pipe portion may have separate structures that can be separated from each other.
(4) For example, when the wiring path does not include a bent portion, the pipe material may be composed of only a straight pipe portion and may have a structure having no curved pipe portion.
(5) The curved pipe portion may be bent by a bender machine.
(6) In the first embodiment, the wiring structure of the wire harness having the shielding function is shown, but the present invention can be widely applied to the wiring structure of the wire harness having the shielding function.

10 ... Wire harness 11 ... Conductor 12 ... Single core wire (shape-retaining conductor)
13 ... Stranded wire (flexible conductor)
20 ... Connection part 30 ... Pipe material 31 ... Straight pipe part 32 ... Curved pipe part 50 ... Clamp

Claims (3)

It is a wiring structure of a wire harness that is inserted into a resin pipe material supported by a clamp.
The pipe material includes a straight pipe portion extending in the axial direction.
The portion of the wire harness that is inserted into the straight pipe portion includes a shape-retaining conductor capable of holding the wiring shape .
The pipe material includes bendable and deformable curved pipe portions that are continuously provided at both ends in the axial direction of the straight pipe portion.
The portion of the wire harness that is inserted into the curved tube portion includes a bendable and deformable flexible conductor that is electrically connected to the shape-retaining conductor.
The connecting portion between the shape-retaining conductor and the flexible conductor is arranged inside the straight pipe portion.
The support position in which the pipe material is supported by the clamp is set at a position closer to both ends in the axial direction of the straight pipe portion and adjacent to the curved pipe portion.
A wire harness wiring structure in which the support position is set so as to overlap the connection portion in the axial direction . The first aspect of claim 1, wherein the curved tube portion is configured as a bellows tube, the straight tube portion extends in the axial direction with the same diameter, and the curved tube portion and the straight tube portion are integrated by blow molding. Wire harness wiring structure. The clamp has a pipe holding portion for fitting the straight pipe portion and a vehicle body locking portion locked to the vehicle body, and the arrangement direction of the pipe holding portion and the vehicle body locking portion is the connecting portion. The wiring structure of the wire harness according to claim 1 or 2, which is the same as the direction of the overlapping surface of the above.

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