JP7207995B2 - Exterior materials and wire harnesses - Google Patents

Description

The present invention relates to an exterior member through which a conductive path is inserted. The present invention also relates to a wire harness including an exterior member and a conductive path.

For example, in vehicles that use a motor as a drive source, such as electric vehicles and hybrid vehicles, a high-voltage wire harness for electrically connecting a battery and an inverter is installed. A wire harness includes a conductive path such as an electric wire and an exterior member through which the conductive path is inserted. Since heat is generated in the conductive path of the wire harness when it is used, in the following patent document 1, the exterior member is made of a metal pipe with good thermal conductivity so that the heat generated in the conductive path can escape to the outside. I have to.

JP 2014-82909 A

In the prior art described above, metal pipes are used as exterior members, but in recent years, there is an increasing need for exterior members made of resin. Therefore, it is necessary to allow the heat generated in the conductive path to escape to the outside even with the resin-made exterior member, as with the metal pipe.

The present invention has been made in view of the circumstances described above, and an object of the present invention is to provide an exterior member with high heat dissipation. Another object of the present invention is to provide a wire harness having an exterior member.

The exterior member of the present invention described in claim 1, which has been made to solve the above problems, comprises a resin-made first exterior body in which one or more conductive paths are inserted, and the first exterior body. An exterior fixing portion provided on the outside and fixed to a mating fixing member, and a conductive path contact portion provided on the first exterior main body, the conductive path contact portion being capable of contacting the conductive path on the inside. It is a portion arranged at a position, a portion having a higher thermal conductivity than the first exterior main body, and a portion extending to the exterior fixing portion , wherein the first exterior main body is the first It has a box-like shape including a bottom wall extending in the axial direction of the exterior main body and a pair of side walls rising from both side edges of the bottom wall and extending in the axial direction, and the conductive path contact portion is located at the bottom. It extends in a direction crossing the axial direction so as to straddle the wall and the pair of side walls, and extends from the pair of side walls to the exterior fixing portion .

According to the present invention having the characteristics of claim 1, the heat generated in the conductive path is transmitted to the conductive path contact portion and the exterior fixing portion, and the transmitted heat is released to the mating fixing member to realize heat dissipation. Since the structure is such that it is made of resin, it is possible to provide an exterior member with high heat dissipation. In addition, according to the present invention, since the heat dissipation is enhanced, the operating environment temperature of the conductive path can be lowered, so that the diameter of the conductive path can be reduced, and the weight of the conductive path can be reduced by reducing the diameter. can.

The present invention according to claim 2 is the exterior member according to claim 1, wherein a resin-made second end continuous with one end and/or the other end in the axial direction of the first exterior main body and through which the conductive path is inserted. It is characterized by comprising two exterior main bodies, the second exterior main body being a tubular portion having a longer length in the axial direction than the first exterior main body.

According to the present invention having such a feature of claim 2, it has the first exterior main body and the second exterior main body as the insertion part of the conductive path, and among these, the first exterior main body having the exterior fixing part Since the conductive path contact portion is provided to contribute to heat dissipation, heat can be efficiently dissipated.

Further, a wire harness according to claim 3 of the present invention, which has been made to solve the above problems, is provided by inserting through the exterior member according to claim 2, and the first exterior main body and the second exterior main body of the exterior member. and one or more conductive paths.

According to the present invention having such a feature of claim 3, since the exterior member made of resin with high heat dissipation is provided, heat dissipation can be improved even as a wire harness.

According to the present invention of claim 4, in the wire harness of claim 3, the heat of the conductive path is transferred from the outer surface to the inner surface by contacting the inner surface of the second exterior main body and the outer surface of the conductive path. A heat transfer member is provided , and the heat transfer member includes an annular conductive path side contact portion that covers and contacts the outer surface of the conductive path, and a conductive path side contact portion that extends from the conductive path side contact portion toward the inner surface of the second exterior main body. and a plurality of radial ribs projecting radially and whose tips are in contact with the inner surface .

According to the present invention having such a feature of claim 4, since the structure is such that the heat generated in the conductive path is transmitted to the second exterior main body via the heat transfer member, This transmitted heat can be released to the outside. That is, it is possible to realize heat dissipation even at the outer surface portion of the second exterior main body of the exterior member. In addition, if heat can be dissipated from the outer surface of the second exterior main body, heat is less likely to accumulate inside the second exterior main body. It is possible to reduce the weight of the conductive path and the wire harness by reducing the diameter of the wire.

The present invention according to claim 5 is the wire harness according to claim 3 or 4, wherein the number of the conductive paths is plural, and a spacer for regulating contact between the plural conductive paths in the second exterior main body and the spacer has a lower thermal conductivity than the plurality of conductive paths.

According to the present invention having such a feature of claim 5, since the spacer is provided for restricting contact between the plurality of conductive paths, it is possible to reduce the influence of heat between the conductive paths.

According to a sixth aspect of the present invention, there is provided the wire harness according to the third, fourth or fifth aspect, wherein the exterior member is arranged and fixed under the floor of the vehicle as a mating fixing member.

According to the present invention having such a feature of claim 6, since the exterior member is arranged and fixed under the floor of the vehicle, it is possible to easily dissipate heat from the exterior member exposed to the outside.

ADVANTAGE OF THE INVENTION According to this invention, it is effective in the ability to provide an exterior member and a wire harness with high heat dissipation.

BRIEF DESCRIPTION OF THE DRAWINGS It is a figure which shows one embodiment of the exterior member and wire harness of this invention, (a) is a schematic diagram which shows the wiring state of a high voltage wire harness, (b) is a low voltage different from (a). It is a schematic diagram which shows the wiring state of a wire harness. FIG. 2 is a plan view of a first exterior member that constitutes the exterior member of FIG. 1; 3 is a plan view showing a state of conductive paths inside the first exterior member of FIG. 2; FIG. FIG. 10 is a configuration diagram showing another example of an exterior member; FIG. 5 is a cross-sectional view of the wire harness at the position of the second exterior member in the exterior member of FIG. 1 or FIG. 4; FIG. 6 is an explanatory diagram regarding the arrangement of heat transfer members in FIG. 5 ; As another example, it is a figure of the wire harness in the position of the 2nd exterior member in the exterior member of FIG. 1 or FIG. 4, (a) is sectional drawing, (b) is a perspective view of the spacer of (a). . As another example, it is a figure of the wire harness in the position of the 2nd exterior member in the exterior member of FIG. 1 or FIG. 4, (a) is sectional drawing, (b) is a perspective view of the spacer of (a). .

A wire harness includes an exterior member and one or more conductive paths that are inserted through the exterior member. The exterior member includes a resin-made first exterior body into which the conductive path is inserted, an exterior fixing portion provided outside the first exterior body and fixed to a mating fixing member, and a first exterior body provided on the first exterior body. and a conductive track contact. The conductive path contact portion is a portion arranged at a position where the conductive path can contact inside the first exterior main body, and is a portion having a higher thermal conductivity than the first exterior main body, and It is the part that extends to the fixed part. The exterior member further includes a resin-made second exterior body continuous with one end and/or the other axial end of the first exterior body and through which the conductive path is inserted. The second exterior main body is a cylindrical portion that is longer in the axial direction than the first exterior main body.

An embodiment will be described below with reference to the drawings. FIG. 1 is a diagram showing an embodiment of the exterior member and wire harness of the present invention, (a) is a schematic diagram showing the wiring state of the high voltage wire harness, (b) is different from (a) It is a schematic diagram which shows the wiring state of the wire harness of a low voltage. 2 is a plan view of a first exterior member constituting the exterior member of FIG. 1, FIG. 3 is a plan view showing the state of conductive paths inside the first exterior member of FIG. 2, and FIG. It is a block diagram showing an example of.

5 is a cross-sectional view of the wire harness at the position of the second exterior member in the exterior member of FIG. 1 or FIG. As an example of 1, it is a figure of the wire harness in the position of the 2nd exterior member in the exterior member of FIG. 1 or FIG. 4, (a) is sectional drawing, (b) is a perspective view of the spacer of (a).

In this embodiment, the present invention is applied to an exterior member of a wire harness installed in a hybrid vehicle. Note that the vehicle is not limited to a hybrid vehicle, and may be a vehicle such as a PHV or an electric vehicle that uses a motor as a drive source, or a general vehicle that runs only with an engine. The engine may be used only for power generation. In addition, it may be a fuel cell vehicle or an automatic driving vehicle.

<Regarding the configuration of the hybrid vehicle 1>
In FIG. 1(a), reference numeral 1 indicates a hybrid vehicle. A hybrid vehicle 1 is a vehicle that is driven by mixing two motive powers of an engine 2 and a motor unit 3. Electric power is supplied from a battery 5 (battery pack) to the motor unit 3 via an inverter unit 4. . The engine 2, the motor unit 3, and the inverter unit 4 are mounted in the engine room 6 where the front wheels and the like are located in this embodiment. Also, the battery 5 is mounted in the rear part 7 of the automobile where there are rear wheels and the like (it may be mounted in a position inside the automobile cabin behind the engine room 6).

The motor unit 3 and the inverter unit 4 are connected by a high-voltage wire harness 8 (motor cable for high voltage). The battery 5 and the inverter unit 4 are also connected by a high voltage wire harness 9 . The intermediate portion 10 of the wire harness 9 is routed in the underfloor 11 of the vehicle (in the vehicle body). Further, the intermediate portion 10 is routed substantially parallel along the underfloor 11 of the vehicle. The underfloor 11 of the vehicle is a known body (vehicle body) and a so-called panel member, and through holes are formed at predetermined positions. The wire harness 9 is watertightly inserted through the through hole.

The wire harness 9 and the battery 5 are connected via a junction block 12 provided on the battery 5 . The junction block 12 is electrically connected to external connection means such as a shield connector 14 provided at a harness terminal 13 on the rear end side of the wire harness 9 . Also, the wire harness 9 and the inverter unit 4 are electrically connected via external connection means such as a shield connector 14 disposed at the harness terminal 13 on the front end side.

The motor unit 3 includes a motor and a generator. Further, the inverter unit 4 includes an inverter and a converter in its configuration. The motor unit 3 is formed as a motor assembly including a shield case. Inverter unit 4 is also formed as an inverter assembly including a shield case. The battery 5 is of the Ni--MH system or the Li-ion system, and is made into a module. It is also possible to use an electrical storage device such as a capacitor. Of course, the battery 5 is not particularly limited as long as it is for high voltage and can be used in the hybrid vehicle 1, electric vehicles, and the like.

In FIG. 1(b), reference numeral 15 indicates a wire harness. The wire harness 15 is of low voltage (for low voltage) and electrically connects the low voltage battery 16 in the rear portion 7 of the hybrid vehicle 1 and the auxiliary device 18 (equipment) mounted in the front portion 17 of the vehicle. provided for connection. The wire harness 15 is routed through the underfloor 11 of the vehicle in the same manner as the wire harness 9 in FIG. A reference numeral 19 in the wire harness 15 indicates a harness body. Reference numeral 20 indicates a connector.

As shown in FIGS. 1A and 1B, a hybrid vehicle 1 is provided with high-voltage wire harnesses 8 and 9 and a low-voltage wire harness 15 . Although the present invention can be applied to any wire harness, the high-voltage wire harness 9 will be described as a representative example below. First, the configuration and structure of the wire harness 9 will be described.

<Regarding the configuration of the wire harness 9>
In FIG. 1A, the long wire harness 9 routed through the underfloor 11 of the vehicle includes a harness body 21 and shield connectors disposed at both terminals (harness terminals 13) of the harness body 21, respectively. 14 (external connection means). Moreover, the wire harness 9 includes a clamp C (see FIG. 4) for routing itself to a predetermined position, and a water stop member (eg, grommet, etc.) not shown.

<Regarding the configuration of the harness body 21>
1 to 3, the harness body 21 includes two elongated conductive paths 22, a shield member 23 that collectively covers the conductive paths 22, and the two conductive paths 22 covered with the shield member 23. and an exterior member 24 through which is inserted. The exterior member 24 of the harness body 21 is a feature of the present invention. The harness body 21 is not limited to the above configuration, and may include a heat transfer member 43 (see FIG. 5) and spacers 47 and 50 (see FIGS. 7 and 8), which will be described later.

<Regarding Conductive Path 22>
2, 3 and 5, the conductive path 22 comprises a conductive conductor 25 and an insulating insulator 26 covering the conductor 25. As shown in FIG. In this embodiment, the conductive path 22 is one without a sheath (this is an example). Since the conductive path 22 does not have a sheath, it becomes lighter accordingly. .

The conductor 25 is made of copper, copper alloy, aluminum or aluminum alloy and has a circular cross section. The conductor 25 has a conductor structure in which strands are twisted together, or a rod-shaped conductor structure having a circular (round) cross-section (for example, a conductor structure having a round single core). ), or any of them. An insulator 26 made of an insulating resin material is extruded on the outer surface of the conductor 25 as described above.

The insulator 26 is extruded onto the outer peripheral surface of the conductor 25 using a thermoplastic resin material. The insulator 26 is formed as a covering having a circular cross section. The insulator 26 is formed with a predetermined thickness. As the thermoplastic resin, various known types can be used, and the thermoplastic resin is appropriately selected from polymer materials such as polyvinyl chloride resin, polyethylene resin, and polypropylene resin.

<Regarding the shield member 23>
In FIGS. 2 to 5, the shield member 23 collectively covers the two conductive paths 22, and braid is adopted in this embodiment (one example is metal foil, It may be a sheet for stepping on metal foil, etc.). The shield member 23 is provided to exhibit a shield function. The braid (shield member 23) is formed in a cylindrical shape by weaving ultra-thin wires having conductivity. Also, the braid is formed in a shape and size so as to cover the entire outer peripheral surface of the insulator 26 from one end to the other end. It should be noted that the shield member 23 may cover the two conductive paths 22 one by one.

<Regarding the exterior member 24>
In FIGS. 1 to 3, the exterior member 24 is a resin molded product molded using a resin material having insulating properties, and includes a first exterior member 27 and a second exterior member 28. . The exterior member 24 is formed by combining a first exterior member 27 and a second exterior member 28 so as to accommodate and protect the two conductive paths 22 covered with the shield member 23 . Further, the exterior member 24 is formed so that the portion of the first exterior member 27 and the second exterior member 28 can be arranged and fixed at a predetermined position of the vehicle underfloor 11 .

<About the first exterior member 27>
1 to 3, the first exterior member 27 has, in addition to the structure for housing and protection described above, a heat dissipation structure for releasing heat generated in the conductive path 22 to the vehicle underfloor 11 (mating fixing member). . The first exterior member 27 is a resin molded product, and has the above-described heat dissipation structure. 33. Although the first exterior members 27 are illustrated as being arranged and fixed at two locations (front side and rear side) of the vehicle underfloor 11, this number and fixing positions are merely examples. The configuration of the first exterior member 27 will be described below.

<Regarding the first exterior main body 29>
2 and 3, the first exterior main body 29 includes a case 34 and a cover 35 for accommodating and protecting the two conductive paths 22 covered with the shield member 23. As shown in FIG. As shown in FIG. 3, the case 34 is rectangular in plan view and has a bottomed box shape. Specifically, a shallow bottom wall, a pair of long side walls parallel to the axial direction of the first exterior member 27, and a pair of short side walls arranged at one end and the other end of the first exterior member 27 are provided. It is formed in a box-like shape (the reference numerals for each wall are omitted). A pair of short sidewalls of the case 34 are formed with engaging portions. This engagement portion is formed at a portion of the second exterior member 28 with which a second exterior main body 36, which will be described later, engages. The pair of long side walls are integrally formed with exterior fixing portions 30 . The exterior fixing portion 30 is formed at three locations in this embodiment. Conductive path contact portions 32 are arranged on the bottom wall in accordance with the positions of the three locations. On the other hand, the cover 35 is formed at a portion where the inner surface covers the opening of the case 34 . Further, the outer surface of the cover 35 is formed to face the vehicle underfloor 11 (see FIG. 1). The cover 35 preferably has a shape that can cover the opening of the case 34 in a watertight manner.

<Regarding the exterior fixing part 30 and the collar 31>
2 and 3, the exterior fixing portion 30 is provided for fixing the first exterior member 27 to the vehicle underfloor 11 (see FIG. 1). The exterior fixing portion 30 is formed in a leg-like portion that protrudes short to the outside of the first exterior main body 29 . The exterior fixing portions 30 are arranged and formed at three locations as described above. A cylindrical collar 31 made of metal is integrally provided with such an exterior fixing portion 30 by insert molding. The collar 31 has a higher thermal conductivity than the resin-molded portions of the exterior fixing portion 30 and the first exterior main body 29 . Further, the collar 31 employs one through which a fixing bolt (not shown) (basically the same as the bolt B in FIG. 4) is inserted. One end of the collar 31 is formed into a flat surface that is in surface contact with the vehicle underfloor 11 .

<Regarding Conductive Path Contact Portion 32>
In FIGS. 2 and 3, the conductive path contact portion 32 is provided so as to straddle the bottom wall and the pair of long side walls of the case 34 in the first exterior main body 29 . Also, the conductive path contact portion 32 is provided so as to extend from the pair of long side walls to the collar 31 of the exterior fixing portion 30 . The conductive path contact portion 32 is a portion that constitutes a heat dissipation structure for releasing heat generated in the conductive path 22 to the vehicle underfloor 11 (mating fixing member). It is integrally provided by insert-molding a part having a higher thermal conductivity than the resin-molded part in . As the conductive path contact portion 32, for example, a metal member made of the same or similar material as that of the collar 31 may be used (this is an example. It may be made of the same or similar material as that of the shield member 23). ). The conductive path contact portion 32 is arranged and formed so as to be flush with the bottom wall of the case 34 or to protrude slightly from the bottom wall. The conductive path contact portion 32 is provided so that the two conductive paths 22 covered with the shield member 23 are in contact with each other. In this embodiment, the conductive path contact portion 32 is formed in a shape extending in a direction (perpendicular direction) crossing the axial direction. Incidentally, the conductive path contact portion 32 may include a portion extending in the axial direction such that the two conductive paths 22 covered with the shield member 23 are in contact with each other for a relatively long time.

<Concerning Conductive Path Holding Portion 33>
In FIG. 3, the conductive path holding portion 33 is for keeping the two conductive paths 22 covered with the shield member 23 in contact with the conductive path contact portion 32. In the example, known zip ties are employed. The conductive path holding portion 33 is fixed to the bottom wall of the case 34 of the first exterior main body 29 by an appropriate method.

<About the effect of the first exterior member 27>
1 to 3, the first exterior member 27 transmits heat generated in the conductive path 22 to the conductive path contact portion 32 and the collar 31 of the exterior fixing portion 30, and transfers the transmitted heat to the vehicle underfloor 11 (mating device). Since the first exterior member 27 has a structure in which heat is released by releasing it to the fixed member), heat dissipation can be improved even if the first exterior member 27 is made of resin (resin molded product). In addition, since the heat dissipation is enhanced as described above, the environmental temperature in which the conducting path 22 is used can be lowered. can.

<Regarding the second exterior member 28>
In FIGS. 1 to 3, the second exterior member 28 is a cylindrical portion continuous with the one end and the other end of the first exterior member 27, and has two conductive wires covered with the shield member 23 inside. A passage 22 is inserted. The second exterior member 28 is a resin molded product, and is formed so as to accommodate and protect the two conductive paths 22 covered with the shield member 23 . The second armor member 28 is formed such that it itself becomes the second armor body 36 in this embodiment. As the second exterior member 28 (the second exterior main body 36), for example, a corrugated tube having a corrugated tube shape as shown in the figure is adopted. In this embodiment, a corrugated tube having a circular cross section is used, but it may also have an oval or rectangular cross section. A corrugated tube is employed as the second exterior member 28 (second exterior main body 36), but other than this, the following can be mentioned (see FIG. 4).

<Regarding another example of the exterior member 37>
In FIG. 4, the exterior member 37, which is another example, is a resin molded product molded using a resin material having insulating properties, and includes a first exterior member 38 and a second exterior member 39. be done. The exterior member 37 is formed by combining a first exterior member 38 and a second exterior member 39 so as to accommodate and protect the two conductive paths 22 covered with the shield member 23 . Further, the exterior member 37 is formed so that the portions of the first exterior member 38 and the second exterior member 39 can be arranged and fixed to the underfloor 11 of the vehicle. Note that the first exterior member 38 is basically the same as the first exterior member 27 in FIGS. 2 and 3, and the description thereof will be omitted here.

<Regarding the second exterior member 39>
In FIG. 4, the second exterior member 39 is a cylindrical portion continuous with one end and the other end of the first exterior member 38, and is formed in a shape without belly split (in other words, a slit (formed into a shape that is not a split tube)). The second exterior member 39 is shown having a flexible flexible tube portion 40 and a straight tube portion 41 as a portion for straightly routing the two conductive paths 22 covered with the shield member 23. formed into shape. The second exterior member 39 is formed by arranging a plurality of flexible tube portions 40 and straight tube portions 41 in the tube axis CL direction. In addition, the flexible tube portion 40 and the straight tube portion 41 are alternately arranged.

The flexible tube portion 40 is arranged according to the shape of the mating fixing member 42 . The flexible tube portion 40 is formed so that it can be bent at a desired angle when the wire harness 9 is packed, transported, or routed to a vehicle. The flexible tube portion 40 is formed so that it can be bent into a bent shape and can also be returned to a straight original state (state at the time of resin molding). The flexible tube portion 40 is formed in a bellows tube shape having a bellows concave portion and a bellows convex portion.

The straight tube portion 41 is formed as a portion that does not have flexibility like the flexible tube portion 40 . In addition, the straight tube portion 41 is also formed as a portion that does not bend during packaging, transportation, and route routing (a portion that does not bend means a portion that does not actively have flexibility). be). The straight pipe portion 41 is formed in a straight pipe shape. The outer peripheral surface of the straight pipe portion 41 is formed in a shape without unevenness. The straight tube portion 41 is formed as a rigid portion compared to the flexible tube portion 40 . A clamp C is attached to such a straight tube portion 41 . The clamp C is fixed to the mating fixing member 42 with a bolt B. As shown in FIG.

<Regarding the configuration of the harness body 21 as another example>
5 and 6, a harness body 21, which is another example, includes two long conductive paths 22, a shield member 23 that collectively covers the conductive paths 22, and two shield members 23 covered with the shield member 23. It is composed of an exterior member 24 (or exterior member 37 in FIG. 4) through which the conductive path 22 of the book is inserted, and a heat transfer member 43 provided inside the exterior member 24 . Here, the heat transfer member 43 is a feature of the present invention.

<Regarding the heat transfer member 43>
5 and 6, the heat transfer member 43 is arranged at the position of the second exterior member 28 (or the second exterior member 39 in FIG. 4). The heat transfer member 43 is a member that is retrofitted to the two conductive paths 22 covered with the shield member 23, and is attached to the inner surface 44 of the second exterior main body 36 of the second exterior member 28 and the shield member 23 (conductive path portion corresponding to the outer surface of 22 ) to conduct heat generated in the conductive path 22 from (the outer surface of) the shield member 23 to the inner surface 44 of the second exterior main body 36 . The transmitted heat is released when the outer surface of the second exterior main body 36 is exposed to the outside air while the vehicle is running.

As can be seen from the above description, the heat transfer member 43 is shaped to contact the inner surface 44 of the second exterior main body 36 and the shield member 23 . In addition, the heat transfer member 43 is formed in a shape that does not create a closed space so that heat does not stay inside the second exterior main body 36 . Also, the heat transfer member 43 is formed into a shape that facilitates insertion of the two conductive paths 22 covered by the shield member 23 inside the second exterior main body 36 . Specifically, it has an annular conductive-path-side contact portion 45 and a plurality of radial ribs 46 radially projecting from the conductive-path-side contact portion 45 toward the inner surface 44 of the second exterior main body 36, and has a conductive shape shown in the figure. A thermal member 43 is formed.

In this embodiment, the heat transfer member 43 is provided at a predetermined position of the shield member 23 by resin molding. A plurality of radial ribs 46 are formed to protrude with different lengths according to the distance to the inner surface 44 of the second exterior main body 36 . The plurality of radial ribs 46 are formed to have flexibility so that adjacent ribs can be moved closer to each other. Further, the plurality of radial ribs 46 are formed in such a shape that the tips of the ribs do not get caught in the bellows recesses even if the second exterior main body 36 has, for example, a bellows tube shape. That is, the length of the tip of the rib in the pipe axis direction is longer than the width of the bellows recess. The heat transfer member 43 is formed in an intermittent arrangement as indicated by range H1 in FIG. 6 and/or a continuous arrangement as indicated by range H2.

The heat transfer member 43 has a function of preventing the conductive path 22 from fluttering inside the second exterior main body 36 in addition to a function of heat transfer (a function of heat dissipation). It also has a function of increasing rigidity. The heat transfer member 43 is a multifunctional member.

<About the effect of the heat transfer member 43>
5 and 6, the heat transfer member 43 transfers the heat generated in the conductive path 22 to the second exterior main body 36, so that the heat can escape to the outside through the second exterior main body 36. As shown in FIG. That is, it is possible to realize heat dissipation even in the portion of the second exterior main body 36 . If heat can be dissipated from the second exterior main body 36, the heat is less likely to stay inside the second exterior main body 36, so that the operating environment temperature of the conductive path 22 can be further lowered, thereby reducing the diameter of the conductive path 22. Also, the weight of the conductive path 22 and the wire harness 9 can be reduced by reducing the diameter.

<Regarding the configuration of the harness body 21 as another example>
In FIG. 7, a harness body 21, which is another example, includes two long conductive paths 22 and a shield member (not shown) that covers the conductive paths 22 collectively. ), a spacer 47 for regulating contact between the two conductive paths 22, and an exterior member 24 (or an exterior member 37 in FIG. 4) through which the two conductive paths 22 are inserted together with the spacer 47. configured with Here, the spacer 47 is a feature of the invention.

<Regarding the spacer 47>
In FIG. 7, the spacer 47 is a resin molded product molded using a resin material having a lower thermal conductivity than the two conductive paths 22. A cylindrical portion 49 having a slit 48 is arranged side by side as shown in the drawing. It is an integrated one. The length L of the spacer 47 in the tube axis direction is appropriately set. When the length L is short, the spacers 47 are assembled to the two conductive paths 22 so as to be arranged intermittently. Moreover, when the length L is long, it is attached to the two conductive paths 22 so as to restrict contact continuously (the number and arrangement of the spacers 47 are not particularly limited). In addition, when the number of conductive paths 22 is three, it is sufficient to integrate another cylindrical portion 49 having a slit 48 .

The shape of the spacer 47 is not limited to that shown in FIG. For example, it may have a shape as shown in FIG.

<Regarding the configuration of the harness body 21 as another example>
In FIG. 8, a harness body 21, which is another example, includes three long conductive paths 22 and a shield member (not shown) that collectively covers the conductive paths 22. The shield member 23 in FIG. ), a spacer 50 for regulating contact between the three conductive paths 22, and an exterior member 24 (or an exterior member 37 in FIG. 4) through which the three conductive paths 22 are inserted together with the spacer 50. configured with Here, the spacer 50 is a feature of the invention.

<Regarding the spacer 50>
In FIG. 8, the spacer 50 is a resin molded product molded using a resin material having a lower thermal conductivity than the three conductive paths 22. They are arranged in the shape of a character and integrated. The length L of the spacer 50 in the tube axis direction is appropriately set. When the length L is short, the spacers 50 are assembled to the three conductive paths 22 so as to be arranged intermittently. Moreover, when the length L is long, it is attached to the three conductive paths 22 so as to continuously restrict contact. Note that the number and arrangement of the spacers 50 are not particularly limited.

<About the effect of the spacers 47 and 50>
In FIGS. 7 and 8, the spacers 47 and 50 are members for restricting contact between the plurality of conductive paths 22, so that they can reduce the influence of heat between the conductive paths 22. FIG.

<Overall effect>
As described above with reference to FIGS. 1 to 8, the exterior member 24 and the wire harness 9 according to one embodiment of the present invention have the effect of being able to provide high heat dissipation. Play.

It goes without saying that the present invention can be variously modified within the scope of the present invention.

DESCRIPTION OF SYMBOLS 1... Hybrid car 2... Engine 3... Motor unit 4... Inverter unit 5... Battery 6... Engine room 7... Rear part of car 8, 9... Wire harness 10... Intermediate part 11... Vehicle floor ( Mating fixing member) 12 Junction block 13 Harness terminal 14 Shield connector 15 Wire harness 16 Low voltage battery 17 Automobile front 18 Auxiliary device 19 Harness body 20 Connector DESCRIPTION OF SYMBOLS 21... Harness main body, 22... Conductive path, 23... Shield member, 24... Exterior member, 25... Conductor, 26... Insulator, 27... First exterior member, 28... Second exterior member, 29... First exterior main body, 30 Exterior fixing portion 31 Collar 32 Conductive path contact portion 33 Conductive path holding portion 34 Case 35 Cover 36 Second exterior main body 37 Exterior member 38 First exterior member , 39... Second exterior member, 40... Flexible tube portion, 41... Straight tube portion, 42... Mating fixing member, 43... Heat transfer member, 44... Inner surface, 45... Conductive path side contact portion, 46... Radial rib, 47 ...Spacer 48...Slit 49...Cylindrical portion 50...Spacer 51...Plate B...Bolt C...Clamp

Claims (6)

A first exterior main body made of resin through which one or more conductive paths are inserted, an exterior fixing portion provided outside the first exterior main body and fixed to a mating fixing member, and the first exterior main body. A conductive path contact portion provided in
The conductive path contact portion is a portion that is arranged on the inner side at a position where the conductive path can be contacted, is a portion that has a higher thermal conductivity than the first exterior main body, and extends to the exterior fixing portion. existing part ,
The first exterior body has a box-like shape including a bottom wall extending in the axial direction of the first exterior body and a pair of side walls rising from both side edges of the bottom wall and extending in the axial direction. ,
The conductive path contact portion extends in a direction crossing the axial direction so as to straddle the bottom wall and the pair of side walls, and extends from the pair of side walls to the exterior fixing portion.
An exterior member characterized by: In the exterior member according to claim 1,
A second exterior main body made of resin, which is continuous with one end and/or the other end in the axial direction of the first exterior main body and through which the conductive path is inserted, is provided, and the second exterior main body is compared with the first exterior main body. The outer member is a cylindrical portion having a longer length in the axial direction. A wire harness comprising: the exterior member according to claim 2; and one or a plurality of conductive paths inserted through the first exterior main body and the second exterior main body of the exterior member. In the wire harness according to claim 3,
a heat transfer member in contact with the inner surface of the second exterior main body and the outer surface of the conductive path to transfer the heat of the conductive path from the outer surface to the inner surface ;
The heat transfer member includes an annular conductive path-side contact portion that covers and contacts the outer surface of the conductive path; and a plurality of radial ribs contacting the inner surface.
A wire harness characterized by: In the wire harness according to claim 3 or 4,
A plurality of the conductive paths are provided, and spacers are provided for regulating contact between the plurality of conductive paths in the second exterior main body, and the spacers have a lower thermal conductivity than the plurality of conductive paths. A wire harness characterized by comprising: In the wire harness according to claim 3, 4 or 5,
A wire harness, wherein the exterior member is arranged and fixed under the floor of the vehicle as a mating fixing member.

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