JP2017135042A - Wire Harness - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a technique capable of cooling as many electric wires as possible even when there are a great number of electric wires.SOLUTION: A wire harness 10 includes: a plurality of electric wires 12; an exterior member 50 that covers periphery of the plurality of electric wires 12; and a heat radiation member 20. The heat radiation member 20 includes an electric wire heat exchange part 22 which is capable of exchanging heat with the electric wires 12 while being disposed along the electric wires 12 by abutting against the plurality of electric wires 12 inside the exterior member 50, and the heat radiation member is provided to extend toward outer side of the exterior member 50. The electric wire heat exchange part 22 includes: a main body 24; and a plurality of projected parts 28 formed to extend along the main body 24 while being projected radially from the periphery of the main body 24 toward outer side.SELECTED DRAWING: Figure 2

Description

  The present invention relates to a technique for cooling an electric wire.

  Patent Document 1 discloses a technique for cooling an electric wire accommodated in a shield tube by arranging a cooling tube along the electric wire in the shield tube.

JP2015-159694A

  However, in the technique described in Patent Document 1, since a cylindrical cooling pipe is arranged, when the number of electric wires increases, there is a risk that the number of electric wires that cannot contact the cooling pipes increases and sufficient cooling cannot be performed. is there.

  Then, an object of this invention is to provide the technique which can cool more electric wires, even when the number of electric wires increases.

  In order to solve the above-described problem, a wire harness according to a first aspect includes a plurality of electric wires, an exterior member that covers the periphery of the plurality of electric wires, a main body, and a radially protruding outward from the periphery of the main body. A plurality of protrusions formed so as to extend along the main body, and are arranged along the electric wires in a manner of coming into contact with the plurality of electric wires inside the exterior member. A heat radiating member including a replaceable electric wire heat exchanging portion and extending to the outside of the exterior member.

  The wire harness which concerns on a 2nd aspect is a wire harness which concerns on a 1st aspect, Comprising: The 3 or more said protrusion part which has the same protrusion dimension is formed in the circumferential direction of the said main-body part at equal intervals. .

  The wire harness which concerns on a 3rd aspect is a wire harness which concerns on the 1st or 2nd aspect, Comprising: A through-hole is formed in the said main-body part along the extension direction of the said main-body part, The said through-hole In addition, a cooling member for exchanging heat with the main body is passed.

  The wire harness which concerns on a 4th aspect is a wire harness which concerns on a 3rd aspect, Comprising: The fluid is let the said through-hole pass as the said member for cooling.

  The wire harness which concerns on a 5th aspect is a wire harness which concerns on a 3rd aspect, Comprising: The linear member whose heat conductivity is higher than the said electric wire heat exchange part as the said cooling member is passed through the said through-hole. ing.

  The wire harness which concerns on a 6th aspect is a wire harness which concerns on the 1st or 2nd aspect, Comprising: The said heat radiating member is formed integrally with the said electric wire heat exchange part, At least one of the said electric wire heat exchange part It further includes an external extension that extends to the outside of the exterior member.

  According to the first to sixth aspects, since the plurality of protrusions are formed radially on the heat dissipation member inside the exterior member, the surface area of the heat dissipation member that can come into contact with the electric wire is increased. Thereby, the number of the electric wires which contact the heat radiating member increases, and more electric wires can be cooled.

  In particular, according to the second aspect, the shape of the wire harness can be easily formed in a circular shape. Further, since the electric wires are equally divided and easily arranged, temperature unevenness hardly occurs when the heat generated in the electric wires is approximately the same.

  In particular, according to the third aspect, the electric wire can be more efficiently cooled by the cooling member passed through the through hole. As the cooling member, the existing pipe, washer liquid, radiator liquid, or the like can be used to cool the electric wire.

  In particular, according to the fourth aspect, the electric wire can be cooled using, for example, a washer liquid or a radiator liquid as the fluid.

  In particular, according to the fifth aspect, the electric wire can be cooled using the linear member. At this time, since the linear member has a higher thermal conductivity than the electric wire heat exchanger, the electric wire can be cooled more efficiently by cooling the linear member outside.

  In particular, according to the 6th aspect, heat exchange and heat dissipation with an electric wire can be performed with one member.

It is a top view which shows the wire harness which concerns on 1st Embodiment. It is sectional drawing cut | disconnected along the II-II line | wire of FIG. It is an exploded top view showing the wire harness concerning a 1st embodiment. It is a front view which shows the modification of the member for cooling. It is a front view which shows the modification of the member for thermal radiation. It is sectional drawing which shows the wire harness which concerns on 2nd Embodiment. It is a disassembled plan view which shows the wire harness which concerns on 2nd Embodiment.

{First embodiment}
Hereinafter, the wire harness according to the first embodiment will be described. FIG. 1 is a plan view showing a wire harness 10 according to the first embodiment. 2 is a cross-sectional view taken along the line II-II in FIG. FIG. 3 is an exploded plan view showing the wire harness 10 according to the first embodiment.

  The wire harness 10 according to the first embodiment includes a plurality of electric wires 12, an exterior member 50, and a heat dissipation member 20.

  The electric wire 12 includes a core wire and a coating formed around the core wire. The core wire is formed in a linear shape from a conductive material such as copper, copper alloy, aluminum, or aluminum alloy. Here, the core wire has a configuration in which a plurality of strands are twisted together. But the core wire may be comprised with the single wire. The coating is formed by extruding an insulating resin material around the core wire by an extrusion device or the like. A connector 14 or the like is connected to the end of the electric wire 12. The electric wire 12 is connected to various electric devices mounted on the vehicle or the like via the connector 14 or the like in a state where the electric wire 12 is arranged at an arrangement target location of the vehicle or the like. And it is used as what electrically connects various electric equipments.

  The exterior member 50 covers the periphery of the plurality of electric wires 12. The exterior member 50 is a member that performs bundling, path regulation, protection, or the like of the electric wires 12. As such an exterior member 50, for example, a tape 52, a corrugated tube or a protector can be considered. Here, the description will be made assuming that the tape 52 is spirally wound around the wire 12 to form the exterior member 50.

  The heat radiating member 20 is a member that exchanges heat with the electric wires 12 inside the exterior member 50. The heat radiating member 20 is provided so as to extend to the outside of the exterior member 50. Thereby, the heat radiating member 20 can release the heat received from the electric wire 12 to the outside. Specifically, the heat radiating member 20 includes an electric wire heat exchanging portion 22. Furthermore, here, the heat dissipation member 20 includes a cooling member 30.

  The electric wire heat exchange unit 22 is disposed along the electric wire 12 inside the exterior member 50. The wire heat exchanging portion 22 is in contact with the plurality of wires 12 inside the exterior member 50. Thereby, the wire heat exchanging unit 22 can exchange heat with the wire 12. The electric wire heat exchange part 22 is formed, for example with resin or rubber | gum. The thermal conductivity of the resin or rubber is preferably 0.4 watts per meter or Kelvin or more. Examples of such a material include polyethylene. Specifically, the wire heat exchange unit 22 includes a main body 24 and a plurality of protrusions 28.

  The main body portion 24 is a portion that extends along the electric wire 12. The main body portion 24 is a portion that hits the axial center of the ridge portion 28.

  The plurality of protrusions 28 are formed to extend along the main body 24 while projecting radially outward from the periphery of the main body 24. The protruding portion 28 is formed in a triangular prism shape in which the height direction connecting both main surfaces is along the extending direction of the main body portion 24. One side surface of the ridge portion 28 is continuous with the main body portion 24. The remaining two sides face outward. Accordingly, here, the protruding portion 28 is formed in a shape that gradually narrows from the proximal end side connected to the main body portion 24 toward the distal end side. A part of the plurality of electric wires 12 is in contact with two side surfaces intersecting at the tip side of the ridge 28.

  Here, three or more ridges 28 having the same protruding dimension are formed at equal intervals in the circumferential direction of the main body 24. In the example shown in FIG. 2, five ridges 28 are formed at equal intervals in the circumferential direction of the main body 24. The five protrusions 28 are formed in the same shape, and the figure connecting the tips is a regular pentagon. Thereby, the surface area of the protrusion part 28 can be enlarged, making it easy to bundle the wire harness 10 circularly. Moreover, since the electric wires 12 are equally divided and easily arranged, temperature unevenness hardly occurs when the heat generated in the electric wires 12 is approximately the same.

  Here, in the electric wire heat exchanging portion 22, the tips of the protrusions 28 reach the vicinity of the exterior member 50. Thus, the space through which the electric wire 12 passes is partitioned by each protrusion 28 and the exterior member 50. But the electric wire 12 may be distribute | arranged between the front-end | tip of the protrusion 28 and the exterior member 50, without the front-end | tip of each protrusion 28 reaching the exterior member 50 vicinity.

  Further, here, the main body portion 24 is formed with a through hole 26 extending along the extending direction of the main body portion 24. A cooling member 30 is passed through the through hole 26. The cooling member 30 is a member that performs heat exchange with the main body 24. Here, a fluid is passed through the through hole 26 as the cooling member 30. By allowing the fluid to pass through the through hole 26, the electric wire 12 can be stably cooled via the electric wire heat exchange unit 22. The fluid may be a liquid or a gas.

  At this time, a tubular member 32 through which the fluid flows is passed through the through-hole 26. As a combination of such a fluid and the tubular member 32, for example, a washer tube for passing a washer liquid and a washer liquid, or a radiator tube for passing a radiator liquid and a radiator liquid can be considered. When a circulating fluid such as a radiator liquid is passed as the fluid, a fluid having a relatively low temperature is stably supplied. Even when a non-circulating fluid such as a washer fluid is passed as the fluid, when the fluid flows frequently, a fluid having a relatively low temperature is stably supplied. Further, even when a non-circulating fluid such as a washer fluid is passed as the fluid and the fluid does not flow frequently, the portion of the tubular member 32 that extends outside the exterior member 50 is air-cooled or the like. If so, it is considered that the electric wire 12 can be sufficiently cooled.

  Here, the tubular member 32 extends outward from an intermediate portion of the wire harness 10. Here, the tubular member 32 extends from both end portions of the electric wire heat exchanging portion 22. When the tubular member 32 is, for example, a washer tube, it is conceivable that one end of the tubular member 32 is connected to a washer tank and the other end is connected to a washer nozzle. Moreover, when the tubular member 32 is a radiator tube, for example, it is conceivable that both ends thereof are connected to each member positioned on the circulation path of the radiator liquid, such as a radiator, a circulation pump, or a reservoir tank.

  However, it may be provided so that the fluid flows directly through the through hole 26. In this case, it is conceivable that the main body 24 is connected to a tubular member that allows fluid to flow, such as the washer tube or the radiator tube. In this case, a connecting portion that can be connected to the tubular member is preferably provided at the end of the main body portion 24. As such a connection structure, a connecting cylinder part having an outer diameter slightly larger than the inner diameter of the tube-shaped member is provided in communication with the through hole 26 at the end of the main body part 24, and the tube-shaped member is provided in the connection cylinder part. It is conceivable that they are externally fitted in an expanded state. The connection position between the tubular member and the main body 24 may be inside the exterior member 50 or outside the exterior member 50.

  Moreover, it is preferable that the electric wire heat exchange part 22 is formed so that bending is possible with the material which has a softness | flexibility. Thereby, the electric wire heat exchange part 22 can be arrange | positioned also in the part by which the electric wire 12 is bent and arrange | positioned.

  However, when fluid is passed through the through hole 26, the wire heat exchanging portion 22 may be provided in a portion of the wire 12 along a linear path as much as possible or a gently curved portion. Thereby, when the electric wire heat exchange part 22 bends according to the path | route of the electric wire 12, it can suppress that the path | route which a fluid passes due to the electric wire heat exchange part 22 bending is narrowed.

  According to such a wire harness 10, since the plurality of protrusions 28 are formed radially on the heat radiating member 20 inside the exterior member 50, the surface area of the heat radiating member 20 that can come into contact with the electric wires 12 is increased. . Thereby, the number of the electric wires 12 which contact the heat radiating member 20 increases, and more electric wires 12 can be cooled.

  Conventionally, when an electric wire passes through a path close to a heat source, it has been necessary to take measures such as imparting heat resistance to the electric wire itself or attaching a heat shielding exterior member around the electric wire. On the other hand, when these countermeasures are difficult, it has been necessary to take a countermeasure such as making the arrangement route of the electric wire a detour route so as to avoid the heat source. However, in the wire harness 10 according to the present embodiment, by cooling the electric wire 12, the above-described measures are not necessary, so that cost reduction or weight reduction can be achieved.

  In addition, since the three or more protrusions 28 having the same protruding dimension are formed at equal intervals in the circumferential direction of the main body 24, the shape of the wire harness 10 can be easily formed in a circular shape. Moreover, since the electric wires 12 are equally divided and easily arranged, temperature unevenness hardly occurs when the heat generated in the electric wires 12 is approximately the same.

  A through hole 26 is formed in the main body 24, and the cooling member 30 is passed through the through hole 26. As the cooling member 30, the electric wire 12 can be cooled using an existing pipe, washer liquid, radiator liquid, or the like.

{Modification of the first embodiment}
In the first embodiment, the fluid is passed through the through hole 26, but this is not essential. As the cooling member 30A in the heat dissipating member 20A, as shown in FIG. 4, it is conceivable that a linear member 34 other than the tubular member through which the fluid passes is passed. As the linear member 34, it is conceivable that the thermal conductivity is higher than that of the electric wire heat exchange unit 22. Thereby, the electric wire 12 can be cooled more effectively by cooling the linear member 34 outside. In this case, FIG. 4 shows an example in which the linear member 34 is solid, but the linear member 34 may be hollow.

  Further, it is conceivable that the linear member 34 is formed to have higher flexibility than the electric wire heat exchange unit 22. For example, the linear member 34 is formed of a material that is more flexible than the electric wire heat exchange unit 22 or is formed in a shape that is easily deformed, such as a circular cross section, so that the electric wire heat exchange unit More flexible than 22. In this case, since the flexibility of the linear member 34 is high, it is easy to dispose the linear member 34 at a position where air cooling or the vicinity of the front grill is easy to cool.

  When the cooling member 30 is passed through the through-hole 26 and no fluid is directly passed through the through-hole 26, the outer surface of the wire heat-exchange unit 22B is passed from the through-hole 26 to the wire heat-exchange unit 22B of the heat dissipation member 20B. It is conceivable that a slit 24h extending toward is formed. Thereby, as shown in FIG. 5, the cooling member 30 can be passed through the through hole 26 by splitting the electric wire heat exchanging portion 22 </ b> B from the slit 24 h. In addition, the cooling member 30 can be formed to be the same as or larger than the through hole 26 so that the cooling member 30 and the main body 24 can be more closely attached.

  Moreover, in 1st Embodiment, the electric wire heat exchange part 22 is provided in a part of path | route of a wire harness, and the tubular member 32 demonstrates as what extends outside the path | route of the wire harness 10 in the intermediate part of the wire harness 10. FIG. However, this is not essential. For example, the wire heat exchange part may be provided up to at least one end of the wire harness, and the tubular member may extend outward at one end of the wire harness.

{Second Embodiment}
A wire harness according to the second embodiment will be described. FIG. 6 is a cross-sectional view showing a wire harness 10C according to the second embodiment. FIG. 7 is an exploded plan view showing a wire harness 10C according to the second embodiment. In the description of the present embodiment, the same components as those described above are denoted by the same reference numerals, and the description thereof is omitted.

  The wire harness 10C according to the second embodiment is different from the wire harness 10 according to the first embodiment in that the heat dissipating member 20C is composed of one member.

  Specifically, the heat dissipation member 20C further includes an external extension 40 in addition to the electric wire heat exchange part 22C.

  Here, no through-hole is formed in the main body portion 24C of the wire heat exchanging portion 22C. And the external extension part 40 is integrally formed with the electric wire heat exchange part 22C. The external extension portion 40C is connected to at least one end of the wire heat exchange portion 22C and extends to the outside of the exterior member 50.

  In the example shown in FIG. 7, the external extension portion 40 is formed in the same shape as the electric wire heat exchange portion 22C. Thereby, after forming a member having a cross-sectional shape in the shape of the electric wire heat exchanging portion 22C into an elongated shape by extrusion molding or the like, the heat radiating member 20C can be continuously manufactured by cutting to a desired length. it can.

  But the external extension part 40 may be formed in the shape different from 22C of electric wire heat exchange parts. When the external extension part is formed in a shape different from that of the electric wire heat exchange part 22C, for example, the external extension part may be formed in a linear shape with a circular cross section. Thereby, the flexibility of the external extension part is higher than that of the electric wire heat exchange part 22C, and it becomes easy to dispose the external extension part at a position where air cooling or the vicinity of the front grill is easily cooled.

  According to such a wire harness 10C, heat exchange and heat dissipation with the electric wire 12 can be performed with one member.

{Other variations}
In each of the embodiments, the five protrusions 28 are described as being formed at equal intervals, but this is not essential. Five ridges may be formed at different intervals. In this case, the electric wire arrange | positioned in a part with a narrow space | interval can be cooled more effectively.

  Further, in each embodiment, the five protrusions 28 are described as being formed in the same shape, but this is not essential. A part of the five protrusions may be formed large (for example, wide). In this case, when viewed locally, the heat capacity of the projecting ridge portion formed larger is increased, and the electric wire in contact with the projecting ridge portion can be cooled more effectively.

  From the above viewpoint, for example, it is conceivable to enlarge a pair of ridges having a narrow interval between the ridges formed at different intervals. And in the electric wire which comprises a wire harness, when the electric wire which becomes easy to become high temperature compared with others exists, it is possible to arrange | position the electric wire which becomes easy to become the said high temperature in the part with a narrow space | interval. Thereby, the electric wire which tends to become high temperature can be cooled more effectively.

  In addition, each structure demonstrated by said each embodiment and each modification can be suitably combined unless it mutually contradicts.

  As described above, the present invention has been described in detail. However, the above description is illustrative in all aspects, and the present invention is not limited thereto. It is understood that countless variations that are not illustrated can be envisaged without departing from the scope of the present invention.

DESCRIPTION OF SYMBOLS 10 Wire harness 12 Electric wire 20 Heat radiating member 22 Electric wire heat exchange part 24 Main body part 24h Slit 26 Through-hole 28 Projection part 30 Cooling member 32 Tubular member 34 Linear member 40 External extension part 50 Exterior member 52 Tape

Claims (6)

Multiple wires,
An exterior member covering the periphery of the plurality of electric wires;
A main body, and a plurality of protrusions formed to extend along the main body while projecting radially outward from the periphery of the main body. A heat dissipating member provided so as to extend to the outside of the exterior member, including an electric wire heat exchanging portion that is disposed along the electric wire and capable of exchanging heat with the electric wire.
A wire harness comprising: The wire harness according to claim 1,
A wire harness in which three or more ridges having the same protruding dimension are formed at equal intervals in the circumferential direction of the main body. The wire harness according to claim 1 or 2,
A through hole is formed in the main body portion along the extending direction of the main body portion,
A wire harness in which a cooling member that exchanges heat with the main body is passed through the through hole. The wire harness according to claim 3,
A wire harness in which a fluid is passed through the through hole as the cooling member. The wire harness according to claim 3,
The wire harness by which the linear member whose heat conductivity is higher than the said electric wire heat exchange part as the said member for cooling is penetrated by the said through-hole. The wire harness according to claim 1 or 2,
The said heat radiating member is a wire harness which is formed integrally with the said electric wire heat exchange part, and is further connected to the at least one edge part of the said electric wire heat exchange part, and further includes the external extension part extended to the exterior of the said exterior member.

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