JP2021136723A - Exterior member and wire harness - Google Patents

Abstract

To provide an exterior member which enables good heat radiation of electric wires.SOLUTION: An exterior member 33 includes: a flat-plate-like center cover 34 in which a flat surface of a first flat electric wire 31 makes surface contact with the front surface side and a flat surface of a second flat electric wire 32 makes surface contact with the rear surface side and which is formed of a metal; a front side cover 35 which covers the first electric wire 31 from the front side of the center cover 34; and a rear side cover 36 which covers the second electric wire 32 from the rear side of the center cover 34.SELECTED DRAWING: Figure 2

Description

The present disclosure relates to exterior members and wire harnesses.

Conventionally, as a wire harness used for a vehicle such as a hybrid vehicle or an electric vehicle, there is a wire harness that is exposed to the outside such as under the floor of the vehicle and distributed. As such a wire harness, for example, there is one provided with a plurality of electric wires and an exterior member having a plurality of accommodating portions for individually accommodating the electric wires (see, for example, Patent Document 1).

Japanese Unexamined Patent Publication No. 2005-44607

However, in the wire harness as described above, when viewed from the extending direction of the electric wire, the circular electric wire is accommodated in the quadrangular accommodating portion of the exterior member, and the contact area between the electric wire and the accommodating portion becomes small. There was a problem that the heat dissipation of the wire was poor.

The present invention has been made to solve the above problems, and an object of the present invention is to provide an exterior member and a wire harness that enable good heat dissipation of an electric wire.

The exterior member of the present disclosure includes a metal flat central cover whose front side surface is in surface contact with the flat surface of the flat first electric wire and whose back side surface is in surface contact with the flat surface of the flat second electric wire. A front side cover that covers the first electric wire from the front side of the central cover and a back side cover that covers the second electric wire from the back side of the central cover are provided.

The wire harness of the present disclosure includes the exterior member, the first electric wire, and the second electric wire.

According to the exterior member and the wire harness of the present disclosure, good heat dissipation of the electric wire is possible.

FIG. 1 is a schematic view of a vehicle according to an embodiment. FIG. 2 is a cross-sectional view of the wire harness according to the embodiment.

[Explanation of Embodiments of the present disclosure]
First, embodiments of the present disclosure will be listed and described.
The exterior members of the present disclosure are
[1] A metal flat central cover whose front side surface is in surface contact with the flat surface of the flat first electric wire and whose back side surface is in surface contact with the flat surface of the flat second electric wire, and the front side of the central cover. A front cover that covers the first electric wire and a back cover that covers the second electric wire from the back side of the central cover are provided.

According to the same configuration, since the flat center cover made of metal and the flat surface of the flat first electric wire is surface-contacted on the front side surface and the flat surface of the second electric wire is surface-contacted on the back surface is provided. Both the first electric wire and the second electric wire come into contact with the metal center cover in a wide range, and the heat dissipation of the first electric wire and the second electric wire becomes good.

[2] At least one of the front side cover and the back side cover abuts on the corresponding first electric wire or the second electric wire to sandwich the first electric wire or the second electric wire with the central cover. It is preferable to have.

According to the same configuration, at least one of the front side cover and the back side cover abuts on the corresponding first electric wire or the second electric wire and sandwiches the first electric wire or the second electric wire with the central cover. Since it has a contact portion, for example, a separate member for holding the first electric wire or the second electric wire in surface contact with the central cover becomes unnecessary.

[3] It is preferable that at least one of the front side cover and the back side cover having the contact portion is made of metal.
According to the same configuration, at least one of the front side cover and the back side cover having the contact portion is made of metal, so that the heat dissipation is further improved.

[4] The contact portion is preferably a flat contact portion that is in surface contact with the flat surface of the first electric wire or the flat surface of the second electric wire.
According to the same configuration, since the contact portion is a flat contact portion that is in surface contact with the flat surface of the first electric wire or the flat surface of the second electric wire, the heat dissipation is further improved.

[5] At least one of the front side cover and the back side cover bends from the contact flat portion and extends toward the center cover side to cover the side portion of the first electric wire or the second electric wire with the side portion. It is preferable to have side plate portions that are separated from each other.

According to the same configuration, at least one of the front side cover and the back side cover bends from the contact flat portion and extends toward the center cover side while covering the side portion of the first electric wire or the second electric wire. Since the side plate portion is separated from the side portion, the first electric wire or the second electric wire can be extended to the side plate portion side when sandwiched between the central cover and the contact flat portion.

[6] The central cover, the front side cover, and the back side cover preferably have a fastening portion to be fastened with a common fastening member.
According to the same configuration, since the central cover, the front side cover, and the back side cover have a fastening portion to be fastened by a common fastening member, for example, the number of fastening members can be reduced.

The wire harness of the present disclosure is
[7] The exterior member, the first electric wire, and the second electric wire are provided.
According to the same configuration, in the wire harness, the heat dissipation of the first electric wire and the second electric wire becomes good.

[Details of Embodiments of the present disclosure]
Specific examples of the wire harness of the present disclosure will be described below with reference to the drawings. It should be noted that the present invention is not limited to these examples, and is indicated by the scope of claims, and is intended to include all modifications within the meaning and scope equivalent to the scope of claims.

As shown in FIG. 1, the wire harness 10 electrically connects two or three or more electric devices (equipment), for example, a battery 11 arranged at the rear of the vehicle V and a vehicle. It is electrically connected to the electrical component 12 arranged at the front portion of the V. As the battery 11, a battery for high voltage capable of supplying a voltage of 100 volts or more and a battery for low voltage capable of supplying a voltage of 12 volts, 24 volts, or the like can be adopted. Further, when the high-voltage battery 11 is adopted, for example, an inverter connected to a wheel driving motor or the like can be adopted as the electric component 12. Further, when the low-voltage battery 11 is adopted, the electric component 12 can adopt, for example, a distribution box connected to each small motor. In the present embodiment, a case where a high-voltage battery 11 is adopted and a wire harness 10 corresponding to a large current is adopted will be described. The central portion of the wire harness 10 is arranged so as to pass under the floor of the vehicle V, and both end portions thereof stand up from under the floor and are connected to the battery 11 and the electric component 12 on the floor.

The wire harness 10 connects the central wire harness 21 that constitutes the wiring of the central portion under the floor, the end wire harness 22 that constitutes the wiring of both end portions, and the central wire harness 21 and the end wire harness 22. It includes a member 23.

As shown in FIG. 2, the central wire harness 21 includes a first electric wire 31, a second electric wire 32, and an exterior member 33. FIG. 2 is a cross-sectional view of the central wire harness 21 cut in a direction orthogonal to the extending direction of the central wire harness 21, and is a cross-sectional view of the central wire harness 21 cut in a direction orthogonal to the front-rear direction of the vehicle V. It is a figure. That is, the depth direction of the paper surface in FIG. 2 corresponds to the front-rear direction of the vehicle V, the left-right direction of FIG. 2 corresponds to the width direction of the vehicle V, and the vertical direction of FIG. 2 corresponds to the height direction of the vehicle V. ..

The first electric wire 31 and the second electric wire 32 have core wires 31a and 32a made of stranded wires and insulating coatings 31b and 32b that cover the outer surface of the core wires 31a and 32a. The first electric wire 31 and the second electric wire 32 each have a flat shape and a rectangular cross section. It should be noted that the cross section referred to here is not a rectangle in a strict sense, but includes a substantially rectangular shape such as a shape having rounded corners as shown in FIG.

The exterior member 33 includes a central cover 34, a front side cover 35, and a back side cover 36.
The central cover 34 is made of metal. The central cover 34 is an extruded material extruded in the extending direction. The central cover 34 is formed in a flat plate shape, and the flat surface of the first electric wire 31 is in surface contact with the front side surface, and the flat surface of the second electric wire 32 is in surface contact with the back surface surface. The flat surface of the first electric wire 31 and the second electric wire 32 is a surface corresponding to the long side in the rectangle of the cross section described above, and is wider than the side surface corresponding to the short side. The width of the central cover 34 is formed to be larger than the width of the first electric wire 31 and the second electric wire 32, and the central cover 34 has fastening portions 34a at both ends in the width direction.

The front cover 35 is made of metal. The front cover 35 is an extruded material extruded in the extending direction. The front side cover 35 covers the first electric wire 31 from the front side of the central cover 34. The front cover 35 has a contact flat portion 35a as a contact portion that comes into contact with the first electric wire 31 and sandwiches the first electric wire 31 with the central cover 34. The contact flat portion 35a is formed in a flat plate shape, and is a flat surface of the first electric wire 31. Specifically, the contact flat portion 35a is in surface contact with the flat surface on the side opposite to the side in which the central cover 34 is in surface contact. Further, the front cover 35 has a side plate portion 35b that bends from both sides of the contact flat portion 35a and extends toward the central cover 34 side while covering the side portion of the first electric wire 31 and separating from the side portion. The front side cover 35 is set so that the side plate portion 35b is separated from the side portion of the first electric wire 31 by forming the width of the contact flat portion 35a larger than the width of the first electric wire 31. Further, the front cover 35 has a fastening portion 35c extending outward in the width direction from the tip of the side plate portion 35b. The fastening portion 35c of the front cover 35 is provided at a position where it overlaps the fastening portion 34a of the central cover 34 in the vertical direction.

The back cover 36 is made of metal. The back cover 36 is an extruded material extruded in the extending direction. The back side cover 36 covers the second electric wire 32 from the back side of the central cover 34. The back side cover 36 has a contact flat portion 36a as a contact portion that contacts the second electric wire 32 and sandwiches the second electric wire 32 with the central cover 34. The contact flat portion 36a is formed in a flat plate shape, and is a flat surface of the second electric wire 32. Specifically, the contact flat portion 36a is in surface contact with the flat surface on the side opposite to the side in which the central cover 34 is in surface contact. Further, the back side cover 36 has a side plate portion 36b that bends from both sides of the contact flat portion 36a and extends toward the central cover 34 side while covering the side portion of the second electric wire 32 and separating from the side portion. The back side cover 36 is set so that the side plate portion 36b is separated from the side portion of the second electric wire 32 by forming the width of the contact flat portion 36a larger than the width of the second electric wire 32. Further, the back side cover 36 has a fastening portion 36c extending outward in the width direction from the tip of the side plate portion 36b. The fastening portion 36c of the back side cover 36 is provided at a position where it overlaps the fastening portion 34a of the central cover 34 in the vertical direction.

The central cover 34, the front cover 35, and the back cover 36 are fastened with bolts 37 and nuts 38 whose fastening portions 34a, 35c, and 36c are common fastening members. That is, the center cover 34, the front cover 35, and the back cover 36 are fixed by bolts 37 that penetrate the fastening portions 34a, 35c, and 36c and are screwed into the nut 38. Further, in the present embodiment, when the central cover 34, the front side cover 35, and the back side cover 36 are assembled, the first electric wire 31 and the second electric wire 32 are sandwiched between the central cover 34 and the contact flat portions 35a and 36a while being compressed. The dimensions of the first electric wire 31 and the second electric wire 32 before assembly are set so as to be used. That is, the heights of the first electric wire 31 and the second electric wire 32 in the state before being assembled, specifically, the length in the direction orthogonal to the flat surface, are the contact flat portions 35a and 36a with the central cover 34 in the assembled state. It is set slightly larger than the interval with. As a result, the flat surface of the first electric wire 31 and the second electric wire 32 comes into surface contact with the central cover 34 and the contact flat portions 35a and 36a.

Next, the operation of the wire harness 10 configured as described above will be described.
Since the central wire harness 21 in the wire harness 10 passes under the floor of the vehicle V and is exposed to the outside, there is a risk of foreign matter such as pebbles colliding with each other. Since the electric wire 32 is covered with the exterior member 33, its damage is prevented.

Next, the effects of the above embodiment will be described below.
(1) Since the flat central cover 34 made of metal and the flat surface of the flat first electric wire 31 is surface-contacted on the front side surface and the flat surface of the flat second electric wire 32 is surface-contacted on the back surface is provided. Both the first electric wire 31 and the second electric wire 32 come into contact with the metal central cover 34 in a wide range, and the heat dissipation of the first electric wire 31 and the second electric wire 32 becomes good. Further, since the first electric wire 31 and the second electric wire 32 have a flat shape, the height of the central wire harness 21 corresponding to the height direction of the vehicle V can be reduced. That is, for example, if the first electric wire 31 and the second electric wire 32 are round wires having a circular cross section, the height of the central wire harness 21 is greatly piled up, which makes it difficult to route to the vehicle V. It can be avoided.

(2) The front side cover 35 and the back side cover 36 serve as a contact portion that abuts on the corresponding first electric wire 31 or the second electric wire 32 and sandwiches the first electric wire 31 or the second electric wire 32 with the central cover 34. Since the contact flat portions 35a and 36a are provided, for example, a separate member for holding the first electric wire 31 and the second electric wire 32 in surface contact with the central cover 34 becomes unnecessary.

(3) Since the contact flat portions 35a and 36a are in surface contact with the flat surface of the first electric wire 31 or the flat surface of the second electric wire 32, the heat dissipation is further improved.
(4) Since the front side cover 35 and the back side cover 36 are made of metal, the heat dissipation is improved. Moreover, the electromagnetic shield effect can be obtained.

(5) The front side cover 35 and the back side cover 36 bend from the contact flat portions 35a and 36a and extend toward the central cover 34 side to cover the side portions of the first electric wire 31 or the second electric wire 32 and separate from the side portions. It has side plate portions 35b and 36b. Therefore, the first electric wire 31 and the second electric wire 32 can be extended to the side plate portions 35b and 36b when they are sandwiched between the central cover 34 and the contact flat portions 35a and 36a.

(6) Since the center cover 34, the front side cover 35, and the back side cover 36 have fastening portions 34a, 35c, and 36c to be fastened by the bolts 37 and nuts 38 which are common fastening members, for example, the number of fastening members may be increased. Can be reduced.

This embodiment can be modified and implemented as follows. The present embodiment and the following modified examples can be implemented in combination with each other within a technically consistent range.
-In the above embodiment, the front side cover 35 and the back side cover 36 are in contact with the corresponding first electric wire 31 or the second electric wire 32, and the first electric wire 31 or the second electric wire 32 is sandwiched between the central cover 34. Although it is assumed that the contact flat portions 35a and 36a are provided as the portions, the present invention is not limited to this, and other configurations may be used. For example, the front side cover 35 and the back side cover 36 do not have the contact flat portions 35a and 36a, and another member such as a binding band for holding the first electric wire 31 and the second electric wire 32 in surface contact with the central cover 34. It may be configured to include. Further, only one of the front side cover 35 and the back side cover 36 may have the contact flat portions 35a and 36a. Further, the contact portion is assumed to be contact flat portions 35a and 36a that are in surface contact with the flat surfaces of the first electric wire 31 and the second electric wire 32, but the present invention is not limited to this, and the first electric wire 31 and the second electric wire 31 and the second electric wire 32 are not limited to this. For example, it may be a contact portion that makes point contact without surface contact with the flat surface of the electric wire 32.

-In the above embodiment, the front side cover 35 and the back side cover 36 are made of metal, but the present invention is not limited to this, and the front side cover 35 and the back side cover 36 may be made of resin, for example.
-In the above embodiment, the side plate portions 35b, 36b of the front side cover 35 and the back side cover 36 are configured to be separated from the side portions of the first electric wire 31 or the second electric wire 32, but the present invention is not limited to this, and the first electric wire is not limited to this. It may be configured to come into contact with the side portion of the 31 or the second electric wire 32.

-In the above embodiment, the central cover 34, the front side cover 35, and the back side cover 36 have fastening portions 34a, 35c, and 36c to be fastened with bolts 37 and nuts 38, which are common fastening members. It is not limited, and may be fixed in other configurations.

-In the above embodiment, the wire harness 10 corresponds to a large current when the high voltage battery 11 is adopted, but the present invention is not limited to this, and the wire harness when the low voltage battery 11 is adopted. May be.

-In the above embodiment, the first electric wire 31 and the second electric wire 32 have core wires 31a and 32a made of stranded wires, but may have core wires made of a single wire such as a bus bar.

10 Wire harness 11 Battery 12 Electrical parts 21 Central wire harness 22 End wire harness 23 Connecting member 31 First wire 31a Core wire 31b Insulation coating 32 Second wire 32a Core wire 32b Insulation coating 33 Exterior member 34 Center cover 34a Fastening part 35 Front side cover 35a Contact flat part (contact part)
35b Side plate part 35c Fastening part 36 Back side cover 36a Contact flat part (contact part)
36b Side plate part 36c Fastening part 37 Bolt (fastening member)
38 nut (fastening member)
V vehicle

Claims (7)

A metal flat center cover with a flat surface contact of the flat surface of the first electric wire on the front side surface and a flat surface contact of the flat surface of the second electric wire on the back surface surface.
From the front side of the center cover to the front side cover that covers the first electric wire,
An exterior member including a back side cover that covers the second electric wire from the back side of the central cover. Claim that at least one of the front side cover and the back side cover has an abutting portion that abuts on the corresponding first electric wire or the second electric wire and sandwiches the first electric wire or the second electric wire with the central cover. The exterior member according to 1. The exterior member according to claim 2, wherein at least one of the front side cover and the back side cover having the contact portion is made of metal. The exterior member according to claim 2 or 3, wherein the contact portion is a flat contact portion that comes into surface contact with the flat surface of the first electric wire or the flat surface of the second electric wire. At least one of the front side cover and the back side cover is a side plate that bends from the contact flat portion and extends toward the central cover side to cover the side portion of the first electric wire or the second electric wire and separate from the side portion. The exterior member according to claim 4, which has a portion. The exterior member according to any one of claims 1 to 5, wherein the central cover, the front cover, and the back cover have a fastening portion to be fastened with a common fastening member. A wire harness including the exterior member according to any one of claims 1 to 6, the first electric wire, and the second electric wire.

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