JP2020062901A - Wiring harness and exterior member - Google Patents

Abstract

To provide a wiring harness which can protect an electric wire member very well.SOLUTION: A wiring harness 10 comprises an electric wire member 20, and a protector 26 through which the electric wire member 20 is inserted. There are provided on the protector 26 an opening 30 which is opened in a direction orthogonally intersected with an extending direction of the electric wire member 20 and a discharge part 33 of a labyrinth structure which communicates the opening 30 with the outside by including first and second passage pieces 31, 32 which extend in a reverse direction alternately.SELECTED DRAWING: Figure 2

Description

  The present invention relates to a wire harness and an exterior member.

  BACKGROUND ART Conventionally, as a wire harness used in a vehicle such as a hybrid vehicle or an electric vehicle, a wire harness in which an outer side of an electric wire member is covered with an exterior member such as a corrugated tube or a resin pipe is known. Since such a wire harness may be routed under the floor of the vehicle or the like and exposed to the outside, it is covered with various exterior members, and a foam member is interposed between the exterior members to form an exterior member and an electric wire member. There has been an attempt to prevent a foreign matter such as sand from entering between and (for example, refer to Patent Document 1). With such a configuration, it is possible to reduce the possibility that the electric wire member will be rubbed against a foreign matter such as sand for a long period of time and damaged.

JP, 2016-201336, A

  However, as described above, in a configuration in which a foreign material such as sand is prevented from entering between the exterior member and the electric wire member by using another member such as a foam member, the configuration becomes complicated and the number of parts and the number of assembly steps increase. This leads to an increase in cost. Even if such a prevention structure is adopted, foreign matter such as sand may still enter between the exterior member and the electric wire member, and even in such a case, a wire harness in which the electric wire member is not easily damaged is required. ing.

  The present invention has been made to solve the above problems, and an object thereof is to provide a wire harness and an exterior member that can favorably protect an electric wire member.

  A wire harness that solves the above problem is a wire harness that includes an electric wire member and an exterior member through which the electric wire member is inserted, and is fixed to a vehicle, wherein the exterior member has an extending direction of the electric wire member. An opening opening in the orthogonal direction and a discharge part of a maze structure having at least two passage pieces alternately extending in opposite directions and communicating the opening with the outside.

  According to this configuration, the exterior member has an opening portion opened in a direction orthogonal to the extending direction of the electric wire member and at least two passage pieces alternately extending in opposite directions to form the opening portion and the outside. Since the discharge portion having the labyrinth structure communicating with each other is provided, it is possible to discharge the foreign matter that has entered between the outer casing member and the electric wire member while having a structure in which the foreign matter does not easily enter the inside of the outer casing member from the discharge portion. Therefore, it is possible to prevent the electric wire member from being rubbed against a foreign substance such as sand for a long period of time and scratched, and the electric wire member can be well protected.

In the wire harness, it is preferable that at least one of the passage pieces extends in a state of being fixed to the vehicle while being inclined in a gravity direction.
According to this configuration, at least one of the passage pieces is inclined and extended in the direction of gravity in a state of being fixed to the vehicle, so that the foreign matter is easily discharged to the outside.

In the wire harness, it is preferable that a chamfered portion is formed at an end of the opening on the electric wire member side.
According to this structure, since the chamfered portion is formed at the end of the opening on the side of the electric wire member, the electric wire member is prevented from being scratched and scratched at the end of the opening on the side of the electric wire member.

In the wire harness, it is preferable that the opening is formed smaller than a range of an inner surface of the discharging portion on an outer surface of the exterior member.
According to this structure, since the opening is formed smaller than the range of the inner surface of the discharging portion on the outer surface of the outer covering member, foreign matter such as sand enters the inside of the outer covering member from inside the discharging portion through the opening. It will be difficult.

In the above wire harness, it is preferable that a door portion is provided in the discharging portion to open the discharging portion by an external force directed from the opening side toward the outside.
According to this structure, the discharge portion is provided with the door portion that opens the discharge portion by the external force from the opening side toward the outside. Only when an external force directed to the side is applied, the open state is set and foreign matter such as sand can be discharged. In addition, in a closed state when no external force is applied to the door portion from the opening side to the outside, foreign matter such as sand is prevented from entering from the outside to the opening side.

In the above wire harness, it is preferable that an external opening opening to the outside of the discharging section opens in the direction of gravity in a state of being fixed to the vehicle.
According to this structure, the external opening that opens to the outside of the discharging portion is opened toward the direction of gravity while being fixed to the vehicle, so that foreign matter flying in from the horizontal direction does not enter the discharging portion.

  An exterior member that solves the above problem is an exterior member through which an electric wire member is inserted, and an opening portion that is opened in a direction orthogonal to the extending direction of the electric wire member and at least two passages that alternately extend in opposite directions. A labyrinth-shaped discharge portion that has a piece and communicates the opening portion with the outside is provided.

  According to the configuration, the maze structure having an opening opening in a direction orthogonal to the extending direction of the electric wire member and at least two passage pieces alternately extending in opposite directions to communicate the opening with the outside is provided. Since the discharge section is provided, the foreign matter entering between the exterior member and the electric wire member can be discharged while the foreign matter does not easily enter the exterior member from the discharge section. Therefore, it is possible to prevent the electric wire member from being rubbed against a foreign substance such as sand for a long period of time and scratched, and the electric wire member can be well protected.

  According to the wire harness and the exterior member of the present invention, the electric wire member can be well protected.

The schematic structure figure showing the wire harness of one embodiment. The partial cross section figure of the wire harness of one embodiment. The partial cross section figure of the wire harness of another example. The partial cross section figure of the wire harness of another example. The partial cross section figure of the wire harness of another example. The schematic block diagram which shows the wire harness of another example.

  Hereinafter, an embodiment of the wire harness will be described with reference to FIGS. 1 and 2. In addition, in each drawing, for convenience of description, a part of the configuration may be exaggerated or simplified. Also, the dimensional ratio of each part may be different from the actual one.

  As shown in FIG. 1, the wire harness 10 electrically connects two or more electric devices (devices), and is installed in the front part of a vehicle V such as a hybrid vehicle or an electric vehicle, for example. The connected inverter 11 is electrically connected to the high voltage battery 12 installed behind the vehicle V with respect to the inverter 11. The wire harness 10 is arranged, for example, so as to pass under the floor of the vehicle V, one end thereof is connected to the inverter 11 via the connector C1, and the other end thereof is connected to the high-voltage battery 12 via the connector C1. The inverter 11 is connected to a wheel driving motor (not shown) that serves as a power source for driving the vehicle. The inverter 11 generates AC power from the DC power of the high voltage battery 12 and supplies the AC power to the motor. The high voltage battery 12 is, for example, a battery that can supply a voltage of 100 volts or more.

  As illustrated in FIG. 2, the wire harness 10 includes an electric wire member 20, and the electric wire member 20 includes a plurality of core wires 21 and an insulating coating 22 that covers the outer periphery of the core wires 21 (two wires in the present embodiment). ), And a braid member 24 that surrounds the outer periphery of the electric wire 23 and is an electromagnetic shield member in which a plurality of metal element wires are knitted. An aluminum-based metal material is used as the material of the metal element wires constituting the braided member 24 of the present embodiment.

  Further, as shown in FIG. 1, the wire harness 10 includes a metal pipe 25 as various exterior members through which the electric wire member 20 is inserted, a protector 26, and a corrugated tube 27. The metal pipe 25 is provided so as to extend from the high-voltage battery 12 and cover the electric wire member 20 arranged under the floor of the vehicle V. The protector 26 is provided so as to cover the bent portion of the electric wire member 20 closer to the inverter 11 than the metal pipe 25. The corrugated tube 27 is provided so as to cover the electric wire member 20 between the protector 26 and the inverter 11.

  Then, as shown in FIG. 2, in the protector 26, an opening 30 opened in a direction orthogonal to the extending direction of the electric wire member 20 and first and second passage pieces 31, which alternately extend in opposite directions, are provided. A discharge part 33 having a labyrinth structure, which has 32 and communicates the opening 30 with the outside, is provided.

  Specifically, first, the opening 30 is fixed to the vehicle V and opens from the bottom of the protector 26 in the direction of gravity (downward in FIG. 2). The discharge portion 33 includes a rear extension portion 34 that extends slightly downward from an end portion of the opening portion 30 on the vehicle rear side (right side in FIG. 2), and a vehicle front side from a tip of the rear extension portion 34. The first passage piece 31 extends to the left (in FIG. 2, left side). The discharge portion 33 includes a front extension portion 35 extending downward from an end portion of the opening portion 30 on the vehicle front side (left side in FIG. 2), and a vehicle rear side from a tip of the front extension portion 35 (FIG. 2, and the second passage piece 32 extending to the right side). The second passage piece 32 is arranged below the first passage piece 31 and constitutes a maze structure together with the first passage piece 31. Further, the discharge portion 33 extends downward from both ends of the opening portion 30 in the vehicle width direction (the direction orthogonal to the paper surface in FIG. 2) and closes side walls of the first and second passage pieces 31 and 32. Has 36. Further, the first and second passage pieces 31 and 32 of the present embodiment respectively extend while being inclined in the direction of gravity while being fixed to the vehicle. Further, a chamfered portion 37 having an R-shaped cross section is formed at the end of the opening 30 of the present embodiment on the electric wire member 20 side.

  In addition, a space between one end of the protector 26 and the electric wire member 20 led out from the one end is closed by a tape 38 wound around the outer circumference of the one end of the protector 26 and the outer circumference of the electric wire member 20. There is.

Next, the operation of the wire harness 10 configured as above will be described.
For example, while the vehicle V is traveling, foreign matter such as sand on the ground may be splashed and hung on the wire harness 10 due to splashing by a rotating tire and traveling wind. Then, although foreign matter such as sand may enter between the protector 26 and the electric wire member 20 through some route, the foreign matter mainly falls from the opening portion 30 onto the first passage piece 31 below, and further falls. The first passage piece 31 falls between the front end portion and the front extension portion 35 onto the second passage piece 32 below, and is further discharged from the front end portion of the second passage piece 32 to the outside.

Next, the effects of the above embodiment will be described below.
(1) The protector 26 has an opening 30 that opens in a direction orthogonal to the extending direction of the electric wire member 20 and first and second passage pieces 31 and 32 that alternately extend in opposite directions. A maze structure discharge part 33 that communicates the part 30 with the outside is provided. Therefore, it is possible to discharge the foreign matter that has entered between the protector 26 and the electric wire member 20, while having a structure in which the foreign matter such as sand hardly enters the protector 26 from the discharge portion 33. Therefore, it is possible to prevent the electric wire member 20 from being rubbed against a foreign matter such as sand for a long period of time and scratched, and the electric wire member 20 can be well protected.

(2) Since the first and second passage pieces 31 and 32 are each fixed to the vehicle and extend while inclining in the direction of gravity, foreign matter such as sand is easily discharged to the outside.
(3) Since the chamfered portion 37 is formed at the end of the opening 30 on the electric wire member 20 side, the electric wire member 20 is prevented from being scratched and scratched by the end of the opening 30 on the electric wire member 20 side. .

The present 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-described embodiment, the rear extending portion 34 of the discharge portion 33 extends downward from the vehicle rear end of the opening 30, and the front extending portion 35 extends downward from the vehicle front end of the opening 30. Although it is supposed to extend, it is not limited to this and may be changed. That is, in the above embodiment, the range of the opening 30 and the range of the inner surface of the discharge portion 33 on the outer surface of the protector 26 are configured to be the same, but the opening portion is formed on the outer surface of the protector 26. It may be formed smaller than the range of the inner surface of the.

  Specifically, for example, it may be changed as shown in FIG. In this example, the width of the opening 40 in the front-rear direction is smaller than the distance between the rear extending portion 34 and the front extending portion 35 in the front-rear direction, and the opening 40 is the inner surface of the discharge portion 33 on the outer surface of the protector 26. Is formed smaller than the range. In this example, the opening 40 is formed at the center of the outer surface of the protector 26 in the front-rear direction of the inner surface of the discharge portion 33.

  This makes it difficult for foreign matter such as sand to enter the inside of the protector 26 from the inside of the discharge portion 33 through the opening 40. For example, when foreign matter such as sand that has entered between the protector 26 and the electric wire member 20 falls from the opening 40 to the discharge portion 33, the foreign matter flows back through the opening 40 between the protector 26 and the electric wire member 20. Hard to do.

-The discharge part 33 of the above-mentioned embodiment may be provided with a door part which opens the discharge part 33 by an external force directed from the openings 30, 40 to the outside.
Specifically, for example, it may be changed as shown in FIG. In this example, a plate-shaped door portion 42 is rotatably provided at the tip of the rear extension portion 34 of the above-described another example (see FIG. 3) via a thin hinge portion 41. The door portion 42 is arranged so as to extend downward in a state where no external force is applied, and contacts the tip end portion of the second passage piece 32 to close the discharge portion 33. In addition, the door 42 is separated from the tip of the second passage piece 32 by, for example, foreign matter such as sand moving outward from the opening 40 side and coming into contact with and pushing the door 42. The discharge part 33 is opened (see the chain double-dashed line in FIG. 4).

  With this arrangement, only when the foreign matter such as sand exerts an external force on the door 42 from the opening 40 side to the outside, the foreign matter such as sand can be discharged. Then, when the door 42 is in a closed state when an external force from the opening 40 side to the outside is not applied, foreign matter such as sand is prevented from entering the opening 40 side from the outside.

  In the above embodiment, the external opening that opens to the outside of the discharge portion 33 is configured to open toward the rear of the vehicle, but the configuration is not limited to this, and the opening is open in other directions. May be

  For example, as shown in FIG. 5, the external opening 43 that opens to the outside of the discharge portion 33 opens in the direction of gravity while being fixed to the vehicle V (in other words, it opens only in the direction of gravity and is horizontal. (It is not opened in the direction). In this example, a wall portion 44 extending downward from the outer circumference of the protector 26 is formed on the vehicle rear side (right side in FIG. 5) of the rear extension portion 34 in the discharge portion 33 of the above-described embodiment (see FIG. 2). There is. The wall portion 44 extends downward to the same position as the lower end of the second passage piece 32, and the side wall 36 is formed continuously up to the wall portion 44. The external opening 43 formed by the lower end of the second passage piece 32, the lower end of the side wall 36, and the lower end of the wall portion 44 is configured to open in the gravity direction while being fixed to the vehicle V. Has been done.

By doing so, it is possible to prevent foreign matter such as sand flying from the horizontal direction from entering the discharge portion 33 through the external opening 43.
In the above-described embodiment, the first and second passage pieces 31 and 32 are assumed to extend while being inclined to the gravity direction in a state of being fixed to the vehicle, but the present invention is not limited to this, and only one of the gravity pieces is gravitated. It may be configured to be inclined and extended in the direction, or neither may be configured to be inclined in the gravity direction.

  In the above-described embodiment, the chamfered portion 37 having an R-shaped cross section is formed at the end of the opening 30 on the side of the electric wire member 20, but the chamfered portion 37 is not limited to this. Alternatively, the chamfered portion may not be formed.

  -In the said embodiment, although the discharge part 33 assumed that it has the 1st and 2nd passage pieces 31 and 32, if it has at least 2 passage pieces which mutually extend in opposite directions, it will be a passage piece. The number may be three or more.

  In the above-described embodiment, the electric wire member 20 includes the electric wire 23 and the braid member 24. However, as long as the electric wire member 20 includes at least the electric wire 23, the electric wire member may have another configuration. For example, the braid member 24 may be an electromagnetic shield member having another structure, or may be an electric wire member (only the electric wire 23) that does not include the electromagnetic shield member. Further, although the aluminum-based metal material is used as the material of the metal element wires constituting the braided member 24 of the above-described embodiment, a copper-based metal material or the like may be used.

-In the above-mentioned embodiment, although the electric wire 23 of the electric wire member 20 was two, it is not limited to this and may be one, and may be three or more.
In the above-described embodiment, the protector 26, which is one of the exterior members through which the electric wire member 20 is inserted, is provided with the openings 30, 40 and the discharge portion 33, but other than the metal pipe 25, the corrugated tube 27, and the like. Similarly, the exterior member may be provided with an opening and a discharge portion. Further, in the above embodiment, the metal pipe 25, the protector 26, and the corrugated tube 27 are provided as the exterior members, but needless to say, it is not necessary to provide all of them, for example, the metal pipe 25 is not provided as the exterior member. The configuration may be such that the metal pipe 25 and the protector 26 are not provided, that is, only the corrugated tube 27 is provided. Of course, the exterior members (metal pipe 25, protector 26, and corrugated tube 27) arranged as described above may be changed to other exterior members, for example, the metal pipe 25 is replaced with a resin pipe as the exterior member. You may change it.

The arrangement relationship between the inverter 11 and the high voltage battery 12 in the vehicle is not limited to the above embodiment, and may be changed appropriately according to the vehicle configuration.
For example, as shown in FIG. 6, the high-voltage battery 12 may be embodied in a wire harness 10 that is disposed on substantially the entire floor of the vehicle V and electrically connects the high-voltage battery 12 and the inverter 11. In this example (see FIG. 6), the metal pipe 25 as an exterior member is not provided, and a corrugated tube 27 is provided between the high voltage battery 12 and the protector 26.

  -In the above-mentioned embodiment, although the inverter 11 and the high voltage battery 12 were employ | adopted as the electric equipment connected by the wire harness 10, it is not limited to this. For example, it may be adopted in a wire harness that connects the inverter 11 and a wheel driving motor. That is, any device that electrically connects the electric devices mounted on the vehicle can be applied.

10 ... Wire harness 20 ... Electric wire member 26 ... Protector (exterior member)
30, 40 ... Opening 31 ... First passage piece (passage piece)
32 ... Second passage piece (passage piece)
33 ... Ejection part 37 ... Chamfer part 42 ... Door part 43 ... External opening V ... Vehicle

Claims (7)

Electric wire member,
A wire harness having an exterior member through which the electric wire member is inserted, the wire harness being fixed to a vehicle,
The exterior member has a maze that has an opening that opens in a direction orthogonal to the extending direction of the electric wire member and at least two passage pieces that alternately extend in opposite directions to communicate the opening and the outside. A wire harness provided with a discharge part of the structure.   The wire harness according to claim 1, wherein at least one of the passage pieces extends in a state of being fixed to the vehicle while being inclined in a gravity direction.   The wire harness according to claim 1, wherein a chamfered portion is formed at an end of the opening on the electric wire member side.   The wire harness according to any one of claims 1 to 3, wherein the opening is formed smaller than a range of an inner surface of the discharging portion on an outer surface of the exterior member.   The wire harness according to any one of claims 1 to 4, wherein the discharge part is provided with a door portion that opens the discharge part by an external force from the opening side toward the outside.   The wire harness according to any one of claims 1 to 5, wherein an outer opening portion that opens to the outside of the discharge portion is opened in the gravity direction while being fixed to the vehicle. An exterior member through which the electric wire member is inserted,
An opening portion opened in a direction orthogonal to the extending direction of the electric wire member, and a discharge portion of a maze structure which has at least two passage pieces alternately extending in opposite directions and communicates the opening portion with the outside. The exterior member provided.