JP2020102999A - Wire harness - Google Patents

Abstract

To provide a wire harness capable of reducing an external force applied to an electric wire without increasing the number of parts.SOLUTION: In a wire harness 1 including an electric wire 3 connecting between the electric parts and an exterior member 5 disposed on the outer periphery of the electric wire 3, the exterior member 5 is provided with an external force absorbing unit 7 for absorbing an external force applied to the electric wire 3 from the exterior member 5.SELECTED DRAWING: Figure 2

Description

The present invention relates to a wire harness. More specifically, the present invention relates to a wire harness that connects electric components mounted on a vehicle.

BACKGROUND ART Conventionally, as a wire harness, there is known a wire harness that includes an electric wire connecting a boost converter as an electric component and a rear inverter, and a protector as an exterior member arranged on the outer circumference of the electric wire (for example, , Patent Document 1).

In this wire harness, a flexible tube surrounding the electric wire is provided inside the protector, and when an external force is applied to the electric wire due to a collision of a vehicle or the like, the external force is reduced by the protector and the flexible tube.

JP, 2007-131237, A

However, in the wire harness as described in Patent Document 1, in order to reduce the external force applied to the electric wire, the flexible tube is used in addition to the exterior member, and the number of parts is increased.

Then, this invention aims at provision of the wire harness which can reduce the external force added to an electric wire, without increasing the number of parts.

The invention according to claim 1 is characterized in that an electric wire connecting between electric parts, an exterior member arranged on the outer periphery of the electric wire, and an external force absorption provided on the exterior member to absorb an external force applied to the electric wire from the exterior member. And a wire harness.

In this wire harness, the external member is provided with the external force absorbing portion that absorbs the external force applied to the electric wire from the external member, so that the external force absorbing portion of the external member absorbs the external force input to the external member and inputs it to the electric wire. The external force applied can be reduced.

Therefore, in such a wire harness, since the external force absorbing portion is provided on the exterior member, the external force applied to the electric wire can be reduced without increasing the number of parts.

The invention according to claim 2 is the wire harness according to claim 1, wherein the external force absorbing portion is arranged in a part of the outer member in the circumferential direction, and is stronger than the other part in the circumferential direction of the outer member. It is characterized by being provided differently.

In this wire harness, the external force absorbing portion is disposed in a part of the outer peripheral member in the circumferential direction and is provided with different strength from other portions in the peripheral direction of the outer member, so that the external force input to the outer member is applied. Can be concentrated on the external force absorbing portion, and the external force applied to the electric wire can be reduced.

A third aspect of the present invention is the wire harness according to the first or second aspect, wherein the exterior member has a housing portion that is partially opened in a circumferential direction to house the electric wire, and an opening of the housing portion that is closed. The external force absorbing portion is provided in the closing portion.

In this wire harness, since the external force absorbing portion is provided in the closing portion, it is easy to change the design of the external force absorbing portion by handling the closing portion separately from the housing portion, and the degree of freedom in designing the external force absorbing portion is improved. can do.

The invention according to claim 4 is the wire harness according to any one of claims 1 to 3, wherein the external force absorbing portion is configured such that a part of the exterior member in the circumferential direction is thicker than other parts. It is characterized in that it is a thick portion formed.

In this wire harness, the external force absorbing portion is a thick-walled portion in which a portion of the outer peripheral member in the circumferential direction is formed thicker than the other portions. The external force input to the exterior member can be concentrated and received by the external force absorbing portion, and the external force applied to the electric wire can be reduced.

A fifth aspect of the present invention is the wire harness according to any one of the first to third aspects, wherein the external force absorbing portion is formed so that a portion of the exterior member in the circumferential direction is thinner than other portions. It is characterized by being a thinned portion.

In this wire harness, the external force absorbing portion is a thin portion in which a part of the outer peripheral member in the circumferential direction is formed thinner than the other portions. By lowering the external force input to the exterior member and concentrating it in the external force absorbing portion for deformation, the external force can be received and the external force applied to the electric wire can be reduced.

According to the present invention, there is an effect that it is possible to provide a wire harness capable of reducing an external force applied to an electric wire without increasing the number of parts.

1 is a schematic diagram of a vehicle to which a wire harness according to an embodiment of the present invention is attached. It is sectional drawing of the wire harness which concerns on 1st Embodiment of this invention. It is sectional drawing of the wire harness which concerns on 2nd Embodiment of this invention. It is sectional drawing when the external force absorption part of the wire harness which concerns on 2nd Embodiment of this invention deform|transformed. It is sectional drawing of the wire harness which concerns on 3rd Embodiment of this invention.

The wire harness according to the embodiment of the present invention will be described with reference to FIGS. 1 to 5.

(First embodiment)
The first embodiment will be described with reference to FIGS.

The wire harness 1 according to the present embodiment includes an electric wire 3 that connects between electric components, and an exterior member 5 that is arranged on the outer periphery of the electric wire 3.

Then, the exterior member 5 is provided with an external force absorbing portion 7 that absorbs an external force applied to the electric wire 3 from the exterior member 5.

Further, the external force absorbing portion 7 is arranged in a part of the exterior member 5 in the circumferential direction, and is provided so as to have different strength from other portions of the exterior member 5 in the circumferential direction.

Further, the external force absorbing portion 7 is a thick portion 9 in which a part of the exterior member 5 in the circumferential direction is made thicker than other portions.

Here, as shown in FIG. 1, for example, the wire harness 1 according to the present embodiment electrically connects the electric motor 13 as an electric component mounted on the vehicle 11 and the battery 15.

The wire harness 1 has, for example, two electric wires 3 and 3 as high-voltage electric wires that form a plus circuit and a minus circuit, and both ends thereof are connected to the electric motor 13 side and the battery 15 side, respectively. It is installed under the floor of the vehicle 11.

Hereinafter, the details of the wire harness 1 will be described with reference to FIGS. 1 and 2.

The electric wire 3 is a single-core electric wire made of one conductor, and the outer periphery of the conductor is covered with an insulating coating.

These electric wires 3 are two high-voltage electric wires that form a plus circuit and a minus circuit between the electric parts mounted on the vehicle 11 (here, the electric motor 13 and the battery 15), and are matched to the flowing current value. The conductor diameter is set.

Such an electric wire 3 has rigidity, does not return to its original shape when bent, is excellent in route regulation with respect to the route, and is molded into a predetermined route shape for the vehicle 11.

The electric wire 3 may be a stranded wire in which a plurality of strands are twisted together to form a conductor, and the outer periphery of the conductor is covered with an insulating coating.

In addition, the electric wire 3 may be a shielded electric wire in which a shield member such as a braid or a metal foil is arranged on the outer periphery of the insulating coating.

In the state in which a plurality (here, two) of such electric wires 3 are arranged, the exterior member 5 is arranged so as to cover the outer peripheries of the plurality of electric wires 3.

The exterior member 5 is made of an insulating material such as synthetic resin, is formed in a tubular shape having a rectangular cross section, and has a plurality of inner diameters of the electric wires 3 so that the inner peripheral surface can be separated from the outer peripheral surfaces of the plurality of electric wires 3. The diameter is set larger than the outer diameter.

The exterior member 5 is arranged in a part or the whole of the wiring route of the wire harness 1 in a state where the wire harness 1 is routed under the floor of the vehicle 11, and the vehicle 11 is fixed via a fixing portion (not shown). Attached to.

Such an exterior member 5 prevents the electric wire 3 housed inside from interfering with a peripheral member in a state of being attached to the vehicle 11 and protects the electric wire 3.

When the exterior member 5 is arranged in the entire wiring route of the wire harness 1, it is molded along the wiring shape of the wire harness 1 and is arranged in a part of the wiring route of the wire harness 1. When the wire harness 1 is arranged, the wire harness 1 is molded along the wiring shape of the wire harness 1.

Thus, when the exterior member 5 that houses the electric wire 3 inside is attached to the vehicle 11, when an external force such as a collision of the vehicle 11 is received, the external force is input to the electric wire 3 and the exterior member 5 and the electric wire 3 There is a risk that the insulation coating may be peeled off due to interference with the wire 3 or interference between the plurality of electric wires 3, and the conductors of the plurality of electric wires 3 may come into contact with each other to cause a short circuit.

Therefore, the exterior member 5 is provided with the external force absorbing portion 7 in order to reduce the external force applied to the electric wire 3.

Here, as for the impact due to the collision of the vehicle 11, when the vehicle 11 collides on the front side or the rear side, an external force (impact) is applied in the length direction of the exterior member 5, so that the external force is applied to the electric wire 3 housed inside. It is difficult for the data to be input, and the interference between the exterior member 5 and the electric wire 3 and the interference between the plurality of electric wires 3 are unlikely to occur.

On the other hand, when the vehicle 11 collides on the side surface, the external force (impact) is applied in the width direction of the exterior member 5, so that the external force is easily input to the electric wire 3 housed inside, and the exterior member 5 and the electric wire 3 Interference or interference between the plurality of electric wires 3 is likely to occur.

Therefore, hereinafter, the external force (impact) applied to the exterior member 5 is considered mainly when the vehicle 11 collides on the side surface.

The external force absorbing portion 7 is arranged on a part (here, the upper surface) of the exterior member 5 in the circumferential direction, and is formed of one member that is continuous with other parts (here, both side surfaces and the lower surface) of the exterior member 5 in the circumferential direction. The exterior member 5 is configured.

The external force absorbing portion 7 is a thick-walled portion 9 that is thicker than the thickness of other portions (here, both side surfaces and the lower surface) of the exterior member 5 in the circumferential direction. Is stronger than other parts of the.

The thickness of the thick portion 9 is set so as not to be deformed by the impact when the vehicle 11 collides with the vehicle 11 or to have a strength that is difficult to deform.

When the external force (impact) is applied to the exterior member 5 due to a collision of the vehicle 11 or the like, the external force absorbing portion 7 is not deformed or slightly deformed by the external force, so that the external force is concentrated. Can be received and absorbed.

Thus, even if the exterior member 5 receives an external force, the external force absorbing portion 7 is not deformed or slightly deformed, so that the overall shape of the exterior member 5 does not change so much and the external force (impact) is applied to the electric wire 3 Can be reduced.

By providing the external force absorbing portion 7 on the exterior member 5 in this manner, the external force input to the electric wire 3 is absorbed by absorbing the external force input to the exterior member 5 by the external force absorbing portion 7 without increasing the number of parts. Can be reduced.

In addition, the external force absorbing portion 7 is the thick-walled portion 9 formed to be thicker than the other portions in the circumferential direction of the exterior member 5, so that the exterior member 5 can be formed of the same material to have a different thickness. Thus, the external force absorbing portion 7 can be provided on the exterior member 5, and the manufacturing cost can be reduced.

In such a wire harness 1, the exterior member 5 is provided with the external force absorbing portion 7 that absorbs the external force applied to the electric wire 3 from the exterior member 5, so that the external force absorbing portion 7 of the exterior member 5 inputs the external force to the exterior member 5. It is possible to absorb the applied external force and reduce the external force input to the electric wire 3.

Therefore, in such a wire harness 1, since the external force absorbing portion 7 is provided in the exterior member 5, the external force applied to the electric wire 3 can be reduced without increasing the number of parts.

Further, since the external force absorbing portion 7 is disposed in a part of the exterior member 5 in the circumferential direction and is provided with different strength from other portions in the circumferential direction of the exterior member 5, it is input to the exterior member 5. The external force can be concentrated on the external force absorbing portion, and the external force applied to the electric wire 3 can be reduced.

Further, since the external force absorbing portion 7 is the thick portion 9 in which a part of the exterior member 5 in the circumferential direction is made thicker than the other portions, the strength of the external force absorbing portion 7 in the circumferential direction of the exterior member 5 is increased. The external force can be increased more than other parts, the external force input to the exterior member 5 can be concentrated and received by the external force absorbing portion 7, and the external force applied to the electric wire 3 can be reduced.

(Second embodiment)
The second embodiment will be described with reference to FIGS.

In the wire harness 101 according to the present embodiment, the external force absorbing portion 7 is a thin portion 103 in which a part of the exterior member 5 in the circumferential direction is formed thinner than other portions.

The same components as those in the first embodiment will be denoted by the same symbols, and the description of the configurations and functions will be omitted with reference to the first embodiment. However, since the configurations are the same as those in the first embodiment, it is advantageous. The effect achieved is the same.

As shown in FIGS. 3 and 4, the external force absorbing portion 7 is arranged on a part (here, the upper surface) of the outer member 5 in the circumferential direction, and is arranged on the other part of the outer member 5 in the circumferential direction (here, on both side surfaces). The exterior member 5 is formed by a single member continuous with the lower surface).

The external force absorbing portion 7 is a thin portion 103 that is thinner than the thickness of other portions (here, both side surfaces and the lower surface) of the exterior member 5 in the circumferential direction. The strength is lower than the part.

The thickness of the thin portion 103 is set so as to have a strength such that when the vehicle 11 (see FIG. 1) collides, it is deformed or destroyed by the impact.

When the external force (impact) is applied to the exterior member 5 due to a collision of the vehicle 11 or the like, the external force absorbing portion 7 is deformed or destroyed by the external force, and therefore receives the external force in a concentrated manner. At the same time, the external force can be absorbed so as to change its direction.

Thus, even if the exterior member 5 receives an external force, the external force absorbing portion 7 is deformed or destroyed, so that the overall shape of the exterior member 5 becomes a triangular shape as shown in FIG. It is possible to reduce that the external force (impact) is applied to the electric wire 3 by changing the property of the electric wire and flowing it.

In addition, the external force absorbing portion 7 is the thin-walled portion 103 formed thinner than other portions in the circumferential direction of the exterior member 5, so that by forming the exterior member 5 with the same material and varying the wall thickness, The external force absorbing portion 7 can be provided on the exterior member 5, and the manufacturing cost can be reduced.

In such a wire harness 101, since the external force absorbing portion 7 is the thin portion 103 in which a part of the outer peripheral member 5 in the circumferential direction is formed thinner than the other portions, the strength of the external force absorbing portion 7 is increased. By lowering the external force input to the exterior member 5 to the external force absorbing portion 7 and deforming the external force, the external force can be received and the external force applied to the electric wire 3 can be reduced. You can

(Third Embodiment)
A third embodiment will be described with reference to FIG.

In the wire harness 201 according to the present embodiment, the exterior member 203 has a housing portion 205 that is partially opened in the circumferential direction and houses the electric wire 3, and a closing portion 207 that closes the opening of the housing portion 205. The external force absorbing portion 7 is provided in the closing portion 207.

It should be noted that configurations similar to those of the other embodiments will be denoted by the same symbols and the description of the configurations and functions will be omitted with reference to the other embodiments, but since the configurations are the same as those of the other embodiments, it is advantageous. The effect is the same.

As shown in FIG. 5, the exterior member 203 includes a housing portion 205 and a closing portion 207.

The accommodating portion 205 is formed in a rectangular tubular shape in which a part (here, the upper surface) in the circumferential direction is opened, and has a concave cross-section so that a plurality (here, two) of electric wires 3 can be accommodated therein. There is.

The closing portion 207 is formed in a flat plate shape so as to close the opening of the housing portion 205, and is fixed to the housing portion 205 via the engaging portion 209.

By thus configuring the exterior member 203 with the housing portion 205 and the closing portion 207, the exterior member 203 can be selectively assembled at any position in the length direction of the electric wire 3.

The external force absorbing portion 7 is provided in the closing portion 207 of the exterior member 203 as described above.

The external force absorbing portion 7 constitutes the entire closed portion 207, and is provided by making the strength of the material forming the closed portion 207 different from the strength of the material forming the accommodation portion 205.

When the strength of the external force absorbing portion 7 (closed portion 207) is made higher than the strength of the housing portion 205, when the vehicle 11 (see FIG. 1) collides, the closed portion 207 is not deformed or deformed due to the impact. It is set to have a strength that is difficult to achieve.

When the external force (impact) is applied to the exterior member 203 due to a collision of the vehicle 11 or the like, the external force absorbing portion 7 is not deformed or slightly deformed by the external force, so that the external force is concentrated. Can be received and absorbed.

Thus, even if the exterior member 203 receives an external force, the external force absorbing portion 7 (the closed portion 207) is not deformed or slightly deformed, so that the overall shape of the exterior member 203 is not significantly changed, and the external force ( It is possible to reduce the impact applied to the electric wire 3.

On the other hand, when the strength of the external force absorbing portion 7 (closed portion 207) is set to be lower than the strength of the housing portion 205, when the vehicle 11 collides, the strength at which the closed portion 207 is deformed or destroyed by the impact. Is set to have.

When the external force (impact) is applied to the exterior member 203 due to a collision of the vehicle 11 or the like, the external force absorbing portion 7 is deformed or destroyed by the external force, and therefore receives the external force in a concentrated manner. At the same time, the external force can be absorbed so as to change its direction.

Thus, even if the exterior member 203 receives an external force, the external force absorbing portion 7 (the closing portion 207) is deformed or destroyed, so that the overall shape of the exterior member 203 becomes a triangular shape (see FIG. 4). It is possible to reduce the external force (impact) applied to the electric wire 3 by changing the directionality of the external force to be received.

The housing 205 and the closing portion 207 may be formed of the same material, and the wall thickness of the closing portion 207 may be different from the wall thickness of the housing portion 205 to provide the external force absorbing portion 7 in the closing portion 207.

By providing such an external force absorbing portion 7 in the closing portion 207, the closing portion 207 can be handled separately from the accommodating portion 205, so selection of a material forming the closing portion 207, change of the shape of the closing portion 207, etc. The design change of the external force absorbing portion 7 can be performed independently of the housing portion 205.

In such a wire harness 201, since the external force absorbing portion 7 is provided in the closing portion 207, by handling the closing portion 207 separately from the housing portion 205, it is easy to change the design of the external force absorbing portion 7 and absorb the external force. The degree of freedom in designing the part 7 can be improved.

In the wire harness according to the embodiment of the present invention, the external force absorbing portion is provided at one location in the circumferential direction of the exterior member, but the invention is not limited to this, and the external force absorbing portion is provided at a plurality of locations in the circumferential direction of the exterior member. May be provided.

Further, the thick-walled portion or the thin-walled portion as the external force absorbing portion is formed as a continuous member having different wall thicknesses so as to have a different strength from other portions in the circumferential direction, thereby forming an exterior member. However, not limited to this, for example, the portion where the external force absorbing portion is provided is formed of a material having a different strength from the material of the other portion in the circumferential direction, and the external force absorbing portion and the other portion in the circumferential direction are continuous. The exterior member may be formed by one member.

Furthermore, although two electric wires are arranged inside the exterior member, the present invention is not limited to this, and one wire or three or more electric wires may be arranged inside the exterior member.

Further, although the exterior member has a rectangular cross-sectional shape, the shape of the exterior member is not limited to this, and the exterior member may have any shape such as a circular cross-sectional shape. ..

1, 101, 201... Wire harness 3... Electric wire 5, 203... Exterior member 7... External force absorbing portion 9... Thick portion 103... Thin portion 205... Housing portion 207... Closure portion

Claims (5)

An electric wire that connects between electrical parts,
An exterior member arranged on the outer periphery of the electric wire,
An external force absorbing portion that is provided in the exterior member and absorbs an external force applied to the electric wire from the exterior member,
A wire harness having: The wire harness according to claim 1,
The wire harness, wherein the external force absorbing portion is arranged in a part of a circumferential direction of the exterior member, and is provided with a strength different from that of the other part of the exterior member in the circumferential direction. It is a wire harness of Claim 1 or 2, Comprising:
The exterior member has a housing part that is partially opened in the circumferential direction to house the electric wire, and a closing part that closes the opening of the housing part.
The wire harness, wherein the external force absorbing portion is provided in the closing portion. The wire harness according to any one of claims 1 to 3,
The wire harness characterized in that the external force absorbing portion is a thick-walled portion in which a circumferential portion of the exterior member is thicker than other portions. The wire harness according to any one of claims 1 to 3,
The wire harness, wherein the external force absorbing portion is a thin-walled portion in which a circumferential portion of the exterior member is formed thinner than other portions.

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