Wire harness

Abstract

To provide a wire harness capable of suppressing desorption of a braided wire from a cylindrical metal member.SOLUTION: A wire harness 10 comprises: an electric wire 21; a metal pipe 22 which covers an outer periphery of the electric wire 21; a cylindrical braided wire 23 which covers an outer periphery of the electric wire 21 and has a fixed end part 23a, and in which the fixed end part 23a is arranged so as to cover an outer periphery of the metal pipe 22; and a binding member 24 which binds the fixed end part 23a to the metal pipe 22 while covering an outer periphery of the fixed end part 23a. The binding member 24 has a plurality of projections on a facing surface 24b to the fixed end part 23a.SELECTED DRAWING: Figure 3

Description

[Technical Field]

[0001] The present disclosure relates to a wire harness. [Background technology]

[0002] Conventionally, a wire harness has been installed under the floor of a vehicle to connect, for example, an inverter installed in the front of the vehicle with a high-voltage battery installed in the rear of the vehicle. One such wire harness includes electric wires, a metal pipe that is arranged under the floor and covers the outer periphery of the electric wires, and a tubular braided wire that is connected to an end of the metal pipe and covers the outer periphery of the electric wires (see, for example, Patent Document 1). The braided wire is arranged such that a first end thereof covers the outer periphery of the metal pipe. The first end of the braided wire is electrically connected to the metal pipe by being covered with a bundling member such as a crimping ring and bundling to the metal pipe. The second end of the braided wire is electrically connected to the vehicle body via a metal shell or the like of a connector that is connected to the inverter and the high-voltage battery. In such a wire harness, the metal pipe and the braided wire suppress noise radiation from the electric wires. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Application Publication No. 2019-53958 Summary of the Invention [Problem to be solved by the invention]

[0004] However, in the above-described wire harness, for example, the thickness of the braided wire arranged to cover the outer periphery of the metal pipe is not uniform, which causes variations in the fastening force of the bundling member. As a result, there is a risk that the fastening force of the bundling member will not satisfy the standard value. In other words, there is a risk that the first end of the braided wire will come off the metal pipe.

[0005] An object of the present disclosure is to provide a wire harness that can prevent a braided wire from coming off a tubular metal member. [Means for solving the problem]

[0006] The wire harness of the present disclosure is a wire harness comprising: an electric wire; a tubular metal member covering the outer periphery of the electric wire; a tubular braided wire covering the outer periphery of the electric wire and having a fixed end that is arranged so that the fixed end covers the outer periphery of the tubular metal member; and a binding member that covers the outer periphery of the fixed end and binds the fixed end to the tubular metal member, wherein the binding member has a plurality of protrusions on the surface facing the fixed end. [Effects of the Invention]

[0007] According to the wire harness of the present disclosure, it is possible to prevent the braided wire from coming off the tubular metal member. [Brief explanation of the drawings]

[0008] [Figure 1] FIG. 1 is a schematic diagram showing a wiring path of a wire harness according to an embodiment. [Figure 2] FIG. 2 is a partially enlarged side view of the wire harness according to the embodiment. [Figure 3] FIG. 3 is a cross-sectional view taken along line 3-3 in FIG. [Figure 4] FIG. 4 is a schematic diagram of a portion of a binding member according to one embodiment, viewed from the radially inner side. DETAILED DESCRIPTION OF THE INVENTION

[0009] [Description of the embodiments of the present disclosure] First, embodiments of the present disclosure will be listed and described. The wire harness of the present disclosure includes: [1] A wire harness comprising: an electric wire; a tubular metal member covering the outer periphery of the electric wire; a tubular braided wire covering the outer periphery of the electric wire and having a fixed end, the fixed end being arranged so as to cover the outer periphery of the tubular metal member; and a binding member covering the outer periphery of the fixed end and binding the fixed end to the tubular metal member, wherein the binding member has a plurality of protrusions on the surface facing the fixed end.

[0010] According to this configuration, the binding member has multiple protrusions on the surface facing the fixed end of the braided wire, making it easier to hook onto the fixed end. Specifically, the protrusions fit into the gaps in the braided wire, making it easier for the binding member to hook onto the fixed end of the braided wire. This prevents the binding member from shifting position relative to the fixed end of the braided wire. This allows the strong adhesive strength between the fixed end of the braided wire and the tubular metal member to be maintained, thereby preventing the braided wire from coming off the tubular metal member.

[0011] [2] In the above item [1], the plurality of protrusions may be provided around the entire periphery of the surface facing the fixed end. According to this configuration, the plurality of protrusions are provided around the entire circumference of the surface facing the fixed end, making it easier for the binding member to be caught on the fixed end around the entire circumference, thereby further reducing misalignment of the binding member with respect to the fixed end of the braided wire.

[0012] [3] In the above [1] or [2], the braided wire is formed by weaving a plurality of conductive wires so that they are inclined with respect to the circumferential and axial directions of the braided wire, and each of the plurality of convex portions may have an inclined portion inclined with respect to the circumferential and axial directions of the fixed end portion.

[0013] According to this configuration, each of the plurality of protrusions has an inclined portion inclined with respect to the circumferential direction and the axial direction of the fixed end, which makes it easier for the binding member to catch on the strands of the braided wire compared to, for example, a configuration without an inclined portion, thereby further reducing misalignment of the binding member with respect to the fixed end of the braided wire.

[0014] [4] In the above item [3], each of the plurality of protrusions may be formed in a diamond shape. According to this configuration, since each of the plurality of protrusions is formed in a diamond shape, for example, the plurality of inclined portions can easily catch on the strands of the braided wire, thereby further reducing the positional deviation of the binding member relative to the fixed end of the braided wire.

[0015] [5] In any one of the above [1] to [4], the binding member may be made of a metal material. According to this configuration, since the binding member is made of a metal material, it is less likely to loosen than, for example, one made of a resin material, and it is possible to firmly bind the fixed end to the tubular metal member.

[0016] [Details of the embodiments of the present disclosure] Specific examples of the present disclosure will be described below with reference to the drawings. In each drawing, for the convenience of explanation, some components may be exaggerated or simplified. Furthermore, the dimensional proportions of each part may differ from one drawing to another. Furthermore, the present invention is not limited to these examples, but is defined by the claims, and is intended to include all modifications within the meaning and scope equivalent to the claims.

[0017] (Overall configuration of the wire harness 10) 1 electrically connects two or more electrical devices. The wire harness 10 of this embodiment electrically connects an inverter 11 installed in the front of a vehicle V, such as a hybrid vehicle or an electric vehicle, to a high-voltage battery 12 installed behind the inverter 11 on the vehicle V.

[0018] The inverter 11 is connected to a wheel drive motor (not shown) that serves as a power source for running the vehicle. The inverter 11 generates AC power from DC power from a high-voltage battery 12 and supplies the AC power to the motor. The high-voltage battery 12 is a battery capable of supplying a voltage of, for example, several hundred volts.

[0019] The wire harness 10 is routed, for example, so as to pass under the floor of the vehicle V. That is, a middle portion of the wire harness 10 in the longitudinal direction is routed so as to pass outside the passenger compartment below an underfloor panel 13 of the vehicle V. A first end of the wire harness 10 is connected to the inverter 11 via a connector C1, and a second end of the wire harness 10 is connected to the high-voltage battery 12 via a connector C2.

[0020] 1 to 3, the wire harness 10 includes electric wires 21, a metal pipe 22 as a tubular metal member, a tubular braided wire 23, and a bundling member 24. As shown in FIGS. 2 and 3, the wire harness 10 of this embodiment includes a plurality of electric wires, i.e., two electric wires 21. Furthermore, as shown in FIG. 1, the wire harness 10 of this embodiment includes two braided wires 23.

[0021] (Configuration of electric wire 21) As shown in FIG. 3, the electric wire 21 has a core wire 21a and an insulating coating 21b that covers the outer periphery of the core wire 21a.

[0022] The core wire 21a is formed of, for example, a twisted wire made by twisting together a plurality of conductive wires, a single core wire, etc. The core wire 21a is made of, for example, a metal material such as copper or aluminum. The cross section of the core wire 21a in this embodiment is formed to have a perfect circular shape.

[0023] The insulating coating 21b covers the entire outer periphery of the core wire 21a and is made of an insulating material such as a synthetic resin containing polyolefin resin, such as cross-linked polyethylene or cross-linked polypropylene, as a main component.

[0024] (Configuration of metal pipe 22) As shown in Figures 1 to 3, the metal pipe 22 is formed in a cylindrical shape that covers the outer periphery of the electric wire 21. As shown in Figure 3, the metal pipe 22 of this embodiment is formed in a perfect circular shape when viewed in the extension direction. The metal pipe 22 covers two electric wires 21 together. As shown in Figure 1, the metal pipe 22 is mainly disposed below the underfloor panel 13 of the vehicle V, and covers the middle part of the electric wire 21 in the extension direction.

[0025] (Structure of braided wire 23) As shown in Fig. 2, the braided wire 23 is formed by weaving a plurality of conductive element wires 31 into a tubular shape. More specifically, the braided wire 23 is formed by weaving a plurality of conductive element wires 31 so as to be inclined with respect to the circumferential and axial directions of the braided wire 23. Each figure schematically illustrates how the element wires 31 are weaved, and Fig. 2 in particular schematically illustrates how the element wires 31 are weaved so as to be inclined with respect to the circumferential and axial directions of the braided wire 23. The braided wire 23 can be made of a metal material such as a copper-based or aluminum-based material. The braided wire 23 of this embodiment covers two electric wires 21 together.

[0026] The braided wire 23 has a fixed end 23a which is a first end in the extending direction of the braided wire 23. The fixed end 23a is arranged so as to cover the outer periphery of the metal pipe 22. In other words, the fixed end 23a is arranged so as to overlap the outer periphery of the metal pipe 22.

[0027] (Configuration of binding member 24) 2 and 3, the binding member 24 covers the outer periphery of the fixed end 23a of the braided wire 23 and binds the fixed end 23a to the metal pipe 22. The binding member 24 in this embodiment is made of a metal material such as a copper-based or aluminum-based material. Furthermore, the binding member 24 has a crimped portion 24a that is crimped so that a portion of the circumferential direction of the binding member 24 is pinched when the metal band is formed into a ring shape, thereby binding the fixed end 23a toward the metal pipe 22 radially inward. Note that the figures schematically illustrate the binding member 24, omitting detailed illustrations of the connection portions and the like formed when the metal band is formed into a ring shape.

[0028] The binding member 24 has a plurality of protrusions 24c (see FIG. 4) on a surface 24b (see FIG. 3) facing the fixed end 23a. The plurality of protrusions 24c are provided around the entire periphery of the surface 24b facing the fixed end 23a. The plurality of protrusions 24c are also provided on the surface 24b facing the fixed end 23a over the entire width direction corresponding to the extension direction of the fixed end 23a.

[0029] As shown in Fig. 4, each of the plurality of protrusions 24c has an inclined portion 24d inclined with respect to the circumferential direction and the axial direction of the fixed end portion 23a. In other words, each of the plurality of protrusions 24c has an inclined portion 24d inclined with respect to the extending direction of the binding member 24 (the left-right direction in Fig. 4), which is the direction corresponding to the circumferential direction of the fixed end portion 23a. More specifically, each of the plurality of protrusions 24c in this embodiment is formed in a diamond shape. As a result, each of the plurality of protrusions 24c has a shape having four inclined portions 24d. In other words, the binding member 24 has a knurled surface 24b (see Fig. 3) facing the fixed end portion 23a.

[0030] 1, the second end of one braided wire 23 is electrically connected to a ground member such as a vehicle body or a metal case via a metal shell (not shown) of connector C1, etc. The second end of the other braided wire 23 is electrically connected to a ground member such as a vehicle body or a metal case via a metal shell (not shown) of connector C2, etc.

[0031] (Operation of the embodiment) Next, the operation of the wire harness 10 configured as above will be described. Under the underfloor panel 13 of the vehicle V, the electric wires 21 are covered with the metal pipe 22, which prevents foreign objects such as flying stones from colliding with the electric wires 21. In addition, the electric wires 21 are covered over their entire length with the metal pipe 22 and the braided wire 23, which suppresses noise radiation from the electric wires 21.

[0032] (Effects of the embodiment) Next, the effects of the above embodiment will be described below. (1) The binding member 24 has a plurality of protrusions 24c on the surface 24b facing the fixed end 23a of the braided wire 23, which makes it easy to hook onto the fixed end 23a. Specifically, the protrusions 24c fit into the gaps in the braided wire 23, making it easy for the binding member 24 to hook onto the fixed end 23a of the braided wire 23. This prevents the binding member 24 from shifting in position relative to the fixed end 23a of the braided wire 23. This makes it possible to maintain a high adhesive strength between the fixed end 23a of the braided wire 23 and the metal pipe 22, thereby preventing the braided wire 23 from coming off the metal pipe 22. As a result, noise radiation from the electric wire 21 can be stably suppressed.

[0033] (2) The plurality of protrusions 24c are provided on the entire circumference of the surface 24b facing the fixed end 23a of the braided wire 23, and therefore easily catch on the fixed end 23a around the entire circumference. Therefore, the positional deviation of the binding member 24 with respect to the fixed end 23a of the braided wire 23 is further suppressed.

[0034] (3) The braided wire 23 is formed by weaving a plurality of conductive elemental wires 31 so that they are inclined with respect to the circumferential and axial directions of the braided wire 23. Each of the plurality of protrusions 24c has an inclined portion 24d that is inclined with respect to the circumferential and axial directions of the fixed end 23a, and therefore is more likely to catch on the elemental wires 31 of the braided wire 23 than, for example, one that does not have an inclined portion 24d. Therefore, the binding member 24 is more likely to be misaligned with the fixed end 23a of the braided wire 23.

[0035] (4) Each of the plurality of protrusions 24c is formed in a diamond shape, and therefore, for example, the plurality of inclined portions 24d can easily catch on the wires 31 of the braided wire 23. Therefore, the positional deviation of the binding member 24 with respect to the fixed end 23a of the braided wire 23 is further suppressed.

[0036] (5) Because the binding member 24 is made of a metal material, it is less likely to loosen than, for example, a binding member made of a resin material, and it is possible to bind the fixed end 23a to the metal pipe 22 firmly.

[0037] (Example of change) The above embodiment can be modified as follows: The above embodiment and the following modifications can be combined with each other within the scope of technical compatibility.

[0038] In the above embodiment, the plurality of protrusions 24c are provided around the entire circumference of the opposing surface 24b facing the fixed end 23a of the braided wire 23, but this is not limited thereto. For example, the protrusions may be provided on a portion of the circumferential direction of the opposing surface 24b.

[0039] In the above embodiment, each of the plurality of protrusions 24c is formed in a diamond shape, but this is not limited thereto. For example, the protrusions 24c may be formed in a triangular shape having inclined portions 24d inclined with respect to the circumferential and axial directions of the fixed end portion 23a.

[0040] In the above embodiment, each of the plurality of protrusions 24c has an inclined portion 24d inclined with respect to the circumferential direction and the axial direction of the fixed end portion 23a, but this is not limited thereto, and the protrusions 24c may have no inclined portion 24d. For example, each of the plurality of protrusions 24c may be formed in a circular shape.

[0041] In the above embodiment, the binding member 24 is made of a metal material, but is not limited thereto and may be made of, for example, a resin material. For example, the binding member may be a cable tie having a flexible strip portion and a locking portion provided at the longitudinal end of the strip portion to lock the strip portion when it is passed through. Even in such a cable tie made of a resin material, the braided wire 23 can be prevented from coming off the metal pipe 22 by providing multiple protrusions on the surface facing the fixed end 23a of the braided wire 23.

[0042] In the above embodiment, the tubular metal member to which the fixed end 23a of the braided wire 23 is fixed is the metal pipe 22, but this is not limited to this. For example, the tubular metal member may be the metal shell of the connector C1 or the connector C2.

[0043] In the above embodiment, the metal pipe 22 is formed in a perfect circular shape when viewed in the extension direction, but this is not limited to this. For example, the metal pipe 22 may be formed in another shape, such as an oval shape, when viewed in the extension direction.

[0044] In the above embodiment, the wire harness 10 includes two electric wires 21, but this is not limited thereto, and the wire harness 10 may include only one electric wire 21, or may include three or more electric wires 21. [Explanation of symbols]

[0045] 10 Wire harness 11 Inverter 12 High-voltage battery 13 Underfloor panel 21 Electric wire 21a core wire 21b Insulation coating 22 Metal Pipe 23 Braided wire 23a Fixed end 24 Binding member 24a Crimping part 24b Opposite surface 24c convex part 24d Slope 31 Wire C1 Connector C2 Connector V vehicle

Claims

1. Electric wires and a cylindrical metal member covering the outer periphery of the electric wire; a cylindrical braided wire that covers the outer periphery of the electric wire and has a fixed end portion, the fixed end portion being arranged so as to cover the outer periphery of the cylindrical metal member; a binding member that covers an outer periphery of the fixed end portion and binds the fixed end portion to the tubular metal member; A wire harness comprising: The binding member has a plurality of protrusions on a surface facing the fixed end portion. Wire harness.

2. The plurality of protrusions are provided on the entire periphery of the surface facing the fixed end portion. The wire harness according to claim 1 .

3. the braided wire is formed by weaving a plurality of conductive wires together so as to be inclined with respect to the circumferential direction and the axial direction of the braided wire, Each of the plurality of protrusions has an inclined portion inclined with respect to the circumferential direction and the axial direction of the fixed end portion. The wire harness according to claim 1 .

4. Each of the plurality of protrusions is formed in a diamond shape. The wire harness according to claim 3 .

5. The binding member is made of a metal material. The wire harness according to claim 1 .

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