Wire harness

Abstract

To provide a wire harness that can suppress displacement of shield wires relative to a single shielding member. [Solution] The wire harness comprises a plurality of shielded wires 20 having a core wire 21, an insulating coating 22 covering the outer circumference of the core wire 21, and a braided member 23 covering the outer circumference of the insulating coating 22; a spacer member 40 interposed between the plurality of braided members 23; a single braided member 50 arranged to cover the plurality of braided members 23 and the spacer member 40 together; and a fastening member 60 that tightens the single braided member 50 from the outer circumference.

Description

[Technical Field]

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

[0002] Conventionally, some wire harnesses include a plurality of electric wires, a plurality of metal pipes that respectively cover each of the electric wires, and an integral shield member that is electrically connected to the plurality of metal pipes and collectively covers the plurality of electric wires from end portions of the metal pipes (see, for example, Patent Document 1). This wire harness includes a pair of metal brackets that sandwich and hold the metal pipes, and a binding member that tightens the integral shield member arranged to cover the metal brackets from the outer periphery. Accordingly, the plurality of metal pipes are electrically connected to the integral shield member via the metal brackets, thereby suppressing the radiation of electromagnetic noise from the wire harness. [Prior Art Documents] [Patent Documents]

[0003] [Patent Document 1] Japanese Unexamined Patent Publication No. 2011-178324 [Summary of the Invention] [Problem to be Solved by the Invention]

[0004] By the way, in a case where the metal pipe in the above wire harness is a flexible shield member such as a braided member or a metal foil, there has been a problem that the shielded electric wire is easily displaced only by sandwiching the shielded electric wire including the electric wire and the shield member between the pair of metal brackets.

[0005] An object of the present disclosure is to provide a wire harness that can suppress displacement of a shielded electric wire relative to an integral shield member. [Means for Solving the Problem]

[0006] The wire harness of this disclosure comprises a plurality of shielded wires having a core wire, an insulating coating covering the outer circumference of the core wire, and a shielding member covering the outer circumference of the insulating coating; a spacer member interposed between the plurality of shielding members; a bundled shielding member arranged to cover the plurality of shielding members and the spacer member together; and a fastening member that tightens the bundled shielding member from the outer circumference. [Effects of the Invention]

[0007] The wire harness of this disclosure can suppress displacement of the shield wire relative to the integrated shielding member. [Brief explanation of the drawing]

[0008] [Figure 1] Figure 1 is a cross-sectional view of a wire harness in one embodiment. [Figure 2] Figure 2 is a cross-sectional view along line 2-2 in Figure 1. [Figure 3] Figure 3 is a perspective view of the spacer member. [Figure 4] Figure 4 is a cross-sectional view along line 4-4 in Figure 1. [Figure 5] Figure 5 is a partial cross-sectional view of a wire harness in another example. [Modes for carrying out the invention]

[0009] [Description of Embodiments in this Disclosure] First, the embodiments of this disclosure will be listed and described. [1] The wire harness of the present disclosure comprises a plurality of shielded wires having a core wire, an insulating coating covering the outer circumference of the core wire, and a shielding member covering the outer circumference of the insulating coating; a spacer member interposed between the plurality of shielding members; a bundled shielding member arranged to cover the plurality of shielding members and the spacer member together; and a fastening member that tightens the bundled shielding member from the outer circumference.

[0010] In this configuration, the bundled shielding member is positioned to cover multiple shielding members and spacer members interposed between them, and its outer circumference is tightened by a binding member, thus firmly fixing it to the shielded wire. In other words, for example, in a configuration where a bundled shielding member simply covers multiple shielding members and is tightened by a binding member, the shielded wire is prone to shifting relative to the bundled shielding member due to the gaps between the shielding members, but this configuration makes it difficult for the wire to shift.

[0011] [2] In the above [1], an inner ring may be provided which is disposed inside the shield member. This configuration includes an inner ring positioned inside the shielding member, which helps to prevent the shielding member from displacing inward. For example, the inner ring prevents the shielding member from displacing inward due to the elastic deformation of the insulating coating. Therefore, the misalignment of the shielded wire relative to the shielding member can be further reduced.

[0012] [3] In the above [1] or [2], the shielded wire has an outer insulating coating that covers the outer circumference of the shielding member in the portion not covered by the shielding member, and the spacer member has a fixing piece that extends along the outer insulating coating, and the fixing piece may be fixed to the outer insulating coating by adhesive tape.

[0013] According to this configuration, the shielded wire has an outer insulating coating that covers the outer circumference of the shielding member in the portion not covered by the bulk shielding member, so the portion of the shielding member not covered by the bulk shielding member is protected by the outer insulating coating. Furthermore, the spacer member has a fixing piece that extends along the outer insulating coating of the shielded wire, and the fixing piece is fixed to the outer insulating coating with adhesive tape, so that the displacement of the spacer member relative to the shielded wire is suppressed. Therefore, the displacement of the shielded wire relative to the bulk shielding member can be further suppressed.

[0014] [4] In any one of the above [1] to [3], the binding member may be made of metal. According to this configuration, since the binding member is made of metal, for example, the collective shield member can be strongly tightened from the outer circumference. Therefore, displacement of the shielded electric wires relative to the collective shield member can be further suppressed.

[0015] [5] In any one of the above [1] to [4], the spacer member may be made of resin. According to this configuration, since the spacer member is made of resin, it can be easily manufactured, for example.

[0016] [6] In any one of the above [1] to [5], the spacer member may have a plurality of first convex portions on a surface facing the collective shield member. According to this configuration, since the spacer member has a plurality of first convex portions on the surface facing the collective shield member, displacement of the spacer member relative to the collective shield member can be suppressed.

[0017] [7] In any one of the above [1] to [6], the spacer member may have a plurality of second convex portions on a surface facing the shield member. According to this configuration, since the spacer member has a plurality of second convex portions on the surface facing the shield member, displacement of the spacer member relative to the shield member can be suppressed.

[0018] [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. In each drawing, for convenience of explanation, a part of the configuration may be shown exaggerated or simplified. Also, the dimensional ratio of each part may differ among the drawings.

[0019] As used in the description of the present specification, the term "cylindrical" includes not only those whose peripheral wall is formed continuously over the entire circumference in the circumferential direction within the range having the required function, but also those formed into a cylindrical shape by combining a plurality of parts, and those having a notch or the like in a part of the circumferential direction like a C-shape. The outer peripheral shape of the "cylindrical" includes, but is not limited to, circular, elliptical, and polygons with sharp or rounded corners. "Cylindrical" refers to a shape having a through hole in a plan view, and includes those in which the outer peripheral shape and the inner peripheral shape of the through hole are the same, and those in which the outer peripheral shape and the inner peripheral shape of the through hole are different. "Cylindrical" includes those having a predetermined length extending along the axial direction in which the central axis passing through the center of the through hole extends, and the length may be large or small.

[0020] Terms such as "first, second" in the present specification are merely used to distinguish objects, and do not rank the objects. It should be noted that the present invention is not limited to these examples, and is intended to include all modifications within the meaning and scope equivalent to the claims, as well as what is indicated by the claims.

[0021] (Configuration of wire harness 10) As shown in FIG. 1, the wire harness 10 includes a plurality of shielded electric wires 20, an inner ring 30, a spacer member 40, a collective braided member 50 as a collective shield member, a binding member 60, and an exterior member 70. The wire harness 10 of the present embodiment includes two shielded electric wires 20. The two shielded electric wires 20 of the present embodiment are, for example, for connecting a high-voltage battery (not shown) and an inverter, and are high-voltage electric wires compatible with high voltage and large current.

[0022] (Configuration of shielded electric wire 20) The shielded electric wire 20 includes a core wire 21, an insulating coating 22, a braided member 23 as a shield member, and an outer insulating coating 24.

[0023] As the core wire 21, for example, a stranded wire made by twisting together multiple metal strands, or a columnar conductor consisting of a single columnar metal rod with a solid internal structure can be used. As the constituent material of the core wire 21, for example, metal materials such as copper-based or aluminum-based materials can be used.

[0024] The insulating coating 22 covers the entire circumference of the core wire 21, for example. The insulating coating 22 is made of an insulating material, such as a synthetic resin. As the constituent material of the insulating coating 22, for example, a synthetic resin mainly composed of polyolefin resins such as cross-linked polyethylene or cross-linked polypropylene can be used.

[0025] The braided member 23, for example, covers the entire circumference of the insulating coating 22. The braided member 23 is made by braiding conductive wires into a cylindrical shape. As the material for the wires constituting the braided member 23, for example, metal materials such as copper or aluminum can be used. The braided member 23 is configured to suppress the radiation of electromagnetic noise to the outside of the braided member 23 when the core wire 21 is energized. Note that in each figure, the illustration of the wires constituting the braided member 23 is omitted, and the braided member 23 is illustrated schematically.

[0026] The outer insulating coating 24 covers the entire circumference of the braided member 23, for example. The outer insulating coating 24 is made of an insulating material such as a synthetic resin. As the constituent material of the outer insulating coating 24, for example, a synthetic resin mainly composed of polyolefin resins such as cross-linked polyethylene or cross-linked polypropylene can be used.

[0027] (Inner ring configuration of 30) As shown in Figures 1 and 2, the inner ring 30 is made of metal and is formed in a cylindrical shape. The inner ring 30 is positioned inside the braided member 23. Specifically, first, the end of the braided member 23 is exposed by removing the outer insulating coating 24. The inner ring 30 is then positioned at the end of the braided member 23, between the inner circumferential surface of the braided member 23 and the outer circumferential surface of the insulating coating 22. The inner ring 30 prevents the braided member 23 from being displaced inward.

[0028] (Configuration of spacer member 40) The spacer member 40 is interposed between multiple braided members 23. The spacer member 40 is made of resin. Specifically, the spacer member 40 is shaped to fill the gaps between multiple braided members 23 that are exposed in the area corresponding to the outside of the inner ring 30. That is, as shown in Figure 2, the spacer member 40 has two arcuate surfaces 40a along the outer circumferential surface of the braided member 23 and a connecting surface 40b that connects these two arcuate surfaces 40a.

[0029] Furthermore, as shown in Figures 1 and 3, the spacer member 40 has two fixing pieces 40c that extend along the outer insulating coating 24 (see Figure 1). As shown in Figures 1 and 4, the fixing pieces 40c are fixed to the outer insulating coating 24 by adhesive tape 41. Specifically, the fixing pieces 40c are fixed to the outer insulating coating 24 by being wrapped together with the outer insulating coating 24 in the adhesive tape 41 while positioned along the outer insulating coating 24.

[0030] (Configuration of the bundled braided member 50) As shown in Figures 1 and 2, the integrated braided member 50 is arranged to cover multiple braided members 23 and spacer members 40 together. The integrated braided member 50 is made of conductive wires woven into a tubular shape. As the material of the wires constituting the integrated braided member 50, for example, metal materials such as copper or aluminum can be used. The integrated braided member 50 is configured to suppress the radiation of electromagnetic noise to the outside of the integrated braided member 50 when the core wire 21 is energized.

[0031] As shown in Figure 1, the integrated braided member 50 is positioned to overlap with the braided members 23 at their ends, and to cover the insulating coating 22 in areas not covered by the braided members 23 and the outer insulating coating 24. In each figure, the individual wires constituting the integrated braided member 50 are omitted from the illustration, and the integrated braided member 50 is shown schematically. The end of the integrated braided member 50 opposite to the side connected to the braided members 23 (left side in Figure 1) is connected to, for example, a metal component of the connector 80, and grounded via that metal component. The end of the braided member 23 opposite to the side connected to the integrated braided member 50 (right side in Figure 1) is connected to, for example, a metal component of a connector (not shown), and grounded via that metal component.

[0032] (Configuration of the binding member 60) As shown in Figures 1 and 2, the fastening member 60 tightens the braided member 50 from the outer circumference. The fastening member 60 in this embodiment is made of metal. The fastening member 60 in this embodiment is a fastening band having a flexible strip-shaped portion 61 and a locking portion 62 (see Figure 2) provided at the longitudinal end of the strip-shaped portion 61. The locking portion 62 locks the strip-shaped portion 61 by restricting its movement in the opposite direction to the direction it is passed through, namely the pulling direction. As a result, the braided member 50 is tightened from the outer circumference by the fastening member 60 and maintains a state of being pressed against the braided member 23. Note that in Figure 2, the shape of the locking portion 62 is schematically shown instead of a cross-section of the fastening member 60.

[0033] (Composition of exterior component 70) As shown in Figure 1, the outer covering member 70 is provided in the wire harness 10 so as to cover at least the portion of the braided member 50. The outer covering member 70 is made of rubber or resin, is formed in a cylindrical shape, and has a bellows structure. Note that the hatching of the outer covering member 70 is omitted in Figure 1.

[0034] (Operation of this embodiment) The operation of this embodiment will be described below. In the parts of the wire harness 10 where braided members 23 are provided, the radiation of electromagnetic noise from the wire harness 10 is suppressed by the braided members 23. In addition, a single braided member 50 is electrically connected to the ends of multiple braided members 23, and in the parts where braided members 23 are not provided, the radiation of electromagnetic noise from the wire harness 10 is suppressed by the single braided member 50.

[0035] (Effects of this embodiment) The effects of this embodiment will be described below. (1) The bundled braiding member 50 is positioned to cover multiple braiding members 23 and spacer members 40 interposed between the multiple braiding members 23, and its outer circumference is tightened by the binding member 60, thereby firmly fixing it to the shielded wire 20. That is, for example, in a configuration in which a bundled braiding member 50 that simply covers multiple braiding members 23 is tightened by the binding member 60, the shielded wire 20 is prone to shifting relative to the bundled braiding member 50 due to the gaps between the braiding members 23, but this can be made less prone to shifting. Therefore, for example, the radiation of electromagnetic noise from the wire harness 10 can be stably suppressed.

[0036] (2) The wire harness 10 is equipped with an inner ring 30 positioned inside the braided member 23, which prevents the braided member 23 from being displaced inward. For example, the inner ring 30 prevents the braided member 23 from being displaced inward due to the elastic deformation of the insulating coating 22 inward. Therefore, the displacement of the braided member 23 relative to the unified braided member 50 can be further suppressed.

[0037] (3) Since the shield wire 20 has an outer insulating coating 24 that covers the outer circumference of the braided member 23 in the portion not covered by the collective braided member 50, the portion of the braided member 23 not covered by the collective braided member 50 is protected by the outer insulating coating 24. Furthermore, the spacer member 40 has a fixing piece 40c that extends along the outer insulating coating 24 of the shield wire 20, and the fixing piece 40c is fixed to the outer insulating coating 24 by adhesive tape 41, so that the displacement of the spacer member 40 relative to the shield wire 20 is suppressed. Therefore, the displacement of the shield wire 20 relative to the collective braided member 50 can be further suppressed.

[0038] (4) Since the binding member 60 is made of metal, for example, it can be tightly fastened to the bundled braiding member 50 from the outer circumference. Therefore, the displacement of the shielded wire 20 relative to the bundled braiding member 50 can be further suppressed.

[0039] (5) Since the spacer member 40 is made of resin, it can be easily manufactured, for example. (Other embodiments) The above embodiment can be implemented with the following modifications. The above embodiment and the following modifications can be combined with each other to the extent that they do not contradict each other technically.

[0040] As shown in Figure 5, the spacer member 40 may have a plurality of first protrusions 40d on the surface facing the braided assembly member 50. That is, the spacer member 40 may have a plurality of first protrusions 40d protruding from the connecting surface 40b. In Figure 5, the first protrusions 40d are schematically shown as becoming sharper towards the tip, but the shape and size may be changed as long as they have a shape that catches on the braided assembly member 50. This makes it possible to suppress the displacement of the spacer member 40 relative to the braided assembly member 50.

[0041] As shown in Figure 5, the spacer member 40 may have a plurality of second protrusions 40e on the surface facing the braided member 23. That is, the spacer member 40 may have a plurality of second protrusions 40e protruding from the arcuate surface 40a. In Figure 5, the second protrusions 40e are schematically shown as becoming sharper towards the tip, but the shape and size may be changed as long as the shape catches on the braided member 23. This makes it possible to suppress the displacement of the spacer member 40 relative to the braided member 23.

[0042] In the above embodiment, the wire harness 10 is provided with an inner ring 30 positioned inside the braided member 23, but it is not limited to this, and a configuration without an inner ring 30 is also possible.

[0043] In the above embodiment, the shielded wire 20 has an outer insulating coating 24 that covers the outer circumference of the braided member 23 in the portion not covered by the braided member 50, but it is not limited to this, and a configuration without an outer insulating coating 24 is also possible.

[0044] In the above embodiment, the spacer member 40 is assumed to have a fixing piece 40c extending along the outer insulating coating 24 of the shield wire 20, but it is not limited to this, and a configuration without a fixing piece 40c is also possible. That is, the spacer member 40 does not have to be fixed to the outer insulating coating 24 by adhesive tape 41. Also, in the above embodiment, the spacer member 40 is assumed to have two fixing pieces 40c, the same number as the number of shield wires 20, but it is not limited to this, and for example, a configuration with only one fixing piece 40c is also possible, and it is fixed to only one outer insulating coating 24.

[0045] In the above embodiment, the fastening member 60 is made of metal, but it is not limited to this, and may be made of resin, for example. Also, in the above embodiment, the fastening member 60 is made of a fastening band having a strip-shaped portion 61 and a locking portion 62, but it is not limited to this, and may be a metal crimping ring that can be tightened by crimping a part of the circumferential direction, for example.

[0046] In the above embodiment, the spacer member 40 is made of resin, but it is not limited to this and may be made of metal, for example. In the above embodiment, a braided member 23 was used as the shielding member, but the invention is not limited to this, and the shielding member may be changed to another flexible shielding member such as metal foil.

[0047] In the above embodiment, a braided member 50 was used as the bulk shielding member, but the invention is not limited to this, and the bulk shielding member may be changed to another bulk shielding member having flexibility, such as metal foil.

[0048] In the above embodiment, the spacer member 40 is a single component interposed between two braided members 23, but it is not limited to this and may be composed of, for example, two or more components.

[0049] In the above embodiment, the wire harness 10 is provided with two shielded wires 20, but it is not limited to this, and for example, it may be configured to provide three or more shielded wires 20. In this case, for example, the number of spacer members 40 interposed between the braided members 23 may be changed.

[0050] In the above embodiment, the wire harness 10 is provided with an outer covering member 70 that covers at least the portion of the braided member 50, but it is not limited to this, and it may be configured without an outer covering member 70. Also, the outer covering member 70 is provided with a bellows structure, but it is not limited to this, and it may be changed to an outer covering member of other shapes.

[0051] The embodiments disclosed herein are illustrative in all respects, and the present invention is not limited to these examples. That is, the scope of the present invention is indicated by the claims, and all modifications within the meaning and scope equivalent to the claims are intended to be included. [Explanation of symbols]

[0052] 10 Wire Harnesses 20 Shielded Cables 21 core wires 22 Insulating coating 23. Braided member (shield member) 24 Outer insulation coating 30 Inner Rings 40 Spacer member 40a Circular arc surface 40b Connecting surface 40c fixed piece 40d First protrusion 40e Second protrusion 41 Adhesive tape 50. Integrated braided members (integrated shield members) 60 Binding members 61 Band-shaped portion 62 Locking part 70 Exterior components 80 connectors

Claims

1. A plurality of shielded wires having a core wire, an insulating coating covering the outer circumference of the core wire, and a shielding member covering the outer circumference of the insulating coating, A spacer member interposed between the plurality of shield members, A single shield member is arranged to cover the plurality of shield members and the spacer members together, The system includes a fastening member that tightens the aforementioned bundled shield member from the outer circumference, Wire harness.

2. The shield member comprises an inner ring positioned inside the shield member, The wire harness according to claim 1.

3. The shielded wire has an outer insulating coating that covers the outer circumference of the shielding member in the portion not covered by the shielding member. The spacer member has a fixing piece that extends along the outer insulating coating, The fixing piece is fixed to the outer insulating coating by adhesive tape. The wire harness according to claim 1.

4. The fastening member is made of metal. The wire harness according to claim 1.

5. The spacer member is made of resin. The wire harness according to claim 1.

6. The spacer member has a plurality of first protrusions on the surface facing the collective shield member. The wire harness according to claim 1.

7. The spacer member has a plurality of second protrusions on the surface facing the shield member. The wire harness according to claim 1.

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