Wire harness

Abstract

To provide a wire harness which is capable of performing inter-wire cutoff between electric wires and grounding of a braised conductor and capable of easily assembling a wiring material from an indoor side to a mounting panel.SOLUTION: In a wire harness WH, in a state where a grommet unit comprising a first grommet 10 and a second grommet 20 is mounted in a penetration hole 101 of a mounting panel 100, a braised conductor Wh and a bracket 30 are electrically connected by a shield ring SR. In an insertion state where a portion of the bracket 30 is inserted into the penetration hole 101, a flange part 32 is opposed with an indoor side face 102 in an extension direction. A cylindrical part 31 protrudes from an outdoor side face 103 to an outdoor side, a stud bolt 106 is inserted into a bolt insertion hole, a nut is screwed to the stud bolt 106 and the flange part 32 is fastened to the mounting panel 100, such that the bracket 30 and the mounting panel 100 are electrically connected.SELECTED DRAWING: Figure 4

Description

[Technical Field]

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

[0002] When wiring a high-voltage shielded wiring material under the floor of a vehicle such as an electric vehicle, the shielded wiring material is routed by being inserted into a through-hole formed in a mounting panel that separates the interior and exterior of the vehicle, as necessary. For example, some such shielded wiring materials have a body earth structure and a grommet structure with a waterproof function (see, for example, Patent Document 1). [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Application Laid-Open No. 2005-192279 Summary of the Invention [Problem to be solved by the invention]

[0004] Conventionally, when assembling a grommet with a metal sheet through which a wiring material is inserted into a through-hole in a mounting panel, the assembly work has been performed from the exterior side of the vehicle, but a change in the order of the vehicle assembly process may require the assembly work to be performed from the interior side.When the assembly work is performed from the interior side, it is not as easy to ground the braided conductor covering the wiring material by electrically connecting it to the mounting panel compared to assembly work from the exterior side, and it is not easy to achieve both grounding of the braided conductor and inter-wire waterproofing between the electric wires.

[0005] An object of the present invention is to provide a wire harness that is capable of waterproofing between electric wires and grounding a braided conductor, and that allows wiring materials to be easily assembled to a mounting panel from the indoor side. [Means for solving the problem]

[0006] In order to achieve the above object, a wire harness according to the present invention includes at least one wiring member inserted into a through hole that penetrates from an interior side to an exterior side of a mounting panel that separates an interior and exterior of a vehicle, and a conductive wiring member that is disposed on an outer peripheral surface of the wiring member in an extending direction. , room a braided conductor covering an outer peripheral surface located on the outer surface side; a conductive bracket having openings at both ends in the extension direction through which the wiring material is inserted and attached to the mounting panel with a portion of the bracket inserted into the through hole; The exterior side the bracket includes an annular shield ring for fixing an end of the braided conductor to the bracket and electrically connecting the braided conductor and the bracket, a first grommet arranged between the bracket and the wiring material to seal water between the bracket and the wiring material, and a second grommet arranged between the bracket and the through hole to seal water between the bracket and the mounting panel, and the bracket includes a cylindrical portion through which the wiring material is inserted, an annular flange portion protruding from one end of the cylindrical portion in the extending direction in a direction perpendicular to the extending direction, and a flange portion extending from the cylindrical portion in the extending direction. and at least one pair of bolt insertion holes that penetrate the flange portion in the extension direction and into which fastening members provided on the indoor side surface are inserted, and when a part of the bracket is inserted into the through hole, the flange portion faces the indoor side surface in the extension direction, and the tubular portion protrudes from the outdoor side surface to the outside of the room, and the fastening members are inserted into the bolt insertion holes, and the fastened member is screwed onto the fastening member to fasten the flange portion to the mounting panel, thereby electrically connecting the bracket and the mounting panel. [Effects of the Invention]

[0007] The wire harness according to the present invention has the advantages of enabling waterproofing between electric wires and grounding of the braided conductor, and also allowing the wiring material to be easily assembled to the mounting panel from the indoor side. [Brief explanation of the drawings]

[0008] [Figure 1] FIG. 1 is a perspective view of a wire harness according to an embodiment. [Figure 2] FIG. 2 is an exploded perspective view of the wire harness according to the embodiment. [Figure 3] FIG. 3 is an exploded perspective view of the wire harness according to the embodiment. [Figure 4] FIG. 4 is a cross-sectional view of the wire harness according to the embodiment. DETAILED DESCRIPTION OF THE INVENTION

[0009] Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. Note that the present invention is not limited to the following embodiments. That is, the components in the following embodiments include those that a person skilled in the art would easily imagine or that are substantially the same, and various omissions, substitutions, and modifications can be made without departing from the spirit of the invention.

[0010] [Embodiment] The wire harness WH of this embodiment shown in FIG. 1 is a high-voltage shielded wiring material that is routed, for example, under the floor of a vehicle such as an electric vehicle. The wire harness WH includes two wiring materials W, a braided conductor Wh for shielding the wiring materials W, and a grommet unit 1 through which the two wiring materials W are inserted. The wire harness WH is routed by being inserted through a through-hole 101 formed in a mounting panel 100 that separates the exterior (e.g., engine compartment) and interior (e.g., cabin) of a vehicle (not shown). The mounting panel 100 is, for example, a conductive metal plate that constitutes the body of the vehicle. As shown in FIGS. 1 and 2 , the through-hole 101 penetrates the mounting panel 100 from an interior side surface 102 to an exterior side surface 103. In other words, the through-hole 101 penetrates the mounting panel 100 in the plate thickness direction. A grommet unit 1 having a body earthing structure and a waterproof function is attached to the through-hole 101. The mounting panel 100 is an example of a fastening member, and as shown in Fig. 2, has a pair of stud bolts 105, 106 protruding from an interior side surface 102. The pair of stud bolts 105, 106 are provided at positions facing each other with the through hole 101 in between.

[0011] In the following description, the illustrated X direction is the extension direction of the wire harness WH in this embodiment. The Y direction is a first direction perpendicular to the extension direction of the wire harness WH in this embodiment. The first direction is, for example, the arrangement direction of two wiring materials W in the wire harness WH. The Z direction is a second direction perpendicular to the extension direction of the wire harness WH in this embodiment and the first direction. The X direction, Y direction, and Z direction are mutually perpendicular. The first direction and the second direction are not limited to the vertical direction and the horizontal direction perpendicular to the vertical direction. The first direction and the second direction correspond to the extension direction of the mounting panel 100. The extension direction in this embodiment corresponds to the plate thickness direction of the above-mentioned mounting panel 100 and corresponds to the insertion direction of the wiring material W and the grommet unit 1 into the through hole 101. Here, for the sake of clarity, the two wiring materials W are described as being arranged linearly along the extension direction, but this is not limiting, and the two wiring materials W inserted into the grommet unit 1 may be partially bent or curved so as to deviate from the extension direction when the grommet unit 1 is attached to the mounting panel 100. Furthermore, unless otherwise specified, the directions used in the following description are described as directions when the grommet unit 1 is assembled to the mounting panel 100.

[0012] The grommet unit 1 is applied to the through hole 101 when routing a wiring material W across two spaces (an outdoor space and an indoor space) separated by the mounting panel 100. The grommet unit 1 is attached to the through hole 101 in the mounting panel 100 with the wiring material W inserted through the through hole 101, and is fixed to the indoor side surface 102 of the mounting panel 100 via collars 120 and 121 using stud bolts 105 and 106 and nuts 110 and 111, which are fastened members.

[0013] The wiring material W is, for example, an electric wire. An electric wire has a conductor portion (core wire) made of multiple conductive metal wires covered with an insulating coating portion. Here, the wiring material W is, for example, a thick electric wire used in high-voltage systems.

[0014] The braided conductor Wh covers and shields the outer peripheral surface of the wiring material W in the extension direction that is located on the outdoor side. The braided conductor Wh is formed into a tubular shape by weaving multiple conductive braided wires into a mesh pattern. Note that the mesh shape of the braided conductor Wh is omitted from the braided conductor Wh shown in Figures 1 and 4 for ease of illustration. One end of the braided conductor Wh in the extension direction is electrically connected to the grommet unit 1 and is grounded via the grommet unit 1 and the grounding member of the mounting panel 100. The grommet unit 1 is electrically connected to the braided conductor Wh.

[0015] The grommet unit 1 is assembled into the through hole 101 with the wiring material W of the wire harness WH inserted therethrough and sheathed around the wiring material W, thereby electrically connecting and grounding the braided conductor Wh to the mounting panel 100 and waterproofing the through hole 101. The grommet unit 1 protects the wiring material W passing through the through hole 101, waterproofs the through hole 101, and also has functions such as dustproofing and soundproofing. The grommet unit 1 includes a bracket 30, a first grommet 10, a second grommet 20, and a shield ring SR.

[0016] The bracket 30 is made of a conductive metal material or the like. As shown in FIG. 1, the bracket 30 is attached to the mounting panel 100 in an inserted state with a portion inserted into the through hole 101. The bracket 30 has open ends in the extension direction through which the wiring material W is inserted. In the inserted state, the bracket 30 is supported by the mounting panel 100 via the second grommet 20. In the inserted state, the bracket 30 supports two wiring materials W via the first grommet 10. As shown in FIGS. 2 to 4, the bracket 30 has a tubular portion 31, a flange portion 32, and a blocking portion 33.

[0017] The tubular portion 31 extends in the extension direction, and is the portion through which the wiring material W is inserted along the extension direction when the two wiring materials W are inserted through the bracket 30. When viewed from the extension direction, the tubular portion 31 has an oval shape with a major axis and a minor axis, and the two wiring materials W are arranged along the major axis direction. A flange portion 32 is connected to one indoor end of the tubular portion 31 in the extension direction, and a blocking portion 33 is connected to the other outdoor end.

[0018] The flange portion 32 is a ring-shaped portion that protrudes from the interior end of the tubular portion 31 in a direction perpendicular to the extension direction. The flange portion 32 extends radially outward from the tubular portion 31. The flange portion 32 has a substantially rectangular shape when viewed from the extension direction. The shape of the flange portion 32 when viewed from the extension direction is substantially the same as the shape of the second grommet 20. The flange portion 32 has a pair of bolt insertion holes 36, 37 that penetrate in the extension direction. The pair of bolt insertion holes 36, 37 are located at positions facing each other across the second opening 35. The second opening 35 penetrates in the extension direction and has an oval shape when viewed from the extension direction. A portion of the second grommet 20 is inserted into the second opening 35. In the inserted state described above, the stud bolts 105, 106 of the mounting panel 100 are inserted into the bolt insertion holes 36, 37.

[0019] The blocking portion 33 is a ring-shaped portion that protrudes from the exterior end of the cylindrical portion 31 in a direction perpendicular to the extension direction. The blocking portion 33 extends radially inward of the cylindrical portion 31. The blocking portion 33 has a first opening 34 that penetrates in the extension direction. The first opening 34 has an oval shape when viewed from the extension direction. The first grommet 10 is attached to the first opening 34.

[0020] The first grommet 10 is disposed between the bracket 30 and the wiring material W, and serves to waterproof the space between the bracket 30 and the wiring material W. As shown in Figures 2 to 4, the first grommet 10 is configured to include a main body 11, a tubular portion 12, and a connecting portion 13, which are integrally formed as an elastic body. The first grommet 10 is formed from an insulating elastic resin material (e.g., ethylene-propylene-diene rubber (EPDM)) that has low rigidity and high flexibility, such as rubber or a thermoplastic elastomer.

[0021] The main body 11 is a portion that seals water between the blocking portion 33 and the wiring material W when the first grommet 10 is attached to the first opening 34 of the bracket 30, and through which the wiring material W is inserted along the extension direction. The main body 11 is configured to include an outdoor water-stopping portion 14A and an indoor water-stopping portion 14B, and is formed cylindrically as a whole.

[0022] The outdoor water stop portion 14A is formed in an annular shape so as to surround the first opening 34 of the bracket 30. The outdoor water stop portion 14A contacts the outdoor side surface 33A, which constitutes one surface in the extension direction of the blocking portion 33, and is a portion that seals water between the outdoor side surface 33A and the outdoor water stop portion 14A. The outdoor water stop portion 14A is configured to include a first water stop protrusion 15. The first water stop protrusion 15 is provided at the radially outer end of the outdoor water stop portion 14A and is formed as a protrusion with its tip facing the outdoor side surface 33A, forming an annular outer peripheral portion that follows the annular shape of the outdoor water stop portion 14A. When the first grommet 10 is attached to the first opening 34, the outdoor water stop portion 14A elastically deforms to closely contact the outdoor side surface 33A around the periphery of the first opening 34, sealing the entire periphery of the first opening 34.

[0023] The indoor-side water stopping portion 14B is formed in a ring shape so as to surround the first opening 34 of the bracket 30. The indoor-side water stopping portion 14B is a portion that comes into contact with the indoor side surface 33B that is configured as the other surface in the extension direction of the blocking portion 33, and stops water from entering between the indoor side surface 33B and the indoor side surface 33B. The indoor-side water stopping portion 14B is configured to elastically deform and come into close contact with the indoor side surface 33B around the periphery of the first opening 34, sealing the entire periphery of the first opening 34, when the first grommet 10 is attached to the first opening 34.

[0024] The tubular portion 12 extends in the extension direction, and when two wiring materials W are inserted into the bracket 30, the wiring material W is inserted inside along the extension direction. The tubular portion 12 is formed integrally with the connecting portion 13 and is connected to the main body portion 11 via the connecting portion 13. The tubular portion 12 extends from the connecting portion 13 along the extension direction so as to move away from the exterior side surface 103 of the mounting panel 100, and is configured to penetrate the connecting portion 13. The wiring material W inserted into the tubular portion 12 is arranged to penetrate the main body portion 11. Multiple tubular portions 12 are formed side by side. Two tubular portions 12 are formed side by side along the first direction. One wiring material W is inserted into one tubular portion 12. One wiring material W is configured as one electric wire. When the first grommet 10 is attached to the first opening 34, the tubular portion 12 is configured to elastically deform and adhere to the outer surface of the wiring material W that is on the outside of the room, thereby sealing the entire outer surface of the wiring material W.

[0025] The connecting portion 13 is provided so as to surround the tubular portion 12 and is formed so as to connect the tubular portion 12 and the main body portion 11. As shown in Fig. 4, the connecting portion 13 has a substantially S-shaped cross section and is allowed to bend in the extension direction, the first direction, and the second direction.

[0026] Second grommet 20 is disposed between bracket 30 and through-hole 101, and serves to waterproof the gap between bracket 30 and mounting panel 100. As shown in FIGS. 2 to 4, second grommet 20 includes a main body and a flange 22, which are integrally formed as an elastic body. Like first grommet 10, second grommet 20 is formed from an insulating elastic resin material having low rigidity and high flexibility, such as rubber or a thermoplastic elastomer (e.g., ethylene-propylene-diene rubber (EPDM)).

[0027] The main body portion 21 extends in the extension direction, and is the portion into which the two wiring materials W are inserted when the wiring materials W are inserted into the bracket 30. When viewed from the extension direction, the main body portion 21 has an oval shape with a major axis and a minor axis, and the two wiring materials W are arranged along the major axis direction. A flange portion 22 is connected to one of the indoor side ends of the main body portion 21 in the extension direction.

[0028] The flange portion 22 is a ring-shaped portion that protrudes from the outdoor end of the main body portion 21 in a direction perpendicular to the extension direction. The flange portion 22 extends radially outward from the main body portion 21. When viewed from the extension direction, the flange portion 22 has a substantially rectangular shape. The flange portion 22 has a pair of through holes 26, 27 that penetrate in the extension direction. The pair of through holes 26, 27 are located opposite each other across an opening 28. The opening 28 penetrates in the extension direction and has an oval shape when viewed from the extension direction. The tubular portion 31 of the bracket 30 is inserted into the opening 28. In the inserted state described above, the stud bolts 105, 106 of the mounting panel 100 are inserted into the through holes 26, 27. The flange portion 22 includes second watertight projections 23, 24, 25.

[0029] The second water-stopping projection 23 is provided on the outdoor side surface of the flange portion 22, and is formed in a protruding shape with its tip facing the outdoor side and along the annular shape of the main body portion 21. When the bracket 30 is supported on the mounting panel 100 via the second grommet 20, the second water-stopping projection 23 faces the indoor side surface 102 of the mounting panel 100 in the extension direction.

[0030] The second water-stopping projections 24, 25 are provided on the indoor side of the flange portion 22, and are formed in a protruding shape with their tips facing the indoor side and along the opening 28. The second water-stopping projections 24, 25 face the flange portion 32 of the bracket 30 in the extension direction when the bracket 30 is supported on the mounting panel 100 via the second grommet 20. When viewed from the extension direction, the second water-stopping projections 24 are located inside the second water-stopping projections 25, and multiple second water-stopping projections 24 are provided on the flange portion 22.

[0031] As shown in Figures 1 and 4, the shield ring SR is Outdoor side The end of the shield ring SR is fixed to the bracket 30, electrically connecting the braided conductor Wh and the bracket 30. The shield ring SR is made of a conductive metal material or the like and is formed in an annular shape. The shield ring SR is formed between the outer peripheral surface of the cylindrical portion 31 of the bracket 30 and the braided conductor Wh. Outdoor side The end of the bracket 30 is clamped and fixed to the bracket 30.

[0032] Next, an installation procedure for installing the wire harness WH using the grommet unit 1 will be described. It is assumed that the wire harness WH is inserted through the through hole 101 of the mounting panel 100, and the grommet unit 1 is located on the interior side of the vehicle. First, the grommet unit 1 is inserted into the through hole 101 from the interior side of the mounting panel 100, while the stud bolts 105, 106 are inserted into the bolt insertion holes 36, 37 and the through holes 26, 27. In this case, the grommet unit 1 is inserted into the through hole 101 from the first grommet 10 side, and the main body 21 of the second grommet 20 is brought into contact with the periphery of the through hole 101. The second grommet 20 is then pushed in so that the main body 21 is located on the exterior side of the through hole 101 and the flange 22 of the second grommet 20 is in contact with the interior side surface 102 of the mounting panel 100. Next, collars 120, 121 are inserted into the indoor end portions of stud bolts 105, 106, and then nuts 110, 111 are screwed onto stud bolts 105, 106. Then, nuts 110, 111 are tightened using a tightening tool such as an impact wrench, air driver, or nut runner to fix grommet unit 1 to mounting panel 100.

[0033] As shown in Fig. 4 , in the present embodiment, the braided conductor Wh is fixed to the bracket 30 by the shield ring SR and electrically connected to the bracket 30 when the grommet unit 1 of the wire harness WH is attached to the mounting panel 100. The state in which the grommet unit 1 is attached to the mounting panel 100 is an inserted state in which a portion of the bracket 30 is inserted into the through-hole 101. In the inserted state, the flange portion 32 of the bracket 30 faces the indoor side surface 102 in the extension direction, the tubular portion 31 protrudes from the outdoor side surface 103 to the outdoor side, and stud bolts 105, 106 are inserted into the bolt insertion holes 36, 37. Nuts 110, 111 are screwed onto the stud bolts 105, 106 to fasten the flange portion 32 to the mounting panel 100, thereby electrically connecting the bracket 30 and the mounting panel 100. This makes it possible to ground the braided conductor Wh even during the assembly work of assembling the grommet unit 1 to the mounting panel 100 from the indoor side.

[0034] As described above, in the wire harness WH of this embodiment, when a portion of the bracket 30 is inserted into the through hole 101, the flange portion 32 faces the indoor side surface 102 in the extension direction, the tubular portion 31 protrudes from the outdoor side surface 103 to the outside of the room, and the stud bolts 105, 106 are inserted into the bolt insertion holes 36, 37, and nuts 110, 111 are screwed onto the stud bolts 105, 106 to fasten the flange portion 32 to the mounting panel 100, thereby electrically connecting the bracket 30 and the mounting panel 100.

[0035] With the above configuration, the bracket 30 can be attached to the mounting panel 100 from the indoor side with the braided conductor Wh fixed to the bracket 30, and the wiring material W can be easily assembled to the mounting panel 100 from the indoor side. Furthermore, since the first grommet 10 seals water between the bracket 30 and the wiring material W, and the second grommet 20 seals water between the bracket 30 and the mounting panel 100, inter-wire waterproofing is possible even when assembling from the indoor side. Furthermore, the bracket 30 and the mounting panel 100 are electrically connected by inserting the stud bolts 105, 106 of the mounting panel 100 into the bolt insertion holes 36, 37 of the bracket 30 and screwing nuts 110, 111 onto the stud bolts 105, 106 to fasten the flange portion 32 to the mounting panel 100, thereby enabling grounding of the braided conductor Wh even when assembling from the indoor side. In this way, it is possible to achieve watertightness between the electric wires and ground the braided conductor Wh, and the wiring material W can be easily assembled to the mounting panel 100 from the indoor side.

[0036] The wire harness WH according to the embodiment of the present invention and the method for installing the wire harness WH described above are not limited to the above embodiment, and various modifications are possible within the scope of the claims. The wire harness WH according to the present embodiment may be configured by appropriately combining the components of the above-described embodiment and modified examples. The wire harness WH may also include various components such as exterior members such as a corrugated tube, a resin tape, and a protector, an electrical connection box, and a fixture.

[0037] In the above embodiment, the wiring material W is described as being made of a thick electric wire used in a high-voltage system, but it is not limited to this and may be made of a metal rod, a bundle of electric wires, etc. A metal rod is a conductive rod-shaped member whose outside is covered with an insulating coating. A bundle of electric wires is a bundle of electric wires.

[0038] In the above embodiment, the cylindrical portion 31 has an oval shape when viewed from the extension direction, but is not limited to this and may have a circular shape. In addition, when there is one wiring material W, the cylindrical portion 31 may have a circular shape when viewed from the extension direction. [Explanation of symbols]

[0039] 1 grommet unit 10 First grommet 20 Second grommet 30 Bracket 31 Cylindrical part 32 Flange 36,37 Bolt insertion holes 100 Mounting Panel 101 Through hole 102 Interior side 103 Outdoor side 105,106 Stud bolt 110,111 Nut WH Wire Harness W Routing material Wh braided conductor SR Shield Ring

Claims

[Claim 1] At least one wiring member is inserted into a through-hole that penetrates from the interior side to the exterior side of a mounting panel that separates the interior and exterior of the vehicle; a braided conductor having electrical conductivity and covering an outer peripheral surface of the wiring material in the extending direction, the outer peripheral surface being located on the outdoor side; a bracket that is electrically conductive, has open ends in the extension direction through which the wiring material is inserted, and is attached to the mounting panel with a portion of the bracket inserted into the through hole; an annular shield ring that fixes the end of the braided conductor on the outdoor side surface side to the bracket and electrically connects the braided conductor and the bracket; A first grommet arranged between the bracket and the wiring material to waterproof the space between the bracket and the wiring material; a second grommet disposed between the bracket and the through hole to seal the gap between the bracket and the mounting panel; The bracket is A cylindrical portion through which the wiring material is inserted; an annular flange portion protruding from one end of the cylindrical portion in the extending direction in a direction perpendicular to the extending direction; At least one pair of bolt insertion holes penetrate the flange portion in the extension direction and into which fastening members provided on the indoor side surface are inserted, In an inserted state in which a part of the bracket is inserted into the through hole, the flange portion faces the indoor side surface in the extension direction, the tubular portion protrudes from the outdoor side surface to the outdoor side, and the fastening member is inserted into the bolt insertion hole, a fastened member is screwed into the fastening member, and the flange portion is fastened to the mounting panel, thereby electrically connecting the bracket and the mounting panel; A wire harness characterized by:

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