JP2012222888A - Structure for distributing wiring harness - Google Patents

Abstract

PROBLEM TO BE SOLVED: To fix and electrically connect a shield pipe through which an electric wire of a wiring harness is inserted and which comprises an aluminum-based metal and a shield braid tube through which the electric wire extracted from the shield pipe is inserted, with a simple structure; and to prevent corrosion of the shield pipe.SOLUTION: A shield pipe of an aluminum-based metal and a shield braid tube are fixed and electrically connected to each other using a metal bracket and a metal clamp, and the metal bracket comprises a pair of semicircular members comprising an aluminum-based metal of which surface is subjected to the plating process for anticorrosion. Shield pipe insertion grooves are installed in opposite sides of the semicircular members to face each other, and the shield pipe is brought into contact with and inserted into the shield pipe insertion grooves, and the outer periphery of the pair of the semicircular members is covered by the shield braid tube, and the metal clamp is externally fitted to the outer periphery of the shield braid tube and is fastened.

Description

  TECHNICAL FIELD The present invention relates to a wiring structure for a wire harness, and more specifically, corrosion occurs between a shield pipe made of an aluminum-based metal for inserting an electric wire of the wire harness and a shield braided tube for inserting an electric wire drawn from the shield pipe. It is fixed and electrically connected without causing it.

  2. Description of the Related Art Conventionally, there are many cases where wires of a wire harness that are routed between a battery and an inverter of a hybrid vehicle or an electric vehicle or between an inverter and a motor are inserted through a metal shield pipe for wiring. For example, in Japanese Patent Application Laid-Open No. 2006-311699 (Patent Document 1), an electric wire 100 of a wire harness is inserted into a shield pipe 101 as shown in FIG. In the bent wiring path having no space, the electric wire 100 drawn from the shield pipe 101 is inserted into the shield braided tube (flexible shield member) 102 connected to the tip of the shield pipe 101 for wiring. The shield braided tube 102 is a metal wire braided in a mesh shape. The tip of the shield pipe 101 is covered with the tip of the shield pipe 101, and the caulking ring 103 is attached to the outer peripheral side of the shield braided tube 102. By tightening, the shield pipe 101 and the shield braided tube 102 are fixed to enable electrical connection. Further, a rubber grommet 104 is externally provided on the shield braided tube 102 side from a connection portion between the shield pipe 101 and the shield braided tube 102 for the purpose of waterproofing.

JP 2006-311699 A

  The shield pipe 101 is often formed of an aluminum-based metal that is lightweight and excellent in electrical conductivity, while the shield braided tube 102 is formed of a metal different from the aluminum-based metal of the shield pipe 101, such as a copper-based metal wire. There are many cases. In the structure in which the shield pipe 101 and the shield braided tube 102 are brought into contact and fixed by caulking ring 103 on the outer peripheral side as described above, the shield braided tube 102 made of a dissimilar metal in the shield pipe 101 made of an aluminum-based metal There is a problem that the contact portion of the metal is easily corroded by water. If the shield pipe 101 is corroded, the internal electric wires may not be protected and the shielding function may not be performed.

  Therefore, in the above structure, the connector of the terminal of the electric wire 100 inserted from the shield pipe 101 connected to the shield braided tube 102 to the shield braided tube 102 so that the contact portion between the shield pipe 101 and the shield braided tube 102 does not get wet. All areas up to (not shown) need to be waterproof areas, and there is a problem that the structure becomes complicated. That is, the grommet 104, rubber boots (not shown), and water-stopping parts such as a branch grommet (not shown) are required at the branch portion, and when the shield braided tube 102 is covered with a corrugated tube, a slit is formed. There is a problem that workability is not good, such as a corrugated tube (not shown) of a walnut that is not provided in the axial direction of the tube must be used, and it is necessary to perform a wire-passing process on the corrugated tube.

  The present invention has a simple structure and can stably connect and electrically connect a shield pipe made of an aluminum-based metal through which the electric wire of the wire harness is inserted and a shield braided tube through which the electric wire drawn from the shield pipe is inserted. It is an object to prevent corrosion of the shield pipe.

In order to solve the above problems, the present invention is a wiring structure of a wire harness that is wired to a hybrid vehicle or an electric vehicle,
The first region through which the electric wire constituting the wire harness is inserted into a shield pipe made of an aluminum-based metal, and the electric wire drawn out from the shield pipe are inserted into a shield braided tube formed by braiding metal wires into a mesh shape. A second area to be
The shield pipe of the first region and the shield braided tube of the second region are fixed and electrically connected using a metal bracket and a metal clamp,
The metal bracket is composed of a pair of semicircular members made of an aluminum-based metal and divided into two circular plates each having a size covering the shield braided tube, and a shield pipe having semicircular recesses on opposite sides of the semicircular members. An insertion groove is provided oppositely,
The shield pipe is contacted and inserted into the shield pipe insertion groove, the shield braided tube is covered on the outer periphery of the metal bracket made of the pair of semicircular members, and a metal clamp is externally fitted on the outer periphery of the shield braided tube. The shield braided tube is fixed to the shield pipe via the metal bracket and electrically connected with the metal clamp,
Provided is a wire harness wiring structure characterized in that the surface of a pair of semicircular members of the metal bracket is subjected to a plating process having corrosion resistance at least in a region covered with the shield braided tube. .

  As described above, in the present invention, the shield pipe in the first region and the shield braided tube in the second region are fixed by the metal clamp and electrically connected via the metal bracket. The metal bracket is made of an aluminum-based metal similar to the shield pipe, and is composed of a pair of semicircular members obtained by dividing a disk having a size covering the shield braided tube. Furthermore, a shield pipe insertion groove for contacting and inserting the shield pipe is provided on opposite sides of the pair of semicircular members, and at least the shield braided tube is provided on the surface of the pair of semicircular members. The area to be covered is subjected to a plating process having corrosion resistance.

  Therefore, even if the shield braided tube is made of a metal different from the shield pipe such as a copper-based metal wire, the shield pipe and the shield braided tube are not directly brought into contact with each other as in the prior art. Corrosion of the shield pipe is prevented, and the electric wire protection function and shield function of the shield pipe can be maintained.

  In particular, in the above configuration, just by inserting the shield pipe into the shield pipe insertion groove provided in the pair of semicircular members of the metal bracket, the outer periphery of the inserted shield pipe can be closely attached to the metal bracket without any gap, The shield braided tube is put on the outer periphery of the metal bracket in the close contact state, and the metal clamp is externally fitted and fastened to fix the shield pipe and the shield braided tube in a stable state via the metal bracket. Can be connected. At this time, since the shield pipe is inserted and adhered to a metal bracket made of an aluminum-based metal which is the same material, corrosion of the shield pipe can be prevented, and further, a shield braided tube made of a dissimilar metal such as a copper-based metal wire. Since the metal bracket to be covered is also plated with corrosion resistance on the surface, even if the contact portion with the shield braided tube gets wet, corrosion of the metal bracket can be effectively prevented. .

  Therefore, a waterproof structure for preventing water contact at the contact portion between the metal bracket and the shield braided tube is unnecessary, and a simple structure can be achieved. In other words, water-stopping parts such as grommets and rubber boots that have been required in the past and the corrugated tube of walnuts can be abolished, and can be changed to a burly corrugated tube that does not require the passage of wires, thereby increasing manufacturing costs and manufacturing efficiency. it can.

The plating process having the corrosion resistance needs to be applied to at least a region of the surface of the pair of semicircular members forming the metal bracket where the shield braided tube is covered, but the entire surface of the semicircular member is subjected to the plating. It is preferable that processing has been performed.
Examples of the corrosion-resistant plating include tin plating and gold plating. In particular, the plating process having corrosion resistance applied to the surfaces of the pair of semicircular members of the metal bracket is a tin plating process, and the metal wire braiding the shield braided tube is a copper-based metal wire having a tin plating process on the surface. Preferably there is.
On the other hand, it is preferable that the metal clamp is also formed from an aluminum-based metal and the surface thereof is tinned.

  When a plurality of shield pipes are fixed and connected together with a single shield braided tube, the shield pipe insertion grooves are spaced on opposite sides of the pair of semicircular members of the metal bracket. A plurality may be provided side by side. With this configuration, the outer periphery of the plurality of shield pipes can be brought into close contact with the metal bracket without any gap by simply inserting and sandwiching the plurality of shield pipes into the shield pipe insertion grooves of the pair of semicircular members, The shield braided tube is put on the outer periphery of the metal bracket in a close contact state, and a metal clamp is externally fitted and fastened, so that a plurality of shield pipes and one shield braided tube are fixed in a stable state via the metal bracket. Can be connected electrically. That is, according to the above configuration, it is possible to fix and electrically connect with a smaller number of parts and a simple operation than a configuration in which each shield pipe is fixed to the shield braided tube by caulking or the like.

  The metal clamp has an annular shape, and is formed of a caulking ring provided with a caulking projection on a part thereof. The metal bracket is fixed by caulking after the caulking ring is put on the outer periphery of the metal bracket with the tip portion of the shield braided tube interposed therebetween. It is preferable.

  By using caulking as the metal clamp as described above and caulking the caulking projection of the caulking, the fixing between the shield pipe and the shield braided tube becomes stronger and more reliable electrical connection is possible. .

  The metal clamp includes a pair of semi-annular members, bolt holes are provided on both sides of the semi-annular member, and the pair of semi-circular members sandwiching the distal end portion of the shield braided tube on the outer periphery of the metal bracket. After covering the annular member, bolts may be passed through the bolt holes on both sides and fixed with nuts.

  The shield pipe and shield braid can also be obtained by using a pair of semi-annular members provided with bolt holes on both sides as metal clamps as described above, and fixing the bolt holes of the pair of semi-annular members with bolts and nuts. Fixing with the tube becomes strong and reliable electrical connection is possible.

  The pair of semicircular members of the metal bracket may be separated, but one end side may be connected to be freely opened and closed by a hinge. In this way, by connecting the pair of semicircular members with the hinges, the work of sandwiching each shield pipe between the pair of semicircular members is facilitated.

  Preferably, the first area is a wiring area below the vehicle floor, and the second area is a wiring area in an engine room.

  Since the lower part of the vehicle floor is an area that can be wired in a substantially straight line, the vehicle space can be used effectively by making the electric wire connected to a rear-side device such as a battery through the shield pipe and wiring. Can do. On the other hand, since there is a portion that needs to be bent and wired in the engine room, it is preferable that the electric wire drawn out from the shield pipe is a second region that is inserted into the shield braided tube. The electric wire inserted into the shield braided tube can be connected to a device such as an inverter in the engine room. The wire harness in this invention can also be wired between the said inverter and a motor besides the said battery and an inverter.

  As described above, in the present invention, a shield pipe made of an aluminum-based metal and a shield braided tube are fixed by a metal clamp and electrically connected via a metal bracket, and the metal bracket is made of aluminum similar to the shield pipe. It is made of a system metal. Further, the metal bracket is composed of a pair of semicircular members obtained by dividing a disk sized to cover the shield braided tube into two parts, and a shield pipe is inserted into the opposite sides of the semicircular members while contacting the shield pipe. Grooves are provided opposite to each other, and the surface of the pair of semicircular members is subjected to a plating process having corrosion resistance at least in a region where the shield braided tube is covered.

  That is, according to the above configuration, the outer periphery of the inserted shield pipe can be brought into close contact with the metal bracket without any gap just by inserting the shield pipe into the shield pipe insertion groove provided in the pair of semicircular members of the metal bracket. The shield pipe and the shield braided tube are fixed in a stable state through the metal bracket by covering the metal braided tube on the outer periphery of the metal bracket in the close contact state and fitting and fastening the metal clamp. Can be connected electrically. At this time, since the shield pipe is inserted and adhered to a metal bracket made of an aluminum-based metal that is the same material, corrosion of the shield pipe can be prevented, and the electric wire protection function and shield function of the shield pipe can be maintained. it can. In addition, since the metal bracket on which the shield braided tube made of a dissimilar metal such as a copper-based metal wire is covered is plated with corrosion resistance on the surface, even if the contact portion with the shield braided tube is wetted Also, corrosion of the metal bracket can be effectively prevented.

  Therefore, a waterproof structure for preventing water contact at the contact portion between the aluminum-based metal and the dissimilar metal becomes unnecessary, and the structure can be simplified. That is, it is possible to eliminate the water-stopping parts such as grommets and rubber boots and the corrugated tube of the walnut, which have been conventionally required, and to change to the walnut corrugated tube that does not require the passage of the electric wire, thereby increasing the manufacturing cost and manufacturing efficiency.

The wiring structure of the wire harness in 1st Embodiment is shown, (A) is a schematic explanatory drawing of the state wired to the motor vehicle, (B) is a schematic plan view. The connection part of a shield pipe and a shield braided tube is shown, (A) is a schematic perspective view, (B) is an AA sectional view. It is a schematic exploded perspective view which shows a metal bracket. The connection part of the shield pipe and shield braided tube in 2nd Embodiment is shown, (A) is a schematic perspective view, (B) is a BB sectional drawing. It is a schematic perspective view of the connection part of the shield pipe and shield braided tube in 3rd Embodiment. It is a figure which shows a prior art example.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.
1 to 3 show a first embodiment of the present invention. In the present embodiment, in the hybrid vehicle, as shown in FIG. 1, a wire harness is routed to connect the battery 1 mounted on the rear side and the inverter 4 mounted in the engine room 3. Two insulation-coated electric wires 10 (hereinafter referred to as electric wires 10) constituting the wire harness W / H are connected to the battery 1 on the rear side, wired below the floor 2, and drawn upward on the floor 2 on the front side. It is connected to the inverter 4 in the engine room 3.

  The wiring area of the wire harness W / H includes a first area R1 that is wired from the rear side below the floor 2 and is drawn into the engine room 3 on the front side, and the engine area 3 that is continuous with the first area R1. It consists of 2nd area | region R2 wired. In the first region R1, as shown in FIG. 1B, the two electric wires 10 are wired through one shield pipe 11 made of an aluminum-based metal. On the other hand, in the second region R2, the two electric wires 10 drawn from the shield pipe 11 are inserted and wired through one cylindrical shield braided tube 12. The shield braided tube 12 is formed by knitting a copper-based metal wire having a surface plated with tin into a mesh shape. Although not shown, the shield braided tube 12 in the second region R2 is provided with a wall corrugated tube having a slit in the axial direction.

At the boundary position between the first region R1 and the second region R2, it is necessary to fix and electrically connect the distal end portion of the shield braided tube 12 to the distal end portion of the shield pipe 11, and in this embodiment, the metal bracket 13 and the metal The clamp 16 is used for fixing.
The metal bracket 13 is made of an aluminum-based metal and, as shown in FIGS. 2 and 3, a disk (the elliptical disk in this embodiment) having a required thickness that is large enough to cover the shield braided tube 12 is divided into two parts. The shield pipe insertion groove 15 formed of a semicircular recess into which the shield pipe 11 can be inserted in close contact is provided opposite to the opposite sides of the semicircle member 14. The entire surface of the pair of semicircular members 14 is tinned.
On the other hand, the metal clamp 16 is made of a stainless steel metal band. The metal clamp in the present embodiment is a ring-shaped caulking ring as shown in FIG. 2, and a caulking protrusion 17 is provided on a part thereof.

  In order to fix and electrically connect the distal end portion of the shield braided tube 12 to the distal end portion of the shield pipe 11, first, the distal end portion of the shield pipe 11 is inserted into the shield pipe insertion groove 15 provided in the semicircular member 14 of the metal bracket 13. The tip end portion of the shield pipe 11 is sandwiched between the pair of semicircular members 14 of the metal bracket 13.

Next, the two electric wires 10 drawn from the tip of the shield pipe 11 to the second region (R2) side are inserted into the shield braided tube 12, and the first region (R1) side tip of the shield braided tube 12 is inserted. A portion is put on the outer periphery of the metal bracket 13.
Finally, after the metal clamp 16 made of caulking is put on the outer periphery of the metal bracket 13 with the tip of the shield braided tube 12 sandwiched, the caulking protrusion 17 of the metal clamp 16 is swaged and fixed. Thereby, fixation with the shield pipe 11 and the shield braided tube 12 is completed.

  As described above, according to the present embodiment, the shield pipe 11 is inserted into the shield pipe insertion groove 15 provided in the semicircular member 14 of the metal bracket 13, and the shield pipe 11 is sandwiched between the pair of semicircular members 14. Thus, the outer periphery of the inserted shield pipe 11 can be closely attached to the metal bracket 13 without any gap, and the metal braided tube 12 is put on the outer periphery of the metal bracket 13 in the close contact state, and the metal clamp 16 is externally fitted and fastened. Thus, the shield pipe 11 and the shield braided tube 12 can be fixed and electrically connected via the metal bracket 13 in a stable state. At this time, since the shield pipe 11 is inserted and closely attached to the metal bracket 13 made of the same material and made of an aluminum-based metal, the shield pipe 11 can be prevented from being corroded, and the electric wire protection function and shield function of the shield pipe 11 are maintained. can do. Further, since the metal bracket 13 on which the shield braided tube 12 made of a copper metal wire which is a different metal is covered is also tin-plated with excellent corrosion resistance on the surface, the contact portion with the shield braided tube 12 is water. Even if it gets wet, corrosion of the metal bracket 13 can be effectively prevented.

  Therefore, a waterproof structure for preventing water wetting at the contact portion between the metal bracket 13 made of an aluminum-based metal and the shield braided tube 12 made of a different metal becomes unnecessary, and the structure can be simplified. That is, it is possible to eliminate the water-stopping parts such as grommets and rubber boots and the corrugated tube of the walnut, which have been conventionally required, and to change to a walnut corrugated tube that does not require the passage of the electric wire, thereby increasing the manufacturing cost and the manufacturing efficiency.

FIG. 4 shows a second embodiment.
In the second embodiment, the metal clamp 26 is formed from a pair of semi-annular members 27 provided with bolt holes 28 on both sides, and the metal clamp 26 can be fastened by fixing the bolt holes 28 with bolts 29 with nuts N. I have to. Others are the same as in the first embodiment.

FIG. 5 shows a third embodiment.
In the third embodiment, three shield pipes 31 through which one electric wire 30 is inserted are collectively fixed and electrically connected to one shield braided tube 32. On the opposite sides of the pair of semicircular members 34 of the metal bracket 33, three shield pipe insertion grooves 35 made of semicircular recesses are arranged side by side at intervals. Others are the same as in the first embodiment.

  According to the third embodiment, the metal bracket 33 has no gap between the three shield pipes 31 without any gaps, just by inserting the three shield pipes 31 into the shield pipe insertion grooves 35 of the pair of semicircular members 34. The metal braided tube 32 is put on the outer periphery of the metal bracket 33 in the tightly attached state, and the metal clamp 36 is externally fitted and fastened, whereby three shield pipes 31 and one shield braided tube 32 are attached. Can be fixed and electrically connected through a metal bracket 33 in a stable state. That is, according to the above configuration, it is possible to fix and electrically connect with a smaller number of parts and a simple operation than a configuration in which each shield pipe is fixed to the shield braided tube by caulking or the like.

10, 30 Electric wire 11, 31 Shield pipe 12, 32 Shield braided tube 13, 33 Metal bracket 14, 34 Semi-circular member 15, 35 Shield pipe insertion groove 16, 26, 36 Metal clamp 17 Caulking projection 27 Semi-annular member 28 Bolt hole N Nut

Claims (5)

A wiring structure of a wire harness that is routed to a hybrid vehicle or an electric vehicle, the first region through which a wire constituting the wire harness is inserted into a shield pipe made of an aluminum-based metal, and a wire drawn from the shield pipe A second region that is inserted through a shield braided tube formed by braiding a metal wire into a mesh shape,
The shield pipe of the first region and the shield braided tube of the second region are fixed and electrically connected using a metal bracket and a metal clamp,
The metal bracket is composed of a pair of semicircular members made of an aluminum-based metal and divided into two circular plates each having a size covering the shield braided tube, and a shield pipe having semicircular recesses on opposite sides of the semicircular members. An insertion groove is provided oppositely,
The shield pipe is contacted and inserted into the shield pipe insertion groove, the shield braided tube is covered on the outer periphery of the metal bracket made of the pair of semicircular members, and a metal clamp is externally fitted on the outer periphery of the shield braided tube. The shield braided tube is fixed to the shield pipe via the metal bracket and electrically connected with the metal clamp,
A wiring structure of a wire harness, wherein the surface of the pair of semicircular members of the metal bracket is subjected to a plating process having corrosion resistance at least in a region where the shield braided tube is covered.   A plating process having corrosion resistance applied to the surfaces of a pair of semicircular members of the metal bracket is a tin plating process, and the metal wire braiding the shield braided tube is a copper-based metal wire having a surface plated with tin. Item 5. A wiring harness wiring structure according to Item 1.   The metal clamp has an annular shape, and is formed of a caulking ring provided with a caulking projection on a part thereof. The metal bracket is fixed by caulking after the caulking ring is put on the outer periphery of the metal bracket with the tip portion of the shield braided tube interposed therebetween. The wiring structure of the wire harness according to claim 1 or 2.   The metal clamp is composed of a pair of semi-annular members, bolt holes are provided on both sides of the semi-annular member, and the pair of semi-annular rings sandwiching the tip of the shield braided tube on the outer periphery of the metal bracket The wiring structure of the wire harness according to claim 1 or 2, wherein after the member is covered, a bolt is passed through the bolt holes on both sides and fixed with a nut.   The wiring structure for a wire harness according to any one of claims 1 to 4, wherein the first region is a wiring region below a vehicle floor, and the second region is a wiring region in an engine room.

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