JP2011233404A - Shield conductor - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a shield conductor capable of suppressing deterioration of shield performance.SOLUTION: A shield conductor 10 comprises: a plurality of flat wires 11a to 11c; a braided wire 20 which is formed by weaving metal wires in a mesh form and entirely covers the plurality of the flat wires 11A to 11C; a wire holding member 30 which integrally holds the plurality of the flat wires 11A to 11C so as to tightly adhere to the outer periphery of each flat wire 11A to 11C. The wire holding member 30 is provided with a protrusion 38 which passes though a clearance 21 in a mesh form on the braided wire 20.

Description

  The present invention relates to a shield conductor.

  When connecting multiple devices such as inverters and motors in vehicles such as hybrid vehicles and electric vehicles, multiple wires are bundled with a cylindrical braided wire so that the electronic circuit is not affected by electromagnetic noise. Thus, a shield conductor covered is used.

  For example, as shown in Patent Document 1, a braid is put on the outside of three electric wires, and a spiral tube or a clip is attached while shrinking the braid from the outside of the braid, so that the three electric wires are collectively put in the braid. There is something to cover.

JP 2003-115223 A

  By the way, in the structure of patent document 1, a spiral tube or a clip cannot be mounted | worn in the place which needs to arrange | position each electric wire separated by predetermined spacing like a terminal part, for example. For this reason, the braid at the terminal portion is not fixed in relative position with respect to the electric wire, and there is a possibility that the mesh performance of the braid is locally rough and fine due to the knitting of the braid, and the shielding performance is deteriorated. .

  The present invention has been completed based on the above circumstances, and an object of the present invention is to provide a shield conductor capable of preventing a decrease in shield performance.

The shield conductor according to the present invention is formed by braiding a plurality of electric wires and metal wires into a mesh shape, and covering the plural electric wires collectively, and so as to be in close contact with the outer periphery of each electric wire. An electric wire holding member that integrally holds the plurality of electric wires, and the electric wire holding member is characterized in that a convex portion that penetrates a gap in the mesh of the braided wire is provided ( Means 1).
According to the structure of the means 1, since the deviation of the braided wire is suppressed by the convex portion of the electric wire holding member, a coarse portion and a fine portion of the local braided mesh are hardly generated, and a decrease in shielding performance can be suppressed.

In addition to the configuration of the means 1, the shield conductor is attached to the electric wire routing path of the vehicle via the attachment fixture, and the convex portion is provided with the recess provided in the attachment fixture. You may make it position by carrying out uneven | corrugated fitting (means 2).
If it is made the structure of the means 2, a shield conductor can be positioned in the predetermined electric wire wiring path | route in a vehicle.

In addition to the configuration of the means 1 or 2, the outer periphery of the braided wire may be covered with an exterior protection material, and the convex portion may penetrate the exterior protection material (means 3).
According to the configuration of the means 3, in addition to improving the heat dissipation by arranging the outer protective material on the outer periphery of the braided wire, the convex portion penetrates the outer protective material, thereby shifting the position of the outer protective material. Can be suppressed.

In addition to the configuration of any one of the means 1 to 3, the electric wire may be a flat electric wire including a flat metal conductor portion and an insulating coating covering the periphery of the metal conductor portion ( Means 4).
According to the configuration of means 4, since the flat shape of the flat electric wire has a small dead space, a large surface area and good heat dissipation, in addition to being able to increase the energizing current, the flat shape makes it easy to bend. This makes it easier to route the wires.

  In addition to the configuration of the means 4, the electric wire holding member is provided with a partition wall for partitioning the flat electric wires, and the flat electric wire passes through the partition wall in a direction along a flat surface. May be arranged side by side (means 5).

  In addition to the configuration of the means 4, the wire holding member includes a first holding member and a second holding member, and the first holding member is arranged at a position closer to the terminal than the second holding member. The first holding member is provided with a first partition wall that partitions the flat wires, and the flat wire has the first partition wall in a direction along a flat surface. The second holding member is provided with a second partition wall for partitioning the flat electric wires, and the flat electric wires are arranged in a direction perpendicular to the flat surface of the flat electric wires. It may be arranged side by side via the second partition wall (means 6).

  According to the present invention, it is possible to suppress a decrease in shielding performance of the shield conductor.

Side sectional view showing schematic structure of shield conductor of embodiment 1 A perspective view showing the first holding member Plan view showing the first holding member Front view showing the first holding member Side view showing the first holding member Bottom view showing the first holding member A perspective view showing a second holding member A plan view showing the second holding member Front view showing the second holding member Side view showing the second holding member Bottom view showing the second holding member Sectional drawing showing the shield conductor attached to the vehicle in the part of the 1st holding member Sectional drawing showing the shield conductor attached to the vehicle in the part of a 2nd holding member

<Embodiment 1>
A first embodiment of the present invention will be described with reference to FIGS.
The shield conductor 10 of the present embodiment is routed between devices (not shown) such as a battery, an inverter, and a motor that constitute a power source for traveling in a vehicle such as an electric vehicle, for example. Two wires are provided between the battery and the inverter, and three wires are provided between the inverter and the motor. Hereinafter, in this embodiment, the shield conductor 10 provided with three flat electric wires 11A to 11C arranged in a predetermined route (electric wire arrangement route) between the inverter and the motor will be described. In addition, about the front-back direction, the left side of FIG. 1 is demonstrated as the front and the right side is back.

  As shown in FIG. 1, the shield conductor 10 includes three (a plurality of) flat electric wires 11 </ b> A to 11 </ b> C, a braided wire 20 that collectively covers the three flat electric wires 11 </ b> A to 11 </ b> C, and an outer side of the braided wire 20. An outer protective material 22 that covers and tightly covers, a shield shell 25 disposed between the terminal of the braided wire 20 and the device case CA, and an electric wire holding member that integrally holds the three flat electric wires 11A to 11C. 30.

The flat electric wires 11A to 11C are configured by a metal conductor portion 13 having a generally flat shape by arranging a plurality of core wires 12 (see FIG. 12) in parallel with each other, and an insulating coating 14 made of a synthetic resin covering the periphery thereof. The shield layer is not provided. Three flat electric wires 11A to 11C are provided so that three-phase AC power can be transmitted.
The core wire 12 is formed by spirally twisting a large number of copper or copper alloy metal strands.

  Since the flat electric wires 11A to 11C having such a shape have a substantially rectangular cross-sectional shape, the dead current is small, the surface area is large, and the heat dissipation is good.

As shown in FIG. 1, terminal fittings 15 are connected to the terminal portions of the flat electric wires 11 </ b> A to 11 </ b> C.
The terminal fitting 15 includes a flat plate-like connection portion 16 having a bolt hole, and a barrel portion (not shown) that is connected to the connection portion 16 and crimps the flat electric wires 11A to 11C. The barrel portion is covered with a connector 17 formed of resin, and the seal ring 18 is surrounded without a gap. The shield conductor 10 is waterproofed by the outer periphery of the seal ring 18 being in close contact with the opening of the case CA of the device without a gap 21.

  In addition, although flat electric wire 11A-11C can be arrange | positioned with a various attitude | position (direction), in this embodiment, the flat surface of flat electric wires 11A-11C is arrange | positioned with the attitude | position along an up-down direction. And in order to make it connectable with the terminal, connector, etc. of an apparatus side, in the terminal part, the flat electric wires 11A-11C are arranged in the upper and lower three steps in the state away from the predetermined dimension. On the other hand, the flat electric wires 11A to 11C at positions away from the terminal are arranged side by side at substantially the same height position in order to reduce the space for electric wire routing.

  The braided wire 20 has a cylindrical shape formed by braiding metal wires into a mesh shape (mesh shape) and collectively surrounds the three flat electric wires 11A to 11C. The braided wire 20 can be expanded and contracted in the radial direction and expanded and contracted in the length direction due to the flexibility of the fine metal wires. The braided wire 20 can generate coarse portions (portions with large mesh lattice gaps) and fine portions (portions with small mesh lattice spaces) due to expansion and contraction. Expansion and contraction is suppressed by the convex portion 38 of the electric wire holding member 30 to be performed.

  The exterior protective material 22 is an insulating resin that adheres to substantially the entire outer periphery of the braided wire 20, and a thread-shaped synthetic resin (for example, an elastic body such as rubber) may be formed with almost no gap (or a slight gap). It has a net shape. In the present embodiment, the exterior protective material 22 is provided with a through hole 23 through which a convex portion 38 of an electric wire holding member 30 described later passes. However, the through hole 23 is not provided, and a net of the exterior protective material 22 is provided. Alternatively, a gap (through hole) through which the convex portion 38 can be inserted may be provided.

  The shield shell 25 is an integral part formed by subjecting a metal plate material to a deep drawing process. The shield part 25 is formed as a whole in a horizontally long and substantially oval cylindrical part 26, and the entire outer periphery from the front end edge of the cylindrical part 26. And a plate-like flange portion 27 projecting to the outside. Bolt holes (not shown) corresponding to female screw holes (not shown) of the case CA of the device are formed in the flange portion 27, and are attached to the case CA in a surface contact state. Then, the braided wire 20 is put on the outer periphery of the cylindrical portion 26, and the shield shell 25 and the braided wire 20 are connected by caulking with a caulking ring 28 from above the braided wire 20.

The electric wire holding member 30 is made of synthetic resin, and is provided with two first holding members 31 respectively arranged at positions near the terminals on both sides, and one second holding member used in an intermediate portion away from the terminals. 41.
The first holding member 31 holds the flat electric wires 11A to 11C side by side in the direction along the flat surface, and as shown in FIG. 2, the flat (flat) of the three flat electric wires 11A to 11C. Bottom plate portion 33 on which flat surfaces are placed side by side, side wall portions 34 and 34 rising from both side edge portions of bottom plate portion 33, and two first partition walls that partition between rising side wall portions 34 and 34 from bottom plate portion 33. 35, 35 (partition walls), and thereby, three accommodating portions 32 that can accommodate the flat electric wires 11A to 11C are formed side by side.

Both side wall parts 34 and 34 and the first partition walls 35 and 35 are raised to a position higher than the height dimension (the vertical dimension in FIG. 12) of the flat electric wires 11 </ b> A to 11 </ b> C. The side surfaces 35A and 35A of the inner side surface 34A and the first partition walls 35 and 35 are curved in a U-shape so that the entire semicircular side surfaces of the flat electric wires 11A to 11C are in close contact (recessed). )
Locking portions 36 for restricting the detachment of the flat electric wires 11 </ b> A to 11 </ b> C and locking in the housing portion 32 are provided on the upper portions of the side wall portions 34 and 34 and the first partition walls 35 and 35. Among the locking portions 36, the locking portions 36 provided on the both side wall portions 34, 34 are provided at the front end portions of the side wall portions 34, 34, and are curved inwardly toward the upper side of the side wall portions 34, 34. As a result, a locking portion 36 is formed.

The locking portions 36 of the first partition walls 35, 35 are formed on both sides of the upper part of the first partition walls 35, 35 by increasing the width of the upper side of the first partition walls 35, 35 (thickening the wall). Each is formed.
The locking portion 36 is slightly tapered at the distal end side by cutting the upper surface side into an inclined shape at the distal end portion.
The dimension between the lower end of the locking part 36 and the upper end of the bottom plate part 33 is substantially equal to the thickness dimension of the flat electric wires 11A to 11C (see FIG. 12), whereby the flat electric wires 11A to 11C are accommodated in the accommodating part 32. It is held so as not to be displaced.
The thicknesses of the side wall portions 34, 34 and the first partition walls 35, 35 (the dimensions in the left-right direction in FIG. 4) are bent and deformed to such an extent that the flat electric wires 11A to 11C can be inserted through the grooves between the locking portions 36, 36. It is formed with a possible thickness.

On the outer peripheral surface of the first holding member 31, a plurality of convex portions 38 penetrating the mesh gap 21 of the braided wire 20 are provided.
Specifically, as shown in FIG. 2, the convex portion 38 is cylindrical and protrudes in the axial direction of the column, and is provided on the upper surface of each partition wall 35 at two locations on the front and rear sides, and on the outer surface (outside surface) of each side wall portion 34. Two side portions are provided on the side surface.
The height of the convex portion 38 is the height of the braided wire 20 and the exterior protective material 22 superimposed on the braided wire 20, and the depth of the concave portion 60 </ b> A provided in the vehicle-mounted fixture 50 described later. The dimensions are added.
The size of the circular cross section of the convex portion 38 is set to a size that can penetrate the mesh gap 21 (lattice) of the braided wire 20 and the through hole 23 of the net of the exterior protection material 22.

  The second holding member 41 is arranged and held in a direction orthogonal to the flat surfaces of the flat electric wires 11A to 11C, and as shown in FIG. 7, the three flat electric wires 11A to 11C are overlapped on the left and right. A bottom plate portion 43 to be placed, side wall portions 44 and 44 rising from both side edge portions of the bottom plate portion 43, and two second partition walls 45 for partitioning between the rising side wall portions 44 and 44 from the bottom plate portion 43 in the width direction, 45, and thereby, three accommodating portions 42 that can accommodate the flat electric wires 11A to 11C are provided side by side.

Both side wall parts 44 and 44 and the 2nd partition walls 45 and 45 are raised to the position higher than the width dimension (dimension of the up-down direction of FIG. 13) of flat electric wire 11A-11C.
Locking portions 46 for restricting the detachment of the flat electric wires 11 </ b> A to 11 </ b> C and locking in the accommodating portion 42 are provided on the upper portions of the side wall portions 44 and 44 and the second partition walls 45 and 45. The locking portion 46 is formed at the distal end portion of the side wall portions 44, 44 by bending the upper portions of the side wall portions 44, 44 inwardly with respect to the side wall portions 44, 44.

The second partition walls 45, 45 are formed on both sides of the upper part of the second partition walls 45, 45 by increasing the width dimension of the upper part of the second partition walls 45, 45 (thickening). .
The locking portion 46 is slightly tapered at the distal end side by cutting the upper surface side into an inclined shape at the distal end portion.
The dimension between the lower end of the latching | locking part 46 and the upper end of the baseplate part 43 is substantially equal to the width dimension of flat electric wire 11A-11C, and, thereby, flat electric wire 11A-11C does not shift in the accommodating part 42. To be held.

The thicknesses of the side wall portions 44, 44 and the second partition walls 45, 45 (the dimensions in the left-right direction in FIG. 9) are such that the flat wires 11A to 11C can be bent and deformed to the extent that they can be inserted between the locking portions 46. Is formed.
In addition, in order to accommodate the flat electric wires 11A to 11C in the accommodating portion 42, one end side in the width direction of the flat electric wires 11A to 11C is inserted into a groove between the locking portions 46, and the side wall portions 44 and 44 and the second partition wall are inserted. The flat electric wires 11A to 11C can be accommodated in the accommodating portion 42 by bending 45, 45, and the flat electric wires 11A to 11C are locked by the restoring deformation of the side walls 44, 44 and the second partition walls 45, 45. Locked by the portion 46.

Here, on the outer peripheral surface of the second holding member 41, a plurality of convex portions 48 penetrating the mesh gap 21 of the braided wire 20 are provided.
Specifically, the convex portion 48 has a cylindrical shape, and is provided at two front and rear positions on the upper surface of each second partition wall 45 and at two front and rear positions on the outer surface (outer surface) side of each side wall portion 44.
The height of the convex portion 48 is the height of the braided wire 20 and the exterior protective material 22 superimposed on the braided wire 20, and the depth of the concave portion 70 </ b> A provided in the vehicle-mounted fixture 50 described later. The dimensions are added.
The size of the circular cross section of the convex portion 48 is set to a size that can penetrate the mesh gap 21 (lattice) of the braided wire 20 and the through hole 23 of the net of the exterior protection material 22.

These shield conductors 10 are attached to predetermined positions of the vehicle via the attachment fixture 50.
The attached fixture 50 is clamped, and includes a first fixture 51 that houses the first holding member 31 therein, and a second fixture 61 that houses the second holding member 41 inside.
As shown in FIG. 12, the first fixture 51 includes a pair of holding pieces 52 and 52 that are halved in a direction along the flat surface of the flat electric wires 11 </ b> A to 11 </ b> C. A pair of holding pieces 52, 52 are closed by a fastening member including a bolt 54 and a nut 55 on the opposite side of the hinge portion 53, while being connected to each other by a hinge portion 53 that is an elastic connecting member. It can be fixed with. Further, one holding piece 52 is provided with an attachment portion 57 having an attachment hole 56 for fixing to the wall surface WA inside the vehicle, and a bolt is attached to the attachment hole 58 having a screw groove provided in the wall surface WA. The fixing member 59 can be attached.

In the first fixture 51, an insertion portion 60 through which a portion of the shield conductor 10 where the first holding member 31 is disposed can be inserted into the first fixture 51 in a rectangular shape in the extending direction of the shield conductor 10. Has been.
The insertion portion 60 is formed in a size that is in close contact with a portion of the shield conductor 10 where the first holding member 31 is disposed, and the shield conductor 10 inserted through the insertion portion 60 is a first fixture. Fixed to 51 without rattling.

The insertion portion 60 has a circular recess 60 </ b> A at a position corresponding to the protrusion 38 of the first holding member 31.
The concave portion 60A has a diameter and a depth at which the entire portion of the convex portion 38 penetrating the shield conductor 10 can be inserted with almost no gap.

  As shown in FIG. 13, the second fixture 61 includes a pair of holding pieces 62 and 62 that are divided in the direction along the flat surfaces of the flat electric wires 11 </ b> A to 11 </ b> C. A pair of holding pieces 62 and 62 are closed by a fastening member made up of a bolt 64 and a nut 65 on the opposite side of the hinge portion 63 while being connected to each other by a hinge portion 63 that is an elastic connecting member. It can be fixed with. One holding piece 62 is provided with an attachment portion 67 having an attachment hole 66 for fixing to the wall surface WA inside the vehicle, and a fixing hole 68 provided in the wall surface WA is fixed with a bolt 69. It can be attached with a member.

In the second fixture 61, an insertion portion 70 through which a portion of the shield conductor 10 where the second holding member 41 is disposed can be inserted into the second fixture 61 in a rectangular shape in the extending direction of the shield conductor 10. Has been.
The insertion portion 70 is formed in a size that is in close contact with a portion of the shield conductor 10 where the second holding member 41 is disposed, and the shield conductor 10 inserted through the insertion portion 70 is a second fixture. It is fixed to 61 without rattling.

The insertion portion 70 is formed with a circular recess 70 </ b> A at a position corresponding to the protrusion 48 of the second holding member 41.
The concave portion 70A has a diameter and a depth at which the entire portion of the convex portion 48 penetrating the shield conductor 10 can be inserted with almost no gap.

According to this embodiment, the following effects are produced.
(1) Since the deviation of the braided wire 20 is suppressed by the convex portions 38 and 48 of the electric wire holding member 30, a coarse portion and a fine portion of a local braided mesh are hardly generated, and a decrease in shielding performance can be suppressed.
(2) The shield conductor 10 is attached to the electric wire routing path of the vehicle via the attached fixture 50, and the convex portions 38 and 48 are provided in the concave portions 60A and 70A provided in the attached fixture 50. Therefore, the shield conductor 10 can be positioned on the predetermined flat electric wires 11A to 11C in the vehicle.

(3) Since the outer periphery of the braided wire 20 is covered with the net-like exterior protective material 22 and the convex portions 38 and 48 penetrate the exterior protective material 22, the exterior protective material 22 is attached to the braided wire 20. In addition to being able to improve heat dissipation by being arranged on the outer periphery of the outer periphery, the protrusions 38 and 48 penetrate the exterior protective material 22, so that the displacement of the exterior protective material 22 can be suppressed.
(4) Since the electric wire used for the shield conductor 10 is a flat electric wire 11A to 11C composed of a flat metal conductor portion 13 and an insulating coating 14 covering the periphery of the metal conductor portion 13, there is little dead space. Moreover, since the surface area is large and the heat dissipation is good, in addition to being able to increase the energization current, the flat shape makes it easy to bend and facilitate the wiring of the electric wires.

<Other embodiments>
The present invention is not limited to the embodiments described with reference to the above description and drawings. For example, the following embodiments are also included in the technical scope of the present invention.
(1) In the above embodiment, the electric wires are flat electric wires 11A to 11C having a rectangular cross section. However, the electric wires are not limited thereto, and electric wires having a circular cross section may be used.
(2) In the above embodiment, the number of electric wires is three. However, the number is not limited to this, and may be two or four or more.
(3) In the above embodiment, the convex portions 38 and 48 are configured to penetrate the braided wire 20 and the exterior protective material 22, but may be configured to penetrate only the braided wire 20.
(4) In the above embodiment, the electric wire holding member 30 is made of synthetic resin. However, the electric wire holding member 30 may be made of metal, and when it is made of metal, the electric wire holding member can improve the shielding performance. Become.

DESCRIPTION OF SYMBOLS 10 ... Shield conductor 11A-11C ... Flat electric wire 13 ... Metal conductor part 14 ... Insulation coating 15 ... Terminal metal fitting 20 ... Braided wire 21 ... Gap 22 ... Exterior protection material 23 ... Through-hole 25 ... Shield shell 30 ... Electric wire holding member 31 ... 1st holding member 32, 42 ... accommodating part 33, 43 ... bottom plate part 34, 44 ... side wall part 35 ... 1st partition wall (partition wall)
36, 46 ... locking portions 38, 48 ... convex portion 41 ... second holding member 45 ... second partition wall 50 ... attached fixture 51 ... first fixture 52, 62 ... holding pieces 56, 66 ... mounting hole 57 , 67 ... Attachment portions 58 and 68 ... Attachment holes 60 and 70 ... Insertion portions 60A and 70A ... Recess 61 ... Second fixture CA ... Equipment case WA ... Wall surface in the vehicle

Claims (6)

Multiple wires,
A braided wire formed by braiding metal wires into a mesh shape and covering the plurality of electric wires at once;
An electric wire holding member that integrally holds the plurality of electric wires so as to be in close contact with the outer periphery of each electric wire,
The shield conductor according to claim 1, wherein the electric wire holding member is provided with a convex portion that penetrates the mesh of the braided wire. The shield conductor is attached to the electric wire routing path of the vehicle via an attached fixture,
The shield conductor according to claim 1, wherein the convex portion is positioned by engaging with a concave portion provided in the fixture to be attached. The braided wire has an outer periphery covered with an exterior protective material,
The shield conductor according to claim 1, wherein the convex portion penetrates the exterior protection material. The said electric wire is a flat electric wire which consists of a flat-shaped metal conductor part and the insulation coating which covers the circumference | surroundings of the said metal conductor part, The Claim 1 thru | or 3 characterized by the above-mentioned. Shield conductor. The electric wire holding member is provided with a partition wall that partitions the flat electric wires, and the flat electric wires are arranged side by side through the partition walls in a direction along a flat surface. The shield conductor according to claim 4. The wire holding member includes a first holding member and a second holding member, and the first holding member is disposed at a position closer to the terminal than the second holding member,
The first holding member is provided with a first partition wall that partitions the flat electric wires, and the flat electric wires are arranged side by side through the first partition wall in a direction along a flat surface. And
The second holding member is provided with a second partition wall for partitioning the flat electric wires, and the flat electric wires are arranged side by side through the second partition wall in a direction perpendicular to the flat surface of the flat electric wires. The shield conductor according to claim 4, wherein the shield conductor is formed.

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