JP4823561B2 - Shield conductive path - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a structure capable of connecting a flexible shielding member at an end part of a shielding pipe and reinforcing a waterproof property without the existence of other members at an outer periphery of the pipe. <P>SOLUTION: The shielded conductive path Wa is provided with a metal shielding pipe 10, a cylindrical flexible shielding member 20 connected to an end part of shielding pipe 10, and wires 30 shielded by being inserted into the shielding pipe 10 and the flexible shielding member 20. Inside the cylinder of the shielding pipe 10, a support member 40 is arranged so as to surround the plurality of wires 30, and the flexible shielding member 20 is pinched by the shielding pipe 10 and the support member 40 in the cylinder of the shielding pipe 10. <P>COPYRIGHT: (C)2007,JPO&amp;INPIT

Description

  The present invention relates to a shield conductive path.

In Patent Document 1, a metal shield pipe (first shield member) having an electric wire protection function and a flexible shield member (second shield member) made of a braided wire obtained by knitting metal strands in a cylindrical shape. A shield conductive path is disclosed in which a plurality of non-shielded electric wires are connected and shielded collectively by inserting them through a shield pipe and a flexible shield member. Such a shield conductive path can be used as a power circuit of an electric vehicle. In this case, a high-strength shield pipe is used as a shield means in the routing route along the under floor of the vehicle body, and there is no space to bend. A flexible shield member is used as the shield means in the vehicle routed along the route.
JP 2004-171952 A

  As a means for connecting the shield pipe and the flexible shield member, as shown in FIG. 7, the end portion of the flexible shield member 104 is covered with the end portion of the shield pipe 100, and the caulking ring 102 is fitted thereon. A method of sandwiching the caulking ring 102 between the outer periphery of the shield pipe 100 and the inner surface of the caulking ring 102 is conceivable by plastically deforming the caulking ring 102 to reduce the diameter.

  However, in the method as described above, the outer peripheral surface of the plastically deformed caulking ring does not become a smooth curved surface. Therefore, a protector is provided so as to surround the flexible shield member, and the end of the protector and the shield pipe are provided. In order to waterproof the gap with the end of the shield, it is necessary to lengthen the protector so as to surround the caulking ring, and to extend the end of the protector to a position corresponding to the outer peripheral surface of the shield pipe. In other words, such a configuration inevitably increases the size of the protector.

  In addition, since the shield pipe and the flexible shield member are slightly different in purpose and application, they are often made of different metal materials, but when both shield members are made of different materials, On the other hand, there is a problem that the connection part is likely to deteriorate due to electric corrosion. On the other hand, when a part of the shield conductive path is exposed to the outside, the connection part has an impact from the outside (for example, stone jumping, etc.) ) In any case, further strengthening of protection is required for the joint portion of both shield members.

  The present invention has been made based on the above circumstances, and in connecting the first shield member made of a metal pipe and the second shield member having flexibility, the outer periphery of the shield pipe is connected. It is an object of the present invention to provide a configuration that does not require any members and that can further protect the shield members.

As means for achieving the above object, the invention of claim 1
A plurality of electric wires formed by surrounding a conductor with an insulating coating;
A first shield member made of a metal pipe through which the plurality of electric wires are inserted;
A second shield member that is arranged adjacent to the first shield member and has flexibility so as to cover the periphery of the plurality of electric wires;
With
A support member is disposed so as to surround the plurality of electric wires in the cylinder of the first shield member, and the second shield member is connected to the first shield member and the support in the cylinder of the first shield member. It is characterized by being sandwiched between members.

The invention of claim 2 is the shield conductive path according to claim 1,
The support member is fixed to the plurality of electric wires by insert molding.

The invention according to claim 3 is the shield conductive path according to claim 1 or 2,
A portion of the first shield member that sandwiches the second shield member is crimped.

<Invention of Claim 1>
According to the configuration of the first aspect, as a connecting means for the first shield member and the second shield member, the support member is provided in the cylinder of the first shield member, and the second member is provided between the support member and the first shield member. Since the shield member is sandwiched, there is no other member for connection on the outer periphery of the first shield member, and the structure becomes neat.
Further, since the inside of the first shield member is a connection position for connecting the first shield member and the second shield member, the connection is made at a deeper position, and the waterproof near the connection position is further improved. Strengthened.
Furthermore, since both shield members are connected in the cylinder of the first shield member, the connection structure is strong against vibration and impact. That is, even if some external force (for example, an external force due to a stone jump or the like) is applied from the outside, the connection position of both shield members is firmly protected by the first shield member made of metal, and stable holding is achieved. .

<Invention of Claim 2>
If it is set as the structure which fixes a support member to a some electric wire by insert molding like the structure of Claim 2, a support member can be comprised simply and alignment with a support member and a some electric wire is performed easily. be able to.

<Invention of Claim 3>
If the part which clamps the 2nd shield member in a 1st shield member is made into the structure crimped like the structure of Claim 3, both shield members and support will be carried out without interposing another member outside the 1st shield member. The member can be fixed easily and firmly.

<Embodiment 1>
Hereinafter, a first embodiment of the present invention will be described with reference to the drawings.
As shown in FIGS. 1 and 2, the shield conductive path Wa of the present embodiment is used, for example, as a power circuit of an electric vehicle, and includes a shield pipe 10 (shield pipe 10 having both a collective shield function and a wire protection function). Corresponds to a first shield member), a flexible shield member 20 having a collective shield function, and a plurality of non-shield type electric wires 30.

  An electric vehicle to which the shield conductive path Wa is applied includes, for example, an engine room at a front portion of a vehicle body, and an inverter and a gasoline-driven engine are accommodated in the engine room, while a battery ( A power battery) is mounted. In such an electric vehicle, the shield conductive path Wa can be used as a power circuit between the inverter and the battery. The application place is not limited to this, and the target electric vehicle is not limited to this type of arrangement configuration.

The shield pipe 10 constituting the shield conductive path Wa is made of metal (for example, aluminum alloy, copper alloy, etc.), and its cross-sectional shape is a perfect circle as shown in FIG. 2 shows a cross-sectional shape in the vicinity of a caulking portion 10a, which will be described later, but the other cross-sectional shapes are also perfect circles.
The flexible shield member 20 corresponds to the second shield member in the claims, and is composed of a cylindrical braided wire in which metal (for example, copper alloy) strands are knitted in a mesh shape. It can be freely bent and deformed. The front end portion (left end portion in FIG. 1) of the flexible shield member 20 is connected to the rear end portion of the shield pipe 10 so as to be conductive by connection means described later.

  As shown in FIG. 2, the electric wire 30 has a known form in which the outer periphery of a conductor 32 made of an aluminum alloy single core wire, a copper stranded wire, or the like is surrounded by a synthetic resin insulating coating 34. Since the insulating coating 34 is flexible, the electric wire 30 can be bent and deformed. The plurality of electric wires 30 are inserted into the shield pipe 10 and the flexible shield member 20, and are shielded collectively by the shield pipe 10 and the flexible shield member 20.

Next, a connection structure between the shield pipe 10 and the flexible shield member 20 will be described.
As shown in FIG. 1, in this embodiment, a support member 40 is used as a connection means for connecting the shield pipe 10 and the flexible shield member 20.
FIG. 3 is a view showing an integrated part 50 in which the support member 40 is insert-molded on the electric wire 30, and FIG. 4 is a cross-sectional view taken along the line BB in FIG. 3. As shown in FIGS. 3 and 4, the support member 40 is fixed to the plurality of electric wires 30 by insert molding of a resin material. In this insert molding, a metal caulking underlay ring 42 is formed integrally with the resin portion 41 on the outer peripheral portion of the resin portion 41 made of a resin material, and the support member is formed by the resin portion 41 and the caulking underlay ring 42. 40 is configured. The outer peripheral surface of the caulking underlay ring 42 and the outer peripheral surface of the support member 40 where the caulking underlay ring 42 is not provided are configured to be substantially flush with each other.

  Further, as shown in FIG. 4, the support member 40 has a circular shape whose outer peripheral surface is continuous over the entire circumference. As shown in FIG. 3, the outer diameter of the support member 40 is constant from the front end to the rear end, and as shown in FIG. 1, the outer diameter of the support member 40 is approximately the same as or slightly smaller than the inner diameter of the caulking portion 10 a of the shield pipe 10. Has been.

  As shown in FIG. 1, the support member 40 configured as described above is disposed so as to surround a plurality of electric wires 30 in the cylinder of the shield pipe 10, and the flexible shield member 20 is configured to In the cylinder, it is sandwiched between the support member 40 and the shield pipe 10. Specifically, a portion of the shield pipe 10 that sandwiches the flexible shield member 20 is crimped to form a crimped portion 10 a that sandwiches the flexible shield member 20 together with the support member 40.

  Next, a connection procedure between the shield pipe 10 and the flexible shield member 20 will be described with reference to FIG. When connecting, first, as shown in FIG. 5, the front end portion of the flexible shield member 20 is covered with the support member 40, and then both the members 20 and 40 are inserted into the shield pipe 10 from the rear. After the insertion, the shield pipe 10 is crimped so as to reduce the diameter at a position separated from the rear end edge by a predetermined distance.

  When crimped, as shown in FIG. 1, the crimped portion 10 a of the shield pipe 10 is pressed against the support member 40, and the flexible shield is formed by the inner peripheral surface of the shield pipe 10 and the outer peripheral surface of the support member 40. The member 20 is clamped. In the sandwiched state, the front end portion of the flexible shield member 20 is elastically sandwiched in the radial direction between the outer peripheral surface of the support member 40 and the rear end portion inner peripheral surface of the shield pipe 10, and this is caused by the sandwiching. Due to the frictional resistance, the flexible shield member 20 is held in a conductively connected state with respect to the shield pipe 10 in a state where relative displacement in the front-rear direction (axial direction) is restricted. Further, the support member 40 is also fixed without relative displacement in the front-rear direction with respect to the shield pipe 10 and the flexible shield member 20 due to frictional resistance.

  According to the configuration of the present embodiment, as a connecting means between the shield pipe 10 as the first shield member and the flexible shield member 20 as the flexible shield member 20, the support member 40 is provided in the cylinder of the shield pipe 10, Since the flexible shield member 20 is sandwiched between the support member 40 and the shield pipe 10, there is no connection other member on the outer periphery of the shield pipe 10, and the structure is neat. As a result, as shown in FIG. 1, when the protector 60 is provided so as to surround the flexible shield member 20 and the gap between the end of the protector 60 and the end of the shield pipe 10 is to be waterproofed, the protector 60 Can be effectively suppressed. That is, in comparison with the configuration required in the case as shown in FIG. 7 (a configuration in which the protector is lengthened so as to surround the caulking ring and the end of the protector is extended to a position corresponding to the outer peripheral surface of the shield pipe), Since the end of the protector 60 can be brought closer to the end of the shield pipe 10 as shown in FIG. 1, an increase in the size of the protector can be effectively avoided.

  In addition, since the inside of the shield pipe 10 is a connection position for connecting the shield pipe 10 and the flexible shield member 20, the connection is made at a deeper position, and the waterproof near the connection position is further improved. Strengthened. Further, since the shield members 10 and 20 are connected in the cylinder of the shield pipe 10, the connection structure is strong against vibration and impact. That is, even if some external force (for example, an external force due to a stone jump or the like) is applied from the outside, the connection position of the shield members 10 and 20 is firmly protected by the metal shield pipe 10 and can be stably maintained. It becomes.

  In particular, when this type of shield conductive path is used as a power circuit for an electric vehicle, depending on the vehicle model, the shield conductive path is routed from a device (for example, an inverter device) provided in the engine room at the front of the vehicle body. It may be possible to reach a device (for example, a battery or a rear wheel drive motor) disposed at the rear of the vehicle body, and a configuration in which a part is exposed to the outside during the routing process is also conceivable. In particular, when the shield conductive path is routed along the under floor of the vehicle body, it is easily affected by water and stones from below the vehicle body, and the protection of the connection position is required more severely. Such a configuration is more useful in such a configuration.

  Moreover, since it is set as the structure which fixes the supporting member 40 to several electric wires by insert molding, the supporting member 40 can be comprised easily and position alignment with the supporting member 40 and several electric wires can be performed easily.

  Further, the portion of the shield pipe 10 that sandwiches the flexible shield member 20 is crimped, and the flexible shield member 20 is sandwiched between the crimped portion 10a and the support member 40. Both shield members and the support member 40 can be easily and firmly fixed without interposing any members.

  In the present embodiment, the connection position between the shield pipe 10 and the flexible shield member 20 is a position separated from the end of the shield pipe 20 by a predetermined distance in the cylinder of the shield pipe 10. Therefore, even if water approaches the end portion of the shield pipe 10, it is difficult to reach the connection position, and double protection is achieved.

  Further, the wire 30 is restrained from moving in the radial direction by the support member 40 at the end of the shield pipe 10. Therefore, it becomes difficult for the electric wire 30 to contact the end part of the shield pipe 10, and the concern about the electric wire rubbing at the pipe edge can be effectively eliminated.

<Embodiment 2>
A second embodiment will be described with reference to FIG. FIG. 6 is a cross-sectional view illustrating a shield conductive path according to the second embodiment.
In the second embodiment, the shape of the connection portion of the flexible shield member 20 with the shield pipe 10 (that is, the shape of the support member) is different from that of the first embodiment. Other configurations (shield pipe 10, flexible shield member 20, electric wire 30 and the like) are the same as those in the first embodiment. Therefore, the same components are denoted by the same reference numerals, and the description of the structure, operation, and effect is omitted. Omitted.

  In the present embodiment, the support member 70 is constituted by a metal ring member, and the flexible shield member 20 is sandwiched between the support member 70 and the caulking portion 10 a of the shield pipe 10. This configuration can be realized by caulking the support member 70 covered with the flexible shield member 20 as in the first embodiment. In this configuration, unlike the first embodiment, the electric wire 30 can move relative to the support member 70.

<Other embodiments>
The present invention is not limited to the embodiment 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, and further, within the scope not departing from the gist of the invention other than the following. Various modifications can be made.
(1) In the above embodiment, the shape of the shield pipe is circular. However, according to the present invention, the cross-sectional shape of the shield pipe may be non-circular (elliptical, oval, etc.). In this case, the support member also has a cylindrical shape similar to the shield pipe.
(2) In the above embodiment, the outer peripheral surface of the support member is a continuous cylindrical shape over the entire circumference. However, according to the present invention, the support member may have a substantially cylindrical shape such as a C-shaped cross section.
(3) In the above embodiment, the flexible shield member is a braided wire. However, according to the present invention, the flexible shield member may be a member other than the braided wire, such as an aluminum sheet material or a corrugated wire. Good.
(4) In the above embodiment, the end portion of the flexible shield member 20 is processed away from the electric wire 30, but the end portion of the flexible shield member 20 is fixed to the electric wire 30 (for example, fixed by tape or the like). ).

Sectional drawing which illustrates the shield conductive path which concerns on Embodiment 1 of this invention Sectional drawing cut | disconnected in the AA position of FIG. The figure which shows the integral part which insert-molded the support member to the electric wire Sectional drawing cut | disconnected in the BB position of FIG. Explanatory drawing explaining a part of manufacturing process of a shield conductive path Sectional drawing which illustrates the shield conductive path concerning Embodiment 2 A diagram illustrating a conventional shield conductive path

Explanation of symbols

Wa: shield conductive path 10: shield pipe (first shield member)
20: Flexible shield member (second shield member)
30 ... Electric wire 32 ... Conductor 34 ... Insulation coating 40 ... Support member

Claims (3)

A plurality of electric wires formed by surrounding a conductor with an insulating coating;
A first shield member made of a metal pipe through which the plurality of electric wires are inserted;
A second shield member that is arranged adjacent to the first shield member and has flexibility so as to cover the periphery of the plurality of electric wires;
With
A support member is disposed so as to surround the plurality of electric wires in the cylinder of the first shield member, and the second shield member is connected to the first shield member and the support in the cylinder of the first shield member. A shield conductive path characterized by being sandwiched between members. The shield conductive path according to claim 1, wherein the support member is fixed to the plurality of electric wires by insert molding. The shield conductive path according to claim 1, wherein a portion of the first shield member that sandwiches the second shield member is crimped.

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