JP4511988B2 - Shield conductive path - Google Patents

Description

  The present invention relates to a shield conductive path.

In Patent Document 1, a metal pipe having an electric wire protection function and a flexible shield member are connected, and a plurality of non-shielded electric wires are inserted into the pipe and the flexible shield member at once. A shield conductive path for shielding is disclosed. Such a shield conductive path can be used as a power circuit of an electric vehicle. In this case, a pipe is used as a shield means in the routing route along the floor of the vehicle body, and the route is bent with a small space. A flexible shield member is used as a shield means in the vehicle to be searched.
JP 2004-171952 A

As a form of use of the shield conductive path applied to the electric vehicle, the power circuit wire and the electrical component wire are inserted into the pipe together, and the power is supplied to the outside of the pipe, that is, in the shield region by the flexible shield member. The electric wire for circuit and the electric wire for electrical component can be branched. As a branching means, a branch hole is opened in the flexible shield member through which the electric wire for the power circuit is inserted, and the electric component electric wire is inserted into the branch hole, and the electric component electric wire is inserted into the branch hole. A method of connecting the ends of another flexible shield member for this purpose is conceivable.
However, since both the flexible shield member for power circuits and the flexible shield member for electrical components are easily deformed, connection work is difficult.
The present invention has been completed based on the above-described circumstances, and an object thereof is to facilitate connection of a flexible shield member branched at an end of a pipe.

  As means for achieving the above object, according to the invention of claim 1, the first electric wire and the second electric wire are inserted into a metal pipe, and the lead-out region of the first electric wire from the pipe is cylindrical. The first flexible shield member is inserted, and the end of the first flexible shield member is connected so as to overlap the peripheral surface of the end of the pipe over the entire circumference. The lead wire is led out to the outside of the first flexible shield member from the lead-out hole opened in the peripheral surface of the first flexible shield member, and is at least outside the first flexible shield member in the second electric wire. The lead-out region is inserted into the cylindrical second flexible shield member, and the end portion of the second flexible shield member leaves a partial region in the circumferential direction as a connection portion, and the connection portion The second electric wire is in the second flexible region in a region other than It is configured to be exposed to the outside of the shield member, and the connection portion and the end portion of the first flexible shield member are fixed to the peripheral surface of the pipe by the fixing means so as to be conductive. Have.

  According to a second aspect of the present invention, in the first aspect, the first flexible shield member is formed of a braided wire obtained by knitting metal strands in a mesh shape, and the mesh of the braided wire is elastically expanded. This is characterized in that the lead-out hole is formed.

  According to a third aspect of the present invention, in the first or second aspect of the present invention, the second flexible shield member penetrates the lead-out hole, so that an end portion of the second flexible shield member and The connecting portion is accommodated in the first flexible shield member, and the second electric wire is exposed to the outside of the second flexible shield member inside the first flexible shield member. It has a characteristic where it exists.

  The invention of claim 4 is characterized in that, in the invention of claim 3, the second flexible shield member is formed of a braided wire obtained by braiding metal strands in a mesh shape.

<Invention of Claim 1>
The end portion of the first flexible shield member and the end portion of the second flexible shield member are both connected to each other by being fixed to the end portion of the pipe. According to the present invention, when connecting both flexible shield members that are easily deformed, a pipe that is difficult to deform is used, and therefore, the connection work is easier than when only the flexible shield member is connected. .

<Invention of Claim 2>
Since the opening region of the lead-out hole is narrowed by the elastic restoring force of the braided wire, noise leakage in the lead-out hole can be suppressed, so that the shielding function is high.

<Invention of Claim 3>
Since the exposed part of the second electric wire to the outside of the second flexible shield member is located in the first flexible shield member, it is shielded by the first flexible shield member.

<Invention of Claim 4>
In the lead-out hole, since the second flexible shield member is expanded in diameter by its elastic restoring force, noise leakage in the lead-out hole is suppressed, so that the shield function is high.

<Embodiment 1>
A first embodiment of the present invention will be described below with reference to FIGS. 1 to 3. An engine room is provided in the front part of the vehicle body Bd of the electric vehicle EV to which the shield conductive path Wa of the present embodiment is attached. In the engine room, a gasoline-driven engine Eg and power for driving the travel motor are provided. A device Iv constituting a circuit and a device Pd constituting a power feeding circuit for supplying electric power to the electrical component are provided. A device Bt constituting a power circuit or a power feeding circuit is also provided at the rear part of the vehicle body Bd. An in-vehicle conductive path Wb is connected to the device Bt, a shield conductive path Wa is connected to the front end portion of the in-vehicle conductive path Wb, and the front end portion of the shield conductive path Wa is branched into two parts Iv, Connected to Pd.

The shield conductive path Wa includes three non-shielded first electric wires 10A, three non-shielded three second electric wires 10B, one pipe 20 having both a collective shield function and an electric wire protection function, and a collective Two flexible shield members 30A and 30B having a shield function are provided.
The first electric wire 10A is a form in which the outer periphery of a conductor 11A made of an aluminum alloy single core wire, a copper stranded wire, or the like is surrounded by an insulating coating made of synthetic resin, and the conductor 11A and the insulating coating 12A are both flexible. Therefore, the first electric wire 10A can be bent and deformed. The first electric wire 10A is used as a power circuit. The second electric wire 10B also has a form in which the outer periphery of a conductor 11B made of an aluminum alloy single core wire, a copper stranded wire, or the like is surrounded by a synthetic resin insulating coating 12B, and both the conductor 11B and the insulating coating 12B are flexible. Therefore, the second electric wire 10B can be bent and deformed. The second electric wire 10B has a smaller outer diameter than the first electric wire 10A, and is used as an electrical component circuit.

  The pipe 20 is made of an aluminum alloy, and its cross-sectional shape is a perfect circle. The three first electric wires 10 </ b> A in the pipe 20 are maintained in a positional relationship that forms a substantially stacked shape (a shape that draws a substantially equilateral triangle when the center of the first electric wire 10 </ b> A is connected). The three second electric wires 10B are arranged so as to fit into the recesses between the adjacent first electric wires 10A. Thereby, the three first electric wires 10A and the three second electric wires 10B are bundled in a generally circular shape as a whole. These six electric wires 10 </ b> A and 10 </ b> B are inserted into the pipe 20 and are collectively shielded by the pipe 20.

  The six electric wires 10 </ b> A and 10 </ b> B are led forward from the front end of the pipe 20. The lead-out portions from the pipe 20 in the three first electric wires 10A are collectively shielded by the first flexible shield member 30A by being inserted into the first flexible shield member 30A. In addition, the lead-out portions from the pipe 20 in the three second electric wires 10B are collectively shielded by the second flexible shield member 30B by being inserted into the second flexible shield member 30B. . The rear end portion of the first flexible shield member 30 </ b> A and the rear end portion of the second flexible shield member 30 </ b> B are both connected to the front end portion of the pipe 20 so as to be conductive. That is, the first flexible shield member 30 </ b> A and the second flexible shield member 30 </ b> B are branched into two in front of the pipe 20.

  The first flexible shield member 30A is formed of a cylindrical braided wire made of a copper alloy metal wire, and the rear end portion of the first flexible shield member 30A extends over the entire circumference. The outer periphery of the front end portion of the pipe 20 is covered (overlapped). On the circumferential surface of the first flexible shield member 30A, the mesh is elastically expanded at a position slightly ahead of the front end of the pipe 20, so that the inside and the outside of the first flexible shield member 30A A lead-out hole 31 </ b> A is formed for communicating the. The lead-out region from the pipe 20 in the second electric wire 10B is led out from the first flexible shield member 30A to the outside of the first flexible shield member 30A through the lead-out hole 31A. The first electric wire 10A is inserted into the first flexible shield member 30A without being led out from the lead-out hole 31A.

  Similar to the first flexible shield member 30A, the second flexible shield member 30B is formed of a tubular braided wire made of a copper alloy metal strand knitted in a mesh shape. The rear end portion of the second flexible shield member 30B is inserted into the first flexible shield member 30A from the lead-out hole 31A in a state of being elastically reduced in diameter while surrounding the second electric wire 10B. . In the first flexible shield member 30A, the rear end portion of the second flexible shield member 30B leaves a partial region in the circumferential direction as the connection portion 31B, and a region other than the connection portion 31B. Then, the second electric wire 10B is exposed to the outside of the second flexible shield member 30B. When forming the connecting portion 31B, a braided wire mesh is loosened to form a slit (not shown) extending forward from the rear edge, and the braided wire is bundled together so as to widen the slit. Like that. The bundled connection portion 31B is configured to extend rearwardly in a tail shape (cantilever shape). In the circumferential direction, the region occupied by the connection portion 31B is smaller than the region occupied by the region exposing the second electric wire 10B.

  When connecting the rear end portion of the first flexible shield member 30A and the rear end portion of the second flexible shield member 30B, the connection portion 31B of the second flexible shield member 30B is connected to the outer periphery of the pipe 20. A substantially circular caulking ring 32 (an adhering means which is a constituent element of the present invention) is inserted into the clearance between the rear end portion of the first flexible shield member 30A and the rear end portion outer periphery of the first flexible shield member 30A. It is externally fitted and plastically deformed so that the caulking ring 32 is reduced in diameter. Then, the rear end portion of the first flexible shield member 30A and the rear end portion of the second flexible shield member 30B are clamped between the pipe 20 and the caulking ring 32, Accordingly, the first flexible shield member 30A and the second flexible shield member 30B are fixed to the pipe 20 so as to be conductive, and both the flexible shield members 30A and 30B are connected to be conductive. .

  The region shielded by the pipe 20 in the shield conductive path Wa described above is routed outside the vehicle body Bd, that is, along the floor under the vehicle body Bd, and the shield conductive path Wa and the first flexible shield member 30A and The region shielded by the second flexible shield member 30B is routed through a bent path in the engine room. The front ends of the first electric wire 10A and the first flexible shield member 30A are connected to the device Iv, and the front ends of the second electric wire 10B and the second flexible shield member 30B are connected to the device Pd. The in-vehicle conductive path Wb is a shielded package by surrounding the six electric wires 10A and 10B with a cylindrical braided wire made of a copper alloy metal element braided in a mesh shape, The braided wire is connected to the rear end of the pipe 20 so as to be conductive.

  As described above, in the present embodiment, the rear end portion of the first flexible shield member 30 </ b> A and the rear end portion of the second flexible shield member 30 </ b> B are fixed to the front end portion of the pipe 20. It is connected. That is, in the present embodiment, the pipe 20 that is not easily deformed is used when connecting the two flexible shield members 30A and 30B that are easily deformed. Connection work is easy.

  Further, since the first flexible shield member 30A is formed of a braided wire obtained by braiding metal strands in a mesh shape, and the outlet hole 31A is formed by elastically expanding the mesh of the braided wire, the elasticity of the braided wire is formed. By narrowing the opening area of the lead-out hole 31A by the restoring force, noise leakage in the lead-out hole 31A can be suppressed. Moreover, the second flexible shield member 30B is also formed of a braided wire obtained by braiding metal strands in a mesh shape, and the second flexible shield member 30B is expanded in diameter by the elastic restoring force in the lead-out hole 31A. The leakage of noise in the outlet hole 31A is suppressed. Therefore, the shielding function is also high at the branched portion of the first flexible shield member 30A and the second flexible shield member 30B.

  Further, the second flexible shield member 30B passes through the outlet hole 31A, so that the rear end portion and the connection portion 31B of the second flexible shield member 30B are accommodated in the first flexible shield member 30A. Inside the first flexible shield member 30A, the second electric wire 10B is exposed to the outside of the second flexible shield member 30B. That is, since the exposed portion of the second electric wire 10B to the outside of the second flexible shield member 30B is located in the first flexible shield member 30A, it is shielded by the first flexible shield member 30A. Has been.

<Embodiment 2>
Next, a second embodiment of the present invention will be described with reference to FIGS. In the shield conductive path Wa of the second embodiment, the rear end portion of the second flexible shield member 30B is not inserted into the first flexible shield member 30A from the lead-out hole 31A, and the connection portion 31B is connected to the first flexible shield member Wa. The shield member 30 </ b> A is stacked and fixed on the outer periphery of the rear end portion. Therefore, in the second embodiment, the exposed portion of the second electric wire 10B from the second flexible shield member 30B is located outside the first flexible shield member 30A. Is expanded in the circumferential direction, and the connection portion 31B covers the formation region of the lead-out hole 31A in the first flexible shield member 30A, so that noise leakage in the lead-out hole 31A can be suppressed. Since other configurations are the same as those of the first embodiment, the same configurations are denoted by the same reference numerals, and descriptions of structures, operations, and effects are omitted.

<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-described embodiment, the first flexible shield member is a braided wire. However, according to the present invention, the first flexible shield member may be a sheet of aluminum made into a cylindrical shape.
(2) In the above-described embodiment, the second flexible shield member is a braided wire. However, according to the present invention, the first flexible shield member may be a cylindrical aluminum sheet material.
(3) Although the first flexible shield member and the second flexible shield member have the same form (braided wire) in the above embodiment, according to the present invention, the first flexible shield member and the first flexible shield member The two flexible shield members may have different forms.
(4) In the above embodiment, one second flexible shield member is branched from the first flexible shield member. However, according to the present invention, a plurality of second flexible shield members are formed from one flexible shield member. The flexible shield member may be branched.
(5) In the above embodiment, the first flexible shield member and the second flexible shield member are fixed to the outer periphery of the pipe. However, according to the present invention, both flexible shield members are connected to the inner peripheral surface of the pipe. It is good also as a form which adheres to the outer periphery of a pipe, and adhere | attaches either the 1st flexible shield member or the 2nd flexible shield member on the outer periphery of a pipe, and the other.
(6) In the above embodiment, the area occupied by the connecting portion in the circumferential direction at the end of the second flexible shield member is smaller than the area occupied by the portion exposing the second electric wire. The region occupied by the portion and the region occupied by the portion exposing the second electric wire may be the same, and the region occupied by the connecting portion may be larger than the region occupied by the portion exposing the second electric wire.
(7) In the above embodiment, the fixing means is caulking with caulking. However, according to the present invention, a band for tightening the outer periphery of the pipe, welding, or the like can be used.
(8) In the above embodiment, the outer diameter of the first electric wire is made larger than the outer diameter of the second electric wire. However, according to the present invention, even if the outer diameter of the first electric wire is made smaller than the outer diameter of the second electric wire. Good.
(9) Although the number of first electric wires is three in the above embodiment, according to the present invention, the number of first electric wires may be two or less, or four or more.
(10) In the above embodiment, the number of the second electric wires is three, but according to the present invention, the number of the second electric wires may be two or less, or four or more.
(11) Although the case where the pipe of the shield conductive path is routed outside the vehicle body has been described in the above embodiment, the present invention can also be applied to a shield conductive path where the pipe is routed inside the vehicle body.
(12) Although the case where the shield conductive path is routed to the electric vehicle has been described in the above embodiment, the present invention can also be applied to a shield conductive path routed other than the electric vehicle.
(13) In the above embodiment, the cross-sectional shape of the pipe is circular. However, according to the present invention, the cross-sectional shape of the pipe may be non-circular.

The side view showing the state which wired the shield conductive path in the electric vehicle in Embodiment 1 Sectional drawing showing the branched part of both flexible shield members XX sectional view of FIG. Sectional drawing showing the branch part of both the flexible shield members in Embodiment 2 YY sectional view of FIG.

Explanation of symbols

Wa ... Shield conductive path 10A ... 1st electric wire 10B ... 2nd electric wire 20 ... Pipe 30A ... 1st flexible shield member 30B ... 2nd flexible shield member 31A ... Lead-out hole 31B ... Connection part 32 ... Caulking (adherence) means)

Claims (4)

The first electric wire and the second electric wire are inserted into the metal pipe,
A lead-out region from the pipe in the first electric wire is inserted into a cylindrical first flexible shield member, and an end portion of the first flexible shield member extends over the entire circumference. Connected to overlap the peripheral surface of the part,
The second electric wire is led out to the outside of the first flexible shield member from a lead-out hole opened in the peripheral surface of the first flexible shield member;
At least a lead-out region of the second electric wire to the outside of the first flexible shield member is inserted into the cylindrical second flexible shield member,
The end portion of the second flexible shield member leaves a partial region in the circumferential direction as a connection portion, and the second electric wire is outside the second flexible shield member in a region other than the connection portion. It is supposed to be exposed,
The shield conductive path, wherein the connection portion and the end portion of the first flexible shield member are fixed to the peripheral surface of the pipe by a fixing means so as to be conductive. The first flexible shield member is composed of a braided wire obtained by knitting metal strands in a mesh shape,
The shield conductive path according to claim 1, wherein the lead-out hole is formed by elastically expanding a mesh of the braided wire. When the second flexible shield member penetrates the lead-out hole, the end portion of the second flexible shield member and the connection portion are accommodated in the first flexible shield member,
The shield conductive path according to claim 1 or 2, wherein the second electric wire is exposed to the outside of the second flexible shield member inside the first flexible shield member. 4. The shield conductive path according to claim 3, wherein the second flexible shield member is a braided wire obtained by braiding metal strands in a mesh shape.

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