JP5479129B2 - Wire Harness - Google Patents

Description

  The present invention relates to a wire harness formed by inserting a flexible shield member and an electric wire through a cylindrical body.

  In a vehicle using an electric motor as a driving source such as an electric vehicle EV, a hybrid vehicle HEV, or a fuel cell vehicle FCV, a wire harness is used to connect the battery and the inverter or the inverter and the electric motor. In particular, a wire harness used for an electric vehicle or the like is sometimes routed outside a room such as a floor, so that watertightness and chipping resistance (prevention of flying stones) are required in addition to electromagnetic shielding properties.

  As this kind of wire harness, a plurality of electric wires are collectively surrounded by a metal pipe, and the metal pipe is three-dimensionally bent along the wiring path of the wire harness (patent) Reference 1).

JP 2004-171952 A

  However, in order to collectively enclose a plurality of electric wires with a rigid pipe, it is necessary to use a rigid pipe that is thicker than the bundle of electric wires. Therefore, before assembling to the vehicle, connect the wire harness along the routing route. When bending three-dimensionally, there is a problem that a large-scale bending apparatus capable of bending a thick rigid pipe is required.

  The problem to be solved by the present invention is a wire harness that is easy to bend three-dimensionally along the routing route and that is held in a shape along the routing route and has excellent workability in assembling to a vehicle. Is to provide.

  In the present invention, a plurality of electric wires, a flexible shield member that collectively surrounds the plurality of electric wires, a flexible cylinder that surrounds the shield member, and the electric wires are routed The above-mentioned problem is solved by providing a wire harness characterized by comprising a bone member that is formed in a shape according to a route to be formed and bound to the cylindrical body.

  In the present invention, a plurality of electric wires, a flexible shield member that collectively surrounds the plurality of electric wires, a flexible cylinder that surrounds the shield member, and the electric wires The above-mentioned problems are solved by providing a wire harness comprising a bone member formed in a shape corresponding to a route to be routed and surrounded by the cylindrical body.

  In the above invention, the bone member can be configured to be thinner than the diameter of the cylindrical body.

  In the above invention, the bone member can be configured to have a hollow portion.

  In the above invention, the bone member may be made of a metal material.

  In the above invention, the cylindrical body can be constituted by a colored corrugated tube.

  In the above invention, the electric wire may be connected between devices mounted on an automobile, and the cylindrical body may be routed behind the floor of the automobile body.

  According to the present invention, a plurality of electric wires and a flexible shield member are collectively surrounded by a cylindrical body having flexibility, and a shape corresponding to the wiring route of the electric wires is formed inside or outside the cylindrical body. Since the formed bone member is arranged, it is possible to hold the flexible electric wire and the shield member in a shape along the routing path without using a rigid pipe that collectively surrounds a plurality of electric wires, A lightweight wire harness can be provided. As a result, the wire harness excellent in assembly workability can be provided.

  In addition, according to the present invention, the bone member formed in a shape corresponding to the route in which the electric wires are routed does not require a thickness that collectively surrounds the plurality of electric wires. It can be processed with the equipment. As a result, it is possible to reduce the labor and cost required for bending three-dimensionally along the routing path.

It is a bottom view (floor back view) which shows the electric vehicle to which the wire harness of one Embodiment of this invention is applied. It is a side view which shows the electric vehicle of FIG. It is a block diagram which shows the drive system of the electric vehicle of FIG. It is a perspective view which shows a part of wire harness and bone member of FIGS. It is sectional drawing which follows the VV line of FIG. It is sectional drawing equivalent to the VV sectional view taken on the line of FIG. 1 which shows other embodiment of this invention. It is a perspective view which shows the whole wire harness and bone member of FIGS. FIG. 2 is an enlarged plan view corresponding to a Z portion in FIG. 1. It is sectional drawing which follows the IX-IX line of FIG.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings.

  1 to 3 are diagrams showing an electric vehicle to which an embodiment of the present invention is applied. 1 is a bottom view (floor back view) showing an electric vehicle 2 to which a wire harness 1 according to an embodiment of the present invention is applied, FIG. 2 is a side view of the electric vehicle 2 in FIG. 1, and FIG. 3 is an electric vehicle in FIG. It is a block diagram which shows the drive system.

  In this embodiment, an example will be described in which the wire harness according to the present invention is applied to a power supply line that connects an electric motor and an inverter of an electric vehicle using an electric motor as a travel drive source.

  However, the wire harness according to the present invention can be applied not only to the power supply line between the inverter and the electric motor of the electric vehicle but also to the power supply line between the battery and the inverter. In addition to the electric vehicle using an electric motor as a travel drive source, a hybrid vehicle using both an internal combustion engine and an electric motor as a travel drive source, or a battery including a secondary battery, in addition to the one described in this example. And fuel cell vehicles powered by fuel cells.

  As shown in FIGS. 1 and 2, in the electric vehicle 2 of this example, the electric motor 24 is disposed in a front trunk room 212 (so-called engine room), while a battery 22 (including an auxiliary battery 22a) and an inverter are arranged. Reference numeral 23 denotes a rear trunk room 213. For this reason, the wire harness 28 for the power supply line (DC) that connects the battery 22 and the inverter 23 is routed in the rear trunk room 213, but the power supply line (AC) that connects the inverter 23 and the electric motor 24. ) Wire harness 1 is routed from the rear trunk room 213 to the front trunk room 212 through the floor 211 of the vehicle body 21.

  In addition, an ECU (Electronic Control Unit) that supplies electric power to actuators of various electrical components is fixed under the console box of the passenger seat adjacent to the front trunk room 212, and the auxiliary battery 22a is disposed in the rear trunk room 213. Therefore, the accessory cable 11 </ b> A that connects the accessory battery 22 a and the ECU can also be routed along the wire harness 1.

  As shown in FIG. 3, the electric vehicle 2 of this example includes a battery 22 made of a secondary battery such as a lithium ion battery, an inverter 23 that converts DC power of the battery into AC power, and three driving drive sources. The output of the electric motor 24 is transmitted to the drive wheels 27 and 27 via a transmission 25 and a differential gear 26 that are provided with a phase AC electric motor 24 and are connected to an output shaft 24 a of the electric motor 24.

  The inverter 23 includes a circuit in which two switching elements (transistors Tr) connected in series are connected in parallel in three columns, and the six switching circuits are switched by a predetermined drive signal, so that the battery 22 This is a power conversion device that converts DC power into three-phase AC power. In addition, when the electric motor 24 is regenerated, the regenerated AC power can be converted into DC power by the inverter 23 and the battery 22 can be charged with this.

  Moreover, the electric vehicle 2 of this embodiment can be provided with the converter 23a, as shown in FIG. The converter 23a converts the regenerated AC power into DC power, steps down the voltage to 12V, and charges the auxiliary battery 22a. The electric power stored in the auxiliary battery 22a is supplied to electrical components such as a door opening / closing and a turn signal lamp (direction indicator lamp) through an ECU (Electronic Control Unit).

  As shown in FIGS. 1 and 2, the underbody of the vehicle body 21 of the electric vehicle 2 of the present example on which these devices are mounted includes a dash panel 215 that partitions the front trunk room 212 and the vehicle interior 214, and a floor in the vehicle interior. The front floor panel 216 constituting the surface, the rear floor panel 217 constituting the floor surface of the rear trunk room 213, and the extension panel 218 connecting the front floor panel 216 and the rear floor panel 217 are joined by welding or the like.

  Then, the wire harness 1 for the power supply line (AC) that connects the inverter 23 and the electric motor 24 to the vehicle body structure is connected from the rear trunk room 213 in which the inverter 23 is mounted to the rear floor panel 217 as shown in FIG. It is inserted into the floor 211 through the established hole, and from here to the rear end of the front floor panel 216 along the surface of the extension panel 218, and from here to the surface of the floor behind 211 of the front floor panel 216. It is routed and reaches the lower end of the dash panel 215, rises along the surface of the dash panel 215, and is routed to the electric motor 24. As described above, the accessory cable 11 </ b> A that connects the accessory battery 22 a and the ECU can also be routed along the same route as the wire harness 1.

  Hereinafter, based on FIG.4 and FIG.5, each member which comprises the wire harness 1 which concerns on embodiment of this invention is demonstrated. 4 is a perspective view showing a part of the wire harness 1 of FIG. 1, and FIG. 5 is a cross-sectional view of the wire harness 1 of FIG.

  As shown in the figure, the wire harness 1 of the present embodiment includes three electric wires 11 for three-phase AC power (U, V, W phase) and flexibility that collectively surrounds these electric wires 11. A shield member 12, a flexible cylinder 13 surrounding the shield member 12, and a bone member 14 bound to the cylinder 13 by a binding member 15.

  The shield member 12 surrounding the electric wire 11 is made of a metal having electromagnetic wave shielding properties such as aluminum, stainless steel, copper, an aluminum alloy, or a copper alloy. The shield member 12 of the present embodiment is composed of a braided member in which conductive metal fine wires are knitted in a net shape. Thus, the shield member 12 made of a braided member has flexibility and can be bent in any direction. Moreover, the shield member 12 can also be comprised with a metal tube, and can also be comprised with the metal foil tape wound around the electric wire 11. FIG.

  The cylinder 13 of the present embodiment is made of a resin such as nylon, polyester, or polypropylene. Although not particularly limited, it is desirable that the cylindrical body 13 is made of a resin material having heat resistance and scratch resistance. Further, the tubular body 13 of the present embodiment is formed in a so-called bellows shape having a waveform whose diameter is alternately increased and decreased along the axial direction. A portion formed in this waveform is referred to as a bellows portion 131. The waveform shape (corrugated shape) constituting the bellows portion 131 of this example is not particularly limited, and includes a combination of spiral peaks and valleys, a single peak and valley combination, and a so-called interlock tube structure. . By wrapping the electric wire 11 and the shield member 12 with the cylindrical body 13 having such a flexible bellows portion 131, water tightness and chipping resistance are ensured, and at the time of transportation, it is deformed into a desired shape and is loaded in a package volume. Can be reduced.

  The cylindrical body 13 of the present embodiment is a colored corrugated pipe 13 including a bellows portion 131 that is molded using a resin containing a coloring material. Although not particularly limited, it is possible to indicate that the internal voltage is high by setting the color of the corrugated tube 13 to yellow, orange, or red. By the way, it is a request based on Japanese laws and regulations to place high-voltage parts in orange, but when coloring metal shield members, oil removal, undercoating (rust prevention treatment, adhesion improvement treatment), There is a problem in that a metal coating process including top coating is required and manufacturing costs are increased. On the other hand, in this embodiment, since the cylinder 13 can be shape | molded using resin containing a coloring material, manufacturing cost can be reduced rather than the case where metal coating is carried out.

  The bone member 14 of the present embodiment is a rigid rod-shaped body made of metal or resin that is formed in advance in a shape corresponding to the route through which the electric wire 11 is routed. The bone member 14 is disposed on the outer peripheral surface side along the extending direction of the cylindrical body 13, and is bound to the cylindrical body 13 by the binding member 15. As will be described in detail later, the bone member 14 of the present embodiment is formed along substantially the entire path (part excluding both ends connected to the device) in which the electric wire 11 is routed. Since the bone member 14 has rigidity, it is possible to keep almost the whole of the flexible wire 11, the shield member 12, and the cylindrical body 13 (parts excluding both ends connected to the device) in a predetermined shape. it can. However, it is also possible to form the bone member 14 along a part of the path instead of the entire path.

  As shown in FIG. 5, the bone member 14 of the present embodiment is configured such that its diameter is smaller than the diameter of the cylindrical body 13. Although not particularly limited, the bone member 14 can be made thinner than the diameter of the circumscribed circle of the shield member 12 covering the plurality of electric wires 11 or the diameter of the circumscribed circle of the bundle of plural electric wires. Thus, since the bone member 14 can be configured to be thinner than when the bundle of the electric wires 11 is collectively surrounded, the wire harness 1 can be reduced in weight. As a result, assembly workability when the wire harness 1 is routed on the back side of the vehicle body 21 of the automobile 2 can be improved.

  Thus, by forming the bone member 14 to be thinner than the cylindrical body 13, when forming the bone member 14 into a predetermined shape, a large-scale bending apparatus is not required, and a small-scale bending apparatus. Can be processed. As a result, it is possible to provide a wire harness that can be easily three-dimensionally bent along the routing path and that can reduce manufacturing costs.

  Moreover, as shown in FIG.4 and FIG.5, the bone member 14 of this embodiment can be made into the pipe | tube structure which has a hollow part. Thus, by making the bone member 14 into a tube structure, the accessory cable 11A for connecting the auxiliary battery 22a and the ECU can be inserted into the hollow portion of the bone member 14 as shown in FIG. In this way, by inserting the auxiliary machine cable 11A through the bone member 14, the auxiliary machine cable 11A arranged in the floor 211 of the vehicle body 21 can be protected from external damage and chipping resistance can be improved.

  Furthermore, the bone member 14 of this embodiment can be comprised from metals, such as aluminum, stainless steel, copper, an aluminum alloy, or a copper alloy. Thus, by constituting the bone member 14 from a metal having electromagnetic wave shielding performance, as shown in this example, when the auxiliary machine cable 11A is inserted through the bone member 14, the auxiliary machine cable 11A is shielded. can do. In particular, if the cable is arranged adjacent to the high voltage electric wire 11, noise from the electric wire 11 is easy to ride on the auxiliary voltage cable 11 </ b> A, but the generation of noise is suppressed by inserting the bone member 14 having electromagnetic wave shielding performance. can do.

  In addition, the shape of the bone member 14 can also be made into the solid cylindrical shape without a hollow part. In this case, the auxiliary machine cable 11A can be inserted into the cylindrical body 13, and the auxiliary machine cable 11A can be surrounded by the cylindrical body 13 to be protected.

  Alternatively, the bone member 14 may be made of a heat-resistant resin material such as polyamide resin, vinylidene chloride resin, epoxy resin, or fluororesin instead of metal. Also in this case, the auxiliary member cable 11 </ b> A can be inserted into the cylindrical body 13 with the shape of the bone member 14 being a solid columnar shape having no hollow portion. Of course, the resin-made bone member 14 may have a tube structure, and the auxiliary machine cable 11 </ b> A may be inserted through the hollow portion of the bone member 14. By making the bone member 14 made of resin, the wire harness 1 can be made lighter than when made of metal.

  The bone member 14 of this embodiment is arrange | positioned along the extension direction on the outer peripheral surface of the cylinder 13, as shown in the figure, and is bound to the cylinder 13 by the binding member 15. FIG. Although not particularly limited, the binding member 14 may be a resin insulation lock, a heat-shrinkable resin band, a tape having an adhesive surface, a metal fastener, or the like.

  By tying together with the bone member 14, the flexible electric wire 11, the auxiliary machine cable 11A, the shield member 12, and the cylindrical body 13 are maintained in a three-dimensional shape along the routing path of the electric wires 11, 11A. Therefore, handling in assembly work can be facilitated.

  In addition, as shown in FIG. 6, the bone member 14 can be inserted into the cylindrical body 13 so that the bone member is surrounded by the cylindrical body 13. In this case, the bone member 14 may be inserted from the end portion of the cylindrical body 13, but the bone member 14 may be inserted from a cut formed along the extending direction of the cylindrical body 13. When the cut is formed along the extending direction of the cylindrical body 13, the bone member 14 is inserted and then a tape having an adhesive surface is wound around the cylindrical body 13 so that the bone member, the cylindrical body 13, etc. It is desirable to bind them together.

  In this example, the bone member 14 has a tube structure having a hollow portion, and the auxiliary machine cable 11A is inserted through the hollow part. However, the bone member 14 has a solid columnar shape, and the auxiliary machine cable 11A is It can be arranged inside or outside the cylinder 13. Even when the bone member 14 has a tubular structure, the auxiliary machine cable 11A can be disposed inside or outside the cylindrical body 13 without being inserted into the hollow portion of the bone member 14.

  Next, the assembly and attachment method of the wire harness 1 will be described.

  First, the bone member 14 is prepared. As shown in FIG. 7, the bone member 14 is formed along substantially the entire path (part excluding both ends connected to the device) in which the electric wire 11 is routed.

  Further, an electric wire 11 and a shield member 12 surrounding the electric wire 11 are inserted through the cylindrical body 13 shown in FIG. A connector 1 a connected to the input / output terminal of the electric motor 24 is attached to one end of the electric wire 11, and a connector 1 b connected to the input / output terminal of the inverter 23 is attached to the other end.

  Incidentally, in this embodiment, the cylinder 13 surrounding the bone member 14, the electric wire 11, and the shield member 12 can be separately prepared and transported to an electric vehicle assembly factory by a truck or the like. In the present embodiment, since the shield member 12 is formed of a braid and the cylinder 13 has a tube structure having the bellows portion 131, the cylinder 13 into which the electric wire 11 and the shield member 12 are inserted is three-dimensionally acceptable. It has flexibility. For this reason, since it can deform | transform into a desired shape at the time of conveyance, the package volume can be made small. As a result, the cost for conveyance can be reduced.

  By the way, as described above, it is preferable that the wire harness 1 has flexibility at the time of transportation. However, if the wiring harness 1 is routed from the rear trunk room 213 to the front trunk room 212 of the electric vehicle 2, the wire harness 1 is 3 Since it becomes a long thing of about ~ 4 m, when assembling to the vehicle body 21, the shape of the wire harness 1 may become unstable, and workability may be reduced.

  In this example, before the transportation is finished and assembled to the electric vehicle 2, the wire harness 1 is bound to the bone member 14 formed in a three-dimensional shape along the routing route of the electric wires 11, 11A by using the binding member 15. After assembling, it is assembled to the vehicle body 21.

8 and 9 are diagrams showing the wire harness 1 that is bound and assembled to the vehicle body 21. FIG. 8 is an enlarged plan view showing a Z portion in FIG. 1, and FIG. 9 is a cross-sectional view taken along line IX-IX in FIG.

  The bundling member 15 of this example is made of a rigid metal or resin, and binds the cylinder 13 and the bone member 14 together. The bundling member 15 shown in the figure includes a pair of holding portions that sandwich and hold the cylinder body 13 and the bone member 14 from both sides, and the pair of holding portions that sandwich the cylinder body 13 and the bone member 14. By fastening with the bolt 151a, the cylinder 13 and the bone member 14 can be bound.

  Thus, the electric wire 11, the shield member 12, and the cylindrical body 13 can maintain the shape along the routing route by being tied to the bone member 14.

  When the overall shape of the wire harness 1 is held along the routing route, the wire harness 1 is brought close to the floor 211 of the vehicle body 21 and is pre-welded to the front floor panel 216 as shown in FIGS. The binding member 15 is fixed to the fixing bracket 219 of the wire harness 1 with the bolt 151b. As a result, the wire harness 1 is fixed to the floor 211 of the vehicle body 21.

  In this example, since the wire harness 1 is fixed to the vehicle body 21 using the binding member 15 that binds the bone member 14 and the cylindrical body 13, there is also an advantage that a dedicated fixing component can be omitted.

  When the bone member 14 is inserted through the cylinder 13 as shown in FIG. 6, the binding member 15 shown in FIGS. 8 and 9 can be used as a fixing component for fixing the wire harness 1 to the vehicle body 21. .

  As described above, according to this embodiment of the present invention, the electric wire 11, the shield member 12, and the cylindrical body 13 are arranged by the bone member 14 without using a rigid pipe that collectively surrounds a plurality of electric wires. Since it can hold | maintain in the shape along a cable path, a lightweight wire harness can be provided. As a result, the wire harness excellent in assembly workability can be provided.

  In addition, in the present embodiment, since the bone member 14 is disposed in the entire path in which the electric wire 11 is routed, the shapes of the flexible electric wire 11, the shield member 12, and the cylindrical body 13 are maintained during the assembly operation. Therefore, the wire harness excellent in assembly workability can be provided.

  In addition, according to the present invention, the bone member 14 formed in a shape corresponding to the route in which the electric wires are routed does not require a thickness that collectively surrounds the plurality of electric wires. It can be processed with the equipment for. As a result, it is possible to reduce the labor and cost required for bending three-dimensionally along the routing path.

  The embodiment described above is described for facilitating understanding of the present invention, and is not described for limiting the present invention. Therefore, each element disclosed in the above embodiment is intended to include all design changes and equivalents belonging to the technical scope of the present invention.

  For example, instead of the layout of the battery 22, the inverter 23, and the electric motor 24 shown in FIGS. 1 and 2, the battery 22 can be arranged in the rear trunk room, and the inverter 23 can be arranged in the front trunk room. In this case, it is preferable to apply the wire harness according to the present invention to the wire harness 28 for the power supply line (direct current) connecting the battery 22 and the inverter 23.

DESCRIPTION OF SYMBOLS 1 ... Wire harness 1a, 1b ... Connector 11 ... Electric wire 11A ... Auxiliary cable 12 ... Shield member 13 ... Cylindrical body 131 ... Bellows part 14 ... Bone member 15 ... Bundling member 151a, 151b ... Bolt 2 ... Electric vehicle 21 ... Car body 211 ... Back floor 212 ... Front trunk room 213 ... Rear trunk room 214 ... Vehicle interior 215 ... Dash panel 216 ... Front floor panel 217 ... Rear floor panel 218 ... Extension panel 219 ... Fixing bracket 22 ... Battery 23 ... Inverter 24 ... Electric motor 25 ... Transmission 26 ... Differential gear 27 ... Drive wheel 28 ... Wire harness for power supply line (DC)

Claims (7)

Multiple wires,
A flexible shielding member that collectively surrounds the plurality of electric wires;
A flexible cylinder surrounding the shield member;
A wire harness comprising: a bone member formed in a shape corresponding to a route through which the electric wire is routed and bound to the cylindrical body. Multiple wires,
A flexible shielding member that collectively surrounds the plurality of electric wires;
A flexible cylinder surrounding the shield member;
A wire harness comprising: a bone member formed in a shape corresponding to a route through which the electric wire is routed and surrounded by the cylindrical body. In the wire harness according to claim 1 or 2,
The wire harness is characterized in that the bone member is thinner than the diameter of the cylindrical body. In the wire harness as described in any one of Claims 1-3,
The said bone member has a hollow part, The wire harness characterized by the above-mentioned. The wire harness according to claim 4,
The wire harness is characterized in that the bone member is made of metal. In the wire harness as described in any one of Claims 1-5,
The said wire is a colored corrugated pipe | tube, The wire harness characterized by the above-mentioned. In the wire harness as described in any one of Claims 1-6,
The electric wire is connected between devices mounted on an automobile,
The said cylinder is a wire harness routed in the floor under the body of the said motor vehicle.

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