JP2016110811A - Wire Harness - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a wire harness achieving weight saving, hardly receiving a limit in a wiring route, and capable of suppressing a decrease in assembling property and processability of the wire harness.SOLUTION: A wire harness 1 includes: two junction boxes 10; two control boards CS for performing multiple communication; a first power source line 31a supplying electric power from a battery B to the junction box 10; a second power source line 31b for supplying electric power to various equipment E from the junction box 10; a signal line 32a performing signal transduction between the control boards CS and the various equipment E; and a trunk line 32b provided between the control boards CS, as an electric wire for performing multiple communication by the control boards CS. At least part of the first power source line 31a, the second power source line 31b, the signal line 32a and the trunk line 32b is formed of an aluminium-containing electric conductor.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a wire harness.

  In recent years, a wire harness in which the conductor of the electric wire is aluminum or an aluminum alloy has been proposed (see, for example, Patent Document 1). According to this wire harness, since the conductor is made of aluminum or an aluminum alloy, the weight can be reduced as compared with the case where copper is used for the conductor.

JP 2009-170177 A

  However, the conductivity of copper is 100% IACS, whereas the conductivity of aluminum is only 61% IACS. For this reason, like the invention of patent document 1, when changing a conductor from copper to aluminum or aluminum alloy, it is necessary to enlarge the cross-sectional area of a conductor, and the diameter of a wire harness will become large. And if the diameter of a wire harness becomes large, it will receive a restriction | limiting in the wiring route of a wire harness, or will cause the assembly | attachment property and workability of a wire harness to fall.

  The present invention has been made in order to solve such a conventional problem. The object of the present invention is to reduce the weight, to be difficult to be restricted by the routing route, and to assemble the wire harness. It is providing the wire harness which can suppress the fall of workability.

  The wire harness of the present invention is a wire harness that supplies electric power from a battery to various devices and transmits signals between the various devices, and includes two junction boxes that are provided separately on the left and right sides of the vehicle, Two control devices provided inside or outside the two junction boxes for performing multiplex communication, a first power line for supplying power from the battery to the two junction boxes, and the two junction boxes Provided between the two control devices, a second power supply line for supplying power to the various devices from, a signal line for transmitting signals between the two control devices and the various devices, A trunk line that is an electric wire to be multiplexed by two control devices, and the first power line, the second power line, the signal At least some of the lines and the main line, characterized in that it is constituted by a conductor including aluminum.

  According to the wire harness of the present invention, at least a part of the first power supply line, the second power supply line, the signal line, and the trunk line is made of a conductor containing aluminum, so that the weight can be reduced. Here, there is a concern about an increase in diameter by using a conductor containing aluminum for the wire harness, but it is usually possible to reduce the number of circuits and suppress an increase in diameter by performing multiplex communication on the trunk line where various electric wires are gathered. it can. Thereby, it is hard to receive the restriction | limiting of a routing route, and the assembly | attachment property and workability of a wire harness can be suppressed.

  In the wire harness of the present invention, at least a part of the electric wires constituting the power supply line group including the first power supply line and the second power supply line is made of a conductor containing aluminum, and the signal line and the trunk line It is preferable that at least a part of the electric wires constituting the signal line group made of is made of a conductor containing aluminum.

  According to this wire harness, at least a part of each of the power supply line group and the signal line group is configured by a conductor containing aluminum. Here, since the electric wire constituting the power supply line group has a single diameter larger than that of the electric wire constituting the signal line group, the diameter of the originally large electric wire is further increased when the electric wire group is constituted by a conductor containing aluminum. However, it becomes easy to be restricted by the routing route, but the number of circuits can be reduced and the increase in diameter can be suppressed by performing multiplex communication on the trunk line where various electric wires are gathered. Furthermore, since the electric wires constituting the signal line group inherently have more circuits than the electric wires constituting the power supply line group, when the conductors including aluminum are used, the electric wires having an increased diameter are bundled. Although the diameter becomes large and it becomes easy to be restricted by the routing route, the increase in the diameter can be suppressed by reducing the number of circuits by performing multiplex communication on the trunk line where various electric wires are gathered. Therefore, it is hard to receive the restriction | limiting of a routing route, and the assembly | attachment property and workability of a wire harness can be suppressed.

  In the wire harness of the present invention, at least a part of the electric wires constituting the power supply line group including the first power supply line and the second power supply line is made of a conductor containing aluminum, and the signal line and the trunk line It is preferable that the electric wire which comprises the signal wire group which consists of is comprised with the conductor which does not contain aluminum.

  According to this wire harness, at least a part of the electric wires constituting the power supply line group is constituted by a conductor containing aluminum. Here, since the electric wire constituting the power supply line group has a single diameter larger than that of the electric wire constituting the signal line group, the diameter of the originally large electric wire is further increased when the electric wire group is constituted by a conductor containing aluminum. It becomes easy to be restricted by the routing route, but it is difficult to be restricted by the routing route because it reduces the number of circuits and suppresses the increase in diameter by performing multiplex communication on the trunk line where various wires gather. And the assembly | attachment property and workability of a wire harness can be suppressed.

  Further, in the wire harness of the present invention, the electric wire constituting the power supply line group composed of the first power supply line and the second power supply line is composed of a conductor not containing aluminum, and the signal composed of the signal line and the trunk line. It is preferable that the electric wire which comprises a wire group is comprised by the conductor containing aluminum.

  According to this wire harness, at least a part of the electric wires constituting the signal line group is constituted by a conductor containing aluminum. Here, the electric wires constituting the signal line group inherently have more circuits than the electric wires constituting the power supply line group. Therefore, in the case of being constituted by a conductor containing aluminum, the electric wires having an increased diameter are bundled. Although the diameter becomes larger and it becomes easier to be restricted by the routing route, in order to reduce the number of circuits and suppress the increase in diameter by performing multiplex communication on the trunk line where various electric wires are gathered, It is difficult to receive the restriction, and it is possible to suppress a decrease in assembly property and workability of the wire harness.

  In the wire harness of the present invention, it is preferable that the two control devices are provided in an E connector provided outside the two junction boxes and having a waterproof function.

  According to this wire harness, two control devices are provided in an E connector having a waterproof function. Here, in general, an electric wire made of a conductor containing aluminum is usually subjected to anticorrosion treatment. However, since these electric wires are connected to an E connector having a waterproof function, the anticorrosion treatment can be omitted.

  ADVANTAGE OF THE INVENTION According to this invention, while aiming at weight reduction, it is hard to receive the restriction | limiting of a routing route, and the wire harness which can suppress the assembly | attachment property of a wire harness and workability can be provided.

It is a lineblock diagram showing the wire harness concerning the embodiment of the present invention. It is a graph which shows the number of circuits and the diameter of the wire harness which concerns on this embodiment, and the wire harness which concerns on a comparative example. It is a graph which shows the number of circuits and the weight of the wire harness which concerns on this embodiment, and the wire harness which concerns on a comparative example. It is a block diagram which shows the wire harness which concerns on 2nd Embodiment. It is a disassembled perspective view which shows an example of the left side E connector shown in FIG.

  Preferred embodiments of the present invention will be described below with reference to the drawings. However, the present invention is not limited to the following embodiments.

  Drawing 1 is a lineblock diagram showing the wire harness concerning the embodiment of the present invention. As shown in FIG. 1, the wire harness 1 according to this embodiment supplies power from the battery B to various devices E and transmits signals between the various devices E. (Referred to as JB) 10 and a plurality of types of electric wires 30.

  In this embodiment, the engine control unit (hereinafter referred to as ECU) E1 and the multiplex integrated control unit (hereinafter referred to as MICU) E2 are illustrated as the devices E. However, the devices E are provided in various ways. It has been.

  The two JBs 10 are protective boxes for connecting, branching, and relaying the electric wires, and are composed of a left side JB 11 and a right side JB 12 that are spaced apart on the left and right sides of the vehicle. In addition, a control board (control device) CS is provided in each of the two JBs 10. The control board CS has electronic elements such as an IC and a microprocessor, and can at least send and receive signals by multiplex communication.

  The plurality of types of electric wires 30 includes a power line group 31 and a signal line group 32. The power supply line group 31 includes first and second power supply lines 31a and 31b. The first power supply line 31 a is an electric wire that supplies power from the battery B to the two JBs 10. The second power supply line 31b is an electric wire that supplies power from the two JBs 10 to the various devices E. Each of the first and second power supply lines 31a and 31b may be composed of one circuit or a plurality of circuits.

  The signal line group 32 includes a signal line 32a and a trunk line 32b. The signal line 32a is an electric wire that transmits signals between the two control boards CS and the various devices E. The trunk line 32b is an electric wire provided between the two control boards CS and performing multiplex communication. Since the trunk line 32b performs multiplex communication, the number of wires (number of circuits) of the trunk line 32b is smaller than that of the signal line 32a. The trunk line 32b may be configured by one circuit or may be configured by a plurality of circuits.

  Furthermore, in the present embodiment, at least a part of the first power supply line 31a, the second power supply line 31b, the signal line 32a, and the trunk line 32b is made of a conductor containing aluminum. Thereby, weight reduction of the wire harness 1 is aimed at. In more detail, the wire harness 1 according to the present embodiment is reduced in weight by any one of the following three patterns.

  1stly, the wire harness 1 is comprised by the conductor in which at least one part of the electric wire which comprises the power wire group 31 contains aluminum, and at least one part of the electric wire which comprises the signal wire group 32 is comprised by the conductor containing aluminum. Has been. For example, several of the plurality of electric wires constituting the first power supply line 31a are constituted by a conductor containing aluminum, and several of the plurality of electric wires constituting the signal line 32a are constituted by a conductor containing aluminum. This is the case when configured. Moreover, it corresponds also when all of the multiple types of electric wires 30 are comprised with the conductor containing aluminum.

  Secondly, in the wire harness 1, at least a part of the electric wires constituting the power supply line group 31 is constituted by a conductor containing aluminum, and the electric wires constituting the signal line group 32 are constituted by a conductor not containing aluminum. For example, a case in which several of the plurality of electric wires constituting the first power supply line 31a are made of a conductor containing aluminum, and the conductors of the signal line 32a and the trunk line 32b are made of copper is applicable.

  Thirdly, in the wire harness 1, the electric wires constituting the power supply line group 31 are constituted by a conductor not containing aluminum, and at least a part of the electric wires constituting the signal line group 32 is constituted by a conductor containing aluminum. For example, the case where the first power supply line 31a and the second power supply line 31b are made of copper and several of the plurality of electric wires constituting the trunk line 32b are made of a conductor containing aluminum is applicable.

  In such a wire harness 1, since at least a part of the first power supply line 31a, the second power supply line 31b, the signal line 32a, and the trunk line 32b is made of a conductor containing aluminum, the wire harness as a whole Weight reduction can be achieved. Here, although there is a concern about an increase in diameter by using a conductor containing aluminum for the wire harness 1, the number of circuits is reduced by performing multiplex communication on the trunk line 32b in which various electric wires are gathered in a normal wire harness. An increase in diameter can be suppressed. Thereby, it is hard to receive the restriction | limiting of a routing route, and the assembly | attachment property and workability of a wire harness can be suppressed.

  Next, the number of circuits, the diameter, and the weight of the wire harness according to this embodiment will be described. FIG. 2 is a graph showing the number of circuits and the diameter of the wire harness according to this embodiment and the wire harness according to the comparative example, and FIG. 3 is a circuit of the wire harness according to this embodiment and the wire harness according to the comparative example. It is a graph which shows a number and a weight.

  As for the wire harness which concerns on a comparative example, the conductor of each electric wire is comprised with copper, and is not comprised with the conductor containing aluminum. Moreover, the wire harness which concerns on a comparative example is not performing the multiplex communication by the trunk line 32b. As shown in FIG. 2, the wire harness according to the comparative example has a circuit number of 337, for example, and a diameter of 40.1 mm. Moreover, as shown in FIG. 3, the weight of the wire harness which concerns on a comparative example is 2.94 kg.

  On the other hand, in the present embodiment, the case where a part of the plurality of types of electric wires 30 is made of aluminum, the remaining conductor is made of copper, and multiplex communication is performed by the trunk line 32b is taken as Example 1, and all the conductors of the plurality of types of electric wires 30 are made. Assuming that the case where aluminum is used and multiplex communication is performed on the trunk line 32b is Example 2, the wire harness according to Example 1 has, for example, 220 circuits and a diameter of 30.9 mm as shown in FIG. is there. Moreover, as shown in FIG. 3, the weight of the wire harness which concerns on Example 1 is 1.16 kg.

  Moreover, the wire harness which concerns on Example 2 has 220 circuits, for example, as shown in FIG. 2, and a diameter is 32.7 mm. Moreover, as shown in FIG. 3, the weight of the wire harness which concerns on Example 2 is 0.90 kg.

  Thus, according to the wire harness 1 according to the present embodiment, at least part of the first power supply line 31a, the second power supply line 31b, the signal line 32a, and the trunk line 32b is configured by a conductor containing aluminum. It is possible to reduce the weight. Here, there is a concern about an increase in diameter by using a conductor containing aluminum for the wire harness, but normally, the increase in the diameter is suppressed by reducing the number of circuits by performing multiplex communication in the trunk line 32b where various electric wires are gathered. Can do. Thereby, it is hard to receive the restriction | limiting of a routing route, and the assembly | attachment property and workability of a wire harness can be suppressed.

  Further, at least a part of each of the power supply line group 31 and the signal line group 32 is made of a conductor containing aluminum. Here, since the electric wire which comprises the power wire group 31 has one diameter larger than the electric wire which comprises the signal wire group 32, when comprised with the conductor containing aluminum, the diameter of the electric wire with a large diameter is originally originally. Although it becomes larger and it becomes easy to be restricted by the routing route, the increase in diameter can be suppressed by reducing the number of circuits by performing multiplex communication on the trunk line 32b where various electric wires are gathered. Further, since the number of circuits constituting the signal line group 32 is inherently larger than that of the power line group 31, when the conductors include aluminum, the wires having an increased diameter are bundled. However, the diameter is further increased and it is easy to be restricted by the routing route. However, the increase in the diameter can be suppressed by reducing the number of circuits by performing multiplex communication on the trunk line 32b where various electric wires are gathered. Therefore, it is hard to receive the restriction | limiting of a routing route, and the assembly | attachment property and workability of a wire harness can be suppressed.

  In addition, at least a part of the electric wires constituting the power supply line group 31 is made of a conductor containing aluminum. Here, since the electric wire which comprises the power wire group 31 has one diameter larger than the electric wire which comprises the signal wire group 32, when comprised with the conductor containing aluminum, the diameter of the electric wire with a large diameter is originally originally. Although it becomes larger and it becomes easy to be restricted by the routing route, in order to reduce the number of circuits and suppress the increase in diameter by performing multiplex communication on the trunk line 32b where various electric wires are gathered, the routing route is restricted. It is hard to receive, and the fall of the assembling property and workability of a wire harness can be suppressed.

  In addition, at least a part of the electric wires constituting the signal line group 32 is made of a conductor containing aluminum. Here, since the electric wires constituting the signal line group 32 inherently have a larger number of circuits than the electric wires constituting the power supply line group 31, the electric wires having an increased diameter are bundled when constituted by a conductor containing aluminum. As a result, the diameter becomes even larger and it becomes easier to be restricted by the routing route. However, in order to reduce the number of circuits and suppress the increase in diameter by performing multiplex communication on the trunk line 32b where various electric wires are gathered, It is difficult to receive the restriction of the cable path, and it is possible to suppress the assembling property and workability of the wire harness.

  Next, a second embodiment of the present invention will be described. The wire harness 2 according to the second embodiment is the same as that of the first embodiment, but the configuration is partially different. Only differences from the first embodiment will be described below.

  FIG. 4 is a configuration diagram showing the wire harness 2 according to the second embodiment. As shown in FIG. 4, the wire harness 2 according to the second embodiment further includes two E connectors 20.

  The two E connectors 20 are connectors on which a control board CS having electronic elements such as an IC and a microprocessor is mounted, and can exchange signals by multiplex communication. Such an E connector 20 is composed of a left E connector 21 and a right E connector 22 that are spaced apart from each other on the left and right sides of the vehicle. In the second embodiment, since the control board CS is mounted in the E connector 20 outside the JB 10, it is not mounted in the JB 10, and the JB 10 itself can be downsized.

  Further, the signal line 32 a and the trunk line 32 b are connected to the E connector 20. In the second embodiment, at least one of the signal line 32a and the trunk line 32b is made of a conductor containing aluminum.

  FIG. 5 is an exploded perspective view showing an example of the left E connector 21 shown in FIG. As shown in FIG. 5, the left E connector 21 includes a male connector 21a having a male terminal and a female connector 21b having a female terminal. A plurality of signal lines 32a are connected to the male connector 21a. Further, since the electronic element of the E connector 20 performs a multiplex communication by performing a control function, the number of the trunk lines 32b connected to the female connector 21b is smaller than the plurality of signal lines 32a, for example, three. It has become.

  Further, the left E connector 21 has a waterproof function. More specifically, the left E connector 21 includes a waterproof packing 21c and a plurality of rubber tubes 21d. The waterproof packing 21c is an elastic member such as rubber provided around the female connector 21b inserted into the male connector 21a. The plurality of rubber tubes 21d are cylindrical elastic members (rubber or the like) provided in the terminal accommodating chambers of the connectors 21a and 21b. Each signal line 32a and trunk line 32b are press-fitted inside the cylinder (illustration of the rubber tube 21d on the signal line 32a side is omitted in FIG. 5).

  In such a left E connector 21, when the female connector 21b is inserted into the male connector 21a, the waterproof packing 21c enters the inside of the opening O of the male connector 21a and comes into close contact with the inner wall portion 21a 'of the male connector 21a. Further, the plurality of rubber tubes 21d are in close contact with the inner wall of the terminal accommodating chamber while the signal wires 32a and the trunk wires 32b are press-fitted inside the cylinder. For this reason, the left E connector 21 has a waterproof structure in which water does not enter.

  Here, it is normal to perform an anticorrosion process about the electric wire which consists of a conductor containing aluminum generally. For this reason, the trouble of a corrosion prevention process is required. However, in the second embodiment, since these electric wires are connected to the E connector 20 having a waterproof function, the anticorrosion treatment can be made unnecessary.

  Thus, according to the wire harness 2 which concerns on 2nd Embodiment, it is hard to receive the restriction | limiting of a routing route similarly to 1st Embodiment, and suppresses the assembly | attachment property and workability of a wire harness. be able to.

  Furthermore, according to the second embodiment, two control boards CS are provided in the E connector 20 having a waterproof function. Here, although it is normal to perform anticorrosion processing about the electric wire which consists of a conductor containing aluminum generally, since these electric wires are connected to E connector 20 which has a waterproof function, anticorrosion processing can be made unnecessary.

  Further, since the E connector 20 is provided separately from the JB 10, the control board CS can be accommodated in the E connector 20, and the JB 10 can be downsized.

  As described above, the present invention has been described based on the embodiment, but the present invention is not limited to the above embodiment, and may be modified without departing from the gist of the present invention.

  For example, although the wire harness 1 which concerns on this embodiment has two JB10, even if it has three or more JB, if it contains the structure described by this invention, it is the wire harness of this invention Needless to say. Similarly, although it has the two E connectors 20, even if it has three or more E connectors, it is needless to say that the wire harness of the present invention is included as long as the configuration described in the present invention is included.

1, 2: Wire harness 10: Junction box 20: E connector 31: Power supply line group 31a: 1st power supply line 31b: 2nd power supply line 32: Signal line group 32a: Signal line 32b: Trunk line B: Battery E: Equipment

Claims (5)

A wire harness for supplying power from the battery to various devices and transmitting signals between the various devices,
Two junction boxes provided on the left and right sides of the vehicle,
Two control devices provided inside or outside the two junction boxes for performing multiplex communication;
A first power line for supplying power from the battery to the two junction boxes;
A second power line for supplying power to the various devices from the two junction boxes;
A signal line for transmitting signals between the two control devices and the various devices;
A trunk line that is provided between the two control devices and is an electric wire that performs multiplex communication by the two control devices;
At least a part of the first power supply line, the second power supply line, the signal line, and the trunk line is made of a conductor containing aluminum. At least a part of the electric wires constituting the power supply line group consisting of the first power supply line and the second power supply line is constituted by a conductor containing aluminum,
The wire harness according to claim 1, wherein at least a part of the electric wires constituting the signal line group including the signal line and the trunk line is configured by a conductor including aluminum. At least a part of the electric wires constituting the power supply line group consisting of the first power supply line and the second power supply line is constituted by a conductor containing aluminum,
The wire harness according to claim 1, wherein an electric wire constituting a signal line group including the signal line and the trunk line is formed of a conductor not containing aluminum. The electric wire constituting the power supply line group consisting of the first power supply line and the second power supply line is constituted by a conductor not containing aluminum,
The wire harness according to claim 1, wherein an electric wire constituting the signal line group including the signal line and the trunk line is formed of a conductor including aluminum. The wire harness according to any one of claims 2 and 4, wherein the two control devices are provided in an E connector provided outside the two junction boxes and having a waterproof function.

Images