JP2013093145A - Wire harness - Google Patents

Abstract

PROBLEM TO BE SOLVED: To enhance routing performance of a wire harness 26 without impairing heat dissipation.SOLUTION: A wire harness 26 includes: a structure in a portion excluding a twisted bent portion bent with flat faces being twisted, in which power cables 30a, 30b, and 30c are arranged along the flat faces; and a structure in the twisted bent portion, in which, as shown in the figure, the power cables 30a and 30c are arranged along the flat faces and the power cable 30b is arranged so that the flat face of the cable 30b faces the flat faces of the cables 30a and 30c within a width W of the flat faces of the cables 30a and 30c. Accordingly, a height H of twist in the twisted bent portion can be suppressed to reduce a space necessary for routing of the wire harness 26 and to ensure heat dissipation in the portion excluding the twisted bent portion and prevent large reduction in heat dissipation in the twisted bent portion.

Description

  The present invention relates to a wire harness having a structure in which three power cables connected to each phase of a three-phase motor and having a flat cross section are arranged along a flat surface.

  Conventionally, this type of wire harness is used in vehicles equipped with a three-phase motor as a driving source in the engine room, and bundles three flat power cables for supplying power to the three-phase motor. The thing is proposed (for example, refer patent document 1). In this wire harness, by arranging three power cables along a flat surface so as not to overlap each other, the surface area can be increased to improve heat dissipation.

JP 2010-287537 A

  In a vehicle or the like in which such a wire harness is used, the wiring space for the wire harness may be limited by mounting a plurality of devices in addition to the motor. Here, if it is set as the structure which has arrange | positioned three power cables in the arrangement | sequence as mentioned above, the width | variety of what can suppress the height of a wire harness will become wide. For this reason, in a location where the wire harness is bent while being twisted on a flat surface, a large space is required as a wide distribution cable space, which may make wiring difficult.

  The main purpose of the wire harness of the present invention is to improve the wiring property without impairing the heat dissipation.

  The wire harness of the present invention employs the following means in order to achieve the main object described above.

The wire harness of the present invention is
In a wire harness with a structure in which three power cables connected to each phase of a three-phase motor and having a flat cross section are arranged along a flat surface,
In a place where the flat surface is twisted, two of the three power cables are arranged side by side along the flat surface, and the other one is a flat surface of the two power cables. The gist is to arrange the two power cables and flat surfaces facing each other so as to fit within the width.

  In the wire harness of the present invention, at a portion where the flat surface is twisted with twisting, two of the three power cables are arranged side by side along the flat surface, and the remaining one is two electric power. Two power cables and the flat surfaces are placed facing each other so that they fit within the width of the flat surface of the cable. Thereby, the width | variety of a wire harness can be partially made small in the location bent with the twist of a flat surface. Here, in such a portion, the flat surface is inclined by twisting, and therefore, the width direction of the flat surface is bent so as to be the height direction. For this reason, by partially reducing the width, the height of twist can be suppressed, and the space required for the wiring harness can be reduced. On the other hand, by arranging the three power cables side by side along a flat surface except for a portion that is bent with twisting, the surface area can be increased to ensure heat dissipation. Also, even in locations where bending is caused by twisting, the two power cables are arranged side by side along a flat surface to prevent the surface area from becoming significantly small, thus preventing a significant reduction in heat dissipation. can do. As a result, the wiring property can be improved without impairing the heat dissipation of the wire harness.

  In such a wire harness of the present invention, two of the three power cables arranged at both ends are arranged side by side along a flat surface, and the remaining one arranged at the center is the two power cables. It is also possible to arrange the flat surfaces facing each other.

It is explanatory drawing which shows the external appearance of the hybrid vehicle 20 in which the wire harness 26 as one Example of this invention is used. It is a perspective view which shows a mode that the wire harness 26 is routed. It is explanatory drawing which shows the outline of the structure of the wire harness 26. FIG. 3 is an explanatory diagram showing an outline of a partial structure of a wire harness 26. FIG. It is explanatory drawing which shows the mode of the twist bending location of the wire harness 26 of an Example. It is explanatory drawing which shows the mode of the twist bending location of the wire harness 26B of a comparative example.

  Next, the form for implementing this invention is demonstrated using an Example.

  FIG. 1 is an explanatory view showing the appearance of a hybrid vehicle 20 in which a wire harness 26 as an embodiment of the present invention is used. As shown in the figure, an engine room 21 at the front part of the hybrid vehicle 20 has an engine 22 capable of outputting driving power and a generator (not shown) configured as a three-phase AC motor and driven as a generator or an electric motor. And a motor unit 24 having a motor (not shown) that is configured as a three-phase AC motor and outputs driving power, and an inverter unit 28 having two inverters (not shown) that drive motors and generators in the motor unit 24. The motor unit 24 and the inverter unit 28 are electrically connected by two wire harnesses 26 routed in the engine room 21. Further, a battery 40 that exchanges electric power with the motor unit 24 via the inverter unit 28 is mounted behind the rear seat (not shown) at the rear of the vehicle, and the inverter unit 28 and the battery 40 are disposed at the lower part of the vehicle body. It is electrically connected by a wire harness 42 to be routed.

  FIG. 2 shows a perspective view of how the wire harness 26 is routed. As shown in the figure, two wire harnesses 26 each have a terminal 26 a at one end connected to a three-phase terminal of an inverter (not shown) of the inverter unit 28 and a terminal 26 b at the other end (not shown) of a motor unit 24. Or connected to the three-phase terminal of the generator. Further, the wire harness 26 is fixed to a fixture (not shown) attached to the engine 22, the motor unit 24, and the inverter unit 28 in the routing route.

  Here, the outline of the structure of the wire harness 26 is shown in FIG. 3, and the outline of the partial structure of the wire harness 26 is shown in FIG. As shown in FIG. 3, the wire harness 26 includes a flat type power cable 30 (three power cables 30a, 30b, 30c) having a flat cross section in which a conductor (not shown) is covered with an insulator, and thermal conductivity. A braided wire 32 that covers the power cable 30 with a metal wire such as a copper wire and electromagnetically shields it, and a protective member that covers the braided wire 32 over substantially the entire length of the power cable 30 to prevent damage and wear. 34 (for example, a corrugated tube or a mesh-like sheet material). As shown in FIG. 3, the wire harness 26 has a structure in which the power cables 30a, 30b, 30c are arranged side by side along a flat surface so as not to overlap each other. Moreover, the wire harness 26 has a structure shown in FIG. 4 partially in the routing route. That is, the power cables 30a and 30c at both ends of the power cable 30 are arranged side by side along a flat surface, and the middle power cable 30b is placed within the width of the flat surface of the power cables 30a and 30c. It has a structure in which flat surfaces are placed facing each other. 3, illustration of a part of the braided wire 32 and the protective member 34 is omitted to show the structure of the wire harness 26, and illustration of a part of the protective member 34 is omitted in FIG. Was omitted.

  With the structure of FIG. 4, the height (thickness) of the wire harness 26 is higher than that of the structure of FIG. 3, but the width can be suppressed to about 2/3. In this embodiment, the wire harness 26 (power cable 30) is bent in the routing path with a flat surface twist (for example, a portion surrounded by an alternate long and short dash line in FIG. 4), the structure shown in FIG. 4 is used partially, and the structure shown in FIG. The structure shown in FIG. 3 can be changed from the structure shown in FIG. 4 by bringing the power cables 30a and 30c closer to each other so that the middle power cable 30b is shifted upward and the power cable 30b goes under the power cable 30b. Further, the structure shown in FIG. 4 can be changed by shifting the power cables 30a and 30c downward while shifting the power cables 30a and 30c left and right so that the power cables 30b can be accommodated therebetween. In addition, it is good also as what changes partially to the structure of FIG. 4 in a twist bending location, while routing the wire harness 26, from the routing route of the wire harness 26 in the engine room 21, the space which can be routed, etc. It is good also as what is grasped | ascertained the position (distance from the terminal 26a or the terminal 26b) of the twist bending location, and after having previously made it partially the structure of FIG. 4 according to the grasped position.

  FIG. 5 shows a state of the twisted bending portion of the wire harness 26 of the embodiment having such a structure, and FIG. 6 shows a state of the twisted bent portion of the wire harness 26B of the comparative example. In addition, as a comparative example, the case where the structure of FIG. Here, since the flat surface is inclined at the twisted bending portion, the flat surface is bent so that the width direction of the flat surface becomes the height direction. For this reason, the height H of the torsion at the twisted bending portion is less affected by the height of the wire harness 26 and becomes higher as the width W of the wire harness 26 is wider. For this reason, in the embodiment of FIG. 5, the width W of the wire harness 26 is suppressed as the structure of FIG. 4 at the torsional bending portion, so that the torsion height H can be reduced as compared with the comparative example of FIG. 6. . Specifically, since the structure of FIG. 4 has a width W that is about 2/3 of the structure of the comparative example, the torsional height H can be suppressed to about 2/3 of the comparative example. Thereby, in a twist bending location, the space required for the wiring harness 26 can be reduced. On the other hand, since the wire harness 26 has a structure in which the structure of FIG. 3, that is, the three power cables 30 a, 30 b, and 30 c are arranged along a flat surface so as not to overlap each other except for a twisted bending portion, the surface area is reduced. It can be increased to ensure heat dissipation. In addition, even at the twisted bending portion, the power cables 30a and 30c are arranged side by side along a flat surface, so that the surface area is prevented from becoming extremely small, so that the heat dissipation can be prevented from being greatly reduced. . From these things, routing property can be improved without impairing heat dissipation. For this reason, the wire harness 26 has the structure shown in FIG. 3 except for the twisted bending portion, and the structure shown in FIG. 4 at the twisted bending portion.

  According to the wire harness 26 of the embodiment described above, the power cables 30a, 30b, and 30c are arranged side by side along the flat surface except for the twisted bending portion that is bent with the twist of the flat surface. The power cables 30a and 30c and the flat surfaces are arranged so that the power cables 30a and 30c are arranged side by side along the flat surface and the power cable 30b fits within the width of the flat surface of the power cables 30a and 30c. Since the structure is arranged facing each other, the height H of the torsional bending part can be suppressed to reduce the space required for the wiring, and heat dissipation is ensured and the torsional bending part is excluded except for the torsion bending part. It is possible to prevent the heat dissipation from being greatly reduced. As a result, the routing property can be improved without impairing the heat dissipation of the wire harness 26.

  In the wire harness 26 of the embodiment, the middle power cable 30b in FIG. 3 is overlapped with the power cables 30a and 30c, but the present invention is not limited to this, and the left end power cable 30a in FIG. 3 is connected to the power cables 30b and 30c. The power cable 30c at the right end in FIG. 3 may be overlapped with the power cables 30a and 30b.

  In the wire harness 26 of the embodiment, the protection member 34 is covered over substantially the entire length of the power cable 30, but is not limited to this, and only covers portions where damage and wear are particularly problematic. And so on.

  The wire harness 26 of the embodiment is used for the hybrid vehicle 20 including two motors (motor and generator) and the engine, but is not limited thereto, and may be used for a hybrid vehicle including one motor. It is good also as what is used for the electric vehicle which is not equipped with an engine. Moreover, it is not restricted to what is used for such a hybrid vehicle and an electric vehicle, It is good also as what is used for vehicles, such as a train other than a motor vehicle, and it is used for the drive device incorporated in the moving body other than a vehicle, the installation which does not move It is good also as what is made.

  The correspondence between the main elements of the embodiment and the main elements of the invention described in the column of means for solving the problems will be described. In the embodiment, the motor unit 24 corresponds to a “three-phase motor”, the inverter unit 28 corresponds to an “inverter”, the power cable 30 (30a, 30b, 30c) corresponds to a “power cable”, and the wire harness 26 Corresponds to a “wire harness”.

  The correspondence between the main elements of the embodiment and the main elements of the invention described in the column of means for solving the problem is the same as that of the embodiment described in the column of means for solving the problem. Therefore, the elements of the invention described in the column of means for solving the problems are not limited. That is, the interpretation of the invention described in the column of means for solving the problems should be made based on the description of the column, and the examples are those of the invention described in the column of means for solving the problems. It is only a specific example.

  As mentioned above, although the form for implementing this invention was demonstrated using the Example, this invention is not limited at all to such an Example, In the range which does not deviate from the summary of this invention, it is with various forms. Of course, it can be implemented.

  The present invention is applicable to the automobile manufacturing industry.

  20 Hybrid vehicle, 21 Engine room, 22 Engine, 24 Motor unit, 26, 26B Wire harness, 26a, 26b Terminal, 28 Inverter unit, 30, 30a, 30b, 30c Power cable, 32 Braided wire, 34 Protective member, 40 Battery 42 Wire harness.

Claims (1)

In a wire harness with a structure in which three power cables connected to each phase of a three-phase motor and having a flat cross section are arranged along a flat surface,
In a place where the flat surface is twisted, two of the three power cables are arranged side by side along the flat surface, and the other one is a flat surface of the two power cables. A wire harness characterized by arranging the two power cables and flat surfaces facing each other so as to fit within the width.

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