JP2010013046A - Cable routing structure of wire harness - Google Patents

Abstract

The entire wire harness cost is reduced by making the specification having excellent bending performance only in a portion that needs to be bent freely.
A wiring structure of an automotive wire harness WH that is routed between a body 1 and an engine 2, the wire harness WH being connected to a body-side wire harness W1 and an engine-side wire harness W2. And a free bending portion wire harness W3 spanned between the body and the engine. One end of the electric wire of the wire harness on the body side is fixed to the body, and the connector 11 is provided at the other end near the engine. One end of the wire harness W2 on the engine side is fixed to the engine, and the connector 12 is provided at the other end near the body. The bend free part wire harness W3 is configured to be more flexible than the other wire harnesses, and connectors 21 and 22 are provided at both ends of the wires of the wire harness, and the connectors at both ends are connected to the connector of the body side wire harness and the engine. Each was connected to the connector of the side wire harness.
[Selection] Figure 1

Description

  The present invention relates to a wiring structure of a wire harness that is laid across a movable body and a fixed body that are relatively displaced, such as a vibrating engine and body, a door that opens and closes, a movable movable sheet and a body, and the like.

  When a wire harness is routed between a fixed body such as a body or an engine and a movable body, the wire harness portion spanned between the fixed body and the movable body is freely bent (for example, Patent Document 1). reference).

For example, as shown in FIG. 3, when the wire harness WH is routed between the body 1 and the engine 2, the wire harness W <b> 13 of about 1 m bend is included at the tip of the wire harness W <b> 12 on the engine 2 side. In general, after the engine 2 is assembled, the connector 41 at the distal end of the free bending portion wire harness W13 is connected to the connector 42 at the end of the wire harness W11 wired on the body 1 side. In this case, the wire harness is fixed to the body 1 or the engine 2 with fixing members 31 and 32 such as clips as necessary.
Japanese Patent Laid-Open No. 10-257631

  By the way, recently, with the increase in engine output and the increase in vibration and fluctuation of the engine, there has been an increasing demand to increase the flexibility of the wire harness that is bent between the body and the engine. Yes. As a countermeasure, it is conceivable that all engine-side wire harnesses including the bend free-part wire harness are made to have a flexible electric wire specification, but this will increase the cost of the engine-side wire harness. There's a problem. Conventionally, when the engine is transported from a factory that manufactures the engine to a factory that assembles the vehicle, the wire harness on the engine includes the bend free part wire harness, so the 1 m bend free part wire harness is transported. Occasionally, it may become a hindrance, and for example, a problem such as being sandwiched between other parts may occur.

  The present invention has been made in view of the above-described circumstances, and the purpose of the present invention is to reduce the overall wire harness cost by making the specifications excellent in bending performance only for the portions that need to be freely bent. Another object of the present invention is to provide a wiring structure for a wire harness that does not cause a problem such as pinching of the wire harness when the engine is assembled.

In order to achieve the above-described object, the wiring structure of the wire harness according to the present invention is characterized by the following (1).
(1) A second wire routed in a device in which a first connector is provided at one end of an electric wire of a first wire harness routed in a vehicle body and is displaced relative to the body. A second connector is provided at one end of the wire of the harness, and the wire of the third wire harness is connected to the first connector so that the first wire harness and the second wire harness are electrically connected. A third connector provided at one end of the third wire is electrically connected, and a fourth connector provided at the other end of the wire of the third wire harness is electrically connected to the second connector. And the electric wire of the third wire harness is more flexible than both the electric wire of the first wire harness and the electric wire of the second wire harness.

  According to the wiring structure of the wire harness configured as described above (1), the wire is routed between the vehicle body (fixed body) and the device (movable body) that is displaced relative to the body. A wire harness (first wire harness) on the fixed body side, a wire harness (second wire harness) on the movable body side, and a free bending part wire harness (third wire harness) that connects these wire harnesses to each other. In addition to connecting each electric wire via a connector, the electric wire of the bending free part wire harness is set to be more flexible than the electric wires of other wire harnesses, so the movable part The wire harness configuration can flexibly follow the movement of the wire harness, and the overall wire harness cost can be reduced. Moreover, since the bending free part wire harness can be attached later after the assembly of the engine, there is no fear of causing problems such as pinching of the wire harness when the engine is assembled.

  The above-mentioned specifications with excellent flexibility include, for example, items for evaluating the quality of electric wires such as curing durability with time, curing durability with respect to temperature, repeated durability that can withstand repeated bending, and maximum bending angle. It is excellent in. In the routing structure of the present invention, by using an electric wire excellent in bendability, the bendable portion of the wire harness is made more flexible than other wire harnesses, but it is integrated with an electric wire such as a coating covering the electric wire. The flexibility of the bending free part wire harness may be made superior to that of other wire harnesses by making the flexibility of the members formed to be superior to those of other wire harnesses.

  According to the present invention, only the portion that needs to be freely bent is made to have a specification excellent in bending performance, whereby the entire wire harness cost can be reduced. Further, since the bend free part wire harness is separated from the wire harness on the movable part side, it is possible to eliminate the possibility of problems such as pinching of the bend free part wire harness during assembly of the engine.

  The present invention has been briefly described above. Furthermore, the details of the present invention will be further clarified by reading through the best mode for carrying out the invention described below with reference to the accompanying drawings.

  DESCRIPTION OF EXEMPLARY EMBODIMENTS Hereinafter, preferred embodiments of the invention will be described in detail with reference to the drawings.

  FIG. 1 is a diagram showing a wire harness routing structure according to a first embodiment of the present invention, in which a wire harness WH is routed between a body (vehicle body) 1 as a fixed body and an engine 2 as a movable body. ing.

  In this wiring structure, the entire wire harness WH is bridged between the body 1 side (fixed body side) wire harness W1, the engine 2 side (movable body side) wire harness W2, and the body 1 and the engine 2. The wire harness W3 is separated into three parts with a free bending portion wire harness W3, and one end of the electric wire of the wire harness W1 on the body 1 side is fixed to the body 1, and the position of the electric wire of the wire harness W1 on the body 1 side is close to the engine 2 A connector 11 is provided at the other end of the wire, one end of the wire of the wire harness W2 on the engine 2 side is fixed to the engine 2, and a connector 12 is provided at the other end of the wire wire of the engine side wire harness W2 close to the body 1. ing.

  Then, the electric wire of the bending free part wire harness W3 is configured to be more flexible than the electric wire of the wire harness W1 on the body 1 side and the electric wire of the wire harness W2 on the engine 2 side, and the electric wire of the bending free part wire harness W3. Connectors 21 and 22 are provided at both ends of the connector, and the connectors 21 and 22 at both ends are connected to the connector 11 provided on the wire of the wire harness W1 on the body 1 side and the connector 12 provided on the wire of the wire harness W2 on the engine 2 side. Are connected to each other to connect the three wire harnesses W1, W2, and W3 into one. In this case, both ends of the bending free portion wire harness W3 are fixed to the body 1 and the engine 2 by fixing members 31 and 32 such as clips so that an excessive load is not applied to the connectors 11, 21, 12, and 22. .

  The above-mentioned specifications with excellent bendability are, for example, items for evaluating the quality of electric wires such as curing durability over time, curing durability with respect to temperature, repeated durability that can withstand repeated bending, and maximum bending angle. It means being excellent. In the routing structure of the present invention, by using an electric wire excellent in bendability, the bendable portion of the wire harness is made more flexible than other wire harnesses, but it is integrated with an electric wire such as a coating covering the electric wire. The flexibility of the bending free part wire harness may be made superior to that of other wire harnesses by making the flexibility of the members formed to be superior to those of other wire harnesses.

  Many factors that cause breakage of an electric wire at a portion where the wire harness is free to be bent are that a crack is generated in the electric wire coating by exceeding a critical stress at a low temperature. When a crack occurs in the coating, the electric wire suddenly bends at that portion, a large stress is applied to the internal conductor, work hardening progresses, and finally the wire breaks. Therefore, the bendability of the wire harness can be improved by using an electric wire using a coating material having excellent low temperature properties. Further, the outer periphery of the wire harness is usually covered with an exterior body such as a corrugated tube, but the bending performance can be improved by increasing the gap between the exterior body and the inner wire bundle.

  According to the above wiring structure, the wire harness WH for an automobile that is routed between the body 1 and the engine 2 is divided into the wire of the wire harness W1 on the body 1 side and the wire harness W2 of the engine 2 side. Are separated into three parts of the wire of the free bending part wire harness W3 connecting the wire harnesses W1 and W2, and connected by connectors 11, 12, 21, 22 respectively, and the free bending part wire harness W3 Since the electric wire is set to a specification that is more flexible than the electric wires of the other wire harnesses W1 and W2, a wire harness configuration that can flexibly follow the vibration of the engine 2 can be obtained, and the overall wire harness cost can be reduced. Can be lowered. Moreover, since the bending free part wire harness W3 can be attached later after the assembly of the engine 2, there is no fear of causing problems such as pinching of the wire harness W3 when the engine 2 is assembled.

  FIG. 2 is a diagram showing a wire harness routing structure according to a second embodiment of the present invention, in which the wire harness WH is routed between a body (vehicle body) 101 as a fixed body and a back door 102 as a movable body. is doing.

  Also in this case, the entire wire harness WH is bridged between the body 1 side (fixed body side) wire harness W1, the back door 102 side (movable body side) wire harness W2, and the body 101 and the back door 102. It is separated into three parts with the bending free part wire harness W3. In addition, one end of the electric wire of the wire harness W1 on the body 101 side is fixed to the body 101, and the connector 11 is provided on the other end of the electric wire of the wire harness W1 on the body 101 side near the back door 102. One end of the wire of the wire harness W2 is fixed to the back door 102, and the connector 12 is provided at the other end of the wire harness W2 on the back door 102 side near the body 101 of the wire.

  And the bending free part wire harness W3 is configured to have a specification that is more flexible than the electric wire of the wire harness W1 on the body 101 side and the electric wire of the wire harness W2 on the back door 102 side, and is attached to both ends of the bending free part wire harness W3. The connectors 21 and 22 are provided, and the connectors 21 and 22 at both ends are respectively connected to the connector 11 provided on the electric wire of the wire harness W1 on the body 101 side and the connector 12 provided on the electric wire of the wire harness W2 on the back door 102 side. By connecting, three wire harnesses W1, W2, and W3 are connected to one. Also in this case, the vicinity of both ends of the free bending portion wire harness W3 is fixed to the body 101 and the back door 102 by the fixing members 31 and 32 such as clips so that an unnecessary burden is not applied to the connectors 11, 21, 12, and 22 portions. is doing.

  Also in the case of this wiring structure, the automobile wire harness WH routed between the body 101 and the back door 102 is divided into a wire harness W1 on the body 101 side, a wire harness W2 on the back door 102 side, and The wire harnesses W1 and W2 are separated into three parts with a bend free part wire harness W3 and connected with connectors 11, 12, 21, and 22, respectively, and the bend free part wire harness W3 is connected to another wire harness W1. Since the specification is set to be more flexible than W2, it is possible to provide a wire harness configuration that can flexibly follow the opening / closing operation of the back door 102, and to reduce the overall wire harness cost. Moreover, since the bending free part wire harness W3 can be attached later after the back door 102 is assembled, there is no fear of causing problems such as pinching of the wire harness W3 when the back door 102 is assembled.

  In addition, this invention is not limited to embodiment mentioned above, A deformation | transformation, improvement, etc. are possible suitably. In addition, the material, shape, dimensions, number, arrangement location, and the like of each component in the above-described embodiment are arbitrary and are not limited as long as the present invention can be achieved.

  For example, in the above-described embodiment, the case where the wire harness WH is routed between the bodies 1 and 101 as the fixed portions and the engine 2 and the back door 102 as the movable portions is shown. The present invention can also be applied when a wire harness is bridged between the movable part and the movable part.

It is a perspective view which shows schematic structure of 1st Embodiment of this invention. It is a perspective view which shows schematic structure of 1st Embodiment of this invention. It is a perspective view which shows the wiring structure of the conventional wire harness.

Explanation of symbols

WH Wire harness W1 Fixed part side wire harness W2 Movable part side wire harness W3 Bending free part wire harness 1,101 Body (fixed part)
2 Engine (moving part)
11, 12, 21, 22 Connector

Claims (1)

  An electric wire of a second wire harness arranged in a device in which a first connector is provided at one end of the electric wire of the first wire harness arranged in the body of the vehicle and is displaced relative to the body. A second connector is provided at one end of the first wire harness, and the first wire harness and the second wire harness are electrically connected to one end of the third wire harness in the first connector. A third connector provided on the second wire connector is electrically connected and a fourth connector provided on the other end of the electric wire of the third wire harness is electrically connected to the second connector; And the wiring structure of the wire harness characterized by the electric wire of the said 3rd wire harness having the flexibility superior to both the electric wire of the said 1st wire harness, and the electric wire of the said 2nd wire harness.

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