JP2011173456A - Wiring structure of wire harness - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To electrically connect a plurality of shield pipes and a braided shield tube by small working man-hours and a slim connection structure. <P>SOLUTION: In the electric connection of each shield pipe and the braided shield tube, shield terminals projectively provided with terminal pieces at a tip of a cylinder are caulked and fixed by externally fitting the cylinder to each of the shield pipes and the terminal pieces are projected, each terminal piece of each shield terminal is locked at intervals at an outer periphery of a backup ring formed of a conductive metal material, the backup ring mounted with the shield terminals at the outer periphery is covered with a tip of the braided shield tube, a caulking ring is externally fitted to an outer periphery of the braided shield tube, and the caulking ring is caulked and fixed by holding the terminal piece of each shield terminal and the tip of the braided shield tube between the backup ring and the caulking ring. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to a wiring structure of a wire harness, and more particularly, in a wiring harness routed to a hybrid vehicle or an electric vehicle, a plurality of shield pipes for inserting a plurality of electric wires for each electric wire, and drawn from the shield pipe One shield braided tube through which the electric wires are focused and inserted is electrically connected.

  Conventionally, as a wiring structure of a power cable routed in a hybrid vehicle or an electric vehicle, Japanese Patent Application Laid-Open No. 2004-224156 (Patent Document 1) has proposed a structure shown in FIGS. The structure is such that three power cables (high voltage cables) 102U, 102V, and 102W connected to the inverter 100 mounted on the rear side are passed through metal shield pipes (protection pipes) 110 and forward to the bottom of the floor. The wiring is drawn into the engine room on the front side, and connected to the motor 101 mounted in the engine room. In the engine room, the three power cables 102U, 102V, 102W are collectively passed through a single shield tube (protective tube) 120 having flexibility.

  As described above, by passing the power cables 102U, 102V, and 102W through the rigid shield pipe 110 in the wiring area below the floor, and through the single shield tube 120 having flexibility in the wiring area in the engine room, The power cables 102U, 102V, and 102W can be wired below the floor so that the space above the floor can be used effectively.

JP 2004-224156 A

  In order to maintain a high shielding function in the structure, it is important to reliably electrically connect the plurality of shield pipes 110 to the shield tube 120. However, when a shield braided tube in which metal wires are knitted in a mesh shape is used as the shield tube 120, as shown in FIG. 4, the shield tube 120 is put on the tip of each shield pipe 110 and fixed using a caulking ring 130. There is a need to. When the shield tube 120 is connected to each of the plurality of shield pipes 110 using the caulking ring 130 as described above, the diameter of the entire connection portion becomes large, which makes it difficult to route to the vehicle, and further increases the weight of the wire harness. There is.

  According to the present invention, a plurality of shield pipes through which a plurality of electric wires are inserted for each electric wire and a single shield braided tube through which the wires drawn from the shield pipe are converged and inserted are electrically connected with a small number of work steps and a slim connection structure. The challenge is to be able to connect.

In order to solve the above problems, the present invention is a wiring structure of a wire harness that is wired to a hybrid vehicle or an electric vehicle,
A plurality of electric wires are passed through a shield pipe made of a metal pipe for each electric wire, and a first region in which the plurality of shield pipes are arranged close to each other in parallel,
A plurality of electric wires drawn out from the shield pipe, a second region that is inserted into one shield braided tube formed by knitting metal wires in a mesh shape, and
The electrical connection between each shield pipe in the first region and the shield braided tube in the second region is achieved by adding a shield terminal with a terminal piece projecting from the tip of the cylinder part by externally fitting the cylinder part to each shield pipe. Tighten and fix the terminal piece,
The terminal piece of each shield terminal is connected to the outer periphery of a backup ring made of an annular conductive metal material with a gap therebetween,
Put the tip of the shield braided tube over the backup ring with a shield terminal attached to the outer periphery,
A caulking ring is externally fitted to the outer periphery of the shield braided tube, and the caulking ring is fixed by crimping the terminal piece of the shield terminal and the tip of the shield braided tube between the backup ring and the caulking ring. A wiring harness wiring structure is provided.

As described above, the cylindrical portion of the shield terminal is externally fitted and crimped to each shield pipe in the first region, and the terminal piece projecting from the cylindrical portion of the shield terminal is spaced apart from the outer periphery of the backup ring. By simply stopping, each shield pipe to which the shield terminal is fixed and the backup ring can be easily electrically connected.
Further, a shield braided tube in a second region is covered with a backup ring on which the terminal piece of the shield terminal is locked, and a caulking ring is externally fitted on the outer periphery thereof, and the terminal piece is interposed between the backup ring and the caulking ring. The shield braided tube can be brought into close contact with the backup ring with a uniform caulking force for electrical connection by simply clamping and fixing the tip of the shield braided tube. Moreover, the electrical contact between the terminal piece of each shield terminal and the backup ring is enhanced, and a reliable electrical connection can be achieved.
Therefore, according to the said structure, the electrical connection with the several shield pipe of a 1st area | region and one shield braided tube of a 2nd area | region can be easily performed with a simple operation process via the said backup ring. Further, in the present invention, the terminal piece of the shield terminal and the shield are not connected between the back-up ring and the caulking ring, instead of directly covering the tip part of each shield pipe with the tip part of the shield braided tube. Since it has a slim connection structure in which the tip portion of the braided tube is sandwiched, it can be easily routed to the vehicle and the increase in the weight of the wire harness can be suppressed.

In order to reliably provide a contact point with the backup ring, it is preferable to protrude a convex bead on the contact surface side with the backup ring on the terminal piece projected at the tip of the cylindrical portion of the shield terminal. . It is also preferable to secure a contact point with the backup ring by forming a radius of curvature R of the terminal piece smaller than a curvature radius R of the backup ring. Thereby, the reliable electrical connection of the said terminal piece and a backup ring is attained.
Further, it is preferable that a locking recess for stably locking the terminal piece of the shield terminal is provided on the outer peripheral surface of the backup ring with a gap.

The backup ring is preferably formed of, for example, an aluminum-based metal, a copper-based metal, or iron (plated product), and the shield terminal is preferably formed of a copper-based metal. The caulking ring is preferably formed of an aluminum-based metal, stainless steel, or iron.
Further, the shield braided tube is preferably made of, for example, a copper-based metal wire, and the shield pipe is preferably formed of an aluminum-based metal.

  Preferably, the first area is a wiring area below the vehicle floor, and the second area is a wiring area in an engine room.

  Since the lower part of the vehicle floor is an area that can be wired in a substantially straight line, a plurality of electric wires connected to a rear-side device such as a battery or an inverter are inserted into the shield pipe for each electric wire as a first area for parallel piping. Thus, the vehicle space can be used effectively. On the other hand, since there is a portion that needs to be bent and wired in the engine room, a plurality of electric wires drawn out from the shield pipe are converged to be a second region to be inserted into a flexible shield braided tube. It is preferable. A plurality of electric wires inserted into the shield braided tube can be connected to devices such as an inverter and a motor in the engine room.

As described above, in the present invention, the cylindrical portion of the shield terminal is externally fitted and fixed to each shield pipe in the first region, and the terminal piece protruding from the cylindrical portion of the shield terminal is spaced from the outer periphery of the backup ring. Open and lock. With this configuration, each shield pipe to which the shield terminal is fixed can be easily electrically connected to the backup ring.
Further, a shield braided tube in a second region is covered with a backup ring on which the terminal piece of the shield terminal is locked, and a caulking ring is externally fitted on the outer periphery thereof, and the terminal piece is interposed between the backup ring and the caulking ring. And are clamped and fixed across the tip of the shield braided tube. With this configuration, the shield braided tube can be electrically connected to the backup ring with a uniform caulking force, and the electrical connection between the terminal pieces of the shield terminals and the backup ring can be improved and reliable electrical connection can be achieved. .
That is, according to the above configuration, electrical connection between the plurality of shield pipes in the first region and one shield braided tube in the second region can be easily performed through a simple work process via the backup ring. . In addition, since it has a slim connection structure in which the terminal piece of the shield terminal and the tip of the shield braided tube are sandwiched between the back-up ring and the caulking ring, wiring to the vehicle is easy and the wire harness Weight increase can also be suppressed.

The wiring structure of the wire harness in this embodiment is shown, (A) is a schematic explanatory drawing of the state wired to the motor vehicle, (B) is a schematic plan view. The connection part of a shield pipe and a shield braided tube is shown, (A) is a schematic exploded perspective view, (B) is a schematic perspective view after a connection, (C) is an AA sectional view. It is a figure which shows a prior art example. It is a figure which shows a prior art example.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.
1 and 2 show an embodiment of the present invention. In the present embodiment, in the hybrid vehicle, as shown in FIG. 1, a wire harness is routed to connect the battery 1 and inverter mounted on the rear side to the inverter 4 and motor mounted in the engine room 3. . The three electric wires 10 (10A, 10B, 10C) constituting the wire harness are connected to the battery 1 and the inverter on the rear side, wired below the floor 2, and drawn upward on the floor 2 on the front side to the engine room 3. It is connected to the inverter 4 and the motor inside.

  The wiring area of the wire harness is wired from the rear side to the lower side of the floor 2 and drawn into the engine room 3 on the front side, and is wired in the engine room 3 continuously to the first area R1. It consists of 2nd area | region R2. In the first region R1, as shown in FIG. 1B, the three electric wires 10 (10A, 10B, 10C) are passed through the shield pipe 11 (11A, 11B, 11C) made of an aluminum-based metal pipe for each electric wire. These shield pipes 11 (11A, 11B, 11C) are arranged close to each other in parallel. On the other hand, in the second region R2, the three electric wires 10 (10A, 10B, and 10C) drawn from the three shield pipes 11 (11A, 11B, and 11C) are converged, and the copper-based metal wire is meshed. It is inserted through one shield braided tube 12 formed by knitting.

  It is necessary to electrically connect the three shield pipes 11 (11A, 11B, 11C) and one shield braided tube 12 at the boundary position between the first region R1 and the second region R2. Therefore, in this embodiment, first, as shown in FIG. 2, shield terminals 13 (13A, 13B, 13C) made of copper-based metal are fixed to the three shield pipes 11 (11A, 11B, 11C). Specifically, the shield terminal 13 (13A, 13B, 13C) includes a cylindrical portion 14 (14A, 14B, 14C) and a terminal strip 15 (15A, 15B, 15C), and the terminal portions of the three shield pipes 11 (11A, 11B, 11C) are externally fitted to the tip portions of the three shield pipes 11 (11A, 11B, 11C), and fixed by crimping. The piece 15 (15A, 15B, 15C) is protruded to the second region R2 side.

  Subsequently, the three electric wires 10 (10A, 10B, 10C) drawn from the tip of the shield pipe 11 (11A, 11B, 11C) are inserted into the annular backup ring 17, and the backup ring 17 is connected to the terminal. The terminal 15 (15A, 15B, 15C) is moved to the side of the piece 15 (15A, 15B, 15C) and is locked to the outer periphery of the backup ring 17 with a gap. The backup ring 17 is formed of aluminum-based metal, copper-based metal, or iron (plated product), and the rectangular terminal piece 15 (15A, 15B, 15C) is stably locked to the outer peripheral surface of the backup ring 17. Rectangular locking recesses 18 (18A, 18B, 18C) are provided at intervals. Further, a convex bead 16 (16A) is provided at the center of the terminal piece 15 (15A, 15B, 15C) for reliably providing a contact point with the locking recess 18 (18A, 18B, 18C) of the backup ring 17. , 16B, 16C) protrudes toward the contact surface with the locking recess 18 (18A, 18B, 18C).

Finally, the backup ring 17 that locks the terminal piece 15 (15A, 15B, 15C) is covered with the tip of the shield braided tube 12 in the second region R2, and the caulking ring 19 is externally fitted to the outer periphery of the backup ring 17. The crimping protrusion 20 of the crimping ring 19 is fixed by crimping the terminal piece 15 (15A, 15B, 15C) and the tip of the shield braided tube 12 between the crimping ring 19 and the crimping ring 19. The caulking ring 19 is annular and formed from an aluminum-based metal.
Although not shown, in the present embodiment, the connecting portion between the shield pipe 11 (11A, 11B, 11C) and the shield braided tube 12 is protected by a grommet, and the corrugated tube protruding from one end of the grommet is used for the second region R2. The shield braided tube 12 is sheathed.

As described above, the cylindrical portion 14 (14A, 14B, 14C) of the shield terminal 13 (13A, 13B, 13C) is externally fitted to each shield pipe 11 (11A, 11B, 11C) in the first region R1 and fixed by caulking. And the terminal piece 15 (15A, 15B, 15C) protruded from the said cylinder part 14 (14A, 14B, 14C) is locked to the outer periphery of the backup ring 17 at intervals. With this configuration, each shield pipe 11 (11A, 11B, 11C) to which the shield terminal 13 (13A, 13B, 13C) is fixed and the backup ring 17 can be easily electrically connected.
Also, the backup braided tube 12 in the second region R2 is covered with the backup ring 17 to which the terminal pieces 15 (15A, 15B, 15C) are locked, and the caulking ring 19 is externally fitted to the outer periphery thereof. The terminal piece 15 (15A, 15B, 15C) and the tip of the shield braided tube 12 are clamped and fixed between them. With this configuration, the shield braided tube 12 can be electrically connected to the backup ring 17 with a uniform caulking force, and the contact between the terminal piece 15 (15A, 15B, 15C) and the backup ring 17 can be improved to ensure reliable electrical connection. Connection is possible.

  That is, according to the above configuration, electrical connection between the three shield pipes 11 (11A, 11B, 11C) in the first region R1 and one shield braided tube 12 in the second region R2 via the backup ring 17. Can be easily performed by a simple work process. Further, a slim connection structure in which the terminal piece 15 (15A, 15B, 15C) of the shield terminal 13 (13A, 13B, 13C) and the distal end portion of the shield braided tube 12 are sandwiched between the back-up ring 17 and the crimping ring 19 Therefore, the wiring to the vehicle is easy and the increase in the weight of the wire harness can be suppressed.

DESCRIPTION OF SYMBOLS 10 Electric wire 11 Shield pipe 12 Shield braided tube 13 Shield terminal 14 Cylinder part 15 Terminal piece 17 Backup ring 19 Caulking ring

Claims (2)

A wiring harness wiring structure for wiring to a hybrid vehicle or an electric vehicle,
A plurality of electric wires are passed through a shield pipe made of a metal pipe for each electric wire, and a first region in which the plurality of shield pipes are arranged close to each other in parallel,
A plurality of electric wires drawn out from the shield pipe, a second region that is inserted into one shield braided tube formed by knitting metal wires in a mesh shape, and
The electrical connection between each shield pipe in the first region and the shield braided tube in the second region is achieved by adding a shield terminal with a terminal piece projecting from the tip of the cylinder part by externally fitting the cylinder part to each shield pipe. Tighten and fix the terminal piece,
The terminal piece of each shield terminal is connected to the outer periphery of a backup ring made of an annular conductive metal material with a gap therebetween,
Put the tip of the shield braided tube over the backup ring with a shield terminal attached to the outer periphery,
A caulking ring is externally fitted to the outer periphery of the shield braided tube, and the caulking ring is fixed by crimping the terminal piece of the shield terminal and the tip of the shield braided tube between the backup ring and the caulking ring. The wiring structure of the connected wire harness.   The wiring structure for a wire harness according to claim 1, wherein the first area is a wiring area below the vehicle floor, and the second area is a wiring area in an engine room.

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