JP2012038673A - Wire harness - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a wire harness that requires no work to pass a wire through cylinder-shaped braided wires, can hold the arrangement state of a plurality of cables, and can be easily grounded.SOLUTION: The periphery of a plurality of flat cables 21 is covered with the braided wires 24, and a cover member 50 is attached to a wire bundle 2 in which the periphery of the braided wires 24 is covered with a second insulating coating 25. The terminal of each flat cable 21 is covered with the cover member 50, and the arrangement state of each flat cable 21 is thereby held constant. A window 58 is provided in the cover member 50, and the braided wires 24 extending from the second insulating coating 25 are exposed to the outside through the window 58. Accordingly, the wire harness 1 can be easily grounded by providing a structure for grounding the braided wires 24 through the window 58.

Description

  The present invention relates to a wire harness.

  Conventionally, in order to prevent noise from being transmitted to a wire harness connected to an electrical component mounted on an automobile, a technique in which a braided wire having a knitted structure covers the periphery of an electric wire constituting the wire harness is known. .

  For example, Patent Literature 1 discloses a technique in which a braided wire covers a plurality of electric wires and a braided wire is fixed to an electric wire by crimping a caulking fitting to a terminal of the braided wire. .

JP 2002-134953 A

  As disclosed in Patent Document 1, in order to cover a braided wire around a plurality of electric wires, it is generally necessary to pass the electric wires inside the braided wire formed into a cylindrical shape. is there. However, since the braided wire has a knitted structure and the electric wire is caught in the braid of the braided wire, it is difficult to smoothly carry out the operation of passing the electric wire inside the tubular braided wire. In addition, in order to prevent the electric wire from getting caught in the braid of the braided wire, it is possible to pass the electric wire by enlarging the tubular shape of the braided wire. It is difficult to make the contact tight, and the bumps will occur on the braided wire.

  The above problem is solved by performing extrusion molding on an electric wire wound around a flat braided wire. Since the covering portion of the insulator covers the outer periphery of the braided wire, the flat braided wire wound around the electric wire is fixed by the outer peripheral covering portion. This eliminates the need for an electric wire to pass inside the braided wire formed into a cylindrical shape, so that the operation of covering the braided wire around the electric wire can be efficiently advanced. Further, since the flat braided wire is pressed against the electric wire, the braided wire can be more closely attached to the electric wire, and an electric wire having a thickness smaller than that of the conventional wire can be obtained.

  However, in the above-described electric wire, since the periphery of the braided wire is covered by the covering portion, it is difficult to ground the braided wire via the bracket that has been caulked with the bracket as in the past. For this reason, in a wire harness provided with the above-mentioned electric wire, a special structure for grounding must be provided.

  Moreover, the wire harness provided with two or more above-mentioned electric wires connects the terminal block with which a device is provided, and the terminal of a wire harness terminal, for example in an apparatus like an inverter. At this time, it is desirable that each electric wire included in the wire harness can be held in a state of being arranged in accordance with the interval between the terminal holes provided in the terminal block. However, in addition to the structure for grounding the electric wires as described above, by providing a structure that can hold the electric wires in a predetermined arrangement state, the wire harness has a more complicated structure.

  The present invention has been made in view of the above problems, and it is not necessary to pass an electric wire through a tubular braided wire, and a wire harness that can maintain the arrangement state of a plurality of electric wires and can be easily grounded. The purpose is to provide.

  In order to solve the above-described problem, a wire harness according to a first aspect of the present invention collectively includes a plurality of insulated wires provided with terminals at the ends and provided with a first insulation coating, and a plurality of surroundings of the insulated wires. A plurality of insulated wires are held in parallel at a position on the base side of the terminal of the plurality of insulated wires, a second insulation coating covering the periphery of the braided wires covering the plurality of insulated wires, and a braided wire covering the plurality of insulated wires And a wire holding part that covers a plurality of the insulated wires, the braided wire, and the second insulating coating, and has a window that exposes a part of the braided wire to the outside. .

  A wire harness according to a second invention is the wire harness according to the first invention, wherein the insulated wire is a flat cable, and the plurality of flat cables are arranged side by side in the longitudinal direction of their respective transverse sections. It is characterized by.

  According to the first invention, the insulated wire can be held in a fixed positional relationship by the wire holding portion, and the wire holding portion is provided with a window that exposes a part of the braided wire to the outside. Therefore, the braided wire can be grounded easily.

  According to the second invention, the insulated wires are flat cables and are arranged side by side in the longitudinal direction. For this reason, since a member required for grounding is connected on the flat surface of the flat cable, the contact area becomes larger and grounding can be performed steadily.

It is a top view of the principal part of the wire harness 1 which concerns on embodiment of this invention. 2 is a cross-sectional view of a main part of the wire harness 1. FIG. 2 is a front view of a main part of the wire harness 1. FIG. It is sectional drawing of the electric wire with which the wire harness 1 is provided.

  Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings. The following embodiment is an example embodying the present invention, and does not limit the technical scope of the present invention.

  The wire harness 1 which concerns on embodiment of this invention has the role which electrically connects between the said electrical equipments, when the both ends are connected between electrical equipments, such as an inverter and a motor. Initially, the wire bundle 2 with which the wire harness 1 is provided is demonstrated, referring FIG.

  As shown in FIG. 4, the electric wire bundle 2 includes a plurality of electric wires, and a flat cable 21 is used as the electric wires in the present embodiment. The flat cable 21 has higher heat dissipation than a general electric wire, and can suppress a temperature rise in the flat cable 21. For this reason, since the raise of the resistance value of the flat cable 21 accompanying a temperature rise is suppressed, a higher electric current can be sent. The flat cable 21 has a structure in which a plurality of linear conductors 22 arranged in parallel are covered with a first insulating coating 23 made of an insulator such as resin. 4 shows a flat cable 21 having a structure in which five conductors 22 are covered with a first insulating coating 23, the flat cable 21 may have any number of conductors 22. I do not care. Moreover, although the electric wire bundle 2 shown by FIG. 4 is equipped with the three flat cables 21 arrange | positioned in parallel in order to transmit the electric power of three-phase alternating current, the number of the flat cables 21 in the electric wire bundle 2 is as follows. Two or more than four are also conceivable. Moreover, in this Embodiment, although the flat cable 21 is used, other forms, such as a cross section having a circular shape or a rectangular shape, are also considered for the form of an electric wire.

  Furthermore, the wire harness 1 includes a braided wire 24 that collectively covers the outer periphery of the plurality of flat cables 21 as described above. The braided wire 24 is a conductor having a structure in which a linear metal bundle formed by twisting metal thin wires such as tin-plated copper wires is knitted. Since the braided wire 24 has the knitting structure as described above, it has elasticity.

  The outer periphery of the braided wire 24 covered with the outer periphery of the flat cable 21 is covered with a second insulating coating 25. Such a structure in which the outer periphery of the braided wire 24 is covered with an insulator can be obtained by subjecting the bundle of the flat cable 21 around which the braided wire 24 is wound to extrusion molding of resin. By covering the outer periphery of the braided wire 24 with the second insulating coating 25, the state in which the braided wire 24 covers the periphery of the plurality of flat cables 21 is maintained. By such a process, the operation | work which lets an electric wire pass to the cylindrical braided wire 24 can be made unnecessary. Therefore, the work of covering the braided wire 24 around the flat cable 21 can be performed without much trouble. In addition, since the braided wire 24 can be covered around the flat cable 21 without causing the braided wire 24 to overlap, the thickness of the flat cable 21 covered with the braided wire 24 can be reduced. Thus, the wire bundle 2 is constituted by the flat cable 21, the braided wire 24, and the second insulating coating 25.

  Then, the wire harness 1 shown by FIGS. 1-3 is demonstrated. The wire harness 1 has a structure in which a plurality of exterior members are attached around the wire bundle 2 described above. In this Embodiment, the exterior member attached to the wire bundle 2 is the corrugated tube 30 and the wire holding part 60, and the circumference | surroundings of the wire bundle 2 are covered with these exterior members. In FIG. 2, the wire bundle 2 excluding the braided wire 24 is not hatched for easy understanding of the arrangement relationship.

  The first insulation coating 23, the braided wire 24, and the second insulation coating 25 are peeled off from the periphery of the conductor 22 of a certain length in advance at the end of the wire bundle 2 to which the wire holding unit 60 is attached. It will be in the state. Subsequently, the braided wire 24 and the second insulating coating 25 of a certain length are peeled off at a portion of the wire bundle 2 on the base side of the exposed conductor 22, that is, a portion where the first insulating coating 23 is left. It is made to the state. Further, the second insulating coating 25 for a certain length is peeled off at the base portion of the exposed first insulating coating 23, that is, at the portion where the braided wire 24 remains. Thus, the wire bundle 2 is processed in a state in which the conductor 22, the first insulating coating 23, and the braided wire 24 are exposed from the end of the wire bundle 2 by a certain length.

  In the present embodiment, a portion of the electric wire bundle 2 that has been subjected to the above-described processing and whose outer periphery is covered with the second insulating coating 25 is covered with the corrugated tube 30. The corrugated tube 30 is an accordion-shaped electric wire protector in which crests 301 and troughs 302 are alternately continued along the axial direction of the electric wire bundle 2 covered with the corrugated tube 30. By passing the electric wire bundle 2 inside the corrugated tube 30, the electric wire bundle 2 is protected without receiving direct interference from the surroundings.

  An electric wire holding part 60 is provided at the end of the corrugated tube 30. The electric wire holding part 60 includes a main body member 40 and a cover member 50 attached to the main body member 40. In the present embodiment, the main body member 40 and the cover member 50 are separate members, but the main body member 40 and the cover member 50 may be integrally formed. That is, the electric wire holding part 60 may be formed integrally or may be composed of a plurality of members.

  The main body member 40 covers the end portion of the second insulating coating 25. The main body member 40 is produced, for example, by resin insert molding in which the end of the wire bundle 2 is to be embedded. In a state where the main body member 40 is attached to the second insulating coating 25, a portion extending from the base side of the braided wire 24 to the conductor 22 of the terminal is exposed. And one terminal 70 is crimped | bonded with respect to the conductor 22 of each flat cable 21, and the flat cable 21 and the terminal 70 are connected. Therefore, in the present embodiment, three terminals 70 are connected at the terminal of the wire harness 1.

  In the main body member 40, a first small diameter portion 44, a second small diameter portion 42, and a large diameter portion 41 are provided in order from the terminal side of the wire bundle 2. The first small diameter portion 44 has an outer diameter smaller than the surrounding diameter, and the outer peripheral surface of the first small diameter portion 44 and the inner peripheral surface of the cover member 50 are fitted together, whereby the cover member 50 and the main body are fitted. The member 40 is connected. The second small diameter portion 42 is recessed in the outer periphery of the main body member 40, and the outer diameter is smaller than the surrounding diameter, like the first small diameter portion 44. A waterproof member 43 made of, for example, rubber or the like is fitted into the second small diameter portion 42 and covers the outer periphery of the main body member 40. The large diameter portion 41 is provided in a flange shape so as to protrude to the periphery at the end of the main body member 40.

  The cover member 50 is a molded resin member, and is a portion between the terminal 70 attached to the conductor 22 and the main body member 40 attached to the second insulating coating 25, that is, an end portion of the second insulating coating 25, a braided wire. 24, covering the outer periphery of the first insulating coating 23; The cover member 50 has a structure in which a first member 501 and a second member 502 are sequentially connected from the terminal side of the wire harness 1. The first member 501 mainly covers the outer periphery of the first insulating coating 23, and the second member 502 mainly covers the range extending from the end of the second insulating coating 25 to the braided wire 24.

  The cover member 50 includes an arrangement direction of the plurality of flat cables 21 in the electric wire bundle 2 (hereinafter may be simply referred to as “an arrangement direction”), and an extending direction of the braided wire 24 and the first insulating coating 23 (hereinafter, referred to as “an arrangement direction”). And an upper member provided on one side along a direction orthogonal to a plane defined by (hereinafter, also referred to as a “height direction”). 50a and the lower member 50b provided on the other side are combined to be attached to the end of the wire bundle 2. Specifically, both ends on the outer side in the width direction of the first member 501b constituting the lower member 50b are formed in joining grooves (not shown) provided on both ends on the outer side in the arrangement direction of the first member 501a constituting the upper member 50a. The cover claw 50 is held in a combined state by fitting a joint claw (not shown) provided on the cover.

  In the side wall 55 provided along the arrangement direction constituting the second member 502, a gap is formed between the outer periphery of the first insulating coating 23 of the flat cable 21 and the side wall 55. Since the leading end of the braided wire 24 fits in this gap, the state where the braided wire 24 is in close contact with the flat cable 21 is maintained.

  A window 58 is provided over a predetermined range on the upper surface of the second member 502a of the upper member 50a. Therefore, the bare braided wire 24 covered with the second member 502 is exposed to the outside through the window 58.

  The plurality of flat cables 21 are placed on the bottom surface inside the first member 501a constituting the lower member 50b. A space is formed between the inner surface of the upper first member 501a and the upper surface of the first insulating coating 23 along the height direction. A wall 57 along the arrangement direction is provided at the end of the first member 501a constituting the upper member 50a inside the first member 501a so as to fill this space, at the end of the connecting portion with the second member 502a constituting the upper member 50a. Is provided. By combining the upper member 50a and the lower member 50b constituting the cover member 50, the wall portion 57 presses the first insulating coating 23 toward the lower member 50b. Thereby, the positional deviation in the height direction and arrangement direction of each flat cable 21 extended from the wire bundle 2 is suppressed.

  The first member 501b in the lower member 50b is provided with a partition wall portion 54 along the extending direction, and each flat cable 21 is disposed between the partition wall portion 54 and the partition wall portion 54. Therefore, the arrangement state of the flat cables 21 arranged on the first member 501 is held by the partition wall portion 54.

  Since such a wire harness 1 is connected to a terminal block (not shown) of an electrical equipment such as an inverter, for example, the end of the wire harness 1, that is, the end of the wire bundle 2 provided with the terminal 70 is connected to the terminal block. It is inserted into the inside through a fitting opening provided in an electric box provided with a base. Furthermore, the main body member 40 is pushed into the fitting port in a state where the side surface of the large diameter portion 41 is in contact with the side wall of the fitting port. As described above, the outer periphery of the main body member 40 is covered with the waterproof member 43 made of rubber or the like. For this reason, the waterproof member 43 adheres to the inner surface of the fitting opening, and the inner space of the electric box is sealed. This can prevent moisture from entering the electric box from the outside. The terminal hole 71 provided in each terminal 70 is screwed in the screw hole of the corresponding terminal block, whereby the wire harness 1 and the terminal block are connected.

  In the present embodiment, a window 58 is provided on the upper surface of the cover member 50 over a predetermined range. For this reason, the braided wire 24 is exposed to the outside through the window 58 inside the second member 502. Therefore, a conductor as a separate member is pressed against the braided wire 24 through the window 58 and can be grounded through the conductor. Thus, even if the outer periphery of the braided wire 24 is covered with the second insulating coating 25, the wire harness 1 does not need to be provided with a complicated structure for grounding by the window 58 provided in the cover member 50. Can be grounded easily.

  In particular, in the present embodiment, since the flat cable 21 is used, the conductor, which is a separate member, is pressed against the flat surface of the flat cable 21 through the window 58 provided in the cover member 50. . Accordingly, since the contact area between the conductor and the braided wire 24 is increased, the grounding is more steadily performed.

  As described above, in the present embodiment, the operation of passing the flat cable 21 through the tubular braided wire 24 is made unnecessary by performing resin extrusion molding on the flat cable 21 wound with the braided wire 24. be able to. Further, the cover member 50 covers the end portion of the electric wire bundle 2 in which the first insulating coating 23 and the braided wire 24 are exposed. Each flat cable 21 is connected to the terminal block while being held in a predetermined positional relationship by the partition wall portion 54 provided on the cover member 50. The cover member 50 is provided with a window 58, and the braided wire 24 is exposed to the outside through the window 58. For this reason, the conductor which is another member can be pressed against the braided wire 24 through the window 58, and the wire harness 1 can be earth | grounded through the said conductor. Thus, by providing the window 58 in the cover member 50 and exposing the braided wire 24 to the outside through the window 58, the wire harness 1 can be grounded without providing a complicated structure for grounding. It becomes.

  Note that the present invention is not limited to the above-described embodiment, and may be in other forms. In the said embodiment, although the corrugated tube 30 covered the 2nd insulation coating 25 of the wire bundle 2, it is not restricted to such a form. The corrugated tube 30 may not necessarily be provided.

  Further, as described above, the method of grounding the wire harness 1 through the window 58 may be a structure in which a conductor as a separate member is pressed against the braided wire 24 exposed to the outside, Other forms may be used. That is, as long as the braided wire 24 exposed to the outside by the window 58 is grounded, any form may be used.

DESCRIPTION OF SYMBOLS 1 Wire harness 2 Wire bundle 21 Flat cable 22 Conductor 23 1st insulation coating 24 Braided wire 25 2nd insulation coating 30 Corrugated tube 40 Main body member 43 Waterproof member 50 Cover member 60 Electric wire holding part 58 Window 70 Terminal

Claims (2)

A plurality of insulated wires each having a terminal provided with a first insulation coating;
A braided wire that collectively covers the periphery of the plurality of insulated wires;
A second insulation coating covering the periphery of the braided wire covering a plurality of the insulated wires;
Covering the plurality of insulated wires, the braided wire and the second insulating coating while holding the plurality of insulated wires in a parallel state at a position on the base side of the terminals in the plurality of insulated wires, An electric wire holding part in which a window exposing a part to the outside is formed;
A wire harness comprising: The wire harness according to claim 1,
The insulated wire is a flat cable, and the plurality of flat cables are arranged side by side in the longitudinal direction of their respective transverse cross sections.

Images