JP6158539B2 - Electric wire branching structure - Google Patents

Description

  The present invention relates to an electric wire branching structure.

  A conventional electric wire branching structure 201 will be described with reference to FIGS.

  The terminal block in which the electric wire branching structure 201 is adopted is used as a terminal block mounted inside an inverter (INV), for example.

  The electric wire branching structure 201 includes a circuit A and a circuit B. A branch connection point 203 is formed at an intermediate portion of the circuit A, and a branch connection point 205 is also formed at an intermediate portion of the circuit B. . Each branch connection point 203, 205 is connected to the inside of INV.

  The electric wire branching structure 201 includes a housing 207, four electric wires 209, 211, 213, and 215, four terminals 217, 219, 221, and 223, and four branch terminals 225, 227, 229, and 231. It is configured.

  Each of the terminals 217, 219, 221, and 223 and each of the branch terminals 225, 227, 229, and 231 are appropriately installed on each of the electric wires 209, 211, 213, and 215 by barrel caulking.

  The terminals 217 and 221 are installed in the housing 207 in a state where the electric wire 209 and the electric wire 213 are connected via the branch terminal 225 and the branch terminal 229. Similarly, the terminals 219 and 223 are installed in the housing 207 in a state where the electric wire 211 and the electric wire 215 are connected via the branch terminal 227 and the branch terminal 231.

  Moreover, what is shown by patent document 1 can be mention | raise | lifted as a conventional branch structure of the electric wire using a bus bar, for example.

JP-A-2005-93166

  By the way, in the branch structure of the conventional electric wire, since it has four electric wires and the terminal is provided in the edge part of these electric wires, there exists a problem that the number of parts is large and a structure is complicated.

  Further, in order to obtain a conventional electric wire branching structure, each of the four electric wires is peeled off (the covering is removed for terminal installation), and terminals are provided at the eight portions where the peeling is made. The process of installing is necessary.

  Further, in order to obtain a conventional electric wire branching structure, the branch terminals are overlapped and fastened together using screws (not shown), but when the branch terminals are overlapped, the terminal twists (the branch terminal with respect to the terminal and A process of adjusting in consideration of twisting with the electric wire is necessary.

  There is a problem that man-hours for obtaining a branch structure of a conventional electric wire are increased due to the necessity of each of these steps and the large number of parts described above.

  Moreover, the branch structure using the bus bar described in Patent Document 1 has a problem that the degree of freedom in wiring is reduced by using the bus bar instead of the electric wire.

  The present invention has been made in view of the above problems, and provides an electric wire branching structure that can reduce the number of manufacturing steps with a simpler structure than the conventional one while ensuring the degree of freedom of the electric wire routing. With the goal.

The invention described in claim 1 is provided in a housing including a first terminal installation portion and a second terminal installation portion, an electric wire, and one end of the electric wire, and is installed in the first terminal installation portion. A first terminal that is provided, a second terminal that is provided at the other end portion of the electric wire and is provided at the second terminal installation portion, and an intermediate terminal provided at the electric wire at an intermediate portion of the electric wire; have a core wire of the electric wire is an elongated cylindrical solid wire material is composed of a conductive material, wherein the first terminal and the second terminal, longitudinal ends of the material It is the branch structure of the electric wire currently formed in the state which chamfered the part .

According to a second aspect of the present invention, in the electric wire branching structure according to the first aspect, the intermediate terminal is formed in a state in which the intermediate portion in the longitudinal direction of the material is crushed, and the element wire It is the branch structure of the electric wire which protrudes in the one side of the radial direction .

  Advantageous Effects of Invention According to the present invention, there is an effect that it is possible to provide an electric wire branching structure that can reduce the number of manufacturing steps with a simpler configuration than the conventional one while securing the degree of freedom of electric wire routing.

It is a perspective view which shows the terminal block with which the branch structure of the electric wire which concerns on the 1st Embodiment of this invention is employ | adopted. It is a disassembled perspective view of the terminal block by which the branch structure of the electric wire which concerns on the 1st Embodiment of this invention is employ | adopted. BRIEF DESCRIPTION OF THE DRAWINGS It is a perspective view which shows the terminal and electric wire which comprise the branch structure of the electric wire which concerns on the 1st Embodiment of this invention, (a) has shown the state before installing a terminal in an electric wire, (b) is an electric wire. The state where the terminal has been installed is shown. It is a perspective view which shows the terminal block by which the branch structure of the electric wire which concerns on the 2nd Embodiment of this invention is employ | adopted. It is a disassembled perspective view of the terminal block by which the branch structure of the electric wire which concerns on the 2nd Embodiment of this invention is employ | adopted. It is a perspective view which shows the terminal and electric wire which comprise the branch structure of the electric wire which concerns on the 2nd Embodiment of this invention, (a) has shown the state before forming a terminal in an electric wire, (b) is an electric wire. The state where the terminal has been formed is shown. It is a perspective view which shows the branch structure of the conventional electric wire. It is a disassembled perspective view which shows the branch structure of the conventional electric wire. It is a perspective view which shows the terminal and electric wire which comprise the branch structure of the conventional electric wire, (a) has shown the state before installing a terminal in an electric wire, (b) has finished installing the terminal in an electric wire Is shown.

[First Embodiment]
The terminal block 3 in which the electric wire branching structure 1 according to the first embodiment of the present invention is adopted is used as, for example, a terminal block mounted inside an in-vehicle inverter (INV).

  As shown in FIGS. 1 and 2, the electric wire branching structure 1 includes a housing 5, an electric wire 7, a first terminal 9, a second terminal 11, and an intermediate terminal (flag terminal) 13. Yes.

  The housing 5 includes a first terminal installation portion 15 and a second terminal installation portion 17 and is made of a material such as an insulating synthetic resin.

  The first terminal 9 is provided at one end of the electric wire 7 in the longitudinal direction. The second terminal 11 is provided at the other end of the electric wire 7 in the longitudinal direction. The first terminal 9 is inserted into the first terminal installation portion 15 and is installed integrally with the first terminal installation portion 15. The second terminal 11 is inserted into the second terminal installation part 17 and is installed integrally with the second terminal installation part 17.

  The electric wire 7 is continuous without being divided at the intermediate portion in the longitudinal direction, and the intermediate portion in the longitudinal direction of the electric wire 7 is separated from the housing 5. The intermediate terminal 13 is provided on the electric wire 7 at an intermediate portion in the longitudinal direction of the electric wire 7.

  When the terminal block 3 is mounted inside the inverter (INV), the terminals 9 and 11 are connected to the terminals of the inverter, and power is supplied from the intermediate terminals to other devices (inverters). It has become so.

  The electric wire 7 includes a core wire and a covering 21 that covers the core wire. At one end portion in the longitudinal direction of the electric wire 7, the covering body 21 is removed and the core wire 19 is exposed, and the first terminal 9 is installed on the core wire 19 exposed at one end portion of the electric wire 7.

  Even at the other end portion of the electric wire 7, the covering 21 is removed and the core wire 19 is exposed, and the second terminal 11 is installed on the core wire 19 exposed at the other end portion of the electric wire 7. Even in the middle portion of the electric wire 7 in the longitudinal direction, the covering 21 is removed and the core wire 19 is exposed, and the intermediate terminal 13 is installed on the core wire 19 exposed in the middle portion of the electric wire 7.

  The first terminal 9, the second terminal 11, and the intermediate terminal 13 are made of a conductive material such as metal, and are separated from the electric wire 7 before being installed on the electric wire 7 (before assembly). Yes.

  The first terminal 9 is integrally installed on the core wire (conductive wire) 19 of the electric wire 7 by, for example, caulking at one end portion in the longitudinal direction of the electric wire 7. The second terminal 11 is integrally installed on the core wire 19 of the electric wire 7 by, for example, caulking at the other end portion in the longitudinal direction of the electric wire 7. The intermediate terminal 13 is an intermediate portion in the longitudinal direction of the electric wire 7 and is integrally installed on the core wire 19 of the electric wire 7 by caulking, for example. The intermediate terminal 13 is separated from the first terminal 9 and the second terminal 11 and the housing 5.

  Instead of or in addition to crimping, the terminals 9, 11, and 13 may be installed on the core wire 19 of the electric wire 7 by other methods such as brazing, soldering, and welding.

  The housing 5 includes cylindrical terminal installation portions 15 and 17, a connecting portion 23, and a protrusion 25. The cylindrical terminal installation portions 15 and 17 are separated from each other by a predetermined distance and are connected by a connecting portion 23, and the central axes thereof extend in parallel. The protrusion 25 is used when the terminal block 3 is installed on another device using a bolt or the like, and is provided in each of the terminal installation portions 15 and 17.

  The core wire 19 of the electric wire 7 is comprised by the strand wire, for example. That is, it is composed of a plurality of thin conducting wires (copper, copper alloy, elongated metal strands such as aluminum or aluminum alloy).

  The covering body 21 of the electric wire 7 is formed in a cylindrical shape with an insulating synthetic resin and covers the core wire 19. That is, the core wire 19 enters the through hole of the cylindrical covering body 21, and the core wire 19 and the covering body 21 are integrated.

  However, the portion from one end in the longitudinal direction of the electric wire 7 to the vicinity of the one end is not peeled off due to the peeling, and the core wire 19 is exposed. Similarly, in the portion from the other end in the longitudinal direction of the electric wire 7 to the vicinity of the other end, the covering 21 is not present and the core wire 19 is exposed. Furthermore, the covering body 21 is not present and the core wire 19 is exposed over a predetermined slight length even in the middle portion of the electric wire 7 in the longitudinal direction.

  As understood from the above, in one electric wire 7, the core wire 19 extends over the entire length of the electric wire 7, but the covering body 21 is divided into two at the intermediate portion in the longitudinal direction of the electric wire 7.

  Moreover, the electric wire 7 is provided with flexibility. For example, it can be easily bent by applying force to the electric wire 7 with a human finger. Further, it may be bent by its own weight.

  The terminal 9 (terminal 11) and the intermediate terminal 13 are generated by forming a flat plate material having conductivity such as metal into a predetermined shape and then bending it appropriately.

  The terminal 9 (terminal 11) includes a terminal contact portion 27 and a wire connecting portion (core wire connecting portion) 29. The terminal 9 (terminal 11) is installed in the electric wire 7 by crimping the electric wire connection part 29. FIG. The terminal contact portion 27 protrudes from both ends in the longitudinal direction of the electric wire 7.

  The intermediate terminal 13 also includes a terminal contact portion 31 and an electric wire connection portion (core wire connection portion) 33. The intermediate terminal 13 is installed on the electric wire 7 by caulking the electric wire connecting portion 33.

  The terminal block 3 in which the electric wire branching structure 1 is employed is configured to include, for example, two electric wires 7 and forms a circuit A and a circuit B. Each of the electric wires 7 is provided with terminals 9 and 11 and an intermediate terminal 13. Two first terminals 9 are installed in the first terminal installation section 15, and two second terminals 11 are installed in the second terminal installation section 17. The two electric wires 7 including the terminals 9, 11, and 13 are separated from each other and are in a non-conductive state.

  Next, assembly of the terminal block 3 will be described.

  First, as shown in FIG. 3A, the covering body 21 of the electric wire 7 is appropriately removed to expose the core wire 19, and preparation for installation of the terminals 9, 11, and 13 is made.

  Subsequently, as shown in FIG. 3B, the terminals 9, 11, and 13 are installed on the electric wire 7 by caulking. Two things shown in FIG. 3B are prepared.

  Subsequently, as shown in FIG. 2, preparation is made for installation of the electric wire 7 on which the terminals 9, 11, and 13 are installed in the housing 5.

  Then, each terminal 9 and 11 is installed in each terminal installation part 15 and 17 of the housing 5, and the terminal block 3 is obtained as shown in FIG.

  According to the branch structure 1 of the electric wire, the number of the electric wires 7 is two as compared with the conventional one by providing the branch connection point (intermediate terminal 13) in the middle of the electric wire 7 without dividing the electric wire as in the prior art. The number of intermediate terminals 13 is reduced by two (from four to two), and the number of components is reduced. . Thereby, the structure of the branch structure 1 of an electric wire is simplified and the manufacturing man-hour is reduced.

  Moreover, according to the branch structure 1 of an electric wire, since the intermediate terminal 13 is provided in the intermediate part of the electric wire 7 without dividing an electric wire unlike the conventional case, the branch terminals are connected to each other as in the conventional electric wire branch structure. There is no need to pile up. This eliminates the need for adjustment in consideration of the twist of the intermediate terminal 13 and the electric wire 7 with respect to the terminals 9 and 11, thereby reducing the number of manufacturing steps.

  Moreover, since what is shown in patent document 1 and using the electric wire 7 instead of a bus bar, the freedom degree of the wiring of the electric wire 7 is ensured.

  Conventionally, in FCC (flexible flat cable), etc., a structure is known in which the covering of the middle part is removed and the wires are overlapped and connected by welding or the like, but this is done when the terminal block is assembled to the inverter. Is difficult in terms of space. On the other hand, in the electric wire branching structure 1, since the configuration is simplified by providing the intermediate terminal 13 in the intermediate portion of the electric wire 7, the space required for installation is made smaller than that using the FCC or the like. It becomes easy to assemble the terminal block 3 to the inverter.

  Moreover, according to the branch structure 1 of an electric wire, since the electric wire 7 is flexible, the electric wire 7 can be easily routed. Moreover, although the electric wire 7 has flexibility, since the intermediate terminal 13 is provided in the intermediate part of the electric wire 7, the electric wire 7 which has flexibility will bend more than necessary. Can be appropriately prevented.

[Second Embodiment]
In the electric wire branching structure 1a according to the second embodiment of the present invention, as shown in FIG. 4 and the like, the core wire 19a of the electric wire 7a is constituted by a single core, and the first terminal 9 and the second terminal 11 are formed. Unlike the electric wire branching structure 1 according to the first embodiment, the intermediate terminal 13 is generated from the material (meat) constituting the core wire 19a of the electric wire 7a. It has substantially the same configuration as the electric wire branching structure 1 according to the embodiment, and has substantially the same effect.

  In the electric wire branching structure 1a, all of the terminals 9, 11, 13 are processed into the core wire 19a of the electric wire 7a formed of a single core (for example, plastic processing such as crushing processing, chamfering processing, etc. It is formed by cutting.

  More specifically, the electric wire 7a is not provided with a covering, and is composed of only a single core wire 19a. The single core wire 19a has a shape obtained by appropriately bending an elongated columnar material. Further, unlike the stranded wire, the single core wire 19a can maintain its shape by itself. That is, the core wire 19a has a rigidity that can be regarded as a rigid body with almost no deformation when applied with its own weight or the force of a human finger (bare hand). When the core wire 19a is bent and plastically deformed, or when the intermediate terminal 13 is formed by plastic deformation, it is necessary to apply a large force with a tool or the like.

  In order to obtain the electric wire 7a provided with the terminals 9, 11, 13, first, an elongated columnar material made of a conductive material such as metal is prepared. And an appropriate bending process is given to this raw material (refer Fig.6 (a)). Subsequently, the intermediate terminal 13 is formed by crushing the intermediate portion in the longitudinal direction of the material, and the first terminal 9 and the second terminal 11 are formed by chamfering both ends in the longitudinal direction of the material. (See FIG. 6B).

  Note that the first terminal 9 and the second terminal 11 may be formed by plastic processing instead of cutting, or the through hole provided in the intermediate terminal 13 may be formed by cutting. .

  The terminals 9, 11, 13 of the electric wire 7a thus obtained are installed in the terminal installation portions 15, 17 of the housing 5 to obtain the terminal block 3 (see FIGS. 4 and 5).

  According to the branch structure 1a of the electric wire, since the core wire 19a of the electric wire 7a is configured with a single core having high rigidity, the electric wire 7a appropriately bent can secure its own path (shape), and the core wire 19a. The insulator (covering body) which covers is no longer necessary, and the configuration can be further simplified. Moreover, since a covering body is unnecessary, peeling is unnecessary, and the number of manufacturing steps can be further reduced.

  Further, since each terminal 9, 11, 13 is formed of a core wire, it is not necessary to prepare a terminal separately, the configuration can be further simplified, and the number of manufacturing steps can be further reduced.

  In addition, the probability that an insulation failure occurs between the core wire 19a and the terminals 9, 11, and 13 can be further reliably reduced as compared with the case where a separate terminal is installed.

  In the above description, all the terminals 9, 11, 13 are formed by processing the core wire 19a, but at least one of the terminals 9, 11, 13 is processing the core wire 19a. May be formed. For example, the first terminal 9 and the second terminal 11 may be configured separately from the core wire 19a and installed on the core wire 19a by caulking.

  Moreover, the core wire 19a may be covered with the covering body similarly to the branch structure 1 of the electric wire according to the first embodiment.

  Moreover, in the branch structure 1 of the electric wire according to the first embodiment, the core wire 19 of the electric wire 7 may be configured with a single core similarly to the branch structure 1a of the electric wire according to the second embodiment.

DESCRIPTION OF SYMBOLS 1, 1a Branch structure of an electric wire 5 Housing 7, 7a Electric wire 9 1st terminal 11 2nd terminal 13 Intermediate terminal 15 1st terminal installation part 17 2nd terminal installation part 19, 19a Core wire 21 Covering body

Claims (2)

A housing including a first terminal installation portion and a second terminal installation portion;
Electric wires,
A first terminal provided at one end of the electric wire and installed in the first terminal installation unit;
A second terminal provided at the other end of the electric wire and installed at the second terminal installation unit;
An intermediate terminal provided on the electric wire at an intermediate portion of the electric wire;
Have a core wire of the electric wire is an elongated cylindrical solid wire material is composed of a conductive material, wherein the first terminal and the second terminal, longitudinal ends of the material A branch structure for an electric wire, characterized in that the wire is chamfered . In the branch structure of the electric wire according to claim 1,
The said intermediate terminal is formed in the state which gave the crushing process to the intermediate part of the longitudinal direction of the said raw material, and protrudes in the one side of the radial direction of the said strand, The branch structure of the electric wire characterized by the above-mentioned .

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