JP2011093400A - Electrical connection box - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an electrical connection box with a new structure capable of obtaining efficient vehicle wiring in a vehicle in which a battery is placed in a rear luggage room. <P>SOLUTION: As electrical connection boxes 10, a first electrical connection box 12 arranged in the rear section of the vehicle 104, and a second electrical connection box 14 arranged in the front section of the vehicle 104 are adopted. The battery 102 and the first electrical connection box 12 are connected with an input line 110. The first electrical connection box 12 and the second electrical connection box 14 are connected with a connection line 114. Electricity is supplied to the outside from the first electrical connection box 12 and the second electrical connection box 14, respectively. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to an electrical junction box mounted on an automobile or the like.

  Conventionally, electrical connection boxes such as fuse boxes and relay boxes have been provided on power supply paths that supply power from batteries to various electrical components such as lights and horns in automobiles for the purpose of improving the efficiency of the power supply circuit and improving maintainability. It is arranged. That is, generally, a fuse box as described in Japanese Patent Application Laid-Open No. 2008-125317 (Patent Document 1) is arranged in an engine room in a front bonnet of an automobile together with a battery. The terminals are connected by a large-diameter feeder line. The power supplied to the input terminal of the fuse box is branched by a branch circuit formed by a bus bar or the like incorporated in the fuse box, and distributed and supplied to various electrical components via the fuse. ing.

  By the way, in recent years, it has been considered to arrange a battery in a luggage room at the rear of the vehicle for reasons such as layout and weight distribution of a power unit, a power storage unit, and the like.

  However, in the conventional automobile, even when the battery is arranged in the luggage room, the conventional structure in which the battery is arranged in the engine room is used as it is as a power supply circuit for various electrical components such as an electric junction box. For this purpose, a large-diameter power supply line is routed from the battery placed at the rear of the vehicle to the fuse box in the engine room in front of the vehicle, and then power is distributed to the various electrical components from the fuse box. Compared with the case where the power supply line is arranged, there is a problem that a large-current power supply line is lengthened and wiring efficiency is lowered, and a short circuit on the high-current power supply line is also increased.

JP 2008-125317 A

  The present invention has been made in the background of the above-mentioned circumstances, and the problem to be solved is that it has a novel structure that enables efficient vehicle wiring in a vehicle in which a battery is placed in the rear luggage room. To provide a connection box.

  According to a first aspect of the present invention, in an electrical junction box mounted on a vehicle in which a battery is placed in a rear luggage room, the first electrical junction box disposed at the rear portion of the vehicle and the front portion of the vehicle are disposed. A second electrical connection box, and an input terminal to which an input line connected to the electrode of the battery is mounted is provided in the first electrical connection box, and the first electrical connection box and the second electrical connection box are provided. And connecting the first electric connection box to the first electric connection box to which a connection line for connecting the electric power of the battery to the second electric connection box is supplied via the first electric connection box. And a first branch circuit for branching the power fed from the input terminal into a plurality of power supplies in the first electrical junction box and supplying power externally while providing the box and the second electrical junction box respectively. Before in the second electrical junction box In that a second branch circuit for feeding to the outside branches the power fed from the connecting terminal to a plurality, characterized.

  According to the first aspect, in a vehicle having a specific structure in which a battery is placed in the rear luggage room, the first electrical connection box disposed at the rear of the vehicle and the second electrical connection disposed at the front of the vehicle Adopting a combination of boxes enables efficient wiring from the first and second electrical connection boxes to the electrical components provided at the rear and front of the vehicle, and also improves maintenance. Can be.

  Further, in the first electrical junction box, power can be taken in from a battery provided at the rear of the vehicle, and electrical wiring can be performed directly to an electrical component mounted at the rear of the vehicle via a fuse, a relay, or the like. Therefore, compared to the conventional structure in which the wire harness is laid once from the battery at the rear of the vehicle to the fuse box in the engine room and then again from the fuse box to the electrical components at the rear of the vehicle, The routing efficiency can be greatly improved. The vehicle rear refers to an area on the vehicle rear side from the front seat installation location.

  According to a second aspect of the present invention, in the first electrical connection box according to the first aspect, the input terminal and the connection terminal are constituted by separate bolt terminals, and A connection plate provided with an insertion hole at a position corresponding to the bolt terminal is used, and each bolt terminal is inserted into each insertion hole of the connection plate, and the input is input to each bolt terminal. The connection plate is fastened and fixed together with the wire and the connection wire.

  According to the 2nd aspect, the input terminal from a battery and the connection terminal to a 2nd electrical junction box can be provided compactly, and an energization line can be compactly attached to each terminal. Therefore, it is also possible to take out the input line and the connection line in parallel outward, for example, compared to the case where each terminal is shifted to the one connection bolt in the circumferential direction and attached to each other, The space efficiency of the first electrical junction box can be improved and the overall size can be reduced.

  In the present invention, since external power feeding is performed from each of the first electrical junction box and the second electrical junction box, efficient vehicle wiring can be realized.

Schematic of the electrical junction box as one embodiment of the present invention. The top view of the 1st electrical junction box which comprises the electrical junction box shown in FIG. III-III sectional drawing in FIG. FIG. 4 is a partially cutaway sectional view in the IV-IV direction in FIG. 2. The top view of the electrical-connection box main body which comprises the 1st electrical-connection box shown in FIG. FIG. 6 is a bottom view of the electric junction box body shown in FIG. 5.

  Embodiments of the present invention will be described below with reference to the drawings.

  FIG. 1 schematically shows an electrical junction box 10 as an embodiment of the present invention. The electrical junction box 10 includes a first electrical junction box 12 and a second electrical junction box 14. In the following description, the vertical direction of the first electrical connection box 12 refers to the vertical direction in FIG. 4, and the horizontal direction of the first electrical connection box 12 refers to the horizontal direction in FIG.

  As shown in FIGS. 2 to 6, the first electrical junction box 12 includes an electrical junction box main body 16 having a substantially rectangular block shape as a whole. A bolt support portion 18 is provided on one end side (right side in FIG. 2) in the longitudinal direction of the electrical junction box body 16, and two bolt terminals 20a and 20b are attached thereto. Further, the electrical connection box body 16 is provided with a connector mounting portion 22, a relay mounting portion 24, and a fuse mounting portion 26 that are open on the upper surface.

  More specifically, the bolt support portion 18 has a substantially rectangular flat plate shape, and each of the upper surface 28 and the lower surface 30 extends perpendicularly to the height direction of the electrical junction box body 16. Two bolt mounting holes 32 a and 32 b penetrating in the thickness direction are formed in the bolt support portion 18 side by side in the short direction of the electrical connection box body 16. In addition, one bolt mounting hole 32a is formed to penetrate with a circular cross section, and the other bolt mounting hole 32b is formed to penetrate with a substantially rectangular cross section.

  A peripheral wall 34 projects from the upper surface 28 of the bolt support portion 18. The peripheral wall 34 extends in the short direction of the electrical junction box body 16 and has a pair of partition walls 36 that partition the adjacent fuse mounting portion 26 and the bolt support portion 18 and extends in parallel with each other in the longitudinal direction of the electrical junction box body 16. Vertical walls 38a and 38b are provided. Thus, the peripheral wall 34 surrounds the two bolt mounting holes 32a and 32b from three directions.

  An insertion slit 40 penetrating in the thickness direction is formed at the base end portion of one vertical wall 38a. At the base end portion of the other vertical wall 38b, a locking recess 42 that opens to the inner surface is formed.

  Further, the vertical walls 38a, 38b extend from the bolt support 18 to the upper surface 46 of the wire support 44 that extends toward one end in the longitudinal direction of the electrical junction box body 16 (the right side in FIG. 2). Yes. The upper surface 46 of the wire support portion 44 is located above the upper surface 28 of the bolt support portion 18. Thereby, a step 48 is formed at the boundary between the bolt support portion 18 and the wire support portion 44.

  Further, a partition wall 50 projects from the upper surface 28 of the bolt support portion 18. The partition wall 50 extends in parallel with the vertical walls 38a and 38b from the inner surface of the partition wall 36, and partitions the two bolt mounting holes 32a and 32b. An insertion slit 52 penetrating in the thickness direction is formed at the base end portion of the partition wall 50.

  Further, the partition wall 50 extends to the upper surface 46 of the wire support portion 44 in the same manner as the vertical walls 38a and 38b. Thereby, on the electric wire support part 44, it extends in the longitudinal direction of the electrical junction box body 16 between the opposing surfaces of the one vertical wall 38a and the partition wall 50 and between the other vertical wall 38b and the opposing surface of the partition wall 50. Electric wire housing portions 54a and 54b are formed.

  Each of the pair of vertical walls 38a and 38b and the partition wall 50 is provided with a stopper projection 56 that protrudes into the electric wire housing portions 54a and 54b at a portion extending on the upper surface 46 of the electric wire support portion 44. Yes. As a result, mounting terminals 112 and 116 provided on an input line 110 and a connection line 114, which will be described later, are engaged with the stopper projection 56 in the longitudinal direction of the electrical connection box body 16. As a result, the input wire 110 and the connection wire 114 are prevented from coming out of the electric wire housing portions 54a and 54b in the longitudinal direction of the electrical junction box body 16.

  A connection plate 58 is placed on the upper surface 28 of the bolt support 18. The connection plate 58 is made of a metal material having high conductivity such as oxygen-free copper, and has a thick rectangular flat plate shape as a whole. The connection plate 58 is formed with two bolt insertion holes 60a, 60b as insertion holes penetrating in the thickness direction side by side in the longitudinal direction. Further, a locking projection 62 that protrudes outward in the longitudinal direction is provided at one longitudinal end of the connection plate 58.

  Such a connection plate 58 is inserted into the insertion slits 40 and 52 from one end in the longitudinal direction where the locking protrusion 62 is provided, and is placed on the upper surface 28 of the bolt support portion 18. In this state, the connection plate 58 is sandwiched between the partition wall 36 and the step 48. Further, the locking projection 62 enters and is engaged with the locking recess 42. Thereby, the movement of the connection plate 58 in the short side direction is restricted. The bolt mounting hole 32a and the bolt insertion hole 60a are located on the same central axis, and the bolt mounting hole 32b and the bolt insertion hole 60b are located on the same central axis.

  A bolt housing hole 64 is formed on the other side in the thickness direction of the bolt support portion 18. The bolt housing hole 64 is formed on the same central axis as the bolt mounting holes 32a and 32b and has a substantially constant rectangular cross section so as to extend straight in the height direction of the electrical junction box body 16, and one end thereof is formed. It is connected to the bolt mounting holes 32a and 32b. Engagement protrusions 66 project from the pair of side surfaces opposed in the longitudinal direction of the electrical junction box body 16 in the inner peripheral surface of the bolt housing hole 64.

  The bolt terminals 20a and 20b attached to the bolt support portion 18 have a structure in which a shaft portion 70 protrudes from a seating surface of a rectangular block-shaped head portion 68. A proximal-side protrusion 72 having a diameter larger than that of the portion 70 is provided.

  Further, a bolt cover 74 made of synthetic resin is attached to the bolt terminals 20a and 20b. The bolt cover 74 has a structure in which a bottom wall 78 is integrally formed at one end of a cylindrical wall 76 having a rectangular cylindrical shape, and has an inverted rectangular box shape with a recess opening downward as a whole. Presents.

  Such a bolt cover 74 is attached to the bolt terminals 20a and 20b. In this state, the head portion 68 is accommodated in the cylindrical wall 76, and the shaft portion 70 projects outside the bolt cover 74 through the insertion hole 80 formed in the bottom wall 78.

  The head 68 comes into contact with the cylindrical wall 76 when it is displaced around the central axis within the cylindrical wall 76. As a result, the displacement of the head 68 around the central axis within the cylindrical wall 76 is limited.

  The head 68 climbs over the locking protrusions 82 that are allowed to be elastically deformed in the direction in which the protruding height from the inner peripheral surface of the cylindrical wall 76 decreases, and the locking protrusions 82 and the bottom wall 78 are separated from each other. It is accommodated in the cylindrical wall 76 in a state located between them. This prevents the head 68 from coming out of the cylindrical wall 76.

  In a state where the head 68 is engaged with the locking projection piece 82, a gap is formed between the head 68 and the bottom wall 78. The bolt terminals 20 a and 20 b can be displaced in the axial direction with respect to the bolt cover 74 by a distance corresponding to the gap. In a state in which the head 68 is in contact with the bottom wall 78, the distal end surface of the base end side protruding portion 72 is positioned above the protruding end surface of the collar portion 84 protruding from the bottom wall 78.

  In such bolt terminals 20a and 20b, the engagement protrusions 86 formed on the outer peripheral surface of the bolt cover 74 are engaged with the engagement protrusions 66 formed on the inner peripheral surface of the bolt receiving hole 64. The bolt 74 is attached to the bolt support 18 in a state where the bolt 74 is prevented from coming out of the bolt receiving hole 64. The engagement state between the engagement protrusion 86 and the engagement protrusion 66 is such that when the bolt terminals 20a and 20b are attached to the bolt support portion 18, the cylindrical wall 76 is elastically deformed inward and the engagement protrusion 86 is engaged. This is realized by getting over the protrusion 66. Note that the engaging protrusion 66 protrudes from the bottom surface of the concave groove formed on the outer peripheral surface of the bolt cover 74.

  The rotation of the bolt cover 74 around the central axis within the bolt receiving hole 64 is restricted by the bolt cover 74 coming into contact with the inner peripheral surface of the bolt receiving hole 64. Thereby, rotation of the bolt terminals 20a and 20b around the central axis with respect to the bolt receiving hole 64 is also restricted.

  In a state where the engagement protrusion 86 and the engagement protrusion 66 are engaged, a gap is formed between the bolt cover 74 and the bolt support portion 18. The bolt cover 74 can be displaced in the axial direction with respect to the bolt housing hole 64 by a distance corresponding to the gap.

  The collar portion 84 of the bolt cover 74 is inserted into the bolt mounting holes 32 a and 32 b of the bolt support portion 18. As a result, the shaft portions 70 of the bolt terminals 20 a and 20 b protrude from the upper surface 28 of the bolt support portion 18.

  The shaft portion 70 of one bolt terminal 20a is inserted into the bolt insertion hole 60a of the connection plate 58. The shaft portion 70 of the other bolt terminal 20 b is inserted into the bolt insertion hole 60 b of the connection plate 58.

  The electric junction box body 16 is assembled with a bus bar 90 as a first branch circuit that distributes power through a plurality of fuses 88 mounted on the fuse mounting portion 26. The bus bar 90 is formed by appropriately bending a rectangular flat copper plate.

  The bus bar 90 is provided with a bus bar terminal portion 92. The bus bar terminal portion 92 has a rectangular flat plate shape, and a bolt insertion hole 94 is formed at the center thereof.

  Such a bus bar 90 is assembled to the electrical junction box main body 16 from below before the bolt terminals 20 a and 20 b are attached to the bolt support portion 18. In this state, the bus bar terminal portion 92 is positioned in the bolt mounting hole 32 b and overlapped with the connection plate 58. The bolt insertion hole 94 is located on the same center axis as the bolt insertion hole 60 b, and the shaft portion 70 is inserted in a state where the other bolt terminal 20 b is attached to the bolt support portion 18.

  On the other hand, the second electrical connection box 14 is provided with a fuse mounting portion (not shown) to which a plurality of fuses 96 are mounted, like the first electrical connection box 12. The second electrical connection box 14 is assembled with a bus bar 98 as a second branch circuit that distributes electric power through a plurality of fuses 96 attached to the fuse attachment portion. And the connection terminal 100 provided in the bus-bar 98 and the 2nd electrical connection box 14 is electrically connected.

  The electrical junction box 10 including the first electrical junction box 12 and the second electrical junction box 14 as described above is mounted on a vehicle 104 in which a battery 102 is mounted in a rear luggage room. The battery 102 is housed in a housing recess provided in a rear luggage room whose opening is closed by a lid member. In the following description, the rear portion of the vehicle 104 refers to the vehicle rear side from the installation location of the front seat 106, and the front portion of the vehicle 104 refers to the vehicle front side from the installation location of the front seat 106.

  The first electric junction box 12 is attached to the wall surface of the rear luggage room of the vehicle 104 via a bracket (not shown) attached to a bracket attachment portion 108 provided on the side surface of the electric junction box body 16. . The second electrical junction box 14 is mounted on a wall surface of an engine room provided at the front portion of the vehicle 104 via a bracket (not shown).

  In the first electrical junction box 12, a mounting terminal 112 that is crimped to one end of an input line 110 connected to the electrode of the battery 102 is mounted on the bolt terminal 20b. Also, a mounting terminal 116 that is crimped to one end of a connection line 114 that connects the first electrical connection box 12 and the second electrical connection box 14 is mounted on the bolt terminal 20a. As is clear from this, the bolt terminal 20b constitutes an input terminal, and the bolt terminal 20a constitutes a connection terminal.

  The mounting terminals 112 and 116 are formed by inserting the shaft portions 70 of the bolt terminals 20a and 20b into the mounting holes formed in the mounting terminals 112 and 116, and then tightening the nuts 118 screwed into the shaft portions 70. The bolt terminals 20a and 20b are attached. Based on the screw feeding action between the nut 118 and the shaft portion 70, the bolt terminals 20 a, 20 b are displaced toward the nut 118, whereby the distal end surface of the proximal end side protruding portion 72 protrudes from the protruding end surface of the collar portion 84. To do. If the nut 118 is further tightened from this state, the bolt cover 74 is also displaced to the nut 118 side. As a result, the mounting terminal 116 and the connection plate 58 are directly tightened between the nut 118 and the base end side protrusion 72 of the bolt terminal 20a, and the mounting terminal 116 and the connection plate 58 are electrically connected. It is tightened firmly in the state. Further, the mounting terminal 112, the connection plate 58, and the bus bar terminal portion 92 are directly clamped between the nut 118 and the base end side protrusion 72 of the bolt terminal 20b, so that the mounting terminal 112, the connection plate 58, and the bus bar terminal are connected. The part 92 is firmly fastened in an electrically connected state. As a result, the input line 110 and the connection line 114 are electrically connected via the connection plate 58, and the input line 110 and the bus bar 90 are electrically connected via the connection plate 58.

  Further, the input line 110 is located in the electric wire housing part 54b in a state of being attached to the bolt terminal 20b, while the connection line 114 is located in the electric wire accommodation part 54a in a state of being attached to the bolt terminal 20a. positioned. Thereby, the input line 110 and the connection line 114 are attached to the bolt terminals 20a and 20b in a state of extending in parallel with the longitudinal direction of the electrical connection box body 16.

  In the second electrical connection box 14, an attachment terminal (not shown) that is crimped to the other end of the connection line 114 is attached to the connection terminal 100. Thereby, the first electrical junction box 12 and the second electrical junction box 14 are electrically connected via the connection line 114.

  In such an electrical connection box 10, the power of the battery 102 is supplied to the first electrical connection box 12 via the input line 110. The electric power supplied to the first electric junction box 12 is divided into a plurality of parts by the bus bar 90 and supplied to the electrical components 120 such as audio, towing, and back door disposed at the rear part of the vehicle 104 via the fuse 88. The

  The power of the battery 102 is supplied to the second electrical connection box 14 through the input line 110, the first electrical connection box 12 (connection plate 58), and the connection line 114. The electric power supplied to the second electrical connection box 14 is branched into a plurality by the bus bar 98 and supplied to the electrical components 122 such as audio, headlights, and horns arranged at the front of the vehicle 104 via the fuse 96. Is done.

  In the electrical junction box 10 as described above, the first electrical junction box 12 that distributes and supplies power to the electrical component 120 disposed at the rear portion of the vehicle 104 and the electrical component 122 that distributes and supplies power to the electrical component 122 disposed at the front portion of the vehicle 104 are distributed. A second electrical junction box 14 was used in combination. Thereby, efficient wiring can be realized.

  Further, it is possible to shorten the length of the electric wire for distributing and feeding the electric component 120 from the first electric connection box 12 and the electric wire for distributing and feeding the electric component 122 from the second electric connection box 14. . As a result, it is possible to reduce the possibility of occurrence of defects such as a short circuit on these electric wires, and it becomes easy to cope with the occurrence of defects and improve the maintainability.

  Further, the input line 110 and the connection line 114 through which a large current from the battery 102 flows can be shortened. As a result, the wiring efficiency of the input line 110 and the connection line 114 can be improved, and the possibility of a short circuit on the input line 110 and the connection line 114 can be reduced.

  Further, the input wires 110 and the connecting wires 114 are respectively attached to the bolt terminals 20 a and 20 b in a state where the input wires 110 and the connecting wires 114 extend in parallel with the longitudinal direction of the electric junction box body 16. As a result, the input line 110 and the connection line 114 are extended so that the mounting terminals 112 and 116 do not interfere with each other with respect to one bolt terminal, for example, as compared with the case where the mounting terminals are shifted by 45 ° or more in the circumferential direction. Direction can be aggregated. Therefore, the mounting space for the mounting terminals 112 and 116 can be made compact, and the overall size of the first electrical junction box 12 can be reduced.

  As mentioned above, although embodiment of this invention was explained in full detail, this invention is not limited by the specific description. For example, a single bolt terminal may be used as the input terminal and the connection terminal in the first electrical junction box.

10: Electric connection box, 12: First electric connection box, 14: Second electric connection box, 20a: Bolt terminal (input terminal), 20b: Bolt terminal (connection terminal), 58: Connection plate, 60a: Bolt Insertion hole (insertion hole), 60b: bolt insertion hole (insertion hole), 90: bus bar (first branch circuit), 98: bus bar (second branch circuit), 100: connection terminal, 102: battery, 104: Vehicle, 110: input line, 114: connection line

Claims (2)

In the electrical junction box attached to the vehicle with the battery in the rear luggage room,
Adopting a first electric connection box arranged at the rear of the vehicle and a second electric connection box arranged at the front of the vehicle, an input terminal to which an input line connected to the electrode of the battery is mounted The first electrical junction box is provided in the first electrical junction box, and the first electrical junction box and the second electrical junction box are connected to each other to supply electric power of the battery via the first electrical junction box. The first electrical connection box and the second electrical connection box are each provided with a connection terminal to which a connection line for feeding power to the electrical connection box is provided, while power is fed from the input terminal in the first electrical connection box A first branch circuit for branching a plurality of powers to be supplied to the outside and supplying power to the outside by branching a plurality of powers fed from the connection terminals in the second electrical connection box A second branch circuit is provided Electrical junction box to be.   In the first electrical connection box, the input terminal and the connection terminal are configured by separate bolt terminals, and a connection plate provided with insertion holes at positions corresponding to the bolt terminals is used. The bolt terminals are inserted into the insertion holes of the connection plate, and the connection plate is fastened and fixed together with the input wires and the connection wires to the bolt terminals. Electrical connection box as described in.

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