JPH11164440A - Harness assembling structure of electrical connection box - Google Patents

Abstract

PROBLEM TO BE SOLVED: To improve the quality of assembling/removing the respective harnesses for strong and weak electric power systems into/from the base plate of an electrical connection box. SOLUTION: A harness 1 for weak electric power systems is assembled into a base plate 2 of an electrical connection box 50, and a plurality of brackets 4, 5 are stood on the base plate 2 to support a harness 3 for strong electric power systems. Providing at least on the harness 3 for strong electric power system clips 42 for fastening, the clips 42 are fastened to the brackets 4, 5. Also providing on the base plate 2 a purality of columns, each of which comprises one portion of a plurality of auxiliary machines 12-18, the brackets 4, 5 are provided the auxiliary machines 16-18 in the column with low height to provide the harness 3 for strong electric power systems in the space above the auxiliary machines 16-18 with low height. Furthermore, providing on the extension of the line for connecting thereby the brackets 4, 5 a connection portion 36 for the terminal of the harness 3 for strong electric power systems, the harness 3 is attached to the brackets 4, 5 straightforward, extending from the brackets 4, 5 to the terminal 36.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a harness mounting structure for an electric connection box for an electric vehicle, which improves the assembling / removing properties of a high-power harness and a low-power harness in an electric connection box for an electric vehicle. It is.

[0002]

2. Description of the Related Art With the development of electric vehicles in recent years, various wiring harnesses have been wired inside an electric connection box housed in a hood. FIG. 4-
FIG. 5 shows an example of a conventional harness assembling structure of an electric connection box. In the electric connection box 80, various auxiliary devices 12 to 18 such as relays are provided. The system harness 82 is provided in a mixed manner.

On the base plate 83 made of conductive metal, the motor relay 12 on the N (-) side of
(+) Side motor relay 15 and EVOC
An EL sensor 13 and a current sensor 14 are arranged substantially in a line, and a voltage sensor 16 and an N-side motor sub-relay 17 and a P-side motor sub-relay 18 of 30A are arranged beside them.

A bus bar 54 is connected to the motor relay 15 on the P side.
The terminal 66a is led out of the bus bar 54 via the sensors 14 and 13. The outlet hole 84 is formed in the insulating synthetic resin wall 51. The short bus bar 57 and the high-power harness 81 are connected to the motor relay 12 on the N side.
Is led out, and the high-power harness 81 is connected to the auxiliary machine 12,
Motor sub-relay 1
Wired next to 7 and 18.

The low-power harness 82 is wired so as to overlap below the high-power harness 81, and its branch lines 84 to
Reference numeral 90 is connected to the N-side motor relay 12, the N-side and P-side motor sub-relays 17, 18, and the like. Each auxiliary machine 12
18 and the harnesses 81 and 82 are made of a conductive metal cover 91.
To prevent noise from leaking from inside the electric connection box 80 to the outside.

[0006]

However, in the above-described conventional structure, since the weak power harness 82 and the strong power harness 81 are provided on the same layer at the bottom side of the electric connection box 80, the thickness is large. When the high-power harness 81 is overlaid on the weak-power harness 82 having many branch lines, or overlaid on the branch lines 84 to 90 beside the weak-power harness 82, the electric connection box 80 When it is necessary to repair the weak power system parts (auxiliary equipment) and the weak power system harness 82 after mounting on the vehicle, the weak power system harness 82 cannot be removed unless the high power system harness 81 is removed. In addition to the trouble, there is a concern that a secondary failure such as breakage or erroneous connection may occur due to removal of the high-power harness 81 having no abnormality. Conversely, when the weak power system harness 82 is wired on the high power system harness 81, there arises a problem that the maintainability of the high power system harness 81 deteriorates. In addition, since the high-power harness 81 has high rigidity, it is difficult to bend, and there is a problem in that wiring work between the auxiliary devices 12, 16, and 17 is very troublesome. Further, since the low power harness 82 and the high power harness 81 are mixed, the high power harness 81
However, there is a concern that, if the power supply is forgotten to be turned off in spite of being identified with a conspicuous electric wire color such as orange, an electric shock accident may occur during the work. In the electric connection box 80, each of the harnesses 81, 82
And open parts of the auxiliary equipment are likely to occur.
Dead space 9 due to different heights of 2-18
Therefore, it is necessary to reduce the size of the electrical junction box 80 by eliminating useless space.

In view of the above, the present invention improves the workability of assembling and detaching a weak power system harness and a high power system harness, and improves safety against electric shock during work by a high power system harness. An object of the present invention is to provide a harness assembling structure of an electric connection box that can achieve a compact electric connection box itself by eliminating dead space.

[0008]

In order to achieve the above object, according to the present invention, a plurality of brackets are erected on a base plate of an electric junction box, and a weak power system harness is wired on the base plate. A harness assembling structure for an electric connection box, wherein a high-power harness is supported by the plurality of brackets (claim 1). It is also effective that a clip for fixing is provided on at least the high-power harness, and the clip is locked to the bracket (claim 2). Also, a plurality of accessories are arranged in a plurality of rows on the base plate, the plurality of brackets are arranged in a row of low-height accessories, and the high-power harness is located above the low-height accessories. It is also effective to arrange them in the space (claim 3). It is also effective that a connecting portion for the terminal of the high-power harness is arranged on an extension line connecting the plurality of brackets, and the high-power harness is wired straight from the bracket to the connecting portion ( Claim 4).

[0009]

Embodiments of the present invention will be described below in detail with reference to the drawings. 1 to 3 show an embodiment of a harness assembling structure of an electric junction box according to the present invention. The same members as those in the related art will be described using the same reference numerals.

As shown in FIG. 1, a low power harness 1 is wired on a base plate 2, and a high power harness (battery cable) 3 is mounted on two metal brackets 4, 5 erected on the base plate 2. Supported by

The base plate 2 is provided with holes 6 for fixing the low power harness 1 at appropriate positions. A clip 7 is attached to the low power harness 1 corresponding to the position of each hole 6.
Is installed. The clip 7 is formed of a synthetic resin,
A pair of elastic harness grips 8, 8, an insertion guide 9 at the tip of each grip 8, a substrate 10 to which the grips 8 are fixed, and a locking portion 11 suspended from the substrate 10. It is composed of The locking portion 11 has a pair of flexible claws 11b on the shaft portion 11a.
Is formed. Note that the shape of the clip 7 in FIG. 1 is an example in this explanatory diagram.

From the weak power system harness 1, each of the auxiliary devices 12 to
A plurality of thin branch lines 19-26 for 18 are derived,
A round plate terminal 27 and a connector 28 are connected to the end of each branch line 19 to 26 (illustration of some branch lines other than 19 to 26 is omitted in FIGS. 1 and 3).

The brackets 4 and 5 are arranged in the row of the auxiliary equipments 16 to 18 which are shorter than the auxiliary equipments 12 to 18 arranged in two rows. As shown in FIG.
Are fixed to one end and the center of the base plate 2 by welding or the like. A pair of support plates 29, a fixed plate 30 coupled to a lower end of the support plate 29, and an upper end of each support plate 29 are fixed. And a top plate 31 connected thereto.
Two.

On the extension of the line connecting the brackets 4 and 5, a four-legged support base 33 is fixed to the base plate 2 with bolts, and a pair of front and rear fuse holders 34 and
35 is fixed, and screw terminals 36 and 37 are provided upright on the respective fuse holders 34 and 35. In addition to the clip fixing holes 6 in the base plate 2, bolt holes 38 for fixing the auxiliary devices 12 to 18, the support base 33, and the like, bolt holes 39 for fixing the base plate 2 to the vehicle, a cover, and the like. A bolt hole 39 ′ for fixing 41 (FIG. 3) to the base plate 2 is provided.

In FIG. 1, a clip 4 similar to that of the weak power harness 1 is provided at an intermediate portion of the high power harness 3.
2 are mounted at positions corresponding to the fixing holes 32 of the brackets 4 and 5, and a plate-like terminal 43 is crimped to the tip (terminal) of the high-power harness 3, and one of the fuse holders is attached to the plate-like terminal 43. Insertion holes 44 corresponding to the 34 screw terminals (connection portions) 36 are provided. The clip 42 includes a grip portion 45, an insertion guide portion 46, a substrate portion 47, and a locking portion 48, and each locking portion 48 can be engaged with each fixing hole 32. Each of the harnesses 1 and 3 is sent to a step of assembling the electric connection box 50 (FIG. 3) with the clips 7 and 42 attached. The heights of the brackets 4 and 5 and the fuse holder 34 are set to such a height that the high-power harness 3 can be fixed in a straightened state.

A voltage sensor (auxiliary device) 16 having a lower height than the brackets 4, 5 is disposed between the pair of brackets 4, 5. An N (-)-side sub-motor relay (accessory) 17 and a P (+)-side sub-motor relay (accessory) 18 having a low height of 30A are arranged in parallel.

A P-side motor relay 15 of 150 A is arranged beside the support base 33, and a current sensor (auxiliary unit) 14 and an EVOC / EL sensor (auxiliary unit) are arranged in a row on the motor relay 15 side.
13, a bus bar lead-out portion (wall portion) 51 and an N-side motor relay (auxiliary device) 12 are arranged. One end of a long bus bar 54 is connected to one screw terminal 52 of the P-side motor relay (auxiliary machine) 15, and the bus bar 54 is connected to each sensor 14,
13, the other end extends to the vicinity of the lead-out portion 51. A short bus bar 57 is connected to one screw terminal 55 of the N-side motor relay 12, and a terminal of the bus bar 57 projects outside from the lead-out portion 51.

As shown in FIG. 3, the high-power harness 3 is fixed on the brackets 4 and 5 with clips 42 and 42, and the terminal 43 on the tip side is connected to one fuse holder 34 together with one end 59 of a fuse 58. Tightened and fixed with nuts. A short bus bar 61 is fastened to the other fuse holder 35 together with the other end 60 of the fuse 58. The high-power harness 3 is arranged in a space above the short auxiliary devices 16 to 18 (formerly a dead space), so that the space can be effectively used and the cables are arranged in a straight line. Attachment work is easier.

Further, in the prior art (FIG. 4), since the thick high-power harness is arranged near the side end of the base plate or is arranged beside the low-power harness, the width of the base plate needs to be increased. However, the harness 3 was
By arranging in the upper space of ~ 18, the width of the base plate 2 can be reduced correspondingly, and the electric junction box 50 itself can be made compact.

The low power harness 1 is fixed to the base plate 2 by clips 7,7. In this example, the weak power system harness 1
Is located near the side edge of the base plate 2, but it can be arranged at the center of the base plate 2, that is, between two rows of accessories (16 to 18 and 12 to 15). By arranging the high-power harness 3 and the low-power harness 1 separately, there is no danger of touching the high-power harness 3 when repairing the low-power harness 1 and the distinctive color of the high-power harness 3 (Orange, etc.) works effectively, and the discrimination at the time of work, that is, safety is enhanced.

The branch line 26 of the low-power harness 1 is connected to the + terminal 62 of the P-side motor sub-relay 18, and the branch line 25 is connected to the motor sub-relay 18 via the connector 28.
The branch line 24 is connected to the negative terminal 64 of the motor sub-relay 18, and the integral branch line 20 following the branch line 24 is tightened and connected to one end of the long bus bar 54 with a bolt 65. Have been. The bus bar 54 is connected to a short bus bar 66, and a terminal 66 a of the bus bar 66 projects outside from the lead-out portion 51.

The branch line 23 of the low power system harness 1 is connected to the + terminal 67 of the N-side motor sub-relay 17, and the branch line 19 following the branch line 23 is connected to one terminal 55 of the N-side motor relay 12. The branch line 22 is connected to the negative terminal 68 of the motor sub-relay 17, and the branch line 21 is connected to the signal line 69 of the motor sub-relay 17 via the connector 28.
It is connected to the.

One terminal of the voltage sensor 16 is connected to the terminal 55 of the motor relay 12 on the N side by a wire 70,
The other terminal is connected to a branch line 71 of the low-power harness 1, and a branch line 72 following the branch line 71 is connected to the other terminal 53 of the P-side motor relay 15. Power harnesses (battery cables) 74 and 75 are connected to the other terminals 73 and 53 of the motor relays 12 and 15, respectively. Each of the high-power harnesses 3, 74, 75 has a cover 41.
From the opening before and after. 76 is a ground wire.

[0024]

As described above, according to the first aspect of the present invention, since the low power harness and the high power harness are arranged separately, each harness can be independently assembled and detached. The workability of assembling / removing each harness is improved, maintenance is facilitated, safety during work is enhanced, and the effect of the identification color of the high-power harness for calling attention is further exhibited. Is done. According to the second aspect of the present invention, the assembly of the high-power harness to the bracket is performed by one-touch operation with the clip, so that the assembling workability is improved. According to the third aspect of the present invention, the empty space in the electric connection box is effectively used as a harness insertion space, and the electric connection box itself is more compact than when the high-power harness is arranged elsewhere. Is possible. According to the fourth aspect of the present invention, a thick and hard-to-bend strong power system harness can be assembled straight.
The assembly workability is improved.

[Brief description of the drawings]

FIG. 1 is an exploded perspective view showing one embodiment of a harness assembling structure of an electric junction box according to the present invention.

FIG. 2 is a perspective view showing a state in which a bracket for a high-power harness is fixed to a base plate.

FIG. 3 is a perspective view showing a state where each harness is assembled.

FIG. 4 is a perspective view showing a conventional example.

FIG. 5 is a sectional view taken along line AA of FIG. 4;

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Low-power harness 2 Base plate 3 High-power harness 4,5 Bracket 7,42 Clip 12,15 Relay (auxiliary equipment) 13,14,16 Sensor (auxiliary equipment) 17,18 Sub-relay (auxiliary equipment) 36 Screw terminal (Connection part) 50 Electrical connection box

Claims (4)

[Claims] 1. A plurality of brackets are erected on a base plate of an electric junction box, a low-power harness is wired to the base plate, and a high-power harness is supported by the plurality of brackets. Harness assembly structure of electrical junction box. 2. The harness assembling structure for an electric junction box according to claim 1, wherein a clip for fixing is provided at least on the high-power harness, and the clip is locked to the bracket. 3. A plurality of auxiliary machines are arranged in a plurality of rows on the base plate, and the plurality of brackets are arranged in a row of low-height auxiliary machines. 2. The device according to claim 1, wherein the device is arranged in a space above the machine.
Or the harness assembling structure of the electric connection box according to 2. 4. A connecting portion for connecting a terminal of the high-power harness to an extension line connecting the plurality of brackets, and the high-power harness is wired straight from the bracket to the connecting portion. The harness assembling structure for an electric connection box according to claim 3.