JPH11127522A - Fixing structure and fixing method of wire harness in electrical connection box - Google Patents

Abstract

PROBLEM TO BE SOLVED: To fix wire harness into a connection box main unit, and prevent interference between a bus bar. SOLUTION: In a fixing structure formed by arranging an electrical component 10, a wire harness 3 and a bus bar 4 in a bottom wall surface 2a of a connection box main unit 2, and covering a cover in an upper part of the connection box main unit, a bus bar positioned in the upward of the harness is secured to the electrical component, the harness is prevented from floating. A belt part 4a of the bus bar is screw mounted in the electrical component or a receiving part 10' insertion mounting the electrical component. In the screw mounted belt part of the bus bar, an end part 3' of the harness is connected. In a fixing method formed by arranging the electrical component, harness, and the bus bar insertion mounting the electrical component in the bottom wall surface and covering the cover in an upper part of the connection box main unit, the harness is arranged in the bottom wall surface, the electrical component is assembled in the bottom wall surface, also the harness is connected to the electrical component or a receiving component insertion mounting the electrical component, the bus bar positioned upward of the harness is secured to the receiving component.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a structure and a method for fixing a wire harness in an electric connection box used in an electric vehicle.

[0002]

2. Description of the Related Art FIG. 5 shows a conventional example. In FIG. 5, when the wire harness 52 is fixed in the connection box main body 51 of the electric connection box 50, the terminal portion 52 ′ of the wire harness 52 is connected to the connector 5 provided on the wire harness 52.
3 is fixed by fitting with a mating connector (not shown). The trunk 52a of the wire harness 52 and the branch 52b between the trunk 52a and the terminal 52 'are fixed by clips 54 or rubber or resin bands which are fixed in advance to desired positions. Fixed.

However, since it is necessary to separately prepare the locking tool 54 in order to fix the wire harness 52 to the connection box main body 51, there is a disadvantage that the number of parts is increased and the manufacturing cost is increased. Further, there is another problem that it takes time to determine the wiring route of the wire harness 52 and the position of the locking member 54, respectively. In the case where the bus bar 55 and the wire harness 52 are mixed in the connection box main body 51, the wire harness 52 is arranged above the bus bar 55 after the bus bar 55 is arranged due to the arrangement route of the wire harness 52. ing.

[0006] However, as shown in FIG. 6, the wiring harness 52 and the edge 5
There is a risk of interference with 5a, and in order to prevent this, measures such as providing a separate protective member (not shown) were necessary. In particular, in the electric junction box 50 used for the electric vehicle, a strong current flows through the bus bar 55, and the wire harness 52
Therefore, interference between the bus bar 55 and the wire harness 52 was very dangerous.

[0005]

SUMMARY OF THE INVENTION In view of the above, the present invention provides an electric connection box for easily and securely fixing a wire harness in a connection box body and preventing interference between the wire harness and a bus bar. It is an object to provide a wire harness fixing structure and a fixing method in the inside.

[0006]

In order to achieve the above-mentioned object, the present invention is to dispose an electric component such as a relay and a fuse, a wire harness, and a bus bar on a bottom wall surface of a connection box body, and connect the cover to the connection box. In the fixing structure of the wire harness over the upper part of the box body, the bus bar is fixed to the electric component so as to be located above the wire harness, and a wire in the electric connection box for preventing the wire harness from floating. It is based on a harness fixing structure (claim 1). A wire harness fixing structure in an electric connection box in which the bus bar is screwed to the electric component is adopted (claim 2). A wire harness fixing structure in the electric connection box is used in which the electric component is inserted into a housing portion arranged on the bottom surface of the connection box main body, and the bus bar band is screwed into the housing portion. ). The wire harness fixing structure in the electric connection box in which the terminal portion of the wire harness is connected to the band portion of the bus bar screwed is also effective (claim 4).
Electrical components such as relays and fuses on the bottom wall of the junction box body,
In a method for fixing a wire harness in which a wire harness and a bus bar are arranged and a cover is placed on an upper portion of the connection box body, the wire harness is routed on a bottom wall surface of the connection box body, and the electric component is placed on the bottom surface. A wire harness fixing method in an electric connection box, wherein the bus bar is fixed to the electric component so that the wire harness is connected to the electric component while being attached to a wall surface, and the bus bar is fixed to the electric component so as to be located above the wire harness. (Claim 5). A method of fixing a wire harness in an electric connection box, wherein the electric component is inserted into a housing portion arranged on a bottom wall surface of the connection box body, and a band portion of the bus bar is screwed into the housing portion (claim) Item 6).

[0007]

Embodiments of the present invention will be described below with reference to the drawings. 1 to 4 show an embodiment of a wire harness fixing structure in an electric junction box according to the present invention. 1 and 2, the fixing structure of the wire harness is such that an electric component 10 for inserting an electric component (not shown) such as a relay or a fuse is connected to the connection box main body 2.
A plurality of busbars 4 attached to a plurality of electric components 10 by connecting a plurality of terminal parts 3 ′ of the wire harness 3 arranged in the connection box body 2 to the plurality of electric components 10.
Is screwed.

[0008] The electrical component 1 assembled in the junction box body 2
0 is inserted through the opening of the connection box main body 2. A fitting hole 5 is formed in the side wall 2 b of the connection box body 2. The upper part of the connection box main body 2 is covered with a cover 11 to form the electric connection box 1.

The wire harness 3 includes one trunk 3a and a plurality of branches 3b branched from the trunk 3a. Executive 3
The grommet 6 inserted into the hole a is fitted into the fitting hole 5.
The connector 7, the electric component 10, or the bus bar 4 is connected to the terminal 3 'of the wire harness 3, respectively. In order to connect the terminal portion 3 ′ to the bus bar 4, for example, a bolt 12 or the like screwed to the band portion 4 a of the bus bar 4 is connected via a round terminal 13. In the present embodiment, the round terminal 13 is arranged above the band 4 a of the bus bar 4, but it is preferable that the round terminal 13 be located between the band 4 a of the bus bar 4 and the electric component 10. It is the branch 3b of the wire harness 3.
And the terminal 3 ′ is located below the bus bar 4.

Also, instead of directly fixing the bus bar 4 to the electric component 10, a housing 10 'into which the electric component 10 is inserted.
May be provided on the bottom wall surface 2a of the connection box main body 2, and the bus bar 4 may be screwed into the housing portion 10 '. By screwing the bus bar 4 into the housing 10 ', the electric component 1 is prepared just in case.
It is possible to avoid an electrical short due to the contact between the bus bar 4 and the bus bar 4.

The bus bar 4 is screwed to the electric component 10 with a bolt 12 or the like, and the bus bar 4 is connected to the wire harness 3.
Is arranged above. That is, the cover 11 is attached to the connection box body 2.
When the bus bar 4 is put on the wire harness 3 and the cover 1
1 Therefore, the lifting of the wire harness 3 from the connection box main body 2 is prevented by the bus bar 4.

Thus, a running automobile (not shown)
The wiring harness 3 does not hit the cover 11 due to the vibration. Therefore, no noise is generated from the electric connection box 1 and the inside of the vehicle is quiet. Wire harness 3 is busbar 4
, The wire harness 3 does not drop by its own weight and interfere with the bus bar 4 as compared with the related art. Therefore, the bus bar 4 located above the wire harness 3 plays a role of a simple holding function for the wire harness 3.

Next, a wire harness 3 is installed in the connection box body 2.
The method for fixing the position is described. As shown in FIG. 3, the grommet 6 inserted through the wire harness 3 is fitted into the fitting hole 5 of the connection box main body 2. The wire harness 3 is spread on the bottom wall surface 2 a of the connection box body 2, and the trunk 3 a and the branch 3 b of the wire harness 3 are arranged on a desired wiring route without being locked to the connection box body 2. However, it is conceivable that the wire harness 3 interferes with the electric component 10, but in that case, it is necessary to fix the electric component 10 in advance as necessary.

As shown in FIG. 4, a plurality of electric components 10 are mounted on the bottom wall 2a. Some of the plurality of branches 3 b of the wire harness 3 are connected to the electric component 10.
As shown in FIGS. 1 and 2, the bus bar 4 is arranged on the electric component 10 so as to be located above the wire harness 3. The band 4a of the bus bar 4 and the electric component 10 are
Screw with 2 etc. Thereby, the wire harness 3 is fixed in the connection box main body 2.

After the wire harness 3 is fixed in the connection box main body 2, the remaining one of the plurality of branches 3b is directly attached to the band 4a of the bus bar 4 via the round terminal 13 or the like. Then, the electrical connection box 1 is formed by covering the connection box body 2 with the cover 11. Since the wiring harness 3 is first routed in the connection box body 2, there is no restriction when the wire harness 3 is routed in the connection box body 2. As a result, the wiring layout of the wire harness 3 can be made more freely than before, and the degree of freedom in designing is improved.

Since no separate member or the like is used as compared with the related art, it is not necessary to fix the wire harness 3. In addition, since the wire harness 3 can be easily and reliably fixed in the junction box main body 2, the structure of the junction box main body 2 can be simplified, thereby reducing the manufacturing cost of the electric junction box 1. Can also.

[0017]

As described above, according to the first aspect, the bus bar is fixed to the electric component disposed on the bottom wall surface of the connection box body so as to be located above the wire harness.
A wire harness disposed on the bottom wall is located below the bus bar. Therefore, the vibrations while the vehicle is running cause the wire harness in the electric junction box to hit the bus bar even if it is going to float. Therefore, the lifting of the wire harness is prevented. Further, by fixing the bus bar to the electric component, the lifting of the wire harness is prevented, so that the wire harness does not interfere with the bus bar. Therefore, the wire harness is not damaged, and no electrical short circuit occurs due to the contact between the bus bar through which the strong current flows and the wire harness through which the weak current flows.

According to the second aspect, since the band portion of the bus bar is screwed to the electric component, it takes less time and effort to fix the wire harness than in the related art. Thus, the work of screwing the bus bar and the electric component is easily and reliably performed, and the bus bar does not shift after screwing. Further, as compared with the related art, since the wire harness can be fixed to the connection box main body without using a locking tool or the like, the number of components can be reduced. According to the third aspect, the electric component is inserted into the housing portion arranged on the bottom wall surface of the connection box main body, and the band portion of the bus bar is screwed into the housing portion, so that an electric short circuit between the electric component and the bus bar is prevented. Can be prevented.

According to the fourth aspect, the terminal portion of the wire harness is connected to the band portion of the bus bar that is screwed, so that the connection between the terminal portion and the bus bar can be performed more easily than in the related art. Therefore, according to the first to fourth aspects, it is possible to simplify the structure of the connection box main body constituting the electric connection box, and to reduce the cost for manufacturing the electric connection box by reducing the number of parts. it can.

According to the fifth aspect, after the wiring harness is routed on the bottom wall surface of the connection box main body, the wire harness is fixed by the bus bar. Disappears. This allows
The degree of freedom of layout is improved at the time of routing. According to the sixth aspect, by inserting the electric component into the housing portion arranged on the bottom wall surface of the connection box main body, the housing portion and the band portion of the bus bar can be screwed. Thereby, compared with the case where the bus bar and the electric component are directly fixed, the electric component is not damaged after the band portion of the bus bar is screwed into the housing portion. Therefore, the operation of forming the electric junction box can be performed safely.

[Brief description of the drawings]

FIG. 1 is a top view showing one embodiment of a wire harness fixing structure in an electric junction box according to the present invention.

FIG. 2 is a sectional view taken along line AA of FIG.

FIG. 3 is a diagram showing a state in which a wire harness is routed on a bottom wall surface of the connection box main body of FIG. 1;

FIG. 4 is a diagram showing a state where the housing is assembled to FIG. 3 and the branch of the wire harness and the housing are connected.

FIG. 5 is a top view of a conventional connection box main body.

FIG. 6 is a diagram showing a state in which the wire harness and the edge of the bus bar interfere with each other in FIG. 5;

[Explanation of symbols]

 2 Connection Box Main Body 2a Bottom Wall 3 'Terminal 3 Wire Harness 4 Bus Bar 4a Band 10 Electrical Parts 10' Housing 11 Cover

Claims (6)

[Claims] An electrical component such as a relay or a fuse, a wire harness, and a bus bar are disposed on a bottom wall surface of a connection box main body, and a cover is placed on an upper portion of the connection box main body. A structure for fixing a wire harness in an electric junction box, wherein the bus bar is fixed to the electric component so as to be located above the wire harness, and the wiring harness is prevented from floating. 2. The wire harness fixing structure in an electric connection box according to claim 1, wherein the band portion of the bus bar is screwed to the electric component. 3. The device according to claim 1, wherein the electric component is inserted into a receiving portion disposed on a bottom surface of the connection box main body, and a band portion of the bus bar is screwed into the receiving portion. Wire harness fixing structure in the electrical junction box. 4. The wire harness fixing structure in an electric connection box according to claim 2, wherein a terminal portion of the wire harness is connected to a band portion of the bus bar screwed. 5. A method for fixing a wire harness in which an electric component such as a relay or a fuse, a wire harness, and a bus bar are disposed on a bottom wall surface of the connection box body, and a cover is placed on an upper portion of the connection box body. The busbar is arranged such that the wire harness is routed on a bottom wall surface of the box body, the electric component is assembled to the bottom wall surface, the wire harness is connected to the electric component, and the busbar is located above the wire harness. A method for fixing a wire harness in an electric connection box for fixing the wire harness to the electric component. 6. The busbar according to claim 5, wherein the electric component is inserted into a housing portion arranged on a bottom wall surface of the connection box main body, and a band portion of the bus bar is screwed into the housing portion. How to fix the wire harness in the electrical junction box.