JP3307545B2 - Ground structure of electrical junction box - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a ground structure for an electric connection box.

[0002]

2. Description of the Prior Art FIGS. 5 and 6 show a ground structure of a conventional electric junction box. The ground structure of the electric connection box is such that the earth bus bar 2 drawn out of the electric connection box body 1 is
The configuration is such that it extends along a bracket 4 protruding from a case 3 constituting the electric connection box main body 1.

[0003] As shown in FIG. 6, the ground structure of the electric connection box is such that a bolt 5 is passed through a hole provided in the earth bus bar 2 and a hole provided in the bracket 4 so that the ground bus bar 2
And the bracket 4 are fixed to the vehicle body 6.

In FIG. 5, reference numeral 8 denotes a bus bar disposed inside the electric junction box main body 1, and 9 denotes a bus bar arranged inside the electric junction box main body 1.
A mating connector (not shown) is fitted to the housing portion 9 of the housing portion protruding from the case 3.

[0005]

However, the conventional earthing structure of the electric junction box has a problem that the earth bus bar 2 drawn out from the inside of the electric junction box main body 1 is easily corroded. Investigation of the cause revealed that there was a portion where the earth bus bar did not strongly contact the vehicle body, and in this case, it was clarified that the portion not strongly contacting the vehicle body was easily corroded. That is, since the earth bus bar is generally made of copper and the vehicle body is made of iron, if the earth bus bar is not in strong contact with the vehicle body, if water or the like accumulates between the two, the earth bus bar will be corroded due to corrosion. Things.

[0006] The earth structure of the conventional electric junction box is as follows.
Since the structure is such that the bolt 5 is passed through the hole provided in the earth bus bar 2 and the hole provided in the bracket 4 to fix the earth bus bar 2 and the bracket 4 to the vehicle body 6, when the vehicle body 6 vibrates, the vibration is directly generated. Transmitted to the electrical junction box body 1,
There are problems such as adversely affecting the electrical connection with a mating connector (not shown) connected to the electric junction box body 1.

[0007]

SUMMARY OF THE INVENTION The present invention provides an earthing structure for an electric connection box which solves the above-mentioned problems, and comprises a ground bus bar drawn out from the inside of the electric connection box main body. In a grounding structure of an electric connection box formed along a bracket protruding from a case constituting a main body, a surface portion of the ground bus bar that is not in contact with a vehicle body is covered and a buffer member is attached by penetrating the ground bus bar and the bracket. The earth bus bar and the bracket are fixed to the vehicle body by passing bolts through the cushioning member.

When the surface portion of the earth bus bar that is not in contact with the vehicle body is configured to be covered, the ground bus bar does not contact the vehicle body in the covered portion. Therefore, corrosion of the earth bus bar at this position can be effectively prevented.

Further, when the cushioning member is attached by penetrating the earth bus bar and the bracket, and the earth bus bar and the bracket are fixed to the vehicle body through bolts, the vibration on the vehicle body side can be absorbed by the cushioning member. It is possible to prevent the vibration on the side from being directly transmitted to the electric connection box main body.

[0010]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below in detail with reference to FIGS. FIG. 1 is an exploded perspective view of an earth structure of an electric junction box according to the present invention, and FIG. 2 is an exploded perspective view in which main parts of FIG. 1 are enlarged. As shown in FIGS. 1 and 2,
The earthing structure of the electric connection box according to the present invention has a structure in which a ground bus bar 2 drawn out of the electric connection box main body 1 is provided with a bracket 4 projecting from a case 3 constituting the electric connection box main body 1.
Is similar to the conventional configuration, but is characterized in that the surface portion of the earth bus bar 2 that is not in contact with the vehicle body is covered and the buffer member 12 is attached by penetrating the earth bus bar 2 and the bracket 4.

That is, the earth bus bar 2 has a longitudinally middle portion bent in a flat mountain shape. The bracket 4 projects from the upper case 3 and the lower case 3, respectively. The bracket 4 has a groove 10 for accommodating the ground bus bar 2 bent in a flat mountain shape. A U-shaped groove 13 through which a cylindrical cushioning member 12 penetrates is formed in a portion of the ground bus bar 2 bent in a flat mountain shape and a portion of the case 3 corresponding to the portion.

The cylindrical cushioning member 12 is made of rubber, and has large-diameter portions 12A at both ends. The thickness of the large diameter portion 12A is slightly larger than the thickness of the earth bus bar 2. The thickness of the intermediate portion 12B sandwiched between the large-diameter portions 12A is substantially equal to the thickness of the bracket 4. Further, a bolt insertion hole 12C is formed at the center.

In order to assemble the earth structure of the electric junction box having the above structure, the U-shaped groove 13 of the earth bus bar 2 is required.
The bracket 4 may be attached from above and below the earth bus bar 2 with the cylindrical cushioning member 12 attached. At this time, the ground bus bar 2 bent in a flat mountain shape is stored in the groove 10 of the bracket 4. Thus, by storing the ground bus bar 2 bent in a flat mountain shape in the groove 10 of the bracket 4, the surface portion of the ground bus bar 2 that does not contact the vehicle body can be covered and hidden.

As described above, when the earth bus bar 2, the cushioning member 12, and the bracket 4 are combined,
As shown in FIG. 3, the distal end surface of the large diameter portion 12 </ b> A of the cushioning member 12 projects from the surface of the bracket 4 and the surface of the earth bus bar 2.

As shown in FIG. 4, the earth structure of the electric connection box is attached to the vehicle body 6 by inserting the bolt 5 into the bolt insertion hole 12C of the cushioning member 12. The large-diameter portion 12A of the cushioning member 12 projecting from the surface of the second busbar 2 is compressed, and accordingly, the surface of the earth bus bar 2 and the vehicle body 6 come into contact. The earth bus bar 2 in the portion accommodated in the groove 10 of the bracket 4 does not contact the vehicle body 6.

As described above, when the earth bus bar 2 and the bracket 4 are fixed to the vehicle body 6 by passing the bolts 5 through the buffer member 12 attached with the earth bus bar 2 and the bracket 4 penetrated, the vibration on the vehicle body side is absorbed by the buffer member 12. Therefore, it is possible to prevent the vibration on the vehicle body side from being directly transmitted to the electric connection box main body.

In the above embodiment, as a means for covering the surface portion of the earth bus bar 2 which does not contact the vehicle body 6, the earth bus bar 2 is bent into a flat mountain shape, and the bracket 10 is provided with a groove 10 for accommodating the bent portion. However, for example, when there is unevenness on the vehicle body side, the ground bus bar 2 and the bracket 4 may be formed flat, and an insulating tape may be wound around a surface portion of the ground bus bar 2 that does not contact the vehicle body. . Further, the shape of the cushioning member may be elliptical or square. Further, the brackets may not be protruded from the upper case 3 and the lower case 3, but may be protruded only from one case.

[0018]

As described above, the earthing structure of the electric connection box according to the present invention is such that the earth busbar drawn out from the inside of the electric connection box main body is aligned with the bracket projecting from the case constituting the electric connection box main body. In the grounding structure of the electric junction box, a surface portion of the ground bus bar that is not in contact with the vehicle body is covered, and a buffer member is attached by penetrating the ground bus bar and the bracket. Is fixed to the vehicle body, so that corrosion of the earth bus bar can be effectively prevented and vibration of the vehicle body can be prevented from being directly transmitted to the electric connection box main body.

[Brief description of the drawings]

FIG. 1 is an exploded perspective view of a ground structure of an electric junction box according to the present invention.

FIG. 2 is an exploded perspective view in which main parts of FIG. 1 are enlarged.

FIG. 3 is an explanatory view of a state where an earth structure of the electric junction box according to the present invention is assembled.

FIG. 4 is an explanatory view of a state in which the earth structure of the electric connection box according to the present invention is assembled to a vehicle body. Plan view.

FIG. 5 is an exploded perspective view of a conventional earth structure of an electric junction box.

FIG. 6 is an enlarged cross-sectional view showing a state in which a conventional earth structure of an electric junction box is assembled.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Electric connection box main body 2 Earth bus bar 3 Case 4 Bracket 6 Body 10 Groove 12 Buffer member

Claims (1)

(57) [Claims] 1. An earthing structure for an electric connection box, wherein an earth bus bar drawn out from the inside of the electric connection box main body is arranged along a bracket protruding from a case constituting the electric connection box main body. A grounding structure for an electric connection box, wherein a buffer member is attached by covering a surface portion not to be brought into contact with and penetrating an earth bus bar and a bracket, and the earth bus bar and the bracket are fixed to a vehicle body by passing a bolt through the buffer member.