JP3738938B2 - Electrical junction box mounting bracket - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a mounting bracket structure for an electrical junction box in which electrical components mounted on an automobile or the like are collectively and collectively mounted.
[0002]
[Prior art]
2. Description of the Related Art Conventionally, various types of mounting bracket structures for an electrical junction box that houses fuses, relays, and the like used in electrical circuits of electrical systems such as automobiles are known. In the under cover 52 of the electrical junction box 51 shown in FIG. 3, a first storage space 55 for mounting and storing the fuse 53 and the relay 54 is formed. A second storage space 56 for storage is formed. A mounting bracket 57 is provided on a part of the outer walls 63 and 64 around the second storage space 56. The attachment bracket 57 is formed such that the joint portions 61 and 62 with the cover body 60 embrace a part of the outer walls 63 and 64 of the second storage space 56 from the outside.
[0003]
The second storage space 56 is provided with a partition wall 65, and the mounting bracket 57 is provided with a mounting hole 57a. Furthermore, another mounting bracket 68 having a mounting hole 68a is provided so as to embrace the outer walls 66, 67 of the first storage space 55 from the outside. The mounting bracket 68 is at a diagonal position on the cover main body 60 of the mounting bracket 57, and both support and fix the under cover 52 to the vehicle body side.
[0004]
In the electrical connection box mounting bracket 57 configured as described above, the fuse 53 and the relay 54 can be stored in the first storage space 55, and other components such as connectors can be stored in the second storage space 56 as necessary. Can do. Therefore, components such as the fuse 53, the relay 54, and the connector can be compactly gathered in one place and attached to a vehicle body frame such as an engine room peripheral wall.
[0005]
[Problems to be solved by the invention]
The mounting bracket 57 of the conventional electrical junction box is fixed to the vehicle body frame 70 by bolting via the mounting bracket 57 as shown in FIG. If no other component such as a connector is stored in the second storage space 56, the second storage space 56 is almost hollow. Therefore, when the acting forces F1 and F2 such as vibrations in the directions of arrows B1 and B2 in the figure are transmitted to the electrical connection box 52 through the vehicle body frame 70, the outer walls 63 and 64 around the second storage space 56 are bent. There is a possibility of deformation.
[0006]
That is, when a force F1 in the direction of arrow B1 is applied to the electrical junction box 52, the outer wall 67 of the first storage space 55 is not shown in the figure even if the mounting bracket 57 including the reinforcing rib 58 is firmly fixed to the vehicle body frame 70. Since the outer wall 63 bends as shown by the chain line (67), the outer wall 63 also bends by the maximum deflection δ1 as shown by the two-dot chain line (71). Further, the maximum bending stress acts near the joint 61.
Also, if the acting force is vibration, the next moment F2 in the direction of arrow B2 is applied, so that it is deflected by the maximum deflection δ1 in the reverse direction, that is, in the second storage space 56, and the direction of the maximum bending stress is also in the reverse direction. become. Therefore, the outer wall 63 is repeatedly subjected to stress, and fatigue failure may occur near the joint 61.
[0007]
Further, if the vibration direction also acts on the outer wall 64 in a direction perpendicular to the arrows B1 and B2, as shown by the two-dot chain line (72), the maximum bending stress is It occurs in the vicinity of the junction 62.
[0008]
Actually, the vibration direction is not limited to the arrows B1 and B2 or directions perpendicular thereto, but vibrations in various directions are conceivable. Therefore, the outer walls 63 and 64 vibrate at the same time, and the maximum deflection and the maximum bending stress are further increased, and the fatigue failure is likely to occur near the joint portions 61 and 62 of the outer walls 63 and 64 of the second storage space 56. was there.
Further, the forces F1 and F2 increase as the mass of the electrical junction box 51 increases and the amplitude of the body frame 70 increases, but the frequency of the body frame 70 is inherent to the electrical junction box 51 mainly composed of the outer walls 63 and 64. As the frequency approaches, resonance occurs and the maximum deflections δ1 and δ2 increase, causing fatigue failure in a shorter time.
[0009]
An object of the present invention is to provide a mounting bracket for an electrical junction box that does not cause fatigue failure with respect to vibrations from a vehicle body.
[0010]
[Means for Solving the Problems]
According to the present invention, there is provided a second storage space for storing other components in one corner of a first storage space for storing a plurality of electrical components via a partition wall, and a mounting bracket on an outer wall portion around the second storage space. in the electrical connection box with the mounting bracket is provided across both the outer wall of the corner portion of the electrical junction box body, the junction of the electrical connection box body of the mounting bracket, an outer wall of the first receiving space The problem can be solved by the mounting bracket of the electrical junction box, which extends to a part of the portion and is provided so as to be orthogonal to the partition wall.
[0011]
According to the mounting bracket of the electrical junction box having the above-described configuration, the joint portion of the mounting bracket with the electrical junction box main body is provided to extend to a part of the outer wall portion of the first storage space, so that the strength is weak. The outer wall of the second storage space is reinforced by a mounting bracket that has been extended from the prior art, so that fatigue failure in the vicinity of the joint can be reliably prevented. Therefore, the durability of the mounting bracket of the electrical junction box can be improved.
[0012]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, an embodiment of a mounting bracket for an electrical junction box according to the present invention will be described in detail based on FIG. FIG. 1 is a perspective view showing an embodiment of a mounting bracket for an electrical junction box according to the present invention, and FIG. 2 is a plan view of FIG.
[0013]
As shown in FIGS. 1 and 2, in the electrical connection box mounting bracket of the present embodiment, the cover body 10 in which the under cover 2 constituting the lower part of the electrical connection box 1 is formed by the outer walls 16 and 17, and the body frame It is comprised from the two mounting brackets 7 and 18 for attaching to. A first storage space 5 for storing electrical components such as a fuse 3 and a relay 4 is formed in the cover body 10 of the under cover 2. A second storage space 6 for storing other components such as a connector is formed at one corner of the first storage space 5, and the second storage space 6 and the first storage space 5 are partitioned by a partition wall 15. .
[0014]
In addition, one mounting bracket 7 is provided at the corners of the outer walls 13 and 14 constituting a part of the second storage space 6 so as to straddle both outer walls, and the other mounting bracket 7 is mounted at an opposite position on the diagonal line. A bracket 18 is provided. The mounting brackets 7 and 18 are provided with mounting holes 7a and 18a through which mounting bolts are inserted.
[0015]
The one mounting bracket 7 includes a reinforcing rib 8 and is integrated with the cover main body 10, and the joint portions 11 and 12 with the cover main body 10 are part of the outer walls 16 and 17 of the first storage space 5. It is extended. That is, the extending portion of the reinforcing rib 8 extends so as to embrace a part of the outer walls 13 and 14 of the second storage space 6 and the outer walls 16 and 17 of the first storage space 5 from the outside and perpendicular to the partition wall 15. The outer walls 13 and 14 of the second storage space 6 are reinforced.
[0016]
In the electrical connection box mounting bracket 7 having the above-described configuration, the joint portions 11 and 12 of the mounting bracket 7 including the reinforcing rib 8 and the cover body 10 are connected to the first storage space 5 from the outer walls 13 and 14 of the second storage space 6. Since the outer walls 13 and 14 of the second storage space 6 are reinforced by the mounting bracket 7 including the auxiliary ribs 8, the strength is increased. That is, the bending as shown in FIG. 4 does not occur, and fatigue failure near the joints 11 and 12 can be reliably prevented. Therefore, an electrical junction box having excellent durability and high reliability can be obtained.
[0017]
In addition, when a connector is not accommodated in 2nd accommodation space, prevention of the further bending etc. can be aimed at by accommodating a dummy member.
That is, when other parts such as connectors are not stored in the second storage space, a dummy member having an outer peripheral dimension equal to the inner peripheral dimension is inserted into the second storage space, so that the outer wall of the second storage space is inserted. Inward bending can be prevented. Therefore, even if it receives an action force such as vibration, it does not bend greatly, it is possible to further prevent fatigue failure in the vicinity of the joint, and to further improve the durability of the electrical junction box.
[0018]
【The invention's effect】
As described above, according to the mounting bracket of the electrical junction box of the present invention, the joint portion of the mounting bracket with the electrical junction box main body is provided extending to a part of the outer wall portion of the first storage space. In addition, the outer wall of the second storage space, which is weak in strength, is reinforced by the mounting bracket extended from the conventional one, so that fatigue failure or the like in the vicinity of the joint can be surely prevented. Therefore, the durability of the mounting bracket of the electrical junction box can be improved, and a highly reliable electrical junction box can be obtained.
[Brief description of the drawings]
FIG. 1 is a perspective view showing a mounting bracket of an electrical junction box according to the present invention.
FIG. 2 is a plan view of FIG.
FIG. 3 is a plan view showing a mounting bracket of a conventional electrical junction box.
4 is an explanatory diagram of a main part in FIG. 3;
[Explanation of symbols]
1 Electrical Connection Box 2 Undercover 5 First Storage Space 6 Second Storage Space 7 Mounting Bracket 8 Reinforcement Rib 10 Cover Body (Electric Connection Box Body)
11, 12 Joint part 13, 14 Outer wall 16, 17 Outer wall

Claims (1)

Provided through the partition wall a second accommodation space for accommodating the other components in the corner of the first housing space for housing a plurality of electrical components, in an electrical junction box having a mounting bracket to the outer wall portion surrounding the second receiving space, wherein mounting brackets are provided across both the outer wall of the corner portion of the electrical junction box body, the junction of the electrical connection box body of the mounting bracket, extending to a part of the outer wall portion of the first receiving space The mounting bracket for the electrical junction box is provided so as to be orthogonal to the partition wall.

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