JPH035174Y2 - - Google Patents

Description

[Detailed Description of the Invention] (Industrial Application Field) This invention relates to a center member of a vehicle.

(Prior art) For example, there is a center member for a conventional vehicle as shown in Figure 6 (NISSAN Bluebird 1983 Maintenance Manual Page C-44, 1982)
Published by Nissan Motor Co., Ltd. in December). That is, 10
Reference numeral 0 denotes a center member, which is located below the power unit 101 consisting of an engine, a transmission, etc., at an intermediate portion in the vehicle width direction, and extends in the longitudinal direction of the vehicle to form a part of the vehicle body. This center member 100
A pair of brackets 102 and 103 are fixedly attached to the front bracket 102, a front buffer rod 104 is attached to the rear bracket 103, and a rear power unit mounting device 10 is attached to the rear bracket 103.
5 is attached to elastically support the power unit 101. Furthermore, a dynamic damper 108 is installed inside the center member 100.

The center member 100 supports the power unit 101 in this way, or supports the pair of brackets 10.
2, 103, that is, without supporting the power unit 101, it has the effect of increasing the rigidity of the vehicle body and preventing the power unit 101 from interfering with the road surface.

In this center member 100, the lower opening of the center member main body 106 having a substantially U-shaped open cross section is connected to the closing plate 107.
The entire surface is covered with a closed cross-sectional shape to improve its rigidity.

(Problems to be solved by the invention) However, in such a conventional center member 100, the closing plate 107
Because the structure was such that painting was applied after spot welding to the center member body 106, only the outside surface was painted, and the inside surface was not painted. There was a problem in that the inside of the member 100 rusted, reducing durability.

(Means and operations for solving the problem) This invention was made in view of the above-mentioned conventional problems, and its configuration is such that the opening of the center member body having an open cross section is directed downward, and the power source is It is located below the unit and in the middle part in the vehicle width direction, and extends in the front and rear direction to form a part of the vehicle body,
The center member of the vehicle is provided with a shielding member that covers a portion of the opening in the front and back direction with a closing plate and covers the opening formed by the front end of the closing plate and the center member main body.
However, in the center member of a vehicle, only a part of the opening of the center member main body is covered with a closing plate, and the rest of the opening is open, so it is necessary to paint not only the outer surface of the center member but also the inner surface. In addition to reliably preventing rust from forming, the shielding member blocks muddy water, pebbles, etc. that fly from the front while the vehicle is running, and prevents rust and damage to the inner surface of the intermediate closing plate. .

(Example) Hereinafter, an example of this invention will be described with reference to the drawings.

1 to 4 show one embodiment of this invention, in which a center member 1 is composed of a center member main body 2 and closing plates 3, 4. The center member main body 2 has a substantially U-shaped open cross section, and a rib 2b is provided around the periphery of the opening 2a to increase rigidity. A front bracket 5 and a rear bracket 6 are welded and fixed to the center member main body 2.

A closing plate 3 is fixed by spot welding to a longitudinally intermediate portion of the center member body 2 so as to partially cover the opening 2a of the center member body 2, at least at the longitudinally intermediate portion of the vehicle. Furthermore, a closing plate 4 is fixed to the front end of the opening 2a of the center member body 2 by spot welding to increase the rigidity of the center member 1.

In this state, the center member 1 is painted by means such as electrodeposition coating, and the opening 2 not covered by the closing plates 3 and 4 is coated not only on the outer surface but also on the opening 2 which is not covered by the closing plates 3 and 4.
Painting is also applied to the inner surface of the remaining part of a.

Next, the dynamic damper 7 is attached to the painted center member 1. The dynamic damper 7 has a known structure in which a mass 10 is elastically supported on a substrate 8 via an elastic body 9 made of rubber or elastomer, as shown in FIG. A shielding portion 1 having a shape that is bent toward the mounting side of the center member body 2 and conforming to the inner surface of the center member body 2.
1 is formed. That is, in this embodiment, the shielding portion 11 is provided as a shielding member that covers the opening formed by the tip of the intermediate closing plate 3 and the center member main body 2. Such a dynamic damper 7 is attached to the closing plate 3 in the middle of the center member 1.
With the shielding part 11 in the front position, bolts are placed on the inner surface of the
Fix with nuts 12 and 13. In this way, the dynamic damper 7 is built into the center member body 2, and the shield portion 11 extends substantially upward at the front and is provided with as little gap as possible between the dynamic damper 7 and the inner surface of the center member body 2. covered with.

The center member 1 equipped with this dynamic damper 7 has one end fixed to the front side of the vehicle body 15 such as a subframe or cross member with bolts and nuts 14, and the other end fixed to the rear side of the vehicle body 15 with bolts and nuts 16. The power unit 17 is supported by both brackets 5 and 6, as in the conventional example. The center member 1 is tilted upward toward the front so that the vehicle body 15 runs over an obstacle in the event of a vehicle collision.

According to the center member 1 described above, the rigidity is appropriately increased by the closing plates 3 and 4, and not only the outer surfaces but also the inner surfaces of the center member main body 2 and the closing plates 3 and 4 are painted, so that the Rust can be reliably prevented.
Furthermore, as the vehicle travels, foreign objects such as muddy water and pebbles that are thrown up by the front wheels and scattered from the front are effectively blocked by the shielding portion 11. As a result, damage to the inner surface of the intermediate closing plate 3, rusting of the mass 10 of the dynamic damper 7,
This can prevent breakage and deterioration of the elastic body 9, and prevent mud and pebbles from accumulating on the substrate 8.

FIG. 5 shows another embodiment of this invention, in which the same parts as in the previous embodiment are given the same reference numerals.

In this embodiment, the dynamic damper 7
The substrate 8 has a flat plate shape. Then, the closing plate 3' at the intermediate portion covering the opening 2a of the center member main body 2 is extended forward and bent substantially upward to form a shielding part 11', and this shielding part 11' is connected to the closing plate 3'. It is provided as a shielding member to cover the opening formed by the front end portion of the damper 3' and the center member main body 2, and covers the front of the dynamic damper 7.

Also in this embodiment, since a part of the opening 2a of the center member body 2 is open, the center member body 2 and the closing plates 3', 4
It is possible to reliably paint not only the outer surface but also the inner surface of the vehicle, and the shielding portion 11' can prevent foreign matter from scattering and entering the dynamic damper 7 side while the vehicle is running, so that the same effect as in the embodiment described above can be obtained. It will be done.

Note that this invention does not support the center member that does not support the power unit 17 or the dynamic damper 7.
This can be similarly applied to center members who do not have the following. Further, in the first embodiment, the substrate 8 of the dynamic damper 7 is used as a shielding member to cover the opening formed by the front end portions of the closing plates 3, 3' and the center member main body 2.
In the second embodiment, the closing plate 3'
Although the shielding parts 11 and 11' are formed by extending and bending the shielding parts 11 and 11' to the front, the shielding parts 11 and 11' are not limited to these, and it is also possible to weld and fix separate members to provide the shielding members.

(Effects of the invention) As understood from the above explanation, according to this invention, it is possible to ensure appropriate rigidity in the center member of a vehicle and improve the durability of the center member. can.

[Brief explanation of the drawing]

Fig. 1 is a diagram showing one embodiment of this invention, Fig. 2 is an enlarged view of the main parts, Fig. 3 is a sectional view taken along the line - - of Fig. 2, and Fig. 4 is a diagram showing a dynamic damper.
FIG. 5 is a diagram showing another embodiment of this invention, and FIG. 6 is a diagram showing a conventional structure. 1: Center member, 2: Center member body, 2
a: opening, 3, 3': closing plate,
7: Dynamic damper, 8: Substrate, 9: Elastic body, 10: Mass, 11, 11': Shielding part (shielding member), 15: Vehicle body, 17: Power unit.

Claims (1)

[Scope of utility model registration request] The opening of the center member main body having an open cross section faces downward, and is located below the power unit and at the middle part in the vehicle width direction, and extends in the front and rear direction to form a part of the vehicle body. A center member for a vehicle, characterized in that a part of the direction is covered by a closing plate, and a shielding member is provided to cover an opening formed by the front end of the closing plate and the center member main body.