JPH0539059A - Vehicle center member - Google Patents

Abstract

(57) [Abstract] [Object] An object of the present invention is to reduce the number of manufacturing steps, facilitate rust prevention, and further reduce the weight of a vehicle center member. [Structure] A pair of side plates 11 and 12 extending in the vehicle front-rear direction and separated from each other in parallel, and a top plate 13 connecting the upper ends of the side plates 1112.
In a vehicle member including a jack-up receiving member 16 disposed in the vicinity of the front of the vehicle on the bottom of the vehicle, a tip plate 14 that connects the end portions of the pair of side plates on the vehicle front side,
On the vehicle rear side near the first connecting plate 14, a reinforcing plate 17 for connecting a pair of side plates is provided, and a jack-up receiving member 16 is provided.
Is composed of a pair of flat plates 18 and 19 which are arranged substantially parallel to each other in the vertical direction and welded so as to intersect each other.
The respective side end portions 18a, 18b, 19a, 19b are welded to the side plates 11 and 12, the tip plate 14, and the reinforcing plate 17, respectively.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a vehicle center member.

[0002]

2. Description of the Related Art Generally, a vehicle center member is arranged so as to extend in the vehicle front-rear direction at a vehicle bottom direction substantially center in a vehicle width direction, and a vehicle center member is provided with a jack-up receiving member. .. Conventionally, the jack-up receiving member is formed substantially in the vicinity of the center of the vehicle center member. However, in such a vehicle center member, a large bending force is applied to the vehicle center member at the time of jacking up. It is necessary to improve bending rigidity more than necessary,
The structure tends to be complicated. In order to solve such a problem, for example, a vehicle center member as described in Japanese Utility Model Laid-Open No. 60-1622 has been proposed, and a jack-up receiving member has a structure as shown in FIGS. 6 to 9. It is commonly used.

In FIGS. 6 to 9, the vehicle center member 1 has a void 1a surrounded by walls on all sides.
It has a so-called bag structure. Further, the vehicle center member 1 has a jack-up receiving member 2, and the jack-up receiving member 2 is provided near the vehicle front side end of the bottom portion 3 of the vehicle center member 1 and is shown in FIG. The jack-up receiving member 2 to be formed is formed by squeezing a flat plate and has a convex portion 2a protruding downward. A vehicle body support portion of a jack (not shown) is engaged with the convex portion 2a to jack up the vehicle body.

[0004]

However, in such a conventional vehicle center member, the number of manufacturing steps is increased, rust prevention becomes difficult, and the weight is further increased due to the following reasons. There was a problem that it increased. That is, since the jack-up receiving member 2 is formed by the squeezing process, it takes a lot of time and effort to manufacture it, and the number of manufacturing steps increases. Further, since the jack-up receiving member 2 is formed on the bottom portion 3 of the vehicle center member 1, the bottom portion 3 receives a large force applied at the time of jacking up.
Therefore, it is necessary to make the entire vehicle center member 1 into a bag structure, and it is not possible to deal with the rust generated inside the vehicle center member 1. Further, since the jack-up receiving member 2 is arranged in the vicinity of the end portion of the vehicle center member 1 on the vehicle front side, the load on the center portion of the vehicle center member 1 is reduced, but this center portion is formed due to the bag structure. It becomes extremely difficult to reduce the weight of the vehicle center member 1 by making the rigidity of the portion smaller than that of the rear end, and the weight of the vehicle center member 1 increases more than necessary.

Therefore, an object of the present invention is to provide a vehicle center member which can reduce the number of manufacturing steps, can easily prevent rust, and can be easily reduced in weight.

[0006]

The invention according to claim 1 is
In order to solve the above-mentioned problems, a pair of side plates extending in the vehicle front-rear direction in a state of being substantially parallel to the vertical direction at the vehicle width direction substantially center of the vehicle bottom and connecting the upper ends of the pair of side plates are separated from each other in parallel. In a vehicle member including a top plate and a jack-up receiving member arranged in the vicinity of the front of the vehicle on the bottom of the vehicle, a first member that is substantially parallel to the vertical direction and that connects the ends of the pair of side plates on the front side of the vehicle. A connecting plate and a second connecting plate that is arranged on the vehicle rear side in the vicinity of the first connecting plate so as to face the first connecting plate and connects a pair of side plates, and the jack-up receiving member is provided. It is composed of a pair of flat plates that are welded so as to intersect with each other, arranged substantially parallel to the vertical direction,
Each side end portion of the pair of flat plates has a pair of side plates and the first and second side plates.
It is characterized by being welded to each of the connecting plates.

In order to solve the above-mentioned problems, a second aspect of the present invention, in addition to the structure of the first aspect, is arranged on the vehicle rear side of the second connecting plate so as to be substantially parallel to the second connecting plate. A plurality of third connecting plates that connect the pair of side plates are provided, and the chamber surrounded by the pair of side plates and the top plate is opened vertically downward.

[0008]

According to the first aspect of the invention, the jack-up receiving member is composed of a pair of flat plates welded to each other, which facilitates manufacturing. Further, the jack-up member is welded to the pair of side plates and the first and second connecting plates, so that the vehicle center member does not need to have a bag structure. Further, since the bag structure is not necessary, it is easy to change the rigidity of the vehicle center member at each position in the vehicle front-rear direction.

According to the second aspect of the present invention, in addition to the function of the first aspect, the plurality of third connecting plates are arranged so that the chamber surrounded by the pair of side plates and the top plate is opened vertically downward. However, the required rigidity is secured.

[0010]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below with reference to the drawings. 1 to 5 are views showing an embodiment of a vehicle center member according to the present invention. First, the configuration will be described. 1 to 5, reference numerals 11 and 12 denote a pair of side plates, and the side plates 11 and 12 extend in the vehicle front-rear direction in a state of being substantially parallel to the vertical direction at a substantially center of a vehicle bottom portion (not shown) in the vehicle width direction. Separated. The side plates 11 and 12 are an upper top plate 13, front and rear front end plates 14 and rear end plates.
It is integrally molded with 15. That is, the top plate 13 connects the upper ends of the side plates 11 and 12. Reference numeral 16 is a jack-up receiving member, and the jack-up receiving member 16 is arranged near the front of the vehicle at the bottom of the vehicle.

The tip plate 14 is a member that connects the end portions of the side plates 11 and 12 on the front side of the vehicle and is substantially parallel to the vertical direction, and constitutes a first connection plate. A reinforcing plate 17 is arranged on the rear side of the vehicle in the vicinity of the tip plate 14, and the reinforcing plate 17 faces the tip plate 14 and faces the side plate 1.
1 and 12 are connected to form a second connecting plate. The jack-up receiving member 16 is composed of a pair of flat plates 18 and 19 which are arranged substantially parallel to each other in the vertical direction and welded so as to intersect with each other. The side end portions 18a, 18b, 19a and 19b of the flat plates 18 and 19 are formed. Is
It is welded to the side plates 11 and 12, the tip plate 14, and the reinforcing plate 17, respectively. Specifically, as shown in FIG. 3A, notches 18c and 19c are formed near the center of each of the flat plates 18 and 19, and the notches 18c and 19c are formed as shown in FIG. 3B. And weld the intersection C of both plates. Next, as shown in FIG. 4, flat plates 18 and 19 welded to each other are arranged with respect to the side plates 11 and 12, the tip plate 14 and the reinforcing plate 17, and the side end portions 18a, 18b, 19a and 19b are attached to these plates. Weld to.

A plurality of plate-shaped ribs 20 to 23, which are substantially parallel to the reinforcing plate 17, are arranged on the vehicle rear side of the reinforcing plate 17.
23 to 23 and the rear end plate 15 are a plurality of third plates connecting the side plates 11 and 12.
Configure the connecting plate. As shown in FIG. 5, the chamber 24 surrounded by the side plates 11 and 12 and the top plate 13 is opened vertically downward. Therefore, the vehicle width direction vertical cross section of the vehicle center member of the present embodiment has a U-shaped cross section having an opening at the bottom.

According to the above-mentioned structure, the jack-up receiving member 16 is composed of the pair of flat plates 18 and 19 welded to each other. Therefore, as compared with the conventional product formed by the squeezing process, Can be facilitated and the number of manufacturing steps can be reduced. Further, since the jack-up member 16 is welded to the side plates 11 and 12, the tip plate 14, and the reinforcing plate 17, that is, is welded and fixed to a plate member substantially parallel to the vertical direction, it is possible to eliminate the conventional bottom plate. You can
The bag structure can be eliminated. Therefore, rust prevention measures can be facilitated.

Further, by eliminating the need for the bag structure, it is possible to easily change the rigidity of the vehicle center member at each position in the vehicle front-rear direction. The rigidity of each position can be changed only by increasing or decreasing the arrangement position and the number. In this embodiment, since the jack-up receiving member 16 is arranged on the front side of the vehicle, the rigidity required near the center of the vehicle center member is small. It is smaller than. In this way, it becomes easy to change the rigidity at each position in the vehicle front-rear direction, and it is not necessary to make the plate material constituting the vehicle center member thicker than necessary, or to provide excessive reinforcing members. The weight of the vehicle center member can be reduced.

Furthermore, by disposing a plurality of ribs 20 to 23, the required rigidity can be easily achieved even if the vertical cross section of the vehicle center member in the vehicle width direction has a U-shaped cross section having an opening downward. Can be secured.

[0016]

According to the invention described in claim 1, since the jack-up receiving member is composed of a pair of flat plates welded to each other, the manufacturing can be facilitated and the number of manufacturing steps can be reduced. it can. Further, since the jack-up member is welded to the pair of side plates and the first and second connecting plates, it is possible to eliminate the conventional bag structure and facilitate rust prevention measures.

Furthermore, since the bag structure is no longer necessary,
The rigidity of the vehicle center member at each position in the vehicle front-rear direction can be easily changed, and the vehicle center member can be easily reduced in weight. According to the invention described in claim 2, in addition to the effect of claim 1, since a plurality of third connecting plates are arranged, even if the chamber surrounded by the side plate and the top plate is opened vertically downward. The required rigidity can be easily ensured.

[Brief description of drawings]

FIG. 1 is a plan view showing an embodiment of a vehicle center member according to the present invention.

FIG. 2 is a side view of the vehicle center member in FIG.

3A and 3B are views for explaining a method of assembling the jack-up receiving member of FIG. 1, where FIG. 3A is a perspective view seen from below before assembly and FIG. 3B is a perspective view seen from below after assembly. ..

FIG. 4 is a diagram illustrating a method of attaching the jack-up receiving member of FIG.

5 is a cross-sectional view taken along line XX in FIG.

FIG. 6 is a side view of a conventional vehicle center member.

FIG. 7 is a perspective view of the vehicle center member in FIG. 6 seen from below.

8 is a view for explaining the cross-sectional shape of the vehicle center member of FIG. 6, (a) is a cross-sectional view taken along the line YY in FIG.
7B is a sectional view taken along the line ZZ in FIG.

9A and 9B are diagrams showing the jack-up receiving member of FIG. 6, in which FIG. 9A is a plan view thereof, and FIG.
FIG. 9C is a sectional view taken along the arrow K, and FIG.

[Explanation of reference signs] 11, 12 A pair of side plates 13 Top plate 14 Tip plate (first connecting plate) 16 Jack-up receiving member 17 Reinforcing plate (second connecting plate) 18, 19 Pair of flat plates 18a, 18b, 19a, 19b Side ends of a pair of flat plates 20 to 23 ribs (third connecting plate) 24 chamber C Intersection of a pair of flat plates

Claims (2)

[Claims] 1. A pair of side plates extending in the vehicle front-rear direction in a state of being substantially parallel to a vertical direction at a vehicle bottom width substantially center thereof, and a top plate connecting upper ends of the pair of side plates. And a jack-up receiving member arranged in the vicinity of the front of the vehicle on the bottom of the vehicle, wherein a first connecting plate that connects the end portions of the pair of side plates on the vehicle front side and is substantially parallel to the vertical direction is provided. And a second connecting plate which is arranged in the vicinity of the first connecting plate on the vehicle rear side so as to face the first connecting plate and which connects a pair of side plates. And a pair of flat plates welded so as to intersect with each other.
A vehicle center member, each of which is welded to a connecting plate. 2. A plurality of third connecting plates, which are arranged on the vehicle rear side of the second connecting plate so as to be substantially parallel to the second connecting plate and which connect the pair of side plates, are provided. The vehicle center member according to claim 1, wherein the chamber surrounded by the top plate is opened vertically downward.