JPH0431902Y2 - - Google Patents

Description

[Detailed Description of the Invention] (Field of Industrial Application) The present invention relates to the body structure of an automobile.

(Prior Art) As an example of the body structure of a conventional passenger car, a side view of the body of a three-box type front door car is shown in FIG. In the figure, the reference numeral 10 generally indicates the vehicle body, 12 the front structure including the engine room and the passenger compartment, 14 the rear structure including the trunk room, 16 the center pillar (often called the B pillar), and 18 the rear structure including the trunk room. Side sills 20 extending in the front-rear direction are provided at the lower ends of both sides in the width direction of the vehicle, and 20 is a roof. In the vehicle body 10, the side sill 18 is originally an important strength member, and in particular, the shaded portion A in the figure is the joint portion between the front structure 12 and the rear structure 14, and is a part that increases the strength and rigidity of the vehicle body. Up,
This is a particularly important part. If the strength and rigidity of part A is insufficient, cracks may occur in this part due to repeated driving on rough roads in areas where roads are not maintained, and handling stability, vibration, and noise may be affected. Problems such as having a negative impact on the environment may occur. Now, conventional A
Referring to FIG. 2, which shows the structure of the section in cross section taken along the line X-X in FIG. Shion 24 is the wheel house inner 2 that accommodates the rear wheel.
6. 28 is a side sill outer, which is connected to the side sill inner 22;
(Usually joined by spot welding both flanges), the side sill 18 is formed as a closed cross-section structure. side sill 18
A reinforcing plate 30 made of a plate member extending in the longitudinal direction and the vertical direction of the vehicle body is fixed inside the reinforcing plate 30. At the rear end of the reinforcing plate 30, there is a horizontal wall ( A bulkhead 32 is provided, and the above-mentioned members are connected by spot welding as indicated by the X marks in the figure. Note that 34 in the figure indicates a quarter outer. In this conventional configuration, since the side wall 32 is only one piece, it cannot necessarily be said that the strength and rigidity are sufficient, and it is necessary to further strengthen the strength and rigidity to withstand heavy use in areas with poor road conditions. It is rare.

(Problems to be solved by the invention) The purpose of the invention is to provide a simple and inexpensive structure that further strengthens the strength and rigidity of the joint between the rear end of the side sill and the rear structure of the vehicle body. be.

(Means for Solving the Problems) The present invention was devised to achieve the above object, and includes a side sill that is formed of a side sill outer and a side sill inner and has a closed cross section, and a side sill that is fixed to the inside of the side sill and that is fixed to the vehicle body. A reinforcing plate extending in the longitudinal direction and the vertical direction, a first horizontal wall formed near the rear end of the reinforcing plate and extending in the vehicle width direction, and a first horizontal wall stored inside the side sill and fixed near the rear end of the side sill outer. A side sill outer extension extending forward, and a second lateral wall formed near the front end of the side sill outer extension and extending in the width direction of the vehicle, and behind the first and second lateral walls and the reinforcing plate. The gist of the present invention is a vehicle body structure characterized in that a box structure is formed inside a side sill by an end portion and a side sill outer extension.

(Function) According to the present invention, the first horizontal wall provided near the rear end of the reinforcing plate, the second horizontal wall provided near the front end of the side sill outer extension disposed inside the side sill, Since the rear end portion of the reinforcing plate and the side sill outer extension form a box structure having two side walls, the strength and rigidity of the joint between the rear end of the side sill and the rear structure of the vehicle body is increased. It will be greatly strengthened.

(Example) An example of the present invention will be specifically described below with reference to FIGS. 3 and 4. (Members and portions that are substantially the same as those of the conventional structure already explained with reference to FIGS. 1 and 2 are designated by the same reference numerals, and redundant explanation will be omitted.) In the present invention, A first horizontal wall 36 extending in the vehicle width direction is formed at the rear end portion of a reinforcing plate 30 disposed inside the side sill 18, and a side sill outer extension 38 is fixed to the rear end portion of the side sill outer 28. A second side wall 4 is housed inside the side sill 18 and extends in the vehicle width direction near the front end of the extension 38.
0 is formed. (Regarding the first horizontal wall 36 and the second horizontal wall 40, "extending in the vehicle width direction" means
It does not necessarily mean that it is perpendicular to the center line in the longitudinal direction of the vehicle body, but it does mean that it has a sufficient component in the width direction of the vehicle, that is, it is perpendicular to the center line.
As shown in the figure, this includes those inclined with respect to the concentric line. ) The rear end portion of the reinforcing plate 30 and the side sill outer extension 38 are
As shown by the cross in the figure, they are integrally connected by spot welding, and as a result, the first and second side walls 3
6 and 40, the rear end portion of the reinforcing plate 30, and the side sill outer extension 38, a box structure portion B is formed at the joint between the rear end portion of the side sill 18 and the vehicle body rear structure 14. . By forming the box structure part B, the strength and rigidity of the part A in Fig. 1 are significantly strengthened, the durability and steering stability when driving on rough roads are improved, and vibration and noise are reduced. Ru.

In addition, as shown in FIG. 4, the reinforcing plate 3
0 is an upper transverse flange 3 extending outward from the vehicle body.
0a, lower lateral flange 3 extending inward of the vehicle body
0b, these flanges 30a and 30b
The reinforcing plate 30 has a structure in which the reinforcing plate 30 is spot-welded and fixed to the side sill inner 24 or the side sill outer 28, but these flanges are of course eliminated.
The upper and lower edges of the side sill inner 24 and the side sill outer 28 can be directly sandwiched between the upper and lower flanges of the side sill inner 24 and the side sill outer 28, and the three pieces can be integrally stacked and spot welded. Further, the reinforcing plate 30 has an upwardly directed vertical flange 30c adjacent to the box structure B, but the flange is connected to another vehicle body structural member not directly related to the present invention. Further, the vertical flange 36' of the first horizontal wall 36 and the vertical flange 40' of the second horizontal wall 40 are spot welded to corresponding surfaces of the opposing side sill outer extension 38 and the rear end portion of the reinforcing plate 30, respectively. be combined. In FIG. 4, the openings 42 arranged in multiple rows in the reinforcing plate 30 are provided for the purpose of inserting a welding gun during spot welding and for weight reduction.

(Effect of the invention) As described above, the vehicle body structure according to the present invention includes a side sill formed of a side sill outer and a side sill inner and having a closed cross section, a side sill fixed inside the side sill and extending in the longitudinal direction and the vertical direction of the vehicle body. a reinforcing plate, a first horizontal wall extending in the vehicle width direction formed near the rear end of the reinforcing plate, and a side sill outer extract housed inside the side sill and fixed near the rear end of the side sill outer and extending forward. a tensioner, and a second lateral wall formed near the front end of the side sill outer extension and extending in the vehicle width direction, the first and second lateral walls, the rear end portion of the reinforcing plate, and the side sill outer extension. A box structure is formed inside the side sill by means of a tensioner, which significantly improves the strength and rigidity of the rear end of the side sill that connects the front and rear structures of the vehicle body. This is useful in practice because it can improve durability and handling stability, and further reduce vibration and noise.

[Brief explanation of the drawing]

Fig. 1 is a conceptual side view showing the body structure of a three-box type automobile as an example, and Fig. 2 is a conventional structure of section A, which is shaded in Fig. 1, cut in the direction of the arrow along line X-X. 3 is a sectional view similar to FIG. 2 showing an embodiment of the present invention, and FIG. 4 is an exploded perspective view of the members constituting the box portion B in FIG. 3. It is. 10... Vehicle body, 12... Front structure, 14... Rear structure, 18... Side sill, 22... Side sill inner, 24... Side sill inner extension, 26... Wheel house inner, 28...
Side sill outer, 30... Reinforcement plate, 32... Side wall, 36... First side wall, 38... Side sill outer extension, 40... Second side wall, B...
Box structure.

Claims (1)

[Scope of utility model registration request] A side sill formed of a side sill outer and a side sill inner and having a closed cross section, a reinforcing plate fixed to the inside of the side sill and extending in the longitudinal direction and the vertical direction of the vehicle body, and a reinforcing plate formed near the rear end of the reinforcing plate and extending in the width direction of the vehicle. a side sill outer extension that is housed inside the side sill and is fixed near the rear end of the side sill outer and extends forward; and a side sill outer extension that is formed near the front end of the side sill outer extension and extends in the vehicle width direction. extended second
A vehicle body comprising a side wall, and a box structure is formed inside the side sill by the first and second side walls, the rear end portion of the reinforcing plate, and the side sill outer extension. structure.