JPH1159497A - Body side structure - Google Patents

Abstract

(57) [Problem] To provide a vehicle body side structure capable of securing a vehicle interior space without reinforcing the entire center pillar in a side collision of an automobile. SOLUTION: Within a cross section of a side roof rail 12, a weak portion 14 and flat portions 15a, 15b sandwiching the weak portion 14 are provided.
At the position of the side sill 11 below the center pillar, a partition 16 for dividing the cross section of the side sill in the vehicle width direction is provided between the sill inner 11a and the sill outer 11b. The center pillar 13 is joined to the side surface, and the weakly formed sill inner 11a is joined to the inner surface of the partition 16 to form the sill inner 1
1a and the end of the center cross member 17a disposed below the center pillar 13 are joined to form a side sill weakened portion A, and the ends of the cross members 17b and 17c disposed before and after the center pillar 13 are connected. The sill outer 11b was joined to form a side sill high strength region B for input in the vehicle width direction.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a vehicle body side structure.

[0002]

2. Description of the Related Art As a conventional side structure of a vehicle body, for example, a center pillar reinforcing structure in which strength near an intersection between a center pillar and a side sill is improved is known (Japanese Patent Laid-Open No. Hei 4 (Kokai) No. H4-104).
126681). This center pillar reinforcement structure is shown in FIG.
As shown in the figure, by providing the reinforcement 3 between the sill outer 2a and the sill inner 2b at the joint between the center pillar 1 and the side sill 2, the center pillar 1
In this case, the strength of the joint between the side sill 2 and the side sill 2 is improved. The reinforce 3 has both ends 4 in the vehicle longitudinal direction.
a and 4b are joined to the sill inner 2b, and have a protrusion 5 at the center toward the sill outer 2a, and a bead 6 extending along the longitudinal direction of the center pillar 1 protruding in the opposite direction toward the sill inner 2b. And the bead 6 is joined to the inner projection 2c provided on the sill inner 2b. In such a vehicle body side structure, a pair of closed cross-sectional structures 7 along the length direction of the center pillar 1 can be formed at the joint between the center pillar 1 and the side sill 2.
The rigidity at the joint can be improved.

However, in such a conventional side structure of the vehicle body, since the rigidity at the joint between the center pillar 1 and the side sill 2 is improved, a large moment is applied to the center pillar 1 from the initial stage of a collision in a side collision. Works. Therefore, in order to secure the interior space of the vehicle at the time of a side collision and to secure the side collision performance, it is necessary to reinforce the center pillar 1 as a whole, and there is a problem that the weight is increased accordingly.

[0004] Therefore, the present invention provides a method for performing a side collision.
An object of the present invention is to provide a vehicle body side structure capable of securing a vehicle interior space without reinforcing the entire center pillar.

[0005]

According to a first aspect of the present invention, there is provided a vehicle body side structure comprising: a side sill disposed on a lower side surface of a vehicle body and comprising a sill inner and a sill outer; In a vehicle body side structure including a side roof rail disposed on a vehicle and a center pillar connecting the side sill and the side roof rail, a center including a weak portion in a cross section of the side roof rail and a flat portion sandwiching the weak portion At the side sill position under the center pillar, a partition for dividing the side sill cross section in the vehicle width direction is provided between the sill inner and the sill outer, and the center pillar is joined to an outer surface of the partition, The weak inner sill inner is joined to the inner surface of the partition wall, and it is arranged below this sill inner and the center pillar. A side sill weak portion is formed by joining an end portion of the center cross member, and an end portion of the cross member provided before and after the center pillar is joined to the sill outer, so that a high strength area of the side sill against a vehicle width direction input is provided. Is formed.

In the vehicle body side structure according to the second aspect, the fragile portion in the side roof rail is crushed at the time of a side collision,
The center pillar is rotated around the rotation mechanism above the center pillar as a center, and the rotation allowable angle until the flat plate contacts is set to be equal to the deformation amount of the side sill fragile portion. I do.

According to a third aspect of the present invention, the inner surface of the sill inner in the vehicle width direction is inclined upward from the lower side to the outer side in the vehicle width direction. It is equal to the inclination angle of the lower part of the center pillar when the limit value is reached.

In the vehicle body side structure according to the fourth aspect, the shape of the side sill on the outer side in the vehicle width direction is curved, and the side sill fragile portion enters the inside of the side sill high strength region before and after the center pillar in the vehicle width direction. It is characterized by the following.

According to a fifth aspect of the present invention, there is provided a vehicle body side structure, wherein a rotation mechanism for an upper portion of a center pillar including a weak portion and a flat portion sandwiching the weak portion is provided in a cross section of the side roof rail, while a lower portion of the lower portion of the center pillar is provided. At the side sill position, a partition is provided in the sill inner to divide the cross section of the sill inner in the vehicle width direction, and a center pillar is joined to an outer surface of the partition,
The sill inner formed weakly on the inner surface of the partition wall and the end of a center cross member provided below the center pillar are joined to form a side sill weakened portion. And an end of a cross member disposed before and after the center pillar is joined to a sill inner to form a side sill high strength region with respect to a vehicle width direction input.

Further, in the vehicle body side structure according to claim 6, the sill inner is formed of a light alloy extruded material.

The vehicle body side structure according to claim 7 is characterized in that a floor panel is attached to an upper end of the side sill, and the cross member is disposed on a lower surface of the floor panel.

[0012]

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a perspective view showing an embodiment of a vehicle body side structure according to the present invention; FIG.
FIG. 1 is a perspective view showing a first embodiment of a vehicle body side structure,
A side sill 11 including a sill inner 11a and a sill outer 11b disposed on a lower side surface of the vehicle body, a side roof rail 12 disposed on an upper side surface of the vehicle body in a front-rear direction, and a center pillar for connecting the side sill 11 and the side roof rail 12 in a vertical direction. 13 together with a basic configuration. In the cross section of the side roof rail 12, a fragile portion 14 against torsion input, a flat portion 15a sandwiching the fragile portion 14 from above and below,
A rotation mechanism R above the center pillar 15b is provided, and the center pillar 13 is rotatable around the rotation mechanism R above. The upper flat portion 15a is fixed to the vehicle body, and the lower flat portion 15b is joined to the center pillar 13 side. The flat portions 15a and 15b face each other, are directly joined at one end, and are joined at upper and lower positions so as to sandwich the fragile portion 14 at the other end,
The flat portions 15a and 15b and the fragile portion 14 form a substantially triangular cross-sectional shape.

On the other hand, at the lower end of the center pillar 13, a partition 16 for dividing the cross section of the side sill 11 in the vehicle width direction between the sill inner 11a and the sill outer 11b of the side sill 11.
The center pillar 13 is provided on the outer surface of the partition 16.
Is bonded to the inner surface, and the weakened sill inner 11a is bonded to the inner surface. An end of a center cross member 17a is joined to the sill inner 11a, and a partition 16 sandwiched between the center pillar 13 and the center cross member 17a.
And the closed cross-section formed by the sill inner 11a forms a fragile portion A against entry in the vehicle width direction. On the other hand, at the front and rear portions of the center pillar 3, the ends of the sill outer 11b and the front and rear cross members 17b and 17c are joined to form a high strength region B.

FIG. 2 shows the strength of the side sill 11 in the vehicle body side direction. In the side sill weak portion A, the side sill 11 is fragilely formed by the closed cross-section formed by the partition wall 16 and the sill inner 11a, so that the side surface strength of the vehicle body is low. Direct connection increases the vehicle body side strength.

Next, the operation of the vehicle body side structure having the above configuration will be described. Figure 3 shows the side sill 1 during a side collision.
FIG. 4 is an enlarged cross-sectional view of the roof side rail, and FIG. 5 is a side sill 11 and a center pillar 13.
It is shown. In the initial stage of the side collision, the side sill high strength region B joined to the cross members 17b and 17c set before and after the center pillar 13 with respect to the input F from the colliding vehicle 18 generates anti-forces Fb and Fc, and the vehicle 1
8 is prevented, and after the speed is reduced, the side sill fragile portion A is deformed. With the deformation of the side sill fragile portion A, the center pillar 13 rotates about the upper rotation mechanism R. As shown in FIG. 4, in the side roof rail 12, the flat portion 15 b connected to the center pillar 13 rotates toward the flat portion 15 a while crushing the fragile portion 14. Then, when the deformation of the fragile portion 14 reaches a predetermined deformation amount, the flat portions 15a and 15b sandwiching the fragile portion 14 come into contact with each other, a reaction force Ra against the torsion input rises, and the center pillar 13 moves to the vehicle interior side. Prevent intrusion. On the other hand, in the lower part of the center pillar 13, as shown in FIG. 5, the reaction force Fa against the input in the vehicle width direction rises due to the function of the center cross member 17a, thereby preventing the center pillar 13 from entering the vehicle interior. .

The rotation allowable angle α of the rotation mechanism R above the center pillar provided on the side roof rail 12 (the amount of deformation of the fragile portion 14 torsion input provided on the side roof rail 12) is determined by the deformation of the side sill fragile portion A. Because it was set from the stroke amount S, the side roof rail 1
2 against the twisted input 2 and the center pillar 1
The rise of the reaction force Fa with respect to the vehicle width direction entry at the lower portion 3 can be generated almost simultaneously, and the effect can be exhibited more efficiently. The center pillar 13 is provided on the partition wall 1 provided in the cross section of the side sill 11.
6, which functions as a transmission path for transmitting the input to the center pillar 13 as a force in the vehicle width direction to the side sill fragile portion A, and efficiently moves the side sill fragile portion A in the early stage of a collision. It can be deformed in the vehicle width direction.

Accordingly, the collision energy is absorbed, the vehicle 18 is decelerated, and the collision energy when the maximum moment acts on the center pillar 13 is reduced, while suppressing the extreme increase in the moment at the center pillar 13 at the beginning of the collision. However, the burden on the center pillar 13 can be reduced, and the amount of deformation can be suppressed to a predetermined value to secure the vehicle interior space.

FIGS. 6 and 7 show a second embodiment of the vehicle body side structure according to the present invention. In this embodiment, the sill inner 11a has a surface 11a 'on the inner side in the vehicle width direction, which is inclined from the lower side to the upper side, and is inclined outwardly in the vehicle width direction. Center pillar inner 13 when the amount reaches the limit
is set equal to the angle of inclination near the connection to the side sill 17a, that is, the allowable angle α of the rotation mechanism R above the center pillar provided on the side roof rail 12. In this embodiment, the same operation as in the above-described embodiment is achieved, and when the side sill fragile portion A is crushed and the amount of deformation reaches the limit, the sill inner 11a is inclined so as to be parallel to the center pillar inner 13a. Inner surface 11 in width direction
a ′ supports the lower portion of the center pillar 13 over the entire joint surface C, and suppresses a change in the angle of the lower portion of the center pillar 13 about the vehicle longitudinal direction. For this reason, the support condition of the lower part of the center pillar 13 can be made closer to the fixed end support state in the beam problem of the material dynamics. Thereby, the moment generated near the center of the center pillar 13 is reduced,
Deformation at the center of the center pillar 13 can be reduced. Further, since the upper corner of the sill inner 11a on the vehicle cabin side is closer to the outside than the lower corner, it is possible to improve the occupant getting on and off the side sill 13 when getting off.

FIGS. 8 and 9 show a third embodiment of the vehicle body side structure according to the present invention. In this embodiment, the side sill weak portion A formed near the joint between the side sill 11 and the center pillar 13 is a sill outer 11b.
Is curved inward of the vehicle, and has a shape that is inwardly inward in the vehicle width direction as compared with the high-strength region B formed before and after that. Therefore, even in this embodiment, in addition to the same operation and effect as the above-described first embodiment, the side sill high strength region B protruding outward in the vehicle width direction from the side sill weak portion A at the time of a side collision is provided. Before the force F in the vehicle width direction acts on the center pillar 13, the reaction forces Fa, F
b is generated, and the burden on the center pillar 13 can be further reduced.

FIG. 10 to FIG. 12 show a fourth embodiment of the vehicle body side structure according to the present invention. In the vehicle body side structure according to this embodiment, a partition 16 that divides the cross section of the sill inner 11a in the vehicle width direction at the lower position of the center pillar 13 is formed integrally with the sill inner 11a, and the center pillar 13 is joined to the outer surface of the partition 16 And this Sylinna 1
1a and an end of a center cross member 17a disposed below the center pillar 13 are joined to form a side sill weak portion A, while the sill inner 1 before and after the center pillar 13 is formed.
1a, a reinforcing rib 18 is provided in the vehicle width direction, and the sill inner 1 is provided.
1a and the front and rear ends of the cross members 17b and 17c are joined to form a side sill high-strength region B for input in the vehicle width direction.
Is formed.

The sill inner 11a is provided near the joint between the center pillar 13 and the side sill 11 by removing the outer side surface of the vehicle body from the reinforcing ribs 18 and the partition walls 16 arranged in the vehicle width direction to form a joint surface E with the center pillar 13. Is formed.
The lower end of the center pillar 13 is joined to the joint surface E, and the sill outer 11b is joined to the sill inner 11a and the center pillar 13 so as to cover the joint. Further, reinforcing ribs 18 are formed in the cross section of the sill inner 11a in the cross section of the sill inner 11a before and after the side sill weakened portion A, and the front and rear of the vehicle between the sill inner 11a and the extension member 19 extending in the vehicle front and rear direction. The cross members 17a, 17 having the lower surface height equal to the height of the reinforcing ribs 18 are provided in the lower portion of the center pillar 13 in the direction, and in the region where the reinforcing ribs 18 are set before and after the center pillar 13.
b, 17c, the reinforcing rib 1 in the vehicle width direction is provided.
In the lower part of the center pillar 13 where there is no 8, a side sill fragile portion A having a closed cross section is formed between the center pillar 13 and the center cross member 17 a, and the strength is high at the part where the cross members 17 b and 17 c before and after the center pillar 13 are arranged. Region B is formed. In this embodiment, a floor panel 20 is further attached to the upper surfaces of the cross members 17a, 17b, 17c and the extension members 19 and the upper end of the sill inner 11a.

In this embodiment, the same operation and effect as those of the first embodiment can be obtained. In addition, the sill inner 11a can be formed from a light alloy extruded material having a high degree of freedom in thickness and sectional shape, and the number of parts can be reduced. Be reduced. Also, the cross member 17
The reinforcing ribs 18 in the cross section of the sill inner 11a having the same height as the lower surfaces of the b and 17c are separated from the side sill 11 by the cross member 1.
Since the high-strength region B in the sill inner 11a can be formed without penetrating the cross members 17b, 17c through the side sill 11, the structure can be simplified, since it functions as a transmission path of force to the 7b, 17c. Also,
Since the floor panel 20 is attached to the upper end of the side sill 11a, the side sill 11a is prevented from falling into the vehicle interior. Also, a cross member 1 arranged in the vehicle width direction
Since the members 7a, 17b, and 17c are arranged on the lower surface of the floor panel 20, the cross members 17a, 17b, and 17c can be set at required positions without violating the foot space of the occupant.

[0023]

As described above, according to the vehicle body side structure of the present invention, in the early stage of a side collision, the cross member in the high strength region set before and after the center pillar generates a reaction force, and a collision object is generated. Extremely low momentum at the center pillar due to deformation of the vulnerable part to the torsional input provided on the side roof rail and the vulnerable part to the vehicle width direction input provided at the lower part of the center pillar while preventing intrusion and reducing the speed Absorbs collision energy without increasing energy. Then, when the amount of deformation reaches a predetermined amount of deformation, a reaction force against the torsional input of the side roof rail and a reaction force against the vehicle width direction input below the center pillar rises, and the reaction force of the center pillar further into the vehicle interior is increased. Prevent intrusion. Therefore, the collision energy is absorbed, the vehicle is decelerated, and the collision energy when the maximum moment acts on the center pillar is reduced while suppressing the extreme increase in the moment generated in the center pillar at the initial stage of the collision. Is reduced, and the amount of deformation can be suppressed to a predetermined value to secure a space in the vehicle interior.

Also, since the rotation permissible angle of the rotation mechanism above the center pillar provided on the side roof rail is set to be equal to the deformation amount of the side sill fragile portion, the reaction force against the torsional input of the side roof rail and the center pillar lower part. Can be generated almost simultaneously at the same time with respect to the input in the vehicle width direction, and the effect can be exhibited more efficiently.

The center pillar is joined to the outer surface in the vehicle width direction of the partition wall provided in the cross section of the side sill.
In the case of a side collision, the body pillar structure functions as a transmission path for transmitting the input to the center pillar to the side sill vulnerable part as force in the vehicle width direction, and efficiently deforms the vulnerable part in the vehicle width direction in the initial stage of collision. By reducing the collision energy when a large moment acts on the center pillar by preventing the collision vehicle from entering and decelerating while suppressing the extreme increase of the moment in the initial center pillar, the burden on the center pillar is reduced, The amount of deformation can be suppressed to a predetermined value to secure the vehicle interior space.

The inner surface of the sill inner in the vehicle width direction is directed upward from below in the vertical direction and is inclined outwardly in the vehicle width direction. The inclination angle is determined when the side sill fragile portion reaches the limit value. Because it is equal to the inclination angle of the lower part of the center pillar,
When the sill inner at the lower part of the center pillar is crushed and the amount of deformation reaches the limit, the lower part of the center pillar can be supported by the entire joint surface of the center pillar and the sill inner, and the supporting condition of the lower center pillar is fixed in the beam problem of material mechanics By approaching the end support state, the moment generated near the center of the center pillar in the vertical direction can be reduced. In addition, the upper corner of the sill inner on the vehicle interior side is closer to the outside than the lower corner, so that the occupant getting on and off the side sill when getting off the vehicle is improved.

Further, the shape of the side sill on the outer side in the vehicle width direction is curved, and the side sill weak portion enters the vehicle width direction inside compared with the high strength region of the side sill before and after the center pillar, so that the joint portion between the center pillar and the side sill at the time of side collision. The side sill high-strength region protruding outward from the vicinity in the vehicle width direction generates a reaction force before the force in the vehicle width direction acts on the center pillar, and the burden on the center pillar can be reduced.

In addition, by forming the sill inner from a light alloy extruded material having a high degree of freedom in thickness and cross-sectional shape, the above effects can be obtained by appropriately selecting the thickness and cross-sectional shape while reducing the number of parts. Can be efficiently increased.

Further, by attaching the floor panel to the upper end of the side sill, it is possible to prevent the side sill from falling into the vehicle interior. Furthermore, by arranging the cross member arranged in the vehicle width direction on the lower surface of the floor panel, it becomes possible to set the cross member at a required position without affecting the space under the occupant.

[Brief description of the drawings]

FIG. 1 is a perspective view showing a first embodiment of a vehicle body side structure according to the present invention.

FIG. 2 is a strength distribution diagram of a side sill of the vehicle body side structure.

FIG. 3 is a plan view showing the behavior of a side sill and a center pillar at the time of a side collision of the vehicle body side structure.

FIG. 4 is an enlarged sectional view of a roof side rail portion of the vehicle body side structure according to the present invention.

FIG. 5 is a sectional view taken along line LL of FIG. 3;

FIG. 6 is a sectional view of a sill inner showing a second embodiment of the vehicle body side structure according to the present invention.

FIG. 7 is a sectional view showing a positional relationship between a side sill and a center pillar at the time of a side collision in the second embodiment.

FIG. 8 is a perspective view near a side sill showing a third embodiment of the present invention.

FIG. 9 is a plan view showing a side sill shape in the third embodiment.

FIG. 10 is a perspective view showing a fourth embodiment of the present invention.

FIG. 11 is a sectional view taken along the line MM in FIG. 10;

FIG. 12 is a perspective view of an extruded material forming a sill inner in the fourth embodiment.

FIG. 13 is a perspective view showing an example of a conventional center pillar reinforcement structure.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 11 Side sill 11a Sill inner 11b Sill outer 12 Side roof rail 13 Center pillar 14 Weak part 15a Flat part 15b Flat part 16 Partition wall 17a, 17b, 17c Cross member 18 Reinforcement rib 20 Floor panel R Center pillar upper rotating mechanism A Side sill weak part B Side sill height Strength area α Allowable rotation angle S Side sill weak part deformation amount

Claims (7)

[Claims] 1. A side sill disposed on a lower side surface of a vehicle body and including a sill inner and a sill outer, a side roof rail disposed on an upper side surface of a vehicle body, and a center pillar connecting the side sill and the side roof rail. In the vehicle body side structure, a rotation mechanism above a center pillar including a weak portion and a flat portion sandwiching the weak portion is provided in the cross section of the side roof rail, and a side sill position below the center pillar is provided between a sill inner and a sill outer at a side sill position. A partition that divides the side sill cross section in the vehicle width direction is provided, a center pillar is joined to an outer surface of the partition, and a weakly formed sill inner is joined to an inner surface of the partition, and the sill inner and a lower part of the center pillar are disposed. The center sill member is joined to the end of the center cross member to form a weak side sill, An end portion of a cross member provided in the vehicle body and a sill outer are joined to form a high strength region of a side sill against a vehicle width direction input. 2. A permissible rotation angle between when the center pillar rotates around a rotation mechanism above the center pillar and when the flat plate comes into contact with the fragile portion in the side roof rail at the time of a side collision, The vehicle body side structure according to claim 1, wherein the side sill is configured to be equal to the deformation amount of the weak portion. 3. The center pillar lower portion when the inner surface in the vehicle width direction of the sill inner is inclined upward from below to the outer side in the vehicle width direction, and the inclination angle is such that the deformation of the side sill fragile portion reaches a limit value. The vehicle body side structure according to claim 2, wherein the inclination angle is equal to the inclination angle of the vehicle body. 4. The vehicle according to claim 1, wherein the outer shape of the side sill in the vehicle width direction is curved, and the side sill fragile portion enters the vehicle width direction inside as compared with the high strength region of the side sill before and after the center pillar. Body side structure according to any one of the above. 5. A vehicle comprising: a side sill disposed on a lower side surface of a vehicle body and comprising a sill inner and a sill outer; a side roof rail disposed on an upper side surface of the vehicle body; and a center pillar connecting the side sill and the side roof rail. In the vehicle body side structure, a rotation mechanism above the center pillar including a weak portion and a flat portion sandwiching the weak portion is provided in the cross section of the side roof rail, and a cross section of the sill inner is formed on a sill inner at a side sill position below the center pillar. A partition that divides in the vehicle width direction is provided, a center pillar is joined to an outer surface of the partition, and a sill inner formed weakly on an inner surface of the partition and an end of a center cross member disposed below the center pillar. Joined to form a side sill fragile part, reinforcing ribs in the vehicle width direction inside the sill inner before and after the center pillar A vehicle body side structure, wherein a side sill high strength region for a vehicle width direction input is formed by joining an end of a cross member disposed before and after a center pillar and a sill inner. 6. The vehicle body side structure according to claim 5, wherein the sill inner is formed of a light alloy extruded material. 7. The vehicle body side structure according to claim 1, wherein a floor panel is attached to an upper end of the side sill, and the cross member is disposed on a lower surface of the floor panel.