JP2004299669A - Body frame structure - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To effectively increase strength of a skeleton structure in a car body. <P>SOLUTION: A reinforcing member 12 having substantially triangular closed cross section is arranged in a substantially polygonal hollow cross section 7 of a corner 3 where a front pillar and a roof rail are interconnected in the car body. Edges 13 and 15 of the reinforcing member 12 extend from proximities of respective ridge lines 8 and 16 of the hollow cross section 7 to a proximity of an upper ridge line 14 before the vehicle across the hollow cross section 7. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to a skeletal structure in a vehicle body, and more particularly to a structure in a connecting portion between a front pillar and a roof rail.

  As illustrated in FIGS. 1 and 7, the front pillar 1 and the roof rail 2 of the vehicle body are connected to each other, and the corners 3 inclined with respect to the up-down and front-rear directions respectively form the overlapped outer panel 4, phosphorus hose 5, and inner panel. The structure of a substantially polygonal hollow cross section 7 joined to the front end of the vehicle is conventionally adopted. However, when a large input is applied from the front of the vehicle at the time of a frontal collision of the vehicle, the hollow structure is hollow as shown by a two-dot chain line in FIG. When the vehicle rear lower ridgeline portion 8 of the cross section 7 is bent inward and the polygonal shape is collapsed, the vehicle body skeleton is bent rearward at the corner portion 3 and the vehicle compartment is easily deformed.

  For this reason, conventionally, it has been considered that a phosphorus hose 9 is further added along the inner surface over the range of the portion A in the corner portion 3 or a plurality of bulkheads are added to the corner portion 3 at appropriate intervals. However, in the former case, even if the section modulus is increased, the easiness of the corner portion 3 to be broken is not always eliminated, and there is a technical limitation in spot welding a large number of plate materials. In the latter case, there is a disadvantage that the cost of the vehicle body frame is increased and the productivity is significantly deteriorated.

  Note that, as a technique for increasing the bending rigidity of a pillar in a vehicle, a technique described in Patent Literature 1 below is conventionally known.

JP 2001-233242 A

  In this case, hat-shaped, Z-shaped, and U-shaped reinforcing members are arranged in a pillar having a closed cross section, but all the reinforcing members are provided in a straight portion of the pillar, and the pillar and the roof rail are provided. It has nothing to do with increasing the strength of the corners that connect.

  The present invention seeks to effectively increase the strength of a skeletal structure in a vehicle body.

  For this reason, in the vehicle body skeletal structure according to the present invention, the front pillar and the roof rail are connected at the corners, the corners form a substantially polygonal hollow cross section, and the inside of the front pillar passes through the corners. A reinforcing member extending into the roof rail, wherein the reinforcing member is fixed to the interior surface of the corner portion on the passenger compartment side, extends to the outside of the hollow cross section across the hollow cross section, and They are configured to face each other with a small gap therebetween.

  That is, the reinforcing member extends from the inside of the front pillar through the corner to the roof rail, and also extends from the inner surface of the corner to the outside of the vehicle across the hollow cross section of the corner, thereby reinforcing the corner. Is effective, so that even if a large input is applied from the front of the vehicle at the time of a frontal collision of the vehicle, the corner connecting the front pillar and the roof rail becomes difficult to bend, so that the body frame bends to the rear of the vehicle at the corner. Deformation of the cabin is easily suppressed, and it is possible to protect the occupant. In addition, even if the reinforcing member is fixed to the inner surface of the corner at the cabin side, the reinforcing member is fixed to the inner outer surface of the corner. Since there is no need to perform the above, the shape and mounting method of the reinforcing member can be easily and easily made, and the manufacturing cost of the vehicle body skeleton can be reduced.

  Hereinafter, the embodiments of the present invention will be described with the same reference numerals given to the same parts as those of the conventional device and the same parts of each embodiment.

  In the first embodiment shown in FIGS. 1 and 2, the corners 3 of the vehicle body where the front pillar 1 and the roof rail 2 are connected to each other and inclined with respect to the up-down and front-rear directions are overlapped with the outer panel 4, the phosphorus hose 5, and the inner panel. 6 has a substantially polygonal hollow cross section 7 joined to the front pillar 1, and extends from the substantially V-shaped bent plate 10 and the base plate 11 to a portion A extending from the front pillar 1 to the roof rail 2 through the corner 3. A reinforcing member 12 having a substantially triangular closed cross section is welded to the inner surface of the inner panel 6, that is, the inner surface of the corner 3 on the vehicle interior side.

  At this time, the side 13 of the bent plate 10 extends from the vicinity of the vehicle rear lower ridge 8 of the inner panel 6 to the vicinity of the vehicle front upper ridge 14 of the phosphorus hose 5 across the hollow section 7. Reference numeral 15 extends from the vicinity of the upper side ridge portion 16 of the vehicle interior side of the inner panel 6 to the vicinity of the vehicle front upper ridge portion 14 of the phosphorus hose 5 across the hollow cross section 7, and the top portion 17 of the reinforcing member 12 is small in the vehicle front upper ridge portion 14. They face each other with a gap.

  Therefore, when a large input is applied from the front of the vehicle at the time of a frontal collision of the vehicle and the corner 3 of the vehicle body frame structure is about to be deformed, first, the top 17 of the reinforcing member 12 moves relative to the inside of the vehicle front upper ridgeline 14. The top portion 17 is prevented from laterally slipping or slipping with respect to the vehicle front upper ridgeline portion 14 by being fitted into each other and meshing with each other, and the reinforcing member 12 has a substantially triangular closed cross section. Since the strength of the reinforcing member 12 itself is relatively large, the side 13 of the bent plate 10 of the reinforcing member 12 at the corner 3 is located between the vicinity of the vehicle rear lower ridge 8 and the vicinity of the vehicle front upper ridge 14. And the side 15 of the bent plate 10 acts as a strut member between the vicinity of the upper ridge line portion 16 on the passenger compartment side and the vicinity of the upper ridge line portion 14 on the front side of the vehicle.

Moreover, the reinforcing member 12 having a substantially triangular closed cross section extends from the front pillar 1 to the roof rail 2 through the corner 3 and extends in both the longitudinal direction passing through the corner 3 and the direction crossing the hollow section 7 of the corner 3. And the reinforcing member 12 forms a mountain-shaped closed cross section protruding from the inner surface of the corner portion 3 toward the vehicle outside, and the vehicle side of the reinforcing member 12 is the inner panel 6. Since the reinforcing member 12 is in surface contact with the inner surface and the reinforcing force of the corner member 3 by the reinforcing member 12 is very large, it is possible to effectively suppress the ridge lines 8 and 16 from being bent inside the hollow section 7.
For this reason, it is easily suppressed that the vehicle body frame is bent rearward at the corner portion 3 and the vehicle compartment is deformed, so that it is possible to protect the occupant.

  Further, the reinforcing member 12 has a simple shape with a substantially triangular closed cross section, and the base plate 11 of the reinforcing member 12 is welded to the inner panel 6 in advance, so that the reinforcing member 12 is provided in the hollow cross section 7 of the corner 3. 12 can be easily accommodated, and at this time, it is not necessary to fix the reinforcing member 12 to the phosphorus hose 5 forming the inner surface of the corner portion 3 on the outside of the vehicle, and the shape and mounting method of the reinforcing member 12 are also simple. As a result, it is possible to prevent a remarkable increase in the number of assembling steps of the reinforcing member 12, so that there is a great advantage that the manufacturing cost of the vehicle body skeleton can be reduced.

  In addition, in the case of a front collision of the vehicle, when the inside of the vehicle rear lower ridgeline portion 8 of the corner portion 3 is particularly concerned, instead of the reinforcing member 12, as in the second embodiment shown in FIG. It is also possible to provide a reinforcing member 20 for suppressing the inward bending of the lower rear ridgeline portion 8 of the vehicle.

  In the third embodiment shown in FIG. 4, a front pillar and a roof rail of a vehicle body are connected to each other, and the corners 3 inclined with respect to the up-down and front-rear directions are joined to an outer panel 4 and a phosphorus hose 5 to form a cabin of the outer panel 4. A substantially polygonal hollow section 7 is formed by joining the phosphorus hose 5 and the inner panel 6 disposed inside, and the upper part 6 ′ of the inner panel 6 extends inward in the vehicle width direction, and is formed on a front window (not shown). It is connected to the frame.

  As in the case of the first embodiment, the reinforcing member 12 having a substantially triangular closed cross section extending from the front pillar 1 to the roof rail 2 through the corner 3 is composed of a substantially V-shaped bent plate 10 and a base plate 11. As a result, the inner surface of the inner panel 6, that is, the inner surface of the corner portion 3 is welded and is in surface contact with the inner surface of the corner portion 3. A closed section of a mountain shape is formed, and the top portion 17 of the reinforcing member 12 faces the upper front surface of the phosphorus hose 5 with a small gap therebetween.

Therefore, when a large input is applied from the front of the vehicle at the time of a frontal collision of the vehicle and the corner 3 of the body frame structure is about to be deformed, first, the top portion 17 of the reinforcing member 12 comes into contact with the upper front surface of the phosphorus hose 5 in the vehicle front. That is, the reinforcing member 12 has a substantially triangular closed cross section, the strength of the reinforcing member 12 itself is relatively large, and the reinforcing member 12 having the substantially triangular closed cross section has the corner portions 3 from the front pillar 1. To the roof rail 2, extending in both the longitudinal direction passing through the corner 3 and the direction crossing the hollow section 7 of the corner 3, and furthermore, the vehicle interior side of the reinforcing member 12 is the inner surface of the inner panel 6. And the reinforcing member 12 has a very large reinforcing force on the corner 3, so that the corner 3 can be effectively prevented from being deformed.
For this reason, the deformation of the cabin due to the vehicle body skeleton being bent rearward at the corner portion 3 is easily suppressed, so that the occupant can be protected, and the same operation and effect as those of the above-described embodiments can be obtained. be able to.

  As in the fourth embodiment shown in FIG. 5 instead of the reinforcing member 12 in the third embodiment, one end of the substantially plate-like reinforcing member 30 is welded to the lower inner surface of the inner panel 6 at the rear of the vehicle. May be configured so that the other end thereof crosses the hollow cross section 7 and faces the upper front surface of the phosphorus hose 5 with a small gap therebetween.

  Further, in the fifth embodiment shown in FIG. 6, a substantially polygonal hollow section 7 is formed by joining the upper part 6 'of the inner panel 6 to the upper end of the phosphorus hose 5 in the third embodiment, and the other structure is obtained. Is equivalent to the third embodiment, and can achieve the same operation and effect as the third embodiment.

FIG. 2 is a schematic side view of a main part according to the first embodiment of the present invention. FIG. 2 is an enlarged cross-sectional view taken along the line II-II of FIG. 1. FIG. 4 is a cross-sectional view corresponding to FIG. 2 in a second embodiment of the present invention. FIG. 7 is a cross-sectional view corresponding to FIG. 2 in a third embodiment of the present invention. FIG. 10 is a cross-sectional view corresponding to FIG. 2 in a fourth embodiment of the present invention. FIG. 13 is a transverse sectional view corresponding to FIG. 2 in a fifth embodiment of the present invention. FIG. 3 is a cross-sectional view corresponding to FIG. 2 in the related art.

Explanation of reference numerals

Reference Signs List 1 front pillar 2 roof rail 3 corner 7 substantially hollow hollow section 8, 14, 16 ridge 12, 20, 30 reinforcing member

Claims (4)

The front pillar and the roof rail are connected at a corner, and the corner forms a substantially polygonal hollow cross section, and has a reinforcing member extending from the inside of the front pillar, through the corner, and into the roof rail, The reinforcing member is fixed to the interior surface of the corner portion on the passenger compartment side, extends to the vehicle exterior side of the hollow cross section across the hollow cross section, and is configured to face the interior exterior surface of the corner portion with a small gap. Body frame structure. The vehicle body skeleton structure according to claim 1, wherein the reinforcing member has a mountain-shaped cross section protruding toward the outside of the vehicle. 3. The vehicle body skeleton structure according to claim 1, wherein the reinforcing member forms a closed cross section in the hollow cross section. The vehicle body frame structure according to any one of claims 1 to 3, wherein the reinforcing member extends from the vicinity of the ridge on the inner surface of the vehicle interior side of the corner to the vicinity of the ridge of the inner surface of the vehicle outside of the corner.

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