Rear top girder structure of back door vehicle
A roof beam and roof beam technology is applied in the directions of the superstructure, the subassembly of the upper structure, the vehicle parts, etc., and can solve the problems of insufficient rigidity of the rear door opening, reduction of the torsional rigidity of the vehicle body, and deformation of the rear door opening, etc. Achieve the effect of omitting the top beam, improving bending rigidity and improving rigidity
Active Publication Date: 2009-07-29
NISSAN MOTOR CO LTD
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Problems solved by technology
[0005] However, in the above-mentioned conventional example, as mentioned above, since the upper roof beam is not used, the rigidity between the left and right reinforcements is partially lowered at the connection portion between the exterior members on the vehicle body side and the reinforcement, and as a result, sufficient rigidity cannot be obtained. Problems with the rigidity of the rear door opening and the torsional rigidity of the vehicle body
[0006] That is, it is necessary to increase the rigidity of each corner of the opening to prevent deformation of the rear door opening caused by the torsional input force of the vehicle body. When a torsional input force is applied, there is a danger of bending due to stress concentration in the same part, and there is a danger of deformation in the opening of the rear door
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[0019] Embodiments of the present invention will be described below with reference to the drawings.
[0020] The structure of the rear roof beam of the rear door car of this embodiment corresponds to the inventions described in claims 1-7.
[0021] figure 1 Showing the structure of the rear roof beam of the rear door car of this embodiment, it is a perspective view seen from the rear side of the upper part of the vehicle showing the state before the roof is installed, figure 2 is in figure 1 A longitudinal sectional view of the A-A line in the state where the roof is installed on the rear roof beam structure of , image 3 yes figure 1 A perspective view of the longitudinal section of the A-A line, Figure 4 is in figure 1 B-B line longitudinal sectional view of the state where the roof is installed on the rear roof beam structure of , Figure 5 is in figure 1 The perspective view of the longitudinal section of the B-B line in the state where the roof is installed on th...
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A rear roof beam structure of a rear door car, in which two left and right reinforcements (5) are formed so that the central part of the body (51) protrudes upward in a U-shaped cross-section, from the rear roof beam (4) to the left and right reinforcements (5) at least in the middle part is formed with continuous ribs (41), (52) along the vehicle width direction, while the ribs (52) of the left and right reinforcements (5) are formed to be aligned with the left and right reinforcements (5). ) is in a state where the roughly U-shaped main body portion (51) is continuous. By adopting the invention, the upper roof beam is omitted, and sufficient rigidity of the opening of the rear door and torsional rigidity of the vehicle body can be obtained.
Description
technical field [0001] The invention relates to a rear roof beam structure of a rear door vehicle. Background technique [0002] In general, the rigidity of the rear door opening of a rear door vehicle and the torsional rigidity of the vehicle body are one of the important indicators of acoustic vibration, handling stability, and durability of the vehicle body. Therefore, it is very important to increase the rigidity around the rear door opening, which greatly affects the rigidity of the rear door opening and the torsional rigidity of the vehicle body. However, in order to increase the rigidity, there is a problem that it conflicts with the requirement of reducing the weight of the vehicle body. [0003] Therefore, as a solution to the above-mentioned problems, a structure has been proposed (for example, refer to Patent Document 1-Japanese Patent Laid-Open No. 182176), which is in the structure of the rear roof beam of the rear door car. Join the left and right side ends o...
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IPC IPC(8): B62D25/00
Inventor 二户史
Owner NISSAN MOTOR CO LTD