| 摘要 |
PURPOSE: Structure for reducing the vibration of a roof of a bus is provided to increase the frequency of an upward/downward vibration mode and to enhance reinforcing effect by installing a support bar between a stay structure and a cantilever rail. CONSTITUTION: A stay structure(32) is installed under a roof bow(30) of a bus. A cantilever rail(34) is installed on the side of the roof bow. A duct(36) is installed on the side of the stay structure. A window pillar(40) is installed at a lower portion of the cantilever rail. A support bar(38) is installed between the stay structure and the cantilever rail to increase the strength of a roof. A through groove penetrated with the support bar is formed in the duct. The stay structure is made of an aluminum cast-iron product. By connecting the stay structure with the support bar, the bending rigidity of the roof is strengthened and the frequency of an upward/downward vibration mode is increased.
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