§ 393.89 Buses, driveshaft protection.
发布02-19
生效03-23
摘要总结AI 辅助解读
该条款为美国联邦法规第49篇（交通）中关于客车传动轴防护的技术标准。规定若客车乘客舱地板下方有纵向延伸的传动轴，且末端存在滑动连接装置，必须安装至少一个护罩或支架以防止断裂时发生甩动；若传动轴包含在扭矩管内则无需此装置。此为车辆制造与改装的静态技术规范，非动态贸易合规政策。
Any driveshaft extending lengthways under the floor of the passenger compartment of a bus shall be protected by means of at least one guard or bracket at that end of the shaft which is provided with a sliding connection (spline or other such device) to prevent the whipping of the shaft in the event of failure thereof or of any of its component parts. A shaft contained within a torque tube shall not require any such device.
[33 FR 19735, Dec. 25, 1968, as amended at 53 FR 49402, Dec. 7, 1988]