滚针式超越离合器在安全带上的设计与应用
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摘要
主动式安全带是带有驱动马达、传动系统、离合器等的部件,能根据信号主动回收织带,从而实现震动提醒、碰撞前防护等功能的新型安全带。目前主动式安全带中的离合器主要为齿式离合器,存在离合冲击大、噪声大、输出扭矩不稳定、齿尖对碰风险高等问题。为提高性能,需要一种传递扭矩大、离合冲击小的新型离合器。从设计角度讨论滚针式超越离合器在主动式安全带上的设计与应用,并针对离合面为对数螺旋线的滚针式超越离合器的螺旋线进行参数设计,讨论其具体计算方法并总结公式。该方法与公式可广泛适用于驱动轴与从动轴需要完全脱离的双向或单项超越离合器设计。
The active seatbelt is a new type seatbelt with drive motor,transmission system,clutch and other components,which can actively retract the webbing according to signals,to realize functions like vibration reminding or pre-crash protection. At present,the clutch in the active seatbelt is mainly a tooth clutch,and there are problems such as big impact of clutch,big noise,unstable output torque,and high risk of tooth tip collision. To improve its performance,a new type of clutch with large transfer torque and small clutch impact was needed. The design and application of the needle-type overrunning clutch on the active seatbelt were discussed. The specific design calculation method was summarized for the parameters of the needle-type overrunning clutch with the logarithmic spiral. The methods and formulas presented can be widely applied to bidirectional or one-way overrunning clutch which needs to be completely separated from the driving shaft and the driven shaft.
The active seatbelt is a new type seatbelt with drive motor,transmission system,clutch and other components,which can actively retract the webbing according to signals,to realize functions like vibration reminding or pre-crash protection. At present,the clutch in the active seatbelt is mainly a tooth clutch,and there are problems such as big impact of clutch,big noise,unstable output torque,and high risk of tooth tip collision. To improve its performance,a new type of clutch with large transfer torque and small clutch impact was needed. The design and application of the needle-type overrunning clutch on the active seatbelt were discussed. The specific design calculation method was summarized for the parameters of the needle-type overrunning clutch with the logarithmic spiral. The methods and formulas presented can be widely applied to bidirectional or one-way overrunning clutch which needs to be completely separated from the driving shaft and the driven shaft.
引文
[1]欧洲经济委员会.安全带及成人约束系统:ECE R16[S].2008.