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1. 发明授权

US4099683A Constant pull safety belt retracting mechanism 失效
公开(公告)号：US4099683A
公开(公告)日：1978-07-11
申请号：US764945
申请日：1977-02-02
申请人： Richard C. Stouffer , John Adams
发明人： Richard C. Stouffer , John Adams
IPC分类号： B60R22/44 , A62B35/02 , B65H75/48
CPC分类号： B60R22/44 , B60R2022/4413
摘要： A safety belt retracting mechanism having constant pull includes a rotatable spool for storing the belt inside a housing. A conventional, positive coefficient of force spring inside the housing applies a retracting force to the spool and belt as the belt is pulled by the occupant. The spring is coupled between the housing and spool through a variable gear ratio gear train having a negative coefficient of force transfer characteristic. The negative transfer characteristic of the gear train compensates for the positive characteristic of the spring to provide constant pull to the belt between fully retracted and fully protracted belt positions. Three embodiments of the invention are disclosed. In one embodiment, the changing gear ratio is produced by a pair of oppositely oriented cone gears connected respectively to the spring and to a spindle supporting the belt spool. The cone gears are coupled together with a traversing pinion that lowers the force gear ratio of the cones as the belt is protracted by the occupant. In another embodiment, an approximately semicircular sector gear is mounted eccentrically on a shaft whereby the effective radius of the sector gear varies as a function of sector angle. The spindle is coupled to the spring (1) through a small radius portion of the sector gear when the belt is fully retracted, and (2) through progressively larger radius portions as the belt is protracted by the occupant providing the changing gear ratio. In a third embodiment, the gear train includes a pair of enmeshing sector gears and a number of intermediate spur gears. Each of the sector gears has an elliptical surface portion. When the belt is in a fully retracted position, the sector gears are oriented with the major axes thereof coincident to each other. As the belt is protracted, the enmeshing sector gears are each rotated by a maximum of 90.degree.. Output shafts are attached to the sector gears at corresponding sides thereof and on the major axes. A continuously decreasing gear ratio provided by the elliptical surface portions of the sector gears as the belt is protracted produces the negative coefficient of force transfer characteristic of the gear train.

2. 发明授权

US4097003A Constant pull safety belt retracting mechanism 失效
标题翻译：恒拉安全带回缩机构
公开(公告)号：US4097003A
公开(公告)日：1978-06-27
申请号：US763779
申请日：1977-01-31
申请人： Richard C. Stouffer , Jerome W. Schotthoefer
发明人： Richard C. Stouffer , Jerome W. Schotthoefer
IPC分类号： B60R22/44 , A62B35/02 , B65H75/48
CPC分类号： B60R22/44 , B60R2022/4413
摘要： A safety belt retracting mechanism having constant pull includes a spindle supporting a rotatable spool for storing the belt within a housing. A conventional, positive coefficient of force spring inside the housing applies a retracting force to the spool and belt as the belt is pulled by the occupant. The spring is coupled between the housing and spool to a gear train having a negative coefficient of force transfer characteristic. The negative transfer characteristic of the gear train is caused by a changing gear ratio which compensates for the positive force characteristic of the spring to provide constant pull to the belt. The changing gear ratio is produced by a spiral-shaped gear coupled to a constant radius pinion formed on one end of the spindle. The spiral-shaped gear is formed on the hub of a containment member enclosing the spring. The containment member is mounted to the housing on a pivot arm. The arm is resiliently biased by a spring to maintain the spiral-shaped gear in enmeshment with the pinion during gear rotation.
摘要翻译：具有恒定拉力的安全带回缩机构包括支撑可旋转线轴的心轴，用于将皮带储存在壳体内。壳体内的常规的正的系数弹簧在乘员被拉动带时向卷轴和皮带施加缩回力。弹簧在壳体和线轴之间连接到具有负的力传递特性的齿轮系。齿轮系的负传递特性是由变化的传动比引起的，齿轮比补偿了弹簧的正向力特性，以提供持续的拉力。变速传动比由联接到形成在主轴一端的恒定半径小齿轮的螺旋形齿轮产生。螺旋形齿轮形成在包围弹簧的容纳构件的轮毂上。容纳构件在枢轴臂上安装到壳体。臂由弹簧弹性偏压，以保持螺旋形齿轮在齿轮转动期间与小齿轮啮合。

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