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2. 发明授权

US06487933B2 Pedal-operated drive unit for bicycles or the like 失效
标题翻译：用于自行车等的踏板操作的驱动单元
公开(公告)号：US06487933B2
公开(公告)日：2002-12-03
申请号：US09864221
申请日：2001-05-25
申请人： Giacomo Orioli , Zeno Zani
发明人： Giacomo Orioli , Zeno Zani
IPC分类号： G05G114
CPC分类号： B62M3/04 , Y10T74/2164 , Y10T74/2165 , Y10T74/2167
摘要： The unit comprises two variable-length pedal cranks (20) having a common rotation pin (21) of transverse axis (A), and a mechanism (34, 35, 36) for varying the length of the two pedal cranks (20) on the basis of their angular position; the position of the axes of the pedals (25) in the vertical plane of projection defines, as the angular position of the pedal cranks (20) varies, an endless closed curve (F) about a reference axis (R) which is displaced by an angle of about 15 degrees forwards from the axis (N) passing through the center of the seat (11) of the bicycle and intersecting the axis (A) of the pin (21). The endless curve (F) comprises an upper portion, extending through at least 60 degrees of rotation of the pedal crank about the upper point of its intersection (Ta) with the reference axis (R), in which the length of the pedal crank (20) is less than the mean value (LM) thereof, in the remaining part of the endless curve (F) the length of the pedal crank being greater than the mean value (LM); the point in which the length of the pedal crank reaches its maximum value (Lmax) is in a position between 40 and 120 degrees after the upper point of intersection (Ta)
摘要翻译：该单元包括具有横向轴线（A）的公共旋转销（21）的两个可变长度踏板曲柄（20），以及用于改变两个踏板曲柄（20）的长度的机构（34,35,36）其角度位置的基础; 当踏板曲柄（20）的角位置变化时，踏板（25）的轴线在垂直平面上的位置定义围绕参考轴线（R）移动的环形闭合曲线（F）从穿过自行车的座椅（11）的中心并与销（21）的轴线（A）相交的轴线（N）向前倾斜大约15度的角度。无端曲线（F）包括上部，其沿着与基准轴线（R）相交的脚踏曲柄的至少60度的旋转角度，延伸到其交点（Ta）的上部点，其中踏板曲柄 20）小于其平均值（LM），在无限曲线（F）的剩余部分中，踏板曲柄的长度大于平均值（LM）; 踏板曲柄的长度达到其最大值（Lmax）的点在上交点（Ta）之后的40和120度之间的位置，

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