| 摘要 |
A control mechanism (800) for setting a transmission ratio between a traction means (812), in particular chain, and a wheel set that is rotatable about a wheel axle and includes two or more wheel blades (810, 820, 830), in particular sprocket blades, adjusts the wheel rim sectors relative to a fixed plane of the traction means in a direction transverse to the plane of alignment. At least one of the wheel blades is composed of a plurality of independently adjustable wheel rim sectors (802, 803). By means of a control component (807) mounted decoupled from a rotary movement of the wheel set, a plurality of co-rotating thrust elements (804, 805) are each displaced via rotation-free couplings between a first and a second position at least in the axial direction, wherein each of the wheel rim sectors is connected in a rotationally fixed manner to a respectively associated thrust element. The first position of a thrust element corresponds to the position of the associated wheel rim sector outside the plane of alignment, whereas a thrust element located in the second position exerts on the respective wheel rim sector, at least as long the latter is outside the plane of the traction means, a force for displacing the respective wheel rim sector into the plane of alignment, thus shifting the same into the plane. |
| 主权项 |
1. A control mechanism (200, 300, 500, 600, 660, 700, 800, 900) for setting a transmission ratio between a traction means (206, 309, 512, 606, 706, 812, 912) and a wheel set that is rotatable about a wheel axle and includes two or more wheel blades (202, 220, 230; 310, 320, 330; 510, 520; 610, 620, 630; 710, 711, 712; 810, 820, 830) which can facultatively be wrapped around by the traction means, wherein at least one of the wheel blades is composed of a plurality of independently adjustable wheel rim sectors (203, 204; 301, 302; 501; 621, 631; 661; 711, 712; 802, 803; 902), wherein the control mechanism causes the adjustment of the wheel rim sectors relative to a fixed plane (“plane of alignment”) in which the traction means wraps around the wheel set, in a direction substantially transverse to the plane of alignment,
characterized by
at least one control component (212; 304; 504a, 505; 730; 807; 908) mounted decoupled from a rotary movement of the wheel set,a plurality of co-rotating thrust elements (216; 306; 504b; 701; 804, 805; 906), wherein a thrust element is each associated to the wheel rim sectors and each of the wheel rim sectors is connected to the respectively associated thrust element so as to be rotationally fixed relative to the rotation about the wheel axle, wherein the thrust elements are each displaceable via rotation-free couplings between a first and a second position by the at least one control component at least in the axial direction, wherein the first position of a thrust element corresponds to the position of an associated wheel rim sector outside the plane of alignment, whereas a thrust element being in the second position exerts on the respective wheel rim sector, at least as long the latter is outside the plane of alignment, a force for displacing the respective wheel rim sector into the plane of alignment. |
