| 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, 660700, 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 wheel rim sectors (203, 204; 301, 302; 501; 621, 631; 661; 711, 712; 802, 803; 902), wherein the wheel blades have different circumferential radii, another wheel blade (202, 310, 510, 610, 710, 810) of the two or more wheel blades having the smallest circumferential radius and being undivided by having no independently adjustable sectors, the undivided wheel blade comprises at least one opening, through which extend one of at least one thrust element (504b, 701), at least one connection element (503, 702) associated to a thrust element, or both the at least one thrust element and the at least one connection element, the at least one connection element (503, 702) serving to connect the thrust element to the respective wheel rim sector (501, 721), and the control mechanism causes the adjustment of the wheel rim sectors relative to a fixed plane of alignment in a direction substantially transverse to the fixed plane of alignment, the fixed plane of alignment extending along the planar face of the another wheel blade, the control mechanism having
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 the thrust elements are 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 in an axial direction between a first position and a second position by couplings of the at least one control component, wherein the couplings are rotation-free in that the couplings do not rotate with the rotary movement of the wheel set, wherein the first position of each thrust element corresponds to an associated wheel rim sector being outside the fixed plane of alignment, whereas the thrust element being in the second position exerts on the associated wheel rim sector, at least as long the associated wheel rim sector is outside the fixed plane of alignment, a force for displacing the associated wheel rim sector into the fixed plane of alignment, the wheel rim sectors are independently adjustable relative to each other via the respectively associated thrust element. |
