Multiplication of the hub gear

Abstract

Drive arrangement for a bicycle, with a hub gear (transmission) (3-5-7-8-11-14-18 automatic (3x2), endless hub) and with a triple crankset, for use on a crank arm (16) of the bicycle. The tensioning device (40) has a sprocket (R) that is rotatable about the same axis of rotation as the axis of rotation of the hub gear, wherein no further sprocket is rotatable about the axis of rotation outside the hub of the hub gear as part of the drive arrangement. For this purpose, the combination of the hub gear (transmission) on the rear wheel with a triple crankset with three sprockets (6)(8)(10), each with a different number of teeth and diameters (outer circumference), which can be operated via a mechanism (tensioning derailleur) (26) with the desired gear ratio.

Description

[0001] The invention relates to a drive arrangement for a bicycle, with a crank drive which transmits a driving force from three chainrings 6, 8, 10 located near the crank drive to a sprocket near the rear wheel by means of an endlessly rotating traction element, such as a chain 22, and sets a rear wheel of the bicycle in rotation for propulsion. The drive arrangement for the bicycle consists of an internal gear hub (11-speed; 3-5-7-8-11-14-18 - automatic (3x2), endless hub), a triple crankset for use on a crank arm 16 of the bicycle, and a tensioning device 40 with a sprocket that is rotatable about the same axis of rotation R of the internal gear hub, wherein no further sprocket is rotatably present outside the hub of the internal gear hub as part of the drive arrangement.

[0002] The gear system is a hub gear, in which the gear components are located in the rear wheel hub of the bicycle. In addition, there is a derailleur system at the front, in which sprockets – with varying numbers of teeth and outer diameters – are arranged on the chainrings 6, 8, and 10 near the crank drive. A derailleur 26 allows the chain 22 to be guided over one of the sprockets, depending on the desired gear ratio.

Claims

[] Drive arrangement for a bicycle, with a hub gear (gearbox) (3-5-7-8-11-14-18 automatic (3x2), endless hub) and with a triple crankset, for use on a pedal crank (16) of the bicycle. The clamping device (40) with a pinion (R) that can rotate about the same axis of rotation as the axis of rotation of the hub gear, wherein outside the hub of the hub gear there is no further pinion that can rotate about the axis of rotation as part of the drive arrangement. For this purpose, the hub gear (gearbox) on the rear wheel is combined with a triple crankset with three pinions (6)(8)(10), each with a different number of teeth and diameters (outer circumference), which can be driven via a mechanism (clamping front derailleur) (26) with the desired gear ratio.

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