| 摘要 |
Drive device (1) for an electric bicycle, comprising a drive housing (7) in which a hollow shaft (3) is mounted, said hollow shaft being connected to a sprocket wheel of a chain drive for the electric bicycle, comprising a pedal crankshaft (2) connected at both ends to pedal cranks, wherein said pedal crankshaft is arranged coaxially with the hollow shaft (3) and can be coupled to said hollow shaft (3), and comprising an electric motor (4), the output shaft of which can be coupled to the hollow shaft (3) via a traction gear mechanism (6) constructed as a belt drive with a flat belt, a toothed belt or a V-belt as a flexible traction means (60) or as a chain drive with a single or double roller chain as a flexible traction means (60). The traction gear mechanism (6) can form a multi-stage transmission (5, 6) for reducing the speed of the electric motor (4) with a straight-toothed or helical-toothed spur gear or planetary gear mechanism (5). |
