| 摘要 |
A universal central assembly of a bicycle consisting of pedals with pedal cranks, a quick-clamping screw, a hollow cylindrical journal and a shaft is characterised in that the journals (1, 1') of the pedal cranks inserted in the hollow of the shaft (2) with a spring are equipped with a quick-clamping screw (3). The quick-clamping screw (3) is connecting the left journal with the right journal (1, 1') of the pedal cranks slidingly, and together with the shaft (2) rotationally. The journals (1, 1') of the pedal cranks are coupled through a quick clamping screw (3) in the axis of the hollow of the cylindrical journal (4).
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