The invention discloses an external rotor motor cyrtoconic swing type self-adaption
automatic variable speed drive
assembly of an
electric motor car. The external rotor motor cyrtoconic swing type self-adaption
automatic variable speed drive
assembly comprises a
drive motor, a box body, a transmission shaft, a slow
gear transmission mechanism and a mechanical intelligent self-adaption variable speed
assembly. An annular sunk portion is formed in the axial end face of an outer ring of an overturn
clutch of the slow
gear transmission mechanism, an inner ring is arranged in the annular sunk portion in a rotating and matched mode, and a meshing space is formed between an outer circle of the inner ring and the inner wall of the radial outer side of the annular sunk portion. The slow-
gear transmission mechanism outputs power and locks a variable speed elastic element through a swing type end face
cam meshing pair. By means of the
automatic variable speed drive assembly, the problem that the transmission error is amplified on the overturn
clutch is avoided, the overall stability of the overturn
clutch is guaranteed, stable supporting is still guaranteed after long period operation of a speed changer, operation
noise is lowered, operation comfort is guaranteed, transmission efficiency is improved, and thus
energy consumption is lowered; the service life is further prolonged, operation accuracy is improved, and the automatic variable speed drive assembly is applicable to overloading and high-speed use environments.