The invention provides a mechanical
automatic transmission of an electric automobile provided with an overrun
clutch, and belongs to the technical field of transmission of electric automobiles. The transmission comprises a transmission
control system, a variable transmission mechanism, a gear shift operating mechanism and a reverse gear operating mechanism, wherein the variable transmission mechanism is provided with the overrun
clutch and performs two-stage transmission; and the gear shift operating mechanism comprises a centrifugal gear shift operating mechanism and a
synchronizer gear shift mechanism, the centrifugal gear shift operating mechanism adopts a mechanical structure, detects a speed of the automobile through
gear transmission and produces
centrifugal force, and the
centrifugal force is combined with spring return force, so that mechanical automatic speed changing is realized. According to the mechanical
automatic transmission, performance requirements for a driving motor are reduced, and the efficiency of the driving motor and the dynamic property and economy of the whole automobile are improved; an
electric control gear shift mechanism is omitted and replaced with the mechanical gear shift mechanism, so that the production cost is reduced, and the
system stability is improved; and simultaneously, the overrun
clutch and the
synchronizer gear shift mechanism are utilized, so that the power failure time during the gear shift process is shortened, the transmitted torque of the transmission is increased, and the
system reliability is improved.