The invention relates to a two-gear speed changing power system of an electric automobile. The two-gear speed changing power system comprises a driving motor, a differential mechanism, a right half shaft and a left half shaft, and further comprises a planetary gear speed reducing mechanism, a synchronizer and two sets of wheel rim speed reducing mechanisms, wherein the planetary gear speed reducing mechanism and the synchronizer are located in a shell of the driving motor to form an integrated structure. The two-gear speed changing power system has extremely high integration degree; the wheel rim speed reducing mechanisms are used as the final stage of a transmission chain of a main speed reducing mechanism so that the load of the front-stage part of the transmission chain is greatly reduced and the part size of the front-grade part of the transmission chain is reduced, and a miniaturization and light-weight principle is met; a rotor rotary shaft of the driving motor is directly connected with a speed changer gear so that coaxial tolerance caused by matched installation is avoided; the quantities of duplex planetary gears and differential mechanism driving gears are the same and the duplex planetary gears and the differential mechanism driving gears are arranged around the central line at equal angles; the whole structure is centrally symmetrical, the weight distribution is uniform, the dynamic balance property is good, the transmission efficiency is higher, and the vibration noise condition is better.
Two-gear speed changing power system of electric automobile
12.08.2015
Patent
Elektronische Ressource
Englisch
IPC: | B60K Anordnung oder Einbau von Antriebseinheiten oder von Kraft- bzw. Drehmomentübertragungen in Fahrzeugen , ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES |
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