An electronic parking mechanism in an electric automobile speed reducer comprises a driving stepping motor and a transmission pair, wherein the transmission pair consists of a parking pawl and a parking ratchet wheel; the electronic parking mechanism is provided with a pawl driving cam mechanism, which comprises a driving wheel, a driven cam and an arc-shaped spring between the driving wheel and the driven cam; the lug boss of the driving wheel extends into the groove of the driven cam to transmit the torque and the turning angle which are provided by the output shaft of the driving stepping motor, and the groove serves as a movement slideway for the lug boss; the arc-shaped spring is mounted in the groove of the driven cam; one end of the arc-shaped spring is contacted with the side surface of the lug boss of the driving wheel to transmit the torque and the turning angle which are provided by the output shaft of the driving stepping motor; and the other end of the arc-shaped spring is located in the groove of the driven cam and contacted with the side surface of the groove to push the driven cam to rotate and then push the parking pawl to serve a parking function. The electronic parking mechanism is simple in structure, very simple to operate, high in working efficiency and good in manufacturability, and can accurately transmit the torque and the turning angle of the driving stepping motor, conveniently store driving energy and reliably serve the parking function.
Electronic parking mechanism in electric automobile speed reducer
2015-04-22
Patent
Elektronische Ressource
Englisch
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