Electric traction drives

摘要

Inventive embodiments are directed to components, subassemblies, systems, and/or methods for electric traction drives employing a continuously variable transmission (CVT) having a variator provided with a plurality of tilting traction planets and opposing traction rings. In one embodiment, an electric traction drive is provided with an electromotive device configured to transfer power to or from a traction sun of a CVT. In other embodiments, an electric traction drive is provided with an electromotive device that couples to certain components of a CVT such as a traction ring, a carrier assembly, and a main axle. Various inventive shifting assemblies having shift cams and shift cam cages can be used to facilitate adjusting the transmission speed ratio of a CVT. Various related devices include embodiments of, for example, a power input apparatus, a speed ratio shifter, a shift cam actuator, a shift nut, and a carrier assembly configured to support the tilting traction planets.

主权项

1. A vehicle comprising:
an electric traction drive on a main axle, the main axle defining a longitudinal axis, the electric traction drive comprising
a plurality of traction planets distributed radially about the longitudinal axis, each traction planet rotatable about a tiltable axis,a first traction ring and a second traction ring in contact with the plurality of traction planets, the plurality of traction planets interposed between the first traction ring and the second traction ring,a rotatable traction sun mounted on the main axle and positioned radially inward of and in contact with each of the plurality of traction planets,a traction sun drive shaft coupled to the traction sun, an electric rotor assembly coupled to the traction sun drive shaft,
a drive shaft operably coupled to the first traction ring, the drive shaft adapted to transfer power to the first traction ring,a field that is rotationally fixed to the second traction ring; anda main shell comprising one or more flanges for facilitating the transfer of torque to a load, wherein the main shell is used to drive a wheel, and wherein the one or more flanges is adapted to couple to a plurality of spokes of the wheel.