US 6,981,930 B2
Integrated electric motor and traction drive
Xiaolan Ai, Massillon, Ohio (US); and Geoffrey Bishop, Hartville, Ohio (US)
Assigned to The Timken Company, Canton, Ohio (US)
Filed on Dec. 11, 2003, as Appl. No. 10/733,035.
Claims priority of provisional application 60/433331, filed on Dec. 13, 2002.
Prior Publication US 2004/0121601 A1, Jun. 24, 2004
Int. Cl. F16H 57/08 (2006.01)
U.S. Cl. 475—335 11 Claims
OG exemplary drawing
 
1. An integrated motor and traction drive comprising:
a motor supplying power at a high angular velocity, the motor comprising a stator, a rotor which revolves in the stator at a high angular velocity, and a sun roller affixed to the rotor having a first raceway;
a traction drive for receiving power at a high angular velocity and delivering the power at a lesser angular velocity, the traction drive comprising a carrier, an outer ring member having a fourth raceway eccentric to the first raceway of the sun roller and an output shaft for delivering power at a lesser angular velocity, and a loading planetary roller supported by the carrier having a third raceway that engages with the first raceway of the sun roller and the fourth raceway of the outer ring forming a converged wedge for transferring power between the sun roller and the outer ring;
a base plate having a pinhole for supporting the loading planetary roller, a third bore for supporting the sun roller, pinholes for supporting the supporting planetary rollers, and islands; and
a cover plate affixed to the base plate having a pinhole for supporting the loading planetary roller and a hole for hosting the sun roller.