Motor vehicles – Steering gear – With electric power assist
Patent
1998-12-04
2000-12-26
Swann, J. J.
Motor vehicles
Steering gear
With electric power assist
74409, 74396, 74 8913, 74 8915, 74499, 180443, B62D 504
Patent
active
061644072
ABSTRACT:
A vehicle steering apparatus (10) for turning steerable wheels (44) of a vehicle comprises a manually rotatable input member (12) to which steering torque is applied, an output member (34) rotatable to effect turning of the steerable wheels (44) of the vehicle, and an electric motor (102) for providing a drive force to rotate the output member (34) as a function of the steering torque applied to the input member (12). The electric motor (102) includes a motor shaft (100) having an axis of rotation (104). First and second meshing gears (54 and 56) transmit the drive force of the electric motor (102) to the output member (34). The first gear (54) is rotatable with the output member (34) and the second gear (56) is rotatable with the motor shaft (100). An adjusting mechanism (86, 122) adjusts backlash between the first and second gears (54 and 56). The adjusting mechanism (86, 122) includes a mounting mechanism (70, 108) for adjustably mounting the electric motor (102) and the second gear (56) relative to the first gear (54). The mounting mechanism (70, 108) includes eccentric surfaces (80, 120) for shifting the axis of rotation (104) of the motor shaft (100) and the second gear (56) relative to the first gear (54).
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Handbook of Mechanical Power Drives, 3.sup.rd Edition, pp. 410, 411 XP-002132751.
Shriver J. Allen
Swann J. J.
TRW Inc.
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