Worm gear mechanism and electric power steering apparatus...

Details Worm gear mechanism and electric power steering apparatus... Worm gear mechanism and electric power steering apparatus...

2004-04-13

2008-05-27

Joyce, Willam C (Department: 3682)

Machine element or mechanism

Gearing

Backlash take-up

C074S3880PS, C074S425000

Reexamination Certificate

active

07377194

ABSTRACT:
Worm gear mechanism is provided which includes a worm, a torque-transmitting worm wheel and an auxiliary worm wheel. In order to secure a sufficient face width of the torque-transmitting worm wheel, a pitch diameter of the auxiliary worm wheel is set to be greater than a pitch diameter of the torque-transmitting worm wheel. Thus, undesired backlash can be eliminated by the auxiliary worm wheel meshing with the worm with a different meshing phase from the torque-transmitting worm wheel.

REFERENCES:
patent: 5934144 (1999-08-01), Marinkovic
patent: 6354395 (2002-03-01), Cheng et al.
patent: 544 445 (1932-02-01), None
patent: 1 546 785 (1975-05-01), None
patent: 2001-355700 (2001-12-01), None
patent: 2002-37100 (2002-02-01), None

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