Electric power steering apparatus

Details Electric power steering apparatus Electric power steering apparatus

2007-01-12

2011-12-13

Hannon, Thomas R (Department: 3656)

Machine element or mechanism

Gearing

Follow-up mechanism

C074S409000

Reexamination Certificate

active

08074531

ABSTRACT:
An electric power steering apparatus comprises a transmission mechanism having a drive gear and a driven gear. One end of the drive gear is supported by a bearing hole in a housing through a bearing and a curved plate spring. The curved plate spring comprises a main body surrounding the bearing and at least one crank-shaped elastic tongue supported by at least one of ends of the main body. A recess formed on an inner peripheral surface of the bearing hole has a bottom and a pair of inner wall surfaces opposed to each other in the circumferential direction of the bearing hole. A relief portion for avoiding contact with a connection portion of the elastic tongue is formed between at least one of the inner wall surfaces and the inner peripheral surface of the bearing hole. A boundary between the relief portion and the inner peripheral surface of the bearing hole is engaged with the main body of the curved plate spring, to restrict the movement of the main body in the circumferential direction.

REFERENCES:
patent: 2004/0164495 (2004-08-01), Oldenburg
patent: 2004/0182188 (2004-09-01), Nakamura et al.
patent: 2007/0158131 (2007-07-01), Iwasa et al.
patent: 1 714 851 (2006-10-01), None
patent: 1731404 (2006-12-01), None
patent: 9-273560 (1997-10-01), None
patent: 2004-306898 (2004-11-01), None
patent: 2005-254864 (2005-09-01), None
patent: 2006-8008 (2006-01-01), None
patent: WO 2005/073054 (2005-08-01), None
patent: WO 2005073054 (2005-11-01), None
An English-language Abstract of JP 2005-254864 (Sep. 22, 2005).

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