Resin gear

Details Resin gear Resin gear

2011-04-12

2011-04-12

Johnson, Vicky A (Department: 3656)

Machine element or mechanism

Gearing

Teeth

Reexamination Certificate

active

07921745

ABSTRACT:
Noise can be effectively reduced without rotative power transmission accuracy being compromised.In a tooth2of a resin gear1, a tooth face that is a predetermined area from a tooth crest8towards a tooth root10side serves as a tooth profile modification area11. A tooth surface excluding the tooth profile modification area11serves as an involute profile area12. The tooth profile modification area11includes a linear standard profile portion14formed by an involute curved line from the tooth crest8of the tooth towards the tooth root10side and a profile modification portion16in which a tooth thickness gradually and smoothly decreases from the standard profile portion14along a tooth width direction and the tooth thickness gradually and smoothly decreases from a tooth root end side15towards the tooth crest8. In the tooth profile modification area11, a contacting section becomes elastically deformed as a result of the resin gear coming into contact with a meshing mating gear. A tooth width direction length of the contact surface gradually increases from a minute, point-like width to a full tooth width from the tooth crest8side towards the tooth root10side.

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patent: 2008/0302198 (2008-12-01), Takumori
patent: 08-312755 (1996-11-01), None

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