Title:
TOOTHED GEAR, REDUCTION GEAR MECHANISM AND ELECTRIC POWER STEERING DEVICE
Document Type and Number:
Japanese Patent JP2003207031
Kind Code:
A
Abstract:
To restrain abrasion of a tooth surface adapted to hold lubricant in a dent for holding the lubricant.
A long groove 2 in provided in the tooth trace direction on the tooth surface 12 between a central part 12a in the neighborhood of a pitch circle Pw and a tooth bottom 13 and/or the tooth surface 12 between the central part 12a and an addendum 14, the lubricant such as grease, etc., held in the groove 2 is supplied to the central part 12a by centrifugal force at the time of rotation. Thus, it is realized to improve lubricity, to restrain abrasion of the tooth surface and to improve durability of a tooth.
Inventors:
KAWANABE AKIHISA
MURAKAMI HIROAKI
TAKIMOTO MANABU
MURAKAMI HIROAKI
TAKIMOTO MANABU
Application Number:
JP2002005366A
Publication Date:
July 25, 2003
Filing Date:
January 11, 2002
Export Citation:
Assignee:
KOYO SEIKO CO
International Classes:
B62D5/04; F16H1/16; F16H55/08; F16H55/22; (IPC1-7): F16H55/22; B62D5/04; F16H1/16; F16H55/08
Domestic Patent References:
| JP2000052145A | 2000-02-22 | |||
| JPH11182652A | 1999-07-06 | |||
| JPH058111U | 1993-02-05 | |||
| JP2000043739A | 2000-02-15 | |||
| JPH1120724A | 1999-01-26 | |||
| JPH08105513A | 1996-04-23 | |||
| JPS5814542U | 1983-01-29 | |||
| JPH08226526A | 1996-09-03 | |||
| JPH0394455U | 1991-09-26 |
Attorney, Agent or Firm:
Tono Kono