Title:
PLASTIC HELICAL GEAR
Document Type and Number:
WIPO Patent Application WO/2017/056659
Kind Code:
A1
Abstract:
Provided is a plastic helical gear that has good rotation transmission accuracy and that can reduce a rotation transmission error caused by misalignment of a gear shaft. In a plastic helical gear (1) having a three-dimensional tooth-surface modification section (12) in a tooth surface (11) of each involute gear tooth (2), the three-dimensional tooth-surface modification section (12) of the tooth surface (11) is a surface combining a tooth-top modification surface (16) and an arc crowning surface (18). The tooth-top modification surface (16) gradually decreases in tooth thickness from a position between a tooth top (13) and a tooth root (14) toward the tooth top. The arc crowning surface (18) gradually decreases in tooth thickness from a position between one end in the tooth width direction and the other end in the tooth width direction toward both ends in the tooth width direction. A line (L1) extending from an intersection point P0 between the starting position of the tooth-top modification surface (16) and the apex position of the arc crowning surface (18) to the tooth root (14) is aligned with a line on the tooth surface (11) of the involute gear tooth (2).
More Like This:
| WO/2002/043897 | METHOD AND DEVICE FOR PRODUCING A TOOTHED WHEEL |
Inventors:
OHMI KENJI (JP)
Application Number:
PCT/JP2016/071801
Publication Date:
April 06, 2017
Filing Date:
July 26, 2016
Export Citation:
Assignee:
ENPLAS CORP (JP)
International Classes:
F16H55/08; F16H55/06; G03G21/16
Foreign References:
| JP2008240793A | 2008-10-09 | |||
| JPH1089442A | 1998-04-07 | |||
| JPH0422799A | 1992-01-27 |
Attorney, Agent or Firm:
OHNUKI & KOTAKE (JP)
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