Title:
PARALLEL CARDAN DRIVE SYSTEM RAILROAD VEHICULAR GEAR UNIT
Document Type and Number:
Japanese Patent JP2018138810
Kind Code:
A
Abstract:
PROBLEM TO BE SOLVED: To provide a gear unit capable of reducing oscillation and noise produced when gear and pinion mesh by only two-dimensional tooth surface modification and with low cost in a parallel Cardan drive system railroad vehicular gear unit having a pair of helical pinion 1 and helical gear 2, each having gear specifications with modules of 4 to 8, pressure angle of 20 to 30°, and helix angle of 15 to 30°.SOLUTION: A railroad vehicular gear unit GM of the invention in that a tooth flank 11 in a tooth trunk direction of helical pinion 1 is expressed by a circular arc curve and that comprises: a circular arc curved crowning modification surface GMover 55% of the full width in a tooth width direction of the helical pinion; and a relieving modification surface GMof remaining part on both end sides in the tooth width direction. The modification amount R of the crowning modification surface is set within a range of equation (1).SELECTED DRAWING: Figure 2
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Inventors:
HAYASHI SATOSHI
KAWABATA KAZUAKI
OTSUKA TOMOHIRO
ASANO JUN
KAWABATA KAZUAKI
OTSUKA TOMOHIRO
ASANO JUN
Application Number:
JP2017033550A
Publication Date:
September 06, 2018
Filing Date:
February 24, 2017
Export Citation:
Assignee:
TOYO ELECTRIC MFG CO LTD
TOKAI RYOKAKU TETSUDO KK
TOKAI RYOKAKU TETSUDO KK
International Classes:
F16H55/08; B61C9/38; F16H1/08
Domestic Patent References:
| JPH08197332A | 1996-08-06 | |||
| JP2008275060A | 2008-11-13 | |||
| JPH0262461A | 1990-03-02 |
Foreign References:
| WO2015015806A1 | 2015-02-05 |
Attorney, Agent or Firm:
Seiryu Corporation