TRANSMISSION RATIO VARIABLE DEVICE AND STEERING GEAR

A variable transmission ratio apparatus for effectively preventing ratcheting between a flexible spline and a circular spline caused by a steering operation performing in a locked state. A variable transmission ratio apparatus 1 includes a strain wave gear mechanism 10 for adding rotation resulting...

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Bibliographic Details
Main Authors YAMAMORI, MOTOYASU, SUZUKI, HIROTSUNE, WATANABE, OSAMU, SUZUKI, YOSHINORI, FUJIWARA, HIDETOSHI
Format Patent
LanguageEnglish
French
German
Published 31.12.2008
Subjects
BLASTING
ENGINEERING ELEMENTS AND UNITS
GEARING
GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVEFUNCTIONING OF MACHINES OR INSTALLATIONS
HEATING
LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
LIGHTING
MECHANICAL ENGINEERING
MOTOR VEHICLES
PERFORMING OPERATIONS
THERMAL INSULATION IN GENERAL
TRAILERS
TRANSPORTING
WEAPONS
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Summary:A variable transmission ratio apparatus for effectively preventing ratcheting between a flexible spline and a circular spline caused by a steering operation performing in a locked state. A variable transmission ratio apparatus 1 includes a strain wave gear mechanism 10 for adding rotation resulting from motor drive to rotation from an input shaft 3 resulting from a steering operation and transmitting the added rotation to an output shaft 4, a housing 6 accommodating the strain wave gear mechanism 10 and the motor 2 and fixed to a non-rotating portion, and a lock device 21 for locking the housing 6 and a motor shaft 15 in a manner prohibiting relative rotation therebetween. Among the circular splines 11 and 12 forming the strain wave gear mechanism 10, the number of teeth of the circular spline 12 connected to the output shaft 4 is greater than the number of teeth of the circular spline 11 connected to the input shaft 3.
Bibliography:Application Number: EP20060833225