| 摘要 |
PROBLEM TO BE SOLVED: To provide an electric power steering device in which an elastic member used for a coupling part of a worm shaft and an output shaft of an electric motor has an elastic characteristic to continuously change without an inflection point, and which prevents its settling. SOLUTION: This electric power steering device is constituted of: a first torque transmission member on which a central part of the coupling part to connect the output shaft of the electric motor and the worm shaft having a worm to each other is fixed on one of the shafts and which is made of a plate surface part integrally forming a plurality of projected parts arranged radially around an axis with equal intervals; a second torque transmission member a central part of which is fixed on the other shaft and made of a plate surface part a plurality of projected parts arranged with equal intervals in the circumferential direction of which are integrally formed so as to position between a plurality of the former projected parts when it is assembled on the first torque transmission member; and a plurality of barrel shape elastic members interposed between these projected parts. COPYRIGHT: (C)2009,JPO&INPIT
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