Patent ID: 8776943
Filing Date: 2014-07-15
Classification: B62D,F16D

Abstract:
1. An electric power steering device comprising: a worm shaft comprising a first end portion and a second end portion; a worm wheel which engages the worm shaft and which is connected to a steering turning mechanism; a joint which connects the first end portion to an output shaft of an electric motor so as to transmit torque; and an urging member which elastically urges the second end portion in a direction in which a distance between centers of the worm shaft and the worm wheel is shortened, wherein the first end portion comprises: wherein the joint comprises: wherein the electric power steering device further comprises a diameter enlargement member which is arranged in the first tubular portion and which enlarges a part of the first tubular portion in an axial direction thereof to press the internal teeth portion toward the external teeth portion.