| 摘要 |
PROBLEM TO BE SOLVED: To improve durability in a buffer member having a gear shock absorption function in a torque transmission route of a motor in an electric power steering device. SOLUTION: This electric power steering device 10 has a bearing 50 rotatably supporting a worm wheel 44 as a steering assist gear independently of a pinion shaft 13, and the buffer member 60 is sandwiched between a lock part 65 of an arm 64 connected to the pinion shaft 13 and a lock part 66 provided in the worm wheel 44.
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