| 摘要 |
PROBLEM TO BE SOLVED: To provide a power steering device having a structure which can improve fixing force of a torque sensor to a rotation shaft of a sensor sleeve, improving sealability of a seal member between a housing and a rotation shaft.SOLUTION: A power steering device 1 has a housing 20 through which a rotation shaft 10 for transmitting steering torque is inserted and sensor sleeves 80 attached to an outer peripheral surface of the rotation shaft 10, and also has a torque sensor 70 for detecting steering torque of the rotation shaft 10 and seal members 90 arranged between the outer peripheral surfaces of the sensor sleeves 80 and an inner peripheral surface of the housing 20. The seal members 90 have: main body portions 100 that are pressed into the outer peripheral surfaces of the sensor sleeves 80 and presses the sensor sleeves 80 from outside; first lip portions 101 that protrude from the main body portions 100 outside in a radial direction and contacts the inner peripheral surface of the housing 20; and second lip portions 102 that protrude from the main body portions 100 toward a torque input side in a shaft direction and contact the vertical surface of the housing portion 20. |
