| 摘要 |
<p>PROBLEM TO BE SOLVED: To provide a motor actuator which effectively inhibits scattering of grease into a housing.SOLUTION: A motor 20 includes: a motor case 23 having a bearing housing part 25 to which an oil impregnation bearing 28 is fixed; and a rotary shaft 21 which protrudes from the bearing housing part 25 to the exterior of the motor case 23. The motor case 23 is elastically supported by a housing 10 through O rings 30, 31. The bearing housing part 25 includes: a cylindrical part 25a that houses the oil impregnation bearing 28; and a flange part 25b which faces an axial outer end surface 28a of the oil impregnation bearing 28, the flange part 25b where an opening part 25c into which the rotary shaft is inserted is formed. The oil impregnation bearing 28 has a second chamfered part 28a, to which grease 29 is applied, at the inner periphery side of the axial outer end surface 28a. An inner diameter d1 of the opening part 25c is set so as to be larger than an outer diameter d2 of the rotary shaft 21 and smaller than an outer diameter d3 of the second chamfered part 28e.</p> |
