To provide a pre-load application structure of a motor support bearing which enables improvement of assemblability of a component.SOLUTION: A protection member 72 includes: a ring part 72a disposed between an elastic member 71 and a bearing 41; a cylinder part 72b which protrudes from the ring part 72a in an axial direction and in which the elastic member 71 is disposed at an outer periphery or an inner periphery; and a restriction part 72e which protrudes from the ring part 72a to the opposite side of the cylinder part 72b and contacts with an inner peripheral surface or an outer peripheral surface of an outer ring 37 of the bearing 41 to restrict radial movement of the protection member 72 relative to the bearing 41.SELECTED DRAWING: Figure 2
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