| 摘要 |
An electric power steering system (1) includes a j oint (21) that connects a rotary shaft (20) of an electric motor (16) with a worm shaft (18) of a speed reducer (17). The joint (21) includes a first rotational element (22) that has a boss (25) into which a first end portion (18a) of the worm shaft (18) is press-fitted, and a flange (26) extending radially from the boss (25). The first bearing (30) is held by a housing (17a) and supports the first end portion (18a) so that the first end portion (18a) is rotatable and movable in an axial direction (X1). A first elastic body (32), which urges the worm shaft (18) in the axial direction (X1) toward the electric motor (16) through the first rotational element (22), is provided between an inner ring (34) of the first bearing (30) and the flange (26). |
