WORM REDUCTION GEAR AND STEERING SYSTEM

摘要

A worm reduction gear includes a bias member that biases a second end of a worm shaft in such a direction that the second end approaches a worm wheel. A guide member that guides movement of the second end is held in a holding hole in a housing. The holding hole has an opening at an end of the housing. The guide member includes a ring portion fitted in the holding hole to guide movement of the second end and a closing portion that closes an end of the ring portion and thus an opening of the holding hole.

主权项

1. A worm reduction gear comprising:
a housing in which a holding hole with an opening at one end of the holding hole is formed; a worm shaft including a first end coupled to an electric motor and a second end positioned on the opposite side of the worm shaft from the first end in an axial direction, the worm shaft being housed in the housing; a worm wheel that meshes with the worm shaft; a first bearing held by the housing and supporting the first end such that the first end is rotatable; a second bearing that supports the second end such that the second end is rotatable; a bias member that directly or indirectly biases the second end in such a direction that the second end approaches the worm wheel; and a guide member including a ring portion fitted in the holding hole in the housing to guide movement of the second end of the worm shaft and a closing portion that closes an end of the ring portion and the opening of the holding hole,