WORM REDUCTION GEAR AND STEERING MECHANISM

摘要

In a worm reduction gear, a second bearing that supports a second end of a worm shaft and a guide member are housed in a holding hole in a housing. A bias member biases the second end of the worm shaft toward the worm wheel (in a second direction). The guide member is elastically fitted in the holding hole in the housing to guide movement of the second end via the second bearing. A slit is fanned in the guide member. Stress is relieved which is exerted on the guide member when the guide member is elastically fitted in the holding hole.

主权项

1. A worm reduction gear comprising:
a housing with a holding hole formed therein; 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 to support the first end so that the first end is rotatable; a second bearing that supports the second end so that the second end is rotatable; a bias member that directly or indirectly biases the second end toward the worm wheel; and a guide member having a slit and elastically fitted in the holding hole in the housing to directly or indirectly guide movement of the second end.