Floating ball-nut for an electric assist steering system
This patent describes a linear actuator comprising: a housing; a member disposed within at least a portion of the housing. The member being axially movable relative to the housing and having a thread portion; first bearing means for supporting at spaced apart locations the member for the axial movement relative to the housing; a rotary drive means; ball-nut drive means positioned between the spaced apart locations and operatively drivable in rotation by the rotary drive means and drivingly connected to the thread portion of the member, the ball-nut drive means, when driven in rotation, moving the member axially relative to the housing; second bearing means between the housing and the ball-nut drive means for enabling radial movement of the ball-nut drive means relative to the housing; and at least one elastically deformable member positioned between the second bearing means and the housing for permitting limited axial movement of the ball-nut drive means relative to the housing.
- Assignee:
- TRW Inc., Lyndhurst, OH
- Patent Number(s):
- US 4773497
- OSTI ID:
- 6888191
- Country of Publication:
- United States
- Language:
- English
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