Floating ball-nut for an electric assist steering system

Details Floating ball-nut for an electric assist steering system Floating ball-nut for an electric assist steering system

1987-02-24

1988-09-27

Love, John J.

Motor vehicles

Compensating devices

180148, 744248R, 318616, B62D 308, F16H 184

Patent

active

047734973

ABSTRACT:
An improved mounting arrangement for a ball nut drive assembly for a linear actuator is disclosed. The invention is described as embodied in an electric assist steering system. The steering system includes a housing surrounding at least a portion of a steering member having rack teeth thereon, a ball-nut drive assembly circumscribing a thread portion of the steering member for axially driving said steering member upon rotation of the ball-nut drive assembly, an electric assist motor for driving said ball-nut assembly into rotation in response to a control signal and an electronic control unit for providing said control signal in response to a measured amount of driver input torque. The steering member is radially supported relative to the housing at two spaced apart locations. The ball-nut drive assembly is axially spaced from the electric assist motor and connected thereto by a connection tube. Thrust bearings are located at each end of the ball-nut drive assembly and are operatively positioned between the ball-nut drive assembly and the housing. Each thrust bearing has an associated O-ring positioned between such thrust bearing and the housing. The thrust bearings and O-rings substantially restrain axial movement of the ball-nut drive assembly relative to the housing and enable radial movement of the ball-nut assembly relative to the housing.

REFERENCES:
patent: 4175475 (1979-11-01), Eckhardt
patent: 4186615 (1980-02-01), Adams
patent: 4415054 (1983-11-01), Drutchas
patent: 4593780 (1986-06-01), Sarto
patent: 4604911 (1986-08-01), Teramachi
patent: 4619155 (1986-10-01), Futaba
European Search Report EP 87 10 0907.

Affiliated with

Also associated with

Rating

Floating ball-nut for an electric assist steering system does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Floating ball-nut for an electric assist steering system, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Floating ball-nut for an electric assist steering system will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-2393752