Machine element or mechanism – Gearing – Directly cooperating gears
Patent
1984-05-21
1984-12-11
Staab, Lawrence J.
Machine element or mechanism
Gearing
Directly cooperating gears
74409, 74441, 744248R, F16H 118, F16H 120, F16H 5518
Patent
active
044870876
ABSTRACT:
An improved ball nut having adjustable preloading comprises a pair of ball nut halves both in threaded engagement with a ball screw. Only one of the nut halves is secured to a movable machine member, the other nut half being movable to the relative fixed nut half. Separating the two nut halves is a pair of concentric sleeves, which are each fabricated from a piezomagnetic material such as nickel or nickel alloy. The sleeves are each keyed to the nut halves to prevent one nut half from rotating independently of the other. Between the sleeves is a magnetic coil which, when energized, causes the sleeves to expand. By varying the coil excitation, the sleeve length, and hence, the force exerted on the ball nut halves by the sleeves can be varied accordingly to vary ball nut preloading.
REFERENCES:
patent: 2978920 (1961-04-01), Sears et al.
patent: 3141349 (1964-07-01), McDonald
patent: 3198029 (1965-08-01), Orner
patent: 3304794 (1967-02-01), Bird
patent: 3323777 (1967-06-01), McMullen
patent: 3369422 (1968-02-01), Sears
patent: 3393576 (1968-07-01), Carlson
patent: 3393577 (1968-07-01), Better
patent: 3563107 (1971-02-01), Nilsson
patent: 3638507 (1972-02-01), Orner
patent: 3721133 (1973-03-01), Denkowski
patent: 3760686 (1973-09-01), Goodwin
patent: 3851541 (1974-12-01), Ploss et al.
patent: 3961547 (1976-06-01), Shainberg et al.
patent: 4369011 (1983-01-01), Ploss
Bednarek Michael D.
Kearney & Trecker Corporation
Staab Lawrence J.
LandOfFree
Ball nut having adustable preloading does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Ball nut having adustable preloading, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Ball nut having adustable preloading will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1457364