Bearings – Rotary bearing – Antifriction bearing
Patent
1993-03-09
1994-06-21
Footland, Lenard A.
Bearings
Rotary bearing
Antifriction bearing
384450, 384571, F16C 1938
Patent
active
053223748
DESCRIPTION:
BRIEF SUMMARY
INDUSTRIAL FIELD OF APPLICATION
This invention relates to an antifriction roller bearing which can rotate only in one direction.
PRIOR ART
In general, antifriction roller bearings includes the three types of cylindrical roller bearing, conical roller bearing and self-aligning roller bearing.
With the cylindrical roller bearings, the rollers are in line contact with the inner and outer rings, and a radial load applied on the bearing produces only normal loads on the contact portions.
On the other hand, with the conical roller bearings and the self-aligning roller bearings, a radial load produces a normal load acting vertically on the slanted surface and a tangential load acting in parallel to the slanting surface. But, since a thrust load is always applied to those bearings to prevent the inner and outer rings from displacing in the axial direction, an additional normal component of the thrust force are applied vertically between the rings and rollers, thus producing an additional surface contact pressure. Further, since the normal load acting between the rings and rollers tends to push the rollers out of the raceway from smaller dia. side to larger side, the guide flange must be provided at the larger dia. side to prevent the rollers from being driven out of raceway. But, since the large-dia. end face of the conical rollers is in sliding contact with the guide flange, the PV value contributed by the sliding friction largely restricts the load carrying capacity of the conical type roller bearings.
Problems to be Solved by the Invention
The antifriction roller bearings are often used where a shaft or a journal is rotated in both normal and reverse directions, but, depending on the type of machinery, sometimes used where a shaft or a journal is rotated only in one direction.
The present invention intends to provide an antifriction roller bearing which can be widely used in a variety of machinery, with a larger load capacity than the conventional cylindrical and conical roller bearings and an enhanced rolling performance without producing such a large sliding friction at the large-dia. end face of the rollers as experienced in the conical roller bearing, as well as has a high efficiency of power transmission performance without any possibility of bearing seizure, thus most suitable for high speed rotation.
Means for Solving the Problems
To solve the above problems, an antifriction roller bearing according to the present invention comprises:
two sets of bearing single units each consisting of an inner ring, an outer ring and intermediate rotation bodies, and one set of energizing means; and
the inner ring being provided with an inner raceway track of mono-hyperboloid of revolution about one axis;
the outer ring being provided with an outer raceway track of mono-hyperboloid of revolution about the axis;
the inner raceway track and the outer raceway track being oppositely faced with each other to form a raceway whose diameter is larger at one end than at the other end;
the center axes of the intermediate rotation bodies with a cylindrical or conical rolling surface being arranged in a circumferential direction of the raceway at an angle to a cross section including the axis, and the surface of the intermediate rotation bodies being arranged so as to come into linear contact with the inner raceway track and the outer raceway track;
the inner ring or the outer ring rotating only in such a given direction as to roll the intermediate rotation bodies along the inner raceway track in the one-axis direction toward a small-dia. end of the raceway;
the inner ring or the outer ring being provided with a ringlike portion which brings to a stop movement of the intermediate rotation bodies in the axial direction, when the inner ring or the outer ring is rotated in the given direction;
the two single units being arranged so as to face each other in the one-axis direction;
the energizing means being arranged between the inner rings or the outer rings faced each other in the one-axis direction, to energize the inner ri
REFERENCES:
patent: 4915513 (1990-04-01), Orain
patent: 5007747 (1991-04-01), Takeuchi et al.
LandOfFree
Antifriction roller bearing does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Antifriction roller bearing, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Antifriction roller bearing will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-2217466