Ball bearing
AssigneeSKF Kugellagerfabriken GmbH
InventorsArmin Olschewski, Manfred Brandenstein, Lothar Walter, Horst M. Ernst
Life of this patent
Estimating the term…
Abstract
A linear moving ball bearing has a cage with axially extending ball guide channels joined at their ends by semi-circular turn around channels, one of the axially extending channels being open radially inward for load carrying balls and the other axially extending guide channel directing unloaded balls. An outer sleeve closely surrounds the cage as it continues in the region of the axially extending guide channels, and has crescent shaped slots extending therethrough aligned with the semicircular turn around channels.
Claims9
In a linear ball bearing comprising a cage having a plurality of ball guides, each ball guide having axially extending guide channels for load-carrying and non-load-carrying balls and semicircular channels connecting pairs of said guide channels together, endless rows of balls disposed in said ball guides, and an outer sleeve extending axially over the cage and having ball races axially extending in its bore, the axially extending races for the non-load-carrying balls extending at a greater diameter of the bearing than the axially extending races for the load-carrying balls, and the axially extending races both for the load-carrying and for the non-load-carrying balls being closed off radially outwardly;
- the improvement wherein said semicircular channels in the cage have bottoms that rise convexly radially outward toward the circumference of the bearing between each pair of interconnected axially extending guide channels, said convex bottoms having apices between the respective axially extending guide channels, and the outer sleeve has crescent-shaped slots opening radially outward at least at said apices and extending substantially only in the portion of said outer sleeve adjacent said semicircular channels.
In a linear ball bearing comprising a cage having a plurality of ball guides, each ball guide having axially extending guide channels for load-carrying and non-load carrying balls and semicircular channels connecting pairs of said guide channels together, endless rows of balls disposed in said ball guides, and an outer sleeve extending axially over the cage and having ball races axially extending in its bore, the axially extending races for the non-load-carrying balls extending at a greater diameter of the bearing than the axially extending races for the load-carrying balls, and the axially extending races both for the load-carrying and for the non-load-carrying balls being closed off radially outwardly;
- the improvement wherein said semicircular channels in the cage have bottoms that rise convexly radially outward toward the circumference of the bearing between each pair of interconnected axially extending guide channels, said convex bottoms having apices between the respective axially extending guide channels, and the outer sleeve has crescent-shaped slots opening radially outward at least at said apices, said axially extending guide channel for both the load-carrying and non-load-carrying balls being opened radially inward.
Dependencies are inferred from the claim text.