Bearings – Linear bearing – Recirculating
Patent
1986-08-04
1988-03-22
Footland, Lenard A.
Bearings
Linear bearing
Recirculating
F16C 2906
Patent
active
047324899
ABSTRACT:
A circulating type ball spline bearing may comprise a cylindrical outer sleeve having an internal annular bore, a cylindrical spline shaft adapted to be inserted into said internal annular bore of the outer sleeve and a plurality of balls to be intervened between said two members and operating in parallelly extending matching grooves so as to allow rectilinear relative motion between the two members. To manufacture the above-mentioned bearing with a compact size yet an appreciable rigidity, a plurality of arc-shaped ball turn channels for turning the direction of circulating balls between the load carrying ball grooves and non-load carrying ball return bores are provided in the end lids that are secured onto the opposite end faces of said cylindrical outer sleeve, while in the outer sleeve, each of the ball return bores is so positioned as seen in the cross section to be closer toward the spline shaft side than the plane including the centers of two adjacent balls present in two adjacent parallel load carrying ball grooves of the outer sleeve.
REFERENCES:
patent: 4363526 (1982-12-01), Teramachi
patent: 4375305 (1983-03-01), Teramachi
patent: 4572591 (1986-02-01), Walter et al.
Footland Lenard A.
Nippon Thompson Co. Ltd.
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