Bearings – Linear bearing – Recirculating
Patent
1986-12-08
1987-09-08
Footland, Lenard A.
Bearings
Linear bearing
Recirculating
384 47, F16C 2906
Patent
active
046920366
ABSTRACT:
A roller bearing for endless linear motion is composed of a long size track rail having a track groove on its outer face, a slide unit having an endless circuit including a track groove, said slide unit being mounted on the rail; and rollers being arranged in cross-roller mode for the endless linear motion. The circulation path for the roller is constructed by track grooves, return path and direction changing paths. The track groove and return path are straight and parallel to each other, and the direction changing path connects the track groove and the return path at respective ends. A slightly inclined clearance groove is provided on the both ends of the track groove on the side of the slide unit, and its angle is formed greater than the angle of the track groove. The boundary line between the track groove and the clearance groove is V-shaped, seen from the end face of the track rail, and the apex of the V-shape points to the side of the clearance groove. The improvement for the track groove leads to smooth running of rollers, and consequently to reduction of slide resistance and displacement of the bearing.
REFERENCES:
patent: 3960413 (1976-06-01), Abbuhl et al.
patent: 4215904 (1980-08-01), Teramachi
patent: 4556262 (1985-12-01), Geka
patent: 4563045 (1986-01-01), Katayama
Footland Lenard A.
Nippon Thompson Co. Ltd.
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