Rotation ring

Details Rotation ring Rotation ring

2011-06-28

2011-06-28

Hannon, Thomas R (Department: 3656)

Bearings

Rotary bearing

Antifriction bearing

C384S045000

Reexamination Certificate

active

07967511

ABSTRACT:
Provided is a slewing ring which has a structure with a large slewing diameter, and is readily produced at low cost. The slewing ring includes: an outer ring (1), in which a load rolling groove (10) and a no-load rolling groove (11) for a large number of balls (4) are arranged along a circumferential direction of an inner peripheral surface of the outer ring (1) in parallel to each other; an inner ring (2), which is provided inside the outer ring (1), and in which a load rolling groove (20) and a no-load rolling groove (21) for the large number of balls (4) are arranged along a circumferential direction of an outer peripheral surface of the inner ring (2) in parallel to each other; and a plurality of ball-retaining blocks (3), which are provided in a gap between the outer ring and the inner ring, are assembled between the outer ring and the inner ring through the large number of balls, and causes the large number of balls (4) to circulate in an endless manner between the load rolling groove (10) of the outer ring (1) and the no-load rolling groove (21) of the inner ring (2) and between the no-load rolling groove (11) of the outer ring (1) and the load rolling groove (20) of the inner ring (2).

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International Search Report of PCT/JP2008/066666, mailing date of Oct. 21, 2008.

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