Cross roller bearing
AssigneeNippon Thompson Co., Ltd.
InventorsTakashi Yatsu, Tatsuo Mottate
Life of this patent
Estimating the term…
Abstract
A cross roller bearing includes an inner ring, an outer ring and a plurality of generally cylindrically shaped rollers placed in a channel defined between the inner and outer rings as being alternately crossed with any two adjacent rollers having their axes of rotation directed perpendicular to each other. Both of the inner and outer rings are unitary in structure. In one form of the invention, the outer ring is provided with a radial hole extending therethrough radially, through which the rollers may be inserted in the channel defined between the inner and outer rings. An insert is also provided to be fixedly fitted into the radial hole so as to close the radial hole after insertion of the rollers into the channel.
Claims9
A roller bearing assembly comprising:
- an inner ring provided with a first groove extending circumferentially along an outer periphery thereof;
- an outer ring provided with a second groove extending circumferentially along an inner periphery thereof, whereby said first and second grooves define a channel when said inner and outer rings are set in position relative to each other, said outer ring being provided with at least one radial hole extending through said outer ring in the direction of a selected radius of said outer ring;
- a plurality of rollers of predetermined shape which are set in position by being inserted through said radial hole into and along said channel to be in rolling contact with said inner and outer rings thereby allowing said inner and outer rings to rotate relative to each other;
- said radial hole having a first section means which is cylindrical in shape, extending from the outer periphery of said outer ring inwardly over a predetermined distance, and having a diameter of a size that said rollers pass therethrough only when the axes of rotation of said rollers are coextensive with that axis of said radial hole which extends along said selected radius;
- and
- a second section means which is flared out from the inward end of said first section toward the inner periphery of said outer ring wherein said flared out section means is shaped to allow said rollers to turn at least 45.degree. to be properly set in position in said channel so as to define an intended cross arrangement;
- and
- an insert which may be fixedly set in position as inserted in said radial hole thereby plugging said radial hole after insertion of said rollers into said channel.
Dependencies are inferred from the claim text.