Patent ID: 9638248
Date: 2017-05-02
CPC Classifications: F16C

Claim:
1. A radial bearing plastic cage injection molded by an axial draw mold, comprising: annular large-diameter and small-diameter rim parts, axially spaced and coaxially arranged; and multiple pillar parts connecting together the large-diameter and small-diameter rim parts in the axial direction and arranged at regular intervals in the circumferential direction, wherein: the pillar parts are connected to the inner peripheral surface of the large-diameter rim part and to the outer peripheral surface of the small-diameter rim part; the inner peripheral surface of the large-diameter rim part and the outer peripheral surface of the small-diameter rim part respectively have an axial-direction inside portion overlapping with the pillar parts in the axial direction and an axial-direction outside portion not overlapping with the pillar parts in the axial direction; a small-diameter annular member is internally fitted in the axial-direction outside portion of the inner peripheral surface of the large-diameter rim part; and a large-diameter annular member is externally fitted on the axial-direction outside portion of the outer peripheral surface of the small-diameter rim part.