公开(公告)号：US20240141954A1

公开(公告)日：2024-05-02

申请号：US18272683

申请日：2022-01-17

Applicant: NSK LTD.

Inventor： Masahito MATSUI ,  Takefumi KICHIKAWA ,  Haruhisa ASHIDA ,  Taketoshi CHIFU

IPC: F16C33/38

CPC classification number: F16C33/3806 ,  F16C33/3856 ,  F16C33/3887

Abstract: A crown type cage for a ball bearing includes an annular main portion, a plurality of pillar portions protruding in an axial direction from the main portion at predetermined intervals in a peripheral direction, and a spherical pocket formed between the adjacent pillar portions and capable of holding balls. The pillar portion has a pair of claw portions of which tip end portions are spaced apart from each other, and a connection portion that connects the pair of claw portions. A bottom surface of the main portion is provided with a part protruding in the axial direction.

公开(公告)号：US20240077109A1

公开(公告)日：2024-03-07

申请号：US18272695

申请日：2022-01-17

Applicant: NSK LTD.

Inventor： Masahito MATSUI ,  Takefumi KICHIKAWA

IPC: F16C33/38 ,  F16C19/06

CPC classification number: F16C33/3887 ,  F16C19/06

Abstract: An outer diameter of a claw portion is smaller than an outer diameter of a main portion, a radial width of the claw portion is ½ or less of a radial width of the main portion, an axial width from an upper surface of a connection portion of a pillar portion to a bottom surface of the main portion is ½ or less of an axial width of a crown type cage for a ball bearing, and in the main portion, an opening portion is provided between adjacent pockets.