Title:
COMICAL ROLLER BEARING
Document Type and Number:
Japanese Patent JP2019168067
Kind Code:
A
Abstract:
To provide a conical roller bearing with a high contact angle of 25° or more, which can hold a roller and holder assembly so as not to separate from an inner ring during assembly, can separate the roller and holder assembly from the inner ring as necessary, and further can prevent poor lubrication from occurring in a case of being used in grease lubrication.SOLUTION: In a conical roller bearing 11 with a contact angle of 25° or more, on a small diameter side of an inner ring raceway surface 13a of an inner ring 13, a small diameter side protrusion part 13c having an outer diameter Dsmaller in diameter than a roller inscribed circle diameter Dand protruding in the axial direction is provided. On the outer peripheral surface of the small diameter side protrusion part 13c, an annular ring 23 having an outer diameter surface whose outer diameter Dis larger than the roller inscribed circle diameter Dis provided. On an outer diameter surface of the annular ring 23, arc grooves 23a having a diameter Dwhose groove bottom is equal to or smaller than the roller inscribed circle diameter are arranged in a circumferential direction as many as conical rollers 14 of the conical roller row.SELECTED DRAWING: Figure 1
Inventors:
HAYASHI YASUYOSHI
NAKAMURA SHOHEI
NAKAMURA SHOHEI
Application Number:
JP2018057456A
Publication Date:
October 03, 2019
Filing Date:
March 26, 2018
Export Citation:
Assignee:
NTN TOYO BEARING CO LTD
International Classes:
F16C33/58; F16C19/36; F16C33/66
Attorney, Agent or Firm:
Torii Kazuhisa
Torii Hiroshi
Torii Hiroshi