Patent ID: 11867235
Assignee: NTN CORPORATION
Field: Mechanical elements (Mechanical engineering)
Classification: CPC F | IPC F

Claim 0:
1. A plummer block comprising:
a bearing; and
a bearing housing that accommodates and supports the bearing, wherein
the bearing housing includes an upper housing portion and a lower housing portion that is separate from the upper housing portion,
the upper housing portion has a pair of first surfaces facing downward and located at a distance from each other in a radial direction of the bearing,
the lower housing portion has a pair of second surfaces facing upward and located at a distance from each other in the radial direction of the bearing,
each of the pair of first surfaces has:
a contact region in contact with each of the pair of second surfaces; and
a first protruding region protruding from the contact region at least outward in the radial direction of the bearing when viewed in an up-down direction which intersects with an axial direction of the bearing,

a maximum width R1 of the pair of first surfaces in the radial direction is greater than a width R2 of the pair of second surfaces in the radial direction at a position in an axial direction of the bearing where the maximum width R1 is measured, and
a difference (R1−R2) between the maximum width R1 and the width R2 is 2% or more and 15% or less of the maximum width R1.