Title:
HUB UNIT BEARING
Document Type and Number:
Japanese Patent JP2020029871
Kind Code:
A
Abstract:
To obtain a structure of a hub unit bearing which can prevent a scatter of grease into an outside space, can suppress the intrusion of muddy water into a combination seal ring, can promote the discharge of the muddy water intruding into the combination seal ring to the outside space, and can reduce a cost, related to the combination seal ring.SOLUTION: An outside-diameter cylinder part 35 of a slinger 31 is bent to an internal space side of a hub unit bearing at an acute angle in an axial direction from an outer end part of a slinger erection plate part 34 in a radial direction. Return lips 47a, 47b and 47c and recesses 48a, 48b and 48c are alternately formed in the axial direction at an internal peripheral face of a seal cylinder part 45 of a seal ring 32. The return lips 47a, 47b and 47c are arranged so that each of the lips is located outside in the radial direction as being located apart from the internal space in the axial direction. A first labyrinth seal 49 is formed between the return lip 47a arranged in a position which is the nearest the internal space, and the outside-diameter cylinder part 35.SELECTED DRAWING: Figure 2
Inventors:
SUZUKI AYAMI
WAKABAYASHI TATSUO
WAKABAYASHI TATSUO
Application Number:
JP2018154021A
Publication Date:
February 27, 2020
Filing Date:
August 20, 2018
Export Citation:
Assignee:
NSK LTD
International Classes:
F16C33/78; F16C19/18; F16J15/3232; F16J15/447
Attorney, Agent or Firm:
Kiwa Patent Office