Rolling bearing
AssigneeJtekt Corporation
InventorsYasuhiko Ishii, Youzou Taniguchi, Takashi Iwata
Life of this patent
Estimating the term…
Abstract
An inner ring includes: a pair of shoulder outer peripheral surfaces on first and second axial sides of a raceway surface of the inner ring in contact with balls; seal grooves disposed in first and second axial ends of the inner ring and defining labyrinth clearances with lips; and edges disposed on the first and second axial sides. Each of the edges is configured to cause grease flowing along an associated one of the shoulder outer peripheral surfaces to leave the shoulder outer peripheral surface in the direction of an extension thereof. Each of the lips includes a lip oblique surface functioning as a guide surface to guide the grease that has left the edge not to a radially inner region of the bearing but to a radially outer region of the bearing.
Claims10
A rolling bearing comprising:
- an inner ring;
- an outer ring;
- a plurality of balls each in contact with a raceway surface of the inner ring and a raceway surface of the outer ring at a contact angle;
- an annular cage retaining the balls;
- and
- seals attached to portions of the outer ring on first and second axial sides, each seal including a lip defining a labyrinth clearance with the inner ring, each lip being configured to prevent grease leakage,
- wherein:
- the inner ring includes
- a pair of shoulder outer peripheral surfaces on the first and second axial sides of the raceway surface of the inner ring in contact with the balls,
- seal grooves in first and second axial ends of the inner ring, each seal groove defining the labyrinth clearance with an associated one of the lips, and
- edges on the first and second axial sides, each edge being configured to cause grease flowing along an associated one of the shoulder outer peripheral surfaces to leave the shoulder outer peripheral surface in the direction of an extension of the shoulder outer peripheral surface,
- the lips each include a guide surface to guide the grease that has left the edge not to a radially inner region of the rolling bearing but to a radially outer region of the rolling bearing, and
- an inner peripheral surface of the cage does not extend in an axial direction past the opening of the labyrinth clearance, the opening of the labyrinth clearance being formed between the edge of each outer peripheral surface and the guide surface of each lip.
Dependencies are inferred from the claim text.