Hub Unit Bearing
AssigneeNsk Ltd.
InventorYoshio KANEKO
Life of this patent
Estimating the term…
Abstract
Provided is a hub unit bearing wherein a cover can be firmly fitted with an outer ring member, and it is difficult for foreign matter to enter inside through a water drainage hole formed in the cover. The cover that covers the inside end section in the axial direction of the hub unit bearing includes a disk section, a small-diameter cylindrical section bent in the axial direction from the outer perimeter edge section of the disk section and a large-diameter cylindrical section. A cut and raised section that is cut and raised toward the inside in the radial direction is formed in the small-diameter cylindrical section, and a water drainage hole that passes through from inside to outside the cover is provided in the portion that is cut and separated from the small-diameter cylindrical section.
Claims7
A hub unit bearing comprising:
- an outer ring member, which is a stationary ring;
- an inner ring member, which is a rotating ring that can rotate relative to the outer ring member via a plurality of rolling elements;
- and
- a cover that covers the inside end sections in the axial direction of the outer ring member and inner ring member,
- the cover having:
- a disk section;
- and
- a cylindrical section that is bent outward in the axial direction from the perimeter edge section of the disk section, and is fitted with and fastened to the outer ring member, and
- the cylindrical section having a groove section that is recessed toward the inside or the outside in the radial direction along the axial direction, and a water drainage hole that passes through from the inside to the outside of the cover is formed in the portion between the groove section and the outer ring member.
The hub unit bearing according to claim further comprising:
- a seal member made of an elastic material and that is provided on the inside end section in the radial direction of the disk section, the edge on the tip end of the seal lip of the seal member coining in contact all the way around the surface of the inner ring member or a separate member that rotates together with the inner ring member.
Dependencies are inferred from the claim text.