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US 9,958,012 B2Granted
Rolling bearing
AssigneeNsk Ltd.
InventorTakahisa Nakata
Life of this patent
Estimating the term…
Abstract
The second lip has an annular protrusion formed at one end portion in a thickness direction of a lip tip portion configured to be in sliding contact with the slinger and protruding in the thickness direction, and a thickness of the lip tip portion is formed thicker than a thickness of a lip part except for the protrusion. The protrusion is formed to be reduced in width toward the tip-side in the thickness direction and configures a sliding contact part configured to be in linearly sliding contact with the slinger. The circular plate part of the slinger is formed tilted toward the seal member in the axial direction, and the slinger has an annular flange part integrally formed therewith by bending a tip of the circular plate part so as to axially cover an area above the sliding contact part of the seal member.
Claims3
A rolling bearing comprising:
- a fixed ring fixed to a stationary member;
- a rotary ring arranged to be rotatable relative to the fixed ring and fixed to a rotary member;
- a rolling element incorporated to be rollable between raceways provided at facing peripheries of the fixed ring and the rotary ring, and
- a sealing device provided in an open area of an axial end portion between the fixed ring and the rotary ring and configured to seal a bearing inner space,
- wherein the sealing device includes a slinger arranged in the open area of the axial end portion of the fixed ring and a seal member arranged in the open area of the axial end portion of the rotary ring,
- wherein the slinger is formed to have a circular ring shape and has an annular cylinder part fixed to a periphery of the fixed ring, a circular plate part integrally protruding from the annular cylinder part in a radial direction, and an annular flange part integrally protruding from an end portion of the circular plate part in an axial direction,
- wherein the seal member is arranged to be closer to the bearing inner space than the slinger, has a circular plate-shaped part having a peripheral edge fixed to the rotary ring, and also has integrally at least a first annular lip positioned at a radially opposite side to the peripheral edge fixed to the rotary ring and configured to be in sliding contact with the fixed ring and a second annular lip protruding and tilted from an intermediate position of the circular plate-shaped part and configured to be in sliding contact with the slinger,
- wherein the second lip has an annular protrusion formed at one end portion in a thickness direction of a lip tip portion configured to be in sliding contact with the circular plate part of the slinger and protruding in the thickness direction, and a thickness of the lip tip portion is formed thicker than a thickness of a lip part, the lip part being a portion of the second lip other than the protrusion,
- wherein the protrusion is formed to be reduced in width toward the tip-side in the thickness direction and configures a sliding contact part configured to be in linearly sliding contact with the circular plate part of the slinger, and
- wherein the circular plate part of the slinger is formed tilted toward the seal member in the axial direction,
- wherein the annular flange part of the circular plate part is configured to axially cover an area above the sliding contact part of the seal member,
- wherein the other end portion of the second lip, which is located at an opposite side to the protrusion of the lip tip portion in the thickness direction, is formed to have an annular step portion protruding in a step shape toward the radial direction, and
- wherein a labyrinth gap is formed between the annular step portion and an inner periphery of the flange part of the slinger.
10 more elements
A rolling bearing comprising:
- a fixed ring fixed to a stationary member;
- a rotary ring arranged to be rotatable relative to the fixed ring and fixed to a rotary member;
- a rolling element incorporated to be rollable between raceways provided at facing peripheries of the fixed ring and the rotary ring, and
- a sealing device provided in an open area of an axial end portion between the fixed ring and the rotary ring and configured to seal a bearing inner space,
- wherein the sealing device includes a slinger arranged in the open area of the axial end portion of the fixed ring and a seal member arranged in the open area of the axial end portion of the rotary ring,
- wherein the slinger is formed to have a circular ring shape and has an annular cylinder part fixed to a periphery of the fixed ring and a circular plate part integrally protruding from the annular cylinder part in a radial direction,
- wherein the seal member is arranged to be closer to the bearing inner space than the slinger, has a circular plate-shaped part having a peripheral edge fixed to the rotary ring, and also has integrally at least a first annular lip positioned at a radially opposite side to the peripheral edge fixed to the rotary ring and configured to be in sliding contact with the fixed ring and a second annular lip protruding and tilted from an intermediate position of the circular plate-shaped part and configured to be in sliding contact with the slinger,
- wherein the second lip has an annular protrusion formed at one end portion in a thickness direction of a lip tip portion configured to be in sliding contact with the slinger and protruding in the thickness direction, and a thickness of the lip tip portion is formed thicker than a thickness of a lip part, the lip part being a portion of the second lip other than except for the protrusion,
- wherein the protrusion is formed to be reduced in width toward the tip-side in the thickness direction and configures a sliding contact part configured to be in linearly sliding contact with the slinger,
- wherein the slinger has an annular flange part integrally formed therewith by bending a tip of the circular plate part so as to axially cover an area above the sliding contact part of the seal member, and
- wherein the circular plate part of the slinger is formed with a plurality of annular concave portions, each of which is recessed toward an axially inner side, in a radial direction of the circular plate part, so that the circular plate has a plurality of stepped portions.
8 more elements
Dependencies are inferred from the claim text.