Seal and cover

Patent metadata

Field	Value
Publication number	US-2016010692-A1
Application number	US-201514752202-A
Country	US
Kind code	A1
Filing date	Jun 26, 2015
Priority date	Jul 8, 2014
Publication date	Jan 14, 2016
Grant date	—

Abstract

A seal seals a bearing internal space in a bearing apparatus for a vehicle. The seal includes a core and a first elastic member attached to the core. The core includes a first tubular portion and a first flange portion. An outer peripheral surface of the first tubular portion is arranged so as to face an inner peripheral surface of an outer ring of the bearing apparatus. The first elastic member has a thick portion and a thin portion provided on the outer peripheral surface of the first tubular portion. The thick portion is arranged at an end of the first elastic member that is away from the bearing internal space in an axial direction of the bearing apparatus. The thin portion extends from the thick portion toward an end of the first elastic member that is opposite to the thick portion.

First claim

What is claimed is:

1 . A seal for sealing a bearing internal space in a bearing apparatus for a vehicle, the seal comprising:
a core; and a first elastic member, wherein the core includes:
a first tubular portion arranged such that an outer peripheral surface of the first tubular portion faces an inner peripheral surface of an outer ring of the bearing apparatus and extending along an axial direction of the bearing apparatus; and
a first flange portion extending inward from the first tubular portion in a radial direction of the bearing apparatus,
the first elastic member includes:
a thick portion arranged on the outer peripheral surface of the first tubular portion at one of opposite ends, in the axial direction, of the first tubular portion that is away from a bearing internal space, the thick portion being provided along a circumferential direction of the first tubular portion, and
a thin portion extending on the outer peripheral surface of the first tubular portion from the thick portion toward the other end of the first tubular portion in the axial direction and provided along the circumferential direction of the first tubular portion, and
an outer peripheral surface of the thick portion protrudes further outward than an outer peripheral surface of the thin portion in the radial direction, and a thickness of the thin portion in the radial direction is smaller than a thickness of the thick portion in the radial direction.

2 . The seal according to claim 1 , wherein
the thickness of the thin portion in the radial direction is 1/1 to 1/600 of a wall thickness of the first tubular portion.

3 . The seal according to claim 1 , wherein
the first elastic member covers the entire outer peripheral surface of the first tubular portion.

4 . The seal according to claim 2 , wherein
the first elastic member covers the entire outer peripheral surface of the first tubular portion.

5 . The seal according to claim 1 , further comprising:
a slinger; and a second elastic member attached to the slinger, wherein the slinger includes:
a second tubular portion arranged such that an inner peripheral surface of the second tubular portion faces an outer peripheral surface of an inner ring of the bearing apparatus and extending along the axial direction; and
a second flange portion extending outward from the second tubular portion in the radial direction, and
the second elastic member is provided on the inner peripheral surface of the second tubular portion along a circumferential direction of the second tubular portion.

6 . The seal according to claim 2 , further comprising:
a slinger; and a second elastic member attached to the slinger, wherein the slinger includes:
a second tubular portion arranged such that an inner peripheral surface of the second tubular portion faces an outer peripheral surface of an inner ring of the bearing apparatus and extending along the axial direction; and
a second flange portion extending outward from the second tubular portion in the radial direction, and

the second elastic member is provided on the inner peripheral surface of the second tubular portion along a circumferential direction of the second tubular portion.

7 . The seal according to claim 3 , further comprising:
a slinger; and a second elastic member attached to the slinger, wherein the slinger includes:
a second tubular portion arranged such that an inner peripheral surface of the second tubular portion faces an outer peripheral surface of an inner ring of the bearing apparatus and extending along the axial direction; and
a second flange portion extending outward from the second tubular portion in the radial direction, and
the second elastic member is provided on the inner peripheral surface of the second tubular portion along a circumferential direction of the second tubular portion.

8 . The seal according to claim 4 , further comprising:
a slinger; and a second elastic member attached to the slinger, wherein the slinger includes:
a second tubular portion arranged such that an inner peripheral surface of the second tubular portion faces an outer peripheral surface of an inner ring of the bearing apparatus and extending along the axial direction; and
a second flange portion extending outward from the second tubular portion in the radial direction, and
the second elastic member is provided on the inner peripheral surface of the second tubular portion along a circumferential direction of the second tubular portion.

9 . The seal according to claim 5 , wherein
the second elastic member covers the entire inner peripheral surface of the second tubular portion.

10 . The seal according to claim 6 , wherein
the second elastic member covers the entire inner peripheral surface of the second tubular portion.

11 . The seal according to claim 7 , wherein
the second elastic member covers the entire inner peripheral surface of the second tubular portion.

12 . The seal according to claim 8 , wherein
the second elastic member covers the entire inner peripheral surface of the second tubular portion.

13 . The seal according to claim 5 , wherein
a thickness of the second elastic member in the radial direction is 1/1 to 1/600 of a wall thickness of the second tubular portion.

14 . The seal according to claim 6 , wherein
a thickness of the second elastic member in the radial direction is 1/1 to 1/600 of a wall thickness of the second tubular portion.

15 . The seal according to claim 7 , wherein
a thickness of the second elastic member in the radial direction is 1/1 to 1/600 of a wall thickness of the second tubular portion.

16 . The seal according to claim 9 , wherein
a thickness of the second elastic member in the radial direction is 1/1 to 1/600 of a wall thickness of the second tubular portion.

17 . The seal according to claim 10 , wherein
a thickness of the second elastic member in the radial direction is 1/1 to 1/600 of a wall thickness of the second tubular portion.

18 . The seal according to claim 11 , wherein
a thickness of the second elastic member in the radial direction is 1/1 to 1/600 of a wall thickness of the second tubular portion.

19 . A cover for protecting a detection target member attached to a bearing apparatus in order to detect a vehicle wheel rotation speed, the cover comprising:
a cover main body arranged so as to cover the detection target member; a tubular portion connected to the cover main body, extending along an axial direction of the bearing apparatus, and arranged such that an outer peripheral surface of the tubular portion faces an inner peripheral surface of an outer ring of the bearing apparatus; and an elastic member provided on the outer peripheral surface of the tubular portion along a circumferential direction of the tubular portion, wherein a thickness of the elastic member in a radial direction of the bearing apparatus is ⅓ to 1/3,000 of a wall thickness of the tubular portion.

20 . The cover according to claim 19 , wherein
the elastic member covers the entire outer peripheral surface of the tubular portion.

Assignees

• Jtekt Corp

Inventors

• Yonekura Yuji

Classifications

• F16C33/7816

  Details of the sealing or parts thereof, e.g. geometry, material · CPC title

• F16C33/7876 Primary

  with sealing lips · CPC title

• F16C33/7886

  mounted outside the gap between the inner and outer races, e.g. sealing rings mounted to an end face or outer surface of a race · CPC title

• F16C41/007

  Encoders, e.g. parts with a plurality of alternating magnetic poles · CPC title

• F16C19/186

  with three raceways provided integrally on parts other than race rings, e.g. third generation hubs · CPC title