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Title:
WHEEL BARING DEVICE
Document Type and Number:
Japanese Patent JP2017048809
Kind Code:
A
Abstract:
PROBLEM TO BE SOLVED: To provide a wheel bearing device which is elongated in a life of a bearing by enhancing the sealing performance of a seal without increasing seal torque.SOLUTION: A seal 8 comprises: a core grid 15 which is pressure-inserted into an internal periphery of an end part of an outer member 10; a first side lip 16a which is joined to the core grid, inclined to the outside of a radial direction, and opposes a metal ring 17 which is attached to a base part 18 of a wheel attachment flange 4 with a clearance in an axial direction; a second side lip 16b which is formed at an inside diameter side of the first side lip, and slide-contacts with the first side lip with a fastening margin in the axial direction; and a third side lip 19a which is inclined to the outside of a radial direction toward the wheel attachment flange 4 from the base part 19 which covers an outer surface of an outer edge of the core grid 15. A tip of the core grid is formed flat, and opposes a side face 4b of the wheel attachment flange 4 with a clearance in the axial direction, a first labyrinth seal 20 is constituted, and an outer edge of the metal seal 17 opposes a seal member 16 with a clearance in the axial direction, thus forming a labyrinth seal 25.SELECTED DRAWING: Figure 2

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Inventors:
TADA MIKIHIRO
MITSUISHI TADASHI
Application Number:
JP2015170411A
Publication Date:
March 09, 2017
Filing Date:
August 31, 2015
Export Citation:
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Assignee:
NTN TOYO BEARING CO LTD
International Classes:
F16C33/80; B60B35/02; B60B35/18; F16C19/18; F16C33/78; F16J15/3204; F16J15/447
Attorney, Agent or Firm:
越川 隆夫



 
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