PROBLEM TO BE SOLVED: To provide a bearing device for a wheel which prevents the separation of a seal at the assembling of the seal, prevents a failure of pressure-insertion by suppressing an inclination of the seal, and is improved in reliability.SOLUTION: A bearing device for a wheel comprises: a seal pressure-insertion part 23 in which a seal 9 is pressure-inserted into a deep position at an outer side rather than an end face 10c at an inner side at an internal periphery of an end face of an outer member 10; and a pressure-insertion guide part 24 which is formed larger in diameter than the seal pressure-insertion part 23 at the inner side via a step 23a from the seal pressure-insertion part 23. A tip of a fitting part 19a of a core grid 19 is formed thin in thickness, a seal member 20 is joined to the tip so as to cover the tip while wrapping around the tip, a nose part 21 larger in diameter than an outside diameter of the fitting part 19a is formed at an external peripheral face of the seal member, an interference d between the nose part 21 and the pressure-insertion part 24 is set at 0.1 to 0.2 mm in diameter, and a radial clearance S between the fitting part 19a of the core grid 19 and the pressure-insertion part 24 is set at 0 to 0.3 mm in diameter.
車輪用軸受装置
2018-09-26
Patent
Elektronische Ressource
Japanisch