| 摘要 |
<p>[PROBLEMS] To provide a bearing unit for a wheel in which rusting is prevented by enhancing hermetic sealing performance between an outer member and a knuckle. [MEANS FOR SOLVING PROBLEMS] The inner side seal (9) consists of annular slinger (11) and sealing plate (12) with substantially L-shaped cross-sections press fitted, respectively, in the inner ring (3) and an outer member (10) and arranged oppositely, wherein the sealing plate (12) consists of a core metal (13) and a sealing member (14) bonded to the core metal (13) and having a plurality of seal lips sliding on the slinger (11). In such a bearing unit for a wheel, an outer circumferential lip (17) having a hooked cross-section and extending radially outward is formed at the outer circumferential part of the sealing member (14), the outer circumferential lip (17) is arranged to be fitted in the gap (e) between the outer member (10) and the flange (18) of a knuckle (N), with the diameter d at the top (17a) of the outer circumferential lip (17) set larger than the outside diameter D at the inside diameter chamfered portion (18a) of the flange (18), and the outer circumferential lip (17) abuts against the flange (18) with a hooking margin d of f0.1 or more.</p> |
