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专利名称：Rolling bearing unit with a rotational speed
sensor
发明人：Ouchi, Hideo申请号：EP95113622.5申请日：19950830公开号：EP0714029A3公开日：19980121
专利附图：
摘要：A rolling-bearing unit having a rotational speed sensor (14d) comprising a pairof annular or cylindrical permanent magnets (35a, 35b) concentric with the rotating ring(4), an annular or cylindrical stator (36) of magnetic material magnetically connected with
permanent magnets (35a, 35b) and provided concentric with the rotating ring (4), and anannular or cylindrical coil (37) provided concentric with the rotating ring (4) and in thecentral portion of the stator (36), wherein the ends in magnetic orientation of the pair ofpermanent magnets (35a, 35b) are provided to have the same pole faced to the cuttingsection (21) of the tone wheel (11b) with a small clearance (23) therebetween, and, theends of the pair of permanent magnets (35a, 35b) are formed with recesses protrusionswith the same pitch as in the cutout section (21) of the tone wheel (11b), and wherein thephase of the recesses protrusions formed in one of the ends relative to the cutoutsection (21) is half displaced from the phase of the recesses protrusions formed in theother of the ends relative to the cutout section (21).
申请人：NSK LTD
地址：6-3 Ohsaki 1-chome Shinagawa-ku, Tokyo JP
国籍：JP
代理机构：Füchsle, Klaus, Dipl.-Ing.
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