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公开(公告)号:US20050174001A1
公开(公告)日:2005-08-11
申请号:US11099467
申请日:2005-04-06
申请人: Masatoshi Mizutani , Eiji Tajima , Hisashi Ohtasuki , Takayuki Norimatsu , Koichi Okada , Toru Takahashi , Hiroaki Ohba , Katsuyuki Ikei
发明人: Masatoshi Mizutani , Eiji Tajima , Hisashi Ohtasuki , Takayuki Norimatsu , Koichi Okada , Toru Takahashi , Hiroaki Ohba , Katsuyuki Ikei
CPC分类号: G01P3/443 , F16C19/186 , F16C33/78 , F16C33/7876 , F16C33/7886 , F16C41/004 , F16C41/007 , F16C41/008 , F16C2326/02 , G01P3/487 , H02K7/1846
摘要: To provide a rotation detecting device with a function of transmitting a rotational speed detection signal wireless and enable the rotation detecting device to be assembled compact in size without requiring any anti-rusting treatment to a multi-pole magnet assembly and a magnetic ring assembly, the rotation detecting device includes an electric power generator (11) for generating an electric power by a relative rotation between a non-rotatable member (1) and a rotatable member (7). The electric power generator (11) includes a multi-pole magnet assembly (13) and a magnetic ring assembly (12). A wireless transmission device (14) for transmitting the rotational speed detection signal outputted by the electric power generator (11) is employed. A sealing member (18) is also employed for sealing a working space delimited between the non-rotatable member (1) and the rotatable member (7), and the multi-pole magnet assembly (13) and the magnetic ring assembly (12) of the electric power generator (11) confront with each other at a location inwardly of the sealing member (18). The sealing member (18) is mounted on the magnetic ring assembly (12) or the wireless transmission device (14) of an annular configuration.