发明名称 |
Hydraulic dynamic bearing and spindle motor |
摘要 |
In order to alleviate mutual interference between axial dynamic pressure portions and a radial dynamic pressure portion in a ring-like hydraulic dynamic pressure bearing, in the case of a ring-like hydraulic dynamic pressure bearing 1 constituted by supporting a shaft portion 4 constituted by fixing a ring 3 to an end portion 2A of a shaft main body 2 by a bearing portion 5, ring-like spaces 8 and 9 for storing lubricant for generating dynamic pressure are provided along contiguous portions of the radial dynamic pressure bearing portion and the axial dynamic pressure bearing portions formed between the ring 3 and the bearing portion 5, and the ring-like spaces 8 and 9 are maintained at atmospheric pressure via paths formed at the bearing portion 5 to thereby prevent negative pressure from generating at boundary regions of the two dynamic pressure bearing portions.
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申请公布号 |
US6354742(B1) |
申请公布日期 |
2002.03.12 |
申请号 |
US20000535376 |
申请日期 |
2000.03.24 |
申请人 |
SEIKO INSTRUMENTS INC. |
发明人 |
IWAKI TADAO;OHKI SHIGERU;KAWAWADA NAOKI;OHTA ATSUSHI;NITADORI KOJI;TAKEHARA ISAMU;GOTO HIROMITSU;SUZUKI TAKAFUMI |
分类号 |
H02K7/08;F16C17/10;F16C33/10;G11B19/20;H02K5/16;H02K21/22;(IPC1-7):F16C32/06 |
主分类号 |
H02K7/08 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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