公开(公告)号：US20140097717A1

公开(公告)日：2014-04-10

申请号：US14029072

申请日：2013-09-17

申请人： MINEBEA CO., LTD.

发明人： Jun HATCHO ,  Hideo FUJIURA

IPC分类号： F16C32/06 ,  H02K7/08

CPC分类号： F16C32/0629 ,  F16C17/026 ,  F16C33/121 ,  F16C2204/16 ,  F16C2210/00 ,  F16C2370/12 ,  G11B19/2036 ,  H02K7/08 ,  H02K7/085

摘要： There is provided a fluid dynamic pressure bearing apparatus including a shaft, a bearing sleeve rotatably supporting the shaft, and a lubricating oil filled between the shaft and the bearing sleeve, wherein at least one of the shaft and the bearing sleeve is formed of a copper alloy containing 0.8 wt % to 5 wt % of lead, and a base oil of the lubricating is a member selected from the group consisting of monoester, dibasic acid diester, diol ester and mixtures thereof, and the lubricating oil contains 0.1 wt % to 1 wt % of condensed phosphate ester. The fluid dynamic pressure bearing apparatus is capable of suppressing the hydrolysis of the lubricating oil, and the wear of the shaft and the bearing sleeve.

摘要翻译： 提供了一种流体动压轴承装置，其包括轴，可旋转地支撑轴的轴承套和填充在轴和轴承套之间的润滑油，其中轴和轴承套中的至少一个由铜形成 含有0.8重量％〜5重量％的铅的合金，润滑油的基础油是选自单酯，二元酸二酯，二醇酯及其混合物的成分，润滑油含有0.1重量％〜1重量％ wt％的缩合磷酸酯。 流体动压轴承装置能够抑制润滑油的水解，以及轴和轴承套的磨损。

公开(公告)号：US20140314351A1

公开(公告)日：2014-10-23

申请号：US14228922

申请日：2014-03-28

申请人： Minebea Co., Ltd.

发明人： Hideo FUJIURA ,  Jun HATCHO

IPC分类号： F16C32/06 ,  C10M105/36

CPC分类号： C10M105/36 ,  C10M105/38 ,  C10M137/04 ,  C10M2207/127 ,  C10M2207/2835 ,  C10M2215/064 ,  C10M2215/223 ,  C10M2223/04 ,  C10M2223/041 ,  C10N2230/02 ,  C10N2230/06 ,  C10N2230/08 ,  C10N2230/10 ,  C10N2230/74 ,  C10N2240/02 ,  F16C17/107 ,  F16C33/109 ,  F16C2300/40 ,  F16C2370/12 ,  G11B19/2036

摘要： It is provided a long life spindle motor that is excellent in startup characteristic in low-temperature environments such as 0° C., and that startup problems due to the evaporation or deterioration of lubricating oil can be avoided in high-temperature environments. The spindle motor includes a fluid dynamic bearing filled with a lubricating oil, containing a methyl pentanediol diester obtained by esterifying 3-methyl-1,5-pentanediol with n-decanoic acid and n-undecanoic acid at a molar ratio ranging from 90:10 to 20:80, and having a water content of not more than 1000 ppm.

摘要翻译： 提供了在0℃等低温环境下起动特性优异的寿命长的主轴电动机，并且在高温环境下可以避免由于润滑油的蒸发或劣化引起的启动问题。 主轴电动机包括填充有润滑油的流体动力轴承，其含有通过使3-甲基-1,5-戊二醇与正癸酸和正十一烷酸以90:10的摩尔比酯化而获得的甲基戊二醇二酯 至20:80，含水量不大于1000ppm。