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1.发明申请公开(公告)号：US20120063030A1
公开(公告)日：2012-03-15
申请号：US13299542
申请日：2011-11-18
CPC分类号： H02K5/1677 , F16C17/107 , F16C33/103 , F16C33/107 , F16C33/1085 , F16C33/74 , F16C2370/12 , G11B19/2036
摘要： In a fluid dynamic bearing apparatus, an oil buffer is defined between a thrust gap and a pumping gap. The oil buffer has an axial dimension greater than that of the thrust gap, and/or has a radial dimension greater than that of the pumping gap. An air bubble generated in the thrust gap due to cavitation, for example, when a fluid dynamic bearing apparatus experiences a vibration can be dissolved in lubricating oil provided within the oil buffer. This prevents leakage of the lubricating oil due to the air bubble residing in the fluid dynamic bearing apparatus.
摘要翻译： 在流体动力轴承装置中，在推力间隙和泵送间隙之间限定油缓冲器。 油缓冲器的轴向尺寸大于推力间隙的轴向尺寸，和/或具有大于泵送间隙的径向尺寸的径向尺寸。 例如当流体动力轴承装置发生振动时，在推力间隙产生的推力间隙中产生的气泡可以溶解在设置在油缓冲器内的润滑油中。 这样可以防止润滑油由于存在于流体动力轴承装置中的气泡而泄漏。
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2.发明申请公开(公告)号：US20110019303A1
公开(公告)日：2011-01-27
申请号：US12899658
申请日：2010-10-07
CPC分类号： H02K5/1677 , F16C17/107 , F16C33/1085 , F16C33/745 , F16C2370/12 , G11B19/2036 , H02K7/086
摘要： In a spindle motor, a capillary seal portion having a radial dimension that decreases in an axially downward direction, and a labyrinth seal portion arranged above the capillary seal portion are defined between an outer circumferential surface of a rotating member and an inner circumferential surface of a tubular portion. The capillary seal portion includes a liquid surface of a lubricating oil positioned therewithin. The radial dimension of the labyrinth seal portion is smaller than the radial dimension of an upper end portion of the capillary seal portion, so that the labyrinth seal portion contributes to reducing evaporation of the lubricating oil.
摘要翻译： 在主轴电动机中，在旋转部件的外周面和旋转部件的内周面之间形成有沿轴向向下方向减小的径向尺寸的毛细管密封部和布置在毛细管密封部的上方的迷宫式密封部， 管状部分。 毛细管密封部分包括位于其中的润滑油的液面。 迷宫式密封部的径向尺寸小于毛细管密封部的上端部的径向尺寸，因此迷宫式密封部有助于减少润滑油的蒸发。
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3.发明申请FLUID DYNAMIC BEARING MECHANISM INCLUDING COMMUNICATING CHANNEL, SPINDLE MOTOR, AND DISK DRIVE APPARATUS 有权流体动力轴承机构，包括通信通道，主轴电机和磁盘驱动器公开(公告)号：US20120092788A1
公开(公告)日：2012-04-19
申请号：US13034778
申请日：2011-02-25
CPC分类号： H02K5/1675 , F16C17/045 , F16C17/107 , F16C33/1085 , F16C33/745 , F16C2370/12 , G11B19/2036 , H02K7/085
摘要： A fluid dynamic bearing mechanism includes a stationary bearing portion including a sleeve portion, and a rotating bearing portion including an outer rotating portion. A lubricating oil is arranged between the stationary and rotating bearing portions. A first dynamic pressure groove array is arranged in an upper surface of the sleeve portion or a lower surface of the outer rotating portion. A second dynamic pressure groove array is arranged in a surface of the outer rotating portion or a surface of the stationary bearing portion in a region between the first array and a liquid surface. An end of the second array closer to the liquid surface is arranged radially inward of an opposite end of the second array. An upper end opening of a communicating channel defined in the sleeve portion is arranged radially outward of a radially inner end of the first array.
摘要翻译： 流体动力轴承机构包括具有套筒部分的固定轴承部分和包括外部旋转部分的旋转轴承部分。 润滑油布置在固定轴承部分和旋转轴承部分之间。 第一动压槽阵列布置在套筒部分的上表面或外旋转部分的下表面中。 第二动压槽阵列布置在第一阵列和液体表面之间的区域中的外旋转部分的表面或固定轴承部分的表面中。 更靠近液面的第二阵列的端部布置在第二阵列的相对端的径向内侧。 限定在套筒部分中的连通通道的上端开口布置在第一阵列的径向内端的径向外侧。
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公开(公告)号：US20120033328A1
公开(公告)日：2012-02-09
申请号：US13198793
申请日：2011-08-05
申请人： Junya MIZUKAMI , Takayuki OE , Yoichi SEKII , Naoki SABASHI , Hideki NISHIMURA , Takehito TAMAOKA , Takashi YAMAMOTO
发明人： Junya MIZUKAMI , Takayuki OE , Yoichi SEKII , Naoki SABASHI , Hideki NISHIMURA , Takehito TAMAOKA , Takashi YAMAMOTO
CPC分类号： H02K7/085 , F16C17/107
摘要： A spindle motor includes a stationary portion and a rotating portion. The stationary portion preferably includes a shaft portion, an upper thrust portion, and an outer tubular portion. The rotating portion preferably includes an inner tubular portion, a flange portion, an upper hub annular portion, and a lower hub annular portion. The flange portion includes a communicating hole. An upper surface of a lubricating oil is located in a fifth gap defined between an upper thrust portion and an upper hub annular portion, while a lower surface of the lubricating oil is located in a sixth gap defined between an outer tubular portion and a lower hub annular portion. The communicating hole and a space extending from the fifth gap to the sixth gap through a fourth gap, a first gap, a second gap, and a third gap are continuously filled with the lubricating oil.
摘要翻译： 主轴电动机包括固定部分和旋转部分。 固定部分优选地包括轴部分，上推力部分和外管状部分。 旋转部分优选包括内部管状部分，凸缘部分，上部轮毂环形部分和下部轮毂环形部分。 凸缘部包括连通孔。 润滑油的上表面位于限定在上推力部分和上轮毂环部分之间的第五间隙中，而润滑油的下表面位于限定在外管状部分和下轮毂之间的第六间隙中 环形部分。 连通孔和通过第四间隙，第一间隙，第二间隙和第三间隙从第五间隙延伸到第六间隙的空间连续地填充有润滑油。
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公开(公告)号：US20120033325A1
公开(公告)日：2012-02-09
申请号：US13198776
申请日：2011-08-05
申请人： Junya MIZUKAMI , Takayuki OE , Yoichi SEKII , Naoki SABASHI , Hideki NISHIMURA , Takehito TAMAOKA , Takashi YAMAMOTO
发明人： Junya MIZUKAMI , Takayuki OE , Yoichi SEKII , Naoki SABASHI , Hideki NISHIMURA , Takehito TAMAOKA , Takashi YAMAMOTO
CPC分类号： H02K7/085 , F16C17/105 , F16C17/107 , F16C33/745 , F16C2370/12 , G11B19/2036 , G11B33/1473
摘要： A dynamic pressure bearing is defined in a first gap between a shaft portion and a sleeve portion. An upper seal portion extending upward and a lower seal portion extending downward are arranged radially outward of the dynamic pressure bearing. Each of the upper seal portion and the lower seal portion includes a surface including a lubricating oil located therein. The upper seal portion and the lower seal portion are arranged in communication with each other through a communicating hole defined in the sleeve portion. The communicating hole and a space ranging from the upper seal portion to the lower seal portion through the first gap are filled with the lubricating oil. The axial distance between the surfaces of the lubricating oil in the upper seal portion and the lower seal portion is arranged to be shorter than the axial distance between an upper end and a lower end of the dynamic pressure bearing.
摘要翻译： 在轴部和套筒部之间的第一间隙中限定动态压力轴承。 向上延伸的上密封部分和向下延伸的下密封部分设置在动压轴承的径向外侧。 上密封部分和下密封部分中的每一个包括其中包括润滑油的表面。 上密封部分和下密封部分通过限定在套筒部分中的连通孔彼此连通。 连通孔和通过第一间隙从上密封部到下密封部的空间填充有润滑油。 上密封部中的润滑油的表面与下部密封部之间的轴向距离比动压轴承的上端和下端的轴向距离短。
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公开(公告)号：US20120033329A1
公开(公告)日：2012-02-09
申请号：US13198794
申请日：2011-08-05
申请人： Junya MIZUKAMI , Takayuki OE , Yoichi SEKII , Naoki SABASHI , Takehito TAMAOKA , Takashi YAMAMOTO , Shigeki HORIKI , Kazushi MIURA , Mitsuhiro TAKEMOTO
发明人： Junya MIZUKAMI , Takayuki OE , Yoichi SEKII , Naoki SABASHI , Takehito TAMAOKA , Takashi YAMAMOTO , Shigeki HORIKI , Kazushi MIURA , Mitsuhiro TAKEMOTO
IPC分类号： G11B17/028 , H02K7/08
CPC分类号： G11B25/043 , F16C17/107 , F16C33/745 , F16C2370/12 , G11B19/2036 , H02K5/1675
摘要： In a motor, an annular radially extending gap is defined between an outer annular surface and a lower surface of an annular cover portion. The radially extending gap has an axial width smaller than a maximum width of an upper seal portion defined between an outer circumferential surface of an upper thrust portion and an inner circumferential surface of a tubular portion. An annular axially extending gap is defined between an inner cylindrical surface and a radially inner edge of the annular cover portion. The axially extending gap has a radial width smaller than the maximum width of the upper seal portion.
摘要翻译： 在电动机中，环形径向延伸的间隙限定在环形盖部分的外环形表面和下表面之间。 径向延伸间隙的轴向宽度小于限定在上推力部分的外圆周表面和管状部分的内圆周表面之间的上密封部分的最大宽度。 环形轴向延伸的间隙限定在环形盖部分的内圆柱表面和径向内边缘之间。 轴向延伸间隙的径向宽度小于上密封部分的最大宽度。
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公开(公告)号：US20120033327A1
公开(公告)日：2012-02-09
申请号：US13198787
申请日：2011-08-05
申请人： Junya MIZUKAMI , Takayuki OE , Yoichi SEKII , Naoki SABASHI , Hideki NISHIMURA , Takehito TAMAOKA , Takashi YAMAMOTO
发明人： Junya MIZUKAMI , Takayuki OE , Yoichi SEKII , Naoki SABASHI , Hideki NISHIMURA , Takehito TAMAOKA , Takashi YAMAMOTO
CPC分类号： H02K7/085 , F16C17/107 , F16C33/745 , F16C2370/12 , G11B25/043 , G11B33/1473
摘要： A motor includes a stationary portion and a rotating portion. The rotating portion includes a sleeve portion. The sleeve portion includes a communicating hole. A dynamic pressure bearing is defined in a first gap between a shaft portion and the sleeve portion. An upper seal portion and a lower seal portion are arranged radially outward of the dynamic pressure bearing. The upper seal portion and the lower seal portion are arranged in communication with each other through the communicating hole. The communicating hole and a space extending from the upper seal portion to the lower seal portion through the first gap are filled with a lubricating oil. A fixing region where an outer tubular portion and a base portion are fixed to each other is arranged to overlap with the dynamic pressure bearing in a radial direction in plan view.
摘要翻译： 电动机包括固定部分和旋转部分。 旋转部分包括套筒部分。 套筒部分包括连通孔。 在轴部和套筒部之间的第一间隙中限定动态压力轴承。 上密封部分和下密封部分布置在动压轴承的径向外侧。 上密封部分和下密封部分通过连通孔彼此连通。 连通孔和通过第一间隙从上密封部分延伸到下密封部分的空间填充有润滑油。 在外观管状部和基部彼此固定的固定区域在俯视图中与动压轴承重合。
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公开(公告)号：US20120033326A1
公开(公告)日：2012-02-09
申请号：US13198784
申请日：2011-08-05
申请人： Junya MIZUKAMI , Takayuki OE , Yoichi SEKII , Naoki SABASHI , Hideki NISHIMURA , Takehito TAMAOKA , Takashi YAMAMOTO
发明人： Junya MIZUKAMI , Takayuki OE , Yoichi SEKII , Naoki SABASHI , Hideki NISHIMURA , Takehito TAMAOKA , Takashi YAMAMOTO
CPC分类号： H02K7/085 , F16C17/107 , F16C33/745 , F16C2370/12 , G11B19/2036 , G11B33/1473
摘要： A spindle motor includes a stationary portion and a rotating portion. The stationary portion preferably includes a shaft portion, a lower plate portion, and an outer tubular portion. The rotating portion preferably includes an inner tubular portion and a flange portion including a communicating hole. An upper seal portion is arranged radially outward of a first gap, and a lower seal portion is arranged radially outward of a second gap. The upper and lower seal portions are arranged in communication with each other through the communicating hole. The communicating hole and a space extending from the upper seal portion to the lower seal portion through the first gap, the second gap, and a third gap are filled with a lubricating oil. The third gap includes a dynamic pressure generation portion arranged to produce a radially inward pressure acting on the lubricating oil.
摘要翻译： 主轴电动机包括固定部分和旋转部分。 固定部优选地包括轴部，下板部和外筒部。 旋转部分优选地包括内管状部分和包括连通孔的凸缘部分。 上密封部分布置在第一间隙的径向外侧，并且下密封部分布置在第二间隙的径向外侧。 上密封部分和下密封部分通过连通孔彼此连通。 连通孔和通过第一间隙，第二间隙和第三间隙从上密封部分延伸到下密封部分的空间填充有润滑油。 第三间隙包括设置成产生作用在润滑油上的径向向内的压力的动压产生部分。
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公开(公告)号：US20100321823A1
公开(公告)日：2010-12-23
申请号：US12793851
申请日：2010-06-04
申请人： Takayuki OE , Teiichi HIRONO , Kunio SAKURADA , Junya MIZUKAMI
发明人： Takayuki OE , Teiichi HIRONO , Kunio SAKURADA , Junya MIZUKAMI
CPC分类号： F16C33/745 , F16C17/107 , F16C33/103 , F16C33/107 , F16C2370/12 , G11B19/2036
摘要： A bearing apparatus includes a shaft, a thrust cup including an annular potion and a cylindrical portion, a rotating member including a through hole defined therein, and a lubricating oil. A second gap defined between a lower surface of the rotating member and an upper surface of the annular portion of the thrust cup includes a first region in communication with a capillary seal portion, and a second region positioned radially inward of the first region and having an axial dimension smaller than that of the first region. A lower end portion of the through hole is open at a location radially outwardly away from a boundary between the first and second regions, so that a local circulation of the lubricating oil arises within the first region during rotation of the rotating member.
摘要翻译： 轴承装置包括轴，包括环形部分的推力杯和圆柱形部分，包括限定在其中的通孔的旋转构件和润滑油。 限定在旋转构件的下表面和推力杯的环形部分的上表面之间的第二间隙包括与毛细管密封部分连通的第一区域和位于第一区域的径向内侧的第二区域，并且具有 轴向尺寸小于第一区域的尺寸。 通孔的下端部在径向向外远离第一和第二区域之间的边界的位置处开口，使得在旋转构件旋转期间润滑油的局部循环在第一区域内产生。
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公开(公告)号：US20120033330A1
公开(公告)日：2012-02-09
申请号：US13198797
申请日：2011-08-05
申请人： Junya MIZUKAMI , Takayuki OE , Yoichi SEKII , Naoki SABASHI , Takehito TAMAOKA , Takashi YAMAMOTO , Kazunori USUI , Akira MUKAI
发明人： Junya MIZUKAMI , Takayuki OE , Yoichi SEKII , Naoki SABASHI , Takehito TAMAOKA , Takashi YAMAMOTO , Kazunori USUI , Akira MUKAI
CPC分类号： F16C17/107 , F16C33/745 , F16C2370/12 , H02K5/1677
摘要： In a motor, a stationary portion includes a shaft portion and an upper thrust portion arranged to define a single continuous monolithic member together with the shaft portion, and arranged to extend radially outward from an upper portion of the shaft portion. The shaft portion includes a female screw portion recessed axially downward from an upper end thereof. An upper end of the single continuous monolithic member defined by the shaft portion and the upper thrust portion includes an upper end annular surface arranged to extend radially outward from the female screw portion perpendicularly or substantially perpendicularly to the central axis. An outside diameter of the upper end annular surface is greater than a diameter of an outer circumferential surface of the shaft portion.
摘要翻译： 在电动机中，固定部分包括轴部分和上推力部分，所述上部推力部分布置成与所述轴部分一起限定单个连续的整体部件，并且被布置成从所述轴部分的上部径向向外延伸。 轴部包括从其上端轴向向下凹陷的阴螺纹部。 由所述轴部分和所述上推力部分限定的所述单个连续整体构件的上端包括上端环形表面，所述上端环形表面布置成垂直地或基本垂直于所述中心轴线从所述内螺纹部分径向向外延伸。 上端环状面的外径大于轴部的外周面的直径。
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