公开(公告)号：US08358483B2

公开(公告)日：2013-01-22

申请号：US12873430

申请日：2010-09-01

申请人： Yoichi Sekii ,  Hirokazu Shirai ,  Junya Mizukami ,  Kazuyoshi Saito ,  Hideki Nishimura ,  Atsushi Yawata

发明人： Yoichi Sekii ,  Hirokazu Shirai ,  Junya Mizukami ,  Kazuyoshi Saito ,  Hideki Nishimura ,  Atsushi Yawata

IPC分类号： G11B19/20 ,  H02K5/24

CPC分类号： G11B19/2027 ,  G11B19/2009 ,  H02K5/24 ,  H02K7/085 ,  H02K7/09

摘要： A stationary portion of a spindle motor includes a base member and a magnetic member. The magnetic member is arranged below a magnet and fixed to the base member. The magnetic member includes an annular plate portion arranged on an upper surface of the base member, and a projecting portion arranged to extend from the plate portion in an axial direction. At least a portion of the projecting portion is press fitted to a wall surface of the base member.

摘要翻译： 主轴电动机的固定部分包括基座部件和磁性部件。 磁性构件布置在磁体下方并固定到基座构件。 磁性构件包括布置在基底构件的上表面上的环形板部分和布置成沿轴向从板部延伸的突出部分。 突出部分的至少一部分压配合到基部构件的壁表面。

公开(公告)号：US08169738B1

公开(公告)日：2012-05-01

申请号：US13034778

申请日：2011-02-25

申请人： Atsushi Yawata ,  Yoichi Sekii ,  Junya Mizukami ,  Tetsuya Maruyama ,  Hirofumi Kojima

发明人： Atsushi Yawata ,  Yoichi Sekii ,  Junya Mizukami ,  Tetsuya Maruyama ,  Hirofumi Kojima

IPC分类号： G11B19/20

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。

公开(公告)号：US08810095B2

公开(公告)日：2014-08-19

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

IPC分类号： H02K5/167 ,  F16C17/10 ,  H02K7/08 ,  G11B33/14 ,  G11B19/20

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布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。

公开(公告)号：US08823230B2

公开(公告)日：2014-09-02

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

IPC分类号： H02K5/167 ,  G11B33/14 ,  G11B25/04 ,  H02K7/08

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。

公开(公告)号：US08810096B2

公开(公告)日：2014-08-19

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

IPC分类号： H02K5/167 ,  H02K7/08 ,  G11B19/20 ,  G11B33/14

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。

公开(公告)号：US08379345B2

公开(公告)日：2013-02-19

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

IPC分类号： G11B17/08

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。

公开(公告)号：US08520335B2

公开(公告)日：2013-08-27

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

IPC分类号： G11B17/02 ,  H02K5/16

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。

公开(公告)号：US08385017B2

公开(公告)日：2013-02-26

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： G11B17/02 ,  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形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。

公开(公告)号：US20100296190A1

公开(公告)日：2010-11-25

申请号：US12742931

申请日：2009-05-26

申请人： Hiroki Yamada ,  Junya Mizukami ,  Tsuyoshi Morita ,  Tetsuya Maruyama ,  Takuro Iguchi

发明人： Hiroki Yamada ,  Junya Mizukami ,  Tsuyoshi Morita ,  Tetsuya Maruyama ,  Takuro Iguchi

IPC分类号： G11B17/00 ,  F16C32/06 ,  H02K7/08

CPC分类号： F16C33/745 ,  F16C17/107 ,  F16C2370/12 ,  G11B19/2036 ,  H02K7/086

摘要： A fluid dynamic bearing apparatus includes a first minute gap, a second minute gap, a third minute gap, a fourth minute gap, and a fifth minute gap. A flow of a lubricating oil from the fifth minute gap to the fourth minute gap is caused by a plurality of dynamic pressure generating grooves arranged within the fluid dynamic bearing apparatus. This flow causes air bubbles mixed in the lubricating oil within the fifth minute gap to flow toward the third minute gap and be discharged to an outside through the third minute gap. In addition, a flow of the lubricating oil into the third minute gap caused by a centrifugal force accompanying rotation is inhibited.

摘要翻译： 流体动力轴承装置包括第一微小间隙，第二微小间隙，第三微小间隙，第四微小间隙和第五微小间隙。 润滑油从第五分钟间隙到第四微小间隙的流动由布置在流体动力轴承装置内的多个动压产生槽引起。 该流动使第五分钟间隙内的润滑油中混合的气泡朝向第三微小间隙流动，并通过第三微小间隙排出到外部。 此外，抑制由伴随旋转的离心力引起的润滑油流入第三微小间隙的流动。

公开(公告)号：US07201517B2

公开(公告)日：2007-04-10

申请号：US10872976

申请日：2004-06-18

申请人： Masato Gomyo ,  Masayoshi Saichi ,  Shingo Suginobu ,  Junya Mizukami ,  Yoshitaka Murayama

发明人： Masato Gomyo ,  Masayoshi Saichi ,  Shingo Suginobu ,  Junya Mizukami ,  Yoshitaka Murayama

IPC分类号： F16C32/06

CPC分类号： G11B19/2018 ,  F16C17/026 ,  F16C17/105 ,  F16C33/107 ,  F16C33/1085 ,  F16C2370/12

摘要： A hydrodynamic bearing device comprises a shaft bush having a substantially conical inclined dynamic pressure surface around the outer circumference thereof which is relatively rotatably inserted in a bearing sleeve having a substantially conical inclined dynamic pressure surface around the inner circumference thereof. A substantially conical inclined bearing space is created in the gap between the inclined dynamic pressure surfaces of the bearing sleeve and shaft bush. Lubricant fluid is filled inside the inclined bearing space. A proper dynamic pressure generating means is formed on at least one of the inclined dynamic pressure surfaces of the shaft bush and bearing sleeve. The lubricant fluid is pressurized by the dynamic pressure generating means to generate dynamic pressure, by which the shaft bush and the bearing sleeve are relatively elevated in the radial and thrust directions so that their rotations are supported in a non-contact manner. A fluid sealing portion is provided in the inclined bearing space to prevent the lubricant fluid from leaking outside of the inclined bearing space. A fluid pressurizing means is provided between the inclined bearing space and the fluid sealing portion to pressurize the lubricant fluid in the direction to push it toward the inside of the inclined bearing space.

摘要翻译： 一种流体动力轴承装置包括轴套，该轴套具有围绕其外圆周的基本圆锥形的倾斜动态压力表面，其相对可旋转地插入到具有围绕其内圆周的基本上圆锥形的倾斜动态压力表面的轴承套筒中。 在轴承套筒和轴套的倾斜动态压力表面之间的间隙中形成大致圆锥形的倾斜轴承空间。 润滑油填充在倾斜轴承空间内。 在轴衬和轴承套的至少一个倾斜动态压力表面上形成适当的动压产生装置。 润滑剂流体被动态压力产生装置加压以产生动态压力，通过该动压力，轴套和轴承套筒在径向和推力方向上相对地升高，使得它们的旋转以非接触的方式被支撑。 流体密封部设置在倾斜轴承空间中，以防止润滑剂流体泄漏到倾斜轴承空间的外部。 流体加压装置设置在倾斜支承空间和流体密封部分之间，以朝向倾斜轴承空间的内部的方向对润滑剂流体加压。