公开(公告)号：US06956367B2

公开(公告)日：2005-10-18

申请号：US10387563

申请日：2003-03-14

申请人： Yoshio Fujikawa ,  Toru Takahashi ,  Yoshitaka Nagano ,  Takashi Koike ,  Kenichi Iwamoto

发明人： Yoshio Fujikawa ,  Toru Takahashi ,  Yoshitaka Nagano ,  Takashi Koike ,  Kenichi Iwamoto

IPC分类号： G01P3/487 ,  F16C41/00 ,  G01D5/14 ,  G01D5/245 ,  G01P3/44 ,  G01B7/30

CPC分类号： G01D5/145 ,  F16C19/06 ,  F16C41/007 ,  G01D5/2457 ,  G01P3/443

摘要： To provide a compact bearing assembly equipped with a rotation sensor capable of detecting not only pulse signals for detecting the number of revolution, but also a home position signal, the bearing assembly equipped with the rotation sensor includes a rotatable member (2) and a non-rotatable member (3) with rolling elements (4) interposed between the rotatable and non-rotatable members (2) and (3) to permit the rotatable member (2) to be rotatable relative to the non-rotatable member (3). The rotatable member (2) is provided with a magnetic encoder (7) and the non-rotatable member (3) is provided with magnetic sensors (8A) to (8C). The magnetic encoder (7) includes first and second to-be-detected elements (7A) and (7B) each having a plurality of equally spaced, opposite magnetic poles defined therein so as to alternate with each other in a direction circumferentially thereof. The first to-be-detected element also has a magnetic characteristic disturbing element (15) provided at a predetermined site on a circumference of the magnetic encoder (7) for agitating a periodicity of the opposite magnetic poles. The two magnetic sensors (8A) and (8B) for detecting the first to-be-detected element (7A) are spaced in a circumferential direction a distance greater than a circumferentially extending width of the disturbing element (15), and are so positioned as to be held in substantially phase-matched relation with a cycle of repetition of the opposite magnetic poles.

摘要翻译： 为了提供一种配有旋转传感器的紧凑型轴承组件，其不仅能够检测用于检测转数的脉冲信号，而且还检测原位置信号，装配有旋转传感器的轴承组件包括可旋转构件（2） 可旋转构件（3），其中滚动元件（4）插入在可旋转和不旋转构件（2）和（3）之间，以允许可旋转构件（2）相对于不可旋转构件（3）旋转。 可旋转构件（2）设置有磁编码器（7），并且不可旋转构件（3）设置有磁传感器（8A）至（8C）。 磁性编码器（7）包括第一和第二待检测元件（7A）和（7B），每个元件具有多个等间隔的相对的磁极，其在其中沿其圆周方向彼此交替 。 第一待检测元件还具有设置在磁性编码器（7）的圆周上的预定位置处的用于搅拌相对磁极的周期性的磁特性干扰元件（15）。 用于检测第一待检测元件（7A）的两个磁传感器（8A）和（8A）在圆周方向上间隔大于扰动元件（15）的周向延伸宽度的距离，以及 被定位成与相对磁极的重复循环保持基本上相位匹配的关系。

公开(公告)号：US20090034887A1

公开(公告)日：2009-02-05

申请号：US12155422

申请日：2008-06-04

申请人： Yoshio Fujikawa ,  Junichi Hirata

发明人： Yoshio Fujikawa ,  Junichi Hirata

IPC分类号： F16C32/06 ,  F16F15/023

CPC分类号： F16C32/0666

摘要： A hydrostatic gas bearing capable of easily adjusting a clearance between a rotor and a radial bearing pad is provided. This hydrostatic gas bearing comprises a radial bearing pad radially supporting a rotor, a linear motion guide moving the radial bearing pad and a ball stud swingably coupling the radial bearing pad to the linear motion guide. The linear motion guide moves the radial bearing pad in a direction intersecting with a direction connecting the center of rotation of the rotor and the ball stud with each other. The quantity of adjustment in movement of the radial bearing pad caused by the linear motion guide is larger than the quantity of change in the clearance between the outer peripheral surface of the rotor and the radial bearing pad, whereby a small quantity of the bearing clearance can be precisely adjusted.

摘要翻译： 提供能够容易地调节转子和径向轴承瓦块之间的间隙的静压气体轴承。 该静压气体轴承包括径向支撑转子的径向轴承瓦块，将径向轴承瓦块移动的直线运动导轨和可将径向轴承瓦块可摆动地连接到直线运动导轨的球形螺柱。 直线运动引导件使径向轴承瓦块沿与将转子的旋转中心和球螺栓相互连接的方向相交的方向移动。 由直线运动引导件引起的径向轴承瓦片的移动调整量大于转子的外周面与径向轴承瓦块之间的间隙的变化量，由此少量的轴承间隙可以 精确调整。

公开(公告)号：US6019515A

公开(公告)日：2000-02-01

申请号：US100109

申请日：1998-06-19

申请人： Shoji Fujii ,  Yoshio Fujikawa

发明人： Shoji Fujii ,  Yoshio Fujikawa

IPC分类号： F16C32/06

CPC分类号： F16C32/0614 ,  F16C32/0696

摘要： An externally pressurized gas bearing assembly including a bearing sleeve fixed in contact with an inner peripheral surface of a housing provided with a gas supply passage communicated with fine feed ports of thrust bearings and opening at an outer peripheral surface of the bearing sleeve through an interior of the bearing sleeve. The bearing sleeve supports a main shaft in an axial direction through an externally pressurized gas by a thrust bearing surface having a plurality of fine feed ports of the thrust bearing.

摘要翻译： 一种外部加压的气体轴承组件，其包括固定成与壳体的内周面接触的轴承套筒，该壳体设置有气体供给通道，该气体供给通道与推力轴承的精细进给口连通，并且在轴承套筒的外周表面处通过内部 轴承套。 轴承套通过具有推力轴承的多个精细进给口的止推轴承表面通过外部加压的气体在轴向方向上支撑主轴。

公开(公告)号：US06848828B2

公开(公告)日：2005-02-01

申请号：US10377757

申请日：2003-03-04

申请人： Hidehiko Nishijima ,  Yoshio Fujikawa

发明人： Hidehiko Nishijima ,  Yoshio Fujikawa

IPC分类号： B05B5/04 ,  B05B7/08 ,  F16C17/12 ,  F16C35/02 ,  F16C32/06

CPC分类号： F16C17/042 ,  B05B5/0415 ,  B05B5/0426 ,  F16C17/024 ,  F16C27/02 ,  F16C43/02

摘要： A foil bearing is provided, which is simple in structure, has a large load capacity and a large damping capability and can therefore allow a rotary shaft having a large unbalance as compared with the conventional bearing to be driven stably at a high speed. A spindle device utilizing such foil bearing is also provided, which is designed to increase the permissible amount of unbalance and also to have a light-weight feature. Each of the foil bearings 504 and 505 includes an elastic member 2 prepared from a wire net formed by braiding wires, and a thin bearing foil 3 supported by the elastic member 2 and defining an elastic bearing surface S. The respective foil bearing 504 and 505 is used at least as a radial bearing 504 in the spindle device including a rotary shaft 4 having a head mount 501a, on which an atomizer head is mounted, and the radial and thrust bearings 504 and 505 for rotatably supporting the rotary shaft 4.

摘要翻译： 提供了一种箔轴承，其结构简单，具有大的负载能力和大的阻尼能力，因此与常规轴承相比可以使得具有大的不平衡的旋转轴能够被高速稳定地驱动。 还提供了利用这种箔片轴承的主轴装置，其被设计成增加容许不平衡量并且还具有轻质特征。 箔片轴承504和505中的每一个包括由由编织线形成的线网制成的弹性构件2和由弹性构件2支撑并限定弹性支承表面S的薄的轴承箔3.各个箔片轴承504和505 至少用作主轴装置中的径向轴承504，其包括具有安装有雾化器头的头部安装件501a的旋转轴4和用于可旋转地支撑旋转轴4的径向和推力轴承504和505。

公开(公告)号：US06524004B2

公开(公告)日：2003-02-25

申请号：US10136392

申请日：2002-05-02

申请人： Yoshio Fujikawa ,  Takayuki Itoh

发明人： Yoshio Fujikawa ,  Takayuki Itoh

IPC分类号： F16C3206

CPC分类号： F16C32/0696 ,  F16C32/0618 ,  F16C32/0622 ,  F16C33/748 ,  F16C2300/62 ,  G11B7/26

摘要： A compact externally pressurized gas bearing spindle assembly can increase the degree of vacuum in a vacuum chamber. In a spindle assembly wherein a rotary shaft is provided in a housing through a bearing gap, and compressed gas is introduced into the bearing gap to support the rotary shaft in a non-contact manner relative to the housing, an exhaust gas suction device for sucking gas discharged from the bearing gap is provided inside the housing or the rotary shaft. The bearing gap near the outside of the housing is smaller than the other bearing gap. Near the bearing gap near the outside of the housing, a non-contact seal gap is formed to prevent leakage of compressed gas into the vacuum chamber in a non-contact manner.

公开(公告)号：US06439773B1

公开(公告)日：2002-08-27

申请号：US09654509

申请日：2000-09-01

申请人： Yoshio Fujikawa ,  Takayuki Itoh

发明人： Yoshio Fujikawa ,  Takayuki Itoh

IPC分类号： F16C3206

CPC分类号： F16C32/0696 ,  F16C32/0618 ,  F16C32/0622 ,  F16C33/748 ,  F16C2300/62 ,  G11B7/26

摘要： A compact externally pressurized gas bearing spindle assembly can increase the degree of vacuum in a vacuum chamber. In a spindle assembly wherein a rotary shaft is provided in a housing through a bearing gap, and compressed gas is introduced into the bearing gap to support the rotary shaft in a non-contact manner relative to the housing, an exhaust gas suction device for sucking gas discharged from the bearing gap is provided inside the housing or the rotary shaft. The bearing gap near the outside of the housing is smaller than the other bearing gap. Near the bearing gap near the outside of the housing, a non-contact seal gap is formed to prevent leakage of compressed gas into the vacuum chamber in a non-contact manner.

公开(公告)号：US5660480A

公开(公告)日：1997-08-26

申请号：US690976

申请日：1996-08-01

申请人： Shoji Fujii ,  Shizuka Yamazaki ,  Yoshio Fujikawa

发明人： Shoji Fujii ,  Shizuka Yamazaki ,  Yoshio Fujikawa

IPC分类号： F16C32/06

CPC分类号： F16C32/0614 ,  F16C32/0696

摘要： An externally pressurized air bearing spindle comprises: a first cylindrical bearing portion having a journal bearing surface opposing an outer circumferential surface of a main shaft with a small journal bearing clearance therebetween, a thrust bearing surface opposing one end surface of a thrust plate disposed on the main shaft with a small thrust bearing clearance therebetween, and plural bearing nozzles formed in the journal bearing surface and the thrust bearing surface and arranged in planes perpendicular to an axis thereof; and a second cylindrical bearing portion having a thrust bearing surface opposing the other end surface of the thrust plate with a small thrust bearing clearance therebetween and plural bearing nozzles formed in the thrust bearing surface and arranged in a plane perpendicular to an axis thereof; the arrangement being such that the main shaft is supported on the bearing surfaces without contact by the action of compressed air fed through the bearing nozzles into the bearing clearances, and that an annular groove is formed between an outer wall of at least one of the first and second bearing portions and an inner wall of an outer case for that one bearing portion so that the bearing nozzles are fed with compressed air from a bearing air feed port formed in the outer case through the annular groove.

摘要翻译： 外部加压的空气轴承主轴包括：第一圆柱形轴承部分，其具有与主轴的外圆周表面相对的轴颈轴承表面，其间具有小的轴颈轴承间隙;止推轴承表面，相对于设置在所述主轴上的止推板的一个端面 主轴，其间具有小的推力轴承间隙;以及多个轴承喷嘴，形成在轴颈轴承表面和止推轴承表面中，并且布置在垂直于其轴线的平面中; 以及第二圆柱形轴承部分，其具有与止推板的另一端面相对的止推轴承表面，其间具有小的止推轴承间隙，并且多个轴承喷嘴形成在推力轴承表面中并且布置在垂直于其轴线的平面中; 所述布置使得所述主轴被支撑在所述轴承表面上，而不被通过所述轴承喷嘴供给的压缩空气的作用接触到所述轴承间隙中，并且在所述第一和第二轴承中的至少一个的外壁之间形成环形槽 以及第二轴承部分和用于该一个轴承部分的外壳的内壁，使得轴承喷嘴从形成在外壳中的轴承空气供给口通过环形槽供给压缩空气。

公开(公告)号：US08052327B2

公开(公告)日：2011-11-08

申请号：US12155422

申请日：2008-06-04

申请人： Yoshio Fujikawa ,  Junichi Hirata

发明人： Yoshio Fujikawa ,  Junichi Hirata

IPC分类号： F16C32/06 ,  F16C17/03

CPC分类号： F16C32/0666

摘要： A hydrostatic gas bearing capable of easily adjusting a clearance between a rotor and a radial bearing pad is provided. This hydrostatic gas bearing comprises a radial bearing pad radially supporting a rotor, a linear motion guide moving the radial bearing pad and a ball stud swingably coupling the radial bearing pad to the linear motion guide. The linear motion guide moves the radial bearing pad in a direction intersecting with a direction connecting the center of rotation of the rotor and the ball stud with each other. The quantity of adjustment in movement of the radial bearing pad caused by the linear motion guide is larger than the quantity of change in the clearance between the outer peripheral surface of the rotor and the radial bearing pad, whereby a small quantity of the bearing clearance can be precisely adjusted.

摘要翻译： 提供能够容易地调节转子和径向轴承瓦块之间的间隙的静压气体轴承。 该静压气体轴承包括径向支撑转子的径向轴承瓦块，将径向轴承瓦块移动的直线运动导轨和可将径向轴承瓦块可摆动地连接到直线运动导轨的球形螺柱。 直线运动引导件使径向轴承瓦块沿与将转子的旋转中心和球螺栓相互连接的方向相交的方向移动。 由直线运动引导件引起的径向轴承瓦片的移动调整量大于转子的外周面与径向轴承瓦块之间的间隙的变化量，由此少量的轴承间隙可以 精确调整。

公开(公告)号：US07066652B2

公开(公告)日：2006-06-27

申请号：US10411077

申请日：2003-04-09

申请人： Yoshio Fujikawa ,  Kiyotaka Kusunoki ,  Kazuyuki Aono ,  Ryu Inoue

发明人： Yoshio Fujikawa ,  Kiyotaka Kusunoki ,  Kazuyuki Aono ,  Ryu Inoue

IPC分类号： F16C32/06

CPC分类号： F16C32/0614

摘要： An externally pressurized gas bearing comprising a main shaft, and journal bearing sections having a plurality of axial gas feed rows each having a plurality of circumferentially equispaced gas feed holes, the gas feed holes in the gas feed rows being adapted to spout compressed gas to thereby rotatably radially support the main shaft in a non-contact state, the externally pressurized gas bearing being arranged so that the gas feed holes in the gas feed row are disposed so as to be positioned circumferentially intermediate between gas feed holes in the adjoining gas feed row.

摘要翻译： 包括主轴和轴颈轴承部分的外部加压气体轴承，所述轴颈轴承部分具有多个轴向气体供给排，每个具有多个周向等间距的气体供给孔，气体供给排中的气体供给孔适于喷射压缩气体，从而 以非接触状态可旋转地径向地支撑主轴，外加压气体轴承被布置成使得气体供给排中的气体供给孔设置成周向位于邻接的气体供给排的气体供给孔之间 。

公开(公告)号：US06581857B2

公开(公告)日：2003-06-24

申请号：US09964630

申请日：2001-09-28

申请人： Shoji Fujii ,  Yoshio Fujikawa

发明人： Shoji Fujii ,  Yoshio Fujikawa

IPC分类号： B05B500

CPC分类号： B05B5/0415 ,  B05B5/04 ,  B05B5/0407 ,  B05B5/0426 ,  F16C32/0622 ,  F16C32/0696

摘要： A spindle for an electrostatic painting machine has a main spindle and a rotor coupled to the rear end of the main spindle. The main spindle and the rotor are rotatably supported through bearing gaps of externally pressurized gas bearing portions, and a paint spray head is mounted to one end of the main spindle. A current-carrying member having conductivity with the housing is brought into contact with the main spindle and floated off it via a small gap due to dynamic pressure produced by the rotation of the main spindle. With this arrangement, it is ensured that discharge occurs at gaps of externally pressurized gas bearing portions, sputtering is suppressed, and the life of the spindle is prolonged.

摘要翻译： 用于静电喷涂机的主轴具有主轴和联接到主轴的后端的转子。 主轴和转子通过外部加压气体轴承部分的轴承间隙可旋转地支撑，并且喷涂头安装在主轴的一端。 具有与壳体的导电性的载流构件与主轴接触并由于主轴的旋转产生的动态压力而通过小的间隙而浮起。 通过这种布置，确保在外部加压气体轴承部分的间隙处发生放电，抑制溅射，延长主轴的寿命。