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公开(公告)号：EP4282563A1
公开(公告)日：2023-11-29
申请号：EP21921349.3
申请日：2021-12-23
申请人： NSK Ltd.
摘要： A main spindle device and a method for manufacturing the main spindle device of which a long lifespan is achieved by stably maintaining an amount of grease in a bearing for a long period and increasing the grease lifespan without needing a long running-in time are provided. In a main spindle device (100), outer rings (41 and 21) of roller bearings (40 and 20) include base oil supply holes (47 and 27) penetrating in a radial direction and a housing (103) includes grease paths (133a) to (133e) communicating with the base oil supply holes (47 and 27). Grease is sealed inside bearing spaces of the roller bearings (40 and 20). During running of the main spindle device (100), the grease paths (133a) to (133e) form grease reservoirs.
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公开(公告)号：EP3112714B1
公开(公告)日：2018-05-02
申请号：EP15754847.0
申请日：2015-02-26
申请人： NSK Ltd.
IPC分类号： B23B19/02 , B23Q11/12 , F16C19/54 , F16C35/12 , F16C37/00 , H02K5/16 , H02K5/173 , H02K5/20 , H02K9/19
CPC分类号： F16C35/077 , B23Q1/70 , B23Q11/123 , B23Q11/127 , F16C19/547 , F16C33/768 , F16C35/12 , F16C37/007 , F16C2322/39 , H02K5/1732 , H02K5/20 , H02K9/19
摘要： The present invention pertains to a spindle device provided with cooling channels (40, etc.) that face each other and that allow a cooling medium to flow between the outer peripheral surface of a bearing sleeve (16) in which a free-side bearing (14) is fitted and the inner peripheral surface of a housing (33), the cooling channels (40) being provided with a plurality of annular grooves (41) formed in the outer peripheral surface of the bearing sleeve (16) or the inner peripheral surface of the housing (33), each of the annular grooves (41) being aligned in an axial direction, and slits (42) formed in at least one location between adjacent annular grooves (41), the slits (42) enabling adjacent annular grooves (41) to be communicated with each other. The present invention thereby effectively minimizes temperature increases caused by heat generated from a rear-side bearing, extending longevity and improving machining precision.
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公开(公告)号：EP4282562A1
公开(公告)日：2023-11-29
申请号：EP21921346.9
申请日：2021-12-23
申请人： NSK Ltd.
摘要： Provided are a bearing device and a main spindle device for a machine tool capable of achieving both high load capacity and high speed rotation. The bearing device has a plurality of angular contact ball bearings (41, 42, 43, 44) arranged in a back-to-back combination in an axial direction, and receives a load from one side thereof in the axial direction. Ball diameters (Da41, Da42) of the angular contact ball bearings on a load side (41, 42) are larger than ball diameters (Da43, Da44) of the angular contact ball bearings on an anti-load side (43, 44).
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公开(公告)号：EP2799167B1
公开(公告)日：2019-03-13
申请号：EP12863505.9
申请日：2012-12-27
申请人： NSK Ltd.
IPC分类号： B23B19/02 , F16C33/80 , B23Q11/08 , F16J15/447
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公开(公告)号：EP3100805A1
公开(公告)日：2016-12-07
申请号：EP16174040.2
申请日：2012-06-28
申请人： NSK Ltd.
CPC分类号： B23Q1/70 , B23Q11/127
摘要： In a spindle device 10 of a built-in motor type, a rotary shaft 12 includes a first cylindrical member 71 made of a metal material, and a second cylindrical member 72 made of carbon fiber composite material, disposed on an outer peripheral surface of the first cylindrical member 71 and having an outer peripheral surface on which a rotor 20 is fitted. Therefore, it is possible to suppress the increase in temperature of the rotary shaft or a bearing caused by heat generated from the rotor, and to improve machining precision.
摘要翻译： 在内置马达型的主轴装置10中，旋转轴12包括由金属材料制成的第一圆柱形构件71和由碳纤维复合材料制成的第二圆柱形构件72， 第一圆柱形构件71并具有其上装配有转子20的外周表面。 因此，可以抑制由转子产生的热量引起的旋转轴或轴承的温度升高，并且提高加工精度。
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公开(公告)号：EP4286081A1
公开(公告)日：2023-12-06
申请号：EP21923257.6
申请日：2021-12-23
申请人： NSK Ltd.
发明人： OGURI, Shoichiro , IWASAKI, Osamu
IPC分类号： B23B19/02 , F16C19/16 , F16C33/38 , F16C33/58 , F16C33/66 , F16C35/12 , F16N31/00 , B23Q11/12
摘要： There are provided a bearing device and a main spindle device capable of continuously discharging a supplied lubricant, maintaining a good lubrication state, stably performing a continuous operation for a long period of time, prolonging the service life of a bearing, and facilitating maintenance. A bearing device (10) supplies a lubricant G from an outside to an inside of a rolling bearing (20) via a lubricant supply path (52). Inner ring spacers (30A, 30B) have flange portions (31) formed to protrude radially outward. A base portion (31a) of the flange portion (31) is axially separated from an end surface (33) of the inner ring spacers (30A, 30B) in contact with an inner ring (21), and a side surface (32) of the flange portion (31) on the rolling bearing side has a disk-shaped flat surface extending radially outward from the base portion (31a) of the flange portion (31).
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公开(公告)号：EP3100805B1
公开(公告)日：2018-09-26
申请号：EP16174040.2
申请日：2012-06-28
申请人： NSK Ltd.
CPC分类号： B23Q1/70 , B23Q11/127
摘要： In a spindle device 10 of a built-in motor type, a rotary shaft 12 includes a first cylindrical member 71 made of a metal material, and a second cylindrical member 72 made of carbon fiber composite material, disposed on an outer peripheral surface of the first cylindrical member 71 and having an outer peripheral surface on which a rotor 20 is fitted. Therefore, it is possible to suppress the increase in temperature of the rotary shaft or a bearing caused by heat generated from the rotor, and to improve machining precision.
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公开(公告)号：EP2799167A1
公开(公告)日：2014-11-05
申请号：EP12863505.9
申请日：2012-12-27
申请人： NSK Ltd.
CPC分类号： F16J15/4476 , B23Q11/0883 , F16C19/546 , F16C33/80 , F16C2206/06 , F16C2322/39 , F16J15/164
摘要： Provided is a spindle apparatus having a good waterproof function. At least a portion of a rotating member 40, which is fixed to a rotary shaft 11 of the spindle apparatus 10 in an integrally rotatable manner and forming a portion of a waterproof mechanism for preventing a liquid from entering the front bearings 50, 50, is formed of a carbon fiber composite material.
摘要翻译： 提供了具有良好的防水功能的主轴装置。 以一体旋转的方式固定到主轴装置10的旋转轴11并形成防止液体进入前轴承50,50的防水机构的一部分的旋转构件40的至少一部分是 由碳纤维复合材料形成。
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公开(公告)号：EP3112713B1
公开(公告)日：2018-08-29
申请号：EP15754423.0
申请日：2015-02-26
申请人： NSK Ltd.
CPC分类号： H02K9/19 , B23Q11/127 , F16C19/546 , F16C35/077 , F16C35/12 , F16C37/007 , F16C2322/39 , H02K5/1732 , H02K5/20
摘要： A cooling passage through which a cooling medium can flow is formed between the inner peripheral surface of a rear housing, and the outer peripheral surface of a bearing sleeve having a free-side bearing inserted therein. The cooling passage is formed in the outer peripheral surface of the bearing sleeve, and comprises one or a plurality of helical grooves formed in the outer peripheral surface of the sleeve from one-end side of the sleeve in the axial direction to another-end side of the sleeve in the axial direction. The housing is provided with: a supply port which communicates with one end of the helical grooves, and through which the cooling medium is supplied; and a discharge port which communicates with another end of the helical grooves, and through which the cooling medium that has flowed through the cooling passage is discharged.
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