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公开(公告)号：US20200291999A1
公开(公告)日：2020-09-17
申请号：US16084180
申请日：2017-03-08
申请人： NTN CORPORATION
发明人： Kohei MIZUTA , Chikara OHKI
IPC分类号： F16C33/64 , B21D22/20 , B21D24/16 , B21D28/02 , B21D53/10 , C21D1/18 , C21D1/76 , C21D9/40 , F16C19/36 , F16C19/44 , B21J1/06 , B21J5/08
摘要： The method includes: the step of preparing a steel material and a work portion; the step of placing the steel material on the work portion; and the steps of obtaining the rolling bearing ring by heating the steel material on the work portion to a temperature equal to or higher than an A1 transformation point, thereafter punching a part of the steel material into a ring shape, and thereafter quenching the steel material in a ring shape on the work portion. In the step of obtaining the rolling bearing ring, heating and punching are performed in the state where oxidation of the steel material is suppressed, and in the state where tensile force is applied between the first portion and the second portion in the steel material.
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公开(公告)号：US20180347623A1
公开(公告)日：2018-12-06
申请号：US15771763
申请日：2016-10-12
申请人： NTN CORPORATION
发明人： Michio HORI , Hideto TORISAWA , Hiroshi YUKI , Chikara OHKI , Kazuhiro YAGITA
IPC分类号： F16C19/38 , C21D9/40 , C21D1/42 , C21D6/00 , C22C38/22 , C22C38/04 , C22C38/02 , C21D1/10 , C21D1/28 , F16C33/62 , F16C33/64
摘要： There is prepared a formed body constituted of steel and having an outer circumferential surface having an annular groove having a bottom surface to serve as a raceway surface of the bearing ring. In the step of forming a heated region, the formed body is induction heated to form a heated region including the bottom surface of the groove and heated to a temperature of at least an A1 point. In the cooling step, the whole of the heated region is simultaneously cooled to a temperature of not more than an Ms point. The step of retaining the formed body in a state in which heating is stopped is performed after the step of forming a heated region before the step of cooling. In the step of retaining, dispersion in temperature in the heated region in the circumferential direction is suppressed to not more than 20° C.
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公开(公告)号：US20160153495A1
公开(公告)日：2016-06-02
申请号：US14896886
申请日：2014-06-05
申请人： NTN CORPORATION
发明人： Takashi UENO
CPC分类号： F16C33/62 , C21D9/36 , C21D9/40 , C22C38/00 , C22C38/001 , C22C38/002 , C22C38/02 , C22C38/04 , C22C38/12 , C22C38/18 , C22C38/34 , C22C38/40 , C22C38/44 , C23C8/32 , F16C19/364 , F16C19/542 , F16C19/547 , F16C33/56 , F16C2204/64 , F16C2204/66 , F16C2204/74
摘要： A tapered roller bearing includes an outer ring, an inner ring, a plurality of tapered rollers, and a holder. A nitrogen concentration in a surface layer portion under a contact surface is 0.3 mass % or more. The holder includes a small annular portion, a large annular portion, and a plurality of column portions. A pocket has a trapezoidal shape in which a portion housing a small diameter side of the tapered roller is located on a reduced width side while a portion housing a large diameter side of the tapered roller is located on an increased width side. Each of the column portions on the reduced width side of the pocket is provided with a cutout.
摘要翻译： 圆锥滚子轴承包括外圈，内圈，多个圆锥滚子和支架。 接触面下表面层部的氮浓度为0.3质量％以上。 保持器包括小的环形部分，大的环形部分和多个柱部分。 口袋具有梯形形状，其中容纳圆锥滚子的小直径侧的部分位于缩小的宽度侧，而容纳圆锥滚子的大直径侧的部分位于增宽的宽度侧。 在口袋的减小宽度侧的每个柱部分设置有切口。
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公开(公告)号：US12129896B2
公开(公告)日：2024-10-29
申请号：US17621346
申请日：2020-06-18
申请人： NTN CORPORATION
发明人： Takuya Katou , Kenji Terada , Yasunori Kawasaki
IPC分类号： F16D3/2245 , B60K17/22
CPC分类号： F16D3/2245 , B60K17/22
摘要： A power transmission mechanism (2) includes left and right drive shafts (3L, 3R) that transmit rotational torque from a drive source to drive wheels provided on left and right sides of a vehicle. In the right drive shaft (3R) and the left drive shaft (3L), the numbers of rolling elements (23, 33) included in plunging type constant velocity universal joints (6L, 6R) are different from each other.
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公开(公告)号：US20240352977A1
公开(公告)日：2024-10-24
申请号：US18685716
申请日：2022-08-10
申请人： NTN CORPORATION
发明人： Taku ITAGAKI
IPC分类号： F16D3/205
CPC分类号： F16D3/2055
摘要： In a tripod type constant velocity universal joint 1 of a double roller type, a carbon content in a core portion of a tripod member 3 is set to 0.23 to 0.44%, and a hardened layer 16 of a carburized layer is provided on the surface of a leg shaft 32. A first region P having a radius of curvature Ra in a cross section in a direction orthogonal to a joint axial direction including an axial line of the leg shaft 32 and a second region Q having a radius of curvature Rb in a cross section in the joint axial direction including the axial line of the leg shaft 32 are provided in an intermediate portion 33 provided between a body portion 31 of the tripod member 3 and the leg shaft 32. Ra>Rb is set.
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公开(公告)号：US20240343065A1
公开(公告)日：2024-10-17
申请号：US18681708
申请日：2022-08-02
申请人： NTN CORPORATION
发明人： Ryou SAKURAI
IPC分类号： B60B27/00
CPC分类号： B60B27/0068
摘要： Provided are: a sensor holder that can prevent influence on the performance of encoder reading by a sensor; and the like. A sensor holder 12 is provided with: a cap part 121 that is fitted into an outer ring 2 so as to cover an inner-side opening 2a of the outer ring 2; a sensor support part 122 that, at a portion of the cap part 121 opposing a magnetic encoder 11, protrudes from the cap part 121 toward one side in the axial direction, and supports a rotation speed sensor 13 for detecting displacement of the magnetic encoder 11; and a nut holding part 123 that protrudes from the cap part 121 toward the one side in the axial direction and holds a nut 124 for securing the rotation speed sensor 13 onto the cap part 121. The sensor support part 122 and the nut holding part 123 are formed separately, and one axial end surface 124a of the nut 124 held by the nut holding part 123 protrudes further toward the one side in the axial direction than one axial end surface 122c of the sensor support part 122.
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公开(公告)号：US20240337287A1
公开(公告)日：2024-10-10
申请号：US18748587
申请日：2024-06-20
申请人： NTN CORPORATION
发明人： Shouta TOHO , Naoki NAKATOCHI
CPC分类号： F16C19/364 , F16C33/4629 , F16C33/467
摘要： Provided is a tapered roller bearing of an inner ring guidance design. A smaller diameter annular part of a cage and a smaller rib of an inner ring of the bearing defines a smaller diameter-side clearance S1. A larger diameter annular part of the cage and a larger rib of the inner ring defines a larger diameter-side clearance S2. The bearing defines a dimensionless number Y which is in the range of at least 0.39 to no more than 0.88 according to the following equation: Y=(Smax/S3)×(d/l)
where d and l are a mean roller diameter and a roller length of the tapered rollers, respectively, S3 corresponds to the equation: S3=(W/2)/tan θ−(PCD/2+(d/2)/sin θ−((D/2)2−(W/2)2)1/2), Smax is chosen from the maximum values of S1 and S2, W is a pocket width of the cage, θ is a pillar angle which is a half of the angle formed, in a section corresponding to the mean roller diameter d, by surfaces of adjacent pillars of the cage that make contact with a tapered roller located in between, PCD is the diameter of roller centers representing the pitch circle diameter of the arrangement of the tapered rollers, and D is a cage inner diameter.-
公开(公告)号：US12085128B2
公开(公告)日：2024-09-10
申请号：US17767891
申请日：2020-10-08
申请人： NTN CORPORATION
发明人： Takayuki Kawamura , Ryouta Kondou , Makoto Seki , Susumu Yamaji
IPC分类号： F16C19/18 , C10M107/02 , C10M115/08 , C10M169/00 , C10M169/02 , C10M169/04 , F16C33/66 , C10N20/02
CPC分类号： F16C33/6633 , C10M107/02 , C10M115/08 , C10M169/02 , C10M169/04 , F16C19/183 , F16C33/6603 , C10N2020/02 , F16C2326/02
摘要： To provide an axle bearing having a low torque property and superior bearing lifetime. A hub bearing 6 is configured to rotatably support a wheel of a vehicle, and has a grease composition 10 sealed in an inner space thereof. The grease composition 10 contains a base oil and a thickener. The shear stress of the grease composition at the shear rate of 1,000-10,000 s−1 at 25° C. is 3,000 Pa or less. The viscosity of the grease composition is 1 Pas or less. The yield stress of the grease composition at 25° C. measured by a dynamic viscoelasticity analysis method using a rheometer is 1,300-3,000 Pa.
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公开(公告)号：US12078220B2
公开(公告)日：2024-09-03
申请号：US18043870
申请日：2022-01-26
发明人： Kunihiro Mikasa , Yasumasa Hibi , Kyohei Sasanuma , Shaoluan Bian
摘要： Provided is a clutch unit in which an output-side outer ring member is attached to a base plate without welding. A clutch unit (100) includes an output-side clutch (60) and a housing (11) that accommodates the output-side clutch (60). The output-side clutch (60) includes an output-side outer ring member (62). The output-side outer ring member (62) and the housing (11) have an engagement protrusion (62s) and an engagement groove (11s) that engage with each other to restrict relative rotation therebetween.
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公开(公告)号：US12055184B2
公开(公告)日：2024-08-06
申请号：US17919663
申请日：2021-04-20
申请人： NTN Corporation
发明人： Tomoki Matsushita
CPC分类号： F16C33/583 , F16C19/386 , F16C33/366 , F16C33/585 , F16C2240/46 , F16C2240/70 , F16C2326/02
摘要： The present invention provides a bearing device for vehicle wheel reducing the occurrence of abnormal heat generation caused by metal contact and enhancing anti-seizing properties. Each of the tapered rollers 4 has a large diameter-side end surface 41, the inner raceway surface 31, and the large flange part 32. The large flange part 32 includes a chamfered part 32c and a rounded part 32d. The large flange part 32 has a large flange part-side cutout part 34, the large diameter-side end surface 41 of each of the tapered rollers 32 has a tapered roller-side cutout part 43 having a circular shape formed coaxially with the large diameter-side end surface 41, and a clearance of the large diameter-side end surface 41 as viewed from a contact point between the large diameter-side end surface 41 and the guide surface 32a is greater than or equal to 15 μm.
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