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1. 发明申请

US20230137648A1 SEALED ROLLING BEARING 有权
公开(公告)号：US20230137648A1
公开(公告)日：2023-05-04
申请号：US17912360
申请日：2021-03-19
申请人： NTN CORPORATION
发明人： Hayato KAWAGUCHI , Takahiro WAKUDA
IPC分类号： F16C33/78 , F16C19/06
摘要： A sealed rolling bearing is provided which includes slingers, and seal members disposed between the inner ring and the outer ring, and sealing the rolling element installation area. The radially inner and outer portions of each slinger are bent inwardly such that a labyrinth portion is defined between the radially outer bent portion of the slinger and the radially inner surface of the outer ring, the labyrinth portion having a path length, in the axial direction of the bearing, longer than the material thickness of the slinger.

2. 发明授权

US11634021B2 Power device for vehicles 有权
公开(公告)号：US11634021B2
公开(公告)日：2023-04-25
申请号：US16850604
申请日：2020-04-16
申请人： NTN CORPORATION
发明人： Mitsuo Kawamura , Kentaro Nishikawa , Yuuji Yada , Yasuyuki Fujita , Hiroki Yabuta
IPC分类号： B60K6/26 , B60K7/00 , H02K7/08
摘要： The power device for a vehicle includes: a wheel bearing including a stationary ring and a rotary ring having a hub flange, the rotary ring being rotatably supported by the stationary ring via rolling element, the hub flange being configured to be attached with a wheel of a vehicle and a brake rotor; and a generator including a stator attached to the stationary ring of the wheel bearing and a rotor attached to the rotary ring of the wheel bearing, wherein the rotor includes a soft magnetic material part, magnets, and a resin material part that is integrally molded with the soft magnetic material part and the magnets.

3. 发明申请

US20230090287A1 GREASE COMPOSITION AND GREASE-SEALED BEARING 有权
公开(公告)号：US20230090287A1
公开(公告)日：2023-03-23
申请号：US17794250
申请日：2021-01-15
申请人： NTN CORPORATION
发明人： Takayuki KAWAMURA
IPC分类号： F16C33/66
摘要： To provide a grease composition that is capable of effectively preventing an early-flaking caused by hydrogen embrittlement, and a grease-sealed bearing in which the grease composition is sealed. A grease composition 7 contains a base oil, a thickener, and an additive. The additive contains sodium molybdate, and zinc alkyldithiophosphate having a 1-30 C primary alkyl group. The grease composition contains 0.1-5 mass % of the sodium molybdate relative to the whole of the grease composition. The grease composition contains 0.1-5 mass % of the zinc alkyldithiophosphate relative to the whole of the grease composition.

4. 发明申请

US20230086645A1 BEARING DEVICE, SPACER, AND MANUFACTURING METHOD 有权
公开(公告)号：US20230086645A1
公开(公告)日：2023-03-23
申请号：US17798830
申请日：2021-02-02
申请人： NTN Corporation
发明人： Takashi KOIKE , Yusuke SHIBUYA , Sota YAMAGUCHI
IPC分类号： F16C32/04 , F16C43/04 , H02K7/09
摘要： A bearing device includes: a magnetic ring fixed to an inner ring; and a stator fixed to an outer ring so as to face magnetic ring. Magnetic ring and stator constitute a claw pole type generator. Stator includes a coil and a magnetic yoke surrounding coil. The magnetic yoke is configured by combining a first member and a second member that are magnetic bodies. First member and second member have an identical shape. Each of first member and second member has a plurality of second claws arranged in a comb shape. A plurality of first claws of first member and the plurality of second claws of second member are alternately arranged on a surface facing magnetic ring.

5. 发明申请

US20230086277A1 ROTOR FOR ELECTRIC WATER PUMPS AND SLIDING BEARING DEVICE FOR WATER PUMPS 有权
公开(公告)号：US20230086277A1
公开(公告)日：2023-03-23
申请号：US17798551
申请日：2021-02-10
申请人： NTN CORPORATION
发明人： Ken YASUDA
IPC分类号： F04D13/06 , F04D29/046 , F16C17/02 , F16C33/20
摘要： To provide a rotor for electric water pumps in which a sliding bearing formed of a thermoplastic resin composition can be produced at a low cost and has superior low friction and low wear property, and an inner diameter of the sliding bearing is hardly contracted by the insert-molding. A rotor 1 used for electric water pumps has a main body 2 that supports an impeller of the pump, a sliding bearing 3 that rotatably supports a shaft, and a magnet 4 disposed to face a stator. The sliding bearing 3 is an annealing treated body of a polyphenylene sulfide resin composition. The polyphenylene sulfide resin composition contains 5-30 vol % of carbon fiber, 1-20 vol % of polytetrafluoroethylene resin and 1-30 vol % of graphite relative to the whole volume of the polyphenylene sulfide resin composition. The main body 2 is an injection-molded body disposed by insert-molding a thermoplastic resin composition, which is different from the polyphenylene sulfide resin composition, at an outer diameter side of the sliding bearing 3.

6. 发明申请

US20230043113A1 FIXED-TYPE CONSTANT VELOCITY UNIVERSAL JOINT 有权
公开(公告)号：US20230043113A1
公开(公告)日：2023-02-09
申请号：US17788032
申请日：2020-12-22
申请人： NTN Corporation
发明人： Tomoshige KOBAYASHI , Masazumi KOBAYASHI
IPC分类号： F16D3/2245 , F16D3/84
摘要： A fixed type constant velocity universal joint includes an outer joint member, an inner joint member, eight balls, and a cage. The fixed type constant velocity universal joint has a ball retaining mechanism. A ratio of an axial length from a joint center to an opening-side end surface of the outer joint member to a diameter of each of the balls is within a range of 0.35 to 0.52. A ratio of a width of the cage to the diameter of each of the balls is within a range of 1.63 to 1.80. The ball retaining mechanism includes a cylindrical shaft portion at an end portion of a shaft and an angle restriction stopper surface of the outer joint member.

7. 发明申请

US20230028144A1 SHAFT SEAL 有权
公开(公告)号：US20230028144A1
公开(公告)日：2023-01-26
申请号：US17784646
申请日：2020-12-03
申请人： NTN CORPORATION
发明人： Ken YASUDA , Yoshihiro TAKAHASHI
IPC分类号： F16J15/3232
摘要： To provide a shaft seal that is capable of decreasing rotational torque and realizing superior sealing performance. A shaft seal 1 having a ring shape adheres to an outer peripheral surface of a rotational shaft 6 and thereby seals sealed fluid. The shaft seal 1 partitions a gap between the rotational shaft 6 and a housing 7 to which the shaft seal 1 is mounted, into a high-pressure side and a low-pressure side. The shaft seal 1 is an injection-molded body having a generally U-shape in a sectional view about an axial direction. The shaft seal 1 has a seal lip part 2 that is configured to extend to the high-pressure side and slide on the rotational shaft 6, and an outer lip part 3 that is disposed at an outer diametrical side relative to the seal lip part 2. An inclined angle α of the seal lip part 2 relative to the outer peripheral surface of the rotational shaft 6 is 5-20 degrees. The length L2 of the seal lip part 2 in the sectional view about the axial direction of the shaft seal 1 is 2.0-6.5 mm.

8. 发明授权

US11542982B2 Tapered roller bearing 有权
公开(公告)号：US11542982B2
公开(公告)日：2023-01-03
申请号：US17262862
申请日：2019-08-16
申请人： NTN Corporation
发明人： Takashi Kawai
IPC分类号： F16C19/36 , F16C33/36 , F16C33/58 , F16C33/64
摘要： A tapered roller bearing includes an inner ring having a tapered raceway surface and a large-collar surface on a large-diameter side of the raceway surface, and tapered rollers. Each of the rollers has a large end surface guided by the large-collar surface. When R represents a set curvature radius of the large end surface and RBASE represents a base curvature radius from a vertex of a cone angle of each of the tapered rollers to the large-collar surface, the base curvature radius RBASE is 100 mm or less, and a ratio R/RBASE of the set curvature radius R to the base curvature radius RBASE is set to 0.90 or less. When RACTUAL represents an actual curvature radius of the large end surface of each of the tapered rollers, a ratio RACTUAL/R of the actual curvature radius RACTUAL to the set curvature radius R exceeds 0.5.

9. 发明授权

US11536269B2 Tip seal for scroll compressor 有权
公开(公告)号：US11536269B2
公开(公告)日：2022-12-27
申请号：US16484419
申请日：2018-02-07
申请人： NTN CORPORATION
发明人： Takuya Ishii , Daichi Ito , Katsushi Takeo , Satoru Fukuzawa
IPC分类号： F04C18/02 , F04C27/00 , F01C19/00
摘要： A tip seal 1 for a scroll compressor capable of reducing a frictional force between scroll members and the tip seal where the tip seal 1 has a spiral shape for sealing a compression chamber formed between a fixed scroll and a movable scroll in a scroll compressor provided with the fixed scroll. The movable scroll having a plurality of concave parts 4 being formed by partially notching a sliding surface 5 on the scroll members, the concave parts 4 being arranged on at least one of a spiral inner peripheral surface 1b or a spiral outer peripheral surface 1a. Each of the concave parts 4 being open to the inner peripheral surface 1b or the outer peripheral surface 1a.

10. 发明申请

US20220403874A1 HUB BEARING 有权
公开(公告)号：US20220403874A1
公开(公告)日：2022-12-22
申请号：US17774456
申请日：2020-11-02
申请人： NTN CORPORATION
发明人： Tomoya SAKAGUCHI , Naoto SHIBUYA , Makoto SEKI
IPC分类号： F16C19/18 , F16C33/58
摘要： To provide a hub bearing that is capable of reducing a delay in a response of the hub bearing and improving a steering stability of a vehicle. A hub bearing 1 includes an outer ring 2 serving as a stationary side raceway ring, a hub wheel 3 and an inner ring 5 serving as a rotatable side raceway ring, balls 4 serving as a plurality of rolling elements disposed between a raceway surface of the stationary side raceway ring and a raceway surface of the rotatable side raceway ring, and grease that lubricates a rolling contact part between each of the raceway surfaces and the rolling elements. The surface roughness of at least one raceway surface selected from the raceway surface of the stationary side raceway ring and the raceway surface of the rotatable side raceway ring in the rolling contact part is 0.03 μmRa or less. Further, the grease has a traction coefficient in the rolling contact part of 0.04 or less at 40° C. when a vehicle speed is 20 km/h or more.

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