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公开(公告)号：EP3858557A1
公开(公告)日：2021-08-04
申请号：EP19867647.0
申请日：2019-09-24
Applicant: NTN Corporation
Inventor： NOSE, Kenzou , ISOBE, Hiroshi
Abstract: A link actuation apparatus includes: a parallel link mechanism (10) including a proximal-side link hub (12), a distal-side link hub (13), and three or more link mechanisms (14) each coupling the distal-side link hub (13) to the proximal-side link hub (12) such that a posture of the distal-side link hub (13) can be changed relative to the proximal-side link hub (12); posture control drive sources (11); and a control device (2). The control device (2) includes an abnormality detector (4) including: a measurement section (5) configured to measure a predetermined state value which is affected by abnormality in revolute pair parts of a link actuation apparatus body (1) constituted by the parallel link mechanism (10) and the posture control drive sources (11); and a determination section (6) configured to determine if any of the revolute pair parts has abnormality in on the basis of a measurement result obtained by the measurement section (5). For example, the measurement section (5) measures rigidity, or driving torque or the like.
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公开(公告)号：EP3855036A1
公开(公告)日：2021-07-28
申请号：EP19863354.7
申请日：2019-09-17
Applicant: NTN Corporation
Inventor： KAWAGUCHI Hayato
IPC: F16C35/067 , F16C19/06 , F16C33/58
Abstract: In a bearing assembly including a rolling bearing (3) of which a bearing ring (5) is fitted to the mating member, i.e., a shaft (1) or a housing (2), with a clearance fit, creep of the bearing ring (5) is reduced effectively. Of the bearing ring (5) and the mating member (2), the bearing ring (5) has a flank face (5c) that separates a fitting surface (5b) of the bearing ring across the entire width thereof. The flank face (5c) defines a radial gap (g) between the bearing ring (5) and the housing (2). In a load receiving region where the radial gap (g) remains, a portion of the bearing ring which is deformed in a wave-shaped pattern is kept out of contact with the fitting surface (2a) of the housing (2). The wave-shaped deformation of the bearing ring (5) does not act as traveling waves that cause creep of the bearing ring (5).
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公开(公告)号：EP3839289A1
公开(公告)日：2021-06-23
申请号：EP19850595.0
申请日：2019-08-09
Applicant: NTN Corporation
Inventor： YUKISHIMA, Ryou , YAMAMOTO, Tetsuya , SATO, Katsunori
Abstract: A vehicle drive device uses a parallel shaft gear reducer (30) in which a gear is composed of helical gear, as a speed reducer part (B) that decelerates and outputs a rotation of an electric motor part (A). In the vehicle drive device, of meshing parts of the gears formed in the speed reducer part (B), two gears form a meshing part in which the amount of misalignment that occurs between the tooth surfaces of the two gears meshing with each other is different during driving and during coasting of a vehicle. A first tooth surface (S1) meshing with a mating tooth surface during driving is subjected to tooth surface modification, and a second tooth surface (S2) meshing with a mating tooth surface during coasting is subjected to tooth surface modification of an amount different from an amount of the tooth surface modification to the first tooth surface (S1).
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公开(公告)号：EP3839279A1
公开(公告)日：2021-06-23
申请号：EP19850686.7
申请日：2019-08-01
Applicant: NTN Corporation
Inventor： TSUCHIYA, Masaru
Abstract: A roller and cage assembly includes: a cage (12) including a pair of rings (11) and a plurality of cage bars (21) extending in an axial direction and connecting the rings (11) to each other; and rollers disposed in pockets between the cage bars (21, 21) adjacent to each other in a circumferential direction. The cage bar (21) includes an end portion (22) and a middle portion located radially inward from the end portion (22). The end portion (22) has an outer retaining protrusion (25) formed therein, the outer retaining protrusion protruding into the pocket and configured to contact the roller to restrict radially outer movement of the roller. The end portion (22) of the cage bar (21) has an oil groove (31) in an inner peripheral surface (26) thereof, the oil groove extending in the circumferential direction and connecting to the outer retaining protrusion (25).
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公开(公告)号：EP3816477A1
公开(公告)日：2021-05-05
申请号：EP19814691.2
申请日：2019-06-05
Applicant: NTN Corporation
Inventor： NOSE, Kenzou , ISOBE, Hiroshi
Abstract: In a link actuating device (1), a distal end side link hub (13) is coupled to a proximal end side link hub (12) via three or more link mechanisms (14). A posture control drive source (11) configured to arbitrarily change the posture of the distal end side link hub (13) is provided to each of two or more link mechanisms (14). The link actuating device (1) includes a storage unit (8) configured to store therein an operating position of the posture control drive source (11) when the distal end side link hub (13) is in a defined posture. In each of the two or more link mechanisms (14), a positioning portion (4) is provided to at least one of the proximal side end link member (15), the distal side end link member (16), and the intermediate link member (17). A positioning member (3) configured to position the distal end side link hub (13) in the defined posture is dismountably mounted between a plurality of the positioning portions (4).
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Patent Agency Ranking
公开(公告)号：EP3779220A1
公开(公告)日：2021-02-17
申请号：EP19775338.7
申请日：2019-03-27
Applicant: NTN Corporation
Inventor： WAKISAKA Takashi
Abstract: An object is to prevent tapered rollers from being placed into pockets inversely with their large-diameter side and the small-diameter side flipped upside down when the tapered rollers are assembled into the pockets from a diametrically inner surface side of a retainer. A retainer (20) of a tapered roller bearing (11) includes a large-diameter ring portion (20a) on its large-diameter side, a small-diameter ring portion (20b) on its small-diameter side, and a plurality of pillar portions (20c) disposed equidistantly in a circumferential direction, connecting the large-diameter ring portion (20a) and the small-diameter ring portion (20b). Each pillar portion (20c) has, on its diametrically inner surface side of its small-diameter end portion, a fall-out prevention tab (20e) that prevents the tapered roller (14) assembled into the pocket (P) from falling onto the diametrically inner surface side.
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公开(公告)号：EP3778268A1
公开(公告)日：2021-02-17
申请号：EP19781726.5
申请日：2019-03-26
Applicant: NTN Corporation
Inventor： SUGIURA, Saori , TAMURA, Shiro
Abstract: A power line wiring structure of the present invention provided on a vehicle including an in-wheel motor drive device (10), a vehicle body side member, a suspension device (41) that couples the in-wheel motor drive device (10) to the vehicle body side member, a power supply unit mounted on the vehicle body side member, and a power line (51) having one end connected with the power supply unit and the other end connected with the in-wheel motor drive device includes: a clamp means (52) for gripping a halfway part of the power line (51); and an elastic member (53) supporting the clamp means (52), the elastic member (53) being attached and fixed to a suspension member (41d) which is one part of the suspension device and is fixed to the in-wheel motor driving device. The elastic member (53) and the clamp means (52) constitute a dynamic damper attached to the in-wheel motor drive device (10), with the power line (51) as a mass body.
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公开(公告)号：EP3770470A1
公开(公告)日：2021-01-27
申请号：EP19770739.1
申请日：2019-03-19
Applicant: NTN Corporation
Inventor： KAKEHI Kohzoh , YAMAZOE Yuuki
IPC: F16J15/3272 , F16K1/226
Abstract: To provide a seal ring capable of suppressing wear of a mating housing and preventing protrusion from an annular groove and thereby being superior in low leak performance, which is an original object of the seal ring. A seal ring 1 formed of resin is attached to an annular groove 12 formed on an outer periphery of a butterfly valve 11 having a substantially disc shape so as to seal an annular gap 14 between the butterfly valve 11 and a housing 13 in which the valve is housed. A part of the seal ring 1 is protruded from the annular groove 12, so that the seal ring 1 adheres to the housing 13 to seal the annular gap 14 due to pressure from sealed fluid. A radial direction thickness t of the ring is set in a range of 7-11% of a ring outer diameter in a free state. A ring inner diameter in a state in which the diameter is enlarged due to pressure from the sealed fluid when the valve is opened, is smaller than an outer diameter r of the valve.
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公开(公告)号：EP3073140B1
公开(公告)日：2020-12-02
申请号：EP14864502.1
申请日：2014-10-22
Applicant: NTN Corporation
Inventor： KOBAYASHI Tomoshige , MASUOKA Kouji
IPC: F16D3/223 , F16D3/2237
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公开(公告)号：EP3450783B1
公开(公告)日：2020-11-18
申请号：EP17789234.6
申请日：2017-04-07
Applicant: NTN Corporation
Inventor： TOMOGAMI, Shin
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