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公开(公告)号：EP4502411A1
公开(公告)日：2025-02-05
申请号：EP23779152.0
申请日：2023-02-28
Applicant: NTN Corporation
Inventor： KOBAYASHI, Tomoshige
IPC: F16D3/2245 , F16D3/20
Abstract: In a fixed type constant velocity universal joint 1 having eight balls rotationally driven by an electric motor, grease G having an initial consistency of consistency number 1 to 2 and mixing stability of 390 to 440 is used. An initial pocket gap δ represented by a difference (H-D BALL ) between an axial width H of a pocket 5a and a diameter D BALL of a torque transmitting ball 4 is set to -21 µm or more and -6 µm or less.
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公开(公告)号：EP4502408A1
公开(公告)日：2025-02-05
申请号：EP23779487.0
申请日：2023-03-13
Applicant: NTN Corporation
Inventor： WAKUDA, Takahiro , MUNEYOSHI, Masaki , HATA, Koyomi , SAKAI, Kohei
Abstract: A crown-shaped cage resin entirely formed of a resin material is provided. The steel ball diameter D of each steel ball (4) received in a respective one of pockets (9) is 13 to 18 mm. The wall thickness t of the cage from the bottom of each pocket (9) to the end surface of an annular portion (5) on the other axial side is 10 to 20% of the steel ball diameter D. The axial length HB of each claw (8a, 8b) of each horn portion (6) is 60 to 80% of the steel ball diameter D. When the tensile strength of the resin material is denoted by σ, the cross-sectional area A of a portion of the cage between each circumferentially adjacent pair of pockets (9) is set within the range of the following formula: A > (511D-4027)/σ
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公开(公告)号：EP4477912A1
公开(公告)日：2024-12-18
申请号：EP23752668.6
申请日：2023-01-24
Applicant: NTN Corporation
Inventor： SASANUMA Kyohei , NAKAMURA Takatoshi , MIYAKO Yuki
IPC: F16D63/00 , F16D67/02 , F16D65/16 , F16D127/06 , F16D127/10 , F16D41/067 , F16D41/10
Abstract: To provide a clutch unit with an improved flexibility of mounting of a member that prevents rotation of a drive shaft to which a torque is transmitted from an output side. The clutch unit includes a disengaging part 55 and an elastic member 54. The disengaging part 55 is supported on an operating plate 42, which is an operating tool, in such a manner that the disengaging part 55 can rotate integrally with the operating plate 42 about the axis and moves, through rotation of the operating lever 40, at least one of the whole of a base part 51 and an engaging part 52 and the whole of a drive shaft-side engaging member 53 to an engaged position P1 in which the drive shaft-side engaging member 53 and the engaging part 52 are in contact with each other in such a state that the drive shaft-side engaging member 53 cannot rotate with respect to the base part 51 and the engaging part 52 about the axis and a disengaged position P2 in which the drive shaft-side engaging member 53 and the engaging part 52 are separate from each other in such a state that the drive shaft-side engaging member 53 can rotate with respect to the engaging part 52 about the axis, and the elastic member 54 is located between the drive shaft-side engaging member 53 and the base part 51. The elastic member 54 applies an elastic force to the drive shaft-side engaging member 53 and the base part 51 in a direction to make the drive shaft-side engaging member 53 and the base part 51 move from the disengaged position P2 to the engaged position P1.
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公开(公告)号：EP4411175A1
公开(公告)日：2024-08-07
申请号：EP22875744.9
申请日：2022-09-07
Applicant: NTN Corporation
Inventor： OKU Yuta , KATO Akio , SAKAI Kayo
Abstract: A feed screw mechanism (30) includes: a rotary member (31) having a female screw portion (31a) on an inner peripheral surface; a linear motion member (32) having, on an outer peripheral surface, a male screw portion (32a) that is directly or indirectly screwed to the female screw portion (31a) and making a linear motion with rotation of the rotary member (31); a lubricant housed between the female screw portion (31a) and the male screw portion (32a); a housing (5) that houses the rotary member (31) and the linear motion member (32); and a wall portion (36) protruding, in a radial direction, from the outer peripheral surface of the linear motion member (32). The wall portion (36) makes a linear motion together with the linear motion member (32), and an outer radial end portion of the wall portion (36) is disposed: so as not to contact the inner peripheral surface of the housing (5) and a member provided on the inner peripheral surface of the housing (5); or so as to be slidable with respect to the inner peripheral surface of the housing (5) or the member provided on the inner peripheral surface of the housing (5).
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公开(公告)号：EP4407015A1
公开(公告)日：2024-07-31
申请号：EP22872873.9
申请日：2022-09-20
Applicant: NTN Corporation
Inventor： KAWAMURA, Takayuki
IPC: C10M141/08 , C10N10/04 , C10N30/06 , C10N40/00 , C10N40/02 , C10N50/10 , F16C19/06 , C10N10/02 , C10N10/12
CPC classification number: F16C19/06 , C10N2050/1020130101 , C10M2201/06220130101 , C10N2010/0220130101 , C10N2010/1220130101 , C10M2207/28320130101 , C10M2219/04420130101 , C10N2010/0420130101 , C10M2215/102620130101 , C10M2205/02820130101 , C10N2040/0220130101 , C10M2207/040620130101 , C10M2207/280520130101 , C10M2219/04620130101 , C10M2219/06820130101 , C10N2030/0620130101 , C10M141/08
Abstract: To provide a grease composition that is capable of effectively suppressing an early-flaking due to hydrogen embrittlement, and to provide 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 as an essential component, and sorbitan-based ester or metal sulfonate. The metal sulfonate is Ca sulfonate or Zn sulfonate. The content of the metal sulfonate is less than 3 parts by mass relative to 100 parts by mass of a total of the base oil and the thickener.
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Patent Agency Ranking
公开(公告)号：EP4406815A1
公开(公告)日：2024-07-31
申请号：EP22872801.0
申请日：2022-09-14
Applicant: NTN Corporation
Inventor： SATO Koji
IPC: B62D5/04
Abstract: A steer-by-wire type steering system is provided in which a steering actuator changes the direction of steered parts based on the operation amount of a steering wheel detected by a steering sensor; in which when the direction of the steered parts reaches the stroke end, the driver can reliably perceive this situation via the steering wheel; and in which even while no electric power is being supplied, the steering wheel can be locked. The steer-by-wire type steering system includes a shaft (4) coupled to the steering wheel so as to rotate in unison with the steering wheel; an outer ring (21) having an inner periphery disposed around the shaft (4); engagement elements (24) disposed between the shaft (4) and the inner periphery of the outer ring (21); a cage (25) retaining the engagement elements (24), and disposed to be circumferentially movable between an engagement position where the engagement elements (24) are engaged with the shaft (4) and the inner periphery of the outer ring (21), and a disengagement position where the engagement elements (24) are disengaged from the shaft (4) and the inner periphery of the outer ring (21); a centering spring (26) that elastically retains the cage (25) at the disengagement position, and that is rotationally fixed to the shaft (4) and the cage (25) so as to rotate in unison with the shaft (4); and a non-excited operation type electromagnetic brake (27) that brakes the cage (25).
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公开(公告)号：EP4397877A1
公开(公告)日：2024-07-10
申请号：EP22864219.5
申请日：2022-08-10
Applicant: NTN Corporation
Inventor： ITAGAKI Taku
Abstract: In a tripod type constant velocity universal joint of a double roller type, a projection 40 is provided in regions including both end portions in a direction orthogonal to a joint axial line O on a shaft end side with respect to an inner ring 12 on an outer peripheral surface of a leg shaft 32 of a tripod member 3. A ratio T/ag1 between a dimension T in a direction of the joint axial line O of the projection 40 and a major diameter ag1 of a contact portion with the inner ring on the outer peripheral surface of the leg shaft 32 is 0.3 or more.
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公开(公告)号：EP4397876A1
公开(公告)日：2024-07-10
申请号：EP22864216.1
申请日：2022-08-10
Applicant: NTN Corporation
Inventor： ITAGAKI Taku
Abstract: 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：EP4365442A1
公开(公告)日：2024-05-08
申请号：EP22832969.4
申请日：2022-06-22
Applicant: NTN Corporation
Inventor： KARASAWA, Ryosuke , MATSUURA, Fumihiko
IPC: F03D9/32
CPC classification number: F03D9/32
Abstract: Provided is a mobile structure that can be used even in non-electrified areas or the like and can suppress noise in a desired space inside the structure. The mobile structure includes: a structure (4) having a box-like shape, the structure being movable and having a space (S1) inside for at least one of living, office duties, work, rest, business, and medical services; a wind turbine generator (30) supported on the structure (4); and a power supply mechanism (2) configured to supply power generated by the wind turbine generator (30) to electrical equipment (53) provided to the structure (4). The structure (4) has a storage (M) inside, the storage housing the power supply mechanism (2). The storage (M) faces an inner surface of the peripheral wall (13) of the structure (4) on which the wind turbine generator (30) is supported. In addition, the structure (4) includes a partition wall (51) inside, the partition wall partitioning the storage (M) from the space (S1).
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公开(公告)号：EP4357736A1
公开(公告)日：2024-04-24
申请号：EP22824880.3
申请日：2022-06-08
Applicant: NTN Corporation
Inventor： KOIKE, Takashi , FUKUSHIMA, Yasuyuki
Abstract: An angle detecting device (4) includes: an encoder unit (6) having a magnetic track on which N poles and S poles are alternately arrayed; and a magnetic sensor (7) facing the magnetic track with a gap interposed therebetween. The magnetic track has, when being expressed with a reference magnetic pole width (P) and a reference magnetic pole pair number (n), a main track (2) having a magnetic pole width of (P) and a sub track (3) having a magnetic pole width of (Pn/(n-1)), the main track (2) and the sub track (3) being provided adjacent and parallel to each other along a longitudinal direction of a sheet-shaped encoder magnetic material (1). The encoder unit (6) is formed of the sheet-shaped encoder magnetic material (1) which has a length not larger than a reference length (L=2Pn) and which is wound around and fixed to an outer circumference portion or an inner circumference portion of a rotary body (5). The angle detecting device (4) further includes a correction calculator (10) configured to multiply an absolute angle calculated by a calculator (9) of the magnetic sensor (7) by a correction coefficient based on a diameter of the encoder unit (6), to correct the absolute angle of the rotary body.
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