Patents Assigned to NSK
-
Patent number: 12117051Abstract: A reverse-input blocking clutch, comprising a pressed member, an input member, an output member, and an engaging element, the pressed member including a first pressed member element having a pressed surface around an inner peripheral surface thereof and a second pressed member element having a mounting portion fixed to a portion that does not rotate during use, the engaging element configured to transmit rotational torque input to the input member to the output member by moving in a direction away from the pressed surface and to completely block rotational torque reversely input to the output member or transmit a part of the rotational torque reversely input to the output member to the input member and block a remaining part thereof.Type: GrantFiled: January 28, 2022Date of Patent: October 15, 2024Assignee: NSK LTD.Inventors: Nagao Dohi, Yuya Daikoku
-
Patent number: 12115871Abstract: A wireless power receiving system includes: a power receiving device having a power receiving coil configured to receive electric power supplied wirelessly from a power transmission coil of a power transmission device installed on a road surface, at least part of the power receiving coil being contained in a vehicle wheel; and in-vehicle devices installed in a mobile object, the in-vehicle devices being energizably connected to the power receiving device. The power receiving device transmits the received electric power to the in-vehicle devices.Type: GrantFiled: July 22, 2020Date of Patent: October 15, 2024Assignees: THE UNIVERSITY OF TOKYO, BRIDGESTONE CORPORATION, NSK Ltd.Inventors: Hiroshi Fujimoto, Takehiro Imura, Osamu Shimizu, Katsuhiro Hata, Keizo Akutagawa, Yasumichi Wakao, Isao Kuwayama, Daisuke Gunji
-
Patent number: 12117042Abstract: A roller includes chamfered portions and roller inclined surfaces formed on both axial ends of a roller outer circumferential surface. When in a cross section taken along a plane including a rotation axis of the roller and a bearing central axis, an intersection angle between a tangent line of the roller inclined surface at the first position of the roller inclined surface corresponding to an end portion of a guide surface and a perpendicular line of the rotation axis is defined as ?, an intersection angle between a tangent line of the roller inclined surface at the second position corresponding to a boundary between the chamfered portion and the roller inclined surface and a perpendicular line of the rotation axis is defined as ?, and an intersection angle between the guide surface and a perpendicular line of the bearing central axis is defined as ?, ?<?<? is satisfied.Type: GrantFiled: March 4, 2022Date of Patent: October 15, 2024Assignee: NSK LTD.Inventors: Takashi Murai, Yoshinari Kagota
-
Publication number: 20240335914Abstract: Provided is a mechanical structural member that can suppress deformation and has high precision and excellent quality. In a mechanical structural member (triangular threaded shaft 31) in which grooves (32) and teeth (33) are formed by plastic working and a hardened layer (31a) is formed on a surface of the teeth (33), the mechanical structural member has a sorbite structure, and Rockwell hardness in a region P excluding the hardened layer (31a) is 13 to 28 (HRC). A variation in the Rockwell hardness in the region P excluding the hardened layer (31a) is within 6 (HRC).Type: ApplicationFiled: April 26, 2023Publication date: October 10, 2024Applicant: NSK STEERING & CONTROL, INC.Inventor: Takeshi SAITO
-
Patent number: 12110925Abstract: A generatrix shape to which crowning is applied includes a first generatrix shape which is formed in a central portion in an axial direction of at least one of an outer ring raceway surface, an inner ring raceway surface, and a rolling surface of a roller and is composed of a straight line, a pair of second generatrix shapes which are formed from both ends in the axial direction toward the outside in the axial direction of the first generatrix shape and are composed of a single arc curve, and a pair of third generatrix shapes which are formed from both ends in the axial direction toward the outside in the axial direction of the second generatrix shape and are composed of a composite curve of a single arc curve and a logarithmic curve.Type: GrantFiled: January 29, 2021Date of Patent: October 8, 2024Assignee: NSK LTD.Inventors: Tomonori Suwa, Kentaro Oguma, Yoshinori Maeda
-
Patent number: 12110927Abstract: A torque transmission shaft includes a shaft and a clamp. The shaft includes: a male serration in one axial end portion; a slit in the other axial end portion, the slit axially extending and having a closed end on one side and an open end on the other side; a fitting cylinder portion in the other axial end portion; and a female serration provided in of the other axial end portion. The clamp includes: a discontinuous portion arranged at one place in the circumferential direction; a pair of flange portions arranged on both sides of the discontinuous portion; a connecting portion connecting the flange portions; and an insertion hole for fitting cylinder portion. The clamp is fitted onto the fitting cylinder portion to reduce the diameter of the fitting cylinder portion by narrowing the width dimension of the discontinuous portion.Type: GrantFiled: January 22, 2020Date of Patent: October 8, 2024Assignee: NSK Ltd.Inventors: Seiichi Moriyama, Keisuke Nakao
-
Publication number: 20240327943Abstract: Provided is a mechanical structural member that can reduce deformation and has high precision and excellent quality. The mechanical structural member has a groove (32) and a tooth (33) formed by plastic working, and includes a hardened layer (31a) with a uniform martensitic single phase structure formed on a surface by induction hardening, a core region (31b) having a sorbite structure, and a boundary layer (31c) in which a sorbite structure and a martensite structure are mixed, formed between the core region (31b) and the hardened layer (31a). Rockwell hardness in the core region is 13 to 28 (HRC), and a variation in the Rockwell hardness is within 6 (HRC).Type: ApplicationFiled: April 26, 2023Publication date: October 3, 2024Applicant: NSK STEERING & CONTROL, INC.Inventor: Takeshi SAITO
-
Patent number: 12103607Abstract: In a detection method for detecting an end position of a mechanism portion of a turning device, detection of a limit position of a steering angle in a direction of a torque value is started when the torque value of the mechanism portion loaded by at least one of a drive force from an actuator and steering torque to the mechanism portion exceeds a first threshold. The limit position continues to be detected by storing a peak value of the steering angle in the mechanism portion as the limit position while the torque value of the mechanism portion is between the first threshold and a second threshold. The stored limit position is regarded as the end position indicated by the torque value when the torque value of the mechanism portion exceeds the second threshold.Type: GrantFiled: October 29, 2021Date of Patent: October 1, 2024Assignee: NSK LTD.Inventors: Shoya Maruyama, Tetsuya Kitazume
-
Patent number: 12103332Abstract: A notch communicating a pair of pockets adjacent to each other in the circumferential direction of pockets of a retainer is provided in a range from an end section on the axially one side to the axially intermediate section of each of pillar portions of the retainer for an angular contact ball bearing, the notch having a substantially rectangular opening shape as seen from the circumferential direction, and an inner surface of the notch having an outer diameter side flat surface portion arranged on the radially outer side from the center of a pocket and extending substantially linearly in the axial direction, an inner diameter side flat surface portion arranged on the radially inner side from the center and extending substantially linearly in the axial direction, and a back side flat surface portion arranged on the axially other side from the center and extending linearly in the radial direction.Type: GrantFiled: November 6, 2020Date of Patent: October 1, 2024Assignee: NSK LTD.Inventors: Yasuhiro Ishimori, Tatsuo Wakabayashi
-
Patent number: 12103065Abstract: A method of manufacturing a hub unit bearing (1) includes the step of applying an axial load to a shaft end of a hub body (21) so that a staking portion (26) for inner races (22a, 22b) is formed in the hub body (21). The load is adjusted based on at least one of first information acquired before applying the load and second information acquired while applying the load.Type: GrantFiled: February 20, 2020Date of Patent: October 1, 2024Assignee: NSK LTD.Inventor: Nobuyuki Hagiwara
-
Publication number: 20240319029Abstract: A magnetostrictive torque sensor is configured to be attached around a rotating shaft exhibiting a magnetostrictive effect and detects torque transmitted by the rotating shaft. The magnetostrictive torque sensor includes a holder being composed of a resin and including a cylinder portion with a hollow cavity in a center through which the rotating shaft is inserted, a flexible substrate that includes a detection portion on which a coil group composed of a combination of a plurality of detection coils aligned in a predetermined direction is formed by a wiring pattern, and a signal line portion on which a plurality of signal lines electrically connecting the coil group to an external device are formed by a wiring pattern, and a cylindrical magnetic ring being composed of a soft magnetic material and being arranged around an outer circumference of the cylinder portion of the holder.Type: ApplicationFiled: March 18, 2024Publication date: September 26, 2024Applicants: Proterial, Ltd., NSK Ltd.Inventors: Akitoshi FUJIMORI, Takashi ONIMOTO, Seigou URAKAMI, Takumi SHINOJIMA, Kota FUKUDA
-
Patent number: 12097912Abstract: A control apparatus of a steering system for vehicles that controls a turning mechanism by using steering information communicated electrically, includes a turning angle control section that calculates a motor current command value to make a turning angle detected in the turning mechanism follow a target turning angle, and has a friction compensating section that calculates a compensation motor current command value for compensating a follow-up delay of the turning angle caused by a friction in the turning mechanism by performing filter processing to velocity information. The turning angle control section performs compensation by the compensation motor current command value in calculation of the motor current command value, and the control apparatus controls the turning mechanism based on the motor current command value.Type: GrantFiled: March 6, 2020Date of Patent: September 24, 2024Assignee: NSK LTD.Inventor: Takahiro Tsubaki
-
Publication number: 20240308326Abstract: A ball bearing on one rotary shaft, out of a first rotary shaft and a second rotary shaft, on which a rotation member corresponding to a larger value of a ratio out of values of ratios of a rotation speed of a first rotation member and a rotation speed of a second rotation member relative to a rotation speed of a third rotation member is arranged does not include an inner race. Thereby, a ball PCD can be reduced while securing durability of a ball bearing on the one rotary shaft, and dragging loss between balls of the ball bearing and the inner race can be reduced. Since the ball bearing integrally configured with the rotary shaft is arranged on the one rotary shaft, reducing dragging loss of the ball bearing relatively largely reduces motive power loss on the third rotary shaft due to dragging loss of the ball bearing.Type: ApplicationFiled: March 8, 2024Publication date: September 19, 2024Applicants: TOYOTA JIDOSHA KABUSHIKI KAISHA, NSK LTD.Inventors: Kazunori Sakai, Shinichiro Suenaga, Masayuki Ishibashi, Hiroyasu Yoshioka, Takahisa Nomoto
-
Patent number: 12085154Abstract: A ball screw device has: a screw shaft rotationally moving during use, a nut having a protruding non-rotating side engaging portion at an end portion on one side in an axial direction, the nut linearly moving during use, balls arranged between a shaft-side and nut-side grooves, and a driving member fixed to the screw shaft having an arc-shaped rotating-side engaging groove portion into which the non-rotating side engaging portion can be inserted in the axial direction, and which can be engaged with the non-rotating side engaging portion in a circumferential direction.Type: GrantFiled: June 22, 2022Date of Patent: September 10, 2024Assignee: NSK LTD.Inventors: Ryo Segawa, Kazutaka Tanaka
-
Patent number: 12085165Abstract: A connecting structure includes a first member having a male screw portion on its outer-circumferential surface, a second member having a female screw portion on its inner-circumferential surface that is screwed with the male screw portion, a rotation restraining member placed between the first member and the second member and preventing relative rotation between the first member and the second member, and an elastic member applying elasticity in the axial direction between the first member and the second member.Type: GrantFiled: July 20, 2023Date of Patent: September 10, 2024Assignee: NSK LTD.Inventors: Hironori Mizuki, Masayoshi Shimizuya, Susumu Tanaka
-
Patent number: 12084122Abstract: A steering apparatus for vehicles that assists and controls a steering system includes a torsional angle control section that calculates a motor current command value to make the torsional angle follow a target torsional angle; the torsional angle control section includes a steering angle disturbance compensating section that calculates a first compensation motor current command value by performing filter processing to the detected steering angle, and the torsional angle control section performs compensation by the first compensation motor current command value in calculation of the motor current command value.Type: GrantFiled: December 13, 2019Date of Patent: September 10, 2024Assignee: NSK LTD.Inventors: Takahiro Tsubaki, Hiroyasu Kumagai
-
Patent number: 12077207Abstract: Provided is an outer tube including a solid-shaped male-shaft portion and a bottomed cylindrical female-tube portion integrally formed with the male shaft portion. A hole cover is externally fitted to the female-tube portion and closes a gap between a dash panel separating the vehicle cabin interior and the vehicle cabin exterior of a vehicle body and the outer tube. In an assembled state in the vehicle body, the solid male-shaft portion is arranged in the vehicle cabin exterior, and an opening portion of a slide hole provided in the female-tube portion is arranged in the vehicle cabin interior.Type: GrantFiled: November 5, 2020Date of Patent: September 3, 2024Assignee: NSK LTD.Inventors: Seiichi Moriyama, Keisuke Nakao, Kaname Yasuda, Naofumi Fujita
-
Patent number: 12077208Abstract: A steering device includes a cylindrical steering column that extends in an axial direction. The steering column includes: an upper column; a lower column; and a fixing member. The fixing member includes a cylindrical part, and the cylindrical part includes: a small diameter part that is fitted to the lower column; a curved part that has an outer circumferential surface whose outer diameter increases toward the other side in the axial direction; and a large diameter part whose outer diameter is larger than an outer diameter of the small diameter part.Type: GrantFiled: February 2, 2022Date of Patent: September 3, 2024Assignee: NSK LTD.Inventors: Suguru Sugishita, Hirotaka Shimizu, Kouhei Takeishi
-
Patent number: 12072004Abstract: A linear actuator of the present disclosure includes a ball screw device, a piston, and a rotation stopper. A screw shaft includes a screw shaft body, a male spline portion, and a step surface. A nut includes a first end surface, a first opening portion, and a first stopper. The piston includes a piston body, a cylindrical portion having a cylindrical shape, protruding in a second direction from a central portion of an opposite surface, and fitted into the male spline portion, and a second stopper protruding in the second direction from the opposite surface. The first stopper and the second stopper abut on each other and form the rotation stopper when the screw shaft is at an initial position. The step surface is arranged in the second direction compared to the first opening portion and is located inside the nut when the screw shaft is at the initial position.Type: GrantFiled: April 4, 2023Date of Patent: August 27, 2024Assignee: NSK LTD.Inventor: Motoshi Sakai
-
Publication number: 20240269946Abstract: A method for producing a composite material molded article includes a process of, from a solution in which reinforcing fibers with an average fiber length of 0.5 mm or more and thermosetting resin are dispersed and mixed in a solvent, removing the solvent by paper-making to form a preform, and a process of press molding the obtained preform using a mold set at a temperature equal to or higher than a curing temperature of the thermosetting resin to form the composite material molded article.Type: ApplicationFiled: May 13, 2022Publication date: August 15, 2024Applicant: NSK LTDInventors: Takuya TSUNEMASU, Tomoaki MATSUMOTO
