公开(公告)号：US11326649B2

公开(公告)日：2022-05-10

申请号：US16494376

申请日：2018-03-08

申请人： NTN CORPORATION

发明人： Masazumi Kobayashi ,  Tomoshige Kobayashi

IPC分类号： F16D3/223 ,  F16D3/2245 ,  F16C3/02 ,  F16D3/227

摘要： A rear-wheel drive shaft (1) includes a fixed type constant velocity universal joint (3), a plunging type constant velocity universal joint (2), and an intermediate shaft (4) coupling both the constant velocity universal joints to each other. A ratio (PCDBALL(f)/DBALL(f)) of a pitch circle diameter (PCDBALL(f)) of balls (33) of the fixed type constant velocity universal joint (3) to a diameter (DBALL(f)) of each of the balls (33) is set from 3.70 to 3.87. A ratio (PCDBALL(s)/DBALL(s)) of a pitch circle diameter (PCDBALL(s)) of balls (23) of the plunging type constant velocity universal joint (2) to a diameter (DBALL(s)) of each of the balls (23) is set from 3.3 to 3.6.

公开(公告)号：US20220136562A1

公开(公告)日：2022-05-05

申请号：US17434793

申请日：2020-02-28

申请人： NTN Corporation

发明人： Takayasu TAKUBO ,  Takayuki OWADA ,  Akihiko KATAYAMA

IPC分类号： F16C43/04 ,  F16C19/18 ,  F16C25/08 ,  F16C33/78 ,  G01L5/26

摘要： A preload inspection method for a bearing device for a vehicle wheel comprises: a first bearing preload value calculation step for calculating a first bearing preload value; a first rotating torque measurement step for measuring a first rotating torque; a caulking step for swaging the small-diameter stepped part to the inner ring; a second bearing preload value calculation step for calculating a second bearing preload value; a second rotational torque measurement step for measuring a second rotational torque; a third bearing preload value calculation step for calculating a third bearing preload value by adding, to the first bearing preload value, a preload change amount based on a differential torque between the first rotating torque and the second rotating torque; and a determination step for determining the suitability of the preload from the second bearing preload value and the third bearing preload value.

公开(公告)号：US11311930B2

公开(公告)日：2022-04-26

申请号：US16077191

申请日：2017-01-25

申请人： NTN CORPORATION

发明人： Jia Hua Miao

IPC分类号： B21J5/12 ,  B21K1/76

摘要： A method is used to forge an outer joint member of a constant velocity universal joint. Track grooves of the outer and inner joint members each have an arc-shaped ball raceway center line having a curvature center that is not offset in an axial direction with respect to a joint center. The forging method includes performing ironing by press-fitting a cylindrical portion of one end of a shaft portion of a pre-processing material of the outer joint member including the shaft portion and the cylindrical portion into a die hole of a die while a punch set that is radially expandable and contractable is fitted to an inner peripheral surface of the cylindrical portion. The punch set includes punches and a punch base to guide the punches to enable advancing and retreating. Each of the punches has a pair of forming surfaces for forming the adjacent track grooves.

公开(公告)号：US11298976B2

公开(公告)日：2022-04-12

申请号：US17264614

申请日：2019-08-06

申请人： NTN Corporation

发明人： Ryou Sakurai ,  Adumi Nobukawa

IPC分类号： B60B27/00 ,  F16C41/00 ,  F16C35/00 ,  F16C35/077 ,  F16C33/78

摘要： In a bearing device for a vehicle wheel (1), a large-diameter section (2i) is formed on an outer side of a fitting cylinder section (2h), and a small-diameter section (2j) is formed on an inner side of the fitting cylinder section (2h). A cap member (8) is formed by bending a metal steel plate, and has a cover plate section (81) which closes the inner open end of an outer member (2) and a fitting section (82) which is fitted over the small-diameter section (2j). A tapered portion (83) based on the spring back angle θ of the fitting section (82) is provided at the outer peripheral edge of the outer end section of the fitting section (82).

公开(公告)号：US20220074449A1

公开(公告)日：2022-03-10

申请号：US17276405

申请日：2019-09-17

申请人： NTN Corporation

发明人： Hayato KAWAGUCHI

IPC分类号： F16C33/58 ,  F16C19/06 ,  F16C35/067

摘要： A bearing assembly is proposed including a rolling bearing of which a bearing ring is fitted to the mating member, i.e., a shaft or a housing, with a clearance fit. Of the bearing ring and the mating member, the bearing ring has a flank face that separates a fitting surface of the bearing ring across the entire width thereof. The flank face defines a radial gap between the bearing ring and the housing. In a load receiving region where the radial gap remains, a portion of the bearing ring which is deformed in a wave-shaped pattern is kept out of contact with the fitting surface of the housing. The wave-shaped deformation of the bearing ring does not act as traveling waves that cause creep of the bearing ring.

公开(公告)号：US11268571B2

公开(公告)日：2022-03-08

申请号：US16319605

申请日：2017-06-29

申请人： NTN CORPORATION

发明人： Tomoki Matsushita

IPC分类号： F16C19/36 ,  F16C33/36 ,  F16C19/38

摘要： A tapered roller bearing for an automobile includes an inner ring including a raceway surface having a tapered shape on an outer periphery, an outer ring including a raceway surface having a tapered shape on an inner periphery, a plurality of tapered rollers incorporated into a space defined between the raceway surfaces, and a retainer configured to receive the tapered rollers. The inner and outer rings are each made of carburized steel, and the raceway surfaces of the inner and outer rings each have a straight generating line shape. The tapered rollers each are made of high carbon chromium bearing steel, and each have a rolling surface including a straight portion, which is formed at a center portion in an axial direction, and crowning portions, which extend from the straight portion to both end portions. The crowning portions are each formed of logarithmic crowning.

公开(公告)号：US11247333B2

公开(公告)日：2022-02-15

申请号：US16809153

申请日：2020-03-04

申请人： NTN CORPORATION

发明人： Naoki Marui ,  Hiroshi Isobe

IPC分类号： B25J9/16 ,  B25J9/00 ,  B25J9/12

摘要： The parallel link mechanism is applied to a work device in which a link actuation device and a combined-side actuator are combined. A control device includes a storage that stores a plurality of work coordinates as well as a work-point movement velocity as a target velocity of an end effector and a posture change velocity as a target angular velocity to be set for changing the posture of the end effector. A controller includes a switching function unit that switches the target velocity used for calculating movement velocities of the respective posture control actuators and a movement velocity of the combined-side actuator, to the work-point movement velocity and to the posture change velocity.

公开(公告)号：US11247329B2

公开(公告)日：2022-02-15

申请号：US16217474

申请日：2018-12-12

申请人： NTN CORPORATION

发明人： Hiroshi Isobe ,  Seigo Sakata ,  Yuuki Shimura

IPC分类号： B25J9/00 ,  B25J19/06 ,  B25J9/10 ,  B25J9/12 ,  B25J9/16 ,  B25J9/02 ,  B25J11/00

摘要： A work device includes a work device body and a contact preventer. The work device body includes a linear motion unit having three degrees of freedom and a rotary unit having three degrees of freedom. An end effector is mounted on an output portion of the rotary unit. The contact preventer separates a working region in which the work device body is installed, from a non-working region outside the working region. The contact preventer includes: an entry allowing portion allowing an object to enter the working region therethrough; and an entry allowing portion entry detection sensor configured to detect entry of an object into the working region through the entry allowing portions.

公开(公告)号：US11231091B2

公开(公告)日：2022-01-25

申请号：US16477244

申请日：2018-01-11

申请人： NTN CORPORATION

发明人： Kouichi Onimaru ,  Eiji Maeno

IPC分类号： F16H7/08

摘要： A chain tensioner is formed with internal threads each including a push-in-side flank, a protruding-side flank, and a thread top face. The push-in-side flank has a flank angle which is larger than a flank angle of the protruding-side flank. The push-in-side flank and the protruding-side flank are rolled surfaces formed by rolling, and have a surface roughness smaller than Ra 1.0 μm. Each internal thread further includes, at a position at which the protruding-side flank intersects with the thread top face, a chamfer configured to receive a bulge resulting from excess materials pushed out from the protruding-side flank during formation of the internal thread by rolling.

公开(公告)号：US20220018114A1

公开(公告)日：2022-01-20

申请号：US17488552

申请日：2021-09-29

申请人： NTN CORPORATION

发明人： Mitsuru AKAGAWA ,  Ryosuke KARASAWA ,  Tomohisa OKUNO ,  Kaname NISHIMURA

IPC分类号： E04B1/348 ,  H02S10/40 ,  H02S20/24 ,  H02S10/12

摘要： Provided is a portable facility (1) including: a power generation unit (3) and a function unit (5), wherein the power generation unit (3) includes a transportable first housing (H1) and at least one power generation device attached to the first housing (H1), the first housing including a top wall (15), a bottom wall (17), and a surrounding wall (19), the at least one power generation device being one or more of a wind power generation device (7), a solar power generation device (9), and a hydraulic power generation device, and the function unit (5) includes a transportable second housing (H2) and an electric apparatus (11) disposed inside the second housing (H2) and configured to be powered by the power generation unit (3) to operate, the second housing including a top wall (15), a bottom wall (17), and a surrounding wall (19).