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公开(公告)号：US11982340B2
公开(公告)日：2024-05-14
申请号：US18030370
申请日：2021-08-27
Applicant: NSK Ltd.
Inventor： Akihiro Yamamoto , Hirotaka Kishida
IPC: F16H3/54
CPC classification number: F16H3/54 , F16H2200/0034
Abstract: A two-speed transmission includes: an input member; an output member; a rotating member; a first engaging device switching engagement between first and second friction plates to switch the input member and the rotating member to an integrally rotating state or a relatively rotating state; a second engaging device switching the rotating member to a rotatable or non-rotatable state; an elastic biasing means applying a force pressing the first and second friction plates; a pressing device releasing the pressing force; a first bearing between the elastic biasing means and the pressing device; a second bearing between the rotating member and the pressing device or the fixed portion; and a planetary speed reduction mechanism having a sun element connected to the input member or the rotating member, a carrier connected to one of the input member or the rotating member and the output member, and a ring element connected to the other.
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公开(公告)号：US11852228B2
公开(公告)日：2023-12-26
申请号：US18027276
申请日：2022-03-14
Applicant: NSK LTD.
Inventor： Akihiro Yamamoto , Eiji Inoue
CPC classification number: F16H48/24 , F16H48/08 , F16H2048/202
Abstract: A differential device includes: an input member; a case member arranged coaxially with the input member; a one-way clutch arranged between the input member and the case member and transmitting torque therebetween only when the input member attempts to rotate in a normal rotation direction; a pinion gear supported by the case member to rotate about the axis perpendicular to the center axis of the case member; and a pair of side gears supported coaxially with the input member to rotate relative to the input member and the case member and meshing with the pinion gear.
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公开(公告)号：US11493128B2
公开(公告)日：2022-11-08
申请号：US17632698
申请日：2020-12-11
Applicant: NSK LTD.
Inventor： Hirotaka Kishida , Ricardo Rodriguez Lopez , Seigou Urakami , Shohei Kaneko , Akihiro Yamamoto
Abstract: A cam device having a drive cam and a driven cam; and a friction engagement device having at least one friction plate and at least one separation plate are provided. The friction engagement device is configured so as to be put into a connected state by pressing the friction plate and the separation plate against each other by the driven cam, and a disconnected state. Also provided are a rotation transmission state switching device having a first member and a second member coaxially arranged, and a mode selecting part configured to rotate or displace in the axial direction according to rotation of the drive cam. The rotation transmission state switching device has at least one mode of a free mode and a lock mode of the first member and the second member, and a one-way clutch mode.
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公开(公告)号：US11867242B2
公开(公告)日：2024-01-09
申请号：US17790583
申请日：2021-06-29
Applicant: NSK Ltd.
Inventor： Akihiro Yamamoto , Hirotaka Kishida
CPC classification number: F16D47/04 , F16D13/52 , F16D41/12 , F16H3/54 , F16H2200/0034 , F16H2200/2005 , F16H2200/2033 , F16H2200/2035
Abstract: A power transmission path switching device has a friction engaging device; a rotation transmission state switching device comprising a first member and a second member arranged coaxial with each other and having: a free mode and/or a one-way clutch mode allowing rotation of the first member with respect to the second member, and a lock mode preventing rotation of the first member with respect to the second member; and a control device that, when connecting the friction engaging device and setting the rotation transmission state switching device to the lock mode, has a function of connecting the friction engaging device, and then while maintaining the friction engaging device in a connected state, switches the rotation transmission state switching device to the lock mode.
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