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1. 发明公开

EP4187117A1 POWER TRANSMISSION PATH SWITCHING DEVICE AND TWO-SPEED TRANSMISSION 审中-实审
公开(公告)号：EP4187117A1
公开(公告)日：2023-05-31
申请号：EP21845965.9
申请日：2021-06-29
申请人： NSK Ltd.
发明人： YAMAMOTO, Akihiro , KISHIDA, Hirotaka
IPC分类号： F16D13/52 , F16D28/00 , F16H63/18 , F16H63/34 , F16D41/12 , F16D23/12 , F16H61/32 , F16H3/48 , F16H3/54
摘要： [Problem] To enable switching of a two-stage transmission capable of switching a reduction ratio between two stages: high and low, to a parking-lock mode, and prevent the two-stage transmission from being accidentally switched to the parking-lock mode, and further, to reduce a force required to release the parking-lock mode as necessary.
[Solution] When switching a two-stage transmission (1) to a parking-lock mode, an electric actuator (58) rotates and drives a drive cam (50), which first switches a power transmission path switching device (5) to a first mode in which a friction engaging device (40) is connected and a rotation transmission state switching device (41) is set to a free mode, then with the friction engaging device (40) maintained in the connected state, switches the rotation transmission state switching device (41) to a lock mode. When releasing the parking-lock mode, the power transmission path switching device (5) is switched to the first mode by disconnecting the friction engaging device (40) with the rotation transmission state switching device (41) maintained in the lock mode.

2. 发明公开

EP4321773A1 DIFFERENTIAL DEVICE 审中-实审
公开(公告)号：EP4321773A1
公开(公告)日：2024-02-14
申请号：EP22784434.7
申请日：2022-03-14
申请人： NSK Ltd.
发明人： YAMAMOTO, Akihiro , INOUE, Eiji
IPC分类号： F16H48/08
摘要： Provided is a structure capable of easily switching between enabling or disabling torque transmission between the drive wheels and the power transmission mechanism.
An input member 8 having a ring gear 14 to which torque is input from the final gear and a case member 9 supporting pinion gears 11 are combined though a one-way clutch 10. The one-way clutch 10 transmits torque between the input member 8 and the case member 9 only when the input member 8 attempts to rotate relative to the case member 9 in the normal rotation direction.

3. 发明公开

EP4227550A1 TWO-SPEED TRANSMISSION 审中-实审
公开(公告)号：EP4227550A1
公开(公告)日：2023-08-16
申请号：EP21877261.4
申请日：2021-08-27
申请人： NSK Ltd.
发明人： YAMAMOTO, Akihiro , KISHIDA, Hirotaka
IPC分类号： F16D28/00 , F16H3/54 , F16H3/58
摘要： [Problem] To achieve a structure of a two-speed transmission capable of ensuring good torque transmission efficiency.
[Solution] A two-speed transmission includes: an input member capable of rotating with respect to a fixed portion; an output member coaxial with the input member and capable of relative rotation therewith; a rotating member coaxial with the input member and the output member and capable of relative rotation therewith; a first engaging device configured to switch engagement between a first friction plate and a second friction plate to switch between a state in which the input member and the rotating member rotate integrally or relative to each other; a second engaging device configured to switch the rotating member to a rotatable or non-rotatable state; an elastic biasing means configured to apply a force pressing the first friction plate and the second friction plate against each other; a pressing device configured to release 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 of these.

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