POWER TRANSMISSION PATH SWITCHING DEVICE AND TWO-SPEED TRANSMISSION

WIPO Patent Application WO/2022/019063

A1

[Problem] To enable switching the mode of a two-speed transmission, which is capable of switching between two stages of high and low speed reduction ratios, to a parking lock mode; to prevent the two-speed transmission from being inadvertently switched to the parking lock mode; and, as necessary, to reduce power that is required for cancelling the parking lock mode. [Solution] When a two-speed transmission 1 is to be switched to a parking lock mode, on the basis of rotational driving of a drive cam (50) by an electric actuator (58), a power transmission path switching device (5) is switched to a first mode in which a frictional engagement device (40) is connected and a rotation transmission state switching device (41) is in a free mode, and then the rotation transmission state switching device (41) is switched to a lock mode with the frictional engagement device (40) being maintained in the connected state. When the parking lock mode is to be cancelled, the frictional engagement device (40) is disconnected, with the lock mode of the rotation transmission state switching device (41) being maintained, so as to switch the power transmission path switching device (5) to the first mode.

YAMAMOTO AKIHIRO (JP)
KISHIDA HIROTAKA (JP)

PCT/JP2021/024614

January 27, 2022

June 29, 2021

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NSK LTD (JP)

F16D13/52; F16D23/12; F16D28/00; F16D41/12; F16H3/48; F16H3/54; F16H61/32; F16H63/18; F16H63/34

JP2019156016A	2019-09-19
JP2008082477A	2008-04-10
DE102016105991A1	2017-10-05
JPH05116549A	1993-05-14

KIWA INTERNATIONAL (JP)

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