A synchronizing arrangement in a planetary gear has an axially movable ring gear
which for various gearchange positions can be coupled to either of two coupling
rings, situated on their respective sides of the planetary gear, via synchronizing
rings which belong to these coupling rings, are capable of limited rotation relative
to the ring gear and have external locking teeth to prevent gear engagement before
synchronization is achieved. The ring gear is provided with two grooves which run
round its inside and each accommodates a ring-shaped locking device for transferring
axial force to the respective synchronizing ring at the time of gear engagement.
The respective locking device is also situated in an external groove in the relating
synchronizing ring and can be compressed in the radial direction.
