SYNCHRONIZER MECHANISM OPERATION [J65M-R]
B3E051500000T01
Neutral Position
• In the neutral position, the clutch hub sleeve and blocker bars are centered. There is no connection between the clutch hub sleeve and the gear so the gear turns freely on the shaft.
Synchronizing Position
• When the shift fork is moved, the clutch hub sleeve is slid towards the gear. Due to this, the clutch hub sleeve carries three blocker bars which move the synchronizer ring axially and press it onto the friction surface of the gear.
• As long as there is a difference in the speed of rotation between the clutch hub sleeve and the gear, a friction force is produced which turns the synchronizer ring until the tooth flanks rest on the side of the clutch hub.
• The clutch hub sleeve still cannot move any further as the tooth flanks of the synchronizer ring bar further movement.
• The friction between the friction surfaces of the synchronizer ring and the gear cause the gear, clutch hub sleeve and shaft to turn at the same speed.
Shift Position
• Once the clutch hub sleeve and gear are turning at the same speed, circumferential force no longer acts on the synchronizer and clutch hub sleeves.
• The force acting on the clutch hub sleeve turns the synchronizer ring backwards, eliminating the barrier.
• The clutch hub sleeve slides on to the teeth of the gear. The connection between the shaft and the gear is established.