GF26.50-D-2000H Single-Cone Synchronization Component Description
GF26.50-D-2000H Single-cone Synchronization Component Description
- Transmission 711.6
Shown: 5th/6th gear single cone synchronization on NSG 370 and on NSG 400
2 Main shaft
19 5th/6th gear single cone synchronization
20 Reverse gear single cone synchronization
Location
5th/6th gear single cone synchronization and reverse gear single cone synchronization is located on the main shaft.
Task
The task of single cone synchronization consists of bringing the idler gears of 5, 6 gears and reverse gear to synchronous operation with the associated shaft through dynamic friction in order to permit faultless and silent shifting.
Single cone synchronization offers the following advantages:
^ Fast synchronization
^ Low shift forces
^ Long service life, i.e. low wear and even friction value
Design of single cone synchronization of 5th/6th gear on NSG 370 and on NSG 400
2 Main shaft
13 Constant gear on drive shaft
14 6th gear idler gear
35 Synchronizer ring
36 Sliding sleeve
37 Synchronizer body
39 Needle roller bearing
40 Thrust piece
Shown: Single cone synchronization of reverse gear on New Manual Transmission 370 and on New Manual Transmission 400
2 Main shaft
15 Reverse gear idler gear
35 Synchronizer ring
36 Sliding sleeve
37 Synchronizer body
39 Needle roller bearing
40 Thrust piece
Function of 5th, 6th gear synchronization
When the gear is not engaged the sliding sleeve is held on the synchronizer body by the thrust pieces. The constant gear runs fixed on the drive shaft at the same time and the 6th gear idler gear runs loose on the main shaft at the same time.
When shifting the sliding sleeve is pushed towards the 6th gear idler gear or the constant gear by the 5th, 6th gear gearshift arm. The 3 thrust pieces are pressed against the synchronizer ring. As a result they displace this axially and press it against the beveled friction ring of the 6th gear idler gear or the constant gear.
As long as the sliding sleeve and 6th gear idler gear or the constant gear turn at different speeds, a friction torque occurs which twists the synchronizer ring until the 3 thrust pieces abut on the side of its cutouts. As a result the blocking teeth are now located in front of the shift dogs of the sliding sleeve and block the displacement of the sliding sleeve.
Dynamic friction between the friction ring, the synchronizer ring and the 6th gear idler gear or the constant gear means that the 6th gear idler gear or the constant gear is accelerated or braked and synchronous movement between the 6th gear idler gear or the constant gear and sliding When shifting the sliding sleeve is pushed towards the 6th gear idler sleeve is produced.
Once synchronous movement is produced between the 6th gear idler gear or the constant gear and the sliding sleeve, a circumferential force no longer acts on the synchronizer ring. It allows itself to be turned back by the bevels on the sliding sleeve claws. The sliding sleeve is therefore no longer blocked and can be pushed over the shift teeth of the 6th gear idler gear or constant gear. The connection is made between the main shaft and 6th gear idler gear and the constant gear.
Function of reverse gear synchronization
When reverse gear is not engaged the sliding sleeve is held on the synchronizer body by the thrust pieces. The reverse gear idler gear runs loose on the reverse gear at the same time.
When shifting the sliding sleeve is pushed towards the reverse gear idler gear by the reverse gear shift fork. The 3 thrust pieces are pressed against the synchronizer ring. As a result they move this axially and press it against the beveled friction ring of the reverse gear idler gear.
As long as the sliding sleeve and reverse gear idler gear rotate at different speeds, a friction torque arises which twists the synchronizer ring until the 3 thrust pieces abut the side of its recesses As a result the blocking teeth are now located in front of the shift dogs of the sliding sleeve and block the displacement of the sliding sleeve.
By dynamic friction between the friction ring, the synchronizer ring and reverse gear idler gear the latter is accelerated or braked and thus synchronization is produced between the reverse gear idler gear and the sliding sleeve.
Once synchronization is produced between the reverse gear idler gear and the sliding sleeve, a circumferential force no longer acts on the synchronizer ring. It allows itself to be turned back by the bevels on the sliding sleeve claws. The sliding sleeve is therefore no longer blocked and can be pushed over the shift teeth of the reverse gear idler gear. The connection between the main shaft and the reverse gear idler gear is made.