Cardan Shaft - Belarus 3522.5 Operator's Manual

The gear 3 (figure 3.12.8) is mounted on shaft 4 splines and is in constant mesh
with gear 2 located in rear axle. The shaft 4 is mounted on rear axle case on ball bearings
1 and 5 and through spline couplings 15, 14 (figure 3.12.7) is connected by torsion bar 16
with driving disks 11.
At engaged drive oil from the hydraulic distributor of FDA control system is pumped
under pressure through channels "A" sealed with rings 4 in booster "Б", piston 9 clamp
disk11 and 12 pack, blocking driving and following parts of drive, torque moment is trans-
ferred through drum 13 splines to flange 1 and further through cardan shaft to main drive
of FDA.
At disengaged drive control system hydraulic distributor shut off oil flow to clutch, oil from
booster "Б" goes to drain, springs 10 return piston 9 in starting position and torque transfer
stops.

3.12.10 Cardan Shaft

1, 3 – seals; 2 – cross; 4 – oilier; 5 – bearing; 6, 9 – forks; 7 – tube; 8 – locking
ring; 10 – flange.
The cardan shaft of open type consists of two cardan joints and a tube having spline
connection. The cardan shaft is intended for torque transfer from drive clutch to FDA.
The cardan joint consists of flanges 10 (figure 3.12.9), forks 6, 9 and cross 2. In
flange and forks holes are mounted needle bearings 5 of crosses. Bearings are kept in
borings by lock rings 8. Thanks to lock rings of various standard sizes backlash in univer-
sal joints is adjusted at assembling. The manufacturer fills universal joints with long-term
greasing.
On universal joint crosses are mounted oilier 4 to refill lubricant in joints during op-
eration. To keep lubricant in bearings and to prevent moisture, dirt and dust ingress in
them, there are special face seals 3. To prevent dirt, dust and moisture ingress in spline
connection is mounted seal 1.
The cardan shaft in assembly is dynamically balanced. Flanges of cardan shaft are
connected by self-locking nuts through paper gaskets with clutch coupling of drive and
FDA main gear.
Figure 3.12.9 – Cardan shaft
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