68
68
Fig6.6 Lift cylinder
Fig6.6 Lift cylinder
5.
5. Guide
Guide sleeve
sleeve
6. O-ring
6. O-ring
7.
7. Cylinder
Cylinder head
head
8. Bushing
8. Bushing
9.
9. Cylinder
Cylinder body
body
10.
10. Piston
Piston rod
rod
11. Piston
11. Piston
12.
12. Oil
Oil seal,
seal, piston
piston
13.
13. Oil
Oil seal
seal
14. Ring
14. Ring
15.
15. Snap
Snap ring
ring
16.
16. Cut-off
Cut-off valve
valve
17.
17. Spring
Spring lock
lock ring
ring
18.
18. Cotter
Cotter pin
pin
19.
19. Nut,
Nut, lock
lock
20.
20. Adjust
Adjust nut
nut
21. Joint
21. Joint
22. Chain
22. Chain
23. Sheave
23. Sheave
6.6 Flow
6.6 Flow regulator valve
regulator valve
The flow regulator valve, located in the lift cylinder circuit to limiting the descending
The flow regulator valve, located in the lift cylinder circuit to limiting the descending
speed of loaded forks, has the construction as shown in Fig6.7. When the lift spool valve
speed of loaded forks, has the construction as shown in Fig6.7. When the lift spool valve
is placed in the
is placed in the
“lift” position, the oil from the control v
“lift” position, the oil from the control v
alve flows through the oil chambers
alve flows through the oil chambers
A
A and
and B,
B, oil
oil holes
holes C,
C, D,
D, E
E and
and F
F,
, and
and the
the chamber
chamber G
G to
to the
the lift
lift cylinder
cylinder without
without any
any
regulation. When the lift spool valve is placed in the
regulation. When the lift spool valve is placed in the
“down” position, the oil flows in the
“down” position, the oil flows in the
reverse position. When the oil passes the throttle plate(5) and a pressure difference
reverse position. When the oil passes the throttle plate(5) and a pressure difference
overcomes the force of the spring(2) and moves the valve core (7) right, thus the oil flow
overcomes the force of the spring(2) and moves the valve core (7) right, thus the oil flow
being decreased by narrowing of the hole D and C, and reduces the oil flow passing
being decreased by narrowing of the hole D and C, and reduces the oil flow passing
through the throttle plate(5).
through the throttle plate(5).
The flow regulator valve
The flow regulator valve controls the goods descending speed and serves as a
controls the goods descending speed and serves as a safety
safety
device, prevent the danger for suddenly descending if the rubber hose ruptures between
device, prevent the danger for suddenly descending if the rubber hose ruptures between
the control valve and the lift
the control valve and the lift cylinder
cylinder..
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