DOUBLE TRUSS SINGLE BRIDGE CRANES
|
DESIGN, FEATURES &
SPECIFICATIONS :- MAIN
GIRDER :
1) Economical design, using bigger cross section of
crane with lesser amount of steel.
2) Special lightweight construction of the crane
reduces load stress on building supports.
3) Low Headroom ensuring maximum lift.
4) Easy accessibility for maintenance.
5) Bigger cross section ensures lesser vibrations
in girder. |
 |
CROSS TRAVEL DRIVE:
The use of a motor driven trolley with the hoist greatly
increases the speed and efficiency of load handling. Steel frame
side plates extend beyond wheels for end stop contact. Wheels
are with contoured tread for use on standard tapered or wide
flange flat beams. Traverse gear reducer is conservatively-rated
rugged drive reducer with output pinion meshing with machine cut
wheel gears.
LONG TRAVEL DRIVE :
It comprises of an arrangement of solid shafts and floating
shafts coupled by universal couplings and supported on pedestals
blocks. The arrangement is driven by a crane duty foot mounted
motor transmitting torque to heavy duty shaft mounted gear box,
which transmits torque to output pinion, this pinion meshes with
machine cut wheel gears. Rail sweeps are provided on end
carriages and crab frame ends to clear of any object left on or
learning against the rail ahead of the crane wheels. Rubbers
Buffers are also provided an end-carriages & crab.
A Special Soft Start Unit is coupled to the LT Drive to ensure a
smooth, cushioned & jerk free start.
HOIST:
HOIST MOTOR :
Specifically designed for high starting torque hoisting
service, half-hour rated with permanently lubricated bearings
suitable for frequent reversals as well as braking.
HOIST BRAKE :
The Hoist Brake is fitted with an electromagnetic brake
designed and built to arrest and hold safely the full load
capacity of the hoist. The brake provides a fail to safety
feature and failure of current immediately applies the brake.
BOTTOM BLOCK :
Full rotating lower hook is high strength forged steel.
Thrust bearings make swiveling easy even under load.
GEARING :
Spur & Helical Gears cut from alloy steel and duly heat
treated as required are used in totally enclosed casing to
provide grease lubrication. Newer designs are lighter weight
because of improved material strength & manufacturing
techniques.
ELECTRICAL COMPONENTS :
All electrical controls are centralized within one enclosure
with removable cover to access for easy servicing. Control
circuit provides reduced voltage at the Push Button station,
with 110 volts being standard. Under the new control system,
operation is often much more gentle on components, lowering
shock loads and heat buildup.
LIMIT SWITCH :
Positive action limit switch will prevent over travel beyond
set limits in either direction. (Optional if desired for CT and
LT).
PUSH BUTTON STATION :
Weather proof as standard, giving sure grip, one handed
control. Station has built-in steel strain relief, permits
pulling of unloaded hoist along track.
All components generally designed in compliance with is-so 7 &
is-3177
●
Single Girder Cranes
●
Double Girder Cranes ●
Underslung Cranes ●
Gantry Cranes
●
Wire Rope Hoists ●
Goods Lifts ●
Rope lock Pulley
Blocks
●
Jib
Cranes ●
Double Truss
Single Bridge Crane
|
