Construction machinery and equipment under JG/T5057.40-1995 high strength fasteners Standard: high-strength bolts, nuts, dismounted again after use, generally not more than twice.hoist gantry crane Remove the bolt and the nut must be free of any damage, deformation, slip teeth, missing teeth, rust, screw roughness changes in the larger phenomenon. The actual use of the user can do very little, but must pay attention to strengthening the inspection of high strength fasteners, fastening, maintenance, and periodic replacement, to avoid mix.
Pin shedding caused the accident
a, cotter pin traverse cut off the trigger pin
b, the installation does not install or replace the cotter pin with pliers wire
c, do not install the platen or cotter pin that will pin and structural welding; (pin weldability due to the difference in the shock impact is very easy to open welding,overhead gantry crane causing the pin to fall off.)
d, Shaft damper spring pad or fastening bolts without tightening is not strong long-term vibration and fall off,Steel crane do not work cause the pin off the platen
e, triangular baffle arm joints deformed due to repeated removal or open solder, lead off boom pin.
bridge gantry crane
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