Classification by drive

Press the drive can be divided into mechanical and hydraulic grab grab two categories.
Hydraulic grab crane
Hydraulic grab itself with the opening and closing structure, generally with Hand stacker cylinders driven by a plurality of hydraulic jaw plates, also called hydraulic claw grab. Hydraulic grab the hydraulic class-specific equipment used widely.
Mechanical gra
Grab mechanical structure itself is not configured to open and close, usually driven by a rope or rod force, operating characteristics can be divided by double rope grab and single-rope grab, the most commonly used is the double rope grab.
Two rope grab opening and closing of supporting rope rope around the supporting bodies, respectively opening and closing mechanism of the roll. Double rope grab, reliable, easy to operate, high productivity, widely used. Using two sets of double rope after a four rope grab, work processes and the same double rope grab.
Support single rope grab ropes and opening and closing with a rope with a rope. The rope through a special locking device for opening and closing alternately supportive role. Grab the single rope winding mechanism is relatively simple, but the production is low, a large number of loading and unloading operations rarely used.