A scissor grab bucket refers to a grab bucket designed to look like a pair of scissors, a kind of rope scissor grab, as a mechanical scissor grab.
Structure Principle
Structural design:
The scissor grab buckets mainly consist of a balance frame, forearm, jaw plate, center hinge shaft, and pulley set.
Scissor Grab Bucket connects the two jaws of the grab through a central hinge point, and the end of the jaws extends into a rope-type reinforcing arm. Relying on the tension of the cable of the pulley block, it uses the principle of leverage to increase the force of the jaws closing to grab materials, and the opening action relies on the relaxation of the cable of the pulley block to complete.
Working principle:
When opening, the grapple's pulley group wire rope on the shear arm is released and the support rope is tightened to open the jaw; when closing, the grab's pulley group wire rope is tightened and the force is increased by using the lever principle to close the jaw and grip the material, the closing torque gradually increases during the closing process.
Advantageous features
Lightweight
Scissor Grab has the feature of being lightweight, which can reduce the load requirement on the lifting equipment in the process of lifting.
A large gripping surface
Scissor Grabs have a large gripping surface, which can cover a large area in one gripping operation and improve the gripping efficiency.
High gripping efficiency
The scissor grab buckets can quickly and effectively complete the material gripping, loading, and unloading work and can achieve a high operation frequency.
High gripping ratio
The grab's gripping ratio is more than 2, i.e. the ratio of the weight of the material gripped by the grab and the weight of the grab itself is more than 2, which reflects its good gripping ability and working performance.
Applications
The scissor grab buckets mainly used in large ship unloaders and other equipment for all kinds of bulk material loading and unloading operations, such as coal, ore, grain, and other bulk material gripping and handling, in harbors, wharves, mines, power plants, and other places to play an important role.
