Short arm-tie type grab bucket

Abstract

The present invention aims to design a kind of short strut type grab, comprising opening and closing rope, supporting rope, supporting rope rack, retaining rope wheel group, bucket body jaw plate, middle beam hinged with the bucket body jaw plate, and Two connecting devices, wherein, the jaw plate of the bucket body is hinged to the middle beam and has a hinge point, a middle beam pulley block is arranged on the hinge point, and a center beam guide wheel set is arranged on the middle beam, short The strut-type grab is symmetrically arranged left and right, and its feature is that it also includes: two upper struts on the left and right, the upper ends of which are hinged with the middle beam; two lower struts on the left and right, respectively hinged with the lower ends of the two upper struts on the left and right The left and right two strut pulleys are respectively installed at the hinge points of the left and right upper struts and the lower struts. The invention can adjust the grasping capacity by changing the magnification of the rope pulley group to adapt to different materials, and has the characteristics of strong grasping capacity, simple structure, convenient maintenance, reliable performance and long service life.

Description

technical field [0001] The invention relates to a grabbing device for a hoisting machine, in particular to a short-bracing grab bucket. Background technique [0002] Grabs have been used in the bulk material handling industry and industrial production for more than 100 years. Today, they are mainly divided into two categories: long pole grabs and scissor grabs. [0003] Currently widely used are mainly long pole grabs and scissor grabs on large crane loading and unloading machinery. [0004] Both types of grabs have advantages and disadvantages. The advantage of the long strut grab is that the grabbing force and digging force are large at the beginning of closing, but the disadvantage is that the closing force tends to weaken when the jaw plate of the grabbing bucket is close to closing. The scissor grab has more advantages than the long pole grab, mainly because the grabbing and closing force tends to increase with the progress of the closing movement of the grab, but its...

AI Technical Summary

Problems solved by technology

The advantage of the long strut grab is that the grabbing force and digging force are large at the beginning of closing, but the disadvantage is that the closing force tends to weaken when the jaw plate of the grabbing bucket is close to closing

The scissor grab has more advantages than the long pole grab, mainly because the grabbing and closing force tends to increase with the progress of the closing movement of the grab, but its disadvantage is that the grabbing force and digging force are small at the beginning of closing, Based on raking

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