Large-span variable-capacity grab bucket

Abstract

The invention relates to a large-span variable-capacity grab bucket which is particularly used for grabbing materials with different specific gravities, belonging to the technical field of crane equipment. The large-span variable-capacity grab bucket mainly comprises a bucket body, a connecting rod, a main rib plate, a lower bearer, an upper bearer, lifting ropes, an upper pulley wheel set, a lower pulley wheel set, a bearing balance beam, support rods and a variable-capacity plate, wherein two ends of the bearing balance beam are connected with the lifting ropes; the middle of the bearing balance beam is connected with the upper bearer in a hinging way; the two sides of the upper bearer are respectively connected with the two support rods in a hinging way; the lower ends of the support rods are articulated with the bucket body; the lower bearer is connected with the bucket body by the connecting rod; the lower bearer is connected with the connecting rod in a hinging way; and the bucket body comprises two left / right symmetrical bucket valves, and the tail end of the bucket body is connected with the variable-capacity plate. The large-span variable-capacity grab bucket is simple, compact and reasonable in structure, can realize the large-span variable capacity of the grab bucket and grabs the materials with great different specific gravities, such as coal and ore, and is high in work efficiency, so that the equipment cost can be reduced.

Description

technical field [0001] The invention relates to a large-span variable-capacity grab bucket, specifically for grabbing materials with different specific gravity, and belongs to the technical field of crane equipment. Background technique [0002] Multi-lobe grabs are mainly used in freight terminals, port machinery plants, power plants, shipyards, steel mills and other industries to grab bulk cargo of various specific gravity. [0003] If the multi-lobe grab does not have a variable bucket capacity structure, it cannot be used universally among materials with different specific gravity when grabbing materials. For example, using a grab bucket for grabbing materials with a large specific gravity such as ore to grab materials with a small specific gravity is seriously inefficient; grabbing a grab bucket with a small specific gravity such as coal for grabbing materials with a large specific gravity will seriously overload. [0004] In the prior art, the ordinary variable capaci...

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Problems solved by technology

[0003] If the multi-lobe grab does not have a variable bucket capacity structure, it cannot be used universally among materials with different specific gravity when grabbing materials.

For example, if a grab bucket is used to grab materials with a large specific gravity such as ore to grab materials with a small specific gravity, the efficiency is seriously low; if a grab bucket with a small specific gravity such as coal is used to grab materials with a large specific gravity, it will be seriously overloaded.

[0004] In the prior art, the ordinary variable capacity grab structure is to cut off a section at the end of the original grab bottom plate, and then add a section of detachable plate to achieve the effect of variable capacity. The span of such a variable capacity structure is very small. , it can only achieve the purpose of variable volume between materials with similar specific gravity, and cannot be used to grab materials with large differences in specific gravity such as coal and ore at the same time, otherwise it will cause serious overload or low efficiency

Coal scuttle and ore need two types of grab buckets to grab separately, which increases the cost

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