Single-magnification lifting hook and crane

Abstract

The invention relates to a single-magnification lifting hook and a crane. The single-magnification lifting hook comprises a lifting lug assembly, a hook head assembly, a base and at least one weighing block, wherein the lifting lug assembly, the hook head assembly and the base are detachably connected in sequence; all the weighing blocks are sequentially overlapped on the top of the base, and two adjacent weighing blocks are detachably connected; and the lifting lug assembly is connected to the top of the weighing blocks. The weight of the single-magnification lifting hook provided by the invention can be regulated according to actual working conditions.

Description

technical field [0001] The invention relates to the field of engineering machinery, in particular to a single-rate lifting hook and a crane with the single-rate lifting hook. Background technique [0002] With the development of crawler cranes in the direction of large tonnage, there are more and more combinations of working conditions, and the types of lifting hooks (hereinafter referred to as "hooks") are also increasing, and the problems encountered by the hooks during operation are also highlighted. come out. Theoretically, the crane has a rated lifting capacity corresponding to its model, and the rated lifting capacity should be equal to the weight of the hook and the total weight of the heavy object being hoisted. Therefore, when the model of the crane is certain, that is, when the rated lifting capacity is a fixed value, the lighter the weight of the hook, the better. [0003] However, once the weight of the hook is reduced, there will be a possibility that the hook...

AI Technical Summary

Problems solved by technology

When the rated lifting capacity of the crane is constant, the total weight of the heavy objects it can hoist will decrease, that is, the hoisting capacity will decrease.

This leads to the fact that the hook can continue to be used to lift heavy objects under certain working conditions, but because the hook is too heavy, the total weight of the heavy objects that can be lifted exceeds the rated lifting capacity of the crane. At this time, it has to be replaced. New hooks (lighter hooks) and even larger tonnage cranes can meet the working conditions

In this case, the cost will inevitably increase, and it will also bring more inconvenience to users.

[0008] In addition, by image 3 It can be seen that the oil injection hole 34' is covered by the external weight 1', and the external weight 1' and the base 2' need to be removed every time grease is added, which is inconvenient to use

At the same time, the existing base 2' and the lifting lug on it are processed as a whole, and the utilization rate of some processing materials is low, and the processing process is relatively cumbersome, and the manufacturing cost is relatively high

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