Novel shearing fork arm and shearing fork type lifting platform

Abstract

The invention discloses a novel shearing fork arm and shearing fork type lifting platform which comprises an oil cylinder, inner moment pipes, an oil cylinder piston rod and an inner bracket, wherein the middle parts of the inner moment pipes and outer moment pipes are movably connected with shaft pins, and the middle parts of the inner moment pipes and the outer moment pipes are connected through the shaft pins in a rotatable manner; the inner moment pipes and the outer moment pipes are connected through the shaft pins to form shearing forks; two ends of the inner moment pipes and two ends of the outer moment pipes are movably connected with angle shafts; the two ends of the inner moment pipes and the two ends of the outer moment pipes are connected through the angle shafts in a rotatable manner; two sides of one end of each inner moment pipe are fixedly connected with piston lug plates. As relatively low stress is applied to the upper layer, the number of adopted shearing fork arms on the upper layer is small, and the sectional area of each shearing fork is small; as relatively high stress is applied to the lower layer, the number of adopted shearing fork arms on the lower layer is large, and the sectional area of each shearing fork is large; therefore, the novel shearing fork arm and shearing fork type lifting platform realizes lifting stably and has small shaking and low laterodeviation. Furthermore, by the adoption of a single oil cylinder for lifting, asynchronization caused by conventional lifting driven by multiple branch cylinders at the present is effectively prevented, and the deviation amount during lifting can be further reduced.

Description

technical field [0001] The invention relates to the technical field of lifting platforms, in particular to a novel scissor arm and scissor-type lifting platform. Background technique [0002] The scissor lift platform is a common lifting platform, which is used for the lifting of goods or personnel. It uses hydraulic cylinders as power, and the platform can be raised or lowered by changing the angle of the inner bracket of the scissor arm. [0003] For the large-height multi-layer scissor arm system, the force of the lower scissor arm is much greater than that of the upper part. The current scissor arm structure has the same weight as the upper layer and the lower layer, which makes the weight of the scissor arm too heavy. In other words, it is a great waste of material, and the weight of the same scissor arm on the upper and lower layers will cause the instability of the scissor arm after lifting, causing the possibility of the lifting platform rollover. Contents of the i...

AI Technical Summary

Problems solved by technology

[0003] For the large-height multi-layer scissor arm system, the force of the lower scissor arm is much greater than that of the upper part. The current scissor arm structure has the same weight as the upper layer and the lower layer, which makes the weight of the scissor arm too heavy. In other words, it is a great waste of materials, and the same weight of the scissor arms on the upper and lower layers will cause the instability of the scissor arms after lifting, resulting in the possibility of the lifting platform rolling over.

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