Method of secondary speed reduction of aerial work platform and device adopting the same

Abstract

The invention discloses a method of secondary speed reduction of an aerial work platform and a device adopting the same. The method of the secondary speed reduction of the aerial work platform and thedevice adopting the same have the beneficial effects that the structure is simple, failure rate is low, cost is low, effect is obvious, and popularization is easy and the like; the method is mainly realized by adding an automatic reversing two-way electromagnetic valve in a traditional descending oil return way, namely the descending oil return way is automatically switched to an oil path with adamping function to realize slow and stable descending of a platform again and reduce the impact among fork frames at all stages, and the service life of buffer pads among the fork frames is prolonged; the stability and the safety performance of a whole machine and the platform are greatly improved; and meanwhile, the invention also fills a blank of realizing the secondary speed reduction of the aerial work platform in the industry.

Description

technical field [0001] The invention relates to the field of aerial work equipment, in particular to a method and device for secondary speed reduction of aerial work platforms. Background technique [0002] Aerial work platform (Aerial work platform) is a product that serves mobile aerial work such as aerial work, equipment installation, and maintenance in various industries. The related products of aerial work platforms mainly include: scissor type aerial work platform, trailer type aerial work platform, articulating arm type aerial work platform, straight arm type aerial work platform, aluminum alloy aerial work platform, cylinder type aerial work platform, spider type Seven categories of aerial work platforms. [0003] Section 5.4.4 of GB 25849-2010 entanglement and shearing mentions: "When the scissor platform is still at 10%-15% of the total lifting stroke, but not less than 3.5m, the descent should stop, and the operator must When the descent function is activated ...

AI Technical Summary

Problems solved by technology

[0004] The existing scissor-type aerial work platforms on the market use the whole process of low-speed landing when landing, and there are also the following problems: when the fork frame is lowered to a low position, when the lifting cylinder is retracted to about 160mm, the force on the oil cylinder will be lower when the fork frame is lowered. When it reaches a low position, it gets bigger and bigger, so the speed of descent will also accelerate until it falls completely quickly

At this time, the impact at the moment of complete landing will be very large, which will bring greater impact to the vehicle, the platform and the cushion of the fork frame, and the safety factor of the platform will also be reduced accordingly.

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