Opening-closing control mechanism for single-rope bucket grab

Abstract

The single chain bucket grab control device comprises two oil cylinders with each composed of the block, piston bar and the piston, block on the lower bearing beam, piston bar connected to the slide base, center of the piston having through hole of the top and down cavity, bottom of the block having ejection pin, whose center having through holes, bottom of the block having the first and second oil outlet with the first connecting with the through hole, the second connecting with the bar free cavity, each oil cylinder composed of a set of single way guide hydraulic single way pump set on the tube of the piston or outside the oil tank, bar cavity controlling circuit composed of hydraulic pipe and change over valve, hydraulic pipe connected between the first oil outlet and the oil tank, change over valve on the path of the hydraulic tube to the guide of the first oil outlet and the oil tank, free from bar cavity control circuit, connecting between second oil outlet and the oil tank to adjust the back pressure and oil suction speed.

Description

technical field [0001] The invention relates to an opening and closing control mechanism of a single-cable grab, in particular to an opening and closing control mechanism which enables the single-cable grab to be opened and closed without impact. Background technique [0002] The single-rope remote control grab is a mechanical device installed on cranes, winches, winches or pulleys for loading and unloading bulk cargo. There are generally two types: (1) cylinder top type; (2) clamp rod type. The cylinder top remote control grab uses the main oil cylinder to withstand the eccentric plates on the left and right sides to lock the grab. The main oil cylinder bears a lot of pressure. If the oil cylinder leaks slightly, the grab will bloom in the air. In addition, when the remote control grab is opened, the opening speed of the grab is too fast, and the material is unloaded in an instant, resulting in a large impact on the grab, which is especially not suitable for loading. The c...

AI Technical Summary

Problems solved by technology

Since the main oil cylinder itself does not have any buffer mechanism, the opening time of the grab bucket is too short, resulting in a large impact. In order to avoid the impact, the hydraulic system is equipped with six large and small buffer oil cylinders. There are many pipe fittings, the installation is complicated and the cost is high; At the same time, the pipe fittings are easily loosened and damaged under the action of shock and vibration, and the reliability performance is reduced

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