Detecting, monitoring device of the hook angle and its crane

摘要

The present invention provides a detecting and monitoring device of the hook angle and its crane; a preferred embodiment thereof is to lengthen the two side-fenders of a movable pulley of the crane raising pulley assembly by equal amounts so that a platform can be fixed on the vacant space between the inner sides of the lengthened fenders. The platform is installed in such a way that the platform surface is a horizontal plane when the hook deviation angle is 0 degree. An angle measuring instrument is disposed on the platform surface and used to detect hook angle in real-time. The hook angle is shown in crane operator's cab by a wireless transmitter to control the crane, eliminate the hook angle deviation, and provide the basis of the vertical lifting. The embodiment can be applied to stand-alone lifting, double machine hoisting, or main and auxiliary machine hoisting. The device can be suitably installed on mobile cranes.

主权项

1. A hook angle detecting device for detecting the hook angle of a crane, comprising:
at least one angle measuring instrument; a part installed in series between the movable pulley of the crane's raising pulley assembly and the crane hook or between the fixed pulley and the mounting point of the raising pulley assembly, said part meets the requirement that a platform surface is a horizontal plane when the hook deviation angle is 0 degree and that, under different deviation angles of the hook, the action line of the lifting force of the pulley assembly which passes through the hook is still perpendicular to the platform surface; and a platform surface fixedly installed on said part, said platform surface meets the requirement that when the hook deviation angle is 0 degree, said platform surface is a horizontal plane; said at least one angle measuring instrument is installed on said platform surface for detecting the inclination angle between said platform surface and the horizontal plane.