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本发明用激光光束动态显示:当吊钩偏角0°时,发铅垂方位显示紫色的激光光束;当吊钩产生偏角时,蓝色激光光束则偏离始终铅垂方位红色的基准激光光束,红、蓝分明显示出偏角的方向、大小。其设计是:将经球绞连接的基准激光发生器设计装设于与吊钩联接的动滑轮组护板外侧的下方,将吊钩偏角激光发生器装设于动滑轮组护板外侧的上方。基准激光发生器由于经球绞连接,在激光发生器自重和球绞
The present invention uses a laser beam dynamic display: when the hook off angle of 0 °, the vertical direction of the display purple laser beam; when the hook off angle, the blue laser beam is always red vertical reference red laser beam , Red and blue clearly show the direction of declination, size. The design is that the ball screwed reference laser generator is designed to be arranged under the outer side of the movable pulley block guard plate connected with the hook, and the hook offset laser generator is arranged above the outer side of the movable pulley block guard plate. The reference laser generator due to ball screw connection, self-weight in the laser generator and ball screw