Lifting cap limiter working principle

  Rising limit position limiter gantry crane of important safety device. When hoisting motion, the spreader in working height range. At the maximum working position, the spreader with the top of the supporting mechanism (such as a frame or a small crane,steel crane etc.) should have a certain distance.
       The specific size of this pitch, gantry crane drivers difficult to master at work, coupled with inevitable negligence in work. Therefore, if no increase in the limit position limiter installed or malfunctioning limiter, crane work, the spreader may occur to the upper support structure top and rising operation of the drive system can still continue pulling the spreader,overhead gantry crane which causes wire breakage, and the spreader falling accidents.
       Gantry crane used limiter caps and maintain its effective work to prevent similar incidents from happening, so "crane safety regulations" in the states: all power-driven crane, its lifting mechanism (including main and auxiliary hoisting mechanism) , should be installed up limit position limiter.
       Gantry crane rising limit position limiter basic principle is the separation of a drive by the lifting motion action to trigger an electrical switch, resulting in increased transmission system to stop working, which play a protective role.hoist gantry crane The common form of hammer and screw.