The manufacturer has implemented recall measures for the ejector rod of the brake arm of a certain series of elevators,replacing the ejector rod bolt with a segmented ejector rod.During the inspection,it was found that several cases of segmented ejector rods were tilted.This article describes the function and failure hazards of the ejector rod of the brake arm.Through force analysis and case representation analysis,the cause of the fault is deduced.The author believes that the segmented ejector rod will inevitably be tilted,the segmented ejector rod and the broken ejector rod bolt are not essentially different in the working process,but aggravate the degree of hidden dangers and increase the maintenance cost,so the recall measures have not achieved the desired effect.Finally,some suggestions for improvement are put forward on the ejector rod of the brake arm.
Brake arm ejector rodFailure hazardsForce analysisTilted segmented ejector rod
NETL
NSTL
万方数据
