过去在起重机的行走、回转、小车牵引机构中,使用的制动器多为老式电磁铁制动器,这种制动器的缺点是结构复杂,体积大,安装不便,动作不太灵敏,安全可靠性差。而新型电磁制动器可避免上述的缺点,其结构如简图。工作原理是:摩擦片套在转轴上,磁芯、衔铁通过三个螺栓与机体联接。当电机通电时,线包同时接通,电磁铁动作,将衔铁吸合。摩擦片 In the past in the crane walking, slewing, trolley traction mechanism, the use of the brake for the old solenoid brake, the drawback of this brake is complex, bulky, inconvenient installation, the action is not sensitive, poor safety and reliability. The new electromagnetic brake can avoid the above shortcomings, its structure as a simple diagram. Working principle is: friction film sets in the shaft, the core, the armature through the three bolts and body connection. When the motor is energized, the line package connected at the same time, the electromagnet action, the armature pull. Friction plate