FLUID COUPLING WITH A SAFETY PIN

摘要

A fluid coupling with a safety pin is provided to employ a safety pin having a simple structure so that the safety pin is easily mounted on the fluid coupling. A housing(30) has through holes(35) at one side of an outer peripheral surface. The through holes(35) are formed on an oil chamber(31). A plug(40) is coupled to the oil chamber(31) while maintaining the tightness of the through holes(35), such that while the bottom surface of the plug(40) faces the oil chamber(31). The plug(40) has a concave groove(41). A safety pin(45) has one end portion fixed by a lead alloy and a front end portion protruding to the outside of the housing(30). A sensor(60) is positioned at the outside of the housing(30) so as to be close to the front end portion of the safety pin(45). The safety pin(45) makes touch with the sensor if the lead alloy is melted by the temperature of the oil. The sensor(60) detects the touch of the safety pin(45) to control a driving shaft.