The subject innovation is used to reduce friction wear and heat generation of the bearing, as a technique related to selectively passing and blocking air coupling for industrial machinery (air clutch) a driving force of the prime mover, blocking the load on the bearing from the air clutch life Since the extension relates to bearing the load shedding unit for the air clutch to be used for a high speed to increase the economical efficiency and productivity, while an air clutch.
This main configuration in accordance with an embodiment of the subject innovation is formed a spline gear on the outer periphery, a hub coupled to a coaxial circle with the rotation; Cylindrical ring that is coupled to the bearing enables rotation to the outer periphery of the hub and; Piston rings that are fitted to the inner periphery of the coupling ring and the cylinder; Was extrapolated to the splined gear of the hub, is coupled to the piston ring enables rotation in bearings, subject to the elastic pressure of the spring while the tooth-tooth ring is formed on one side and; Tooth shell coupled to enable rotation by a bearing in the outer periphery of the hub is, a tooth formed on one side so that the engagement with the tooth formed on the toothed ring; The toothed ring and the tooth is coupled to the outer periphery of the hub is arranged between the shell spring bracket for supporting the spring; including, wherein the piston ring is supported so as to restrict the operation of the piston rings on the inner side surface of the cylinder ring coupled inserted the characterized in that the fixed installation.