Tightener for chains, esp. control chains of IC engines

摘要

A slide rail (10) is pressed against the chain. The cylinder housing (20) integrated with the slide rail contains a mechanical spring system and a piston-type compression member (24). The slide rail is swivel mounted in a swivel bearing (18). The cylinder housing has a cylinder chamber (32) containing a pressure oil pad as extra hydraulic spring system for the pressure member. A pipe (34) leading from the swivel bearing and opening into the cylinder chamber supplies oil to the pressure oil pad. The pressure oil pad has a spring-loaded excess pressure valve (36) comprising locking member and spring enclosed by a bushing (38).