Patent ID: 9074657
Filing Date: 2015-07-07
Classification: F16H

Abstract:
1. A tensioning system with restoring action for tensioning a flexible drive means, in particular a drive chain of an internal combustion engine, comprising a tensioning apparatus and a restoring device; the tensioning apparatus comprising a housing, a tensioning piston which is guided in a movable manner in tensioning direction in the housing and which has a detent profiling, and a detent hook for the stepped adjustment of the working range of the tensioning piston, wherein the detent hook has a clamping region for engaging into the detent profiling at the tensioning piston, and wherein a retraction stop is provided at the housing in such a manner that in an abutting state of the detent hook, a further retraction movement of the tensioning piston into the housing is prevented by virtue of the clamping region being clamped on the detent profiling, wherein a restoring receptacle is formed at the housing of the tensioning apparatus and the restoring device has a restoring element for coupling to the tensioning apparatus, wherein the restoring element positioned in the restoring receptacle between the restoring receptacle and the detent hook prevents the abutting state of the detent hook at the retraction stop and wherein the restoring element facilitates automatically spreading open the clamping region and restoring the tensioning piston upon the detent hook being in the abutting state at the restoring element and a further retraction movement of the tensioning piston into the housing.