Patent ID: 9080643
Filing Date: 2015-07-14
Classification: F16H

Abstract:
1. A tensioning device for a flexible drive device, such as a chain or belt, comprising: a housing, a tensioning piston that is arranged in a sliding manner in the housing, a pressure reservoir for hydraulic fluid that is formed between the housing and the tensioning piston, a fluid supply that is arranged in the housing to supply the pressure reservoir with hydraulic fluid, a supply insert that is seated in the housing to prevent movement of the supply insert with respect to the housing, the supply insert forming a damping device that is arranged in the housing and has a physical fluid connection to the pressure reservoir and damps the retracting motion of the tensioning piston, and a venting device that is arranged on the tension piston and has a physical fluid connection to the pressure reservoir, wherein the damping device has at least one damping channel that is open in both flow directions as a component of the fluid supply in such a way that during operation, at least a portion of the supply stream is fed through the at least one damping channel into the pressure reservoir, and wherein the pressure reservoir is located between the damping device and the venting device, the damping device and the venting device being coupled to each other by the pressure reservoir such that a drainage flow from the pressure reservoir occurs via the damping device and the venting device in combination.