TRIBOSYSTEM FOR A MECHANICAL TENSIONING SYSTEM IN AN OILY ENVIRONMENT

摘要

The invention relates to a mechanical tensioning system (1) according to an eccentric principle for a power transmission belt, in particular a belt of a power transmission drive in an internal combustion engine.  The tensioning system (1) comprises a cylindrical support element (8) with integrated longitudinal hole (9) for a screw (10) for detachable mounting to a fixed machine part, wherein the support element (8) is surrounded by an eccentric bushing (7) which is rotatably mounted via a slide bearing (21) and which supports a roller bearing (4) with associated washer disk (2).  To apply a spreader force, between the support element (8) and the eccentric bushing (7) there is a torsion spring (22) which applies a torsional torque to the eccentric bushing (7), so that the washer disk (2) is braced against the power transmission belt.  The tensioning system (1) for use in an oily environment comprises a specially designed slide bearing (21) enclosing a longitudinal slot (24), which cooperates with a support element (8) having a wear-resistant surface (19), wherein a defined bearing play is left between the slide bearing (21) and the support element (8).