Traction mechanism drive, in particular for an internal combustion engine
Traction mechanism drive, in particular for an internal combustion engine, having a wraparound means, having a tensioning device which acts on the wraparound means, having at least one driving wheel and at least one driven wheel, at least one of which is non-circular and/or is mounted eccentrically, wherein the tensioning device is embodied as a latching tensioner ( 7, 21 ) having one part ( 8 ) which is fastened to the engine and one part ( 9 ) which is moveable with respect thereto, said parts being latched to one another, wherein, when the tension of the wraparound means decreases, the moveable part ( 9 ) is moved in the direction of the wraparound means under the action of a spring element, and a movement in the opposite direction is blocked.
1 . Traction mechanism drive, for an internal combustion engine, comprising a wraparound means, a tensioning device which acts on the wraparound means, having at least one driving wheel and at least one driven wheel, at least one of which is non-circular and/or is mounted eccentrically, wherein the tensioning device is embodied as a latching tensioner having one part which is fastened to the engine and one part which is moveable with respect thereto, said parts being latched to one another, wherein, when the tension of the wraparound means decreases, the moveable part is moved in the direction of the wraparound means under the action of a spring element, and a movement in the opposite direction is blocked.
2 . Traction mechanism drive according to claim 1 , wherein one of the wheels, coupled to a unit, is arranged on the moveable part of the latching tensioner.
3 . Traction mechanism drive according to claim 2 , wherein the wheel which is connected to the latching tensioner is arranged on a rotatably or pivotably mounted bracket device and can move with the latter.
4 . Traction mechanism drive according to claim 3 , wherein the bracket device has a first mounting point, by means of which it is rotatably or pivotably mounted on the engine, and a second mounting point, by means of which it is connected to the latching tensioner.
5 . Traction mechanism drive according to claim 1 wherein the moveable part of the latching tensioner comprises catches into which a spring-loaded latching element of the stationary part engages.
6 . Traction mechanism drive according to claim 5 , wherein the stationary part has a blocking device which blocks a movement in the opposite direction.
7 . Traction mechanism drive according to claim 1 wherein the wraparound means is an elastic belt having a high degree of elasticity.