| 摘要 |
A tensioning device, in particular for a highly dynamic endless drive, such as a chain drive or a belt drive for an internal combustion engine, comprises a tensioner housing, a tensioning piston displaceably arranged in the tensioner housing, a pressure chamber formed between the tensioner housing and the tensioning piston and a pressure medium inlet leading into the pressure chamber and including a non-return valve. In order to meet also new demands, in the case of which oil pumps with having a low feed pressure are used, the present device discloses that a valve body of the non-return valve is defined by a leaf spring diaphragm. The device additionally relates to a non-return valve as well as an endless drive. |
| 主权项 |
1. A tensioning device, for a highly dynamic endless drive, or a chain drive or a belt drive for an internal combustion engine, comprising:
a tensioner housing, a tensioning piston displaceably arranged in the tensioner housing, a pressure chamber formed between the tensioner housing and the tensioning piston and a pressure medium inlet leading into the pressure chamber and including a non-return valve, a valve body of the non-return valve being defined by a spring diaphragm, wherein the spring diaphragm comprises a holding area, which is arranged such that it is at least secured against rotation preferably relative to the tensioner housing, and two elastically arranged closure areas extending away from said holding area in opposite directions and covering each a respective inlet opening in the closed condition, wherein a reception bore with a concave inner surface is provided, the inlet openings terminate at the concave inner surface, and the closure areas of the spring diaphragm have a curved shape, which is adapted to the reception bore, and abut on the concave inner surface of the reception bore in the closed condition, and a substantially central stop means is provided, which limits the opening stroke of the closure areas in common. |
