Automatic tensioning device for rotation transmission belt

摘要

The tensioning device for belts (2) from a drive shaft (3) to a driven shaft (5) has a transmission device with three belt discs. A body (21) to support the third disc (17) is on a fixed structure (12). A springing device (22) on the body exerts a pre-tension on the third disc to tension the belt. The pre-tension is in a specific plane (D). The belts are symmetrical to the pre-tension plane, which is also the plane of symmetry of the supporting body. The springing device, which has its own pre-tensioner, may be a leaf spring. The support body consists of two plates fixed to each other extending parallel to the plane (D).