| 摘要 |
<p>1. A mechanical device for tensioning a transmission chain or belt, comprising a ramp (17) constituted by at least one curved spring strip (18) having a sliding surface (19) and resiliently applied against said chain or belt (26) and provided with anti-return means for preventing the withdrawal of the ramp (17), comprising a rectilinear rigid support (1) having a first end constituting a guide element (6) while its other end (5) has stop means (7), said curved strip (18) having one end engaged with the stop means (7), characterised in that the anti-return means are associated with the opposite end (21) of the strip (18) and are constituted by a carriage (8) slidably mounted on the guide element (6) and tiltable relative to the latter, said carriage (8) being formed by a plate bent in the shape of a U and including in its intermediate part (10) an opening (15) for receiving the guide element (6) and lateral ears (11) which are parallel and project from the edges of its wings (9), these ears (11) each defining a shoulder (13) on the same side of the plate and the ends (16) of the wings (9) being inwardly curved.</p> |
