Tensioning device

摘要

A tensioning device (1) to impart tension to a chain or belt comprising a tensioner arm (2), a supporting member, a pivot, and a biasing element (4). The tensioner arm (2) has a proximal end (21) with a curved engaged surface (25) formed on a lower surface thereof, a distal end (22) opposite the proximal end (21), and an arcuately curved chain sliding surface (2a) extending between the proximal end (21) and the distal end (22). The supporting member has an engaging surface (32a,32a') for slidably contacting the engaged surface (25) of the proximal end (21) of the tensioner arm (2), such that the force exerted by a chain passing over the chain sliding surface (2a) is transmitted from the engaged surface (25) to the engaging surface (32a,32a'). The pivot couples the tensioner arm (2) to the supporting member. The biasing element (4) is between the supporting member and imparts a resilient force on the distal end (22) of the tensioner arm (2).