Tensioner
A tensioner comprising a base having a cylindrical portion extending axially, the cylindrical portion comprising a radially outer surface and a receiving portion that is radially inward of the radially outer surface, an eccentric arm pivotally engaged with the radially outer surface, a torsion spring disposed within the radially inward receiving portion, the torsion spring applying a biasing force to the eccentric arm, and a pulley journalled to the eccentric arm.
1. A tensioner comprising:
a base having a cylindrical portion extending axially, the cylindrical portion comprising a radially outer surface and a radially inward receiving portion, a retainer engaged with the base whereby the base can be rotated by the retainer;
an eccentric pivot engaging the base receiving portion, the eccentric pivot rotatable about a fastener;
an eccentric arm pivotally engaged with the radially outer surface;
a torsion spring disposed within the radially inward receiving portion, the torsion spring applying a biasing force to the eccentric arm; and
a bearing journalled to the eccentric arm.
2. The tensioner as in claim 1 , wherein the pulley is journalled with a bearing.
3. The tensioner as in claim 1 , wherein the retainer and eccentric arm each comprise a cooperating alignment mark for use during assembly.
4. The tensioner as in claim 3 , wherein the eccentric pivot and the base each comprise a cooperating alignment mark for use during installation.
5. The tensioner as in claim 1 , wherein:
the eccentric arm pivots about a first axis;
the eccentric pivot and base pivot about a second axis;
the first axis is not collinear with the second axis; and
the first axis is parallel to the second axis.