Patent ID: 6083131
Filing Date: 2000-07-04
Classification: F16H

Abstract:
A hydraulic autotensioner for keeping constant the tension in a belt, comprising a bolt to be threadedly fixed to a stationary member, an eccentric ring supported by said bolt at an off-center position so as to be pivotable about said bolt, a pulley rotatable mounted on said eccentric ring, a tension adjusting spring for biasing said eccentric ring in such a direction that the belt is pressed by said pulley, a hydraulic damper having a damper body and mounted to be disposed between the stationary member and said eccentric ring so as to abut said eccentric ring for damping the pushing force applied to said eccentric ring from the belt through said pulley, and a coupling means for keeping said eccentric ring and said hydraulic damper coupled together, wherein said hydraulic damper is fully disposed inside of an outer periphery of said pulley, and wherein said coupling means comprises a hole formed in said eccentric ring, a pin provided on said damper body of said hydraulic damper and inserted in said hole, and a flanged cap member press-fitted on a tip of said pin, said flanged cap member having a longitudinal part extending longitudinally of said pin and a flange extending radially outwardly from said longitudinal part, wherein said eccentric ring is held between said flange of said flanged cap member and said damper body of said hydraulic damper so as to maintain said eccentric ring and said hydraulic damper coupled together.