Belt tensioner
AssigneeUnitta Company
InventorKazumasa Ayukawa
Life of this patent
Estimating the term…
Abstract
A belt tensioner having a tensioner arm swingably connected to a stationary member about a swing shaft and a belt engaging member for engaging a belt and rotatably arranged at the tensioner arm. A first urging member urgings the tensioner arm rotationaly around the swing shaft so that the belt engaging member tensions the belt. A damping member arranged between the stationary member and the tensioner arm so that friction is produced between the stationary member and the damping member in order to damp a swinging motion of the tensioner arm when the tensioner arm swings. A second urging member urges the damping member toward the stationary member or vice versa in order to produce the friction.
Claims21
A belt tensioner comprising:
- a stationary member;
- a tensioner arm connected to said stationary member via a swing shaft and being swingable about said swing shaft with respect to said stationary member;
- a belt engaging member for engaging a belt and rotatably arranged on said tensioner arm via a rotatable shaft, said belt engaging member being rotated by said belt;
- a coiled spring coiled around said swing shaft, said coiled spring urging said tensioner arm rotationally around said swing shaft so that said belt engaging member tensions said belt;
- a damping member arranged between said stationary member and said tensioner arm so that friction is produced between said stationary member and said damping member in order to damp a swinging motion of said tensioner arm when said tensioner arm swings;
- and
- urging means for urging said damping member toward said stationary member swing shaft in a direction substantially perpendicular to a longitudinal axis of said swing shaft in order to produce said friction.
A belt tensioner comprising:
- a stationary member;
- a tensioner arm connected to said stationary member via a swing shaft and being swingable about said swing shaft with respect to said stationary member;
- a belt engaging member for engaging a belt and rotatably arranged at said tensioner arm via a rotatable shaft, said belt engaging member being rotated by said belt;
- a coiled spring coiled around said swing shaft, said coiled spring urging said tensioner arm rotationally around said swing shaft so that said belt engaging member tensions said belt;
- a damping member arranged between said stationary member and said tensioner arm so that friction is produced between said stationary member and said damping member in order to damp a swinging motion of said tensioner arm when said tensioner arm swings;
- and
- urging means for urging said damping member toward said tensioner arm in a direction substantially perpendicular to a longitudinal axis of said swing shaft in order to produce said friction.
A belt tensioner comprising:
- a stationary member;
- a tensioner arm connected to said stationary member via a swing shaft and being swingable about said swing shaft with respect to said stationary member;
- a pulley for engaging a belt and rotatably arranged at said tensioner arm via a rotatable shaft parallel to said swing shaft;
- a coiled spring coiled around said swing shaft and defining an outer radial circumference, said coiled spring urging said tensioner arm so that said pulley tensions said belt and arranged between said stationary member and said tensioner arm;
- a damping member provided on said tensioner arm and positioned substantially outside of said outer radial circumference, friction being produced between said stationary member and said damping member in order to damp a swinging motion of said tensioner arm when said tensioner arm swings;
- and
- urging means for urging said damping member toward said stationary member in order to produce said friction.
Dependencies are inferred from the claim text.