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US 12,338,894 B2Granted
Tensioner with dual damping system for a belt drive
AssigneeMuviq S.R.L.
InventorsEdevon Costa, Eduardo Souza, Luca D'Amicantonio, Antonio Gasper Junior
Life of this patent
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Abstract
A tensioner for a belt has a fixed part provided with a pivot defining an axis (A), an eccentric arm rotatably mounted on the pivot about the axis (A), a pulley rotatable about an axis (B) defined by the arm and configured to cooperate with a timing belt, a first spring-damper assembly interposed between the arm and the fixed part, and a second spring-damper assembly configured to act between the arm and the fixed part from a predetermined angle of rotation of the arm with respect to the fixed part.
Claims10
A tensioner comprising:
- a fixed part provided with a pivot tube defining an axis (A),
- an eccentric arm rotatably mounted on the pivot tube about the axis (A),
- a pulley rotatable about an axis (B) defined by the arm and configured to cooperate with a timing belt,
- a first spring-damper assembly interposed between the arm and the fixed part, and
- a second spring-damper assembly configured to act between the arm and the fixed part from a predetermined angle of rotation of the arm with respect to the fixed part, wherein the second spring-damper assembly comprises:
- a bushing rotatably mounted on the pivot tube about the axis (A),
- a spring coaxial to the pivot tube having a first end constrained to the fixed part and a second end constrained to the bushing, the spring acting torsionally between the fixed part and the bushing,
- wherein the arm and the bushing are connected to each other with angular clearance.
5 more elements
A tensioner comprising:
- a fixed part having a base with a pivot tube defining a first axis (A) and a tubular casing coaxial to the pivot tube,
- an eccentric arm rotatably mounted on the pivot tube and defining a second axis (B),
- a pulley rotatable about the second axis (B) and configured to cooperate with a timing belt,
- a first spring-damper assembly interposed between the eccentric arm and the fixed part, and
- a second spring-damper assembly configured to act between the eccentric arm and the fixed part from a predetermined angle of rotation of the arm with respect to the fixed part, the second spring-damper assembly comprising:
- a bushing rotatably mounted on the pivot tube about the first axis (A),
- a helical spring mounted with radial interference inside the tubular casing of the fixed part, the spring acting torsionally between the fixed part and the bushing,
- wherein the bushing has a conical outer surface suitable for interacting with the spring.
5 more elements
A tensioner comprising:
- a fixed part provided with a pivot tube defining an axis (A),
- an eccentric arm rotatably mounted on the pivot tube about the axis (A),
- a pulley rotatable about an axis (B) defined by the arm and configured to cooperate with a timing belt,
- a first spring-damper assembly interposed between the arm and the fixed part, and
- a second spring-damper assembly configured to act between the arm and the fixed part from a predetermined angle of rotation of the arm with respect to the fixed part, wherein the second spring-damper assembly comprises:
- a bushing rotatably mounted on the pivot tube about the axis (A),
- a spring coaxial to the pivot tube having a first end constrained to the fixed part and a second end constrained to the bushing, the spring acting torsionally between the fixed part and the bushing,
- wherein the arm and the bushing are connected to each other with angular clearance,
- wherein the connection with angular clearance between the bushing and the arm is defined by at least one projection extending from one between the bushing and the arm and engaging with lost motion a circumferential seat obtained in another between the bushing and the arm.
6 more elements
Dependencies are inferred from the claim text.