Pulley tensioner for a belt drive for use in contact with oil
AssigneeDayco Europe S.R.L.
InventorsAdriano Rolando, Gianluca Pane
Life of this patent
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Abstract
A tensioner for a belt drive comprises a pivot defining an axis, a support hinged to the axis and defining a guiding surface preferably having a circular profile, an elastic element for actuating the support and a crown pulley eccentric with respect to the axis and surrounding the guiding surface. The tensioner further comprises a journal bearing to support the pulley on the guiding surface.
Claims19
A tensioner for a belt drive comprising a pivot defining an axis (A), a support hinged to said axis (A) and defining a guiding surface having a circular profile, an elastic element for actuating said support and a crown pulley mounted on said support about said guiding surface and rotatable about a second axis (B) eccentric with respect to said axis (A), and a journal bearing to support said pulley on said guiding surface wherein said journal bearing comprises a first conduit transversal to said axis (A) and defining an outlet for feeding oil onto said guiding surface, and said guiding surface is axially delimited by first and second shoulders and defines an axially symmetric recess fluidly connected to said first conduit to exert a symmetric action on said pulley.
A tensioner for a belt drive comprising:
- a pivot defining an axis (A),
- a support hinged to said axis (A) and having a guiding surface with a circular profile,
- an elastic element for actuating said support,
- a crown pulley mounted on said support about said guiding surface and rotatable about a second axis (B) eccentric with respect to said axis (A),
- a journal bearing to support said pulley on said guiding surface and adapted to be fed by a flow rate of pressurised fluid with the fluid flow for the journal bearing passing through interconnected conduits defining a specific path through the pivot and through said support, and
- a seal radially positioned between the pivot and the support to avoid oil leaks in an axial flow direction.
A tensioner for a belt drive comprising a pivot defining an axis (A), a support hinged to said axis (A) and defining a guiding surface having a circular profile, an elastic element for actuating said support and a crown pulley mounted on said support about said guiding surface and rotatable about a second axis (B) eccentric with respect to said axis (A), and a journal bearing to support said pulley on said guiding surface, said journal bearing comprising a first conduit positioned transverse to said axis (A) and defining an outlet for feeding oil onto said guiding surface, and said first conduit precedes the resultant of the action of said belt on said pulley by an angle comprised between 60° and 130°.
Dependencies are inferred from the claim text.