Pulley assembly
AssigneeAktiebolaget Skf
InventorsStefano Urso, Ralf Peters, Rosario Pedulla
Life of this patent
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Abstract
A pulley assembly for belt tensioners having a bearing unit provided with a rotating outer ring and made of metal, an outer wheel body overmoulded onto the outer ring to rotate with the outer ring and interact with a belt, a gripping surface at the interface between the outer wheel body and the outer ring to prevent circumferential slipping between the outer wheel body and the outer ring; and an axial retainer integral with the outer ring and having two lateral edge members located axially on opposite sides of the gripping surface to engage the outer wheel body and prevent axial movement of the outer wheel body relative to the outer ring.
Claims11
A pulley assembly for belt tensioners, comprising:
- a bearing unit provided with a fixed inner ring and a rotating outer ring coaxial with the inner ring and made of metal;
- an outer wheel body overmoulded onto the bearing unit and comprising two lateral annular edges on opposite axial ends of the outer wheel body, wherein the outer wheel body rotates with the rotating outer ring and is configured to guide a belt, and wherein the two lateral annular edges define a radial seat between them;
- a gripping surface at an interface between the outer wheel body and the outer ring of the bearing unit to prevent at least circumferential slipping between the outer wheel body and the outer ring;
- and
- an axial retainer formed as a single piece together with the outer ring and arranged axially on respective opposite sides of the gripping surface to engage the outer wheel body.
A pulley assembly for belt tensioners, comprising:
- a bearing unit comprising a fixed inner ring and a rotating outer ring coaxial with the inner ring, the bearing unit being made of metal;
- an outer wheel body overmoulded onto the bearing unit and comprising:
- two lateral annular edges on opposite axial ends of the outer wheel body, wherein the two lateral annular edges define a radial seat between them;
- a plurality of radially extending V-shaped teeth and a plurality of V-shaped recesses alternating axial with the plurality of V-shaped teeth,
- wherein the plurality of radially extending V-shaped teeth and the plurality of V-shaped recess are housed axially between the two lateral annular edges and within the radial seat;
- wherein the outer wheel body rotates with the rotating outer ring and is configured to guide a belt;
- a gripping surface at an interface between the outer wheel body and the outer ring of the bearing unit configured to prevent circumferential slipping between the outer wheel body and the outer ring;
- and
- an axial retainer formed as a single piece together with the outer ring and arranged on respective opposite axial sides of the gripping surface to engage the outer wheel body.
Dependencies are inferred from the claim text.