Idler or roller device
AssigneeAktiebolaget Skf
InventorsTorbjorn Hedman, Nicolas Tronquoy
Life of this patent
Estimating the term…
Abstract
A tension roller or reel device for a torque transmission element. The device comprises at least one bearing having one inner race, one outer race and at least one row of rolling elements between the inner race and the outer race, a pulley on top of the outer race, and a retaining screw inserted into a central bore of the inner race. The bore of the inner race is provided with a circumferential cavity in which an elastic ring is fitted non-securely and integrally, the cavity having an axial length strictly greater than the axial dimension of the elastic ring.
Claims11
A tension roller or reel device for a torque transmission element comprising:
- at least one bearing having one inner race, one outer race and at least one row of rolling elements between the inner race and the outer race,
- a pulley on top of the outer race, and
- a retaining screw inserted into a central bore of the inner race,
- wherein the bore of the inner race includes a circumferential cavity, and an elastic ring in the circumferential cavity, the elastic ring being retained in the circumferential cavity by a friction fit and being configured to roll axially or slide axially or to both roll axially and slide axially in the circumferential cavity, the cavity having an axial length greater than the axial dimension of the elastic ring, wherein
- the elastic ring has a radial dimension greater than the depth of the cavity such that the ring extends radially beyond the bore, and wherein
- the screw body fitted in the bore radially compresses the elastic ring and retention is assured by radial tightening.
An internal combustion engine comprising:
- at least one tension roller or reel device comprising:
- at least one bearing having one inner race, one outer race and at least one row of rolling elements between the inner race and the outer race,
- a pulley on top of the outer race, and
- a retaining screw inserted into a central bore of the inner race,
- wherein the bore of the inner race includes a circumferential cavity in which an elastic ring is fitted non-securely and integrally, the cavity having an axial length strictly greater than the axial dimension of the elastic ring,
- wherein the at least one tension roller or reel device is integrated into to a torque transmission element of an engine, wherein
- the elastic ring has a radial dimension greater than the depth of the cavity such that the ring extends radially beyond the bore, and wherein
- the screw body fitted in the bore radially compresses the elastic ring and retention is assured by radial tightening.
A tension roller or reel device for a torque transmission element comprising:
- at least one bearing having one inner race, one outer race and at least one row of rolling elements between the inner race and the outer race,
- a pulley on top of the outer race, and
- a retaining screw inserted into a central bore of the inner race,
- wherein the bore of the inner race includes a circumferential cavity and means for retaining the retaining screw, the cavity having an axial length greater than an axial dimension of the means for retaining the retaining screw, wherein
- the elastic ring has a radial dimension greater than the depth of the cavity such that the ring extends radially beyond the bore, and wherein
- the screw body fitted in the bore radially compresses the elastic ring and retention is assured by radial tightening.
Dependencies are inferred from the claim text.