Method of using a tolerance ring

{
  "publication_number": "US10941813B2",
  "country": "US",
  "kind": "B2",
  "title": "Method of using a tolerance ring",
  "abstract": "A tolerance ring has a hollow band with outwardly extending corrugated protrusions forming waves that engage an inner surface of a bore of a housing. At one end of the tolerance ring is an inwardly flared guide surface extending axially and radially from the band. The guide surface acts as a tapered entrance to assist the insertion of a shaft into the hollow band during assembly of the ring into the bore of the housing.",
  "claims": [
    "1. A method of using a tolerance ring, the method comprising: providing a tolerance ring of a resilient material comprising a first axial end and a second axial end, a body having a hollow cylindrical shape, a plurality of corrugated protrusions extending radially outward from the body away from a central longitudinal axis of the hollow cylindrical shape such that there are no protrusions that extend radially inward from the body, and a tapered guide portion extending axially from at least one segment of an inner circumference of the body having a guide surface coincident and contiguous with the body at a minimum guide diameter and extending to a maximum guide diameter at a free end of the guide portion forming the first axial end of the tolerance ring, wherein at least a portion of the body having no radial protrusions is disposed axially between the guide portion and the plurality of radially outwardly extending protrusions; inserting the tolerance ring axially into a bore of a housing such that the plurality of radially outwardly extending protrusions contact an interior surface of the bore; and inserting a shaft into the guide portion and through the body of the tolerance ring after inserting the tolerance ring, whereby creating a radial spring force between the shaft and the interior surface of the bore and creating an interference fit between the tolerance ring and the shaft.",
    "2. The method of claim 1, wherein prior to inserting the shaft into the body of the tolerance ring there is an initial misalignment between the shaft and the central longitudinal axis of the body, and the guide surface axially aligns the shaft with the body.",
    "3. The method of claim 1, wherein inserting the tolerance ring into the bore is performed such that no part of the tolerance ring protrudes out of the housing.",
    "4. The method of claim 1, wherein the guide extends from an entire circumference of the body.",
    "5. The method of claim 1, wherein the plurality of protrusions includes all protrusions extending from the body, and wherein all protrusions of the plurality of protrusions lie along a same circumferential row.",
    "6. The method of claim 1, wherein an angle of inclination of the guide surface relative to the axis is constant along a length of the guide surface.",
    "7. The method of claim 1, wherein the bore of the housing comprises a mouth having a chamfer.",
    "8. The method of claim 1, wherein, viewed in cross section, the bore has a straight sidewall.",
    "9. The method of claim 1, wherein the step of inserting the tolerance ring into the bore is performed such that the plurality of protrusions does not abrade against any surface."
  ],
  "description_excerpt": "This invention relates to tolerance ring assemblies, wherein a tolerance ring provides an interference fit between parts of an assembly, where a first part has a cylindrical portion located in a cylindrical bore of a second part. The invention particularly relates to assemblies having a tolerance ring that provides an interference fit between a cylindrical component such as a shaft or a bearing and a housing for the shaft.\n\nImproved engineering techniques have resulted in the need for greater accuracy of machine parts, raising manufacturing costs. Very close tolerances are required where press fits, splines, pins or keyways are employed to transmit torque in applications such as pulleys, flywheels or driveshafts.\n\nTolerance rings may be used to provide an interference fit between parts required to transmit torque. Tolerance rings provide a low cost means of providing an interference fit between parts that may not be machined to exact dimensions. Tolerance rings have a number of other potential advantages, such as compensating for different linear coefficients of expansion between the parts, allowing rapid apparatus assembly, and durability.\n\nA tolerance ring generally comprises a strip of resilient material, for example a metal such as spring steel, the ends of which are brought together to form a ring. A band of protrusions extend radially outwards from the ring, or radially inwards towards the centre of the ring. Usually, the protrusions are formations, possibly regular formations, such as corrugations, ridges or waves.",
  "cpc": [
    "F16D 1/0835",
    "F16B 2/241",
    "F16C 2370/12",
    "F16C 27/00",
    "F16C 35/02",
    "F16C 35/07",
    "F16C 35/073",
    "F16C 35/077",
    "F16C 43/00",
    "F16D 2001/062",
    "G11B 25/043",
    "G11B 33/12",
    "G11B 33/123",
    "G11B 5/4806",
    "G11B 5/4813",
    "Y10T 29/49696",
    "Y10T 29/49945",
    "Y10T 403/452",
    "Y10T 403/453",
    "Y10T 403/7047",
    "Y10T 403/7049",
    "Y10T 403/7058",
    "Y10T 403/7061"
  ],
  "ipc": [
    "F16C 27/00",
    "F16C 35/02",
    "F16C 35/07",
    "F16C 35/073",
    "F16C 35/077",
    "F16C 43/00",
    "F16D 1/06",
    "F16D 1/08",
    "G11B 25/04",
    "G11B 33/12",
    "G11B 5/48"
  ],
  "assignees": [
    "Saint Gobain Performance Plastics Rencol Ltd"
  ],
  "inventors": [
    "Niki S. Woodhead",
    "Andrew Robert Slayne"
  ],
  "filing_date": "2018-12-28",
  "publication_date": "2021-03-09",
  "grant_date": "2021-03-09",
  "priority_date": "2003-04-17",
  "application_number": "US-201816235199-A",
  "family_id": "9956991",
  "cited_by_count": 0,
  "citations": [
    "US1931073A",
    "US2992868A",
    "US3104136A",
    "US3151330A",
    "US3586402A",
    "US4269550A",
    "US4376254A",
    "US4790683A",
    "US5413374A",
    "US6480363B1",
    "US6935005B2"
  ]
}