# US 2021/0083545 A1 · Assembling method of a rotor to an electric motor frame > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2021/0083545 A1 - Document ID: US20210083545A1 - Status: Published application - Kind: A1 - Application number: 16/976,787 - Filed: 2019-02-19 - Published: 2021-03-18 - Earliest claimed: 2018-03-01 - Assignees: Dyson Technology Limited - Applicants: Dyson Technology Limited - Inventors: David IONS; John Declan STOTT; Thomas Richard STAFFORD - Web page: https://patentgrep.com/patent/US20210083545A1 ## CPC - H02K 5/16: Means for supporting bearings, e.g. insulating supports or means for fitting bearings in the bearing-shields (magnetic bearings H02K7/09) - H02K 5/1732: {radially supporting the rotary shaft at both ends of the rotor (H02K5/1737 takes precedence)} - H02K 15/02: of stator or rotor bodies - H02K 1/28: Means for mounting or fastening rotating magnetic parts on to, or to, the rotor structures - H02K 5/161: {radially supporting the rotary shaft at both ends of the rotor (H02K5/165, H02K5/167, H02K5/173 take precedence)} - H02K 15/16: Centring rotors within the stators - H02K: DYNAMO-ELECTRIC MACHINES (dynamo-electric relays H01H53/00; conversion of DC or AC input power into surge output power {H03K3/53}) ## Abstract A method of mounting a rotor assembly to a frame of an electric motor includes providing a rotor assembly having a bearing and a frame having a bearing seat. The method includes locating the bearing within the bearing seat, applying a first adhesive at a substantially hidden interface between the bearing and the bearing seat, applying a second adhesive at a substantially visible interface between the bearing and the bearing seat, and curing the first and second adhesives using different curing processes. ## Claims ### Claim 1 A method of mounting a rotor assembly to a frame of an electric motor, the method comprising providing a rotor assembly having a bearing, providing a frame having a bearing seat, locating the bearing within the bearing seat, applying a first adhesive at a hidden interface between the bearing and the bearing seat, applying a second adhesive at a visible interface between the bearing and the bearing seat, and curing the first and second adhesives using different curing processes. ### Claim 2 (depends on 1) The method of claim 1, wherein the bearing seat comprises an aperture, and applying the first adhesive comprises injecting the first adhesive through the aperture to the hidden interface. ### Claim 3 (depends on 1) The method of claim 1, wherein the method comprises curing the first adhesive subsequent to curing the second adhesive. ### Claim 4 (depends on 1) The method of claim 1, wherein the bearing or the bearing seat comprises a first annular groove, and applying the first adhesive comprises applying the first adhesive in the first annular groove. ### Claim 5 (depends on 1) The method of claim 1, wherein the first adhesive comprises a different adhesive to the second adhesive. ### Claim 6 (depends on 1) The method of claim 1, wherein curing the first adhesive comprises using a heat curing process. ### Claim 7 (depends on 1) The method of claim 1, wherein curing the second adhesive comprises using a UV curing process. ### Claim 8 (depends on 1) The method of claim 1, wherein the bearing comprises a second groove, and the bearing seat comprises a cut-out, at least a portion of the second groove is exposed through the cut-out, and applying the second adhesive comprises applying the second adhesive such that the second adhesive contacts the second groove and at least a portion of the external surface of the bearing seat in the region of the cut-out. ### Claim 9 (depends on 1) The method of claim 1, wherein the method comprises affecting relative movement between the bearing and the bearing seat prior to applying the second adhesive, and subsequent to applying the first adhesive. ### Claim 10 An electric motor comprising a rotor assembly having a bearing, and a frame having a bearing seat for receiving the bearing, wherein the bearing is mounted to the bearing seat by a first adhesive at a hidden interface between the bearing and the bearing seat and by a second adhesive at a visible interface between the bearing and the bearing seat, the first and second adhesives having been cured using different curing processes. ### Claim 11 (depends on 10) The electric motor of claim 10, wherein the bearing seat comprises an aperture through which the first adhesive is injected. ### Claim 12 (depends on 10) The electric motor of claim 10, wherein the bearing an internal surface of the bearing seat comprises a first annular groove, the first annular groove defines at least a portion of the hidden interface, and the first adhesive is located in the first annular groove. ### Claim 13 (depends on 10) The electric motor of claim 10, wherein the bearing seat comprises a cut-out, at least a portion of the bearing is visible through the cut-out, and the cut-out defines the visible interface between the bearing and the bearing seat. ### Claim 14 (depends on 13) The electric motor of claim 13, wherein the bearing comprises a second groove, at least a portion of the second groove is exposed through the cut-out, and the second adhesive is located in the second groove. ### Claim 15 (depends on 10) The electric motor of claim 10, wherein the first adhesive comprises a different adhesive to the second adhesive. ### Claim 16 (depends on 10) The electric motor of claim 10, wherein the second adhesive comprises an adhesive having a shorter cure time than that of the first adhesive. ### Claim 17 (depends on 10) The electric motor of claim 10, wherein the first adhesive comprises a heat cured adhesive. ### Claim 18 (depends on 10) The electric motor of claim 10, wherein the second adhesive comprises a UV cured adhesive.