# US 2014/0197705 A1 · Rotary electric machine > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2014/0197705 A1 - Document ID: US20140197705A1 - Status: Published application - Kind: A1 - Application number: 13/886,995 - Filed: 2013-05-03 - Published: 2014-07-17 - Earliest claimed: 2013-01-17 - Assignees: Mitsubishi Electric Corporation - Applicants: Mitsubishi Electric Corporation - Inventors: Soichi SATO; Yoshihiko ONISHI; Katsunari TAKAGI; Keisuke SHIMOMURA; Manabu YOSHINORI - Web page: https://patentgrep.com/patent/US20140197705A1 ## CPC - H02K 1/185: {to outer stators} - H02K 5/04: Casings or enclosures characterised by the shape, form or construction thereof - H02K: DYNAMO-ELECTRIC MACHINES (dynamo-electric relays H01H53/00; conversion of DC or AC input power into surge output power {H03K3/53}) ## Abstract In the rotary electric machine, a cylinder 04a of a ring component 04 is formed in such a way that a fitting outer surface 04c1 of the cylinder 04a of the ring component 04 is fitted to a fitting inner surface 02a of a first housing 02; a clearance value between the fitting outer surface of the cylinder and a fitting inner surface of the first housing is lower than a clearance value between an outer surface, in which the fitting outer surface is excepted, of the cylinder and an inner surface, in which the fitting inner surface is excepted, of the first housing; and a position in a diameter direction of a stator core 3 facing to the first housing is set by above-described fitting process. ## Claims ### Claim 1 A rotary electric machine comprising: a stator core that is formed in an annular shape; a rotor that is supported in a freely rotational state, and is inserted to inner space of the stator core; a first housing that houses the stator core and the rotor; a second housing that is provided so as to face toward one end portion in an axis direction of the first housing; and a ring component that is mounted on an outer surface of the stator core; wherein the ring component includes a cylinder surrounding the outer surface of the stator core, and a flange provided on one end portion in an axis direction of the cylinder; the cylinder of the ring component is formed in such a way that a fitting outer surface, which is provided at a side corresponding to the one end portion of the axis direction, is fitted to a fitting inner surface, which is provided at a side corresponding to one end portion of the axis direction of the first housing; a clearance value between the fitting outer surface of the cylinder and the fitting inner surface of the first housing is lower than a clearance value between an outer surface, in which the fitting outer surface is excepted, of the cylinder and an inner surface, in which the fitting inner surface is excepted, of the first housing; and a position in a diameter direction of the stator core facing to the first housing is set by fitting the fitting outer surface of the cylinder to the fitting inner surface of the first housing. ### Claim 2 (depends on 1) A rotary electric machine according to claim 1, wherein the fitting outer surface on the cylinder of the ring component is composed of an outer surface of an annular step formed on an outer surface of the cylinder. ### Claim 3 (depends on 1) A rotary electric machine according to claim 1, wherein an elastic component, which is provided between an outer surface corresponding to the other end portion in the axis direction of the cylinder and an inner surface corresponding to the other end portion in the axis direction of the first housing, is included. ### Claim 4 (depends on 3) A rotary electric machine according to claim 3, wherein the elastic component is disposed in a groove formed on an inner surface corresponding to the other end portion in the axis direction of the first housing. ### Claim 5 (depends on 1) A rotary electric machine according to claim 1, wherein the second housing includes a fitting protrusion formed on a wall surface facing to the first housing, and the fitting inner surface of the cylinder is fitted to an outer surface of the fitting protrusion of the second housing. ### Claim 6 (depends on 1) A rotary electric machine according to claim 1, wherein a thickness in a radial direction of a portion corresponding to the fitting inner surface of the first housing is larger than at least a thickness in a radial direction of a portion neighboring the other end portion in the axis direction of the first housing ### Claim 7 (depends on 1) A rotary electric machine according to claim 1, wherein the flange provided on the cylinder of the ring component is fixed to the first housing or the second housing by a fixing component. ### Claim 8 (depends on 1) A rotary electric machine according to claim 1, wherein the flange provided on the cylinder of the ring component is sandwiched between the first housing and the second housing, and the first housing and the second housing are connected each other by a connection component, whereby the flange is fixed to the first housing and the second housing. ### Claim 9 (depends on 1) A rotary electric machine according to claim 1, wherein the ring component is arranged in such a way that the flange is contacted to the second housing, and the other end portion in the axis direction of the cylinder is directly or indirectly contacted to an inner wall of a bottom portion of the first housing; and the first housing and the second housing are connected each other by a connection component, whereby the ring component is compressed in the axis direction so as to be fixed to the first housing and the second housing. ### Claim 10 (depends on 9) A rotary electric machine according to claim 9, wherein the elastic component, which is disposed between the other end portion in the axis direction of the cylinder and the inner wall of the first housing, is included. ### Claim 11 (depends on 1) A rotary electric machine according to claim 1, wherein the rotor is fixed to a shaft that is supported by the first housing and the second housing in a freely rotational state.