# US 2026/0088674 A1 · Stator and method for manufacturing stator > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2026/0088674 A1 - Document ID: US20260088674A1 - Status: Published application - Kind: A1 - Application number: 19/109,566 - Filed: 2023-08-24 - Published: 2026-03-26 - Earliest claimed: 2022-09-14 - Assignees: Autonetworks Technologies, Ltd.; Sumitomo Wiring Systems, Ltd.; Sumitomo Electric Industries, Ltd. - Applicants: Autonetworks Technologies, Ltd.; Sumitomo Wiring Systems, Ltd.; Sumitomo Electric Industries, Ltd. - Inventors: Kanzo ISHIHARA - Web page: https://patentgrep.com/patent/US20260088674A1 ## CPC - H02K 3/28: Layout of windings or of connections between windings (windings for pole-changing H02K17/06, H02K17/14, H02K19/12, H02K19/32) - H02K 3/50: Fastening of winding heads, equalising connectors, or connections thereto - H02K 1/16: Stator cores with slots for windings - H02K 3/345: {between conductor and core, e.g. slot insulation} - H02K 15/026: Wound cores - H02K 15/122: of windings - H02K 15/32: Manufacture of terminal arrangements; Connecting the terminals to external circuits - H02K 15/33: Connecting winding sections; Forming leads; Connecting leads to terminals - H02K 5/08: Insulating casings - H02K 2203/09: Machines characterised by wiring elements other than wires, e.g. bus rings, for connecting the winding terminations - H02K: DYNAMO-ELECTRIC MACHINES (dynamo-electric relays H01H53/00; conversion of DC or AC input power into surge output power {H03K3/53}) ## Abstract A stator (1) includes a stator core (10), a coil (20), a conducting portion (60), and an insulating resin (40). The stator core (10) has an annular shape. The coil (20) includes a protruding portion (29) that protrudes to one axial side more than an end portion at the one axial side of the stator core (10). A conducting portion (60) is connected to the protruding portion (29). The insulating resin (40) includes a press-fit groove (50) between the insulating resin (40) and the protruding portion (29). The conducting portion (60) is disposed in a state in which the conducting portion (60) is press-fitted into the press-fit groove (50) and pressed against the protruding portion (29). ## Claims ### Claim 1 A stator comprising: an annular stator core; a coil including a protruding portion that protrudes to one axial side more than an end portion at the one axial side of the stator core; a conducting portion connected to the protruding portion; and an insulating resin including a press-fit groove between the insulating resin and the protruding portion, wherein the conducting portion is disposed in a state in which the conducting portion is press-fitted into the press-fit groove and pressed against the protruding portion. ### Claim 2 (depends on 1) The stator according to claim 1, wherein a plurality of the protruding portions are provided, the plurality of protruding portions are regularly arranged in a circumferential direction of the stator core, the insulating resin includes a plurality of the press-fit grooves regularly arranged in the circumferential direction, the plurality of press-fit grooves being disposed between the insulating resin and the plurality of protruding portions regularly arranged in the circumferential direction, a plurality of the conducting portions are provided, the stator further comprises a holding portion that holds the plurality of conducting portions, and the conducting portions held by the holding portion are disposed in a state in which the respective conducting portions are press-fitted into the respective press-fit grooves and pressed against the respective protruding portions. ### Claim 3 (depends on 2) The stator according to claim 2, wherein the plurality of press-fit grooves regularly arranged in the circumferential direction radially extend along a radial direction of the stator core, each of the press-fit grooves includes an opening portion that opens toward the one axial side, and each of the conducting portions is removable from each of the press-fit grooves through the opening portion. ### Claim 4 (depends on 2) The stator according to claim 2, wherein each of the press-fit grooves includes an outer circumferential opening portion that opens radially outward of the stator core, the holding portion is disposed at a more radially outward position than the plurality of press-fit grooves regularly arranged in the circumferential direction, and the respective conducting portions held by the holding portion protrude from a surface at an inner radial side of the holding portion and are disposed in the respective press-fit grooves via the outer circumferential opening portions. ### Claim 5 (depends on 4) The stator according to claim 4, the stator is a stator used in a motor, the stator comprising: a terminal portion electrically connected to a drive unit that drives the motor, wherein the terminal portion has a form in which the terminal portion protrudes from a surface at an outer radial side of the holding portion. ### Claim 6 (depends on 3) The stator according to claim 3, wherein each of the press-fit grooves includes an outer circumferential opening portion that opens radially outward of the stator core, the holding portion is disposed at a more radially outward position than the plurality of press-fit grooves regularly arranged in the circumferential direction, the respective conducting portions press-fitted into the respective press-fit grooves are coupled to a surface at an inner radial side of the holding portion via the outer circumferential opening portions, and the opening portion and the outer circumferential opening portion open continuously. ### Claim 7 (depends on 2) The stator according to claim 2, wherein the holding portion has a form in which the holding portion extends along the circumferential direction in a circular arc shape, and each of the plurality of conducting portions is disposed at a side at which a circumferential direction center of the holding portion is located with respect to a corresponding one of the plurality of protruding portions being a connection target. ### Claim 8 (depends on 1) The stator according to claim 1, wherein a plurality of the protruding portions are provided, the plurality of protruding portions are regularly arranged in a circumferential direction of the stator core, the insulating resin includes a plurality of the press-fit grooves regularly arranged in the circumferential direction, the plurality of press-fit grooves being disposed between the insulating resin and the plurality of protruding portions regularly arranged in the circumferential direction, a plurality of the conducting portions are provided, the conducting portions are disposed in a state in which the respective conducting portions are press-fitted into the respective press-fit grooves and pressed against the respective protruding portions, an entirety in the axial direction of each conducting portion is fitted inside a corresponding press-fit groove, and a side of the protruding portions opposite to a press-fit groove side is covered by the insulating resin. ### Claim 9 (depends on 1) The stator according to claim 1, wherein the stator core includes a plurality of slots regularly arranged in a circumferential direction of the stator core, the coil includes an insertion portion disposed in each slot, the insulating resin includes a filling portion that is filled continuously between an inner wall of each slot and the insertion portion, and a forming portion in which the press-fit groove is formed, and the filling portion and the forming portion are integrally formed. ### Claim 10 (depends on 1) The stator according to claim 1, wherein the coil includes two or more protruding portions regularly arranged in a radial direction of the stator core, one of the press-fit grooves is formed between the two or more protruding portions and the insulating resin, and one of the conducting portions is disposed in a state in which the one conducting portion is press-fitted into the one press-fit groove and pressed against the two or more protruding portions forming the press-fit groove. ### Claim 11 A method for manufacturing a stator, the method comprising: a preparation step of preparing a stator body including an annular stator core, a coil including a protruding portion that protrudes to one axial side more than an end portion at the one axial side of the stator core, a conducting portion connected to the protruding portion, and an insulating resin including a press-fit groove between the insulating resin and the protruding portion; and a press-fitting step of press-fitting the conducting portion into the press-fit groove of the stator body and pressing the conducting portion against the protruding portion. ### Claim 12 (depends on 11) The method for manufacturing the stator according to claim 11, wherein the preparation step includes preparing a unit component having a configuration in which a plurality of the conducting portions are held by a holding portion, a plurality of the protruding portions are provided, the plurality of protruding portions are regularly arranged in a circumferential direction of the stator core, the insulating resin includes a plurality of the press-fit grooves regularly arranged in the circumferential direction, the plurality of press-fit grooves being disposed between the insulating resin and the plurality of protruding portions regularly arranged in the circumferential direction, each of the press-fit grooves includes an opening portion that opens toward the one axial side, and the press-fitting step includes press-fitting the respective conducting portions into the respective press-fit grooves via the opening portions, by displacing the unit component to an other axial side. ### Claim 13 (depends on 11) The method for manufacturing the stator according to claim 11, wherein the stator core includes a plurality of slots regularly arranged in a circumferential direction of the stator core, the coil includes an insertion portion disposed in each slot, the method further comprises a filling step of charging a resin material between an inner wall of each slot and the insertion portion, and the filling step forms the press-fit groove while charging the resin material between the inner wall of the slot and the insertion portion.