# US 11,121,600 B2 · Motor and blower > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 11,121,600 B2 - Document ID: US11121600B2 - Status: Granted - Kind: B2 - Application number: 16/656,885 - Filed: 2019-10-18 - Published: 2020-05-07 - Granted: 2021-09-14 - Earliest claimed: 2018-11-07 - Assignees: Nidec Corporation - Applicants: Nidec Corporation - Inventors: Hidehiko Hidaka; Yuji Saiki; Tomoyuki Tanaka; Tomohiro Koguchi - Web page: https://patentgrep.com/patent/US11121600B2 ## CPC - H02K 3/522: {for generally annular cores with salient poles} - F04D 25/06: the pump being electrically driven (F04D25/08 takes precedence) - F04D 25/0633: {Details of the magnetic circuit} - F04D 25/0646: {Details of the stator} - H02K 1/187: {to inner stators} - H02K 5/165: {radially supporting the rotor around a fixed spindle; radially supporting the rotor directly (H02K5/167, H02K5/173 take precedence)} - H02K 5/1675: {radially supporting the rotary shaft at only one end of the rotor (H02K5/1677 takes precedence)} - H02K 5/24: specially adapted for suppression or reduction of noise or vibrations - H02K 7/086: {radially supporting the rotor around a fixed spindle; radially supporting the rotor directly (H02K7/09 takes precedence)} - H02K 7/14: Structural association with mechanical loads, e.g. with hand-held machine tools or fans (with fan or impeller for cooling the machine H02K9/06) - H02K 11/30: Structural association with control circuits or drive circuits - H02K 21/22: with magnets rotating around the armatures, e.g. flywheel magnetos - H02K 2203/03: Machines characterised by the wiring boards, i.e. printed circuit boards or similar structures for connecting the winding terminations - H02K 2203/06: Machines characterised by the wiring leads, i.e. conducting wires for connecting the winding terminations - H02K 2203/12: Machines characterised by the bobbins for supporting the windings - H02K: DYNAMO-ELECTRIC MACHINES (dynamo-electric relays H01H53/00; conversion of DC or AC input power into surge output power {H03K3/53}) - F04D: NON-POSITIVE-DISPLACEMENT PUMPS (engine fuel-injection pumps F02M; ion pumps H01J41/12; electrodynamic pumps H02K44/02) ## Abstract A motor includes a stationary portion, a rotating portion, and a bearing portion. The rotating portion includes a shaft that rotates about a central axis extending vertically. The stationary portion includes a bearing housing, a stator, and a circuit board. The circuit board is above the stator and includes an insertion hole that permits insertion of the bearing housing. The stator includes a stator core, an insulator, a coil, and a terminal pin. The terminal pin is connected to a conductive wire and connected to the circuit board via a solder portion covered with a coating layer. The insulator includes a base portion and a wall portion. The wall portion protrudes upward from the base portion, is radially outward of the bearing housing, and contacts a radially inner surface of the circuit board at the insertion hole. ## Claims ### Claim 1 A motor comprising: a stationary portion; a rotating portion including a shaft that rotates about a central axis extending vertically; and a bearing portion that rotatably supports the shaft with respect to the stationary portion; wherein the stationary portion includes: a cylindrical bearing housing that holds the bearing portion; and a stator radially outward of the bearing housing, and a circuit board above the stator and including an insertion hole to permit insertion of the bearing housing; the stator includes: a stator core including an annular core back and a plurality of teeth extending radially outward from the core back and in a circumferential direction; an insulator covering at least a portion of the stator core; a coil in which a conductive wire is wound around the teeth with the insulator interposed therebetween; and a terminal pin connected to the conductive wire, passing through a through-hole in the circuit board to protrude above the circuit board, and connected to the circuit board by a solder portion covered with a coating layer; the insulator includes: a base portion covering at least a portion of an upper portion of the stator core; and a wall portion protruding upward from the base portion, radially outward of the bearing housing, and contacting a radially inner surface of the circuit board at the insertion hole; the wall portion opposes the solder portion in a radial direction; a width in a circumferential direction of the wall portion is larger than a width in a circumferential direction of the solder portion; and an upper end of the wall portion is positioned axially above an upper surface of the circuit board. ### Claim 2 (depends on 1) The motor according to claim 1, wherein the circuit board includes a board projecting portion protruding radially inward from a radially inner surface in the insertion hole; the wall portion includes a notch portion that is recessed axially downward; and the board projecting portion is fitted to the notch portion. ### Claim 3 (depends on 2) The motor according to claim 2, wherein a radially inner end of the board projecting portion is at a same position in a radial direction or radially outward with respect to a radially inner surface of the wall portion. ### Claim 4 (depends on 3) The motor according to claim 3, wherein a lower end of the notch portion is located axially below a lower surface of the circuit board. ### Claim 5 (depends on 1) The motor according to claim 1, wherein the circuit board includes a board projecting portion protruding radially inward from a radially inner surface at the insertion hole; the wall portion is on a radially outer surface, and includes an insulator recess recessed radially inward; and the board projecting portion is fitted to the insulator recess. ### Claim 6 (depends on 1) The motor according to claim 1, wherein a total thickness in an axial direction of the coating layer covering a peripheral portion of the solder portion is larger than a total thickness in an axial direction of the coating layer covering a central portion of the solder portion. ### Claim 7 (depends on 1) The motor according to claim 1, wherein the bearing housing includes a support portion protruding radially outward from a radially outer surface; and an axially lower surface of the support portion contacts an upper surface of the core back in an axial direction. ### Claim 8 (depends on 7) The motor according to claim 7, wherein a radially outer surface of the support portion contacts a radially inner surface of the wall portion. ### Claim 9 (depends on 1) The motor according to claim 1, wherein the bearing housing includes a housing projecting portion protruding radially outward from a radially outer surface; the core back includes a stator recess that is located radially inward of the teeth and recessed radially outward from a radially inner surface of the core back; and the housing projecting portion is fitted to the stator recess. ### Claim 10 (depends on 1) The motor according to claim 1, wherein an upper portion of the wall portion is divided in a circumferential direction into portions as many as the terminal pins. ### Claim 11 (depends on 1) The motor according to claim 1, wherein the terminal pin is between the teeth that are adjacent each other. ### Claim 12 (depends on 1) A blower comprising: the motor according to claim 1; and an impeller that is fixed to the shaft and rotates around a central axis.