# US 2019/0245406 A1 · Stator of a Waterproof Motor and Method for Manufacturing the Same > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2019/0245406 A1 - Document ID: US20190245406A1 - Status: Published application - Kind: A1 - Application number: 16/217,245 - Filed: 2018-12-12 - Published: 2019-08-08 - Earliest claimed: 2018-02-08 - Assignees: Sunonwealth Electric Machine Industry Co., Ltd. - Applicants: Sunonwealth Electric Machine Industry Co., Ltd. - Inventors: Alex Horng; Guo-Hao Chen; Chi-Tsung Tsai - Web page: https://patentgrep.com/patent/US20190245406A1 ## CPC - H02K 5/10: with arrangements for protection from ingress, e.g. water or fingers - H02K 3/50: Fastening of winding heads, equalising connectors, or connections thereto - H02K 5/08: Insulating casings - H02K 11/30: Structural association with control circuits or drive circuits - H02K 15/10: Applying solid insulation to windings, stators or rotors, e.g. applying insulating tapes - H02K 15/12: Impregnating, moulding insulation, heating or drying of windings, stators, rotors or machines - H02K 15/14: Casings; Enclosures; Supports - H02K 15/33: Connecting winding sections; Forming leads; Connecting leads to terminals - H02K 2211/03: Machines characterised by circuit boards, e.g. pcb - 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 for manufacturing a stator of a waterproof motor includes disposing a first assembly in a mold where the first assembly includes a coil unit wound around an iron core assembly, and filling the mold with a thermosetting plastic which forms a housing after curing. The housing houses the coil unit and the iron core assembly. A recess is formed at one end of the housing. The method further includes disposing a second assembly in the recess of the housing where the second assembly includes a circuit unit, and filling the recess of the housing with a waterproof glue which envelopes the circuit unit after curing. According to the above, the stator of the waterproof motor is formed. ## Claims ### Claim 1 A method for manufacturing a stator of a waterproof motor, comprising: disposing a first assembly in a mold, wherein the first assembly includes a coil unit wound around an iron core assembly; filling the mold with a thermosetting plastic which forms a housing after curing, wherein the housing houses the coil unit and the iron core assembly, and wherein a recess is formed at one end of the housing; disposing a second assembly in the recess of the housing, wherein the second assembly includes a circuit unit; and filling the recess of the housing with a waterproof glue which envelopes the circuit unit after curing, forming the stator of the waterproof motor. ### Claim 2 (depends on 1) The method for manufacturing the stator of the waterproof motor as claimed in claim 1, further comprising coupling the iron core assembly with an outer periphery of a shaft tube of the first assembly before forming the housing, wherein the housing is coupled with the outer periphery of the shaft tube, and wherein one end of the shaft tube is not enveloped by the housing and extends into the recess of the housing. ### Claim 3 (depends on 1) The method for manufacturing the stator of the waterproof motor as claimed in claim 1, wherein disposing the second assembly comprises connecting a circuit connector of the circuit unit to a coil connector of the coil unit which is exposed to the recess of the housing, wherein filling the recess comprises enveloping the coil connector of the coil unit and the circuit unit with the waterproof glue. ### Claim 4 (depends on 1) The method for manufacturing the stator of the waterproof motor as claimed in claim 1, wherein the coil unit includes a wire wound around a post of the iron core assembly, wherein a free end of the post extends out of the housing and is exposed to the recess after forming the housing, wherein disposing the second assembly comprises disposing a circuit board of the circuit unit in the recess of the housing and engaging the circuit board of the circuit unit with the post of the iron core assembly, and wherein filling the recess comprises enveloping the post and the circuit board with the waterproof glue. ### Claim 5 (depends on 1) The method for manufacturing the stator of the waterproof motor as claimed in claim 1, wherein the thermosetting plastic is bulk molding compound (BMC). ### Claim 6 (depends on 1) The method for manufacturing the stator of the waterproof motor as claimed in claim 1, wherein the waterproof glue is polyurethane (PU) or silicone glue. ### Claim 7 A method for manufacturing a stator of a waterproof motor, comprising: disposing a first assembly in a mold, wherein the first assembly includes a coil unit wound around an iron core assembly; positioning a second assembly in an electric box, wherein the electric box includes a circuit unit; filling the mold with a thermosetting plastic which forms a housing after curing, wherein the housing houses the coil unit and the iron core assembly, wherein a recess is formed at one end of the housing, and wherein a retaining ring forms at a circumferential edge of the recess; filling the electric box with a waterproof glue which envelopes the circuit unit after curing; and engaging the electric box with the housing to press the retaining ring against the waterproof glue, forming the stator of the waterproof motor. ### Claim 8 (depends on 7) The method for manufacturing the stator of the waterproof motor as claimed in claim 7, wherein engaging the electric box comprises connecting a circuit connector of the circuit unit, which is exposed out of the waterproof glue, to a coil connector of the coil unit which is exposed out of the housing before pressing the retaining ring against the waterproof glue. ### Claim 9 (depends on 7) The method for manufacturing the stator of the waterproof motor as claimed in claim 7, wherein the thermosetting plastic is bulk molding compound (BMC). ### Claim 10 (depends on 7) The method for manufacturing the stator of the waterproof motor as claimed in claim 7, wherein the waterproof glue is polyurethane (PU) or silicone glue. ### Claim 11 A stator of a waterproof motor, comprising: a first assembly having a coil unit wound around an iron core assembly; a housing made of thermosetting plastic and housing the coil unit and the iron core assembly, wherein a recess is formed at one end of the housing; a second assembly disposed in the recess of the housing and including a circuit unit, wherein the recess is filled with a waterproof glue which envelopes the circuit unit. ### Claim 12 (depends on 11) The stator of the waterproof motor as claimed in claim 11, wherein the first assembly includes a shaft tube, wherein the iron core assembly is coupled with an outer periphery of the shaft tube, wherein the housing is coupled with the outer periphery of the shaft tube, and wherein one end of the shaft tube is not enveloped by the housing and extends into the recess. ### Claim 13 (depends on 11) The stator of the waterproof motor as claimed in claim 11, wherein the coil unit includes a coil connector exposed to the recess of the housing and connected to a circuit connector of the circuit unit, and wherein the waterproof glue envelopes the coil connector of the coil unit and the circuit unit. ### Claim 14 (depends on 12) The stator of the waterproof motor as claimed in claim 12, wherein the second assembly includes a support coupled with the shaft tube and located in the recess of the housing, and wherein the circuit unit includes a circuit board coupled with the support. ### Claim 15 (depends on 14) The stator of the waterproof motor as claimed in claim 14, wherein a shoulder portion is provided on the outer periphery of the shaft tube, wherein the housing includes an axial extension portion abutting the outer periphery of the shaft tube and extending into the recess of the housing, wherein a free end of the axial extension portion abuts the shoulder portion, and wherein the support is connected to the axial extension portion. ### Claim 16 (depends on 11) The stator of the waterproof motor as claimed in claim 11, wherein the iron core assembly includes a post having a free end extending out of the housing and exposed to the recess, wherein the coil unit includes a wire wound around the post of the iron core assembly, wherein the circuit unit includes a circuit board located in the recess of the housing and engaged with the post of the iron core assembly, and wherein the waterproof glue envelopes the post and the circuit board. ### Claim 17 A stator of a waterproof motor, comprising: a first assembly having a coil unit wound around an iron core assembly; a second assembly including a circuit unit; a housing made of thermosetting plastic and housing the coil unit and the iron core assembly, wherein a recess is formed at one end of the housing, and wherein a retaining ring forms at a circumferential edge of the recess; and an electric box receiving the second assembly and filled with a waterproof glue to envelope the circuit unit with the waterproof glue, wherein the electric box and the housing are coupled with each other, and wherein the retaining ring is pressed against the waterproof glue. ### Claim 18 (depends on 17) The stator of the waterproof motor as claimed in claim 17, wherein the coil unit includes a coil connector exposed out of the housing and connected to a circuit connector of the circuit unit which is exposed out of the waterproof glue, and wherein the coil connector of the coil unit is connected to the circuit connector of the circuit unit in an, inner space delimited by an inner periphery of the retaining ring. ### Claim 19 (depends on 17) The stator of the waterproof motor as claimed in claim 17, wherein a rotor space is formed at a center of the housing, and wherein the housing includes a shaft-coupling portion located in the rotor space. ### Claim 20 (depends on 17) The stator of the waterproof motor as claimed in claim 17, wherein the housing includes a plurality of screwing portions surrounding the retaining ring and screwed to a plurality of screwing portions of the electric box. ### Claim 21 (depends on 17) The stator of the waterproof motor as claimed in claim 17, wherein the plurality of screwing portions of the housing is located outside the waterproof glue. ### Claim 22 (depends on 17) The stator of the waterproof motor as claimed in claim 17, wherein a wire groove is provided surrounding an outer periphery of the retaining ring, wherein the wire groove is not intercommunicating with an inner space delimited by an inner periphery of the retaining ring, wherein the circuit unit includes a wire connected to a circuit board, wherein a portion of the wire, that is connected to the circuit board is enveloped by the waterproof glue, and wherein the wire is partially exposed out of the waterproof glue and extends out of the housing through the wire groove.