CN106655543B

CN106655543B - Stator assembly, motor and electrically driven pump

Info

Publication number: CN106655543B
Application number: CN201510727431.2A
Authority: CN
Inventors: 不公告发明人
Original assignee: Zhejiang Sanhua Automotive Components Co Ltd
Current assignee: Zhejiang Sanhua Automotive Components Co Ltd
Priority date: 2015-10-30
Filing date: 2015-10-30
Publication date: 2019-12-17
Anticipated expiration: 2035-10-30
Also published as: CN106655543A

Abstract

a stator assembly, a motor and an electric drive pump are provided, wherein the stator assembly comprises a stator injection molding part and a winding, the winding is wound on the stator injection molding part, the stator injection molding part comprises a stator core and an insulating layer, and the stator injection molding part takes the stator core as an insert and forms an injection molding part comprising the insulating layer through injection molding; stator core includes that the multi-disc silicon steel sheet is folded and is riveted and connect the formation, and stator core takes shape to have the location portion of moulding plastics, the location portion of moulding plastics including set up in the bellying of stator core outer peripheral face, the bellying with stator core's axial roughly parallel sets up, such stator module is favorable to improving the positioning strength of stator injection molding when winding, and the location is more accurate.

Description

Stator assembly, motor and electrically driven pump

[ technical field ] A method for producing a semiconductor device

The invention relates to a fluid circulation system, in particular to an electrically driven pump.

[ background of the invention ]

In recent decades, electrically driven pumps have gradually replaced conventional mechanical pumps and are used in large numbers in heat cycle systems. The electrically driven pump has the advantages of no electromagnetic interference, high efficiency, environmental protection, stepless speed regulation and the like, and can well meet the market requirements.

The electric drive pump comprises a rotor assembly and a stator assembly, and the rotor assembly and the stator assembly are completely isolated by an isolation sleeve, so that the problem of liquid leakage of the traditional motor type brushless direct current water pump is solved; at present, stator module includes winding and stator injection molding, and the winding stator injection molding sets up, and the structure of stator injection molding is related to whole stator module's fixed, and stator module needs auxiliary structure to be fixed in motor or electric drive pump among the prior art, will occupy the inside space of electric drive pump like this, and the structure is complicated relatively moreover.

Therefore, there is a need for improvement of the prior art to solve the above technical problems.

[ summary of the invention ]

The invention aims to provide a stator assembly structure which is simple in structure and convenient to mount.

In order to achieve the purpose, the invention adopts the following technical scheme: a stator assembly comprises a stator injection molding piece and windings, wherein the stator injection molding piece comprises a plurality of stator tooth parts, and the windings are wound on the stator tooth parts; the stator injection molding part comprises a stator core and an insulating layer, the stator injection molding part takes the stator core as an insert and forms an injection molding part comprising the insulating layer through injection molding, the stator core comprises a core tooth part, the stator tooth part comprises the core tooth part and the insulating layer, the insulating layer is positioned between the core tooth part and a winding so that the winding cannot be in direct contact with the core tooth part, and the inner peripheral surface of the core tooth part is not provided with the insulating layer; the stator core comprises a winding positioning portion, the winding positioning portion is used for limiting rotation of the stator injection molding part when a winding is wound by matching with a tool clamp, the winding positioning portion comprises a protruding portion or a groove portion formed in the outer peripheral surface of the stator core, and the winding positioning portion is arranged approximately parallel to the axial direction of the stator core.

The stator injection molding includes the stator module installation department, the stator module installation department including take shape in the boss of stator injection molding, the boss to the outer peripheral face of stator injection molding extends the formation.

At least two first gaps distributed at intervals are formed on the boss, and the first gaps are distributed along the circumferential direction of the boss; the stator injection molding still includes stator module assembly identification portion, stator module assembly identification portion including set up in a second breach on the boss, the second breach sets up in adjacent between the first breach the boss edge, the second breach with first breach size is different.

the stator injection molding piece comprises a wire blocking part, the wire blocking part comprises a protruding part formed at the end part of the stator injection molding piece, the wire blocking part comprises an inner wire blocking part and an outer wire blocking part, the inner wire blocking part is arranged close to the inner peripheral surface of the iron core tooth part of the stator iron core, and the outer wire blocking part is arranged close to the outer peripheral surface of the iron core tooth part of the stator iron core.

The stator injection molding still includes the needle file, the needle file sets up in part outer gear portion, the needle file includes the blind hole that outer gear portion formed.

The outer wire blocking part provided with the pin inserting seats is provided with a reinforcing part, and the reinforcing part comprises an injection molding layer which is formed on the outer peripheral surface of the stator core and connected with the outer wire blocking part.

The stator injection molding includes that the winding crosses the line portion, the winding crosses the line portion including certainly bellying that the tip of stator injection molding formed, the winding crosses the line portion and sets up in adjacent between the outer wire blocking portion.

The stator injection molding part comprises an injection molding clamping part, the injection molding clamping part comprises an outer clamping part and/or an inner clamping part, the outer clamping part is close to the outer peripheral surface of the stator injection molding part, and the outer clamping part is produced by clamping the outer peripheral surface of the stator core through a clamp for injection molding during injection molding; the inner clamping part is formed close to the inner circumferential surface of the stator injection molding part, and the inner clamping part is produced by clamping the inner circumferential surface of the stator core through a clamp during injection molding and performing injection molding.

The invention also discloses a motor, which comprises a stator component and a rotor component, wherein the stator component surrounds to form a stator component inner cavity, the rotor component is arranged in the stator component inner cavity, and the stator component comprises the stator component.

The invention also discloses an electric drive pump, which comprises a stator component, a rotor component and an electric control plate, wherein the rotor component is relatively positioned at the inner side of the stator component, the electric control plate is electrically connected with the stator component, and the stator component comprises the stator component.

Compared with the prior art, the stator assembly has the advantages that the winding positioning part is formed on the stator iron core, and the winding positioning part is made of rigid materials, so that the positioning accuracy between the stator assembly and the winding is favorably improved in the winding process of the winding.

[ description of the drawings ]

FIG. 1 is a schematic view of one direction of an electrically driven pump according to an embodiment of the present invention;

FIG. 2 is a schematic cross-sectional A-A view of the electrically driven pump of FIG. 1;

FIG. 3 is a schematic perspective view of one direction of a spacer sleeve assembly of the electrically driven pump of FIG. 2;

FIG. 4 is a schematic top view of the isolation sleeve assembly shown in FIG. 3;

FIG. 5 is a schematic bottom view of the isolation sleeve assembly shown in FIG. 3;

FIG. 6 is a schematic view of the cross-sectional B-B configuration of the isolation sleeve assembly of FIG. 4;

FIG. 7 is a perspective view and FIG. 8 is a top view of a stator injection molded part of the stator assembly of the electrically driven pump of FIG. 2;

Fig. 9 is a perspective view of a stator core of the injection molded stator part of fig. 7, and fig. 10 is a top view of the stator core of fig. 9;

FIG. 11 is a schematic view of the assembled stator assembly and electrical control plate modules of FIG. 2;

FIG. 12 is a schematic cross-sectional view of the module of FIG. 11;

Fig. 13 is a schematic diagram of one configuration of the pins of the module of fig. 11.

[ detailed description ] embodiments

The invention will be further described with reference to the following figures and specific examples:

Fig. 1 is a schematic structural diagram of an embodiment of an electronic pump 100, in which the electronic pump 100 includes a pump housing forming a pump cavity, in this embodiment, the pump housing includes an impeller cavity cover 10, an isolation sleeve 20, and a motor housing 30; in the present embodiment, the impeller cavity cover 10, the spacer sleeve 20 and the motor housing 30 are respectively injection molded, the impeller cavity cover 10, the spacer sleeve 20 and the motor housing 30 are fixedly connected by a screw 120 or a bolt, and a sealing ring 130 (see fig. 2) is disposed at a connection portion between the impeller cavity cover 10 and the spacer sleeve 20 and a connection portion between the spacer sleeve 20 and the motor housing 30, so that the sealing property of the connection portion can be improved; referring to fig. 2, the isolating sleeve 20 divides the pump inner cavity into a circulation cavity 91 and an accommodating cavity 92, working medium can flow through the circulation cavity 91, and no working medium flows through the accommodating cavity 92; of course, the pump housing may have other structures, and the structure of the pump housing adopted in this embodiment is relatively simple in manufacturing process and convenient in assembling parts. The electronic pump 100 in this embodiment is mainly used in a heat cycle system, where the heat cycle system includes a cooling cycle system and/or a heating cycle system, or may be a fluid cycle system, and the electronic pump 100 is mainly used to provide a circulating power for a circulating medium. The electronic pump 100 in the present embodiment may be applied to a vehicle cooling circulation system or a heat management system. The electronic pump 100 of this embodiment may be a small-sized, high-lift pump, and the height of the electronic pump 100 is less than or equal to 80mm, and the height of the electronic pump is a vertical distance from a protruding point at the bottom of the motor housing to the end of the flow inlet pipe of the impeller cavity cover.

referring to fig. 2, the electronic pump 100 further includes a pump shaft 40, a rotor assembly 50, a stator assembly 60, an electronic control board 70, and a wiring assembly 80; the rotor assembly 50 is arranged in the circulating cavity 91, and the stator assembly 60 and the electric control plate 70 are arranged in the accommodating cavity 92; the pump shaft 40 and the spacer sleeve 20 are fixed through injection molding, the rotor assembly 50 can rotate around the pump shaft 40, the rotor assembly 50 comprises an impeller part and a rotor part, the rotor part comprises a permanent magnet, the rotor assembly 50 and the stator assembly 60 are separated through the spacer sleeve 20, the stator assembly 60 is electrically connected with the electric control board 70, the electric control board 70 is connected with a connecting line, the electric control board 70 is electrically connected with an external power supply or a signal circuit through the connecting line, and the connecting line is led to the outside of the electronic pump through the wiring assembly 80. In this example, the electronic pump 100 is an inner rotor type electronic pump, and the inner rotor type electronic pump means that the permanent magnet of the rotor assembly 50 is disposed closer to the pump shaft 40 than the stator assembly 60 with the pump shaft 40 as a central axis.

Fig. 3 to 6 are schematic structural views of the isolation sleeve assembly, the isolation sleeve assembly includes an isolation sleeve 20 and a pump shaft 40, and the isolation sleeve assembly is an injection molding piece formed by injection molding by taking the pump shaft 40 as an insert and including the isolation sleeve 20. The spacer 20 is formed with a lower cavity, the lower cavity includes a first cavity 201 and a second cavity 202, the first cavity 201 and the second cavity 202 are communicated, a part of the impeller of the rotor assembly 50 is located in the first cavity 201, at least the permanent magnet of the rotor assembly 50 is located in the second cavity 202, and after the impeller cavity cover 10 and the spacer 20 are fixedly connected, the circulation cavity 91 includes the first cavity 201 and the second cavity 202.

The spacer 20 includes a first cavity sidewall 21, a first cavity bottom 22, a second cavity sidewall 23, a second cavity bottom 24, a spacer connection portion 25, a seal ring mounting groove 26, an impeller cavity cover limiting portion 27, a motor housing limiting portion 28, an impeller cavity positioning portion 29, and an outflow channel sidewall 203. Wherein the first chamber 201 comprises a space surrounded by a first chamber side wall 21 and a first chamber bottom 22 and the second chamber 202 comprises a space surrounded by a second chamber side wall 23 and a second chamber bottom 24. The impeller cavity positioning portion 29 is disposed on the periphery of the first cavity side wall 21, and the impeller cavity positioning portion 29 is used for positioning with the impeller cavity cover 10 so as to ensure the coaxiality of the first cavity and the cavity of the impeller cavity cover. The seal ring installation groove 26 is disposed at the periphery of the impeller cavity positioning portion 29, and the seal ring installation groove 26 is used for accommodating a seal ring between the impeller cavity cover 10 and the spacer 20. The isolation sleeve connecting part 25 is arranged at the periphery of the sealing ring mounting groove 26, and the isolation sleeve connecting part 25 is used for being fixedly connected with the impeller cavity cover 10 and the motor shell 30. The impeller cavity cover limiting part 27 and the motor housing limiting part 28 are arranged on the isolation sleeve connecting part 25, and the impeller cavity cover limiting part 27 is used for determining the installation positions of the impeller cavity cover and the motor housing relative to the isolation sleeve. The outflow channel side wall 203 is disposed on the second impeller cavity side wall 21, and the outflow channel side wall 203 is used to form an outflow channel with the impeller cavity cover 10, so that the working medium leaves the outflow cavity through the outflow channel. In this embodiment, pump shaft 40 is fixed with second chamber bottom 24 by injection molding, and in the department of moulding plastics of second chamber bottom 24 and pump shaft 40, second chamber bottom 24 forms the bellying to second chamber 202 is inside for the thickness of the second chamber bottom 24 with pump shaft complex department of moulding plastics increases, can be favorable to improving fixed connection intensity like this.

the isolation sleeve connecting part 25 comprises support lugs 251 and through holes 252 penetrating through the upper end surface and the lower end surface of the support lugs, the support lugs 251 are formed by protruding outwards from the outer peripheral surface of the isolation sleeve, the support lugs 251 are approximately uniformly distributed along the outer peripheral surface of the isolation sleeve, in the embodiment, the isolation sleeve comprises 5 support lugs 251, and each support lug is provided with a through hole 252; the thickness of the spacer sleeve coupling portion 25 is approximately the entire thickness of the outer portion of the packing installation groove 26, which is advantageous in enhancing the strength of the spacer sleeve coupling portion 25.

The spacer sleeve connection 25 and the packing ring mounting groove 26 are disposed near the outer periphery of the spacer sleeve, and the packing ring mounting groove 26 includes an annular groove formed between the first chamber sidewall 21 of the spacer sleeve 20 and the spacer sleeve connection 25.

The impeller cavity cover limiting portion 27 and the motor housing limiting portion 28 are arranged on one of the support lugs 251 of the isolation sleeve connecting portion 25, in the embodiment, the impeller cavity cover limiting portion 27 comprises a protruding portion formed on the upper surface of the support lug 251, the motor housing limiting portion 28 comprises a notch formed on the lower surface of the support lug 251, and meanwhile, the protruding portion and the notch are correspondingly arranged, so that the uniformity of the thickness of the support lug can be guaranteed. In addition, the impeller cavity cover limiting part 27 can also be provided with more than one support lug, for example, two support lugs are provided, and the structures of the impeller cavity covers are correspondingly matched to realize the limiting. The motor housing position-limiting portion 28 may have more than two or even each lug, and only one or two of them may be used to cooperate with the motor housing for position limitation.

the impeller cavity positioning part 29 is matched with the impeller cavity cover 10; specifically, the impeller chamber positioning portion 29 includes a positioning portion side wall 291 and a positioning portion top surface 292, the positioning portion side wall 291 and the positioning portion top surface 292 are disposed substantially vertically, and the positioning portion side wall 291 is disposed substantially parallel to the first chamber side wall 21; the impeller cavity cover 10 and the isolation sleeve 20 are fixedly connected, the side wall 291 of the positioning part is in radial contact with the corresponding part of the impeller cavity cover 10, and the top surface 292 of the positioning part is axially spaced from the corresponding part of the impeller cavity cover 10 by a certain distance, so that the sealing performance of the circulation cavity at the joint of the impeller cavity cover 10 and the isolation sleeve 20 can be ensured.

The outflow channel side wall 203 is disposed at a connection position of the top surface 292 of the positioning portion of the impeller cavity positioning portion 29 and the first cavity side wall 21, the outflow channel includes a space between the outflow channel side wall 203 and the impeller cavity cover 10, the outflow channel is of an involute structure, so that the working pressure of the working medium is gradually increased, and the maximum working pressure is reached at the outflow port 2031, in this embodiment, the outflow channel includes the outflow channel side wall 203 formed on the isolation sleeve 20 and a space formed between the impeller cavity cover 10, and the processing of the outflow channel is facilitated.

the spacer 20 further comprises a stator limiting part 204, and the stator limiting part 204 comprises an axial limiting part and a radial limiting part; the axial limiting part comprises a first mounting surface 2041 of the stator assembly formed on the lower side of the isolation sleeve, so that the upper end surface of the stator assembly is limited when contacting with the first mounting surface 2041; the radial limiting portion includes a protrusion 2042 formed on the lower side of the spacer sleeve, and the protrusion 2042 is formed by protruding from the outer surface of the groove sidewall of the sealing ring toward the outer surface of the second cavity sidewall 23, so as to limit the rotation of the stator assembly relative to the spacer sleeve.

at least two first reinforcing ribs 231 are formed on the outer surface of the second cavity side wall 23, the first reinforcing ribs 231 protrude outwards from the outer peripheral surface of the second cavity side wall 23 and extend towards the direction of the bottom 24 of the second cavity, the first reinforcing ribs 231 are distributed at equal intervals along the circumference formed by the outer peripheral surface of the second cavity side wall 23, and because the second cavity side wall 23 is used for isolating the rotor assembly and the stator assembly, in order to ensure the magnetic action of the stator assembly and the rotor assembly, the second cavity side wall 23 is generally thinner, and the first reinforcing ribs 231 can enhance the strength of the second side wall 23; the number of the first ribs 231 is the same as that of the tooth grooves of the stator assembly, so that the first ribs 231 can be inserted into the tooth grooves of the stator assembly, the strength of the side wall of the second cavity can be enhanced, and the distance between the stator assembly and the rotor assembly can be prevented from increasing. The width of the first reinforcing rib 231 is slightly smaller than the gap of the teeth of the stator core, thus facilitating the assembly of the stator core and the spacer assembly.

The surface of second chamber bottom 24 is formed with a plurality of second strengthening ribs 241, every second strengthening rib 241 outwards protrudes and follows the outside radial extension in second chamber bottom along second chamber bottom, second strengthening rib 241 is the transmission and distributes in second chamber bottom 24, second strengthening rib 241 is used for increasing the intensity of second chamber bottom 24, second strengthening rib 241 extends the formation to the second chamber bottom for first strengthening rib from the second chamber lateral wall in this embodiment, the second strengthening rib is connected as an organic wholely with the second strengthening rib like this, first strengthening rib and second strengthening rib are connected second chamber bottom and second chamber lateral wall as a whole simultaneously, be favorable to strengthening the intensity of second chamber bottom and second chamber lateral wall junction like this.

A plurality of third reinforcing ribs 221 are formed on the outer surface of the bottom 22 of the first cavity, protrude outwards along the bottom of the first cavity and extend radially along the outer surface of the bottom of the first cavity, and are arranged in a divergent mode and used for enhancing the strength of the bottom of the first cavity; in this embodiment, the third strengthening rib extends to first chamber bottom by first strengthening rib and forms, and the third strengthening rib forms a whole with first strengthening rib like this, and first chamber bottom and second chamber lateral wall are connected to first strengthening rib and third strengthening rib, are favorable to increasing the intensity of first chamber bottom and second chamber lateral wall junction like this.

A plurality of fourth reinforcing ribs 211 are formed on the outer surface of the first cavity side wall 21, the extending direction of the fourth reinforcing ribs 211 is the same as that of the first reinforcing ribs 231, the fourth reinforcing ribs 211 are arranged at intervals along the circumference of the outer circumferential surface of the first cavity side wall 21, and the fourth reinforcing ribs are used for enhancing the strength of the first cavity side wall 21; in this embodiment, the fourth reinforcing rib is formed by extending the third reinforcing rib to the first cavity side wall 21, so that the fourth reinforcing rib and the third reinforcing rib form a whole, and the third reinforcing rib and the fourth reinforcing rib connect the first cavity bottom 22 and the first cavity side wall 21, which is favorable for increasing the strength of the joint of the first cavity bottom and the first cavity side wall.

In this embodiment, the strengthening rib is first strengthening rib, and second chamber bottom strengthening rib is the second strengthening rib, and first chamber bottom strengthening rib is the third strengthening rib, and first chamber lateral wall strengthening rib is the fourth strengthening rib. The first reinforcing rib, the second reinforcing rib, the third reinforcing rib and the fourth reinforcing rib are formed on the peripheral surface of the isolation sleeve and used for enhancing the strength of the isolation sleeve, and meanwhile, the first reinforcing rib, the second reinforcing rib, the third reinforcing rib and the fourth reinforcing rib are connected into a whole, so that the strength of the joint of each part of the isolation sleeve is enhanced, and the isolation sleeve is relatively convenient to process; the first reinforcing rib and the second reinforcing rib, the first reinforcing rib and the third reinforcing rib, and the third reinforcing rib and the fourth reinforcing rib are connected into a whole through the transition part. Of course, the first reinforcing rib, the second reinforcing rib, the third reinforcing rib and the fourth reinforcing rib can be formed independently or arranged in a non-aligned mode, and the strength of each part can be enhanced while the thickness of the isolation sleeve is not increased.

In this embodiment, the thickness of the second reinforcing rib is less than or equal to that of the first reinforcing rib, the thickness of the first reinforcing rib is less than or equal to that of the third reinforcing rib, the thickness of the third reinforcing rib is less than or equal to that of the fourth reinforcing rib, and the thickness of the reinforcing rib is the perpendicular distance between each reinforcing rib and the fixing portion of the spacer sleeve in the direction parallel to the outer surface of the spacer sleeve.

fig. 7 to 10 are schematic views related to a stator injection molded part of the stator assembly 60, the stator assembly 60 including a stator injection molded part 61 and windings (not shown in the drawings), the stator injection molded part 61 including stator teeth 619, the windings being wound around each stator tooth 619 of the stator injection molded part 61 in a regular pattern; the stator injection molding part 61 comprises a stator core 611 and an injection molding layer for coating the stator core 611, and the stator injection molding part 61 comprising the injection molding layer is formed by taking the stator core 611 as an insert and performing injection molding on an injection molding material; stator injection molding 61 includes first end 601, second end 602, inside portion 603 and outside portion 604, first end 601 and second end 602 set up in the both ends of inside portion 603 and outside portion 604 and connect inside portion 603 and outside portion 604, at least part first end 601, second end 602, inside portion 603 and outside portion 604 are formed with the material of moulding plastics, stator tooth 619 for coiling winding includes stator core's iron core tooth 6111 and insulating layer in addition, wherein the surface cladding between iron core tooth 6111 and the winding has plastic material as the insulating layer, the material of moulding plastics includes plastic material, the inner peripheral surface of iron core tooth 6111 does not set up the insulating layer, be favorable to stator assembly and the magnetic action of the permanent magnet of rotor assembly like this. Tooth grooves are formed between the adjacent stator tooth portions 619, the tooth grooves enable certain gaps to be formed between the stator tooth portions 619, the tooth grooves are used for winding or containing windings, of course, groove portions can also be formed in the inner peripheral surfaces of the stator tooth portions 619, and the groove portions can be used for adjusting air gaps of the permanent magnets of the stator assembly 60 and the rotor assembly 50.

Referring to fig. 9 and 10, the stator core 611 is formed by laminating silicon steel sheets, each silicon steel sheet is provided with a riveting hole, and the silicon steel sheets are formed into a whole through riveting combination at the riveting hole; the stator core 611 comprises an iron core tooth portion 6111 and an iron core side wall 6112, the iron core tooth portion 6111 is fixed with the iron core side wall 6112, and the iron core tooth portion 6111 is arranged in an inner cavity of the iron core side wall 6112 and is arranged to protrude inwards from the iron core side wall; the stator core 611 further includes a winding positioning structure 6113, the winding positioning structure 6113 includes a protruding portion formed on the outer peripheral surface of the core side wall 612 of the stator core 611, when winding is performed, the winding positioning structure 6113 is arranged corresponding to a groove of a mold of a winding machine, and is used for positioning when winding of the stator injection molding 6113; stator core 611 sets up wire winding location structure 6113, because stator core 611's intensity is greater than the intensity on the layer of moulding plastics, and the influence of the wire winding power that the wire winding process produced to the position of stator injection molding is less, and in this embodiment, wire winding location structure is the bellying, can avoid reducing the inside magnetic flux of stator core like this.

Referring to fig. 7 and 8, the stator injection molded part 61 includes a stator assembly mounting part 612, and the stator assembly 60 is relatively fixed or limited with respect to the spacer 20 and the motor housing 30 by the stator assembly mounting part 612; the stator assembly mounting part 612 comprises a boss 6121 formed on the stator injection molding part 61, the boss 6121 is formed at the first end 601 of the stator injection molding part 61 or the boss 6121 and the first end 601 of the stator injection molding part 61 are positioned at the same end, the boss 6121 protrudes from the outer peripheral surface of the stator injection molding part 61 to the outside of the stator injection molding part 61, the boss 6121 is provided with first notch structures 6122 distributed at intervals, and the first notch structures 6122 are uniformly distributed along the circumference of the stator injection molding part 61, so that the strength of the boss 6121 is met and the injection molding material can be saved; specifically, the stator assembly mounting portion 612 is relatively fixed between the spacer sleeve 20 and the motor housing 30, and when the spacer sleeve 20 and the motor housing 30 are fixed by screws, the stator assembly mounting portion 612 is limited between the spacer sleeve 20 and the motor housing 30, thereby limiting the axial movement of the stator assembly 60 relative to the spacer sleeve 20.

The stator injection molded part 61 further includes an assembly recognition portion 613, the assembly recognition portion 613 being engaged with the spacer 20 to determine an assembly position of the stator assembly 60 with respect to the spacer 20, the assembly recognition portion 613 being capable of restricting rotation of the stator assembly 60 with respect to the spacer 20; the assembly identification portion 613 includes a second notch structure 6131, the second notch structure 6131 is formed in the boss 6121 of the stator assembly mounting portion 612, wherein the size of the second notch structure 6131 is different from the size of the first notch structure 6122, so as to facilitate distinguishing the second notch structure 6131 and facilitate automatic assembly during assembly, in this embodiment, the size of the second notch structure 6131 is smaller than the size of the first notch structure 6122, an injection molding layer is formed on the outer side portion of the stator core 611 corresponding to the second notch structure 6131, so as to enhance the strength of the injection molding layer at the corresponding second notch structure 6131.

The stator injection molding part 61 comprises a wire blocking part 614, the wire blocking part 614 comprises an inner wire blocking part 6141 and an outer wire blocking part 6142, the inner wire blocking part 6141 is arranged close to the inner peripheral surface of the tail end of the tooth part of the stator core 611, and the number of the inner wire blocking part 6141 is the same as that of the core tooth parts 6111 of the stator core 611 and is used for blocking the windings from falling off to the inner peripheral surface of the stator core 611; the outer wire blocking portion 6142 is disposed close to the outer peripheral surface of the stator core 611, the outer wire blocking portion 6142 is formed at the second end 602 of the stator injection molding 61, the outer wire blocking portion 6142 is used for blocking the winding from falling off the outer peripheral surface of the stator core 611, and the outer wire blocking portion 6142 is formed by protruding from the injection molding layer at the second end 602 of the stator core 611. Both the inner and outer shield portions 6141, 6142 are covered with an injection molded layer as an insulating layer of the winding on the surface facing each other.

The stator injection molding piece 61 further comprises a pin seat 615 and a winding wire passing part 616, the pin seat 615 is formed on a part of the outer wire blocking part 6142, and the pin seat 615 comprises a blind hole formed on the outer wire blocking part 6142; the structure of the injection molding material of the outer wire baffling part 6142 formed with the plug pin seat 615 is more than that of other wire baffling parts, so as to enhance the strength of the plug pin seat 615, in this embodiment, the stator injection molding part 61 further comprises three groups of plug pin seats 615, each group of plug pin seats 615 comprises two plug pin seats 615, an outer wire baffling part without the plug pin seat 615 is arranged between the plug pin seats 615 in the same group at intervals, two wire winding passing parts 616 are formed between the plug pin seats 615 in the same group, the wire winding parts 616 are used for enabling the wire winding to be arranged neatly when the winding winds to the adjacent stator tooth 619 after winding one stator tooth 619, so that the winding wires cannot fall apart and be irregular, the motor corresponding to the stator assembly 60 in this embodiment is a three-phase eight-pole nine-slot permanent magnet brushless direct current motor, the wire winding parts 616 are arranged between the adjacent outer wire baffling parts 6142, the wire winding parts 616 are formed by upward protruding from, the width of the winding passing portion 616 is smaller than the outer shield portion 6142, and the thickness of the winding passing portion 616 is slightly larger than the outer shield portion 6142, so that the strength of the winding passing portion 616 can be improved.

The stator injection molding part 61 further comprises an injection molding clamping part 617, the injection molding clamping part 617 comprises an outer clamping part 6171 and an inner clamping part 6172, the outer clamping part 6171 comprises a notch formed by injection molding layers positioned on the upper end surface and the lower end surface of the stator injection molding part 61, the outer clamping part 6171 is produced by clamping the outer peripheral surface of a stator core through a clamp during injection molding, and the outer clamping part 6171 is specifically positioned on the outer side of an outer baffle part 6142 of the stator injection molding part; the inner clamping portion 6172 is located on the upper surface and the lower surface of the iron core tooth portion 6111, a certain gap is formed between the inner surface of the tooth portion of the stator iron core and the inner surface of the injection molding layer, the inner clamping portion 6172 comprises the gap, the inner surface of the iron core tooth portion of the stator, which is not in contact with a winding, of the stator iron core can not be provided with the injection molding layer, the inner clamping portion and the outer clamping portion are pressed tightly through the clamp to fix the stator iron core in the injection molding clamp, and injection molding can. In addition, only one of the inner clamping part and the outer clamping part can be selected, and then the positioning of the stator core during injection molding can be realized through the positioning of the inner surface of the iron core tooth part of the stator core, which is not in contact with the winding, and a mold.

Referring to fig. 11-13, electrically driven pump 100 includes pins 67, and electronic control board 70 and stator assembly 60 are fixedly connected as a modular unit via pins 67.

In this embodiment, the pin 67 is substantially Y-shaped, the pin 67 includes a first portion 671 and a second portion 672 on the upper side and a third portion 673 on the lower side, an included angle between the third portion 673 and the first portion 671 is substantially 180 °, an included angle between the third portion 673 and the second portion 672 is greater than 90 °, an included angle between the second portion 672 and the first portion 671 is less than 90 °, wherein the third portion 673 has a substantially rectangular cross section and is inserted into the pin seat 615 of the stator assembly 60, the third portion 673 of the pin 67 is in clearance fit with two opposite side walls of the pin seat 615, and the other two opposite planes are in at least partial interference fit to prevent the pin 67 from falling off the pin seat 615, and meanwhile, the two opposite planes in clearance fit facilitate the insertion of the pin 67. The third portion 673 includes a falling off prevention structure 6731, the falling off prevention structure 6731 includes a rough surface formed on the outer surface of one or both of the two opposite sidewalls of the third portion 673, the two opposite sidewalls of the third portion 673 formed with the falling off prevention structure 6731 are tightly fitted with the socket 615, so that the pin 67 can be prevented from falling off the socket 615, and the two opposite sidewalls of the third portion 673 where the falling off prevention structure 6731 is not provided are clearance-fitted with the socket 615, so as to facilitate the insertion of the third portion 6731. Specifically, in the present embodiment, the anti-drop structure 6731 includes two protrusions disposed at intervals on two opposite sidewalls of the third portion 673, and the cross section of the free end 6733 of the third portion 673 is smaller than that of the third portion 673 provided with the protrusions. Of course, the anti-falling structure 6731 may have other forms. The length of the second portion 672 is smaller than that of the first portion 671, the wire of the winding of the stator assembly 60 passes around the joint of the first portion 671 and the second portion 672 of the pin 67 or between the first portion 671 and the second portion 672 and is fixed with the pin 67 by welding, the second portion 672 is close to the first portion 671 to clamp the winding, the cross section of the first portion 671 is approximately rectangular, and the first portion 671 is inserted into the pin hole of the electric control board 70 and is fixed with the electric control board 70 by welding.

The first portion 671 of the pin 67 includes a ramp structure 6711, the ramp structure 6711 being disposed proximate a free end of the first portion. The projection of the second portion 672 near the top of the free end of the first portion in the direction of the axis of the first portion is a distance from the ramp structure 6711 such that the second portion 672 does not contact the electronic control board during assembly.

The electric control board 70 is provided with pin holes 701, the pin holes 701 are distributed along the same circumference of the electric control board 70, and the pin holes 701 are substantially circular holes or square holes. The electric control board 70 includes an assembly positioning portion 702, the assembly positioning portion 702 includes a notch portion disposed on an edge of the electric control board 70, and the assembly positioning portion 702 is used for determining a relative fixing position of the electric control board 70 and the stator assembly 60, and in addition, can also be used for the requirement of automatic assembly.

When the electric control board 70 and the stator assembly 60 are assembled, the third part 673 of the contact pin 67 is inserted into the contact pin seat 615 of the stator assembly 60, the second part 672 of the contact pin 67 is closer to the outer side of the stator assembly 60 relative to the first part 671, the third part 673 of the contact pin 67 is tightly matched with the side wall of the contact pin seat 615 by being inserted into the contact pin seat 615, then the winding is wound on the stator injection molding part 61, the wire at the tail end of the winding is clamped into the joint of the first part 671 and the second part 672 or is wound and fixed by the position between the first part 671 and the second part 672, the wire of the winding is fixed between the second part 672 and the first part by welding, the second part 672 approaches to the first part 671 and clamps the winding during welding, the wire of the winding is fixed with the first part 671 and the second part 672 by spot welding or soldering, and the winding and the contact pin 67 are conducted and electrically connected, so that the contact pin 67 and the stator; then, the notch 702 of the electric control board 70 is placed corresponding to the winding positioning structure 6113 of the stator assembly 60, the pin hole 701 of the electric control board 70 is aligned with the first portion 671 of the pin, the depth of the pin 67 inserted into the pin hole 701 is positioned through the inclined plane structure 6711 of the pin, and the first portion 671 of the pin 67 and the electric control board 70 are fixed through soldering; like this through contact pin 67 with stator module 60 and automatically controlled board 70 formation a module, only need during the equipment of this module set up on stator module location portion can, saved the structure that many location portions lead to complicated and the not unified of location benchmark, the electric drive pump in this embodiment, through set up stator module connecting portion at stator module, be fixed in stator module through spacer sleeve and motor casing and hold the chamber, the automatically controlled board is also corresponding fixed simultaneously, assembly process is simple.

The assembly method of an electrically driven pump comprises an electric control plate, a stator assembly and a contact pin, wherein the electric control plate and the stator assembly are connected into a whole through the contact pin; the stator assembly comprises a stator injection molding body and a plurality of windings, the stator injection molding body comprises a stator core, the stator injection molding body comprises an injection molding piece which is formed by injection molding by taking the stator core as an insert and comprises an injection molding layer, the injection molding layer is provided with a pin seat, the contact pin is tightly matched with the pin seat, the electric control board is provided with a pin hole, and the contact pin penetrates through the pin hole and is welded and fixed with the electric control board; the assembly of the electrically driven pump comprises the steps of:

S1, assembling the stator assembly and the inserting pins: inserting the formed contact pin into a contact pin base, wherein the contact pin is tightly matched with the contact pin base, winding a winding on the stator injection molding body, electrically connecting the tail end of the winding and the contact pin through spot welding or tin soldering, and fixing to form a component of the stator assembly and the contact pin;

S2, fixing the electric control board with the stator assembly and the pin: and the pin holes of the electric control board correspond to the pins, so that the outward free ends of the pins are inserted into the pin holes of the electric control board, and the electric control board and the pins are fixed by soldering to form an integral module with the stator assembly and the electric control board.

The stator assembly is provided with a first mounting and positioning portion and the electronic control board is provided with a second mounting and positioning portion, wherein the step S2 includes aligning the first mounting and positioning portion with the second mounting and positioning portion.

it should be noted that: although the present invention has been described in detail with reference to the above-mentioned embodiments, it should be understood by those skilled in the art that the present invention may be modified and equivalents may be substituted for those skilled in the art, and all technical solutions and modifications that do not depart from the spirit and scope of the present invention should be covered by the claims of the present invention.

Claims

1. A stator assembly comprises a stator injection molding piece and windings, wherein the stator injection molding piece comprises a plurality of stator tooth parts, and the windings are wound on the stator tooth parts; the method is characterized in that: the stator injection molding part comprises a stator core and an insulating layer, the stator injection molding part takes the stator core as an insert and forms an injection molding part comprising the insulating layer through injection molding, the stator core comprises a core tooth part, the stator tooth part comprises the core tooth part and the insulating layer, the insulating layer is positioned between the core tooth part and a winding so that the winding cannot be in direct contact with the core tooth part, and the inner peripheral surface of the core tooth part is not provided with the insulating layer; the stator core comprises a winding positioning part, the winding positioning part is used for being matched with a tool clamp to limit the rotation of the stator injection molding part when a winding is wound, the winding positioning part comprises a protruding part or a groove part formed on the outer peripheral surface of the stator core, and the winding positioning part is arranged in a mode of being approximately parallel to the axial direction of the stator core;

The stator injection molding piece comprises a stator assembly mounting part, the stator assembly mounting part comprises a boss formed on the stator injection molding piece, and the boss extends towards the outer peripheral surface of the stator injection molding piece;

At least two first gaps distributed at intervals are formed on the boss, and the first gaps are distributed along the circumferential direction of the boss; the stator injection molding still includes stator module assembly identification portion, stator module assembly identification portion including set up in a second breach on the boss, the second breach sets up in adjacent between the first breach the edge of boss, the second breach with first breach size is different.

2. the stator assembly of claim 1, wherein: the stator injection molding piece comprises a wire blocking part, the wire blocking part comprises a protruding part formed at the end part of the stator injection molding piece, the wire blocking part comprises an inner wire blocking part and an outer wire blocking part, the inner wire blocking part is arranged close to the inner peripheral surface of the iron core tooth part of the stator iron core, and the outer wire blocking part is arranged close to the outer peripheral surface of the iron core tooth part of the stator iron core.

3. The stator assembly of claim 2, wherein: the stator injection molding still includes the needle file, the needle file sets up in part outer gear portion, the needle file includes the blind hole that outer gear portion formed.

4. the stator assembly of claim 3, wherein: the outer wire blocking part provided with the pin inserting seats is provided with a reinforcing part, and the reinforcing part comprises an injection molding layer which is formed on the outer peripheral surface of the stator core and connected with the outer wire blocking part.

5. the stator assembly of claim 2, wherein: the stator injection molding includes that the winding crosses the line portion, the winding crosses the line portion including certainly bellying that the tip of stator injection molding formed, the winding crosses the line portion and sets up in adjacent between the outer wire blocking portion.

6. the stator assembly of claim 4, wherein: the stator injection molding part comprises an injection molding clamping part, the injection molding clamping part comprises an outer clamping part and/or an inner clamping part, the outer clamping part is close to the outer peripheral surface of the stator injection molding part, and the outer clamping part is produced by clamping the outer peripheral surface of the stator core through a clamp for injection molding during injection molding; the inner clamping part is formed close to the inner circumferential surface of the stator injection molding part, and the inner clamping part is produced by clamping the inner circumferential surface of the stator core through a clamp during injection molding and performing injection molding.

7. An electric machine comprising a stator assembly surrounding a stator assembly inner cavity and a rotor assembly disposed within the stator assembly inner cavity, the stator assembly comprising the stator assembly of any of claims 1-6.

8. An electrically driven pump comprising a stator assembly, a rotor assembly located relatively inside the stator assembly, an electrical control plate electrically connected to the stator assembly, the stator assembly comprising the stator assembly of any one of claims 1 to 6.