CN216056713U

CN216056713U - External rotor motor for driving automobile cooling fan

Info

Publication number: CN216056713U
Application number: CN202122653826.6U
Authority: CN
Inventors: 丁言闯; 陈志强; 朱天杰
Original assignee: Jiangsu Langxin Electric Co ltd
Current assignee: Jiangsu Langxin Electric Co ltd
Priority date: 2021-11-02
Filing date: 2021-11-02
Publication date: 2022-03-15
Anticipated expiration: 2031-11-02

Abstract

The utility model discloses an outer rotor motor for driving an automobile cooling fan, which comprises a controller component, a conductive support, a PCBA board, an armature component and an outer rotor assembly, wherein the conductive support comprises three mounting hole parts, terminal protection parts are arranged on the peripheries of the mounting hole parts and are connected with the mounting hole parts through connecting rods, positioning embedded grooves are formed in the back parts of the connecting rods, a conductive connecting rod is respectively arranged on each mounting hole part, the middle part of each conductive connecting rod is embedded into the corresponding positioning embedded groove, the tail end of each conductive connecting rod is a connecting terminal and is positioned in the corresponding terminal protection part, the connecting terminal is inserted into the corresponding conductive hole on the PCBA board to be welded and fixed, and the armature component is electrically connected with the PCBA board through the conductive connecting rods. The outer rotor motor can effectively protect dropped soldering tin when the conductive connecting rod is welded, and short circuit of the motor is avoided.

Description

External rotor motor for driving automobile cooling fan

Technical Field

The utility model relates to an outer rotor motor, in particular to an outer rotor motor for driving an automobile cooling fan.

Background

The existing external rotor motor for driving the cooling fan of the automobile comprises a controller assembly, wherein the controller assembly comprises a shell consisting of a heat radiation seat and a rear end cover, the shell is internally provided with a conductive bracket and a PCBA board, the front surface of the heat radiating seat is provided with a central shaft, the front surface of the heat dissipation seat is provided with an armature component, the central shaft is rotatably provided with an outer rotor assembly, the heat dissipation seat is provided with an inductance mounting area, a conductive bracket mounting area, a wire harness joint area and a heat conduction platform, the conductive bracket is arranged in the conductive bracket mounting area, an inductor is arranged in the inductor mounting area, a wire harness conductive pin is arranged in the wire harness joint area, the inductor and the wire harness conductive pins are welded and fixed with the corresponding conductive holes on the PCBA board, and the conductive connecting rod is inserted on the conductive bracket and electrically connects the armature component and the PCBA board together. And when electrically conductive connecting rod and PCBA board of welding, soldering tin probably drops along electrically conductive connecting rod, and the tin that drops does not protect or collect, consequently probably leads to each pin mistake on the PCBA board to touch the soldering tin that drops, leads to the PCBA board short circuit.

In addition, the wire harness winding is electrically connected with the PCBA board of the controller component through the conductive connecting rod on the conductive support, the metal protection hook is embedded in the insulating end cover of the armature component, the metal protection hook is provided with a connecting rod hook part facilitating the connection of the conductive connecting rod and a wire harness hook part facilitating the passing of the wire harness, when the output power of the brushless motor is increased to 600W, for example, more wire harnesses of the armature winding are required, the number of the wire harness hook parts bypassing the wire harness hook parts is also larger, the existing wire harness hook parts obviously do not meet the winding of the wire harness, meanwhile, the insulating skin on the outer layer of the wire harness is damaged during clamping welding, so that the wire harness and the metal protection hook are welded together, however, because more wire harnesses are wound on the wire harness hook parts, the crossing condition can occur among the wire harnesses, and the insulating skin on the outer layer of the wire harness wrapped inside the wire harness hook parts is not damaged during clamping welding, thereby resulting in no electrical connection with other wiring harnesses and thus the armature assembly being incorrectly wired for proper operation.

SUMMERY OF THE UTILITY MODEL

The technical problem to be solved by the utility model is as follows: the outer rotor motor for driving the automobile cooling fan can effectively protect dropped soldering tin when a conductive connecting rod is welded, and the motor short circuit is avoided.

In order to solve the technical problems, the technical scheme of the utility model is as follows: an outer rotor motor for driving an automobile cooling fan comprises a controller assembly, wherein the controller assembly comprises a shell consisting of a heat radiating seat and a rear end cover, a conductive support and a PCBA board are arranged in the shell, a central shaft is arranged on the front surface of the heat radiating seat, an armature assembly is arranged on the front surface of the heat radiating seat, an outer rotor assembly is rotatably arranged on the central shaft, an inductance mounting area, a conductive support mounting area, a wire harness joint area and a heat conducting platform are arranged on the heat radiating seat, the conductive support is placed in the conductive support mounting area, an inductor is arranged in the inductance mounting area, a wire harness conductive pin is arranged in the wire harness joint area, the inductor and the wire harness conductive pin are welded and fixed with a corresponding conductive hole in the PCBA board, three through holes are arranged in the conductive support mounting area on the heat radiating seat, and the conductive support comprises three mounting hole parts, the periphery of this installation hole portion is provided with semi-closed terminal protection portion, is connected through the connecting rod between this terminal protection portion and the installation hole portion, and the back of this connecting rod is provided with the location caulking groove that both ends extend to terminal protection portion and installation hole portion respectively, installs a conductive connecting rod on every installation hole portion respectively, the one end of conductive connecting rod is inserted corresponding installation hole portion and is worn out from the through hole, the middle part embedding of conductive connecting rod is in the location caulking groove that corresponds, the tail end of conductive connecting rod is connecting terminal and is in corresponding terminal protection portion, and this connecting terminal inserts and corresponds electrically conductive hole welding on the PCBA board and fixes, electrically conductive connecting rod is connected armature subassembly and PCBA board electricity.

As a preferred scheme, the armature assembly comprises a stator core, and a back side insulating end cover and a front side insulating end cover which are respectively fixed at the back side end and the front side end of the stator core, wherein a stator winding is wound between the back side insulating end cover and the front side insulating end cover, three metal protection hooks are fixed on the front side insulating end cover, the stator winding is wound according to a winding rule and spans the metal protection hooks to be fixed with the metal protection hooks in a clamping and welding manner, and the stator winding forms a three-phase winding; the metal protection hook comprises a protection hook body fixed with a front insulating end cover in a plug-in mounting mode, a connecting rod hook portion convenient to correspond and inserted into a conductive connecting rod is arranged on each protection hook body, two wire harness hook portions are further arranged on each protection hook body, a hook line groove convenient for a wire harness to stride across is formed in each wire harness hook portion, each hook line groove comprises a back side groove face, a front side groove face and a connecting arc face connecting the back side groove face and the front side groove face, included angles between the back side groove face and the front side groove face and an axial lead of a stator core are 85-90 degrees, and an opening of each hook line groove faces to the center of the stator core. Like this, when the wire winding, the pencil will be in order around on the dorsal part groove face of hook wire casing and arrange neatly, can not appear the alternately condition of pencil because inclination is too big, when the clamp welding, the dorsal part groove face and the positive lateral groove face of hook wire casing draw close each other and will all destroy the insulating skin of all pencil that are in the hook wire casing, every pencil can both be fine like this by the welding, armature assembly work is also more reliable, simultaneously because all there are two pencil hook portions on every hook body that protects, make things convenient for more like this to select the winding of pencil hook portion nearby when the wire winding, thereby satisfy the wire winding requirement of the bigger motor of power.

Preferably, the back side slot surface and the front side slot surface are parallel to each other and form an angle of 90 ° with the axial lead of the stator core.

Preferably, the distance between the back-side groove surface and the front-side groove surface is greater than the diameter of one wire harness and less than the diameter of two wire harnesses. Therefore, the wiring harness can conveniently enter the wire hooking groove during winding, and meanwhile, the condition that the wiring harness cannot cross is ensured.

Preferably, the wire harness hook is provided with a flared guide portion at the opening. The guide part can facilitate the wiring harness to better enter the hooking groove during winding.

As a preferable scheme, the front insulating end cover is of a split structure, the front insulating end cover comprises a middle phase ring and a plurality of front tooth end cover parts positioned at the outer side of the middle phase ring, the front tooth end cover parts are correspondingly fixed on the front sides of the tooth parts of the stator iron core one by one, the middle phase ring is fixed in the middle of the stator iron core, the metal protection hook is inserted and fixed on the middle phase ring, the outer side and the inner side of the front tooth end cover part are respectively provided with a front outer positioning bulge and a front inner positioning bulge, the back insulation end cover comprises a middle insulation ring part and a plurality of back tooth end cover parts connected with the outer side of the middle insulation ring part, the outer side and the inner side of each back tooth end cover part are respectively provided with a back outer positioning bulge and a back inner positioning bulge, the back outer positioning bulge and the front outer positioning bulge jointly restrain the outer side end of the wire harness winding, and the back inner positioning bulge and the front inner positioning bulge jointly restrain the inner side end of the wire harness winding. Therefore, the wire harness can be wound on the back tooth end cover part and the front tooth end cover part in a better restrained manner in the winding process, and the wire harness is tidier

As a preferred scheme, the terminal guard portion includes end guard plate portion and side guard plate portion, the back of end guard plate portion links up with the back of connecting rod, set up the breach of dodging that corresponds with the connecting rod position on the side guard plate. This terminal protection part utilizes the end guard plate to protect the bottom, avoids soldering tin to fall into the radiating seat on, and side guard plate portion is used for protecting the side, and the protecting effect is better.

As a preferable scheme, a positioning ring part is arranged in the middle of the three mounting hole parts, the positioning ring part is respectively connected with the three mounting hole parts through connecting ribs, and a positioning boss inserted into the positioning ring part is arranged on the corresponding mounting area of the conductive bracket. Thus, the conductive bracket can be better installed by utilizing the positioning ring part and the positioning boss.

As a preferred scheme, the conductive bracket mounting area is a sinking groove area, the conductive bracket is mounted in the sinking groove area, and the conductive bracket mounting area is provided with a positioning sinking groove area which is in one-to-one corresponding adaptation with the shape of the terminal protection part. The position of the conductive support can be better determined by utilizing the positioning sink region, so that the conductive connecting rod can more accurately penetrate through the through hole of the heat dissipation seat.

After the technical scheme is adopted, the utility model has the effects that: because the heat radiation seat is provided with three through holes in the installation area of the conductive bracket, the conductive bracket comprises three installation hole parts, the periphery of the installation hole part is provided with a semi-closed terminal protection part, the terminal protection part is connected with the installation hole part through a connecting rod, the back of the connecting rod is provided with a positioning caulking groove with two ends respectively extending to the terminal protection part and the installation hole part, each installation hole part is respectively provided with a conductive connecting rod, one end of each conductive connecting rod is inserted into the corresponding installation hole part and penetrates out of the through hole, the middle part of each conductive connecting rod is embedded into the corresponding positioning caulking groove, the tail end of each conductive connecting rod is a connecting terminal and is positioned in the corresponding terminal protection part, the connecting terminal is inserted into the corresponding conductive hole on the PCBA board and is welded and fixed, the armature component is electrically connected with the PCBA board through the conductive connecting rods, therefore, when the connecting terminal is inserted into the hole of the PCBA board and welded, the terminal protection portion can effectually protect connecting terminal, has the soldering tin that drops in time, also can avoid the soldering tin that drops to contact with the pin of PCBA board because of the protection of semi-enclosed terminal protection portion, avoids the phenomenon of short circuit to take place.

Drawings

The utility model is further illustrated with reference to the following figures and examples.

FIG. 1 is a perspective view of an embodiment of the present invention;

FIG. 2 is an exploded view of the outer rotor assembly hidden;

FIG. 3 is an exploded view of another angle with the outer rotor assembly hidden;

fig. 4 is a perspective view of the armature assembly;

FIG. 5 is a perspective view of an interphase ring, metal guard hook;

FIG. 6 is a side schematic view of a metal hook guard;

FIG. 7 is an enlarged schematic view of FIG. 3 at A;

in the drawings: 1. an outer rotor assembly; 2. a controller assembly; 21. a heat dissipation base; 211. a conductive mount mounting area; 2111. positioning the boss; 2112. a sink zone; 212. an inductor mounting area; 213. a wire harness joint area; 22. a rear end cap; 23. a central shaft; 3. an armature assembly; 31. a stator core; 32. a stator winding; 33. a front insulating end cover; 331. an intermediate phase ring; 332. the front surface is provided with a positioning bulge; 333. an inner positioning bulge is arranged on the front surface; 34. a metal protection hook; 341. a hook protection body; 342. embedding a pin; 343. a wire harness hook portion; 344. a connecting rod hook portion; 345. a back side groove surface; 346. a front side groove surface; 347. a guide portion; 35. a back side insulating end cap; 4. PCBA board; 5. a conductive support; 51. an installation hole portion; 52. a terminal protection part; 53. a positioning ring portion; 54. positioning the caulking groove; 55. a connecting rod; 56. reinforcing ribs; 57. connecting ribs; 6. a conductive connecting rod; 61. a first pole segment; 62. a second pole segment; 63. a third pole segment.

Detailed Description

The present invention is described in further detail below with reference to specific examples.

As shown in fig. 1 to 7, an external rotor motor for driving an automobile cooling fan includes a controller component 2, the controller component 2 includes a housing composed of a heat dissipation seat 21 and a rear end cover 22, a conductive bracket 5 and a PCBA board 4 are disposed in the housing, a central shaft 23 is disposed on a front surface of the heat dissipation seat 21, an armature component 3 is mounted on the front surface of the heat dissipation seat 21, the external rotor assembly 1 is rotatably mounted on the central shaft 23, an inductance mounting area 212, a conductive bracket 5 mounting area 211, a wire harness joint area 213 and a heat conduction platform are disposed on the heat dissipation seat 21, the conductive bracket 5 is disposed in the conductive bracket 5 mounting area 211, an inductance is disposed in the inductance mounting area 212, a wire harness joint area 213 is disposed with a wire harness conductive pin, the inductance and the wire harness conductive pin are both welded and fixed to a corresponding conductive hole on the PCBA board 4, an insulating heat conduction glue is disposed between the PCBA board 4 and the heat conduction platform, thereby conducting heat from the PCBA board 4 to the heat sink 21.

Three through holes are formed in the mounting area 211 of the conductive bracket 5 on the heat dissipation seat 21, the conductive bracket 5 comprises three mounting hole parts 51, a semi-closed terminal protection part 52 is arranged on the periphery of the mounting hole part 51, the terminal protection part 52 is connected with the mounting hole part 51 through a connecting rod 55, a positioning caulking groove 54 with two ends extending to the terminal protection part 52 and the mounting hole part 51 is arranged on the back of the connecting rod 55, a conductive connecting rod 6 is respectively mounted on each mounting hole part 51, one end of each conductive connecting rod 6 is inserted into the corresponding mounting hole part 51 and penetrates out of the through hole, a waterproof sleeve is arranged between each conductive connecting rod 6 and the through hole, the middle part of each conductive connecting rod 6 is embedded into the corresponding positioning caulking groove 54, the tail end of each conductive connecting rod 6 is a connecting terminal and is positioned in the corresponding terminal protection part 52, and the connecting terminal is inserted into the corresponding conductive hole on the PCBA board 4 and welded and fixed, the conductive link 6 electrically connects the armature assembly 3 to the PCBA board 4.

The conductive connecting rod 6 in this embodiment is a three-segment connecting rod including a first segment 61, a second segment 62, and a third segment 63, the first segment 61 is inserted into the mounting hole portion 51 and the through hole, the second segment 62 is embedded in the corresponding positioning caulking groove 54, the third segment 63 is a connecting terminal, and the third segment 63 is protected by the terminal protection portion 52 and is welded to the PCBA board 4.

As shown in fig. 7, the terminal protection part 52 includes a bottom protection plate part and a side protection plate part, the back surface of the bottom protection plate part is connected to the back surface of the connecting rod 55, and an avoiding notch corresponding to the connecting rod 55 is formed in the side protection plate part. This terminal protection part 52 utilizes the end guard plate to protect the bottom, avoids soldering tin to fall into on the radiating seat 21, and the side guard plate portion is used for protecting the side, and the safeguard effect is better.

And the middle of the three mounting hole parts 51 is provided with a positioning ring part 53, the positioning ring part 53 is respectively connected with the three mounting hole parts 51 through a connecting rib 57, and a positioning boss 2111 inserted into the positioning ring part 53 is arranged on the corresponding mounting area of the conductive bracket 5. Thus, the conductive bracket 5 can be better mounted by the positioning ring part 53 and the positioning boss 2111. And reinforcing ribs 56 are connected between the three terminal protection parts 52 so that the entire conductive holder 5 is hollowed out but has sufficient strength. In order to better place the conductive bracket 5, the mounting region 211 of the conductive bracket 5 is a sink region 2112, the conductive bracket 5 is mounted in the sink region 2112, and the mounting region 211 of the conductive bracket 5 is provided with positioning sink regions which are correspondingly adapted to the shapes of the terminal protection parts 52. The orientation of the conductive bracket 5 can be better determined by utilizing the positioning sink area, so that the conductive connecting rod 6 can more accurately penetrate through the through hole of the heat dissipation seat 21.

As shown in fig. 2 to 6, the armature assembly 3 includes a stator core 31, and a back insulating end cover 35 and a front insulating end cover 33 respectively fixed to a back end and a front end of the stator core 31, a stator winding 32 is wound between the back insulating end cover 35 and the front insulating end cover 33, three metal protection hooks 34 are fixed on the front insulating end cover 33, the stator winding 32 is wound according to a winding rule and fixed to the metal protection hooks 34 by clamping welding, so that the stator winding 32 forms a three-phase winding; the metal protection hook 34 comprises protection hook bodies 341 inserted and fixed with the front insulating end cover 33, each protection hook body 341 is provided with a connecting rod hook part 344 for conveniently inserting the corresponding conductive connecting rod 6, the protection hook body 341 is also provided with two wire harness hook parts 343, the two wire harness hook parts 343 provide a choice for winding, which is convenient for winding and simultaneously avoids the wire harness from being concentrated on one hook part to be overlapped, the overlapped wire harness is easy to have poor conductive contact due to incomplete skin breaking during the clamping welding, the wire harness hook 343 is provided with a wire hooking groove for facilitating crossing of the wire harness, the wire hooking groove comprising a back-side groove face 345, a front-side groove face 346, and a connecting arc face connecting the back-side groove face 345 and the front-side groove face 346, the angles between the back-side groove surfaces 345 and the front-side groove surfaces 346 and the axial line of the stator core 31 are 85 to 90 degrees, preferably, the back-side groove surface 345 and the front-side groove surface 346 are parallel to each other and form an angle of 90 ° with the axial line of the stator core 31.

The opening of the hooking slot faces the center of the stator core 31. Like this, when the wire winding, the pencil will be in order around on the dorsal part groove face 345 in hook wire groove and arrange neatly, can not appear the condition that the pencil is alternately because of inclination is too big, when the clamp welding, dorsal part groove face 345 and positive side groove face 346 in hook wire groove draw close each other and will all destroy the insulating skin of all pencil that are in the hook wire inslot, every pencil can both be fine like this by the welding, armature assembly work is also more reliable, simultaneously because all there are two pencil hook parts 343 on every hook body 341, make things convenient for more pencil like this to select nearby pencil hook part 343 to wind when the wire winding, thereby satisfy the wire winding requirement of the bigger motor of power.

Preferably, the distance between the back-side groove surface 345 and the front-side groove surface 346 is greater than the diameter of one wire harness and smaller than the diameter of two wire harnesses. Therefore, the wiring harness can conveniently enter the wire hooking groove during winding, and meanwhile, the condition that the wiring harness cannot cross is ensured. The harness hook 343 is provided with a flared guide 347 at the opening. The guide portion 347 can facilitate the wiring harness to better enter the hooking groove during winding.

In this embodiment, as shown in fig. 4 and 5, the front insulating end cap 33 is a split structure, the front insulating end cap 33 includes a middle phase ring 331 and a plurality of front tooth end cap portions located outside the middle phase ring 331, and the inner ends of the plurality of front tooth end cap portions are connected with a connecting ring, the front tooth end cap portions and the middle phase ring 331 are split structures, so as to facilitate separate molding, the front tooth end cap portions are fixed on the front sides of the teeth of the stator core 31 in a one-to-one correspondence manner, the middle phase ring 331 is fixed in the middle of the stator core 31, the metal hook 34 is fixed on the middle phase ring 331 in an insertion manner, wherein the metal hook 34 is provided with an insertion pin 342 inserted into the middle phase ring 331, the middle phase ring 331 is also provided with a plurality of insertion pins for being inserted into the hole of the stator core 31, the outer side and the inner side of the front tooth end cap portions are respectively provided with a front outer positioning protrusion 332 and a front inner positioning protrusion 333, the back insulating end cover 35 includes a middle insulating ring portion and a plurality of back tooth end cover portions connected to the outer side of the middle insulating ring portion, a back outer positioning protrusion 2111 and a back inner positioning protrusion 2111 are respectively provided on the outer side and the inner side of each back tooth end cover portion, the back outer positioning protrusion 2111 and the front outer positioning protrusion 332 jointly constrain the outer end of the wire harness winding, and the back inner positioning protrusion 2111 and the front inner positioning protrusion 333 jointly constrain the inner end of the wire harness winding. Therefore, the wire harness can be wound on the back tooth end cover part and the front tooth end cover part in a better restrained manner in the winding process, and the wire harness is tidier

The above-mentioned embodiments are merely descriptions of the preferred embodiments of the present invention, and are not intended to limit the scope of the present invention, and various modifications and alterations made to the technical solution of the present invention without departing from the spirit of the present invention are intended to fall within the scope of the present invention defined by the claims.

Claims

1. The utility model provides an external rotor electric machine is used in driving of automobile cooling fan, includes the controller subassembly, the controller subassembly includes the shell of compriseing radiating seat and rear end cap, be provided with electrically conductive support and PCBA board in the shell, the front of radiating seat is provided with the center pin, armature assembly is installed in the front of radiating seat, the center pin rotates and installs the external rotor assembly, be provided with inductance installing zone, electrically conductive support installing zone, pencil joint area and heat conduction platform on the radiating seat, electrically conductive support places in electrically conductive support installing zone, is provided with the inductance in the inductance installing zone, and pencil joint area is provided with pencil electrically conductive pin, inductance and pencil electrically conductive pin all with PCBA board on the electrically conductive hole welding that corresponds fixed its characterized in that: the utility model discloses a heat sink, including the heat dissipation seat, be provided with three through hole in the electrically conductive support installation region, electrically conductive support includes three installation hole portion, and the periphery of this installation hole portion is provided with semi-enclosed terminal guard portion, is connected through the connecting rod between this terminal guard portion and the installation hole portion, and the back of this connecting rod is provided with the location caulking groove that both ends extend to terminal guard portion and installation hole portion respectively, installs a conductive connecting rod on every installation hole portion respectively, the one end of conductive connecting rod inserts corresponding installation hole portion and wears out from the through hole, in the location caulking groove that the middle part embedding of conductive connecting rod corresponds, the tail end of conductive connecting rod is connecting terminal and is in the terminal guard portion that corresponds, and this connecting terminal inserts on the PCBA board to electrically conductive hole welded fastening, electrically conductive connecting rod is connected armature assembly and PCBA board electricity.

2. An outer rotor motor for driving a cooling fan of an automobile according to claim 1, wherein: the armature assembly comprises a stator core, a back side insulating end cover and a front side insulating end cover, wherein the back side insulating end cover and the front side insulating end cover are respectively fixed at the back side end and the front side end of the stator core; the metal protection hook comprises a protection hook body fixed with a front insulating end cover in a plug-in mounting mode, a connecting rod hook portion convenient to correspond and inserted into a conductive connecting rod is arranged on each protection hook body, two wire harness hook portions are further arranged on each protection hook body, a hook line groove convenient for a wire harness to stride across is formed in each wire harness hook portion, each hook line groove comprises a back side groove face, a front side groove face and a connecting arc face connecting the back side groove face and the front side groove face, included angles between the back side groove face and the front side groove face and an axial lead of a stator core are 85-90 degrees, and an opening of each hook line groove faces to the center of the stator core.

3. An outer rotor motor for driving a cooling fan of an automobile according to claim 2, wherein: the back side slot surface and the front side slot surface are parallel to each other and form an included angle of 90 degrees with the axial lead of the stator core.

4. An outer rotor motor for driving a cooling fan of an automobile according to claim 3, wherein: the distance between the back-side groove surface and the front-side groove surface is greater than the diameter of one wire harness and less than the diameter of two wire harnesses.

5. An outer rotor motor for driving a cooling fan of an automobile according to claim 4, wherein: and a flared guide part is arranged at the opening of the wire harness hook part.

6. An outer rotor motor for driving a cooling fan of an automobile according to claim 5, wherein: the front insulating end cover is of a split structure and comprises a middle phase ring and a plurality of front tooth end cover parts positioned outside the middle phase ring, the front tooth end cover parts are correspondingly fixed on the front sides of the tooth parts of the stator iron core one by one, the middle phase ring is fixed in the middle of the stator iron core, the metal protection hook is inserted and fixed on the middle phase ring, the outer side and the inner side of the front tooth end cover part are respectively provided with a front outer positioning bulge and a front inner positioning bulge, the back insulation end cover comprises a middle insulation ring part and a plurality of back tooth end cover parts connected with the outer side of the middle insulation ring part, the outer side and the inner side of each back tooth end cover part are respectively provided with a back outer positioning bulge and a back inner positioning bulge, the back outer positioning bulge and the front outer positioning bulge jointly restrain the outer side end of the wire harness winding, and the back inner positioning bulge and the front inner positioning bulge jointly restrain the inner side end of the wire harness winding.

7. An outer rotor motor for driving a cooling fan of an automobile according to any one of claims 1 to 6, wherein: the terminal protection part comprises a bottom protection plate part and a side protection plate part, the back of the bottom protection plate part is connected with the back of the connecting rod, and an avoidance notch corresponding to the connecting rod is arranged on the side protection plate.

8. An outer rotor motor for driving a cooling fan of an automobile according to claim 7, wherein: the middle of the three mounting hole parts is provided with a positioning ring part, the positioning ring part is respectively connected with the three mounting hole parts through connecting ribs, and a positioning boss inserted into the positioning ring part is correspondingly arranged on the conductive support mounting area.

9. An outer rotor motor for driving a cooling fan of an automobile according to claim 8, wherein: the conductive support mounting region is a sink groove region, the conductive support is mounted in the sink groove region, and a positioning sink groove region which is matched with the terminal protection part in a shape one-to-one correspondence mode is arranged on the conductive support mounting region.