CN219740050U

CN219740050U - Brushless direct current motor and cooking machine

Info

Publication number: CN219740050U
Application number: CN202320653003.XU
Authority: CN
Inventors: 郭峰; 张鹏
Original assignee: Guangdong Xinren Technology Co ltd
Current assignee: Guangdong Xinren Technology Co ltd
Priority date: 2023-03-28
Filing date: 2023-03-28
Publication date: 2023-09-22
Anticipated expiration: 2033-03-28

Abstract

The utility model relates to a brushless direct current motor and a cooking machine, comprising: the assembly seat comprises a stator limit seat and a rotor limit part, wherein the rotor limit part is arranged on the stator limit seat, the stator limit seat forms a first mounting cavity, the stator limit seat is provided with a first limit hole, the rotor limit part is positioned in the first mounting cavity, and the rotor limit part forms a second mounting cavity; the stator assembly is matched with the stator limiting seat; the rotor assembly is positioned on the rotor limiting part; the bearing assembly is sleeved on the rotor assembly and clamped with the rotor limiting part, and the bearing assembly is located in the second installation cavity. The assembly seat is provided with the stator limiting seat and the rotor limiting part to limit the stator assembly and the rotor assembly respectively, so that the installation accuracy is improved, and the brushless direct current motor is prevented from being displaced in the working process.

Description

Brushless direct current motor and cooking machine

Technical Field

The utility model relates to the technical field of motors, in particular to a brushless direct current motor and a cooking machine.

Background

The brushless DC motor is also called as a motor without a commutator, and the practical motor is in a brushless form, namely an AC squirrel-cage asynchronous motor, which is widely applied as early as the birth of the nineteenth century. Transistors have been produced in the middle of the last century, and a direct current brushless motor using a transistor commutation circuit to replace brushes and commutators has been developed. The electronic commutator replaces the mechanical commutator, and the direct current brushless motor has the characteristics of good speed regulation performance of the direct current motor, and the like, and has the advantages of simple structure, no commutation spark, reliable operation, easy maintenance and the like of the alternating current motor.

In order to ensure that the brushless motor operates properly at high speed and has a sufficient service life, it must be ensured that the internal components must have extremely high concentricity and concentricity after the production assembly is completed. The existing direct current brushless motor needs to nest and assemble a plurality of components in the production and manufacturing processes, has higher concentricity requirements on a motor shaft, a rotor iron core and a magnetic steel sheet, and is easy to generate small errors in the assembling process, so that the problems of higher assembling and processing difficulty, low assembling efficiency, lower product consistency and the like exist.

Disclosure of Invention

Based on this, it is necessary to provide a brushless direct current motor and cooking machine to the problem that the assembly efficiency is low that the brushless motor is big at the assembly degree of difficulty, and assembly demand precision is high.

A brushless dc motor comprising: the assembly seat comprises a stator limiting seat and a rotor limiting part, wherein the rotor limiting part is arranged on the stator limiting seat, the stator limiting seat forms a first installation cavity, the stator limiting seat is provided with a first limiting hole, the rotor limiting part is positioned in the first installation cavity, the rotor limiting part is formed with a second installation cavity, and the first installation cavity is communicated with the second installation cavity; the stator assembly is at least partially positioned in the first mounting cavity and is matched with the stator limiting seat; the rotor assembly is arranged on the rotor limiting part, is positioned on the inner side of the stator assembly, and is at least partially positioned in the second mounting cavity; the bearing assembly is sleeved on the rotor assembly, is clamped with the rotor limiting part and is positioned in the second mounting cavity; the circuit board is electrically connected with the stator assembly, the circuit board is provided with a second limiting hole, the first limiting hole and the second limiting hole are oppositely arranged, and the circuit board is matched with the first limiting hole through the second limiting hole and is arranged on the stator limiting seat.

The application discloses a brushless direct current motor, which is characterized in that a stator limit seat is arranged on an assembly seat, a first mounting cavity of the stator limit seat is used for being mounted in an adapting way with a stator assembly, a second mounting cavity is formed on the inner side wall of a rotor limit part, a bearing assembly is sleeved on the rotor assembly, and the rotor assembly is clamped with the rotor limit part through the bearing assembly and is arranged on the rotor limit part. The assembly seat is used for limiting the stator assembly and the rotor assembly through the stator limiting seat and the rotor limiting part, the installation accuracy is improved, the brushless direct current motor is prevented from being displaced in the working process, the bearing assembly is sleeved on the rotor assembly in the installation process, the rotor assembly is assembled through clamping with the rotor limiting part, the stator assembly is installed in a matched mode with the first installation cavity of the stator limiting seat, and the circuit board is fixed to the assembly seat through the fixing piece after being matched with the first limiting hole and the second limiting hole. When the circuit board is electrified, the stator assembly generates a rotating magnetic field, and the permanent magnet of the rotor assembly is influenced by the magnetic field to rotationally cut magnetic lines of force, so that the magnetic lines of force are converted into mechanical energy and output. In the assembly process, the assembly process is simple, quick installation is realized, the production efficiency is improved, the installation accuracy between the stator assembly and the rotor assembly is improved by improving the assembly structure of the motor inner assembly, and the noise of the motor in the working process is further reduced.

In one embodiment, the stator limiting seat comprises a shell component and a positioning convex rib, the shell component forms the first installation cavity, the positioning convex rib is arranged on the side wall of the shell component, the positioning convex rib is positioned in the first installation cavity, the stator component is provided with a limiting groove, the positioning convex rib is in fit with the limiting groove, the rotor limiting part is arranged on the shell component, and the rotor limiting part is positioned at the center of the shell component. Through being equipped with the protruding muscle of location on the inside wall of casing subassembly, be formed with the spacing groove with the protruding muscle looks adaptation of location on two stator module, when installing stator module at the spacing seat of stator, pack into first installation cavity after corresponding the block with the recess of stator module and the protruding muscle of location, in order to realize the quick installation between stator module and the spacing seat of stator, and this mounting structure is simple and reliable, can effectively prevent that stator module from moving for the assembly seat in the high-speed operation of motor, and the spacing position department of rotor is located the center of casing subassembly, be favorable to stator module and rotor module to keep higher concentricity after the installation, reduce the error that produces in the assembly process, effectively avoid the motor to produce great noise in the course of working.

Preferably, the number of the positioning ribs is a plurality, and the plurality of positioning ribs are distributed on the inner side wall of the shell assembly.

In one embodiment, the housing assembly comprises a housing body, a first radial limiting portion and a first axial limiting portion, the first axial limiting portion is arranged on the housing body, one end of the first axial limiting portion forms a stator supporting surface, the stator assembly is located on the stator supporting surface, the number of the first radial limiting portions is multiple, the first radial limiting portions are distributed on the inner peripheral wall of the housing body at intervals, the first radial limiting portions are located between the inner side wall of the housing body and the outer side wall of the stator assembly, the outer side wall of the stator assembly abuts against the radial limiting portions, and the positioning ribs are arranged on one end of the radial limiting portions, which is close to the stator assembly. The stator assembly is axially positioned by the first axial limiting part, so that the axial assembly error of the stator assembly is compensated, the axial precision of the motor is improved, the stator supporting surface is formed towards the opening of the shell body by the first axial limiting part, the stator assembly is installed towards the first installation cavity according to the position of the positioning convex rib and the position of the limiting groove in the process of installing the stator assembly, and the stator assembly and the stator supporting surface are propped against each other to complete the process of installing the stator. Radial orientation is carried out to stator module through being equipped with first radial spacing portion, and first radial spacing portion distributes on the inside wall of casing body, and first radial spacing portion offsets with stator module's lateral wall, avoids stator module to take place to remove for the assembly seat in the high-speed operation of motor, has compensatied stator module's radial assembly error, and on the other hand can also improve stator module's radial installation accuracy, reduces assembly error.

The number of the first radial limiting parts is multiple, the first radial limiting parts are distributed at intervals along the inner peripheral wall of the shell body, and the first radial limiting parts are located on the supporting surface of the axial limiting parts.

In one embodiment, the rotor limiting portion comprises a second radial limiting portion and a second radial limiting portion, the second radial limiting portion is arranged on the bottom wall of the stator limiting seat, the second radial limiting portion forms the second installation cavity, the second radial limiting portion is arranged on the inner side wall of the second radial limiting portion, the second radial limiting portion forms a first bearing supporting surface, the bearing assembly comprises a first bearing, the rotor assembly is provided with an output shaft, the first bearing is sleeved on the output shaft, the output shaft penetrates through one end of the first bearing to extend into the second installation cavity, the inner side wall of the second radial limiting portion abuts against the outer peripheral wall of the first bearing, and the first bearing is arranged on the first bearing supporting surface. Through being equipped with radial spacing portion of second on the inside wall of the radial spacing portion of second, be formed with first bearing supporting surface on the one side that the radial spacing portion of second is close to the second installation cavity, first bearing supporting surface is used for spacing to first bearing, first bearing housing is established rotor subassembly and is offseted through first bearing and first bearing supporting surface on rotor subassembly, and the radial spacing portion of second is located one side of second installation cavity open-ended and carries out further support spacing with rotor subassembly, this structure enables rotor subassembly and bearing subassembly and assembles in place, and keep rotor subassembly and stator subassembly to keep higher concentricity, avoid motor operation unusual.

In one embodiment, the rotor assembly comprises a rotor core, a permanent magnet and an output shaft, the rotor core is arranged at one end of the output shaft, the permanent magnet is arranged on the rotor core, the first bearing is sleeved on one end of the output shaft, which is close to the rotor core, and the output shaft penetrates through one end of the first bearing and extends into the second mounting cavity. Through be equipped with first bearing on the one end that the output shaft is close to rotor core, on the one hand make the rotor subassembly assemble more firmly on the mount pad, on the other hand bearing can reduce friction for the rotor subassembly can steady rotation, first bearing subassembly is located the second installation intracavity and carries out the adaptation block with the radial spacing portion of second, makes the overall structure of motor compacter, and the axle center coincidence of the axle center of first bearing subassembly and the axle center of rotor spacing portion, improves the concentricity of the inside subassembly of motor.

In one embodiment, the device further comprises a clamp spring assembly, a clamp spring groove is formed in the peripheral wall of the output shaft, the clamp spring assembly is matched with the clamp spring groove, and one side of the clamp spring assembly is adjacent to the bearing assembly. The output shaft is provided with the jump ring groove with jump ring subassembly looks adaptation for the jump ring subassembly is located between first bearing and the rotor core, at the in-process of installation, through being equipped with the jump ring subassembly, can effectively offset the tolerance between each part during the motor assembly, improves the assembly precision between bearing assembly, output shaft and the spacing portion of rotor, makes convenient assembly, raises the efficiency.

In one embodiment, a fourth mounting cavity is formed between one end, far away from the stator assembly, of the second radial limiting portion and the second axial limiting portion, the first bearing supporting surface and the second bearing supporting surface are formed on two opposite sides of the second axial limiting portion respectively, the bearing assembly further comprises a second bearing, the output shaft sequentially penetrates through the second mounting cavity and the fourth mounting cavity, the second bearing is sleeved on the output shaft and is located in the fourth mounting cavity, the end face of the second bearing abuts against the second bearing supporting surface, and the outer peripheral wall of the second bearing abuts against the side wall of the fourth mounting cavity. In order to carry out more accurate spacing to the rotor subassembly, reduce the assembly error of rotor subassembly, be formed with the third installation cavity that runs through and fourth installation cavity on the second radial spacing portion of assembly seat, the lateral wall in third installation cavity and fourth installation cavity offsets with first bearing and second bearing's surface respectively, thereby carry out radial spacing to first bearing and second bearing, furthermore, the both sides of second axial spacing portion form first bearing holding surface and second bearing holding surface respectively and be used for carrying out axial spacing to first bearing and second bearing, and the one side that the output shaft of rotor subassembly is close to stator subassembly is equipped with first bearing through the cover and sets up on the assembly seat, one side cover that the output shaft passed fourth installation cavity is equipped with the second bearing, on the one hand through two bearings and rotor spacing portion looks adaptation make the holistic spare part of motor keep higher concentricity, assembly stability has been improved, on the other hand has improved the mechanical output performance of motor.

Further, a clamp spring assembly is arranged between the first bearing and the output shaft and between the second bearing and the output shaft respectively, so that the assembly precision is improved, and the assembly error is reduced.

In one embodiment, the motor further comprises a reduction gearbox assembly, a third installation cavity is formed on one side, far away from the stator assembly, of the stator limiting seat, the third installation cavity is communicated with the second installation cavity, the reduction gearbox assembly is arranged on the stator limiting seat, the reduction gearbox assembly is at least partially located in the third installation cavity, the rotor assembly is connected with the reduction gearbox assembly, and the rotor assembly extends to the third installation cavity. The stator limiting seat is far away from the third installation cavity on the opposite side of the stator assembly, the third installation cavity is used for being matched with the reduction gearbox assembly, so that the rotor assembly, the stator assembly and the reduction gearbox assembly are integrally arranged on the assembly seat, the integration degree and the space utilization rate of the motor are improved, the reduction gearbox assembly is used for being connected with an output shaft of the rotor assembly, the reduction gearbox can adjust the rotation speed of the output shaft, the reduction gearbox assembly is assembled at the other end of the stator limiting seat, the motor can be adjusted according to the size of a load, the adaptability to an assembled product is strong, the operation is more stable, and the noise is low.

In one embodiment, the motor further comprises an output gear, the rotor assembly comprises a rotor iron core, a permanent magnet and an output shaft, the permanent magnet is arranged on the rotor iron core, the rotor iron core is arranged at one end of the output shaft, one end, far away from the rotor iron core, of the output shaft is matched with the output gear, the output gear is meshed with the reduction gearbox assembly, and the output shaft is used for driving the output gear to rotate. The one end that rotor subassembly is close to rotor core overlaps earlier and is equipped with first bearing assembly and sets up on rotor spacing portion, and the second radial spacing portion one end that is equipped with on the rotor spacing portion is overlapped again to the output shaft, extends to third installation cavity part and again with output gear looks adaptation after the output shaft passes the second installation cavity, and output gear meshes with the reducing gear box to transmit rotor assembly's mechanical energy, make the connection between output shaft and the mechanical transmission part of application product more reliable and more convenient and fast.

In one embodiment, the stator limiting seat is provided with a connecting portion, one end of the connecting portion is provided with the first limiting hole, and the other end of the connecting portion is connected with the reduction gearbox assembly. Through being equipped with connecting portion on the spacing seat of stator, the one end of connecting portion is equipped with spacing hole and is used for being connected with the circuit board, is that the circuit board is fixed on the spacing seat of stator, and the other end and the reducing gear box subassembly of connecting portion are connected for the reducing gear box is fixed on the spacing seat of stator, accomplishes brushless DC motor's integral erection from this.

In one embodiment, the stator assembly comprises a stator framework assembly, a stator core and a stator coil, the stator framework assembly is arranged on the stator limiting seat, the stator framework assembly is provided with a coil accommodating groove, the stator core is arranged on the stator framework assembly, the limiting cavity is located on the inner side of the stator core, the stator limiting seat is provided with a stator supporting surface, the stator core is located on the stator supporting surface, the stator core is provided with a limiting groove, the inner side wall of the stator limiting seat is provided with a positioning convex rib and is matched with the limiting groove, the stator coil is connected with the circuit board, and the stator coil is located in the coil accommodating groove. The stator skeleton subassembly is used for fixed stator core and stator coil, be equipped with the spacing on the stator skeleton subassembly, stator core and spacing looks adaptation installation, avoid stator core to take place the displacement after the motor circular telegram, be formed with the stator holding surface on the spacing seat of stator, this stator holding surface is towards the installation opening part of the spacing seat of stator for stator core can place on the stator holding surface, form the location protruding muscle with the spacing seat looks adaptation block of stator on stator core's the lateral wall, it is spacing to further carry out stator core, this mounting structure has realized the quick installation of motor, and improved the installation accuracy, the motor is stable to use can be good.

In one embodiment, the stator frame assembly includes a first frame and a second frame, the first frame is disposed on the second frame, the first frame is formed with a first coil-receiving slot, the second frame is formed with a second coil-receiving slot, the first coil-receiving slot is in communication with the second coil-receiving slot, and the stator core is disposed between the first frame and the second frame. The stator skeleton subassembly is established between first skeleton and second skeleton by first skeleton and second skeleton subassembly, stator core cover, further improve stator core's assembly precision and accuracy, first skeleton and second skeleton are formed with first coil holding tank and the second coil holding tank that holds stator coil respectively, in the installation, establish stator core cover on the second skeleton earlier, again with first skeleton setting on the second skeleton, further fix stator core, after first coil holding tank and second coil holding tank part overlap, stator coil sets up in first coil holding tank and extends to in the second coil holding tank.

In one embodiment, the motor further comprises a Hall sensing assembly, wherein the Hall sensing assembly is arranged on the circuit board, the stator assembly is provided with a wire inlet groove, and the Hall sensing assembly is at least partially positioned in the wire inlet groove.

A second aspect of the present application discloses a food processor comprising: any one of the above brushless dc motors; the brushless direct current motor is positioned in the accommodating cavity; and the stirring assembly is connected with the brushless direct current motor, and the brushless direct current motor drives the stirring assembly to rotate.

Through being applied to the cooking machine with brushless DC motor, the brushless DC motor that forms through above-mentioned assembly structure assembly noise is little in the use, and the stability of motor can be good, and through installing rotor subassembly, stator module, circuit board and reducing gear box subassembly integration on the mount pad, the structure of its motor is compacter, occupation space is little, makes it possess better product adaptability.

Drawings

Fig. 1 is a schematic diagram of the whole machine of a brushless dc motor;

FIG. 2 is an exploded view of the whole machine of the brushless DC motor;

fig. 3 is a sectional view of the whole machine of the brushless dc motor;

FIG. 4 is a first visual schematic of the mount;

FIG. 5 is a second visual schematic of the mount;

FIG. 6 is a cross-sectional view of the mount;

FIG. 7 is an exploded view of the stator assembly;

fig. 8 is an exploded view of the rotor assembly.

Wherein, the correspondence between the reference numerals and the component names is:

the assembly seat, the first mounting cavity, the first limiting hole, the second mounting cavity, the third mounting cavity, the first bearing supporting surface, the second bearing supporting surface, the 107 stator supporting surface, the fourth mounting cavity, the 11 stator limiting seat, the 111 shell component, the 1111 shell body, the 1112 first radial limiting part, the 1113 first axial limiting part, the 112 positioning convex rib, the 113 connecting part, the 12 rotor limiting part, the 121 second radial limiting part and the 122 second axial limiting part are arranged in the assembly seat, the 101 first mounting cavity, the 102 first limiting hole, the 103 second mounting cavity, the 104 third mounting cavity, the 105 first bearing supporting surface, the 106 second bearing supporting surface, the 107 stator supporting surface, the 108 fourth mounting cavity;

2 stator components, 201 limit grooves, 202 first coil accommodating grooves, 203 second coil accommodating grooves, 21 stator framework components, 211 first frameworks, 212 second frameworks, 22 stator cores and 23 stator coils;

3 rotor components, 301 snap spring grooves, 31 rotor cores, 32 permanent magnets and 33 output shafts;

41 first bearings, 42 second bearings;

5 a circuit board;

6, a reduction gearbox assembly;

7, a clamp spring assembly;

8, outputting a gear;

and 9, a Hall sensing assembly.

Detailed Description

In order that the above-recited objects, features and advantages of the present application will be more clearly understood, a more particular description of the application will be rendered by reference to the appended drawings and appended detailed description. It should be noted that, without conflict, the embodiments of the present application and features in the embodiments may be combined with each other.

In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention, however, the present invention may be practiced in other ways than those described herein, and therefore the scope of the present invention is not limited to the specific embodiments disclosed below.

The following describes a brushless dc motor and a food processing machine according to some embodiments of the present invention with reference to the accompanying drawings.

Example 1

As shown in fig. 1 to 8, a brushless dc motor includes: the assembly seat 1, the assembly seat 1 comprises a stator limit seat 11 and a rotor limit part 12, the rotor limit part 12 is arranged on the stator limit seat 11, the stator limit seat 11 forms a first installation cavity 101, the stator limit seat 11 is provided with a first limit hole 102, the rotor limit part 12 is positioned in the first installation cavity 101, the rotor limit part 12 forms a second installation cavity 103, and the first installation cavity 101 is communicated with the second installation cavity 103; the stator assembly 2 is at least partially positioned in the first mounting cavity 101, and the stator assembly 2 is matched with the stator limit seat 11; the rotor assembly 3, the rotor assembly 3 is set up on the rotor limit part 12, the rotor assembly 3 locates at the inboard of the stator assembly 2, the rotor assembly 3 locates at least partially in the second installation cavity; the bearing assembly is sleeved on the rotor assembly 3, is clamped with the rotor limiting part 12 and is positioned in the second mounting cavity 103; the circuit board 5, circuit board 5 and stator module 2 electricity are connected, and circuit board 5 is equipped with the spacing hole of second, and first spacing hole 102 sets up with the spacing hole of second relatively, and circuit board 5 passes through the spacing seat 11 of second spacing hole setting at the stator.

The application discloses a brushless direct current motor, which is characterized in that a stator limit seat 11 is arranged on an assembly seat 1, a first mounting cavity 101 of the stator limit seat 11 is used for being mounted in an adaptive manner with a stator assembly 2, a second mounting cavity 103 is formed on the inner side wall of a rotor limit part 12, a bearing assembly is sleeved on a rotor assembly 3, and the rotor assembly 3 is arranged on the rotor limit part 12 in a clamping manner with the rotor limit part 12 through the bearing assembly. The assembly seat 1 is provided with the stator limiting seat 11 and the rotor limiting part 12 to limit the stator assembly 2 and the rotor assembly 3 respectively, so that the installation accuracy is improved, the brushless direct current motor is prevented from being displaced in the working process, the bearing assembly is sleeved on the rotor assembly 3 in the installation process, the rotor assembly 3 is assembled by being clamped with the rotor limiting part 12, the stator assembly 2 and the first installation cavity 101 of the stator limiting seat 11 are installed in an adapting mode, and the circuit board 5 is fixed on the assembly seat 1 through a fixing piece after being matched with the first limiting hole and the second limiting hole. When the circuit board 5 is electrified, the stator assembly 2 generates a rotating magnetic field, and the permanent magnet 32 of the rotor assembly 3 is influenced by the magnetic field to rotationally cut magnetic lines of force, so that the magnetic lines of force are converted into mechanical energy and output. In the assembly process, the assembly process is simple, quick installation is realized, the production efficiency is improved, the installation accuracy between the stator assembly 2 and the rotor assembly 3 is improved by improving the assembly structure of the motor inner assembly, and the noise of the motor in the working process is further reduced.

As shown in fig. 3 to 6, this embodiment further defines, in addition to the features of the above-described embodiment: the stator limit seat 11 comprises a shell component 111 and a positioning convex rib 112, the shell component 111 forms a first installation cavity 101, the positioning convex rib 112 is arranged on the side wall of the shell component 111, the positioning convex rib 112 is positioned in the first installation cavity 101, the stator component 2 is formed with a limit groove 201, the positioning convex rib 112 is clamped with the limit groove 201 in a matching manner, the rotor limit part 12 is arranged on the shell component 111, and the rotor limit part 12 is positioned at the center of the shell component 111. Through being equipped with location protruding muscle 112 on the inside wall of casing subassembly 111, be formed with on two stator module 2 with the spacing groove 201 of location protruding muscle 112 looks adaptation, when installing stator module 2 at stator spacing seat 11, pack into first installation cavity 101 after the recess with stator module 2 corresponds the block with location protruding muscle 112, in order to realize the quick installation between stator module 2 and the stator spacing seat 11, and this mounting structure is simple reliable, can effectively prevent that stator module 2 from taking place to remove for assembly seat 1 in the high-speed operation of motor, and rotor spacing portion 12 is located the center department of casing subassembly 111, be favorable to stator module 2 and rotor module 3 to keep higher concentricity after the installation, reduce the error that produces in the assembly process, effectively avoid the motor to produce great noise in the course of the work.

Preferably, the number of the positioning ribs 112 is plural, and the plural positioning ribs 112 are distributed on the inner side wall of the housing assembly 111.

As shown in fig. 4 and 6, this embodiment further defines, in addition to the features of the above-described embodiment: the casing assembly 111 includes casing body 1111, first radial spacing portion 1112 and first axial spacing portion 1113, first axial spacing portion 1113 sets up on casing body 1111, the one end of first axial spacing portion 1113 forms stator holding surface 107, stator assembly 2 is located stator holding surface 107, first radial spacing portion 1112 distributes on the interior perisporium of casing body 1111, first radial spacing portion 1112 is located between the inside wall of casing body 1111 and the lateral wall of stator assembly 2, the lateral wall of stator assembly 2 offsets with first radial spacing portion 1112, location bead 112 sets up on the one end that first radial spacing portion 1112 is close to stator assembly. The stator assembly 2 is axially positioned by the first axial limiting part 1113, so that the axial assembly error of the stator assembly 2 is compensated, the axial precision of the motor is improved, the stator supporting surface 107 is formed towards the opening of the shell body by the first axial limiting part 1113, the stator assembly 2 is installed towards the first installation cavity 101 according to the position where the positioning convex rib 112 is matched with the limiting groove 201 in the process of installing the stator assembly 2, and the stator assembly 2 is abutted against the stator supporting surface 107 to finish the process of installing the stator. Through being equipped with first radial spacing portion 1112 and carrying out radial orientation to stator module 2, first radial spacing portion 1112 distributes on the inside wall of casing body 1111, and first radial spacing portion 1112 offsets with stator module 2's lateral wall, avoids stator module 2 to take place to remove for assembly seat 1 in the high-speed operation of motor, has compensatied stator module 2's radial assembly error, and on the other hand can also improve stator module 2's radial installation accuracy, reduces assembly error.

The number of the first radial limiting portions 1112 is plural, the plurality of first radial limiting portions 1112 are distributed at intervals along the inner peripheral wall of the housing body 1111, and the first radial limiting portions 1112 are located on the supporting surface of the first axial limiting portion 1113.

As shown in fig. 3, 4 and 6, this embodiment further defines, in addition to the features of the above-described embodiment: the rotor limiting portion 12 comprises a second radial limiting portion 121 and a second axial limiting portion 122, the second radial limiting portion 121 is arranged on the bottom wall of the stator limiting seat 11, the second axial limiting portion 122 is arranged on the inner side wall of the second radial limiting portion 121, a second mounting cavity 103 is formed between one end, close to the stator assembly 2, of the second radial limiting portion 121 and the second axial limiting portion 122, the second axial limiting portion 122 forms a first bearing supporting surface 105, the bearing assembly comprises a first bearing 41, the rotor assembly 3 is provided with an output shaft 33, the first bearing 41 is sleeved on the output shaft 33, the output shaft 33 penetrates through one end of the first bearing 41 to extend into the second mounting cavity 103, the inner side wall of the second radial limiting portion 121 abuts against the outer peripheral wall of the first bearing 41, and the first bearing 41 is located on the first bearing supporting surface 105. In order to axially limit the rotor assembly 3, a second axial limit portion 122 is provided on an inner side wall of the second radial limit portion 121, a first bearing support surface 105 is formed on one side of the second axial limit portion 122, which is close to the second mounting cavity 103, for limiting the first bearing assembly 41, the first bearing 41 is sleeved on the rotor assembly 3, and the first bearing 41 abuts against the first bearing support surface 105, so that the rotor assembly 3 is mounted on the mounting seat 1 to axially limit. The size of the second installation cavity 103 formed in the second radial limiting part 121 is matched with that of the first bearing 41, so that the outer peripheral wall of the first bearing 41 is propped against the inner side wall of the second radial limiting part 121, the first bearing assembly 41 is radially limited, the first bearing 41 is sleeved on the output shaft of the rotor assembly 3 and then is installed with the rotor limiting part 12 in an matched mode, the rotor assembly 3 and the bearing assembly can be assembled in place through the structure, the rotor assembly 3 and the stator assembly 2 are kept at high concentricity, and abnormal motor operation is avoided.

As shown in fig. 2 and 8, this embodiment further defines, in addition to the features of the above-described embodiment: the rotor assembly 3 includes a rotor core 31, a permanent magnet 32 and an output shaft 33, the rotor core 31 is disposed on one end of the output shaft 33, the permanent magnet 32 is disposed on the rotor core 31, a first bearing 41 is sleeved on one end of the output shaft 33 close to the rotor core 31, and the output shaft 33 extends into the second mounting cavity 103 through one end of the first bearing 41. Through being equipped with first bearing 41 on the one end that output shaft 33 is close to rotor core 31, on the one hand make rotor subassembly 3 can assemble more firmly on assembly seat 1, on the other hand bearing can reduce friction for rotor subassembly 3 can steady rotation, first bearing 41 subassembly 4 is located second installation cavity 103 and carries out the adaptation block with the radial spacing portion 122 of second, make the overall structure of motor compacter, and the axle center of first bearing 41 subassembly 4 coincides with the axle center of rotor spacing portion 12, improve the concentricity of the inside subassembly of motor.

In addition to the features of the above embodiments, the present embodiment further defines: still include jump ring subassembly 7, be formed with jump ring groove 301 on the periphery wall of output shaft 33, jump ring subassembly 7 and jump ring groove 301 looks adaptation, one side and the bearing assembly of jump ring subassembly 7 are adjacent. The output shaft 33 is provided with the clamp spring groove 301 matched with the clamp spring assembly 7, so that the clamp spring assembly 7 is located between the first bearing 41 and the rotor core 31, tolerance among all parts can be effectively counteracted during motor assembly by being provided with the clamp spring assembly 7 in the installation process, assembly precision among the bearing assembly, the output shaft 33 and the rotor limiting part 12 is improved, assembly is convenient, and efficiency is improved.

In addition to the features of the above embodiments, the present embodiment further defines: a fourth mounting cavity 108 is formed between one end of the second radial limiting portion 121, which is far away from the stator assembly 2, and the second axial limiting portion 122, and a first bearing supporting surface 105 and a second bearing supporting surface 106 are respectively formed on two opposite sides of the second axial limiting portion 122, the bearing assembly further comprises a second bearing 42, the output shaft 33 sequentially penetrates through the second mounting cavity 103 and the fourth mounting cavity 108, the second bearing 42 is sleeved on the output shaft 33 and is located in the fourth mounting cavity 108, the end face of the second bearing 42 abuts against the second bearing supporting surface 106, and the outer peripheral wall of the second bearing 42 abuts against the side wall of the fourth mounting cavity 108. In order to more precisely limit the rotor assembly 3 and reduce the assembly error of the rotor assembly 3, a third mounting cavity 104 and a fourth mounting cavity 108 penetrating through the second radial limit part 122 of the assembly seat 1 are formed, the side walls of the third mounting cavity 104 and the fourth mounting cavity 108 are respectively propped against the outer surfaces of the first bearing 41 and the second bearing 42, so that the first bearing 41 and the second bearing 42 are radially limited, further, a first bearing supporting surface 105 and a second bearing supporting surface 106 are respectively formed on two sides of the second radial limit part 122 and are used for axially limiting the first bearing 41 and the second bearing 42, a first bearing 41 is sleeved on one side, close to the stator assembly 2, of the output shaft 33 of the rotor assembly 3 is arranged on the assembly seat 1, a second bearing 42 is sleeved on one side, penetrating through the fourth mounting cavity 108, of the output shaft 33 is matched with the rotor limit part 12, so that the whole part of the motor keeps higher concentricity, the assembly stability is improved, the assembly error is reduced, and the mechanical output performance of the motor is improved.

Further, the clamp spring assembly 7 is arranged between the first bearing 41 and the second bearing 42 and the output shaft 33 respectively, so that the assembly precision is improved, and the assembly error is reduced.

As shown in fig. 2 and 5, this embodiment further defines, in addition to the features of the above-described embodiment: still include reducing gear box subassembly 6, one side that stator spacing seat 11 kept away from stator subassembly 2 forms third installation cavity 104, and third installation cavity 104 communicates with second installation cavity 103, and reducing gear box subassembly 6 sets up on stator spacing seat 11, and reducing gear box subassembly 6 is located third installation cavity 104 at least partially, and rotor subassembly 3 is connected with reducing gear box subassembly 6, and rotor subassembly 3 extends to in the third installation cavity 104. The stator spacing seat 11 is kept away from and is equipped with the third installation cavity 104 on the opposite side of stator module 2, the third installation cavity 104 is used for carrying out the adaptation with reduction gearbox assembly 6 for rotor subassembly 3, stator module 2 and reduction gearbox assembly 6 are integrated to be set up on assembly seat 1, improve the integrated degree and the space utilization of motor, reduction gearbox assembly 6 is used for being connected with the output shaft 33 of rotor subassembly 3, the reduction gearbox can adjust the rotation speed of output shaft 33, assemble reduction gearbox assembly 6 on the other end of stator spacing seat 11, make the motor can adjust according to the size of load, strong adaptability to the assembled product, and the operation is more steady, the noise is low.

As shown in fig. 2 and 3, this embodiment further defines, in addition to the features of the above-described embodiment: still include output gear 8, rotor subassembly 3 includes rotor core 31, permanent magnet 32 and output shaft 33, and permanent magnet 32 sets up on rotor core 31, and rotor core 31 sets up on one end of output shaft 33, and the one end that rotor core 31 was kept away from to output shaft 33 is with output gear 8 looks adaptation, and output gear 8 meshes with reduction gearbox assembly 6, and output shaft 33 is used for driving output gear 8 rotation. The rotor subassembly 3 is close to rotor core 31's one end cover earlier and is equipped with first bearing 41 subassembly 4 and sets up on rotor spacing portion 12, and the second bearing 42 is established to the cover again to the second radial spacing portion 122 one end that is equipped with on the rotor spacing portion 12 of output shaft 33, and the output shaft 33 extends to the third installation cavity 104 part after passing second installation cavity 103 again with output gear 8 looks adaptation, output gear 8 meshes with the reducing gear box to transmit rotor subassembly 3's mechanical energy, make the connection between output shaft 33 and the mechanical transmission part of application product more reliable and more convenient and fast, and the assembly.

In addition to the features of the above embodiments, the present embodiment further defines: the stator limit seat 11 is provided with a connecting part 113, one end of the connecting part 113 is provided with a first limit hole 102, and the other end of the connecting part 113 is connected with the reduction gearbox assembly 6. Through being equipped with connecting portion 113 on the spacing seat of stator 11, the one end of connecting portion 113 is equipped with spacing hole and is used for being connected with circuit board 5, is circuit board 5 fixed on the spacing seat of stator 11, and the other end of connecting portion 113 is connected with reduction gearbox subassembly 6 for the reduction gearbox is fixed on the spacing seat of stator 11, accomplishes brushless DC motor's integral erection from this.

As shown in fig. 2, 3 and 7, this embodiment further defines, in addition to the features of the above-described embodiment: the stator assembly 2 comprises a stator framework assembly 21, a stator core 22 and a stator coil 23, wherein the stator framework assembly 21 is arranged on a stator limiting seat 11, a coil accommodating groove is formed in the stator framework assembly 21, the stator core 22 is arranged on the stator framework assembly 21, a limiting cavity is located on the inner side of the stator core, a stator supporting surface 107 is formed in the stator limiting seat 11, the stator core 22 is located on the stator supporting surface 107, a limiting groove 201 is formed in the stator core 22, a positioning convex rib 112 is arranged on the inner side wall of the stator limiting seat 11 and is matched with the limiting groove 201, the stator coil 23 is connected with the circuit board 5, and the stator coil 23 is located in the coil accommodating groove. The stator skeleton subassembly 21 is used for fixed stator core 22 and stator coil 23, be equipped with the spacing on the stator skeleton subassembly 21, stator core 22 and spacing looks adaptation installation, avoid stator core 22 to take place the displacement after the motor circular telegram, be formed with stator holding surface 107 on the spacing seat 11 of stator, this stator holding surface 107 is towards the installation opening part of the spacing seat 11 of stator for stator core 22 can place on stator holding surface 107, form the location bead 112 with the spacing seat 11 looks adaptation block of stator on the lateral wall of stator core 22, further spacing to stator core 22, this mounting structure has realized the quick installation of motor, and improved the installation accuracy, the motor stability in use can be good.

In addition to the features of the above embodiments, the present embodiment further defines: the stator frame assembly 21 includes a first frame 211 and a second frame 212, the first frame 211 is disposed on the second frame 212, the first frame 211 is formed with a first coil accommodating groove 202, the second frame 212 is formed with a second coil accommodating groove 203, the first coil accommodating groove 202 communicates with the second coil accommodating groove 203, and the stator core 22 is located between the first frame 211 and the second frame 212. The stator frame assembly 21 is formed by a first frame 211 and a second frame assembly 212, the stator core 22 is sleeved between the first frame 211 and the second frame 212, the assembly precision and accuracy of the stator core 22 are further improved, the first frame 211 and the second frame 212 are respectively provided with a first coil accommodating groove 202 and a second coil accommodating groove 203 for accommodating the stator coil 23, in the installation process, the stator core 22 is sleeved on the second frame 212 first, then the first frame 211 is arranged on the second frame 212, the stator core 22 is further fixed, and after the first coil accommodating groove 202 and the second coil accommodating groove 203 are partially overlapped, the stator coil 23 is arranged in the first coil accommodating groove 202 and extends into the second coil accommodating groove 203.

Still include hall sensing assembly 9, hall sensing assembly 9 sets up on circuit board 5, and stator module 2 is equipped with the wire casing, and hall sensing assembly 9 is located the wire casing at least partially.

Example 2

The embodiment discloses cooking machine includes: a brushless dc motor according to any one of the above; the shell assembly is provided with a containing cavity, and the brushless direct current motor is positioned in the containing cavity; the stirring assembly is connected with the brushless direct current motor, and the brushless direct current motor drives the stirring assembly to rotate. Through being applied to the cooking machine with brushless DC motor, the brushless DC motor that forms through above-mentioned assembly structure assembly noise is little in the use, and the stability of motor can be good, and through installing rotor subassembly 3, stator module 2, circuit board 5 and reducing gear box subassembly 6 integration on assembly seat 1, the structure of its motor is compacter, occupation space is little, makes it possess better product adaptability.

The technical features of the above-described embodiments may be arbitrarily combined, and all possible combinations of the technical features in the above-described embodiments are not described for brevity of description, however, as long as there is no contradiction between the combinations of the technical features, they should be considered as the scope of the description.

The above examples illustrate only a few embodiments of the utility model, which are described in detail and are not to be construed as limiting the scope of the utility model. It should be noted that it will be apparent to those skilled in the art that several variations and modifications can be made without departing from the spirit of the utility model, which are all within the scope of the utility model. Accordingly, the scope of protection of the present utility model is to be determined by the appended claims.

Claims

1. A brushless dc motor comprising:

the assembly seat (1), assembly seat (1) includes spacing seat of stator (11) and rotor spacing portion (12), rotor spacing portion (12) set up on spacing seat of stator (11), spacing seat of stator (11) forms first installation cavity (101), first spacing hole (102) have been seted up to spacing seat of stator (11), rotor spacing portion (12) are located in first installation cavity (101), rotor spacing portion (12) is formed with second installation cavity (103), first installation cavity (101) with second installation cavity (103) intercommunication;

the stator assembly (2) is at least partially positioned in the first mounting cavity (101), and the stator assembly (2) is matched with the stator limit seat (11);

A rotor assembly (3), wherein the rotor assembly (3) is arranged on the rotor limiting part (12), the rotor assembly (3) is positioned on the inner side of the stator assembly (2), and the rotor assembly (3) is at least partially positioned in the second mounting cavity;

the bearing assembly is sleeved on the rotor assembly (3), is clamped with the rotor limiting part (12), and is positioned in the second mounting cavity (103);

the circuit board (5), circuit board (5) with stator module (2) electricity is connected, circuit board (5) are equipped with the spacing hole of second, first spacing hole (102) set up with the spacing hole of second relatively, circuit board (5) pass through the spacing hole of second with the setting of first spacing hole (102) cooperatees stator spacing seat (11).

2. The brushless direct current motor according to claim 1, wherein the stator limit seat (11) comprises a housing assembly (111) and a positioning rib (112), the housing assembly (111) forms the first mounting cavity (101), the positioning rib (112) is arranged on the side wall of the housing assembly (111), the positioning rib (112) is arranged in the first mounting cavity (101), the stator assembly (2) is formed with a limit groove (201), the positioning rib (112) is clamped with the limit groove (201) in a matching manner, the rotor limit part (12) is arranged on the housing assembly (111), and the rotor limit part (12) is arranged at the center of the housing assembly (111).

3. The brushless direct current motor according to claim 2, wherein the housing assembly (111) comprises a housing body (1111), a first radial limiting portion (1112) and a first axial limiting portion (1113), the first axial limiting portion (1113) is disposed on the housing body (1111), one end of the first axial limiting portion (1113) forms a stator supporting surface (107), the stator assembly (2) is disposed on the stator supporting surface (107), the number of the first radial limiting portions (1112) is multiple, the first radial limiting portions (1112) are distributed on an inner peripheral wall of the housing body (1111) at intervals, the first radial limiting portions (1112) are disposed between an inner side wall of the housing body (1111) and an outer side wall of the stator assembly (2), the outer side wall of the stator assembly (2) is abutted against the first radial limiting portion (1112), and the positioning ribs (112) are disposed on one end, close to the stator assembly, of the first radial limiting portions (1112).

4. The brushless direct current motor according to claim 1, characterized in that the rotor limit portion (12) comprises a second radial limit portion (121) and a second axial limit portion (122), the second radial limit portion (121) is disposed on a bottom wall of the stator limit seat (11), the second axial limit portion (122) is disposed on an inner side wall of the second radial limit portion (121), the second radial limit portion (121) is adjacent to one end of the stator assembly (2) and forms the second mounting cavity (103) with the second axial limit portion (122), the second axial limit portion (122) forms a first bearing supporting surface (105), the bearing assembly comprises a first bearing (41), the rotor assembly (3) is provided with an output shaft (33), the first bearing (41) is sleeved on the output shaft (33), the output shaft (33) extends into the second mounting cavity (103) through one end of the first bearing (41), and the second radial limit portion (121) abuts against the first peripheral wall (105) and is located on the first bearing supporting surface (41).

5. The brushless DC motor of claim 4 wherein the motor is configured to,

the novel clutch assembly comprises a bearing assembly, and is characterized by further comprising a clamp spring assembly (7), wherein a clamp spring groove (301) is formed in the peripheral wall of the output shaft (33), the clamp spring assembly (7) is matched with the clamp spring groove (301), and one side of the clamp spring assembly (7) is adjacent to the bearing assembly; and/or

The second radial limiting part (121) is far away from one end of the stator assembly (2) and forms a fourth installation cavity (108) between the second radial limiting part (122), two opposite sides of the second radial limiting part (122) are respectively formed with the first bearing supporting surface (105) and the second bearing supporting surface (106), the bearing assembly further comprises a second bearing (42), the output shaft (33) sequentially penetrates through the second installation cavity (103) and the fourth installation cavity (108), the second bearing (42) is sleeved on the output shaft (33) and is located in the fourth installation cavity (108), the end face of the second bearing (42) is propped against the second bearing supporting surface (106), and the outer peripheral wall of the second bearing (42) is propped against the side wall of the fourth installation cavity (108).

6. The brushless direct current motor according to claim 1, further comprising a reduction gearbox assembly (6), wherein a third mounting cavity (104) is formed on a side of the stator limit seat (11) away from the stator assembly (2), the third mounting cavity (104) is communicated with the second mounting cavity (103), the reduction gearbox assembly (6) is arranged on the stator limit seat (11), the reduction gearbox assembly (6) is at least partially located in the third mounting cavity (104), the rotor assembly (3) is connected with the reduction gearbox assembly (6), and the rotor assembly (3) extends into the three mounting cavities (104).

7. The brushless DC motor of claim 6 wherein the motor is configured to,

the rotor assembly (3) comprises a rotor iron core (31), a permanent magnet (32) and an output shaft (33), the permanent magnet (32) is arranged on the rotor iron core (31), the rotor iron core (31) is arranged at one end of the output shaft (33), one end, away from the rotor iron core (31), of the output shaft (33) is matched with the output gear (8), the output gear (8) is meshed with the reduction gearbox assembly (6), and the output shaft (33) is used for driving the output gear (8) to rotate; and/or

The stator limiting seat (11) is provided with a connecting portion (113), one end of the connecting portion (113) is provided with the first limiting hole (102), and the other end of the connecting portion (113) is connected with the reduction gearbox assembly (6).

8. The brushless direct current motor according to claim 1, characterized in that the stator assembly (2) comprises a stator skeleton assembly (21), a stator core (22) and a stator coil (23), the stator skeleton assembly (21) is arranged on the stator limit seat (11), the stator skeleton assembly (21) is formed with a coil accommodating groove, the stator core (22) is arranged on the stator skeleton assembly (21), the limit cavity is positioned on the inner side of the stator core, the stator limit seat (11) is formed with a stator supporting surface (107), the stator core (22) is positioned on the stator supporting surface (107), the stator core (22) is formed with a limit groove (201), the inner side wall of the stator limit seat (11) is provided with a positioning convex rib (112) and is matched with the limit groove (201), the stator coil (23) is connected with the circuit board (5), and the stator coil (23) is positioned in the coil accommodating groove.

9. The brushless dc motor according to claim 8, wherein the stator frame assembly (21) includes a first frame (211) and a second frame (212), the first frame (211) being disposed on the second frame (212), the first frame (211) being formed with a first coil receiving slot (202), the second frame (212) being formed with a second coil receiving slot (203), the first coil receiving slot (202) being in communication with the second coil receiving slot (203), the stator core (22) being located between the first frame (211) and the second frame (212); and/or

Still include hall sensing subassembly (9), hall sensing subassembly (9) set up on circuit board (5), stator module (2) are equipped with the inlet wire inslot, hall sensing subassembly (9) are located at least partially the inlet wire inslot.

10. A cooking machine, characterized by comprising:

a brushless dc motor as claimed in any one of claims 1 to 9;

the brushless direct current motor is positioned in the accommodating cavity;

and the stirring assembly is connected with the brushless direct current motor, and the brushless direct current motor drives the stirring assembly to rotate.