CN212258743U - Brushless motor and stator module thereof - Google Patents

Abstract

The utility model relates to a brushless motor and a stator component thereof, the stator component comprises a stator core, a wire frame sleeved on the stator core, a Hall component arranged on the wire frame and a circuit board connected with the Hall component; the stator core comprises an annular body and a plurality of internal teeth arranged in the annular body at intervals along the circumferential direction of the annular body; the wire frame comprises a plurality of sleeving parts which are inserted into the annular body, arranged corresponding to the inner teeth and sleeved on the inner teeth; the Hall assembly is arranged between two adjacent sleeved parts and is matched with the two sleeved parts for limiting through the arrangement of the limiting structure. This stator module is through installing hall element between two cup joints portions of adjacent setting of line frame and through limit structure with hall element and two cup joints portion cooperate spacing thereby can be convenient for this hall element's location installation, guarantee this hall element's mechanical position's accuracy, and then guarantee this hall element's precision and reliability.

Description

Brushless motor and stator module thereof

Technical Field

The utility model relates to a motor, more specifically say, relate to a brushless motor and stator module thereof.

Background

The hall assembly of stator module among the motor among the correlation technique is installed on the circuit board usually, and in the equipment process of motor, this hall assembly squints easily usually, leads to the mounted position inaccurate, leads to hall assembly response precision to reduce, and the reliability reduces.

SUMMERY OF THE UTILITY MODEL

The to-be-solved technical problem of the utility model lies in providing a modified stator module, further provides a modified motor.

The utility model provides a technical scheme that its technical problem adopted is: constructing a stator assembly, which comprises a stator core, a wire frame sleeved on the stator core, a Hall assembly arranged on the wire frame, and a circuit board connected with the Hall assembly;

the stator core includes an annular body and a plurality of internal teeth provided in the annular body at intervals in a circumferential direction of the annular body;

the wire frame comprises a plurality of sleeving parts which are inserted into the annular body, arranged corresponding to the inner teeth and sleeved on the inner teeth;

the Hall assembly is arranged between the two adjacent sleeved parts and is matched with the two sleeved parts for limiting through the arrangement of the limiting structures.

Preferably, the limiting structure comprises a limiting boss which is arranged on one side of the sleeving part opposite to the other sleeving part and protrudes out of the sleeving part;

the stator assembly further comprises a Hall limiting plate for limiting the Hall assembly; the Hall limiting plates are arranged between the two adjacent sleeved parts, and the two opposite sides of the Hall limiting plates are respectively matched with the limiting bosses of the two sleeved parts for limiting.

Preferably, the hall limiting plate comprises a supporting wall and side walls which are arranged on two opposite sides of the supporting wall and are abutted to the limiting boss;

the side wall and the support wall are integrally formed.

Preferably, the supporting wall is a metal sheet, and two ends of the metal sheet are bent to form the side wall.

Preferably, the hall assembly comprises at least one hall sensor.

Preferably, the bobbin includes a first bobbin in which the inner teeth of the stator core are fitted from one end of the stator core, and a second bobbin in which the inner teeth of the stator core are fitted from the other end of the stator core;

the Hall assembly is arranged on the first wire frame.

A brushless motor is also constructed, which comprises the stator assembly and a rotor assembly matched with the stator assembly;

the rotor assembly comprises a rotor core arranged in a stator core of the stator assembly in a penetrating mode and a plurality of magnetic steels arranged on the rotor core at intervals along the circumferential direction of the rotor core;

the rotor iron core comprises a cylindrical body and a plurality of bosses which are arranged on the outer peripheral wall of the cylindrical body at intervals;

an installation groove for installing the magnetic steel is formed between the two adjacent bosses;

the mounting groove and the magnetic steel binding surface are provided with at least one clearance groove.

Preferably, the boss is provided with an extrusion groove for the magnetic steel to be installed in the installation groove for being extruded by an external tool to fix the magnetic steel.

Preferably, the rotor assembly further comprises a casing sleeved on the periphery of the stator core;

a plurality of groups of mounting holes for mounting the brushless motor are formed in the shell;

the multiunit the mounting hole is followed the periphery wall interval and the evenly distributed of casing.

Preferably, the rotor assembly further comprises a fan blade located at one end of the rotor core, and a fan blade cover sleeved at one end of the casing and covering the periphery of the fan blade;

the shell comprises a shell body and a plurality of radiating fins which are arranged along the circumferential direction of the shell body at intervals and protrude out of the shell body;

the heat dissipation fins are arranged along the longitudinal direction of the shell, and a heat dissipation channel communicated with the fan blade cover for dissipating heat of the machine shell is formed between every two adjacent heat dissipation fins at intervals.

Implement the utility model discloses a brushless motor and stator module thereof has following beneficial effect: this stator module is through installing hall element between two cup joints portions of adjacent setting of line frame and through limit structure with hall element and two cup joints portion cooperate spacing thereby can be convenient for this hall element's location installation, guarantee this hall element's mechanical position's accuracy, and then guarantee this hall element's precision and reliability. The motor has the advantages of high efficiency, energy conservation, low noise, long service life and high comfort.

Drawings

The invention will be further explained with reference to the drawings and examples, wherein:

fig. 1 is a schematic structural view of an electric machine according to some embodiments of the present invention;

FIG. 2 is an exploded view of the motor of FIG. 1;

FIG. 3 is a top view of the motor shown in FIG. 1;

FIG. 4 is a schematic structural view of the motor of FIG. 2 showing the assembly of the upper bobbin and the Hall assembly;

FIG. 5 is a schematic view of a partial structure of the upper wire frame and the Hall assembly shown in FIG. 4;

fig. 6 is a schematic view of a rotor core of the motor shown in fig. 2;

FIG. 7 is a partial schematic structural view of the rotor core of FIG. 6;

fig. 8 is another partial structural view of the rotor core shown in fig. 6.

Detailed Description

In order to clearly understand the technical features, objects, and effects of the present invention, embodiments of the present invention will be described in detail with reference to the accompanying drawings.

Fig. 1 and 2 show some preferred embodiments of the electric machine of the invention. The motor can replace the traditional gasoline engine, is applied to construction machinery, engineering machinery, garden machinery, generator sets, agriculture and forestry plant protection machinery and petroleum and petrochemical machinery, and has the advantages of high efficiency, energy conservation, environmental protection, low noise, long service life and high comfort.

Further, as shown in fig. 1 and 2, in some embodiments, the electric machine may include a stator assembly and a rotor assembly. The stator assembly can be assembled with the rotor assembly and can drive the rotor assembly to rotate in a power-on state.

Further, in some embodiments, the stator assembly may include a stator core 11, a bobbin 12, a hall assembly 13, and a wiring board 14. The stator core 11 has a salient pole structure and may have a cylindrical shape, and specifically, in the present embodiment, the stator core 11 may be substantially and not limited to have a cylindrical shape. The bobbin 12 is sleeved on the stator core 11 and is used for mounting a coil winding. The hall element 13 may be disposed on the bobbin 12 and may be used to detect the position of the rotor assembly when the rotor assembly rotates. The wiring board 14 may be connected to the hall element 13. In some embodiments, the circuit board 14 can be connected to the hall element 12 by wires, although it will be appreciated that in other embodiments, the hall element 12 can be connected to the circuit board 14 by conductive contacts or attached to the circuit board 14.

Further, in some embodiments, the stator core 11 may include an annular body 111 and internal teeth 112. The annular body 111 is hollow and has a structure with two ends penetrating therethrough, and is annular. The internal teeth 112 may be provided in plurality, and the internal teeth 112 may be provided in the annular body 111 at intervals in the circumferential direction of the annular body 111. One end of the internal teeth 112 may be connected to an inner sidewall of the annular body 111, and the other end may extend in a radial direction of the annular body 111. In some embodiments, the internal teeth 112 can be integrally formed with the ring body 111.

Further, in some embodiments, the bobbin 12 may include a first bobbin 12a and a second bobbin 12b, and the first bobbin 12a and the second bobbin 12b may be respectively sleeved on the stator core 11 from both ends of the bobbin 12. In some embodiments, the first bobbin 12a may be an upper bobbin and may be sleeved on the inner teeth 112 of the stator core 11 from one end of the stator core 11, and the second bobbin 12b may be a lower bobbin and may be sleeved on the inner teeth 112 of the stator core 11 from the other end of the stator core 11. The first bobbin 12a and the second bobbin 12b may have the same structure, and the first bobbin 12a and the second bobbin 12b may be fitted around the inner teeth 112 of the stator core 11.

Further, as shown in fig. 4 and 5, in some embodiments, the wire frame 12 may include a socket portion 121 and a connection ring 122. That is, the first bobbin 12a and the second bobbin 12b may each include a socket 121 and a connection ring 122. The number of the sleeve-connection portions 121 may be multiple, the sleeve-connection portions 121 may be spaced and uniformly distributed along the circumferential direction, may be disposed in one-to-one correspondence with the internal teeth 112, and may be inserted into the annular body 111 and may be sleeved on the periphery of the correspondingly disposed internal teeth 112. Each sleeve joint part 121 can be a hollow structure with two through ends, the inner side wall of each sleeve joint part 121 can be provided with a through groove, the through grooves can extend along the length direction of the sleeve joint part 121, the two ends of each sleeve joint part can be communicated with openings at the two ends of the sleeve joint part 121, and the inner teeth 112 can be conveniently sleeved in the sleeve joint part 121. The inside of the engaging portion 121 can form a engaging groove with a shape and a size matched with the shape and the size of the inner teeth 112. The connection ring 122 may be disposed at one end of the socket part 121, and connected to each socket part 121, so as to connect the socket parts 121 into an integral structure.

Further, in some embodiments, the hall element 13 may be mounted on the first bobbin 12a, and there may be a plurality of hall elements 13, specifically, in some embodiments, there may be two hall elements 13. Each hall element 13 may be disposed between two adjacent sockets 121, and it should be noted that the specific position of the hall element 13 may be determined according to the actual number of slots and the number of pole pairs. A hall element 13 may be disposed between two adjacent sockets 121. Of course, it is understood that in other embodiments, there may be one hall element 13, which may be disposed between any two sockets 121 disposed adjacently. The hall element 13 can be used to detect the position of the rotor element of the brushless motor when it is rotating. Each hall assembly 13 may comprise a hall sensor. Of course, it will be understood that in other embodiments, the hall assembly 13 may also include a plurality of hall sensors.

Further, in some embodiments, the stator assembly may further include a limiting structure, the limiting structure may be disposed between two adjacent sleeving parts 121 and on the hall assembly 13, and the limiting structure may be used to cooperate and limit the hall assembly and the two sleeving parts 121, so as to facilitate positioning and installation of the hall assembly, ensure accuracy of a mechanical position of the hall assembly, and further ensure precision and reliability of the hall assembly. Further, in some embodiments, the stop structure may include a stop boss 1211. The limiting boss 1211 can be disposed on a side of the engaging portion 121 opposite to the engaging portion 121, and can protrude out of a sidewall of the engaging portion 121, which can be integrally formed with the engaging portion 121. In some embodiments, one or more limiting bosses 1211 may be disposed on a sidewall of each of the two adjacent sockets 121, and in particular, in some embodiments, three limiting bosses 1211 may be disposed. The limiting bosses 1211 on the two adjacent sleeving parts 121 can be arranged oppositely and can be matched with each other to limit the hall assembly 13.

In some embodiments, the stator assembly may also include a hall limiting plate 15. The hall limiting plate 15 can be used for mounting the hall assembly 13 and limiting the hall assembly 13. The hall position limiting plate 15 can be disposed between two adjacent sleeving parts 121, and two opposite sides can be respectively abutted to the position limiting bosses 1211 on the two sleeving parts 121, and can be matched with the position limiting bosses 1211 of the two sleeving parts 121 for limiting, so as to limit the hall assembly 13. Specifically, the limiting bosses of the two sleeving parts 121 can achieve the effect of fixing the hall limiting plate 15 through interference fit. In some embodiments, the hall limiting plate 15 may include a supporting wall 151 and a side wall 152, and the supporting wall 151 may be mounted with the hall element 13. When the Hall assembly 13 is installed, the Hall assembly 13 can be flatly attached to the supporting wall 15 and fixed by gluing the Hall assembly 13. The sidewalls 152 may be disposed on two opposite sides of the supporting wall 151, and may abut against the limit bosses 1211. In some embodiments, the sidewall 152 may be integrally formed with the support wall 151. In some embodiments, the supporting wall 151 may be a metal sheet, and the side wall 152 may be formed by bending two ends of the metal sheet.

Further, as shown in fig. 2, in some embodiments, the rotor assembly may include a rotor core 21, magnetic steel 22, a rotating shaft 23, a casing 24, a first end cover 25, and a second end cover 26. This rotor core 21 can be the column, can pass and locate in this stator core 11, and this magnet steel 22 can be a plurality of, and this a plurality of magnet steels 22 can set up on this rotor core 21 along this rotor core 22's circumference interval to place in this stator core 11. The rotating shaft 23 can be disposed on the rotor core 22, and two ends of the rotating shaft can penetrate through the rotor core 22. The housing 24 may be disposed around the stator core 11. The first end cap 25 and the second end cap 26 can be disposed at two ends of the casing 24, and can cover the casing 24.

As shown in fig. 6 to 8, further, in some embodiments, the rotor core 21 may include a cylindrical body 211 and a plurality of bosses 212 disposed on an outer circumferential wall of the cylindrical body 211. The outer diameter of the cylindrical body 211 may be smaller than the inner diameter of the stator core 11. The protrusion 212 may protrude from the outer circumferential wall of the column 211, and may be in the shape of a strip, which may extend along the height direction of the column 211. An installation groove 213 can be formed between two adjacent bosses 212, and the installation groove 213 can be isosceles trapezoid, which can be used for installing the magnetic steel 22. Each mounting groove 213 may be disposed corresponding to one magnetic steel 22. The length of the mounting groove 213 can be adapted to the magnetic steel 22. In some embodiments, the contact surface of the mounting groove 213 and the magnetic steel 22 may be provided with a plurality of clearance grooves 214, and the plurality of clearance grooves 214 may be arranged at intervals along the width direction of the mounting groove 213, and it is understood that in other embodiments, the number of clearance grooves 214 may not be limited to a plurality, and may be one. Through setting up this clearance groove 214, can guarantee the circular arc precision of magnet steel 22 bottom surface binding face, improve the cooperation precision of magnet steel 22 and rotor core 21, guarantee the uniformity of top surface circular arc size and circularity after magnet steel 22 assembles. During installation, the magnetic steel 22 may be pressed into the rotor core 21 through the installation groove 213, and attached to the outer sidewall of the rotor core 21, i.e., overlapped with the bottom surface of the installation groove 213. The magnetic steel 22 and the mounting groove 213 can adopt a clearance fit mode.

In some embodiments, the pillar 211 may include a central through hole 2111, and the central through hole 2111 may be disposed through the pillar 211 in a longitudinal direction thereof. The central through hole 2111 is used for the rotating shaft 23 to pass through. A plurality of avoidance grooves 2112 may be provided in an inner side wall of the central through hole 2111, and the avoidance grooves 2112 may be provided at intervals in the circumferential direction of the central through hole 2111. In some embodiments, a plurality of limiting bosses 2113 may be further disposed on an inner side wall of the central through hole 2111, the limiting bosses 2113 may be disposed at intervals in the circumferential direction of the central through hole 2111, and an abutting surface of the limiting boss 2113 and the rotating shaft 23 may be an arc surface. The limiting boss 2113 can be used for limiting the rotating shaft 23, and the arc surface of the limiting boss can be attached to the rotating shaft 23, so that the matching precision of the rotating shaft and the rotor core 21 is improved. The clearance groove 2112 may be formed by a space between two adjacent limit bosses 2113. In some embodiments, a plurality of insertion holes 2114 may be further disposed on the column 211, and the insertion holes 2114 may be disposed corresponding to the internal teeth 112 of the stator core 11 for the internal teeth 112 to be inserted.

Further, in some embodiments, a pressing groove 215 may be disposed on the boss 212, and the pressing groove 215 may be disposed on a side of the boss 212 away from the cylindrical body 211 and may be disposed along a length direction of the boss 212. The pressing groove 215 can be installed in the installation groove 214 at the magnetic steel 22 for external tools to press, thereby fixing the magnetic steel 22. Specifically, after the magnetic steel 22 is completely pressed into the mounting groove 213, the fixture is inserted into the pressing groove 215, and then all the pressing grooves 215 on the rotor core 21 are synchronously pressed, so that the magnetic steel 22 is pressed and fixed.

The consistency of the air gap in the running process of the motor can be ensured by the installation mode of the extrusion groove 215 and the clearance groove 214, the electromagnetic vibration and the noise of the motor are improved, and the running life is prolonged. Compared with the traditional magnetic steel 22 fixing method, the magnetic steel 22 is fixed in a mechanical compression fixing mode, glue and a magnetic steel sheath are not needed, the process and installation cost are saved, meanwhile, the structural reliability is higher, meanwhile, the magnetic steel 22 is not needed to be fixed in the magnetic steel sheath, the air gap can be made smaller, the electromagnetic loss of the motor is reduced, and the operation efficiency of the motor is improved.

Further, as shown in fig. 1 to 3, in some embodiments, the casing 24 may have a cylindrical shape, which may be a hollow structure with two ends penetrating. The casing 24 may be disposed around the periphery of the stator assembly 10. The casing 24 may include a housing 241 and heat dissipation fins 242.

The case 241 has a hollow structure with both ends penetrating. The casing 24 may be provided with a plurality of sets of mounting holes 2411, and the plurality of sets of mounting holes 2411 may be spaced and uniformly distributed along the outer circumferential wall of the casing 24. In some embodiments, the mounting holes 2411 may be eight sets, the eight sets of mounting holes 2411 may be correspondingly disposed in four directions of the casing 24, and two sets of mounting holes 2411 may be disposed side by side in each direction. Each set of mounting holes 2411 may include two mounting holes 2411, and two sets of adjacent mounting holes 2411 are disposed correspondingly and have the same height. Of course, it is understood that the mounting holes 2411 may not be limited to eight sets in other embodiments. In some embodiments, the mounting hole 2411 may be a threaded hole. By arranging a plurality of sets of mounting holes 2411 in a plurality of directions of the housing 24, the brushless motor can be mounted and fixed on external mechanical equipment in any direction.

In some embodiments, the housing 241 may further include a connection hole 2412, and the connection hole 2412 may be used for connecting with an external connection wire, such as the hall temperature signal wire 31 and/or the waterproof fixed joint 32 connected with a three-phase wire.

Further, in some embodiments, the heat dissipation fins 242 may be multiple, and the multiple heat dissipation fins 242 may be disposed at intervals along the circumference of the housing 241 and may protrude from the housing 241. The interval between two adjacent heat dissipation fins 242 may form a heat dissipation channel 243, and the heat dissipation channel 243 may facilitate air to flow in to dissipate heat of the housing 241, so as to dissipate heat of the entire brushless motor.

In some embodiments, the rotor assembly may further include a fan blade 27 and a fan blade cover 28. The fan 27 can be disposed at one end of the rotor core 21, specifically, it can be disposed on the first end cap 25, and the fan 27 can be driven by the rotation of the rotating shaft 23. The fan blade cover 28 can be sleeved on one end of the casing 24, can be detachably connected with the casing 24, and can be covered on the periphery of the fan blade 27.

In some embodiments, the blade cover 28 may include a cover 281, and the cover 281 may be a cylindrical structure, and may have a hollow structure inside and an opening at one end. The inner dimensions of the cover 281 may be adapted to the outer dimensions of the housing 241. The bottom surface of the cover 281 may be provided with a plurality of heat dissipating through holes 281, and the number of the heat dissipating through holes 281 may be plural. The heat dissipation channel 243 can be disposed in communication with the blade cover 28. When the brushless motor is started, the rotation shaft 23 rotates to drive the fan blades 27 to rotate, and the wind enters from the heat dissipation through hole 281 and flows through the surface of the casing 24 through the heat dissipation channel 243 to cool and dissipate the heat of the surface of the casing 24.

In some embodiments, the rotor assembly may further include a set of bearings 29, and the set of bearings 29 may include two bearings 29, one of which is a large bearing having a larger radial dimension and the other of which is a small bearing having a smaller radial dimension. The two bearings 29 may be spaced apart, with the larger bearing being mounted on the second end cap 25 and the smaller bearing being mounted on the first end cap 26.

It is to be understood that the foregoing examples merely represent preferred embodiments of the present invention, and that the description thereof is more specific and detailed, but not intended to limit the scope of the invention; it should be noted that, for those skilled in the art, the above technical features can be freely combined, and several modifications and improvements can be made without departing from the concept of the present invention, which all belong to the protection scope of the present invention; therefore, all changes and modifications that come within the meaning and range of equivalency of the claims are to be embraced within their scope.

Claims (10)

1. A stator assembly is characterized by comprising a stator iron core (11), a wire frame (12) sleeved on the stator iron core (11), a Hall assembly (13) arranged on the wire frame (12), and a circuit board (14) connected with the Hall assembly (13);

the stator core (11) comprises an annular body (111) and a plurality of internal teeth (112) arranged in the annular body (111) at intervals along the circumferential direction of the annular body (111);

the wire frame (12) comprises a plurality of sleeving parts (121) which are inserted into the annular body (111), arranged corresponding to the inner teeth (112) and sleeved on the inner teeth (112);

the Hall assembly (13) is arranged between the two adjacent sleeved parts (121) and is matched and limited with the two sleeved parts (121) by arranging a limiting structure.

2. The stator assembly according to claim 1, wherein the limiting structure comprises a limiting boss (1211) which is arranged on one side of the sleeve joint part (121) opposite to the other sleeve joint part (121) and protrudes out of the sleeve joint part (121);

the stator assembly further comprises a Hall limiting plate (15) for limiting the Hall assembly (13); the Hall limiting plates (15) are arranged between the two adjacent sleeving parts (121), and the two opposite sides of the Hall limiting plates are respectively matched with the limiting bosses (1211) of the two sleeving parts (121) for limiting.

3. The stator assembly according to claim 2, characterized in that the hall limiting plate (15) comprises a supporting wall (151) and side walls (152) arranged at two opposite sides of the supporting wall (151) to abut against the limiting bosses (1211);

the side wall (152) is integrally formed with the support wall (151).

4. A stator assembly according to claim 3, characterized in that the support wall (151) is a metal sheet, the two ends of which are bent to form the side walls (152).

5. The stator assembly according to claim 1, characterized in that the hall assembly (13) comprises at least one hall sensor.

6. The stator assembly according to claim 1, wherein the bobbin (12) includes a first bobbin (12a) that is fitted over the internal teeth (112) on the stator core (11) from one end of the stator core (11), and a second bobbin (12b) that is fitted over the internal teeth (112) on the stator core (11) from the other end of the stator core (11);

the Hall assembly (13) is arranged on the first wire frame (12 a).

7. A brushless electric machine comprising a stator assembly according to any one of claims 1 to 6, and a rotor assembly cooperating with the stator assembly;

the rotor assembly comprises a rotor core (21) which is arranged in a stator core (11) of the stator assembly in a penetrating mode, and a plurality of magnetic steels (22) which are arranged on the rotor core (21) at intervals along the circumferential direction of the rotor core (21);

the rotor core (21) comprises a cylindrical body (211) and a plurality of bosses (212) arranged on the outer peripheral wall of the cylindrical body (211) at intervals;

an installation groove (213) for installing the magnetic steel (22) is formed between the two adjacent bosses (212);

the mounting groove (213) and the magnetic steel (22) are provided with at least one clearance groove (214) on the binding surface.

8. The brushless motor according to claim 7, wherein the boss (212) is provided with a pressing groove (215) for an external tool to press to fix the magnetic steel (22) when the magnetic steel (22) is installed in the installation groove (213).

9. The brushless electric machine according to claim 7, wherein the rotor assembly further comprises a housing (24) fitted around the outer periphery of the stator core (11);

a plurality of groups of mounting holes (2411) for mounting the brushless motor are formed in the shell (24);

the multiple groups of mounting holes (2411) are spaced and uniformly distributed along the peripheral wall of the machine shell (24).

10. The brushless motor according to claim 9, wherein the rotor assembly further comprises a fan blade (27) located at one end of the rotor core (21), and a fan blade cover (28) sleeved at one end of the housing (24) and covering the periphery of the fan blade (27);

the shell (24) comprises a shell (241) and a plurality of radiating fins (242) which are arranged along the circumferential direction of the shell (241) at intervals and are arranged to protrude out of the shell (241);

the radiating fins (242) are arranged along the longitudinal direction of the shell (241), and a radiating channel (243) communicated with the fan blade cover (28) for radiating heat of the machine shell (24) is formed at the interval between two adjacent radiating fins (242).

Images