CN222127736U - DC brushless rotary motor device - Google Patents

Abstract

A DC brushless rotary motor device comprises a stator assembly and a rotor assembly, wherein the rotor assembly comprises an output shaft, an iron core rotor and a magnet group, the iron core rotor is sleeved on the output shaft and can synchronously rotate, a plurality of mounting holes extending along the axial direction are formed in the iron core rotor, the magnet group is provided with a plurality of magnets, the magnets are inserted into the mounting holes, the stator assembly comprises an iron core stator and a plurality of coils, the iron core stator is in a ring shape and surrounds the iron core rotor, the iron core stator is provided with a plurality of magnetic shoe parts which are arranged at intervals and extend towards the axis direction of the iron core rotor, the coils are sleeved on the magnetic shoe parts, and when the coils are electrified and work, the magnetic shoe parts generate virtual magnetic poles to interact with the magnet group to drive the rotor assembly to rotate at a constant speed in a directional mode. The direct current brushless rotary motor device has the advantages of simple structure, easy assembly, low rotation speed, large torque, high shock resistance, low noise and the like, can be widely applied to various products, such as handheld dust collectors and the like, has strong practicability, and is suitable for being popularized greatly.

Description

DC brushless rotary motor device

Technical Field

The utility model relates to the field of motors, in particular to a direct-current brushless rotary motor device.

Background

Brushless motors, which are also called commutatorless motors, are used in a wide variety of products, such as hand-held cleaners, etc. The structure of the existing brushless motor is different, and the structural characteristics of the brushless motor are different according to different product scenes of application. For the motor, the simpler the structure, the more convenient the equipment is to the cost of parts is reduced to the benefit. In addition, the better the heat dispersion of the motor is, the more stable operation of the motor can be ensured and the service life of the motor can be prolonged.

Disclosure of utility model

The utility model aims to solve the problems and provide a direct current brushless rotary motor device which has simple structure, easy assembly and good heat dissipation performance.

In order to solve the above problems, the present utility model provides a dc brushless rotary electric machine device, comprising a stator assembly and a rotor assembly, characterized in that,

The rotor assembly includes:

The output shaft is provided with a plurality of output shafts,

An iron core rotor sleeved on the output shaft and capable of synchronously rotating, a plurality of mounting holes extending along the axial direction are arranged in the iron core rotor,

The magnet group is provided with a plurality of magnets, and the magnets are inserted into the mounting holes;

The stator assembly includes:

The iron core stator is in a ring shape and surrounds the iron core rotor, and is provided with a plurality of magnetic shoe parts which are arranged at intervals and extend towards the axis direction of the iron core rotor;

a plurality of coils sleeved on the magnetic shoe part;

When the coil is energized, the magnetic shoe generates a virtual magnetic pole to interact with the magnet group to drive the rotor assembly to rotate at a constant speed in a directional manner.

Further, the magnets are uniformly distributed in an array, the magnetic poles of the magnets are distributed on the magnets along the direction perpendicular to the output shaft, and two adjacent magnets face the output shaft with opposite magnetic poles.

Further, the mounting hole comprises a first hole part and a second hole part, the second hole part is symmetrically arranged on two sides of the first hole part and penetrates through the first hole part, a limiting step is formed between the second hole part and the first hole part, and the magnet is mounted in the first hole part in a limiting mode.

Further, a minimum distance between the second hole portion and the core stator edge is smaller than a minimum distance between the first hole portion and the core stator edge.

Further, the motor further comprises a fan blade, and the fan blade is sleeved on the output shaft and can synchronously rotate along with the output shaft.

Further, the rotor assembly further comprises at least one rotor cover, wherein the rotor cover is sleeved on the output shaft and connected to one end or two ends of the iron core rotor so as to synchronously rotate along with the rotor assembly.

Further, the rotor cover is provided with a containing groove, the fan blade comprises a boss part and a fan blade part, the fan blade part is arranged on the circumferential outer wall of the boss part and is opposite to the rotor cover at intervals, and the boss part is embedded in the containing groove and is sleeved on the output shaft.

Further, the stator assembly further comprises an insulating frame, the insulating frame comprises a first insulating frame and a second insulating frame which can be combined, the first insulating frame and the second insulating frame are respectively arranged at two opposite ends of the iron core stator along the axial direction, and the insulating frame at least wraps part or all of the magnetic shoe part to separate the magnetic shoe part from the coil.

The motor rotor structure comprises an iron core rotor, and is characterized by further comprising a shell, wherein the shell comprises a first shell and a second shell which are connected in a butt joint mode, a first bearing hole is formed in the first shell, a first bearing is arranged in the first bearing hole, a second bearing hole is formed in the second shell, a second bearing is arranged in the second bearing hole, the first bearing and the second bearing are respectively sleeved on the output shaft and distributed on two sides of the iron core rotor, and at least one end of the output shaft penetrates through the shell and extends out of the shell.

Further, a first clamping step is arranged on the first shell, a second clamping step is arranged on the second shell, and two ends of the iron core stator are respectively propped against the first clamping step and the second clamping step to be fixed between the first shell and the second shell.

The present utility model has an advantageous contribution in that it effectively solves the above-mentioned problems. The direct current brushless rotary motor device has the advantages of simple structure, easy assembly, and easy heat dissipation due to the arrangement of the fan blades, and can ensure the stable operation of the motor and prolong the service life. In addition, the rotor cover is arranged outside the iron core rotor, so that the iron core rotor can be protected. The direct current brushless rotary motor device can realize the effects of low rotation speed, large torque, high vibration resistance, low noise and the like, can be widely applied to various products, such as a handheld dust collector and the like, has strong practicability and is suitable for being widely popularized.

Drawings

Fig. 1 is a schematic diagram of the overall structure.

Fig. 2 is an axial cross-sectional view.

Fig. 3 is a transverse cross-sectional view.

Fig. 4 is a schematic exploded view of the structure.

Fig. 5 is a schematic structural view of a stator assembly.

Fig. 6 is a schematic structural view of a rotor assembly.

Fig. 7 is an exploded view of the rotor assembly.

Fig. 8 is a schematic diagram of the principle of magnetic field action.

The drawing shows stator assembly 10, core stator 11, magnetic shoe 111, positioning hole 112, coil 12, insulating frame 13, first insulating frame 131, second insulating frame 132, spacer portion 133, barrier portion 134, rotor assembly 20, output shaft 21, core rotor 22, mounting hole 221, first hole portion 2211, second hole portion 2212, stopper step 2213, first positioning portion 222, magnet group 23, magnet 231, rotor cover 24, second positioning portion 241, accommodation groove 242, third positioning portion 243, fan blade 30, boss portion 31, fan blade portion 32, flat plate portion 321, raised line portion 322, fourth positioning portion 33, housing 40, first housing 41, first bearing hole 411, first stopper step 412, second housing 42, second stopper step 421, second stopper step 422, heat dissipation hole 43, first bearing 51, and second bearing 52.

Detailed Description

The following examples are further illustrative and supplementary of the present utility model and are not intended to limit the utility model in any way.

As shown in fig. 1 to 8, the dc brushless rotary electric machine device of the present utility model includes a stator assembly 10 and a rotor assembly 20.

The rotor assembly 20 includes an output shaft 21, a core rotor 22, and a magnet assembly 23. The iron core rotor 22 is sleeved on the output shaft 21 and can rotate synchronously, and a plurality of mounting holes 221 extending along the axial direction are formed in the iron core rotor 22, and the mounting holes 221 are used for mounting the magnets 231. The magnet assembly 23 includes a plurality of magnets 231, and the magnets 231 are inserted into the mounting holes 221 to interact with the stator assembly 10.

The stator assembly 10 includes a core stator 11 and a number of coils 12. The core stator 11 is annular and surrounds the core rotor 22. The core stator 11 is provided with a plurality of magnetic shoe portions 111 which are arranged at intervals and extend in the axial direction of the core rotor 22. The coil 12 is sleeved on the magnetic shoe 111.

When the coil 12 is energized, the magnetic shoe 111 generates a virtual magnetic pole to interact with the magnet group 23, thereby driving the rotor assembly 20 to rotate.

In this embodiment, the coil 12 is used to supply a constant current and constant voltage working power to drive the rotor assembly 20 to rotate at a constant speed.

The number of the magnets 231 and the number of the magnetic shoe 111 may be set as needed, and the present utility model is not limited thereto. In this embodiment, 6 magnets 231 and 9 mounting holes 221 are provided, and 9 magnetic shoes 111 are provided. The manner of energizing the coil 12 can be adjusted according to the number of the magnetic shoes 111 and the magnets 231, and the present utility model is not limited thereto.

Further, the magnets 231 are uniformly distributed in the core rotor 22 in an array along the circumferential direction of the core rotor 22. The poles of the magnet 231 are distributed on the magnet 231 in a direction perpendicular to the output shaft 21. In other words, one pole of the magnet 231 faces the output shaft 21, and the other pole faces away from the output shaft 21.

Further, adjacent two magnets 231 face the output shaft 21 with opposite poles. In this embodiment, the magnets 231 of the magnet set 23 are distributed along the clockwise direction in a manner of N, S, N, S, N, S facing the output shaft 21, and the working principle thereof is as follows:

As shown in fig. 8, when the coils are energized, the magnetic shoes 111 each generate a virtual magnetic pole (field) S, N, N, S, N, N, S, N, N in a clockwise direction, which interacts with the magnet pack 23 to drive the rotor assembly 20 to rotate at a constant directional speed.

Further, for convenience of magnetic conduction, the mounting hole 221 includes a first hole portion 2211 and a second hole portion 2212. The first hole 2211 is used for mounting the magnet 231, and the second hole 2212 is used for magnetic conduction. The second hole 2212 is symmetrically disposed at two sides of the first hole 2211 and penetrates the first hole 2211. The first hole 2211 is shaped to match the shape of the magnet 231, and in this embodiment, is a rectangular hole for mounting the rectangular-block-shaped magnet 231. The minimum distance between the second hole 2212 and the edge of the core stator 11 is smaller than the minimum distance between the first hole 2211 and the edge of the core stator 11, so that the second hole 2212 is closer to the edge to facilitate magnetic conduction.

Further, to prevent the displacement of the magnet 231, a limiting step 2213 is formed between the second hole portion 2212 and the first hole portion 2211, and the limiting step 2213 can prevent the magnet 231 from moving from the first hole portion 2211 to the second hole portion 2212, so that the magnet 231 is restrained in the first hole portion 2211 and cannot be displaced.

Further, in order to improve the heat dissipation performance of the motor, the motor device of the present utility model further includes a fan blade 30. The fan blade 30 is sleeved on the output shaft 21 and can synchronously rotate along with the output shaft 21. When the rotor assembly 20 rotates, the fan blades 30 synchronously rotate, so that air can be driven to flow, and the heat dissipation performance of the motor is improved.

Further, to protect the rotor assembly 20, the rotor assembly 20 further includes at least one rotor cover 24. The rotor cover 24 may cover the core rotor 22. The rotor cover 24 is sleeved on the output shaft 21 and connected to one or both ends of the iron core rotor 22, and can rotate synchronously with the rotor assembly 20. The number of rotor covers 24 may be set as desired. In this embodiment, a rotor cover 24 is disposed at each axial end of the core rotor 22.

Further, in order to allow the rotor cover 24 to rotate in synchronization with the core rotor 22 without rotating relative thereto, a first positioning portion 222 is provided on the core rotor 22, and a second positioning portion 241 is provided on the rotor cover 24. The first positioning portion 222 and the second positioning portion 241 may cooperate with each other. The first positioning portion 222 and the second positioning portion 241 are one of the positioning hole 112 and the positioning column. For example, in some embodiments, a first positioning portion 222 in the form of a positioning hole 112 is provided on the core rotor 22, and a second positioning portion 241 in the form of a protruding positioning post is provided on the rotor cover 24, the positioning post being inserted into the positioning hole 112 to allow the rotor cover 24 and the core rotor 22 to be connected together for synchronous rotation. As another example, in some embodiments, a first positioning portion 222 in the form of a protruding positioning post is provided on the core rotor 22, and a second positioning portion 241 in the form of a positioning hole 112 is provided on the rotor cover 24, and the positioning post is inserted into the positioning hole 112 to connect the rotor cover 24 and the core rotor 22 together for synchronous rotation.

In this embodiment, two rotor covers 24 are provided and are respectively connected to two ends of the core rotor 22. In other embodiments, one may be provided.

The rotor cover 24 may be shaped as desired, and the rotor cover 24 is preferably configured in a disk-symmetrical structure for smooth rotation of the rotor assembly 20.

Further, in order to facilitate the installation of the fan blade 30 and reduce the size of the product, the rotor cover 24 is provided with a receiving groove 242. The accommodating groove 242 is a circular groove or a circular stepped groove, and is coaxially disposed with the output shaft 21. A shaft hole is provided in the accommodating groove 242 for inserting the output shaft 21 so that the rotor cover 24 is sleeved on the output shaft 21.

The fan blade 30 includes a boss portion 31 and a fan blade portion 32. The shape of the boss 31 is matched with the shape of the accommodating groove 242. The boss portion 31 is also provided with a shaft hole for inserting the output shaft 21. The boss 31 is embedded in the accommodating groove 242 and is sleeved on the output shaft 21. The fan blade 32 is disposed on the circumferential outer wall of the boss 31, and is spaced from the rotor cover 24, so as to drive air to flow and dissipate heat when rotating.

The shape of the blade portion 32 may be set according to needs, and in this embodiment, the blade portion includes a flat plate portion 321 and raised strips 322 distributed along a vortex manner. The flat plate portion 321 is perpendicular to the central axis of the fan blade 30, and is formed by extending the outer circumferential wall of the boss portion 31. The raised strips 322 are provided on the flat plate 321 and are spaced apart from each other in a swirling manner. The ribs 322 form channels therebetween. The raised strips 322 are distributed on the surface of the flat plate 321 facing the rotor cover 24.

Further, in order to avoid the relative rotation between the rotor cover 24 and the fan blade 30, a third positioning portion 243 is provided on the rotor cover 24, and a fourth positioning portion 33 is provided on the boss portion 31 of the fan blade 30. The third positioning portion 243 and the fourth positioning portion 33 may cooperate with each other. The third positioning portion 243 and the fourth positioning portion 33 are one of positioning holes 112 and positioning columns. For example, in some embodiments, the rotor cover 24 is provided with a third positioning portion 243 in the form of a positioning hole 112, and the fan blade 30 is provided with a fourth positioning portion 33 in the form of a protruding positioning post, and the positioning post is inserted into the positioning hole 112 to connect the rotor cover 24 and the fan blade 30 together for synchronous rotation. For another example, in some embodiments, a third positioning portion 243 in the form of a protruding positioning post is provided on the rotor cover 24, and a fourth positioning portion 33 in the form of a positioning hole 112 is provided on the fan blade 30, and the positioning post is inserted into the positioning hole 112 to connect the rotor cover 24 and the fan blade 30 together for synchronous rotation.

Further, the stator assembly 10 may further include an insulation frame 13. For easy installation, the insulating frame 13 includes a first insulating frame 131 and a second insulating frame 132. The first insulating frame 131 and the second insulating frame 132 are respectively installed at opposite ends of the core stator 11 along the axial direction, so as to be combined together to wrap the core stator 11, and are separated between the core stator 11 and the coil 12 to isolate the core stator 11 from the coil 12.

When the insulating frame 13 wraps the core stator 11, it should wrap at least part or all of the magnetic shoe 111, and not necessarily wrap the core stator 11 entirely. When wrapping most of the surface of the magnetic shoe 111, the coil 12 is spaced apart by the insulating frame 13 while being disposed on the magnetic shoe 111 without contacting the surface of the magnetic shoe 111.

The insulating frame 13 is shaped according to the shape of the core stator 11, and when the first insulating frame 131 and the second insulating frame 132 are combined together, a spacer portion 133 having a hollow interior is formed so as to wrap the magnetic shoe portion 111. The number of spacer portions 133 is identical to the number of magnetic shoe portions 111, and the spacer portions 133 are spaced apart from each other. When the insulating frame 13 is mounted on the core stator 11, the magnetic shoe portion 111 of the core stator 11 is wrapped in the spacer portion 133, and the coil 12 can be sleeved on the spacer portion 133.

To prevent the loosening of the coil 12, a spacer 134 extending in the axial direction may be provided on the spacer portion 133, and the spacer 134 may be protruded with respect to the surface, so that the coil 12 may be limited to prevent the loosening.

Further, the dc brushless rotary electric machine apparatus of the present utility model further includes a housing 40. For easy installation, the housing 40 includes a first housing 41 and a second housing 42 connected in apposition.

The shapes of the first housing 41 and the second housing 42 are not limited, and in this embodiment, they are dome-shaped.

Further, a first bearing hole 411 is provided in the first housing 41, and a first bearing 51 is provided in the first bearing hole 411. The first bearing 51 is sleeved on the output shaft 21.

A second bearing hole 421 is provided in the second housing 42, and a second bearing 52 is provided in the second bearing hole 421. The second bearing 52 is sleeved on the output shaft 21.

The first bearing 51 and the second bearing 52 are respectively located at both sides of the iron core rotor 22, and support the output shaft 21 for smoother rotation.

To output power to the outside, at least one end of the output shaft 21 passes through the housing 40 to protrude outside the housing 40.

The first housing 41 and the second housing 42 are preferably connected by fasteners, for example, bolts. Of course, in other embodiments, other structures may be used for the connection, such as a snap-fit structure, etc.

Further, in order to fixedly mount the core stator 11 in the housing 40, a first latching step 412 is provided on the first housing 41, and a second latching step 422 is provided on the second housing 42. The two ends of the core stator 11 are respectively abutted against the first clamping step 412 and the second clamping step 422, so as to be clamped between the first housing 41 and the second housing 42 and fixed in the housing 40.

Further, for enhancing the reliability of the structure, positioning holes 112 may be provided in the core stator 11, and when the first housing 41 and the second housing 42 are fastened using fasteners, the fasteners simultaneously pass through the positioning holes 112 of the core stator 11, so that the core stator 11 and the housing 40 are fastened together by the fasteners.

Further, in order to improve heat dissipation performance, a heat dissipation hole 43 is provided in the housing 40.

Further, the heat dissipation hole 43 is disposed at a position far from the fan blade 30. In this embodiment, the heat dissipation holes 43 and the fan blades 30 are located at two ends of the rotor assembly 20, so that when the fan blades 30 rotate to drive air to flow, the air needs to flow through the rotor assembly 20 and the stator assembly 10 before flowing out of the heat dissipation holes 43, thereby effectively dissipating heat.

Although the present utility model has been disclosed by the above embodiments, the scope of the present utility model is not limited thereto, and each of the above components may be replaced with similar or equivalent elements known to those skilled in the art without departing from the spirit of the present utility model.

Claims (10)

1. A DC brushless rotary electric machine device comprising a stator assembly (10) and a rotor assembly (20), characterized in that,

The rotor assembly (20) comprises:

an output shaft (21),

An iron core rotor (22) sleeved on the output shaft (21) and capable of synchronously rotating, a plurality of mounting holes (221) extending along the axial direction are arranged in the iron core rotor (22),

A magnet group (23) provided with a plurality of magnets (231), wherein the magnets (231) are inserted into the mounting holes (221);

the stator assembly (10) comprises:

An iron core stator (11) which is annular and surrounds the iron core rotor (22), wherein the iron core stator (11) is provided with a plurality of magnetic shoe parts (111) which are arranged at intervals and extend towards the axis direction of the iron core rotor (22);

a plurality of coils (12) sleeved on the magnetic shoe part (111);

When the coil (12) is energized, the magnetic shoe (111) generates a virtual magnetic pole to interact with the magnet group (23) to drive the rotor assembly to rotate at a constant directional speed.

2. The direct current brushless rotating electric machine device according to claim 1, characterized in that the magnets (231) are distributed in a uniform array, the poles of the magnets (231) are distributed on the magnets (231) in a direction perpendicular to the output shaft (21), and adjacent two of the magnets (231) face the output shaft (21) with opposite poles.

3. The direct current brushless rotary electric machine device according to claim 1, wherein the mounting hole (221) includes a first hole portion (2211) and a second hole portion (2212), the second hole portion (2212) is symmetrically disposed at both sides of the first hole portion (2211) and penetrates the first hole portion (2211), and a limit step (2213) is formed between the second hole portion (2212) and the first hole portion (2211);

The magnet (231) is mounted in the first hole part (2211) in a limiting mode.

4. A dc brushless rotary electric machine apparatus as claimed in claim 3, wherein a minimum distance between the second hole portion (2212) and an edge of the core stator (11) is smaller than a minimum distance between the first hole portion (2211) and the edge of the core stator (11).

5. The direct current brushless rotary electric machine device according to claim 1, further comprising a fan blade (30), wherein the fan blade (30) is sleeved on the output shaft (21) and can synchronously rotate along with the output shaft (21).

6. The DC brushless rotating machine apparatus according to claim 5, wherein,

The rotor assembly (20) further comprises at least one rotor cover (24), and the rotor cover (24) is sleeved on the output shaft (21) and connected to one end or two ends of the iron core rotor (22) so as to synchronously rotate along with the rotor assembly (20).

7. The DC brushless rotating machine apparatus according to claim 6, wherein,

The rotor cover (24) is provided with a containing groove (242),

The fan blade (30) comprises a boss portion (31) and a fan blade portion (32), the fan blade portion (32) is arranged on the circumferential outer wall of the boss portion (31) and opposite to the rotor cover (24) at intervals, and the boss portion (31) is embedded in the accommodating groove (242) and sleeved on the output shaft (21).

8. The direct current brushless rotating electric machine device according to claim 1, wherein the stator assembly (10) further comprises an insulating frame (13), the insulating frame (13) comprises a first insulating frame (131) and a second insulating frame (132) which can be combined, the first insulating frame (131) and the second insulating frame (132) are respectively installed at two opposite ends of the iron core stator (11) along the axial direction, and the insulating frame (13) wraps at least part or all of the magnetic shoe (111) so as to separate the magnetic shoe (111) from the coil (12).

9. The DC brushless rotating electrical machine apparatus according to claim 1, wherein,

It also comprises a shell (40), wherein the shell (40) comprises a first shell (41) and a second shell (42) which are connected in a butt joint way,

A first bearing hole (411) is formed in the first housing (41), and a first bearing (51) is arranged in the first bearing hole (411);

A second bearing hole (421) is arranged on the second shell (42), and a second bearing (52) is arranged in the second bearing hole (421);

The first bearing (51) and the second bearing (52) are respectively sleeved on the output shaft (21) and distributed on two sides of the iron core rotor (22), and at least one end of the output shaft (21) penetrates through the shell (40) and extends out of the shell (40).

10. The dc brushless rotating electric machine device according to claim 9, wherein a first detent step (412) is provided on the first housing (41), a second detent step (422) is provided on the second housing (42), and both ends of the core stator (11) are respectively held against the first detent step (412) and the second detent step (422) and fixed between the first housing (41) and the second housing (42).