CN218415935U

CN218415935U - Direct current brushless motor

Info

Publication number: CN218415935U
Application number: CN202222282158.5U
Authority: CN
Inventors: 卢齐荣
Original assignee: New Century Electrical Manufacturing Zhongshan Co Ltd
Current assignee: New Century Electrical Manufacturing Zhongshan Co Ltd
Priority date: 2022-08-26
Filing date: 2022-08-26
Publication date: 2023-01-31
Anticipated expiration: 2032-08-26

Abstract

The utility model discloses a brushless DC motor, it passes through be equipped with between magnetic ring and the motor casing inside wall and separate the magnetic ring, can avoid motor casing to cause the influence to the magnetic ring, prevent the magnetism of magnetic ring and feel the line process, effectively reduce the magnetic flux that gets into motor casing lateral wall to improve motor work efficiency, guarantee that motor job stabilization is reliable.

Description

Direct current brushless motor

[ technical field ] A method for producing a semiconductor device

The utility model relates to a brushless DC motor.

[ background of the invention ]

The general motor comprises a stator assembly and a rotor assembly, and the structure of the motor is different according to different use conditions. The stator assembly of the motor for the ceiling fan comprises a stator shaft, the stator assembly is fixedly connected to a ceiling through the stator shaft, the rotor assembly comprises a shell assembly and a permanent magnet arranged in the shell assembly, and the shell assembly and the permanent magnet are arranged on the stator shaft in a rotating mode as a whole.

In order to save the manufacturing cost of the motor at the present stage, the shell component is usually made of magnetic conductive materials such as iron, and therefore a magnetic attraction effect exists between the shell component and the permanent magnet, magnetic induction lines of the permanent magnet are affected, and the problems of low working efficiency and poor stability performance of the motor are caused.

Therefore, the present invention has been made in view of the above problems.

[ Utility model ] content

The utility model discloses the purpose is overcome prior art not enough, provides a brushless DC motor, can improve the problem that prior art exists, has work efficiency height, characteristics that job stabilization is reliable.

The utility model discloses a realize through following technical scheme:

a direct current brushless motor comprises a stator shaft 10, wherein a stator assembly 20 which can be fixed relative to the stator shaft 10 is sleeved on the stator shaft 10, a rotor assembly 30 which can rotate relative to the stator shaft 10 is sleeved on the peripheral side of the stator assembly 20, a motor housing 40 which can rotate relative to the stator shaft 10 and is fixed relative to the rotor assembly 30 is connected onto the stator shaft 10, and the stator assembly 20 and the rotor assembly 30 are positioned on the inner side of the motor housing 40; the rotor assembly 30 includes a magnetic ring 301 located between the stator assembly 20 and the motor housing 40, and a magnetism isolating ring 302 is disposed between the magnetic ring 301 and the inner sidewall of the motor housing 40.

The brushless dc motor includes a lower motor shell 401 disposed on the stator shaft 10, and an upper motor shell 402 disposed on the stator shaft 10 and used in cooperation with the lower motor shell 401, wherein a plurality of heat dissipation holes 403 are disposed on the lower motor shell 401 and the upper motor shell 402 respectively, the heat dissipation holes 403 communicate with an inner cavity of the motor housing 40, each heat dissipation hole 403 includes an inclined opening 4031 and a spoiler 4032, and an orientation of the inclined opening 4031 on the lower motor shell 401 is opposite to an orientation of the inclined opening 4031 on the upper motor shell 402.

In the brushless dc motor, the lower motor shell 401 and the upper motor shell 402 are welded together.

As described above, the stator assembly 20 includes the stator body 1 and the insulating housing 2 for covering the stator body 1, the stator body 1 has a plurality of winding posts 11 uniformly distributed on the periphery side and along the circumferential direction thereof at intervals, two adjacent winding slots 12 are formed between the winding posts 11, and each of the winding posts 11 is provided with the wire blocking portion 111 on the outer end, the insulating housing 2 includes the accommodating portion 23 for accommodating each winding post 11, the first shielding portion 24 for shielding the side wall of the winding slot 12 on the periphery side of the stator body 1, and the second shielding portion 25 for shielding the side wall of the winding slot 12 on the wire blocking portion.

As described above, the insulating housing 2 includes the lower housing 21 and the upper housing 22, the lower housing 21 is provided with the lower convex shell 211 capable of extending into the winding slot 12, and the lower housing 21 and the lower convex shell 211 between two adjacent lower convex shells 211 form the lower receiving slot 212 for receiving the winding post 11; an upper convex shell 221 which can extend into the winding slot 12 and can be detachably connected with the lower convex shell 211 is arranged on the upper shell 22, and an upper accommodating slot 222 which is opposite to the lower accommodating slot 212 is formed on the upper shell 22 and between two adjacent upper convex shells 221; the receiving part 23 is formed by a lower receiving groove 212 and an upper receiving groove 222, the first shielding part 24 is provided on inner bottom walls of the lower and

upper housings

211 and 221, and the second shielding part 25 is provided on inner top walls of the lower and

upper housings

211 and 221.

As for the above brushless dc motor, an insertion structure 26 is disposed between the lower convex shell 211 and the upper convex shell 221; the inserting structure 26 includes an inserting convex edge 261 provided on the lower convex shell 211 and an inserting concave ring 262 provided on the upper convex shell 221 and used for inserting the inserting convex edge 261 so as to connect the lower shell 21 with the upper shell 22.

As for the above brushless dc motor, a positioning structure 27 is disposed between the lower convex shell 211 and the upper convex shell 221; the positioning structure 27 includes a positioning slant 271 disposed on the lower convex shell 211 and a positioning slant 272 disposed on the upper convex shell 221 and matched with the positioning slant 271.

As described above, in the brushless dc motor, the lower protruding shell 211 and the lower housing 21 are integrally formed, and the upper protruding shell 221 and the upper housing 22 are integrally formed.

In the above brushless dc motor, the edges of the lower convex shell 211 and the upper convex shell 221, which are used for contacting with the coil windings, are arc-shaped.

In the above brushless dc motor, the insulating housing 2 is made of modified nylon and/or glass fiber material.

Compared with the prior art, the utility model has the advantages of as follows:

1. the utility model discloses a be equipped with between magnetic ring and the motor casing inside wall and separate the magnetic ring, can avoid motor casing to cause the influence to the magnetic ring, prevent the magnetic induction line process of magnetic ring, effectively reduce the magnetic flux that gets into motor casing lateral wall to improve motor work efficiency, guarantee that motor job stabilization is reliable.

2. The utility model discloses an insulating housing includes the portion of holding that is used for holding each wrapping post, is used for sheltering from the first shelter from portion of the winding groove lateral wall on the stator body week side and is used for sheltering from the second shelter from portion of the winding groove lateral wall on the stop line portion, can be better cover the winding position that is used for supplying coil winding to twine on the stator core, avoid the phenomenon that coil winding and stator core contact, guarantee stator module's insulating properties; in addition, the insulating shell can be conveniently operated by workers to correspondingly cover each winding post by the accommodating part, the first shielding part correspondingly shields the winding slot side wall on the peripheral side of the stator body, and the first shielding part correspondingly shields the winding slot side wall on the wire blocking part, so that the assembly efficiency is improved, and the working strength is reduced.

3. In order to assemble conveniently and quickly, the inserting structure comprises an inserting convex edge arranged on the lower convex shell and an inserting concave ring arranged on the upper convex shell and used for inserting the inserting convex edge so as to connect the lower shell with the upper shell.

4. Be equipped with location structure between convex shell and the last convex shell down, can make lower convex shell and last convex shell be connected more firmly, can also make lower convex shell and the accurate alignment of last convex shell in addition.

5. The lower convex shell and the lower shell are of an integrated structure, the upper convex shell and the upper shell are of an integrated structure, the structural strength of the insulating shell can be improved, and the production and manufacturing cost can be reduced.

6. The insulating housing is made of modified nylon and/or glass fiber materials, so that the insulating housing is more durable and has higher hardness, and the service life of the insulating housing is prolonged.

[ description of the drawings ]

The following detailed description of embodiments of the present invention is provided with reference to the accompanying drawings, in which:

fig. 1 is a perspective view of the stator assembly of the present invention when no coil winding is wound thereon.

Fig. 2 is a perspective view of the stator assembly of the present invention wound with the coil winding.

Fig. 3 is an exploded view of the stator assembly of the present invention.

Fig. 4 is a perspective view of the insulating housing of the present invention.

Fig. 5 is an enlarged schematic view of a in fig. 4.

Fig. 6 is a perspective view of the present invention.

Fig. 7 is one of the cross-sectional views of the present invention.

Fig. 8 is a second cross-sectional view of the present invention.

Fig. 9 is an exploded view of the present invention.

[ detailed description ] embodiments

The following describes embodiments of the present invention in detail with reference to fig. 1 to 9.

As shown in fig. 1-9, the brushless dc motor of the present invention includes a stator shaft 10, a stator assembly 20 that can be fixed with respect to the stator shaft 10 is sleeved on the stator shaft 10, a rotor assembly 30 that can rotate with respect to the stator shaft 10 is sleeved on the periphery of the stator assembly 20, a motor housing 40 that can rotate with respect to the stator shaft 10 and is fixed with respect to the rotor assembly 30 is connected to the stator shaft 10, and the stator assembly 20 and the rotor assembly 30 are located inside the motor housing 40; the rotor assembly 30 includes a magnetic ring 301 located between the stator assembly 20 and the motor housing 40, and a magnetism isolating ring 302 is disposed between the magnetic ring 301 and the inner sidewall of the motor housing 40. The utility model discloses a be equipped with between magnetic ring and the motor casing inside wall and separate the magnetic ring, can avoid motor casing to cause the influence to the magnetic ring, prevent the magnetic induction line process of magnetic ring, effectively reduce the magnetic flux that gets into motor casing lateral wall to improve motor work efficiency, guarantee that motor job stabilization is reliable.

In order to improve the magnetic isolation effect, the magnetic isolation ring 302 is made of aluminum material or plastic. In the present invention, it is preferable that the magnetism isolating ring 302 is made of aluminum, and the magnetism isolating ring 302 is fixed to the motor housing 40 by welding.

As shown in fig. 6 to 9, in order to better dissipate heat of the motor, the motor housing 40 includes a lower motor housing 401 disposed on the stator shaft 10 and an upper motor housing 402 disposed on the stator shaft 10 and used in cooperation with the lower motor housing 401, a plurality of heat dissipating holes 403 are respectively disposed on the lower motor housing 401 and the upper motor housing 402 and communicate with an inner cavity of the motor housing 40, the heat dissipating holes 403 include an oblique opening 4031 and a spoiler 4032, and an orientation of the oblique opening 4031 on the lower motor housing 401 is opposite to an orientation of the oblique opening 4031 on the upper motor housing 402. As shown in fig. 6, the oblique opening 4031 on the lower motor shell 401 in the present embodiment is oriented in the same direction as the motor rotation direction, and the oblique opening 4031 on the upper motor shell 402 is oriented in the opposite direction, so that during the rotation of the motor housing 40, the external air enters the inner cavity of the motor housing 40 from the oblique opening 4031 on the upper motor shell 402 and then flows out from the oblique opening 4031 on the lower motor shell 401, and the heat dissipation effect is further enhanced, and the service life of the motor is prolonged.

Preferably, the spoiler 4032 is located inside the motor housing 40.

As shown in fig. 6 to 9, in order to make the connection of the motor housing more firm, the lower motor housing 401 and the upper motor housing 402 are welded.

As shown in fig. 1 to 5, the stator assembly 20 includes a stator body 1 and an insulating housing 2 for covering the stator body 1, a plurality of winding posts 11 are uniformly distributed on the circumferential side of the stator body 1 along the circumferential direction and at intervals, a winding slot 12 is formed between two adjacent winding posts 11, a wire blocking portion 111 is provided on the outer end of each winding post 11, and the insulating housing 2 includes an accommodating portion 23 for accommodating each winding post 11, a first shielding portion 24 for shielding the side wall of the winding slot 12 on the circumferential side of the stator body 1, and a second shielding portion 25 for shielding the side wall of the winding slot 12 on the wire blocking portion. The utility model discloses an insulating housing includes the portion of holding that is used for holding each wrapping post, is used for sheltering from the first shielding portion of the winding groove lateral wall on the stator body week side and is used for sheltering from the second shielding portion of the winding groove lateral wall on the stop wire portion, can be better cover the winding position that is used for supplying coil winding to twine on the stator core, avoid the phenomenon that coil winding and stator core contact to appear, guarantee stator module's insulating properties, as shown in fig. 2; in addition, the insulating shell can be conveniently operated by workers to correspondingly cover each winding post by the accommodating part, the first shielding part correspondingly shields the winding slot side wall on the peripheral side of the stator body, and the first shielding part correspondingly shields the winding slot side wall on the wire blocking part, so that the assembly efficiency is improved, and the working strength is reduced.

As shown in fig. 1 to 5, for convenience of assembly, the insulating housing 2 includes a lower housing 21 and an upper housing 22, a lower convex shell 211 capable of extending into the winding slot 12 is disposed on the lower housing 21, and a lower receiving slot 212 for receiving the winding post 11 is formed on the lower housing 21 and between two adjacent lower convex shells 211; an upper convex shell 221 which can extend into the winding slot 12 and can be detachably connected with the lower convex shell 211 is arranged on the upper shell 22, and an upper accommodating slot 222 which is opposite to the lower accommodating slot 212 is formed on the upper shell 22 and between two adjacent upper convex shells 221; the accommodating part 23 is formed of a lower accommodating groove 212 and an upper accommodating groove 222, the first shielding part 24 is provided on inner bottom walls of the lower and

upper housings

211 and 221. In the present embodiment, the first shade 24 is formed by the inner bottom walls of the lower and

upper shells

211 and 221; the second shielding portion 25 is formed at the inner top walls of the lower and

upper housings

211 and 221.

As shown in fig. 1 to 5, in order to facilitate winding of the coil winding, open slots 2111 for communicating with the slots of the winding slots 12 when the insulating housing 2 covers the stator core 1 are formed in the inner top walls of the lower convex shell 211 and the upper convex shell 221, and guide inclined walls 2112 are further formed in the inner top walls of the lower convex shell 211 and the upper convex shell 221.

As shown in fig. 1 to 5, for assembling convenience, an insertion structure 26 is provided between the lower convex shell 211 and the upper convex shell 221.

As shown in fig. 1 to 5, the inserting structure 26 includes an inserting convex edge 261 provided on the lower convex shell 211 and an inserting concave ring 262 provided on the upper convex shell 221 and into which the inserting convex edge 261 is inserted to connect the lower shell 21 with the upper shell 22. During assembly, a worker operates the lower shell 21 to correspondingly extend each lower convex shell 211 into each winding slot 12, then operates the upper shell 22 to correspondingly extend each upper convex shell 221 into each winding slot 12, and at this time, the insertion convex edge 261 of the lower convex shell 211 and the insertion concave ring 262 of the upper convex shell 221 which are located in the same winding slot 12 are in insertion fit, so that the lower convex shell 211 and the upper convex shell 221 are connected, and the lower shell 21 and the upper shell 22 are connected conveniently; in addition, the winding slot 12 of the present embodiment has a limiting effect on the lower convex shell 211 and the upper convex shell 221, so as to ensure that the lower convex shell 211 and the upper convex shell 221 are accurately aligned, and ensure that the insertion convex edge 261 and the insertion concave ring 262 are accurately inserted.

As shown in fig. 1 to 5, a positioning structure 27 is disposed between the lower convex shell 211 and the upper convex shell 221, so that the lower convex shell 211 and the upper convex shell 221 can be precisely aligned.

As shown in fig. 1-5, the positioning structure 27 includes a positioning slant 271 disposed on the lower convex shell 211 and a positioning slant 272 disposed on the upper convex shell 221 and in positioning engagement with the positioning slant 271.

As shown in fig. 1 to 5, the lower convex shell 211 and the lower shell 21 are integrally formed, and the upper convex shell 221 and the upper shell 22 are integrally formed, which can improve the structural strength of the insulating shell and reduce the manufacturing cost.

As shown in fig. 1 to 5, the edges and corners of the lower convex shell 211 and the upper convex shell 221, which are used for contacting with the coil winding, are arc-shaped, so that the phenomenon that the coil winding is broken easily due to scratching of the coil winding by the edges and corners of the lower convex shell 211 and the upper convex shell 221 can be avoided, the coil winding is protected, the service life of the coil winding is prolonged, and the quality of the stator assembly is ensured.

Insulating housing 2 is made for modified nylon and/or glass fiber material, can make insulating housing more durable, hardness is higher, extension insulating housing life.

As shown in fig. 1 to 5, in order to enhance the structural strength, the insulating housing 2 is an integrally formed integral structure.

Claims

1. A direct current brushless motor is characterized by comprising a stator shaft (10), wherein a stator assembly (20) which can be fixed relative to the stator shaft (10) is sleeved on the stator shaft (10), a rotor assembly (30) which can rotate relative to the stator shaft (10) is sleeved on the periphery of the stator assembly (20), a motor shell (40) which can rotate relative to the stator shaft (10) and is fixed relative to the rotor assembly (30) is connected onto the stator shaft (10), and the stator assembly (20) and the rotor assembly (30) are positioned on the inner side of the motor shell (40); the rotor assembly (30) comprises a magnetic ring (301) positioned between the stator assembly (20) and the motor shell (40), and a magnetic isolation ring (302) is arranged between the magnetic ring (301) and the inner side wall of the motor shell (40).

2. The brushless dc motor according to claim 1, wherein the motor housing (40) comprises a lower motor housing (401) disposed on the stator shaft (10) and an upper motor housing (402) disposed on the stator shaft (10) and cooperating with the lower motor housing (401), the lower motor housing (401) and the upper motor housing (402) are respectively provided with a plurality of heat dissipation holes (403) communicating with an inner cavity of the motor housing (40), the heat dissipation holes (403) comprise oblique openings (4031) and a spoiler (4032), and the oblique openings (4031) of the lower motor housing (401) face opposite to the oblique openings (4031) of the upper motor housing (402).

3. A brushless dc motor according to claim 2, characterized in that the lower motor housing (401) is connected to the upper motor housing (402) by welding.

4. A dc brushless motor according to any one of claims 1-3, wherein the stator assembly (20) comprises a stator body (1) and an insulating housing (2) for covering the stator body (1), the stator body (1) has a plurality of winding posts (11) uniformly distributed on the circumferential side and along the circumferential direction thereof, a winding slot (12) is formed between two adjacent winding posts (11), and a wire blocking portion (111) is provided on the outer end of each winding post (11), the insulating housing (2) comprises an accommodating portion (23) for accommodating each winding post (11), a first shielding portion (24) for shielding the side wall of the winding slot (12) on the circumferential side of the stator body (1), and a second shielding portion (25) for shielding the side wall of the winding slot (12) on the wire blocking portion.

5. The brushless DC motor according to claim 4, wherein the insulating housing (2) comprises a lower housing (21) and an upper housing (22), the lower housing (21) is provided with a lower protruding shell (211) capable of extending into the winding slot (12), and a lower receiving slot (212) for receiving the winding post (11) is formed on the lower housing (21) and between two adjacent lower protruding shells (211); an upper convex shell (221) which can extend into the winding groove (12) and can be detachably connected with the lower convex shell (211) is arranged on the upper shell (22), and an upper accommodating groove (222) which is opposite to the lower accommodating groove (212) is formed on the upper shell (22) and between two adjacent upper convex shells (221); the accommodating part (23) is formed by a lower accommodating groove (212) and an upper accommodating groove (222), the first shielding part (24) is arranged on the inner bottom walls of the lower convex shell (211) and the upper convex shell (221), and the second shielding part (25) is arranged on the inner top walls of the lower convex shell (211) and the upper convex shell (221).

6. A brushless DC motor according to claim 5, characterized in that a plug-in structure (26) is provided between the lower convex shell (211) and the upper convex shell (221); the inserting structure (26) comprises an inserting convex edge (261) arranged on the lower convex shell (211) and an inserting concave ring (262) which is arranged on the upper convex shell (221) and is used for inserting the inserting convex edge (261) so as to connect the lower shell (21) with the upper shell (22).

7. A brushless DC motor according to claim 5, characterized in that a positioning structure (27) is provided between the lower convex shell (211) and the upper convex shell (221); the positioning structure (27) comprises a positioning inclined part (271) arranged on the lower convex shell (211) and a positioning inclined position (272) which is arranged on the upper convex shell (221) and is matched with the positioning inclined part (271) in a positioning way.

8. A brushless DC motor according to claim 5, characterized in that the lower convex shell (211) is of one-piece construction with the lower housing (21) and the upper convex shell (221) is of one-piece construction with the upper housing (22).

9. A brushless DC motor according to claim 5, characterized in that the angular edges of the lower convex shell (211) and the upper convex shell (221) for contact with the coil windings are curved.

10. A brushless DC motor according to claim 4, characterized in that the insulating housing (2) is made of modified nylon and/or fiberglass material.