CN218449629U

CN218449629U - Low-noise brushless motor

Info

Publication number: CN218449629U
Application number: CN202221885688.2U
Authority: CN
Inventors: 康义; 徐力; 徐芩艳
Original assignee: Suzhou Yongbao Electromechanical Technology Co ltd
Current assignee: Suzhou Yongbao Electromechanical Technology Co ltd
Priority date: 2022-07-20
Filing date: 2022-07-20
Publication date: 2023-02-03
Anticipated expiration: 2032-07-20

Abstract

The utility model belongs to the technical field of machinery, a low noise brushless motor is related to, it has solved the great scheduling problem of current brushless motor noise. The brushless motor comprises a stator core, a stator is fixed on the stator core, a winding coil is arranged on the stator, a rotor is sleeved outside the stator, a magnet corresponding to the winding coil is fixed on an inner ring of the rotor, the rotor further comprises a rotor yoke portion matched with the stator core in a rolling mode, a lubricating oil path is arranged in the stator core, one end of the lubricating oil path penetrates through the outer end face of the stator core, the other end of the lubricating oil path extends to the contact face of the stator core and the rotor yoke portion, and a coaxial output shaft is further fixed on the rotor yoke portion. Because the stator core is provided with the lubricating oil way, lubricating oil can enter the contact surface of the stator core and the rotor yoke part through the lubricating oil way, so that the friction force between the rotor yoke part and the stator core is reduced, and the noise generated during the operation of the motor is reduced.

Description

Low-noise brushless motor

Technical Field

The utility model belongs to the technical field of machinery, a low noise brushless motor is related to.

Background

The brushless motor is composed of a motor main body and a driver, and is a typical electromechanical integration product. Brushless motors are brushless and commutator-free motors, also known as commutator-free motors, which are widely used in many fields. The existing brushless motors are various in types, and in the application of some large-scale equipment, the brushless motors required to be used are higher in noise caused by higher power, so that the hearing of people working in the environment for a long time can be damaged, the vibration is larger, and the failure rate is greatly improved.

Patent CN215528750U discloses a low noise brushless DC motor, including motor body, motor body includes shell, stator, rotor, heat radiation fins, bottom plate and base, the bottom plate is installed to the bottom of shell, the surface at the base is installed to the bottom plate, set up flutedly in the centre of base, the rubber pad is equipped with in the subsides on the inner wall of recess, the internally mounted of shell has the stator, the draw-in groove has been seted up on the surface of stator, the inside cover of draw-in groove is equipped with the lantern ring, the rubber circle has been laid to the inboard of lantern ring, the side of the lantern ring is connected with the bracing piece, be provided with the winding on the inner wall of stator, the rotor is installed to the centre of stator, the rear end cover of rotor is equipped with the bearing, the bearing is installed in telescopic inside, furthest's reduction transmission effect to can guarantee the degree of stability between stator and the rotor.

However, when the motor rotor rotates, contact friction occurs between the motor rotor and the housing, noise is easy to generate, and the problem is solved by adding a bearing in the prior art.

SUMMERY OF THE UTILITY MODEL

The utility model discloses a there is above-mentioned problem to current technique, has proposed a low noise brushless motor, the utility model aims to solve the technical problem that: how to reduce the noise when the motor runs.

The purpose of the utility model can be realized by the following technical proposal:

the utility model provides a low noise brushless motor, a serial communication port, brushless motor includes stator core, be fixed with the stator on the stator core, be provided with the winding coil on the stator, the stator overcoat is equipped with the rotor, the rotor inner circle be fixed with the corresponding magnet of winding coil, the rotor still have with stator core roll complex rotor yoke portion, be provided with lubricating oil in the stator core, lubricating oil's one end runs through stator core's outer terminal surface, lubricating oil's the other end extends to the contact surface of stator core and rotor yoke portion, still be fixed with coaxial output shaft on the rotor yoke portion.

The working principle is as follows: when the motor runs, the winding coil on the stator is electrified and is matched with the magnet on the rotor to drive the rotor to rotate, so that the output shaft is driven to rotate. Because the stator core is provided with the lubricating oil way, lubricating oil can enter the contact surface of the stator core and the rotor yoke part through the lubricating oil way, so that the friction force between the rotor yoke part and the stator core is reduced, and the noise generated during the operation of the motor is reduced.

In the aforementioned low-noise brushless motor, the lubricating oil path is L-shaped, one end of the lubricating oil path is provided with a sealing plug, the other end of the lubricating oil path is provided with a first felt, one end of the first felt can contact with the yoke of the rotor, and the other end of the first felt is soaked in the lubricating oil of the lubricating oil path. When the motor runs, the first felt can convey lubricating oil in a lubricating oil way to a yoke part of the rotor, so that lubrication is realized.

In the above-mentioned brushless motor with low noise, rotor yoke portion is provided with the annular boss with stator core matched with, the inner of output shaft with the annular boss cooperation forms annular groove, stator core is last have with annular groove matched with annular protruding. Through the cooperation of annular arch and annular groove, can realize the axial fixity of rotor and stator core.

In the aforementioned brushless motor with low noise, the stator core is provided with an auxiliary oil path connected to the lubricating oil path, the auxiliary oil path extends to the annular groove, a second felt is provided in the auxiliary oil path, and the second felt extends to the annular groove. The design has the second asphalt felt, and lubricating oil can get into annular groove department to lubricate the junction of output shaft and stator core, noise reduction.

In the aforementioned low-noise brushless motor, a threaded section is provided on the stator core, a nut is connected to the threaded section through a thread, the brushless motor further comprises a housing, the housing is sleeved on the stator core, one side of the housing is in contact with the stator, the other side of the housing is in contact with the nut, and the outer edge of the housing is close to the yoke of the rotor. Through the cooperation of nut and stator, can realize the fixed of casing to form sealedly with the cooperation of rotor yoke portion, because the nut is adjustable, consequently can be used to the position of adjusting the casing.

In the low-noise brushless motor, the outer edge of the shell is provided with the mounting hole, and grease is arranged in the mounting hole. The design has the grease on the casing, produces great friction when can avoiding contacting with rotor yoke portion, because the casing is through can not taking place the contact with rotor yoke portion, consequently adopts solid-state grease to prevent better.

Compared with the prior art, the utility model has the advantages of it is following:

the stator core is provided with the lubricated oil circuit, and lubricating oil accessible lubricated oil circuit gets into the contact surface of stator core and rotor yoke portion to reduce the frictional force between rotor yoke portion and the stator core, reduce the noise that produces during the motor operation.

Drawings

Fig. 1 is a schematic structural view of the present brushless motor.

Fig. 2 is a sectional view of the present brushless motor.

In the figure, 1, a stator core; 2. a stator; 3. a winding coil; 4. a magnet; 5. a rotor yoke portion; 6. a lubrication oil path; 7. an output shaft; 8. a first asphalt felt; 9. an annular boss; 10. An annular groove; 11. an annular projection; 12. an auxiliary oil path; 13. a second asphalt felt; 14. a threaded segment; 15. a nut; 16. a housing; 17. and (3) grease.

Detailed Description

The following are specific embodiments of the present invention and the accompanying drawings are used to further describe the technical solution of the present invention, but the present invention is not limited to these embodiments.

As shown in fig. 1 and 2, the brushless motor includes a stator core 1, a stator 2 is fixed on the stator core 1, a winding coil 3 is provided on the stator 2, a rotor is sleeved outside the stator 2, a magnet 4 corresponding to the winding coil 3 is fixed on an inner ring of the rotor, the rotor further has a rotor yoke 5 in rolling fit with the stator core 1, a lubricating oil path 6 is provided in the stator core 1, one end of the lubricating oil path 6 penetrates through an outer end face of the stator core 1, the other end of the lubricating oil path 6 extends to a contact face between the stator core 1 and the rotor yoke 5, and a coaxial output shaft 7 is further fixed on the rotor yoke 5.

Preferably, in this embodiment, the lubricating oil path 6 is L-shaped, one end of the lubricating oil path 6 is provided with a sealing plug, the other end of the lubricating oil path 6 is provided with a first felt 8, one end of the first felt 8 can contact with the rotor yoke 5, and the other end of the first felt 8 is soaked in the lubricating oil of the lubricating oil path 6.

As shown in fig. 1 and 2, specifically, the rotor yoke 5 is provided with an annular boss 9 engaged with the stator core 1, the inner end of the output shaft 7 is engaged with the annular boss 9 to form an annular groove 10, and the stator core 1 is provided with an annular protrusion 11 engaged with the annular groove 10.

Preferably, an auxiliary oil path 12 connected with the lubricating oil path 6 is arranged on the stator core, the auxiliary oil path 12 extends to the annular groove 10, a second felt 13 is arranged in the auxiliary oil path 12, and the second felt 13 extends to the annular groove 10.

As shown in fig. 1 and 2, a threaded section 14 is provided on the stator core 1, a nut 15 is connected to the threaded section 14 in a threaded manner, the brushless motor further includes a housing 16, the housing 16 is sleeved on the stator core 1, one side of the housing 16 is in contact with the stator 2, the other side of the housing 16 is in contact with the nut 15, and the outer edge of the housing 16 is close to the rotor yoke portion 5. The outer edge of the shell 16 is provided with a mounting hole, and grease 17 is arranged in the mounting hole.

The working principle of the utility model is as follows: when the motor operates, a winding coil on the stator is electrified and is matched with a magnet on the rotor to drive the rotor to rotate, so that the output shaft is driven to rotate. Because the stator core is provided with the lubricating oil way, lubricating oil can enter the contact surface of the stator core and the rotor yoke part through the lubricating oil way, and therefore the friction force between the rotor yoke part and the stator core is reduced. The design has the second asphalt felt, and lubricating oil can get into annular groove department to lubricate the junction of output shaft and stator core, noise reduction.

The specific embodiments described herein are merely illustrative of the spirit of the invention. Various modifications, additions and substitutions for the specific embodiments described herein may be made by those skilled in the art without departing from the spirit of the invention or exceeding the scope of the invention as defined in the accompanying claims.

Claims

1. The utility model provides a low noise brushless motor, its characterized in that, brushless motor includes stator core (1), be fixed with stator (2) on stator core (1), be provided with winding coil (3) on stator (2), stator (2) overcoat is equipped with the rotor, the rotor inner circle be fixed with corresponding magnet (4) of winding coil (3), the rotor still have with stator core (1) roll complex rotor yoke portion (5), be provided with lubricating oil circuit (6) in stator core (1), the outer terminal surface of stator core (1) is run through to the one end of lubricating oil circuit (6), the other end of lubricating oil circuit (6) extends to the contact surface of stator core (1) and rotor yoke portion (5), still be fixed with coaxial output shaft (7) on rotor yoke portion (5).

2. The brushless motor with low noise according to claim 1, wherein the lubricating oil path (6) is L-shaped, one end of the lubricating oil path (6) is provided with a sealing plug, the other end of the lubricating oil path (6) is provided with a first felt (8), one end of the first felt (8) can be in contact with the rotor yoke (5), and the other end of the first felt (8) is soaked in the lubricating oil of the lubricating oil path (6).

3. The low-noise brushless motor according to claim 2, wherein the rotor yoke (5) is provided with an annular boss (9) which is matched with the stator core (1), the inner end of the output shaft (7) is matched with the annular boss (9) to form an annular groove (10), and the stator core (1) is provided with an annular protrusion (11) which is matched with the annular groove (10).

4. The brushless electric machine according to claim 3, wherein an auxiliary oil path (12) is provided on the stator core, the auxiliary oil path (12) is connected to the lubricating oil path (6), the auxiliary oil path (12) extends to the annular groove (10), a second linoleum (13) is provided in the auxiliary oil path (12), and the second linoleum (13) extends to the annular groove (10).

5. The brushless motor according to claim 4, wherein the stator core (1) is provided with a threaded section (14), the threaded section (14) is in threaded connection with a nut (15), the brushless motor further comprises a housing (16), the housing (16) is sleeved on the stator core (1), one side of the housing (16) is in contact with the stator (2), the other side of the housing (16) is in contact with the nut (15), and the outer edge of the housing (16) is close to the rotor yoke (5).

6. A brushless electric machine according to claim 5, characterized in that the housing (16) has mounting holes in its outer periphery, in which the grease (17) is disposed.