CN110649744A

CN110649744A - Brushless mute motor

Info

Publication number: CN110649744A
Application number: CN201911058561.6A
Authority: CN
Inventors: 孙新年
Original assignee: Henan Limpl Environmental Protection Technology Co Ltd
Current assignee: Henan Limpl Environmental Protection Technology Co Ltd
Priority date: 2019-11-01
Filing date: 2019-11-01
Publication date: 2020-01-03

Abstract

The invention provides a brushless mute motor, comprising: end cover, bearing mount, bearing, pivot, motor stator and motor rotor. Wherein, have the bolt hole on the end cover for fix this silence motor. The bearing fixing frame is a flexible support with a certain elastic modulus, is fixed with the end cover and is used for installing the bearing. The rotating shaft is arranged on the bearing fixing frame through a bearing. The motor stator is fixed on the bearing fixing frame, the motor rotor surrounds the outer side of the motor stator, and the motor rotor is fixed on the rotating shaft. The brushless mute motor provided by the invention can be used for carrying out the dynamic balance adjustment on the rotating shaft through the damping structure, and also can be used for blocking the vibration transmission of the rotating shaft, reducing the noise and prolonging the service life of the motor.

Description

Brushless mute motor

Technical Field

The invention relates to the technical field of motors, in particular to a brushless mute motor, which relates to motor noise reduction.

Background

No matter domestic or foreign brushless motor's bearing all adopts interference fit installation in recent years, and the bearing installation need use the press installation, and the press installation can produce certain bad product to there is certain safe risk in the press in the use, assembles the condition that the workman often appears crushing the finger in recent years, and this kind of potential safety hazard is not stopped completely. And the precision problem of installation error and bearing itself can bring the vibration for the motor, wants noise reduction need do dynamic balance to the motor, has increased production cycle and cost to hardly guarantee rotor dynamic balance's stability, lead to the vibration and the noise of motor can not accurate control.

The rotating shaft fixed by the rotor can receive acting forces in different directions when rotating, the unbalanced acting forces can generate vibration, and noise can be generated at the same time. The vibration can bring certain destruction to equipment, and the noise can influence the environmental quality of people's production, life. Effectively reduce the running noise of fan, will help improving the noise environment in our production and life.

The invention aims at the problems, and improves the bearing and the rotating shaft structure of the motor, so that the vibration of the motor is reduced, the running noise is further reduced, and the installation is easy.

Disclosure of Invention

The invention aims to overcome the defects of the prior art and provides a brushless mute motor. This brushless silence motor carries out the dynamic balance regulation through shock-absorbing structure countershaft, but also can obstruct the vibration transmission of countershaft, the production of noise reduction.

The invention provides a brushless mute motor, comprising: the motor comprises an end cover, a bearing fixing frame, a bearing, a rotating shaft, a motor stator and a motor rotor, wherein the end cover is provided with a bolt hole for fixing the mute motor; the bearing fixing frame is a flexible support with a certain elastic modulus, is fixed with the end cover and is used for mounting the bearing; the rotating shaft is arranged on the bearing fixing frame through the bearing; and the motor stator is fixed on the bearing fixing frame, the motor rotor surrounds the outer side of the motor stator, and the motor rotor is fixed on the rotating shaft.

In an embodiment of the present invention, the mute motor further includes: and the elastic fixing piece is arranged between the inner ring of the bearing and the rotating shaft and used for fixing the bearing and damping the rotating shaft.

The elastic fixing piece is made of a flexible material or an elastic piece with a certain elastic modulus after being processed.

In a specific embodiment of the present invention, at least one of the bearings is disposed in the bearing fixing frame, and is used for mounting the rotating shaft.

Wherein, the bearing fixing frame and the bearing are in interference fit.

In a specific embodiment of the present invention, the bearing fixing frame is made of a flexible material.

In an embodiment of the present invention, the mute motor further includes: and the control mainboard is fixed on the bearing fixing frame and used for being connected with a power supply to drive the motor rotor to rotate.

In a specific embodiment of the present invention, the motor rotor includes a rotor fixing frame, and the rotor fixing frame is fixed on the rotating shaft and rotates along with the rotating shaft.

The outer diameter of the fixing position of the rotor fixing frame and the rotating shaft is larger than the inner diameter of the bearing, and the rotor fixing frame and the rotating shaft are used for limiting the axial displacement of the bearing.

According to the above embodiments, the brushless mute motor provided by the present invention has the following advantages: this silence motor is more outstanding for current motor in the aspect of the damping of making an uproar that falls, utilizes flexible material to carry out the dynamic balance adjustment, further adjusts bearing installation error, further improves the stability of pivot. In addition, the flexible material can absorb energy and reduce vibration, so that the noise can be further reduced, and the vibration of the motor during operation is reduced.

It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the invention, as claimed.

Drawings

The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate exemplary embodiments of the invention and together with the description, serve to explain the principles of the invention.

Fig. 1 is a top view of a brushless mute motor according to the present invention.

Fig. 2 is a sectional view taken along a line a-a of a first embodiment of a brushless mute motor according to the present invention.

Fig. 3 is a sectional view taken along line a-a of a second embodiment of the brushless mute motor according to the present invention.

Description of reference numerals:

1-end cover, 2-bearing fixing frame, 3-bearing, 4-rotating shaft, 5-motor stator, 6-motor rotor, 7-elastic fixing piece and 8-control mainboard;

61-rotor fixing frame.

Detailed Description

Reference will now be made in detail to various exemplary embodiments of the invention, the detailed description should not be construed as limiting the invention but as a more detailed description of certain aspects, features and embodiments of the invention.

It will be apparent to those skilled in the art that various modifications and variations can be made in the specific embodiments of the present disclosure without departing from the scope or spirit of the disclosure. Other embodiments will be apparent to those skilled in the art from consideration of the specification. The specification and examples are exemplary only.

Fig. 1 is a top view of a brushless mute motor according to the present invention. The end cap 1 in the figure has three bolt holes for fixing the motor. Fig. 2 is a sectional view of a first embodiment of a brushless mute motor according to the present invention, taken along the line a-a. In the embodiment shown in the figure, the silent motor comprises: end cover 1, bearing mount 2, bearing 3, pivot 4, motor stator 5 and motor rotor 6. Wherein, the end cover 1 is provided with a bolt hole for fixing the mute motor. As shown in FIG. 1, the bolt holes are distributed on the end cover 1 in a regular triangle shape in the embodiment, and the stability of the triangle shape is better, so that the stability of the motor is better.

The bearing fixing frame 2 is a flexible support with a certain elastic modulus and is fixed with the end cover 1, and the bearing fixing frame 2 is used for installing the bearing 3. In this embodiment, the bearing fixing frame 2 is made of a flexible material, and the flexible material can absorb energy and reduce vibration transmission.

The rotating shaft 4 is arranged on the bearing fixing frame 2 through the bearing 3. In this embodiment, at least one bearing 3 is disposed in the bearing fixing frame 2, and the bearing fixing frame 2 and the bearing 3 are in interference fit. In addition, the rotating shaft 4 and the bearing 3 are also in interference fit. In this embodiment, the bearing 3 is limited to the production precision and the installation precision, and a certain error may occur in the production and installation processes of the bearing 3. The inner and outer rings of the bearing 3 cannot be perfectly rounded during production and the balls cannot be perfectly spherical, which leads to the bearing 3 being shaken during use. As the service time increases, the wobbling of the bearing 3 increases with the severity of the wear, which in turn leads to a reduced service life. In the concrete implementation of this embodiment, the rotatory 3 inner rings of bearing that drive of pivot 4 rotate, because the installation and shaking that production error produced can transmit bearing fixing frame 2, bearing fixing frame 2 exerts the reaction force to bearing 3, the concentricity between a plurality of bearings 3 can be adjusted to the reaction force, make it as far as possible to be unanimous, and then reduce the axial and radial displacement of pivot 4, make the rotation of pivot 4 more stable, the life of extension bearing 3 has and reduced motor running noise.

The motor stator 5 is fixed on the bearing fixing frame 2, the motor rotor 6 surrounds the outer side of the motor stator 5, and the motor rotor 6 is fixed on the rotating shaft 4. In a specific embodiment of this embodiment, the motor rotor 6 includes a rotor fixing frame 61, and the rotor fixing frame 61 is fixed on the rotating shaft 4 and rotates along with the rotating shaft 4. The outer diameter of the fixing position of the rotor fixing frame 61 and the rotating shaft 4 is larger than the inner diameter of the bearing 3, the axial displacement of the bearing 3 can be limited by the fixing connection position, and the stability of the bearing 3 in operation is guaranteed.

In a specific implementation manner of this embodiment, the mute motor further includes: and the control main board 8 is fixed on the bearing fixing frame 2 and used for connecting a power supply to drive the motor rotor 6 to rotate.

Fig. 3 shows a sectional view taken along the line a-a of a second embodiment of the brushless mute motor according to the present invention. In the embodiment shown in the drawing, the mute motor further includes, in comparison with the first embodiment: and the elastic fixing piece 7 is arranged between the inner ring of the bearing 3 and the rotating shaft 4, and the elastic fixing piece 7 is used for fixing the bearing 3 and damping the rotating shaft 4. The contact position of the elastic fixing piece 7 and the bearing 3 is a concave structure, so that the bearing 3 can be axially fixed. The elastic counter force applied by the elastic fixing part 7 to the rotating shaft 4 is a flexible force, so that the rotating precision of the rotating shaft 4 can be adjusted, and the rotating shaft 4 can run more stably. And then through the rotation precision of pivot 4 adjustment bearing 3, with the more even of the rotating clearance between the inner and outer ring of bearing 3 for 3 rotatory more steady of bearing slows down the wearing and tearing speed of the inner and outer ring of bearing 3 and ball, prolongs the life of bearing 3, and then the life of extension motor. The provision of the resilient fixing member 7 further reduces vibration so that the noise of the motor is also reduced.

In a specific embodiment of this embodiment, the elastic fixing member 7 is made of a flexible material or an elastic member with a certain elastic modulus after being processed. In this embodiment, the elastic member may be made of metal, or may be made of other elastic materials. The flexible material or the elastic member with a certain elastic modulus after being processed has a certain elasticity, and can instantly feed back elastic counterforce after being stressed, so as to perform stability adjustment on the rotating shaft 4. The advantage that sets up elastic fixing piece 7 is convenient for carry out dynamic balance adjustment when the design production of motor, and this is more showing than directly carrying out dynamic balance adjustment labour saving and time saving to bearing 3, and the adjustment effect, great reduction the cost of manufacture of motor.

The foregoing is merely an illustrative embodiment of the present invention, and any equivalent changes and modifications made by those skilled in the art without departing from the spirit and principle of the present invention should fall within the protection scope of the present invention.

Claims

1. A brushless mute motor, comprising:

an end cover (1), a bearing fixing frame (2), a bearing (3), a rotating shaft (4), a motor stator (5) and a motor rotor (6),

the end cover (1) is provided with a bolt hole for fixing the mute motor;

the bearing fixing frame (2) is a flexible support with a certain elastic modulus, is fixed with the end cover (1) and is used for mounting the bearing (3);

the rotating shaft (4) is arranged on the bearing fixing frame (2) through the bearing (3); and

the motor stator (5) is fixed on the bearing fixing frame (2), the motor rotor (6) surrounds the outer side of the motor stator (5), and the motor rotor (6) is fixed on the rotating shaft (4).

2. The brushless mute motor of claim 1, further comprising: elastic fixing piece (7), elastic fixing piece (7) set up in the inner ring of bearing (3) with between pivot (4), be used for carrying on the fixed of bearing (3) and the damping of pivot (4).

3. The brushless silent motor as claimed in claim 2, wherein said elastic fixing member (7) is a flexible material or an elastic member having a certain elastic modulus after processing.

4. The brushless noise motor according to claim 1, wherein at least one of said bearings (3) is provided in said bearing holder (2) for mounting said shaft (4).

5. The brushless mute motor as claimed in claim 4, wherein there is an interference fit between the bearing holder (2) and the bearing (3).

6. The brushless silent motor according to claim 1, wherein said bearing holder (2) is of flexible material.

7. The brushless mute motor of claim 1, further comprising: and the control main board (8) is fixed on the bearing fixing frame (2) and is used for connecting a power supply to drive the motor rotor (6) to rotate.

8. The brushless mute motor as claimed in claim 1, wherein the motor rotor (6) comprises a rotor holder (61), the rotor holder (61) being fixed to the shaft (4) to rotate with the shaft (4).

9. The brushless noise motor according to claim 8, wherein an outer diameter of a fixing place of the rotor holder (61) to the rotation shaft (4) is larger than an inner diameter of the bearing (3) for limiting an axial displacement of the bearing (3).