CN217720916U

CN217720916U - Low-noise low-vibration brushless direct current motor

Info

Publication number: CN217720916U
Application number: CN202221297060.0U
Authority: CN
Inventors: 王云彬; 田浪; 何亮亮
Original assignee: Suzhou Kaihang Electromotor Co ltd
Current assignee: Suzhou Kaihang Electromotor Co ltd
Priority date: 2022-05-26
Filing date: 2022-05-26
Publication date: 2022-11-01
Anticipated expiration: 2032-05-26

Abstract

The utility model discloses a low noise low vibration brushless DC motor, including the casing, in the casing inner chamber, be equipped with apron, circuit board, stator module, integration rotating assembly and movable vane wheel from top to bottom in proper order, the circuit board sets up in the apron lower extreme, and stator module and movable vane wheel are installed respectively in integration rotating assembly's upper end and lower extreme. The utility model has the advantages that: the rotor assembly is optimized to be an integrated rotating assembly, the ventilation opening is formed in the middle of the casing, the bearing chamber is formed in the middle of the ventilation opening, optimal vibration working conditions can be obtained only by performing dynamic balance correction on the integrated rotating assembly once in the assembling process of the brushless motor, the operation is convenient and simple, the dynamic balance of the motor is effectively controlled, and the vibration of the motor is reduced.

Description

Low-noise low-vibration brushless direct current motor

Technical Field

The utility model relates to a brushless DC motor technical field specifically is a low noise low vibration brushless DC motor.

Background

The user's demand for each performance index of small household electrical appliances is growing day by day, and the noise experience of machine is one of them more important. The motor is used as a core component of the machine, and the optimization of the noise and vibration of the motor is particularly important. The motor is divided into a static support part and a dynamic rotation part from the static and dynamic structural point of view, and the dynamic rotation part provides all possibilities for the vibration of the motor.

Among the current brushless DC motor, rotor subassembly and movable vane are as dynamic rotating part, the pivot is at the pressure equipment magnet steel, behind the balancing ring, carry out first dynamic balance to the rotor subassembly through the turning balancing ring, the rotor subassembly is passing through the pressure equipment bearing, the assembly casing, and a bracket, behind the movable vane, carry out second dynamic balance to the complete machine through the turning movable vane, the separation assembly of motor rotating part, the motor needs to carry out twice dynamic balance, the operation degree of difficulty is big, the balanced effect is poor, the motor easily vibrates, stator module fixes inside the casing, the gap between stator module and casing is as the vent, the wind channel is narrow, the wind direction circulation is not smooth, the motor high-speed operation produces great noise.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a low noise low vibration brushless DC motor to solve the problem that proposes in the above-mentioned background art.

In order to achieve the above object, the utility model provides a following technical scheme: the utility model provides a low noise low vibration brushless DC motor, includes the casing, in the casing inner chamber, from top to bottom be equipped with apron, circuit board, stator module, integration rotating assembly and movable vane wheel in proper order, the circuit board set up in the apron lower extreme, stator module with movable vane wheel install respectively in integration rotating assembly's upper end and lower extreme.

Further, be equipped with the bearing room in the casing upper portion inner chamber, the bearing outdoor side is equipped with a plurality of vents with the circumferencial direction, and the bearing can directly be installed in the bearing room inside, and a plurality of vents can carry out abundant the giving off to the heat that the motor is inside to produce in addition.

Furthermore, a plurality of supporting arms are arranged on the outer side of the lower portion of the machine shell in the circumferential direction, and the supporting arms replace a conventional support, so that the time cost of materials and processing is saved.

Furthermore, the integrated rotating assembly comprises a rotating shaft, magnetic steel arranged on the upper portion of the rotating shaft and a bearing arranged on the lower portion of the rotating shaft, and the bottom of the rotating shaft and the movable impeller are fixedly arranged.

Furthermore, the lower ends of the magnetic steel and the bearing are respectively provided with a first balance ring and a second balance ring.

Furthermore, the bearing is an integrated bearing, an upper bearing and a lower bearing are replaced by the integrated bearing, and the fixing can be completed only by being pressed in a bearing chamber of the shell.

Advantageous effects

The low-noise low-vibration brushless direct current motor optimizes the rotor assembly into an integrated rotating assembly, the middle part of the shell is provided with the vent, the middle part of the vent is provided with the bearing chamber, the optimal vibration working condition can be obtained only by performing dynamic balance correction on the integrated rotating assembly once in the assembling process of the brushless motor, the operation is convenient and simple, the dynamic balance of the motor is effectively controlled, and the vibration of the motor is reduced;

stator module assembles in the casing top, and the inside wind channel of motor becomes the vent of the inside independent design of casing by the gap between stator module and casing, and the wind direction circulation is more smooth and easy, and motor running noise obtains reducing, adopts the integration bearing, replaces upper and lower bearing, only needs the pressure to adorn in the casing bearing indoor can accomplish fixedly, and is equipped with the use of the replacement conventional support of support arm on the casing, has also saved the use of material when saving process time.

Drawings

Fig. 1 is a schematic view of the structure of the housing of the present invention;

FIG. 2 is a schematic sectional view of the overall structure of the present invention;

fig. 3 is a schematic cross-sectional view of the integrated rotating assembly of the present invention;

FIG. 4 is a schematic cross-sectional view of a prior art overall structure;

FIG. 5 is a schematic cross-sectional view of a prior art rotor assembly.

Reference numerals

1-machine shell, 2-cover plate, 3-circuit board, 4-stator component, 5-integrated rotating component, 6-movable impeller, 7-bearing chamber, 8-ventilation opening, 9-supporting arm, 10-rotating shaft, 11-magnetic steel, 12-bearing, 13-first balance ring, 14-second balance ring, 15-upper bearing, 16-lower bearing, 17-third balance ring, 18-second magnetic steel, 19-second machine shell, 20-upper support, 21-second stator component, 22-rotor component, 23-second movable impeller and 24-second rotating shaft.

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.

Examples

As shown in fig. 1-3, a low-noise low-vibration brushless dc motor includes a casing 1, a cover plate 2, a circuit board 3, a stator assembly 4, an integrated rotating assembly 5 and a movable impeller 6 are sequentially disposed in an inner cavity of the casing 1 from top to bottom, the circuit board 3 is disposed at a lower end of the cover plate 2, and the stator assembly 4 and the movable impeller 6 are respectively mounted at an upper end and a lower end of the integrated rotating assembly 5.

The middle part of the rotor component is an integrated bearing, two sides of the bearing respectively comprise a balance ring, the lower end of the rotating shaft is provided with a movable impeller, the upper end of the rotating shaft is provided with magnetic steel, and the rotor component with the movable impeller forms a new integrated rotating component; the casing middle part is equipped with the vent, is the bearing room in the middle of the vent, and integration rotating assembly is located the casing intracavity, and the bearing is fixed in the bearing room, and the casing upper end is equipped with stator module, and the stator module upper end is equipped with circuit board and apron.

The rotating part rotor assembly and the movable impeller are directly assembled and connected to form a new integrated rotating assembly, the static supporting shell part and the dynamic rotating part of the brushless motor are separated, the optimal vibration working condition can be obtained only by performing dynamic balance correction on the integrated rotating assembly once in the assembling process of the brushless motor, the operation is convenient and simple, the dynamic balance of the motor is effectively controlled, and the vibration of the motor is reduced.

Stator module assembles in the casing top, and the inside wind channel of motor becomes the vent of the inside independent design of casing by the gap between stator module and the casing, and the wind direction circulation is more smooth and easy, and motor noise in operation obtains reducing.

The integrated bearing is adopted to replace an upper bearing and a lower bearing, the integrated bearing can be fixed only by being pressed in a bearing chamber of the machine shell, the supporting arm is arranged on the machine shell to replace a conventional support, and the design of a new structure saves the processing time and the use of materials.

Finally, it should be noted that: although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that modifications may be made to the embodiments described above, or equivalents may be substituted for elements thereof. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the content of the present invention within the protection scope of the present invention.

Claims

1. The utility model provides a low noise low vibration brushless DC motor which characterized in that: including casing (1), in casing (1) inner chamber, be equipped with apron (2), circuit board (3), stator module (4), integration rotating assembly (5) and movable vane wheel (6) from top to bottom in proper order, circuit board (3) set up in apron (2) lower extreme, stator module (4) with movable vane wheel (6) install respectively in the upper end and the lower extreme of integration rotating assembly (5).

2. A low-noise low-vibration brushless dc motor according to claim 1, wherein: a bearing chamber (7) is arranged in an inner cavity at the upper part of the machine shell (1), and a plurality of ventilation openings (8) are formed in the outer side of the bearing chamber (7) in the circumferential direction.

3. A low-noise low-vibration brushless dc motor according to claim 1, wherein: the outer side of the lower part of the machine shell (1) is provided with a plurality of supporting arms (9) along the circumferential direction.

4. A low-noise low-vibration brushless dc motor according to claim 1, wherein: the integrated rotating assembly (5) comprises a rotating shaft (10), magnetic steel (11) arranged on the upper portion of the rotating shaft and a bearing (12) arranged on the lower portion of the rotating shaft (10), and the bottom of the rotating shaft (10) and the movable impeller (6) are fixedly arranged.

5. The low-noise low-vibration brushless dc motor according to claim 4, wherein: the lower ends of the magnetic steel (11) and the bearing (12) are respectively provided with a first balance ring (13) and a second balance ring (14).

6. The low-noise low-vibration brushless dc motor according to claim 4, wherein: the bearing (12) is an integrated bearing.