CN222339152U - Small-size brushless motor of making an uproar falls - Google Patents

Abstract

The utility model discloses a noise-reducing small brushless motor in the field of brushless motors, which comprises a shell and a sealing cover, wherein a stator and a rotor are arranged in the shell, the shell is in sealing connection with the sealing cover, an elastic rubber layer is adhered to the outer surface of the stator, a sound-absorbing cotton layer is adhered to the inner surface of the rotor, a main control circuit board is arranged in the shell, and a sound-absorbing foam layer is adhered to the surface of the main control circuit board.

Description

Small-size brushless motor of making an uproar falls

Technical Field

The utility model relates to the field of brushless motors, in particular to a small-sized noise-reduction brushless motor.

Background

A small brushless motor, as the name implies, refers to a brushless motor that is relatively small in size and does not have a motor carbon brush. The motor has wide application in various fields, and has the characteristics of small volume, light weight, high efficiency and low noise. The advantages of brushless motors make them suitable for applications where specific requirements are placed on motor volume, efficiency and rotational speed, such as intelligent kitchen, medical instruments, pneumatic tools, laboratory instruments, etc. Structurally, a small brushless motor is constituted by a motor main body and a controller, which is a typical electromechanical integrated product. The motor stator consists of a pair of independent windings (coils), and the rotor is a permanent magnet. Although the control loop of the brushless motor is relatively complex, the automatic control mode of the brushless motor avoids the starting winding problem of the light-load starting synchronous motor under the direct-current variable-frequency variable-speed, and vibration and step-out which can be generated when the load suddenly changes. In principle, the small brushless motor adopts an electronic reversing device and a Hall sensor. When the motor is running, the coil remains stationary while the poles rotate. This design allows for a longer service life and better performance of the brushless motor. However, because of the complexity of the control loop, there are stringent requirements for the selection and use of components, and therefore, stringent reliability tests are required to ensure quality before use. In general, small brushless motors have become an indispensable important component in modern industry and electronic products by virtue of their unique advantages and wide application fields.

The existing small brushless motor has the defects that mechanical noise and electromagnetic noise are generated when the small brushless motor works, the mechanical noise is mainly generated by friction, the electromagnetic noise is mainly caused by electromagnetic vibration due to mutual contact and friction of mechanical parts in the motor in the moving process, and the noise is generated due to the fact that an air gap magnetic field of the motor acts to generate electromagnetic force, radial force is generated on a stator and a rotor, and accordingly vibration and noise are caused. But lack inside structure of making an uproar falls when traditional small-size motor installation at present, mechanical noise and the electromagnetic noise that produce when leading to small-size motor drive are difficult to filter and fall the noise for small-size motor during operation produces great noise, influences small-size motor result of use.

Disclosure of utility model

In order to overcome the defects of the prior art, the utility model provides a small-sized brushless motor with noise reduction, which can effectively solve the technical problem of high noise of the existing brushless motor.

The technical scheme includes that the noise-reducing small brushless motor comprises a shell and a sealing cover, wherein a stator and a rotor are arranged in the shell, the shell is in sealing connection with the sealing cover, an elastic rubber layer is bonded on the outer surface of the stator, a sound-absorbing cotton layer is bonded on the inner surface of the rotor, a main control circuit board is arranged in the shell, and a sound-absorbing foam layer is bonded on the surface of the main control circuit board.

Further, the elastic rubber layer is bonded to the housing.

Further, a plurality of buckling blocks are fixedly arranged on the side face of the shell, a plurality of positioning grooves are formed in the surface of the main control circuit board, and the buckling blocks are buckled with the positioning grooves.

Further, a main shaft crossing the stator is arranged in the middle of the stator, a round hole is formed in the surface of the main control circuit board, and the main shaft penetrates through the round hole.

Further, an input bearing is fixedly arranged at one end of the main shaft, an output bearing is fixedly arranged at the other end of the main shaft, the main shaft penetrates through the sealing cover, and the output bearing is in rotary connection with the sealing cover.

Further, the surface of the main control circuit board is provided with a connecting wire, and the connecting wire penetrates through the sealing cover and extends to the outside of the sealing cover.

Compared with the prior art, the noise-reducing small brushless motor has the beneficial effects that the noise generated during operation of the brushless motor can be better absorbed by arranging the sound-absorbing cotton layer, the elastic rubber layer and the sound-absorbing foam layer, and meanwhile, the transmission of sound can be blocked by the closed shell structure, so that the noise-reducing effect is greatly improved.

Drawings

FIG. 1 is a perspective view of a small brushless motor with noise reduction according to the present utility model;

FIG. 2 is a schematic view of the internal structure of a small brushless motor with noise reduction according to the present utility model;

FIG. 3 is a side view of a small brushless motor with noise reduction according to the utility model;

Fig. 4 is a schematic view showing an internal structure of a housing of a small-sized brushless motor with noise reduction according to the present utility model;

Fig. 5 is a schematic structural view of a stator and a rotor of a small-sized brushless motor with noise reduction according to the present utility model.

Reference numerals in the drawings:

1-shell, 2-connecting wire, 3-sealing cover, 4-stator, 5-elastic rubber layer, 6-rotor, 7-main control circuit board, 8-fastening block, 9-sound-absorbing cotton layer, 10-main shaft, 11-output bearing, 12-round hole, 13-input bearing and 14-positioning groove.

Detailed Description

The following description of the embodiments of the present utility model will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present utility model, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.

As shown in fig. 1-5, a small-size brushless motor of making an uproar falls, including casing 1 and sealed lid 3, the inside of casing 1 is provided with stator 4 and rotor 6, casing 1 with sealed lid 3 carries out sealing connection, the surface of stator 4 bonds and has elastic rubber layer 5, and elastic rubber layer 5 bonds with casing 1, has strengthened the leakproofness and the stability between stator 4 and the casing 1, helps preventing noise and vibration's transmission, and simultaneously, this kind of structure can also effectively protect stator 4, prolongs motor's life, the internal surface of rotor 6 bonds and has sound-absorbing cotton layer 9, the inside of casing 1 is provided with main control circuit board 7, the surface bonding of main control circuit board 7 has sound-absorbing foam layer.

The elastic rubber layer 5 with the casing 1 bonds, the fixed a plurality of buckling pieces 8 that are provided with in side of casing 1, the surface of main control circuit board 7 is provided with a plurality of constant head tanks 14, a plurality of buckling pieces 8 are connected with a plurality of constant head tanks 14 in the buckling, through buckling piece 8 and constant head tanks 14's buckling connection, the quick installation and the dismantlement of main control circuit board 7 have been realized, this kind of design has simplified the equipment and the maintenance process of motor, improved work efficiency, the centre of stator 4 is provided with the main shaft 10 that crosses stator 4, round hole 12 has been seted up on the surface of main control circuit board 7, main shaft 10 passes round hole 12, and this kind of structure has ensured stability and the precision of main shaft 10, has reduced friction and vibration inside the motor simultaneously, help reducing the noise, the fixed input bearing 13 that is provided with in one end of main shaft 10, the fixed output bearing 11 that is provided with of the other end of main shaft 10, main shaft 10 passes sealed lid 3, output bearing 11 with sealed lid 3 carries out rotation connection, and output bearing 11 and sealed lid 3 carry out rotation connection, and this kind of design make the motor smoothly output connecting wire and the motor pass through sealed lid 3, the sealed lid 2 and the sealed lid 2 that the motor has also carried out the sealed lid 2, the input connection wire that has reduced the input connection wire and the motor has been provided with the noise, the sealed lid 2 has been improved the motor, and the user's 2 has been connected to the user's surface, and has improved the quality that the motor has been provided with the sealed lid 2.

The small-size brushless motor of making an uproar falls in this embodiment makes the noise that produces when brushless motor can better absorption operation through setting up inhale cotton layer 9, elastic rubber layer 5, inhale the sound foam layer, and closed casing 1 structure can the transmission of separation sound simultaneously, improves the noise reduction effect greatly.

It will be evident to those skilled in the art that the utility model is not limited to the details of the foregoing illustrative embodiments, and that the present utility model may be embodied in other specific forms without departing from the spirit or essential characteristics thereof. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the utility model being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein.

Claims (6)

1. A small brushless motor with noise reduction, comprising a shell and a sealing cover, wherein a stator and a rotor are arranged inside the shell, and wherein the shell is sealed and connected to the sealing cover, an elastic rubber layer is bonded to the outer surface of the stator, a sound-absorbing cotton layer is bonded to the inner surface of the rotor, a main control circuit board is arranged inside the shell, and a sound-absorbing foam layer is bonded to the surface of the main control circuit board. 2. A small brushless motor with noise reduction according to claim 1, characterized in that the elastic rubber layer is bonded to the shell. 3. A small brushless motor with noise reduction according to claim 1, characterized in that: a plurality of snap-fit blocks are fixedly provided on the side of the shell, a plurality of positioning grooves are provided on the surface of the main control circuit board, and the plurality of snap-fit blocks are snap-fitted and connected with the plurality of positioning grooves. 4. A small brushless motor with noise reduction according to claim 1, characterized in that: a main shaft is arranged in the middle of the stator and passes through the stator, and a circular hole is opened on the surface of the main control circuit board, and the main shaft passes through the circular hole. 5. A small brushless motor with noise reduction according to claim 4, characterized in that an input bearing is fixedly provided at one end of the main shaft, an output bearing is fixedly provided at the other end of the main shaft, the main shaft passes through the sealing cover, and the output bearing is rotatably connected to the sealing cover. 6. A small brushless motor with noise reduction according to any one of claims 1 to 5, characterized in that: a connecting wire is provided on the surface of the main control circuit board, and the connecting wire passes through the sealing cover and extends to the outside of the sealing cover.