CN-224229171-U - Structure for improving vibration noise of brushless motor

Abstract

The utility model relates to the technical field of brushless motors, in particular to a structure for improving vibration noise of a brushless motor, which is characterized in that an elastic structure is added between a rotor and a housing bearing seat, the elastic structure absorbs energy generated by rotor vibration and converts the energy into elastic potential energy, meanwhile, damping between the rotor and the housing bearing seat is added, the vibration absorbing and buffering functions are achieved, the transmission of shafting vibration is directly isolated, the structure comprises a driving mechanism, a noise reduction mechanism and an air guide mechanism, the noise reduction mechanism is arranged on the driving mechanism and is used for avoiding vibration noise generated when the rotor moves, and the air guide mechanism is arranged on the noise reduction mechanism and is used for rotating and sucking air.

Inventors

• YU ZHONGYOU
• LIU QILONG
• Zhang shengda
• LIU QIAN
• PAN XIAOYONG

Assignees

• 宁波拓普集团股份有限公司

Dates

Publication Date

20260512

Application Date

20250516

Claims (5)

1. 1. A structure for improving vibration noise of a brushless motor comprises a driving mechanism (01) and is characterized by further comprising a noise reduction mechanism (02) and a wind guiding mechanism (03), wherein the noise reduction mechanism (02) is arranged on the driving mechanism (01) and is used for avoiding vibration noise generated when a rotor moves, and the wind guiding mechanism (03) is arranged on the noise reduction mechanism (02) and is used for rotating and sucking air.
2. 2. A structure for improving vibration noise of a brushless motor according to claim 1, wherein the driving mechanism (01) comprises an upper cover (11) and a stator assembly (12), the upper cover (11) being mounted on the working surface, the stator assembly (12) being mounted on the upper cover (11).
3. 3. A structure for improving vibration noise of a brushless motor as claimed in claim 2, wherein the noise reduction mechanism (02) comprises a rotor assembly (21), a first axial rubber pad (22), a second axial rubber pad (23), sixteen sets of springs (24) and sixteen sets of spring housings (25), the rotor assembly (21) is rotatably mounted on the stator assembly (12), two sets of bearings are mounted on the rotor assembly (21), and bearing grooves are formed in the bearings, the first axial rubber pad (22) is mounted in the bearing grooves, the second axial rubber pad (23) is mounted in the bearing grooves, eight sets of fixing holes are formed in the bearings, sixteen sets of springs (24) are respectively mounted in the fixing holes of the two sets of bearings, and sixteen sets of spring housings (25) are respectively mounted on the sixteen sets of springs (24).
4. 4. A structure for improving vibration noise of a brushless motor according to claim 3, further comprising a first axial rubber pad (22) and a second axial rubber pad (23) made of NR material.
5. 5. A structure for improving vibration noise of a brushless motor as claimed in claim 3, wherein the air guide mechanism (03) comprises an impeller (31), a lower cover (32), an air guide casing (33) and a fan cover (34), the impeller (31) is mounted on the rotor assembly (21), the lower cover (32) is mounted on the rotor assembly (21), the air guide casing (33) is mounted on the upper cover (11), and the fan cover (34) is mounted on the air guide casing (33).

Description

Structure for improving vibration noise of brushless motor Technical Field The present utility model relates to the field of brushless motors, and more particularly, to a structure for improving vibration noise of a brushless motor. Background The main aspect of the large vibration noise of the brushless motor is mechanical noise, the vibration noise has obvious order performance for the rotary machine, and the low-order vibration noise has large energy and is the main focus direction. The prior structure for improving the vibration noise of the brushless motor, for example, a small-sized noise-reducing brushless motor disclosed in the patent application number 202421105488.X, mainly 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. However, shafting vibration is mainly caused by dynamic unbalance, dimensional deviation, coaxiality deviation and the like of the rotor, the rotor vibrates, and the rotor collides with the shell or the bearing seat and is transmitted through the bearing seat or the shell, so that air vibrates to generate noise. Disclosure of utility model In order to solve the technical problems, the utility model provides the structure for improving the vibration noise of the brushless motor, which is characterized in that the elastic structure is added between the rotor and the housing bearing seat, the elastic structure absorbs the energy generated by the vibration of the rotor and converts the energy into elastic potential energy, and meanwhile, the damping between the rotor and the housing bearing seat is added, so that the vibration absorption and buffering effects are realized, and the transmission of the shafting vibration is directly isolated. The structure for improving the vibration noise of the brushless motor comprises a driving mechanism, a noise reduction mechanism and an air guide mechanism, wherein the noise reduction mechanism is arranged on the driving mechanism and is used for avoiding the vibration noise generated when a rotor moves, the air guide mechanism is arranged on the noise reduction mechanism and is used for rotationally sucking air, and the elastic structures arranged in the axial direction and the radial direction of the rotor are used for completely isolating the vibration transmission of the rotor and a housing bearing seat, so that the purpose of reducing the vibration noise of the brushless motor is achieved. Preferably, the driving mechanism comprises an upper cover and a stator assembly, wherein the upper cover is arranged on the working surface, the stator assembly is arranged on the upper cover, and the stator assembly is powered on to generate a magnetic field to drive the rotor to rotate. Preferably, the noise reduction mechanism comprises a rotor assembly, a first axial rubber pad, a second axial rubber pad, sixteen groups of springs and sixteen groups of spring shells, wherein the rotor assembly is rotatably arranged on the stator assembly, two groups of bearings are arranged on the rotor assembly, bearing grooves are formed in the bearings, the first axial rubber pad is arranged in the bearing grooves, the second axial rubber pad is arranged in the bearing grooves, eight groups of fixing holes are formed in the bearings, sixteen groups of springs are respectively arranged in the fixing holes of the two groups of bearings, sixteen groups of spring shells are respectively arranged on the sixteen groups of springs, the magnetic field drives the rotor assembly to rotate, the axial vibration of the rotor assembly is isolated through the first axial rubber pad and the second axial rubber pad, and the radial vibration of the rotor assembly is isolated through the sixteen groups of springs and the spring shells, so that vibration energy is absorbed and dissipated, and the purpose of reducing vibration noise is achieved. Preferably, the rubber pad further comprises a first axial rubber pad and a second axial rubber pad which are made of NR materials. Preferably, the wind guiding mechanism comprises an impeller, a lower cover, a wind guiding shell and a fan cover, wherein the impeller is arranged on the rotor assembly, the lower cover is arranged on the rotor assembly, the wind guiding shell is arranged on the upper cover, the fan cover is arranged on the wind guiding shell, the rotor assembly drives the impeller to rotate, the impeller rotates to accelerate air flow, and the heat dissipation effect of the motor is enhanced. Compared with the prior art, the utility model has the beneficial effects that the vibration transmission of the rotor and the housing bearing s