CN210156981U

CN210156981U - High-torque low-noise direct current motor

Info

Publication number: CN210156981U
Application number: CN201920889977.1U
Authority: CN
Inventors: 吴东杰; 李德海; 李臻; 罗永鸿; 易恭才
Original assignee: Dongguan Lihui Motor Co Ltd
Current assignee: Dongguan Lihui Motor Co Ltd
Priority date: 2019-06-13
Filing date: 2019-06-13
Publication date: 2020-03-17
Anticipated expiration: 2029-06-13

Abstract

The utility model discloses a low noise DC motor of high moment of torsion, this low noise DC motor of high moment of torsion include casing, slide bearing of cylinder, adopt the rotor chip subassembly of helical structure and adopt the magnet steel of inhomogeneous air gap structure, rotor chip subassembly structure as an organic whole, slide bearing rotor chip subassembly reaches the magnet steel is all located in the casing, the magnet steel hug closely in the casing inner wall sets up, the rotor chip subassembly is followed the casing direction set up in the magnet steel, slide bearing sleeve locates rotor chip subassembly one end. The rotor chip component of the utility model is of an inclined spiral structure, which can reduce harmonic waves and optimize electromagnetic noise; moreover, the rotor chip assembly is of an integrated structure and is of a stable structure as a whole, so that mechanical vibration and mechanical noise can be reduced.

Description

High-torque low-noise direct current motor

Technical Field

The utility model relates to a technical field of motor, in particular to high moment of torsion low noise direct current motor.

Background

A dc motor is a motor that converts dc electric energy into mechanical energy, and is widely used for driving mechanical equipment. The motor mainly functions in generating driving torque as a power source of electrical appliances or various machines, and in the traditional motor structure, the air gap between a rotor and magnetic steel is small, and the increase of magnetic performance can cause resonance and electromagnetic noise.

Therefore, a high-torque low-noise direct current motor is provided.

SUMMERY OF THE UTILITY MODEL

A primary object of the present invention is to provide a high torque low noise dc motor having the advantages of eliminating electromagnetic noise and mechanical noise.

In order to achieve the above object, the utility model provides a high moment of torsion low noise DC motor, including casing, slide bearing of cylinder, adopt helical structure's rotor chip subassembly and adopt the magnet steel of inhomogeneous air gap structure, rotor chip subassembly structure as an organic whole, slide bearing rotor chip subassembly reaches the magnet steel is all located in the casing, a plurality of the magnet steel hugs closely in the setting of casing inner wall, rotor chip subassembly is followed the casing direction set up in the magnet steel, slide bearing sleeve locates rotor chip subassembly one end.

Preferably, the rotor chip assembly includes a rotor and a shaft core, the shaft core is arranged along the length direction of the casing, and the rotor is sleeved on the shaft core; the rotor is in an inclined spiral shape, the outer side of the rotor is tightly attached to the inner surface of the magnetic steel, a plurality of grooves are uniformly distributed on the rotor in the circumferential direction, and an inclined angle is formed between each groove and the length direction of the shaft core.

Preferably, the inclination angle is 6 degrees.

Preferably, the magnetic steel is an eccentric magnetic steel structure, and the inner diameter of the magnetic steel and the center of the outer diameter of the magnetic steel deviate by a set distance.

Preferably, the set distance is 1 mm.

Preferably, the magnetic steel is a strong magnetic steel structure of sintered neodymium iron boron.

Compared with the prior art, the utility model discloses following beneficial effect has: the rotor chip component of the utility model is of an inclined spiral structure, which can reduce harmonic waves and optimize electromagnetic noise; moreover, the rotor chip assembly is of an integrated structure and is of a stable structure as a whole, so that mechanical vibration and mechanical noise can be reduced.

Drawings

Fig. 1a is a first perspective view of a high-torque low-noise dc motor according to an embodiment of the present invention.

Fig. 1b is a perspective view of a high torque low noise dc motor (without a casing) according to an embodiment of the present invention.

Fig. 2 is an exploded view of the high torque low noise dc motor according to the embodiment of the present invention.

Fig. 3 is a cross-sectional view of the magnetic steel of the embodiment of the present invention.

Detailed Description

In order to make the technical means, creation features, achievement purposes and functions of the present invention easy to understand, the present invention is further described below with reference to the following embodiments.

The utility model provides a high moment of torsion low noise direct current motor 100 improves through the structure to magnet steel 40, rotor chip subassembly 30 and casing 10 among the direct current motor to realize the optimization of electromagnetic noise and mechanical noise in the motor. The structure of the high-torque low-noise dc motor 100 will be described in detail with reference to fig. 1a, 1b, 2 and 3:

as shown in fig. 1a, 1b and 2, the high-torque low-noise dc motor 100 of the present embodiment includes a cylindrical casing 10, a sliding bearing 20, a rotor chip assembly 30 having a helical structure, and a magnetic steel 40 having a non-uniform air gap structure. Through the arrangement of the rotor chip assembly 30 with the inclined spiral structure and the magnetic steel 40 with the uneven air gap structure, harmonic waves are reduced, electromagnetic noise is optimized, and the stability of the motor is improved; furthermore, the rotor chip assembly 30 is an integrated structure, and mechanical vibration and mechanical noise are reduced by the rotor chip assembly 30 having a stable structure.

Specifically, the structure of each component is described in detail:

referring to fig. 1a, fig. 1b and fig. 2, the sliding bearing 20, the rotor chip assembly 30 and the magnetic steel 40 of the present embodiment are all disposed in the casing 10. Wherein, the casing 10 is a thickened structure, which can reduce the electromagnetic sound caused by magnetic leakage and prevent the performance change of the motor caused by demagnetization.

Referring to fig. 1a, fig. 1b and fig. 2, in the present embodiment, a plurality of magnetic steels 40 are disposed to be closely attached to the inner wall of the casing 10, and the uneven air gap of the magnetic steels 40 is realized by the structure of the eccentric magnetic steel 40, that is, the inner diameter of the magnetic steel 40 and the outer diameter of the magnetic steel 40 are not concentric circles. As shown in fig. 3, the inner diameter of the magnetic steel 40 is offset from the center of the outer diameter of the magnetic steel 40 by a set distance, which is 1mm, but not limited thereto. Through the eccentric magnetic steel 40 structure, the no-load air gap flux density is optimized, the harmonic wave is reduced, and the stability of the motor is improved. Preferably, in this embodiment, the magnetic steel 40 is 4 pieces, the 4 pieces of magnetic steel 40 completely adhere to the inner wall of the casing 10 and form a ring, and the magnetic steel 40 is a sintered nd-fe-b ferromagnetic magnetic steel 40 structure, which enhances magnetic performance and increases motor torque.

Referring to fig. 1a, fig. 1b and fig. 2, the rotor chip assembly 30 of the present embodiment is disposed in the magnetic steel 40 along the direction of the casing 10. Specifically, the rotor chip assembly 30 of the present embodiment includes a rotor 31 and a shaft core 32, the shaft core 32 is disposed along the length direction of the casing 10, and the rotor 31 is sleeved on the shaft core 32; the rotor 31 is in a helical shape, the outer side of the rotor 31 is tightly attached to the inner surface of the magnetic steel 40, a plurality of grooves 311 are uniformly distributed on the rotor 31 along the circumferential direction, and an inclined angle is formed between the grooves 311 and the length direction of the shaft core 32. Preferably, the angle of inclination is 6 degrees, but not limited thereto. Through the arrangement of the rotor chip assembly 30 with the inclined spiral structure, harmonic waves can be reduced, and electromagnetic noise is optimized.

Compared with the prior art, the utility model discloses following beneficial effect has: the rotor chip assembly 30 of the present invention has a helical structure, which can reduce harmonic waves and optimize electromagnetic noise; furthermore, the rotor chip assembly 30 is an integrated structure, and the whole structure is stable, so that mechanical vibration and mechanical noise can be reduced.

The basic principles and the main features of the invention and the advantages of the invention have been shown and described above. It will be understood by those skilled in the art that the present invention is not limited to the above embodiments, and that the foregoing embodiments and descriptions are provided only to illustrate the principles of the present invention without departing from the spirit and scope of the present invention. The scope of the invention is defined by the appended claims and equivalents thereof.

Claims

1. The utility model provides a high moment of torsion low noise direct current motor, its characterized in that, including casing, slide bearing of cylinder, adopt oblique helical structure's rotor chip subassembly and adopt the magnet steel of inhomogeneous air gap structure, rotor chip subassembly structure as an organic whole, slide bearing the rotor chip subassembly reaches the magnet steel is all located in the casing, a plurality of the magnet steel hug closely in the casing inner wall sets up, the rotor chip subassembly is followed the casing direction set up in the magnet steel, slide bearing sleeve locates rotor chip subassembly one end.

2. The high-torque low-noise direct-current motor according to claim 1, wherein the rotor chip assembly includes a rotor and a shaft core, the shaft core is disposed along a length direction of the casing, and the rotor is sleeved on the shaft core; the rotor is in an inclined spiral shape, the outer side of the rotor is tightly attached to the inner surface of the magnetic steel, a plurality of grooves are uniformly distributed on the rotor in the circumferential direction, and an inclined angle is formed between each groove and the length direction of the shaft core.

3. The high torque low noise dc motor of claim 2, wherein the tilt angle is 6 degrees.

4. The high torque low noise dc motor of claim 1, wherein said magnetic steel is an eccentric magnetic steel structure, and the inner diameter of said magnetic steel is offset from the center of the outer diameter of said magnetic steel by a predetermined distance.

5. The high torque low noise dc motor according to claim 4, wherein the set distance is 1 mm.

6. The high torque low noise dc motor of claim 1, wherein said magnetic steel is a sintered ndfeb ferromagnetic steel structure.