Strong-torsion noise reduction type micro motor

Abstract

The utility model discloses a strong torsion noise reduction type micro motor, which comprises a rear end cover, a machine core rotor and a shell, the rear end cover is connected to the rear side of the shell, the machine core rotor is arranged in an inner cavity of the shell, a motor shaft is crimped in the machine core rotor, one end of the motor shaft extends to the front side of the shell, and the other end of the motor shaft extends to the rear side of the shell. A shell bearing is arranged outside the motor shaft, a commutator is assembled at one end of the motor shaft, a rear cover bearing is arranged at the other end of the motor shaft and located on the outer side of the commutator, the rear cover bearing and the shell bearing are provided with a ball bearing and a bearing inner ring, and the bearing inner ring is in interference fit with the motor shaft. The beneficial effects are that the working efficiency, reliability and service life of the motor in various application scenes are improved, and the requirements of different industries for high performance and high quality of the motor are met.

Description

TECHNICAL FIELD

[0001] The utility model relates to motor technical field, specifically, relate to the improvement of micro motor. BACKGROUND

[0002] Traditional motor mostly adopts the rubber cap as the rear end cover. The rubber cap material is susceptible to temperature change, mechanical stress and environmental factors during long-term use. In high temperature environment, the rubber cap may soften and deform, resulting in the decline of the cooperation precision with other components inside the motor, and affecting the overall stability of the motor. Moreover, the mechanical strength of the rubber cap is relatively limited, and it is easy to be damaged or deformed under the vibration and slight collision generated during the operation of the motor, thereby failing to effectively protect the core components inside the motor.

[0003] In terms of the core rotor, the original structure design does not have fine treatment at the notch. This makes the motor generate large noise during operation due to the unsatisfactory electromagnetic characteristics at the notch, and limits the torque output of the motor. Meanwhile, the bearing structure used in the front bearing position also has defects. The original bearing may be an ordinary sliding bearing or ball bearing, and the cooperation with other components is not accurate enough. When the motor operates for a long time at high speed, the bearing wears out quickly, thereby shortening the service life of the motor. SUMMARY

[0004] (I) Technical problems solved

[0005] In view of the defects of the prior art, the utility model provides a strong torque noise reduction type micro motor, which adopts a rear end cover with specific material and structure, a core rotor with high magnetic permeability silicon steel sheet lamination and special slot hole design, significantly improves the heat dissipation performance of the motor, reduces the noise level, and enhances the overall structural stability of the motor, thereby solving the problems in the background art.

[0006] (II) Technical solutions

[0007] In order to achieve the above-mentioned advantages of adopting a rear end cover with specific material and structure, a core rotor with high magnetic permeability silicon steel sheet lamination and special slot hole design, significantly improving the heat dissipation performance of the motor, reducing the noise level, and enhancing the overall structural stability of the motor, the utility model adopts the following specific technical solutions: it includes a rear end cover, a core rotor and a shell, the rear end cover is connected to the rear side of the shell, the core rotor is arranged in the inner cavity of the shell, the motor shaft is press-fitted in the inside of the core rotor, one end of the motor shaft extends to the front side of the shell, the motor shell bearing is arranged outside the motor shaft, the commutator is assembled at one end of the motor shaft, the rear cover bearing is arranged outside the commutator, the rear cover bearing and the motor shell bearing are provided with ball bearings and bearing inner rings, and the bearing inner rings are interference-fitted with the motor shaft.

[0008] Further, the rear end cover is an iron cover body, and a slot is formed in the rear part of the rear end cover.

[0009] Further, the shell is an aluminum integrally formed structure.

[0010] Further, the rotor of the core is made of high magnetic permeability silicon steel sheets, and a plurality of symmetrical slot holes are formed on the surface of the rotor, and a cylindrical plastic magnetic field is arranged outside the rotor, and the plastic magnetic field and the shell are matched and are both cylindrical.

[0011] Further, the ball bearing is a silent ceramic ball bearing.

[0012] (Three) beneficial effects

[0013] Compared with the prior art, the utility model provides a strong torsion noise reduction type micromotor, has the following beneficial effects:

[0014] By adopting the rear end cover with specific material and structure, the shell with optimized design, the rotor of the core made of high magnetic permeability silicon steel sheets and having special slot hole design, and the silent ceramic ball bearing, the heat dissipation performance, electromagnetic conversion efficiency and noise level of the motor are significantly improved, and the overall structural stability of the motor is enhanced, so that the working efficiency, reliability and service life of the motor in various application scenarios are improved, and the demand of different industries for high performance and high quality of the motor is met. BRIEF DESCRIPTION OF DRAWINGS

[0015] In order to more clearly illustrate the technical scheme in the embodiments of the utility model or the prior art, the drawings needed to be used in the embodiments will be briefly introduced below, and obviously, the drawings in the following description are only some embodiments of the utility model, and those skilled in the art can also obtain other drawings according to these drawings without creating creative labor.

[0016] Figure 1 It is the structure schematic view of the utility model;

[0017] Figure 2 It is the second structure schematic view of the utility model;

[0018] Figure 3 It is the internal structure schematic view of the utility model;

[0019] Figure 4 It is the second internal structure schematic view in the utility model.

[0020] In the drawing: rear end cover 1, rotor of core 2, shell 3, motor shaft 4, motor shell bearing 5, rear cover bearing 6, slot 11, slot hole 21. DETAILED DESCRIPTION

[0021] To further illustrate the various embodiments, the present invention provides accompanying drawings, which are part of the disclosure of the present invention. These drawings are mainly used to illustrate the embodiments and can be used in conjunction with the relevant descriptions in the specification to explain the operating principles of the embodiments. With reference to these contents, those skilled in the art should be able to understand other possible implementation methods and the advantages of the present invention. The components in the figures are not drawn to scale, and similar component symbols are usually used to represent similar components.

[0022] According to an embodiment of the present invention, a high-torque noise-reducing micro motor is provided.

[0023] The present invention will now be further described in conjunction with the accompanying drawings and specific embodiments, such as... Figures 1-4 As shown, a high-torque noise-reducing micro motor according to an embodiment of the present invention includes a rear end cover 1, a core rotor 2, and a housing 3. The rear end cover 1 is connected to the rear side of the housing 3. The core rotor 2 is disposed in the inner cavity of the housing 3. A motor shaft 4 is press-fitted inside the core rotor 2. One end of the motor shaft 4 extends to the front side of the housing 3. A housing bearing 5 is disposed outside the motor shaft 4. A commutator is assembled at one end of the motor shaft 4. A rear cover bearing 6 is disposed at the other end of the motor shaft 4 outside the commutator. The rear cover bearing 6 and the housing bearing 5 are provided with ball bearings and bearing inner rings. The bearing inner rings are interference-fitted with the motor shaft 4, which can effectively prevent dust, impurities, etc. from entering the bearing interior and protect the normal operation of the bearing.

[0024] In one embodiment, the rear end cover 1 is an iron cover with a slot 11 at the rear. Iron material has excellent magnetic shielding properties, effectively reducing interference from external magnetic fields to the internal circuitry and other components. It also possesses mechanical strength, improving ventilation within the motor. When the motor is running, internal air can form natural convection through the slot 11, helping to dissipate heat, reduce the internal temperature of the motor, and improve its heat dissipation efficiency.

[0025] In one embodiment, the housing 3 is a one-piece aluminum structure. Aluminum has excellent thermal conductivity, which can quickly conduct the heat generated inside the motor to the surface of the housing, and then dissipate it into the surrounding environment.

[0026] In one embodiment, the rotor 2 is made of stacked high-permeability silicon steel sheets. The surface of the rotor 2 has an array of symmetrical slots 21. Adjusting the slots reduces noise and increases torque. The plastic magnetic field matches the outer shell 3, both being cylindrical. The plastic magnetic field protects the rotor windings, reduces friction between the rotor and the outer shell 3, and optimizes the magnetic field distribution.

[0027] In one embodiment, the ball bearing is a mute ceramic ball bearing. Prolong the wear life. With the advantages of high hardness, low friction coefficient, high temperature resistance, corrosion resistance.

[0028] Working principle: the rotor 2 of the core is made of high magnetic permeability silicon steel sheet, a plurality of symmetrical slot holes 21 are arranged on the surface of the rotor 2 of the core, the rotor 2 is adjusted to reduce noise and increase torque, the plastic magnetic field is matched with the shell 3, the current in the rotor winding can be more effectively coupled with the stator magnetic field, a stable and larger electromagnetic torque is generated, and the motor shaft 4 is rotated. In the rotating process, the motor shaft 4 is supported through the machine shell bearing 5 and the rear cover bearing 6, the low friction characteristic of the mute ceramic ball bearing reduces energy loss and noise generation. At the same time, the aluminum material of the shell 3 and the slot 11 of the rear end cover 1 jointly act, the rear end cover 1 is an iron cover body, and the slot 11 is arranged at the rear of the rear end cover 1. The interference of the external magnetic field of the motor on the internal circuit and other components can be effectively reduced, when the motor operates, the internal air can form natural convection through the slot 11, which helps to dissipate heat, reduces the internal temperature of the motor, and improves the heat dissipation efficiency of the motor.

[0029] In the utility model, unless another definite provision and limitation, the terms "installation", "arrangement", "connection", "fix", "screw connection" and the like terms should do broad sense understanding, for example, can be fixed connection, also can be detachable connection, or be integrated;Can be mechanical connection, also can be electrical connection;Can be directly connected, also can be indirectly connected through intermediate medium, can be the communication or mutual action relation of two elements inside, unless another definite limitation, for the ordinary skilled in the art, can understand the specific meaning of the above terms in the utility model according to specific circumstances.

[0030] The above only is the preferred embodiment of the utility model, and does not limit the utility model, and any modification, equivalent replacement, improvement etc. that is made within the spirit and principle of the utility model should be included in the protection scope of the utility model.

Claims

1. A high-torque, noise-reducing micro motor, characterized in that: It includes rear end cover (1), core rotor (2) and shell (3), the rear end cover (1) is connected in the rear side of shell (3), the core rotor (2) is arranged in the inner chamber of shell (3), the inside of core rotor (2) is crimped with motor shaft (4), the one end of motor shaft (4) extends to the front side of shell (3), the outside of motor shaft (4) is provided with casing bearing (5), commutator is assembled in the one end of motor shaft (4), the other end of motor shaft (4) is located in the outside of commutator and is provided with rear cover bearing (6), the rear cover bearing (6) is provided with ball bearing and bearing inner ring with casing bearing (5), bearing inner ring is interference fit with motor shaft (4).

2. The strong-torque noise-reduction micro motor according to claim 1, characterized in that: The rear end cover (1) is iron cover body, and the rear end cover (1) is provided with a slot (11) in the rear part.

3. The strong-torque noise-reduction micro motor according to claim 1, wherein: The shell (3) is an aluminum integrated structure.

4. The strong-torque noise-reduction micro motor according to claim 1, wherein: The core rotor (2) is made of high magnetic permeability silicon steel sheet, and a plurality of symmetrical slot holes (21) are formed on the surface of the core rotor (2), a cylindrical plastic magnetic field is sleeved on the outside of the core rotor (2), and the plastic magnetic field is matched with the shell (3) and is also cylindrical.

5. The strong-torque noise-reduction micromotor according to claim 1, wherein: The ball bearing is a silent ceramic ball bearing.

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