CN203504321U

CN203504321U - Split-type permanent magnet rotor

Info

Publication number: CN203504321U
Application number: CN201320533350.5U
Authority: CN
Inventors: 史少辉
Original assignee: Hefei Kaibang Motor Co Ltd
Current assignee: Hefei Kaibang Motor Co Ltd
Priority date: 2013-08-29
Filing date: 2013-08-29
Publication date: 2014-03-26
Anticipated expiration: 2023-08-29

Abstract

The utility model relates to the field of motor permanent magnet rotors, and specifically relates to a split-type permanent magnet rotor comprising a rotor shaft and a rotor core. The rotor core is fixed to the rotor shaft, the outer surface of the rotor core is sleeved with a vibration damping sleeve, the vibration damping sleeve is fixedly sleeved with a circular magnet ring, and the vibration damping sleeve is arranged between the magnet ring and the rotor core, so that resonance generated by a motor and external loads is prevented, and noise is reduced. By employing the rotor having the structure mentioned above, shortages of magnet ring deformation and damage to the magnet performance due to the magnet ring being heated are effectively prevented, manufacturing shortages that the assembling efficiency is low by a conventional manner that magnetic tiles are pasted on the surface of a rotor core, and the sintered magnetic tiles are fragile are overcome, the rotor is convenient and rapid to manufacture, the number of parts is reduced, assembling time for the integral motor is saved, and the rotor is applicable to mass production.

Description

Separated permanent magnetic rotor

Technical field

The utility model relates to electromotor permanent magnet rotor field, particularly Separated permanent magnetic rotor.

Background technology

Brushless DC motor rotor is mainly partly comprised of armature spindle, rotor core, permanent magnet etc., and the p-m rotor of traditional brshless DC motor is that armature spindle is pressed fit into rotor core axis hole, then at rotor core outer surface magnetic tile pasting; Or armature spindle is positioned in mould, through high-temperature injection, will mould the once injection mo(u)lding on armature spindle of magnetic material, form permanent magnet.The p-m rotor of making is like this integral body, is rigid structure completely, easily produces resonance between motor and external load, for example, when idle call brushless DC motor drives fan blade rotation, easily produces resonance, and noise is large, has a strong impact on the quality of motor.

Summary of the invention

The purpose of this utility model is to provide a kind of motor and external load avoided and produces resonance, the Separated permanent magnetic rotor that noise is little.

For achieving the above object, the utility model has adopted following technical scheme: a kind of Separated permanent magnetic rotor, comprise armature spindle and rotor core, and described rotor core is fixed on armature spindle, on the outer surface of rotor core, be arranged with shock-reducing sleeve, circular magnet ring fixed cover is located on shock-reducing sleeve.

Owing to adopting above technical scheme, between magnet ring and rotor core, shock-reducing sleeve is set, can avoid motor and external load to produce resonance, reduced noise, and the rotor of this structure can effectively be avoided magnet ring temperature distortion and destroy the defects such as magnet magnetic property, overcome conventional rotors iron core surface magnetic tile pasting efficiency of assembling low simultaneously, the manufacturing defect such as sintering magnetic shoe easily breaks up, this structure fabrication is convenient and swift, reduced amount of parts, saved the motor final assembly time, be applicable to producing in enormous quantities.

Accompanying drawing explanation

Fig. 1 is structural representation of the present utility model;

Fig. 2 is the A-A cutaway view of Fig. 1;

Fig. 3 is the structural representation of another execution mode of the present utility model.

Fig. 4 is the B-B cutaway view as 3.

The structural representation of Fig. 5 magnet ring;

Fig. 6 is the C-C cutaway view of Fig. 5;

Fig. 7 is the installation diagram of shock-reducing sleeve and iron core;

Fig. 8 is the D-D cutaway view of Fig. 7.

Embodiment

As Fig. 1-4, a kind of Separated permanent magnetic rotor, comprises armature spindle 10 and rotor core 20, and described rotor core 20 is fixed on armature spindle 10, is arranged with shock-reducing sleeve 30 on the outer surface of rotor core 20, and circular magnet ring 40 is sheathed to be fixed on shock-reducing sleeve 30.

The utility model be permanent magnet is processed into circular, direct sheathed being fixed on shock-reducing sleeve 30 then, with magnet ring 40, as permanent magnet, this structure production and processing is also very convenient, has greatly improved production efficiency.Between magnet ring 40 and rotor core 30, shock-reducing sleeve 30 is set, the rotor of this split-type structural can avoid motor and external load to produce resonance, and there is flexible shock-reducing sleeve 30 and can also absorb noise, significantly reduced the noise that rotor produces, improve the quality of rotor.The magnet ring 40 of this construction rotor is without high-temperature injection, can effectively avoid magnet ring 40 temperature distortions and destroy the defects such as magnet magnetic property, overcome traditional rotor core surface magnetic tile pasting efficiency of assembling low simultaneously, the manufacturing defect such as sintering magnetic shoe easily breaks up, this structure fabrication is convenient and swift, reduced amount of parts, saved the motor final assembly time, be applicable to producing in enormous quantities.

Described shock-reducing sleeve 30 is silicone rubber pad, and described shock-reducing sleeve 30 is injection-moulded on the outer surface of rotor core 20.Armature spindle 10, then places it in mould through riveting after the mesopore of rotor core 20 together, at the surperficial injection moulding silicon rubber of rotor core 20, assembles magnet ring 40 after silicon rubber is cooling.

As shown in Figure 1, described shock-reducing sleeve 30 is injected with steel ring 31, and magnet ring 40 is set on steel ring 31 and both form interference fit.Steel ring 31 is injected into the surface of shock-reducing sleeve 30, be that injection moulding is fixed on silicone rubber sleeve, then magnet ring 40 is pressed on steel ring 31, due to the softer easy generation distortion of silicon rubber, easily causes the axis of magnet ring 40 and armature spindle 10 not overlap, arranging of steel ring 31 can make up this shortcoming, steel ring 31 can keep good circularity, for magnet ring 40 provides accurate location, guarantees the dead in line of magnet ring 40 and armature spindle 10, improve rotor quality, the better adaptability of this structure.

As shown in Fig. 5-8, in the circumferential direction of the perisporium of described shock-reducing sleeve 30, be interval with plural groove 32, the flute length direction of this groove 32 is arranged along the axis direction of shock-reducing sleeve 30, the inner surface of described magnet ring 40 is provided with plural raised line 41, this raised line 41 arranges along the axis direction of magnet ring 40, and described raised line 41 is connected in corresponding groove 32 and both form circumferential spacing cooperation.

As illustrated in Figures 5 and 6, it is poroid that the endoporus of described magnet ring 40 is axially step, described shock-reducing sleeve 30 is step-like and shock-reducing sleeve 30 is identical with magnet ring 40 sizes, and the large footpath section of described shock-reducing sleeve 30 is placed in the macropore of magnet ring 40, and its path section is placed in the aperture of magnet ring 40.Magnet ring 40 can only penetrate from the segment of shock-reducing sleeve 30, the step surface of shock-reducing sleeve 30 positions magnet ring 40, this structure plays the effect of axial limiting simultaneously, effectively prevent that magnet ring 40 from occurring axially to collect together, the degree of freedom of the axial and circumferential of magnet ring 40 is all defined, stop magnet ring 40 occurrence positions skews, guaranteed rotor steadiness.Improve rotor quality.

As shown in Figure 5, the two ends of described magnet ring 40 are equipped with annular shallow slot 42, and shock-reducing sleeve 30 is between two annular shallow slots 42, and the circular catch 43 of thin slice is sticked in described annular shallow slot 42.With glue, catch 43 is sticked in annular shallow slot 42, described catch 43 has blocked two end faces of shock-reducing sleeve 30, also the catch 43 that can say two ends is enclosed in shock-reducing sleeve 30 in magnet ring 40, prevent that greasy dirt, thermal shock, temperature etc. are by the performance of such environmental effects shock-reducing sleeve 30, Extending Rotor useful life, improve rotor quality.

Claims

1. a Separated permanent magnetic rotor, comprise armature spindle (10) and rotor core (20), described rotor core (20) is fixed on armature spindle (10), it is characterized in that: on the outer surface of rotor core (20), be arranged with shock-reducing sleeve (30), circular magnet ring (40) fixed cover is located on shock-reducing sleeve (30).

2. Separated permanent magnetic rotor according to claim 1, is characterized in that: described shock-reducing sleeve (30) is silicone rubber pad, and described shock-reducing sleeve (30) is injection-moulded on the outer surface of rotor core (20).

3. Separated permanent magnetic rotor according to claim 2, is characterized in that: described shock-reducing sleeve (30) is injected with steel ring (31), and magnet ring (40) is set in steel ring (31) above and both form interference fit.

4. Separated permanent magnetic rotor according to claim 2, it is characterized in that: in the circumferential direction of the perisporium of described shock-reducing sleeve (30), be interval with plural groove (32), the flute length direction of this groove (32) is arranged along the axis direction of shock-reducing sleeve (30), the inner surface of described magnet ring (40) is provided with plural raised line (41), this raised line (41) arranges along the axis direction of magnet ring (40), and described raised line (41) is connected in corresponding groove (32) and both form circumferential spacing cooperation.

5. according to the Separated permanent magnetic rotor described in claim 3 or 4, it is characterized in that: the endoporus of described magnet ring (40) is stepped hole, described shock-reducing sleeve (30) is axially step-like and shock-reducing sleeve (30) is identical with magnet ring (40) size, the large footpath section of described shock-reducing sleeve (30) is placed in the macropore of magnet ring (40), and its path section is placed in the aperture of magnet ring (40).

6. according to the Separated permanent magnetic rotor described in claim 3 or 4, it is characterized in that: the two ends of described magnet ring (40) are equipped with annular shallow slot (42), shock-reducing sleeve (30) is positioned between two annular shallow slots (42), and the circular catch of thin slice (43) is sticked in described annular shallow slot (42).