CN202918156U

CN202918156U - Squirrel-cage motor

Info

Publication number: CN202918156U
Application number: CN 201220668313
Authority: CN
Inventors: 陈龙
Original assignee: Gree Electric Appliances Inc of Zhuhai; Zhuhai Kaibang Motor Manufacture Co Ltd; Hefei Kaibang Motor Co Ltd
Current assignee: Gree Electric Appliances Inc of Zhuhai; Zhuhai Kaibang Motor Manufacture Co Ltd; Hefei Kaibang Motor Co Ltd
Priority date: 2012-12-07
Filing date: 2012-12-07
Publication date: 2013-05-01
Anticipated expiration: 2022-12-07

Abstract

The utility model relates to the field of a motor rotor, especially relates to a squirrel-cage motor, and the motor comprises a stator core and end caps, a rotor is fixed on a rotation shaft and is placed in a middle hole of the stator core, two ends of the rotor are both provided with end caps, an end of the rotation shaft penetrates the end cap and extend outside the motor, two end of the rotor are both provided with aluminium rings, wherein at least one end aluminium ring is in a step ring shape, a minor diameter segment of the aluminium ring overhangs into a recessed cavity of the end cap, a gap is arranged between the aluminium ring and a nearby end cap body, an area between the rotor and the end cap is reasonably utilized, the structure increases aluminium ring thickness and simultaneously space inside the motor is not increased, volume of the motor is reduced, and work efficiency of the motor is improved.

Description

Squirrel-cage motor

Technical field

The utility model relates to motor rotor field, particularly squirrel-cage motor.

Background technology

Monopole asynchronous motor comprises rotor, stator core and rotating shaft, and on its rotor fixed rotating shaft and be positioned at the mesopore of stator, the two ends of rotor are fixed by end cap, and rotating shaft extends to outside motor after passing end cap.Traditional cage rotor is first by behind the silicon steel plate stacking, be cast in by aluminium liquid again and form sliver and both sides aluminium ring formation in the groove, for the thickness of the performance aluminium ring that guarantees motor need to have certain axial width, can reduce electric efficiency if the thickness of aluminium ring is less, the thickness of a common side aluminium ring is more than 5mm.Because rotor is to be placed on stator core inside, and its two ends adopt end cap to fix, so will increase trochiterian volume in case increase the thickness of aluminium ring, the volume of stator core and end cap all can and then increase then, finally causes the volume of motor to increase.At present, a lot of occasions need the motor of small volume, such as indoor apparatus of air conditioner, guarantee that again rotor aluminium ring has enough thickness and just has very large difficulty yet the volume that should guarantee motor is little, usually can reduce rotor and change thick or reduce the thickness of aluminium ring in order to reduce motor volume, reduce the efficient of motor, caused motor performance poor.

The utility model content

The purpose of this utility model provides a kind of space that rationally utilizes, and volume is little, the squirrel-cage motor that efficient is high.

For achieving the above object, the utility model has adopted following technical scheme: a kind of squirrel-cage motor, comprise stator core and end cap, rotor is fixed in the rotating shaft and places in the mesopore of stator core, two ends of rotor is provided with end cap, after passing end cap, one end of rotating shaft extends to outside motor, the two ends of rotor are provided with the aluminium ring, wherein at least one end aluminium ring is the ladder ring-type, and the path section of aluminium ring overhangs to the cavity of end cap, is provided with the gap between the end cap lid of described aluminium ring and its side.

Owing to adopt above technical scheme, the path section of aluminium ring is positioned at the cavity of end cap, has rationally utilized the zone between rotor and the end cap, and this structure does not increase the space of motor internal when having increased the aluminium ring thickness, reduce the volume of motor, improved the operating efficiency of motor.

Description of drawings

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

Fig. 2 is the cutaway view of rotor.

Embodiment

Such as Fig. 1, a kind of squirrel-cage motor, comprise stator 10 and end cap 30, rotor 20 is fixed in the rotating shaft 40 and places in the mesopore of stator 10, and rotor 20 two ends are provided with end cap 30, extends to outside motor after an end of rotating shaft 40 passes end cap 30, the two ends of rotor 20 are provided with aluminium ring 21, wherein at least one end aluminium ring 21 is the ladder ring-type, and the path section 211 of aluminium ring 21 overhangs to the cavity 31 of end cap 30, is provided with the gap between end cap 30 lids of described aluminium ring 21 and its side.This gap, place avoids rotor to contact with the end cap rigidity, guarantees the flexible rotating of rotor, and described rotating shaft 40 is the output shaft of motor.The end cap 30 that is positioned at rotor 20 two ends provides support with spacing for rotating shaft 40, guarantees the normal rotation of rotating shaft 40, and the end cap of motor 30 is approximate to be the step tubbiness, has a cavity 31, and as shown in Figure 1, its cavity 31 openings are towards motor internal, namely towards rotor 20.Arrange in the utility model aluminium ring 21 is arranged to the ladder ring-type, rationally utilized the cavity 31 of cylinder cap 30, increased the thickness of aluminium ring 21 on the basis that does not change original stator core 10 structures, improved electric efficiency, changing an angle is exactly the volume that has reduced motor.

The axle journal of the rotating shaft 40 of described rotor 20 1 sides is provided with Hall Plate 60 and magnet ring 50, wherein Hall Plate 60 is positioned at the mesopore of stator 10, magnet ring 50 is positioned at the cavity 31 of respective side end cap 30, the aluminium ring 21a of described Hall Plate 60 sides is circular ring structure, and the aluminium ring 21b that is positioned at rotor 20 other ends is the ladder ring-type.The end of the aluminium ring 21a of close Hall Plate 60 1 sides is provided with chamfering.Can find out that such as Fig. 1 aluminium ring 21b is hung to a side of outside motor near rotating shaft 40.Magnet ring 50 is placed in the cavity 31 of end cap 30, rationally utilize the space, further reduce motor volume.

Be provided with bearing 41 between described rotating shaft 40 and the end cap 30, reduce the friction between rotating shaft 40 and the end cap 30, guarantee rotating shaft 40 flexible rotatings, thereby improve the stability of motor.

The diameter of the large footpath section 212 of described aluminium ring 21b is greater than the internal orifice dimension of end cap 30, and the diameter of path section 211 is less than the internal orifice dimension of end cap 30, and described large footpath section 212 is positioned at the mesopore of stator core 10, and path section 211 is positioned at the cavity 31 of respective side end cap 30.The thickness that the thickness of aluminium ring 21b equals large footpath section 212 adds the thickness of path section 211, and the thickness at this place refers to the length dimension of aluminium ring on the aluminium ring axis direction.

For further description, if aluminium ring 21 is circular ring of the prior art now.If under the constant prerequisite of motor volume, in the situation of namely stator core 10 constancies of volume, if the thickness of aluminium ring 21 can only be made the thickness of the large footpath of ladder ring-type aluminium ring 21b section 212 at this moment, this shows that the thickness of aluminium ring 21 obviously reduces, electric efficiency decreases; If increase aluminium ring 21 thickness then stator core 10 must increase volume, end cap 30 needs the outside to pass, thereby causes the volume of motor to increase.And the aluminium ring 21 of ladder ring-type has just overcome these shortcomings, has improved electric efficiency, has reduced motor volume.

Claims

1. squirrel-cage motor, comprise stator (10) and end cap (30), rotor (20) is fixed on rotating shaft (40) upward and places in the mesopore of stator (10), rotor (20) two ends are provided with end cap (30), one end of rotating shaft (40) extends to outside motor after passing end cap (30), it is characterized in that: the two ends of rotor (20) are provided with aluminium ring (21), wherein at least one end aluminium ring (21) is the ladder ring-type, and the path section (211) of the aluminium ring (21) of ladder ring-type overhangs to the cavity (31) of end cap (30), is provided with the gap between end cap (30) lid of described aluminium ring (21) and its side.

2. squirrel-cage motor according to claim 1, it is characterized in that: rotating shaft (40) axle journal of described rotor (20) one sides is provided with Hall Plate (60) and magnet ring (50), wherein Hall Plate (60) is positioned at the mesopore of stator (10), magnet ring (50) is positioned at the cavity (31) of respective side end cap (30), the aluminium ring (21a) of described Hall Plate (60) side is circular ring structure, and the aluminium ring (21b) that is positioned at rotor (20) other end is the ladder ring-type.

3. squirrel-cage motor according to claim 1 and 2 is characterized in that: be provided with bearing (41) between described rotating shaft (40) and the end cap (30).

4. squirrel-cage motor according to claim 2, it is characterized in that: the diameter of the large footpath section (212) of described aluminium ring (21b) is greater than the internal orifice dimension of end cap (30), the diameter of path section (211) is less than the internal orifice dimension of end cap (30), described large footpath section (212) is positioned at the mesopore of stator (10), and path section (211) is positioned at the cavity (31) of respective side end cap (30).