External rotor electric machine
Technical field
The present invention relates to a kind of external rotor electric machine.
Background technology
Outer rotor blower fan has been widely used in fields such as room ventilation exhaust equipments such as hotel, large parking lot, building, office, mansion, air-conditioning unit, air cleaning system, smoke exhaust ventilator, apparatus cools.Outer rotor blower fan is structure and the pneumatic design that has adopted the rotation of the direct impeller of external rotor electric machine direct connection transmission, characteristics such as have that efficient height, noise are low, in light weight, compact conformation, installation and maintenance are convenient.
As shown in Figure 1, conventional at present external rotor electric machine is equipped with two bearings, one is installed in the bearing chamber of end cap bottom surface, another places in the bearing pedestal of the stator core other end, this bearing pedestal and iron core are not an integral body, but an independent part, bearing pedestal is fitted in the stator core end after the processing separately.Two bearings place respectively in two parts of processing separately, and the specification of bearing is also inequality, therefore, are difficult to the concentricity of back two bearings of control assembling.Can vibration in the bearing rotation process of different axles thereby drive external rotor and beat, beat is serious and noise arranged when causing the impeller rotation.
Summary of the invention
The technical problem to be solved in the present invention is: overcome the deficiencies in the prior art, a kind of external rotor electric machine is provided, two bearings of its inside are positioned at same part, and bearing is difficult for vibration in rotation process, and external rotor is difficult for beating.
The technical solution adopted for the present invention to solve the technical problems is: a kind of external rotor electric machine, have external rotor, rotating shaft, stator core, clutch shaft bearing, second bearing and end cap, the endoporus of described stator core is pressed with first sleeve pipe, the clutch shaft bearing and second bearing are the bearing of same size, and the clutch shaft bearing and second bearing are installed in first sleeve pipe.
Described first sleeve covers is lived the stator core endoporus and is axially exceeded the stator core endoporus at the end near external rotor.
The end end that described clutch shaft bearing is installed in close external rotor in first sleeve pipe also with between the external rotor is connected by stage clip.
Described second Bearing Installation near an end of end cap, is used second case off between second bearing and the clutch shaft bearing in first sleeve pipe.The second sleeve pipe fixed intervals clutch shaft bearing and second bearing, clutch shaft bearing are difficult for waving in operation process, not easy glide.
Described end cap is installed in second bearing outside, and described rotating shaft penetrates from external rotor, passes the clutch shaft bearing and second bearing to the end cap inner chamber, with the pad card the 3rd sleeve pipe is arranged between an end end of the close end cap inner chamber of rotating shaft and second bearing.The 3rd sleeve pipe is fixed second bearing, and second bearing is difficult for waving in operation process, not easy glide.
Described first sleeve pipe, second sleeve pipe, the 3rd sleeve pipe all adopt metal tube.
The end of close external rotor one end of described rotating shaft has is convenient to the leader that rotating shaft press-fits, and described leader is positioned at the outside of external rotor.
Further, described leader is the heat treatment seeker.
The invention has the beneficial effects as follows: the clutch shaft bearing of the present invention and second bearing adopt the bearing of same size, and be installed in same part promptly in first sleeve pipe, guaranteed to assemble the concentricity of latter two bearing, motor is in running, two bearings are difficult for vibration, and external rotor is difficult for beating, therefore, the external rotor electric machine noise is lower, is difficult for beating.
After increasing the heat treatment seeker in the rotating shaft, can guide press-fiting of rotating shaft, and when after external rotor electric machine fine finishining, checking, clamping parts when can be used as check, clamping when being convenient to check, and, the heat treatment seeker is because passed through heat treatment, promptly drop so only need putt, handle simple and conveniently, can not influence the profile of finished product external rotor electric machine.
Description of drawings
The invention will be further described below in conjunction with drawings and Examples.
Fig. 1 is the prior art constructions schematic diagram;
Fig. 2 is a structural representation of the present invention;
Wherein: 1. external rotor, 2. rotating shaft, 3. stator core, 4. clutch shaft bearing, 5. second bearing, 6. end cap, 7. first sleeve pipe, 8. second sleeve pipe, 9. the 3rd sleeve pipe, 10. heat treatment seeker
Embodiment
External rotor electric machine as shown in Figure 2, have external rotor 1, rotating shaft 2, stator core 3, clutch shaft bearing 4, second bearing 5 and end cap 6, the endoporus of stator core 3 is pressed with first sleeve pipe 7, the clutch shaft bearing 4 and second bearing 5 are the bearing of same size, and the clutch shaft bearing 4 and second bearing 5 are installed in first sleeve pipe 7.
First sleeve pipe 7 covers stator core 3 endoporus and axially exceeds stator core 3 endoporus at the end near external rotor 2.
Clutch shaft bearing 4 be installed in first sleeve pipe 7 near an end end of external rotors 2 and with external rotor 2 between be connected by stage clip.
Second bearing 5 is installed in an end of close end cap 6 in first sleeve pipe 7, separates with second sleeve pipe 8 between second bearing 5 and the clutch shaft bearing 4.
End cap 6 is installed in second bearing, 5 outsides, and rotating shaft 2 penetrates from external rotor 1, passes the clutch shaft bearing 4 and second bearing 5 to end cap 6 inner chambers, with the pad card the 3rd sleeve pipe 9 is arranged between an end end of rotating shaft 2 close end cap 6 inner chambers and second bearing 5.
First sleeve pipe 7, second sleeve pipe 8, the 3rd sleeve pipe 9 all adopt metal tube.
The end of rotating shaft 2 close external rotor 1 one ends has is convenient to the heat treatment seeker 10 that rotating shaft press-fits.
The clutch shaft bearing 4 and second bearing 5 adopt the bearing of same size, and are installed in first sleeve pipe 7 concentricity that has guaranteed to assemble latter two bearing, in running, two bearings are difficult for vibration, and external rotor is difficult for beating, therefore, the external rotor electric machine noise is lower, is difficult for beating.
After increasing heat treatment seeker 10 in the rotating shaft 2, can guide press-fiting of rotating shaft 2 on the one hand, on the other hand, when after external rotor electric machine fine finishining, checking, the clamping parts when can be used as check, clamping when being convenient to check, heat treatment seeker 10 is because passed through heat treatment, promptly drop so only need putt, handle simple and conveniently, can not influence the profile of finished product external rotor electric machine.