CN207490657U - A kind of outer rotor motor structure - Google Patents

Abstract

Utility model discloses a kind of outer rotor motor structure, including rotor assembly, stator module and output shaft, rotor assembly is set in outside stator module, output shaft passes through rotor assembly and stator module, output shaft includes the interior section being arranged in rotor assembly and the exterior section being arranged on outside rotor assembly, interior section is provided with internal bearings group, external bearings group is additionally provided in exterior section.The setting of this programme, improves the cantilever design of motor shaft, further slows down the vibration in rotor operation process, reduces the noise in motor operation, improves the stationarity of motor operation, so as to extend the service life of motor.This programme is simple in structure, convenient for assembling, has the preferable market competitiveness.

Description

A kind of outer rotor motor structure

Technical field

The utility model is related to a kind of electric machine structure more particularly to a kind of outer rotor motor structures.

Background technology

Motor is one of various electronic product essential elements, wherein outer rotor induction machine have it is compact-sized, material is sharp With rate it is high the advantages of, be widely used in exhaust equipment, air-conditioner set, air cleaning system and cooling equipment etc. fields.At present, outside Rotor blower fan is widely used to the room ventilations such as hotel, large parking lot, building, office, mansion exhaust equipment, sky Adjust the fields such as unit, air cleaning system, smoke exhaust ventilator, equipment cooling.Outer rotor blower fan is that employ external rotor electric machine direct The structure and pneumatic design method of impeller rotation, have efficiently, it is low noise, light-weight, compact-sized, convenient to install and maintain The features such as.

As shown in Figure 1, the output shaft of external rotor electric machine and the mounting structure design of bearing are designed so as to currently on the market 's：The rear and front end of output shaft respectively one bearing of installation, and two bearing specification differences.Two bearings of every motor, for Height is folded longer and the shortcomings that rear shaft strength is big there are the cantilever beam arm of force for thick external rotor electric machine, be easy to cause motor and sweeps boring And fore bearing failure.

The patent of invention CN201310167439.9 of China discloses a kind of outer rotor motor structure, including rotor, stator And output shaft, the output shaft include the interior section being arranged on inside motor and the exterior section for being arranged on outside motor, Spacing is provided with clutch shaft bearing and second bearing on the interior section of motor output shaft, on the interior section of motor output shaft 3rd bearing is additionally provided with, the setting of the 3rd bearing slows down the vibration in rotor operation process, reduces motor operation In noise.But in the technical solution of external rotor electric machine as described above, the exterior section of motor output shaft is still cantilever Beam form easily generates vibration and noise in the operation process of motor, so as to reduce the service life of motor.

Utility model content

In view of the above-mentioned deficiencies in the prior art, the purpose of this utility model is to provide a kind of external rotor electric machines Structure is provided with internal bearings group in the interior section of motor output shaft；It is additionally provided in the exterior section of motor output shaft outer Portion's bearing group, the quantity of external bearings group are at least one；The setting of the external bearings group causes motor output shaft without cantilever, and And elastic shaft bearing is additionally provided with, for accommodating external bearings group, in this way, greatly changing the stress of motor, significantly Extend the service life of motor.

A kind of outer rotor motor structure, including rotor assembly, stator module and output shaft, the rotor assembly includes end It covers, the first centre bore is provided on the end cap；The stator module is provided with the second centre bore；The rotor assembly is set in The outside of the stator module so that the axially bored line of the first centre bore is overlapped with the axially bored line of the second centre bore；The output shaft Across first centre bore and the second centre bore, the output shaft includes the interior section being arranged within end cap and is arranged on Exterior section other than end cap；Internal bearings group, the internal bearings group packet are arranged on the interior section of the output shaft Include clutch shaft bearing group and second bearing group；External bearings group is arranged on the exterior section of the output shaft, in the output Axle sleeve is provided between axis and the rotor endcap.

Preferably, setting is there are one boss on the axle sleeve, correspondingly, being provided on the side wall of first centre bore Groove, the boss are fixed with groove cooperation.Limit displacement of the axle sleeve along output shaft axial direction.

Preferably, it is provided with bulge-structure in the stage casing of the inner wall of second centre bore, the bulge-structure is by second Centre bore is separated into 3 accommodating chambers, respectively the first accommodating chamber, the second accommodating chamber and third accommodating chamber.First accommodating chamber, second Accommodating chamber and third accommodating chamber are cylindrical structure, and the cavity diameter of the second accommodating chamber is less than the first accommodating chamber and third accommodates The cavity diameter of chamber.

Preferably, the clutch shaft bearing group is arranged in first accommodating chamber.The quantity of clutch shaft bearing group is at least one It is a.When the quantity of clutch shaft bearing group is 2,2 two bearings are disposed proximate to.

Preferably, one end of the clutch shaft bearing group is bonded with the side end face of the bulge-structure, the clutch shaft bearing group The other end be bonded with the side end face of the axle sleeve.

Preferably, the second bearing group is arranged in the third accommodating chamber.The quantity of second bearing group is at least one It is a.When the quantity of second bearing group is 2,2 two bearings are disposed proximate to.

Preferably, the quantity of the external bearings group is at least one.The setting of the external bearings group causes motor to export Axis as no cantilever structure.

Preferably, the electric machine structure further includes bearing block, and the external bearings group is contained in the bearing block.

Preferably, the material of the bearing block is elastic material, for example, for rubber, the bearing block of the resilient material It being capable of noise reduction, noise reduction.

Preferably, it is provided with elastic washer between the second bearing group and stator module.

Compared with the prior art, the beneficial effects of the present invention are：The exterior section of motor output shaft is provided with bearing Group, improves the cantilever design of motor shaft, further slows down the vibration in rotor operation process, reduces motor operation In noise, improve the stationarity of motor operation, the performance of motor made further to be protected, so as to extend motor Service life.This programme is simple in structure, convenient for assembling, has the preferable market competitiveness.

Description of the drawings

It in order to illustrate the embodiment of the utility model or the technical proposal in the existing technology more clearly, below will be to embodiment Or attached drawing needed to be used in the description of the prior art does simple introduction, it should be apparent that, the accompanying drawings in the following description is this Some embodiments of utility model, for those of ordinary skill in the art, without creative efforts, also Other attached drawings can be obtained according to these attached drawings.

Fig. 1 is the motor general assembly drawing of the prior art

Fig. 2 is the rotor structure figure of the utility model

Fig. 3 is the motor general assembly structure chart of the utility model

Fig. 4 is the wind turbine general assembly structure chart of the utility model

Fig. 5 is the exterior section enlarged drawing of the utility model output shaft

Fig. 6 is the utility model part-structure figure

Specific embodiment

Embodiments of the present invention are described below in detail, the example of the embodiment is shown in the drawings, wherein from beginning Same or similar element is represented to same or similar label eventually or there is the element of same or like function.Below by ginseng The embodiment for examining attached drawing description is exemplary, and is only used for explaining the present invention, and is not considered as limiting the invention.

For the technical solution of the utility model is made to be more clear clearly, below in conjunction with the accompanying drawings to the utility model into advance one Step description, any technical characteristic to technical solutions of the utility model carry out the scheme that equivalencing is obtained with conventional reasoning and fall Enter scope of protection of the utility model.

As shown in Figures 2 and 3, external rotor electric machine includes rotor assembly 1, stator module 2, output shaft 6 and axle sleeve 14, turns Sub-component includes end cap, and the first centre bore is provided on end cap, the second centre bore, rotor assembly are provided on stator module It is set on stator module, so the axially bored line of the first centre bore is overlapped with the axially bored line of the second centre bore.In output shaft 6 with turning Axle sleeve 14 is provided between sub-component end cap, at least one boss 3 is provided on the periphery of axle sleeve, it is convex in the utility model The quantity of platform 3 be 1, may be set to be it is multiple, when boss 3 quantity for it is multiple when, multiple boss are distributed in axle sleeve side by side 14 periphery.As shown in fig. 6, setting fluted 17 on the side wall of the first centre bore, boss 3 is fixed with the cooperation of groove 17, is made Obtaining motor in the process of running, axle sleeve 14 will not be moved along the axial direction of output shaft 6, in the prior art, the length of axle sleeve Degree is all shorter, in order to increase the contact area of output shaft 6 and axle sleeve, in the present solution, increase the length of axle sleeve, makes axle sleeve Length is in more than 40mm, and in the utility model, the length of axle sleeve is 43.6mm, and output shaft 6 and the contact area of axle sleeve 14 increase Add, output shaft 6 and the binding force of axle sleeve 14 increase, and reduce the cantilever of axis, improve motor stress, are conducive to extend the motor longevity Life.

Output shaft 6 includes being arranged on the interior section within end cap and the exterior section being arranged on other than end cap 4, end cap Exterior section 4 in addition is the front end of output shaft 6.As shown in fig. 6, there are one protrusion knots for setting on the side wall of the second centre bore Structure 21, the bulge-structure are arranged on the middle part of the second centre bore so that the second centre bore is separated into 3 receivings by the bulge-structure Chamber, the first accommodating chamber 18, the second accommodating chamber 19 and third accommodating chamber 20, aforementioned 3 accommodating chambers are cylindrical structure, the The cavity diameter of two accommodating chambers 19 is less than the cavity diameter of the first accommodating chamber 18 and third accommodating chamber 20.Clutch shaft bearing group is arranged on In first accommodating chamber 18, one end of the clutch shaft bearing group is bonded with the side end face of the bulge-structure 21, the clutch shaft bearing The other end of group is bonded with the side end face of the axle sleeve, and the quantity of contained bearing is at least 1 in the clutch shaft bearing group, when the When the quantity of one bearing group is 2,2 two bearings are disposed proximate to.In the utility model, clutch shaft bearing group includes 2 axis It holds, bearing 7 and bearing 8, bearing 7 and bearing 8 are disposed proximate to.Second bearing group is contained in third accommodating chamber 20, second bearing The quantity of group is at least 1, and when the quantity of second bearing group is 2,2 bearings are disposed proximate to, in the utility model, the Two bearing groups are comprising there are one bearing, bearings 9.Using 3 bearing arrangements inside motor, add a bearing, improve motor by Power state is conducive to extend the service life of motor.

Front end of the exterior section of output shaft 6 for output shaft, the tail end for output shaft opposite with the front end of output shaft, The tail end of output shaft 6 is provided with annular groove 5, and circlip 10 (also known as clamp spring) is equipped in the groove body of annular groove 5, The axial movement for acting as preventing output shaft 6 of the circlip, one end of the circlip are bonded with one end of bearing 9, Elastic washer 11 is provided between the other end of bearing 9 and bulge-structure 21, the setting of the elastic washer 11 is in order to which damping is dropped It makes an uproar, lubricating grease 13 and dustproof cover 12 is additionally provided in the tail end of output shaft.

As shown in figure 4, the exterior section in motor output shaft 6 is provided with external bearings group, which is included The quantity of bearing be at least 1, in the utility model, the quantity of external bearings group is 1, and external bearings group is included Bearing is bearing 15.In the electric machine structure mentioned in this programme, bearing block 16 is additionally provided with, bearing 15 is contained in bearing block 16 Interior, the material of bearing block 16 is elastic material, for example be rubber etc..The bearing block is provided with subtracting conducive to entire electric machine structure Shake, noise reduction.

Claims (10)

1. a kind of outer rotor motor structure, including rotor assembly, stator module and output shaft, the rotor assembly includes end cap, The first centre bore is provided on the end cap；The stator module is provided with the second centre bore；The rotor assembly is set in institute State the outside of stator module so that the axially bored line of the first centre bore is overlapped with the axially bored line of the second centre bore；The output shaft is worn First centre bore and the second centre bore are crossed, the output shaft includes the interior section being arranged within end cap and is arranged on end Exterior section other than lid；It is characterized in that：Internal bearings group, the inside are arranged on the interior section of the output shaft Bearing group includes clutch shaft bearing group and second bearing group；External bearings group is arranged on the exterior section of the output shaft, Axle sleeve is provided between the output shaft and the rotor endcap.

2. electric machine structure as described in claim 1, it is characterised in that：Boss there are one settings on the axle sleeve, correspondingly, Fluted, the boss and groove cooperation fixation are set on the side wall of first centre bore.

3. electric machine structure as described in claim 1, it is characterised in that：It is provided in the stage casing of the inner wall of second centre bore Second centre bore is separated into 3 accommodating chambers, respectively the first accommodating chamber, the second accommodating chamber by bulge-structure, the bulge-structure With third accommodating chamber.

4. electric machine structure as claimed in claim 3, it is characterised in that：The clutch shaft bearing group is arranged on first accommodating chamber It is interior.

5. electric machine structure as claimed in claim 4, it is characterised in that：One end of the clutch shaft bearing group and the bulge-structure Side end face fitting, the other end of the clutch shaft bearing group is bonded with the side end face of the axle sleeve.

6. electric machine structure as claimed in claim 3, it is characterised in that：The second bearing group is arranged on the third accommodating chamber It is interior.

7. electric machine structure as described in claim 1, it is characterised in that：The quantity of the clutch shaft bearing group is at least one, institute The quantity for stating second bearing group is at least one, and the quantity of the external bearings group is at least one.

8. electric machine structure as described in claim 1, it is characterised in that：The electric machine structure further includes bearing block, the outside Bearing group is contained in the bearing block.

9. electric machine structure as claimed in claim 8, it is characterised in that：The material of the bearing block is elastic material.

10. electric machine structure as described in claim 1, it is characterised in that：It is set between the second bearing group and stator module It is equipped with elastic washer.