CN203967942U - The rotor endcap of external rotor electric machine and the external rotor electric machine with it - Google Patents

The rotor endcap of external rotor electric machine and the external rotor electric machine with it Download PDF

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Publication number
CN203967942U
CN203967942U CN201420324418.3U CN201420324418U CN203967942U CN 203967942 U CN203967942 U CN 203967942U CN 201420324418 U CN201420324418 U CN 201420324418U CN 203967942 U CN203967942 U CN 203967942U
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CN
China
Prior art keywords
rotor
endcap
rotor endcap
sidewall
electric machine
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Fee Related
Application number
CN201420324418.3U
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Chinese (zh)
Inventor
杨泾涛
于明湖
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Guangdong Midea Toshiba Compressor Corp
Guangdong Meizhi Compressor Co Ltd
Original Assignee
Guangdong Meizhi Compressor Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
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Publication date
Application filed by Guangdong Meizhi Compressor Co Ltd filed Critical Guangdong Meizhi Compressor Co Ltd
Priority to CN201420324418.3U priority Critical patent/CN203967942U/en
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Publication of CN203967942U publication Critical patent/CN203967942U/en
Expired - Fee Related legal-status Critical Current
Anticipated expiration legal-status Critical

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Abstract

The utility model discloses a kind of rotor endcap of external rotor electric machine, in described rotor endcap, be formed with at least one oil through, wherein each described oil through departs from respect to the radial direction of described rotor endcap towards the edge of described rotor endcap from the center of described rotor endcap.According to the rotor endcap of external rotor electric machine of the present utility model, by the oil through of similar blade shape is set in rotor endcap, thereby reduce windage and noise when rotor endcap is rotated.

Description

The rotor endcap of external rotor electric machine and the external rotor electric machine with it
Technical field
The utility model relates to motor device field, especially relates to a kind of rotor endcap of external rotor electric machine and has its external rotor electric machine.
Background technology
In correlation technique, point out, permanent-magnet synchronous external rotor motor, motor stator external diameter is less than rotor internal diameter, rotor is connected with axle by end cap, due to the work characteristics of compressor, need on end cap, offer oil through, both can reduce the temperature rise of motor, also can increase logical pasta long-pending, but, on end cap, opened after oil through, rotor can increase windage, reduces power of motor, and generation aerodynamic noise, within motor is used for compressor time, the performance to compressor is produced to adverse influence, and make compressor there is larger noise.
Utility model content
The utility model is intended at least solve one of technical problem existing in prior art.For this reason, an object of the present utility model is to propose a kind of rotor endcap of external rotor electric machine, and the rotation windage of described rotor endcap is little, and aerodynamic noise is little.
Another object of the present utility model is to propose a kind of external rotor electric machine with above-mentioned rotor endcap.
According to the rotor endcap of the external rotor electric machine of the utility model first aspect, in described rotor endcap, be formed with at least one oil through, wherein each described oil through departs from respect to the radial direction of described rotor endcap towards the edge of described rotor endcap from the center of described rotor endcap.
According to the rotor endcap of external rotor electric machine of the present utility model, by the oil through of similar blade shape is set in rotor endcap, thereby reduce windage and noise when rotor endcap is rotated.
Particularly, each described oil through comprises first to fourth sidewall, described the first side wall and described the second sidewall are upwards spaced apart from each other in the footpath of described rotor endcap, described the 3rd sidewall is connected between described the first side wall and one end of described the second sidewall, and described the 4th sidewall is connected between described the first side wall and the other end of described the second sidewall.
Alternatively, described the first side wall and described the second sidewall are respectively one section of circular arc on two concentric circless.
Further, the arc length of described the first side wall is less than the arc length of described the second sidewall.Thus, gas can smoothly flow out oil through, reduces the windage that gas causes rotor endcap, reduces aerodynamic noise.
Again further, the curvature of described the 3rd sidewall is less than the curvature of described the 4th sidewall.Thus, gas can more smoothly flow out oil through, reduces the windage that gas causes rotor endcap, reduces aerodynamic noise.
Alternatively, the junction rounding off between described first to fourth sidewall.
Particularly, described oil through is multiple and described multiple oil throughs being circumferentially uniformly distributed along described rotor endcap.
Further, the quantity of described oil through is odd number.Thus, rotor endcap is formed as non-full symmetric structure, makes the overall structure form of rotor endcap more approach triangle, thereby makes rotor endcap structure more stable and have a better rigidity.
Alternatively, described rotor endcap is the frustum cone structure of slab construction or bottom-open.Thus, in the time of frustum cone structure that rotor endcap is bottom-open, gas is bottom-up during through rotor endcap, and the lower surface of rotor endcap can play the effect of water conservancy diversion, makes air-flow more steadily, flow out smoothly, thereby has reduced aerodynamic drag and aerodynamic noise.
According to the external rotor electric machine of the utility model second aspect, comprise according to the rotor endcap of the external rotor electric machine of the utility model first aspect.
According to external rotor electric machine of the present utility model, by the rotor endcap of external rotor electric machine of above-mentioned first aspect is set, thereby improve the overall performance of external rotor electric machine.
Additional aspect of the present utility model and advantage in the following description part provide, and part will become obviously from the following description, or recognize by practice of the present utility model.
Brief description of the drawings
Fig. 1 is according to the front view of the rotor endcap of the external rotor electric machine of an embodiment of the utility model;
Fig. 2 is according to the front view of the rotor endcap of the external rotor electric machine of another embodiment of the utility model;
Fig. 3 is the upward view that stator is not installed according to the external rotor electric machine of the utility model embodiment;
Fig. 4 is the upward view of the external rotor electric machine in Fig. 3.
Reference numeral:
1000: external rotor electric machine;
100: rotor endcap;
1: oil through; 11: the first side wall; 12: the second sidewalls;
13: the three sidewalls; 14: the four sidewalls;
2: installing hole;
200: stator core; 201: stator tooth; 202: stator slot; 203: armature winding;
300: machine shaft;
400: rotor core; 401: permanent magnet.
Embodiment
Describe embodiment of the present utility model below in detail, the example of described embodiment is shown in the drawings, and wherein same or similar label represents same or similar element or has the element of identical or similar functions from start to finish.Be exemplary below by the embodiment being described with reference to the drawings, be intended to for explaining the utility model, and can not be interpreted as restriction of the present utility model.
Describe according to the rotor endcap 100 of the external rotor electric machine 1000 of the utility model first aspect embodiment below with reference to Fig. 1-Fig. 4.
As shown in Figure 1, according to the rotor endcap 100 of the external rotor electric machine 1000 of the utility model first aspect embodiment.
Particularly, rotor endcap 100 can centered by the revolving body member that extends along the vertical direction of axis.For example, in the example of Fig. 1, the frustum cone structure that rotor endcap 100 is bottom-open, now the wall of rotor endcap 100 is configured to the upwardly extending inclined-plane that radially tilts from outside to inside along rotor endcap 100, make rotor endcap 100 substantially be formed as umbrella shape, thus, bottom-up when the rotor endcap 100 when gas, the lower surface of rotor endcap 100 can play the effect of water conservancy diversion, make air-flow more steadily, smoothly flow out, thereby reduced aerodynamic drag and aerodynamic noise.
Certainly, the utility model is not limited to this, for example, in the example of Fig. 2, rotor endcap 100 can also be slab construction, as circular flat plate structure, now the wall of rotor endcap 100 is configured to the radially horizontally extending plane from outside to inside along rotor endcap 100, makes rotor endcap 100 substantially be formed as horizontally disposed flat board, and rotor endcap 100 is projected as circle in horizontal plane.Here, it should be noted that, the shape of rotor endcap 100 can be according to actual requirement setting, to meet design requirement better.
Further, in rotor endcap 100, be formed with at least one oil through 1.As shown in figures 1 and 3, in rotor endcap 100, be formed with multiple oil throughs 1, each oil through 1 all runs through the wall of rotor endcap 100 along the vertical direction, certainly, the utility model is not limited to this, each oil through 1 can also be along the wall that runs through rotor endcap 100 perpendicular to the direction of rotor endcap 100 wall thickness, and wherein, in the time that rotor endcap 100 is slab construction, the structure of the oil through 1 obtaining by above-mentioned two kinds of makes is identical.
Wherein each oil through 1 departs from respect to the radial direction of rotor endcap 100 towards the edge of rotor endcap 100 from rotor endcap 100 center.For example, in the example of Fig. 3, each oil through 1 all has a central configuration line, and the expansion of circumferentially extending to both sides respectively that oil through 1 is configured to from center structural line along rotor endcap 100 forming, central configuration line and rotor endcap 100 radially between line stretcher, there is certain angle.
Preferably, central configuration line departs from towards the rightabout of the direction of rotation of rotor endcap 100.That is to say, in the time that the inner of center structural line extends to rotor endcap 100 center, cross the inner of central configuration line and make tangent line, this tangent line is datum line, central configuration line is all positioned at the same side of datum line, and in the time that rotor endcap 100 is rotated, datum line is positioned at the front of central configuration line all the time, and central configuration line is positioned at the rear of datum line all the time.For example, in the example of Fig. 3, shape and the blade shape of oil through 1 are similar, thereby when there being gas bottom-up from oil through 1 during through rotor endcap 100, the shape of oil through 1 can adapt to the flow direction of gas well, make gas more smoothly by rotor endcap 100, reduce the windage of gas to rotor endcap 100 and the noise producing.Here, it should be noted that, blade can be understood as blade related in field of fluid machinery, the blade of for example fan.
Particularly, in the time that rotor endcap 100 is rotated, and when gas bottom-up from oil through 1 during through rotor endcap 100, have upwards and along the radially outer movement tendency of rotor endcap 100 through the gas of oil through 1, and due to the inertia of gas have circumferential along rotor endcap 100, the movement tendency contrary with rotor endcap 100 direction of rotation, when the shape of oil through 1 and the blade of fan are when similar, the rotation of rotor endcap 100 is similar to the rotation of fan, thereby gas can smoothly flow out oil through 1, and then reduce the windage that gas causes rotor endcap 100, reduce the aerodynamic noise of rotor endcap 100.
According to the rotor endcap 100 of the external rotor electric machine 1000 of the utility model embodiment, by the oil through 1 of similar blade shape is set in rotor endcap 100, thereby reduce windage and noise when rotor endcap 100 is rotated.
In an embodiment of the present utility model, oil through 1 is multiple, multiple oil throughs 1 being circumferentially uniformly distributed along rotor endcap 100.For example, in the example of Fig. 3, in rotor endcap 100, be formed with multiple oil throughs 1, multiple oil throughs 1 were upwards evenly spaced apart each other in the week of rotor endcap 100, that is to say, angle between two oil throughs 1 of arbitrary neighborhood equates, alternatively, the shape of multiple oil throughs 1 is identical, equal and opposite in direction, thereby multiple oil throughs 1 are similar Central Symmetry about the axis of rotor endcap 100 to be arranged, that is to say, when rotor endcap 100 turns over after the angle of the angle between two oil throughs 1 of arbitrary neighborhood, can overlap with the rotor endcap 100 before rotation not.Like this, in the time that rotor endcap 100 is revolving body, and multiple while being about its axis the oil through 1 that similar Central Symmetry distributes when being formed with on it, rotor endcap 100 is formed as similar Central Symmetry part, and then rotor endcap 100 has run stability, good working effect.
Certainly, the utility model is not limited to this, multiple oil throughs 1 can also be not along being circumferentially evenly arranged of rotor endcap 100, for example, multiple oil throughs 1 can also be along the layout that is radially spaced of rotor endcap 100.
Alternatively, the quantity of oil through 1 is odd number.For example, in the example of Fig. 3, in rotor endcap 100, be formed with five oil throughs 1, and five rotors are similar Central Symmetry about the axis of rotor endcap 100 and distribute, thus, rotor endcap 100 is formed as non-full symmetric structure, make the overall structure form of rotor endcap 100 more approach triangle, thereby make rotor endcap 100 there is good stability and rigidity.Certainly, the utility model is not limited to this, according to the size of rotor endcap 100, the quantity of oil through 1 can also be according to actual requirement setting, to meet design requirement better, for example when the size of rotor endcap 100 hour, the quantity of oil through 1 can be three, in the time that the size of rotor endcap 100 is larger, the quantity of oil through 1 can be that seven, nine are even more.
In addition, it should be noted that, " non-full symmetric " refers to: in the time that odd number oil through 1 is uniformly distributed in rotor endcap 100, when to be odd number oil through 1 be similar Central Symmetry and distribute about the axis of rotor endcap 100, do a plane of crossing the axis of rotor endcap 100, in the time that this plane is not crossing with any oil through 1, the quantity that is positioned at so the oil through 1 of these plane both sides certainly will be different, thereby the overall structure that makes rotor endcap 100 is similar to triangle to be had the principle of stability and has stability, and then make the rotor endcap 100 with odd number oil through 1 there is good rigidity.
Further, with reference to Fig. 3, each oil through 1 comprises the first side wall 11, the second sidewall 12, the 3rd sidewall 13 and the 4th sidewall 14, the first side wall 11 and the second sidewall 12 are upwards spaced apart from each other in the footpath of rotor endcap 100, the 3rd sidewall 13 is connected between one end (example is A1 end as shown in Figure 3) of the first side wall 11 and one end (example is A2 end as shown in Figure 3) of the second sidewall 12, the 4th sidewall 14 is connected between the other end (example is B1 end as shown in Figure 3) of the first side wall 11 and the other end (example is B2 end as shown in Figure 3) of the second sidewall 12.
As shown in Figure 3, the first side wall 11 and the second sidewall 12 are respectively generally along the circumferential extension of rotor endcap 100, when rotor endcap 100 is taking its central axis as pivot during according to a direction rotation, one end of the first side wall 11 is positioned at the front of its other end all the time, one end that is positioned at all the time front of the first side wall 11 is A1 end, one end that is positioned at all the time rear of the first side wall 11 is B1 end, similar ground, one end of the second sidewall 12 is positioned at the front of its other end all the time, one end that is positioned at all the time front of the second sidewall 12 is A2 end, one end that is positioned at all the time rear of the second sidewall 12 is B2 end.
Further, with reference to Fig. 3, the first side wall 11 adjacent rotor end cap 100 centers arrange, the edge setting of the second sidewall 12 adjacent rotor end caps 100, and the first side wall 11 is upwards inside and outside corresponding in the footpath of rotor endcap 100 with the second sidewall 12, the 3rd sidewall 13 and the 4th sidewall 14 extend along the inward-outward direction of rotor endcap 100 respectively, and the inner of the 3rd sidewall 13 is connected with the A1 end of the first side wall 11, the outer end of the 3rd sidewall 13 is connected with the A2 end of the second sidewall 12, the inner of the 4th sidewall 14 is connected with the B1 end of the first side wall 11, the outer end of the 4th sidewall 14 is connected with the B2 end of the second sidewall 12, thereby in the time that rotor endcap 100 is rotated, the 3rd sidewall 13 is positioned at the front of the 4th sidewall 14 all the time.Thus, the first side wall 11, the 3rd sidewall 13, the second sidewall 12 and the 4th sidewall 14 head and the tail are connected to be formed in the tetragonal oil through 1 that is projected as in rotor endcap 100 in turn.
With reference to Fig. 3, the first side wall 11 and the second sidewall 12 are respectively one section of circular arc on two concentric circless.That is to say, the first side wall 11 and the second sidewall 12 are respectively formed on two concentric circles, and the first side wall 11 and the second sidewall 12 are respectively one section of circular arc on these two concentric circless.Particularly, in the time of structure the first side wall 11 and the second sidewall 12, can first in rotating shaft, make two concentric circles, preferably the center of circle of two circles all overlaps with the center of circle of rotor endcap 100, and then on two concentric circles, intercept respectively one section of circular arc, and ensure that two sections of circular arcs are upwards inside and outside corresponding in the footpath of rotor endcap 100.Thus, can obtain the first side wall 11 and the second sidewall 12.
Further, the 3rd sidewall 13 and the 4th sidewall 14 are also respectively one section of circular arc, and the curvature of the 3rd sidewall 13 is less than the curvature of the 4th sidewall 14.For example, in the example of Fig. 3, the 3rd sidewall 13 and the 4th sidewall 14 Yuan centers, place can be in the distributions that is upwards spaced apart from each other in the week of rotor endcap 100, and the 3rd sidewall 13 place radius of a circles are greater than the 4th sidewall 14 place radius of a circles, that is to say, the degree of crook of the 4th sidewall 14 is greater than the degree of crook of the 3rd sidewall 13, and the 3rd sidewall 13 is all consistent with the rotation direction of rotor endcap 100 with the recessed direction of the 4th sidewall 14.
Thus, in the time that rotor endcap 100 is rotated, and when gas bottom-up from oil through 1 during through rotor endcap 100, because gas has inertia, gas has along rotor endcap 100 circumferential, the movement tendency contrary with the direction of rotation of rotor endcap 100, that is to say, gas has the movement tendency of the 4th sidewall 14 that impacts oil through 1, because the degree of crook of the 4th sidewall 14 is larger, thereby the 4th sidewall 14 can play the effect of water conservancy diversion well, so that smoothly being guided, gas flows out oil through 1, and then reduce the windage that gas causes rotor endcap 100, reduce aerodynamic noise.
With reference to Fig. 3, the arc length of the first side wall 11 is less than the arc length of the second sidewall 12, thus adopt the area of section of the oil through 1 intercepting with the coaxial face of cylinder of rotor endcap 100, along rotor endcap 100 radially from inside to outside, there is the trend of increase substantially.Thus, in the time that rotor endcap 100 is rotated, and when gas bottom-up from oil through 1 during through rotor endcap 100, have upwards and along the radially outer movement tendency of rotor endcap 100 through the gas of oil through 1, because the area of section of oil through 1 outer end is larger, thereby the mobile trend of complying with well gas, reduces the windage that gas causes rotor endcap 100, and then can effectively reduce aerodynamic noise.
Further, with reference to Fig. 1, the junction rounding off between first to fourth sidewall 14.That is to say, the junction of the first side wall 11 and the 3rd sidewall 13 is rounding off, it can be for example round-corner transition, the junction of the 3rd sidewall 13 and the second sidewall 12 is rounding off, can be for example round-corner transition, the junction of the second sidewall 12 and the 4th sidewall 14 be rounding off, for example, can be round-corner transition, the junction of the 4th sidewall 14 and the first side wall 11 is also rounding off, for example, can be round-corner transition.Thus, the junction that surrounds four sidewalls of oil through 1 does not have sharp-pointed drift angle, thereby gas can bottom-uply can smoothly pass oil through 1, further less aerodynamic noise.
From the above mentioned, the shape of oil through 1 can be similar to the blade shape of fan, and in the time that the quantity of oil through 1 is odd number, make the rotation form of rotor endcap 100 be similar to the rotation form of fan blade, can greatly reduce windage and the aerodynamic noise of rotor endcap 100.
According to the external rotor electric machine 1000 of the utility model second aspect embodiment, comprise according to the rotor endcap 100 of the external rotor electric machine 1000 of the above-mentioned first aspect embodiment of the utility model.Wherein, external rotor electric machine 1000 can be external rotor permanent magnet synchronous machine or the external rotor electric machine of other types, only describes as an example of permagnetic synchronous motor example below.
Particularly, with reference to Fig. 3 and Fig. 4, external rotor electric machine 1000 also comprises: stator core 200, armature winding 203, machine shaft 300, rotor core 400 and permanent magnet 401, wherein, rotor core 400 links together by rotor endcap 100 and machine shaft 300, for example rotor endcap 100 center can be formed with installing hole 2, machine shaft 300 is through installing hole 2 and with together with the inwall interference fit of installing hole 2, rotor core 400 is substantially formed as the cylindrical shape of both ends open and is connected to the bottom of rotor endcap 100, rotor endcap 100 and rotor core 400 limit the chamber of bottom-open jointly, stator core 200 is located in chamber, permanent magnet 401 is arranged on the inner peripheral surface of rotor core 400 or is built in rotor core 400, stator core 200 has stator tooth 201 and stator slot 202, armature winding 203 be limited in stator slot 202 and winding on stator tooth 201.
Further, rotor endcap 100 can be one-body molded with rotor core 400, or point body formed be connected again.In the time that rotor endcap 100 and rotor core 400 are one-body molded, rotor endcap 100 can such as, be made by soft magnetic material (45# steel, 10# steel etc.) with rotor core 400, and rotor endcap 100 can be passed through drawing process one drawing and forming with rotor core 400.
When 400 points of rotor endcap 100 and rotor cores are body formed while being connected again, that is to say, in the time that rotor endcap 100 links together by the mode of assembling with rotor core 400, rotor endcap 100 can adopt non-magnetic material (such as stainless steel, copper or aluminium etc.) to make, to reduce rotor endcap 100 place's leakage fields, and rotor core 400 can be formed or be processed by soft magnetic material by silicon steel plate stacking, now, rotor endcap 100 can be fixed together by the mode of welding, being spirally connected or buckle being connected with rotor core 400.
Like this, after rotor core 400 is connected with rotor endcap 100, just can rotor core 400 and machine shaft 300 be linked together indirectly by rotor endcap 100, and strengthen the rigidity of rotor core 400 simultaneously.
This external rotor electric machine 1000 can be arranged in compressor (scheming not shown), provides power with the compressing mechanism in compressor, and then completes the compression to refrigerant.Particularly, compressor can comprise: housing, compressing mechanism and external rotor electric machine 1000, compressing mechanism is located at the bottom in housing, external rotor electric machine 1000 is located at the top in housing and is positioned at the top of compressing mechanism, compressing mechanism has cylinder, crankshaft and piston, external rotor electric machine 1000 is connected and rotates with driving crank with bent axle, bent axle drives piston to rotate in the compression chamber of cylinder, thereby the refrigerant entering in compression chamber is compressed, refrigerant after compression can be drained in housing by the exhaust outlet in cylinder portion, refrigerant moves upward and passes external rotor electric machine 1000, finally can discharge from the blast pipe of case top, but be not limited to this.
Like this, drive compression mechanism compression refrigerant when external rotor electric machine 1000 is worked, when the refrigerant after compression move upward and oil through rotor endcap 100 1 through time, due to the blade-shaped that is shaped as of oil through 1, thereby the suffered windage of rotor endcap 100 is less, and then reduce the aerodynamic noise of motor.Thus, in the case of ensureing that the area of oil through 1 is constant, improved the efficiency of motor, the aerodynamic noise while having reduced compressor operating, is improved the performance of whole compressor.
The shape of rotor endcap 100 can specifically arrange according to the geomery of compressor, with practical requirement better.For example, in the time that the axial space in compressor is sufficient, the preferential rotor endcap 100 that adopts umbrella-shaped structure, the rotor endcap 100 of umbrella-shaped structure can further reduce windage and the aerodynamic noise of external rotor electric machine 1000, but the rotor endcap 100 of umbrella-shaped structure is to strengthen the physical dimension of rotor endcap 100, so in the time being compressed the size restrictions of machine, that is to say, in the time that the axial space in compressor is not enough, the preferential rotor endcap 100 that adopts plate-like structure, to reduce the physical dimension of rotor endcap 100, and then reduce the axial dimension of external rotor electric machine 1000 entirety, meet assembling user demand.
According to the external rotor electric machine 1000 of the utility model embodiment, by the rotor endcap 100 of external rotor electric machine 1000 of above-mentioned first aspect embodiment is set, thereby improve the overall performance of external rotor electric machine 1000.
In description of the present utility model, it will be appreciated that, term " " center ", " thickness ", " on ", D score, " top ", " end ", " interior ", " outward ", " clockwise ", " counterclockwise ", " axially ", " radially ", orientation or the position relationship of instructions such as " circumferentially " are based on orientation shown in the drawings or position relationship, only the utility model and simplified characterization for convenience of description, instead of device or the element of instruction or hint indication must have specific orientation, with specific orientation structure and operation, therefore can not be interpreted as restriction of the present utility model.
In addition, term " first ", " second " be only for describing object, and can not be interpreted as instruction or hint relative importance or the implicit quantity that indicates indicated technical characterictic.Thus, one or more these features can be expressed or impliedly be comprised to the feature that is limited with " first ", " second ".In description of the present utility model, the implication of " multiple " is two or more, unless otherwise expressly limited specifically.
In the utility model, unless otherwise clearly defined and limited, the terms such as term " installation ", " being connected ", " connection ", " fixing " should be interpreted broadly, and for example, can be to be fixedly connected with, and can be also to removably connect, or integral; Can be to be directly connected, also can indirectly be connected by intermediary, can be the connection of two element internals or the interaction relationship of two elements.For the ordinary skill in the art, can understand as the case may be the concrete meaning of above-mentioned term in the utility model.
In the utility model, unless otherwise clearly defined and limited, First Characteristic Second Characteristic " on " or D score can be that the first and second features directly contact, or the first and second features are by intermediary indirect contact.And, First Characteristic Second Characteristic " on ", " top " and " above " but First Characteristic directly over Second Characteristic or oblique upper, or only represent that First Characteristic level height is higher than Second Characteristic.First Characteristic Second Characteristic " under ", " below " and " below " can be First Characteristic under Second Characteristic or tiltedly, or only represent that First Characteristic level height is less than Second Characteristic.
In the description of this specification, the description of reference term " embodiment ", " some embodiment ", " example ", " concrete example " or " some examples " etc. means to be contained at least one embodiment of the present utility model or example in conjunction with specific features, structure, material or the feature of this embodiment or example description.In this manual, to the schematic statement of above-mentioned term not must for be identical embodiment or example.And, specific features, structure, material or the feature of description can one or more embodiment in office or example in suitable mode combination.In addition,, not conflicting in the situation that, those skilled in the art can carry out combination and combination by the feature of the different embodiment that describe in this specification or example and different embodiment or example.

Claims (10)

1. the rotor endcap of an external rotor electric machine, it is characterized in that, in described rotor endcap, be formed with at least one oil through, wherein each described oil through departs from respect to the radial direction of described rotor endcap towards the edge of described rotor endcap from the center of described rotor endcap.
2. the rotor endcap of external rotor electric machine according to claim 1, it is characterized in that, each described oil through comprises first to fourth sidewall, described the first side wall and described the second sidewall are upwards spaced apart from each other in the footpath of described rotor endcap, described the 3rd sidewall is connected between described the first side wall and one end of described the second sidewall, and described the 4th sidewall is connected between described the first side wall and the other end of described the second sidewall.
3. the rotor endcap of external rotor electric machine according to claim 2, is characterized in that, described the first side wall and described the second sidewall are respectively one section of circular arc on two concentric circless.
4. the rotor endcap of external rotor electric machine according to claim 3, is characterized in that, the arc length of described the first side wall is less than the arc length of described the second sidewall.
5. the rotor endcap of external rotor electric machine according to claim 2, is characterized in that, the curvature of described the 3rd sidewall is less than the curvature of described the 4th sidewall.
6. the rotor endcap of external rotor electric machine according to claim 2, is characterized in that, the junction rounding off between described first to fourth sidewall.
7. the rotor endcap of external rotor electric machine according to claim 1, is characterized in that, described oil through is multiple and described multiple oil throughs being circumferentially uniformly distributed along described rotor endcap.
8. the rotor endcap of external rotor electric machine according to claim 7, is characterized in that, the quantity of described oil through is odd number.
9. according to the rotor endcap of the external rotor electric machine described in any one in claim 1-8, it is characterized in that, described rotor endcap is the frustum cone structure of slab construction or bottom-open.
10. an external rotor electric machine, is characterized in that, comprises according to the rotor endcap of the external rotor electric machine described in any one in claim 1-9.
CN201420324418.3U 2014-06-17 2014-06-17 The rotor endcap of external rotor electric machine and the external rotor electric machine with it Expired - Fee Related CN203967942U (en)

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Application Number Priority Date Filing Date Title
CN201420324418.3U CN203967942U (en) 2014-06-17 2014-06-17 The rotor endcap of external rotor electric machine and the external rotor electric machine with it

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105186819A (en) * 2014-06-17 2015-12-23 广东美芝制冷设备有限公司 Rotor end cover of outer-rotor-type motor and outer-rotor-type motor with rotor end cover

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105186819A (en) * 2014-06-17 2015-12-23 广东美芝制冷设备有限公司 Rotor end cover of outer-rotor-type motor and outer-rotor-type motor with rotor end cover
CN105186819B (en) * 2014-06-17 2018-01-23 广东美芝制冷设备有限公司 The rotor endcap of external rotor electric machine and there is its external rotor electric machine

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