CN216122015U - Compact outer rotor motor and centrifugal fan thereof - Google Patents
Compact outer rotor motor and centrifugal fan thereof Download PDFInfo
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- CN216122015U CN216122015U CN202122798479.6U CN202122798479U CN216122015U CN 216122015 U CN216122015 U CN 216122015U CN 202122798479 U CN202122798479 U CN 202122798479U CN 216122015 U CN216122015 U CN 216122015U
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Abstract
The utility model relates to a compact outer rotor motor and a centrifugal fan thereof, comprising two stretching iron casings and a first screw, wherein the two stretching iron casings are folded and wrapped on the periphery of an outer rotor, and the folded part of the two stretching iron casings is an installation surface; the mounting surface is divided into a first mounting surface and a second mounting surface; the mounting surface is provided with mounting holes which are divided into a casing mounting hole and an impeller mounting hole, and a first screw penetrates through the casing mounting hole to fasten the mounting surface; the drawing iron casing further comprises a bearing cavity, the bearing cavity is convexly arranged at the tail end of the drawing iron casing, the bearing cavity is tightly attached to the outer contour of the bearing and wraps the bearing, and the output shaft penetrates through the bearing cavity. The utility model has the advantages that: (1) the mounting size of the motor shell is saved, and stator winding is facilitated; (2) strengthen fan mesodial structure and motor installation intensity, improve the holistic steadiness of fan.
Description
Technical Field
The utility model relates to the technical field of fan equipment, in particular to a compact outer rotor motor and a centrifugal fan thereof.
Background
The forward multi-wing centrifugal ventilator, called centrifugal fan for short, is a special device for conveying wind by utilizing the matching of a volute and an impeller; at present, in the market, an outer rotor motor is generally adopted when the diameter of an impeller is more than 220mm, and is arranged in the middle of the impeller to drive; this type fan can two side air intakes, and the air inlet is efficient, compact structure.
However, when the diameter of the impeller is less than 200mm, particularly up to 150mm, the impeller cannot be installed due to the large structural size of the matched motor; the stator is too small in size, and wire embedding and wiring are difficult; therefore, only a common inner rotor motor can be adopted, the inner rotor motor is fixedly arranged on an air inlet at one side of the fan, then the inner rotor motor is connected with the impeller through the rotating shaft to rotate, only air can be fed into one side of the fan, the air inlet efficiency is low, the corresponding air volume and air pressure are small, and the application is limited. In addition, when a small-size centrifugal fan is adopted in the market, a long-shaft air curtain machine motor is also commonly adopted, and the long-shaft air curtain machine motor is installed in the whole assembly, so that air inlet on two sides of the fan can be realized, the installation accuracy of an impeller is poor, the matching gap between the impeller and a volute needs to be large, and the corresponding air volume and the corresponding air pressure are also low.
In order to solve the above problems, further improvement of the structure of the motor and the centrifugal fan thereof is needed, and the installation size of the motor is reduced while the air supply effect of the centrifugal fan is not affected, so that the motor structure is suitable for the centrifugal fans with various sizes.
SUMMERY OF THE UTILITY MODEL
The utility model aims to provide a compact outer rotor motor and a centrifugal fan thereof, which can reduce the installation space of the motor, enhance the air guide effect and strengthen the strength of the whole structure of the fan.
In order to achieve the above object of the present invention, in a first aspect, the present invention provides a compact external rotor motor, including an output shaft, a bearing, an internal stator, and an external rotor, and characterized in that the compact external rotor motor includes two iron stretching cases and a first screw, the two iron stretching cases are folded and wrapped around the external rotor, and the folded part of the two iron stretching cases is an installation surface; the mounting surface is divided into a first mounting surface and a second mounting surface; the mounting surface is provided with mounting holes which are divided into a casing mounting hole and an impeller mounting hole, and the first screw penetrates through the casing mounting hole to fasten the mounting surface;
the drawing iron casing further comprises a bearing cavity, the bearing cavity is convexly arranged at the tail end of the drawing iron casing, the bearing cavity is tightly attached to the outer contour of the bearing and wraps the bearing, and the output shaft penetrates through the bearing cavity.
Further, the first mounting surface and the second mounting surface are both provided with the casing mounting holes and the impeller mounting holes, and the casing mounting holes and the impeller mounting holes are alternately arranged on the first mounting surface.
Preferably, the first mounting surface is provided with the casing mounting hole, the second mounting surface is provided with the impeller mounting hole, and the first mounting surface and the second mounting surface are both provided with a plurality of positioning holes.
Preferably, the casing mounting hole is a first stretching threaded hole, and the impeller mounting hole is a second stretching threaded hole.
As a further improvement of the utility model, the outside of bearing is equipped with the oil blanket, the oil blanket cover is established go out epaxial.
Preferably, the oil seal is a framework oil seal.
As a further improvement of the utility model, the binding wire of the inner stator is positioned inside the wire package of the inner stator.
In a second aspect of the present invention, a centrifugal fan is provided, which includes an impeller and a center plate, and is characterized by further including a second screw; the middle disc is provided with a plurality of abdicating holes and a plurality of fixing through holes, and the abdicating holes and the fixing through holes are alternately arranged between the inner ring of the middle disc and the impeller; and the second screw penetrates through the fixing through hole and the impeller mounting hole in sequence to fix the mounting surface at the position below the central disc.
The compact outer rotor motor and the centrifugal fan thereof have the advantages that the motor is wrapped by the stretching iron shell, the motor installation space is reduced, the bearing cavity forms the air guide surface, the air guide effect is improved, and the installation surface can be used as the installation surface of the motor and can also be used as the installation surface of the fan impeller. First installation face is equipped with first tensile screw hole, and the second installation face is equipped with the tensile screw hole of second, first installation face with the locating hole of second installation face plays the effect of mounting hole, removes the nut from, has both made things convenient for fastening first screw and second screw, has also reduced the trompil size in the hole of stepping down on the well dish, has strengthened the intensity of well dish, has improved whole centrifugal fan's steadiness.
Compared with the prior art, the compact outer rotor motor and the centrifugal fan thereof have the advantages that:
(1) the mounting size of the motor shell is saved, and stator winding is facilitated;
(2) strengthen fan mesodial structure and motor installation intensity, improve the holistic steadiness of fan.
Drawings
FIG. 1 is a schematic structural diagram of a compact external rotor motor;
fig. 2 is a sectional view of a compact outer rotor motor;
FIG. 3 is a schematic view of a mounting surface structure according to the first embodiment;
FIG. 4 is a schematic view of a mounting surface structure of the second embodiment;
FIG. 5 is a schematic structural diagram of a compact external rotor motor and a centrifugal fan thereof;
FIG. 6 is a schematic diagram of a structure of the middle plate;
FIG. 7 is a schematic view of a motor fixing manner;
fig. 8 is a schematic view of a preferred fixing mode of the motor.
Detailed Description
The utility model is further described below with reference to the following figures and specific examples.
In the first embodiment, as shown in fig. 1 and fig. 2, the compact outer rotor motor of the present invention includes two iron stretching machine cases 3 and a first screw 35, the two iron stretching machine cases 3 are folded and wrapped around the outer rotor 11, and the folded part of the two iron stretching machine cases 3 is the mounting surface 31; the mounting surface 31 is divided into a first mounting surface 311 and a second mounting surface 312; the mounting surface 31 is provided with a mounting hole 33, the mounting hole 33 is divided into a casing mounting hole 331 and an impeller mounting hole 332, and a first screw 35 passes through the casing mounting hole 331 to fasten the mounting surface 31;
the stretch iron shell 3 further comprises a bearing cavity 32, the bearing cavity 32 is convexly arranged at the tail end of the stretch iron shell 3, the bearing cavity 32 is tightly attached to the outer contour of the bearing 2 and wraps the bearing 2, and the output shaft 1 penetrates through the bearing cavity 32.
In this embodiment, the thickness of the iron case 3 is thinner than that of a general cast iron case or an aluminum alloy case, and more winding space can be reserved for the inner stator 12 of the motor. The mounting surface 31 between the two stretching iron casings 3 can be used as a mounting surface of the motor and a mounting surface of the fan impeller 5, so that the mounting space of the motor can be saved. The tensile iron casing 3 has good ductility, the bearing cavity 32 can be tightly attached to the outer contour of the bearing 2 and wrap the bearing 2 to form a wind guide surface, and the wind guide effect inside the fan is enhanced.
The cover is equipped with waterproof rubber sleeve 4 on the motor play axle 1, and waterproof rubber sleeve 4 is the toper, and waterproof rubber sleeve 4's pot head is gone out epaxial 1, and waterproof rubber sleeve 4's the other end covers the outside of bearing chamber 32, and the comdenstion water is thrown away along the wind-guiding face of bearing chamber 32 along high-speed rotatory motor shaft, and the water droplet can not cause the corrosion in the pivot infiltration advances the motor.
In order to enhance the sealing performance of the bearing 2, an oil seal may be disposed outside the bearing 2, and the oil seal is sleeved on the output shaft 1, preferably, a skeleton oil seal (the skeleton oil seal is an existing device, not shown in the figure), and the skeleton oil seal rotates along with the iron stretch casing 3, and the oil seal lip performs sliding sealing on the bearing 2.
As shown in fig. 3, the enclosure mounting holes 331 are used to fix two tension iron enclosures 3, the impeller mounting holes 332 are used to mount the motor on the impeller 5 in the later period, and the enclosure mounting holes 331 and the impeller mounting holes 332 are alternately arranged on the first mounting surface 311, so that the distribution areas of the two mounting holes 33 are relatively uniform, and the motor can be more stably mounted on the fan impeller 5.
The thickness of the fan middle disc 6 and the mounting surface 31 is small, so that the nut is not easy to screw. In order to fasten the first screw 35, the housing mounting hole 331 on the first mounting surface 311 is a first stretching threaded hole 36, the second mounting surface 312 is additionally provided with a plurality of housing mounting holes 331, the first screw 35 only needs to sequentially penetrate through the housing mounting hole 331 on the second mounting surface 312 and the first stretching threaded hole 36 on the first mounting surface 311 to fasten the mounting surface 31, nut installation is omitted, and the overall structure of the motor is more compact.
Since the outer rotor 11 is outside the inner stator 12, the inner cavity of the inner stator 12 does not need to reserve space for the rotor, and therefore, the binding wires of the inner stator 12 are positioned inside the wire package, the height of the wire package can be reduced, and the size of the motor can be reduced.
In the second embodiment, as shown in fig. 5, 6, and 7, the centrifugal fan of the present invention includes an impeller 5 and a central disk 6, wherein the central disk 6 is provided with a plurality of relief holes 61 and a plurality of fixing through holes 62, and the relief holes 61 and the fixing through holes 62 are alternately arranged between the inner ring of the central disk 6 and the impeller 5; the second screw 63 sequentially penetrates through the fixing through hole 62 and the impeller mounting hole 332 to fix the mounting surface 31 at the lower position of the central disc 6; the first screw 314 passes through the abdicating hole 61 to ensure that the central disc 6 is tightly attached to the mounting surface 31.
If the head of the first screw 35 faces upwards, the size of the opening of the abdicating hole 61 needs to be larger than the size of the head of the first screw 35, and since the size of the central disc 6 is limited, and the size of the opening of the abdicating hole 61 is too large, the distance between the abdicating hole 61 and the inner ring edge of the central disc 6 is too short, the wall thickness becomes small, and the motor is easy to crack, thereby affecting the installation strength of the motor.
To facilitate mounting of the motor, the first mounting surface 311 is provided with a housing mounting hole 331, the second mounting surface 312 is provided with an impeller mounting hole 332, and the impeller mounting hole 332 is preferably a second tension screw hole 37.
As shown in fig. 8, the first stretching threaded hole 36 protrudes upwards to pass through the abdicating hole 61, and the opening size of the abdicating hole 61 only needs to be larger than the size of the first stretching threaded hole 36, so that the opening size of the abdicating hole 61 is reduced, the wall thickness between the opening size and the inner ring of the middle disc 6 is increased, and the strength of the middle disc 6 is increased.
In addition, when the first stretching threaded hole 36 and the second stretching threaded hole 37 are drilled, a plurality of positioning holes 34 need to be additionally formed in the mounting surface 31, and the thickness of the stretching iron casing 3 is small, so that the number of holes formed in the mounting surface 31 is too large, and the strength of the whole mounting surface 31 is affected. As shown in fig. 4, the positioning hole 34 may correspond to the first stretching threaded hole 36 and the second stretching threaded hole 37, and respectively perform the same function as the mounting hole 33, that is, the first screw 35 sequentially passes through the positioning hole 34 of the second mounting surface 312 and the first stretching threaded hole 36 of the first mounting surface 311 to fasten the mounting surface 31, and the second screw 63 sequentially passes through the fixing through hole 62, the positioning hole 34 of the first mounting surface 311, and the second stretching threaded hole 37 of the second mounting surface 312 to fix the mounting surface 31 at the lower position of the key bed 6, so that the existence of an extra positioning hole 34 on the mounting surface 31 is avoided, and the strength of the mounting surface 31 is increased.
The compact outer rotor motor and the centrifugal fan thereof adopt the stretching iron casing 3 to wrap the motor, thereby reducing the installation space of the motor, forming the wind guide surface by the bearing cavity 32 and improving the wind guide effect, and the installation surface 311 can be used as the installation surface of the motor and also can be used as the installation surface of the fan impeller 5. First installation face 311 is equipped with first tensile screw hole 36, and the second installation face is equipped with the tensile screw hole 37 of second, first installation face with the locating hole 34 of second installation face plays the effect of mounting hole 33, removes the nut from, has both made things convenient for fastening first screw 35 and second screw 63, has also reduced the trompil size of hole 61 of stepping down on the well dish 6, has strengthened the intensity of well dish 6, has improved whole centrifugal fan's steadiness.
Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention, and that variations, modifications, substitutions and alterations can be made to the above embodiments by those of ordinary skill in the art within the scope of the present invention.
Claims (9)
1. The compact outer rotor motor comprises an output shaft, a bearing, an inner stator and an outer rotor, and is characterized by comprising two stretching iron machine cases and a first screw, wherein the two stretching iron machine cases are folded and wrapped on the periphery of the outer rotor, and the folded part of the two stretching iron machine cases is an installation surface; the mounting surface is divided into a first mounting surface and a second mounting surface; the mounting surface is provided with mounting holes which are divided into a casing mounting hole and an impeller mounting hole, and the first screw penetrates through the casing mounting hole to fasten the mounting surface;
the drawing iron casing further comprises a bearing cavity, the bearing cavity is convexly arranged at the tail end of the drawing iron casing, the bearing cavity is tightly attached to the outer contour of the bearing and wraps the bearing, and the output shaft penetrates through the bearing cavity.
2. The compact external rotor motor according to claim 1, wherein the first mounting surface and the second mounting surface are each provided with the casing mounting holes and the impeller mounting holes, and the casing mounting holes and the impeller mounting holes are alternately arranged on the first mounting surface.
3. The compact external rotor motor according to claim 1, wherein the first mounting surface is provided with the housing mounting hole, the second mounting surface is provided with the impeller mounting hole, and the first mounting surface and the second mounting surface are each provided with a plurality of positioning holes.
4. The compact external rotor motor according to any one of claims 1 to 3, wherein the housing mounting hole is a first tensile threaded hole, and the impeller mounting hole is a second tensile threaded hole.
5. The compact external rotor motor according to claim 1, wherein a waterproof rubber sleeve is sleeved on the output shaft, the waterproof rubber sleeve is tapered, one end of the waterproof rubber sleeve is sleeved on the output shaft, and the other end of the waterproof rubber sleeve covers the outside of the bearing cavity.
6. The compact external rotor electric motor according to claim 1, wherein an oil seal is provided on an outer side of the bearing, and the oil seal is fitted over the output shaft.
7. The compact external rotor electric motor according to claim 6, wherein the oil seal is a skeleton oil seal.
8. The compact external rotor motor according to claim 1, wherein the inner stator binding is located inside the inner stator winding.
9. A centrifugal fan comprising an impeller and a center disk, characterized by comprising the compact outer rotor motor according to any one of claims 1 to 8; the screw further comprises a second screw; the middle disc is provided with a plurality of abdicating holes and a plurality of fixing through holes, and the abdicating holes and the fixing through holes are alternately arranged between the inner ring of the middle disc and the impeller; and the second screw penetrates through the fixing through hole and the impeller mounting hole in sequence to fix the mounting surface at the position below the central disc.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122798479.6U CN216122015U (en) | 2021-11-15 | 2021-11-15 | Compact outer rotor motor and centrifugal fan thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122798479.6U CN216122015U (en) | 2021-11-15 | 2021-11-15 | Compact outer rotor motor and centrifugal fan thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN216122015U true CN216122015U (en) | 2022-03-22 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202122798479.6U Active CN216122015U (en) | 2021-11-15 | 2021-11-15 | Compact outer rotor motor and centrifugal fan thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN216122015U (en) |
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2021
- 2021-11-15 CN CN202122798479.6U patent/CN216122015U/en active Active
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