CN203617820U - External rotor electric machine - Google Patents
External rotor electric machine Download PDFInfo
- Publication number
- CN203617820U CN203617820U CN201320849646.8U CN201320849646U CN203617820U CN 203617820 U CN203617820 U CN 203617820U CN 201320849646 U CN201320849646 U CN 201320849646U CN 203617820 U CN203617820 U CN 203617820U
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- rotating shaft
- boss
- load
- electric machine
- casing
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- 238000000034 method Methods 0.000 abstract 1
- 238000010586 diagram Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
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Abstract
The utility model relates to the field of electric machines and especially relates to an external rotor electric machine. The external rotor electric machine comprises a stator, a rotor, a rotating shaft and a housing fixed outside the rotor, wherein the rotor sleeves outside the stator; one end of the rotating shaft is disposed in the center hole of the stator and forms rotating coordination through a bearing while the other end of the rotating shaft is fixedly connected with the housing; the central section, for allowing the rotating shaft to penetrate through, of the front end face of the housing protrudes to the outer side to form a boss; the boss is provided with a through hole for allowing the rotating shaft to penetrate through and is fixedly connected with the rotating shaft; a load is fixed on the boss; and the housing is provided with a driving convex column used for connecting with the load. The load is fixed on the boss, the boss is fixedly connected with the rotating shaft, and the weight of the load is transmitted directly onto the rotating shaft through the boss, such that the driving convex column drives the load to rotate when the rotor rotates, other parts of the housing do not bear the weight of the load or bear only part of the weight of the load, forces born by the other parts of the housing are notably reduced, requirements for bonding strength of the housing and the rotating shaft are low, the magnitude of interference for bonding the rotating shaft and the housing is reduced, the manufacturing technique is simplified, and the production efficiency is raised.
Description
Technical field
The utility model relates to machine field, particularly external rotor electric machine.
Background technology
Existing external rotor electric machine comprises stator 1, rotor 2, rotating shaft 3 and is fixed on the casing 4 of rotor outside, rotor is set in the outside of stator, one end of rotating shaft is placed in the mesopore of stator and is formed and be rotatably assorted by bearing between the two, the affixed casing 4 of the other end of rotating shaft 3.External rotor electric machine is that load 5 is directly installed on casing, as shown in Figure 4 in the time connecting load 5.Casing not only will be born the weight of load, also will bear rotating torque, thus very high to the bond strength requirement of casing and rotating shaft, if can not meeting the demands, intensity will break down, seriously reduce the useful life of motor.In order to guarantee to there is enough bond strengths, just need to increase rotating shaft and casing matching allowance, cause the difficulty in production technology.
Summary of the invention
It is high that the purpose of this utility model is to provide a kind of intensity, is convenient to the external rotor electric machine of producing.
For achieving the above object, the utility model has adopted following technical scheme: a kind of external rotor electric machine, comprise stator, rotor, rotating shaft and be fixed on the casing of rotor outside, rotor is set in the outside of stator, one end of rotating shaft is placed in the mesopore of stator and is formed and be rotatably assorted by bearing with it, the affixed casing of the other end of rotating shaft, the middle part of the front end face passing for rotating shaft on casing convexes to form boss toward the outer side, it is affixed that this boss is provided with the through hole that passes for rotating shaft and boss and rotating shaft, load is fixed on boss, described casing is provided with the driving projection for connecting load.
Owing to adopting above technical scheme, load is fixed on boss, boss and rotating shaft are affixed, the weight of load is directly delivered in rotating shaft by boss, be equivalent to rotating shaft support and bear load weight, when rotor rotates so, drive projection to drive load to rotate, now other position of casing is not born load weight or is only born part load weight, so the power of bearing on casing obviously reduces, low to the bond strength requirement of casing and rotating shaft, the magnitude of interference of rotating shaft and casing combination reduces so, simplify production technology, improved production efficiency.
Accompanying drawing explanation
Fig. 1 is structural representation of the present utility model;
Fig. 2 is the main cutaway view of Fig. 1;
Fig. 3 is the assembling schematic diagram of the utility model and load;
Fig. 4 is the assembling schematic diagram of existing external rotor electric machine and load.
Embodiment
As shown in Figure 1-2, a kind of external rotor electric machine, comprise stator 10, rotor 20, rotating shaft 30 and the casing 40 that is fixed on rotor outside, rotor 20 is set in the outside of stator 10, one end of rotating shaft 30 is placed in the mesopore of stator 10 and is formed and be rotatably assorted by bearing with it, the affixed casing 40 of the other end of rotating shaft 30, the middle part of the front end face 41 passing for rotating shaft 30 on casing 40 convexes to form boss 42 toward the outer side, it is affixed that this boss 42 is provided with the through hole that passes for rotating shaft 30 and boss 42 and rotating shaft 30, load 50 is fixed on boss 42, described casing 40 is provided with the driving projection 43 for connecting load 50.
Load 50 is fixed on boss 42, boss 42 and rotating shaft 30 are affixed, the weight of load 50 is directly delivered in rotating shaft 30, be equivalent to rotating shaft 30 and bear the whole or most of weight of load 50, when rotor rotates so, drive projection 43 to drive load 50 to rotate, because most of weight or the total weight of load 50 have been shared in rotating shaft 30, now the small part weight of torque or load 50 is only born at other position of casing 40, the Main Function that is to say casing 40 is transmitting torque, so the power of bearing on casing 40 obviously reduces, casing 40 and the bond strength of rotating shaft 30 are required to decrease, rotating shaft 30 and casing 40 magnitudes of interference reduce so, simplify production technology, improve production efficiency.
Described rotating shaft 30 overhangs to the outside of boss 42, and load 50 is fixed on the overhanging section and boss 42 of rotating shaft 30, interference fits between rotating shaft 30 and load 50, and boss 42 forms mesopore axle with load 50 and coordinates.As shown in Figure 3, rotating shaft 30 overhangs and is all positioned at the connecting hole of load 50 at the overhanging section in boss 42 outsides and boss 42, interference fits between rotating shaft 30 and load 50, boss 42 forms mesopore axle with load 50 and coordinates, total weight or most of weight of load 50 is born in rotating shaft 30 in this structure, that is to say that 40 of casings need to bear the effect of rotating torque, further reduce the magnitude of interference to casing 40 and rotating shaft 30 combinations.
The cylinder that described casing 40 is increased successively by three sections of diameters forms, and wherein the cylindrical section of diameter minimum forms boss 42, sheathed being fixed on rotor 20 of cylindrical section of diameter maximum, and the step surface between middle cylindrical section and boss 42 forms front end face 41.As shown in Figure 1, the structure of casing 40 is changed to a kind of statement, casing 40 comprises stepped cylinder and boss 42, the bigger diameter end of stepped cylinder is set on rotor 20 and is affixed with rotor 20, the middle part of the miner diameter end end face of stepped cylinder convexes to form boss 42 towards the side away from bigger diameter end, and this boss 42 is dead in line cylindric and its axis and stepped cylinder.The diameter of boss 42 is less than the miner diameter end diameter of stepped cylinder.The miner diameter end end face of stepped cylinder is front end face 41.
Described rotating shaft 30 is positioned on the axle journal of boss 42 through holes and is arranged with axle sleeve 31, and described rotating shaft 30 forms interference fit with the through hole of boss 42.Interference fit between rotating shaft 30 and axle sleeve 31, interference fit between axle sleeve 31 and boss 42, rotating shaft 30, axle sleeve 31 and boss 42 form an entirety, and rotating shaft 30 is along with casing 40 rotates.One end of rotating shaft 30 is by bearing fixed stator, and the other end is that casing 40 provides support.
Described driving projection 43 is positioned on front end face 41 and drives the direction that protrudes out of projection 43 to be parallel to rotating shaft 30.
Described driving projection 43 at least arranges two and be evenly distributed in rotating shaft 30 same circle ring area around.
Described driving projection 43 is cylindric and is provided with altogether three.Driving projection 43 is the equal of columned driving lever, protrudes toward the outer side from front end face 41.Front end face 41 is circular face, three actuating arms are evenly distributed on rotating shaft 30 around centered by the axis of rotating shaft 30, drive so projection 43 to rotate around rotating shaft 30, owing to driving, projection 43 is evenly spaced apart, the computing ballance correction being subject on casing 40 is evenly distributed, and effectively reduces amount of unbalance.The utility model shaft 30 or boss 42 can transmit a small amount of torque, also transmitting torque not.As shown in Figure 3, interference fits between load 50 and rotating shaft 30, total weight or most of weight of load 50 is born in rotating shaft 30 so, three drive the common transmitting torque of projection 43, be the equal of that needed load 50 rotating torque is disperseed to transmit, the effect that this shows casing 40 in the utility model is to transmit rotating torque, so the external rotor electric machine of this structure to casing 40 and rotating shaft 30 bond strengths require low, simplify production technology, improve production efficiency, the useful life of also having improved motor simultaneously.
Claims (7)
1. an external rotor electric machine, comprise stator (10), rotor (20), rotating shaft (30) and be fixed on the casing (40) of rotor outside, rotor (20) is set in the outside of stator (10), one end of rotating shaft (30) is placed in the mesopore of stator (10) and is formed and be rotatably assorted by bearing with it, the affixed casing of the other end (40) of rotating shaft (30), it is characterized in that: the middle part of the upper front end face (41) passing for rotating shaft (30) of casing (40) convexes to form boss (42) toward the outer side, this boss (42) is provided with for the through hole that passes of rotating shaft (30) and boss (42) and rotating shaft (30) affixed, load (50) is fixed on boss (42), described casing (40) is provided with the driving projection (43) for connecting load (50).
2. external rotor electric machine according to claim 1, it is characterized in that: described rotating shaft (30) overhangs to the outside of boss (42), load (50) is fixed on the overhanging section and boss (42) of rotating shaft (30), interference fits between rotating shaft (30) and load (50), boss (42) forms mesopore axle with load (50) and coordinates.
3. external rotor electric machine according to claim 1, it is characterized in that: the cylinder that described casing (40) is increased successively by three sections of diameters forms, wherein the cylindrical section of diameter minimum forms boss (42), sheathed being fixed on rotor (20) of cylindrical section of diameter maximum, the step surface between cylindrical section and boss (42) in the middle of being positioned at forms front end face (41).
4. external rotor electric machine according to claim 1 and 2, is characterized in that: described rotating shaft (30) is positioned on the axle journal of boss (42) through hole and is arranged with axle sleeve (31), and described rotating shaft (30) forms interference fit with the through hole of boss (42).
5. external rotor electric machine according to claim 1 and 2, is characterized in that: described driving projection (43) is positioned at front end face (41) direction that protrudes out upper and driving projection (43) and is parallel to rotating shaft (30).
6. external rotor electric machine according to claim 5, is characterized in that: described driving projection (43) at least arranges two and be evenly distributed in rotating shaft (30) same circle ring area around.
7. external rotor electric machine according to claim 6, is characterized in that: described driving projection (43) is cylindric and is provided with altogether three.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320849646.8U CN203617820U (en) | 2013-12-20 | 2013-12-20 | External rotor electric machine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320849646.8U CN203617820U (en) | 2013-12-20 | 2013-12-20 | External rotor electric machine |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203617820U true CN203617820U (en) | 2014-05-28 |
Family
ID=50770442
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201320849646.8U Expired - Lifetime CN203617820U (en) | 2013-12-20 | 2013-12-20 | External rotor electric machine |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203617820U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103730975A (en) * | 2013-12-20 | 2014-04-16 | 合肥凯邦电机有限公司 | External rotor motor |
| CN106533099A (en) * | 2016-12-30 | 2017-03-22 | 常州朗奇威电器有限公司 | Outer rotor alternating current motor |
-
2013
- 2013-12-20 CN CN201320849646.8U patent/CN203617820U/en not_active Expired - Lifetime
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103730975A (en) * | 2013-12-20 | 2014-04-16 | 合肥凯邦电机有限公司 | External rotor motor |
| CN106533099A (en) * | 2016-12-30 | 2017-03-22 | 常州朗奇威电器有限公司 | Outer rotor alternating current motor |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20140528 |