CN204761189U - External rotor permanent magnetism direct current motor - Google Patents
External rotor permanent magnetism direct current motor Download PDFInfo
- Publication number
- CN204761189U CN204761189U CN201520430038.2U CN201520430038U CN204761189U CN 204761189 U CN204761189 U CN 204761189U CN 201520430038 U CN201520430038 U CN 201520430038U CN 204761189 U CN204761189 U CN 204761189U
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- permanent magnet
- casing
- direct current
- external rotor
- current machine
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Abstract
The utility model relates to an external rotor permanent magnetism direct current motor, its include rotor subassembly (1) and with stator module (2) of rotor subassembly (1) assembly, rotor subassembly (1) including casing (11) and install in permanent magnet (12) on casing (11), permanent magnet (12) install in the inside wall of casing (11), rotor subassembly (1) is still including increasing magnetic ring (13), increase magnetic ring (13) establish with permanent magnet (12) are corresponding on the outside conch wall of casing (11). The utility model has advantages of simple and reasonable structure design, it is with low costs, through addding the magnetic ring at motor housing, can make motor magnetic circuit widen, can effectively reduce the magnetic leakage, guaranteed the magnetic conductivity ability of permanent magnet, can make the performance of magnet steel can whole bring the mechanical characteristic hardening that just can make the motor into play.
Description
Technical field
The utility model relates to technical field of motors, particularly relates to a kind of external rotor permanent magnet direct current machine.
Background technology
For permanent magnet DC motor, at some using casing as in the application of magnetic conductive loop, usually there is certain requirement to the thickness of casing.Casing is too thin means that magnetic circuit is too narrow, and magnetic density is high, magnetic circuit just easy from air process, leakage field can be very serious, and the performance of magnet steel cannot without bringing into play completely.The processing method that casing uses mould punching shaping usually, but casing is too thick, and will become difficulty for stamping forming, the cost of heavy-gauge sheeting also can increase in addition.Machining thick plates processing tonnage is large, and larger to the damage of mould, general mould is all somewhat expensive.
Given this, a kind of passive magnetic suspension brushless D. C. motor is mentioned in Chinese patent 03133718.X, be made up of housing, stator, rotor, rotating shaft and two passive magnetic bearings with symmetrical structure, the stator core of motor is laid in the middle of in housing, left and right places the permanent magnetism outer shroud of two groups of passive magnetic bearings respectively, the permanent magnetism inner ring of rotor and two passive magnetic bearings is fixed in the rotating shaft that a non-magnet material makes, magnetic bearing permanent-magnetic clamp adopts axial charging, and rotor permanent magnet adopts radial magnetizing.Although this invention rotor adopts permanent magnetism inner ring and permanent magnetism outer shroud to run, and this structure is more complicated, installing/dismounting bothers all relatively, and cost is also higher, certain not enough due to structural design existing, therefore easily there is leakage field phenomenon, the mechanical property hardness of whole motor will be affected.
In another Chinese patent 200810059213.6, mention a kind of permanent magnet DC motor comprise in electric machine casing and be provided with stators and rotators, stator core is provided with winding coil, rotor shaft is provided with the magnetic core that discoid steel disc builds up, magnetic core periphery is fixed with rotor magnetic shoe, and motor is provided with the position sensing element comprising transducer magnet steel and Hall element.Transducer magnet steel is located in magnet steel seat, and magnet steel seat is fixed on the machine shaft that stretches out outside end cap, and transducer magnet steel and Hall element are located in the cavity that end cap and dust cap form.Although this direct current machine is little by external interference, due to the defect in structural design, but the magnetic property of motor permanent magnet is general, and easily occur leakage field, permanent magnet performance can not all be brought into play, and permanent magnet magnetic property cannot keep stable.
In sum, be necessary to do perfect further to prior art.
Utility model content
For problem set forth above, the utility model proposes a kind of structural design simple, reasonable, cost is low, magnetic circuit broadens, leakage field can be effectively reduced, ensure that the magnetic property of permanent magnet, the performance of magnet steel can be made all to bring into play and the external rotor permanent magnet direct current machine that the mechanical property of motor can be made hardening.
The utility model is achieved through the following technical solutions:
Above-mentioned external rotor permanent magnet direct current machine, the stator module comprising rotor assembly and assemble with described rotor assembly; Described rotor assembly comprises casing and is installed in the permanent magnet on described casing; Described permanent magnet is installed in the madial wall of described casing; Described rotor assembly also comprises increasing magnet ring; Described increasing magnet ring is located on the outside shell wall of the described casing corresponding with described permanent magnet.
Described external rotor permanent magnet direct current machine, wherein: described increasing magnet ring adopts strip material volume circle to make and inner ring surface is evenly laid with multiple riveted joint salient point; The outside shell wall of described casing is evenly laid with the riveted holes that multiple and described riveted joint salient point matches.
Described external rotor permanent magnet direct current machine, wherein: described increasing magnet ring is coordinating by described riveted holes and described riveted joint salient point, is fixedly connected on the outside shell wall of described casing.
Described external rotor permanent magnet direct current machine, wherein: described riveted joint salient point can be buckle-type clamping with described riveted holes.
Described external rotor permanent magnet direct current machine, wherein: described increasing magnet ring can adopt the mode of spot welding to be welded in the outside shell wall of described casing.
Described external rotor permanent magnet direct current machine, wherein: the overall structure in the form of annular discs of described casing, described casing adopts that the plate stamping of general thickness is shaping and inner side shell wall circumferentially offers ringwise permanent magnet mounting groove.
Described external rotor permanent magnet direct current machine, wherein: described permanent magnet is made up of multi-disc permanent magnetism tile, described multi-disc permanent magnetism tile to be evenly embedded in described permanent magnet mounting groove and to be connected and fixed with described permanent magnet mounting groove.
Beneficial effect:
The utility model external rotor permanent magnet DC motor structure simplicity of design, rationally, cost is low, magnetic circuit broadens, leakage field can be effectively reduced, ensure that the magnetic property of permanent magnet, the performance of magnet steel can be made all to bring into play and the mechanical property of motor can be made hardening, by setting up increasing magnet ring at casing outer wall, the magnetic circuit of whole rotor can be made to broaden, magnetic circuit is just unsaturated, leakage field will be little, the performance of such permanent magnet just can all be brought into play, the mechanical property of corresponding motor can be hard, after increasing magnet ring, outside the magnetic conduction that ensure that permanent magnet, cost compare is low.
Accompanying drawing explanation
Fig. 1 is the structural representation of the utility model external rotor permanent magnet direct current machine;
Fig. 2 is the exploded view of the rotor assembly of the utility model external rotor permanent magnet direct current machine;
Fig. 3 is the structural representation after the rotor assembly of the utility model external rotor permanent magnet direct current machine removes permanent magnet;
Fig. 4 is the structural representation after the rotor assembly assembling of the utility model external rotor permanent magnet direct current machine;
Fig. 5 is the structural representation after the casing of the utility model external rotor permanent magnet direct current machine decomposes with increasing magnet ring.
Embodiment
As shown in Fig. 1 to 5, the utility model external rotor permanent magnet direct current machine, the stator module 2 comprising rotor assembly 1 and be assemblied on rotor assembly 1.
This rotor assembly 1 comprises casing 11, permanent magnet 12, increases magnet ring 13 and splined couplers 14.
The overall structure in the form of annular discs of this casing 11, it adopts the plate stamping of general thickness shaping, saves material; Wherein, be provided with installing hole 111 in the middle part of at the bottom of this casing 11 shell, at the bottom of the shell of this casing 11, be also evenly laid with multiple pilot hole 112 along the circumference of installing hole 111; Also be evenly distributed with multiple bar hole 113 in the periphery being positioned at pilot hole 112 at the bottom of this casing 11 shell, the plurality of bar hole 113 is uniformly distributed ringwise; Meanwhile, the region at the bottom of this casing 11 shell between pilot hole 112 and bar hole 113 is evenly provided with multiple through hole 114 in " D " font, and the plurality of through hole 114 is also uniformly distributed ringwise and a side opening limit has all extended to form projection 115 in casing 11; The inner side shell wall of this casing 11 circumferentially offers ringwise permanent magnet mounting groove 116, and wherein, this casing 11 evenly offers multiple riveted holes 117 on the outside shell wall relative with permanent magnet mounting groove 116, turns up in the cell wall top of this casing 11; This casing 11 is also provided with bulge 118 at the bottom of inner casing.
This permanent magnet 12 is made up of multi-disc permanent magnetism tile, is connected and fixed in the permanent magnet mounting groove 116 that this multi-disc permanent magnetism tile is evenly embedded at this casing 11 with permanent magnet mounting groove 116.
This increasing magnet ring 13 is installed on this casing 11 to mate with permanent magnet 12 on corresponding outside shell wall, it adopts strip material volume circle to make and inner ring surface is evenly laid with multiple riveted joint salient point 131, and the plurality of riveted joint salient point 131 matches with the multiple riveted holes 117 on this casing 11; The internal diameter of this increasing magnet ring 13 is smaller a little than casing external diameter, and it is crimped on the outside shell wall of casing 11 by riveted holes 117 and being connected of salient point 131 of riveted joint.Wherein, the riveted joint salient point 131 of this increasing magnet ring 13 can adopt buckle structure, the riveted joint salient point 131 of such increasing magnet ring 13 just with the riveted holes 117 on shell wall outside casing 11 in buckle clamping, can effectively can ensure that increasing magnet ring 13 can not scatter, and ensures that increasing magnet ring 13 is fixed on casing 11 reliably.Meanwhile, this increasing magnet ring 13 also can adopt the mode of spot welding to be welded on the outside shell wall of casing 11.
This splined couplers 14 is assemblied in the middle part of this casing 11, and it comprises connecting axle 141 and to be stretched out the buck plate 142 formed by connecting axle 141 stage casing outer wall; This connecting axle 141 one end penetrates the installing hole 111 in the middle part of casing 11, and the pilot hole 112 that this buck plate 142 is equipped with casing 11 by screw 143 is fixedly assemblied in the middle part of this casing 11.
The utility model structural design is simple, rationally, cost is low, and magnetic circuit broadens, and can effectively reduce leakage field, ensure that the magnetic property of permanent magnet, the performance of magnet steel can be made all to bring into play and the mechanical property of motor can be made hardening, being suitable for propagation and employment.
The above; it is only the utility model preferred embodiment; not restriction the utility model being made to any other form, and any amendment done according to technical spirit of the present utility model or equivalent variations, still belong to the utility model scope required for protection.
Claims (7)
1. an external rotor permanent magnet direct current machine, the stator module (2) comprising rotor assembly (1) and assemble with described rotor assembly (1); Described rotor assembly (1) comprises casing (11) and is installed in the permanent magnet (12) on described casing (11); Described permanent magnet (12) is installed in the madial wall of described casing (11); It is characterized in that: described rotor assembly (1) also comprises increasing magnet ring (13); Described increasing magnet ring (13) is located on the outside shell wall of the described casing (11) corresponding with described permanent magnet (12).
2. external rotor permanent magnet direct current machine as claimed in claim 1, is characterized in that: described increasing magnet ring (13) adopts strip material volume circle to make and inner ring surface is evenly laid with multiple riveted joint salient point (131);
The outside shell wall of described casing (11) is evenly laid with the riveted holes (117) that multiple and described riveted joint salient point (131) matches.
3. external rotor permanent magnet direct current machine as claimed in claim 2, it is characterized in that: described increasing magnet ring (13) is coordinated by described riveted holes (117) and described riveted joint salient point (131), is fixedly connected on the outside shell wall of described casing (11).
4. external rotor permanent magnet direct current machine as claimed in claim 2, is characterized in that: described riveted joint salient point (131) and described riveted holes (117) are in buckle-type clamping.
5. external rotor permanent magnet direct current machine as claimed in claim 1, is characterized in that: described increasing magnet ring (13) adopts the mode of spot welding to be welded in the outside shell wall of described casing (11).
6. external rotor permanent magnet direct current machine as claimed in claim 1, it is characterized in that: the overall structure in the form of annular discs of described casing (11), described casing (11) adopts that the plate stamping of general thickness is shaping and inner side shell wall circumferentially offers ringwise permanent magnet mounting groove (116).
7. external rotor permanent magnet direct current machine as claimed in claim 6, it is characterized in that: described permanent magnet (12) is made up of multi-disc permanent magnetism tile, described multi-disc permanent magnetism tile to be evenly embedded in described permanent magnet mounting groove (116) and to be connected and fixed with described permanent magnet mounting groove (116).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520430038.2U CN204761189U (en) | 2015-06-19 | 2015-06-19 | External rotor permanent magnetism direct current motor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520430038.2U CN204761189U (en) | 2015-06-19 | 2015-06-19 | External rotor permanent magnetism direct current motor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204761189U true CN204761189U (en) | 2015-11-11 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520430038.2U Active CN204761189U (en) | 2015-06-19 | 2015-06-19 | External rotor permanent magnetism direct current motor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN204761189U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112838728A (en) * | 2020-12-30 | 2021-05-25 | 顺丰科技有限公司 | Birotor permanent magnet synchronous motor and working method thereof |
-
2015
- 2015-06-19 CN CN201520430038.2U patent/CN204761189U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112838728A (en) * | 2020-12-30 | 2021-05-25 | 顺丰科技有限公司 | Birotor permanent magnet synchronous motor and working method thereof |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C56 | Change in the name or address of the patentee | ||
| CP01 | Change in the name or title of a patent holder |
Address after: Wujin District 213011 of Jiangsu Province, Changzhou City Yaoguan Tong Road No. 19 Patentee after: JIANGSU LEILI MOTOR CO., LTD. Address before: Wujin District 213011 of Jiangsu Province, Changzhou City Yaoguan Tong Road No. 19 Patentee before: Changzhou Leshi Leili Electrical Appliance Co., Ltd. |