CN213027640U

CN213027640U - External rotor motor

Info

Publication number: CN213027640U
Application number: CN202022380437.6U
Authority: CN
Inventors: 傅雄高
Original assignee: Shijiazhuang Tongye Electric Manufacturing Co ltd
Current assignee: Shijiazhuang Tongye Electric Manufacturing Co ltd
Priority date: 2020-10-23
Filing date: 2020-10-23
Publication date: 2021-04-20
Anticipated expiration: 2030-10-23

Abstract

The utility model relates to an external rotor motor, which comprises a motor shell, wherein the motor shell comprises a cylindrical motor shell, a lower end cover and an upper end cover, the lower end cover and the upper end cover are buckled at the bottom and the top of the motor shell, the bottom end of the motor shell is provided with an annular inner edge, the inner edge is provided with a plurality of first threaded holes, the top end of the motor shell is provided with an annular outer edge, the outer edge is provided with a plurality of second threaded holes, and the outer edge is provided with a plurality of fan impeller mounting holes outside the second threaded holes; the outer edge of the lower end cover is provided with a plurality of threaded holes III corresponding to the threaded holes I, and the middle part of the inner side of the lower end cover is provided with a rotating groove I; a plurality of threaded holes IV corresponding to the threaded holes II are formed in the outer edge of the upper end cover, a second rotary groove is formed in the middle of the inner side of the upper end cover, and a shaft through hole is formed in the center of the bottom of the second rotary groove; and the motor shell and the magnetic steel form a rotor of the outer rotor motor.

Description

External rotor motor

Technical Field

The utility model relates to an external rotor electric machine specifically belongs to motor technical field.

Background

At present, in the manufacturing industry, the use of the motor is more and more popular, the requirement on the motor is higher and higher, and in order to improve the competitiveness of products in the industry, various motors are developed to meet the requirements of different customer groups. One of them is an external rotor motor, which is opposite to the general motor structure, with the rotor assembly outside and the stator assembly inside. The rotor has the advantages of large rotational inertia, good heat dissipation, copper wire saving, capability of directly embedding load elements such as a fan and the like on the rotor, and capability of meeting the requirement of small-volume complete machine installation size with certain power. With the progress of science and technology, people gradually adopt an outer rotor motor to replace an inner rotor motor, so that the space is saved, the energy consumption is reduced, and the noise is reduced. The outer rotor motor that uses in the current fan is the dual bracing motor, and the controller separately sets up with the motor, and the leakproofness is poor, and dustproof effect is poor. To the problem, the utility model provides an external rotor electric machine adopts single bearing structure, and the controller sets up together with the motor, and motor casing and controller shell are sealed effectual, and are dustproof effectual.

SUMMERY OF THE UTILITY MODEL

The utility model aims to solve the technical problem that an external rotor electric machine is provided, adopt single bearing structure, the controller sets up together with the motor, and motor casing and controller shell are sealed effectual, and are dustproof effectual.

In order to solve the above problems, the utility model adopts the following technical proposal:

an outer rotor motor comprises a motor shell, wherein the motor shell comprises a cylindrical motor shell, a lower end cover and an upper end cover, the lower end cover and the upper end cover are buckled at the bottom and the top of the motor shell, an annular inner edge is arranged at the bottom end of the motor shell, a plurality of threaded holes I are formed in the inner edge, an annular outer edge is arranged at the top end of the motor shell, a plurality of threaded holes II are formed in the outer edge, and a plurality of fan impeller mounting holes are formed in the outer side of the threaded holes II in the outer edge; the outer edge of the lower end cover is provided with a plurality of threaded holes III corresponding to the threaded holes I, and the middle part of the inner side of the lower end cover is provided with a rotating groove I; the outer edge of the upper end cover is provided with a plurality of threaded holes IV corresponding to the threaded holes II, the middle part of the inner side of the upper end cover is provided with a rotary groove II, the center of the bottom of the rotary groove II is provided with a shaft through hole, and the middle part of the outer side of the upper end cover is provided with a rotary groove III;

the inner side of the motor shell is fixedly provided with magnetic steel, and the motor shell and the magnetic steel form a rotor of the outer rotor motor; the motor casing middle part is equipped with the axle, epaxial stator that has set firmly, the axle lower extreme is inserted and is located in the swivelling chute one, the upper end is followed the axle via hole is worn out, all be equipped with the bearing between axle and swivelling chute one and the swivelling chute two, it is sealed to be equipped with the skeleton between axle and the swivelling chute three, the inside wire via hole that is equipped with in axle upper portion, the wire via hole is worn to be equipped with output conductor, output conductor with locate winding on the stator links to each other.

As a further improvement of the utility model, the lower end cover inner side is provided with an annular protrusion I, and the outer diameter of the protrusion I is matched with the inner diameter of the inner edge.

As a further improvement of the utility model, the upper end cover inboard is equipped with annular protruding two, protruding two external diameters with motor housing internal diameter looks adaptation.

As a further improvement, the bearing steel sleeve is arranged in the first rotating groove and the second rotating groove, and the bearing is arranged between the bearing steel sleeve and the shaft.

As a further improvement of the utility model, the shaft upper portion is equipped with the shaft shoulder, be equipped with the jump ring between the bearing in shaft shoulder and the swivelling chute two.

As a further improvement, the motor casing top is equipped with the controller shell, be equipped with the controller in the controller shell, the controller shell includes the controller drain pan and detains the controller epitheca of locating on it, controller drain pan middle part is equipped with the connecting hole, epaxial end with be in the same place through threaded connection between the connecting hole, wire via hole one end is established the side of the axle, the other end is established the axle top, the output wire is followed link to each other with the controller after the wire via hole is worn out.

As a further improvement of the utility model, the outer fringe of the controller bottom shell is provided with three annular protrusions, three inner diameters of the protrusions are matched with the outer diameter of the bottom of the controller top shell.

As a further improvement, the controller bottom casing is provided with an annular groove corresponding to the bottom of the controller top casing, and a sealing strip is arranged in the groove.

As a further improvement, the controller includes the circuit board and sets up inductance, electric capacity, power module and binding post in the circuit board top, the circuit board set firmly in the controller epitheca, the output conductor is followed after the wire via hole is worn out with binding post links to each other, controller epitheca lateral wall is equipped with the round hole, and external input conductor passes behind the round hole with binding post links to each other.

As a further improvement of the utility model, the controller epitheca top is equipped with the opening, the opening part card is equipped with rather than assorted lid.

Adopt the produced beneficial effect of above-mentioned technical scheme to lie in:

the utility model provides an external rotor electric machine adopts single bearing structure, and the controller is in the same place with the motor setting, and motor casing and controller shell are sealed effectual, and are dustproof effectual.

An annular first protrusion is arranged on the inner side of the lower end cover, and the outer diameter of the first protrusion is matched with the inner diameter of the inner edge. And the inner side of the upper end cover is provided with a second annular protrusion, and the outer diameter of the second annular protrusion is matched with the inner diameter of the motor shell. The first protrusion and the second protrusion are arranged, so that the sealing effect between the lower end cover and the motor shell and between the upper end cover and the motor shell are better. Through setting up rotatory groove three and sealed at its inner frame, make the leakproofness between axle and the motor casing is better.

The output lead is arranged in the lead through hole, so that the lead can be prevented from being exposed in the air and aging, and the sealing performance is good. The clamp springs are arranged at the bearing and the shaft shoulder in the second rotating groove, so that the bearing is tightly propped, and when the outer rotor motor generates heat to cause the shaft to be lengthened, the middle part of the shaft can play a role in buffering through the clamp springs after being lengthened, and the shaft shoulder is prevented from supporting and damaging the bearing.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the embodiments or the technical solutions in the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.

Fig. 1 is a schematic structural diagram of the present invention.

Fig. 2 is a partially enlarged schematic view at a in fig. 1.

Fig. 3 is a partially enlarged schematic view at B in fig. 1.

Fig. 4 is a schematic view of the split structure of the middle motor casing of the present invention.

Wherein: 1 motor shell, 1-1 inner edge, 1-1-1 threaded hole I, 1-2 outer edge, 1-2-1 threaded hole II, 1-2-2 fan impeller mounting hole, 2 lower end cover, 2-1 threaded hole III, 2-2 rotating groove I, 2-3 protuberant I, 3 upper end cover, 3-1 threaded hole IV, 3-2 rotating groove II, 3-3 protuberant II, 3-4 rotating groove III, 3-5 shaft through hole, 4 magnetic steel, 5 shaft, 5-1 lead through hole, 5-2 shaft shoulder, 6 stator, 7 clamp spring, 8 bearing, 9 bearing steel sleeve, 10 framework seal, 11 output lead, 12 controller bottom shell, 12-1 connecting hole, 12-2 protuberant III, 12-3 groove, 13 sealing strip, 14 controller upper shell, 14-1 round hole, 14-2 openings, 14-3 covers, 15 circuit boards, 16 input leads, 17 terminals.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention clearer, the following description of the present invention with reference to the accompanying drawings and specific embodiments is provided for clarity and completeness.

An external rotor motor as shown in fig. 1-4, which comprises a motor casing, wherein the motor casing comprises a cylindrical motor casing 1, and a lower end cover 2 and an upper end cover 3 fastened to the bottom and the top of the motor casing 1, an annular inner edge 1-1 is arranged at the bottom end of the motor casing 1, a plurality of threaded holes 1-1-1 are formed in the inner edge 1-1, an annular outer edge 1-2 is arranged at the top end of the motor casing 1, a plurality of threaded holes two 1-2-1 are formed in the outer edge 1-2, and a plurality of fan impeller mounting holes 1-2-2 are formed in the outer edge 1-2 and outside the threaded holes two 1-2-1; the outer edge of the lower end cover 2 is provided with a plurality of threaded holes III 2-1 corresponding to the threaded holes I1-1-1, and the middle part of the inner side of the lower end cover 2 is provided with a rotating groove I2-2; the outer edge of the upper end cover 3 is provided with a plurality of threaded holes four 3-1 corresponding to the threaded holes two 1-2-1, the middle part of the inner side of the upper end cover 3 is provided with a rotary groove two 3-2, the center of the bottom of the rotary groove two 3-2 is provided with a shaft through hole 3-5, and the middle part of the outer side of the upper end cover 3 is provided with a rotary groove three 3-4. An annular protrusion I2-3 is arranged on the inner side of the lower end cover 2, and the outer diameter of the protrusion I2-3 is matched with the inner diameter of the inner edge 1-1. The inner side of the upper end cover 3 is provided with a second annular protrusion 3-3, and the outer diameter of the second annular protrusion 3-3 is matched with the inner diameter of the motor shell 1. By arranging the annular first protrusions 2-3 and the annular second protrusions 3-3, the sealing effect between the lower end cover 2 and the upper end cover 3 and the motor shell 1 is better, and a better dustproof effect is achieved.

The inner side of the motor shell 1 is fixedly provided with a magnetic steel 4, and the motor shell and the magnetic steel 4 form a rotor of the outer rotor motor; the motor comprises a motor shell and is characterized in that a shaft 5 is arranged in the middle of the motor shell, a stator 6 is fixedly arranged on the shaft 5, the lower end of the shaft 5 is inserted into the first rotary groove 2-2, the upper end of the shaft penetrates out of the shaft through hole 3-5, bearings 8 are arranged between the shaft 5 and the first rotary groove 2-2 and between the shaft 5 and the second rotary groove 3-2, bearing steel sleeves 9 are arranged in the first rotary groove 2-2 and the second rotary groove 3-2, the bearings 8 are arranged between the bearing steel sleeves 9 and the shaft 5, a framework seal 10 is arranged between the shaft 5 and the third rotary groove 3-4, a lead through hole 5-1 is formed in the upper portion of the shaft 5, an output lead 11 penetrates through the lead through hole 5-1, and the output lead 11 is connected with a winding arranged on the stator. The sealing performance between the shaft 5 and the motor casing is better by arranging the three rotating grooves 3-4 and sealing the inner framework 10. One end of a shaft 5 of the outer rotor motor is arranged in a first rotating groove 2-2 on the lower end cover 2, the other end of the shaft penetrates out of the upper end cover 3, a single supporting structure is adopted, the controller and the motor are arranged together, the motor shell and the controller shell are good in sealing effect, and the dustproof effect is good. The output lead 11 is arranged in the lead through hole 5-1, so that the lead can be prevented from being exposed in the air and aging, and the sealing performance is good.

The upper portion of the shaft 5 is provided with a shaft shoulder 5-2, a clamp spring 7 is arranged between the shaft shoulder 5-2 and a bearing 8 in the second rotating groove 3-2, the clamp spring 7 tightly supports the bearing 8, and the middle portion of the shaft can play a role in buffering through the clamp spring 7 after the shaft 5 becomes long due to heating of the outer rotor motor, so that the bearing 8 is prevented from being damaged by the shaft shoulder 5-2.

The controller is characterized in that a controller shell is arranged above the motor shell, a controller is arranged in the controller shell, the controller shell comprises a controller bottom shell 12 and a controller upper shell 14 buckled on the controller bottom shell, a connecting hole 12-1 is formed in the middle of the controller bottom shell 12, the upper end of the shaft 5 is connected with the connecting hole 12-1 through threads, one end of the wire through hole 5-1 is formed in the side face of the shaft 5, the other end of the wire through hole is formed in the top end of the shaft 5, and the output wire 11 penetrates out of the wire through hole 5-1 and then is connected with the controller. The outer edge of the controller bottom shell 12 is provided with an annular protrusion III 12-2, and the inner diameter of the protrusion III 12-2 is matched with the outer diameter of the bottom of the controller upper shell 14, so that the sealing between the controller bottom shell 12 and the controller upper shell 14 is better. The controller bottom shell 12 is provided with an annular groove 12-3 corresponding to the bottom end of the controller upper shell 14, a sealing strip 13 is arranged in the groove 12-3, the sealing strip 13 is limited in the groove 12-3, and the sealing strip 13 can be prevented from displacing when the controller shell is disassembled and assembled.

The controller comprises a circuit board 15, and an inductor, a capacitor, a power module and a wiring terminal 17 which are arranged above the circuit board 15, wherein the circuit board 15 is fixedly arranged in the controller upper shell 14, the output lead 11 is connected with the wiring terminal 17 after penetrating out of the lead via hole 5-1, a round hole 14-1 is formed in the side wall of the controller upper shell 14, and an external input lead 16 is connected with the wiring terminal 17 after penetrating through the round hole 14-1. An opening 14-2 is formed in the top of the controller upper shell 14, and a cover 14-3 matched with the opening 14-2 is clamped at the opening. The opening 14-2 and the cover 14-3 are arranged to facilitate installation and plugging of the input wires 16.

Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it should be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; such modifications and substitutions do not depart from the spirit and scope of the embodiments of the present invention.

Claims

1. An outer rotor motor is characterized by comprising a motor shell, wherein the motor shell comprises a cylindrical motor shell (1), a lower end cover (2) and an upper end cover (3) which are buckled at the bottom and the top of the motor shell (1), an annular inner edge (1-1) is arranged at the bottom end of the motor shell (1), a plurality of threaded holes I (1-1-1) are formed in the inner edge (1-1), an annular outer edge (1-2) is arranged at the top end of the motor shell (1), a plurality of threaded holes II (1-2-1) are formed in the outer edge (1-2), and a plurality of fan impeller mounting holes (1-2-2) are formed in the outer side of the threaded holes II (1-2-1) on the outer edge (1-2); the outer edge of the lower end cover (2) is provided with a plurality of threaded holes III (2-1) corresponding to the threaded holes I (1-1-1), and the middle part of the inner side of the lower end cover (2) is provided with a rotating groove I (2-2); a plurality of threaded holes IV (3-1) corresponding to the threaded holes II (1-2-1) are formed in the outer edge of the upper end cover (3), a rotating groove II (3-2) is formed in the middle of the inner side of the upper end cover (3), a shaft through hole (3-5) is formed in the center of the bottom of the rotating groove II (3-2), and a rotating groove III (3-4) is formed in the middle of the outer side of the upper end cover (3);

the inner side of the motor shell (1) is fixedly provided with magnetic steel (4), and the motor shell and the magnetic steel (4) form a rotor of the outer rotor motor; the motor casing middle part is equipped with axle (5), stator (6) have set firmly on axle (5), axle (5) lower extreme is inserted and is located in swivelling chute (2-2), the upper end is followed axle via hole (3-5) are worn out, all be equipped with bearing (8) between axle (5) and swivelling chute (2-2) and swivelling chute two (3-2), be equipped with skeleton seal (10) between axle (5) and the swivelling chute three (3-4), axle (5) upper portion inside is equipped with wire via hole (5-1), wear to be equipped with output wire (11) in wire via hole (5-1), output wire (11) with locate winding on stator (6) links to each other.

2. The external rotor motor according to claim 1, wherein the inner side of the lower end cover (2) is provided with a ring-shaped protrusion I (2-3), and the outer diameter of the protrusion I (2-3) is matched with the inner diameter of the inner edge (1-1).

3. The external rotor motor according to claim 1, wherein the inner side of the upper end cover (3) is provided with a second annular protrusion (3-3), and the outer diameter of the second annular protrusion (3-3) is matched with the inner diameter of the motor housing (1).

4. The external rotor electric machine according to claim 1, wherein bearing steel sleeves (9) are arranged in the first rotary groove (2-2) and the second rotary groove (3-2), and the bearings (8) are arranged between the bearing steel sleeves (9) and the shaft (5).

5. The external rotor electric machine according to claim 1, characterized in that a shaft shoulder (5-2) is arranged at the upper part of the shaft (5), and a snap spring (7) is arranged between the shaft shoulder (5-2) and a bearing (8) in the second rotary groove (3-2).

6. The external rotor motor according to claim 1, wherein a controller shell is arranged above the motor shell, a controller is arranged in the controller shell, the controller shell comprises a controller bottom shell (12) and a controller upper shell (14) buckled on the controller bottom shell, a connecting hole (12-1) is formed in the middle of the controller bottom shell (12), the upper end of the shaft (5) is connected with the connecting hole (12-1) through a thread, one end of the lead through hole (5-1) is formed in the side surface of the shaft (5), the other end of the lead through hole is formed in the top end of the shaft (5), and the output lead (11) penetrates through the lead through hole (5-1) and then is connected with the controller.

7. The external rotor motor according to claim 6, wherein the controller bottom shell (12) is provided with an annular protrusion III (12-2) at the outer edge, and the inner diameter of the protrusion III (12-2) is matched with the outer diameter of the bottom of the controller upper shell (14).

8. The external rotor motor according to claim 6, wherein the controller bottom shell (12) is provided with an annular groove (12-3) corresponding to the bottom end of the controller upper shell (14), and a sealing strip (13) is arranged in the groove (12-3).

9. The external rotor motor according to claim 6, wherein the controller comprises a circuit board (15), and an inductor, a capacitor, a power module and a connection terminal (17) which are arranged above the circuit board (15), the circuit board (15) is fixedly arranged in the controller upper shell (14), the output lead (11) is connected with the connection terminal (17) after penetrating out of the lead through hole (5-1), a circular hole (14-1) is formed in the side wall of the controller upper shell (14), and an external input lead (16) is connected with the connection terminal (17) after penetrating through the circular hole (14-1).

10. The external rotor motor according to claim 6, wherein the controller upper shell (14) is provided with an opening (14-2) at the top, and a cover (14-3) matched with the opening (14-2) is clamped at the opening.