CN217692895U

CN217692895U - Brushless motor with outer rotor

Info

Publication number: CN217692895U
Application number: CN202123322009.9U
Authority: CN
Inventors: 朱杰
Original assignee: Beisicao Electronics Suzhou Co ltd
Current assignee: Beisicao Electronics Suzhou Co ltd
Priority date: 2021-12-27
Filing date: 2021-12-27
Publication date: 2022-10-28
Anticipated expiration: 2031-12-27

Abstract

The utility model discloses an external rotor brushless motor, concretely relates to brushless motor technical field, current brushless motor is single bearing structure mostly, this kind of structure bearing capacity is relatively poor, aggravate the wearing and tearing of rotor isotructure easily, and then shorten brushless motor's life, which comprises an outer shell, stator core's central point position activity runs through there is the rotor subassembly, the end fixing of rotor subassembly pivot is equipped with power output shaft, logical groove has been seted up to the one end of keeping away from the shell of rotor protecgulum, power output shaft's one end activity runs through logical groove, the fixed cover in power output shaft's the outside is equipped with the fore bearing, through installing the inside in logical groove with the fore bearing, and install the rotor protecgulum on the shell, make power output shaft's one end run through the fore bearing, again with the installation shell of rotor back lid, and make the tip card of rotor subassembly pivot establish the inside of rear bearing, just so can avoid appearing the relatively poor condition that leads to the part wearing and tearing, thereby reach the purpose that improves bearing capacity.

Description

Brushless motor with outer rotor

Technical Field

The utility model relates to a brushless motor technical field specifically is an external rotor brushless motor.

Background

The brushless motor is composed of a motor main body and a driver, and is a typical electromechanical integration product. Because the brushless DC motor is operated in a self-control mode, a starting winding is not additionally arranged on a rotor like a synchronous motor which is started under the condition of heavy load under the condition of frequency conversion and speed regulation, and oscillation and step-out can not be generated when the load suddenly changes.

1. Most of the existing brushless motors are of single-bearing structures, the bearing capacity of the structures is poor, the abrasion of structures such as rotors is easy to aggravate, parts need to be replaced, and the service life of the brushless motors is further shortened;

2. the existing heat dissipation structure of the brushless motor is mostly provided with a heat dissipation groove on a shell, so that the heat dissipation effect of the structure is poor, the situation of motor overheating protection is easy to occur after long-time use, and therefore an outer rotor brushless motor is provided for solving the problems.

SUMMERY OF THE UTILITY MODEL

The technical insufficiency to the aforesaid exists, the utility model aims at providing an external rotor brushless motor to solve the problem that proposes among the above-mentioned background art.

In order to solve the technical problem, the utility model adopts the following technical scheme: the utility model provides an external rotor brushless motor, which comprises a shell, wherein a rotor front cover is fixedly arranged at one end of the shell, and a rotor rear cover is fixedly arranged at the far end of the shell rotor front cover;

a stator core is movably arranged in the shell, a stator winding is arranged in a stator groove of the stator core, a rotor assembly movably penetrates through the center part of the stator core, a power output shaft is fixedly arranged at the end part of a rotating shaft of the rotor assembly, a through groove is formed in one end, far away from the shell, of the front cover of the rotor, one end of the power output shaft movably penetrates through the through groove, a front bearing is fixedly sleeved on the outer side of the power output shaft, the outer side of the front bearing is clamped in the through groove,

preferably, a heat pipe penetrates through one end of the stator core, the part of the heat pipe, which is close to the rotor front cover, is arc-shaped, and fan blades are fixedly sleeved at the end part of the rotor assembly rotating shaft.

Preferably, the fixed bearing frame that is equipped with in one side of keeping away from the shell of lid behind the rotor, the bearing frame is close to the rotor and has seted up the bearing groove in one side of lid behind the rotor, the inside fixing clip in bearing groove is equipped with the rear bearing, the one end activity that the rotor protecgulum was kept away from in the rotor subassembly pivot runs through the inside that lid and fixing clip established the rear bearing behind the rotor.

Preferably, a plurality of front radiating holes distributed in an annular array are formed in one side, close to the shell, of the rotor front cover, and a plurality of rear radiating holes distributed in an annular array are formed in one side, close to the shell, of the rotor rear cover.

Preferably, one end of the outer side of the shell, which is close to the front cover of the rotor, is provided with a plurality of ventilation openings distributed in an annular array.

Preferably, the diameter of the fan blades is smaller than the inner diameter of the housing.

Compared with the prior art, the beneficial effects of the utility model reside in that:

1. by arranging the front bearing, the front bearing is arranged inside the through groove, the rotor front cover is arranged on the shell, one end of the power output shaft penetrates through the front bearing, the rotor rear cover is arranged on the shell, and the end part of the rotating shaft of the rotor assembly is clamped inside the rear bearing, so that the condition that parts are abraded due to poor bearing of the brushless motor can be avoided, and the purpose of improving the bearing capacity is achieved;

2. through being equipped with the flabellum, drive the rotor subassembly through electromagnetic induction and rotate, the pivot of rotor subassembly drives the flabellum and rotates, and the flabellum rotates and produces suction and takes away the heat pipe from stator core absorptive heat to discharge through ventilative mouthful, just so can avoid the too high condition that leads to shutting down of motor operating temperature, thereby reach the purpose that improves the radiating effect.

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 description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only 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 view of the present invention.

Fig. 2 is a schematic structural section view of the present invention.

Fig. 3 is a right side view of the structure of the present invention.

Fig. 4 is a schematic view of the bearing seat structure of the present invention.

Description of the reference numerals: 1. a housing; 2. a rotor front cover; 3. a rotor rear cover; 4. a power take-off shaft; 5. a through groove; 6. a front bearing; 7. a ventilation opening; 8. front heat dissipation holes; 9. a fan blade; 10. a heat pipe; 11. a stator core; 12. a stator winding; 13. a bearing seat; 14. rear heat dissipation holes; 15. a bearing groove; 16. a rear bearing; 17. A rotor assembly.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

Example (b): as shown in fig. 1-4, the present invention provides an external rotor brushless motor, which comprises a housing 1, wherein a rotor front cover 2 is fixedly installed at one end of the housing 1, and a rotor rear cover 3 is fixedly installed at the end of the housing 1, far away from the rotor front cover 2;

a stator core 11 is movably arranged in the shell 1, a stator winding 12 is arranged in a stator groove of the stator core 11, a rotor assembly 17 movably penetrates through the center part of the stator core 11, a power output shaft 4 is fixedly arranged at the end part of a rotating shaft of the rotor assembly 17, a through groove 5 is arranged at one end of the rotor front cover 2 far away from the shell 1, a through groove 5 is movably arranged at one end of the power output shaft 4, a front bearing 6 is fixedly sleeved on the outer side of the power output shaft 4, the outer side of the front bearing 6 is clamped in the through groove 5, a bearing seat 13 is fixedly arranged at one side of the rotor rear cover 3 far away from the shell 1, a bearing groove 15 is arranged at one side of the bearing seat 13 close to the rotor rear cover 3, a rear bearing 16 is fixedly clamped in the inner part of the bearing groove 15, one end of the rotating shaft of the rotor assembly 17 far away from the rotor front cover 2 movably penetrates through the rotor rear cover 3 and is fixedly clamped in the rear bearing 16, through installing stator core 11 and stator winding 12 in the inside of shell 1, insert shell 1 and run through stator core 11 with rotor subassembly 17 again, install flabellum 9 in rotor subassembly 17's the pivot afterwards, install power output shaft 4 in the tip of rotor subassembly 17 pivot again, install the inside of logical groove 5 with front bearing 6 subsequently, and install rotor protecgulum 2 on shell 1, make power output shaft 4's one end run through front bearing 6, again with the rotor on the installation shell 1 of lid 3 behind the rotor, and make the tip card of rotor subassembly 17 pivot establish the inside at back bearing 16, just so can avoid appearing the poor condition that leads to the part wearing and tearing of brushless motor bearing, thereby reach the purpose that improves bearing capacity.

Fixed being equipped with of stator core 11 one end has run through heat pipe 10, the position that heat pipe 10 is close to rotor protecgulum 2 is circular-arcly, the end fixing cover of rotor subassembly 17 pivot is equipped with flabellum 9, the diameter of flabellum 9 is less than the internal diameter of shell 1, the one end that the shell 1 outside is close to rotor protecgulum 2 is seted up a plurality of and is ventilative mouthful 7 that the ring array distributes, it rotates to drive rotor subassembly 17 through electromagnetic induction, rotor subassembly 17's pivot drives flabellum 9 and rotates, flabellum 9 rotates and produces suction and takes away heat pipe 10 from 11 absorptive heats of stator core, and discharge through ventilative mouthful 7, just so can avoid the too high condition that leads to shutting down of motor operating temperature, thereby reach the purpose that improves the radiating effect.

Rotor protecgulum 2 is close to one side of shell 1 and has seted up a plurality of and is the preceding louvre 8 that the annular array distributes, and lid 3 is close to one side of shell 1 behind the rotor and has seted up a plurality of and be the back louvre 14 that the annular array distributes, through being equipped with preceding louvre 8 and back louvre 14, the radiating effect that like this can improve to reach quick radiating purpose.

Working principle; firstly, install stator core 11 and stator winding 12 in the inside of shell 1, insert rotor subassembly 17 in shell 1 and run through stator core 11, install flabellum 9 in the pivot of rotor subassembly 17 afterwards, install power output shaft 4 in the tip of rotor subassembly 17 pivot, install front bearing 6 in the inside of logical groove 5 subsequently, and install rotor protecgulum 2 on shell 1, make the one end of power output shaft 4 run through front bearing 6, again with the installation shell 1 of rotor back cover 3, and make the tip card of rotor subassembly 17 pivot establish the inside at back bearing 16, just so can avoid appearing the condition that the brushless motor bearing is relatively poor and lead to the wearing and tearing of part, thereby reach the purpose that improves bearing capacity, then energize stator winding 12, drive rotor subassembly 17 through electromagnetic induction and rotate, the pivot of rotor subassembly 17 drives flabellum 9 and rotates, flabellum 9 rotates and produces suction and takes away the heat that heat pipe 10 absorbed from stator core 11, and discharge through ventilative mouthful 7, just so can avoid the condition that the motor operating temperature is too high and lead to the shut down, thereby reach the purpose that improves the radiating effect.

It will be apparent to those skilled in the art that various changes and modifications may be made without departing from the spirit and scope of the invention. Thus, if such modifications and variations of the present invention fall within the scope of the claims and their equivalents, the present invention is also intended to include such modifications and variations.

Claims

1. An outer rotor brushless motor comprises a shell (1), and is characterized in that a rotor front cover (2) is fixedly mounted at one end of the shell (1), and a rotor rear cover (3) is fixedly mounted at one end, far away from the rotor front cover (2), of the shell (1);

the inside activity of shell (1) is equipped with stator core (11), the stator inslot of stator core (11) is equipped with stator winding (12), rotor subassembly (17) has been run through in the center part activity of stator core (11), the end fixing of rotor subassembly (17) pivot is equipped with power output shaft (4), logical groove (5) have been seted up to the one end of keeping away from shell (1) of rotor protecgulum (2), logical groove (5) are run through in the one end activity of power output shaft (4), the outside fixed cover of power output shaft (4) is equipped with fore bearing (6), the inside in logical groove (5) is established to the outside card of fore bearing (6).

2. The external rotor brushless motor according to claim 1, wherein a heat pipe (10) is fixedly arranged at one end of the stator core (11), the part of the heat pipe (10) close to the rotor front cover (2) is arc-shaped, and fan blades (9) are fixedly sleeved at the end of the rotating shaft of the rotor assembly (17).

3. The external rotor brushless motor according to claim 1, wherein a bearing seat (13) is fixedly disposed on a side of the rotor rear cover (3) away from the housing (1), a bearing groove (15) is formed on a side of the bearing seat (13) close to the rotor rear cover (3), a rear bearing (16) is fixedly clamped inside the bearing groove (15), and one end of the rotor assembly (17) away from the rotor front cover (2) movably penetrates through the rotor rear cover (3) and is fixedly clamped inside the rear bearing (16).

4. The external rotor brushless motor according to claim 1, wherein a plurality of front heat dissipation holes (8) are formed in one side of the rotor front cover (2) close to the housing (1) and distributed in an annular array, and a plurality of rear heat dissipation holes (14) are formed in one side of the rotor rear cover (3) close to the housing (1) and distributed in an annular array.

5. The external rotor brushless motor according to claim 1, wherein a plurality of ventilation openings (7) are formed in an annular array at one end of the outer side of the housing (1) close to the front rotor cover (2).

6. An external rotor brushless electric machine according to claim 2, wherein the fan blades (9) have a diameter smaller than the internal diameter of the housing (1).