CN219535817U

CN219535817U - DC brushless motor

Info

Publication number: CN219535817U
Application number: CN202320551026.XU
Authority: CN
Inventors: 吴兴琼
Original assignee: Ningbo Zhongzhan Intelligent Technology Co ltd
Current assignee: Ningbo Zhongzhan Intelligent Technology Co ltd
Priority date: 2023-03-17
Filing date: 2023-03-17
Publication date: 2023-08-15
Anticipated expiration: 2033-03-17

Abstract

The utility model discloses a direct current brushless motor, and relates to the technical field of motors; the motor comprises a stator winding and an outer rotor, wherein a permanent magnet part is sleeved outside the stator winding, one end of the permanent magnet part is fixedly connected with the outer rotor, the outer rotor and a rotating shaft movably penetrating through the stator winding are integrally formed, and a fan blade is fixedly arranged at one end of the outer rotor, which is close to the stator winding. According to the direct current brushless motor provided by the utility model, the outer rotor fan blades are added, so that the air flow in the motor body can be accelerated, the heat dissipation is accelerated, the heat dissipation effect is good, the working temperature of the motor body can be effectively controlled, and the failure rate is greatly reduced.

Description

DC brushless motor

Technical Field

The utility model relates to the technical field of motors, in particular to a direct current brushless motor.

Background

The brushless DC motor is composed of a motor main body and a driver, and is a typical electromechanical integrated product. Brushless motors refer to motors without brushes and commutators (or slip rings), also known as commutators-less motors. The brushless dc motor has the same operating principle and application characteristics as a general dc motor, but its composition is different. The motor is provided with a reversing circuit in addition to the motor, and the motor and the reversing circuit are closely combined together. Many low-power motors are integrated with the commutation circuit itself, and the dc brushless motor is identical to the dc motor in appearance.

The existing brushless direct current motor has the following defects: the heat dissipation is generally to open a heat dissipation hole on the shell, or the box body of the controller adopts an aluminum casting to accelerate the heat dissipation of the power electronic device. But this heat dissipation is far from meeting the practical operating requirements of the motor: 1) The shell is provided with the radiating holes, dust and rainwater are easy to enter, so that the motor is in fault, the radiating effect is also not ideal, the working temperature is higher, and the motor is not beneficial to running; 2) The controller is generally sealed, and the power electronic device is contacted by the box body of the aluminum casting to dissipate heat, so that the heat dissipation effect is also not ideal, and the temperature is often too high, and faults occur.

Disclosure of Invention

The utility model aims to provide a direct current brushless motor, which solves the problems in the prior art, is provided with the outer rotor fan blades, can accelerate the air flow in the motor body, quickens the heat dissipation, has good heat dissipation effect, can effectively control the working temperature of the motor body, and greatly reduces the failure rate.

In order to achieve the above object, the present utility model provides the following solutions:

the utility model provides a direct current brushless motor, which comprises a stator winding and an outer rotor, wherein a permanent magnet part is sleeved outside the stator winding, one end of the permanent magnet part is fixedly connected with the outer rotor, the outer rotor and a rotating shaft movably penetrating through the stator winding are integrally formed, and one end of the outer rotor, which is close to the stator winding, is fixedly provided with a fan blade.

Optionally, the permanent magnet part includes a magnetic ring fixedly connected with the outer rotor.

Optionally, the outer rotor includes a sleeve portion, a circular plate portion is integrally formed at one end of the sleeve portion, which is far away from the stator winding, a plurality of fan blades are annularly arranged at the outer side of the sleeve portion, and one end of each fan blade is integrally formed with the circular plate portion; the magnetic ring is fixedly arranged in the sleeve part, and the magnetic ring is fixedly sleeved in the magnetic ring.

Optionally, the motor further comprises a supporting base, the stator winding is fixedly connected with one end of the supporting base, and one end of the rotating shaft penetrates through the supporting base.

Optionally, the stator winding includes stator core, has seted up a plurality of heat dissipation through-holes on the stator core, and the air flow of being convenient for, stator core both ends are fixedly connected with front bezel and back line frame respectively, be equipped with multiunit coil between front bezel and the back line frame, the coil is located the stator core outside.

Optionally, a pin is fixedly arranged at one end of the back wire frame, which is far away from the stator core, and the pin is made of conductive materials; the contact pin is fixedly connected with a driving circuit board, and a Hall element is arranged on the driving circuit board.

Optionally, the oil-retaining bearing is fixedly worn on the support base, and one end of the rotating shaft sequentially passes through the front wire frame, the stator core, the rear wire frame and the driving circuit board and then is rotationally connected with the oil-retaining bearing.

Optionally, a graphite washer and a positioning collar are fixedly sleeved on the rotating shaft, and the graphite washer and the positioning collar are respectively positioned at two ends of the oil-retaining bearing.

Compared with the prior art, the utility model has the following technical effects:

according to the utility model, the fan blade structure is added at the outer rotor, so that the air flow of the motor body and the driving circuit board is quickened, the heat dissipation effect is good, the working temperature in the motor body can be effectively controlled, and the failure rate is greatly reduced; the end face of the stator core is provided with a heat dissipation through hole which has a certain air diversion function; the fan blade and the outer rotor are integrally formed, and the structure is simple and reasonable.

Drawings

In order to more clearly illustrate the embodiments of the present utility model or the technical solutions in the prior art, the drawings that are needed in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present utility model, and other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.

FIG. 1 is an exploded view of a DC brushless motor according to the present utility model;

reference numerals illustrate: the magnetic-conductive type magnetic-conductive fan comprises a 1-outer rotor, a 2-rotating shaft, a 3-magnetic-conductive ring, a 4-magnetic ring, a 5-graphite gasket, a 6-front coil frame, a 7-coil, an 8-stator core, a 9-rear coil frame, 10-contact pins, 11-driving circuit boards, 12-oil-containing bearings, 13-supporting bases, 14-positioning clamping rings and 15-fan blades.

Detailed Description

The following description of the embodiments of the present utility model will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present utility model, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.

In order that the above-recited objects, features and advantages of the present utility model will become more readily apparent, a more particular description of the utility model will be rendered by reference to the appended drawings and appended detailed description.

Referring to fig. 1, the utility model provides a brushless direct current motor, which comprises a stator winding, a supporting base 13 and an outer rotor 1, wherein a permanent magnet part is sleeved outside the stator winding, one end of the permanent magnet part is fixedly connected with the outer rotor 1, the outer rotor 1 and a rotating shaft 2 movably penetrating through the stator winding are integrally formed, the outer rotor 1 is positioned at one end of the rotating shaft 2, the stator winding is fixedly connected with one end of the supporting base 13, one end of the rotating shaft 2 penetrates through the supporting base 13, and one end, close to the stator winding, of the outer rotor 1 is fixedly provided with a fan blade 15.

Specifically, the outer rotor 1 includes a sleeve portion, one end of the sleeve portion, which is far away from the stator winding, is integrally formed with a circular plate portion, a plurality of fan blades 15 are annularly arranged outside the sleeve portion, and one end of each fan blade 15 is integrally formed with the circular plate portion; the permanent magnet part comprises a magnetic ring 4, a magnetic conduction ring 3 is fixedly arranged in the sleeve part, and the magnetic ring 4 is fixedly sleeved in the magnetic conduction ring 3.

Further preferably, the stator winding comprises a stator core 8, two ends of the stator core 8 are fixedly connected with a front coil frame 6 and a rear coil frame 9 respectively, a plurality of groups of coils 7 are arranged between the front coil frame 6 and the rear coil frame 9, and the coils 7 are positioned outside the stator core 8. The end of the back wire frame 9 far away from the stator core 8 is fixedly provided with a contact pin 10, and the contact pin 10 is made of conductive materials, such as brass; the contact pin 10 is fixedly connected with a driving circuit board 11, and a Hall element is arranged on the driving circuit board 11 and used for detecting the magnetic field position of the rotor, so that the stator coil is driven to be switched on and off, a rotating magnetic field is formed, and the outer rotor 1 and the fan blades 15 rotate at a high speed.

An oil-containing bearing 12 is fixedly arranged on the supporting base 13 in a penetrating manner, and one end of the rotating shaft 2 sequentially penetrates through the front wire frame 6, the stator iron core 8, the rear wire frame 9 and the driving circuit board 11 and then is rotationally connected with the oil-containing bearing 12. The rotating shaft 2 is fixedly sleeved with a graphite gasket 5 and a positioning clamping ring 14, the graphite gasket 5 and the positioning clamping ring 14 are respectively positioned at two ends of the oil-retaining bearing 12, and the positioning clamping ring 14 is matched and fixed with a clamping groove of the rotating shaft 2, so that a certain gap is kept between the rotor and the shaft in the axial direction.

When the motor works, the outer rotor 1 and the rotating shaft 2 rotate at a high speed, the fan blades 15 arranged at one end of the outer rotor 1 close to the stator winding rotate rapidly along with the outer rotor 1 and then start to work, the fan blades 15 rotate, cold air blows to the stator winding and the permanent magnet part along the outer surface of the shell, and heat is quickly taken away through the high-speed flow of the cold air in the shell, so that the motor works in a proper temperature range, faults caused by overhigh temperature are reduced, the fan blades and the outer rotor are integrally formed, the structure is simple, and the reliability is improved.

In the description of the present utility model, it should be noted that the directions or positional relationships indicated by the terms "center", "top", "bottom", "left", "right", "vertical", "horizontal", "inner", "outer", etc. are based on the directions or positional relationships shown in the drawings, are merely for convenience of describing the present utility model and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present utility model. Furthermore, the terms "first," "second," and the like are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

The principles and embodiments of the present utility model have been described in detail with reference to specific examples, which are provided to facilitate understanding of the method and core ideas of the present utility model; also, it is within the scope of the present utility model to be modified by those of ordinary skill in the art in light of the present teachings. In view of the foregoing, this description should not be construed as limiting the utility model.

Claims

1. A brushless dc motor, characterized in that: the motor comprises a stator winding and an outer rotor, wherein a permanent magnet part is sleeved outside the stator winding, one end of the permanent magnet part is fixedly connected with the outer rotor, the outer rotor and a rotating shaft movably penetrating through the stator winding are integrally formed, and a fan blade is fixedly arranged at one end of the outer rotor, which is close to the stator winding.

2. A brushless dc motor as claimed in claim 1, wherein: the permanent magnet part comprises a magnetic ring fixedly connected with the outer rotor.

3. A brushless dc motor as claimed in claim 2, wherein: the outer rotor comprises a sleeve part, a circular plate part is integrally formed at one end of the sleeve part, which is far away from the stator winding, a plurality of fan blades are arranged on the outer side of the sleeve part in a surrounding mode, and one end of each fan blade is integrally formed with the circular plate part; the magnetic ring is fixedly arranged in the sleeve part, and the magnetic ring is fixedly sleeved in the magnetic ring.

4. A brushless dc motor as claimed in claim 1, wherein: the stator winding is fixedly connected with one end of the supporting base, and one end of the rotating shaft penetrates through the supporting base.

5. A brushless dc motor as claimed in claim 4, wherein: the stator winding comprises a stator core, a front wire frame and a rear wire frame are fixedly connected to two ends of the stator core respectively, a plurality of groups of coils are arranged between the front wire frame and the rear wire frame, and the coils are located on the outer side of the stator core.

6. A brushless dc motor as claimed in claim 5, wherein: the end, far away from the stator core, of the rear wire frame is fixedly provided with a contact pin, and the contact pin is made of conductive materials; the contact pin is fixedly connected with a driving circuit board, and a Hall element is arranged on the driving circuit board.

7. A brushless dc motor as claimed in claim 6, wherein: the oil-retaining bearing is fixedly arranged on the supporting base in a penetrating mode, and one end of the rotating shaft sequentially penetrates through the front wire frame, the stator iron core, the rear wire frame and the driving circuit board and then is connected with the oil-retaining bearing in a rotating mode.

8. A brushless dc motor as claimed in claim 7, wherein: the graphite gasket and the positioning clamping ring are fixedly sleeved on the rotating shaft, and are respectively positioned at two ends of the oil-retaining bearing.