CN220358968U

CN220358968U - Efficient brushless motor

Info

Publication number: CN220358968U
Application number: CN202321644539.1U
Authority: CN
Inventors: 孙军; 赵世伟; 张桑杰; 江为旺
Original assignee: Jiaxing Xiaoxiang Medical Instrument Technology Co ltd
Current assignee: Jiaxing Xiaoxiang Medical Instrument Technology Co ltd
Priority date: 2023-06-26
Filing date: 2023-06-26
Publication date: 2024-01-16
Anticipated expiration: 2033-06-26

Abstract

The utility model discloses a high-efficiency brushless motor, which relates to the technical field of brushless motors and aims at solving the technical problems that the brushless motor does not have a heat radiation function in the prior art and the working efficiency of the brushless motor can be reduced due to overhigh temperature; wherein, swing joint has interior stator core in the shell body of heat dissipation, and output shaft is installed to interior stator core left end, and this brushless motor utilizes radiator fan's design, dispels the heat to the inside heat dissipation shell body when the work, avoids the interior high temperature of heat dissipation shell body to influence brushless motor's normal operating to effectively guarantee that brushless motor can last efficient work, shelter from waterproof ventilative net when not working, guarantee waterproof ventilative net's completion.

Description

Efficient brushless motor

Technical Field

The utility model belongs to the technical field of brushless motors, and particularly relates to a high-efficiency brushless motor.

Background

The brushless motor has no electric spark generated during operation of the brush motor because the brush is removed, so that the interference of the electric spark to remote control radio equipment is greatly reduced, and the brushless motor has the advantages of low noise, smooth operation and the like, and is gradually widely used.

At present, the utility model patent with the patent number of CN201921048884.2 discloses a high-efficiency brushless motor, which comprises a motor shell, a front end cover, a rear bracket, a stator assembly and a rotor assembly, wherein the front end cover and the rear end cover are respectively arranged at two ends of the motor shell, the rear bracket is arranged in the middle of the motor shell, the stator assembly is sleeved outside the rotor assembly, the stator assembly and the rotor assembly are arranged between the front end cover and the rear bracket, a circuit board is arranged between the rear end cover and the rear bracket, the stator assembly comprises a 6-slot stator chip, an upper insulating slot cover and a lower insulating slot cover which are respectively sleeved at the upper side and the lower side of the stator chip, the rotor assembly comprises a rotating shaft, a rotor core sleeved on the rotating shaft and a rotor magnetic ring sleeved on the rotor core, the outer diameter of the rotor core is 42mm, the inner diameter of the rotor magnetic ring is 42mm, the outer diameter of the rotor magnetic ring is 49mm, the inner diameter of the stator core is 51mm, the thicknesses of the rotor core, the rotor magnetic ring and the stator core are all 30mm, stator windings on the stator core adopt a star connection mode and adopt enameled wires with the thickness of 0.37mm, the slot filling rate of the stator core is 70% -80%, the rotor magnetic ring adopts bonded NdFeB magnetic rings with 4 pole inner diameters magnetized, the slot number of a motor and the pole number of the rotor magnetic rings are smaller, the production and the processing can be facilitated, the cost cannot be too high, but the brushless motor does not have a heat dissipation function, the normal operation of the brushless motor can be influenced by the too high temperature in the use process, and the working efficiency of the brushless motor can be reduced.

Therefore, in order to solve the above problems of not having the heat dissipation function and affecting the working efficiency, a solution is needed to improve the usage scenario of the brushless motor.

Disclosure of Invention

(1) Technical problem to be solved

The utility model aims to overcome the defects of the prior art and provide a high-efficiency brushless motor, which aims to solve the technical problems that the prior art does not have a heat dissipation function and the working efficiency of the brushless motor is reduced due to overhigh temperature.

(2) Technical proposal

In order to solve the technical problems, the utility model provides a high-efficiency brushless motor, which comprises a heat dissipation outer shell, detachable end covers and heat dissipation cavities which are respectively arranged at the left end and the right end of the heat dissipation outer shell, an outer rotor magnetic yoke fixedly connected to the inner side of the heat dissipation outer shell, and permanent magnets which are fixedly connected to the inner side of the outer rotor magnetic yoke and are distributed symmetrically up and down; the heat dissipation device comprises a heat dissipation cavity, an inner stator iron core, an output shaft, a coil, heat dissipation grooves, a waterproof ventilation net, a heat dissipation fan and a baffle cover, wherein the inner stator iron core is movably connected in the heat dissipation cavity, the output shaft is arranged at the left end of the inner stator iron core, the coil is wound on the outer side of the inner stator iron core, the heat dissipation grooves which are communicated with each other in the front-back direction are formed in the front-back direction of the heat dissipation cavity, the slide grooves which are symmetrically distributed in the left-right direction of the heat dissipation grooves are formed in the front-back direction of the heat dissipation cavity, the waterproof ventilation net is arranged in the heat dissipation groove, and the heat dissipation fan is arranged in the heat dissipation cavity.

When the brushless motor of the technical scheme is used, the output shaft penetrates out of the end cover, the end cover is fixed at the left end of the radiating outer shell, the output shaft is connected with a load, the sliding baffle cover exposes the radiating groove, the radiating fan in the radiating cavity is started to radiate heat in the radiating outer shell, hot air is discharged from the waterproof ventilation net in the radiating groove, after the coil is electrified, a magnetic field is formed according to the alternating frequency and the waveform of current waves on the coil, and the output shaft drives the load to operate under the action of the permanent magnet and the inner stator iron core in the outer rotor magnetic yoke.

Further, keep off inboard fixedly connected with bilateral symmetry's of lid first magnet, sliding tray internal fixation have with the second magnet that first magnet magnetism is connected, keep off the area of lid and be greater than the area of heat dissipation groove, protect the heat dissipation groove through keeping off the lid, prevent that the heat dissipation groove from being damaged.

Further, the limiting ring is fixedly connected in the radiating cavity, the detachable hollow protection plate is installed at the left end of the limiting ring, and the radiating effect can be achieved by guaranteeing the wind blown out by the radiating fan through the hollow protection plate.

Further, a bearing is arranged in the end cover, the output shaft is arranged in the bearing, and the end cover, the permanent magnet, the output shaft and the bearing are of concentric circle structures, so that the movement track of the bearing is not limited.

Further, 2 permanent magnets are arranged, the polarities of the permanent magnets are opposite, and the output shaft is rotated through the permanent magnets with different polarities.

Further, the annular bolts which are distributed at equal intervals are arranged between the heat dissipation outer shell and the end cover, and the right end of the heat dissipation cavity is provided with the air inlet hole, so that the air can be sent into the heat dissipation outer shell from outside, and the heat dissipation effect is achieved.

Further, the lower end of the heat dissipation outer shell is fixedly connected with bases which are symmetrically distributed in the front-back direction, and the bases are provided with mounting holes, so that the heat dissipation outer shell can be conveniently mounted.

(3) Advantageous effects

Compared with the prior art, the utility model has the beneficial effects that: according to the brushless motor, the design of the cooling fan is utilized, the inside of the cooling outer shell is cooled while the brushless motor works, the phenomenon that the normal operation of the brushless motor is influenced due to the fact that the temperature in the cooling outer shell is too high is avoided, so that the brushless motor can work continuously and efficiently is effectively guaranteed, the working efficiency of the brushless motor is greatly improved, the blocking cover is in a slidable design, the waterproof ventilation net is blocked when the brushless motor does not work, and the integrity of the waterproof ventilation net is guaranteed.

Drawings

FIG. 1 is a schematic diagram of a split structure of a brushless motor according to an embodiment of the utility model;

FIG. 2 is a schematic perspective view of a brushless motor according to an embodiment of the utility model;

fig. 3 is an enlarged schematic view of a structure of a brushless motor according to an embodiment of the utility model at a in fig. 1.

The marks in the drawings are: 1. a heat dissipation outer case; 2. an end cap; 3. a heat dissipation cavity; 4. an outer rotor yoke; 5. a permanent magnet; 6. an inner stator core; 7. an output shaft; 8. a coil; 9. a heat sink; 10. a sliding groove; 11. a waterproof breathable net; 12. a heat radiation fan; 13. a blocking cover; 14. a first magnet; 15. a second magnet; 16. a limiting ring; 17. hollow protection plates; 18. a bearing; 19. a bolt; 20. a base; 21. a mounting hole; 22. and an air inlet hole.

Detailed Description

The split structure of the high-efficiency brushless motor is shown in fig. 1, the perspective structure of the high-efficiency brushless motor is shown in fig. 2, and the brushless motor comprises a heat dissipation outer shell 1, end covers 2 and a heat dissipation cavity 3 which are respectively arranged at the left end and the right end of the heat dissipation outer shell 1 and are detachable, an outer rotor magnetic yoke 4 fixedly connected to the inner side of the heat dissipation outer shell 1, and permanent magnets 5 fixedly connected to the inner side of the outer rotor magnetic yoke 4 and distributed vertically symmetrically; the heat dissipation shell body 1 is internally and movably connected with an inner stator iron core 6, the left end of the inner stator iron core 6 is provided with an output shaft 7, the outer side of the inner stator iron core 6 is wound with a coil 8, the front end and the rear end of a heat dissipation cavity 3 are respectively provided with a heat dissipation groove 9 which is communicated with each other, the front end and the rear end of the heat dissipation cavity 3 are respectively provided with a sliding groove 10 which is distributed in a bilateral symmetry manner relative to the heat dissipation grooves 9, the heat dissipation grooves 9 are internally provided with a waterproof ventilation net 11, the heat dissipation cavity 3 is internally provided with a heat dissipation fan 12, and the outer side of the heat dissipation cavity 3 is slidably connected with a baffle cover 13.

The inner side of the shielding cover 13 is fixedly connected with first magnets 14 which are distributed symmetrically left and right, the sliding groove 10 is internally fixedly connected with second magnets 15 which are magnetically connected with the first magnets 14, and the area of the shielding cover 13 is larger than that of the heat dissipation groove 9.

Meanwhile, a limiting ring 16 is fixedly connected in the heat dissipation cavity 3, a detachable hollowed-out protection plate 17 is arranged at the left end of the limiting ring 16, a bearing 18 is arranged in the end cover 2, the output shaft 7 is arranged in the bearing 18, and the end cover 2, the permanent magnet 5, the output shaft 7 and the bearing 18 are of a concentric circle structure.

In addition, 2 permanent magnets 5 are arranged, the polarities of the permanent magnets 5 are opposite, annular bolts 19 distributed at equal intervals are arranged between the heat dissipation outer shell 1 and the end cover 2, and an air inlet hole 22 is formed in the right end of the heat dissipation cavity 3.

In addition, the lower end of the heat dissipation shell body 1 is fixedly connected with a base 20 which is symmetrically distributed in the front-back direction, and the base 20 is provided with a mounting hole 21.

An enlarged schematic view of the brushless motor at a in fig. 1 is shown in fig. 3.

When the brushless motor of the technical scheme is used, the output shaft 7 penetrates out of the end cover 2, the end cover 2 is fixed at the left end of the heat dissipation outer shell body 1, the output shaft 7 is connected with a load, the heat dissipation outer shell body 1 is fixed through the mounting hole 21 on the base 20, the baffle cover 13 slides in the sliding groove 10, the first magnet 14 slides in the sliding groove under the action of the second magnet 15, the baffle cover 13 hovers at any position to expose the heat dissipation groove 9, the heat dissipation fan 12 in the heat dissipation cavity 3 is started to dissipate heat in the heat dissipation outer shell body 1, hot air is discharged from the waterproof ventilation net 11 in the heat dissipation groove 9, after the coil 8 is electrified, a magnetic field is formed according to the alternating frequency and the waveform of current waves on the coil 8, and the output shaft 7 drives the load to operate under the action of the permanent magnet 5 and the inner stator iron core 6 in the outer rotor yoke 4.

Claims

1. The high-efficiency brushless motor comprises a heat dissipation outer shell, end covers and a heat dissipation cavity which are respectively arranged at the left end and the right end of the heat dissipation outer shell and are detachable, an outer rotor magnetic yoke fixedly connected to the inner side of the heat dissipation outer shell, and permanent magnets fixedly connected to the inner side of the outer rotor magnetic yoke and symmetrically distributed up and down; the heat dissipation device is characterized in that an inner stator iron core is movably connected in the heat dissipation shell, an output shaft is arranged at the left end of the inner stator iron core, a coil is wound on the outer side of the inner stator iron core, heat dissipation grooves which are communicated in the front and back directions are formed in the front and back ends of a heat dissipation cavity, sliding grooves which are symmetrically distributed in the left and right directions of the heat dissipation grooves are formed in the front and back ends of the heat dissipation cavity, a waterproof and breathable net is arranged in the heat dissipation groove, and a heat dissipation fan is arranged in the heat dissipation cavity, and a blocking cover is slidably connected on the outer side of the heat dissipation cavity.

2. The efficient brushless motor of claim 1, wherein first magnets distributed symmetrically are fixedly connected to the inner side of the blocking cover, second magnets magnetically connected to the first magnets are fixedly connected to the sliding groove, and the area of the blocking cover is larger than that of the heat dissipation groove.

3. The efficient brushless motor as claimed in claim 1, wherein a limiting ring is fixedly connected in the heat dissipation cavity, and a detachable hollow protection plate is installed at the left end of the limiting ring.

4. The efficient brushless motor of claim 1, wherein the bearing is mounted in the end cover, the output shaft is mounted in the bearing, and the end cover, the permanent magnet, the output shaft and the bearing are in a concentric circle structure.

5. A high efficiency brushless motor according to claim 1, wherein said permanent magnets are provided in number of 2 and the polarities of the permanent magnets are opposite.

6. The efficient brushless motor of claim 1, wherein annular bolts distributed at equal intervals are installed between the heat dissipation outer shell and the end cover, and an air inlet hole is formed in the right end of the heat dissipation cavity.

7. The efficient brushless motor as claimed in claim 1, wherein the lower end of the heat dissipation casing is fixedly connected with bases which are symmetrically distributed in front-back direction, and the bases are provided with mounting holes.