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CN-224218230-U - Outer rotor brushless motor with radiating hole structure

CN224218230UCN 224218230 UCN224218230 UCN 224218230UCN-224218230-U

Abstract

The utility model discloses an outer rotor brushless motor with a radiating hole structure, which relates to the field of motor design, and comprises a stator and a rotor, wherein a copper wire winding is fixedly arranged on the stator, the rotor comprises a rotating cover and a rotating shaft, a permanent magnet ring is fixedly arranged on an inner ring of the rotating cover, a through hole is formed in the middle of the stator, the rotating shaft is fixedly arranged at the center of the end face of the rotating cover, the rotating shaft is rotatably arranged in the through hole in a matched manner, a plurality of air inlets are formed in the end face of the rotating cover, an outer convex edge is formed at one side edge of each air inlet, and a fan blade structure is formed between the outer convex edges of the plurality of air inlets.

Inventors

  • ZHAO QIANG
  • DING RONGMIN
  • LONG XINGBO

Assignees

  • 湖南国梦科技有限公司

Dates

Publication Date
20260508
Application Date
20250605

Claims (7)

  1. 1. The outer rotor brushless motor with the radiating hole structure comprises a stator and a rotor, wherein copper wire windings are fixedly arranged on the stator, and the outer rotor brushless motor is characterized in that: The rotor comprises a rotating cover and a rotating shaft, wherein a permanent magnet ring is fixedly arranged on an inner ring of the rotating cover, copper wire windings are installed in the permanent magnet ring in a clearance fit manner, a through hole is formed in the middle of the stator, the rotating shaft is fixedly arranged at the center position of the end face of the rotating cover, and the rotating shaft is installed in the through hole in a rotating fit manner; The end face of the rotating cover is provided with a plurality of air inlets in a forming mode, the plurality of air inlets are arranged in a mutually circular array mode, an outer convex edge is formed at one side edge of each air inlet, a fan blade structure is formed between the outer convex edges of the plurality of air inlets, and when the rotating cover rotates, the rotating cover is arranged through fan air input of the outer convex edge.
  2. 2. The external rotor brushless motor with the heat dissipation hole structure of claim 1, wherein the copper wire windings of the stator are matched with the magnetic field of the permanent magnet ring to drive the rotating cover and the rotating shaft to rotate when being electrified.
  3. 3. The external rotor brushless motor with the heat dissipation hole structure as set forth in any one of claims 1 and 2, wherein the stator comprises a positioning cylinder and a bottom plate, the bottom plate is of an annular structure and sleeved on the positioning cylinder, and the copper wire winding is fixedly sleeved on the positioning cylinder.
  4. 4. The outer rotor brushless motor with the heat dissipation hole structure of claim 3, wherein the through holes penetrate through the positioning cylinder, bearing mounting grooves are formed on inner sides of two ends of the through holes, rolling bearings are mounted in the bearing mounting grooves in a clearance fit mode, and the rotating shaft is mounted at inner rings of the two rolling bearings in an inserting mode.
  5. 5. The external rotor brushless motor with the radiating hole structure of claim 4, wherein the rotating shaft is provided with a limiting groove, a clamping spring is installed in the limiting groove in a clamping fit manner, and the clamping spring is arranged against the inner ring of the rolling bearing.
  6. 6. The external rotor brushless motor with the heat dissipation hole structure as recited in any one of claims 4 and 5, wherein a limiting block is formed at one end of the positioning cylinder, and the bottom plate abuts against the limiting block for installation.
  7. 7. The external rotor brushless motor with the radiating hole structure of claim 6, wherein the limiting block is provided with a first threaded hole in a molding mode, the base plate is provided with a second threaded hole in a molding mode, and the base plate is locked on the limiting block in a mode that screws penetrate through the first threaded hole and the second threaded hole.

Description

Outer rotor brushless motor with radiating hole structure Technical Field The utility model relates to the field of motor design, in particular to an outer rotor brushless motor with a radiating hole structure. Background Brushless motors refer to direct current motors without brushes and commutators that change the direction of current through an electronic control system to drive the motor in rotation. Brushless motors generally have higher efficiency, longer life, and less maintenance requirements than brushed motors. The brushless motor with high rotation speed generates larger heat when working for a long time, therefore, the prior art (bulletin number: CN214256059U, bulletin day: 2021.09.21) discloses a DC brushless motor, wherein a brushless motor driver is integrated into a motor body, and the brushless motor driver is connected with a motor through a wiring terminal between a PCB driving board and the motor, and is connected with a MOS tube in a contact way by combining a heat dissipation plate, so that the number of wires is reduced and the heat dissipation efficiency is improved. Among the above-mentioned scheme, dispel the heat to a plurality of fins of heating panel with heat transfer, belong to passive heat dissipation, its radiating effect is relatively poor, because brushless motor's inner structure does not have the structure that the water conservancy diversion was ventilated, still overheated easily at long-time during operation motor, leads to the motor to take place to damage. In the prior art, some brushless motors are provided with fan blades on a rotating shaft, and the fan blades are driven to rotate at a high speed to enable the air quantity to flow through the internal structure of the brushless motor to take away heat, but the arrangement of the fan blades not only increases the weight of the motor, but also reduces the stability of the motor, so that an external rotor brushless motor with a radiating hole structure is required to be designed to solve the technical problems. Disclosure of utility model The utility model provides a technical scheme capable of solving the problems in order to overcome the defects of the prior art. The outer rotor brushless motor with the radiating hole structure comprises a stator and a rotor, wherein copper wire windings are fixedly arranged on the stator, the rotor comprises a rotating cover and a rotating shaft, a permanent magnet ring is fixedly arranged on an inner ring of the rotating cover, the copper wire windings are installed in the permanent magnet ring in a clearance fit mode, a through hole is formed in the middle of the stator, the rotating shaft is fixedly arranged at the center position of the end face of the rotating cover, the rotating shaft is installed in the through hole in a rotating fit mode, a plurality of air inlets are formed in the end face of the rotating cover, the plurality of air inlets are arranged in a mutually circular array mode, an outer convex edge is formed at one side edge of each air inlet, a fan blade structure is formed between outer convex edges of the plurality of air inlets, and when the rotating cover rotates, fan air is input into the air inlets through the outer convex edges. And when the copper wire winding of the stator is electrified, the rotating cover and the rotating shaft are driven to rotate by matching with the magnetic field of the permanent magnet ring. The stator comprises a positioning cylinder and a bottom plate, wherein the bottom plate is of an annular structure and sleeved on the positioning cylinder, and the copper wire winding is sleeved on the positioning cylinder to be fixedly installed. The through hole penetrates through the positioning cylinder, bearing mounting grooves are formed in the inner sides of two ends of the through hole, rolling bearings are mounted in the bearing mounting grooves in a clearance fit mode, and the rotating shaft is mounted at the inner rings of the two rolling bearings in an inserting mode. And a limiting groove is formed in the rotating shaft, a clamping spring is installed in the limiting groove in a clamping fit manner, and the clamping spring is arranged against the inner ring of the rolling bearing. Further, a limiting block is formed at one end of the positioning cylinder, and the bottom plate abuts against the limiting block for installation. Further, a first threaded hole is formed in the limiting block, a second threaded hole is formed in the bottom plate, and the bottom plate is locked on the limiting block in a mode that screws penetrate through the first threaded hole and the second threaded hole. Compared with the prior art, the utility model has the beneficial effects that: 1. When the rotating cover of the rotor rotates at a high speed, the outer flange of the end face of the rotating cover can form a fan blade structure, so that outside air is fanned to enter the rotating cover from the air inlet, air circulation in the rotating cover