CN220754469U - Outer rotor brushless motor - Google Patents

Abstract

The utility model discloses an outer rotor brushless motor, which belongs to the technical field of motors and solves the problem that an insulating support in the existing outer rotor brushless motor is single in function. The utility model has the advantage of better heat dissipation.

Description

Outer rotor brushless motor

Technical Field

The utility model belongs to the technical field of motors, relates to a brushless motor, and in particular relates to an external rotor brushless motor.

Background

The outer rotor brushless motor has extensive application in each field, and current outer rotor brushless motor in market is most insulating support fixed in the one end of stator now, and as shown in the one kind of outer rotor brushless motor that publication number CN212258589U shows, as this patent figure 2 shows, and insulating lag is round platform form or coniform, insulating lag cover is located on the reference column and lie in the first end isolation of this stator core, because the insulating lag of this shape and placement mode, when wind when this position was passed through, insulating lag can not play the effect of wind-guiding, only can play insulating protection's effect to coil winding in specific use, the function is comparatively single.

Disclosure of Invention

The utility model aims to provide an external rotor brushless motor with an improved insulating bracket on the basis of the existing external rotor brushless motor with the insulating bracket.

The aim of the utility model can be achieved by the following technical scheme: the utility model provides an external rotor brushless motor, includes the stator and locates the peripheral external rotor subassembly of stator, the external rotor subassembly includes motor support, magnetic ring fixed cover, end cover and pivot, be provided with two fixed insulating supports of concatenation on the stator, there is round annular projection in the middle of the insulating support, the annular projection inboard of lower insulating support is equipped with the reference column, integrated into one piece has the cylindric pedestal on the motor support, stator and insulating support cover are located the pedestal and are fixed in the motor support on the mounting draw-in groove by the reference column of lower insulating support, the fixed cover of magnetic ring is located insulating support periphery and is connected in the end cover, each part is worn to locate in the pivot axial, the fan blade is connected in the pivot.

In the outer rotor brushless motor, the upper and lower insulating brackets are connected in a clamping connection structure.

In the outer rotor brushless motor, the magnetic ring fixing sleeve is not contacted with the motor bracket, so that a gap is reserved between the magnetic ring fixing sleeve and the motor bracket.

In the outer rotor brushless motor, the end cover is provided with a plurality of ventilation holes with two through sides.

In the outer rotor brushless motor, the motor support is integrally formed with a plurality of fixing plates and reinforcing ribs, and the fixing plates are provided with mounting clamping grooves matched with the positioning columns.

Compared with the prior art, the utility model has the following beneficial effects: the insulating support is spliced and fixed from two sides of the stator, not only has the insulating effects of isolating and protecting the coil winding and guaranteeing the stator assembly, but also has the effects of dredging the wind path and guiding wind to the preset direction, plays the role of reinforcing the wind guide, is provided with a through ventilation opening on the end cover, is provided with the fan blade, is beneficial to the wind energy to directly pass through the inside of the motor, and a gap is reserved between the magnetic ring fixing sleeve and the motor support, so that the heat dissipation effect of the motor is improved, the problem caused by overheating of the motor is reduced, and the service life of the motor is prolonged.

Drawings

Fig. 1 is an exploded view of an external rotor brushless motor;

FIG. 2 is an assembly view of an outer rotor brushless motor;

FIG. 3 is a detailed schematic of an insulating support for an outer rotor brushless motor;

fig. 4 is a detailed schematic diagram of a motor support of an external rotor brushless motor.

In the figure, 1, an upper insulating bracket; 11. an upper annular post; 12. an upper clamping groove; 2. a lower insulating support; 21. a lower annular post; 22. a lower clamping groove; 23. positioning columns; 3. a stator; 31. a coil winding; 4. a motor bracket; 41. a base; 42. a fixing piece; 43. an upper bearing; 44. a lower bearing; 45. reinforcing ribs; 46. installing a clamping groove; 5. a magnetic ring fixing sleeve; 6. a magnetic ring; 7. an end cap; 71. a vent hole 8 and a fan blade; 9. a rotating shaft.

Description of the embodiments

The following are specific embodiments of the present utility model and the technical solutions of the present utility model will be further described with reference to the accompanying drawings, but the present utility model is not limited to these embodiments.

As shown in fig. 1 to 3, the embodiment includes a stator 3 and an outer rotor assembly disposed at the periphery of the stator 3, the outer rotor assembly includes a motor support 4, a magnetic ring fixing sleeve 5, an end cover 7 and a rotating shaft 9, the stator 3 is formed by arranging a plurality of iron cores in a circular array, two spliced and fixed insulation supports are disposed on the stator 3, the insulation supports are divided into an upper insulation support 1 and a lower insulation support 2, the upper insulation support 1 and the lower insulation support 2 are connected together in a clamping connection manner, a ring-shaped protruding column 11 and a lower ring-shaped protruding column 21 are disposed between the upper insulation support 1 and the lower insulation support 2, a positioning column 23 matched with a mounting clamping groove on the motor support 4 is disposed at the inner side of the lower ring-shaped protruding column 21 of the lower insulation support 2, a cylindrical seat 41 is integrally formed on the motor support 4, the stator 3 is sleeved on the seat 41, the annular protruding column 21 of the lower insulation support 2 outside the stator 3 is fixed in a mounting clamping groove 46 on the motor support 4, the fixing sleeve 5 is mounted at the periphery of the upper insulation support 1 and the lower insulation support 2 and is connected to the lower ring-shaped protruding column 21, the inner wall of the magnetic ring 5 is fixed on the end cover 7, and the inner wall of the magnetic ring 5 is fixed on the rotating shaft 9.

As shown in fig. 4, the motor bracket 4 is integrally formed with a plurality of fixing pieces 42 and reinforcing ribs 45, and the fixing pieces 42 are formed with mounting slots 46 which are matched with the positioning posts 23.

Further, the insulating support is formed by splicing the upper clamping groove 11 of the upper insulating support 1 and the lower clamping groove 21 of the lower insulating support through a positioning groove penetrating through the stator 3, and the connection mode is clamping connection.

Further, the end cover 7 is provided with a plurality of ventilation holes 71 with two through sides, and the fan blade 8 is connected to the rotating shaft 9 and is positioned at the top of the end cover 7.

Further, the magnetic ring fixing sleeve 5 is connected to the end cover 7, and is not connected to the motor bracket 4, so that a gap is reserved between the magnetic ring fixing sleeve and the motor bracket, and a structure with ventilation on two sides is formed inside the motor.

When the embodiment is used, the motor is electrified to enable the coil winding 31 and the magnetic ring 6 to generate a magnetic field to drive the outer rotor assembly to rotate, the rotating shaft 9 drives the fan blades 8 to rotate, wind generated by the fan blades 8 enters the interior of the motor through the ventilation holes 71 on the end cover 7, and the upper insulating support 1 and the lower insulating support 2 play a role in guiding wind, so that the wind energy directly passes through the interior of the motor; a gap is reserved between the magnetic ring fixing sleeve 5 and the motor bracket 4, so that wind energy brought by the fan blade 8 at the top of the motor is conveniently discharged, an effective cooling effect is achieved, the problem caused by overheating of the motor is reduced, and the service life of the motor is prolonged.

The specific embodiments described herein are offered by way of example only to illustrate the spirit of the utility model. Those skilled in the art may make various modifications or additions to the described embodiments or substitutions thereof without departing from the spirit of the utility model or exceeding the scope of the utility model as defined in the accompanying claims.

Although various terms are used more herein, the use of other terms is not precluded. These terms are used merely for convenience in describing and explaining the nature of the utility model; they are to be interpreted as any additional limitation that is not inconsistent with the spirit of the present utility model.

Claims (5)

1. The utility model provides an external rotor brushless motor, includes stator (3) and locates the peripheral external rotor subassembly of stator (3), the external rotor subassembly includes motor support (4), magnetic ring fixed sleeve (5), end cover (7) and pivot (9), stator (3) are circular array by a plurality of iron core and arrange and constitute, be provided with two fixed insulating supports of concatenation on stator (3), insulating support divide into insulating support (1) and insulating support down (2), insulating support (1) and insulating support down (2) have annular projection (11) and annular projection (21) on the ring respectively in the centre of oneself, annular projection (21) inboard is equipped with reference column (23) down on insulating support (2), integrated into one piece has tubular pedestal (41) on motor support (4), stator (3) cover is located the pedestal to in mounting groove (46) on motor support (4) through insulating support down's reference column (23), fixed sleeve (5) are located insulating support (1) and insulating support down (2) and are connected in pivot (9) are located respectively to the periphery, and the pivot (9) are fixed in the pivot.

2. An external rotor brushless motor according to claim 1, wherein: the upper insulating support (1) and the lower insulating support (2) are connected in a clamping connection structure.

3. An external rotor brushless motor according to claim 1, wherein: the magnetic ring fixing sleeve (5) is not contacted with the motor bracket (4) so as to leave a gap.

4. An external rotor brushless motor according to claim 1, wherein: the end cover (7) is provided with a plurality of vent holes (71) with two through sides.

5. An external rotor brushless motor according to claim 1, wherein: a plurality of fixing plates (42) and reinforcing ribs (45) are integrally formed on the motor support (4), and mounting clamping grooves (46) matched with the positioning columns (23) are formed in the fixing plates (42).