CN215601128U

CN215601128U - External rotor direct current brushless motor with high load intensity

Info

Publication number: CN215601128U
Application number: CN202121999470.5U
Authority: CN
Inventors: 谢伟
Original assignee: Shenzhen Dingyufeng Technology Co ltd
Current assignee: Shenzhen Dingyufeng Technology Co ltd
Priority date: 2021-08-24
Filing date: 2021-08-24
Publication date: 2022-01-21
Anticipated expiration: 2031-08-24

Abstract

The utility model discloses an external rotor brushless DC motor with high load strength, which comprises an upper end cover, wherein one side of the upper end cover is sequentially connected with an external rotor shell and a lower end cover, a bearing is arranged in the external rotor shell, the center of the lower end cover is penetrated and provided with an outlet hole, one end of the lower end cover is provided with an integrated circuit board, two ends of the outer wall of the external rotor shell are provided with a plurality of heat dissipation holes, the inner wall of the external rotor shell is uniformly distributed with a plurality of permanent magnet magnetic poles, the upper side and the lower side of the inner wall of one end of the external rotor shell are fixedly connected with a roller bearing I, rollers can directly roll on the side wall of the bearing through the roller bearing I on the upper side and the lower side of the bearing, thereby achieving the purpose of bearing heavier load and impact load, the roller bearing I is a sealing structure, provides long-term effective lubrication through filling of lubricating grease, and reduces abrasion of parts during movement, therefore, the purposes of ensuring the motor precision and reducing the energy consumption are achieved.

Description

External rotor direct current brushless motor with high load intensity

Technical Field

The utility model relates to the field of motors, in particular to an outer rotor direct current brushless motor with high load strength.

Background

The brushless direct current motor is a typical electromechanical integration product, and because the brushless direct current motor runs in an automatic control mode, a starting winding is not additionally arranged on a rotor like a synchronous motor which is started under heavy load under variable frequency speed regulation, oscillation and step loss can not be generated when load suddenly changes, and a permanent magnet of the brushless direct current motor with medium and small capacity is mainly made of rare earth neodymium iron boron (Nd-Fe-B) materials with high magnetic energy level at present.

In the existing outer rotor brushless direct current motor, after an inner bearing reaches a certain rotating speed, the temperature inside a machine shell is too high, a wire short circuit is extremely easy to cause, and when the bearing is always kept at a rotating speed, the inner load is increased, the service life of the motor is greatly reduced, and the outer rotor brushless direct current motor with high load strength is provided for the purpose.

SUMMERY OF THE UTILITY MODEL

The present invention is directed to an external rotor brushless dc motor with high load strength, so as to solve the problems mentioned in the background art.

In order to achieve the purpose, the utility model provides the following technical scheme: an outer rotor brushless DC motor with high load strength comprises an upper end cover, wherein one side of the upper end cover is sequentially connected with an outer rotor casing and a lower end cover, and a bearing is arranged inside the upper end cover, an outlet hole is arranged at the center of the lower end cover in a penetrating way, an integrated circuit board is arranged at one end of the lower end cover, a plurality of heat dissipation holes are arranged at two ends of the outer wall of the outer rotor casing, a plurality of permanent magnet magnetic poles are uniformly distributed on the inner wall of the outer rotor casing, the upper side and the lower side of the inner wall of one end of the outer rotor casing are fixedly connected with a roller bearing I, an inner stator iron core is sleeved in the outer rotor casing, the outer side of the inner stator iron core is uniformly and fixedly connected with an excitation winding, the center of the inner stator iron core is provided with a round hole, two ends of the inner stator iron core are provided with grooves, and the upper end and the lower end of the inside of the groove are provided with wire connecting holes, and a circuit penetrating wire on the excitation winding is electrically connected with the integrated circuit board.

Preferably, an inlet groove is formed in the center of the upper end cover, and a first roller bearing is fixedly connected to the center inside one end of the upper end cover.

Preferably, a rotating shaft base is arranged at one end of the bearing, a plurality of positioning holes are formed in the surface of the rotating shaft base, a rotor assembly is arranged in the middle of the bearing, a connecting end is fixedly connected to the other end of the bearing, and a clamping groove is formed in one end of the connecting end.

Preferably, the diameter of the rotor assembly is larger than that of the bearing, the diameter of the rotor assembly is consistent with that of the inlet slot and the outlet slot, and the rotor assembly corresponds to a round hole formed in the center of the inner stator iron core.

Preferably, the inner sides of the first roller bearings are rotatably connected with the bearings.

Preferably, the inner part of the outer rotor casing is hollow, and two ends of the outer rotor casing are provided with hole grooves, and the hole grooves correspond to one ends of the upper end cover and the lower end cover.

Compared with the prior art, the utility model has the beneficial effects that:

1. the utility model relates to an outer rotor direct current brushless motor with high load strength, which can lead a roller to directly roll on the side wall of a bearing through a roller bearing I on the upper side and the lower side of the bearing, thereby achieving the purpose of bearing heavier load and impact load.

2. According to the external rotor brushless direct current motor with high load strength, the heat generated by internal rotation is discharged from the heat dissipation holes through the heat dissipation holes in the external rotor shell when the motor runs, so that the purposes of effectively reducing the abrasion of the motor caused by the fact that the rotation speed of the motor is too high and the temperature is too high inside the motor, reducing the service life of the motor are achieved, and unnecessary loss caused by roasting of an internal circuit due to the fact that the temperature is too high is prevented.

Drawings

FIG. 1 is a schematic perspective view of the present invention;

FIG. 2 is a schematic diagram of an exploded perspective view of the motor of the present invention;

fig. 3 is a schematic plan sectional structure of the present invention.

In the figure: 1. an upper end cover; 2. an outer rotor casing; 3. a lower end cover; 4. a rotating shaft base; 5. positioning holes; 6. a bearing; 7. heat dissipation holes; 8. a connecting end; 9. a rotor assembly; 10. a card slot; 11. an inlet tank; 12. an excitation winding; 13. an inner stator core; 14. a permanent magnet pole; 15. an integrated circuit board; 16. an outlet aperture; 17. and a first roller bearing.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments obtained by those skilled in the art without creative efforts based on the technical solutions of the present invention belong to the protection scope of the present invention.

Referring to fig. 1 to 3, the present invention provides a technical solution: an outer rotor brushless DC motor with high load strength comprises an upper end cover 1, one side of the upper end cover 1 is sequentially connected with an outer rotor casing 2 and a lower end cover 3, a bearing 6 is arranged in the outer rotor casing 2, an outlet hole 16 is arranged in the center of the lower end cover 3 in a penetrating way, an integrated circuit board 15 is arranged at one end of the lower end cover 3, a plurality of heat dissipation holes 7 are arranged at two ends of the outer wall of the outer rotor casing 2, a plurality of permanent magnet magnetic poles 14 are uniformly distributed on the inner wall of the outer rotor casing 2, roller bearings 17 are fixedly connected at the upper side and the lower side of the inner wall of one end of the outer rotor casing 2, an inner stator iron core 13 is sleeved in the outer side of the outer stator iron core 13, an excitation winding 12 is uniformly distributed and fixedly connected at the center of the inner stator iron core 13, grooves are arranged at two ends of the inner stator iron core 13, and the upper and lower both ends in the recess all set up the line and connect the hole, and the line on the excitation winding 12 runs through the line and connects the hole and is connected with integrated circuit board 15 electricity.

Furthermore, an inlet groove 11 is formed in the center of the upper end cover 1, a roller bearing I17 is fixedly connected to the center of the inner portion of one end of the upper end cover 1, a roller can directly roll on the side wall of the bearing 6 and can bear heavy load and impact load, the bearing is a sealing structure and is filled with lubricating grease to provide long-term effective lubrication, abrasion in part movement can be reduced through lubrication, motor precision is guaranteed, and energy consumption is reduced.

Further, the one end of bearing 6 is equipped with pivot base 4, and a plurality of locating holes 5 have been seted up on the surface of pivot base 4, and the middle part of bearing 6 is equipped with rotor subassembly 9, and the other end fixedly connected with link 8 of bearing 6, draw-in groove 10 has been seted up to the one end of link 8 for other parts of external connection.

Further, the diameter of the rotor assembly 9 is larger than that of the bearing 6, the diameter of the rotor assembly 9 is consistent with that of the inlet slot 11 and the outlet slot 16, and the rotor assembly 9 corresponds to a circular hole formed in the center of the inner stator core 13, so that the rotor assembly 9 can enter the inside of the outer rotor casing 2 along the inlet slot 11, and the rotor assembly 9 and the circular hole can be fixed.

Further, the inner sides of the two roller bearings I17 are rotatably connected with the bearing 6, so that heavy load and impact load can be effectively borne.

Further, the inside of the outer rotor casing 2 is hollow, and the two ends of the outer rotor casing 2 are provided with hole grooves, and the hole grooves are corresponding to one ends of the upper end cover 1 and the lower end cover 3, so that the outer rotor casing 2 is convenient for combining the upper end cover 1 and the lower end cover 3, and is more convenient and faster.

The working principle is as follows: before the device is used, the safety of the device is checked, the bearing 6 penetrates through the upper end cover 1, the outer rotor casing 2 and the lower end cover 3, the rotor assembly 9 and the inner stator iron core 13 are fixed, a line penetrating line connection hole on the excitation winding 12 is connected with the integrated circuit board 15, and therefore the purpose that the integrated circuit board 15 controls the rotating speed of the inner stator iron core 13 and the bearing 6 is achieved, the roller can directly roll on the side wall of the bearing 6 through the upper side and the lower side of the bearing 6 through the roller bearing I17, and the purpose that heavy load and impact load can be borne is achieved.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the utility model, the scope of which is defined in the appended claims and their equivalents.

Claims

1. The utility model provides an outer rotor DC brushless motor with high load strength, includes upper end cover (1), its characterized in that: an outer rotor case (2) and a lower end cover (3) are sequentially connected to one side of the upper end cover (1), a bearing (6) is arranged in the outer rotor case, an outlet hole (16) is formed in the center of the lower end cover (3) in a penetrating mode, an integrated circuit board (15) is arranged at one end of the lower end cover (3), a plurality of heat dissipation holes (7) are formed in two ends of the outer wall of the outer rotor case (2), a plurality of permanent magnet magnetic poles (14) are uniformly distributed on the inner wall of the outer rotor case (2), roller bearings (17) are fixedly connected to the upper side and the lower side of the inner wall of one end of the outer rotor case (2), an inner stator iron core (13) is sleeved in the outer rotor case, excitation windings (12) are fixedly connected to the outer side of the inner stator iron core (13), a round hole is formed in the center of the inner stator iron core (13), and grooves are formed in two ends of the inner stator iron core (13), and the upper end and the lower end of the inside of the groove are provided with wired connection holes, and a line on the excitation winding (12) penetrates through the wired connection holes and is electrically connected with the integrated circuit board (15).

2. The external rotor dc brushless motor with high load strength according to claim 1, wherein: an inlet groove (11) is formed in the center of the upper end cover (1), and a first roller bearing (17) is fixedly connected to the center of the inner portion of one end of the upper end cover (1).

3. The external rotor dc brushless motor with high load strength according to claim 1, wherein: the one end of bearing (6) is equipped with pivot base (4), a plurality of locating holes (5) have been seted up on the surface of pivot base (4), the middle part of bearing (6) is equipped with rotor subassembly (9), the other end fixedly connected with link (8) of bearing (6), draw-in groove (10) have been seted up to the one end of link (8).

4. The external rotor dc brushless motor with high load strength according to claim 3, wherein: the diameter of the rotor assembly (9) is larger than that of the bearing (6), the diameter of the rotor assembly (9) is consistent with that of the inlet groove (11) and the outlet hole (16), and the rotor assembly (9) corresponds to a round hole formed in the center of the inner stator iron core (13).

5. The external rotor dc brushless motor with high load strength according to claim 1, wherein: the inner sides of the two roller bearings I (17) are rotatably connected with the bearing (6).

6. The external rotor dc brushless motor with high load strength according to claim 1, wherein: the inner part of the outer rotor casing (2) is hollow, hole grooves are formed in two ends of the outer rotor casing (2), and the hole grooves correspond to one ends of the upper end cover (1) and the lower end cover (3).