阅读说明：本技术 一种永磁直流无刷电机 (Permanent magnet brushless DC motor ) 是由 周洋 于 2019-10-08 设计创作，主要内容包括：本发明涉及电机技术领域,尤其涉及一种永磁直流无刷电机。它包括机壳(1)、支架(2)以及设置在机壳(1)与支架(2)之间的转子(3),且所述机壳(1)包括转子座(4)、固定环(5)以及外壳(6),所述转子座(4)与固定环(5)之间设置紧固筋(7),所述固定环(5)与外壳(6)之间设有导风筋(8),所述导风筋(8)上下两端的厚度小于导风筋(8)中部的厚度。这种永磁直流无刷电机导风效果较好。(The invention relates to the technical field of motors, in particular to a permanent magnet brushless direct current motor. It includes casing (1), support (2) and sets up rotor (3) between casing (1) and support (2), just casing (1) includes rotor seat (4), solid fixed ring (5) and shell (6), set up fastening muscle (7) between rotor seat (4) and solid fixed ring (5), be equipped with between solid fixed ring (5) and shell (6) air guide muscle (8), the thickness at both ends is less than the thickness at air guide muscle (8) middle part about air guide muscle (8). The permanent magnet brushless direct current motor has a good air guide effect.)

1. The utility model provides a permanent magnetism direct current brushless motor, includes casing (1), support (2) and sets up rotor (3) between casing (1) and support (2), just casing (1) is including rotor seat (4), solid fixed ring (5) and shell (6), set up fastening muscle (7) between rotor seat (4) and solid fixed ring (5), be equipped with between solid fixed ring (5) and shell (6) wind guiding muscle (8), its characterized in that: the thickness of the upper end and the lower end of the air guiding rib (8) is smaller than that of the middle part of the air guiding rib (8).

2. A permanent magnet brushless dc motor according to claim 1, wherein: the left side and the right side of the air guide rib (8) are cambered surfaces.

3. A permanent magnet brushless dc motor according to claim 1, wherein: the front and rear sections of the air guide ribs (8) are in a willow leaf shape.

4. A permanent magnet brushless dc motor according to claim 1, wherein: air guide muscle (8) divide into first air guide muscle and second air guide muscle, first air guide muscle sets up between solid fixed ring (5) and shell (6) with the even interval of second air guide muscle, just the height that highly is greater than the second air guide muscle of first air guide muscle.

5. A permanent magnet brushless dc motor according to claim 1, wherein: and the fixing ring (5) is provided with an installation position (9) for installing an installation part on the bracket (2), and a wind guide rib (8) is arranged between the installation position (9) and the shell (6).

6. A permanent magnet brushless DC motor according to claim 5, characterized in that: the air guiding rib (8) is divided into a connecting part (10) and an air guiding part (11), and the length ratio of the air guiding part (11) of the air guiding rib (8) between the mounting position (9) and the shell (6) to the lengths of the air guiding parts (11) of other air guiding ribs (8) is 0.8-0.9: 1.

7. A permanent magnet brushless dc motor according to claim 1, wherein: the diameter of the lower end of the inner surface of the fixing ring (5) is larger than that of the upper end of the inner surface.

8. A permanent magnet brushless dc motor according to claim 1, wherein: the rotor (3) is the rotor (3) with the cantilever type bearing, and two sets of fastening ribs (7) are arranged between the rotor seat (4) and the fixing ring (5), and the two sets of fastening ribs (7) are staggered up and down at intervals.

9. A permanent magnet brushless dc motor according to claim 1, wherein: the rotor mounting structure is characterized in that a first mounting part (12) used for mounting the rotor (3) and a second mounting part (13) used for mounting the support (2) on the machine shell (1) are arranged on the support (2), heat dissipation holes (14) are formed between the first mounting part (12) and the second mounting part (13), and the heat dissipation holes (14) are also formed between the second mounting part (13) and the edge of the support (2).

10. A permanent magnet brushless dc motor according to claim 9, wherein: the outer end face of the second mounting piece (13) is an arc face.

Technical Field

The invention relates to the technical field of motors, in particular to a permanent magnet brushless direct current motor.

Background

The small permanent magnet brushless direct current motor is exquisite in structure, is widely applied due to the advantages of high working efficiency, low noise and the like, and almost extends to various fields of aerospace, national defense, industrial and agricultural production and daily life. The electric fan is usually applied to household appliances such as electric fans, electric hair dryers, handheld dust collectors and the like in daily life.

Permanent magnetism direct current brushless motor generally includes casing and support, and the rotor setting is between casing and support, and the casing generally includes the rotor seat, gu fixed ring and shell, gu be equipped with the fastening muscle between fixed ring and the rotor seat, gu be provided with a plurality of wind guiding muscle between fixed ring and the shell, but prior art's wind guiding muscle is the flat-plate-like of vertical setting, and windage is higher like this, and the noise that produces when wind passes through is also great, and then has leaded to the wind-guiding effect relatively poor.

Disclosure of Invention

The technical problem to be solved by the invention is as follows: the permanent magnet brushless direct current motor with the good air guide effect is provided.

The technical scheme adopted by the invention is as follows: the utility model provides a permanent magnetism DC brushless motor, includes casing, support and sets up the rotor between casing and support, just the casing includes rotor seat, solid fixed ring and shell, set up fastening muscle between rotor seat and the solid fixed ring, be equipped with the wind guiding muscle between solid fixed ring and the shell, the thickness at both ends is less than the thickness at wind guiding muscle middle part about the wind guiding muscle.

Compared with the prior art, the invention has the following advantages by adopting the structure: the thickness of the upper end and the lower end of the air guiding rib is made smaller than that of the middle part, so that when wind contacts the lower part or the upper part of the air guiding rib, the wind resistance is smaller, and part of noise can be reduced.

Preferably, the left side and the right side of the air guide rib are cambered surfaces. The air guide rib is arranged in the air guide groove, air can enter from the bottom and can be guided through the cambered surfaces on the left side and the right side of the air guide rib, the air resistance is small, and the air guide effect is good.

Preferably, the front and rear sections of the air guide ribs are willow-leaf-shaped. The front and rear sections of the wind guide rib are made into a willow leaf shape, so that the wind guide rib is similar to the shape of a fan wing in the whole view, the wind resistance is smaller, and the wind guide effect is better.

Preferably, the air guide rib is divided into a first air guide rib and a second air guide rib, the first air guide rib and the second air guide rib are arranged between the fixing ring and the shell at uniform intervals, and the height of the first air guide rib is larger than that of the second air guide rib. Set up length wind-guiding muscle through the interval, wind-guiding effect is better like this.

Preferably, the fixing ring is provided with an installation position for installing an installation part on the support, and a wind guide rib is arranged between the installation position and the shell. The wind guiding ribs are also arranged between the mounting positions and the shell, so that the wind guiding ribs are equivalent to fewer wind guiding positions on the shell, and the wind path is smoother.

Preferably, the air guiding rib is divided into a connecting part and an air guiding part, and the length ratio of the air guiding part of the air guiding rib between the mounting position and the shell to the air guiding parts of other air guiding ribs is 0.8-0.9: 1. The air guide ribs between the installation position and the shell are similar to the air guide ribs at other positions as far as possible, and poor air guide effect caused by too short length of the air guide part is avoided.

Preferably, the diameter of the lower end of the inner surface of the fixing ring is larger than the diameter of the upper end of the inner surface. Therefore, the inner surface of the fixing ring is made into a horn-shaped opening, and a good wind gathering effect can be achieved.

Preferably, the rotor is provided with a cantilever type bearing, two groups of fastening ribs are arranged between the rotor seat and the fixing ring, and the two groups of fastening ribs are arranged in a vertically staggered mode at intervals. Because the rotor length that has the cantilever type bearing is longer, will lead to the rotor seat to be thicker like this, so need two sets of fastening muscle to fix to can reach the better advantage of fastening effect through setting up two sets of fastening muscle staggers.

Preferably, the bracket is provided with a first mounting part for mounting the rotor and a second mounting part for mounting the bracket on the casing, the heat dissipation holes are arranged between the first mounting part and the second mounting part, and the heat dissipation holes are also arranged between the second mounting part and the edge of the bracket. Set up a plurality of louvres on the support, can make things convenient for the motor to dispel the heat like this under the prerequisite that does not influence the support normal function.

Preferably, the outer end surface of the second mounting member is a circular arc surface. Set up like this, the back is installed on the casing to the second installed part, and the support is also less to the windage of the wind of leading from the casing, and then makes motor wind-guiding effect better.

Drawings

Fig. 1 is an exploded view of a permanent magnet dc brushless motor according to the present invention.

Fig. 2 is a schematic structural diagram of a housing of a permanent magnet brushless dc motor according to a first embodiment of the present invention.

Fig. 3 is a cross-sectional view in the direction AA in fig. 2.

Fig. 4 is a cross-sectional view in the direction BB in fig. 2.

Fig. 5 is a schematic structural diagram of a bracket according to a first embodiment of the permanent magnet brushless dc motor of the present invention.

Fig. 6 is a schematic structural diagram of a housing of a permanent magnet dc brushless motor according to a second embodiment of the present invention.

Fig. 7 is a schematic structural diagram of a rotor of a permanent magnet dc brushless motor according to a third embodiment of the present invention.

Fig. 8 is a schematic structural diagram of a housing of a third embodiment of a permanent magnet brushless dc motor according to the present invention.

Fig. 9 is a schematic structural diagram of a bracket according to a fourth embodiment of the permanent magnet brushless dc motor of the present invention.

As shown in the figure: 1. a housing; 2. a support; 3. a rotor; 4. a rotor base; 5. a fixing ring; 6. a housing; 7. fastening ribs; 8. a wind guiding rib; 9. an installation position; 10. a connecting portion; 11. a wind guide part; 12. a first mounting member; 13. a second mount; 14. and (4) heat dissipation holes.

Detailed Description

The present invention will be further described below by way of specific embodiments, but the present invention is not limited to the following specific embodiments.