Claw type installation structure of inner rotor permanent magnet direct current brushless motor

Abstract

The utility model relates to the technical field of permanent magnet direct current brushless motors, and discloses a claw-type mounting structure of an inner rotor permanent magnet direct current brushless motor, which comprises a stator core lamination, an enameled wire winding is fixedly mounted on the outer side of the stator core lamination, and a front claw-type motor mounting frame is in bolted connection with the front surface of the stator core lamination. The front surface of the stator core lamination is in threaded connection with a front claw type motor mounting rack, the rear surface of the stator core lamination is in threaded connection with a rear claw type motor mounting rack, bearings are fixedly mounted on the inner sides of the front claw type motor mounting rack and the rear claw type motor mounting rack, a shaft is fixedly mounted between the two bearings, and a rotor core is fixedly mounted on the outer side of the shaft; a plurality of magnets are fixedly installed on the rotor iron core. The claw type installation structure of the inner rotor permanent magnet direct current brushless motor is low in wind noise and has excellent quality of low mechanical friction noise and low wind noise, the motor is stable in installation and reliable in operation, and the overall performance of the motor is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of permanent magnet direct current brushless motors, in particular to a claw-type installation structure of an inner rotor permanent magnet direct current brushless motor. Background Art

[0002] The inner rotor permanent magnet brushless DC motor is a DC motor that uses permanent magnets as the excitation source. Compared with traditional DC motors, it removes brushes and commutators, so it is also called a brushless DC motor. The rotor of this motor is a built-in permanent magnet, and the stator is composed of windings. Due to the use of permanent magnets, the motor has the advantages of simple structure, high efficiency, high power density, and a wide speed adjustment range.

[0003] The common inner rotor permanent magnet DC brushless motors on the market mainly adopt a cylindrical shell opening type motor mounting structure or a straight-line open type motor mounting structure. The cylindrical shell opening type motor mounting structure has serious turbulence at the air inlet and outlet, which is easy to generate wind noise; the straight-line open type mounting structure has two mounting positions arranged in a straight line, and its two force points are unstable and easy to deform, which causes the motor to rotate unsmoothly and generates mechanical noise. Therefore, the present application proposes a claw-type mounting structure for an inner rotor permanent magnet DC brushless motor to solve the above technical problems. Utility Model Content

[0004] 1. Technical issues to be resolved

[0005] In view of the deficiencies in the prior art, the utility model provides a claw-type mounting structure for an inner-rotor permanent magnet brushless DC motor, which has the advantages of better stability, etc., and solves the problem that the inner-rotor permanent magnet brushless DC motor adopts a cylindrical shell opening type and a straight-shaped open structure design, which cannot simultaneously solve the problems of wind duct turbulence and installation stability, and thus cannot obtain smaller wind noise and lower mechanical friction sound.

[0006] (II) Technical solution

[0007] In order to achieve the above-mentioned purpose of better stability, the utility model provides the following technical solutions: a claw-type mounting structure of an inner rotor permanent magnet DC brushless motor, comprising a stator core lamination, an enameled wire winding is fixedly mounted on the outer side of the stator core lamination, a front claw-type motor mounting frame is bolted to the front surface of the stator core lamination, and a rear claw-type motor mounting frame is threaded to the rear surface of the stator core lamination;

[0008] Bearings are fixedly installed on the inner sides of the front claw type motor mounting frame and the rear claw type motor mounting frame, a shaft is fixedly installed between the two bearings, a rotor core is fixedly installed on the outer side of the shaft, a number of magnets are fixedly installed on the rotor core, and a fan blade located behind the rotor core is fixedly installed on the outer side of the shaft.

[0009] Preferably, the front and rear surfaces of the stator core laminations are each provided with three mounting holes evenly distributed around the circumference.

[0010] Preferably, the front claw type motor mounting bracket and the rear claw type motor mounting bracket are both rotatably connected with screws, the screws are located in the mounting holes, and the screws are threadedly connected to the inner side walls of the mounting holes.

[0011] Preferably, the front surface of the front claw type motor mounting frame and the rear surface of the rear claw type motor mounting frame are both provided with bearing chambers, and the bearings are fixedly mounted on the inner sides of the front claw type motor mounting frame and the rear claw type motor mounting frame through the bearing chambers.

[0012] Preferably, the stator core laminations and the enameled wire windings fixedly installed on the outside constitute the stator, and the rotor core, shaft, magnets, and fan blades together constitute the rotor.

[0013] Preferably, the vertical center line of the stator and the vertical center line of the rotor coincide with each other.

[0014] (III) Beneficial effects

[0015] Compared with the prior art, the utility model provides a claw-type mounting structure of an inner rotor permanent magnet DC brushless motor, which has the following beneficial effects:

[0016] The claw-type mounting structure of the inner rotor permanent magnet DC brushless motor is that when the stator enameled wire armature winding is energized, the magnet will drive the rotor to rotate. Since the front claw-type motor mounting frame and the rear claw-type motor mounting frame are both designed with claw-type structures, they are fixed to the stator core laminations through the stator core lamination mounting holes and screws. The various assembly points of the mounting surface are tightly fitted and evenly stressed. The three mounting points are diagonally distributed, and any point is diagonally stressed, with balanced force, which reduces the possibility of poor motor operation caused by improper installation by production workers causing deformation of parts, greatly reduces production defects, and improves production efficiency; the mounting surface is distributed in a triangular shape, and is firmly connected to the external mechanism and evenly stressed. At the same time, less material is used for a single part, and the cost advantage is obvious; the claw-type mounting structure is an asymmetric open motor mounting frame, and there is no wind duct turbulence, so the wind noise will also be low. It has the excellent qualities of low mechanical friction noise and low wind noise, and the motor is stably installed and reliable in operation, which improves the overall performance of the motor. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 This is a schematic diagram of the main structure of the utility model;

[0018] Figure 2 This is a left-side structural schematic diagram of the utility model;

[0019] Figure 3 It is a schematic diagram of the overall three-dimensional structure of the utility model;

[0020] Figure 4 This is a schematic diagram of the three-dimensional structure of the front claw type motor mounting frame of the utility model;

[0021] Figure 5 It is a schematic diagram of the three-dimensional structure of the rear claw type motor mounting frame of the utility model.

[0022] In the figure: 1. stator core laminations; 2. enameled wire winding; 3. front claw type motor mounting frame; 4. rear claw type motor mounting frame; 5. bearing; 6. shaft; 7. screw; 8. rotor core; 9. magnet; 10. fan blade. DETAILED DESCRIPTION

[0023] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0024] See also Figure 1-5 , a claw-type mounting structure of an inner rotor permanent magnet DC brushless motor, comprising a stator core lamination 1, the front and rear surfaces of the stator core lamination 1 are each provided with three mounting holes evenly distributed in a circumference, an enameled wire winding 2 is fixedly mounted on the outer side of the stator core lamination 1, the stator core lamination 1 and the enameled wire winding 2 fixedly mounted on the outer side constitute a stator, a front claw-type motor mounting frame 3 is bolted to the front surface of the stator core lamination 1, a rear claw-type motor mounting frame 4 is threadedly connected to the rear surface of the stator core lamination 1, a screw 7 is rotatably connected to the front claw-type motor mounting frame 3 and the rear claw-type motor mounting frame 4, the screw 7 is located in the mounting hole, and the screw 7 is threadedly connected to the inner side wall of the mounting hole, and a bearing chamber is provided on the front surface of the front claw-type motor mounting frame 3 and the rear surface of the rear claw-type motor mounting frame 4;

[0025] Bearings 5 ​​are fixedly installed on the inner sides of the front claw type motor mounting frame 3 and the rear claw type motor mounting frame 4. The bearings 5 ​​are fixedly installed on the inner sides of the front claw type motor mounting frame 3 and the rear claw type motor mounting frame 4 through bearing chambers. A shaft 6 is fixedly installed between the two bearings 5. A rotor core 8 is fixedly installed on the outer side of the shaft 6. A number of magnets 9 are fixedly installed on the rotor core 8. Fan blades 10 located behind the rotor core 8 are fixedly installed on the outer side of the shaft 6. The rotor core 8, shaft 6, magnets 9, and fan blades 10 together constitute a rotor, and the vertical center line of the stator and the vertical center line of the rotor coincide with each other.

[0026] In summary, the claw-type mounting structure of the inner rotor permanent magnet DC brushless motor, when the stator enameled wire armature winding 2 is energized, the magnet 9 will drive the rotor to rotate. Since the front claw-type motor mounting frame 3 and the rear claw-type motor mounting frame 4 are both designed with claw-type structures, they are fixed to the stator core laminations 1 through the stator core laminations 1 mounting holes and screws 7. The various assembly points of the mounting surface are tightly fitted and evenly stressed. The three mounting points are diagonally distributed, and any point is diagonally stressed, and the force is balanced, which reduces the possibility of poor motor operation caused by improper installation by production workers, greatly reduces production defects, and improves production efficiency; the mounting surface is distributed in a triangular shape, and is firmly connected to the external mechanism, and is evenly stressed. At the same time, less material is used for a single part, and the cost advantage is obvious; the claw-type mounting structure is an asymmetric open motor mounting frame, and there is no wind duct turbulence, so the wind noise will also be low. It has the excellent qualities of low mechanical friction noise and low wind noise, and the motor is stably installed and reliable in operation, which improves the overall performance of the motor.

[0027] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the sentence "comprise a ..." do not exclude the existence of other identical elements in the process, method, article or device including the elements.

[0028] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A claw-type mounting structure for an inner rotor permanent magnet brushless DC motor, comprising a stator core lamination (1), Features: An enameled wire winding (2) is fixedly mounted on the outer side of the stator core lamination (1), a front claw-type motor mounting frame (3) is bolted to the front surface of the stator core lamination (1), and a rear claw-type motor mounting frame (4) is threaded to the rear surface of the stator core lamination (1); Bearings (5) are fixedly mounted on the inner sides of the front claw-type motor mounting frame (3) and the rear claw-type motor mounting frame (4); a shaft (6) is fixedly mounted between the two bearings (5); a rotor core (8) is fixedly mounted on the outer side of the shaft (6); a number of magnets (9) are fixedly mounted on the rotor core (8); and a fan blade (10) located behind the rotor core (8) is fixedly mounted on the outer side of the shaft (6).

2. The claw-type mounting structure of the inner rotor permanent magnet brushless DC motor according to claim 1, Features: The front and rear surfaces of the stator core laminations (1) are each provided with three mounting holes evenly distributed in a circumference.

3. The claw-type mounting structure of the inner rotor permanent magnet brushless DC motor according to claim 2, Features: The front claw type motor mounting frame (3) and the rear claw type motor mounting frame (4) are both rotatably connected with screws (7), the screws (7) are located in the mounting holes, and the screws (7) are threadedly connected to the inner side walls of the mounting holes.

4. The claw-type mounting structure of the inner rotor permanent magnet brushless DC motor according to claim 1, Features: The front surface of the front claw type motor mounting frame (3) and the rear surface of the rear claw type motor mounting frame (4) are both provided with bearing chambers, and the bearings (5) are fixedly mounted on the inner sides of the front claw type motor mounting frame (3) and the rear claw type motor mounting frame (4) through the bearing chambers.

5. The claw-type mounting structure of the inner rotor permanent magnet brushless DC motor according to claim 1, Features: The stator core laminations (1) and the enameled wire windings (2) fixedly mounted on the outside constitute a stator, and the rotor core (8), the shaft (6), the magnet (9), and the fan blades (10) together constitute a rotor.

6. The claw-type mounting structure of the inner rotor permanent magnet brushless DC motor according to claim 5, Features: The vertical center line of the stator and the vertical center line of the rotor coincide with each other.

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