CN220874282U

CN220874282U - Miniature claw pole type motor framework for improving motor efficiency and fan thereof

Info

Publication number: CN220874282U
Application number: CN202322503000.0U
Authority: CN
Inventors: 贾自周; 韩满仓; 袁美华
Original assignee: Dongguan Hongying Electronic Technology Co ltd
Current assignee: Dongguan Hongying Electronic Technology Co ltd
Priority date: 2023-09-15
Filing date: 2023-09-15
Publication date: 2024-04-30
Anticipated expiration: 2033-09-15

Abstract

The utility model discloses a miniature claw-pole motor framework for improving motor efficiency, which comprises a bottom plate, a PCB (printed circuit board), a stator assembly sleeved on the bottom plate and a rotor assembly sleeved on the stator assembly, wherein the stator assembly comprises an upper claw pole, a magnetic conduction middle pipe is integrally formed in the middle of the upper claw pole, annular concentrated windings are sleeved on the outer wall of the magnetic conduction middle pipe, lower claw poles are oppositely and alternately arranged on the upper claw pole, a flange boss is arranged in the middle of the lower claw pole, the inner wall of the flange boss is sleeved with the magnetic conduction middle pipe, the bottom of the outer wall of the magnetic conduction middle pipe is sleeved on the bottom plate, and the rotor assembly is sleeved on the magnetic conduction middle pipe; the rotor assembly is sleeved with an impeller, a side frame is integrally formed on the side wall of the bottom plate, and an upper cover is covered on the top of the side frame; the design purpose is as follows: the magnetic leakage between the upper claw pole and the magnetic conduction middle pipe and between the lower claw pole and the magnetic conduction middle pipe is effectively avoided, and the motor efficiency is improved.

Description

Miniature claw pole type motor framework for improving motor efficiency and fan thereof

Technical Field

The utility model relates to the technical field of claw-pole motors, in particular to a miniature claw-pole motor framework for improving motor efficiency and a fan thereof.

Background

The claw pole motor is one of the traditional motors, has the advantages of high efficiency, high precision, high reliability and the like, and is widely applied to industrial production.

Such as patent document No.: CN107210626a, patent name: a claw pole motor and a Chinese patent of household appliances comprising the same, wherein the disclosed claw pole motor is one of the structures of the traditional claw pole motor, and the specification and drawings and the specification [0120] section specifically disclose: the claw-pole motor may include a rotor in which a plurality of permanent magnets (referred to as "poles" in the claims) are arranged in an inner circumferential direction, a plurality of claw poles extending in an axial direction, and a stator in which an inner circumferential surface of the rotor faces an outer circumferential surface of the stator. Further, the rotor may be rotated by attractive and repulsive forces generated between permanent magnets of the rotor and claw poles of the stator, and the rotor may be rotated in a circumferential direction with respect to a virtual axis located at the center. The drawings in the specification and the descriptions [0123] to [0175] specifically disclose: the stator may include U-phase, V-phase and W-phase cores forming a magnetic circuit for magnetizing the claw poles, and U-phase, V-phase and W-phase coils for magnetizing the respective cores. The U-phase core may include a U-phase core body disposed on an axis of the rotating shaft and a plurality of U-phase claw poles disposed in an edge portion of the U-phase core body and extending in an axial direction of the rotating shaft. The U-phase core body may include an annular member I for supporting U-phase claw poles arranged at equal intervals of degrees and a central cylindrical member formed on one surface of the annular member I and provided integrally with the annular member I in the same axial line as the annular member I. The V-phase core may include a V-phase core body disposed under the U-phase core body on an axis of the rotating shaft and a plurality of V-phase claw poles coupled with an outer circumference of the V-phase core body and extending in an axial direction of the rotating shaft. The V-phase core body may include a central cylindrical member having a central bore. The W-phase core may include a W-phase core body disposed below the V-phase core body and a plurality of W-phase claw poles coupled with the W-phase core body and extending in an axial direction. The W-phase core body may include an annular member for supporting the W-phase claw poles arranged at equal intervals of degrees and a central cylindrical member formed on one surface of the annular member and provided integrally with the annular member in the same axial line as the annular member. Wherein the central cylindrical member may correspond to the first elongated portion described in the patent document claim and protrude in the same direction as the U-phase claw pole extends. The central cylindrical member may correspond to the surrounding member described in the patent document claims, and the inner diameter of the central cylindrical member may be equal to the outer diameter of the central cylindrical member of the U-phase core. The central cylindrical member may correspond to the second elongated portion described in the patent document claim, and protrude toward the U-phase core body.

Specifically, in the U-phase core, the V-phase core, and the W-phase core, the front end surface of the central cylindrical member of the U-phase core may face the front end surface of the central cylindrical member of the W-phase core such that the center line of the U-phase core body and the center line of the W-phase core body are located on the axis of the rotary shaft, wherein the front end surface of the central cylindrical member of the U-phase core may be close to or in contact with the front end surface of the central cylindrical member of the W-phase core. The front end surface of the central cylindrical member of the U-phase core may contact the front end surface of the central cylindrical member of the W-phase core without creating any gap in the central hole of the central cylindrical member of the V-phase core such that the center line of the V-phase core body is located on the axis of the rotary shaft.

However, in the actual manufacturing process, the U-phase core, the V-phase core, and the W-phase core are formed by assembly, and because of the coaxiality errors that occur among the central cylindrical member of the U-phase core, the central cylindrical member of the V-phase core, and the central cylindrical member of the W-phase core, air gaps that increase magnetic leakage, reduce magnetic induction, and reduce motor output efficiency still occur between the three.

Therefore, the conventional claw pole motor and its fan have the above-mentioned drawbacks of magnetic leakage and low motor efficiency. Therefore, a new claw-pole motor structure and a fan thereof are urgently needed in the market to reduce magnetic leakage between the claw-pole teeth and the fixed shaft so as to improve the output efficiency of the motor.

Disclosure of utility model

The utility model aims to overcome the defects in the prior art and provide a miniature claw-pole motor framework for improving motor efficiency and a fan thereof, and in the first aspect, an upper claw pole and a magnetic conduction middle pipe are directly integrally formed, so that the problem of magnetic leakage between the upper claw and the middle pipe is thoroughly solved, and the motor efficiency is effectively improved; in the second aspect, the assembly precision of the lower claw pole and the magnetic conduction middle tube is improved, the sealing degree and the perpendicularity are guaranteed, the problem of magnetic leakage between the lower claw and the middle tube is solved, and the motor efficiency is effectively improved.

In order to achieve the above purpose, the present utility model is realized by the following technical scheme:

In a first aspect, a miniature claw-pole motor structure for improving motor efficiency, which comprises a base plate, still including installing PCB board on the bottom plate, the stator module of cover on the bottom plate and the rotor module of cover on the stator module are established to the cover, the stator module includes the claw pole, go up claw pole middle part integrated into one piece and have in the magnetic conduction, pipe outer wall cover is equipped with annular concentrated winding in the magnetic conduction, go up claw pole relatively and crisscross being provided with down claw pole, lower claw pole middle part is equipped with the flange boss, flange boss inner wall and magnetic conduction are in the pipe joint, pipe outer wall bottom cover is established on the bottom plate in the magnetic conduction, rotor module cover is established in the magnetic conduction on the pipe.

Preferably, the inner wall of the flange boss is sleeved with the magnetic conduction middle pipe in an interference sleeve or transition sleeve mode; the sealing degree of the lower claw pole and the magnetic conduction middle pipe is further improved, and the magnetic leakage problem between the lower claw pole and the magnetic conduction middle pipe is further reduced.

Preferably, the upper claw pole, the magnetic conductive middle tube and the lower claw are made of high magnetic conductivity materials which are easy to punch; the defects existing in the prior art are as follows: the upper claw and the lower claw of the traditional claw-pole motor generally adopt silicon steel sheets, however, the mechanical processing stress generated in the stamping or blanking process of the silicon steel sheets can change the magnetic domain direction inside the silicon steel sheets, so that the magnetic performance is deteriorated, and the motor efficiency is reduced. To compensate for this performance loss, the machined part must be stress relieved and annealed, thus increasing cost. In addition, as the silicon steel sheet is made of iron-silicon alloy, the hardness is higher, the die is more suitable for blanking and is not suitable for stamping, the die is difficult to form when stamping forming is adopted, the service life of the die is lower, high-grade die materials are required for prolonging the service life of the die, and the cost of the die is further increased; the problem that this technical scheme solved is: the magnetic induction intensity of the stator assembly is reduced through magnetic circuit optimization, and the iron loss is reduced, so that the silicon steel sheet can be replaced by a material with high magnetic permeability which is easy to punch, and a certain process can be adopted, and the upper claw pole and the magnetic conduction middle tube are directly integrally formed through the certain process, so that the problem of magnetic leakage between the upper claw and the magnetic conduction middle tube is thoroughly solved.

Preferably, the annular concentrated winding is annularly arranged in the interior between the upper claw pole and the lower claw pole.

Preferably, the bottom of the flange boss is abutted to the top of the bottom plate, and the bottom of the outer wall of the magnetic conduction middle tube is fixedly sleeved on the bottom plate in a dispensing mode.

Preferably, the inner wall of the magnetic conduction middle pipe is sleeved with a bearing, the rotor assembly comprises a shaft core inserted on the bearing, a motor shell arranged at the top of the shaft core and a permanent magnet arranged on the inner wall of the motor shell in a surrounding mode, and the permanent magnet is arranged on the outer side between the upper claw pole and the lower claw pole in a surrounding mode.

Preferably, a driving IC is installed at the bottom of the PCB board, and a HALL sensor is installed in the driving IC.

In a second aspect, a fan includes a miniature claw pole motor structure for improving motor efficiency, an impeller is sleeved on the rotor assembly, a side frame is integrally formed on the side wall of the bottom plate, and an upper cover is covered on the top of the side frame.

Preferably, the impeller is provided with a plurality of blades in the circumferential direction.

Preferably, the upper cover is provided with an air inlet, and one end among the upper cover, the side frame and the bottom plate is provided with an air outlet.

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

1. The upper claw pole and the magnetic conduction middle pipe are integrally formed, so that magnetic leakage between the upper claw pole and the magnetic conduction middle pipe is effectively avoided, and the motor efficiency is effectively improved.

2. According to the utility model, the lower claw pole is provided with the flange boss, the inner wall of the flange boss is sleeved with the magnetic conduction middle pipe, and the outer wall of the flange boss is sleeved on the PCB, so that the sealing degree and the perpendicularity between the lower claw pole and the magnetic conduction middle pipe are ensured, the motor efficiency is effectively improved, and the contact area between the lower claw pole and the magnetic conduction middle pipe is increased by the flange boss, so that the assembly is more stable, and the magnetic leakage between the lower claw pole and the magnetic conduction middle pipe is further effectively reduced.

3. In addition, the advantages of the structural design are as follows: the flange boss extends longitudinally, does not extend along a winding area of the annular concentrated winding, and can effectively avoid occupying space of the winding area.

4. In addition, the structural design can improve the rigidity of the whole structure, optimize the vibration noise of the fan and improve the sound quality of the product.

5. In summary, the miniature claw-pole motor structure and the fan thereof for improving the motor efficiency provided by the utility model effectively avoid magnetic leakage between the upper claw pole and the magnetic conduction middle pipe and between the lower claw pole and the magnetic conduction middle pipe, effectively improve the motor efficiency, and simultaneously ensure the sealing degree and the verticality between the upper claw pole, the lower claw pole and the magnetic conduction middle pipe, and ensure the assembly simplicity and the fan yield.

Drawings

In order to more clearly illustrate the embodiments of the present utility model or the technical solutions in the prior art, the drawings that are required in the embodiments or the description of the prior art will be briefly described, and it is obvious that the drawings in the following description are some embodiments of the present utility model, and other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.

FIG. 1 is a schematic front cut-away view of a miniature claw-pole motor architecture and a fan thereof for improving motor efficiency according to an embodiment of the present utility model;

FIG. 2 is a schematic exploded view of a stator assembly provided by an embodiment of the present utility model;

FIG. 3 is a schematic view of the structure of the upper claw pole and the magnetically conductive middle tube provided by the embodiment of the utility model;

Fig. 4 is a schematic structural view of a claw pole according to an embodiment of the present utility model.

The drawings include:

1. A bottom plate; 11. a side frame; 110. an air inlet; 12. an upper cover; 120. an air outlet; 2. a PCB board; 3. a stator assembly; 31. an upper claw pole; 32. a magnetic conductive middle tube; 33. a toroidal concentrated winding; 34. a lower claw pole; 35. a flange boss; 4. a rotor assembly; 41. a bearing; 42. a shaft core; 43. a motor housing; 44. an impeller; 45. a blade; 48. a permanent magnet; 49. wear-resistant plate.

Detailed Description

The technical solutions of the present embodiment of the present utility model will be clearly and completely described below with reference to the drawings in the present embodiment of the present utility model, and it is apparent that the described present embodiment is one embodiment of the present utility model, but not all the present embodiments. All other embodiments, which can be made by those skilled in the art without making any inventive effort, are intended to be within the scope of the present utility model.

Referring to fig. 1 to 2, an embodiment of the utility model provides a miniature claw-pole motor structure for improving motor efficiency, which comprises a bottom plate 1, a PCB board 2 arranged on the bottom plate 1, a stator assembly 3 sleeved on the bottom plate 1, and a rotor assembly 4 sleeved on the stator assembly 3, wherein the stator assembly 3 comprises an upper claw pole 31, a middle part of the upper claw pole 31 is integrally formed with a magnetic conducting middle tube 32, an annular concentrated winding 33 is sleeved on the outer wall of the magnetic conducting middle tube 32, the upper claw poles 31 are opposite and staggered with a lower claw pole 34, a flange boss 35 is arranged in the middle part of the lower claw pole 34, the inner wall of the flange boss 35 is sleeved with the magnetic conducting middle tube 32, the bottom of the outer wall of the magnetic conducting middle tube 32 is sleeved on the bottom plate 1, and the rotor assembly 4 is sleeved on the magnetic conducting middle tube 32. The middle part of the upper claw pole 31 and the magnetic conductive middle tube 32 are integrally formed, and before assembly, the middle part of the upper claw pole 31 and the magnetic conductive middle tube 32 form a physically undetachable whole; the integral forming mode is stamping, turning, metal injection molding, laser welding, resistance welding or ultrasonic welding and the like.

The inner wall of the flange boss 35 is sleeved with the magnetic conduction middle pipe 32 in an interference sleeve or transition sleeve mode; the sealing degree of the lower claw pole 34 and the magnetic conduction middle pipe 32 is further improved, and the magnetic leakage problem between the lower claw pole 34 and the magnetic conduction middle pipe 32 is further reduced.

The upper claw pole 31, the magnetic conductive middle tube 32, and the lower claw pole 34 are made of easily punched high magnetic permeability material such as electromagnetic pure iron, low carbon steel, ferrite stainless steel, etc. The adoption of the stamping high-permeability material member has the advantages that: the magnetic induction intensity of the stator assembly 3 is reduced through magnetic circuit optimization, and the iron loss is reduced, so that the silicon steel sheet can be replaced by a material with high magnetic permeability which is easy to punch, a certain process can be adopted, the upper claw pole 31 and the magnetic conduction middle tube 32 are directly integrally formed through a certain process, and the magnetic leakage between the upper claw pole 31 and the magnetic conduction middle tube 32 is avoided.

The PCB board 2 is electrically connected with the stator assembly 3. A drive IC is arranged at the bottom of the PCB 2, and a HALL sensor is arranged in the drive IC. The purpose of this design is to let the HALL sensor face away from the magnetic field of the stator assembly 3 and the rotor assembly 4, so that interference is avoided.

An annular concentrated winding 33 is disposed around the inside between the upper claw pole 31 and the lower claw pole 34. The annular concentrated winding 33 adopts a self-adhesive coil, so that the winding space is effectively increased. Meanwhile, the annular concentrated winding 33 is fixedly sleeved on the outer wall of the magnetic conduction middle tube 32 in a dispensing mode.

The bottom of the flange boss 35 is abutted against the top of the bottom plate 1. When the rotor assembly 4 is integrally sleeved on the base plate 1, the flange boss 35 of the lower claw pole 34 plays a role in longitudinal positioning. The bottom of the outer wall of the magnetic conduction middle tube 32 is fixedly sleeved on the bottom plate 1 in a dispensing mode.

The inner wall of the magnetic conduction middle tube 32 is sleeved with a bearing 41, the rotor assembly 4 comprises a shaft core 42 inserted on the bearing 41, a motor shell 43 arranged at the top of the shaft core 42 and a permanent magnet 48 arranged on the inner wall of the motor shell 43 in a surrounding manner, and the permanent magnet 48 is arranged on the outer side between the upper claw pole 31 and the lower claw pole 34 in a surrounding manner. The rotor assembly 4 further comprises wear plates 49 arranged at the bottom of the inner wall of the magnetic conductive middle tube 32, and the bottom of the shaft core 42 is abutted against the wear plates 49.

The embodiment of the utility model also provides a fan, which comprises the miniature claw-pole motor framework for improving the motor efficiency, wherein the impeller 44 is sleeved on the rotor assembly 4, the side wall of the bottom plate 1 is integrally formed with the side frame 11, and the top of the side frame 11 is covered with the upper cover 12. Wherein the impeller 44 is sleeved on the motor casing 43.

The impeller 44 is provided with a number of blades 45 circumferentially.

The upper cover 12 is provided with an air inlet 110, and one end among the upper cover 12, the side frames 11 and the bottom plate 1 is provided with an air outlet 120.

The utility model provides a miniature claw-pole motor structure for improving motor efficiency and a fan thereof, which are mainly designed to effectively avoid magnetic leakage between an upper claw pole 31 and a magnetic conduction middle pipe 32 and between a lower claw pole 34 and the magnetic conduction middle pipe 32, effectively improve motor efficiency, and simultaneously ensure tightness and verticality between the upper claw pole 31, the lower claw pole 34 and the magnetic conduction middle pipe 32, and ensure simple assembly and fan yield.

The foregoing is only illustrative of the preferred embodiments of the present utility model and is not to be construed as limiting the utility model, but rather as various modifications, equivalent arrangements, improvements, etc., within the spirit and principles of the present utility model.

Claims

1. The utility model provides an improve miniature claw-pole motor framework of motor efficiency, includes bottom plate (1), its characterized in that still includes PCB board (2) of installing on bottom plate (1), stator module (3) and cover of establishing on stator module (3) are established to cover on bottom plate (1), stator module (3) are including going up claw-pole (31), go up claw-pole (31) middle part integrated into one piece and have magnetic conduction well pipe (32), magnetic conduction well pipe (32) outer wall cover is equipped with annular concentrated winding (33), upward claw-pole (31) are relative and crisscross to be provided with lower claw-pole (34), lower claw-pole (34) middle part is equipped with flange boss (35), flange boss (35) inner wall cup joints with magnetic conduction well pipe (32), magnetic conduction well pipe (32) outer wall bottom cover is established on bottom plate (1), rotor module (4) cover are established on magnetic conduction well pipe (32).

2. The miniature claw-pole motor structure for improving motor efficiency according to claim 1, wherein the mode of sleeving the inner wall of the flange boss (35) and the magnetic conduction middle tube (32) is interference sleeving or transitional sleeving.

3. The miniature claw-pole motor architecture for improving motor efficiency according to claim 1, wherein the upper claw pole (31), the magnetically conductive middle tube (32) and the lower claw pole (34) are easily punched high magnetic permeability material members.

4. A miniature claw-pole motor architecture for improving motor efficiency according to claim 1, characterized in that the toroidal concentrated winding (33) is looped inside between an upper claw pole (31) and a lower claw pole (34).

5. The miniature claw-pole motor structure for improving motor efficiency according to claim 1, wherein the bottom of the flange boss (35) is abutted to the top of the bottom plate (1), and the bottom of the outer wall of the magnetic conduction middle tube (32) is fixedly sleeved on the bottom plate (1) in a dispensing mode.

6. The miniature claw-pole motor structure for improving motor efficiency according to claim 1, wherein the inner wall of the magnetic conducting middle tube (32) is sleeved with a bearing (41), the rotor assembly (4) comprises a shaft core (42) inserted on the bearing (41), a motor shell (43) arranged at the top of the shaft core (42) and a permanent magnet (48) arranged on the inner wall of the motor shell (43) in a surrounding mode, and the permanent magnet (48) is arranged on the outer side between the upper claw pole (31) and the lower claw pole (34) in a surrounding mode.

7. The miniature claw pole motor structure for improving motor efficiency according to claim 1, wherein a drive IC is arranged at the bottom of the PCB (2), and a HALL sensor is arranged in the drive IC.

8. A fan, characterized by comprising a miniature claw-pole motor structure for improving motor efficiency according to claims 1-7, wherein the rotor assembly (4) is sleeved with an impeller (44), the side wall of the bottom plate (1) is integrally formed with a side frame (11), and the top of the side frame (11) is covered with an upper cover (12).

9. A fan according to claim 8, wherein the impeller (44) is provided with a number of blades (45) in the circumferential direction.

10. A fan according to claim 8, wherein the upper cover (12) is provided with an air inlet (110), and an air outlet (120) is provided at one end between the upper cover (12), the side frame (11) and the bottom plate (1).