CN214674817U

CN214674817U - Brushless sound wave motor and electric toothbrush

Info

Publication number: CN214674817U
Application number: CN202120810628.3U
Authority: CN
Inventors: 周拾金
Original assignee: Zhejiang Dongyang Dongci Chengji Electronics Co Ltd
Current assignee: Zhejiang Dongyang Dongci Chengji Electronics Co Ltd
Priority date: 2021-04-20
Filing date: 2021-04-20
Publication date: 2021-11-09
Anticipated expiration: 2031-04-20

Abstract

The utility model relates to a brushless sound wave motor technical field discloses a brushless sound wave motor and electric toothbrush. This brushless sound wave motor includes casing, stator and rotor, the stator set firmly in casing inner wall, the stator includes the fixed frame of iron core, two iron cores and two coils, the bar through-hole has been seted up respectively on the relative both sides wall of the fixed frame of iron core, two the iron core sets up relatively, one the part of iron core set firmly in the fixed frame of iron core, another part is outstanding one the bar through-hole sets up, two the coil all is the annular, every the coil corresponds the cover and locates one the outstanding part of iron core, the rotor is worn to locate in the fixed frame of iron core, and the part stretches out the casing sets up. The brushless sound wave is simple to process and low in cost; the winding is convenient, and the magnetic field stability is better. The electric toothbrush comprises the brushless sound wave motor, and the electric toothbrush is stable in performance.

Description

Brushless sound wave motor and electric toothbrush

Technical Field

The utility model relates to a sound wave motor technical field especially relates to a brushless sound wave motor and electric toothbrush.

Background

In recent years, with the popularity and popularity of electric toothbrushes, the design of a sound wave motor that generates vibrations is critical as a main component of the electric toothbrushes, and there are many manufacturers and various designs for producing the sound wave motor. However, the technology is not completely mature, the design of the acoustic wave motor has defects, and the coil winding excircle of the existing acoustic wave motor is sealed in the iron core, so that the winding is difficult, the winding is not neat, the magnetic field is influenced, and the performance stability is poor. In addition, most of the existing sound wave motors are designed with a large number of parts and a large number of production processes, so that the production cost is high, and the cost is reduced along with the improvement of the yield.

SUMMERY OF THE UTILITY MODEL

Based on the above, the utility model aims to provide a brushless sound wave motor and an electric toothbrush, which are simple to process and low in cost; the winding is convenient, and the magnetic field stability is better; and the electric toothbrush has stable performance.

In order to achieve the purpose, the utility model adopts the following technical proposal:

a brushless acoustic wave motor comprising:

a housing;

the stator is fixedly arranged on the inner wall of the shell and comprises an iron core fixing frame, two iron cores and two coils, strip-shaped through holes are respectively formed in two opposite side walls of the iron core fixing frame, the two iron cores are oppositely arranged, one part of one iron core is fixedly arranged in the iron core fixing frame, the other part of the iron core protrudes out of one strip-shaped through hole, the two coils are annular, and each coil is correspondingly sleeved on the protruding part of one iron core;

and the rotor penetrates through the iron core fixing frame, and part of the rotor extends out of the shell.

As a preferred scheme of the brushless sound wave motor, the iron core fixing frame is injection molded, and the iron core is injection molded on the iron core fixing frame.

As a preferred scheme of the brushless acoustic motor, the coil is made of self-adhesive enameled wires.

As a preferable aspect of the brushless acoustic motor, the brushless acoustic motor further includes:

the front cover and the rear cover are respectively covered at two ends of the shell;

the two rolling bearings are respectively embedded in the front cover and the rear cover, two ends of the rotor are respectively connected to the front cover and the rear cover through one rolling bearing, and one end of the rotor protrudes out of the front cover.

As a preferred scheme of the brushless sound wave motor, two wire holes are formed in the rear cover, and a wire head of one coil penetrates through one wire hole to be connected with an external power supply.

As a preferable aspect of the brushless acoustic wave motor, the rotor includes:

the rotating shaft comprises an inner section and an outer section which are connected, the inner section penetrates through the iron core fixing frame, and the outer section extends out of the shell;

the two magnetic shoe fixing sleeves are fixedly arranged on the inner section at intervals and are respectively positioned at two ends of the iron core fixing frame;

one end of each magnetic tile is connected with one magnetic tile fixing sleeve, and the other end of each magnetic tile is connected with the other magnetic tile fixing sleeve.

As a preferred scheme of the brushless sound wave motor, two ends of the iron core fixing frame are respectively provided with a limiting opening;

and the two magnetic shoe fixing sleeves are respectively provided with a limiting convex point, and the limiting convex points can be partially abutted against the side wall of the limiting port so as to limit the rotating angle of the rotating shaft.

As a preferred scheme of the brushless sound wave motor, the magnetic shoe fixing sleeve is formed by injection molding, and the magnetic shoe fixing sleeve is sleeved on the rotating shaft by injection molding.

As a preferable scheme of the brushless sound wave motor, four magnetic shoes are provided, and the four magnetic shoes are spaced and uniformly distributed along the circumferential direction of the rotating shaft.

An electric toothbrush comprises the brushless sound wave motor.

The utility model has the advantages that:

the utility model provides a brushless sound wave motor, this brushless sound wave motor includes the casing, stator and rotor, the stator sets firmly inside the casing, the stator includes the fixed frame of iron core, two iron cores and two coils, the bar through-hole has been seted up on the relative both sides wall of the fixed frame of iron core respectively, two iron cores set up relatively, the part of an iron core sets firmly in the fixed frame of iron core, bar through-hole setting of another part salient, two coils all are the annular, every coil corresponds the cover and establishes the salient at an iron core, the rotor is worn to establish in the fixed frame of iron core, and the casing setting is stretched out in the part, when the coil circular telegram, the stator is motionless, the rotor rotates under the magnetic field effect. Because a part of the iron core is fixed in the iron core fixing frame and a part of the iron core protrudes out of the strip-shaped through hole, the coil can be directly sleeved on the protruding part of the iron core after being wound into a ring shape in advance. The brushless sound wave motor is convenient to process, simple in process and low in cost; and the problems of difficult coil winding and disordered wiring are solved, so that the magnetic field is more stable, and the performance of the brushless sound wave motor is stable.

The utility model also provides an electric toothbrush, this electric toothbrush include foretell brushless sound wave motor, and manufacturing cost is lower, the stable performance.

Drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings required to be used in the description of the embodiments of the present invention will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the contents of the embodiments of the present invention and the drawings without creative efforts.

Fig. 1 is a schematic view of an overall assembly structure of a brushless acoustic motor according to an embodiment of the present invention;

fig. 2 is an overall assembled sectional view of a brushless acoustic motor according to an embodiment of the present invention;

fig. 3 is a schematic diagram illustrating an internal structure of a brushless acoustic motor according to an embodiment of the present invention;

fig. 4 is an exploded view of a brushless acoustic motor according to an embodiment of the present invention;

fig. 5 is a schematic structural diagram of a rear cover of a brushless acoustic motor according to an embodiment of the present invention.

In the figure:

1. a housing;

2. a stator; 21. an iron core fixing frame; 22. an iron core; 23. a coil; 211. a strip-shaped through hole; 212. a limiting port;

3. a rotor; 31. a rotating shaft; 32. fixing a magnetic shoe sleeve; 33. a magnetic shoe; 321. limiting salient points;

4. a front cover; 5. a rear cover; 51. a wire hole; 6. a rolling bearing.

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings and examples. It is to be understood that the specific embodiments described herein are merely illustrative of the invention and are not limiting of the invention. It should be further noted that, for the convenience of description, only some of the structures related to the present invention are shown in the drawings, not all of the structures.

In the description of the present invention, unless expressly stated or limited otherwise, the terms "connected," "connected," and "fixed" are to be construed broadly, e.g., as meaning permanently connected, detachably connected, or integral to one another; can be mechanically or electrically connected; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.

In the present disclosure, unless expressly stated or limited otherwise, the first feature "on" or "under" the second feature may comprise direct contact between the first and second features, or may comprise contact between the first and second features not directly. Also, the first feature being "on," "above" and "over" the second feature includes the first feature being directly on and obliquely above the second feature, or merely indicating that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature includes the first feature being directly under and obliquely below the second feature, or simply meaning that the first feature is at a lesser elevation than the second feature.

In the description of the present embodiment, the terms "upper", "lower", "left", "right", and the like are used in the orientation or positional relationship shown in the drawings only for convenience of description and simplicity of operation, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed in a specific orientation, and be operated, and thus should not be construed as limiting the present invention. Furthermore, the terms "first" and "second" are used only for descriptive purposes and are not intended to have a special meaning.

As shown in fig. 1 to 4, the present embodiment provides a brushless sound wave motor, which includes a housing 1, a stator 2 and a rotor 3, the stator 2 is fixedly disposed on an inner wall of the housing 1, the stator 2 includes a fixed frame 21 of an iron core, two iron cores 22 and two coils 23, bar-shaped through holes 211 are respectively disposed on two opposite side walls of the fixed frame 21 of the iron core, the two iron cores 22 are disposed oppositely, a part of one iron core 22 is fixedly disposed in the fixed frame 21 of the iron core, another part of the other part protrudes one bar-shaped through hole 211, the two coils 23 are both annular, each coil 23 is correspondingly sleeved on a protruding part of one iron core 22, and the rotor 3 is disposed in the fixed frame 21 of the iron core, and a part of the rotor extends out of the housing 1. When the coil 23 is energized, the stator 2 is stationary and the rotor 3 is rotated by the magnetic field. Since the iron core 22 is partially fixed in the iron core fixing frame 21 and partially protrudes from the strip-shaped through hole 211, the coil 23 can be directly sleeved on the protruding portion of the iron core 22 after being wound into a ring shape in advance. The brushless sound wave motor is convenient to process, simple in process and low in cost; and the problems of difficult winding and disordered wiring of the coil 23 are solved, so that the magnetic field is more stable, and the performance of the brushless sound wave motor is stable.

Preferably, the coil 23 is a self-adhesive enameled wire. The self-adhesive enameled wire enables the manufacturing of the coil 23 to be simple and easy, and the wound coil 23 can be bonded and formed after being heated or treated by solvent. The coil 23 is wound and then adhered to the protruding portion of the core 22, the stator 2 is integrally inserted into the housing 1, and finally the stator 2 is fixed in the housing 1 by using adhesive dispensing. Make coil 23 firm like this, be difficult for rocking, also make stator 2 firm, be difficult for rocking, guarantee brushless sound wave motor's operation stable.

In the present embodiment, the housing 1 is rectangular, and the fixing frame 21 for the iron core 22 is also rectangular. Of course, in other embodiments, the casing 1 and the fixing frame 21 of the core 22 may have other shapes, such as a polygon or a circle, and the description thereof is omitted. Preferably, the housing 1 is made of metal material, and is formed by punching, so that the manufacturing cost is low. Illustratively, the width of the casing 1 is 14mm, the height is 11mm and the length is 34.6mm, however, in other embodiments, the size of the casing 1 can be set according to actual conditions.

In this embodiment, iron core 22 comprises arc iron core and strip column iron core, and the inside wall at the fixed frame 21 of iron core is established to arc iron core, the fixed connection of being convenient for, strip column iron core suddenly establish strip-shaped through-hole 211, the coil 23 cover of being convenient for is established. Of course, in other embodiments, the core 22 may be other shapes. Preferably, the core fixing frame 21 is injection molded, and the core 22 is injection molded on the core fixing frame 21. The processing is simple, the injection molding is used for fixing the iron core 22 and the iron core fixing frame 21, so that the structure is firm, the size is stable, and the assembly process is reduced.

Specifically, brushless sound wave motor still includes protecgulum 4, hou gai 5 and two antifriction bearing 6, and protecgulum 4 and hou gai 5 are covered respectively and are fitted the both ends of casing 1, preferably fix at casing 1 both ends through the riveting mode, and two antifriction bearing 6 are inlayed respectively and are located protecgulum 4 and hou gai 5, and the both ends of rotor 3 are connected in protecgulum 4 and hou gai 5 through a antifriction bearing 6 respectively, and the outstanding protecgulum 4 setting of one end of rotor 3. The front cover 4, the rear cover 5 and the machine shell 1 form a closed space, and the stator 2 is fixed in the closed space, so that the structure is compact, and the parts run safely; and it is convenient to provide the rolling bearing 6, by which the rotor 3 smoothly rotates. More specifically, as shown in fig. 5, two wire holes 51 are formed in the front cover 4, and a wire end of one coil 23 is correspondingly inserted through one wire hole 51 to connect to an external power source. After the coil 23 passes through the wire hole 51, dispensing and reinforcing are carried out at the position of the wire hole 51, so that the influence of unstable coil 23 caused by shaking of the wire head of the coil 23 on the magnetic field is avoided; meanwhile, external water drops or dust and the like can be prevented from entering the closed space to influence the internal structure.

Preferably, the front cover 4 and the rear cover 5 are made of plastic.

Further, the rotor 3 comprises a rotating shaft 31, two magnetic shoe fixing sleeves 32 and magnetic shoes 33, the rotating shaft 31 comprises an inner section and an outer section which are connected, the inner section penetrates through the iron core fixing frame 21, specifically, two ends of the inner section are respectively connected to the front cover 4 and the rear cover 5 through a rolling bearing 6, and the outer section extends out of the casing 1; the two magnetic shoe fixing sleeves 32 are fixedly arranged on the inner section at intervals, the two magnetic shoe fixing sleeves 32 are respectively positioned at two ends of the iron core fixing frame 21, one end of each magnetic shoe 33 is connected to one magnetic shoe fixing sleeve 32, and the other end of each magnetic shoe 33 is connected to the other magnetic shoe fixing sleeve 32. Illustratively, the number of the magnetic shoes 33 is 4, wherein there are 2N pole magnetic shoes 33 and 2S pole magnetic shoes 33, and the 4 magnetic shoes 33 are spaced and uniformly distributed along the circumference of the rotating shaft 31. With the above structure, after the coils 23 are energized, a magnetic field is formed between the two coils 23, and the magnetic shoe 33 moves under the magnetic force of the magnetic field, thereby driving the rotating shaft 31 to rotate. The magnetic shoe fixing sleeve 32 is directly fixedly arranged on the rotating shaft 31, the magnetic shoe 33 is fixedly connected with the rotating shaft 31 through the magnetic shoe fixing sleeve 32, an iron core special for the magnetic shoe 33 is omitted, the rotating shaft 31 does not need to be changed in diameter, namely the outer diameter of the inner section and the outer section of the rotating shaft 31 are always consistent in shape, the size of the part of the rotating shaft 31 connected with the toothbrush is slightly different, the processing cost is reduced, and the quality of the brushless sound wave motor is improved.

Specifically, two ends of the iron core fixing frame 21 are respectively provided with a notch to form a limiting opening 212, the two magnetic shoe fixing sleeves 32 are respectively provided with a limiting protruding point 321, and the limiting protruding points 321 can partially abut against the side wall of the limiting opening 212 to limit the rotation angle of the rotating shaft 31. When the magnetic shoe 33 rotates under the action of magnetic force, the rotating shaft 31 is driven to rotate, when the magnetic shoe rotates to a certain angle, the limiting convex point 321 partially abuts against the side wall of the limiting opening 212, namely, the side wall of the limiting opening 212 blocks the limiting convex point 321, so that the rotating shaft 31 is blocked from continuing to rotate, the rotating shaft 31 can only rotate between the two opposite side walls of the limiting opening 212, and 360-degree rotation of the rotating shaft 31 is avoided.

Preferably, the magnetic shoe fixing sleeve 32 is formed by injection molding, and the magnetic shoe fixing sleeve 32 is sleeved on the rotating shaft 31 by injection molding. The magnetic shoe 33 is not easy to fall off by fixing the magnetic shoe fixing sleeve 32 and the rotating shaft 31 through injection molding, and the performance and the service life of the rotor 3 are improved.

The present embodiments also provide an electric toothbrush comprising the brushless acoustic wave described above. By using the brushless sound wave motor, the structure is simple, the production is convenient, the cost is lower, and the performance is stable.

It should be noted that the foregoing is only a preferred embodiment of the present invention and the technical principles applied. It will be understood by those skilled in the art that the present invention is not limited to the particular embodiments described herein, but is capable of various obvious changes, rearrangements and substitutions as will now become apparent to those skilled in the art without departing from the scope of the invention. Therefore, although the present invention has been described in greater detail with reference to the above embodiments, the present invention is not limited to the above embodiments, and may include other equivalent embodiments without departing from the scope of the present invention.

Claims

1. A brushless acoustic motor, comprising:

a housing (1);

the stator (2) is fixedly arranged on the inner wall of the machine shell (1), the stator (2) comprises an iron core fixing frame (21), two iron cores (22) and two coils (23), strip-shaped through holes (211) are respectively formed in two opposite side walls of the iron core fixing frame (21), the two iron cores (22) are oppositely arranged, one part of one iron core (22) is fixedly arranged in the iron core fixing frame (21), the other part of the one iron core is protruded with one strip-shaped through hole (211), the two coils (23) are both annular, and each coil (23) is correspondingly sleeved on the protruded part of one iron core (22);

and the rotor (3) penetrates through the iron core fixing frame (21) and partially extends out of the casing (1).

2. The brushless acoustic motor of claim 1, wherein the core holder frame (21) is injection molded, and the core (22) is injection molded on the core holder frame (21).

3. The brushless acoustic motor according to claim 1, wherein the coils (23) are self-adhesive enameled wires.

4. The brushless acoustic motor of claim 1, further comprising:

the front cover (4) and the rear cover (5) are respectively covered at two ends of the machine shell (1);

two antifriction bearings (6), inlay respectively and locate protecgulum (4) with back lid (5), the both ends of rotor (3) are respectively through one antifriction bearing (6) connect in protecgulum (4) with back lid (5), just the one end of rotor (3) is outstanding protecgulum (4) set up.

5. The brushless acoustic motor according to claim 4, wherein the rear cover (5) has two wire holes (51), and a wire end of one of the coils (23) is inserted into one of the wire holes (51) to connect to an external power source.

6. The brushless acoustic motor according to claim 1, wherein the rotor (3) comprises:

the rotating shaft (31) comprises an inner section and an outer section which are connected, the inner section penetrates through the iron core fixing frame (21), and the outer section extends out of the casing (1);

the two magnetic shoe fixing sleeves (32) are fixedly arranged on the inner section at intervals, and the two magnetic shoe fixing sleeves (32) are respectively positioned at two ends of the iron core fixing frame (21);

one end of each magnetic tile (33) is connected to one magnetic tile fixing sleeve (32), and the other end of each magnetic tile is connected to the other magnetic tile fixing sleeve (32).

7. The brushless acoustic motor according to claim 6, wherein the core fixing frame (21) has limiting openings (212) formed at both ends thereof;

two be provided with spacing bump (321) on the fixed cover of magnetic shoe (32) respectively, spacing bump (321) can part butt in the lateral wall of spacing mouth (212) to the restriction the rotation angle of pivot (31).

8. The brushless acoustic motor as claimed in claim 6, wherein the magnetic shoe retaining sleeve (32) is injection molded, and the magnetic shoe retaining sleeve (32) is injection molded around the shaft (31).

9. The brushless acoustic motor according to claim 6, wherein the magnetic shoes (33) are provided in four, and the four magnetic shoes (33) are spaced and uniformly distributed in a circumferential direction of the rotating shaft (31).

10. An electric toothbrush comprising a brushless acoustic motor according to any of claims 1 to 9.