CN220358897U - Small-size sound wave motor - Google Patents

Abstract

The utility model discloses a small-size acoustic motor, which belongs to the technical field of acoustic motors, and comprises a machine shell, wherein one end of the machine shell is connected with a rear cover, the inner wall of the machine shell is connected with a stator assembly, the stator assembly comprises a framework, two sides of the framework are respectively connected with a stator core, the stator cores are connected with the framework through injection molding, coils are wound on the stator cores, a rotor assembly is arranged in the stator assembly, the rotor assembly comprises a shaft, one end of the shaft is connected with the machine shell through a bearing, the other end of the shaft is connected with the rear cover through a spring piece, the circumference of the shaft is connected with a magnet, the magnet is of a rectangular structure, and the upper side and the lower side of the magnet are connected with metal sheets. According to the utility model, a rotor core is not required, so that radial space is saved, and the production cost is reduced; according to the utility model, the traditional four magnetic shoes are replaced by the rectangular-structure magnet, and the shaft can be directly assembled with the magnet, so that the production cost is reduced.

Description

Small-size sound wave motor

Technical Field

The utility model belongs to the technical field of acoustic motors, and particularly relates to a small-size acoustic motor.

Background

At present, the outer diameters of the acoustic wave motor shells on the market are mainly phi 18 mm and phi 16mm, and the structures of the acoustic wave motor shells are mainly divided into two types: one is provided with 2 bearings, which are expensive and have high cost; the other is that one end is provided with 1 bearing, the other end is provided with a metal spring plate, and the spring plate is axially arranged, and the structure is characterized in that the spring plate is longer (too short and inelastic), so that the rear cover is in a T-shaped design, has a long tail, and has a larger special space in the length direction.

With the popularization of electric toothbrushes, there is an urgent need for a low-cost acoustic motor suitable for children's electric toothbrushes with small dimensions (such as a diameter of Φ12 mm), and if existing designs of Φ18 and Φ16 are adopted, there is a problem of insufficient space.

Disclosure of Invention

To solve the problems set forth in the background art. The utility model provides a small-size acoustic wave motor, which has the characteristics of small size and low cost.

In order to achieve the above purpose, the present utility model provides the following technical solutions: the utility model provides a small-size sound wave motor, which comprises a housing, the one end of casing is connected with the back lid, be connected with stator module on the inner wall of casing, stator module includes the skeleton, the both sides of skeleton are connected with stator core respectively, stator core passes through the injection molding with the skeleton and is connected, the coiling has the coil on the stator core, stator module's inside is equipped with rotor subassembly, rotor subassembly includes the axle, the one end of axle is passed through the bearing and is connected with the casing, the other end of axle is connected with the back lid through the spring leaf, be connected with magnet on the circumference of axle, magnet is rectangular structure, the upper and lower both sides of magnet all are connected with the sheetmetal.

In order to save the axial occupied space of the motor, the spring piece is in a shape of a central symmetry figure

In order to facilitate the connection between the shaft and the spring piece and ensure the stability of the connection, further, the end part of the shaft is provided with a connecting groove, and the spring piece is provided with a positioning groove corresponding to the connecting groove.

In order to facilitate the assembly between the shaft and the magnet, further, a flat cavity is arranged in the magnet, and a flat groove corresponding to the flat cavity is arranged on the shaft.

In order to play the role of axial positioning, in addition, the metal sheet is prevented from falling off, and further, a sleeve pipe positioned at the end part of the magnet is sleeved on the shaft, and two clamping blocks which are vertically symmetrically arranged are integrally formed on the circumference of the sleeve pipe.

In order to be used for holding the spring leaf and fixing the tip of spring leaf, further, be equipped with the groove of dodging that corresponds with the spring leaf on the medial surface of back lid, dodge the inslot and still be equipped with two and be central symmetry's draw-in groove.

In order to be used for leading out of coil end, further, be equipped with two and pass the wire casing corresponding with the coil on the back lid.

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

1. according to the utility model, a rotor core is not required, so that radial space is saved, and the production cost is reduced; according to the utility model, the traditional four magnetic shoes are replaced by the rectangular-structure magnet, and the shaft can be directly assembled with the magnet, so that the production cost is reduced;

2. the metal sheets are respectively stuck on the N/S pole surfaces of the magnets, and play a role in magnetic conduction, and are equivalent to two N pole magnetic shoes and two S pole magnetic shoes, so that the effect of four magnetic shoes is realized;

3. the spring piece is of a bent structure in a shape of a central symmetrical diagram, so that the axial occupied space of the motor is saved;

4. the sleeve at the end part of the magnet is sleeved on the shaft, two clamping blocks which are arranged symmetrically up and down are integrally formed on the circumference of the sleeve, the sleeve can play a role in axial positioning, in addition, the two clamping blocks are respectively clamped at the outer sides of the metal sheets, and the metal sheets can be prevented from falling off;

5. the inside of the framework is provided with a limiting groove corresponding to the clamping block, and the clamping block is matched with the limiting groove to limit the maximum rotation angle of the rotor.

Drawings

The accompanying drawings are included to provide a further understanding of the utility model and are incorporated in and constitute a part of this specification, illustrate the utility model and together with the embodiments of the utility model, serve to explain the utility model. In the drawings:

FIG. 1 is a schematic diagram of an explosion of a structure of the present utility model;

FIG. 2 is a schematic view of a rotor assembly according to the present utility model;

FIG. 3 is a schematic view of a spring plate according to the present utility model;

FIG. 4 is a schematic view of a rotor assembly according to the present utility model;

FIG. 5 is a schematic view of a magnet according to the present utility model;

FIG. 6 is a schematic view of the structure of the shaft of the present utility model;

FIG. 7 is a schematic view of a stator assembly according to the present utility model;

FIG. 8 is a schematic structural view of the framework of the present utility model;

FIG. 9 is a schematic view of the structure of the sleeve of the present utility model;

FIG. 10 is a schematic view of the structure of the rear cover of the present utility model;

in the figure: 1. a bearing; 2. a housing; 3. a stator assembly; 31. a skeleton; 311. a limit groove; 32. a stator core; 33. a coil; 4. a rotor assembly; 41. a shaft; 411. a flat groove; 412. a connecting groove; 42. a metal sheet; 43. a magnet; 431. a flat cavity; 44. a sleeve; 441. clamping blocks; 5. a spring piece; 51. a positioning groove; 6. a rear cover; 61. wire passing grooves; 62. a clamping groove; 63. avoiding the groove.

Detailed Description

The following description of the embodiments of the present utility model will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present utility model, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.

Example 1

Referring to fig. 1-10, the present utility model provides the following technical solutions: the utility model provides a small-size sound wave motor, including casing 2, the one end of casing 2 is connected with back lid 6, be connected with stator module 3 on the inner wall of casing 2, stator module 3 includes skeleton 31, the both sides of skeleton 31 are connected with stator core 32 respectively, stator core 32 is connected through moulding plastics with skeleton 31, the last coiling of stator core 32 has coil 33, the inside of stator module 3 is equipped with rotor subassembly 4, rotor subassembly 4 includes axle 41, the one end of axle 41 is connected with casing 2 through bearing 1, the other end of axle 41 is connected with back lid 6 through spring leaf 5, be connected with magnet 43 on the circumference of axle 41, magnet 43 is rectangular structure, the N/S utmost point of magnet 43 pastes respectively on the surface has sheetmetal 42.

By adopting the technical scheme, the utility model does not need to use a rotor core, saves radial space and reduces production cost; according to the utility model, the magnet 43 with a rectangular structure replaces the traditional four magnetic shoes, and the shaft 41 can be directly assembled with the magnet 43, so that the production cost is reduced; the metal sheets 42 are respectively stuck on the N/S pole surfaces of the magnets 43, and the metal sheets 42 play a role in magnetic conduction, are equivalent to two N pole magnetic shoes and two S pole magnetic shoes, and realize the effect of four magnetic shoes.

Specifically, the spring piece 5 has a curved structure having a shape of a centrosymmetric figure.

By adopting the technical scheme, the axial occupied space of the motor is saved.

Specifically, the end of the shaft 41 is provided with a connecting groove 412, and the spring piece 5 is provided with a positioning groove 51 corresponding to the connecting groove 412.

By adopting the above technical scheme, the connection between the shaft 41 and the spring piece 5 is facilitated, and the stability of the connection is ensured.

Specifically, the magnet 43 has a flat cavity 431 formed therein, the N/S pole of the magnet 43 is perpendicular to the plane of the flat cavity 431, and the shaft 41 has a flat slot 411 corresponding to the flat cavity 431.

By adopting the above technical solution, the assembly between the shaft 41 and the magnet 43 is facilitated.

Example 2

This embodiment differs from embodiment 1 in that: specifically, a sleeve 44 located at the end of the magnet 43 is sleeved on the shaft 41, and two clamping blocks 441 which are vertically symmetrically arranged are integrally formed on the circumference of the sleeve 44.

By adopting the above technical scheme, the sleeve 44 can play an axial positioning role, and in addition, the two clamping blocks 441 are respectively clamped on the outer sides of the metal sheets 42, so that the metal sheets 42 can be prevented from falling off.

Specifically, the inside of the skeleton 31 is provided with a limit groove 311 corresponding to the clamping block 441.

By adopting the technical scheme, the clamping block 441 and the limiting groove 311 are matched to limit the maximum rotation angle of the rotor.

Example 3

This embodiment differs from embodiment 1 in that: specifically, the inner side surface of the rear cover 6 is provided with an avoidance groove 63 corresponding to the spring piece 5, and two centrally symmetrical clamping grooves 62 are further arranged in the avoidance groove 63.

Through adopting above-mentioned technical scheme, dodge the groove 63 and be used for holding spring leaf 5, draw-in groove 62 is used for fixing the tip of spring leaf 5.

Specifically, the rear cover 6 is provided with two wire passing grooves 61 corresponding to the coils 33.

By adopting the technical scheme, the device is used for leading out coil ends.

In summary, the utility model does not need to use a rotor core, thereby saving radial space and reducing production cost; according to the utility model, the magnet 43 with a rectangular structure replaces the traditional four magnetic shoes, and the shaft 41 can be directly assembled with the magnet 43, so that the production cost is reduced; the metal sheets 42 are respectively stuck on the N/S pole surfaces of the magnets 43, and the metal sheets 42 play a role in magnetic conduction and are equivalent to two N pole magnetic shoes and two S pole magnetic shoes, so that the effect of four magnetic shoes is realized; the spring piece 5 is of a bent structure in a shape of a central symmetry diagram, so that the axial occupied space of the motor is saved; the sleeve 44 positioned at the end part of the magnet 43 is sleeved on the shaft 41, two clamping blocks 441 which are vertically and symmetrically arranged are integrally formed on the circumference of the sleeve 44, the sleeve 44 can play a role in axial positioning, in addition, the two clamping blocks 441 are respectively clamped at the outer side of the metal sheet 42, and the metal sheet 42 can be prevented from falling off; the inside of the framework 31 is provided with a limiting groove 311 corresponding to the clamping block 441, and the clamping block 441 and the limiting groove 311 are matched to limit the maximum rotation angle of the rotor.

Finally, it should be noted that: the foregoing description is only a preferred embodiment of the present utility model, and the present utility model is not limited thereto, but it is to be understood that modifications and equivalents of some of the technical features described in the foregoing embodiments may be made by those skilled in the art, although the present utility model has been described in detail with reference to the foregoing embodiments. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present utility model should be included in the protection scope of the present utility model.

Claims (8)

1. A small-sized acoustic wave motor comprising a housing, characterized in that: one end of the shell is connected with a rear cover, a stator assembly is connected to the inner wall of the shell, a rotor assembly is arranged in the stator assembly, the rotor assembly comprises a shaft, one end of the shaft is connected with the shell through a bearing, the other end of the shaft is connected with the rear cover through a spring piece, a magnet is connected to the circumference of the shaft, the magnet is of a rectangular structure, and metal sheets are connected to the upper side and the lower side of the magnet.

2. A small-sized acoustic wave motor according to claim 1, wherein: the stator assembly comprises a framework, two sides of the framework are respectively connected with a stator core, the stator cores are connected with the framework through injection molding, and coils are wound on the stator cores.

3. A small-sized acoustic wave motor according to claim 1, wherein: the spring piece is of a bent structure in a shape of a central symmetry diagram.

4. A small-sized acoustic wave motor according to claim 1, wherein: the end of the shaft is provided with a connecting groove, and the spring piece is provided with a positioning groove corresponding to the connecting groove.

5. A small-sized acoustic wave motor according to claim 1, wherein: the magnet is internally provided with a flat cavity, and the shaft is provided with a flat groove corresponding to the flat cavity.

6. A small-sized acoustic wave motor according to claim 1, wherein: the sleeve at the end of the magnet is sleeved on the shaft, and two clamping blocks which are arranged symmetrically up and down are integrally formed on the circumference of the sleeve.

7. A small-sized acoustic wave motor according to claim 1, wherein: the inner side surface of the rear cover is provided with an avoidance groove corresponding to the spring piece, and two clamping grooves which are centrosymmetric are also arranged in the avoidance groove.

8. A small-sized acoustic wave motor according to claim 1, wherein: the rear cover is provided with two wire passing grooves corresponding to the coils.