Acoustic wave motor with novel structure

Abstract

The utility model discloses a sound wave motor with a novel structure, which belongs to the technical field of sound wave motors and comprises a casing, a rotor assembly is arranged in the casing, two coils which are respectively positioned on the upper side and the lower side of the rotor assembly are further arranged in the casing, the casing comprises two symmetrically arranged stator assemblies, and each stator assembly comprises a plastic casing. The interior of the plastic shell is connected with two stator iron cores which are symmetrical up and down, and the coil sleeves the stator iron cores. The shell of the electric toothbrush comprises the two symmetrically arranged stator assemblies, a radial assembly mode is adopted, the concentricity is better, and the output shaft is located on the center line of the motor, so that the design of the shell of the electric toothbrush is simpler; according to the utility model, the coil is wound by the self-adhesive wire, and the coil can be firstly wound and then sleeved on the stator core, so that the winding of the coil is more convenient.

Description

Technical Field

[0001] The utility model belongs to the technical field of sonic wave motors, and in particular relates to a sonic wave motor with a new structure. Background Art

[0002] Currently, there is a type of asymmetric ultrasonic motor on the market, which has the following structural features: (1) the rotor axis is not on the center line of the motor; (2) it has a square structure; (3) the stator is assembled along the axial direction; (4) the stator consists of a coil wound on an injection molded part with a U-shaped iron core, and the rotor is inside the U-shaped iron core, that is, the stator coil is on one side of the rotor, rather than symmetrically on both sides.

[0003] This design has the advantages of low cost, simple structure, strong vibration and large swing amplitude, but because the shaft is not on the center line of the motor, it brings inconvenience to the design of the electric toothbrush housing. Utility Model Content

[0004] In order to solve the problems raised in the above background technology, the utility model provides a sonic motor with a new structure, which has the characteristics of good concentricity and the shaft is on the center line of the motor.

[0005] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a sonic motor with a new structure, including a casing, a rotor assembly is arranged inside the casing, and two coils are arranged inside the casing, which are respectively located on the upper and lower sides of the rotor assembly. The casing includes two symmetrically arranged stator assemblies, and the stator assembly includes a plastic shell, and the interior of the plastic shell is connected to two stator cores which are symmetrical in upper and lower directions, and the coil is sleeved on the stator core.

[0006] In order to facilitate the assembly of the coil, further, the stator core is an L-shaped structure.

[0007] In order to reduce the number of assembly steps and improve assembly efficiency, the stator core and the plastic shell are further connected by injection molding.

[0008] Furthermore, the rotor assembly includes a skeleton, a magnet is embedded in the skeleton, one end of the skeleton is connected to an output shaft, a rolling bearing is sleeved on the output shaft, and the other end of the skeleton is connected to a spring.

[0009] In order to increase the driving force, further, magnetic conductive sheets are provided on the N and S pole surfaces of the magnet.

[0010] In order to realize the rapid positioning of the magnetic conductive sheet, further, positioning grooves are respectively provided on both ends of the magnetic conductive sheet, and positioning blocks corresponding to the positioning grooves are provided on the frame.

[0011] In order to fix the rolling bearing and the spring sheet, further, a semicircular groove is provided at one end of the plastic shell, and a rectangular groove is provided at the other end of the plastic shell.

[0012] In order to realize the rapid positioning of the two stator assemblies, further, positioning pins and positioning holes distributed in a diagonal line are provided on the inner side surface of the plastic shell.

[0013] Compared with the prior art, the beneficial effects of the utility model are:

[0014] 1. The housing of the utility model includes two symmetrically arranged stator assemblies, which are radially assembled, have better concentricity, and the output shaft is located on the center line of the motor, making the housing design of the electric toothbrush simpler;

[0015] 2. The coil of the utility model is wound with self-adhesive wire, which can be wound first and then put on the stator core, making the winding of the coil more convenient;

[0016] 3. The utility model replaces the traditional metal casing, end cover and stator assembly with a casing, which reduces the assembly process and improves the assembly efficiency;

[0017] 4. The stator core and the plastic shell of the utility model are connected by injection molding, which reduces assembly steps and improves assembly efficiency;

[0018] 5. The inner side surface of the plastic shell of the utility model is provided with diagonally distributed positioning pins and positioning holes, and the two stator components can be quickly positioned through the cooperation of the positioning pins and the positioning holes. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The accompanying drawings are used to provide a further understanding of the present invention and constitute a part of the specification. Together with the embodiments of the present invention, they are used to explain the present invention and do not constitute a limitation of the present invention. In the accompanying drawings:

[0020] Figure 1 It is a schematic diagram of the explosion of the structure of the utility model;

[0021] Figure 2 It is a structural schematic diagram of the casing of the utility model;

[0022] Figure 3 It is a schematic diagram of the structural explosion of the stator assembly of the utility model;

[0023] Figure 4 It is a structural schematic diagram of the stator assembly of the utility model;

[0024] Figure 5 It is a schematic diagram of the structure explosion of the rotor assembly of the utility model;

[0025] Figure 6 It is a structural schematic diagram of the rotor assembly of the utility model;

[0026] Figure 7 It is a cross-sectional structural schematic diagram of the utility model;

[0027] In the figure: 1, coil; 2, housing; 3, rotor assembly; 31, skeleton; 32, output shaft; 33, rolling bearing; 34, positioning block; 35, spring; 36, positioning groove; 37, magnetic conductive sheet; 38, magnet; 4, stator assembly; 41, plastic shell; 42, stator core; 43, semicircular groove; 44, rectangular groove; 45, positioning hole; 46, positioning pin. DETAILED DESCRIPTION

[0028] 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.

[0029] Example 1

[0030] See also Figure 1-7 The utility model provides the following technical solutions: a sonic motor with a new structure, including a casing 2, a rotor assembly 3 is arranged inside the casing 2, and two coils 1 are arranged inside the casing 2, which are respectively located on the upper and lower sides of the rotor assembly 3. The casing 2 includes two symmetrically arranged stator assemblies 4, and the stator assembly 4 includes a plastic shell 41. Two stator cores 42 that are symmetrical in upper and lower directions are connected to the inside of the plastic shell 41, and the coil 1 is sleeved on the stator core 42.

[0031] By adopting the above technical scheme, the casing 2 of the utility model includes two symmetrically arranged stator assemblies 4, which are radially assembled with better concentricity, and the output shaft 32 is located on the center line of the motor, so that the outer shell design of the electric toothbrush is simpler; the coil 1 of the utility model is wound with self-adhesive wire, which can be wound first and then put on the stator core 42, making the winding of the coil 1 more convenient; the utility model replaces the traditional metal casing, end cover and stator assembly with the casing 2, reduces the assembly process and improves the assembly efficiency.

[0032] Specifically, the stator core 42 is an L-shaped structure.

[0033] By adopting the above technical solution, the assembly of the coil 1 is facilitated.

[0034] Specifically, the stator core 42 and the plastic shell 41 are connected by injection molding.

[0035] By adopting the above technical solution, the assembly steps are reduced and the assembly efficiency is improved.

[0036] Specifically, the rotor assembly 3 includes a skeleton 31 made of plastic material. A magnet 38 is embedded inside the skeleton 31 . One end of the skeleton 31 is connected to an output shaft 32 , on which a rolling bearing 33 is sleeved. The other end of the skeleton 31 is connected to a spring 35 .

[0037] By adopting the above technical solution, the magnet 38 is bonded to the frame 31 by glue, and the output shaft 32 and the spring piece 35 are connected to the frame 31 by injection molding or bonding with glue.

[0038] Specifically, a semicircular groove 43 is provided at one end of the plastic shell 41 , and a rectangular groove 44 is provided at the other end of the plastic shell 41 .

[0039] By adopting the above technical solution, the semicircular groove 43 is used to fix the rolling bearing 33 , and the rectangular groove 44 is used to fix the spring piece 35 .

[0040] Example 2

[0041] The present embodiment is different from the first embodiment in that: specifically, magnetic conductive sheets 37 are provided on the N and S pole surfaces of the magnet 38, and the magnetic conductive sheets 37 are bonded to the frame 31 by glue.

[0042] By adopting the above technical solution, the driving force is increased.

[0043] Specifically, positioning grooves 36 are respectively provided on both ends of the magnetic conductive sheet 37 , and positioning blocks 34 corresponding to the positioning grooves 36 are provided on the frame 31 .

[0044] By adopting the above technical solution, the magnetic conductive sheet 37 can be quickly positioned.

[0045] Example 3

[0046] The present embodiment is different from the first embodiment in that: specifically, the inner side surface of the plastic shell 41 is provided with positioning pins 46 and positioning holes 45 distributed in a diagonal line.

[0047] By adopting the above technical solution, the two stator assemblies 4 can be quickly positioned through the cooperation between the positioning pins 46 and the positioning holes 45 .

[0048] In summary, the casing 2 of the utility model includes two symmetrically arranged stator assemblies 4, which are radially assembled with better concentricity, and the output shaft 32 is located on the center line of the motor, making the outer shell design of the electric toothbrush simpler; the coil 1 of the utility model is wound with self-adhesive wire, which can be wound first and then put on the stator core 42, making the winding of the coil 1 more convenient; the utility model replaces the traditional metal casing, end cover and stator assembly with the casing 2, reduces the assembly process and improves the assembly efficiency; the stator core 42 of the utility model is connected to the plastic shell 41 by injection molding, which reduces the assembly steps and improves the assembly efficiency; the inner side of the plastic shell 41 of the utility model is provided with diagonally distributed positioning pins 46 and positioning holes 45, and the two stator assemblies 4 can be quickly positioned by the cooperation of the positioning pins 46 and the positioning holes 45.

[0049] Finally, it should be noted that the above description is only a preferred embodiment of the utility model and is not intended to limit the utility model. Although the utility model is described in detail with reference to the above embodiments, those skilled in the art can still modify the technical solutions recorded in the above embodiments or replace some of the technical features therein by equivalents. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the utility model shall be included in the protection scope of the utility model.

Claims

1. A sonic motor with a new structure, comprising a housing, characterized in that: A rotor assembly is provided inside the casing, and two coils are provided inside the casing, which are respectively located on the upper and lower sides of the rotor assembly. The casing includes two symmetrically arranged stator assemblies, and the stator assembly includes a plastic shell. Two stator cores that are symmetrical in upper and lower directions are connected inside the plastic shell, and the coils are sleeved on the stator cores.

2. The new structure of the sonic motor according to claim 1 is characterized in that: The stator core is an L-shaped structure.

3. The new structure of the sonic motor according to claim 1 is characterized in that: The stator core is connected to the plastic shell by injection molding.

4. The new structure of the sonic motor according to claim 1 is characterized in that: The rotor assembly comprises a skeleton, a magnet is embedded in the skeleton, one end of the skeleton is connected to an output shaft, a rolling bearing is sleeved on the output shaft, and the other end of the skeleton is connected to a spring.

5. The new structure of the sonic motor according to claim 4 is characterized in that: Magnetic conductive sheets are provided on the N and S pole surfaces of the magnet.

6. The new structure of the sonic motor according to claim 5 is characterized in that: Positioning grooves are respectively arranged on both ends of the magnetic conductive sheet, and positioning blocks corresponding to the positioning grooves are arranged on the frame.

7. The new structure of the sonic motor according to claim 1 is characterized in that: One end of the plastic shell is provided with a semicircular groove, and the other end of the plastic shell is provided with a rectangular groove.

8. The new structure of the sonic motor according to claim 1 is characterized in that: The inner side surface of the plastic shell is provided with positioning pins and positioning holes which are distributed in a diagonal line.

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