CN212969400U

CN212969400U - Improved structure type sound wave motor

Info

Publication number: CN212969400U
Application number: CN202021527692.2U
Authority: CN
Inventors: 徐小龙
Original assignee: Dongguan Silver Magnetic Magnetic Material Co ltd
Current assignee: Dongguan Silver Magnetic Magnetic Material Co ltd
Priority date: 2020-07-28
Filing date: 2020-07-28
Publication date: 2021-04-13
Anticipated expiration: 2030-07-28

Abstract

The utility model belongs to the technical field of micro motors, in particular to a sound wave motor with an improved structure, which comprises a shell, a linkage shaft and a radial driving device for driving the linkage shaft to rotate around the axis of the linkage shaft; the universal driving device comprises a plastic tailstock sleeved with the opening end of the shell, a telescopic shaft, two magnets and an electromagnet, wherein the telescopic shaft is arranged at the end part of the universal driving shaft and is rotatably connected with the end part of the universal driving shaft, the two magnets are perpendicular to the axial direction of the telescopic shaft and have opposite polarities, the electromagnet is arranged at a certain distance from the two magnets and is arranged on the plastic tailstock, the electromagnet and the plastic tailstock are in telescopic motion by generating magnetic induction lines which are alternately changed and generating opposite attraction or same repulsion with the magnets, and the universal driving device drives the universal driving shaft to synchronously stretch. The utility model discloses realize the existing gyration wobbling high-frequency vibration of universal driving shaft output, have flexible high-frequency vibration again, promote effect, efficiency, the experience sense etc. of personal care health care product by a wide margin.

Description

Improved structure type sound wave motor

Technical Field

The utility model belongs to the technical field of micro motor, especially, relate to a structure improved generation sound wave motor.

Background

The acoustic wave motor is an electromagnetic device which realizes electric energy conversion or transmission according to an electromagnetic induction law. In a common sound wave motor in the market, two groups of coils of a common stator assembly are connected in an electric mode in a direct connection mode, and a magnetic field generated by the two groups of coils after being electrified interacts with a fixed magnetic field of a magnet, so that the rotor assembly generates high-frequency vibration in a shell in a circulating motion mode. The acoustic wave motor mainly functions to generate driving torque and can be used as a power source of electric appliances or various machines.

With the increasing importance of life quality, personal care products such as electric toothbrushes, electric face cleaners, electric nail polishers, electric massagers and the like are becoming more and more popular. The personal care health care product is connected to the output shaft end of the sound wave motor, after the sound wave motor is electrified, the sound wave motor can circularly move to generate high-frequency vibration under the control of the control circuit, and then the personal care health care product is driven to generate high-frequency vibration, so that the aims of nursing and health care are fulfilled. However, the vibration at the output end of the acoustic wave motor in the prior art is high-frequency vibration only in one direction of the output shaft, and usually high-frequency vibration is generated in the radial direction of the output shaft, so that a personal care health product using the acoustic wave motor as a power source has better care and health care effects only at local point positions, and other local point positions need to be realized by means of external force, for example, local point positions of needed care and health care are changed by manually moving, but in the moving process, the moving direction of the personal care product does not have a high-frequency state, so that the effects in the whole care and health care process are reduced, and the use experience of customers is reduced. The search for a new structure of high-efficiency, low-cost acoustic wave motor is an urgent research topic.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a institutional advancement type sound wave motor aims at solving the sound wave motor among the prior art and only in the high frequency vibrations of a direction of its output and bring its as personal care, health products power supply have the technical problem that the effect is poor, the efficiency is low, experience feels poor etc..

In order to achieve the above object, an embodiment of the present invention provides a structurally improved sound wave motor, including an end open-ended housing, a linkage shaft passing through the other end of the housing and movably connected to the housing, and a radial driving device surrounding the linkage shaft, wherein the radial driving device is arranged in an inner cavity of the housing and drives the linkage shaft to rotate around an axis of the linkage shaft. The structure design realizes the rotation function of the universal driving shaft.

Optionally, be located shell opening side be equipped with axial drive arrangement on the universal driving shaft, this axial drive arrangement include with the plastic tailstock that the shell open end cup jointed, locate universal driving shaft tip and rather than rotate the telescopic shaft of being connected, perpendicular and this telescopic shaft axis direction and two magnets opposite in polarity and with this two magnet interval certain distance set up and locate electromagnet on the plastic tailstock, the electromagnet through alternate magnetic induction line, with magnet produces the effect that opposite poles attract or like poles repel each other and realizes the telescopic shaft for telescopic motion is made to the plastic tailstock, drives the universal driving shaft for synchronous telescopic motion is made to the shell. The structure design realizes the telescopic function of the universal driving shaft.

Optionally, wear-resistant rings arranged coaxially are fixedly arranged on the outer shell and the plastic tailstock respectively, one ends of the linkage shaft and the telescopic shaft penetrate through the wear-resistant rings arranged correspondingly respectively, and the other ends of the linkage shaft and the telescopic shaft are connected coaxially in a rotating manner, so that the linkage shaft and the telescopic shaft are movably connected with the wear-resistant rings arranged correspondingly.

Optionally, return springs are respectively sleeved at the ends of the linkage shaft and the telescopic shaft close to the wear-resistant ring, and the telescopic shaft and the radial driving device are arranged between the two return springs. The structural design has the function of facilitating the axial resetting of the linkage shaft.

Optionally, a Z-shaped elastic sheet is arranged at the end of the telescopic shaft far away from the output end of the telescopic shaft, and the Z-shaped elastic sheet is fixedly connected with the plastic tailstock. The structural design has the function of facilitating the axial resetting of the linkage shaft.

Optionally, the magnet is a powerful magnet. The structure design strengthens the power of the extension of the universal driving shaft.

Optionally, the radial driving device comprises a rotor assembly with a magnetic material inside and a stator assembly wrapping the rotor assembly; the stator assembly comprises a stator core wrapping the rotor assembly and a coil wound on the stator core, and the stator assembly drives the rotor assembly to rotate in a reciprocating mode in a preset amplitude through interaction of magnetic transformation and magnetic materials of the rotor assembly.

Optionally, the rotor assembly includes the universal driving shaft, a rotor core sleeved on the universal driving shaft, and two sets of magnetic stripe groups symmetrically disposed on the arc surface of the rotor core, where each magnetic stripe group includes two magnetic stripes with opposite magnetism. The structure design realizes the reciprocating rotation of the linkage shaft at a preset angle through the interaction of the two magnetic strips with opposite magnetism and the stator component with changed magnetism.

Optionally, the stator core is formed by two sets of split stators symmetrically arranged, and a cross section of each split stator is of an E-shaped structure and is arranged in interval correspondence with the magnetic stripe set. This structural design can provide a larger installation space for the stator assembly.

Optionally, the coils are two groups, and the two groups of coils are respectively arranged on pole teeth of the separated stator, and the pole teeth are located at the middle line position of the magnetic strip group at the corresponding position. The structural design realizes the stability of the universal driving shaft in the rotation process.

Optionally, the horizontal plane joints of the two sets of split stators are fixed by welding. This structural design makes stator core overall structure more firm.

The embodiment of the utility model provides an above-mentioned one or more technical scheme in the institutional advancement type sound wave motor have one of following technological effect at least:

1. adopt the telescopic shaft is located the universal driving shaft tip just rather than rotate and be connected, two magnet perpendicular with telescopic shaft axis direction sets up and polarity is opposite, the both sides face of telescopic shaft sets up at certain distance interval respectively the electro-magnet, the electro-magnet inlays the dress and locates the plastic tailstock, when input pulse change current, the electro-magnet magnetic field takes place alternate, with the effect that magnet produced opposite poles and attracts each other or like poles repel each other realizes the telescopic shaft is relative to the plastic tailstock is concertina movement, drives promptly the universal driving shaft is for the shell is concertina movement, in addition radial drive arrangement drive the universal driving shaft rotates around its axis, thereby realizes the output of universal driving shaft has not only gyration wobbling high frequency vibration, has flexible high frequency vibration again, has promoted by a wide margin the effect of the personal care health care product installed in the universal driving shaft output, Efficacy, experience, etc.

2. The stator core is formed by two groups of separated stators which are symmetrically arranged, the section of each separated stator is of an E-shaped structure, the structure is compact, larger installation space is convenient to provide, and the occupied size can be more miniaturized; in addition, the horizontal plane joints of the two groups of separated stators are fixed by welding, so that the whole structure of the stator core is more stable.

3. The coil is wound on the pole teeth of the separated stator, the length of the arc side of the coil exceeds the rotor core, the coil is not in a traditional right-angle shape, and large arc transition is arranged on two sides of the coil, so that the power of the radial driving device is stronger, and the high-frequency vibration effect of rotary swing is further enhanced; in addition, adopt sticky mode after the coil wire winding is accomplished with stator core is fixed for the cost is lower, and the noise is lower.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for the embodiments or the prior art descriptions will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings without inventive labor.

Fig. 1 is a schematic structural diagram of an improved acoustic wave motor according to an embodiment of the present invention;

fig. 2 is a schematic structural diagram of an improved acoustic wave motor (without a housing) according to an embodiment of the present invention;

fig. 3 is a schematic view of an acoustic motor (without a casing) with an improved structure according to an embodiment of the present invention;

fig. 4 is a partially exploded view of a radial drive according to an embodiment of the present invention;

fig. 5 is a partially enlarged view taken along the line a in fig. 4.

Fig. 6 is a simple diagram illustrating a rotation driving principle of the radial driving device according to the embodiment of the present invention;

fig. 7 is an exploded schematic view of an axial driving device according to an embodiment of the present invention;

FIG. 8 is a simplified view of FIG. 7, labeled B, showing the driving principle of the axial driving device in a partially enlarged manner;

fig. 9 is a schematic view of another magnet structure arrangement provided in an embodiment of the present invention;

fig. 10 is a schematic structural diagram of an improved acoustic wave motor (without a plastic tailstock) according to an embodiment of the present invention;

wherein, in the figures, the respective reference numerals:

10-shell, 11-wear-resistant ring, 20-universal driving shaft, 21-reset spring, 30-radial driving device, 31-rotor component, 311-rotor iron core, 312-magnetic strip, 32-stator component, 321-stator iron core, 3211-separated stator, 3212-pole teeth, 322-coil, 40-axial driving device, 41-plastic tailstock, 42-telescopic shaft, 421-Z type elastic sheet, 43-magnetic strip and 44-electromagnet.

Detailed Description

Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below by referring to the drawings are exemplary and intended to explain the embodiments of the present invention and are not to be construed as limiting the present invention.

In the description of the embodiments of the present invention, it should be understood that the terms "length," "width," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like are used in the orientation or positional relationship indicated in the drawings, which is only for convenience in describing the embodiments of the present invention and simplifying the description, and do not indicate or imply that the device or element so indicated must have a particular orientation, be constructed and operated in a particular orientation, and therefore should not be construed as limiting the invention.

Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the embodiments of the present invention, "a plurality" means two or more unless specifically limited otherwise.

In the embodiments of the present invention, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "fixed" are to be construed broadly, e.g., as fixed or detachable connections or as an integral part; 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 embodiments of the present invention can be understood by those skilled in the art according to specific situations.

In one embodiment of the present invention, as shown in fig. 1-2, there is provided a structurally improved acoustic wave motor, which comprises a housing 10 with an opening at one end, a linkage shaft 20 passing through the other end of the housing and movably connected thereto, and a radial driving device 30 surrounding the linkage shaft. Specifically, the radial driving device 30 is installed in the inner cavity of the housing 10 and drives the linkage shaft 20 to rotate around the axis thereof.

In another embodiment of the present invention, as shown in fig. 3, the radial driving device 30 of the structurally improved acoustic wave motor includes a rotor assembly 31 with a magnetic material inside and a stator assembly 32 wrapping the rotor assembly. In this embodiment, the stator assembly 32 includes a stator core 321 wrapping the rotor assembly 31 and a coil 322 wound on the stator core. Specifically, when the coil 322 inputs a pulse-varying current, the magnetic field of the rotor assembly 31 is changed alternately, and the rotor assembly 31 is driven to rotate back and forth at a predetermined angle by the interaction between the magnetic change and the magnetic material of the rotor assembly 31.

In another embodiment of the present invention, as shown in fig. 4, the structure of the stator core 321 is formed by two sets of split stators 3211 which are symmetrically arranged, and the cross section of each split stator 3211 is an E-shaped structure and is arranged in a spaced manner corresponding to the magnetic stripe sets; the horizontal plane joints of the two sets of split stators 3211 are fixed by welding, so that the overall structure of the stator assembly 32 is more stable. The utility model discloses in, each disconnect-type stator 3211's cross-section is E type structure, makes stator module 32 is convenient for provide bigger installation space, and compact structure occupies that the size can be more miniaturized, plays and reduces wholly radial drive arrangement 30's volume further reduces this institutional advancement sound wave motor's volume for the volume of the personal care health care product as the power supply with this institutional advancement sound wave motor obtains further reducing. In addition, the coil 322 is fixed with the stator core 321 by gluing after the winding is completed, so that the cost is lower and the noise is lower.

Furthermore, the coils 322 are two groups, which are respectively wound on the pole teeth of the split stator 3211. In this embodiment, the coil 322 is wound around the pole teeth 3212 of the split stator 3211, the arc side length of the coil 322 exceeds the rotor core 311, and the coil 322 is not a conventional right-angle type, and two sides have large arc transitions, so that the power of the radial driving device 30 is stronger. In addition, the pole teeth 3212 of the split stator 3211 are located at the center line position of the magnetic stripe group at the corresponding position, so that the stability of the linkage shaft 20 in the rotation process is improved.

In another embodiment of the present invention, as shown in fig. 5 and 6, the rotor assembly 31 includes the linkage shaft 20, a rotor core 311 sleeved on the linkage shaft 20, and two sets of magnetic stripe groups symmetrically disposed on the arc surface of the rotor core, and each magnetic stripe group includes two magnetic stripes 312 with opposite magnetism. Specifically, a groove matched with the magnetic stripe 312 is dug on the arc surface of the rotor core 311. The working principle of the linkage shaft 20 realizing reciprocating rotation at a preset angle is as follows: when the coil 322 inputs a positive pulse current, the stator core 321 near one end of the magnetic stripe 312 is N-pole, and at this time, one of the magnetic stripe groups is N-pole and the magnetic stripe 312 is repelled with it, so that the linkage shaft 20 is driven to rotate, and at the same time, the other of the magnetic stripe groups is S-pole and the magnetic stripe 312 is attracted with it, so that the linkage shaft 20 can only rotate in the direction of S-pole and the magnetic stripe 312; when negative pulse current is input into the coil 322, the stator core 321 near one end of the magnetic strip group is in an S-pole state, at this time, one of the magnet groups is in an N-pole state, the magnetic strip 312 attracts the magnetic strip 312 to drive the linkage shaft 20 to rotate, and at the same time, the other of the magnet groups is in an S-pole state, the magnetic strip 312 repels the magnetic strip 312 to enable the linkage shaft 20 to only rotate in the direction of the N-pole magnetic strip 312, so that the single back-and-forth rotation of the linkage shaft 20 is completed, and when the pulse current input into the coil 322 changes, the reciprocating high-frequency rotating motion of the linkage shaft 20 according to the above actions can be realized.

In another embodiment of the present invention, as shown in fig. 7 and 8, an axial driving device 40 is disposed on the linkage shaft 20 at the opening side of the casing 10. In this embodiment, the axial driving device 40 includes a plastic tailstock 41 sleeved with the open end of the housing 10, a telescopic shaft 42 rotatably connected to the end of the linkage shaft 20, two magnets 43 perpendicular to the axial direction of the telescopic shaft and having opposite polarities, and an electromagnet 44 disposed on the plastic tailstock 41 and spaced from the two magnets by a certain distance. Specifically, the two groups of electromagnets 44 are respectively embedded in the plastic tailstock 41 and symmetrically arranged with respect to the two magnets 43, the electromagnets 44 are located at the center line position of the two magnets 43, and the electromagnets 44 and the magnets 43 generate different attraction or like repulsion through magnetic transformation to realize the telescopic motion of the linkage shaft 20 with respect to the housing 10. The specific motion principle is as follows: for example, the left magnet 43 is an upper N pole and a lower S pole, the right magnet 43 is an upper S pole and a lower N pole, when a positive pulse current is input to the two electromagnets 44, an S pole magnetic property is formed at one end of the electromagnet 44 above and close to the two magnets 43, and an S pole magnetic property is formed at one end of the electromagnet 44 below and close to the two magnets 43, so that the telescopic shaft 42 is driven to move relative to the electromagnet 44 along the axial direction thereof by the acting forces of like-polarity repulsion and opposite-polarity attraction, that is, the linkage shaft 20 is caused to perform a contraction motion relative to the housing 10; when the electromagnets 44 input negative pulse current, N-pole magnetism is formed above the two magnets 43 and at one end of the electromagnet 44 close to the magnets, S-pole magnetism is formed below the two magnets 43 and at one end of the electromagnet 44 close to the magnets, and the telescopic shaft 42 is driven to move along the axial direction of the telescopic shaft relative to the electromagnet 44 by the action force of like polarity repulsion and opposite polarity attraction, namely, the linkage shaft 20 is caused to extend relative to the housing 10; thereby completing the single telescopic motion of the linkage shaft 20, and when the pulse current input by the coil changes alternately, the reciprocating high-frequency telescopic motion of the linkage shaft 20 according to the motion can be realized. Of course, in order to enhance the power of the extension and contraction of the linkage shaft 20, the magnet 43 is preferably a strong magnet.

Furthermore, the end portions of the linkage shaft 20 and the telescopic shaft 42 close to the wear-resistant ring 11 are respectively sleeved with a return spring 21, the telescopic shaft 42 and the radial driving device 30 are arranged between the two return springs 21, and the structural design has the function of assisting the linkage shaft 20 to quickly return along the axial direction in the magnetic change process of the electromagnet 44. Of course, in order to improve the smoothness of the telescopic shaft 42 during the telescopic process, in this embodiment, a material guiding block is disposed at the end of the telescopic shaft 42, and the plastic tail seat 41 is provided with a material guiding hole matching with the material guiding block.

In another embodiment of the present invention, as shown in fig. 9, in this embodiment, the magnet 43 can be replaced by a middle magnetic material combined with two iron blocks at two sides, and the magnetic material in this way is distributed left and right, and gives two iron sheets magnetic conduction, so that the two iron sheets are unipolar magnetic, and the electromagnet 44 changes the magnetic regulation to realize the driving of the axial extension of the linkage shaft 20.

In another embodiment of the present invention, as shown in fig. 10, the end of the telescopic shaft 42 far away from the output end is provided with a Z-shaped elastic piece 421, which is fixedly connected to the plastic tailstock 41, and the structural design is used to assist the quick reset function of the linkage shaft 20 along the axial direction during the magnetic change of the electromagnet 44.

In another embodiment of the present invention, as shown in fig. 7, the shell 10 and the plastic tailstock 41 are respectively and fixedly provided with a wear-resistant ring 11 disposed coaxially, the linkage shaft 20 and one end of the telescopic shaft 42 respectively pass through the wear-resistant ring 11 disposed correspondingly, and the other ends of the linkage shaft 20 and the telescopic shaft 42 are connected by coaxial rotation, so that the linkage shaft 20 and the telescopic shaft 42 are both movably connected with the wear-resistant ring 11 disposed correspondingly. Because of the utility model discloses a universal driving shaft 20 can produce around radial high frequency back and forth rotation and around axial high frequency flexible, the event with universal driving shaft 20 reaches the wear resistance at the position of telescopic shaft 42 contact requires very high, through addding wear-resisting ring 11, and this wear-resisting ring adopts the material that wear resistance is high to make, can play and prevent to support universal driving shaft 20 shell 10 reaches plastic tailstock 41's wearing and tearing to improve product life.

The rest of each embodiment is the same as the first embodiment, and the features not explained in the embodiments are explained by the first embodiment, which is not described herein again.

The above description is only exemplary of the present invention and should not be taken as limiting the scope of the present invention, as any modifications, equivalents, improvements and the like made within the spirit and principles of the present invention are intended to be included within the scope of the present invention.

Claims

1. A structure improved sound wave motor comprises a shell with an opening at one end, a linkage shaft which penetrates through the other end of the shell and is movably connected with the shell, and a radial driving device which surrounds the linkage shaft, wherein the radial driving device is arranged in an inner cavity of the shell and drives the linkage shaft to rotate around the axis of the radial driving device; the method is characterized in that: lie in shell opening side be equipped with axial drive arrangement on the universal driving shaft, this axial drive arrangement include with the plastic tailstock that the shell open end cup jointed, locate universal driving shaft tip and rather than rotate the telescopic shaft of being connected, this telescopic shaft axis direction of perpendicular to and two magnets opposite in polarity and with this two magnet interval certain distance set up and locate electro-magnet on the plastic tailstock, the electro-magnet through the magnetic induction line that produces alternate transformation, with magnet produces the effect that opposite poles attract each other or like poles repel each other and realizes the telescopic shaft is for the plastic tailstock is concertina movement, drives the universal driving shaft for the shell is synchronous concertina movement.

2. The improved acoustic motor of claim 1, wherein: the shell reaches wear-resisting ring that the coaxial line set up has set firmly respectively on the plastic tailstock, the universal driving shaft reaches the one end of telescopic shaft passes respectively and corresponds the setting wear-resisting ring, and the rotation of these two other end coaxial lines is connected, makes the universal driving shaft reach the telescopic shaft all with correspond the setting wear-resisting ring swing joint.

3. The improved acoustic motor of claim 2, wherein: the end parts of the universal driving shaft and the telescopic shaft, which are close to the wear-resistant circular ring, are respectively sleeved with a return spring, and the telescopic shaft and the radial driving device are arranged between the two return springs.

4. The improved acoustic motor of claim 2, wherein: the end part of the telescopic shaft far away from the output end of the telescopic shaft is provided with a Z-shaped elastic sheet which is fixedly connected with the plastic tailstock.

5. The improved acoustic motor of claim 1, wherein: the magnet is a powerful magnet.

6. The improved acoustic motor of claim 1, wherein: the radial driving device comprises a rotor assembly internally provided with a magnetic material and a stator assembly wrapping the rotor assembly; the stator assembly comprises a stator core wrapping the rotor assembly and a coil wound on the stator core, and the stator assembly drives the rotor assembly to rotate in a reciprocating mode in a preset amplitude through interaction of magnetic transformation and magnetic materials of the rotor assembly.

7. The improved acoustic motor of claim 6, wherein: the rotor assembly comprises the universal driving shaft, a rotor core sleeved on the universal driving shaft, and two magnetic strip groups symmetrically arranged on the arc surface of the rotor core, wherein each magnetic strip group comprises two magnetic strips with opposite magnetism.

8. The improved acoustic motor of claim 7, wherein: the stator core is composed of two groups of separated stators which are symmetrically arranged, the section of each separated stator is of an E-shaped structure, and the separated stators and the magnetic strip groups are arranged at intervals in a corresponding mode.

9. The improved acoustic motor of claim 8, wherein: the coils are two groups and are respectively arranged on the pole teeth of the separated stator, and the pole teeth are positioned on the middle line position of the magnetic strip group at the corresponding position.

10. The improved acoustic motor of claim 8, wherein: and the horizontal plane joints of the two groups of separated stators are fixed by welding.