Non-contact transmission device based on near-field acoustic suspension and magnetic suspension coupling

Abstract

The invention belongs to the technical field of non-contact precise movement, and particularly relates to a non-contact transmission device based on near-field acoustic suspension and magnetic suspension coupling, which comprises a base, a suspended object is arranged in the base in a suspension manner, and the suspended object is in transmission connection with a plurality of magnetoacoustic suspension driving assemblies; the plurality of magnetoacoustic suspension driving assemblies are arranged at equal intervals in the length direction of a suspended object, and the magnetoacoustic suspension driving assemblies are mounted in the base; the magneto-acoustic levitation driving assembly comprises an electromagnet assembly and an acoustic levitation vibration unit, and a suspended object is arranged between the electromagnet assembly and the acoustic levitation vibration unit. The device is simple in structure, easy to process and low in cost, has the characteristics of high precision, less energy loss, extremely small friction, no abrasive particle pollution and the like, and can be widely applied to non-contact positioning and movement of magnetic conductors and other magnetic precision parts.

Description

Technical Field

[0001] The invention belongs to the technical field of non-contact precision movement, and in particular relates to a non-contact transmission device based on near-field acoustic suspension and magnetic suspension coupling. Background Art

[0002] Acoustic levitation technology is a suspension technology that uses the acoustic radiation pressure generated by high-frequency vibration to suspend objects. According to the propagation length of its sound waves, acoustic levitation can be divided into standing wave acoustic levitation and near-field acoustic levitation. Standing wave acoustic levitation is mainly used to suspend granular objects, and the levitation force is usually small. Near-field acoustic levitation is mainly used to suspend planar objects. Its advantage is that near-field acoustic levitation can not only provide vertical levitation force, but also provide horizontal thrust. However, the carrying capacity of near-field acoustic levitation is usually relatively low, so it is not suitable for occasions with large loads.

[0003] Electromagnetic levitation technology is a technology that uses electromagnetic force to make objects in a non-contact stable suspension state in space. It has many advantages, such as large load-bearing capacity, no need for lubrication, and no noise. However, its disadvantage is that electromagnetic levitation technology can only make objects levitate, but it is not easy to generate horizontal thrust to move the suspended object.

[0004] Therefore, a contactless transmission device based on near-field acoustic levitation and magnetic levitation coupling is proposed by utilizing their respective advantages to solve their respective disadvantages. Summary of the invention

[0005] The purpose of the present invention is to provide a non-contact transmission device based on near-field acoustic levitation and magnetic levitation coupling to solve the above problems.

[0006] To achieve the above object, the present invention provides the following solutions:

[0007] A non-contact transmission device based on near-field acoustic levitation and magnetic levitation coupling, comprising:

[0008] A base, wherein a suspended object is suspended in the base, wherein the suspended object is transmission-connected to a plurality of magnetic-acoustic suspension drive assemblies, wherein the plurality of magnetic-acoustic suspension drive assemblies are arranged at equal intervals along the length direction of the suspended object, and wherein the magnetic-acoustic suspension drive assemblies are installed in the base;

[0009] The magnetic acoustic suspension driving assembly includes an electromagnet assembly and an acoustic suspension vibration unit, and the suspended object is arranged between the electromagnet assembly and the acoustic suspension vibration unit.

[0010] Optionally, the acoustic suspension vibration unit includes:

[0011] A fixed bracket, the bottom end of which is fixedly connected to the inner bottom of the base;

[0012] A vibration module is mounted on the fixed bracket, and the vibration module is in transmission connection with the suspended object;

[0013] The transducer unit is transmission-connected to the vibration module.

[0014] Optionally, the vibration module includes:

[0015] A second horn is fixed to the fixed bracket, the bottom end of the second horn is transmission-connected to the transducer unit, the top end of the second horn is fixedly connected to a second excitation plate, and the second excitation plate is transmission-connected to the suspended object.

[0016] Optionally, the amplitude transformer 2 is fixedly connected to a lower cover plate 2, the lower cover plate 2 is fixedly connected to an upper cover plate 2, and the upper cover plate 2 is fixedly connected to the fixing bracket.

[0017] Optionally, the transducer unit comprises:

[0018] A second front metal cover plate, the top end of which is fixedly connected to the bottom end of the second horn;

[0019] The rear metal cover plate 2 is fixedly connected to the bottom end of the front metal cover plate 2 by fastening bolts 2;

[0020] A plurality of piezoelectric ceramic sheets 2 are coaxially sleeved on the outer side of the fastening bolt 2, and the piezoelectric ceramic sheets 2 are located between the front metal cover plate 2 and the rear metal cover plate 2;

[0021] The second ultrasonic generator is electrically connected to the second piezoelectric ceramic sheet.

[0022] Optionally, the electromagnet assembly comprises:

[0023] Base 1, fixedly connected to the inner top of the base;

[0024] The electromagnetic part is fixedly connected to the bottom of the base 1, the suspended object is located between the electromagnetic part and the excitation plate 2, and the suspended object is magnetically connected to the electromagnetic part;

[0025] The first ultrasonic signal generator is electrically connected to the electromagnetic part.

[0026] Optionally, the electromagnetic part includes:

[0027] An iron core 1, fixedly connected to the base 1;

[0028] A plurality of excitation coils 1 are embedded in the iron core 1, and the plurality of excitation coils 1 are electrically connected to the ultrasonic signal generator 1.

[0029] Optionally, the second front metal cover plate is made of aluminum, and the second rear metal cover plate is made of steel.

[0030] Optionally, the second front metal cover plate, the second piezoelectric ceramic sheet, the second rear metal cover plate, the second fastening bolt, the second amplitude transformer and the second excitation plate are coaxially arranged.

[0031] Optionally, the second front metal cover plate, the second piezoelectric ceramic plate, the second rear metal cover plate and the second amplitude transformer are all cylindrical, and the second excitation plate is a square flat plate.

[0032] Compared with the prior art, the present invention has the following advantages and technical effects:

[0033] When in use, the present invention provides a vertical suspension force for the suspended object through the electromagnet assembly, and provides a horizontal thrust for the suspended object through the acoustic suspension vibration unit, combining the advantages of the high bearing capacity of the electromagnet assembly and the advantages of the horizontal force of the acoustic suspension vibration unit to achieve non-contact positioning and movement control of magnetic precision components. The device has a simple structure, is easy to process, and has low cost. It has the characteristics of high precision, low energy loss, extremely low friction, and no abrasive pollution. It can be widely used in the non-contact positioning and movement of magnetic conductors and other magnetic precision components. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments are briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative labor:

[0035] Figure 1 It is a schematic diagram of the structure of the present invention;

[0036] Figure 2 It is a schematic diagram of the structure and installation of the acoustic suspension vibration unit in the present invention;

[0037] Figure 3 It is a schematic diagram of the structure and installation of the electromagnet assembly in the present invention;

[0038] Figure 4 It is a structural schematic diagram and a force analysis diagram of the suspended object of the present invention;

[0039] Figure 5 It is a partial schematic diagram of the acoustic suspension vibration unit, the suspension plate and the electromagnet assembly in the present invention;

[0040] Among them, 1. base; 2. first electromagnet assembly; 3. second electromagnet assembly; 4. third electromagnet assembly; 5. suspended object; 6. first acoustic suspension vibration unit; 7. second acoustic suspension vibration unit; 8. third acoustic suspension vibration unit; 301. base one; 302. iron core one; 303. excitation coil one; 304. coil cover one; 305. wire one; 306. ultrasonic signal generator one; 701. excitation plate two; 702. amplitude transformer two; 703. upper cover two; 704. lower cover two; 705. front metal cover two; 706. fastening bolt two; 707. copper electrode sheet two; 708. piezoelectric ceramic sheet two; 709. rear metal cover two; 710. wire two; 711. ultrasonic generator two; 712. fixing bracket; 702-1. flange structure two. DETAILED DESCRIPTION

[0041] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0042] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the present invention is further described in detail below with reference to the accompanying drawings and specific embodiments.

[0043] Reference Figures 1 to 5 The present invention discloses a non-contact transmission device based on near-field acoustic suspension and magnetic suspension coupling, comprising:

[0044] A base 1, in which a suspended object 5 is suspended, the suspended object 5 is connected to a plurality of magnetic acoustic suspension drive components, the plurality of magnetic acoustic suspension drive components are arranged at equal intervals along the length direction of the suspended object 5, and the magnetic acoustic suspension drive components are installed in the base 1;

[0045] The magnetic acoustic levitation driving assembly includes an electromagnet assembly and an acoustic levitation vibration unit, and the suspended object 5 is arranged between the electromagnet assembly and the acoustic levitation vibration unit.

[0046] When in use, the present invention provides a vertical suspension force for the suspended object 5 through the electromagnet assembly, and provides a horizontal thrust for the suspended object 5 through the acoustic suspension vibration unit, combining the advantages of the high bearing capacity of the electromagnet assembly and the advantages of the horizontal force of the acoustic suspension vibration unit to achieve non-contact positioning and movement control of magnetic precision components. The device has a simple structure, is easy to process, and has low cost. It has the characteristics of high precision, low energy loss, extremely low friction, and no abrasive pollution. It can be widely used in non-contact positioning and movement of magnetic conductors and other magnetic precision components.

[0047] The present invention provides a contactless transmission device based on near-field acoustic levitation and magnetic levitation coupling, comprising: a base 1 and a plurality of magnetic acoustic levitation drive components, the magnetic acoustic levitation drive components are composed of an acoustic levitation vibration unit group and an electromagnet component, the acoustic levitation vibration unit group and the electromagnet component are respectively fixedly supported on the top and bottom of the base 1, and the suspended object 5 is suspended above the acoustic levitation vibration unit group and below the electromagnet component.

[0048] The number of acoustic levitation vibration units and electromagnet assemblies increases or decreases according to the length of the suspended object 5 .

[0049] In this embodiment, three acoustic levitation vibration units are provided, namely a first acoustic levitation vibration unit 6, a second acoustic levitation vibration unit 7, and a third acoustic levitation vibration unit 8. The three acoustic levitation vibration units have the same structure, installation method and direction, and together constitute an acoustic levitation vibration unit group.

[0050] The installation positions of the three acoustic suspension vibration units are guaranteed by the base 1, which requires that the three units are linearly and evenly distributed on the same horizontal plane, which can not only increase the carrying capacity of the near-field acoustic suspension, but also control the inclination of the transmitted object, thereby achieving high precision and safety of this mobile platform.

[0051] There are three electromagnet assemblies, namely the first electromagnet assembly 2, the second electromagnet assembly 3, and the third electromagnet assembly 4. The three electromagnet assemblies have the same structure, installation method and direction, and together constitute an electromagnet group. The installation positions of the three electromagnet assemblies are guaranteed by the base 1, and the three are required to be linearly and evenly distributed on the same horizontal plane.

[0052] In the prior art, the method of breaking the symmetrical sound field, such as uneven amplitude distribution and grooves, is generally used to generate thrust to achieve horizontal transportation. This method can achieve long-distance transmission of suspended objects, but the carrying capacity of near-field acoustic levitation is not large enough and cannot be used in occasions with large loads. Another method is to groove the suspension plate, but the grooves will weaken the carrying capacity of the transmission device.

[0053] Based on the above problems, we use the acoustic suspension vibration unit group to provide horizontal thrust and a smaller suspension force and the electromagnet assembly to provide a larger electromagnetic attraction to jointly ensure the horizontal ultra-precise positioning and movement of the suspended object 5.

[0054] Specifically, in the above embodiment, the base 1, the acoustic suspension vibration unit group, the electromagnet group and the suspended object 5 together constitute a non-contact transmission platform for coupling basic wave type near-field acoustic suspension and magnetic suspension.

[0055] As an optional implementation, the acoustic suspension vibration unit includes:

[0056] A fixed bracket 712, the bottom end of which is fixedly connected to the inner bottom of the base 1;

[0057] A vibration module is mounted on the fixed bracket 712, and the vibration module is in transmission connection with the suspended object 5;

[0058] The transducer unit is transmission-connected to the vibration module.

[0059] As an optional implementation, the vibration module includes:

[0060] The second horn 702 is fixed to the fixed bracket 712 , the bottom end of the second horn 702 is transmission connected to the transducer unit, the top end of the second horn 702 is fixedly connected to the second excitation plate 701 , and the second excitation plate 701 is transmission connected to the suspended object 5 .

[0061] As an optional implementation, the second amplitude transformer 702 is fixedly connected to the second lower cover plate 704 , the second lower cover plate 704 is fixedly connected to the second upper cover plate 703 , and the second upper cover plate 703 is fixedly connected to the fixing bracket 712 .

[0062] As an optional implementation, the transducer unit includes:

[0063] The top end of the second front metal cover plate 705 is fixedly connected to the bottom end of the second amplitude transformer 702;

[0064] The second rear metal cover plate 709 is fixedly connected to the bottom end of the second front metal cover plate 705 by fastening bolts 706;

[0065] A plurality of second piezoelectric ceramic sheets 708 are coaxially sleeved on the outer side of the second fastening bolt 706, and the second piezoelectric ceramic sheets 708 are located between the second front metal cover plate 705 and the second rear metal cover plate 709;

[0066] The second ultrasonic generator 711 is electrically connected to the second piezoelectric ceramic piece 708 .

[0067] As an optional implementation, the second front metal cover plate 705 is made of aluminum, and the second rear metal cover plate 709 is made of steel.

[0068] As an optional implementation, the second front metal cover plate 705, the second piezoelectric ceramic plate 708, the second rear metal cover plate 709, the second fastening bolt 706, the second amplitude rod 702 and the second excitation plate 701 are coaxially arranged.

[0069] As an optional implementation, the second front metal cover plate 705, the second piezoelectric ceramic plate 708, the second rear metal cover plate 709 and the second amplitude transformer 702 are all cylindrical, and the second excitation plate 701 is a square flat plate.

[0070] The acoustic levitation vibration unit (the first acoustic levitation vibration unit 6, the second acoustic levitation vibration unit 7, the third acoustic levitation vibration unit 8, the structure of the second acoustic levitation vibration unit 7 is specifically described below) includes a transducer unit, a second amplitude rod 702 and a second excitation plate 701, a second upper cover plate 703, a second lower cover plate 704, and a fixed bracket 712.

[0071] The transducer unit mainly includes four annular piezoelectric ceramic sheets 708, a front metal cover plate 705, a rear metal cover plate 709 and a fastening bolt 706. The piezoelectric ceramic sheet 708 is located between the front metal cover plate 705 and the rear metal cover plate 709, and is clamped by the fastening bolt 706 with a pre-tightening force.

[0072] The horn 702 can be connected to the transducer unit by studs. The horn 702 is stepped and has a flange structure 702-1 at the transition section. The horn 702 and the excitation plate 701 can be integrated or connected by bolts.

[0073] By using the inverse piezoelectric effect, the transducer unit converts high-frequency alternating current into vibration of the excitation plate to squeeze the air between the second excitation plate 701 and the lower surface of the suspended object 5, so that the suspended object obtains a vertical upward suspension force and a horizontal thrust.

[0074] As an optional implementation, in order to improve the energy utilization rate of the transducer unit, the materials of the second front metal cover plate 705 and the second rear metal cover plate 709 are usually different. The second front metal cover plate 705 is made of aluminum, and the second rear metal cover plate 709 is made of steel.

[0075] As an optional implementation, the second front metal cover plate 705, the second piezoelectric ceramic plate 708, the second rear metal cover plate 709 and the second amplitude transformer 702 are all cylindrical, and the second excitation plate 701 is a square flat plate.

[0076] As an optional implementation, the second front metal cover plate 705, the second piezoelectric ceramic plate 708, the second rear metal cover plate 709, the second fastening bolt 706 and the second amplitude transformer 702 are installed coaxially, and the center of the second excitation plate 701 is on the same straight line as the axis.

[0077] As an optional embodiment, four piezoelectric ceramic sheets 2 708 are connected in series mechanically and in parallel electrical terminals. Both end surfaces of the piezoelectric ceramic sheet 2 708 are bonded to adjacent components by using epoxy resin as an adhesive, and then fixed and tightened with fastening bolts 2 706. Since the polarization directions of two adjacent piezoelectric ceramic sheets 2 708 are opposite, copper electrodes 2 are used to connect the same polarization directions of two separated piezoelectric ceramic sheets 2 708.

[0078] Furthermore, the two second piezoelectric ceramic sheets 708 at the top are electrically connected to the second copper electrode sheet 707, and the two second piezoelectric ceramic sheets 708 at the bottom are electrically connected to another second copper electrode sheet 707.

[0079] The positive and negative electrodes of the second ultrasonic generator 711 are electrically connected to the corresponding second piezoelectric ceramic sheet 708 through the second wire 710 and the second copper electrode sheet 707, respectively. The second ultrasonic generator 711 generates a sinusoidal alternating current with a frequency of f7 and applies it to the two second copper electrode sheets 707, and then to the second piezoelectric ceramic sheet 708. Based on the inverse piezoelectric effect, the second piezoelectric ceramic sheet 708 will generate vibrations of the same frequency in its longitudinal direction.

[0080] The other end of the second horn 702 is connected to the second excitation plate 701 and transmits the vibration to the second excitation plate 701, so that the second excitation plate 701 generates vibrations of the same frequency. The upper surface of the second excitation plate 701 is the working surface, and the second horn 702 and the second excitation plate 701 can be processed into an integrated body or connected by bolts.

[0081] The upper surface of the second flange structure 702-1 on the second horn 702 contacts the second upper cover plate 703, and the lower surface of the second flange structure 702-1 contacts the second lower cover plate 704. The second upper cover plate 703 and the second lower cover plate 704 are connected by bolts, so as to realize the installation and positioning of the second horn 702.

[0082] As an optional embodiment, the electromagnet assembly includes:

[0083] Base 1 301, fixedly connected to the inner top of base 1;

[0084] The electromagnetic part is fixedly connected to the bottom of the first base 301, and the suspended object 5 is located between the electromagnetic part and the second excitation plate 701, and the suspended object 5 is magnetically connected to the electromagnetic part;

[0085] The ultrasonic signal generator 306 is electrically connected to the electromagnetic part.

[0086] As an optional implementation, the electromagnetic part includes:

[0087] The iron core 302 is fixedly connected to the base 301;

[0088] A plurality of excitation coils 303 are embedded in the iron core 302 , and the plurality of excitation coils 303 are electrically connected to an ultrasonic signal generator 306 .

[0089] The ultrasonic signal generator 306 is electrically connected to the plurality of excitation coils 303 via a wire 305 .

[0090] The first electromagnet assembly 2, the second electromagnet assembly 3 and the third electromagnet assembly 4 have the same structure, and all include a base 301, an iron core 302 and an excitation coil 303. The excitation coil 303 is arranged in the iron core 302, and a coil cover 304 is fixed to the bottom of the excitation coil 303. The coil cover 304 is glued to the iron core 302 by epoxy resin, and the excitation coil 303 is wound in the middle of the iron core 302 and fixed on the base 301 through the base.

[0091] Furthermore, the high-frequency alternating current generated by the ultrasonic signal generator 306 is applied to the excitation coil 303 through the wire 305, and a magnetic field is generated around the excitation coil 303 according to the magnetic effect of the current, so that the suspended object is subjected to an electromagnetic force in the opposite direction of its own gravity.

[0092] Furthermore, the first electromagnet assembly 2, the second electromagnet assembly 3 and the third electromagnet assembly 4 have the same structure and installation method, and together constitute an electromagnet group. The installation positions of the first electromagnet assembly 2, the second electromagnet assembly 3 and the third electromagnet assembly 4 are ensured by the base 1, and the center lines of each of the electromagnet assemblies are located on the same plane. And the center lines of the three electromagnet assemblies are respectively located on the same straight line as the center lines of the three acoustic suspension vibration units.

[0093] It should be understood that the suspended object 5 is in the shape of a flat plate, and its width should be smaller than the width of the base 1. The width edge and length edge of the excitation plate in each acoustic suspension vibration unit are flush, and the length of the suspension plate should be greater than or equal to the sum of the lengths of the excitation plates in each acoustic suspension vibration unit.

[0094] The working principle of the non-contact transmission device of the present invention is as follows:

[0095] A rectangular coordinate system is established on the upper surface of the second excitation plate 701 in the vertical vibration unit. The origin of the coordinate system is located at the center point of the upper surface of the second excitation plate 701, the horizontal direction is the x-axis, the vertical direction is the z-axis, and the y-axis is perpendicular to the plane formed by the x-axis and the z-axis. Therefore, the vibration amplitude distribution expression of the second excitation plate 701 is:

[0096] Formula 1:

[0097] v7(x,y,t)=ξ7·V7(x,y)·sin(2πf7t)

[0098] Wherein, ξ7 is the maximum amplitude of the vibration of the second excitation plate 701, and V7(x, y) is the normalized amplitude distribution of the second excitation plate 701. Accordingly, when the center of the suspended object 5 is also located on the z-axis, its vibration amplitude distribution expression is Formula 2:

[0099] v5(x,y,t)=ξ5·V5(x,y)·sin(2πf5t)

[0100] Among them, ξ2 is the maximum amplitude of vibration of the suspended object 5, and V5(x, y) is the normalized amplitude distribution of the suspended object 5.

[0101] When the suspended object 5 moves horizontally, its displacement relative to the initial position is d, and its vibration amplitude distribution expression is formula 3:

[0102] v5(x,y,t)=ξ5·V5(xd,y)·sin(2πf5t)

[0103] Since the present invention designs a vertical vibration unit group, it can ensure that the suspended object 5 always remains horizontal, so the squeeze film expression between the second excitation plate 701 and the suspended object 5 is formula 4:

[0104] h7(x,y,t)=h a7 +v5(x,y,t)+v7(x,y,t)

[0105] where h a7 is the average film thickness of the extruded film. In addition, the boundary condition of this extruded film is that the air pressure p is all around. a Therefore, the control equation of the squeeze film pressure distribution p7 (x, y, t) is Formula 5:

[0106]

[0107] Where σ is the extrusion number; T is the dimensionless time, and is the speed and acceleration of the suspended object 5 moving horizontally; Λ v and Λ a All are coefficients.

[0108] Through the corresponding numerical solution method, by jointly solving Formula 1, Formula 3, Formula 4 and Formula 5, the squeeze film pressure distribution p7 (x, y, t) can be obtained, and the suspension force Formula 6:

[0109]

[0110] It is derived based on the relevant theories of Newtonian fluid in cylindrical coordinate system. Starting from the Reynolds equation of air film pressure, combined with the reflector motion equation, boundary conditions, etc., the horizontal thrust Ft7 is obtained through integration and coordinate transformation as Formula 7:

[0111]

[0112] Among them, τ zr is the shear stress between the z direction and the r direction, which mainly depends on the pressure gradient and the relative motion of the reflector. The shear stress τzr Formula 8:

[0113]

[0114] Taking the second electromagnet assembly 3 as an example, the expression of the suspension force F3 generated by the electromagnet is formula 6:

[0115]

[0116] Where μ0 is the magnetic permeability of air, N is the number of turns of the electromagnet winding, and A is the area of ​​the electromagnet pole.

[0117] Similarly, we can solve F2, F4, and Therefore, F2, F3, F4 and They are used together to support the suspension of the suspended object 5, and can be adjusted to keep the suspended object 5 always horizontal. Ft6, Ft7, and Ft8 are used to achieve horizontal movement of the suspended object 5.

[0118] It should be understood that the center of the suspended object 5 is located on the z-axis. The sum of the magnitudes is equal to the gravity of the object being transported.

[0119] In the description of the present invention, it should be understood that the terms "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside" and "outside" etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0120] The embodiments described above are only descriptions of the preferred modes of the present invention, and are not intended to limit the scope of the present invention. Without departing from the design spirit of the present invention, various modifications and improvements made to the technical solutions of the present invention by ordinary technicians in this field should all fall within the protection scope determined by the claims of the present invention.

Claims

1. A non-contact transmission device based on near-field acoustic levitation and magnetic levitation coupling, characterized in that: include: A base (1), wherein a suspended object (5) is suspended in the base (1), the suspended object (5) is transmission-connected to a plurality of magnetic-acoustic suspension drive assemblies, the plurality of magnetic-acoustic suspension drive assemblies are arranged at equal intervals along the length direction of the suspended object (5), and the magnetic-acoustic suspension drive assemblies are installed in the base (1); The magnetic acoustic suspension driving component comprises an electromagnet component and an acoustic suspension vibration unit, and the suspended object (5) is arranged between the electromagnet component and the acoustic suspension vibration unit.

2. The non-contact transmission device based on near-field acoustic levitation and magnetic levitation coupling according to claim 1 is characterized in that: The acoustic suspension vibration unit comprises: A fixed bracket (712), the bottom end of which is fixedly connected to the inner bottom of the base (1); a vibration module, mounted on the fixed support (712), the vibration module being in transmission connection with the suspended object (5); The transducer unit is transmission-connected to the vibration module.

3. The non-contact transmission device based on near-field acoustic levitation and magnetic levitation coupling according to claim 2 is characterized in that: The vibration module comprises: A second amplitude changing rod (702) is fixed to the fixed bracket (712), the bottom end of the second amplitude changing rod (702) is transmission connected to the transducer unit, the top end of the second amplitude changing rod (702) is fixedly connected to a second excitation plate (701), and the second excitation plate (701) is transmission connected to the suspended object (5).

4. The non-contact transmission device based on near-field acoustic levitation and magnetic levitation coupling according to claim 3 is characterized in that: The second amplitude changing rod (702) is fixedly connected to the second lower cover plate (704), the second lower cover plate (704) is fixedly connected to the second upper cover plate (703), and the second upper cover plate (703) is fixedly connected to the fixed bracket (712).

5. The non-contact transmission device based on near-field acoustic levitation and magnetic levitation coupling according to claim 4 is characterized in that: The transducer unit comprises: A second front metal cover plate (705), the top end of which is fixedly connected to the bottom end of the second amplitude transformer (702); The second rear metal cover plate (709) is fixedly connected to the bottom end of the second front metal cover plate (705) by means of a second fastening bolt (706); A plurality of piezoelectric ceramic sheets (708) are coaxially sleeved on the outer side of the second fastening bolt (706), and the second piezoelectric ceramic sheets (708) are located between the second front metal cover plate (705) and the second rear metal cover plate (709); Ultrasonic generator 2 (711) is electrically connected to piezoelectric ceramic sheet 2 (708).

6. The non-contact transmission device based on near-field acoustic levitation and magnetic levitation coupling according to claim 3 is characterized in that: The electromagnet assembly comprises: Base 1 (301), fixedly connected to the inner top of the base (1); The electromagnetic part is fixedly connected to the bottom of the first base (301), the suspended object (5) is located between the electromagnetic part and the second excitation plate (701), and the suspended object (5) is magnetically connected to the electromagnetic part; An ultrasonic signal generator (306) is electrically connected to the electromagnetic part.

7. The non-contact transmission device based on near-field acoustic levitation and magnetic levitation coupling according to claim 6 is characterized in that: The electromagnetic part comprises: Iron core 1 (302), fixedly connected to base 1 (301); A plurality of excitation coils (303) are embedded in the iron core (302), and the plurality of excitation coils (303) are electrically connected to the ultrasonic signal generator (306).

8. The non-contact transmission device based on near-field acoustic levitation and magnetic levitation coupling according to claim 5 is characterized in that: The front metal cover plate 2 (705) is made of aluminum, and the rear metal cover plate 2 (709) is made of steel.

9. The non-contact transmission device based on near-field acoustic levitation and magnetic levitation coupling according to claim 5 is characterized in that: The second front metal cover plate (705), the second piezoelectric ceramic plate (708), the second rear metal cover plate (709), the second fastening bolt (706), the second amplitude change rod (702) and the second excitation plate (701) are coaxially arranged.

10. The non-contact transmission device based on near-field acoustic levitation and magnetic levitation coupling according to claim 5, characterized in that: The second front metal cover plate (705), the second piezoelectric ceramic plate (708), the second rear metal cover plate (709) and the second amplitude transformer (702) are all cylindrical, and the second excitation plate (701) is a square flat plate.

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