Piezoelectric vibration table

Abstract

The utility model provides a piezoelectric type vibration table, piezoelectric type vibration table includes: the table body, the table body includes the top cap and base, the top cap and base are connected along the axial direction, the table body is hollowly arranged to form the accommodation portion, the top cap is equipped with a plurality of transmission holes along the axial direction, pre -tensioning elastomer, pre -tensioning elastomer sets up in the accommodation portion, and with the base bottom is opposite and holds, excitation output shaft, the lower end of excitation output shaft with pre -tensioning elastomer is opposite and holds along the axial direction, piezoelectric ceramic, piezoelectric ceramic is opposite and holds between excitation output shaft with top cap along the axial direction, transmission shaft, the number of transmission shaft is a plurality, a plurality of transmission shaft surrounds piezoelectric ceramic and sets up, transmission shaft is opposite and holds along the axial direction with excitation output shaft, and along the axial direction passes transmission hole, the piezoelectric type vibration table of the utility model, the shape, size of piezoelectric ceramic sheet are not restricted, and the upper limit excitation force of piezoelectric type vibration table is promoted.

Description

Technical Field

[0001] This utility model relates to a piezoelectric vibration table. Background Technology

[0002] Traditional piezoelectric vibration tables employ a bottom-up, vertically stacked structure, with the core components consisting of a piezoelectric ceramic plate, a preload spring, and an excitation output shaft arranged axially. This design necessitates the indirect transmission of vibration energy from the piezoelectric ceramic plate through multiple layers of mechanical structure: first, the high-frequency electrical signal is converted into mechanical vibration by the piezoelectric ceramic plate; then, the vibration is transmitted to the shaft via the axial compression deformation of the preload spring; and finally, the vibration is transmitted to the external load via the shaft. However, this structure introduces distortion due to redundant energy transmission paths. The piezoelectric ceramic plate, acting as the vibration source, is located at the bottom of the system, and its axial vibration must be attenuated and adjusted by the preload spring before being transmitted to the shaft. Because the spring element exhibits nonlinear elastic deformation, especially at high-frequency excitation (>1kHz), phase lag and amplitude attenuation occur, leading to waveform distortion.

[0003] Existing vibration tables with preloaded springs require independent design of the shape and size of the piezoelectric ceramics, which may limit the excitation force of the piezoelectric ceramics to meet the requirements.

[0004] In view of this, it is necessary to improve the existing piezoelectric vibration table to solve the above problems. Utility Model Content

[0005] The purpose of this invention is to provide a piezoelectric vibration table to solve the problem of limited size and shape of the warning spring in existing vibration tables.

[0006] To achieve the above objectives, this utility model provides a piezoelectric vibration table, which includes:

[0007] The platform includes a top cover and a base, which are connected axially. The platform is hollow to form a receiving part, and the top cover has multiple transmission holes extending through it axially.

[0008] A pre-tightening elastomer is disposed within the receiving portion and abuts against the bottom of the base;

[0009] An excitation output shaft, the lower end of which abuts against the preloaded elastic body axially;

[0010] A piezoelectric ceramic, which is axially held between the excitation output shaft and the top cover;

[0011] A drive shaft, wherein there are multiple drive shafts arranged around the piezoelectric ceramic, the drive shafts abutting against the excitation output shaft in the axial direction and passing through the drive hole in the axial direction;

[0012] A transmission platform is disposed above the top cover and is axially abutting against the transmission shaft.

[0013] As a further improvement of this utility model, the piezoelectric ceramic is disposed in the middle of the excitation output shaft and is coaxially disposed with the excitation output shaft.

[0014] As a further improvement of this utility model, the plurality of the transmission shafts are arranged in a circular array around the axis of the excitation output shaft.

[0015] As a further improvement of this utility model, the number of drive shafts is four.

[0016] As a further improvement of this utility model, the upper surface of the excitation output shaft is recessed to form a limiting hole, the transmission shaft includes a columnar limiting part and a transmission part, the diameter of the transmission part is larger than the diameter of the limiting part, the limiting part is inserted into the limiting hole, the lower end of the transmission part abuts against the excitation output shaft and passes through the transmission hole axially.

[0017] As a further improvement of this utility model, the transmission part is fixedly connected to the transmission table by screws.

[0018] As a further improvement of this utility model, the pre-tightening elastic body includes an elastic body, an upper shaft disposed above the elastic body, and a lower shaft disposed below the elastic body. The excitation output shaft is recessed in the lower direction to form a first insertion hole, and the bottom of the base is recessed in the lower direction to form a second insertion hole. The upper shaft is inserted into the first insertion hole, and the lower shaft is inserted into the second insertion hole.

[0019] As a further improvement of this utility model, the pre-tightening elastomer and the base are arranged radially at intervals to form a heat dissipation cavity.

[0020] As a further improvement of this utility model, the base is provided with a heat dissipation channel that communicates with the heat dissipation cavity.

[0021] As a further improvement of this utility model, the piezoelectric vibration table also includes a cooling fan, which is arranged adjacent to the heat dissipation channel.

[0022] The beneficial effects of this utility model are: the piezoelectric vibration table of this utility model, by setting multiple transmission shafts around the excitation output shaft, makes room for the piezoelectric ceramic in the middle, so that the shape and size of the piezoelectric ceramic sheet are not limited, thereby increasing the upper limit excitation force of the piezoelectric vibration table. Attached Figure Description

[0023] The accompanying drawings, which are included to provide a further understanding of this application and form part of this application, illustrate exemplary embodiments and are used to explain this application, but do not constitute an undue limitation of this application. In the drawings:

[0024] Figure 1 This is a three-dimensional structural diagram of the piezoelectric vibration table of this utility model;

[0025] Figure 2 This is an exploded structural diagram of the piezoelectric vibration table of this utility model;

[0026] Figure 3 This is a side view of the piezoelectric vibration table of this utility model.

[0027] Figure 4 yes Figure 3 A schematic diagram of the cross-sectional structure of AA. Detailed Implementation

[0028] The technical solution of this utility model will now be clearly and completely described with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this utility model. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.

[0029] In the description of this utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings and are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0030] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances. Furthermore, the technical features involved in the different embodiments of this utility model described below can be combined with each other as long as they do not conflict with each other.

[0031] like Figures 1 to 4 As shown, the piezoelectric vibration table 100 of this utility model includes a table body 1, a pre-tightened elastic body 2, an excitation output shaft 3, a piezoelectric ceramic 4, a transmission shaft 5, a transmission table surface 6, a cooling fan 7, and a guide bushing 8.

[0032] The platform 1 includes a top cover 11 and a base 12. The base 12 includes a cylinder bottom 122 disposed below and a cylinder body 121 disposed above. The cylinder body 121 and the cylinder bottom 122 are fixedly connected by screws.

[0033] The top cover 11 and the base 12 are connected axially. In this embodiment, the top cover 11 and the cylinder 121 are fixedly connected by screws.

[0034] The platform 1 is hollow to form a receiving part 13, and the top cover 11 is provided with a plurality of transmission holes 111 through it along the axial direction.

[0035] The pre-tightening elastomer 2 is disposed within the receiving portion 13 and abuts against the bottom of the base 12.

[0036] The pre-tightening elastic body 2 includes an elastic body 21, an upper shaft 22 disposed above the elastic body 21, and a lower shaft 23 disposed below the elastic body 21. The excitation output shaft 3 is recessed in the lower direction to form a first insertion hole 31, and the bottom of the base 12 is recessed in the lower direction to form a second insertion hole 123. The upper shaft 22 is inserted into the first insertion hole 31, and the lower shaft 23 is inserted into the second insertion hole 123.

[0037] In this embodiment, the preload elastic body 2 is a rubber spring. Rubber springs have low stiffness, high accuracy in preload control, and are single-piece designs, offering good stability without affecting waveform output distortion. Using a rubber spring ensures both stable preload and good damping characteristics, resulting in high linearity between compression and preload, and high accuracy in preload magnitude.

[0038] In this embodiment, the pre-tightened elastic body 2 is connected and limited to the excitation output shaft 3 and the base 12 respectively through the upper shaft 22 and the lower shaft 23. The lower shaft 23 can pass through the base 12 and be fixed by threaded connection with the nut.

[0039] The pre-tightening elastic body 2 and the base 12 are radially spaced to form a heat dissipation cavity 14. More specifically, the heat dissipation cavity 14 is formed between the pre-tightening elastic body 2 and the cylinder bottom 122, and a heat dissipation channel 15 communicating with the heat dissipation cavity 14 is formed on the cylinder bottom 122. The cooling fan 7 is disposed adjacent to the heat dissipation channel 15. In this embodiment, the cooling fan 7 is disposed on one side of the base 12, and can be bonded, screwed, or snapped to the base 12, and is located outside the receiving portion 13. The cooling fan 7 draws air outward from the heat dissipation cavity 14.

[0040] The number of heat dissipation channels 15 is two. In some embodiments, the base 12 may also have a return air channel communicating with the heat dissipation cavity 14 to improve the heat dissipation effect.

[0041] The lower end of the excitation output shaft 3 abuts against the pre-tightened elastic body 2 along the axial direction. The structure of the excitation output shaft 3 in this embodiment is different from that of the traditional output shaft, which can directly transmit vibration to the platform 1. In this embodiment, the excitation output shaft 3 indirectly outputs vibration through the transmission shaft 5.

[0042] The guide sleeve 8 is located radially between the excitation output shaft 3 and the cylinder 121. The guide sleeve 8 is used to achieve radial positioning and at the same time makes the movement of the excitation output shaft 3 smoother.

[0043] The piezoelectric ceramic 4 is an energy conversion module that converts electrical energy into mechanical energy. In this embodiment, the piezoelectric ceramic 4 is axially supported between the excitation output shaft 3 and the top cover 11. Furthermore, the piezoelectric ceramic 4 is disposed in the middle of the excitation output shaft 3 and is coaxially arranged with the excitation output shaft 3. Therefore, the shape and size of the piezoelectric ceramic 4 are not limited, increasing the upper limit of the excitation force of the piezoelectric vibration table 100, while also reducing cost.

[0044] There are multiple drive shafts 5, which are arranged around the piezoelectric ceramic 4. Each drive shaft 5 abuts against the excitation output shaft 3 axially and passes through the drive hole 111 axially. In this embodiment, the drive shafts 5 transmit the vibration of the excitation output shaft 3. The drive shafts 5 surround the piezoelectric ceramic 4, thereby giving way to the piezoelectric ceramic 4 and providing it with a complete central space.

[0045] The transmission platform 6 is positioned above the top cover 11 and is axially abutting against the transmission shaft 5. The transmission part 52 is fixedly connected to the transmission platform 6 by screws.

[0046] The plurality of drive shafts 5 are arranged in a circular array around the axis of the excitation output shaft 3. More specifically, the number of drive shafts 5 is four.

[0047] The upper surface of the excitation output shaft 3 is recessed to form a plurality of limiting holes 32. The transmission shaft 5 includes a columnar limiting part 51 and a transmission part 52. The diameter of the transmission part 52 is larger than the diameter of the limiting part 51. The limiting part 51 is inserted into the limiting hole 32. The lower end of the transmission part 52 abuts against the excitation output shaft 3 and passes through the transmission hole 111 axially.

[0048] The piezoelectric vibration table 100 of this invention, by setting multiple transmission shafts 5 surrounding the excitation output shaft 3, makes room for the piezoelectric ceramic 4 in the middle, so that the shape and size of the piezoelectric ceramic 4 are not limited, thereby increasing the upper limit excitation force of the piezoelectric vibration table 100.

[0049] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0050] The embodiments described above are merely illustrative of several implementations of this utility model, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the utility model patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this utility model, and these all fall within the protection scope of this utility model. Therefore, the protection scope of this utility model patent should be determined by the appended claims.

Claims

1. A piezoelectric vibration table, characterized in that: The piezoelectric vibration table includes: The platform includes a top cover and a base, which are connected axially. The platform is hollow to form a receiving part, and the top cover has multiple transmission holes extending through it axially. A pre-tightening elastomer is disposed within the receiving portion and abuts against the bottom of the base; An excitation output shaft, the lower end of which abuts against the preloaded elastic body axially; A piezoelectric ceramic, which is axially held between the excitation output shaft and the top cover; A drive shaft, wherein there are multiple drive shafts arranged around the piezoelectric ceramic, the drive shafts abutting against the excitation output shaft in the axial direction and passing through the drive hole in the axial direction; A transmission platform is disposed above the top cover and is axially abutting against the transmission shaft.

2. The piezoelectric vibration table according to claim 1, characterized in that: The piezoelectric ceramic is disposed in the middle of the excitation output shaft and is coaxial with the excitation output shaft.

3. The piezoelectric vibration table according to claim 1, characterized in that: The multiple drive shafts are arranged in a circular array around the axis of the excitation output shaft.

4. The piezoelectric vibration table according to claim 3, characterized in that: The number of drive shafts is four.

5. The piezoelectric vibration table according to claim 1, characterized in that: The upper surface of the excitation output shaft is recessed to form a limiting hole. The transmission shaft includes a columnar limiting part and a transmission part. The diameter of the transmission part is larger than the diameter of the limiting part. The limiting part is inserted into the limiting hole. The lower end of the transmission part abuts against the excitation output shaft and passes through the transmission hole axially.

6. The piezoelectric vibration table according to claim 5, characterized in that: The transmission unit is fixedly connected to the transmission platform by screws.

7. The piezoelectric vibration table according to claim 1, characterized in that: The pre-tightening elastomer includes an elastic body, an upper shaft disposed above the elastic body, and a lower shaft disposed below the elastic body. The excitation output shaft is recessed in the lower direction to form a first insertion hole, and the bottom of the base is recessed in the lower direction to form a second insertion hole. The upper shaft is inserted into the first insertion hole, and the lower shaft is inserted into the second insertion hole.

8. The piezoelectric vibration table according to claim 1, characterized in that: The pre-tightened elastomer and the base are arranged radially at intervals to form a heat dissipation cavity.

9. The piezoelectric vibration table according to claim 8, characterized in that: The base has a heat dissipation channel that communicates with the heat dissipation cavity.

10. The piezoelectric vibration table according to claim 9, characterized in that: The piezoelectric vibration table also includes a cooling fan, which is arranged adjacent to the heat dissipation channel.

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