CN114018358A

CN114018358A - Tuning fork liquid level switch and vibration device thereof

Info

Publication number: CN114018358A
Application number: CN202010684092.5A
Authority: CN
Inventors: 王瑞; 王定华; 王璞
Original assignee: Wuxi Dinghua Sensor Network Technology Co ltd
Current assignee: Wuxi Dinghua Sensor Network Technology Co ltd
Priority date: 2020-07-16
Filing date: 2020-07-16
Publication date: 2022-02-08

Abstract

The invention provides a tuning fork liquid level switch and a vibrating device thereof, and belongs to the technical field of liquid level measurement. The vibration device includes: the device comprises a vibrating body, a transition body, a piezoelectric element, a pressure welding piece and a fixing piece; the vibrating body is connected with the transition body into a whole, the piezoelectric element is positioned on one side of the transition body, which is far away from the vibrating body, the fixing piece is fixedly connected with the transition body, one end of the crimping piece is connected with the fixing piece, and the other end of the crimping piece presses the piezoelectric element on the transition body. The invention solves the problems that the existing vibrating device has higher cost and the practicability and the reliability need to be improved. The invention is used for monitoring the liquid locus.

Description

Tuning fork liquid level switch and vibration device thereof

Technical Field

The invention relates to the technical field of liquid level measurement, in particular to a tuning fork liquid level switch and a vibrating device thereof.

Background

The tuning fork liquid level switch is used for being installed on the side wall of the storage tank and monitoring whether the liquid to be detected in the storage tank reaches the liquid site where the liquid is located.

The tuning fork level switch includes: the device comprises a host provided with a control circuit, a process connecting piece and a vibrating device, wherein the vibrating device is used for being arranged in the storage tank and detecting liquid in the storage tank, the process connecting piece is used for being connected with the storage tank in a sealing mode, and the host is located outside the storage tank. The vibration device includes: the vibrating body is located on one side of the transition body, and the piezoelectric element is fixedly arranged on the other side of the transition body. In the working process of the tuning fork liquid level switch, after a control circuit in a host applies excitation voltage to a piezoelectric element, the piezoelectric element vibrates at a certain frequency and transmits vibration energy through a transition body to drive a vibration body to vibrate, and the control circuit monitors whether liquid in a storage tank reaches a liquid site or not by monitoring the change of the vibration frequency.

In the vibration device, the fixing method of the piezoelectric element and the transition body includes an adhesive method and a pressure welding method.

Taking the compression joint method as an example, in the existing compression joint method, a tension bolt is welded on one side of the transition body away from the vibrating body, and the piezoelectric elements are sleeved on the tension bolt and are fixed on the transition body through nuts and the tension bolt. However, in the process of manufacturing the vibrating device, the tension bolt needs to be welded on the transition body, and the dimensions of the tension bolt and the transition body are small, so that the welding difficulty and the rejection rate are high, and the cost of the vibrating device is high.

In addition, in the process of welding the tension bolt and the transition body, the material of the transition body is hardened due to welding in the vicinity of the tension bolt, so that the bending rigidity of other members in the vibration device with respect to the transition body is reduced, which is not favorable for the force transmission from the piezoelectric element to the vibration body, and affects the practicability of the vibration device.

In addition, the requirement on the consistency of the multiple piezoelectric elements is high in the working process of the compression joint structure adopting the multiple piezoelectric elements, and the failure of the whole compression joint structure can be caused when any one piezoelectric element fails, so that the reliability of the vibration device is influenced.

Disclosure of Invention

The application provides a tuning fork liquid level switch and vibrating device thereof, can solve among the correlation technique tuning fork liquid level switch's vibrating device's cost higher, practicality, reliability remain the problem that promotes, and technical scheme is as follows:

in one aspect, there is provided a vibration device, including: the device comprises a vibrating body, a transition body, a piezoelectric element, a pressure welding piece and a fixing piece; the vibrating body is connected with the transition body into a whole, the piezoelectric element is positioned on one side of the transition body, which is far away from the vibrating body, the fixing piece is fixedly connected with the transition body, one end of the crimping piece is connected with the fixing piece, and the other end of the crimping piece presses the piezoelectric element on the transition body.

Optionally, the fixing member comprises: the inner side of the fixing ring is provided with an internal thread, the side surface of the disc is provided with an external thread matched with the internal thread, and the fixing ring is connected with the disc in a matched manner; the fixing ring is arranged on one side, far away from the vibrating body, of the transition body, the fixing ring surrounds the piezoelectric element, and one end, far away from the piezoelectric element, of the crimping piece abuts against the disc.

Optionally, the fixing member comprises: the suspension and the two support rods; the two support rods are respectively connected with the suspension frame into a whole at two ends of the suspension frame, the suspension frame is suspended above the piezoelectric element, the two support rods are positioned between the suspension frame and the transition body, and the two support rods are both perpendicular to the transition body.

Optionally, a threaded through hole is provided on the suspension, and the crimping member includes: the adjusting rod is provided with an external thread; the cover bottom cover of the gland is arranged on the piezoelectric element, and the adjusting rod is connected with the threaded through hole in a matched mode, penetrates through the threaded through hole and abuts against the cover top of the gland.

Optionally, one end of each of the two struts, which is far away from the suspension, is provided with an inner buckle extending in a direction close to the other strut, and the inner buckle of each strut is buckled on one side of the transition body, which is close to the vibration body.

Optionally, the fixing further comprises: the fixing ring is fixedly connected with one side of the transition body, which is far away from the vibrating body; one end of each strut, which is far away from the suspension, is provided with an outer buckle extending in the direction far away from the other strut; the inner side of the fixing ring is provided with two limiting grooves and two guide grooves, the two guide grooves extend to one side, close to the suspension, of the fixing ring, the two guide grooves correspond to the two limiting grooves one to one, and each guide groove is communicated with the corresponding limiting groove; the two limiting grooves correspond to the two supporting rods one by one, and the outer buckle on each supporting rod is buckled in the limiting groove corresponding to each supporting rod; the two guide grooves are in one-to-one correspondence with the two supporting rods, and the outer buckles on each supporting rod can enter the limiting grooves corresponding to the supporting rods from the guide grooves corresponding to the outer rods.

Optionally, the transition body comprises: a diaphragm and a surround; the annular wall is perpendicular to the diaphragm and is connected with the diaphragm into a whole in the edge area of the diaphragm, and the vibrating body is connected with the diaphragm into a whole on the side, far away from the annular wall, of the diaphragm.

Optionally, the vibration device further comprises: two insulation matching pieces; in the two insulating matching pieces, one insulating matching piece is positioned between the piezoelectric element and the transition body, and the other insulating matching piece is positioned on one side of the piezoelectric element far away from the one insulating matching piece.

Optionally, the suspension comprises: a suspension plate and a suspension post; the two support rods are respectively arranged at two ends of the suspension plate and connected with the suspension plate into a whole, the suspension column is arranged at one side of the suspension plate, which is far away from the two supports, and connected with the suspension plate into a whole, and the thread through hole penetrates through the suspension plate and the suspension column.

Optionally, a dome is arranged at one end, close to the gland, of the adjusting rod, a spherical groove matched with the shape of the dome is arranged at one end, close to the adjusting rod, of the gland, and the dome abuts against the spherical groove; the outer side surface of the gland is provided with a step, and the bottom surface of the step is flush with the bottom of the gland; and the side surface of the gland is provided with a lead hole for communicating the inside and the outside of the gland.

In another aspect, there is provided a tuning fork liquid level switch, comprising: any one of the above vibrating devices, the tuning fork level switch further comprises: the main frame and the vibrating device are connected through the process connecting piece.

The beneficial effect that technical scheme that this application provided brought is: in the vibrating device that this application provided, in the manufacturing process, can be earlier with mounting and transition piece fixed connection, place piezoelectric element on the transition piece after that, later be connected the one end and the mounting of crimping piece to make the other end of crimping piece press on piezoelectric element, can realize fixing piezoelectric element on the transition body, manufacturing process is simple, has reduced vibrating device's cost. In addition, in the vibrating device, the fixing mode that the fixing piece and the pressing piece are used for pressing the single piezoelectric element on the transition body is adopted, so that the change of material structure and structure caused by welding on the surface of the transition body can be effectively avoided, the change of mechanical property of a vibrating body material can not be caused, the practicability and reliability of the vibrating body can not be influenced, and the practicability and reliability of the vibrating device are improved.

It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the application.

Drawings

In order to illustrate the embodiments of the present invention more clearly, the drawings that are needed in the description of the embodiments will be briefly described below, it being apparent that the drawings in the following description are only some embodiments of the invention, and that other drawings may be derived from those drawings by a person skilled in the art without inventive effort.

Fig. 1 is a schematic structural diagram of a vibration device according to an embodiment of the present invention;

fig. 2 is a schematic structural diagram of another vibration device provided in an embodiment of the present invention;

FIG. 3 is a schematic diagram showing the relative positions of the components in FIG. 2;

fig. 4 is a schematic structural diagram of another vibration device according to an embodiment of the present invention;

fig. 5 is a schematic structural diagram of another vibration device according to an embodiment of the present invention;

fig. 6 is a schematic structural diagram of another vibration device according to an embodiment of the present invention;

FIG. 7 is a schematic diagram showing the relative positions of the components in the support part of FIG. 6;

FIG. 8 is a schematic structural diagram of a transition body and a vibrating body according to an embodiment of the present invention;

FIG. 9 is a schematic structural diagram of a fixing ring, a transition body and a vibrating body according to an embodiment of the present invention;

FIG. 10 is a schematic view of the retaining ring of FIG. 9;

FIG. 11 is a schematic view of the structure of the transition body and the vibrating body of FIG. 10;

FIG. 12 is a schematic structural diagram of a vibrating body, a transition body, a piezoelectric element and an insulating matching sheet according to an embodiment of the present invention;

FIG. 13 is a schematic diagram showing the relative positions of the components of FIG. 12;

FIG. 14 is a schematic structural view of a suspension and strut provided in accordance with an embodiment of the present invention;

FIG. 15 is a schematic structural view of a crimping member according to an embodiment of the present invention;

fig. 16 is a schematic structural diagram of another vibration device according to an embodiment of the present invention;

FIG. 17 is a schematic diagram showing the relative positions of the various components of FIG. 16;

fig. 18 is a schematic structural diagram of another vibration device according to an embodiment of the present invention;

fig. 19 is a schematic diagram showing the relative positional relationship of the respective members in fig. 18.

The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the present application and together with the description, serve to explain the principles of the application.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention clearer, the present invention will be described in further detail with reference to the accompanying drawings, and it is apparent that the described embodiments are only a part of the embodiments of the present invention, not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

Fig. 1 is a schematic structural diagram of a vibration apparatus according to an embodiment of the present invention, and as shown in fig. 1, the vibration apparatus includes: a vibrating body 01, a transition body 02, a piezoelectric element 03, a pressure contact member 04, and a fixing member 05. The vibrating body 01 and the transition body 02 are connected into a whole, the piezoelectric element 03 is located on one side, far away from the vibrating body 01, of the transition body 02, the fixing piece 05 is fixedly connected with the transition body 02, one end of the pressing piece 04 is connected with the fixing piece 05, and the other end of the pressing piece 04 presses the piezoelectric element 03 on the transition body 02.

In summary, in the vibration device provided in the embodiment of the present invention, in the manufacturing process, the fixing element may be fixedly connected to the transition element, the piezoelectric element may be placed on the transition element, and then one end of the pressing element is connected to the fixing element, and the other end of the pressing element is pressed against the piezoelectric element, so that the piezoelectric element may be fixed on the transition element. In addition, in the vibrating device, the fixing mode that the fixing piece and the pressing piece are used for pressing the single piezoelectric element on the transition body is adopted, so that the change of material structure and structure caused by welding on the surface of the transition body can be effectively avoided, the change of mechanical property of a vibrating body material can not be caused, the practicability and reliability of the vibrating body can not be influenced, and the practicability and reliability of the vibrating device are improved.

Optionally, with continued reference to fig. 1, the fixture 05 may include: suspension 051 and two branches 052, wherein, two branches 052 are even as an organic whole with suspension 051 at the both ends of suspension 051 respectively, and suspension 051 is unsettled in piezoelectric element 03 top, and two branches 052 are located between suspension 051 and the transition body 02, and two branches 052 all perpendicular to transition body 02 sets up.

It should be noted that fig. 1 shows only one type of fixing element, and alternatively, the fixing element may have other types of structures.

For example, fig. 2 is a schematic structural diagram of another vibration device provided in an embodiment of the present invention, fig. 3 is a schematic diagram of relative positional relationships among the components in fig. 2, and referring to fig. 2 and fig. 3, on the basis of the vibration body 01, the transition body 02, the piezoelectric element 03, and the pressure-welding member 04 shown in fig. 1, the fixing member 05 may include: a retaining ring 053 and a disk 054.

In the fixing element 05, an internal thread (not shown in fig. 2) is arranged inside the fixing ring 053, an external thread (not shown in fig. 2) matched with the internal thread is arranged on the side surface of the disk 054, the fixing ring 053 is connected with the disk 054 in a matching manner, the fixing ring 053 is arranged on the side of the transition body 02 far away from the vibrating body 01, the fixing ring 053 surrounds the piezoelectric element 03, and one end of the compression joint 04 far away from the piezoelectric element 03 abuts against the disk 054.

It should be noted that the vibration effect of the piezoelectric element under the condition of applying a certain pre-tightening force can be improved greatly, and the pre-tightening forces suitable for different piezoelectric elements are different.

With the structure shown in fig. 2 and 3, the pressing force of the pressing member 04 on the piezoelectric element 03 can be adjusted by adjusting the tightness of the fit between the disc 054 and the fixing ring 053, so that the pretightening force generated by the pressing member 04 on the piezoelectric element 03 can be adjusted within the pretightening force range suitable for the vibration of the piezoelectric element 03, and the vibration effect of the piezoelectric element 03 in the pressed state is improved.

Fig. 4 is a schematic structural diagram of another vibration device according to an embodiment of the present invention, as shown in fig. 4, on the basis that fig. 1 shows a vibration body 01, a transition body 02 and a piezoelectric element 03, a suspension 051 in a fixing member 05 may be provided with a through-hole (not shown in fig. 4), and a crimping member 04 may include: an adjusting rod 041 and a gland 042, wherein the adjusting rod 041 is provided with an external thread (not shown in fig. 4); the cover bottom cover of the gland 042 is arranged on the piezoelectric element 03, and the adjusting rod 041 is connected with and penetrates through the threaded through hole in a matching way and abuts against the cover top of the gland 042.

In such a setting mode, the pressing force of the adjusting rod 041 on the gland 042 can be adjusted by rotating the adjusting rod 041, so that the pretightening force generated by the gland 042 on the piezoelectric element 03 can be adjusted to be within the pretightening force range suitable for the vibration of the piezoelectric element 03, and the vibration effect of the piezoelectric element 03 in a compression joint state is improved.

Fig. 5 is a schematic structural diagram of another vibration device according to an embodiment of the present invention, as shown in fig. 5, in addition to the vibration body 01, the transition body 02, the piezoelectric element 03 and the pressure-welding member 04 shown in fig. 4, in two struts 052 in the fixture 05, an inner buckle a1 extending in a direction approaching the other strut 052 is provided at one end of each strut 052 away from the suspension 051, and the inner buckle a1 of each strut 052 is buckled at one side of the transition body 02 approaching the vibration body 01.

Under such a structure, in the process of assembling the vibration device, after the piezoelectric element 03 and the gland 042 are placed on the transition body 02, the support rod 052 is buckled on one side of the transition body 02 close to the vibration body 01, and the adjusting rod 041 is connected with the suspension 051 in a matching manner, so that the piezoelectric element 03 can be crimped on the fork body, and the convenience in the assembling process is improved.

Fig. 6 is a schematic structural diagram of another vibration device according to an embodiment of the present invention, and fig. 7 is a schematic relative position relationship diagram of each component in the supporting portion in fig. 6. Referring to fig. 6 and 7, in addition to the vibrating body 01, the transition body 02, the piezoelectric element 03, and the pressure-bonding member 04 shown in fig. 4, the fixing member may further include: and the fixing ring 053 is fixedly connected with one side of the transition body 02 far away from the vibrating body 01.

Of the two struts 052, one end of each strut 052 away from the suspension 051 is provided with an outer buckle A2 extending in a direction away from the other strut 052. The inboard of solid fixed ring 053 is provided with two spacing grooves B1 and two guide groove B2, and these two guide groove B2 all extend to solid fixed ring 053 and are close to one side of suspension 051, and two guide groove B2 and two spacing grooves B1 one-to-one, every guide groove B2 all communicates with the spacing groove B1 that corresponds.

The two limit grooves B1 correspond to the two supporting rods 052 one by one, and the outer buckles A2 on each supporting rod 052 are buckled in the limit grooves B1 corresponding to the supporting rods 052.

Under the structure, the two supporting rods 052 are limited in the two limiting grooves B1 on the inner wall of the fixing ring 053, so that the suspension 051 and the adjusting rod 041 can be limited to move or swing, and the stability of the crimping structure is improved.

In addition, the two guide grooves B2 correspond to the two struts 052 one by one, and the outer buckles a2 on each strut 052 can enter the limiting grooves B1 corresponding to the struts 052 from the guide grooves B2 corresponding to the struts 052.

Under the mode of so setting, with solid fixed ring 053 and transition body 02 fixed connection back, can be with in the outer knot A2 of branch 052 is introduced spacing groove B1 from the guide groove B2 that corresponds, improved the convenience of installation. Alternatively, the fixing ring 053 and the transition body 02 may be fixedly connected by welding.

Fig. 8 is a schematic structural diagram of a transition body and a vibrating body according to an embodiment of the present invention, and as shown in fig. 8, the transition body 02 may include: a membrane 021 and a ring wall 022, wherein the ring wall 022 is perpendicular to the membrane 021 and is connected with the membrane 021 into a whole in the edge area of the membrane 021, and the vibrating body 01 is connected with the membrane 021 into a whole on the side of the membrane 021 far away from the ring wall 022.

In this way, the annular wall 022 can surround the piezoelectric element to restrict the movement of the piezoelectric element in the radial direction, thereby further improving the stability of the pressure bonding structure.

It should be noted that the transition body shown in fig. 8 and the arrangement manner of the transition body with respect to other components may be applied to any of the vibration devices described above, and the embodiment of the present invention is not limited thereto.

Fig. 9 is a schematic structural diagram of a fixing ring, a transition body and a vibrating body according to an embodiment of the present invention, fig. 10 is a schematic structural diagram of the fixing ring in fig. 9, and fig. 11 is a schematic structural diagram of the transition body and the vibrating body in fig. 10.

Referring to fig. 9 to 11, the fixing ring 053 is coaxial and fixedly connected to the ring wall 022, a positioning protrusion B3 is disposed on a side of the fixing ring 053 close to the ring wall 022, a ring-shaped positioning slot C1 is disposed on an inner wall of the ring wall 022 close to the fixing ring 053, and the positioning protrusion B3 is disposed in the ring-shaped positioning slot C1. In the two limiting grooves B1, each limiting groove B1 extends to the side of the fixing ring 053 close to the ring wall 022, and the inner diameter of the limiting groove B1 is smaller than that of the ring wall 022.

With such an arrangement, when the fixing ring 053 and the transition body 02 are fixedly connected, the positioning protrusion B3 on the fixing ring 053 can be inserted into the annular positioning groove C21 on the ring wall 022 in the transition body 02, and then the fixing ring 053 and the ring wall 022 are fixed together by using a fixing method such as welding, which is helpful for improving the portability of the installation process. In addition, since the limiting groove B1 extends to the side of the fixing ring 053 close to the ring wall 022, and the inner diameter of the limiting groove B1 is smaller than that of the ring wall 022, the ring wall 022 can limit the pole in the axial direction after the pole is buckled in the limiting groove B1.

It should be noted that the fixing ring and the transition body shown in fig. 9 to 11, and the arrangement of both with respect to other components, can be applied to the vibration device shown in fig. 6 and 7.

Fig. 12 is a schematic structural diagram of a vibrating body, a transition body, a piezoelectric element and an insulating matching sheet according to an embodiment of the present invention, and fig. 13 is a schematic relative positional relationship between the components in fig. 12.

Referring to fig. 12 and 13, the vibration device may further include: and two insulating matching sheets 06, wherein one insulating matching sheet 06 of the two insulating matching sheets 06 is positioned between the piezoelectric element 03 and the transition body 02, and the other insulating matching sheet 06 is positioned on one side of the piezoelectric element 03 far away from the one insulating matching sheet 06.

In the vibrating device, the transition body and the crimping piece are usually conductors (the transition body and the crimping piece are usually made of metal), and in order to ensure that the piezoelectric element can work normally, insulating matching pieces can be arranged between the piezoelectric element and the transition body and on one side of the piezoelectric element far away from the transition body so as to insulate two sides of the piezoelectric element. When the transition body and the crimping block in the vibration device are both insulating pieces, insulating matching pieces can be arranged between the piezoelectric element and the transition body and on one side of the piezoelectric element far away from the transition body in the vibration device, or the insulating matching pieces are not arranged, and the embodiment of the invention does not limit the arrangement.

Optionally, the thermal expansion coefficient of the insulating matching sheet between the piezoelectric element and the transition body is between the thermal expansion coefficients of the piezoelectric element and the transition body, and the thermal expansion coefficient of the insulating matching sheet on the side of the piezoelectric element far away from the transition body is between the thermal expansion coefficients of the piezoelectric element and the transition body. Therefore, in the working process of the vibration device, under a high-temperature environment, the thermal deformation amount from the crimping piece to the piezoelectric element to the transition body is consistent, the pretightening force applied to the piezoelectric element is not easy to loose, and the working performance of the vibration device is further improved.

Optionally, the elastic modulus of the insulating matching sheet between the piezoelectric element and the transition body is between the elastic moduli of the piezoelectric element and the transition body, and the elastic modulus of the insulating matching sheet on the side of the piezoelectric element far away from the transition body is between the elastic moduli of the piezoelectric element and the transition body. Therefore, in the working process of the vibration device, the elastic deformation from the crimping piece to the piezoelectric element to the transition body is consistent, the energy transfer efficiency from the crimping piece to the piezoelectric element to the transition body is improved, and the working performance of the vibration device is further improved.

It should be noted that the two insulation matching pieces shown in fig. 12 and 13 and the arrangement of the two insulation matching pieces with respect to other components may be applied to any of the vibration devices described above, and the embodiment of the present invention is not limited thereto.

Fig. 14 is a schematic structural diagram of a suspension and a strut according to an embodiment of the present invention, and as shown in fig. 14, the suspension 051 may include: the suspension plate D1 and suspension column D2, two spinal branch bars 052 are even as an organic whole with suspension plate D1 with the both ends of suspension plate D1 respectively, and suspension column D2 is even as an organic whole with suspension plate D1 in one side that suspension plate D1 kept away from two spinal branch bars 052, and screw through-hole K1 runs through suspension plate D1 and suspension column D2.

Under such structure, after adjusting pole and suspension 051 cooperation and connecting, adjust the pole and can be restricted by hanger plate D1 and hanging post D2 simultaneously, promoted the regional of adjusting the pole by the restriction, help promoting the steadiness of adjusting the pole.

It should be noted that fig. 14 only illustrates that the suspension plate D1 is fixedly connected to the support rod 052 provided with the external buckles, and the suspension plate in fig. 14 may also be applied to any vibration device provided with the suspension described above, which is not limited in the embodiment of the present invention.

Referring to fig. 14, in the two support rods 052, the surface of each support rod 052 away from the other support rod 052 is an arc surface, and the shape of the arc surface can be matched with the shape of the inner wall of the fixing ring in the vibration device where the two support rods are located; in addition, in the two struts 052, the surface of each strut 052 close to the other strut 052 may also be an arc surface, and the shape of the arc surface may match the shape of the side surface of the gland.

Under the mode of so setting, at the in-process of putting into solid fixed ring's spacing groove with branch 052 to and at the in-process of adjusting branch 052 for solid fixed ring's position, branch 052 is close to the solid fixed ring's of laminating inner wall that solid fixed ring's surface can be better, and branch 052 is close to the surface of the laminating gland that the surface of gland also can be better, conveniently adjusts the removal to branch 052, can avoid solid fixed ring's inner wall and the side of gland by the edge fish tail of branch 052 simultaneously.

It should be noted that the two struts 052 shown in fig. 14 may be applied to the vibration device shown in fig. 6 and 7, which is not limited in the embodiment of the present invention.

Fig. 15 is a schematic structural diagram of a crimping piece according to an embodiment of the present invention, as shown in fig. 15, in the crimping piece, one end of the adjusting rod 041 near the gland 042 is provided with a dome E1, one end of the gland 042 near the adjusting rod 041 is provided with a spherical groove E2 matching with the shape of the dome E1, and the dome E1 abuts in the spherical groove E2; a step E3 is arranged on the outer side surface of the gland 042, and the bottom surface of the step E3 is flush with the bottom of the gland 042; the side of the gland 042 is provided with a lead hole E4 for communicating the inside and the outside of the gland.

Under the mode of setting like this, globular recess E2 can carry on spacingly to dome E1, and then can restrict the displacement of adjusting pole 041, improves the steadiness of crimping structure. Moreover, the dome E1 and the spherical groove E2 are in arc surface contact, and the contact manner can make the adjusting rod 041 and the gland 042 fully contact in multiple directions such as axial direction, radial direction and oblique direction, so that the pressing force between the adjusting rod 041 and the gland 042 can be transmitted in the multiple directions, further the stress generated between the adjusting rod 041 and the gland 042 can be dispersed, the deformation of the adjusting rod 041 and the gland 042 due to the stress concentration between the gland 042 and the adjusting rod 041 is avoided, and further the influence of the gland 042 on the crimping effect of the piezoelectric element is avoided. In addition, the contact manner can effectively reduce the shear stress between the adjusting rod 041 and the gland 042, so as to reduce the energy loss caused by the shear stress in the vibration process of the piezoelectric element, and improve the working efficiency of the compression joint structure.

In addition, the step E3 at the outer side of the gland 042 can increase the contact area of the gland 042 with the edge area of the piezoelectric element, and helps to promote the gland 042 to compact the edge area of the piezoelectric element, so that the piezoelectric element is not easy to shift relative to the gland 042 during vibration, and helps to promote the stability of the crimping structure.

Also, the lead wire connecting the piezoelectric element can be led out from the lead hole E4 on the side surface of the cover 042, avoiding the cover 042 from pressing the lead wire. The vibration device further comprises a circuit board, and the circuit board is connected with the piezoelectric element through a lead and is used for exciting the piezoelectric element through the lead to generate vibration.

Optionally, an end of the adjusting rod 041 away from the gland 042 is provided with an adjusting cap E5. Under this structure, can adjust regulating part 041 through adjusting the cap and to the effect that compresses tightly of gland 042, help promoting the convenience of accommodation process.

It should be noted that, the components in the vibration device shown in fig. 1 to fig. 15 may be combined into a new vibration device with reference to the above arrangement mode, which is not limited in the embodiment of the present invention.

Fig. 16 is a schematic structural diagram of another vibration device according to an embodiment of the present invention, and fig. 17 is a schematic relative position relationship diagram of each component in fig. 16. The vibration device shown in fig. 16 and 17 is composed of the press-contact member 04 and the fixing member 05 in fig. 5, the vibration body 01 and the transition body 02 shown in fig. 8, and the piezoelectric element 03 and the two insulating matching pieces 06 shown in fig. 12 and 13.

Fig. 18 is a schematic structural diagram of another vibration device according to an embodiment of the present invention, and fig. 19 is a schematic relative positional relationship diagram of each component in fig. 18. The vibrating device shown in fig. 18 and 19 is composed of a vibrating body 01, a transition body 02, and a fixing ring 053 in a fixing member 05 shown in fig. 9 to 11, a piezoelectric element 03 and two insulating matching pieces 06 shown in fig. 12 and 13, a fixing member 05 suspension 051 and two stays 051 shown in fig. 14, and a pressing rod 041 and a pressing cover 042 in a crimping member 04 shown in fig. 15.

The embodiment of the invention also provides a tuning fork liquid level switch, which comprises: any one of the above vibrating devices, the tuning fork level switch further comprises: the main frame and the process connecting piece are connected, wherein the main frame and the vibrating device are connected through the process connecting piece.

Other embodiments of the invention will be apparent to those skilled in the art from consideration of the specification and practice of the invention disclosed herein. This application is intended to cover any variations, uses, or adaptations of the invention following, in general, the principles of the invention and including such departures from the present disclosure as come within known or customary practice within the art to which the invention pertains. It is intended that the specification and examples be considered as exemplary only, with a true scope and spirit of the invention being indicated by the following claims.

It will be understood that the invention is not limited to the precise arrangements described above and shown in the drawings and that various modifications and changes may be made without departing from the scope thereof. The scope of the invention is limited only by the appended claims.

Claims

1. A vibrating device, characterized in that, the vibrating device comprises: a vibrating body, a transition body, a piezoelectric element, a crimping member and a fixing member;

The vibrating body is integrated with the transition body, the piezoelectric element is located on the side of the transition body away from the vibrating body, the fixing member is fixedly connected to the transition body, and the crimping member is One end is connected with the fixing piece, and the other end of the crimping piece presses the piezoelectric element on the transition body.

2 . The vibration device according to claim 1 , wherein the fixing member comprises: a fixing ring and a disc, an inner thread is provided on the inner side of the fixing ring, and a side surface of the disc is provided with an inner thread corresponding to the inner thread. 3 . a matching external thread, the fixing ring is connected with the disc;

The fixing ring is arranged on a side of the transition body away from the vibrating body, and the fixing ring surrounds the piezoelectric element, and one end of the crimping member away from the piezoelectric element abuts on the disc superior.

3. The vibration device according to claim 1, wherein the fixing member comprises: a suspension and two struts;

The two struts are respectively connected with the suspension at both ends of the suspension, the suspension is suspended above the piezoelectric element, and the two struts are located between the suspension and the suspension. Between the transition bodies, the two struts are arranged perpendicular to the transition bodies.

4 . The vibration device according to claim 3 , wherein a threaded through hole is provided on the suspension, the crimping member comprises: an adjusting rod and a press cover, and an external thread is provided on the adjusting rod; 5 .

The cover bottom of the pressing cover is covered on the piezoelectric element, and the adjusting rod is connected with the threaded through hole and penetrates through the threaded through hole, and abuts on the cover top of the pressing cover.

5 . The vibration device according to claim 4 , wherein among the two struts, one end of each strut away from the suspension is provided with an inner buckle extending toward the other strut. 6 . , the inner buckle of each strut is buckled on the side of the transition body close to the vibrating body.

6 . The vibration device according to claim 4 , wherein the fixing member further comprises: a fixing ring, the fixing ring is fixedly connected to a side of the transition body away from the vibration body; 6 .

Among the two struts, one end of each strut away from the suspension is provided with an outer buckle extending in a direction away from the other strut;

The inner side of the fixing ring is provided with two limiting grooves and two guiding grooves. The two limit slots are in one-to-one correspondence, and each guide slot is communicated with the corresponding limit slot;

The two limit grooves are in one-to-one correspondence with the two support rods, and the outer buckles on each support rod are buckled in the limit grooves corresponding to each support rod;

The two guide grooves are in one-to-one correspondence with the two support rods, and the outer buckle on each support rod can enter the limit groove corresponding to each support rod from the guide groove corresponding to each outer rod Inside.

7. The vibration device according to claim 1, wherein the transition body comprises: a diaphragm and a ring wall;

The ring wall is perpendicular to the diaphragm, and is integrally connected with the diaphragm at the edge region of the diaphragm, and the vibrating body is connected to the diaphragm on the side of the diaphragm away from the ring wall. Pieces together.

8. The vibration device according to any one of claims 3 to 6, wherein the suspension comprises: a suspension plate and a suspension column;

The two struts are respectively connected with the suspension plate at both ends of the suspension plate, and the suspension column is connected with the suspension plate at the side of the suspension plate away from the two brackets. , and the threaded through hole penetrates the suspension plate and the suspension column.

9. The vibration device according to any one of claims 4 to 6, characterized in that, one end of the adjusting rod close to the pressure cover is provided with a dome, and one end of the pressure cover close to the adjusting rod is provided with a dome. a spherical groove matching the shape of the dome, and the dome abuts in the spherical groove;

The outer side of the press cover is provided with a step, and the bottom surface of the step is flush with the bottom of the lid; the side of the press cover is provided with a lead hole connecting the inside and outside of the press cover.

10. A tuning fork liquid level switch, characterized in that, the tuning fork liquid level switch comprises: the vibration device according to any one of claims 1 to 9, and the tuning fork liquid level switch further comprises: a main engine and a process connection, the The host and the vibration device are connected through the process connection.