Piezoelectric stack bonding tool

Abstract

The invention belongs to the field of piezoelectric ceramic processing, and discloses a piezoelectric stack bonding tool, which comprises a jig seat assembly used for bearing a stacked piezoelectric assembly and provided with a guide structure, and the guide structure is used for limiting the stacked piezoelectric assembly to be placed along a first direction; the linear pressure applying module is arranged on one side of the jig seat assembly and is provided with a driving end capable of stretching out and drawing back in the first direction, the driving end of the linear pressure applying module is provided with a first ejector block, the first ejector block is provided with a first abutting part, and the first abutting part is matched with the outer end face, away from the piezoelectric stack, of the first pressure head; and the second ejector block is arranged on the other side of the jig seat assembly, the second ejector block is provided with a second abutting part, and the second abutting part is matched with the outer end face, away from the piezoelectric stack, of the second pressing head. According to the piezoelectric stack bonding tool provided by the invention, the stress symmetry degree and the stress uniformity of the stacked piezoelectric assembly can be ensured, and the influence on the use performance and the service life of the piezoelectric stack is avoided.

Description

Technical Field

[0001] The present invention relates to the field of piezoelectric ceramic processing, in particular to a piezoelectric stack bonding tool. Background Art

[0002] The high-speed piezoelectric jet valve is a device that uses the piezoelectric effect to achieve extremely fast and precise fluid dispensing / injection control. It is particularly suitable for micro-liter or nanoliter-level micro-volume, high-speed, non-contact dispensing applications. In particular, it is widely used in high-end electronic manufacturing fields that require precise micro-volume dispensing.

[0003] The piezoelectric ceramic actuator is a key component of the high-speed piezoelectric injection valve. It consists of a piezoelectric stack bonded to the pressure heads at both ends. Due to the non-planar structure of the outer end of the pressure head, it is difficult to ensure symmetry and force uniformity during bonding and pressure maintenance, which will cause uneven force on the piezoelectric stack and affect the performance and life of the piezoelectric stack.

[0004] Therefore, there is an urgent need for a piezoelectric stack bonding tool to solve the above technical problems. Summary of the Invention

[0005] The object of the present invention is to provide a piezoelectric stack bonding tool that can ensure the force symmetry and force uniformity of the stacked piezoelectric component and avoid affecting the performance and life of the piezoelectric stack.

[0006] To achieve this object, the present invention adopts the following technical solutions:

[0007] A piezoelectric stack bonding tool is provided for fixing a stacked piezoelectric assembly, wherein the stacked piezoelectric assembly includes a piezoelectric stack and a first pressure head bonded to one end of the piezoelectric stack and a second pressure head bonded to the other end of the piezoelectric stack. The piezoelectric stack bonding tool comprises:

[0008] base;

[0009] A fixture seat assembly is mounted on the base and is used to support the stacked piezoelectric assembly. The fixture seat assembly is provided with a guide structure, and the guide structure is used to limit the stacked piezoelectric assembly to be placed along a first direction;

[0010] a linear pressure module, disposed on one side of the fixture base assembly, having a driving end capable of moving along the first direction, a first top block being mounted on the driving end of the linear pressure module, the first top block being provided with a first pressing portion, the first pressing portion being adapted to an outer end surface of the first pressing head facing away from the piezoelectric stack, the linear pressure module being capable of driving the first pressing portion to fit into the outer end surface of the first pressing head, so as to apply pressure to the first pressing head along the first direction and toward the second pressing head;

[0011] The second top block is arranged relative to the first top block in the first direction, and the second top block is provided with a second pressing portion. The second pressing portion is adapted to the outer end surface of the second pressure head facing away from the piezoelectric stack, and the pressing surface of the second pressing portion facing the side of the piezoelectric stack can be fitted with the outer end surface of the second pressure head facing the second pressing portion. Under the cooperation of the linear pressure module and the first pressing portion, the second pressing portion applies pressure to the second pressure head along the first direction and toward the first pressure head.

[0012] As an optional technical solution, the piezoelectric stack bonding tool further includes:

[0013] a pressure detection member, provided between the driving end of the linear pressure module and the first top block, for detecting the pressure applied to the first top block in a first direction;

[0014] A micrometer screw is mounted on the base, and the second top block is mounted on the telescopic shaft of the micrometer screw. The telescopic shaft of the micrometer screw can be telescoped along a first direction to adjust the pressure borne by the stacked piezoelectric component in the first direction.

[0015] As an optional technical solution, the second top block includes a connecting shaft portion and a second top head portion, the connecting shaft portion is provided with a locking cavity, the telescopic shaft of the screw micrometer extends into and is locked in the locking cavity, the second pressing portion is provided at one end of the second top head portion away from the connecting shaft portion, and the connecting shaft portion and the second top head portion are integrally formed.

[0016] As an optional technical solution, the first pressing portion is configured as a spherical groove structure to adapt to the outer end surface of the first pressure head configured as a spherical structure; and / or

[0017] The second pressing portion is configured as a V-shaped groove structure to adapt to the outer end surface of the second pressing head configured as a V-shaped convex structure.

[0018] As an optional technical solution, the fixture seat assembly includes two fixture seats symmetrically arranged along the first direction, and the fixture seats are provided with limit blocks. The two limit blocks support and limit the first pressure head and the second pressure head in a one-to-one correspondence. The guide structure includes:

[0019] a guide groove, passing through the limit block along a first direction, the first pressing head or the second pressing head being accommodated in the guide groove, and two side walls of the guide groove respectively being in contact with two side surfaces of the first pressing head or the second pressing head along a horizontal direction perpendicular to the first direction;

[0020] Two limiting walls are respectively provided on both sides of the guide groove close to the port of the other fixture seat, and the two limiting walls are respectively attached to the two side surfaces of the piezoelectric stack along a horizontal direction perpendicular to the first direction.

[0021] As an optional technical solution, the first top block and the second top block are respectively inserted into the corresponding guide grooves, and first bearing steps are provided on both sides of the bottom of the guide grooves. The first bearing steps are arranged to extend in the same direction as the guide grooves, and the first bearing steps are used to support the first pressure head or the second pressure head. The gap between the two first bearing steps is used to avoid the first top block or the second top block.

[0022] The inner sides of the two limiting walls are each provided with a second bearing step, and the second bearing step is used to support the piezoelectric stack.

[0023] As an optional technical solution, the base is provided with a plurality of first connection holes, the fixture seat is provided with a plurality of second connection holes, and the fixture seat and the base are connected by fasteners that are simultaneously provided through the first connection holes and the second connection holes;

[0024] The diameter of the second connecting hole is larger than the diameter of the first connecting hole and the outer diameter of the fastener.

[0025] As an optional technical solution, the linear pressure module includes:

[0026] A screw-nut assembly comprises a transmission screw and a transmission nut in threaded engagement, wherein the transmission screw extends in a first direction and is rotatably disposed on the base, and a handwheel is mounted on one end of the transmission screw;

[0027] a guide slide bar extending along a first direction and fixed to the base;

[0028] The slider is connected to the transmission nut and is slidably arranged on the guide slide bar. The first top block is fixed to the slider through a first mounting seat.

[0029] As an optional technical solution, the slider is provided with a guide hole for the guide slide rod to pass through, and the slider is also provided with two locking parts, the guide hole is passed through the two locking parts, one of the locking parts is provided with a locking hole, and the other locking part is provided with a mounting hole, and the linear pressure module also includes a locking screw, which is passed through the mounting hole and threadedly connected to the locking hole. By screwing the locking screw, the two locking parts can selectively clamp the guide slide rod.

[0030] As an optional technical solution, the base includes a bottom plate and a mounting frame, the bottom plate is provided with a first positioning groove and a second positioning groove, the mounting frame is locked in the first positioning groove, the linear pressure module is locked in the second positioning groove, and an avoidance hole is formed between the bottom plate and the mounting frame for avoiding the telescopic movement of the linear pressure module, the jig seat assembly and the second top block are both provided on the mounting frame.

[0031] Beneficial effects of the present invention:

[0032] The piezoelectric stack bonding fixture provided by the present invention is used to fix the stacked piezoelectric component after glue coating, so that the glue layer between the two ends of the piezoelectric stack and the corresponding pressure head is solidified under a certain pressure. During this process, the jig seat assembly carries the stacked piezoelectric component and limits the stacked piezoelectric component to be placed in a first direction through the guide structure thereon. On one side of the jig seat assembly, the linear pressure module drives the first top block to press against the outer end face of the first pressure head in the first direction. On the other side of the jig seat assembly, the second top block presses against the outer end face of the second pressure head in the first direction. Since the first pressing portion on the first top block is in contact with the outer end face of the first pressure head and the second pressing portion on the second top block is in contact with the outer end face of the second pressure head, the direction of the pressure applied by the linear pressure module can be maintained in the first direction. In summary, the piezoelectric stack bonding fixture provided by the present invention can make the pressure direction of the stacked piezoelectric component the same as the placement direction, ensure the force symmetry and force uniformity of the stacked piezoelectric component, and avoid affecting the performance and life of the piezoelectric stack. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] Figure 1 It is a structural diagram of a stacked piezoelectric component;

[0034] Figure 2 It is a structural schematic diagram of the piezoelectric stack bonding tool provided by the present invention;

[0035] Figure 3 is a top view of the piezoelectric stack bonding tool provided by the present invention;

[0036] Figure 4 It is a partial structural decomposition schematic diagram of the piezoelectric stack bonding tool provided by the present invention;

[0037] Figure 5 It is a structural schematic diagram of the fixture base provided by the present invention;

[0038] Figure 6 This is a partial structural cross-sectional view of the piezoelectric stack bonding tool provided by the present invention;

[0039] Figure 7 It is a structural schematic diagram of the first top block provided by the present invention;

[0040] Figure 8is a structural schematic diagram of the second top block provided by the present invention;

[0041] Figure 9 It is a structural schematic diagram of the linear pressure module provided by the present invention;

[0042] Figure 10 is a cross-sectional view of the linear pressure module provided by the present invention;

[0043] Figure 11 It is a structural schematic diagram of the base plate provided by the present invention.

[0044] In the picture:

[0045] 100, stacked piezoelectric assembly; 101, piezoelectric stack; 102, first indenter; 103, second indenter;

[0046] 10. Base; 11. Bottom plate; 111. First positioning slot; 112. Second positioning slot; 12. Mounting bracket; 121. First connecting hole; 122. First mounting slot; 123. Third connecting hole; 124. Second mounting slot;

[0047] 20. Fixture seat; 21. Limit block; 22. Guide groove; 23. Limit wall; 24. First bearing step; 25. Second bearing step; 26. Glue overflow groove; 27. Second connecting hole;

[0048] 30. First top block; 31. First pressing portion; 32. Screw portion; 33. First top portion; 34. Stop portion;

[0049] 40. Second top block; 41. Second pressing portion; 42. Coupling portion; 43. Second top portion; 44. Locking countersunk hole;

[0050] 50. Linear pressure module; 51. Base; 52. Screw nut assembly; 53. Guide slide; 54. Slider; 541. Locking portion; 5411. Locking hole; 5412. Mounting hole; 55. Locking screw; 56. Locking handle; 57. Handwheel;

[0051] 60. Pressure detection member; 61. First mounting seat;

[0052] 70. Micrometer screw; 71. Second mounting seat; 711. Fourth connecting hole. DETAILED DESCRIPTION

[0053] The present invention will be further described in detail below with reference to the accompanying drawings and examples. It will be understood that the specific embodiments described herein are intended only to illustrate the present invention and are not intended to limit the present invention. It should also be noted that, for ease of description, the accompanying drawings only illustrate portions relevant to the present invention, not all structures.

[0054] In the description of the present invention, unless otherwise expressly specified or limited, the terms "connected," "connected," and "fixed" should be understood in a broad sense. For example, they may refer to fixed connections, detachable connections, or integration; mechanical connections or electrical connections; direct connections or indirect connections through an intermediate medium; and internal communication between two components or interaction between two components. Those skilled in the art will understand the specific meanings of the above terms in the present invention in specific circumstances.

[0055] In the present invention, unless otherwise expressly specified or limited, a first feature being "above" or "below" a second feature may include the first and second features being in direct contact, or may include the first and second features being in contact not directly but through another feature between them. Furthermore, a first feature being "above," "above," and "above" a second feature may include the first feature being directly above or obliquely above the second feature, or may simply mean that the first feature is higher in level than the second feature. A first feature being "below," "below," and "below" a second feature may include the first feature being directly below or obliquely below the second feature, or may simply mean that the first feature is lower in level than the second feature.

[0056] In the description of this embodiment, the terms "upper," "lower," "right," and other orientations or positional relationships are based on the orientations or positional relationships shown in the accompanying drawings and are intended solely for ease of description and simplified operation. They do not indicate or imply that the devices or components referred to must have, be constructed, or operate in a specific orientation. Therefore, they should not be construed as limitations on the present invention. Furthermore, the terms "first" and "second" are used solely for descriptive purposes and have no special meanings.

[0057] This embodiment provides a piezoelectric stack bonding tool for Figure 1 The glue-coated stacked piezoelectric component 100 is fixed so that the adhesive layer between the two ends of the piezoelectric stack 101 and the corresponding pressure head is solidified under a certain pressure. Figure 1 The stacked piezoelectric assembly 100 includes a piezoelectric stack 101 and two pressure heads bonded to the two ends of the piezoelectric stack 101. Before the stacked piezoelectric assembly 100 is placed on the piezoelectric stack bonding fixture, an uncured adhesive layer is applied between the two ends of the piezoelectric stack 101 and the corresponding pressure heads. Figure 2-Figure 11The piezoelectric stack bonding tool includes a base 10 and a jig seat assembly installed on the base 10, a linear pressure module 50, a first top block 30 and a second top block 40, wherein the base 10 includes a bottom plate 11 and a mounting frame 12, the mounting frame 12 is fixed on the bottom plate 11, the jig seat assembly is fixed to the mounting frame 12, and is used to carry the stacked piezoelectric component 100, the linear pressure module 50 is fixed to the bottom plate 11, and is arranged on one side of the jig seat assembly along the first direction, the linear pressure module 50 has a driving end that can move along the first direction, the first top block 30 is installed at the driving end of the linear pressure module 50, the second top block 40 is provided on the other side of the jig seat assembly along the first direction, and is arranged relative to the first top block 30 in the first direction. Under the drive of the linear pressure module 50, the first top block 30 and the second top block 40 respectively press the two pressure heads of the stacked piezoelectric component 100 along the first direction.

[0058] For further information, please refer to Figure 1 The press head includes a first press head 102 and a second press head 103. The outer end surfaces of the first press head 102 and the outer end surfaces of the second press head 103 have different shapes. The fixture base assembly is provided with a guide structure for limiting the stacked piezoelectric assembly 100 to be placed along a first direction; the first top block 30 is provided with a first pressing portion 31, which is adapted to the outer end surface of the first press head 102 facing away from the piezoelectric stack 101; the second top block 40 is provided with a second pressing portion 41, which is adapted to the outer end surface of the second press head 103 facing away from the piezoelectric stack 101. With the cooperation of the linear pressure module 50 and the first pressing portion 31, the first pressing portion 31 is attached to the outer end surface of the first pressing head 102 to apply pressure to the first pressing head 102 along the first direction and toward the second pressing head 103, and the outer end surface of the second pressing head 103 is attached to the second pressing portion 41, and the second pressing portion 41 applies pressure to the second pressing head 103 along the first direction and toward the first pressing head 102.

[0059] Specifically, during the operation of the piezoelectric stack bonding tool provided in this embodiment, the jig seat assembly carries the stacked piezoelectric assembly 100 and limits the stacked piezoelectric assembly 100 to be placed along the first direction through the guide structure thereon. On one side of the jig seat assembly, the linear pressure module 50 drives the first top block 30 to press against the outer end surface of the first pressure head 102 along the first direction. On the other side of the jig seat assembly, the second top block 40 presses against the outer end surface of the second pressure head 103 along the first direction. Since the first pressing portion 31 on the first top block 30 is in contact with the outer end surface of the first pressure head 102, and the second pressing portion 41 on the second top block 40 is in contact with the outer end surface of the second pressure head 103, the direction of the pressure applied by the linear pressure module 50 can be maintained in the first direction. In summary, the piezoelectric stack bonding tool provided in this embodiment can make the pressure direction of the stacked piezoelectric component 100 the same as the placement direction, ensuring the force symmetry and force uniformity of the stacked piezoelectric component 100, and avoiding affecting the performance and life of the piezoelectric stack 101.

[0060] In this embodiment, please refer to Figure 1 and Figure 7 The outer end surface of the first pressure head 102 is set to a spherical convex structure, and the first pressing portion 31 is set to a spherical groove structure to adapt to the outer end surface of the first pressure head 102 set to a spherical structure. It should be noted that the adaptation between the first pressing portion 31 and the outer end surface of the first pressure head 102 mentioned in this embodiment refers to the adaptation of the two in shape and size. Specifically, the two are spherical structures with one convex and one concave that are adapted in shape, and the spherical radii are equal in size or the spherical radius of the first pressing portion 31 is slightly larger than the spherical radius of the first pressure head 102 to ensure that the first pressing portion 31 can be fully attached to the outer end surface of the first pressure head 102.

[0061] In this embodiment, please refer to Figure 1 and Figure 8The horizontal cross-section of the second pressing head 103 is configured as a truncated triangular structure, with its top cut off by a straight edge or an arc edge, and symmetrically arranged inclined surfaces on both sides of the top forming a V-shaped convex structure. The second pressing portion 41 is configured as a V-shaped groove structure having two symmetrically arranged inclined surfaces to adapt to the outer end surface of the second pressing head 103 configured as a V-shaped convex structure. Similarly, the adaptation between the second pressing portion 41 and the outer end surface of the second pressing head 103 described in this embodiment refers to the adaptation of the two in both shape and size. Specifically, the two are shaped as a matching V-shaped symmetrical surface structure with one convex and one concave. In terms of size, the angles between the two inclined surfaces of each set of V-shaped symmetrical surface structures are equal, ensuring that the two inclined surfaces of the second pressing portion 41 can be respectively attached to the two inclined surfaces of the second pressing head 103. Furthermore, the two inclined surfaces of the second pressing portion 41 are symmetrically distributed in the vertical direction to help define the vertical position of the second pressing head 103 when under pressure and to maximize the uniformity of force on its upper and lower surfaces.

[0062] For example, please refer to Figure 2-Figure 4 The jig seat assembly includes two jig seats 20 symmetrically arranged along a first direction. The jig seats 20 are provided with limit blocks 21. The two limit blocks 21 support and limit the two pressure heads in a one-to-one correspondence, that is, one limit block 21 supports and limits the first pressure head 102, and the other limit block 21 supports and limits the second pressure head 103. In addition, the two limit blocks 21 also jointly support and limit the piezoelectric stack 101. The advantage of providing two jig seats 20 is that the spacing between the two jig seats 20 can be adjusted according to the different thicknesses of the adhesive layer, the length of the piezoelectric stack 101, or the spacing between the first pressure head 102 and the second pressure head 103, thereby adapting to the production of more models and types of stacked piezoelectric assemblies 100 and improving versatility.

[0063] For details, please refer to Figure 3 and Figure 4 The mounting frame 12 of the base 10 is provided with a first mounting slot 122. Both fixture bases 20 are mounted in the first mounting slot 122. The first mounting slot 122 is provided with a plurality of first connection holes 121. The fixture base 20 is provided with a plurality of second connection holes 27. The fixture base 20 and the mounting frame 12 are connected by fasteners that penetrate both the first connection holes 121 and the second connection holes 27. The aperture of the second connection hole 27 is larger than the aperture of the first connection hole 121 and the outer diameter of the fastener. In this embodiment, the fastener is a screw, which is threadedly connected to the first connection hole 121 or passed through the first connection hole 121 and secured by a nut. After the fastener penetrates the first connection hole 121 and the second connection hole 27 and before being tightened, the fixture base 20 moves in a first direction relative to the base 10 to adjust its position. The adjustment range is within the gap between the fastener and the second connection hole 27. In some embodiments, the fastener may also be a pin, etc.

[0064] For the specific structure of the guide structure, please refer to Figure 5 and Figure 6 The guide structure includes a guide groove 22 and two limit walls 23 formed in the limit block 21, wherein the guide groove 22 passes through the limit block 21 along the first direction, the pressure head is accommodated in the guide groove 22, and the two side walls of the guide groove 22 are respectively attached to the two side surfaces of the pressure head along the horizontal direction perpendicular to the first direction, that is, Figure 5 Two limiting walls 23 are respectively provided on both sides of the guide groove 22 close to the port of the other fixture seat 20, and the two limiting walls 23 are respectively attached to the two sides of the piezoelectric stack 101 along the horizontal direction perpendicular to the first direction, that is, Figure 5 The left and right side walls of the guide groove 22 and the two limiting walls 23 respectively limit the freedom of the pressure head and the piezoelectric stack 101 in the horizontal direction perpendicular to the first direction, thereby ensuring that the stacked piezoelectric assembly 100 can only move slightly in the first direction in the horizontal direction, ensuring the uniformity and symmetry of the pressure.

[0065] To ensure the levelness of the stacked piezoelectric assembly 100, please refer to Figure 5 and Figure 6 , first bearing steps 24 are provided on both sides of the bottom of the guide groove 22. The first bearing steps 24 extend in the same direction as the guide groove 22. The two first bearing steps 24 are used to support the pressure head, and the first top block 30 and the second top block 40 are respectively inserted into the corresponding guide groove 22. The gap between the two first bearing steps 24 can also be used to avoid the first top block 30 or the second top block 40; the inner side of the two limiting walls 23 is provided with a second bearing step 25, and the second bearing step 25 is used to support the piezoelectric stack 101. It can be seen that when processing the jig seat 20, as long as the levelness of the upper surfaces of the first bearing steps 24 and the second bearing steps 25 is ensured, the levelness of the stacked piezoelectric assembly 100 placed on the piezoelectric stack bonding tool can be ensured, thereby ensuring that when it is pressurized, it will not be affected by its own levelness deviation and affect the uniformity and symmetry of the force.

[0066] For example, please refer to Figure 5 , the limit block 21 is also provided with an overflow glue groove 26, which is arranged on the left and right sides of the guide groove 22 near the limit wall 23 and corresponds to the bonding position of the pressure head and the piezoelectric stack 101, and is used to receive glue that may overflow. Furthermore, in order to clean the glue in the overflow glue groove 26 in a timely manner, avoid residual glue on the fixture base 20, and ensure the bonding quality, in some embodiments, a flushing component can be provided on the base 10. The flushing component can use a high-pressure air gun or a high-pressure water gun. The output end of the flushing component is arranged toward the guide groove 22 and the overflow glue groove 26. It can be blown manually or automatically blown with a glue detection element (such as a visual module).

[0067] To control and visually adjust the amount of pressure applied to the stacked piezoelectric assembly 100, refer to Figure 2-Figure 4 The piezoelectric stack bonding tool also includes a pressure detection component 60 and a screw micrometer 70, wherein the pressure detection component 60 is installed between the driving end of the linear pressure module 50 and the first top block 30 through a first mounting seat 61, and is used to detect the pressure along the first direction applied to the first top block 30; the screw micrometer 70 is installed on the mounting frame 12 of the base 10 through a second mounting seat 71, and the second top block 40 is installed on the telescopic shaft of the screw micrometer 70. The telescopic shaft of the screw micrometer 70 can be telescoped along the first direction to adjust the pressure borne by the stacked piezoelectric component 100 in the first direction. During operation, the stacked piezoelectric component 100 is placed flat on two fixture seats 20, and one end pushes the second pressing portion 41 of the second top block 40 to press against the V-shaped surface of the second pressure head 103 through the screw micrometer 70. After fine-tuning to a determined position by screwing the screw micrometer 70, the linear pressure module 50 pushes the first pressing portion 31 of the first top block 30 connected to the pressure detection component 60 to press the spherical surface of the ball head of the first pressure head 102. The pressure detection component 60 is connected to a display or a host computer to read the pressure value in real time, ensuring that the same batch of products cures the adhesive under constant, identical pressure and position, and ensuring the consistency of the thickness of the adhesive film of the same batch of products.

[0068] For example, the pressure detection member 60 is a pressure sensor in the prior art, one end of which is fixed to the first mounting seat 61 by screws, and the other end is fixedly connected to the first top block 30. Figure 7 The first push block 30 includes a screw portion 32, a first push head portion 33 and a stop portion 34, wherein the screw portion 32 is threadedly connected to the detection end of the pressure detection component 60, and the stop portion 34 is provided between the screw portion 32 and the first push head portion 33. The outer diameter of the stop portion 34 is larger than the outer diameter of the screw portion 32 to limit the extreme position of the screw portion 32 screwed into the detection end of the pressure detection component 60, and the first pressing portion 31 is provided at one end of the first push head portion 33 away from the screw portion 32.

[0069] For the installation structure of the second top block 40, please refer to Figure 4 and Figure 8The second top block 40 includes a connecting shaft portion 42 and a second top head portion 43. The connecting shaft portion 42 is provided with a locking cavity. The telescopic shaft of the micrometer screw 70 extends into and is locked in the locking cavity. The second pressing portion 41 is provided at the end of the second top head portion 43 away from the connecting shaft portion 42. The connecting shaft portion 42 and the second top head portion 43 are integrally formed. In this embodiment, the connecting shaft portion 42 and the second top head portion 43 are provided as an integrated structure, which can greatly improve the rigidity, make the displacement adjustment more precise, and achieve better consistency control of the thickness of the adhesive film of the same batch of products. In this embodiment, the telescopic shaft of the micrometer screw 70 is locked with the connecting shaft portion 42 by a screw. The connecting shaft portion 42 is provided with a locking gap and a locking countersunk hole 44 for the screw to pass through. After the screw passes through the locking countersunk hole 44 and the locking gap, it is threadedly connected to the threaded hole on the other side of the locking gap, so that the connecting shaft portion 42 can clamp the telescopic shaft of the micrometer screw 70. The connection rigidity is high and the action clearance is small, which is conducive to precise adjustment. In some embodiments, the telescopic shaft of the micrometer screw 70 and the connecting shaft portion 42 may also be connected via a key.

[0070] To adjust the installation position of the micrometer screw 70, please refer to Figure 3 and Figure 4 The mounting frame 12 of the base 10 is further provided with a second mounting slot 124, into which the second mounting seat 71 is mounted. The second mounting slot 124 includes a plurality of third connection holes 123, and the second mounting seat 71 includes a plurality of fourth connection holes 711. The second mounting seat 71 is connected to the mounting frame 12 via fasteners that penetrate both the third connection holes 123 and the fourth connection holes 711. The number of third connection holes 123 is more than twice the number of fourth connection holes 711. Along the first direction, the second mounting seat 71 can select at least two mounting positions, thereby adjusting the mounting position of the micrometer screw 70. In this embodiment, the number of third connection holes 123 is three times the number of fourth connection holes 711. Along the first direction, three groups of third connection holes 123 corresponding to the fourth connection holes 711 are provided, allowing the second mounting seat 71 to be fixed in three mounting positions. In some embodiments, the fasteners may also be pins or the like.

[0071] In order to shorten the curing time of the adhesive layer and improve work efficiency, in some embodiments, an air-drying component can also be provided on the base 10. The air-drying component includes a blowing part and a cooling part. The blowing part can adopt a blowing structure such as a heat dissipation fan, and the cooling part can adopt a refrigeration cycle unit or a semiconductor refrigeration plate structure. The blowing part drives air to flow through the cooling part, reduces the temperature of the air flow, and blows it toward the stacked piezoelectric component 100 to quickly reduce the temperature of the adhesive layer.

[0072] For example, please refer to Figure 9 and Figure 10The linear pressure module 50 includes a base 51, a screw-nut assembly 52, two guide slides 53, and a slider 54. The base 51 is fixed to the base plate 11. The screw-nut assembly 52 includes a threaded transmission screw and a transmission nut. The transmission screw extends in a first direction and is rotatably mounted on the base 10. A handwheel 57 is mounted on one end of the transmission screw. The two guide slides 53 are spaced side by side and both extend in the first direction and are fixed to the base 10. The slider 54 is connected to the transmission nut and slides on the two guide slides 53. The first top block 30 is fixed to the top of the slider 54 via a first mounting seat 61. Specifically, the user can manually drive the slider 54 to slide in the first direction by turning the handwheel 57 to adjust the position of the first top block 30 and the pressure applied to the stacked piezoelectric assembly 100. In this embodiment, a trapezoidal screw is used for the transmission screw and a trapezoidal nut is used for the transmission nut to improve self-locking performance.

[0073] In order to further ensure that the position of the first top block 30 and the pressure applied to the stacked piezoelectric assembly 100 are constant, please refer to Figure 10 The slider 54 is provided with a guide hole for the guide slide bar 53 to pass through. The slider 54 is also provided with two locking parts 541 arranged at intervals. The guide hole is passed through the two locking parts 541. One of the locking parts 541 is provided with a locking hole 5411, and the other locking part 541 is provided with a mounting hole 5412. Specifically, the two locking parts 541 are arranged at intervals inside and outside, the locking hole 5411 is provided in the locking part 541 located on the inner side, and the mounting hole 5412 is provided in the locking part 541 located on the outer side. The linear pressure module 50 also includes a locking screw 55. The locking screw 55 passes through the mounting hole 5412 and is threadedly connected to the locking hole 5411. The tightening screw is connected to a locking handle 56. By screwing the locking screw 55 through the locking handle 56, the two locking parts 541 can selectively clamp the guide slide bar 53. When the slider 54 slides to the preset position, the locking handle 56 is screwed so that the two locking portions 541 clamp the slide bar together to prevent the slider 54 from sliding along the slide bar.

[0074] In order to improve work efficiency, in some embodiments, multiple pressure detection parts 60 can be arranged side by side on the first mounting seat 61, and multiple screw micrometers 70 can be arranged side by side on the second mounting seat 71. Accordingly, the number of first top blocks 30 and second top blocks 40 is also multiple, and the number of limit blocks 21 on the fixture seat 20 is also multiple, so that the piezoelectric stack bonding tool can simultaneously fix and apply pressure to multiple stacked piezoelectric components 100.

[0075] For example, please refer to Figure 11The base plate 11 is provided with a first positioning slot 111 and a second positioning slot 112. The mounting bracket 12 is secured to the first positioning slot 111 with multiple screws, while the base 51 of the linear pressure module 50 is also secured to the second positioning slot 112 with multiple screws, improving assembly efficiency. Furthermore, a clearance hole is formed between the base plate 11 and the mounting bracket 12 to allow for the linear pressure module 50 to extend and retract, further enhancing structural compactness.

[0076] Obviously, the above embodiments of the present invention are merely examples for the purpose of clearly illustrating the present invention and are not intended to limit the embodiments of the present invention. A person skilled in the art would be able to make various obvious changes, readjustments, and substitutions without departing from the scope of protection of the present invention. It is not necessary and impossible to enumerate all embodiments here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention shall be included within the scope of protection of the claims of the present invention.

Claims

1. A piezoelectric stack bonding tool for fixing a stacked piezoelectric component (100), wherein the stacked piezoelectric component (100) comprises a piezoelectric stack (101), a first pressure head (102) bonded to one end of the piezoelectric stack (101), and a second pressure head (103) bonded to the other end of the piezoelectric stack (101), characterized in that: The piezoelectric stack bonding tool comprises: Base (10); A fixture seat assembly is mounted on the base (10) and is used to carry the stacked piezoelectric assembly (100); a guide structure is provided on the fixture seat assembly, and the guide structure is used to limit the stacked piezoelectric assembly (100) to be placed along a first direction; A linear pressure module (50) is provided on one side of the fixture seat assembly and has a driving end capable of moving along the first direction. A first top block (30) is installed on the driving end of the linear pressure module (50). The first top block (30) is provided with a first pressing portion (31). The first pressing portion (31) is adapted to the outer end surface of the first pressure head (102) facing away from the piezoelectric stack (101). The linear pressure module (50) can drive the first pressing portion (31) to fit the outer end surface of the first pressure head (102) to apply pressure to the first pressure head (102) along the first direction and toward the second pressure head (103); The second top block (40) is arranged at a relative interval with the first top block (30) in the first direction, and the second top block (40) is provided with a second pressing portion (41). The second pressing portion (41) is adapted to the outer end surface of the second pressure head (103) facing away from the piezoelectric stack (101). The pressing surface of the second pressing portion (41) facing the side of the piezoelectric stack (101) can be fitted with the outer end surface of the second pressure head (103) facing the second pressing portion (41). Under the cooperation of the linear pressure module (50) and the first pressing portion (31), the second pressing portion (41) applies pressure to the second pressure head (103) along the first direction and toward the first pressure head (102).

2. The piezoelectric stack bonding tool according to claim 1, characterized in that: The piezoelectric stack bonding tool also includes: A pressure detection member (60) is provided between the driving end of the linear pressure module (50) and the first top block (30), and is used to detect the pressure applied to the first top block (30) along the first direction; A micrometer screw (70) is mounted on the base (10), and the second top block (40) is mounted on the telescopic shaft of the micrometer screw (70). The telescopic shaft of the micrometer screw (70) can be telescoped along a first direction to adjust the pressure borne by the stacked piezoelectric component (100) in the first direction.

3. The piezoelectric stack bonding tool according to claim 2, characterized in that: The second top block (40) includes a connecting shaft portion (42) and a second top head portion (43), the connecting shaft portion (42) is provided with a locking cavity, the telescopic shaft of the screw micrometer (70) extends into and is locked in the locking cavity, the second pressing portion (41) is provided at one end of the second top head portion (43) away from the connecting shaft portion (42), and the connecting shaft portion (42) and the second top head portion (43) are integrally formed.

4. The piezoelectric stack bonding tool according to claim 1, characterized in that: The first pressing portion (31) is configured as a spherical groove structure to adapt to the outer end surface of the first pressing head (102) configured as a spherical structure; and / or The second pressing portion (41) is configured as a V-shaped groove structure to adapt to the outer end surface of the second pressing head (103) configured as a V-shaped convex structure.

5. The piezoelectric stack bonding tool according to claim 1, characterized in that: The fixture seat assembly comprises two fixture seats (20) symmetrically arranged along a first direction, a limiting block (21) is provided on the fixture seat (20), and the two limiting blocks (21) respectively support and limit the first pressure head (102) and the second pressure head (103), and the guide structure comprises: A guide groove (22) passes through the limit block (21) along a first direction, the first pressing head (102) or the second pressing head (103) is accommodated in the guide groove (22), and two side walls of the guide groove (22) are respectively attached to two side surfaces of the first pressing head (102) or the second pressing head (103) along a horizontal direction perpendicular to the first direction; Two limiting walls (23) are respectively arranged on both sides of the guide groove (22) close to the port of the other fixture seat (20), and the two limiting walls (23) are respectively attached to the two side surfaces of the piezoelectric stack (101) along a horizontal direction perpendicular to the first direction.

6. The piezoelectric stack bonding tool according to claim 5, characterized in that: The first top block (30) and the second top block (40) are respectively inserted into the corresponding guide groove (22), and first bearing steps (24) are provided on both sides of the bottom of the guide groove (22), and the first bearing steps (24) are extended in the same direction as the guide groove (22). The first bearing steps (24) are used to support the first pressure head (102) or the second pressure head (103), and the gap between the two first bearing steps (24) is used to avoid the first top block (30) or the second top block (40); A second bearing step (25) is provided on the inner side of each of the two limiting walls (23), and the second bearing step (25) is used to support the piezoelectric stack (101).

7. The piezoelectric stack bonding tool according to claim 5, characterized in that: The base (10) is provided with a plurality of first connection holes (121), the fixture seat (20) is provided with a plurality of second connection holes (27), and the fixture seat (20) and the base (10) are connected via fasteners that are simultaneously provided through the first connection holes (121) and the second connection holes (27); The diameter of the second connecting hole (27) is larger than the diameter of the first connecting hole (121) and the outer diameter of the fastener.

8. The piezoelectric stack bonding tool according to any one of claims 1 to 7, characterized in that: The linear pressure module (50) comprises: A screw-nut assembly (52) comprises a transmission screw and a transmission nut in threaded engagement, wherein the transmission screw extends in a first direction and is rotatably disposed on the base (10), and a handwheel (57) is mounted on one end of the transmission screw; a guide slide bar (53), the guide slide bar (53) extending along a first direction and fixed to the base (10); A slider (54) is connected to the transmission nut and is slidably mounted on the guide slide bar (53); the first top block (30) is fixed to the slider (54) via a first mounting seat (61).

9. The piezoelectric stack bonding tool according to claim 8, characterized in that: The slider (54) is provided with a guide hole for the guide slide (53) to pass through, and the slider (54) is also provided with two locking parts (541), and the guide hole is passed through the two locking parts (541), one of the locking parts (541) is provided with a locking hole (5411), and the other locking part (541) is provided with a mounting hole (5412), and the linear pressure module (50) also includes a locking screw (55), the locking screw (55) is passed through the mounting hole (5412) and is threadedly connected to the locking hole (5411), and the two locking parts (541) are selectively clamped to the guide slide (53) by screwing the locking screw (55).

10. The piezoelectric stack bonding tool according to any one of claims 1 to 7, characterized in that: The base (10) includes a bottom plate (11) and a mounting frame (12), the bottom plate (11) is provided with a first positioning groove (111) and a second positioning groove (112), the mounting frame (12) is locked in the first positioning groove (111), the linear pressure module (50) is locked in the second positioning groove (112), and an avoidance hole for avoiding the telescopic action of the linear pressure module (50) is formed between the bottom plate (11) and the mounting frame (12), and the fixture seat assembly and the second top block (40) are both arranged on the mounting frame (12).

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