Piezoelectric injection body and piezoelectric injection device

Abstract

The invention discloses a piezoelectric injection main body and a piezoelectric injection device, and relates to the technical field of dispensing valves, the piezoelectric injection main body comprises a shell and a driving module, and the shell is provided with a mounting space; the driving module comprises a mounting shell, two piezoelectric ceramic assemblies, two adjusting assemblies and a lever assembly, a containing cavity is formed in the mounting shell, each piezoelectric ceramic assembly comprises a piezoelectric ceramic body, an upper hinge and a lower hinge, the upper hinge and the lower hinge are connected to the upper end and the lower end of the piezoelectric ceramic body respectively, the lever assembly comprises a rotating shaft and a lever, and the rotating shaft is connected to the mounting shell; the lever is rotationally connected with the rotating shaft, the lower hinges of the two piezoelectric ceramic assemblies are connected to the lever respectively and located on the two opposite sides of the rotating shaft, and each adjusting assembly is connected to the corresponding upper hinge so as to adjust the pre-tightening force of the piezoelectric ceramic body; the driving module is integrally and detachably connected to the mounting space.

Description

Technical Field

[0001] This invention relates to the field of dispensing valve technology, and in particular to a piezoelectric jetting body and a piezoelectric jetting device. Background Technology

[0002] Piezoelectric jet dispensing valves are widely used in electronic packaging, precision dispensing, and other scenarios requiring high-precision fluid jetting. Piezoelectric jet dispensing enables non-contact adhesive spraying, offering high efficiency and precision while maintaining non-contact operation. However, despite these advantages, piezoelectric jet dispensing still has some limitations in its application.

[0003] Existing piezoelectric jetting devices use the outer shell of the jetting device body as the mounting housing, with the drive components integrated inside the mounting housing. The entire piezoelectric jetting body is a one-piece design that cannot be separated, which is not conducive to subsequent disassembly and maintenance. Summary of the Invention

[0004] The main objective of this invention is to provide a piezoelectric jetting body and a piezoelectric jetting device, which aims to improve the ease of assembly and disassembly of the piezoelectric jetting body.

[0005] To achieve the above objectives, the piezoelectric jetting body proposed in this invention comprises: A housing having an installation space; The drive module includes a mounting shell, two sets of piezoelectric ceramic assemblies, two sets of adjustment assemblies, and a lever assembly. The mounting shell has a cavity. Each piezoelectric ceramic assembly includes a piezoelectric ceramic body and upper and lower hinges respectively connected to the upper and lower ends of the piezoelectric ceramic body. The lever assembly includes a rotating shaft and a lever. The rotating shaft is connected to the mounting shell, and the lever is rotatably connected to the rotating shaft. The lower hinges of the two piezoelectric ceramic assemblies are respectively connected to the levers and located on opposite sides of the rotating shaft. Each adjustment assembly is connected to the upper hinge to adjust the preload of the piezoelectric ceramic body. The drive module is integrally and detachably connected to the mounting space.

[0006] In one embodiment, the sidewall of the housing is formed with an installation channel, and the drive module is connected to the installation space along the installation channel.

[0007] In one embodiment, each set of the adjustment components includes a torque screw, a concave block, and a ceramic ball. The two opposite ends of the concave block are respectively connected to the ceramic ball and the torque screw, and the side of the ceramic ball away from the concave block abuts against the upper hinge.

[0008] In one embodiment, the piezoelectric jetting body further includes a first temperature sensor, a control board, a drive cable, and a signal line. The first temperature sensor is connected to the side wall of the piezoelectric ceramic body. Both the piezoelectric ceramic body and the first temperature sensor are electrically connected to the control board. The drive cable and the signal line are electrically connected to the control board and are used to connect the control board to an external controller.

[0009] In one embodiment, an air inlet and an air outlet are formed at the top of the housing. The air inlet and the air outlet are both connected to the cavity. An air inlet nozzle is connected to the position of the air inlet, and an air outlet nozzle is connected to the position of the air outlet. The air inlet nozzle and the air outlet nozzle are used to connect to an air pipe.

[0010] In one embodiment, the piezoelectric jet body further includes an adjustment module, which includes an adjustment seat, an adjustment rod, and a limiting pin. The adjustment seat is connected to the bottom end of the housing for connecting a fluid assembly. The adjustment rod extends into the housing and connects to the adjustment seat. Openings are formed on opposite sides of the sidewall of the adjustment seat. Two limiting pins are included, which are engaged in the housing and located in the openings on both sides of the adjustment seat. The limiting pins can abut against the top wall of the opening to limit the downward stroke of the adjustment seat. The end of the lever away from the piezoelectric ceramic assembly extends into the opening for connecting the fluid assembly.

[0011] In one embodiment, the piezoelectric jet body further includes a fluid mounting assembly, which includes a rotating shaft, a fastening ball, a preload spring, and a wrench. The outer peripheral wall of the rotating shaft extends to form a mounting groove with a gradually shallowing / deepening depth. The adjusting seat and the housing enclose a rotating shaft mounting cavity. One axial end of the rotating shaft is located in the rotating shaft mounting cavity, and the other end extends out of the rotating shaft mounting cavity and is connected to the wrench. The adjusting seat also forms a through cavity extending vertically. A connecting channel is formed between the through cavity and the rotating shaft mounting cavity. The fastening ball is located in the connecting channel and one end abuts against the mounting groove. The wrench can drive the rotating shaft to rotate so that the end of the fastening ball facing away from the rotating shaft is exposed in the through cavity. The preload spring is sleeved on the rotating shaft, and the two axial ends of the preload spring abut against the bottom wall of the housing and the rotating shaft, respectively.

[0012] The present invention also proposes a piezoelectric jetting device, which includes the piezoelectric jetting body described above, and... A fluid assembly includes a mounting base and a firing pin assembly. The mounting base has a mounting cavity, and a nozzle is connected to the bottom end of the mounting cavity. The firing pin assembly includes a firing pin and a firing pin spring. The firing pin is disposed in the mounting cavity, and the firing pin spring is sleeved on the firing pin. The mounting base and the firing pin enclose a dispensing cavity. The firing pin can move up and down along the mounting base to squeeze the dispensing material in the dispensing cavity to the nozzle for ejection.

[0013] In one embodiment, the fluid assembly further includes a glue inlet nozzle, a glue inlet nozzle base, and a flow channel. The glue inlet nozzle is connected to the glue inlet nozzle base, and the two ends of the flow channel in the length direction are respectively connected to the glue inlet nozzle base and the mounting base. The glue inlet nozzle, the glue inlet nozzle base, the flow channel, and the mounting base are sequentially connected and form a glue channel inside.

[0014] In one embodiment, the piezoelectric jetting device further includes a syringe assembly and a nozzle heating assembly; the syringe assembly includes a syringe and a syringe heating structure, the syringe has a cavity formed inside to accommodate the colloid, the bottom end of the syringe is connected to the colloid inlet, and the syringe heating structure is connected to the outer peripheral wall of the syringe to heat the syringe; The nozzle heating assembly includes a flow channel mounting base and a heating structure. The flow channel mounting base has a mounting surface, the flow channel is mounted on the mounting surface, and the heating structure is connected to the flow channel mounting base to heat the flow channel.

[0015] This invention proposes a piezoelectric jetting body, belonging to the field of fluid jetting equipment, suitable for scenarios requiring high-precision fluid jetting such as electronic packaging and precision dispensing. It achieves precise fluid jetting control through the driving of piezoelectric ceramics. The piezoelectric jetting body mainly consists of a shell and a drive module. The shell can be made of aluminum alloy, possessing good structural strength and heat dissipation performance. Its hollow interior forms an installation space, the size of which is adapted to the shape of the drive module, ensuring stable installation. The drive module includes a mounting shell, two sets of piezoelectric ceramic components, two sets of adjustment components, and a lever assembly. The mounting shell is a rectangular shell made of stainless steel, with an internal cavity to accommodate each component. The piezoelectric ceramic body in each set of piezoelectric ceramic components is composed of stacked elongated piezoelectric ceramic sheets, possessing high piezoelectric conversion efficiency. The upper and lower hinges are made of hard alloy and are respectively bonded to the upper and lower ends of the piezoelectric ceramic body. The lever assembly's pivot is a metal cylinder, fixedly connected to the inner wall of the mounting housing. The lever itself is a long metal strip with an arc-shaped groove at its bottom. This groove allows the lever to engage with the pivot, enabling rotational connection between the lever and the pivot. This allows the lever to rotate freely around the pivot while ensuring the stability of the connection. The lower hinges of the two sets of piezoelectric ceramic components are fixed to the lever by abutment and are located on opposite sides of the pivot. Specifically, the lever has arc-shaped protrusions on its left and right sides relative to the pivot. The two lower hinges form arc-shaped grooves corresponding to these protrusions, with each protrusion engaging with a corresponding groove to ensure a stable fit between the piezoelectric ceramic component and the lever, thus ensuring the stability of force transmission between them. The lower end of the piezoelectric ceramic component on the left side of the lever connects to the lever, controlling the left end of the lever to press down. The lower end of the piezoelectric ceramic component on the right side connects to the lever, controlling the left end of the lever to lift up. Each adjustment assembly is connected to the upper hinge, allowing adjustment of the preload of the piezoelectric ceramic body to ensure optimal operation. By employing a dual piezoelectric ceramic drive module design, the vibration and rebound time of the valve stem during dispensing are reduced, increasing the operating frequency of the piezoelectric jet dispensing valve. Simultaneously, the generation of satellite dots during dispensing is reduced, contributing to improved dispensing consistency. Furthermore, the drive module is detachably connected to the housing's mounting space via bolts and other fasteners, facilitating future maintenance and component replacement, thus enhancing the ease of disassembly and maintenance of the piezoelectric jetting device. The extension and retraction of the piezoelectric ceramic components drive the lever to rotate around the shaft, transmitting power to drive the impact pin in the fluid component of the piezoelectric jetting device, assisting in the dispensing operation. The adjusting component ensures the stability of the piezoelectric ceramic operation. This structural design enables the piezoelectric jetting body to provide high-precision driving force, meeting the requirements of precision jetting. Attached Figure Description

[0016] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without creative effort.

[0017] Figure 1 This is a schematic diagram of an embodiment of the piezoelectric jetting device provided by the present invention; Figure 2 for Figure 1 A cross-sectional structural diagram of the medium-pressure electro-jet main body; Figure 3 for Figure 2 A schematic diagram of the structure of the driver module; Figure 4 for Figure 3 A cross-sectional view of the drive module. Figure 5 for Figure 1 A schematic diagram of the internal structure of a medium-pressure electro-injection device; Figure 6 for Figure 2 Schematic diagram of the structure of the fluid mounting assembly; Figure 7 for Figure 6 Schematic diagram of the structure of the rotating shaft; Figure 8 A schematic diagram of the structure of an embodiment of the fluid component provided by the present invention; Figure 9 for Figure 8 A cross-sectional view of the fluid assembly. Figure 10 for Figure 8 Exploded structural diagram of a fluid-bearing component; Figure 11 This is a schematic diagram of a structure of an embodiment of the nozzle heating assembly provided by the present invention; Figure 12 This is a schematic diagram of the assembly of the piezoelectric jet body and the fluid component in this invention; Figure 13 for Figure 12 A cross-sectional view of the medium-pressure electro-jet main body and fluid components after assembly; Figure 14 This is a schematic diagram of the assembly of the fluid component and the syringe component in this invention; Figure 15 This is a schematic diagram of the assembly of the fluid component and the nozzle heating component in this invention.

[0018] Explanation of icon numbers: 100. Piezoelectric jetting device; 10. Piezoelectric jetting body; 1. Housing; 1a. Mounting channel; 11. Air inlet; 12. Air outlet; 2. Drive module; 21. Mounting shell; 22. Piezoelectric ceramic assembly; 221. Upper hinge; 222. Piezoelectric ceramic body; 223. Lower hinge; 23. Adjustment assembly; 231. Torque screw; 232. Concave block; 233. Ceramic ball; 24. Lever assembly; 241. Lever; 242. Rotating shaft; 31. First temperature sensor; 32. Control board; 33. Drive cable; 34. Signal line; 4. Adjustment module; 41. Adjustment seat; 42. Adjustment rod; 43. Limit pin; 44. Nut; 45. Threaded post; 5. Fluid mounting assembly; 51. Rotating shaft; 51a. Mounting groove ; 52. Fastening ball; 53. Preload spring; 54. Wrench; 20. Fluid assembly; 201. Mounting base; 201a. Recess; 201b. Second lug; 202. Nozzle; 203. Strike pin assembly; 2031. Strike pin; 2032. Strike pin spring; 204. Guide sleeve; 204a. Clear groove; 205. Plug; 206. Nut; 207. Inlet nozzle; 208. Inlet nozzle base; 209. Flow channel; 210. Plug; 30. Syringe assembly; 40. Nozzle heating assembly; 401. Heating block; 401a. Fastening screw; 402. Insulation block; 403. Mounting block; 404. Bellows; 405. Connector mounting base; 406. Cable connector; 407. Heating rod; 408. Second temperature sensor.

[0019] The realization of the objective, functional features and advantages of the present invention will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation

[0020] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present invention.

[0021] It should be noted that if the embodiments of the present invention involve directional indicators (such as up, down, left, right, front, back, etc.), the directional indicators are only used to explain the relative positional relationship and movement of the components in a specific posture. If the specific posture changes, the directional indicators will also change accordingly.

[0022] Furthermore, if the embodiments of this invention involve descriptions such as "first" or "second," these descriptions are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined with "first" or "second" may explicitly or implicitly include at least one of those features. Additionally, the use of "and / or" or "and / or" throughout the text includes three parallel solutions. For example, "A and / or B" includes solution A, solution B, or a solution where both A and B are satisfied simultaneously. Furthermore, the technical solutions of the various embodiments can be combined with each other, but this must be based on the ability of those skilled in the art to implement them. When the combination of technical solutions is contradictory or impossible to implement, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection claimed by this invention.

[0023] Piezoelectric jet dispensing valves are widely used in electronic packaging, precision dispensing, and other scenarios requiring high-precision fluid jetting. Piezoelectric jet dispensing enables non-contact adhesive spraying, offering high efficiency and precision while maintaining non-contact operation. However, despite these advantages, piezoelectric jet dispensing still has some limitations in its application.

[0024] Existing piezoelectric jetting devices use the outer shell of the jetting device body as the mounting housing, with the drive components integrated inside the mounting housing. The entire piezoelectric jetting body is a one-piece design that cannot be separated, which is not conducive to subsequent disassembly and maintenance.

[0025] To solve the above problems, please refer to... Figures 1 to 3 This invention proposes a piezoelectric jetting body 10, including a housing 1 and a drive module 2. The housing 1 forms an installation space. The drive module 2 includes a mounting shell 21, two sets of piezoelectric ceramic components 22, two sets of adjustment components 23, and a lever assembly 24. The mounting shell 21 has a cavity. Each piezoelectric ceramic component 22 includes a piezoelectric ceramic body 222 and an upper hinge 221 and a lower hinge 223 respectively connected to the upper and lower ends of the piezoelectric ceramic body 222. The lever assembly 24 includes a rotating shaft 242 and a lever 241. The rotating shaft 242 is connected to the mounting shell 21, and the lever 241 is rotatably connected to the rotating shaft 242. The lower hinges 223 of the two piezoelectric ceramic components 22 are respectively connected to the lever 241 and located on opposite sides of the rotating shaft 242. Each adjustment component 23 is respectively connected to the upper hinge 221 to adjust the preload of the piezoelectric ceramic body 222. The drive module 2 is integrally and detachably connected to the installation space.

[0026] This invention proposes a piezoelectric jetting body 10, belonging to the field of fluid jetting equipment, suitable for scenarios requiring high-precision fluid jetting such as electronic packaging and precision dispensing. It achieves precise fluid jetting control through the driving of piezoelectric ceramics. The piezoelectric jetting body 10 mainly consists of a shell 1 and a driving module 2. The shell 1 can be made of aluminum alloy, possessing good structural strength and heat dissipation performance. Its hollow interior forms an installation space, the size of which is adapted to the shape of the driving module 2, ensuring stable installation. The driving module 2 includes a mounting shell 21, two sets of piezoelectric ceramic components 22, two sets of adjustment components 23, and a lever component 24. The mounting shell 21 is a rectangular shell 1 made of stainless steel, with an internal cavity to accommodate the components. The piezoelectric ceramic body 222 in each set of piezoelectric ceramic components 22 is composed of stacked elongated piezoelectric ceramic sheets, possessing high piezoelectric conversion efficiency. The upper hinge 221 and lower hinge 223 are made of hard alloy and are respectively bonded to the upper and lower ends of the piezoelectric ceramic body 222. The pivot 242 of the lever assembly 24 is a metal cylinder, fixedly connected to the inner wall of the mounting housing 21. The lever 241 is a long metal strip, with an arc-shaped groove at its bottom end. This groove allows the lever 241 to be engaged above the pivot 242, enabling a rotatable connection between the lever 241 and the pivot 242. This allows the lever 241 to rotate flexibly around the pivot 242 and ensures the stability of the connection. The lower hinges 223 of the two sets of piezoelectric ceramic assemblies 22 are respectively fixed to the lever 241 by abutment and are located on opposite sides of the pivot 242. Specifically, the lever 241 has arc-shaped protrusions on its left and right sides relative to the pivot 242. The two lower hinges 223 have arc-shaped grooves corresponding to these protrusions, with one arc-shaped protrusion engaging with one arc-shaped groove. This ensures a stable connection between the piezoelectric ceramic assembly 22 and the lever 241, thereby ensuring the stability of the force transmission between them. The lower end of the piezoelectric ceramic component 22 on the left side of lever 241 is connected to lever 241, controlling the left end of lever 241 to press down. The lower end of the piezoelectric ceramic component 22 on the right side is connected to lever 241, controlling the left end of lever 241 to lift up. Each set of adjustment components 23 is connected to the upper hinge 221, which can adjust the preload of the piezoelectric ceramic body 222 to ensure that it works in the optimal state. By adopting the design of dual piezoelectric ceramic drive modules, the vibration and rebound time of the valve stem during dispensing are reduced, the working frequency of the piezoelectric jet dispensing valve is increased, and the generation of satellite points during dispensing is reduced, which helps to improve the consistency of dispensing. In addition, the drive module 2 is detachably connected to the installation space of the housing 1 by bolts and other fasteners, which facilitates later maintenance and replacement of parts and improves the convenience of disassembly and maintenance of the piezoelectric jetting device 100.The extension and retraction of the piezoelectric ceramic component 22 drives the lever 241 to rotate around the shaft 242, thereby transmitting power and driving the impact pin 2031 in the fluid component 20 of the piezoelectric jetting device 100 to assist in completing the jetting and dispensing operation. The adjustment component 23 ensures the stability of the piezoelectric ceramic operation. This structural design enables the piezoelectric jetting body 10 to provide high-precision driving force to meet the requirements of precision jetting.

[0027] Further, please refer to Figure 1 and Figure 2 In one embodiment, the sidewall of the housing 1 is formed with an installation channel 1a, and the drive module 2 is connected to the installation space along the installation channel 1a.

[0028] A horizontally extending mounting channel 1a is formed along one side wall of the housing 1. The cross-sectional shape of the mounting channel 1a is the same as that of the drive module 2, being a rectangular structure, but slightly larger than the drive module 2, allowing the drive module 2 to slide smoothly into the mounting space along the mounting channel 1a. When installing the drive module 2, it is pushed into the mounting space along the mounting channel 1a, and then secured to the housing 1 with bolts. For disassembly, the bolts are loosened to pull the drive module 2 out along the mounting channel 1a. This installation method eliminates the need for operation from the top or bottom of the housing 1, simplifying the installation and disassembly process of the drive module 2, improving maintenance efficiency, and ensuring the accuracy of the drive module 2 installation by providing a guide structure, thus guaranteeing its fit with other components within the housing 1.

[0029] In one embodiment, please refer to Figure 2 , Figure 4 as well as Figure 5 Each set of adjustment components 23 includes a torque screw 231, a concave block 232 and a ceramic ball 233. The two opposite ends of the concave block 232 are respectively connected to the ceramic ball 233 and the torque screw 231. The side of the ceramic ball 233 away from the concave block 232 abuts against the upper hinge 221.

[0030] Each set of adjustment components 23 includes a torque screw 231, a concave block 232, and a ceramic ball 233. The torque screw 231 is a cylindrical head screw with an internal hexagonal hole, and its lower end abuts against the concave block 232, forming an integral part with the concave block 232. The concave block 232 is a metal block, with its upper end face contacting the torque screw 231 and its lower end face machined with a concave spherical surface. The ceramic ball 233 is made of high-precision wear-resistant ceramic and is placed inside the concave spherical surface of the concave block 232, allowing it to rotate flexibly within the concave spherical surface. The side of the ceramic ball 233 facing away from the concave block 232 abuts against the upper end face of the upper hinge 221. The torque screw 231 and the mounting shell 21 can be connected by threads. After the torque screw 231 rotates, the concave block 232 presses down, transmitting the preload through the ceramic ball 233, the piezoelectric ceramic component 22, and the lever 241 to the piezoelectric ceramic bodies 222 on both sides. The piezoelectric ceramic bodies 222 on both sides compress and store energy. When the torque screw 231 is turned to the appropriate position, it can be glued to further fix the torque screw 231 and the drive housing 1, making the displacement generated by the piezoelectric ceramic component 22 under the action of the electric field more reliable. The force and displacement of the piezoelectric ceramic component 22 are transmitted to the end striker 2031 more accurately. The ceramic ball 233 makes the concave block 232 and the upper hinge 221 point contact, reducing friction and making the adjustment of the preload more precise. At the same time, the ceramic ball 233 has good wear resistance, ensuring that the adjustment component 23 can maintain stable performance after long-term use. The torque screw 231 provides a convenient adjustment method, allowing operators to accurately adjust the preload according to actual needs.

[0031] In one embodiment, please refer to Figure 2 , Figure 3 as well as Figure 5 The piezoelectric jet body 10 also includes a first temperature sensor 31, a control board 32, a drive cable 33, and a signal line 34. The first temperature sensor 31 is connected to the side wall of the piezoelectric ceramic body 222. Both the piezoelectric ceramic body 222 and the first temperature sensor 31 are electrically connected to the control board 32. The drive cable 33 and the signal line 34 are electrically connected to the control board 32 and are used to connect the control board 32 to an external controller.

[0032] The piezoelectric jetting body 10 also includes a first temperature sensor 31, a control board 32, a drive cable 33, and a signal line 34. In this embodiment, the first temperature sensor 31 is a PT100 sensor, which is attached to the side wall of the piezoelectric ceramic body 222 with thermally conductive adhesive, and can detect the temperature of the piezoelectric ceramic body 222 in real time. The control board 32 is a circuit board integrating a microprocessor and a drive circuit, which is fixedly installed in the mounting space of the housing 1. The piezoelectric ceramic body 222 is connected to the drive circuit of the control board 32 through wires, and the first temperature sensor 31 is connected to the microprocessor of the control board 32 through the signal line 34. One end of the drive cable 33 and the signal line 34 are electrically connected to the control board 32, and the other end extends out of the housing 1 for connecting to an external controller. The control board 32 is spaced apart from the piezoelectric ceramic body 222 to avoid electromagnetic interference. Simultaneously, it detects changes in the drive current, voltage, and impedance of the piezoelectric ceramic body 222 and transmits this information to an external controller. Combined with algorithms, the aging degree of the piezoelectric ceramic body 222 is calculated, thereby assessing its remaining lifespan. A first temperature sensor 31 is attached to the sidewall of the piezoelectric ceramic body 222 to collect its temperature in real time, preventing depolarization failure due to overheating. Through the coordinated operation of the control board 32 and the first temperature sensor 31, timely warnings can be issued when ceramic performance deteriorates or temperatures become abnormal, reminding users to perform maintenance or replacement, avoiding production losses due to sudden downtime. The drive cable 33 provides the drive current to the piezoelectric ceramic body 222, while the signal line 34 enables command and data transmission between the control board 32 and the external controller. This structure endows the piezoelectric jet body 10 with temperature protection and remote control functions, improving the safety and intelligence of the equipment.

[0033] In one embodiment, please refer to Figure 1 The top of the housing 1 has an air inlet and an air outlet, both of which are connected to the cavity. An air inlet nozzle 11 is connected to the air inlet, and an air outlet nozzle 12 is connected to the air outlet. The air inlet nozzle 11 and the air outlet nozzle 12 are used to connect to the air pipe.

[0034] An air inlet and an air outlet are formed through the top surface of the housing 1, both of which communicate with the cavity inside the mounting housing 21. An air inlet nozzle 11 is threadedly connected to the air inlet, and an air outlet nozzle 12 is threadedly connected to the air outlet. Both nozzles 11 and 12 are made of brass, and one end has a standard air pipe interface for connecting to an external air pipe. During operation, an external air source introduces dry compressed air into the cavity through the air inlet nozzle 11 and the air inlet to cool and protect the piezoelectric ceramic component 22 and other components inside the cavity from dust. The air is then discharged through the air outlet and the air outlet nozzle 12. This air path design effectively removes the heat generated during piezoelectric ceramic operation, lowers the temperature inside the cavity, ensures the normal operation of the piezoelectric ceramic component 22, and prevents external dust from entering the cavity and affecting the normal operation of the components, ensuring the long-term stable operation of the drive module 2.

[0035] In one embodiment, please refer to Figure 2 and Figure 5 The piezoelectric jet body 10 also includes an adjustment module 4, which includes an adjustment seat 41, an adjustment rod 42, and a limiting pin 43. The adjustment seat 41 is connected to the bottom end of the housing 1 to connect the fluid assembly 20. The adjustment rod 42 extends into the housing 1 and is connected to the adjustment seat 41. Openings are formed on both sides of the side wall of the adjustment seat 41. There are two limiting pins 43. The two limiting pins 43 are locked in the housing 1 and are located in the openings on both sides of the adjustment seat 41. The limiting pins 43 can abut against the top wall of the opening to limit the downward stroke of the adjustment seat 41. The end of the lever 241 away from the piezoelectric ceramic assembly 22 extends into the opening to connect the fluid assembly 20.

[0036] Specifically, to facilitate the lifting and lowering adjustment of the adjusting seat 41 within the housing 1, the adjusting module 4 also includes a nut 44 and a threaded post 45. The outer peripheral wall of the adjusting rod 42 forms a limiting step. The threaded post 45 is sleeved on the adjusting rod 42 and its top surface abuts against the limiting step. The nut 44 is screwed to the adjusting post, and the top of the nut 44 abuts against the bottom wall of the threaded post 45. The threaded post 45 has an external thread, and the top of the adjusting seat 41 has an internal thread that matches the external thread. The adjusting rod 42 rotates relative to the housing 11 to drive the adjusting seat 41 to move up and down within the installation space.

[0037] One end of the adjusting rod 42 extends into the housing 1 and connects to the threaded post 45 and the nut 44, while the other end protrudes outside the housing 1 and connects to a knob or handle for easy rotation by the operator. The connection between the adjusting post and the outside of the housing 1 is sealed with a gasket and a sealing ring to prevent external dust or moisture from entering the housing 1 through the connection gap. The limiting step on the outer peripheral wall of the adjusting rod 42 abuts against the top surface of the threaded post 45, locking the axial position of the threaded post 45. The nut 44 is screwed to the adjusting post and its top abuts against the bottom wall of the threaded post 45, thus fixing the threaded post 45 on the adjusting rod 42. The limiting step on the adjusting post and the nut 44 restrict the stroke of the threaded post 45 from both ends, preventing the threaded post 45 from axially moving during rotation with the adjusting rod 42. The external thread of the threaded column 45 engages with the internal thread at the top of the adjusting seat 41, converting the rotational motion of the adjusting rod 42 into the linear lifting and lowering of the adjusting seat 41; thereby realizing the lifting and lowering adjustment of the installation position of the adjusting seat 41 in the housing 1, and realizing the adjustment of the relative position of the impact pin 2031 and the nozzle 202 in the piezoelectric injection device 100.

[0038] The limiting pins 43 are two cylindrical metal pins, horizontally engaged in the pin holes of the housing 1, and located in the openings on both sides of the adjusting seat 41. When the adjusting seat 41 descends, the limiting pins 43 abut against the top wall of the opening, thereby limiting the maximum stroke of the adjusting seat 41. The end of the lever 241 away from the piezoelectric ceramic component 22 bends downward and extends into the opening for connection with the fluid component 20 to transmit driving force. The setting of the adjusting module 4 can adjust the connection position between the lever 241 and the fluid component 20 to ensure effective transmission of driving force, while the limiting pins 43 prevent the adjusting seat 41 from descending excessively, causing parts to fall out of the housing 1 and be damaged, thus improving the safety of the equipment.

[0039] In one embodiment, please refer to Figure 2 , Figure 6 as well as Figure 7 The piezoelectric jet body 10 also includes a fluid mounting assembly 5, which includes a rotating shaft 51, a fastening ball 52, a preload spring 53, and a wrench 54. The outer peripheral wall of the rotating shaft 51 extends to form a mounting groove 51a with a gradually shallowing / deepening depth. The adjusting seat 41 and the housing 1 enclose a rotating shaft 242 mounting cavity. One axial end of the rotating shaft 51 is located in the rotating shaft 242 mounting cavity, and the other end extends out of the rotating shaft 242 mounting cavity and is connected to the wrench 54. The adjusting seat 41 also forms a through cavity that runs vertically through the shaft. A connecting channel is formed between the through cavity and the rotating shaft 242 mounting cavity. The fastening ball 52 is located in the connecting channel and one end abuts against the mounting groove 51a. The wrench 54 can drive the rotating shaft 51 to rotate so that the end of the fastening ball 52 facing away from the rotating shaft 51 is exposed in the through cavity. The preload spring 53 is sleeved on the rotating shaft 51, and the two axial ends of the preload spring 53 abut against the bottom wall of the housing 1 and the rotating shaft 51, respectively.

[0040] A mounting groove 51a with a gradually changing depth is formed on the outer peripheral wall of the rotating shaft 51. When the operator turns the wrench 54 to drive the rotating shaft 51 to rotate, the groove depth of the mating part between the rotating shaft 51 and the fastening ball 52 gradually changes, thereby causing the rotating shaft 51 to push the fastening ball 52 to move axially along the connecting channel. One end of the fastening ball 52 abuts against the mounting groove 51a, and the other end extends into the through cavity when the rotating shaft 51 rotates to a specific angle, to abut against and lock the mounting seat 201 of the fluid assembly 20. A preload spring 53 is sleeved on the rotating shaft 51, and an annular groove is formed on the side of the rotating shaft 51 facing the preload spring 53. The end of the preload spring 53 is engaged in the annular groove. The inner sidewall of the annular groove can limit the radial displacement of the preload spring 53, thereby ensuring the stability of the connection between the preload spring 53 and the rotating shaft 51 and reducing the radial offset generated by the preload spring 53 during compression and reset. By setting the preload spring 53, it is possible to facilitate the flexible rotation of the rotating shaft 51 relative to the housing 1. On the other hand, the reaction force exerted by the preload spring 53 on the rotating shaft 51 ensures a stable and reliable fit between the rotating shaft 51 and the fastening ball 52, thereby guaranteeing the reliability and stability of the fluid mounting assembly 5. This structure allows operators to install and remove the fluid assembly 20 in seconds without tools, greatly reducing maintenance time.

[0041] This invention also proposes a piezoelectric jetting device 100, which includes a piezoelectric jetting body 10 and a fluid assembly 20. The fluid assembly 20 includes a mounting base 201 and a striker assembly 203. A mounting cavity is formed within the mounting base 201, and a nozzle 202 is connected to the bottom end of the mounting cavity. The striker assembly 203 includes a striker 2031 and a striker spring 2032. The striker 2031 is disposed within the mounting cavity, and the striker spring 2032 is sleeved on the striker 2031. The mounting base 201 and the striker 2031 enclose a dispensing cavity. The striker 2031 can move up and down along the mounting base 201 to squeeze the dispensing material in the dispensing cavity to the nozzle 202 for ejection. The specific structure of this piezoelectric jetting device 100 is as described in the above embodiments. Since this piezoelectric jetting device 100 adopts all the technical solutions of all the above embodiments, it possesses at least all the beneficial effects brought about by the technical solutions of the above embodiments, which will not be elaborated further here. Please refer to... Figures 8 to 10The mounting base 201 has an internal mounting cavity that provides mounting space for the impact pin assembly 203. The bottom end of the mounting cavity is directly connected to the nozzle 202, ensuring that the colloid can flow smoothly to the nozzle 202 under the action of the impact pin assembly 203. The impact pin assembly 203 consists of an impact pin 2031 and an impact pin spring 2032. The impact pin 2031 is located in the mounting cavity, and its top end cooperates with the impact pin spring 2032. The impact pin spring 2032 is sleeved on the outer periphery of the impact pin 2031. When the impact pin 2031 moves downward, it can compress the impact pin spring 2032 to accumulate elastic potential energy. The elastic potential energy of the impact pin spring 2032 enables the impact pin 2031 to move and reset in the mounting cavity when the downward pressure is lost. The mounting base 201 and the impact pin 2031 enclose a glue injection cavity as a temporary storage area for the colloid. When the impact pin 2031 descends, it squeezes the colloid in the cavity and sprays it out precisely in the form of microdroplets through the nozzle 202. The mechanical linkage between the impact pin 2031 and the impact pin spring 2032 enables quantitative delivery of colloid. The design of direct connection between the nozzle 202 and the mounting cavity shortens the colloid delivery path, reduces the risk of colloid residue and curing during delivery, and achieves high-precision, high-frequency micro-droplet spraying, which is especially suitable for micro-droplet spraying scenarios of high viscosity or fast-curing colloids.

[0042] In one embodiment, please refer to Figures 8 to 10 To ensure the reliability of the lifting and moving of the impact pin 2031, the fluid assembly 20 also includes a guide sleeve 204. The guide sleeve 204 is sleeved on the impact pin 2031 and extends along the axial direction of the impact pin 2031. The top wall of the guide sleeve 204 abuts against the bottom end of the impact pin spring 2032, and the outer peripheral wall of the guide sleeve 204 is engaged in the mounting cavity.

[0043] The guide sleeve 204 is a hollow sleeve made of annular metal or engineering plastic, fitted around the outer periphery of the firing pin 2031 and extending axially along the firing pin 2031. Its top wall abuts against the bottom end of the firing pin spring 2032, and its outer peripheral wall is secured within the mounting cavity. The guide sleeve 204 achieves coaxiality control of the firing pin 2031's movement, preventing the firing pin 2031 from swaying due to lateral forces during lifting and lowering. The fit design between the guide sleeve 204 and the firing pin 2031 ensures smooth sliding of the firing pin 2031 while preventing leakage of colloid from the gaps. This structure restricts the reciprocating motion of the firing pin 2031 to a single axial degree of freedom, significantly reducing the probability of nozzle 202 clogging caused by the tilting of the firing pin 2031. At the same time, the firing pin spring 2032 transmits pressure through the guide sleeve 204, ensuring uniform force on the firing pin 2031, extending the fatigue life of the firing pin spring 2032, and facilitating smooth movement of the firing pin 2031 within the mounting cavity.

[0044] In one embodiment, to further improve the sealing effect within the mounting cavity, please refer to... Figure 9 and Figure 10The fluid assembly 20 also includes a plug 205. A step is formed in the mounting base 201. The plug 205 is sleeved on the striker 2031 and locked in the step. The guide sleeve 204 abuts against the plug 205 on the side opposite to the striker spring 2032.

[0045] The inner wall of the mounting cavity is machined with stepped sections. The plug 205 is fitted onto the striker 2031 and secured at the steps, its lip adaptively adhering to the surface of the striker 2031 under colloid pressure. The lower end face of the guide sleeve 204 abuts against the upper end face of the plug 205, forming a double-sealing structure: the plug 205 prevents colloid leakage upwards along the striker 2031, and the guide sleeve 204 mechanically compresses to prevent axial movement of the plug 205. By separating the sealing and guiding functions, the plug 205 only performs the sealing task, avoiding seal failure due to wear of the guide sleeve 204. Simultaneously, the axial positioning of the plug 205 by the guide sleeve 204 prevents the sealing ring from flipping under high-pressure colloid impact, further improving the operational stability of the fluid assembly 20. Optionally, the plug 205 can be a sealing ring made of fluororubber, polyurethane, nitrile rubber, ethylene propylene rubber, polytetrafluoroethylene lip, etc., selected based on the adhesive or actual application scenario.

[0046] In one embodiment, please refer to Figure 10 To facilitate the installation of the guide sleeve 204 in the mounting cavity, a clearance groove 204a is formed at the end of the guide sleeve 204 near the plug 205, and the clearance groove 204a extends radially along the guide sleeve 204.

[0047] The air-blocking groove 204a is a straight groove located at the bottom and extending radially along the guide sleeve 204. During installation of the guide sleeve 204, the air-blocking groove 204a can accommodate a portion of the air to ensure a tight fit between the guide sleeve 204 and the inner wall of the mounting base 201. This prevents air from being trapped between the guide sleeve 204, the mounting base 201, and the plug 205, which could lead to difficulty in pressing the guide sleeve 204 down and improper installation. Furthermore, by providing the air-blocking groove 204a, when the plug 205 is not replaced or damaged in time, the adhesive, after flowing upwards through the plug 205, can overflow out of the housing 1 through the air-blocking groove 204a of the guide sleeve 204 and the opening on the side wall of the mounting base 201, preventing it from flowing into the piezoelectric jetting body 10 and causing damage.

[0048] In an alternative embodiment, please refer to Figures 8 to 10To facilitate the stable installation of the nozzle 202, the fluid assembly 20 also includes a nut 206. The inner peripheral wall of the nut 206 is provided with an internal thread, and the outer peripheral wall of the mounting base 201 is provided with an external thread. The internal thread and the external thread are screwed together so that the bottom wall of the mounting base 201 and the side of the bottom wall of the nut 206 facing the mounting base 201 clamp the top of the nozzle 202. The bottom wall of the nut 206 is provided with a through hole, and the bottom end of the nozzle 202 extends outward through the through hole.

[0049] The nut 206 is a cap-like structure with internal threads and a through hole at the bottom. The outer wall of the mounting base 201 is machined with matching external threads. Rotating the nut 206 creates a clamping force between the bottom surface of the mounting base 201 and the inner bottom surface of the nut 206, securing the tip of the nozzle 202. The through hole in the bottom wall of the nut 206 allows the tip of the nozzle 202 to protrude. Specifically, the bottom wall of the mounting base 201 has a positioning hole. The tip of the nozzle 202 is radially limited by the positioning hole, and the clamping force between the nut 206 and the mounting base 201 provides axial fixation for the nozzle 202, ensuring the accuracy and stability of the nozzle 202 installation, and thus ensuring the stability of fluid jetting. Furthermore, this structure facilitates rapid replacement of the nozzle 202: when the nozzle 202 becomes clogged due to colloid solidification or wear, it can be removed simply by loosening the nut 206, without disassembling the entire fluid assembly 20, significantly reducing maintenance time. Furthermore, the nut 206 also protects the bottom of the mounting base 201, reducing damage to the mounting base 201 caused by external collisions or other interference.

[0050] In one embodiment, please refer to Figures 8 to 10 To enable fluid transport within the fluid assembly 20, the fluid assembly 20 also includes an inlet nozzle 207, an inlet nozzle base 208, and a flow channel 209. The inlet nozzle 207 is connected to the inlet nozzle base 208, and the two ends of the flow channel 209 in the length direction are respectively connected to the inlet nozzle base 208 and the mounting base 201. The inlet nozzle 207, the inlet nozzle base 208, the flow channel 209, and the mounting base 201 are connected in sequence and form a colloid channel inside.

[0051] The bottom end of the nozzle 207 is connected to the nozzle base 208, and the top end is connected to the syringe 301 via a Luer interface or thread. The nozzle base 208 serves as a transition piece, and its interior communicates with the nozzle 207. The flow channel 209 connects the nozzle base 208 and the mounting base 201, forming a continuous colloid channel within all three. The modular design of the nozzle base 208 allows for adaptation to different installation spaces by replacing the flow channel 209 with different lengths. The flow channel 209 can be made of metal to withstand corrosive colloids. Sealing rings are provided at the connection points between the nozzle 207 and the nozzle base 208, between the nozzle base 208 and the flow channel 209, and between the flow channel 209 and the mounting base 201 to ensure a sealed connection.

[0052] In one embodiment, please refer to Figures 8 to 10 To facilitate cleaning and maintenance of the flow channel 209, the fluid assembly 20 also includes a plug 210, which is connected to the end of the flow channel 209 away from the mounting base 201 to achieve lateral sealing of the colloid channel.

[0053] Because the flow direction of the colloid needs to change during its journey from the inlet nozzle 207 to the mounting base 201, a corner is present in the flow channel 209 to alter this flow direction. When the colloid reaches the corner, it is easily affected by flow resistance and becomes stagnant. Over time, some of the colloid solidifies at the corner, causing blockage of the flow channel 209. Therefore, to facilitate regular cleaning and maintenance of the flow channel 209, a removable plug 210 is installed at the corner of the flow channel 209 to facilitate opening and cleaning. The plug 210 is threaded to the end of the flow channel 209, and its outer peripheral wall forms a metal hard seal with the inner wall of the flow channel 209. A sealing ring is provided at the connection to improve the sealing effect. This provides a closed port during cleaning and maintenance of the flow channel 209, preventing colloid leakage from the non-working end. The end of the plug 210 can be machined with an internal hexagonal or slotted groove for easy and quick installation and removal using standard tools.

[0054] In an alternative embodiment, please refer to Figure 11 To facilitate heating of the syringe and nozzle 202, the piezoelectric jetting device 100 also includes a syringe assembly 30 and a nozzle heating assembly 40. The syringe assembly 30 includes a syringe and a syringe heating structure. A cavity is formed inside the syringe to accommodate the colloid. The bottom end of the syringe is connected to the colloid inlet 207. The syringe heating structure is connected to the outer peripheral wall of the syringe to heat the syringe. The nozzle heating assembly 40 includes a flow channel mounting base and a heating structure. The flow channel mounting base has a mounting surface. The flow channel 209 is mounted on the mounting surface. The heating structure is connected to the flow channel mounting base to heat the flow channel 209.

[0055] The syringe heating structure includes an outer cover, a syringe mounting component, a heating element, and a connector. The syringe mounting component forms a cavity to accommodate the syringe. The outer cover is fitted onto the syringe mounting component, and an installation space is formed between the inner peripheral wall of the outer cover and the outer peripheral wall of the syringe mounting component. The heating element covers the outer peripheral wall of the syringe mounting structure and is located within the installation space. The connector is electrically connected to the heating element to achieve heating of the syringe.

[0056] The flow channel mounting base includes a heating block 401, a heat insulation block 402, and a mounting block 403. The heating block 401, heat insulation block 402, and mounting block 403 are connected in sequence and have a mounting surface on their top. The flow channel 209 is located on the mounting surface. The bottom of the heating block 401 has a through hole for the nut 206 to pass through. The end of the heating block 401 away from the heat insulation block 402 has an adjustable opening. The two sides of the opening are connected by fastening screws 401a. By rotating the fastening screws 401a, the size of the opening can be adjusted, thereby adjusting the size of the through hole at the bottom of the heating block 401. This allows the heating block 401 to clamp the side wall of the nut 206, achieving a fixed connection between the heating block 401 and the nut 206. At the same time, the heating block 401 can also better transfer heat to the nozzle 202.

[0057] The flow channel mounting base has a first mounting hole and a second mounting hole formed inside, both extending along the length of the flow channel mounting base and spaced apart along its width. A heating rod 407 is located in the first mounting hole, and a second temperature sensor 408 is located in the second mounting hole. A corrugated pipe 404 is connected to a mounting block 403, a connector mounting base 405 is connected to the corrugated pipe 404, and a cable connector 406 is connected to the connector mounting base 405. The connecting cable 7 for the heating rod 407 and the temperature sensor passes sequentially through the insulation block 402, the mounting base 201, the corrugated pipe 404, and the connector mounting base 405, connecting to the cable connector 406. The controller then connects to the cable connector 406 to control the heating temperature of the nozzle heating assembly 40. The insulation block 402 effectively concentrates the temperature of the nozzle heating assembly 40 on the heating block 401, making the temperature measured by the temperature sensor closer to the temperature of the nozzle 202, thus ensuring effective heating. In addition, the heating rod 407 located below the flow channel 209 can also heat the flow channel 209 to a certain extent, preventing the colloid from solidifying in the flow channel 209 and ensuring the smooth flow of the colloid in the fluid assembly 20.

[0058] In this design, the drive module 2 can be pre-packaged as a single module. During assembly, the operator only needs to connect the connecting wires of the piezoelectric ceramic component 22 and the first temperature sensor 31 in the drive module 2 to the connectors of the control board 32 via connectors. Then, the drive module 2 is pushed into the mounting channel of the housing 1 and fixed in place, thus realizing the installation of the housing 1 and the drive module 2 in the piezoelectric jet body 10. The control board 32 is connected to the drive cable 33 and the signal line 34 to transmit the lifespan and temperature values ​​of the piezoelectric ceramic body 222 to the controller. At the same time, the controller connects to the piezoelectric ceramic 21 via the drive cable 6 and the signal line 7 and controls its operation.

[0059] Please refer to Figure 1 , Figures 12 to 15 The assembly process of the piezoelectric injection device 100 in this solution is described in detail below: The first step is to turn the wrench 64 on the piezoelectric jet body 10 to a certain angle so that the fastening ball 62 retracts into the connecting channel.

[0060] The second step is to offset the second lug 201b of the mounting base 201 in the fluid assembly 20 from the first lug 231a on the adjusting seat 231 in the piezoelectric jet body 10, and then install the mounting base 201 in the fluid assembly 20 onto the adjusting seat 231. Figure 12 ).

[0061] Thirdly, after the mounting base 201 is pushed into the cavity of the adjusting base 231, the fluid assembly 20 is rotated at a certain angle so that the second lug 201b on the mounting base 201 in the fluid assembly 20 is placed on the first lug 231a of the adjusting base 231 in the piezoelectric jet body 10. Figure 13 The final installation position of the fluid assembly 20 and the piezoelectric jet body 10 can be in a conventional horizontal state. If there is interference between the machine equipment and the fluid assembly 20 and the piezoelectric jet body 10 in a horizontal state, the fluid assembly 20 can also be adjusted 90° to the left or right relative to the piezoelectric jet body 10.

[0062] Fourth step, turn the wrench 54 on the piezoelectric jet body 10 to a certain angle so that the fastening ball 52 abuts against the recess 201a on the side wall of the mounting base 201. Figure 13 ).

[0063] Step 5: Install the syringe 301 heating assembly onto the piezoelectric jet body 10. Figure 14 ).

[0064] Step 6: Install the nozzle heating assembly 40 onto the piezoelectric jet body 10, and then tighten the fastening screws 401a on the side of the nozzle heating assembly 40 to complete the installation of the entire piezoelectric jet device 100. Figure 15 ).

[0065] In this design, the fluid component 20 is connected to the piezoelectric jet body 10 using a quick-release installation method, simplifying installation, shortening maintenance time, and improving work efficiency. The piezoelectric jet device 100 adjusts the height of the adjusting seat 41 by rotating the knob on the adjusting rod 42 on the piezoelectric jet body 10, thereby adjusting the relative position of the nozzle 202 and the striking pin 2031. This simplifies operation and prevents workers from being burned by the nozzle heating component 40 during the adjustment of the nut 206. The optimized structural design of the nozzle heating component 40 simultaneously heats both the nozzle 202 and the flow channel 209, reducing the temperature difference between the measured temperature by the second temperature sensor 408 in the nozzle heating component 40 and the required temperature at the nozzle 202.

[0066] Temperature and lifespan monitoring are performed on the piezoelectric ceramic body 222, the power element of the fluid piezoelectric jet body 10. A PT100 component is attached to the surface of the piezoelectric ceramic body 222 to transmit the monitored temperature to the controller. The lifespan monitoring module of the piezoelectric ceramic body 222 is packaged into a small PCB board and built into the housing 1 of the piezoelectric jet body 10. In addition, the controller of the piezoelectric jet device 100 in this solution contains a control board, which integrates heating function and can control the syringe 301 heating component and the nozzle heating component 40. Therefore, only one controller is needed to control the three modules in the piezoelectric jet device 100.

[0067] The above description is merely an exemplary embodiment of the present invention and does not limit the patent scope of the present invention. Any equivalent structural transformations made using the contents of the present invention's specification and drawings under the technical concept of the present invention, or direct / indirect applications in other related technical fields, are included within the patent protection scope of the present invention.

Claims

1. A piezoelectric ejection body, characterized by, The utility model relates to a kind of piezoelectric jetting main body and piezoelectric jetting device, including: Shell, the shell is formed with installation space; Driving module, the driving module includes installation shell, two groups of piezoelectric ceramic components, two groups of adjusting components and lever assembly, the cavity is formed in the installation shell, each piezoelectric ceramic component includes piezoelectric ceramic body and the upper hinge and lower hinge respectively connected to the upper and lower ends of piezoelectric ceramic body, the lever assembly includes pivot and lever, the pivot is connected to the installation shell, the lever is rotatably connected with the pivot, the lower hinge of two piezoelectric ceramic components is connected to the lever respectively, and located at the opposite sides of the pivot, each adjusting component is connected to the upper hinge to adjust the pre-tightening force of piezoelectric ceramic body respectively;The driving module is integrally and detachably connected to the installation space.

2. The piezoelectric ejection body of claim 1, wherein, The side wall of the shell is formed with mounting channel, and the driving module is connected to the installation space along the mounting channel.

3. The piezoelectric jet body of claim 1, wherein, Each group of adjusting components includes torque screw, concave block and ceramic ball, the opposite ends of the concave block are connected with the ceramic ball and the torque screw respectively, and the side of the ceramic ball away from the concave block abuts against the upper hinge.

4. The piezoelectric jet body of claim 3, wherein, The piezoelectric jetting body further includes a first temperature sensor, a control board, a driving cable and a signal line, the first temperature sensor is connected to the side wall of the piezoelectric ceramic body, the piezoelectric ceramic body and the first temperature sensor are electrically connected with the control board, the driving cable and the signal line are electrically connected with the control board and are used for connecting the control board with an external controller.

5. The piezoelectric ejection body of any one of claims 1 to 4, wherein, The top end of the shell is formed with an air inlet hole and an air outlet hole, the air inlet hole and the air outlet hole are both communicated with the cavity, the position of the air inlet hole is connected with an air inlet nozzle, the position of the air outlet hole is connected with an air outlet nozzle, and the air inlet nozzle and the air outlet nozzle are used to connect a gas pipe.

6. The piezoelectric jet body of claim 5, wherein, The piezoelectric jetting body further includes an adjusting module, the adjusting module includes an adjusting seat, an adjusting rod and a limit pin, the adjusting seat is connected to the bottom end of the shell to connect a fluid component, the adjusting rod partially extends into the shell and connects the adjusting seat, the opposite sides of the side wall of the adjusting seat are both formed with an opening, the limit pin includes two, the two limit pins are clamped in the shell and are respectively located in the openings on the two sides of the adjusting seat, the limit pin can abut against the top wall of the opening to limit the stroke of the adjusting seat descending, and the end of the lever away from the piezoelectric ceramic component extends into the opening to connect a fluid component.

7. The piezoelectric jet body of claim 6, wherein, The piezoelectric jet body further comprises a fluid mounting assembly, the fluid mounting assembly comprises a rotating shaft, a fastening ball, a pre-tightening spring and a wrench, an outer peripheral wall of the rotating shaft is extended to form a mounting groove with gradually shallower / deeper depth, the adjusting seat and the shell enclose a rotating shaft mounting cavity, one end of the rotating shaft in the axial direction is arranged in the rotating shaft mounting cavity, the other end partially extends out of the rotating shaft mounting cavity and is connected with the wrench, the adjusting seat further forms a through cavity penetrating in the up-down direction, a connecting channel is formed between the through cavity and the rotating shaft mounting cavity, the fastening ball is arranged in the connecting channel and one end of the fastening ball abuts against the mounting groove, the wrench can drive the rotating shaft to rotate so that one end of the fastening ball away from the rotating shaft is exposed in the through cavity, the pre-tightening spring is sleeved on the rotating shaft, and both ends of the pre-tightening spring in the axial direction abut against the bottom wall of the shell and the rotating shaft respectively.

8. A piezoelectric ejection device, characterized by comprising: The piezoelectric jet body as claimed in any one of claims 1 to 7, and The fluid assembly comprises a mounting seat and a striker assembly, a mounting cavity is formed in the mounting seat, a nozzle is connected to the bottom end of the mounting cavity, the striker assembly comprises a striker and a striker spring, the striker is arranged in the mounting cavity, the striker spring is sleeved on the striker, the mounting seat and the striker enclose a glue injection cavity, and the striker can move up and down along the mounting seat to extrude the glue in the glue injection cavity to the nozzle for spraying.

9. The piezoelectric ejection device of claim 8, wherein, The fluid assembly further comprises a glue inlet nozzle, a glue inlet nozzle base and a flow channel, the glue inlet nozzle is connected to the glue inlet nozzle base, both ends of the flow channel in the length direction are connected with the glue inlet nozzle base and the mounting seat respectively, the glue inlet nozzle, the glue inlet nozzle base, the flow channel and the mounting seat are sequentially communicated and internally form a glue passage.

10. The piezoelectric ejection device of claim 9, wherein, The piezoelectric jet device further comprises a needle cylinder assembly and a nozzle heating assembly; the needle cylinder assembly comprises a needle cylinder and a needle cylinder heating structure, a containing cavity is formed in the needle cylinder to contain glue, the bottom end of the needle cylinder is communicated with the glue inlet nozzle, and the needle cylinder heating structure is connected to the outer peripheral wall of the needle cylinder to heat the needle cylinder; The nozzle heating assembly comprises a flow channel mounting seat and a heating structure, the flow channel mounting seat forms a mounting face, the flow channel is mounted on the mounting face, and the heating structure is connected to the flow channel mounting seat to heat the flow channel.

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