Nozzle adjustment assembly and piezoelectric jet valve

Abstract

The application is suitable for the technical field of piezoelectric injection valve, and particularly relates to a nozzle adjusting assembly and a piezoelectric injection valve. The nozzle adjusting assembly is used for being assembled on the piezoelectric injection valve, and comprises an adjusting rod and an adjusting body. The adjusting rod is used for rotating around its own axis, and the position of the adjusting rod in the length direction of the adjusting rod is unchanged. The adjusting body is connected with the adjusting rod through threads. The adjusting body is moved in the length direction of the adjusting rod through the rotation of the adjusting rod. The adjusting body is used for driving the nozzle of the piezoelectric injection valve to move in the length direction of the adjusting rod, so as to adjust the distance between the nozzle and the striker of the piezoelectric injection valve. The rotating operation end of the adjusting rod and the nozzle are respectively arranged at two opposite ends of the piezoelectric injection valve. The technical problem that the existing means for adjusting the distance between the nozzle and the striker is loose due to the high-speed impact of the striker and the nozzle, and the valve body is unstable in operation is solved.

Description

Technical Field

[0001] This application relates to the field of piezoelectric injection valve technology, and more specifically, to a nozzle adjustment assembly and a piezoelectric injection valve. Background Technology

[0002] In piezoelectric jet valves, voltage is converted into mechanical force, and the deformation is amplified by a stroke amplification component to drive the striker to move and strike the nozzle of the valve body seat. This generates high pressure on the fluid between the striker and the nozzle, which is then ejected at high speed from the nozzle opening, forming a jet dispensing action. Because piezoelectric ceramics have small, fast, and stable deformation, they can form high-speed micro-dispensing and are widely used in piezoelectric jet valves.

[0003] Currently, when calibrating the difference between the nozzle and the striker in piezoelectric valves in the industry, the nozzle is fixed on the nozzle seat, and the nozzle seat is adjusted by screwing on the nut to achieve a suitable spray state. During the operation of the piezoelectric injection valve, the striker and the nozzle collide at high speed, generating vibration that can loosen the nozzle seat and cause the nozzle position to move, resulting in unstable valve operation. Summary of the Invention

[0004] The purpose of this application is to provide a nozzle adjustment assembly and a piezoelectric injection valve, which aims to solve the technical problem that the existing methods for adjusting the gap between the nozzle and the firing pin cause the nozzle seat to loosen due to the high-speed impact between the firing pin and the nozzle, resulting in unstable valve operation.

[0005] To achieve the above objectives, the technical solution adopted in this application is as follows: Firstly, a nozzle adjusting assembly is provided for mounting on a piezoelectric injection valve, comprising:

[0006] An adjusting rod, wherein the adjusting rod is rotatable about its own axis while its position remains unchanged along its own length; and

[0007] An adjusting body is connected to the adjusting rod by a thread. The adjusting body moves along the length of the adjusting rod by rotating the adjusting rod. The adjusting body is used to drive the nozzle of the piezoelectric injection valve to move along the length of the adjusting rod to adjust the distance between the nozzle and the striking pin of the piezoelectric injection valve. The rotating operating end of the adjusting rod and the nozzle are respectively located at opposite ends of the piezoelectric injection valve.

[0008] In one embodiment of the first aspect, a threaded sleeve is provided on the adjusting rod, the threaded sleeve having an external thread, the threaded sleeve being rotatably limited relative to the adjusting rod, the adjusting body having an internal thread portion adapted to the external thread, the threaded sleeve being threadedly fitted into the internal thread portion, and the position of the threaded sleeve in the length direction of the adjusting rod being adjustable.

[0009] In one embodiment of the first aspect, a threaded nut is further fitted onto the adjusting rod, the nut being used to abut against one end of the threaded sleeve, and the nozzle adjusting assembly further includes a first spring, the first spring pressing between the valve body and the adjusting body of the piezoelectric injection valve, the first spring pushing against the adjusting body to make the threaded sleeve fit tightly against the nut.

[0010] In one embodiment of the first aspect, a guide groove is provided on the adjusting rod, the guide groove being provided along the length direction of the adjusting rod, and a receiving groove is provided on the inner wall of the screw sleeve, the receiving groove being opposite to and communicating with the guide groove, the guide groove and the receiving groove jointly accommodating a guide bead.

[0011] In one embodiment of the first aspect, the nozzle adjustment assembly further includes a guide rod, the guide rod being fixedly connected to the adjustment body, the length direction of the guide rod being parallel to the length direction of the adjustment rod, and the valve body of the piezoelectric injection valve having a guide hole adapted to the guide rod.

[0012] In one embodiment of the first aspect, the regulating body includes

[0013] The nozzle adjusting assembly includes a cylindrical portion with a side opening, and a limiting rod fixedly disposed relative to the cylindrical portion. The limiting rod abuts against two opposing edges of the side opening along the length of the cylindrical portion to limit the extreme positions of the adjusting body's movement along the length of the adjusting rod.

[0014] An extension portion extends in a direction perpendicular to the axis of the cylindrical portion, and a guide rod is disposed on the extension portion.

[0015] The nozzle adjustment assembly provided in this application does not adjust the nozzle position by turning a nut, but by using an adjustment rod and an adjustment body. Turning the adjustment rod moves the adjustment body, similar to a lead screw, while the adjustment body moves the nozzle. This allows for adjustment of the gap between the nozzle and the firing pin. The adjustment position is far from the vibration source and will not be affected by the vibration of the valve body, thus ensuring the stability of the valve body.

[0016] This application also provides a piezoelectric injection valve equipped with the nozzle adjustment assembly described in any of the above embodiments.

[0017] In one embodiment of the second aspect, the piezoelectric injection valve includes a valve body, a flow channel assembly, and a component mounted within the valve body:

[0018] The firing pin assembly includes a firing pin for striking a nozzle; and

[0019] A piezoelectric assembly is used to trigger the striking pin to strike the nozzle, and a flow channel assembly is used for liquid supply;

[0020] The flow channel assembly includes a liquid box, which has a connected liquid supply channel and a liquid storage channel. The nozzle is located in the liquid storage channel, and the lower end of the striker is located inside the liquid storage channel. The liquid box is fixedly connected to the adjusting body.

[0021] In one embodiment of the second aspect, the firing pin assembly further includes:

[0022] A firing pin guide sleeve, wherein the firing pin passes through the firing pin guide sleeve, and the firing pin guide sleeve is partially located within the liquid storage channel and partially located within the regulating body; and

[0023] The second spring is sleeved on the striker guide sleeve and is used to push the upper end of the striker against the trigger part of the piezoelectric assembly.

[0024] In one embodiment of the second aspect, the piezoelectric component includes:

[0025] A piezoelectric element, wherein a voltage is applied to the piezoelectric element to elongate its length;

[0026] The stroke amplification assembly is used to trigger the striker when one end of the piezoelectric element extends.

[0027] A limiting mechanism, the limiting mechanism abutting against the other end of the piezoelectric element; and

[0028] A spring assembly, comprising a spring seat and a third spring disposed within the spring seat, the third spring being used to push the stroke amplification component to reset.

[0029] The beneficial effect of the piezoelectric injection valve provided in this application is that the piezoelectric injection valve is equipped with the above-mentioned nozzle adjustment component, which can both adjust the nozzle position and ensure the stability of the valve body operation. Attached Figure Description

[0030] To more clearly illustrate the technical solutions in the embodiments of this application, 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 this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0031] Figure 1 This is a schematic diagram of the structure of the nozzle adjustment assembly provided in the embodiments of this application;

[0032] Figure 2 for Figure 1A schematic diagram of the structure of the adjusting rod, the screw sleeve, and the nut;

[0033] Figure 3 for Figure 1 Schematic diagram of the structure of the regulator;

[0034] Figure 4 A schematic diagram of a piezoelectric injection valve equipped with a nozzle adjustment assembly, provided for another embodiment of this application;

[0035] Figure 5 for Figure 4 Internal structure diagram;

[0036] Figure 6 for Figure 5 A schematic diagram of the structure after removing the regulator;

[0037] Figure 7 for Figure 6 A schematic diagram of the structure after removing the spring seat and nut;

[0038] Figure 8 for Figure 7 Cross-sectional view of the liquid box, the firing pin guide sleeve, and the firing pin.

[0039] In the diagram, 1. Piezoelectric injection valve; 2. Adjusting rod; 3. Adjusting body; 4. Cylindrical part; 5. Limiting rod; 6. Side opening; 7. Extension part; 8. Nozzle; 9. Nut; 10. Strike pin; 11. Screw sleeve; 12. Nut; 13. First spring; 14. Guide groove; 15. Receiving groove; 16. Guide ball; 17. Guide rod; 18. Flow channel assembly; 19. Liquid supply channel; 20. Liquid storage channel; 21. Liquid box; 22. Strike pin guide sleeve; 23. Second spring; 24. Piezoelectric element; 25. Stroke amplification assembly; 26. Limiting mechanism; 27. Third spring; 28. Spring seat; 29. ​​Hooking protrusion; 30. Adhesive supply connector; 31. Side plug screw; 32. Control assembly; 33. Internal thread part; 34. Valve body. Detailed Implementation

[0040] To make the technical problems, technical solutions, and beneficial effects to be solved by this application clearer, the following detailed description is provided in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and are not intended to limit the scope of this application.

[0041] It should be noted that when a component is referred to as being "fixed to" or "set on" another component, it can be directly on or indirectly on that other component. When a component is referred to as being "connected to" another component, it can be directly connected to or indirectly connected to that other component.

[0042] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this application, "multiple" means two or more, unless otherwise expressly specified. "Several" means one or more, unless otherwise expressly specified.

[0043] In the description of this application, it should be understood that the terms "center", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application.

[0044] In the description of this application, it should be noted that, unless otherwise expressly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0045] Please see Figure 1 , Figure 2 and Figure 3 As shown, this application first provides a specific embodiment of a nozzle adjustment assembly, which is used to be mounted on a piezoelectric injection valve 1.

[0046] The nozzle adjustment assembly provided in this embodiment specifically includes an adjustment rod 2 and an adjustment body 3.

[0047] The adjusting rod 2 is used to rotate around its own axis while maintaining its position along its own length.

[0048] The adjusting body 3 and the adjusting rod 2 are connected by a thread. The adjusting body 3 moves along the length of the adjusting rod 2 by rotating the adjusting rod 2. The adjusting body 3 is used to drive the nozzle 8 of the piezoelectric injection valve 1 to move along the length of the adjusting rod 2 to adjust the distance between the nozzle 8 and the striker 10 of the piezoelectric injection valve 1. The rotating operation end of the adjusting rod 2 and the nozzle 8 are respectively located at two opposite ends of the piezoelectric injection valve 1.

[0049] Specifically, the adjusting rod 2 has a certain length, and one end of the adjusting rod 2 is exposed from the surface of the valve body 34, that is, the rotation operation end is exposed from the valve body 34. By driving this operation end, the adjusting rod 2 can be rotated.

[0050] The adjusting rod 2 can be an adjusting bolt. A stepped hole is provided on the outer wall of the valve body 34. The adjusting bolt passes through the stepped hole, and the top part of the adjusting bolt (which can be a nut) can be inserted into the stepped hole. This prevents the adjusting bolt from moving down and keeps the position of the adjusting rod 2 unchanged in its own length direction.

[0051] Meanwhile, a gasket is squeezed between the top of the adjusting bolt (which can be a nut) and the stepped hole to achieve a sealing effect and ensure the airtightness of the valve body 34.

[0052] The adjusting rod 2 extends into the valve body 34 by a certain length.

[0053] The adjusting body 3 is located inside the valve body 34 and is connected to the adjusting rod 2 by a thread. The adjusting body 3 cannot rotate inside the valve body 34, but it can move along the length of the adjusting rod 2.

[0054] The adjusting body 3 and the adjusting rod 2 can be directly connected by threads or indirectly connected by threads. That is, they can be connected to other structures, with threads set on other structures, and then connected to each other by threads through other structures.

[0055] By means of a lead screw, when the adjusting rod 2 is rotated, the adjusting body 3 can move within the valve body 34.

[0056] The adjusting body 3 is connected to the nozzle 8, which allows the nozzle 8 to be adjusted in position, thereby adjusting the distance between the nozzle 8 and the striking pin 10.

[0057] The rotating operating end of the adjusting rod 2 and the nozzle 8 are respectively located at opposite ends of the piezoelectric injection valve 1. That is, this adjusting device spans the entire valve body 34 horizontally or vertically. Therefore, the adjusting device itself is far away from the nozzle 8, which can avoid the influence of vibration at the nozzle 8 and prevent the position of the nozzle 8 from changing, thus ensuring the stability of the valve.

[0058] like Figure 2 and Figure 3 As a preferred embodiment provided in this embodiment, this embodiment is further configured such that a screw sleeve 11 is provided on the adjusting rod 2, the screw sleeve 11 has an external thread, the screw sleeve 11 is rotated and limited relative to the adjusting rod 2, the adjusting body 3 has an internal thread portion 33 adapted to the external thread, the screw sleeve 11 is threadedly assembled in the internal thread portion 33, and the position of the screw sleeve 11 in the length direction of the adjusting rod 2 is adjustable.

[0059] Specifically, the adjusting rod 2 provided in this embodiment does not have an external thread, but has a threaded sleeve 11. The threaded sleeve 11 has a ring structure and is fitted onto the adjusting rod 2. The so-called rotation limit of the threaded sleeve 11 relative to the adjusting rod 2 means that the threaded sleeve 11 cannot rotate relative to the adjusting rod 2, that is, the two cannot rotate relative to each other. Therefore, when the adjusting rod 2 rotates, the threaded sleeve 11 rotates accordingly.

[0060] The screw sleeve 11 has an external thread, while the adjusting body 3 has an internal thread 33. The screw sleeve 11 is fitted into the internal thread 33 and is screwed together. In this way, when the adjusting rod 2 rotates, the adjusting body 3 will move in the length direction of the adjusting rod 2, thereby adjusting the position of the nozzle 8.

[0061] Furthermore, this embodiment also provides that the position of the screw sleeve 11 in the length direction of the adjusting rod 2 is adjustable.

[0062] Specifically, the screw sleeve 11 can be adjusted in the length direction of the adjusting rod 2, and can be positioned after adjustment. This is equivalent to adjusting the initial position of the adjusting body 3, that is, the initial position of the nozzle 8. Then the adjusting rod 2 can be turned to adjust the position of the nozzle 8, avoiding the phenomenon that the nozzle 8 is still not adjusted in place when it is outside the adjustment range of the adjusting rod 2.

[0063] The advantage of this embodiment is that the threaded connection between the screw sleeve 11 and the adjusting body 3 makes the structure simple, the assembly reasonable, and the adjustment easy.

[0064] like Figure 1 , Figure 2 and Figure 3 As a preferred embodiment provided in this example, a threaded nut 12 is also fitted on the adjusting rod 2. The nut 12 is used to abut one end of the threaded sleeve 11. The nozzle adjusting assembly also includes a first spring 13. The first spring 13 is pressed between the valve body 34 of the piezoelectric injection valve 1 and the adjusting body 3. The first spring 13 pushes the adjusting body 3 to make the threaded sleeve 11 fit tightly against the nut 12.

[0065] Specifically, the position of the screw sleeve 11 along the length of the adjusting rod 2 is adjustable. The adjustment is as follows: the screw sleeve 11 is fitted onto the adjusting rod 2 and can move along the length of the adjusting rod 2. After the position is adjusted to the required location, the nut 12 is turned so that it abuts against one end of the screw sleeve 11. At the same time, the first spring 13 pushes the adjusting body 3, which in turn moves the screw sleeve 11 so that it is pressed tightly against the nut 12, thus achieving the positioning of the screw sleeve 11.

[0066] Another way to understand it is that, due to the presence of the first spring 13, the threaded sleeve 11 is pressed tightly against the nut 12, eliminating the fit clearance. The nut 12 limits the threaded sleeve 11, thus positioning the threaded sleeve 11. When it is necessary to adjust the position of the threaded sleeve 11, the nut 12 can be turned to push the threaded sleeve 11. Due to the action of the first spring 13, the threaded sleeve 11 always presses against the nut 12, which also plays a role in preventing the adjusting rod 2 from loosening.

[0067] Therefore, this embodiment provides a technical means and implementation method for adjusting and positioning the screw sleeve 11. The adjustment can be done by simply turning the nut 12. The adjustment is simple, convenient and reasonable and easy to operate.

[0068] like Figure 2 Furthermore, in order to enable the screw sleeve 11 to move along the length of the adjusting rod 2 for positioning adjustment, and to enable the screw sleeve 11 to rotate with the adjustment rod 2, this embodiment is further configured as follows: a guide groove 14 is provided on the adjusting rod 2, the guide groove 14 is provided along the length of the adjusting rod 2, and a receiving groove 15 is provided on the inner wall of the screw sleeve 11, the receiving groove 15 is opposite to and connected to the guide groove 14, and the guide groove 14 and the receiving groove 15 together accommodate the guide bead 16.

[0069] Specifically, the threaded sleeve 11 has an annular structure, and the receiving groove 15 can be set at the hole wall of the threaded sleeve 11. The inner surface of the receiving groove 15 can be a spherical arc surface, which can be a hemispherical hole or a multi-hemispherical hole. When the guide bead 16 is placed in the receiving groove 15, the guide bead 16 is partially exposed from inside the receiving groove 15, and the exposed part is located in the guide groove 14.

[0070] The outer wall of the adjusting rod 2 fits against the hole wall of the threaded sleeve 11, and the guide groove 14 and the receiving groove 15 are positioned opposite each other, thus locking the guide ball 16. Because part of the guide ball 16 is located within the guide groove 14 and cannot slide out of the receiving groove 15, when the adjusting rod 2 rotates, it actuates the guide ball 16, thereby causing the threaded sleeve 11 to rotate. This achieves the rotation of the threaded sleeve 11 along with the adjusting rod 2.

[0071] In addition, since the guide groove 14 has a certain length, the guide ball 16 can move within the guide groove 14 under the push of the nut 12, thereby enabling the screw sleeve 11 to move in the length direction of the adjusting rod 2 and realize the adjustment of the positioning position.

[0072] It should be noted that the guide groove 14 has a certain length, and the two ends of the guide groove 14 are the two extreme positions where the screw sleeve 11 can be adjusted up and down.

[0073] The advantage of this embodiment is that it realizes the rotation of the screw sleeve 11 with the adjusting rod 2 and the movement on the adjusting rod 2. With the help of the guide bead 16, it can move well in the length direction because the guide bead 16 can roll. At the same time as setting the guide bead 16, the screw sleeve 11 can rotate relative to the adjusting rod 2 by means of the locking effect of the guide bead 16. Furthermore, the adjustment range of the screw sleeve 11 depends on the length of the guide groove 14, which increases the accuracy and convenience of adjustment.

[0074] like Figure 1 As a preferred embodiment provided in this example, in order to ensure that the adjusting body 3 can only move within the valve body 34 and cannot rotate, the nozzle adjusting assembly also includes a guide rod 17. The guide rod 17 is fixedly connected to the adjusting body 3. The length direction of the guide rod 17 is parallel to the length direction of the adjusting rod 2. The valve body 34 is provided with a guide hole that matches the guide rod 17.

[0075] Specifically, this embodiment provides a guide rod 17, which is inserted into a suitable guide hole. The function of the guide rod 17 is to first provide guidance for the movement of the adjusting body 3, ensuring that the adjusting body 3 can move along the correct orientation. Furthermore, due to the presence of the guide rod 17, the possible rotation of the adjusting body 3 is effectively prevented.

[0076] like Figure 1 and Figure 3 In this embodiment, the adjusting body 3 includes a cylindrical part 4 and an extension part 7.

[0077] The cylindrical part 4 has a side opening 6, and the nozzle adjustment assembly also includes a limiting rod 5 fixedly disposed relative to the cylindrical part 4. The limiting rod 5 is used to abut against the two opposite edges of the side opening 6 in the length direction of the cylindrical part 4 to limit the extreme positions of the two ends of the adjustment body 3 in the length direction of the adjustment rod 2.

[0078] The extension 7 extends in a direction perpendicular to the axis of the cylindrical part 4, and the guide rod 17 is provided on the extension 7.

[0079] Specifically, the cylindrical part 4 is a hollow structure, and the internal thread part 33 can be provided on a section of the inner wall near the end of the cylindrical part 4. The threaded sleeve 11 is threaded to the upper end of the cylindrical part 4 and is threaded to the internal thread.

[0080] The cylindrical part 4 has side openings 6. The cross-section of the cylindrical part 4 is annular, and there are two side openings 6. The side openings 6 can be open parts with a certain area. Since the cross-section of the cylindrical part 4 is annular, the edges of the two ends of the side openings 6 in the length direction of the cylindrical part 4 are protruding. The limiting rod 5 abuts against the edge. When the adjusting body 3 moves up and down, the limiting rod 5 can lock the edge and limit the movement of the adjusting body 3, so that the adjusting body 3 can be adjusted within a certain range and will not be adjusted excessively.

[0081] Specifically, each side opening 6 has a corresponding limiting rod 5 at both ends, with the two limiting rods 5 positioned near the edges at both ends.

[0082] The extension 7 is another part of the adjusting body 3. The extension 7 extends laterally and is connected to the cylindrical part 4. The guide rod 17 can be provided on the extension 7 to achieve guidance. The extension 7 effectively utilizes the internal space of the valve body 34.

[0083] like Figure 4 This application also provides a specific embodiment of a piezoelectric injection valve 1, which is equipped with the nozzle adjustment assembly provided in any of the above embodiments.

[0084] The piezoelectric injection valve 1 provided in this embodiment is equipped with a nozzle adjustment assembly, which can ensure the stability of the valve body 34 during use.

[0085] like Figure 5 and Figure 7 Specifically, the piezoelectric injection valve 1 provided in this embodiment includes a valve body 34, a flow channel assembly 18, and a striker assembly and a piezoelectric assembly installed in the valve body 34.

[0086] The striking pin assembly includes a striking pin 10 for striking a nozzle 8. A piezoelectric component is used to trigger the striking pin 10 to strike the nozzle 8, and a flow channel assembly 18 is used for liquid supply.

[0087] Specifically, the impact pin 10 can impact the nozzle 8 at high speed under the trigger of the piezoelectric component, thereby causing the liquid to be ejected at high speed, while the flow channel assembly 18 is used to supply liquid, so that there is liquid to be ejected between the impact pin 10 and the nozzle 8.

[0088] like Figure 5 , Figure 7 and Figure 8 Furthermore, the flow channel assembly 18 includes a liquid box 21, which includes a liquid supply channel 19 and a liquid storage channel 20 that are connected to each other. The nozzle 8 is located at the liquid storage channel 20, the lower end of the striker 10 is located inside the liquid storage channel 20, and the liquid box 21 is fixedly connected to the adjusting body 3.

[0089] Specifically, the liquid supply channel 19 is also connected to the glue supply hole, and the channel assembly 18 also includes a glue supply connector 30 and a side plug screw 31. The glue supply connector 30 is provided at the glue supply hole, and the head of the liquid supply channel 19 is also provided with a side plug screw 31 to seal the liquid supply channel 19.

[0090] The adhesive injected from the supply channel 19 enters the storage channel 20.

[0091] The nozzle 8 is located at the liquid storage channel 20, and the impact end of the impact pin 10 is located inside the liquid storage channel 20 and aligned with the nozzle 8. The liquid can be ejected at high speed by the impact of the impact pin 10.

[0092] By fixing the liquid box 21 to the adjusting body 3, the liquid box 21 can move with the adjusting body 3, thereby adjusting the nozzle 8 located at the liquid storage channel 20. However, the position of the striking pin 10 remains unchanged, thus achieving the adjustment of the distance between the nozzle 8 and the striking pin 10.

[0093] The effect of this embodiment is that liquid supply and storage are achieved through the liquid supply channel 19 and liquid storage channel 20 of the liquid box 21, and spraying is achieved. Furthermore, the liquid box 21 is connected to the regulating body 3, which ultimately enables the adjustment of the nozzle 8.

[0094] like Figure 5 , Figure 7 and Figure 8 As a preferred embodiment provided in this example, the firing pin 10 assembly also includes a firing pin guide sleeve 22 and a second spring 23.

[0095] The firing pin 10 passes through the firing pin guide sleeve 22, which is partially located in the liquid storage channel 20 and partially located in the regulating body 3.

[0096] The second spring 23 is sleeved on the striker guide sleeve 22 and is used to push the upper end of the striker 10 to fit the trigger part of the piezoelectric assembly.

[0097] Specifically, in this embodiment, the adjusting body 3 and the liquid container 21 are fixedly connected together, so they can move synchronously. The striker guide sleeve 22 is partially located inside the adjusting body 3 and partially located inside the liquid storage channel 20. Therefore, when the adjusting body 3 and the liquid container 21 move, the striker guide sleeve 22 will also move accordingly. However, the striker 10 slides through the striker guide sleeve 22, so the striker 10 is stationary; that is, the striker 10 and the striker guide sleeve 22 are slidably arranged relative to each other.

[0098] A second spring 23 is provided on the striker guide sleeve 22. One end of the second spring 23 pushes the striker guide sleeve 22, and the other end pushes the striker 10, so that the striker 10 is kept in the position of adhering to the trigger part of the piezoelectric component. When the striker guide sleeve 22 moves with the adjusting body 3, the second spring 23 will be compressed, while the position of the striker 10 remains unchanged.

[0099] When the trigger pin 10 of the piezoelectric component moves downward, the second spring 23 will be compressed. As the trigger is released, the second spring 23 will push the pin 10 to maintain its contact with the trigger part again.

[0100] It should be noted that the firing pin guide sleeve 22 can extend into the liquid storage channel 20 and be relatively sealed with the liquid storage channel 20. It can be sealed by a sealing gasket. The firing pin guide sleeve 22 is also located in the adjusting body 3. When the adjusting body 3 adopts the cylindrical part 4 provided in the above embodiment, the firing pin guide sleeve 22 can be assembled in the cylindrical part 4.

[0101] The firing pin 10, firing pin guide sleeve 22, nozzle 8, and adjusting rod 2 can be arranged coaxially. Alternatively, when the adjusting body 3 adopts a cylindrical structure, it is also arranged coaxially with the inner cavity of the cylindrical structure.

[0102] The advantage of this embodiment is that it provides the assembly relationship between the impact pin guide sleeve 22, the second spring 23, the impact pin 10 and the adjusting body 3 and the liquid box 21. The assembly is reasonable and simple, and it can make the nozzle 8 move when the adjusting body 3 moves, thereby adjusting the distance between the nozzle 8 and the impact pin 10.

[0103] It should be noted that since both the striker guide sleeve 22 and the striker 10 are located inside the adjusting body 3, an opening can be made in the adjusting body 3 so that the trigger part of the piezoelectric component can extend into the adjusting body 3 and abut against the top of the striker 10.

[0104] In the above embodiment, the adjusting body 3 includes a cylindrical part 4, and a side opening 6 is provided on the side wall of the cylindrical part 4. In this embodiment, the trigger part of the piezoelectric component can enter the interior of the cylindrical part 4 through this side opening 6 to abut the top of the striker 10.

[0105] The nozzle 8 provided in this embodiment is located at the liquid storage channel 20. To protect the part of the nozzle 8 that extends out of the liquid box 21, a nut 9 can be screwed onto the liquid box 21. The nut 9 has a hole and will not obstruct the liquid from spraying out. It should be noted that the nut 9 is provided here to protect the nozzle 8, so that even if the nut 9 is loosened, the nozzle 8 will not loosen.

[0106] like Figure 5 , Figure 6 and Figure 7 As a preferred embodiment provided in this embodiment, the piezoelectric assembly includes a piezoelectric element 24, a stroke amplification assembly 25, a limiting mechanism 26, and a spring assembly.

[0107] The piezoelectric element 24 is used to apply voltage to extend its length. After the piezoelectric element 24 is extended, one end touches the stroke amplification component 25, so the stroke amplification component 25 is used to trigger the striker 10. The limiting mechanism 26 abuts against the other end of the piezoelectric element 24. The spring assembly includes a spring seat 28 and a third spring 27 disposed in the spring seat 28. The third spring 27 is used to push the stroke amplification component 25 to reset.

[0108] Specifically, when voltage is applied to the piezoelectric element 24, its length elongates. Since one end abuts against the limiting mechanism 26, the elongation of the other end will trigger the stroke amplification component 25. The stroke amplification component 25 will trigger the striker 10, that is, strike the striker 10, causing the striker 10 to strike the nozzle 8.

[0109] The stroke amplification assembly 25 includes a stroke amplification board and a positioning pin. One end of the stroke amplification board abuts against the positioning pin. When triggered by the piezoelectric element 24, the stroke amplification board will swing around the positioning pin, while the other end of the stroke amplification board will have a large swing amplitude, thereby triggering the striker 10.

[0110] like Figure 6 Since the stroke amplification component 25 needs to return to its original position after being triggered, this embodiment also provides a spring assembly, which includes a spring seat 28 and a third spring 27 disposed in the spring seat 28. The third spring 27 is used to push the stroke amplification component 25 back to its original position.

[0111] The spring seat 28 can be fixedly installed inside the valve body 34, thereby enabling the third spring 27 to push the stroke amplification component 25.

[0112] Alternatively, the spring seat 28 can be configured such that, when the adjusting body 3 adopts the form of the cylindrical portion 4 provided in the above embodiment, the spring seat 28 can be disposed inside the cylindrical portion 4, and the firing pin guide sleeve 22 can pass through the spring seat 28. The spring seat 28 can also move with the movement of the adjusting body 3.

[0113] like Figure 6 Alternatively, when the cylindrical portion 4 provided in the above embodiment has a side opening 6 and is equipped with a limiting rod 5, a hanging eave 29 can also be provided on the spring seat 28. The hanging eave 29 can pass through the side opening 6 and be hung on the upper surface of the two lower limiting rods 5. The two lower limiting rods 5 limit the cylindrical portion 4 through the lower surface, without affecting the use of the limiting rods 5. At this time, the spring seat 28 can move upward with the adjusting body 3, but when the adjusting body 3 moves downward, the hanging eave 29 can be hung on the upper surface of the limiting rods 5, and the spring seat 28 will not continue to move downward with the adjusting body 3. At this time, the third spring 27 and the second spring 23 can be coaxially arranged. The second spring 23 is used to push the impact pin 10, and the third spring 27 is used to push the stroke amplification assembly 25.

[0114] In this embodiment, the limiting mechanism 26 can be a limiting seat with a circular surface, which is used to abut against the piezoelectric element 24 to prevent the piezoelectric element 24 from elongating at this end.

[0115] The beneficial effect of this embodiment is that it provides a specific structure of the piezoelectric component and its assembly relationship with other structures, enabling it to cooperate well with other structures to complete the operation.

[0116] like Figure 4 This embodiment also provides that the piezoelectric injection valve 1 further includes a control component 32, which is used to acquire the operating temperature and operating status of the piezoelectric element 24 and control the operation of the piezoelectric element 24.

[0117] The above description is merely a preferred embodiment of this application and is not intended to limit this application. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this application should be included within the protection scope of this application.

Claims

1. A nozzle adjusting assembly for mounting on a piezoelectric injection valve, characterized in that, include: An adjusting rod, wherein the adjusting rod is used to rotate about its own axis while the position of the adjusting rod in its own length direction remains unchanged; as well as An adjusting body is connected to the adjusting rod by a thread. The adjusting body moves along the length of the adjusting rod by rotating the adjusting rod. The adjusting body is used to drive the nozzle of the piezoelectric injection valve to move along the length of the adjusting rod to adjust the distance between the nozzle and the striking pin of the piezoelectric injection valve. The rotating operating end of the adjusting rod and the nozzle are respectively located at opposite ends of the piezoelectric injection valve. A screw sleeve is provided on the adjusting rod. The screw sleeve has an external thread and is rotatably limited relative to the adjusting rod. The adjusting body has an internal thread portion that matches the external thread. The screw sleeve is threadedly assembled in the internal thread portion. The position of the screw sleeve in the length direction of the adjusting rod is adjustable. A threaded nut is also fitted onto the adjusting rod; A guide groove is provided on the adjusting rod, which is opened along the length direction of the adjusting rod. A receiving groove is provided on the inner wall of the screw sleeve, which is opposite to and connected to the guide groove. The guide groove and the receiving groove together accommodate a guide ball. Under the push of the nut, the guide ball can move in the guide groove, so as to realize the movement of the screw sleeve along the length direction of the adjusting rod and realize the adjustment of the positioning position. The threaded sleeve has an annular structure, and the receiving groove is located at the hole wall of the threaded sleeve. The inner surface of the receiving groove is a hemispherical hole or multiple hemispherical holes. When the guide bead is placed in the receiving groove, the guide bead is partially exposed from inside the receiving groove, and the exposed part is located inside the guide groove.

2. The nozzle adjusting assembly as described in claim 1, characterized in that, The nut is used to abut one end of the threaded sleeve. The nozzle adjustment assembly also includes a first spring, which is pressed between the valve body and the adjustment body of the piezoelectric injection valve. The first spring pushes the adjustment body to make the threaded sleeve fit tightly against the nut.

3. The nozzle adjusting assembly as described in claim 1 or 2, characterized in that, The nozzle adjustment assembly also includes a guide rod, which is fixedly connected to the adjustment body. The length direction of the guide rod is parallel to the length direction of the adjustment rod. The valve body of the piezoelectric injection valve is provided with a guide hole that matches the guide rod.

4. The nozzle adjusting assembly as described in claim 3, characterized in that, The regulating body includes: The nozzle adjusting assembly includes a cylindrical portion with a side opening, and a limiting rod fixedly disposed relative to the cylindrical portion. The limiting rod abuts against two opposing edges of the side opening along the length of the cylindrical portion to limit the extreme positions of the adjusting body's movement along the length of the adjusting rod. An extension portion extends in a direction perpendicular to the axis of the cylindrical portion, and a guide rod is disposed on the extension portion.

5. A piezoelectric injection valve, characterized in that, The nozzle adjustment assembly as described in any one of claims 1-4 is installed.

6. The piezoelectric injection valve as described in claim 5, characterized in that, The piezoelectric injection valve includes a valve body, a flow channel assembly, and components installed within the valve body: The firing pin assembly includes a firing pin for striking a nozzle; and A piezoelectric assembly is used to trigger the striking pin to strike the nozzle, and a flow channel assembly is used for liquid supply; The flow channel assembly includes a liquid box, which has a connected liquid supply channel and a liquid storage channel. The nozzle is located in the liquid storage channel, and the lower end of the striker is located inside the liquid storage channel. The liquid box is fixedly connected to the adjusting body.

7. The piezoelectric injection valve as described in claim 6, characterized in that, The firing pin assembly also includes: A firing pin guide sleeve, wherein the firing pin passes through the firing pin guide sleeve, and the firing pin guide sleeve is partially located within the liquid storage channel and partially located within the regulating body; and The second spring is sleeved on the striker guide sleeve and is used to push the upper end of the striker against the trigger part of the piezoelectric assembly.

8. The piezoelectric injection valve as described in claim 6 or 7, characterized in that, The piezoelectric component includes: A piezoelectric element, wherein a voltage is applied to the piezoelectric element to elongate its length; The stroke amplification assembly is used to trigger the striker when one end of the piezoelectric element extends. A limiting mechanism, the limiting mechanism abutting against the other end of the piezoelectric element; and A spring assembly, comprising a spring seat and a third spring disposed within the spring seat, the third spring being used to push the stroke amplification component to reset.

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