Flexible hinge type piezoelectric screw

Abstract

The invention provides a flexible hinge type piezoelectric screw, and relates to the field of piezoelectric screws, the flexible hinge type piezoelectric screw comprises a flexible driving hinge, the flexible driving hinge is provided with a first through hole, the first through hole is provided with an internal thread, and the wall surface of the first through hole is provided with a split groove; the two split grooves penetrate through the flexible driving hinge in the thickness direction of the flexible driving hinge and divide the first through hole into two half holes, the flexible driving hinge is further provided with a hollow structure, and piezoelectric ceramics are arranged in the hollow structure; the base is used for installing the flexible driving hinge, and a second through hole is formed in the base; the regulator sequentially penetrates through the first through hole and the second through hole and is in threaded connection with the internal thread; after the piezoelectric ceramic receives the signal, the length of the piezoelectric ceramic is changed in the length direction of the piezoelectric ceramic, and the wall surfaces forming the two half holes are pushed to rotate in the same direction so as to drive the adjuster to ascend and descend, and feeding or retreating of the adjuster is achieved.

Description

Technical Field

[0001] The present invention relates to the field of piezoelectric screws, and in particular to a flexible hinge type piezoelectric screw. Background Art

[0002] The core principle of the piezoelectric screw cleverly combines the piezoelectric effect with mechanical drive technology, showing technical advantages such as high precision, fast response and compact structure. Its working mechanism is that when voltage is applied, the piezoelectric ceramic (13) deforms, and the tiny displacement is amplified into linear or rotational motion through the precision thread structure. By utilizing the alternating movement of rapid expansion (viscous phase) and slow contraction (slip phase) of the piezoelectric ceramic, continuous and precise motion (such as rotation or linear displacement) is achieved through the difference in friction force. With its excellent positioning accuracy, excellent stability and good electrical control characteristics, piezoelectric screws are widely used in precision engineering fields such as laser optical path adjustment, microscopic observation systems, telescope lens angle fine-tuning and optical path alignment in optical fiber communication. Although most existing piezoelectric screws show reliable stability and high positioning accuracy, they are limited by the single flexible hinge structure design, and their step speed and step length are significantly restricted.

[0003] Most piezoelectric screws suffer from issues such as slow response speed, limited service life, insufficient anti-interference capabilities, low drive efficiency, and stringent controller requirements. Due to the compact design of piezoelectric screws, the output displacement of the piezoelectric ceramics they are equipped with is extremely limited. During precision adjustments such as laser optical path adjustment and microscope calibration, the angle adjustment process is significantly time-consuming, resulting in low overall work efficiency. Forcibly increasing the stepping speed will place extremely high demands on the drive controller. Furthermore, improper preload mechanism design will accelerate the wear of the piezoelectric screw thread pair, making it difficult to maintain stable repeatable positioning accuracy. Summary of the Invention

[0004] The present invention provides a flexible hinge type piezoelectric screw, which aims to solve the problems of limited piezoelectric ceramic output displacement and long adjustment time of existing piezoelectric screws.

[0005] In order to achieve the above-mentioned object, an embodiment of the present invention provides a flexible hinge type piezoelectric screw, comprising:

[0006] A flexible drive hinge, wherein the flexible drive hinge is provided with a first through hole, the first through hole having an internal thread, a splitting groove is provided on the wall surface of the first through hole, two splitting grooves penetrate the flexible drive hinge along the thickness direction of the flexible drive hinge and the two splitting grooves divide the first through hole into two half holes, and the flexible drive hinge is further provided with a hollow structure, wherein a piezoelectric ceramic is disposed within the hollow structure;

[0007] A base, used for mounting the flexible drive hinge, wherein the base is provided with a second through hole coaxial with the first through hole;

[0008] A regulator is sequentially provided through the first through hole and the second through hole and is screwed to the internal thread;

[0009] After receiving the signal, the piezoelectric ceramic changes its length along its own length direction, and pushes the walls forming the two half holes to rotate in the same direction, thereby driving the regulator to move up and down.

[0010] Preferably, the flexible hinge type piezoelectric screw further comprises an elastic member, and the elastic member pushes the wall of the half hole to closely fit with the side surface of the regulator.

[0011] Preferably, the base and the flexible drive hinge have the same shape, both being rectangular;

[0012] The first through hole and the second through hole are respectively opened at the center of the flexible driving hinge and the base, and the two split grooves are centrally symmetrically arranged about the first through hole;

[0013] The hollow structure includes a length slot and a width slot, wherein the length direction of the length slot is consistent with the length direction of the flexible drive hinge, and the width slot is perpendicular to the length direction of the flexible drive hinge. The splitting slot, the length slot, and the width slot are sequentially connected; the two hollow structures are centrally symmetrical about the first central through hole;

[0014] The piezoelectric ceramic is arranged in the length slot. The expansion and contraction direction of the piezoelectric ceramic is consistent with the length direction of the flexible drive hinge, and the piezoelectric ceramic is fixedly connected to the wall surface forming the length slot.

[0015] Preferably, the elastic member is a special-shaped spring, which includes two ends and a connecting portion connecting the two ends. The two ends are fixed on both sides of the width of the flexible drive hinge, and the connecting portion is at a right angle. The connecting portion provides a pre-tightening force for the walls of the half holes to approach each other.

[0016] Preferably, the base and the flexible drive hinge have the same shape, both being right-angled;

[0017] The first through hole and the second through hole are respectively opened at right angles between the flexible driving hinge and the base, and the angle between the two split grooves is 90°;

[0018] The hollow structure includes a length slot and a width slot, the direction of the length slot is consistent with the length direction of the flexible drive hinge, and the width slot is perpendicular to the length direction of the flexible drive hinge. The splitting slot, the length slot and the width slot are connected in sequence, and the angle between the two hollow structures is 90°;

[0019] The piezoelectric ceramic is arranged in the length slot. The expansion and contraction direction of the piezoelectric ceramic is consistent with the length direction of the flexible drive hinge, and the piezoelectric ceramic is fixedly connected to the wall surface forming the length slot.

[0020] Preferably, the elastic member is a special-shaped spring, which includes two ends and a connecting portion connecting the two ends. The two ends are fixed at right angles to the flexible drive hinge, and the connecting portion is right-angled. The connecting portion provides a pre-tightening force for the walls of the half holes to approach each other.

[0021] Preferably, the flexible hinge type piezoelectric screw also includes a fixing part, which is arranged at the corner of the flexible driving hinge close to the piezoelectric ceramic. The flexible driving hinge is connected to the base through the fixing part, and the corner where the fixing part is provided can be rotated relative to the base with the fixing part as the axis.

[0022] Preferably, the flexible hinge type piezoelectric screw further comprises a protective cover, wherein the protective cover is arranged above the base, and the flexible driving hinge cover is arranged between the protective cover and the base;

[0023] The upper end of the regulator is passed through the outside of the protective cover and is provided with a knob.

[0024] Preferably, the flexible hinge type piezoelectric screw is further provided with a threaded bushing, the threaded bushing is located below the base, and the threaded bushing is used to connect to a slide or an optical adjustment frame.

[0025] The above solution of the present invention has the following beneficial effects:

[0026] In the present application, a first through hole is opened on the flexible driving hinge for the regulator to pass through, and a splitting groove divides the first through hole into two half holes. The change in the length of the piezoelectric ceramic is used to drive the flexible driving hinge to form the wall of the half hole to rotate in the same direction (clockwise or counterclockwise), thereby driving the regulator to advance or retreat.

[0027] This application can not only perform coarse adjustment of large steps by rotating the regulator, but also achieve fine adjustment of small steps by expanding and contracting the piezoelectric ceramic, better adapting to the adjustment of step length in different environments, converting the displacement of the piezoelectric ceramic into the rotational motion of the regulator, and realizing rapid feeding and retreating.

[0028] In addition, an elastic part is provided outside the regulator, which provides pre-tightening force to the flexible drive hinge to ensure that the wall of the half hole is in full contact with the regulator, thereby improving the service life, repeat positioning accuracy and stability of the application.

[0029] Finally, the flexible drive hinge and base in this application have various structural forms, which can be right-angled, rectangular, etc., and can be customized according to different usage environments and needs.

[0030] Other features and advantages of the present invention will be described in detail in the following detailed description. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] Figure 1 is a schematic diagram of Example 1;

[0032] Figure 2 is a three-dimensional diagram of the flexible drive hinge and base of Example 1;

[0033] Figure 3 is a top view of the flexible drive hinge and base of Example 1;

[0034] Figure 4 is a simulation diagram of the flexible drive hinge of Example 1;

[0035] Figure 5 is a schematic diagram of Example 2;

[0036] Figure 6 is a three-dimensional diagram of the flexible drive hinge and base of Example 2;

[0037] Figure 7 is a top view of the flexible drive hinge and base of Example 2;

[0038] Figure 8 is a simulation diagram of the flexible drive hinge of Example 2;

[0039] Figure 9 is a schematic diagram of the elastic member in this application;

[0040] Figure 10 It is a schematic diagram of the voltage signal when the regulator is fed;

[0041] Figure 11 It is a schematic diagram of the voltage signal when the regulator is backed off.

[0042] [Description of Reference Numerals]

[0043] 10-Flexible drive hinge, 11-First through hole, 11a-Half hole, 12-Split groove, 13-Piezoelectric ceramic, 14-Length groove, 14a-Upper half, 14b-Lower half, 15-Width groove, 15a-Left half, 15b-Right half, 16-Card slot

[0044] 20-base, 22-outlet plug,

[0045] 30-Regulator,

[0046] 40-elastic part, 41-end part, 42-connecting part,

[0047] 50-fixing parts,

[0048] 60-Protective cover,

[0049] 70-knob,

[0050] 80-thread bushing. DETAILED DESCRIPTION

[0051] In order to make the technical problems, technical solutions and advantages to be solved by the present invention clearer, a detailed description will be given below with reference to the accompanying drawings and specific embodiments.

[0052] An embodiment of the present invention provides a flexible hinge type piezoelectric screw, comprising a flexible drive hinge 10, a base 20 and an adjuster 30, wherein a first through hole 11 is provided on the flexible drive hinge 10, the first through hole 11 having an internal thread, and a split groove 12 is provided on the wall surface surrounding the first through hole 11, and two split grooves 12 are provided, the two split grooves 12 pass through the flexible drive hinge 10 along the thickness direction of the flexible drive hinge 10, and the two split grooves 12 divide the first through hole 11 into two half holes 11a in the horizontal direction, and a hollow structure is also provided on the flexible drive hinge 10, in which a piezoelectric ceramic 13 is provided. The aforementioned flexible drive hinge 10 is provided on the base 20, which is also provided with a hole, which is a second through hole. When the flexible drive hinge 10 is assembled on the base 20, the second through hole is coaxial with the first through hole 11. The aforementioned adjuster 30 has an external thread, and the adjuster 30 is sequentially inserted into the first through hole 11 and the second through hole, while the external thread of the adjuster 30 is threadedly connected to the internal thread of the first through hole 11 .

[0053] When the piezoelectric ceramic 13 receives a signal, it can be excited by the signal and change its length along its own length direction, thereby pushing the walls of the two half holes 11a to rotate in the same direction (clockwise or counterclockwise). The walls of the two half holes 11a convert the displacement output by the piezoelectric ceramic 13 into an offset rotation of the first through hole 11, driving the regulator 30 screwed to the first through hole 11 to rotate. The feed or retraction of the regulator 30 is achieved by controlling the rotation direction of the walls of the two half holes 11a.

[0054] In the present application, the flexible driving hinge 10 and the piezoelectric ceramic 13 are used in combination to maximize the output displacement, thereby increasing the rotation speed and the feed speed.

[0055] Furthermore, the present application also includes an elastic member 40, which pushes the wall of the half hole 11a to fit tightly with the side of the regulator 30, thereby ensuring that the wall of the half hole 11a and the regulator 30 are in close contact within the envelope angle of the wall of the half hole 11a, thereby ensuring that the threads (internal and external threads) of the regulator 30 and the walls of the two half holes 11a cooperate to generate static friction, thereby avoiding the wall of the half hole 11a from slipping when driving the regulator 30. At the same time, the service life, repeatability and stability of the present application can be improved by providing the elastic member 40. If the elastic member 40 is not provided, when the regulator 30 is transmitted with the walls of the two half holes 11a, thread slippage is likely to occur, and the self-locking effect is poor. When working for a long time, the repeatability is low.

[0056] This application provides two flexible hinged piezoelectric screws with different shapes.

[0057] Example 1:

[0058] Reference Figures 1-4 、 Figure 9 In the embodiment, the base 20 and the flexible driving hinge 10 have the same shape, both of which are rectangular.

[0059] On the flexible driven hinge 10, the first through hole 11 is arranged at the center of the flexible driven hinge 10, that is, at the geometric center of the flexible driven hinge 10. The first through hole 11 penetrates the flexible driven hinge 10 along the thickness of the flexible driven hinge 10. It can be understood that the second through hole is arranged at the center of the base 20.

[0060] The two splitting grooves 12 mentioned above are respectively arranged on the flexible driving hinge 10, and the splitting grooves 12 pass through the flexible driving hinge 10 along the flexible driving hinge 10. The two splitting grooves 12 are arranged in a centrally symmetrical manner about the circle of the first through hole 11, so that the two splitting grooves 12 divide the first through hole 11 into two half holes 11a with the same central angle.

[0061] The aforementioned hollow structure includes a length slot 14 and a width slot 15. Both the length slot 14 and the width slot 15 extend through the flexible drive hinge 10 along its thickness. The flexible drive hinge 10 has a length direction and a width direction. The length direction of the length slot 14 coincides with the length direction of the flexible drive hinge 10. The width slot 15 is perpendicular to the length direction of the flexible drive hinge 10, that is, the length direction of the width slot 15 coincides with the width direction of the flexible drive hinge 10. The splitting slot 12, the length slot 14, and the width slot 15 are sequentially connected end to end.

[0062] In this embodiment, two hollow structures are provided, and the two hollow structures are arranged in a centrally symmetrical manner with respect to the first through hole 11 .

[0063] The aforementioned piezoelectric ceramic 13 is positioned within the longitudinal slot 14, with the expansion and contraction direction of the piezoelectric ceramic 13 aligned with the longitudinal direction of the flexible drive hinge 10. Both ends of the piezoelectric ceramic 13 are fixedly connected to the walls forming the longitudinal slot 14. The expansion and contraction directions of the piezoelectric ceramics 13 within the two hollow structures are parallel to each other along the width direction of the flexible drive hinge 10.

[0064] Please continue to refer to Figure 3 In this embodiment, one end of the splitting slot 12 is connected to the first through-hole 11, and the other end is connected to the length slot 14. The length slot 14 divides the flexible drive hinge 10 into an upper half 14a and a lower half 14b. The length slot 14 is also connected to the width slot 15. The width slot 15 divides the flexible drive hinge 10 into a left half 15a and a right half 15b on one side of the first through-hole 11.

[0065] The present application also includes a fixing part 50, wherein the fixing part 50 is arranged at the corner of the flexible drive hinge 10 close to the piezoelectric ceramic 13, the flexible drive hinge 10 is connected to the base 20 through the fixing part 50, and the corner provided with the fixing part 50 can be rotated relative to the base 20 with the fixing part 50 as the axis.

[0066] It can be understood that in this embodiment, two fixing members 50 are provided, which are respectively located at the corners where the piezoelectric ceramics 13 are provided on both sides of the first through hole 11, such as Figure 3 As shown, the two fixing members 50 are located on the same diagonal line of the flexible drive hinge 10 .

[0067] When the piezoelectric ceramic 13 is excited by a signal, the length of the piezoelectric ceramic 13 will change. When the polarity of the voltage applied to the piezoelectric ceramic 13 is consistent with the polarization direction of the piezoelectric ceramic 13, the piezoelectric ceramic 13 will stretch along the polarization direction; when the polarity of the voltage applied to the piezoelectric ceramic 13 is opposite to the polarization direction of the piezoelectric ceramic 13, the piezoelectric ceramic 13 will shorten along the polarization direction. Figure 3 As shown, the extension of the piezoelectric ceramic 13 in the lower half 14b of the flexible drive hinge 10 is used as an example for explanation. As the piezoelectric ceramic 13 extends, the two ends of the piezoelectric ceramic 13 contact the wall surface forming the length groove 14 and exert a force on the wall surfaces at both ends of the length groove 14 (hereinafter referred to as the left wall surface and the right wall surface). Since the right corner of the two corners in the length direction of the flexible drive hinge 10 (hereinafter referred to as the left corner and the right corner) is connected to the base 20 through the fixing member 50, the piezoelectric ceramic 13 pushes the left wall surface of the lower half 14b of the flexible drive hinge 10 to move to the left during the extension process. During the displacement process, due to the existence of the width groove 15, the left half 15a and the right half 15b approach each other. At this time, the wall surface forming the half hole 11a rotates due to the displacement of the piezoelectric ceramic 13, and the wall surface of the half hole 11a rotates clockwise, completing the feeding of the regulator 30.

[0068] It can be understood that when the piezoelectric ceramic 13 located in the upper half 14a of the flexible drive hinge 10 is also applied with a signal with the same voltage polarity, the piezoelectric ceramic 13 in the upper half 14a is also extended, pushing the upper half 14a to move to the right. Under the displacement of the upper half 14a and the lower half 14b in opposite directions, the high static friction between the wall of the half hole 11a and the regulator 30 is driven to rotate through the high static friction between the threads.

[0069] It can be understood that when the piezoelectric ceramic 13 of the upper half 14a of the flexible drive hinge 10 and the piezoelectric ceramic 13 of the lower half 14b receive a length shortening signal, the lower half 14b of the flexible drive hinge 10 will displace to the right, and the upper half 14a will displace to the left, and the wall of the half hole 11a will rotate counterclockwise to complete the retraction of the adjuster 30.

[0070] Preferably, the length groove 14 and the width groove 15 form a smooth transition at the connection point.

[0071] To ensure that the wall forming the half hole 11a maintains contact with the envelope angle of the regulator 30 on the wall of the half hole 11a, an elastic member 40 is further provided on the flexible drive hinge 10. The elastic member 40 is a special-shaped spring having two ends 41 and a connecting portion 42 connecting the two ends 41, and the connecting portion 42 is at a right angle.

[0072] In this embodiment, slots 16 are respectively provided in the width direction of the flexible drive hinge 10, and the two end portions 41 are respectively fixed in the slots 16, and under the action of the connecting portion 42, the two end portions 41 have a tendency to approach each other, so that the two walls forming the half holes 11a have a tendency to approach each other, ensuring that the adjuster 30 is fully in contact within the envelope angle of the wall forming the half hole 11a.

[0073] Example 2:

[0074] Refer to the figure Figure 5-Figure 9 In the embodiment, the base 20 and the flexible driving hinge 10 have the same shape, both of which are right-angled.

[0075] The first through hole 11 is provided at a right angle to the flexible drive hinge 10 , and the second through hole is provided at a right angle to the base 20 .

[0076] The aforementioned split grooves 12 are respectively provided on the flexible drive hinge 10, and the length directions of the two split grooves 12 are perpendicular to each other. The two split grooves 12 pass through the flexible drive hinge 10, and the two split grooves 12 divide the first through hole 11 into two half holes 11a with the same central angle.

[0077] The aforementioned hollow structure includes a length slot 14 and a width slot 15. Both the length slot 14 and the width slot 15 extend through the flexible drive hinge 10 along its thickness. The flexible drive hinge 10 has a length direction and a width direction. The length direction of the length slot 14 coincides with the length direction of the flexible drive hinge 10, while the width slot 15 is perpendicular to the length direction of the flexible drive hinge 10, meaning that the length direction of the width slot 15 coincides with the width direction of the flexible drive hinge 10. The splitting slot 12, the length slot 14, and the width slot 15 are sequentially connected end to end.

[0078] In this embodiment, two hollow structures are provided, and the included angle between the two hollow structures is 90°.

[0079] The aforementioned piezoelectric ceramic 13 is arranged in the length slot 14 . The expansion and contraction direction of the piezoelectric ceramic 13 is consistent with the length direction of the flexible drive hinge 10 , and both ends of the piezoelectric ceramic 13 are fixedly connected to the wall surface forming the length slot 14 .

[0080] Please continue to refer to Figure 7 In this embodiment, the flexible hinge type piezoelectric screw also includes a fixing part 50, which is respectively arranged at the corners of the flexible driving hinge 10 close to the piezoelectric ceramic 13. The flexible driving hinge 10 is connected to the base 20 through the fixing part 50, and the corners provided with the fixing part 50 can be rotated relative to the base 20 with the fixing part 50 as the axis.

[0081] In this embodiment, one fixing member 50 is disposed at the lower left corner of the flexible driving hinge 10 , and the other fixing member 50 is disposed at the upper right corner of the flexible driving hinge 10 .

[0082] To ensure that the wall forming the half hole 11a and the regulator 30 maintain contact within the envelope angle of the half hole 11a wall, an elastic member 40 is further provided on the flexible drive hinge 10. The elastic member 40 is a special-shaped spring having two ends 41 and a connecting portion 42 connecting the two ends 41, and the connecting portion 42 is at a right angle.

[0083] In this embodiment, slots 16 are respectively provided at right angles of the flexible drive hinge 10, and the two end portions 41 are respectively fixed in the slots 16, and under the action of the connecting portion 42, the two end portions 41 tend to approach each other, so that the two walls forming the half holes 11a tend to approach each other, ensuring that the regulator 30 is fully in contact within the envelope angle of the wall forming the half hole 11a.

[0084] The principles of this embodiment are the same as those of embodiment 1, and will not be elaborated here.

[0085] Example 3:

[0086] Based on Example 2, the shapes of the base 20 and the flexible drive hinge 10 can also be acute angles (such as 30°, 45°, 60°, etc.) or obtuse angles (such as 120°, 150°). The principle is the same as that of Example 2, so I will not go into details here.

[0087] Preferably, in the present application, the flexible hinge type piezoelectric screw further includes a protective cover 60, which is disposed above the base 20. The protective cover 60 covers the flexible drive hinge 10 between the protective cover 60 and the base 20 to protect the flexible drive hinge 10. The upper end of the aforementioned adjuster 30 passes through the protective cover 60 and is provided with a knob 70.

[0088] Preferably, a sealant is applied between the protective cover 60 and the base 20. A wire outlet plug 22 with a wire outlet hole is provided on the base 20 for leading out the cables of the piezoelectric ceramic 13.

[0089] The signal referred to in this application is a voltage signal, which controls the change in the length of the piezoelectric ceramic 13 through the cable of the piezoelectric ceramic 13. The voltage signal is different when the regulator 30 advances or retracts.

[0090] refer to Figure 10 When the voltage signal is used to feed the regulator 30, a slowly rising electrical signal is applied to the piezoelectric ceramic 13 (T1 stage) so that the regulator 30 and the external thread of the first through hole 11 cooperate to generate high static friction. This slow sliding causes the regulator 30 to rotate and feed, and because of the existence of high static friction, the external thread and the internal thread of the regulator 30 achieve a self-locking effect. When the step is completed, a rapidly falling electrical signal is applied (T2 stage). Due to the existence of inertia and low dynamic friction, the screw will remain in the current position unchanged. In a cycle T1+T2, T1 is the time required for the voltage to rise from the initial voltage value to the preset voltage, and T2 is the time required for the preset voltage to drop to the initial voltage value. When the regulator 30 is fed, T1>T2

[0091] refer to Figure 11 When the voltage signal is used to retract the regulator 30, the retraction of the regulator 30 can be achieved by applying a rapidly rising electrical signal to the piezoelectric ceramic 13 (T1 stage) and applying a rapidly falling electrical signal when the retraction ends (T2 stage). In a cycle T1+T2, T1 is the time required for the voltage to rise from the initial voltage value to the preset voltage, and T2 is the time required for the preset voltage to fall to the initial voltage value. When the regulator 30 retracts, T1>T2.

[0092] The above is a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principles of the present invention. These improvements and modifications should also be regarded as within the scope of protection of the present invention.

Claims

1. A flexible hinge piezoelectric screw, characterized in that: include: A flexible drive hinge (10), wherein a first through hole (11) is provided on the flexible drive hinge (10), the first through hole (11) has an internal thread, a splitting groove (12) is provided on the wall surface of the first through hole (11), two of the splitting grooves (12) penetrate the flexible drive hinge (10) along the thickness direction of the flexible drive hinge (10), and the two splitting grooves (12) divide the first through hole (11) into two half holes (11a), and the flexible drive hinge (10) is also provided with a hollow structure, and a piezoelectric ceramic (13) is arranged in the hollow structure; A base (20) for mounting the flexible drive hinge (10), wherein the base (20) is provided with a second through hole coaxial with the first through hole (11); A regulator (30) is sequentially inserted into the first through hole (11) and the second through hole and is screwed to the internal thread; After receiving the signal, the piezoelectric ceramic (13) changes its length along its own length direction and pushes the wall surfaces forming the two half holes (11a) to rotate in the same direction, thereby driving the regulator (30) to move up and down.

2. The flexible hinge type piezoelectric screw according to claim 1, characterized in that: The flexible hinge type piezoelectric screw further comprises an elastic member (40), wherein the elastic member (40) pushes the wall of the half hole (11a) to closely fit with the side surface of the regulator (30).

3. The flexible hinged piezoelectric screw according to claim 2, characterized in that: The base (20) and the flexible drive hinge (10) have the same shape, both being rectangular; The first through hole (11) and the second through hole are respectively opened at the center of the flexible drive hinge (10) and the base (20), and the two split grooves (12) are centrally symmetrically arranged with respect to the first through hole (11); The hollow structure comprises a length slot (14) and a width slot (15), the length direction of the length slot (14) is consistent with the length direction of the flexible drive hinge (10), and the width slot (15) is perpendicular to the length direction of the flexible drive hinge (10), the splitting slot (12), the length slot and the width slot (15) are connected in sequence; the two hollow structures are centrally symmetrical about the first central through hole; The piezoelectric ceramic (13) is arranged in the length slot (14), the expansion and contraction direction of the piezoelectric ceramic (13) is consistent with the length direction of the flexible drive hinge (10), and is fixedly connected to the wall surface forming the length slot (14).

4. The flexible hinge piezoelectric screw according to claim 3, characterized in that: The elastic member (40) is a special-shaped spring, comprising two ends (41) and a connecting portion (42) connecting the two ends (41), the two ends (41) being fixed on both sides of the width of the flexible drive hinge (10), the connecting portion (42) being in a right-angle shape, and the connecting portion (42) providing a pre-tightening force for the walls of the half hole (11a) to approach each other.

5. The flexible hinged piezoelectric screw according to claim 2, characterized in that: The base (20) and the flexible drive hinge (10) have the same shape, both being right-angled; The first through hole (11) and the second through hole are respectively opened at right angles between the flexible drive hinge (10) and the base (20), and the included angle between the two split grooves (12) is 90°; The hollow structure comprises a length slot (14) and a width slot (15), the direction of the length slot (14) is consistent with the length direction of the flexible drive hinge (10), and the width slot (15) is perpendicular to the length direction of the flexible drive hinge (10), the splitting slot (12), the length slot and the width slot (15) are connected in sequence, and the angle between the two hollow structures is 90°; The piezoelectric ceramic (13) is arranged in the length slot (14), the expansion and contraction direction of the piezoelectric ceramic (13) is consistent with the length direction of the flexible drive hinge (10), and is fixedly connected to the wall surface forming the length slot (14).

6. The flexible hinged piezoelectric screw according to claim 5, characterized in that: The elastic member (40) is a special-shaped spring, comprising two ends (41) and a connecting portion (42) connecting the two ends (41), the two ends (41) being fixed at right angles to the flexible drive hinge (10), the connecting portion (42) being in a right-angled shape, and the connecting portion (42) providing a pre-tightening force for the walls of the half hole (11a) to approach each other.

7. The flexible hinge type piezoelectric screw according to any one of claims 1 to 6, characterized in that: The flexible hinge type piezoelectric screw also includes a fixing part (50), and the fixing part (50) is arranged at the corner of the flexible driving hinge (10) close to the piezoelectric ceramic (13). The flexible driving hinge (10) is connected to the base (20) through the fixing part (50), and the corner where the fixing part (50) is provided can rotate relative to the base (20) with the fixing part (50) as the axis.

8. The flexible hinged piezoelectric screw according to claim 1, characterized in that: The flexible hinge type piezoelectric screw further comprises a protective cover (60), wherein the protective cover (60) is arranged above the base (20), and the flexible driving hinge (10) is covered between the protective cover (60) and the base (20); The upper end of the regulator (30) is passed through the outside of the protective cover (60) and is provided with a knob (70).

9. The flexible hinged piezoelectric screw according to claim 1, characterized in that: A threaded bushing (80) is also provided on the flexible hinge type piezoelectric screw. The threaded bushing (80) is located below the base (20). The threaded bushing (80) is used to connect a slide or an optical adjustment frame.

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