A piezoelectric drive motor

Abstract

A piezoelectric drive motor comprises an upper sliding platform assembly, a drive stator assembly, and a lower fixed platform assembly. The drive stator assembly is mounted on the lower fixed platform assembly, the upper sliding platform assembly is slidably mounted on the lower fixed platform assembly, and the drive stator assembly drives the upper sliding platform assembly in linear motion. The present invention aims to provide a piezoelectric drive motor. Through the design of the platform structure, the piezoelectric ceramic sheet compresses the drive stator, thereby driving the deformation of the drive stator to produce an amplification mechanism. This allows the drive stator to frictionally couple with the friction grooves of the upper sliding platform to generate high-precision step-by-step linear displacement.

Description

Technical Field

[0001] The patent of this invention belongs to the field of piezoelectric motor technology, and more specifically relates to a linear piezoelectric drive motor. Background Art

[0002] Piezoelectric motors are a new type of motor that, compared to traditional electromagnetic motors, offer advantages such as low noise, high precision, and compact design. Piezoelectric materials convert electrical energy into mechanical energy through the inverse piezoelectric effect, making these piezoelectric motors typically characterized by high precision and high resolution. When an electric field is applied to a piezoelectric ceramic, it deforms, which can be converted into mechanical motion. This deformation is induced by applying an electrical signal of a specific frequency and voltage. This deformation is then converted into linear or rotational motion through interaction with other components, such as friction.

[0003] The linear piezoelectric drive motor combines the telescopic stroke of piezoelectric ceramics with a conversion structure to form a first drive mechanism that can move linearly. The quality of the design of the transmission components of the piezoelectric motor determines the motion accuracy of the linear piezoelectric drive motor. Therefore, the structural design of the piezoelectric drive motor is crucial. Summary of the Invention

[0004] The purpose of the present invention is to propose a piezoelectric drive motor. Through the designed platform structure, the piezoelectric ceramic sheet squeezes the drive stator, thereby driving the drive stator to produce deformation of the amplification mechanism, so that the drive stator and the friction groove of the upper sliding platform are frictionally coupled to each other to generate high-precision step linear displacement.

[0005] To achieve this object, the present invention adopts the following technical solutions:

[0006] A piezoelectric drive motor comprises an upper sliding platform assembly, a driving stator assembly and a lower fixed platform assembly, wherein the driving stator assembly is mounted on the lower fixed platform assembly, the upper sliding platform assembly is slidably mounted on the lower fixed platform assembly, and the driving stator assembly drives the upper sliding platform assembly to move linearly;

[0007] The upper sliding platform includes an upper base plate, an upper platform guide rail support frame, an upper platform outer guide rail, an upper platform pre-tightening baffle and an upper platform inner guide rail, two upper platform guide rail support frames are arranged opposite to each other on both sides of the bottom of the upper base plate, and the upper platform guide rail support frames are each installed with an upper platform outer guide rail with a rolling surface facing downward; the two upper platform pre-tightening baffles are installed between the two upper platform outer guide rails, and the two upper platform pre-tightening baffles are arranged at intervals; the upper platform pre-tightening baffle includes a horizontal mounting surface and a vertical friction surface, the horizontal mounting surface is installed with the bottom surface of the upper base plate, the two vertical friction surfaces are located in the middle of the upper base plate, and the space between the two vertical friction surfaces constitutes a friction groove; the lower ends of the vertical friction surfaces are each installed with an upper platform inner guide rail, the rolling surfaces of the two upper platform inner guide rails are arranged back to back, and the rolling surface of the upper platform inner guide rail faces outward;

[0008] The lower fixed platform assembly includes a lower base plate, a guide rail slider, a lower platform pre-tightening baffle, an inner guide rail of the lower platform, a lower platform guide rail support frame, an outer guide rail of the lower platform and a micrometer differential head; the middle part of the lower base plate is the mounting position of the drive stator assembly, and the mounting position is adapted to the position of the friction groove; the lower base plate is installed with a lower platform guide rail support frame at a position corresponding to the outer guide rail of the upper platform, and the upper end of the lower platform guide rail support frame is provided with a lower platform outer guide rail; the positions corresponding to the lower base plate and the upper platform pre-tightening baffle are both provided with guide rail sliders, and the two guide rail sliders are respectively installed with lower guide rails. The platform pre-tightening baffle, the sliding paths of the guide rail sliders on both sides of the installation position are between the two sides of the installation position and the corresponding outer guide rails respectively; the lower platform inner guide rail is installed at the position corresponding to the upper platform inner guide rail above the lower platform pre-tightening baffle, and the sliding surfaces of the lower platform inner guide rail are arranged relatively to each other, and the lower platform inner guide rail forms a sliding fit with the upper platform inner guide rail corresponding to the upper platform; the lower platform outer guide rail is installed with a micrometer differential head with a telescopic end facing the lower platform pre-tightening baffle, and the end of the lower platform pre-tightening baffle close to the lower platform outer guide rail is provided with a top block corresponding to the micrometer differential head;

[0009] A driving stator assembly is installed at the mounting position, and the driving stator forms friction with the friction groove after receiving voltage.

[0010] Wherein, the driving stator assembly includes a driving stator, a second piezoelectric ceramic and a first piezoelectric ceramic;

[0011] The driving stator includes a rebound mechanism, a second clamping mechanism, a first driving mechanism, and a first clamping mechanism;

[0012] The first clamping mechanism includes an amplifying structure, which includes two oppositely arranged first mounting seats and four connecting columns, and the two ends of the first piezoelectric ceramic abut against the two first mounting seats; two connecting columns are provided in the space between the front ends of the two first mounting seats, and the connecting columns are flush with the front ends of the first mounting seats, and the connecting columns are divided into a front mounting part and a rear mounting part by front and rear boundaries, the front end of the first mounting seat is connected to the front mounting part by a connecting section, and the two connecting columns are connected to the rear mounting part by a connecting section; two connecting columns are provided in the space between the lower ends of the two first mounting seats, the lower ends of the two first mounting seats are flush with the rear ends of the two connecting columns, the rear end of the first mounting seat is connected to the rear mounting part by a connecting section, and the two connecting columns at the lower ends of the two first mounting seats are connected to the front mounting part by a connecting section;

[0013] The first clamping mechanism also includes a claw structure, and two groups of left and right claw structures are installed on both sides of the amplifying structure, the claw structure on the left side includes a fixed block, a first lever block and a first friction block; the two fixed blocks are respectively installed at the front and rear positions of the left side of the amplifying structure, and the fixed block is fixedly installed at the mounting position, the front of the front first lever block is connected to the fixed block on the right side through a connecting section, the rear of the front first lever block is connected to the opposite surface of the front of the first mounting seat through a connecting section, the rear of the rear first lever block is connected to the fixed block on the right side through a connecting section, and the front of the rear first lever block is connected to the opposite surface of the rear of the first mounting seat through a connecting section; the left sides of the opposite ends of the front first lever block and the rear first lever block extend a connecting section to the left, and the two connecting sections are jointly connected to the front right side of the first friction block; the claw structure on the right side is consistent with the claw structure on the left side, and the claw structure on the right side is mirrored to the claw structure on the left side.

[0014] Wherein, a first driving mechanism is provided between the two connecting columns at the front of the amplifying structure;

[0015] The first driving mechanism includes a vertical section and a horizontal section, and the overall top view is "T" shaped. The rear end of the vertical section is connected to the center of the connecting section between the two connecting columns, and the vertical section is located between the fixed blocks at the front of the left and right sets of claw structures.

[0016] In addition, the rebound mechanism includes two second fixing seats and a second driving mechanism, the second driving mechanism is arranged opposite to the front of the first driving mechanism, the two second fixing seats are located on both sides of the second driving mechanism, the two second fixing seats are connected to both sides of the vertical section of the second driving mechanism through a connecting section, and the second fixing seats are fixedly installed in the installation position;

[0017] The second clamping mechanism includes two second mounting seats, the two second mounting seats are located between the first driving mechanism and the second driving mechanism, the two ends of the second piezoelectric ceramic abut against the two second mounting seats, and the second mounting seats are in the shape of strips arranged vertically in the front and back directions;

[0018] The second clamping mechanism further includes a second claw structure, wherein the two sets of second claw structures are arranged in an axisymmetric manner, and the second claw structure includes a second lever block and a second friction block;

[0019] The second lever block of the second claw structure on the left is arranged at the front, the front of the front second lever block is connected to the left end of the horizontal section of the second driving mechanism on the right through a connecting section, the rear of the front second lever block is connected to the opposite surface of the front of the second mounting seat through a connecting section, the rear of the rear second lever block is connected to the left end of the horizontal section of the rear first driving mechanism on the right through a connecting section, and the front of the rear second lever block is connected to the opposite surface of the rear of the second mounting seat on the right through a connecting section; the left sides of the opposite ends of the front second lever block and the rear second lever block extend a connecting section to the left, and the two connecting sections are jointly connected to the front right side of the second friction block.

[0020] One of the above technical solutions includes the following beneficial effects: two micrometer differential heads adjust the lower platform pre-tightening baffle so that the spacing between the two lower platform inner guide rails can be adjusted, so that the lower platform inner guide rail and the upper platform inner guide rail are in contact, and the overall mechanism formed by the upper platform pre-tightening baffle and the upper platform inner guide rail is pushed to contact the drive stator assembly, and finally the adjusted position of the upper platform pre-tightening baffle is tightened through the mounting slot at the bottom of the upper base plate, so that the drive stator can be pre-tightened, and this pre-tightening method ensures a good assembly relationship between the slide rail, the friction groove and the drive stator assembly, thereby ensuring the motion accuracy of the device. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0022] Figure 2 This is a schematic diagram of the explosion structure of the upper sliding platform of the present invention;

[0023] Figure 3 This is a schematic diagram of the explosion structure of the lower fixed platform of the present invention;

[0024] Figure 4 This is a schematic diagram of a top view of the overall structure of the present invention after the upper base plate is hidden;

[0025] Figure 5 is a schematic structural diagram of the drive stator of the present invention, wherein the component parts are marked;

[0026] Figure 6It is a schematic structural diagram of the driving stator of the present invention, with specific parts of the components marked.

[0027] Wherein: upper sliding platform assembly 1, upper base plate 101, upper platform guide rail support frame 102, upper platform outer guide rail 103, upper platform pre-tightening baffle 104, upper platform inner guide rail 105, driving stator assembly 2, driving stator 201, second piezoelectric ceramic 202-1, first piezoelectric ceramic 202-2, pre-tightening bolt 203, rebound mechanism 204, second fixing seat 204-1, second driving mechanism 204-2, second clamping mechanism 205, second mounting seat 205-1, second claw structure 205-2, second lever block 205-21 , the second friction block 205-22, the first driving mechanism 206, the first clamping mechanism 207, the amplifying structure 207-1, the first mounting seat 207-11, the connecting column 207-12, the claw structure 207-2, the fixed block 207-21, the first lever block 207-22, the first friction block 207-23, the lower fixed platform assembly 3, the lower base plate 301, the guide rail slider 302, the lower platform pre-tightening baffle 303, the lower platform inner guide rail 304, the lower platform guide rail support frame 305, the lower platform outer guide rail 306, and the micrometer differential head 307. DETAILED DESCRIPTION

[0028] The following describes embodiments of the present invention in detail. Examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended only to explain the present invention and are not to be construed as limiting the present invention.

[0029] like Figure 1 As shown, a piezoelectric drive motor includes an upper sliding platform component 1, a driving stator assembly 2 and a lower fixed platform component 3. The driving stator assembly 2 is mounted on the lower fixed platform component 3, and the upper sliding platform component 1 is slidably mounted on the lower fixed platform component 3. The driving stator assembly 2 drives the upper sliding platform component 1 to move linearly.

[0030] like Figure 2As shown, the upper sliding platform 1 includes an upper base plate 101, an upper platform guide rail support frame 102, an upper platform outer guide rail 103, an upper platform pre-tightening baffle 104 and an upper platform inner guide rail 105. Two upper platform guide rail support frames 102 are arranged on both sides of the bottom of the upper base plate 101. The upper platform guide rail support frames 102 are both installed with an upper platform outer guide rail 103 with a rolling surface facing downward; the two upper platform pre-tightening baffles 104 are installed between the two upper platform outer guide rails 103, and the two The upper platform pre-tightening baffles 104 are arranged at intervals; the upper platform pre-tightening baffles 104 include a horizontal mounting surface and a vertical friction surface, the horizontal mounting surface is mounted on the bottom surface of the upper base plate 101, the two vertical friction surfaces are located in the middle of the upper base plate 101, and the space between the two vertical friction surfaces constitutes a friction groove; the lower ends of the vertical friction surfaces are each mounted with an upper platform inner guide rail 105, the rolling surfaces of the two upper platform inner guide rails 105 are arranged back to back, and the rolling surface of the upper platform inner guide rail 105 faces outward;

[0031] like Figure 3 As shown, the lower fixed platform assembly 3 includes a lower base plate 301, a guide rail slider 302, a lower platform pre-tightening baffle 303, a lower platform inner guide rail 304, a lower platform guide rail support frame 305, a lower platform outer guide rail 306 and a micrometer differential head 307; the middle part of the lower base plate 301 is the mounting position for the drive stator assembly 2, and the mounting position is adapted to the position of the friction groove; the lower base plate 301 is installed with a lower platform guide rail support frame 305 at a position corresponding to the upper platform outer guide rail 103, and the upper end of the lower platform guide rail support frame 305 is provided with a lower platform outer guide rail 306; the lower base plate 301 is provided with a guide rail slider 302 at a position corresponding to the upper platform pre-tightening baffle 104, and the two guide rail sliders 302 The lower platform pre-tightening baffles 303 are respectively installed on the upper part, and the sliding paths of the guide rail sliders on both sides of the installation position are between the two sides of the installation position and the corresponding outer guide rails 306; the lower platform inner guide rail 304 is installed at the position corresponding to the lower platform pre-tightening baffle 303 and the upper upper platform inner guide rail 105, and the sliding surfaces of the lower platform inner guide rail 304 are arranged opposite to each other, and the lower platform inner guide rail 304 forms a sliding fit with the upper corresponding upper platform inner guide rail 105; the lower platform outer guide rail 306 is installed with a micrometer differential head 307 with the telescopic end facing the lower platform pre-tightening baffle 303, and the end of the lower platform pre-tightening baffle 303 close to the lower platform outer guide rail 306 is provided with a top block corresponding to the micrometer differential head 307;

[0032] The mounting position is provided with a driving stator assembly 2, and the driving stator forms friction with the friction groove after receiving voltage.

[0033] The upper sliding platform assembly 1 and the lower fixed platform assembly 3 are linear sliding assemblies. The driving stator assembly 2 is fixedly installed on the lower fixed platform 3. The driving stator assembly 2 creates and releases the friction between itself and the upper sliding platform assembly 1 through its own deformation, thereby driving the linear reciprocating motion of the upper sliding platform assembly 1. The upper sliding platform assembly of this scheme is provided with two sets of linear sliding rails, including the outer upper platform guide rail 103 and the lower platform outer guide rail 306 forming a linear sliding guide rail. In this set of guide rails, the sliding surfaces of the upper platform outer guide rail 103 and the lower platform outer guide rail 306 are arranged up and down, and the other set is a linear sliding guide rail composed of the upper platform inner guide rail 105 and the lower platform inner guide rail 304. The sliding surfaces of the platform inner guide rail 105 and the lower platform inner guide rail 304 are arranged left and right, that is, there is a sliding relationship in the up and down and left and right directions of the linear sliding direction, which has good guiding performance. In addition, two micrometer differential heads 307 are provided to adjust the lower platform pre-tightening baffle 303 so that the spacing between the two lower platform inner guide rails 304 can be adjusted, so that the lower platform inner guide rail 304 and the upper platform inner guide rail 105 contact each other, and push the upper platform pre-tightening baffle 104 and the upper platform inner guide rail 105 to form an overall mechanism to contact the driving stator assembly 2, such as Figure 2 As shown, finally, the adjusted position of the upper platform pre-tightening baffle 104 is tightened through the installation slot at the bottom of the upper base plate 101, so that the driving stator 201 can be pre-tightened. This pre-tightening method ensures a good assembly relationship between the slide rail, the friction groove and the driving stator assembly 2, thereby ensuring the movement accuracy of the device.

[0034] like Figure 4-5 As shown, the driving stator assembly 2 includes a driving stator 201, a second piezoelectric ceramic 202-1 and a first piezoelectric ceramic 202-2;

[0035] The driving stator 201 includes a rebound mechanism 204, a second clamping mechanism 205, a first driving mechanism 206, and a first clamping mechanism 207;

[0036] The first clamping mechanism 207 includes an amplifying structure 207-1, which includes two oppositely arranged first mounting seats 207-11 and four connecting pillars 207-12. The two ends of the first piezoelectric ceramic 202-2 are in contact with the two first mounting seats 207-11. Two connecting pillars 207-12 are provided in the space between the front ends of the two first mounting seats 207-11. The connecting pillars 207-12 are flush with the front ends of the first mounting seats. The connecting pillars 207-12 are divided into a front mounting portion and a rear mounting portion at the front and rear ends. The first mounting seat 207-11 The front end of 7-11 is connected to the front mounting portion via a connecting section, and the two connecting posts 207-12 are connected to the rear mounting portion via a connecting section. Two connecting posts 207-12 are provided in the space between the lower ends of the two first mounting seats 207-11. The lower ends of the two first mounting seats 207-11 are flush with the rear ends of the two connecting posts 207-12. The rear ends of the first mounting seats 207-11 are connected to the rear mounting portion via a connecting section, and the two connecting posts 207-12 at the lower ends of the two first mounting seats 207-11 are connected to the front mounting portion via a connecting section.

[0037] The first clamping mechanism 207 also includes a claw structure 207-2. The left and right claw structures are installed on both sides of the amplifying structure 207-1. The left claw structure 207-2 includes a fixed block 207-21, a first lever block 207-22 and a first friction block 207-23. The two fixed blocks 207-21 are respectively installed at the front and rear positions of the left side of the amplifying structure 207-1. The fixed block 207-21 is fixedly installed in the installation position. The front part of the front first lever block 207-22 is connected to the right fixed block 207-21 through a connecting section, and the rear part of the front first lever block 207-22 is connected to the first mounting seat 207-11 through a connecting section. The rear part of the rear first lever block 207-22 is connected to the rear fixed block 207-21 on the right through a connecting section, and the front part of the rear first lever block 207-22 is connected to the rear opposite surface of the first mounting seat 207-11 through a connecting section; the left sides of the opposite ends of the front first lever block 207-22 and the rear first lever block 207-22 extend a connecting section to the left, and the two connecting sections are jointly connected to the front right side of the first friction block 207-23; the claw structure 207-2 on the right is consistent with the claw structure 207-2 on the left, and the claw structure 207-2 on the right is mirror-imaged to the claw structure 207-2 on the left.

[0038] The rebound mechanism 204, the second clamping mechanism 205, the first driving mechanism 206 and the first clamping mechanism 207, assuming that the first clamping mechanism 207 is activated first, the amplifying structure 207-1 begins to deform first, and the first piezoelectric ceramic 202-2 in the amplifying structure 207-1 expands the distance between the two first mounting seats 207-11. The expansion of the two first mounting seats 207-11 will drive the first lever blocks 207-22 on both sides to rotate outward, and then the first friction blocks 207-23 installed on the outer parts of the two lever sections will extend outward, and the friction blocks 207-23 on both sides will extend to both sides. At this time, according to the extension amount given by the first piezoelectric ceramic 202-2, the friction blocks 207 on both sides will extend outward. -23 extends outwards by different strokes, and the force applied to the two side walls of the friction groove is different, which can be contact or tight; at the same time, the expansion of the distance between the two first mounting seats 207-11 will also drive the first driving mechanism 206 provided between the two connecting columns 207-12 to extend forward, and the second piezoelectric ceramic 202-1 and the first piezoelectric ceramic 202-2 are fixed to the driving stator 201 by pre-tightening bolts 203, and the pre-tightening force of the second piezoelectric ceramic 202-1 and the first piezoelectric ceramic 202-2 can be adjusted by the pre-tightening bolts 203. Through adjustment, the accuracy of the second piezoelectric ceramic 202-1 and the first piezoelectric ceramic 202-2 in controlling the deformation of the driving stator 201 can be guaranteed.

[0039] like Figure 5-6 As shown, a first driving mechanism 206 is provided between two connecting posts 207 - 12 at the front of the amplifying structure 207 - 1 ;

[0040] The first driving mechanism 206 includes a vertical section and a horizontal section, and the overall top view is "T" shaped. The rear end of the vertical section is connected to the center of the connecting section between the two connecting columns, and the vertical section is located between the fixed blocks at the front of the left and right sets of claw structures.

[0041] When the first driving mechanism 206 extends forward, it will drive the entire second clamping mechanism to move forward. When the amplifying structure 207-1 of the first clamping mechanism 207 is restored, the entire first clamping mechanism 207 will also be restored in conjunction. At this time, the rebound force of the rebound mechanism 204 will also help the rebound mechanism 204 to restore, ensuring the restoration effect.

[0042] like Figure 5 As shown, the rebound mechanism 204 includes two second fixing seats 204-1 and a second driving mechanism 204-2. The second driving mechanism 204-2 is arranged opposite to each other in front of the first driving mechanism 206. The two second fixing seats 204-1 are located on both sides of the second driving mechanism 204-2. The two second fixing seats 204-1 are connected to both sides of the vertical section of the second driving mechanism 204-2 through connecting sections. The second fixing seats 204-1 are fixedly installed in the installation position.

[0043] The second clamping mechanism 205 includes two second mounting seats 205-1, which are located between the first driving mechanism 206 and the second driving mechanism 204-2. The two ends of the second piezoelectric ceramic 202-1 abut against the two second mounting seats 205-1. The second mounting seats 205-1 are in the shape of bars arranged vertically in a front-to-back direction.

[0044] The second clamping mechanism 205 further includes a second claw structure 205-2. The two sets of second claw structures 205-2 are arranged in an axisymmetric manner. The second claw structure 205-2 includes a second lever block 205-21 and a second friction block 205-22.

[0045] The second lever block 205-21 of the second claw structure 205-2 on the left is arranged at the front, and the front part of the front second lever block 205-21 is connected to the left end of the horizontal section of the second driving mechanism 204-2 on the right through a connecting section, and the rear part of the front second lever block 205-21 is connected to the opposite surface of the front part of the second mounting seat 205-1 through a connecting section, and the rear part of the rear second lever block 205-21 is connected to the left end of the horizontal section of the rear first driving mechanism 206 on the right through a connecting section, and the front part of the rear second lever block 205-21 is connected to the opposite surface of the rear part of the second mounting seat 205-1 on the right through a connecting section; the left sides of the opposite ends of the front second lever block 205-21 and the rear second lever block 205-21 extend a connecting section to the left, and the two connecting sections are jointly connected to the front right side of the second friction block 205-22.

[0046] The rebound mechanism relies on two second fixed seats 204-1 to form a positioning position, which is connected to the two sides of the second driving mechanism 204-2 and the connecting sections of the two second fixed seats 204-1. These structures constitute a transverse structure. This transverse structure is pushed forward by the vertical section of the second driving mechanism 204-2 and will be restored to the transverse direction through its own plastic rebound when there is no load.

[0047] The overall front-to-back position change of the second clamping mechanism 205 is affected by the forward movement of the first driving mechanism 206. The action of the second claw structure 205-2 of the second clamping mechanism 205 is derived from the deformation of the second piezoelectric ceramic 202-1. The deformation of the second piezoelectric ceramic 202-1 drives the distance between the two second mounting seats 205-1 to increase or restore. The outward movement of the second mounting seat 205-1 will push the second lever block 205-21 to flip outward. When the two second lever blocks 205-21 located on the same side flip outward, the opposite ends will push out the second friction block 205-22 connected to the connecting section. The second friction blocks 205-22 on both sides extend to both sides according to their own driving structure. According to the size of the deformation of the second piezoelectric ceramic 202-1, the force applied by the two second friction blocks 205-22 to the two sides is also different.

[0048] When the device as a whole is working, the driving stator assembly 2 installed on the lower fixed platform assembly 3 drives the upper sliding platform assembly 1 to slide linearly. The sliding relationship relies on the upper platform outer guide rail 103, the upper platform inner guide rail 105, the lower platform inner guide rail 304 and the lower platform outer guide rail 306. The driving stator assembly 2 realizes the linear reciprocating drive of the first driving mechanism 206 through the first clamping mechanism 207 and the first driving mechanism 206. The movement of the second clamping mechanism 205 is driven by the first driving mechanism 206. The first clamping mechanism 207, The first driving mechanism 206 and the second clamping mechanism 205 are reset by the rebound mechanism 204. Among the first driving mechanism 206, the first clamping mechanism 207 and the second clamping mechanism 205, the first clamping mechanism 207 and the second clamping mechanism 205 can respectively form friction contact and non-friction contact with the friction groove, while the first driving mechanism 206 is responsible for the forward and backward position movement. The first clamping mechanism 207 and the first driving mechanism 206 have a linkage relationship, and the position change of the first driving mechanism 206 is controlled by the amplification mechanism 207. -1 is generated when the amplification is performed. Here, the first piezoelectric ceramic 202-2 can be controlled to amplify the amplification mechanism 207-1 until the first clamping mechanism 207 is in friction contact with the friction groove; then the first driving mechanism 206 that moves forward drives the second clamping mechanism 205 to move forward and pushes the rebound mechanism 204 at the front end. After the second clamping mechanism 205 moves forward, the second piezoelectric ceramic 202-1 drives the two second mounting seats 205-1, driving the second claw structures 205-2 on both sides. The force reaches friction contact. At this time, the friction groove and the second claw structures 205- 2 constitutes friction contact. At this time, the contraction of the first piezoelectric ceramic 202-2 will drive the amplifying structure 207-1 to contract, and at the same time drive the first driving mechanism 206 to retreat. At this time, the friction contact between the first clamping mechanism 207 and the upper sliding platform assembly 1 changes from friction contact to non-friction contact, and the second clamping mechanism 205 and the friction groove of the upper sliding platform assembly 1 are still in friction contact. When retreating, it drives the upper sliding platform assembly 1 to move backward. By designing timing control, the upper sliding platform assembly 1 can be moved forward and backward relative to the lower fixed platform assembly 3.

[0049] The voltage timing of the second piezoelectric ceramic 202-1 and the first piezoelectric ceramic 202-2 is controlled, where s1 represents the second piezoelectric ceramic 202-1 and s2 represents the first piezoelectric ceramic 202-2. The specific change method and influence of the timing are as follows: U represents the normal pressure of the second clamping mechanism 205 on the upper platform preload baffle 104, F D represents the normal pressure of the first clamping mechanism 207 on the upper platform pre-tightening baffle 104;

[0050] Step 1: During the t1 period, the first piezoelectric ceramic 202-2 is energized to a low voltage, and both ends of the first piezoelectric ceramic 202-2 extend, and slightly push the driving mechanism to extend in the positive direction of the y-axis. In this step, the first clamping mechanism 207 increases the normal pressure on the upper platform pre-tightening baffle 104, F D ↑, F U <F D ;

[0051] Step 2: During the t2 period, the operating voltage of the first piezoelectric ceramic 202-2 is increased, and the two ends of the first piezoelectric ceramic 202-2 extend again, pushing the first driving mechanism 206 to extend in the positive direction of the y-axis to a greater extent. At this time, the first piezoelectric ceramic 202-2 operates in the high voltage position, and the first driving mechanism 206 will reach the maximum displacement in the positive direction of the y-axis. In this step, the first clamping mechanism 207 will significantly increase the normal pressure F on the upper platform pre-tightening baffle 104. D ↑;

[0052] Step 3: During the t3 period, the first piezoelectric ceramic 202-2 maintains voltage, and the lengths of both ends of the first piezoelectric ceramic 202-2 remain unchanged; the second piezoelectric ceramic 202-1 is energized to the medium voltage, and the normal pressure of the second clamping mechanism 205 on the upper platform pre-tightening baffle 104 increases. At this time, F U ↑, F U >F D ;

[0053] Step 4: During the time period t4, the working voltage of the first piezoelectric ceramic 202-2 drops to 0, the lengths of both ends of the first piezoelectric ceramic 202-2 shrink to their original lengths, and the pressure of the first clamping mechanism 207 on the upper platform pre-tightening baffle 104 decreases. D ↓, the first driving mechanism 206 contracts to its original length; the second piezoelectric ceramic 202-1 maintains a high voltage. Due to the pressure of the second clamping mechanism 205 on the upper platform pre-tightening baffle 104, the second clamping mechanism 205 will drive the upper sliding platform 1 to move as the driving mechanism contracts. At this time, the upper sliding platform 1 will generate a displacement d1 in the negative direction along the y-axis;

[0054] Step 5: During the t5 period, the working voltage of the first piezoelectric ceramic 202-2 rises to a low voltage, the lengths of both ends of the first piezoelectric ceramic 202-2 slightly extend, and the pressure of the first clamping mechanism 207 on the upper platform pre-tightening baffle 104 increases. D ↑, the first driving mechanism 206 moves slightly toward the positive direction of the y-axis; the working voltage of the second piezoelectric ceramic 202-1 drops to 0. In this process, when the working voltage of the second piezoelectric ceramic 202-1 is higher than that of the first piezoelectric ceramic 202-2, there is F U >F DThis causes the upper sliding platform 1 to retreat slightly along the positive y-axis. However, because the rate of decrease in the operating voltage corresponding to the second piezoelectric ceramic 202-1 is much greater than the rate of increase in the operating voltage corresponding to the first piezoelectric ceramic 202-2 during this step, the extent of this retreat is minimal. The platform then returns to Step 1 and begins the cycle again.

[0055] Through a certain simple piezoelectric ceramic timing control, the upper sliding platform can be clamped by the driven stator at all times during its movement, thereby ensuring the accuracy of the displacement; the recoil effect of the piezoelectric driven motor is significantly weakened, thereby improving energy utilization efficiency and displacement accuracy; due to the design of the lever amplification mechanism and bridge amplification mechanism of the driving stator, the step output of the piezoelectric motor presents a linear effect with time, thereby improving the accuracy of the displacement.

[0056] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A piezoelectric drive motor, characterized in that: It includes an upper sliding platform assembly, a driving stator assembly and a lower fixed platform assembly, wherein the driving stator assembly is mounted on the lower fixed platform assembly, the upper sliding platform assembly is slidably mounted on the lower fixed platform assembly, and the driving stator assembly drives the upper sliding platform assembly to move linearly; The upper sliding platform includes an upper base plate, an upper platform guide rail support frame, an upper platform outer guide rail, an upper platform pre-tightening baffle and an upper platform inner guide rail, two upper platform guide rail support frames are arranged opposite to each other on both sides of the bottom of the upper base plate, and the upper platform guide rail support frames are each installed with an upper platform outer guide rail with a rolling surface facing downward; the two upper platform pre-tightening baffles are installed between the two upper platform outer guide rails, and the two upper platform pre-tightening baffles are arranged at intervals; the upper platform pre-tightening baffle includes a horizontal mounting surface and a vertical friction surface, the horizontal mounting surface is installed with the bottom surface of the upper base plate, the two vertical friction surfaces are located in the middle of the upper base plate, and the space between the two vertical friction surfaces constitutes a friction groove; the lower ends of the vertical friction surfaces are each installed with an upper platform inner guide rail, the rolling surfaces of the two upper platform inner guide rails are arranged back to back, and the rolling surface of the upper platform inner guide rail faces outward; The lower fixed platform assembly includes a lower base plate, a guide rail slider, a lower platform pre-tightening baffle, an inner guide rail of the lower platform, a lower platform guide rail support frame, an outer guide rail of the lower platform and a micrometer differential head; the middle part of the lower base plate is the mounting position of the drive stator assembly, and the mounting position is adapted to the position of the friction groove; the lower base plate is installed with a lower platform guide rail support frame at a position corresponding to the outer guide rail of the upper platform, and the upper end of the lower platform guide rail support frame is provided with a lower platform outer guide rail; the positions corresponding to the lower base plate and the upper platform pre-tightening baffle are both provided with guide rail sliders, and the two guide rail sliders are respectively installed with lower guide rails. The platform pre-tightening baffle, the sliding paths of the guide rail sliders on both sides of the installation position are between the two sides of the installation position and the corresponding outer guide rails respectively; the lower platform inner guide rail is installed at the position corresponding to the upper platform inner guide rail above the lower platform pre-tightening baffle, and the sliding surfaces of the lower platform inner guide rail are arranged relatively to each other, and the lower platform inner guide rail forms a sliding fit with the upper platform inner guide rail corresponding to the upper platform; the lower platform outer guide rail is installed with a micrometer differential head with a telescopic end facing the lower platform pre-tightening baffle, and the end of the lower platform pre-tightening baffle close to the lower platform outer guide rail is provided with a top block corresponding to the micrometer differential head; A driving stator assembly is installed at the mounting position, and the driving stator forms friction with the friction groove after receiving voltage.

2. The piezoelectric drive motor according to claim 1, wherein: The driving stator assembly includes a driving stator, a second piezoelectric ceramic and a first piezoelectric ceramic; The driving stator includes a rebound mechanism, a second clamping mechanism, a first driving mechanism, and a first clamping mechanism; The first clamping mechanism includes an amplifying structure, which includes two oppositely arranged first mounting seats and four connecting columns, and the two ends of the first piezoelectric ceramic abut against the two first mounting seats; two connecting columns are provided in the space between the front ends of the two first mounting seats, and the connecting columns are flush with the front ends of the first mounting seats, and the connecting columns are divided into a front mounting part and a rear mounting part by front and rear boundaries, the front end of the first mounting seat is connected to the front mounting part by a connecting section, and the two connecting columns are connected to the rear mounting part by a connecting section; two connecting columns are provided in the space between the lower ends of the two first mounting seats, the lower ends of the two first mounting seats are flush with the rear ends of the two connecting columns, the rear end of the first mounting seat is connected to the rear mounting part by a connecting section, and the two connecting columns at the lower ends of the two first mounting seats are connected to the front mounting part by a connecting section; The first clamping mechanism also includes a claw structure, two groups of left and right claw structures are installed on both sides of the amplifying structure, the claw structure on the left side includes a fixed block, a first lever block and a first friction block; the two fixed blocks are respectively installed at the front and rear positions of the left side of the amplifying structure, and the fixed block is fixedly installed at the mounting position, the front of the front first lever block is connected to the fixed block on the right side through a connecting section, the rear of the front first lever block is connected to the opposite surface of the front of the first mounting seat through a connecting section, the rear of the rear first lever block is connected to the fixed block on the right rear side through a connecting section, and the front of the rear first lever block is connected to the opposite surface of the rear of the first mounting seat through a connecting section; the left sides of the opposite ends of the front first lever block and the rear first lever block extend a connecting section to the left, and the two connecting sections are jointly connected to the front right side of the first friction block; The claw structure on the right side is consistent with the claw structure on the left side, and the claw structure on the right side is mirror-imaged to the claw structure on the left side.

3. The piezoelectric drive motor according to claim 2, wherein: A first driving mechanism is provided between the two connecting columns at the front of the amplifying structure; The first driving mechanism includes a vertical section and a horizontal section, and the overall top view is "T" shaped. The rear end of the vertical section is connected to the center of the connecting section between the two connecting columns, and the vertical section is located between the fixed blocks at the front of the left and right sets of claw structures.

4. The piezoelectric drive motor according to claim 3, wherein: The rebound mechanism includes two second fixing seats and a second driving mechanism, the second driving mechanism is arranged opposite to the front of the first driving mechanism, the two second fixing seats are located on both sides of the second driving mechanism, the two second fixing seats are connected to both sides of the vertical section of the second driving mechanism through a connecting section, and the second fixing seats are fixedly installed in the installation position; The second clamping mechanism includes two second mounting seats, the two second mounting seats are located between the first driving mechanism and the second driving mechanism, the two ends of the second piezoelectric ceramic abut against the two second mounting seats, and the second mounting seats are in the shape of strips arranged vertically in the front and back directions; The second clamping mechanism further includes a second claw structure, wherein the two sets of second claw structures are arranged in an axisymmetric manner, and the second claw structure includes a second lever block and a second friction block; The second lever block of the second claw structure on the left is arranged at the front, the front of the front second lever block is connected to the left end of the horizontal section of the second driving mechanism on the right through a connecting section, the rear of the front second lever block is connected to the opposite surface of the front of the second mounting seat through a connecting section, the rear of the rear second lever block is connected to the left end of the horizontal section of the rear first driving mechanism on the right through a connecting section, and the front of the rear second lever block is connected to the opposite surface of the rear of the second mounting seat on the right through a connecting section; the left sides of the opposite ends of the front second lever block and the rear second lever block extend a connecting section to the left, and the two connecting sections are jointly connected to the front right side of the second friction block.

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