A stick-slip motion platform with a fine-tuning unit and a working method thereof

Abstract

This invention discloses a stick-slip motion platform with a fine-tuning unit and its working method, solving the problem of different friction adjustment methods in existing micro-nano motion platforms. It has the advantages of a reasonable structural design and the ability to adjust friction. The specific solution is as follows: A stick-slip motion platform with a fine-tuning unit includes an adjustable base, a base body, a first through groove, a wedge block within the first through groove, a pre-tightening bolt passing through the base body and connected to the wedge block, and the other side of the wedge block contacting a drive unit connecting plate. A first hinge is connected to the drive unit connecting plate relative to the other side of the wedge block, and the first hinge is connected to the base body; a drive unit engages with the base body and is connected to the drive unit connecting plate; a top plate slides relative to the base body and is fixed to a friction ceramic block, which contacts a drive head.

Description

Technical Field

[0001] This invention relates to the field of micro-nano motion platforms, and in particular to a stick-slip motion platform with a fine-tuning unit and its working method. Background Technology

[0002] The statements in this section merely provide background information related to the present invention and do not necessarily constitute prior art.

[0003] Precision positioning and actuation technology is a key technology in the equipment manufacturing industry and is currently widely used in many cutting-edge fields such as precision manufacturing, micro-nano technology, biomedicine, and measurement. Among them, piezoelectric stick-slip actuators have attracted widespread attention due to their advantages such as small size, high positioning accuracy, fast response speed, and absence of electromagnetic interference.

[0004] Piezoelectric stick-slip actuators typically use sawtooth wave drive signals to induce alternating fast and slow deformations in the stator. This alternating stator deformation causes the mover to experience two distinct motion cycles: "sliding" and "sticking." Stepped output is achieved through the conversion between static and dynamic friction. However, the inventors discovered that existing technologies cannot alter the magnitude of friction, thus hindering fine-tuning and impacting improvements in actuator output performance.

[0005] In addition, in order to achieve reciprocating motion, existing technologies use an asymmetrical structure with an external reverse signal, but this sacrifices the consistency of forward and reverse motion. On the other hand, they use symmetrically mounted actuators, but this undoubtedly increases the size and may introduce assembly errors. Summary of the Invention

[0006] To address the shortcomings of existing technologies, the purpose of this invention is to provide a stick-slip motion platform with a fine-tuning unit, which enables fine-tuning of static friction and improves the output performance of the motion platform.

[0007] To achieve the above objectives, the present invention is implemented through the following technical solution:

[0008] A stick-slip motion platform with a fine-tuning unit, comprising:

[0009] An adjustable base includes a base body, a first through groove, a wedge block in the first through groove, a pre-tightening bolt passing through the base body and connected to the wedge block, the other side of the wedge block contacting the drive unit connecting plate, the drive unit connecting plate being connected to a first hinge relative to the other side of the wedge block, and the first hinge being connected to the base body.

[0010] The drive unit engages with the base body and is connected to the drive unit connecting plate. The drive unit includes a drive body, which is provided with a second through slot. The second through slot is provided with a drive element, which is connected to the amplification mechanism. The amplification mechanism is connected to the drive head.

[0011] The top plate slides relative to the base body, and is fixed to the friction block, which is in contact with the drive head.

[0012] As described above, in the motion platform, the adjustable base is connected to the drive unit via the drive unit connecting plate. The wedge block is adjusted by pre-tightening bolts, thereby adjusting the normal force between the drive head and the friction block to ensure the contact force between the drive head and the friction block. The drive unit is driven by the drive element to drive the movement of the drive head, thereby ensuring the movement of the top plate relative to the adjustable base.

[0013] As described above, in a stick-slip motion platform with a fine-tuning unit, a raised strip is provided on the inner surface of the top plate, and a recess is provided on the raised strip to fix the friction block. The friction block protrudes from the inner surface of the top plate.

[0014] The friction block is a friction ceramic block; the driving element is a piezoelectric ceramic.

[0015] The top plate is connected to the base body via a guide rail pair.

[0016] As described above, in a stick-slip motion platform with a fine-tuning unit, the top of the drive unit connecting plate is provided with a positioning boss on the other side of the first hinge, and the positioning boss is located on one side of the wedge block.

[0017] The drive body is provided with a positioning groove that engages with the positioning boss. The positioning groove and the positioning boss cooperate to facilitate the positioning and installation of the drive unit.

[0018] As described above, in a stick-slip motion platform with a fine-tuning unit, two wedge blocks are arranged in the first through groove. The two wedge blocks are arranged opposite each other, with one wedge block contacting the side of the positioning boss, and the sides of the two wedge blocks contacting each other on the narrower side.

[0019] The sidewall of the first through groove is connected to the positioning boss and the drive unit connecting plate, respectively.

[0020] As described above, in a stick-slip motion platform with a fine-tuning unit, the amplification mechanism includes a bridge amplification mechanism and a lever amplification mechanism. The driving element is connected to the bridge amplification mechanism, the bridge amplification mechanism is connected to the lever amplification mechanism, and the lever amplification mechanism is connected to the driving head.

[0021] As described above, in a stick-slip motion platform with a fine-tuning unit, the bridge amplification mechanism is respectively arranged on the periphery of the driving element in the second through slot, and the bridge amplification mechanism is connected to the driving body.

[0022] The distance between the lever amplification mechanisms on both sides is set.

[0023] As described above, in a stick-slip motion platform with a fine-tuning unit, the driving head is a triangular amplifying driving head. The two sides of the triangular amplifying driving head are respectively connected to one end of the lever driving amplifying mechanism, and the other end of the lever driving amplifying mechanism is connected to the driving body. The driving unit adopts a symmetrical structure, and the driving head is shared for both forward and reverse motion, which has a high consistency between forward and reverse motion.

[0024] The second through slot is open at the tip of the drive head. The side of the triangular amplifying drive head engages with the drive body. The drive body bends inward at the opening of the second through slot, and a step is provided at the end of the bent side. The side of the triangular amplifying drive head is also provided with a step to cooperate with the drive body.

[0025] As described above, in a stick-slip motion platform with a fine-tuning unit, the drive unit connecting plate has a slot on the side facing the base body, and the two sides of the drive body are respectively provided with second positioning surfaces. The limiting block is L-shaped, with one side of the limiting block inserted into the slot and located on the side of the second positioning surface, and the other side of the limiting block located at the bottom of the drive unit connecting plate and connected to the drive unit connecting plate.

[0026] As described above, in a stick-slip motion platform with a fine-tuning unit, an opening is provided on the side of the drive body, through which the signal line of the drive element passes;

[0027] The drive element signal line is connected to the control unit, and the control unit inputs a drive voltage signal to the drive element, thereby controlling the movement of the top plate.

[0028] Secondly, the present invention also provides a method for operating a stick-slip motion platform with a fine-tuning unit, comprising the following:

[0029] Tightening the preload bolts generates longitudinal movement through the lateral movement of the wedge block, which in turn pushes the drive unit connecting plate to produce longitudinal displacement, thereby increasing the normal force between the drive head and the friction block. Conversely, loosening the preload bolts reduces the normal force between the drive head and the friction block.

[0030] Under the action of the input signal, the driving element drives the amplification mechanism to move, which in turn drives the driving head to move;

[0031] The drive head pushes the friction block, which in turn pushes the top plate to slide relative to the adjustable base, generating lateral displacement.

[0032] One drive element on one side receives a sawtooth drive voltage signal, while the other drive element on the other side receives a holding voltage signal. After a set time, the input signals of the drive elements on both sides alternate, repeating this process multiple times to drive the top plate to reciprocate.

[0033] The beneficial effects of the present invention are as follows:

[0034] 1) This invention provides a motion platform. The adjustable base is connected to the drive unit via a drive unit connecting plate. The wedge block is adjusted by pre-tightening bolts, thereby adjusting the normal force between the drive head and the friction block to ensure the contact force between the drive head and the friction block. The drive unit is driven by piezoelectric ceramic to drive the movement of the drive head, thereby ensuring the movement of the top plate relative to the adjustable base and realizing the movement of the motion platform. The whole can realize the adjustment of the static friction force between the drive head and the friction ceramic block, effectively improving the output performance of the motion platform. The structure is reasonably set and will not produce assembly errors.

[0035] 2) The present invention, through the setting of an adjustable base, which is connected to the drive unit, can realize the adjustment of the friction force between the drive head and the friction block; through the wedge block adjustment method, a small longitudinal displacement can be generated, with high adjustment accuracy, and the overall static friction force is increased to improve the load-bearing capacity.

[0036] 3) The present invention adopts a triangular amplification drive head, combined with a bridge amplification mechanism and a lever amplification mechanism, to further increase static friction and reduce sliding friction through coupled motion; moreover, the piezoelectric ceramics on both sides of the drive unit share a single drive head, and the forward and reverse motions are driven separately, which has high consistency between forward and reverse motions.

[0037] 4) The present invention uses a limiting block to position the side of the drive unit and the adjustable base. After the limiting block is removed, the drive unit can be directly pulled out from the side of the motion platform without removing the guide rail, which is convenient for replacement.

[0038] 5) By setting driving elements, i.e. piezoelectric ceramics, on both sides of the driving unit, the present invention can realize reciprocating motion by inputting sawtooth voltage signals or holding voltage signals through the piezoelectric ceramics on both sides, without increasing the size and ensuring the consistency of forward and reverse motion. Attached Figure Description

[0039] The accompanying drawings, which form part of this invention, are used to provide a further understanding of the invention. The illustrative embodiments of the invention and their descriptions are used to explain the invention and do not constitute an improper limitation of the invention.

[0040] Figure 1 This is a schematic diagram of a stick-slip motion platform with a fine-tuning unit according to one or more embodiments of the present invention.

[0041] Figure 2 This is a side view of a stick-slip motion platform with a fine-tuning unit according to one or more embodiments of the present invention.

[0042] Figure 3 This is a schematic diagram of an adjustable base in a stick-slip motion platform with a fine-tuning unit according to one or more embodiments of the present invention.

[0043] Figure 4 This is a schematic diagram of the drive unit in a stick-slip motion platform with a fine-tuning unit according to one or more embodiments of the present invention.

[0044] Figure 5 This is a schematic diagram of the top plate of a stick-slip motion platform with a fine-tuning unit according to one or more embodiments of the present invention.

[0045] Figure 6 This is a schematic diagram of a wedge block in a stick-slip motion platform with a fine-tuning unit according to one or more embodiments of the present invention.

[0046] Figure 7 This is a schematic diagram of a limiting block in a stick-slip motion platform with a fine-tuning unit according to one or more embodiments of the present invention.

[0047] Figure 8 This is a schematic diagram of a friction ceramic block in a stick-slip motion platform with a fine-tuning unit according to one or more embodiments of the present invention.

[0048] Figure 9(a) is a schematic diagram of the driving voltage signal in a stick-slip motion platform with a fine-tuning unit according to one or more embodiments of the present invention.

[0049] Figure 9(b) is a schematic diagram of the voltage signal maintained in a stick-slip motion platform with a fine-tuning unit according to one or more embodiments of the present invention.

[0050] The diagram exaggerates the spacing or dimensions between parts to show their positions; the diagram is for illustrative purposes only.

[0051] Wherein: 1-Adjustable base, 101-Drive unit connecting plate, 102-Straight beam type flexible hinge, 103-Dovetail type flexible hinge, 104-Positioning boss, 105-Slot, 106-Preload bolt, 107-Fourth threaded hole.

[0052] 2-Top plate, 201-Recess, 202-First threaded hole.

[0053] 3-Wedge block.

[0054] 4-Limiting block, 401-First positioning surface, 402-Second threaded hole.

[0055] 5-Guide rail pair.

[0056] 6-Drive unit, 601-Third threaded hole, 602-Bridge amplification mechanism, 603-Lever amplification mechanism, 604-Drive head, 605-Positioning groove, 606-Second positioning surface, 607-Opening, 608-Gap.

[0057] 7- Friction ceramic block.

[0058] 8-Piezoelectric ceramics. Detailed Implementation

[0059] It should be noted that the following detailed description is illustrative and intended to provide further explanation of the invention. Unless otherwise specified, all technical and scientific terms used in this invention have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains.

[0060] It should be noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the scope of exemplary embodiments according to the invention. As used herein, unless otherwise expressly indicated by the invention, the singular form is also intended to include the plural form. Furthermore, it should be understood that when the terms "comprising" and / or "including" are used in this specification, they indicate the presence of features, steps, operations, devices, components, and / or combinations thereof.

[0061] As described in the background section, existing micro-nano motion platforms have different problems in achieving friction adjustment. In order to solve the above technical problems, this invention proposes a stick-slip motion platform with a fine-tuning unit.

[0062] Example 1

[0063] In a typical embodiment of the present invention, reference is made to Figure 1 and Figure 2 As shown, a stick-slip motion platform with a fine-tuning unit includes:

[0064] Adjustable base 1 includes base body, base body is provided with first through groove, wedge block is provided in first through groove, pre-tightening bolt 106 passes through base body and is connected to wedge block 3, the other side of wedge block 3 is in contact with drive unit connecting plate 101, drive unit connecting plate is connected to the other side of wedge block with first hinge, first hinge is connected to base body.

[0065] The drive unit 6 is engaged with the base body and connected to the drive unit connecting plate. The drive unit includes a drive body, which is provided with a second through slot. The second through slot is provided with a drive element, which is a piezoelectric ceramic 8. The piezoelectric ceramic is connected to the amplification mechanism, and the amplification mechanism is connected to the drive head.

[0066] Top plate 2 slides relative to the base body. Top plate is fixed to friction block. The friction block is specifically friction ceramic block 7, but can also be a friction block of other materials. Friction ceramic block 7 is in contact with drive head 604.

[0067] refer to Figure 5 As shown, a raised strip is provided on the inner surface of the top plate 2, and a recess is provided on the raised strip to fix the friction ceramic block. The raised strip is provided along the transverse direction of the top plate, and the recess is provided along the length direction of the raised strip and is located in the middle section of the raised strip. Specifically, the friction ceramic block 7 is glued to the recess 201 of the top plate 2 with a fixing adhesive such as epoxy resin. In this way, the friction ceramic block protrudes from the inner surface of the top plate to ensure contact between the friction ceramic block 7 and the drive head 604.

[0068] refer to Figure 8 As shown, the friction ceramic block 7 is a cuboid with a set length, width and height.

[0069] In this embodiment, the top plate 2 is connected to the base body via guide rail pair 5. Guide rail pairs are provided on both sides of the base body. The guide rail pair is the prior art. The guide rail pair includes two guide rails that can slide relative to each other. One guide rail is connected to the base body and the other guide rail is connected to the top plate.

[0070] In addition, the top plate 2 is provided with two rows of first threaded holes 202 for connection with one of the guide rails in the guide rail pair, and the distance between the position of the friction ceramic block and the first threaded hole in the same row is less than the distance between it and the first threaded hole in the other row.

[0071] refer to Figure 3 As shown, a positioning boss 104 is provided on the top of the drive unit connecting plate 101 on the other side of the first hinge, and the positioning boss is located on one side of the wedge block.

[0072] The drive body is provided with a positioning groove 605 that engages with the positioning boss. The positioning groove and the positioning boss work together to facilitate the positioning and installation of the drive unit.

[0073] In this embodiment, the positioning boss protrudes from the top of one side of the drive unit connecting plate, and the shape of the positioning groove matches the shape of the boss. The positioning boss 104 matches the positioning groove 605 on the drive unit to realize the lateral movement and longitudinal limitation of the drive unit 6 during assembly.

[0074] Specifically, the first hinge is a dovetail flexible hinge 103. The dovetail flexible hinge 103 increases stiffness and generates a larger support reaction force to produce return motion, preventing over-adjustment.

[0075] Two wedge blocks 3 are installed in the first through slot, for reference. Figure 6As shown, the width of one side of the wedge block 3 is greater than that of the other side. The two wedge blocks are arranged opposite each other. One of the wedge blocks contacts the side of the positioning boss, and the sides of the narrower side of the two wedge blocks are in contact. The length of the wedge block is shorter than the length of the first through groove, but greater than half the length of the first through groove. Correspondingly, pre-tightening bolts 106 are provided on both sides of the base body. Each pre-tightening bolt 106 is connected to the wedge block. The wedge block 3 can achieve a displacement drive with a smaller pitch than the bolt pitch feed, thereby achieving more precise adjustment of the drive unit 6.

[0076] The sidewall of the first through slot is connected to the positioning boss 104 and the drive unit connecting plate 101 respectively, specifically through the straight beam type flexible hinge 102. Three straight beam type flexible hinges 102 are set on one side of the first through slot, and the distance between two adjacent straight beam type flexible hinges 102 is set.

[0077] In order to connect the drive unit connecting plate 101 to the drive body, the drive unit connecting plate 101 is provided with a fourth threaded hole 107, which is distributed at the four corners of the drive unit connecting plate.

[0078] When the pre-tightening bolt 106 is rotated clockwise, the longitudinal displacement is generated by the lateral movement of the wedge block 3, thereby pushing the drive unit connecting plate 101 to move perpendicular to the guide rail. To prevent over-adjustment, a dovetail flexible hinge 103 is provided at the connection between the drive unit connecting plate 101 and the adjustable base, which can provide a large return support force. When the pre-tightening bolt 106 is loosened, the drive unit connecting plate 101 is pushed to move in the opposite direction under the combined action of the straight beam flexible hinge 102 and the dovetail flexible hinge 103.

[0079] refer to Figure 4 As shown, the amplification mechanism includes a bridge amplification mechanism 602 and a lever amplification mechanism 603. The piezoelectric ceramic 8 is connected to the bridge amplification mechanism, and the bridge amplification mechanism 602 is connected to the lever amplification mechanism 603. Specifically, they are connected by a double straight beam flexible hinge. The bridge amplification mechanism 602 adopts a composite bridge amplification mechanism, and the lever amplification mechanism is connected to the drive head 604. The lever amplification mechanism adopts a double straight beam flexible hinge to increase the output stiffness.

[0080] Two piezoelectric ceramics 8 are symmetrically arranged on the drive body. Bridge amplification mechanisms 602 are respectively arranged on the periphery of the piezoelectric ceramics in the second through groove. The bridge amplification mechanisms are connected to the drive body. The lever amplification mechanisms on both sides are spaced apart by a set distance. Moreover, a gap 608 is formed between the lever amplification mechanism and the bridge amplification mechanism. This gap 608 also has the function of limiting the lateral displacement of the non-moving end of the drive head 604. However, due to the limitation of processing accuracy, the output performance is mainly improved by the piezoelectric ceramics.

[0081] In this embodiment, the drive head 604 is a triangular amplification drive head. Both sides of the triangular amplification drive head are connected to one end of the lever drive amplification mechanism, and the other end of the lever drive amplification mechanism is connected to the drive body. The drive unit adopts a symmetrical structure, and the drive head is used for both forward and reverse motion, which has a high consistency between forward and reverse motion. Under the action of the horizontal thrust parallel to the guide rail pair 5, the drive unit will generate a coupling displacement perpendicular to the guide rail pair 5. This displacement will increase the static friction force, thereby improving the load capacity.

[0082] In addition, the second through slot is open at the tip of the drive head, the tip of the drive head is located away from the positioning groove 605, the side of the triangular amplification drive head engages with the drive body, the drive body bends inward at the opening of the second through slot, and a step is provided at the end of the bent side, and the side of the triangular amplification drive head is also provided with a step to cooperate with the drive body.

[0083] The drive unit connecting plate 101 has a slot on the side facing the base body. The two sides of the drive body are respectively provided with second positioning surfaces 606. The limiting block 4 is L-shaped. One side of the limiting block is inserted into the slot 105 and is located on the side of the second positioning surface. The other side of the limiting block 4 is located at the bottom of the drive unit connecting plate and is connected to the drive unit connecting plate 101.

[0084] Understandably, the card slot 105 is located on the side of the drive unit connecting plate and is recessed inward.

[0085] refer to Figure 7 As shown, the limiting block 4 includes a base plate, and two first positioning surfaces 401 are provided on one side of the base plate. The two first positioning surfaces are spaced apart by a set distance to avoid the straight beam type flexible hinge 102. The first positioning surfaces are perpendicular to the base plate, making the limiting block 4 L-shaped. The base plate of the limiting block 4 is provided with a second threaded hole 402, so that the limiting block can be connected to the drive unit connecting plate and the drive body from the bottom of the adjustable base.

[0086] In this embodiment, limiting blocks are provided on both sides of the drive unit connecting plate.

[0087] The second threaded hole 402 of the limiting block 4, the fourth threaded hole 107 and the third threaded hole 601 of the drive unit connecting plate 101 are bolted together to achieve lateral limiting and fixing of the drive unit; the first positioning surface 401 of the limiting block 4 cooperates with the slot 105 of the drive unit connecting plate 101 and the second positioning surface 606 of the drive unit 6.

[0088] When the drive unit 6 wears out, after removing the bolts, the drive unit can be pulled out from the side without removing the guide rail pair 5. When installing the drive unit 6, use the limiting block 4 on one side for lateral positioning, insert the positioning groove 605 along the positioning boss 104, and after complete positioning, install the limiting block 4 on the other side and tighten the bolts.

[0089] It should be noted that an opening 607 is provided on the side of the drive body, through which the piezoelectric ceramic signal line passes; the piezoelectric ceramic signal line is connected to the control unit, and the control unit inputs a drive voltage signal to the piezoelectric ceramic, thereby controlling the movement of the top plate.

[0090] Specifically, the control unit is a computer or other type of controller.

[0091] The stick-slip motion platform with a fine-tuning unit disclosed in this embodiment can be applied to micro-nano positioning and other fields, and has a wide range of applications in the field of measurement.

[0092] Example 2

[0093] This embodiment provides a method for operating a stick-slip motion platform with a fine-tuning unit, including the following:

[0094] Tighten the preload bolts to generate longitudinal movement through the lateral movement of the wedge block, which in turn pushes the drive unit connecting plate to generate longitudinal displacement, thereby increasing the normal force between the drive head and the friction ceramic block. Conversely, loosen the warning bolts to reduce the normal force between the drive head and the friction ceramic block.

[0095] When a piezoelectric ceramic is subjected to an input signal, it drives the amplification mechanism to move, which in turn drives the drive head to move.

[0096] The drive head pushes the friction ceramic block, which in turn pushes the top plate to slide relative to the adjustable base, generating lateral displacement (lateral displacement refers to displacement parallel to the guide rail pair);

[0097] One side of the piezoelectric ceramic receives a sawtooth-shaped drive voltage signal, while the other side receives a holding voltage signal. After a set time, the input signals from the two piezoelectric ceramics alternate, repeating this process multiple times. This drives the top plate to reciprocate.

[0098] Specifically, when the platform needs to be driven to move in the horizontal direction, a driving voltage signal as shown in Figure 9(a) is input to the piezoelectric ceramic 8 in the opposite direction of the direction to be moved. The driving voltage signal is a sawtooth wave signal, which is first gradually increased, then gradually decreased, then gradually increased again and then gradually decreased again.

[0099] When a driving voltage signal as shown in Figure 9(a) is input to one side of the piezoelectric ceramic 8, and a holding voltage signal as shown in Figure 9(b) is input to the other side, the holding voltage signal first gradually increases and then remains constant, so as to avoid or reduce the lateral displacement of the non-moving side of the driving head 604.

[0100] Moreover, when one side of the drive head 604 generates a lateral displacement parallel to the guide rail pair 5, a longitudinal displacement perpendicular to the guide rail pair 5 will also be generated. This longitudinal displacement allows the drive head to press against the friction ceramic block, thereby driving the movement of the friction ceramic block.

[0101] At the rising edge of the driving voltage signal, the piezoelectric ceramic 8 slowly elongates with the driving voltage signal, and the friction head 604 drives the top plate 2 to move laterally due to static friction. At the falling edge of the driving voltage signal, the piezoelectric ceramic 8 rapidly shortens with the driving voltage signal, and the driving head 604 moves rapidly in the negative direction, generating dynamic friction. The top plate 2 remains stationary or undergoes a slight displacement due to inertia. By repeating the above process, stepping motion can be achieved.

[0102] The process of moving in the negative direction is similar to that of moving in the positive direction, except that the driving voltage signal and the holding voltage signal are reversed.

[0103] The above description is merely a preferred embodiment of the present invention and is not intended to limit the invention. Various modifications and variations can be made to the present invention by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

Claims

1. A stick-slip motion platform with a fine-tuning unit, characterized in that, include: An adjustable base includes a base body with a first through groove. Two opposing wedge-shaped blocks are arranged in the first through groove, with their narrower sides in contact. A pre-tightening bolt passes through the base body and connects to the wedge blocks. The other side of the wedge blocks contacts a drive unit connecting plate. A first hinge is connected to the drive unit connecting plate relative to the other side of the wedge blocks, and the first hinge is connected to the base body. A positioning boss is provided on the top of the drive unit connecting plate relative to the first hinge, located on one side of the wedge blocks. The sidewall of the first through groove is connected to the positioning boss and the drive unit connecting plate, respectively. The drive unit engages with the base body and is connected to a drive unit connecting plate. The drive unit includes a drive body with a positioning groove that engages with a positioning boss. The drive body also has a second through slot containing at least two symmetrically arranged drive elements. These drive elements are connected to an amplification mechanism, which includes a bridge amplification mechanism and a lever amplification mechanism. The drive elements are connected to the bridge amplification mechanism, which in turn is connected to the lever amplification mechanism, which is connected to the drive head. Both forward and reverse movements share the same drive head, resulting in high consistency between forward and reverse movements. The drive elements are piezoelectric ceramics. The driving head is a triangular amplification driving head, with both sides of the triangular amplification driving head connected to one end of the lever driving amplification mechanism, and the other end of the lever driving amplification mechanism connected to the driving body. The second through slot is open at the tip of the drive head, and the side of the triangular amplifying drive head engages with the drive body; The top plate slides relative to the base body and is fixed to the friction block, which is in contact with the drive head. The inner surface of the top plate is provided with a protrusion, and the protrusion is provided with a recess to fix the friction block. The friction block protrudes from the inner surface of the top plate.

2. The stick-slip motion platform with a fine-tuning unit according to claim 1, characterized in that, The friction block is a friction ceramic block; The top plate is connected to the base body via a guide rail pair.

3. The stick-slip motion platform with a fine-tuning unit according to claim 1, characterized in that, The bridge amplification mechanism is respectively provided on the periphery of the driving element in the second through slot, and the bridge amplification mechanism is connected to the driving body; The distance between the lever amplification mechanisms on both sides is set.

4. The stick-slip motion platform with a fine-tuning unit according to claim 1, characterized in that, The drive unit connecting plate has a slot on the side facing the base body. The two sides of the drive body are respectively provided with second positioning surfaces. The limiting block is L-shaped. One side of the limiting block is inserted into the slot and located on the side of the second positioning surface. The other side of the limiting block is located at the bottom of the drive unit connecting plate and connected to the drive unit connecting plate.

5. A stick-slip motion platform with a fine-tuning unit according to claim 1, characterized in that, The drive body has an opening on its side, through which the drive element signal line passes; The drive element signal lines are connected to the control unit.

6. A method for operating a stick-slip motion platform with a fine-tuning unit according to any one of claims 1-5, characterized in that, Includes the following: Tightening the preload bolts generates longitudinal movement through the lateral movement of the wedge block, which in turn pushes the drive unit connecting plate to produce longitudinal displacement, thereby increasing the normal force between the drive head and the friction block. Conversely, loosening the preload bolts reduces the normal force between the drive head and the friction block. Under the action of the input signal, the driving element drives the amplification mechanism to move, which in turn drives the driving head to move; The drive head pushes the friction block, which in turn pushes the top plate to slide relative to the adjustable base, generating lateral displacement. One drive element on one side receives a sawtooth drive voltage signal, while the other drive element on the other side receives a holding voltage signal. After a set time, the input signals of the drive elements on both sides alternate, repeating this process multiple times to drive the top plate to reciprocate.

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