Displacement reduction device and drive system

Abstract

This invention discloses a displacement reduction device and driving system, relating to the field of precision drive and transmission technology. Based on the differential principle combined with a flexible hinge, a symmetrical differential lever group is designed to build a flexible displacement reduction mechanism. A piezoelectric stacked linear actuator with closed-loop feedback is used to provide displacement input, achieving rapid displacement response and stable displacement output. Different reduction ratios and displacement output directions can be designed according to usage requirements, improving design flexibility.

Description

Technical Field

[0001] This invention relates to the field of precision drive and transmission technology, and in particular to a displacement reduction device and drive system. Background Technology

[0002] In recent years, with the continuous development of high-tech fields such as laser communication, bioengineering, nanofabrication, precision optics, and micromechanics, high-resolution micro / nano actuators or micro actuators have been widely used in various applications requiring ultra-high displacement resolution. Currently, most motion systems combining microactuators and flexible mechanisms are used for motion transmission and stroke amplification, primarily for sub-micron or micron displacement resolution applications, such as optical system adjustment and fiber optic alignment coupling. However, in specific applications, such as particle grasping, movement, and molecular puncture, the motion system needs to have displacement reduction characteristics to achieve sub-nanometer or even picometer-level displacement resolution.

[0003] In related technologies, displacement reduction devices include actuators and lever mechanisms. The lever mechanism has a fixed fulcrum, an input end, and an output end. The input end is connected to the actuator to acquire the displacement input, and the output end is used to amplify or reduce the acquired displacement input and transmit it to an external motion platform to achieve displacement control. However, because it has a fixed fulcrum, this lever mechanism can only amplify or reduce the displacement input in one direction, and cannot achieve arbitrary scaling of the displacement input, which is not conducive to meeting the diverse motion requirements of the motion system. Summary of the Invention

[0004] The purpose of this invention is to provide a displacement reduction device, which aims to scale the displacement input by any ratio, so that the output component can move in the forward, reverse or stationary direction, which is beneficial to meeting the various motion requirements of the motion system.

[0005] To achieve the above objectives, the present invention proposes a displacement reduction device, comprising an input component, a flexible transmission mechanism, and an output component. One end face of the input component is provided with a first displacement input end and a second displacement input end, respectively, to input an initial displacement amount. The flexible transmission mechanism includes a first input lever, a second input lever, and a differential lever. The first input lever has a first fixed fulcrum, a first input end, and a first output end. The first input end is hinged to the first displacement input end to obtain the initial displacement amount, and the first output end outputs a first reduced displacement amount. The second input lever has a second fixed fulcrum, a second input end, and a second output end. The second input end is hinged to the second displacement input end to obtain the initial displacement amount, and the second output end outputs a second reduced displacement amount. The output directions of the second reduced displacement and the first reduced displacement are the same; the differential lever is provided with a first differential end, a second differential end, and a differential output end. The first differential end is hinged to the first output end to obtain the first reduced displacement, and the second differential end is hinged to the second output end to obtain the second reduced displacement; when the second differential end is used as a fulcrum, the differential output end scales the first reduced displacement in the reverse direction to output the first differential displacement, and when the first differential end is used as a fulcrum, the differential output end scales the second differential displacement in the forward direction to output the second differential displacement. The differential output end outputs the first differential displacement and the second differential displacement by superposition; the output component is provided with a displacement output end, which is hinged to the differential output end to output the displacement motion.

[0006] Optionally, there are two of each of the first displacement input end, the second displacement input end, the flexible transmission mechanism, and the displacement output end, and the two first displacement input ends, the two second displacement input ends, the flexible transmission mechanism, and the displacement output end are symmetrically arranged along the same axial direction.

[0007] Optionally, the input component, the flexible transmission mechanism, and the output component are integrally formed.

[0008] Optionally, the flexible transmission mechanism further includes a fixing member, which has a first fixing end and a second fixing end spaced apart along a direction perpendicular to the initial displacement. The first fixing fulcrum is hinged to the first fixing end, and the second fixing fulcrum is hinged to the second fixing end.

[0009] Optionally, the first fixed fulcrum is hinged to the first fixed end via an arc-shaped flexible hinge. And / or, the second fixed fulcrum is hinged to the second fixed end via an arc-shaped flexible hinge.

[0010] Optionally, the fastener has a mounting hole for fasteners to pass through in order to mount the fastener to the support platform.

[0011] Optionally, the number of mounting holes is provided in multiples, and the multiple mounting holes are spaced apart from the fastener.

[0012] Optionally, the first fixed fulcrum is located between the first input terminal and the first output terminal, so that the first reduction displacement and the initial displacement are in opposite directions; the second fixed fulcrum is located between the second input terminal and the second output terminal, so that the second reduction displacement and the initial displacement are in opposite directions.

[0013] Optionally, the first output terminal is hinged to the first differential terminal via a straight beam type flexible hinge. And / or, the differential output terminal is hinged to the displacement output terminal via a straight beam type flexible hinge.

[0014] The present invention also proposes a driving system, which includes the displacement reduction device and the piezoelectric element as described above, wherein the piezoelectric element is disposed on the side of the input member opposite to the first displacement input end and the second displacement input end.

[0015] Compared to existing lever mechanisms with fixed fulcrums, which can only amplify or reduce the displacement input in one direction and cannot scale the displacement input by any proportion, thus failing to meet the diverse motion requirements of motion systems, this invention uses a differential lever with the first and second differential ends as fulcrums to obtain first and second differential displacements in opposite directions. The first and second differential displacements are then superimposed to output the displacement motion, allowing for arbitrary scaling of the initial displacement, enabling the output component to move in forward, reverse, or stationary directions, thus better meeting the diverse motion requirements of motion systems. Attached Figure Description

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

[0017] Figure 1 This is a schematic diagram of a structure of an embodiment of the displacement reduction device of the present invention;

[0018] Figure 2 for Figure 1 A schematic diagram of the mid-displacement reduction device in a non-operating state;

[0019] Figure 3 for Figure 1 A schematic diagram of the unidirectional output structure of the displacement reduction device;

[0020] Figure 4 This is a schematic diagram of an embodiment of a displacement reduction device with reverse output.

[0021] Explanation of icon numbers:

[0022]

[0023] The realization of the objective, functional features and advantages of the present invention will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation

[0024] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present invention.

[0025] It should be noted that all directional indications (such as up, down, left, right, front, back, etc.) in the embodiments of the present invention are only used to explain the relative positional relationship and movement of each component in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indication will also change accordingly.

[0026] In this invention, unless otherwise explicitly specified and limited, the terms "connection," "fixed," etc., should be interpreted broadly. For example, "fixed" can mean a fixed connection, a detachable connection, or an integral part; it can mean a mechanical connection or an electrical connection; it can mean a direct connection or an indirect connection through an intermediate medium; it can mean the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0027] Furthermore, in this invention, descriptions involving "first," "second," etc., are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined with "first" or "second" may explicitly or implicitly include at least one of those features. Additionally, the word "and / or" throughout the text means including three parallel solutions; taking "A and / or B" as an example, it includes solution A, solution B, or a solution that simultaneously satisfies A and B. Furthermore, the technical solutions of the various embodiments can be combined with each other, but this must be based on the ability of those skilled in the art to implement them. When the combination of technical solutions is contradictory or impossible to implement, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection claimed by this invention.

[0028] In recent years, with the continuous development of high-tech fields such as laser communication, bioengineering, nanofabrication, precision optics, and micromechanics, high-resolution micro / nano actuators or micro-actuators have been widely used in various applications requiring ultra-high displacement resolution. To meet the needs of different motion resolutions and displacement strokes, the currently widely adopted solution is to use micro-displacement actuators such as piezoelectric elements or voice coil motors as driving devices and design flexible mechanisms as transmission devices to form a motion system. Currently, most motion systems using a combination of micro-actuators and flexible mechanisms are used for motion transmission and stroke amplification, mainly applied to sub-micron or micron displacement resolution applications, such as optical system adjustment and fiber optic alignment coupling. However, in specific applications, such as particle grasping, movement, and molecular puncture, the motion system needs to have displacement reduction characteristics to achieve sub-nanometer or even picometer-level displacement resolution.

[0029] Some scholars abroad have used elastic elements of different stiffness to build flexible mechanisms and achieved nanoscale non-contact displacement reduction motion through external magnetic force. However, because the elastic elements used have the disadvantage of time lag, the displacement response of the mechanism is slow.

[0030] Some domestic scholars have used symmetrical double parallel four-bar guide modules to build a flexible displacement reduction mechanism. The reduction displacement is generated by the voice coil motor driving mechanism. With a large stroke, the motion resolution reaches the nanometer level. However, because the effective air gap of the voice coil motor affects the magnetic flux density, it directly affects the thrust output. Under the condition of external environmental fluctuations, the output displacement will be unstable and self-locking cannot be achieved.

[0031] In related technologies, displacement reduction devices include actuators and lever mechanisms. The lever mechanism has a fixed fulcrum, an input end, and an output end. The input end is connected to the actuator to acquire the displacement input, and the output end is used to amplify or reduce the acquired displacement input and transmit it to an external motion platform to achieve displacement control. However, because it has a fixed fulcrum, this lever mechanism can only amplify or reduce the displacement input in one direction, and cannot achieve arbitrary scaling of the displacement input, which is not conducive to meeting the diverse motion requirements of the motion system.

[0032] To address the aforementioned problems, the present invention proposes a displacement reduction device 10, which aims to scale the displacement input by any ratio, enabling the output component 8 to move in the forward, reverse, or stationary directions, thereby satisfying various motion requirements of the motion system.

[0033] Reference Figures 1 to 4 In one embodiment of the present invention, the displacement reduction device 10 includes an input component 1, a flexible transmission mechanism, and an output component 8. One end face of the input component 1 is provided with a first displacement input end 11 and a second displacement input end 13 spaced apart to input an initial displacement amount X0, respectively. The flexible transmission mechanism includes a first input lever 3, a second input lever 5, and a differential lever 7. The first input lever 3 is provided with a first fixed fulcrum 31, a first input end 33, and a first output end 35. The first input end 33 is hinged to the first displacement input end 11 to obtain the initial displacement amount X0, and the first output end 35 outputs a first reduced displacement amount X1. The second input lever 5 is provided with a second fixed fulcrum 51, a second input end 53, and a second output end 55. The second input end 53 is hinged to the second displacement input end 13 to obtain the initial displacement amount X0, and the second output end 55 outputs a second reduced displacement amount X2. The second reduced displacement amount X2 and the... The output direction of the first reduced displacement X1 is the same; the differential lever 7 is provided with a first differential end 71, a second differential end 73 and a differential output end 75. The first differential end 71 is hinged to the first output end 35 to obtain the first reduced displacement X1, and the second differential end 73 is hinged to the second output end 55 to obtain the second reduced displacement X2; when the second differential end 73 is used as the fulcrum, the differential output end 75 scales the first reduced displacement X1 in the reverse direction to output the first differential displacement X11, and when the first differential end 71 is used as the fulcrum, the differential output end 75 scales the second reduced displacement X2 in the forward direction to output the second differential displacement X22. The differential output end 75 outputs the first differential displacement X11 and the second differential displacement X22 by superimposing them; the output component 8 is provided with a displacement output end 81, which is hinged to the differential output end 75 to output the displacement movement Y0.

[0034] One end face of the input part 1 is provided with a first displacement input end 11 and a second displacement input end 13 at intervals, and the other end face is used to dock with the driving part to obtain the displacement amount input by the driving part, so that the input part 1 inputs the initial displacement amount X0 into the flexible transmission mechanism through the first displacement input end 11 and the second displacement input end 13 respectively. For example, the driving part can be selected as a piezoelectric element or a voice coil motor.

[0035] The flexible transmission mechanism is a system mainly composed of flexible hinges and levers. Displacement is transmitted by connecting flexible hinges to each end of the lever. It should be noted that referring to Figure 1 , the flexible transmission mechanism includes a first input lever 3, a second input lever 5 and a differential lever 7. By designing the distance L1 from the first input end 33 to the first fixed fulcrum 31 and the distance L2 from the first output end 35 to the first fixed fulcrum 31, the scaling ratio of the first input lever 3 for the initial displacement amount X0 can be adjusted to output different magnitudes of the first reduced displacement amount X1. Similarly, by designing the distance L3 from the second input end 53 to the second fixed fulcrum 51 and the distance L4 from the second output end 55 to the second fixed fulcrum 51, the scaling ratio of the second input lever 5 for the initial displacement amount X0 can be adjusted to output different magnitudes of the second reduced displacement amount X2. Similarly, by designing the distance L5 + L6 from the second output end 55 to the first differential end 71 and the distance L6 from the second output end 55 to the second differential end 73, the scaling ratio of the first differential displacement amount X11 of the differential output end 75 to the first reduced displacement amount X1 and the scaling ratio of the second differential displacement amount X22 of the differential output end 75 to the first reduced displacement amount X2 can be adjusted. By superimposing and outputting the first differential displacement amount X11 and the second differential displacement amount X22, the differential output end 75 can drive the output part 8 to perform a movement with a displacement movement amount Y0. For example, when X11 > X22, referring to Figure 3 , the differential output end 75 drives the output part 8 to perform a forward movement; when X11 < X22, referring to Figure 4 , the differential output end 75 drives the output part 8 to perform a reverse movement. In summary, the displacement reduction device meets the movement requirements of the movement system in many aspects. Therefore, the displacement reduction device 10 of the solution of the present invention can achieve a greater accuracy and a wider range of the displacement movement amount Y0.

[0036] The output part 8 can perform forward, reverse or stationary movements under the drive of the flexible transmission mechanism and can be used to connect external components to achieve precise displacement of the external components.

[0037] Compared to existing lever mechanisms, which use fixed fulcrums and can only amplify or reduce the displacement input in one direction, this invention cannot scale the displacement input by any proportion, thus failing to meet the diverse motion requirements of a motion system. The present invention uses a differential lever 7 with the first differential end 71 and the second differential end 73 as fulcrums, thereby obtaining a first differential displacement X11 and a second differential displacement X22 in opposite directions. The first differential displacement X11 and the second differential displacement X22 are superimposed to output the displacement Y0. This allows for arbitrary scaling of the initial displacement X0, enabling the output component 8 to move in forward, reverse, or stationary directions, thus better meeting the diverse motion requirements of a motion system.

[0038] Reference Figure 1 In one embodiment of the present invention, there are two of each of the first displacement input terminal 11, the second displacement input terminal 13, the flexible transmission mechanism, and the displacement output terminal 81, and the two first displacement input terminals 11, the second displacement input terminals 13, the flexible transmission mechanism, and the displacement output terminal 81 are symmetrically arranged along the same axial direction.

[0039] In this embodiment, the displacement reduction device 10 is symmetrically arranged. In the direction perpendicular to the axis, it can cancel out the derivative displacement generated during the movement of the flexible transmission mechanism, ensuring that the output component 8 moves in the vertical direction without any offset in the left or right direction. This is beneficial to improving the movement accuracy of the displacement reduction device 10.

[0040] Reference Figure 1 In one embodiment of the present invention, the input component 1, the flexible transmission mechanism, and the output component 8 are integrally formed.

[0041] In this embodiment, the input component 1, the flexible transmission mechanism and the output component 8 are integrated into a single molding, which is conducive to the mass production of the displacement reduction device 10, the compact structure of the displacement reduction device 10, and the improved production and assembly efficiency since no precise installation and debugging are required.

[0042] Reference Figure 1 In one embodiment of the present invention, the flexible transmission mechanism further includes a fixing member 9, which is provided with a first fixing end and a second fixing end at intervals along a direction perpendicular to the initial displacement. The first fixing fulcrum 31 is hinged to the first fixing end, and the second fixing fulcrum 51 is hinged to the second fixing end.

[0043] In this embodiment, the first fixed end and the second fixed end are respectively arranged at intervals along the direction perpendicular to the initial displacement, so that the first fixed fulcrum 31 and the second fixed fulcrum 51 can be fixed on the same fixed member 9 respectively. Compared with setting the fixed member 9 separately to fix the first fixed end and the second fixed end, this solution can further realize the compact structure of the flexible transmission mechanism and better support stability by designing an integral fixed member 9 to fix the first fixed end and the second fixed end.

[0044] Reference Figure 1 In one embodiment of the present invention, the first fixed fulcrum 31 is hinged to the first fixed end via an arc-shaped flexible hinge B. And / or, the second fixed fulcrum 51 is hinged to the second fixed end via an arc-shaped flexible hinge E.

[0045] In this embodiment, the use of arc-shaped flexible hinges at the minor deformation points of the mechanism can ensure that the deformation rotation center is well positioned, which is beneficial to improving the scaling accuracy of the first input lever 3 and the second input lever 5.

[0046] Reference Figure 1 In one embodiment of the present invention, the fastener 9 is provided with a mounting hole 91, which is used for fasteners to pass through to install the fastener 9 onto the support platform.

[0047] The mounting hole 91 may be threaded, and the fastener may be a bolt, which is used to install the fixing component 9. The support platform is a component used to fix the displacement reduction device 10.

[0048] In this embodiment, mounting holes 91 are provided on the surface of the fixing member 9. The fixing member 9 is installed on the support platform by fasteners passing through the mounting holes 91, so that the displacement reduction device 10 is fixedly mounted on the support platform and the output member 8 can be output vertically. The fixing member 9 in this solution has a simple structural design, which is conducive to further realizing the integrated molding of the displacement reduction device 10 as a whole, and the connection strength is good, which can meet the fixing requirements of the first fixed support point 31 and the second fixed support point 51.

[0049] Reference Figure 1 In one embodiment of the present invention, a plurality of mounting holes 91 are provided, and the plurality of mounting holes 91 are spaced apart from the fixing member 9.

[0050] In this embodiment, a plurality of mounting holes 91 are provided on the fastener 9. One mounting hole 91 is used to pass a bolt through, which helps to increase the preload of the fastener 9 when it is installed on the support platform, so as to further ensure the fixing requirements of the first fixed support point 31 and the second fixed support point 51.

[0051] For example, Figure 3 The number of mounting holes 91 in the middle fastener 9 can be set to 2. Figure 4 The number of mounting holes 91 of the fixing component 9 can be set to 3. This allows for the selection of bolts with the largest possible diameter based on the size of the mechanism. This ensures that the bolts can withstand greater axial loads and shear forces during the movement of the flexible transmission mechanism, preventing the fixing component 9 from losing its fixed state due to bolt failure caused by excessive shear force, thus affecting the precise displacement output of the mechanism.

[0052] Reference Figure 1 In one embodiment of the present invention, the first fixed fulcrum 31 is disposed between the first input terminal 33 and the first output terminal 35 so that the first shrinkage displacement and the initial displacement are in opposite directions; the second fixed fulcrum 51 is disposed between the second input terminal 53 and the second output terminal 55 so that the second shrinkage displacement and the initial displacement are in opposite directions.

[0053] In this embodiment, the first fixed fulcrum 31 is located between the first input end 33 and the first output end 35, which facilitates the direct connection of the first input end 33 to the first displacement input end 11 of the input component 1. While ensuring that the first output end 35 can output fully, it also helps to make the structure of the displacement reduction device 10 more compact. Similarly, the second fixed fulcrum 51 is located between the second input end 53 and the second output end 55, which facilitates the connection of the second input end 53 to the second displacement input end 13 of the input component 1. While ensuring that the first output end 35 can output fully, it also helps to make the structure of the displacement reduction device 10 more compact.

[0054] Reference Figure 1 In one embodiment of the present invention, the first output terminal 35 is hinged to the first differential terminal 71 via a straight beam type flexible hinge C. And / or, the differential output terminal 75 is hinged to the displacement output terminal 81 via a straight beam type flexible hinge G.

[0055] In this embodiment, a straight beam flexible mechanism is used at the point of large deformation of the mechanism, which can ensure the requirements of large deformation and displacement transmission of the mechanism, and thus helps to ensure the output dimensions of the first output end 35 and the differential output end 75 respectively.

[0056] Optionally, the first input end 33 is hinged to the first displacement input end 11 via an arc-shaped flexible hinge A. The second input end 53 is hinged to one end of the connecting rod 131 via an arc-shaped flexible hinge D, and the other end of the connecting rod 131 is connected to the second displacement input end 13. By setting the connecting rod 131, the initial displacement X0 of the second input end 53 can be transmitted, which is beneficial to further simplifying and miniaturizing the structure of the displacement reduction device 10. The second output end 55 is hinged to the second differential end 73 of the differential lever 7 via an arc-shaped flexible hinge F.

[0057] The present invention also proposes a driving system, which includes the displacement reduction device 10 and the piezoelectric element as described above, wherein the piezoelectric element is disposed on the side of the input member 1 opposite to the first displacement input end 11 and the second displacement input end 13.

[0058] This drive system can be applied to optical motion systems, as well as to operations such as particle grasping, movement, and molecular puncture. The piezoelectric element can be a piezoelectric stacked linear actuator with closed-loop feedback, which provides displacement input to input element 1, thus further meeting the diverse motion requirements of the motion system.

[0059] In summary, existing displacement reduction technologies suffer from several drawbacks: slow displacement output response due to the inherent time lag of the reduction structure; unstable displacement output due to actuator thrust limitations and the inability to achieve displacement self-locking; and inability to arbitrarily adjust the displacement reduction direction as needed due to structural limitations. Our solution, based on the differential principle combined with flexible hinges, designs a symmetrical differential lever assembly and constructs a flexible transmission mechanism to achieve displacement scaling. A piezoelectric stacked linear actuator with closed-loop feedback provides the displacement input, achieving rapid displacement response and stable displacement output. This allows for the design of different reduction ratios and displacement output directions according to application requirements, improving design flexibility.

[0060] The displacement reduction device 10 of this invention has the following advantages: It utilizes the differential principle, that is, by designing differential levers 7 to form two sets of lever modules, the output displacement directions of each module are opposite, forming a differential superposition effect. By changing the relevant dimensions of the lever structure in the reduction mechanism, displacement output with any reduction ratio can be achieved. It uses flexible hinges for displacement transmission. Since flexible hinges have no mechanical friction and no movement gaps, they utilize elastic deformation to transmit micro-equivalent displacement, resulting in rapid displacement response and good dynamic characteristics. After the displacement reduction device 10 is designed, it can be integrated into a single unit, resulting in a compact structure and small size. Compared with the symmetrical double parallel four-bar guide mechanism scheme, our scheme can adjust the direction of the output displacement by changing the lever dimensions, making the design more flexible.

[0061] The above description is merely a preferred embodiment of the present invention and does not limit the patent scope of the present invention. Any equivalent structural transformations made using the contents of the present invention's specification and drawings under the inventive concept of the present invention, or direct / indirect applications in other related technical fields, are included within the patent protection scope of the present invention.

Claims

1. A displacement reduction device, characterized in that, The displacement reduction device includes: An input device, wherein one end face of the input device is provided with a first displacement input terminal and a second displacement input terminal at a distance, so as to input the initial displacement amount respectively; A flexible transmission mechanism includes a first input lever, a second input lever, and a differential lever. The first input lever has a first fixed fulcrum, a first input end, and a first output end. The first input end is hinged to the first displacement input end to obtain the initial displacement amount, and the first output end outputs a first reduced displacement amount. The second input lever has a second fixed fulcrum, a second input end, and a second output end. The second input end is hinged to the second displacement input end to obtain the initial displacement amount. The second output end outputs a second reduced displacement amount. The output direction of the second reduced displacement amount and the first reduced displacement amount is the same. The differential lever has a first differential end, a second differential end, and a differential output end. The first differential end is hinged to the first output end to obtain the first reduced displacement, and the second differential end is hinged to the second output end to obtain the second reduced displacement. When the second differential end is used as a fulcrum, the differential output end scales the first reduced displacement in the reverse direction to output the first differential displacement. When the first differential end is used as a fulcrum, the differential output end scales the second reduced displacement in the forward direction to output the second differential displacement. The differential output end outputs a superimposed value based on the first differential displacement and the second differential displacement. An output component, wherein the output component is provided with a displacement output end, the displacement output end being hinged to the differential output end to output the displacement motion; The first displacement input end, the second displacement input end, the flexible transmission mechanism, and the displacement output end are each provided in twos, and the two first displacement input ends, the two second displacement input ends, the flexible transmission mechanism, and the displacement output ends are symmetrically arranged along the same axial direction. The first fixed fulcrum is located between the first input terminal and the first output terminal, so that the first reduction displacement and the initial displacement are in opposite directions; the second fixed fulcrum is located between the second input terminal and the second output terminal, so that the second reduction displacement and the initial displacement are in opposite directions.

2. The displacement reduction device as described in claim 1, characterized in that, The input component, the flexible transmission mechanism, and the output component are integrally molded.

3. The displacement reduction device as described in claim 1, characterized in that, The displacement reduction device further includes a fixing member, which has a first fixing end and a second fixing end spaced apart along a direction perpendicular to the initial displacement. The first fixing point is hinged to the first fixing end, and the second fixing point is hinged to the second fixing end.

4. The displacement reduction device as described in claim 3, characterized in that, The first fixed fulcrum is hinged to the first fixed end by an arc-shaped flexible hinge. And / or, the second fixed fulcrum is hinged to the second fixed end by an arc-shaped flexible hinge.

5. The displacement reduction device as described in claim 3, characterized in that, The fastener has mounting holes for fasteners to pass through in order to mount the fastener onto the support platform.

6. The displacement reduction device as described in claim 5, characterized in that, The mounting holes are provided in multiple quantities, and the mounting holes are spaced apart from the fastener.

7. The displacement reduction device according to any one of claims 1 to 6, characterized in that, The first output end is hinged to the first differential end via a straight beam type flexible hinge; And / or, the differential output terminal is hinged to the displacement output terminal via a straight beam type flexible hinge.

8. A drive system, characterized in that, The drive system includes: The displacement reduction device as described in any one of claims 1 to 7; and A piezoelectric element is disposed on the side of the input element opposite to the first displacement input end and the second displacement input end.

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