Piezoelectric ceramic motor and replaceable driving module for piezoelectric ceramic motor

Abstract

The invention provides a piezoelectric ceramic motor and a replaceable driving module used for the piezoelectric ceramic motor. The replaceable driving module comprises a module base body, the piezoelectric ceramic element is mounted on the module base body; the motion conversion mechanism is coupled with the piezoelectric ceramic element and used for converting deformation of the piezoelectric ceramic element into macroscopic motion; the driving feet are arranged on the motion conversion mechanism and used for outputting driving force to an external load; the module base body is provided with a standardized mechanical interface and an electric connection interface which are detachably connected with the piezoelectric ceramic motor main body; the standardized mechanical interface is used for accurately positioning and fixing the replaceable driving module at a preset mounting position of the piezoelectric ceramic motor main body; and the electric connection interface is used for automatically establishing electric connection with a corresponding interface on the piezoelectric ceramic motor main body when the replaceable driving module is installed in place so as to supply power to the piezoelectric ceramic element. According to the invention, the driving core can be quickly inserted, pulled and replaced, and the maintenance cost and downtime are remarkably reduced.

Description

Technical Field

[0001] This invention relates to the field of piezoelectric ceramic motor technology, and in particular to a piezoelectric ceramic motor and a replaceable drive module for the piezoelectric ceramic motor. Background Technology

[0002] Traditional piezoelectric ceramic motors typically integrate the core power-generating components—including the piezoelectric ceramic element, the vibrating body (such as an oscillator or flexible hinge) for amplifying and transmitting micro-vibrations, and the frictional contact parts that ultimately output power—with the motor's fixed housing or stator through rigid connections, adhesives, or welding, forming an inseparable whole. While this integrated design offers strong structural stability, it also presents a major pain point that has long plagued the industry: extremely high maintenance costs and very poor flexibility.

[0003] After long-term operation, the core drive components of a motor inevitably experience wear, aging, or even failure. For example, friction plates may wear down or piezoelectric ceramic elements may degrade in performance. In traditional integrated structures, repairing or replacing these vulnerable components is almost equivalent to replacing the entire motor. This not only leads to high spare parts costs but also causes significant losses due to equipment downtime. To address this problem, existing technologies have attempted some localized improvements, such as designing more easily removable housings or trying to access and replace friction plates from the outside. However, these methods fail to address the root cause of the problem because they still cannot solve the issue of the deep coupling and difficulty in separating the drive core (piezoelectric ceramics and vibration transmission mechanism) from the motor body. Existing repair solutions either severely degrade performance by disrupting the original precision preload and alignment or become impractical due to excessive structural complexity, ultimately leading back to the most primitive and expensive solution: replacing the entire motor. Summary of the Invention

[0004] Therefore, the technical problem to be solved by the present invention is to overcome the technical defects of the existing technology in which the piezoelectric ceramic motor drive core and the main body are fixedly integrated, which requires the whole body to be replaced during maintenance, resulting in high cost and inability to flexibly adapt to different performance requirements. The present invention provides a piezoelectric ceramic motor and a replaceable drive module for the piezoelectric ceramic motor, which can realize the quick plug-and-play replacement of the drive core, significantly reduce maintenance costs and downtime, and allow the motor output characteristics to be flexibly adjusted by replacing the standardized module. At the same time, it is conducive to the standardized mass production of core components.

[0005] To address the aforementioned technical problems, this invention provides a replaceable drive module for a piezoelectric ceramic motor, comprising: Module base; Piezoelectric ceramic elements are mounted on the module substrate; A motion conversion mechanism, coupled to the piezoelectric ceramic element, is used to convert the deformation of the piezoelectric ceramic element into macroscopic motion; A driving foot, mounted on the motion conversion mechanism, is used to output driving force to an external load; The module base is provided with standardized mechanical and electrical interfaces for detachable connection with the piezoelectric ceramic motor body. The standardized mechanical interface is used to precisely position and fix the replaceable drive module to the preset installation position of the piezoelectric ceramic motor body; The electrical connection interface is used to automatically establish an electrical connection with the corresponding interface on the piezoelectric ceramic motor body when the replaceable drive module is installed in place, so as to supply power to the piezoelectric ceramic element.

[0006] In one embodiment of the invention, a pre-pressure adjustment mechanism is further included, which is configured to adjust the position of the drive foot relative to the module base or the pre-tightening state of the drive foot output driving force.

[0007] In one embodiment of the present invention, the preload adjustment mechanism includes an adjustment screw that is operably applied to the motion conversion mechanism to adjust the preload state of the drive foot by changing the deformation of the motion conversion mechanism.

[0008] In one embodiment of the present invention, the adjusting screw has a predetermined thread pitch, the structural stiffness of the motion conversion mechanism at the point of action of the adjusting screw is predetermined, the rotation angle of the adjusting screw is obtained when the adjusting screw is rotated, and the adjustment amount of the preload of the driving foot is determined according to the correspondence between the thread pitch, the structural stiffness and the rotation angle.

[0009] In one embodiment of the present invention, the preload adjustment mechanism includes an adjustment set screw that can abut against the drive foot or the motion conversion mechanism, and the preload of the drive foot can be directly or indirectly adjusted by adjusting the extension amount of the adjustment set screw.

[0010] In one embodiment of the present invention, the motion conversion mechanism is a frictionless elastic hinge, and the piezoelectric ceramic element is pre-tightly installed in the elastic hinge.

[0011] In one embodiment of the present invention, the motion conversion mechanism includes a base portion and an execution portion integrally connected by a flexible connection portion, the piezoelectric ceramic element and the drive foot are respectively disposed on the execution portion, and the base portion is fixed to the module base.

[0012] In one embodiment of the invention, a wedge block is further included for fixing and pre-tightening the motion conversion mechanism, the wedge block being constrained between the module base and the base portion of the motion conversion mechanism. To solve the above-mentioned technical problems, the present invention provides a piezoelectric ceramic motor, including a motor body and at least one of the above-mentioned replaceable drive modules. The motor body is provided with a docking structure that matches the standardized mechanical interface and the electrical connection interface for detachably installing the replaceable drive module.

[0013] In one embodiment of the present invention, the standardized mechanical interface includes at least one positioning element and at least one guide element, which cooperate with corresponding structures on the piezoelectric ceramic motor body to achieve guidance and final positioning during the insertion and removal process; the electrical connection interface includes an elastic contact-type electrical connector disposed on the motor body and electrodes disposed on the replaceable drive module.

[0014] The technical solution of the present invention has the following advantages compared with the prior art: The replaceable drive module for piezoelectric ceramic motors described in this invention integrates the piezoelectric ceramic element, motion conversion mechanism, and drive foot into a single independent module substrate. Two key interfaces are designed for this module: a standardized mechanical interface for precise positioning and locking, and an electrical connection interface for automatic switching between power on and power off. The direct effect of this design is that the drive function is completely encapsulated into an independent unit with standardized installation dimensions and connection specifications.

[0015] From a theoretical perspective, the standardized mechanical interface ensures that the module can be repeatedly and precisely installed into the preset position on the motor body. This replaces the positioning achieved through permanent connections such as bonding and interference fits in traditional processes, allowing the module to completely replicate the initial design's alignment and contact geometry even after replacement, guaranteeing the stability and repeatability of power transmission. Simultaneously, the electrical connection interface automatically establishes an electrical path during module insertion, eliminating the need for any welding or screw pressing operations. This physically enables rapid and reliable connection and disconnection between the drive unit and the power supply circuit. Attached Figure Description

[0016] To make the content of this invention easier to understand, the invention will be further described in detail below with reference to specific embodiments and accompanying drawings, wherein: Figure 1 This is a schematic diagram of the overall structure of the piezoelectric ceramic motor of the present invention; Figure 2 This is a schematic diagram of the structure of the piezoelectric ceramic motor of the present invention after the replaceable drive module is disassembled; Figure 3This is a schematic diagram of the first embodiment of the replaceable drive module for a piezoelectric ceramic motor of the present invention; Figure 4 This is a cross-sectional structural schematic diagram of the first embodiment of the replaceable drive module for a piezoelectric ceramic motor of the present invention; Figure 5 This is a schematic diagram of the second embodiment of the replaceable drive module for a piezoelectric ceramic motor of the present invention; Figure 6 This is a cross-sectional structural schematic diagram of a second embodiment of the replaceable drive module for a piezoelectric ceramic motor according to the present invention.

[0017] Explanation of reference numerals in the accompanying drawings: 100, base; 101, positioning block; 102, guide hole; 103, spring connector; 104, locking screw; 200, movable platform; 300, replaceable drive module; 301, module base; 302, piezoelectric ceramic element; 303, elastic hinge; 304, drive foot; 305, locking set screw; 306, hinge base; 307, positioning pin; 308, guide groove; 309, electrode; 310, adjusting set screw; 311, flexible mechanism; 312, fixing screw; 313, screw washer; 314, wedge block; 315, adjusting screw; 316, wiring groove. Detailed Implementation

[0018] The present invention will be further described below with reference to the accompanying drawings and specific embodiments, so that those skilled in the art can better understand and implement the present invention. However, the embodiments described are not intended to limit the present invention.

[0019] Reference Figure 1 and Figure 2 As shown, the present invention discloses a piezoelectric ceramic motor, including a motor body. The motor body includes a base 100, a movable platform 200 disposed on the base 100, and a detachable replaceable drive module 300. The motor body is provided with a docking structure that matches the replaceable drive module 300, namely a positioning block 101 and a guide hole 102 disposed on the base 100 for mechanical connection with the replaceable drive module 300, and a spring-type connector 103 disposed on the base 100 for electrical connection with the replaceable drive module 300.

[0020] Specifically, the replaceable drive module 300 for a piezoelectric ceramic motor of the present invention integrates the core components for generating driving force—the piezoelectric ceramic element 302, the motion conversion mechanism, and the drive foot 304—on a separate module base 301, forming a fully functional unit. The piezoelectric ceramic element 302 is mounted on the module base 301; the motion conversion mechanism is coupled to the piezoelectric ceramic element 302 to convert the deformation of the piezoelectric ceramic element 302 into macroscopic motion; and the drive foot 304 is mounted on the motion conversion mechanism to output driving force to an external load. A key design feature of the module base 301 is its standardized mechanical and electrical connection interfaces: the standardized mechanical interface allows the replaceable drive module 300 to be precisely positioned and fixed at a preset installation position on the piezoelectric ceramic motor body; the electrical connection interface automatically establishes an electrical connection with the corresponding interface on the piezoelectric ceramic motor body when the replaceable drive module 300 is installed, supplying power to the piezoelectric ceramic element 302.

[0021] During implementation, the operator aligns the module with its standardized mechanical interface and inserts it into the pre-set, precisely matching positioning block 101 and guide hole 102 on the motor body. This process automatically guides the module to the only correct installation position and achieves precise positioning. It can then be finally secured using simple methods such as locking screws 104. Simultaneously, the electrical connection interface located on the side of the module automatically engages with the spring-loaded electrical connector fixed to the motor body upon insertion, instantly establishing a reliable electrical path to power the piezoelectric ceramic element 302.

[0022] A complete "plug-and-play" replacement mechanism is formed by standardizing mechanical interfaces and electrical connection interfaces. The technical means is to solidify the complex precision assembly relationship in the standardized interface, which simplifies the operation and ensures the accuracy of repeated assembly, thereby fundamentally solving the problems of difficult and costly maintenance of traditional motors.

[0023] When the drive section of the replaceable drive module 300 fails, maintenance is simplified from "complete motor replacement" requiring specialized tools and calibration processes to "direct plug-and-play replacement" of the standardized module. This significantly reduces spare parts costs (only the module needs to be replaced, not the entire machine) and greatly shortens maintenance time and reliance on specialized skills. Secondly, this design provides the system with high configurability and flexibility. Due to the standardization of mechanical and electrical interfaces, the same motor body can be adapted to various drive modules with different internal parameters (such as piezoelectric ceramic type, mechanical stiffness, and friction material). Users can quickly replace the module with a dedicated module emphasizing high speed, high thrust, or high precision according to actual application needs, achieving diversified applications of a single motor platform and improving equipment utilization and economy. Finally, the standardization of the module creates conditions for independent mass production of core functional components. Drive modules can be manufactured and tested professionally, independent of specific motor models, which helps improve product consistency and quality control, and reduces unit costs through large-scale production.

[0024] Reference Figure 3 and Figure 4 As shown, this embodiment provides a replaceable drive module 300 for a piezoelectric ceramic motor. Its core is to realize the independence, standardization and quick replacement of the drive core. The replaceable drive module 300 mainly includes a module base 301 (or shell), a piezoelectric ceramic element 302, an elastic hinge 303 as a motion conversion mechanism, a drive foot 304 (or friction plate), and a standardized interface for realizing the connection function.

[0025] Specifically, the module base 301 forms a rectangular independent shell, serving as the load-bearing frame for the entire module. Inside the module base 301, a core driving component is installed. The motion conversion mechanism is specifically implemented as a frictionless elastic hinge 303, which is fixedly mounted on a hinge base 306 inside the module base 301 via a locking screw 305. A precision groove is provided inside the hinge, and the piezoelectric ceramic element 302 is securely mounted and clamped within this groove by applying a preload. When a high-frequency alternating voltage is applied to the piezoelectric ceramic element 302 through electrodes, it generates precise and rapid micro-amplitude expansion and contraction deformation. The driving foot 304 (i.e., the friction plate) is directly fixedly mounted on the output end of the elastic hinge 303. The elastic hinge 303 amplifies and converts the micro-expansion and contraction deformation of the piezoelectric ceramic into macroscopic linear vibration of the driving foot 304 in a specific direction (such as the front-to-back direction) through its own leverage and elastic recovery, thereby driving the load movement through friction with the external guide rail.

[0026] To achieve "plug-and-play" functionality, this embodiment integrates standardized mechanical and electrical interfaces on the module base 301. The standardized mechanical interface includes two high-hardness cylindrical positioning pins 307 on both sides of the module and a guide groove 308 on one side of the module's bottom. During installation, the two positioning pins 307 engage with corresponding guide holes 102 on the motor body frame, while the guide groove 308 engages with positioning blocks 101 on the main body, ensuring the module slides in along a predetermined path and is ultimately positioned precisely and repeatably in the correct location. This solves the problem of difficulty in replicating assembly accuracy after disassembly using traditional methods. The electrical connection interface is specifically implemented as follows: electrodes 309 are provided on the side of the module and connected to a piezoelectric ceramic element 302 via internal wires; a flexible spring-loaded connector 103 is installed at a corresponding position on the motor body. When the module is inserted into the main body, the electrodes 309 on the module automatically engage with the spring-loaded connector 103, instantly establishing a reliable electrical connection; when removed, the connection is automatically disconnected, eliminating the need for any manual wiring operations and greatly simplifying the replacement process.

[0027] In addition, this embodiment also integrates a pre-pressure adjustment mechanism to optimize drive performance. In specific implementation, the pre-pressure adjustment mechanism allows for fine-tuning of the drive performance after the module is installed on the motor body. This is because even if the module is precisely installed, the optimal contact pressure between the drive foot 304 and the motor load rail (or rotor) may need to be adjusted due to manufacturing tolerances or wear. Furthermore, in actual use, it is also necessary to adjust the output thrust of the motor.

[0028] In this embodiment, the preload adjustment mechanism is specifically an adjusting screw 310. After the module is installed in place, this adjusting screw 310 can be screwed to make its end directly or indirectly abut against and act on the relevant parts of the drive foot 304 or the elastic hinge 303. By finely adjusting the extension of the adjusting screw 310, the contact pressure (i.e., preload) between the drive foot 304 and the external load guide rail can be finely adjusted, thereby adjusting the output thrust of the motor according to actual needs. This direct external adjustment method provides users with a convenient means of fine-tuning performance.

[0029] In this embodiment, to achieve quantitative adjustment of the output thrust, the adjusting screw is configured with a predetermined thread pitch, and an adjusting screw with a specific, known pitch is selected. After the module is assembled, the stiffness K of the motion conversion mechanism along the screw axis at the point of application of the adjusting screw is measured using a calibration device. Specifically, a precision force gauge is used to push the adjusting screw (or an alternative tooling) to apply a series of known forces Fi to the motion conversion mechanism, while a displacement sensor measures the displacement Xi corresponding to the point of application. Through data fitting (such as the least squares method), the equivalent stiffness K = ΔF / ΔX (unit: N / μm or N / mm) at the point of application is calculated. This stiffness value K will be recorded as a key parameter of this specific module.

[0030] The rotation angle of the adjusting screw is obtained when the adjusting screw is rotated, and the adjustment amount of the drive foot preload is determined according to the correspondence between the thread pitch, the structural stiffness and the rotation angle, and the following steps are performed: 1. Establish the correspondence between rotation angle and axial displacement: The rotational motion of the adjusting screw is converted into axial linear motion through the threaded joint. According to the principle of threaded transmission, the axial feed of the adjusting screw for one revolution (360°) is equal to the pitch P. Therefore, the relationship between the rotation angle θ (in degrees) and the change in axial displacement ΔX is as follows: ΔX = (P / 360°) * θ; For example, for a screw with a pitch P=0.5mm, the axial displacement is approximately 1.39 micrometers for every 1° rotation.

[0031] 2. Establish the correspondence between axial displacement and preload changes: Since the stiffness K of the motion conversion mechanism at the point of application has been predetermined, and it is assumed that it operates within the linear elastic range within the adjustment range, according to Hooke's Law, the change in force ΔF acting on the mechanism caused by the change in axial displacement ΔX (this force is ultimately transmitted as the preload of the driving foot) is: ΔF = K * ΔX; This relationship indicates that the adjustment amount of the preload is proportional to the displacement, and the proportionality coefficient is the stiffness K.

[0032] 3. Establish a direct correspondence between the rotation angle and the preload adjustment amount and perform the adjustment: Combining the above two relationships, a definite functional relationship is obtained between the rotation angle θ of the adjusting screw and the preload adjustment amount ΔF of the drive foot: ΔF = K * (P / 360°) * θ; This implementation upgrades the original "fine-tuning" that relied on experience and intuition to quantitative precision adjustment based on clear physical relationships and known parameters. This not only significantly improves the accuracy, repeatability, and efficiency of the adjustment, but also ensures the consistency of performance between different modules of the same model, and lays a direct technical foundation for realizing programmed, automated closed-loop control of preload.

[0033] In this embodiment, the elastic hinge 303, piezoelectric ceramic, and drive foot 304 are integrated into an independent module base 301 with a standard interface, forming a complete and quick-pluggable functional unit. When the module wears out or different performance is required, simply loosen the locking screw 104, remove the old module, replace it with the new module, and re-lock it; the entire motor body does not need to be replaced.

[0034] Reference Figure 5 and Figure 6 As shown, this embodiment provides another specific implementation of the replaceable drive module 300, which has different designs in terms of motion conversion mechanism, internal fixation and pre-pressure adjustment method. This module also includes a module base 301, a piezoelectric ceramic element 302, a motion conversion mechanism, a drive foot 304 (friction plate) and a standardized interface.

[0035] In this embodiment, the motion conversion mechanism is specifically implemented as an integral flexible mechanism 311 including a flexible connecting part. The flexible mechanism 311 is integrally formed by machining. Its structure includes a base part and an execution part that are integrally connected. The piezoelectric ceramic element 302 and the driving foot 304 (friction plate) are respectively installed in specific grooves on the execution part of the flexible mechanism 311. The base part is connected to the module base 301 by fixing screws 312 and screw washers 313.

[0036] To further enhance the stability of the fixation and apply initial preload, this embodiment employs a wedge block 314. This wedge block 314 is inserted into the inclined gap between the module base 301 and the base of the flexible mechanism 311. One end of the wedge block 314 has its vertical surface in close contact with the module base 301, while the inclined surface of the other end is in close contact with the corresponding inclined surface of the base of the flexible mechanism 311. By striking or pressing the wedge block 314, the self-locking and squeezing action generated by its inclined surface firmly locks the base of the flexible mechanism 311 onto the module base 301. Simultaneously, this process also causes a certain initial elastic deformation in the flexible mechanism 311, providing the necessary preload for the piezoelectric ceramic element 302. This is a key technical means to achieve stable installation and efficient energy transfer of the mechanism.

[0037] The standardized interface design of this embodiment is similar to that of the one described above. The module base 301 is provided with two symmetrical positioning pins 307 and a guide groove 308 for quick and accurate positioning with the motor body. The module base 301 is provided with an electrode 309 and a wiring groove 316. The wires of the piezoelectric ceramic pass through the wiring groove 316 and are connected to the electrode 309. The motor body is provided with a corresponding elastic spring connector 103 to realize plug-in and plug-out power supply.

[0038] Regarding pre-pressure adjustment, this embodiment employs another technical means. Specifically, the pre-pressure adjustment mechanism is an adjusting screw 315. This screw 315 passes through a threaded hole in the module base 301, and its head contacts a specific position at the bottom of the actuator of the flexible mechanism 311. By tightening this adjusting screw 315, a controllable thrust can be applied to the actuator of the flexible mechanism 311. This thrust causes a slight elastic deformation of the entire actuator, including the drive foot 304, thereby changing the position of the drive foot 304 in the vertical direction and adjusting its contact pressure with the external load guide rail. This method of adjusting pre-pressure by causing controllable deformation of the motion conversion mechanism itself is an internal, indirect, but very precise adjustment method.

[0039] Although the two pre-pressure adjustment mechanisms mentioned above have different points of action, they both achieve the technical effect of dynamically and conveniently optimizing the contact state of the drive interface outside the module by introducing a precisely controllable mechanical adjustment element. This allows the same module to adapt to different load conditions or performance requirements, improving the system's adaptability and performance consistency.

[0040] This embodiment demonstrates that, under the same modular and standardized interface concept, the core functions of the replaceable drive module 300 can be achieved by employing different internal mechanical structures (an integral flexible mechanism 311 replacing discrete hinges) and different preload adjustment mechanisms (internal deformation adjustment replacing external push rod adjustment). Users can select different types of drive modules according to their different requirements for thrust, stiffness, size, or cost, and plug them into the same standard motor body for use.

[0041] Obviously, the above embodiments are merely examples to clearly illustrate the technical solution of the present invention and are not intended to limit the implementation. For those skilled in the art, other variations or modifications can be made based on the above description, such as using other forms of elastic motion conversion mechanisms or combining different pre-pressure adjustment methods. Any modifications, equivalent substitutions, and improvements within the spirit and principles of the claims of this invention should be included within the scope of protection of this invention.

[0042] Obviously, the above embodiments are merely illustrative examples for clear explanation and are not intended to limit the implementation. Those skilled in the art will recognize that other variations or modifications can be made based on the above description. It is neither necessary nor possible to exhaustively list all possible implementations here. However, obvious variations or modifications derived therefrom are still within the scope of protection of this invention.

Claims

1. A replaceable drive module for a piezoelectric ceramic motor, characterized in that, include: Module base; Piezoelectric ceramic elements are mounted on the module substrate; A motion conversion mechanism, coupled to the piezoelectric ceramic element, is used to convert the deformation of the piezoelectric ceramic element into macroscopic motion; A driving foot, mounted on the motion conversion mechanism, is used to output driving force to an external load; The module base is provided with standardized mechanical and electrical interfaces for detachable connection with the piezoelectric ceramic motor body. The standardized mechanical interface is used to precisely position and fix the replaceable drive module to the preset installation position of the piezoelectric ceramic motor body; The electrical connection interface is used to automatically establish an electrical connection with the corresponding interface on the piezoelectric ceramic motor body when the replaceable drive module is installed in place, so as to supply power to the piezoelectric ceramic element.

2. The replaceable drive module for a piezoelectric ceramic motor according to claim 1, characterized in that: It also includes a pre-pressure adjustment mechanism, which is configured to adjust the position of the drive foot relative to the module base or the pre-tightening state of the drive foot's output driving force.

3. The replaceable drive module for a piezoelectric ceramic motor according to claim 2, characterized in that: The preload adjustment mechanism includes an adjustment screw that is operablely applied to the motion conversion mechanism to adjust the preload state of the drive foot by changing the deformation of the motion conversion mechanism.

4. The replaceable drive module for a piezoelectric ceramic motor according to claim 3, characterized in that: The adjusting screw has a predetermined thread pitch. The structural stiffness of the motion conversion mechanism at the point of action of the adjusting screw is predetermined. When the adjusting screw is rotated, the rotation angle of the adjusting screw is obtained. Based on the correspondence between the thread pitch, the structural stiffness and the rotation angle, the adjustment amount of the preload of the driving foot is determined.

5. The replaceable drive module for a piezoelectric ceramic motor according to claim 2, characterized in that: The preload adjustment mechanism includes an adjustment set screw that can abut against the drive foot or the motion conversion mechanism, and the preload of the drive foot can be directly or indirectly adjusted by adjusting the extension amount of the adjustment set screw.

6. The replaceable drive module for a piezoelectric ceramic motor according to claim 1, characterized in that: The motion conversion mechanism is a frictionless elastic hinge, and the piezoelectric ceramic element is pre-tightly installed within the elastic hinge.

7. The replaceable drive module for a piezoelectric ceramic motor according to claim 1, characterized in that: The motion conversion mechanism includes a base and an actuator integrally connected by a flexible connection. The piezoelectric ceramic element and the drive foot are respectively disposed on the actuator, and the base is fixed to the module base.

8. The replaceable drive module for a piezoelectric ceramic motor according to claim 7, characterized in that: It also includes a wedge block for fixing and pre-tightening the motion conversion mechanism, the wedge block being constrained between the module base and the base portion of the motion conversion mechanism.

9. A piezoelectric ceramic motor, characterized in that, The device includes a motor body and at least one replaceable drive module as described in any one of claims 1 to 8. The motor body is provided with a docking structure that matches the standardized mechanical interface and the electrical connection interface for detachably installing the replaceable drive module.

10. The piezoelectric ceramic motor according to claim 9, characterized in that: The standardized mechanical interface includes at least one positioning element and at least one guide element, which cooperate with the corresponding structure on the piezoelectric ceramic motor body to achieve guidance and final positioning during the insertion and removal process; The electrical connection interface includes a flexible contact-type electrical connector disposed on the motor body and electrodes disposed on the replaceable drive module.

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