Driving device of linear ultrasonic motor

Abstract

The utility model discloses a driving device of a linear ultrasonic motor. The driving device comprises a bottom plate; the movable plate is located on the bottom plate, is connected with the bottom plate through a sliding rail and can move relative to the bottom plate along the sliding rail; the stop block is located on the moving plate and used for being in contact with one side of the vibrator module; the clamping module is located on the bottom plate, and one end of the clamping module is connected with the check block so as to adjust the pre-pressure provided by the check block to the vibrator module; the sliding block is located on the bottom plate, the movable plate is located between the clamping module and the sliding block, and one side of the sliding block makes contact with the other side of the vibrator module; wherein the moving direction of the sliding block is perpendicular to the moving direction of the moving plate, the vibrator module is located on the moving plate, the clamping module adjusts the position of the check block so that the other side of the vibrator module can make contact with the sliding block, the vibrator module drives the sliding block to move through the friction force between the vibrator module and the sliding block, and the pre-pressure can be conveniently and visually adjusted; therefore, the pre-pressure value corresponding to the optimal output performance is obtained, and the development period of the oscillator module is shortened.

Description

Technical Field

[0001] The utility model relates to the technical field of motor testing, and more specifically, to a driving device for a linear ultrasonic motor. Background Art

[0002] Piezoelectric linear motors offer advantages such as high positioning accuracy, fast response, flexible design, and immunity to electromagnetic interference, holding broad application prospects in emerging cutting-edge technologies. Originating in the 1980s, piezoelectric linear motors utilize the inverse piezoelectric effect of piezoelectric materials to induce micro-vibrations in the substrate, which are then accumulated through friction to achieve high-resolution and long-range displacement output.

[0003] Because piezoelectric linear motors are driven by friction, the contact between the vibrator module and the object it contacts determines, to a certain extent, whether the module's micro-vibrations can be effectively transmitted. Parameters that must be met include, but are not limited to, the relative force between the vibrator module and the object; the linear frictional contact between the vibrator module and the object; and the hardness difference between the two objects.

[0004] To more efficiently develop piezoelectric linear motors with improved performance, appropriate equipment is required to test the performance of piezoelectric linear motor vibrator modules. The piezoelectric linear ultrasonic motor drive is a key device for evaluating and verifying the performance of piezoelectric linear motor vibrator modules. This drive allows for better analysis of the impact of various contact parameters on vibrator module performance.

[0005] Therefore, there is an urgent need to design a driving device for a linear ultrasonic motor to meet the needs of vibrator module development and testing. Utility Model Content

[0006] The purpose of the utility model is to provide a driving device for a linear ultrasonic motor, so as to solve the problem that the existing driving device for a linear ultrasonic motor is difficult to meet the requirements of the development and testing of a vibrator module.

[0007] 7. The swiftly and minutely adjusting device for a wood-planer working table as claimed in claim 1, wherein said linking rod and said adjusting base are pivotally connected to each other with a bolt, and said bolt has a round shank to contact with said linking rod. said linking rod is pivotally connected to said linking rod. said linking rod is pivotally connected to said linking rod.

[0008] Optionally, the clamping module includes a push rod and a micrometer, one end of the push rod is connected to the stop block, and the extended length of the push rod can be adjusted by the micrometer.

[0009] Optionally, the clamping module further includes a pressure sensor, which is located between the push rod and the micrometer, and is used to detect the force of the block on the stator of the DC motor.

[0010] Optionally, the clamping module further includes an automatic adjustment device, which dynamically adjusts the position of the movable plate according to data from the pressure sensor.

[0011] Optionally, the slide rails include two slide rails, the two slide rails are parallel to each other, and the slide rails further include slide rail adjustment blocks to adjust the gap between the slide rails.

[0012] Optionally, a fixing device is further included, and the movable plate is connected to the vibrator module through the fixing device. The fixing device has an upper clamping plate and a lower clamping plate, and the lower clamping plate is connected to the movable plate. The vibrator module is located between the upper clamping plate and the lower clamping plate, and the upper clamping plate and the lower clamping plate are connected by bolts.

[0013] Optionally, both the upper clamping plate and the lower clamping plate include positioning pins pointing toward the vibrator module, and the positioning pins match with positioning holes of the vibrator module to position the vibrator module.

[0014] Optionally, the fixing device further comprises a pressing block, the pressing block is located on the upper clamping plate, and windows for the connecting piece of the vibrator module to pass through are provided in the pressing block and the upper clamping plate.

[0015] Optionally, a base is provided on the bottom plate, and the slider is located on the base.

[0016] Optionally, the cross-section of the base is convex, and the cross-section of the slider is concave matching the cross-section of the base.

[0017] Optionally, a friction structure is further provided on the contact surface between the slider and the vibrator module to increase the friction force between the slider and the vibrator module.

[0018] Optionally, a friction structure is further provided on the contact surface between the slider and the vibrator module to reduce friction between the slider and the vibrator module.

[0019] The above-mentioned driving device of the linear ultrasonic motor can be used for testing the vibrator module of the linear ultrasonic motor.

[0020] The driving device of the linear ultrasonic motor provided by the utility model is configured by setting a vibrator module on a movable plate, with one side of the vibrator module corresponding to a stopper and the other side corresponding to a slider. The position of the stopper can be adjusted by a clamping module, and the stopper provides pre-pressure to the vibrator module for driving or testing.

[0021] Furthermore, the clamping module also has a pressure sensor and an automatic adjustment device, which can detect the size of the pre-pressure and adjust the position of the movable plate in real time according to the size of the pre-pressure feedback from the pressure sensor through the automatic adjustment device, thereby realizing dynamic adjustment of the pre-pressure and ensuring that the size of the pre-pressure between the vibrator module and the slider is constant.

[0022] The driving device of the linear ultrasonic motor can adjust the preload pressure conveniently and intuitively, thereby obtaining the preload pressure value corresponding to the optimal output performance of the vibrator module, improving the research and testing efficiency of the vibrator module performance, and shortening the development cycle of the vibrator module.

[0023] Furthermore, when the driving device operates normally, the vibrator module is stationary relative to the base plate, and the vibrator module drives the slider to move, which is suitable for application scenarios where the vibrator module needs to be stationary.

[0024] Furthermore, the contact surface between the slider and the vibrator module is provided with a friction structure to adjust the friction between the slider and the vibrator module, for example, to increase or decrease the friction between the slider and the vibrator module. Preferably, the friction structure reduces the friction between the slider and the vibrator module, thereby increasing the number of operations of the linear ultrasonic motor drive device. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] The above and other objects, features and advantages of the present invention will become more apparent through the following description of the embodiments of the present invention with reference to the accompanying drawings.

[0026] Figure 1 A top view of a driving device for a linear ultrasonic motor according to a first embodiment of the present invention is shown;

[0027] Figure 2 A side view of a driving device for a linear ultrasonic motor according to a first embodiment of the present invention is shown;

[0028] Figure 3 A cross-sectional view of a driving device for a linear ultrasonic motor according to a first embodiment of the present invention is shown;

[0029] Figure 4 A perspective schematic diagram of a driving device for a linear ultrasonic motor according to a first embodiment of the present invention is shown;

[0030] Figure 5 A three-dimensional schematic diagram of a driving device for a linear ultrasonic motor according to a second embodiment of the present invention is shown. DETAILED DESCRIPTION

[0031] The present invention will be described in more detail below with reference to the accompanying drawings. In each of the accompanying drawings, identical elements are represented by similar reference numerals. For the sake of clarity, the various parts in the accompanying drawings are not drawn to scale. In addition, some well-known parts may not be shown.

[0032] It should be understood that when describing a structure, when a component or region is referred to as being "on" or "over" another component or region, it may mean that it is directly above the other component or region, or that other components or regions are included between it and the other component or region. Furthermore, if the part is turned over, the component or region will be located "below" or "beneath" the other component or region.

[0033] If it is intended to describe a situation where a component or region is directly on top of another component or region, this document will use the expressions “directly on” or “on top of and adjacent to”.

[0034] Many specific details of some embodiments of the present invention are described below, such as component structures, materials, dimensions, processing techniques, and technologies, to provide a clearer understanding of the present invention. However, as those skilled in the art will appreciate, the present invention may be implemented without following these specific details.

[0035] The present invention may be embodied in various forms, some examples of which will be described below.

[0036] Figure 1The figure shows a top view of a driving device for a linear ultrasonic motor according to a first embodiment of the present invention. The driving device for the linear ultrasonic motor includes: a base plate 110, a movable plate 120, a clamping module 130, a stopper 140, and a slider 150. The base plate 110 is, for example, rectangular. A clamping module 130 is provided at one edge of the base plate 110. The clamping module 130 includes a micrometer head 131, a pressure sensor 132, a sensor stopper 133, and a push rod 134. The micrometer head 131 is connected to the push rod 134. The extension length of the push rod 134 can be adjusted by rotating the micrometer head 131. The push rod 134 is provided with a stopper 140 at one end away from the micrometer head 131, which contacts the vibrator module. Specifically, the push rod 134 is, for example, Y-shaped, with its bifurcated end facing the vibrator module and contacting the vibrator module's fixing device through two stops 140. A pressure sensor 132 is also provided between the micrometer head 131 and the push rod 134. The pressure sensor 132 is used to display the pre-pressure provided by the push rod 134 to the vibrator module 200. The pressure sensor 132 is located in the sensor limit block 133 to prevent the pressure sensor 132 and the push rod 134 from escaping from the sensor limit block 133. A movable plate 120 is also provided on the base plate 110. The movable plate 120 is located between the clamping module 130 and the slider 150. The movable plate 120 is used to carry the vibrator module 200, for example. The movable plate 120 is connected to the base plate 110 through a slide rail 121. The push rod 134 and the stop block 140 are both located above the movable plate 120. The vibrator module 200 is fixed by a fixing device and connected to the movable plate 120. The stop block 140 is in direct contact with the side of the fixing device. The Y-shaped push rod 134 can avoid the protruding driving foot in the middle of the vibrator module 200, thereby preventing the push rod 134 from contacting the driving foot and reducing the vibration of the adjustment module 130. The vibrator module 200 is pushed by the push rod 134, and the driving foot of the vibrator module 200 on the side away from the push rod 134 contacts the side of the slider 150. The slider 150 is located on the base plate 110. The vibrator module 200 is fixed by a fixing device and is pushed by the push rod 134, so that there is a preload between the driving foot of the vibrator module 200 on the side close to the slider 150 and the side of the slider 150. The driving foot of the vibrator module 200 on the side close to the slider 150 drives the slider 150 to move in a direction perpendicular to the preload through friction.

[0037] Furthermore, the contact surface between the slider 150 and the vibrator module 200 is further provided with a friction structure (not shown), which increases or decreases the friction between the slider 150 and the vibrator module 200. Preferably, by reducing the friction between the slider 150 and the vibrator module 200 through the friction structure, the operating frequency of the driving device can be increased.

[0038] Figure 2 The side view of the driving device of the linear ultrasonic motor of the first embodiment of the present invention is shown; Figure 2The upper and lower positional relationships of the various components can be seen in the figure. The sensor limit block 133 is located on the base plate 110. The base plate 110 is also provided with a slide rail adjustment block 122 corresponding to the slide rail 121. The slide rail adjustment block 122 can be used to adjust the gap of the slide rail 121 to avoid unnecessary shaking caused by excessive gap. The slide rail 121 is, for example, a cross-roller linear guide. The movable plate 120 is located above the slide rail 121 and the slide rail adjustment block 122. The base plate 110 is also provided with a base 151 at a position corresponding to the slider 150. Specifically, the cross-section of the slider 150 is an inverted concave shape, and the cross-section of the base 151 is a convex shape that matches it. The slider 150 can slide relative to the base 151 in a direction perpendicular to the pre-stress direction. As can be seen from this side view, the micrometer head 131, push rod 134, stopper 140, vibrator module 200, and slider 150 are all located in the same plane. The push rod 134 transmits preload to the vibrator module 200 through the stopper 140. The preload can be adjusted by rotating the micrometer head 131, thereby testing the performance of the vibrator module 200 under different preloads. Specifically, for example, the operating speed and thrust of the vibrator module 200 can be tested. The operating speed can be tested by capturing the image with a high-speed camera and then calculating the speed. The thrust is tested by attaching a weight to the slider 150, and the weight of the weight can be converted into thrust. The faster the vibrator module 200 runs, the smaller the thrust will be. It is necessary to find a suitable preload so that the operating speed and thrust of the vibrator module 200 reach appropriate values. The fixing device includes an upper clamping plate 210 and a lower clamping plate 220, which clamp and fix the vibrator module 200 from the upper and lower sides. The lower clamping plate 220 is connected to the movable plate 120, for example. Specifically, the lower clamping plate 220 is close to the side of the movable plate 120 away from the push rod 134. A pressure block 230 is also provided on the upper clamping plate 210. The connecting piece of the vibrator module 200 passes through the upper clamping plate 210 and the pressure block 230 and then comes out to be connected to the outside.

[0039] Figure 3 The driving device of the linear ultrasonic motor of the first embodiment of the utility model is shown along Figure 1 The cross-sectional view taken along the AA section line; Figure 3The figure shows more clearly how the vibrator module 200 is fixed. The upper clamping plate 210 and the lower clamping plate 220 of the fixing device both have a positioning pin 240 protruding toward the vibrator module 200. The top surface of the positioning pin 240 is, for example, a conical surface, and its conical surface is connected to the positioning hole of the vibrator module 200. The upper clamping plate 210 and the lower clamping plate 220 are connected by bolts 250. The vibrator module 200 is clamped and fixed by the upper clamping plate 210 and the lower clamping plate 220. A pressure block 230 is also provided above the upper clamping plate 210. The pressure block 230 and the upper clamping plate 210 are both provided with a window 211 for the connecting piece 201 of the vibrator module 200 to pass through. After passing through, the connecting piece 201 can be connected to an external driving power supply, thereby driving the vibrator module 200 to operate.

[0040] Figure 4 The schematic diagram of the driving device of the linear ultrasonic motor of the first embodiment of the present invention is shown. Figure 4 It can be seen that by rotating the micrometer head 131, the push rod 134 is extended or shortened, and the preload provided by the push rod 134 to the linear motor 200 is adjusted. The driving foot of the vibrator module 200 on the movable plate 120 close to the slider 150 contacts the side of the slider 150, and the slider 150 is driven by friction to move in a direction perpendicular to the preload force direction (the direction indicated by the arrow in the figure).

[0041] Figure 5 A schematic diagram of a linear ultrasonic motor drive device according to a second embodiment of the present invention is shown. The drive device of the linear ultrasonic motor according to the second embodiment is similar to that of the first embodiment, except that the clamping module 130 of the second embodiment further includes an automatic adjustment device 135 connected to the push rod 134. The automatic adjustment device 135 includes a single-chip microcomputer. When the vibrator module 200 is in operation, the preload between the vibrator module 200 and the slider 150 may change. In this case, the single-chip microcomputer in the automatic adjustment device 135 controls the motor in the automatic adjustment device 135 to move the push rod 134 based on the preload feedback from the pressure sensor 132 (the force exerted by the push rod 134 on the vibrator module 200), thereby adjusting the position of the vibrator module 200 and dynamically adjusting the preload, thereby achieving dynamic balance and ensuring a constant preload between the vibrator module 200 and the slider 150.

[0042] The driving device of the linear ultrasonic motor provided by the utility model is configured by setting a vibrator module on a movable plate, with one side of the vibrator module corresponding to a stopper and the other side corresponding to a slider. The position of the stopper can be adjusted by a clamping module, and the stopper provides pre-pressure to the vibrator module for driving or testing.

[0043] Furthermore, the clamping module also has a pressure sensor and an automatic adjustment device, which can detect the size of the pre-pressure and adjust the position of the movable plate in real time according to the size of the pre-pressure feedback from the pressure sensor through the automatic adjustment device, thereby realizing dynamic adjustment of the pre-pressure and ensuring that the size of the pre-pressure between the vibrator module and the slider is constant.

[0044] The driving device of the linear ultrasonic motor can adjust the preload pressure conveniently and intuitively, thereby obtaining the preload pressure value corresponding to the optimal output performance of the vibrator module, improving the research and testing efficiency of the vibrator module performance, and shortening the development cycle of the vibrator module.

[0045] Furthermore, when the driving device operates normally, the vibrator module is stationary relative to the base plate, and the vibrator module drives the slider to move, which is suitable for application scenarios where the vibrator module needs to be stationary.

[0046] Furthermore, the contact surface between the slider and the vibrator module is provided with a friction structure to adjust the friction between the slider and the vibrator module, for example, to increase or decrease the friction between the slider and the vibrator module. Preferably, the friction structure reduces the friction between the slider and the vibrator module, thereby increasing the number of operations of the linear ultrasonic motor drive device.

[0047] In the above description, technical details such as the position combination and connection method of each component are not described in detail. However, those skilled in the art will understand that various technical means can be used to form the required connection relationship, etc. In addition, in order to achieve the same function, those skilled in the art may also design a structure that is not exactly the same as the structure described above. In addition, although each embodiment is described separately above, this does not mean that the measures in each embodiment cannot be used in combination to advantage.

[0048] The above describes embodiments of the present invention. However, these embodiments are for illustrative purposes only and are not intended to limit the scope of the present invention. The scope of the present invention is defined by the appended claims and their equivalents. Those skilled in the art may make various substitutions and modifications without departing from the scope of the present invention, and such substitutions and modifications are intended to fall within the scope of the present invention.

Claims

1. A driving device for a linear ultrasonic motor, characterized in that: include: base plate; A movable plate is located on the bottom plate, the movable plate is connected to the bottom plate via a slide rail, and the movable plate can move relative to the bottom plate along the slide rail; a stopper, located on the movable plate, and configured to contact one side of the vibrator module; a clamping module, located on the bottom plate, one end of the clamping module being connected to the stopper to adjust the pre-pressure provided by the stopper to the vibrator module; a slider located on the bottom plate, the movable plate located between the clamping module and the slider, and one side of the slider in contact with the other side of the vibrator module; The moving direction of the slider is perpendicular to the moving direction of the movable plate, the vibrator module is located on the movable plate, the clamping module adjusts the position of the block so that the other side of the vibrator module contacts the slider, and the vibrator module drives the slider to move by using the friction between the vibrator module and the slider.

2. The driving device of the linear ultrasonic motor according to claim 1, characterized in that: The clamping module includes a push rod and a micrometer head. One end of the push rod is connected to the stop block, and the extended length of the push rod can be adjusted by the micrometer head.

3. The driving device of the linear ultrasonic motor according to claim 2, characterized in that: The clamping module further includes a pressure sensor, which is located between the push rod and the micrometer head. The pressure sensor is used to detect the force of the block on the stator of the DC motor.

4. The driving device of the linear ultrasonic motor according to claim 3, characterized in that: The clamping module further includes an automatic adjustment device, which dynamically adjusts the position of the movable plate according to data from the pressure sensor.

5. The driving device of the linear ultrasonic motor according to claim 1, characterized in that: The slide rails include two slide rails, which are parallel to each other. The slide rails also include slide rail adjustment blocks to adjust the gap between the slide rails.

6. The driving device of the linear ultrasonic motor according to claim 1, characterized in that: It also includes a fixing device, through which the movable plate is connected to the vibrator module. The fixing device has an upper clamping plate and a lower clamping plate, the lower clamping plate is connected to the movable plate, the vibrator module is located between the upper clamping plate and the lower clamping plate, and the upper clamping plate and the lower clamping plate are connected by bolts.

7. The driving device of the linear ultrasonic motor according to claim 6, characterized in that: The upper clamping plate and the lower clamping plate both include positioning pins pointing toward the vibrator module, and the positioning pins match the positioning holes of the vibrator module to position the vibrator module.

8. The driving device of the linear ultrasonic motor according to claim 6, characterized in that: The fixing device further comprises a pressing block, which is located on the upper clamping plate. Both the pressing block and the upper clamping plate are provided with windows for the connecting piece of the vibrator module to pass through.

9. The driving device of the linear ultrasonic motor according to claim 1, characterized in that: A base is provided on the bottom plate, and the slider is located on the base.

10. The driving device of the linear ultrasonic motor according to claim 9, characterized in that: The cross section of the base is a convex shape, and the cross section of the slider is a concave shape matching the cross section of the base.

11. The driving device of the linear ultrasonic motor according to claim 1, characterized in that: The contact surface between the slider and the vibrator module is further provided with a friction structure to increase the friction force between the slider and the vibrator module.

12. The driving device of the linear ultrasonic motor according to claim 1, characterized in that: The contact surface between the slider and the vibrator module is further provided with a friction structure to reduce the friction force between the slider and the vibrator module.

13. The driving device of the linear ultrasonic motor according to claim 1, characterized in that: The driving device of the linear ultrasonic motor can be used for testing the vibrator module of the linear ultrasonic motor.

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