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 sliding table 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 clamping module is located on the bottom plate, one end of the clamping module is connected with the sliding table, and the clamping module can adjust the position of the sliding table on the bottom plate; the guide rail is located on the sliding table and used for being in contact with the vibrator module; the guide rod is located on the bottom plate, and the two ends of the guide rod are connected with the bottom plate through guide rod supporting columns; wherein the moving direction of the sliding table is perpendicular to the moving direction of the vibrator module along the guide rail, the clamping module adjusts the position of the sliding table on the bottom plate so that the guide rail on the sliding table can make contact with the vibrator module, and the vibrator module moves in the axial direction of the guide rod through friction force between the vibrator module and the guide rail. According to the driving device of the linear ultrasonic motor, the guide rail in contact with the vibrator module is arranged on the sliding table, so that the pre-pressure of the vibrator module can be adjusted through the clamping module.

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, it is urgent 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] According to one aspect of the present invention, a driving device for a linear ultrasonic motor is provided, comprising: a base plate; a slide located on the base plate, the slide being connected to the base plate via a slide rail, and the slide being movable relative to the base plate along the slide rail; a clamping module located on the base plate, one end of the clamping module being connected to the slide, and the clamping module being capable of adjusting the position of the slide on the base plate; a guide rail located on the slide, the guide rail being used to contact a vibrator module; a guide rod located on the base plate, the two ends of the guide rod being connected to the base plate via guide rod supports; wherein the moving direction of the slide is perpendicular to the moving direction of the vibrator module along the guide rail, the clamping module adjusts the position of the slide on the base plate so that the guide rail on the slide contacts the vibrator module, and the vibrator module moves along the axial direction of the guide rod by means of the friction between the guide rail and the guide rail.

[0008] Optionally, the clamping module includes a push rod and an adjusting bolt, one end of the push rod is connected to the slide, and the extending length of the push rod can be adjusted by the adjusting bolt.

[0009] Optionally, the clamping module further includes a pressure sensor, which is located between the push rod and the adjusting bolt, and is used to measure the force exerted by the guide rail on the vibrator module.

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

[0011] Optionally, both ends of the guide rail are connected to the slide via columns.

[0012] Optionally, bearings are further provided at both ends of the guide rail, and the guide rail is connected to the column via the bearings, and the guide rail can rotate relative to the column.

[0013] Optionally, the contact portion between the guide rail and the vibrator module is a plane or a straight line.

[0014] Optionally, the guide rail and the bearing are detachably connected.

[0015] Optionally, a fixing device is further included, and the fixing device is used to fix the vibrator module. The fixing device also includes a guide sleeve, and the guide sleeve connects the vibrator module to the guide rod.

[0016] Optionally, the slides include two, and the two slides are symmetrically arranged on both sides of the guide rod. The clamping modules also include two, and the two clamping modules respectively adjust the positions of the two slides on the base plate.

[0017] Optionally, the two slides are respectively provided with guide rails, and the two guide rails are respectively in contact with the driving feet on both sides of the vibrator module.

[0018] Optionally, the driving device of the linear ultrasonic motor is used to test the vibrator module of the linear ultrasonic motor.

[0019] The driving device of the linear ultrasonic motor provided by the utility model arranges the guide rail in contact with the vibrator module on a slide, so that the pre-pressure of the vibrator module can be adjusted by the clamping module, thereby performing driving or testing.

[0020] Furthermore, the guide rail can rotate on the slide, so that it can better adapt to the driving foot of the vibrator module, ensuring that the contact between the vibrator module and the guide rail is always line contact.

[0021] Furthermore, the clamping module also has a pressure sensor and an automatic adjustment device, which can facilitate the study of the influence of the pre-pressure size on the operating performance of the vibrator module. Through the automatic adjustment device, the pre-pressure can be dynamically adjusted according to the pre-pressure size feedback from the pressure sensor to ensure that the pre-pressure size between the vibrator module and the guide rail is constant.

[0022] Furthermore, the guide rail of the driving device of the linear ultrasonic motor is fixed on the slide, and the vibrator module moves relative to the guide rail, which is suitable for application scenarios that require the vibrator module to move.

[0023] Furthermore, the detachable design of the guide rail makes the replacement of the guide rail more convenient, and multiple contact parameters such as the guide rail material (hardness) and the roughness of the guide rail contact surface can be easily adjusted, which significantly improves the research and testing efficiency of the motor stator performance and reduces the development cycle of the vibrator module. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] 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.

[0025] Figure 1 A schematic diagram of a driving device for a linear ultrasonic motor according to a first embodiment of the present invention is shown;

[0026] Figure 2 It shows a left side view of the driving device of the linear ultrasonic motor of the first embodiment of the present utility model;

[0027] Figure 3 A front view of a driving device for a linear ultrasonic motor according to a first embodiment of the present invention is shown;

[0028] Figure 4 A top view of a driving device for a linear ultrasonic motor according to a first embodiment of the present invention is shown;

[0029] Figure 5 A schematic diagram showing a vibrator module and a fixing device in a driving device of a linear ultrasonic motor according to a first embodiment of the present invention is shown;

[0030] Figure 6 A 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 1Schematic diagram of a driving device of a linear ultrasonic motor according to a first embodiment of the present invention is shown; the driving device of the linear ultrasonic motor includes: a base plate 110 , a slide 120 , a clamping module 130 , a guide rail 140 and a guide rod 150 . The base plate 110 is, for example, rectangular, and the left and right side areas of the base plate 110 are symmetrically provided with clamping modules 130. A guide rod 150 is also provided on the base plate 110. The axial direction of the guide rod 150 is parallel to the left and right side edges of the base plate 110. The guide rod 150 is connected to the base plate 110 through the guide rod columns 151 on the upper and lower sides of the base plate 110. Two slides 120 are also provided on the base plate 110. The slide 120 is connected to the base plate 110 through a slide rail 111. The direction of the slide rail 111 is perpendicular to the axial direction of the guide rod 150. The slide 120 can move on the base plate 110 along the slide rail 111. The slide 120 is connected to the clamping module 130 on the side away from the guide rod 150. The clamping module 130 includes an adjusting bolt 131 and a push rod 132. One end of the push rod 132 is connected to the slide 120. By rotating the adjusting bolt The bolt 131 can adjust the length of the push rod 132, thereby adjusting the position of the slide 120 on the base plate 110, so that the slide 120 moves closer to or further away from the guide rod 150. Furthermore, the clamping module 130 also includes a pressure sensor 133, which is used to display the force exerted by the push rod 132 on the slide 120. This force is also equivalent to the preload applied by the guide rail 140 to the vibrator module 200. By rotating the adjustment bolt 131, the preload can be adjusted to test 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 measured by capturing the image with a high-speed camera and then calculating the speed. The thrust can be measured by attaching a weight to the vibrator module 200, 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 to ensure that the operating speed and thrust of the vibrator module 200 reach appropriate values. A guide rail 140 is provided on the side of the slide 120 near the guide rod 150. The guide rail 140 is, for example, in the shape of a rectangular plate, and its contact surface with the vibrator module 200 is, for example, a flat surface. The guide rail 140 is connected to the slide 120 via columns 141 at both ends. Furthermore, the ends of the guide rail 140 are connected to the columns 141 via bearings 142, allowing the guide rail 140 to rotate to better adapt to the driving foot of the vibrator module 200. For example, if the machining accuracy of the two contact feet of the vibrator module 200 is poor, and the contact lines between the two guide rails 140 used for contact with the driving feet are non-parallel and at a certain angle, the two guide rails 140 can also adapt to the certain angle. Furthermore, the connection between the guide rail 140 and the bearing 142 is detachable, meaning that the guide rail 140 is replaceable. By replacing guide rails with different contact surface roughness, materials, and hardness, the performance parameters of the vibrator module 200 when in contact with different objects can be obtained.The vibrator module 200 is fixed by a fixing device 210 and connected to the guide rod 150 , so that the vibrator module 200 moves along the axial direction of the guide rod 150 by utilizing the friction between the vibrator module 200 and the guide rails 140 on both sides.

[0037] Figure 2 The left side view of the driving device of the linear ultrasonic motor of the first embodiment of the present invention is shown; Figure 2 It can be seen that the slide 120 is located above the base plate 110 and is connected to the base plate 110 through the slide rail 111. The slide rail 111 is, for example, a cross-roller linear guide rail. The height of the guide rod 150 is higher than the guide rail 140. The height of the guide rod column 151 is greater than the sum of the thickness of the slide 120 and the height of the column 141. The motor fixing device 210 also includes a guide sleeve 211. The linear motor 200 is connected to the guide rail 150 through the guide sleeve 211.

[0038] Figure 3 The front view of the driving device of the linear ultrasonic motor of the first embodiment of the present invention is shown; Figure 3 As can be seen in the figure, by rotating the adjusting bolt 131, the extended length of the push rod 132 can be adjusted, so that the push rod 132 moves in the direction of the arrow, thereby driving the slide 120 to approach or move away from the guide rod column 151 and the guide rod 150 (vibrator module 200), so that the guide rail 140 on the slide 120 contacts the vibrator module 200 and provides pre-pressure to the vibrator module 200.

[0039] Figure 4 A top view of a driving device for a linear ultrasonic motor according to a first embodiment of the present invention is shown; Figure 5 The figure shows a schematic diagram of the vibrator module and the fixing device in the driving device of the linear ultrasonic motor of the first embodiment of the present invention. Figure 4 It can be seen that the driving device of the linear ultrasonic motor is arranged symmetrically on the left and right sides, and the slides 120 on the left and right sides can be adjusted independently, so that the two guide rails 140 clamp the vibrator module 200 from the left and right sides of the vibrator module 200. Furthermore, the vibrator module 200 is, for example, a piezoelectric vibrator module, and the driving feet on both sides are arc surfaces, and the contact between the driving feet and the guide rails 140 is line contact. Figure 5 The illustrated fixture 210 clamps the vibrator module 200 from its upper and lower sides. A guide sleeve 211 is disposed above the fixture 210. The guide sleeve 211 comprises, for example, a linear bearing. The guide sleeve 211 cooperates with the guide rod 150 to restrict the freedom of the vibrator module 200, allowing it to move linearly along the axial direction of the guide rod 150. It is understood that the vibrator module 200 may also employ other structures; any vibrator module having two driving feet is suitable for use in the drive device of the linear ultrasonic motor.

[0040] Figure 6A 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 device 130 of the second embodiment further includes an automatic adjustment device 134 connected to the push rod 132. The automatic adjustment device 134 includes a single-chip microcomputer. When the vibrator module 200 is in operation, the preload between the vibrator module 200 and the guide rail 140 may change. At this time, the single-chip microcomputer in the automatic adjustment device 134 controls the motor in the automatic adjustment device 134 to move the push rod 132 based on the preload feedback from the pressure sensor 133 (the force exerted by the guide rail 140 on the vibrator module 200), thereby adjusting the position of the guide rail 140 and dynamically adjusting the preload, thereby achieving dynamic balance and ensuring a constant preload between the vibrator module 200 and the guide rail 140.

[0041] The driving device of the linear ultrasonic motor provided by the utility model arranges the guide rail in contact with the vibrator module on a slide, so that the pre-pressure of the vibrator module can be adjusted by the clamping module, thereby performing driving or testing.

[0042] Furthermore, the guide rail can rotate on the slide, so that it can better adapt to the driving foot of the vibrator module, ensuring that the contact between the vibrator module and the guide rail is always line contact.

[0043] Furthermore, the clamping module also has a pressure sensor and an automatic adjustment device, which can facilitate the study of the influence of the pre-pressure size on the operating performance of the vibrator module. Through the automatic adjustment device, the pre-pressure can be dynamically adjusted according to the pre-pressure size feedback from the pressure sensor to ensure that the pre-pressure size between the vibrator module and the guide rail is constant.

[0044] Furthermore, the guide rail of the driving device of the linear ultrasonic motor is fixed on the slide, and the vibrator module moves relative to the guide rail, which is suitable for application scenarios that require the vibrator module to move.

[0045] Furthermore, the detachable design of the guide rail makes the replacement of the guide rail more convenient, and multiple contact parameters such as the guide rail material (hardness) and the roughness of the guide rail contact surface can be easily adjusted, which significantly improves the research and testing efficiency of the motor stator performance and reduces the development cycle of the vibrator module.

[0046] 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.

[0047] 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 slide is located on the bottom plate, the slide is connected to the bottom plate via a slide rail, and the slide can move relative to the bottom plate along the slide rail; A clamping module is located on the bottom plate, one end of the clamping module is connected to the slide, and the clamping module can adjust the position of the slide on the bottom plate; a guide rail, located on the slide, and configured to contact the vibrator module; A guide rod is located on the bottom plate, and both ends of the guide rod are connected to the bottom plate through guide rod supports; The moving direction of the slide is perpendicular to the moving direction of the vibrator module along the guide rail. The clamping module adjusts the position of the slide on the base plate so that the guide rail on the slide contacts the vibrator module. The vibrator module moves along the axial direction of the guide rod using the friction between the vibrator module and the guide rail.

2. The driving device of the linear ultrasonic motor according to claim 1, characterized in that: The clamping module includes a push rod and an adjusting bolt. One end of the push rod is connected to the slide. The extending length of the push rod can be adjusted by the adjusting bolt.

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 adjusting bolt. The pressure sensor is used to measure the force exerted by the guide rail on the vibrator module.

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 slide according to data from the pressure sensor.

5. The driving device of the linear ultrasonic motor according to claim 1, characterized in that: Both ends of the guide rail are connected to the slide via columns.

6. The driving device of the linear ultrasonic motor according to claim 5, characterized in that: Bearings are also provided at both ends of the guide rail, and the guide rail is connected to the column through the bearings, and the guide rail can rotate relative to the column.

7. The driving device of the linear ultrasonic motor according to claim 6, characterized in that: The contact portion between the guide rail and the vibrator module is a plane or a straight line.

8. The driving device of the linear ultrasonic motor according to claim 6, characterized in that: The guide rail and the bearing are detachably connected.

9. The driving device of the linear ultrasonic motor according to claim 1, characterized in that: It also includes a fixing device for fixing the vibrator module. The fixing device also includes a guide sleeve, which connects the vibrator module to the guide rod.

10. The driving device of the linear ultrasonic motor according to claim 1, characterized in that: The slides include two, and the two slides are symmetrically arranged on both sides of the guide rod. The clamping modules also include two, and the two clamping modules respectively adjust the positions of the two slides on the base plate.

11. The driving device of the linear ultrasonic motor according to claim 10, characterized in that: The two slides are respectively provided with guide rails, and the two guide rails are respectively in contact with the driving feet on both sides of the vibrator module.

12. The driving device of the linear ultrasonic motor according to claim 1, characterized in that: The driving device of the linear ultrasonic motor is used to test the vibrator module of the linear ultrasonic motor.

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