Piezoelectric linear motor and assembling method thereof

Abstract

The invention provides a piezoelectric linear motor, and the motor comprises a piezoelectric support which is provided with a cavity; the two side pressing blocks are installed on the inner wall surfaces of the two sides of the cavity respectively; the bottom pressing block is mounted on the inner wall surface of the bottom side of the cavity; the piezoelectric element can be installed in a space formed by the two side pressing blocks and the bottom pressing block in the cavity, the two side pressing blocks provide transverse elastic force for the piezoelectric element, and the bottom pressing block provides longitudinal elastic force for the piezoelectric element; and the sliding block is provided with a sliding block and an output block, and when the piezoelectric element deforms, the friction force between the friction head of the piezoelectric element and the sliding surface of the sliding block pushes the sliding block to linearly move and drives the output block to linearly move. The invention further provides an assembling method of the piezoelectric linear motor.

Description

Technical Field

[0001] The present disclosure relates to a piezoelectric linear motor and an assembly method thereof. Background Art

[0002] Traditional linear motors, which can be called electromagnetic linear motors, usually adopt a driving method of windings and magnets. This method has problems such as electromagnetic interference, high power consumption, and large heat generation.

[0003] Adopting piezoelectric drive, due to the advantages of high displacement resolution, small volume, and low power consumption of piezoelectric drive, the product has characteristics such as high control precision, small volume, and stepless speed change. The existing piezoelectric drive methods have complex structures and great assembly difficulties. Summary of the Invention

[0004] The present disclosure provides a piezoelectric linear motor and an assembly method thereof.

[0005] According to one aspect of the present disclosure, there is provided a piezoelectric linear motor, comprising: A piezoelectric bracket having a chamber; Two side pressing blocks respectively mounted to inner wall surfaces on both sides of the chamber; A bottom pressing block mounted to the inner wall surface at the bottom side of the chamber; A piezoelectric element capable of being mounted in a space formed by two side pressing blocks and a bottom pressing block in the chamber. The two side pressing blocks provide lateral elastic forces to the piezoelectric element, and the bottom pressing block provides a longitudinal elastic force to the piezoelectric element; A slider having a sliding block and an output block. When the piezoelectric element deforms, the frictional force between the friction head of the piezoelectric element and the sliding surface of the sliding block pushes the sliding block to move linearly, driving the output block to move linearly.

[0006] The piezoelectric linear motor according to this aspect provides a structure that is convenient for assembly, and can provide elastic forces through the side pressing blocks and the bottom pressing block, thereby stably holding the piezoelectric element, so that the operation of the motor is more stable. Moreover, through the elastic force provided by the bottom pressing block, it is ensured that there is better frictional force between the piezoelectric element and the slider, so that the control accuracy is better.

[0007] In the piezoelectric linear motor according to an embodiment of the present disclosure, two side limiting angles are formed on the inner wall surface of each side of the chamber. The included angle between the side limiting angle and the inner wall surface is an acute angle. At the inner side surface of each side, the two side limiting angles are used to engage a side pressing block.

[0008] In the piezoelectric linear motor of this embodiment, through the limiting angles, after the side pressing block is pushed in, the side pressing block can be pre-fixed, thereby simplifying the installation difficulty.

[0009] According to a piezoelectric linear motor according to an embodiment of the present disclosure, the side pressing block has a side pressing spring, and the side pressing spring can be installed in the side limiting grooves on the inner wall surfaces on both sides and provide the lateral elastic force.

[0010] In the piezoelectric linear motor of the present embodiment, by providing a side pressing spring, a lateral elastic force can be provided to the piezoelectric element, thereby maintaining the stability of the piezoelectric element.

[0011] According to a piezoelectric linear motor according to an embodiment of the present disclosure, the bottom pressing block has a bottom pressing spring, the bottom limiting corner of the piezoelectric support engages with the bottom pressing block, and the bottom pressing spring can be installed in the bottom limiting groove on the bottom side inner wall surface and provide the longitudinal elastic force.

[0012] In the piezoelectric linear motor of the present embodiment, through the limiting corner, after the bottom pressing block is pushed in, the bottom pressing block can be fixed in advance, thereby simplifying the installation difficulty. At the same time, through the longitudinal elastic force provided by the bottom pressing spring, good contact between the friction head of the piezoelectric element and the slider can be ensured, thereby ensuring good frictional force.

[0013] According to a piezoelectric linear motor according to an embodiment of the present disclosure, the piezoelectric support is T-shaped, the chamber is arranged in the longitudinal part of the T-shape, the top surface of the transverse part of the T-shape has a setting surface for setting the slider, and limiting balls are arranged between the sliding surface of the slider and the setting surface.

[0014] In the piezoelectric linear motor of the present embodiment, the overall size can be reduced through the T-shaped piezoelectric support, and the movement resistance can also be reduced through the limiting balls.

[0015] According to a piezoelectric linear motor according to an embodiment of the present disclosure, in the transverse part of the T-shape, both ends of the setting surface have convex structures, the slider is installed on the setting surface, and the transverse length of the setting surface is greater than the transverse length of the contact surface.

[0016] According to a piezoelectric linear motor according to an embodiment of the present disclosure, the piezoelectric linear motor further includes a limiting plate, the limiting plate can be installed on the upper part of the slider, and sliding balls are arranged between the slider and the limiting plate, the limiting plate has a through hole groove, the output block passes through the through hole groove, and the length of the through hole groove in the transverse direction is greater than the length of the output block in the transverse direction.

[0017] According to a piezoelectric linear motor according to an embodiment of the present disclosure, both the limiting plate and the convex structure are provided with threaded holes, and the limiting plate and the piezoelectric support are fixedly installed through screws and the threaded holes.

[0018] A piezoelectric linear motor according to an embodiment of the present disclosure, the through-hole groove and the side limiting angle are arranged to allow the side pressing block and the bottom pressing block to be pushed into from one side of the piezoelectric bracket.

[0019] According to another aspect of the present disclosure, there is provided an assembling method of the piezoelectric linear motor as described above, including: Pushing the side pressing block with a side pressing spring into the side limiting groove and the side limiting angle, and pushing the bottom pressing block with a bottom pressing spring into the bottom limiting groove and the bottom limiting angle, wherein the side pressing block is engaged by the side limiting angle and the side pressing spring is installed in the side limiting groove, the bottom pressing block is engaged by the bottom limiting angle and the bottom pressing spring is installed in the bottom limiting groove; Installing the piezoelectric element into the space formed by the side pressing block and the bottom pressing block; Installing the limiting balls on the piezoelectric bracket; Installing the sliding balls on the limiting plate, and then installing the slider; Installing the limiting plate on the piezoelectric bracket. Description of the Drawings

[0020] The drawings illustrate exemplary embodiments of the present disclosure and, together with the description thereof, are used to explain the principles of the present disclosure. The drawings are included to provide a further understanding of the present disclosure and are included in this specification and form a part of this specification.

[0021] Figure 1 is an exploded schematic view of a piezoelectric linear motor according to an embodiment of the present disclosure.

[0022] Figure 2 is a schematic view of a piezoelectric element according to an embodiment of the present disclosure.

[0023] Figure 3 is a schematic view of a slider according to an embodiment of the present disclosure.

[0024] Figure 4 is a schematic view of a piezoelectric bracket according to an embodiment of the present disclosure.

[0025] Figure 5 is a schematic view of a side pressing block according to an embodiment of the present disclosure.

[0026] Figure 6 is a schematic view of a bottom pressing block according to an embodiment of the present disclosure.

[0027] Figure 7 is a schematic view of the assembled piezoelectric linear motor according to an embodiment of the present disclosure. Detailed Description of the Embodiments

[0028] The present disclosure will be further described in detail below in conjunction with the accompanying drawings and embodiments. It can be understood that the specific embodiments described herein are only used to explain the relevant content and do not limit the present disclosure. Additionally, it should be noted that for the convenience of description, only the parts related to the present disclosure are shown in the drawings.

[0029] It should be noted that, without conflict, the embodiments in the present disclosure and the features in the embodiments can be combined with each other. The technical solutions of the present disclosure will be described in detail below with reference to the drawings and embodiments.

[0030] Unless otherwise specified, the exemplary embodiments / Examples shown are to be understood as providing exemplary features of various details of some ways in which the technical concept of the present disclosure can be implemented in practice. Therefore, unless otherwise specified, the features of various embodiments / Examples can be additionally combined, separated, interchanged, and / or rearranged without departing from the technical concept of the present disclosure.

[0031] In the drawings, cross-hatching and / or shading are generally used to make the boundaries between adjacent components clear. Thus, unless stated, the presence or absence of cross-hatching or shading does not convey or imply any preference or requirement for the specific material, material properties, dimensions, proportions, commonality between the components shown, and / or any other characteristics, attributes, properties, etc. of the components. Additionally, in the drawings, for clarity and / or descriptive purposes, the dimensions and relative dimensions of components may be exaggerated. When the exemplary embodiments can be implemented differently, the specific process sequences can be performed in a different order than described. For example, two consecutively described processes can be performed substantially simultaneously or in an order opposite to that described. Moreover, the same reference numerals denote the same components.

[0032] For descriptive purposes, the present disclosure may use spatial relative terms such as "under", "below", "beneath", "lower", "above", "upper", "on", "higher", and "side (e.g., as in "sidewall")" to describe the relationship between one component and another (other) component as shown in the drawings. In addition to the orientations depicted in the drawings, the spatial relative terms are also intended to encompass different orientations of the device during use, operation, and / or manufacture. For example, if the device in the drawings is flipped, the component described as "under" or "beneath" other components or features will then be positioned "above" the said other components or features. Thus, the exemplary term "under" can encompass both the "above" and "below" orientations. Additionally, the device can be positioned otherwise (e.g., rotated 90 degrees or at other orientations), and accordingly, the spatial relative descriptive terms used herein are to be interpreted.

[0033] According to an embodiment of the present disclosure, a piezoelectric linear motor is provided. Figure 1 The exploded schematic view of the piezoelectric linear motor according to an embodiment of the present disclosure is shown.

[0034] As Figure 1 shown, the piezoelectric linear motor may include a piezoelectric element 100 and a slider 200. Figure 2 The schematic view of the piezoelectric element 100 is shown. As Figure 2 shown, the piezoelectric element may include a piezoelectric body 110 and a friction head 120. The head of the friction head 120 has a predetermined area. The head with the predetermined area makes frictional contact with the bottom surface of the slider 200. When the piezoelectric element 100 deforms, the slider 200 can be moved through the frictional action between the head of the friction head 120 and the slider 200. The predetermined area is set such that an appropriate frictional force exists between the head of the friction head 120 and the slider 200. The shape of the piezoelectric body 110 is set to be a square column for facilitating the installation of the piezoelectric element 100. The friction head 120 may be set to be trapezoidal, where the area of the head of the friction head 120 is smaller than the area of the bottom. Additionally, the area of the head can also be adjusted according to the actual situation to provide an appropriate frictional force. Further, the bottom of the friction head 120 may be integrally formed with the piezoelectric body 110 or fixed to the piezoelectric body 110. The piezoelectric element 100 is the power source of the piezoelectric linear motor. Through the inverse piezoelectric effect of the piezoelectric, the piezoelectric deforms, thereby pushing the slider described below to move. The piezoelectric linear motor of the present application may be a standing wave ultrasonic motor, and a friction head 120 made of ceramic or other materials is combined at one end of the piezoelectric body 100. The material and shape of the friction head 120 are not limited.

[0035] Additionally, signals required by the piezoelectric element can be provided to the piezoelectric element through a flexible circuit board, or the signals of the piezoelectric element can be led out. The piezoelectric is electrically connected by connecting to the main circuit board through the flexible circuit board.

[0036] Figure 3 The schematic view of the slider 200 according to an embodiment of the present disclosure is shown. As Figure 3As shown, the slider 200 includes a sliding block 210 and an output block 220. The sliding block 210 can be designed in a plate shape. The bottom surface of the sliding block 210 is a sliding surface 211. The sliding surface 211 is in a smooth planar shape. The sliding surface 211 contacts the head of the friction head 120 of the piezoelectric element 100. When the piezoelectric element 100 deforms, the slider 200 is pushed to move through the frictional force formed between the friction head 120 and the sliding surface 211. For the sliding surface 211, its surface can be subjected to wear-resistant treatment or a wear-resistant material can be attached. Additionally, for the contact surface of the head of the friction head 120, wear-resistant treatment can also be performed or a wear-resistant material can be attached. The output block 220 is connected to other docking components (not shown in the figure), and the other docking components are, for example, components that need to be driven by the movement of the slider 200. In this application, the shape of the output block 220 is not limited and can be customized according to the docking components. In this application, by providing a driving signal to the piezoelectric element 100, the piezoelectric element is twisted and oscillated, and through the frictional force with the slider, the slider is driven to move, thereby achieving linear motion.

[0037] According to a further embodiment of the present disclosure, the piezoelectric linear motor may further include a piezoelectric support 300. The overall shape of the piezoelectric support 300 can be designed in a T shape. The piezoelectric support 300 includes a chamber for mounting the piezoelectric element 100. The piezoelectric support 300 includes a setting surface 310 opposite to the sliding surface 211 of the slider 200. Among them, the sliding surface 211 of the slider 200 can be arranged relative to the setting surface 310. The setting surface 310 has an opening for the friction head of the piezoelectric element to pass through and contact the sliding surface.

[0038] As Figure 1 and Figure 3 As shown, a ball groove 320 can be provided on the setting surface 310. A part (the lower part) of the limit ball 410 can be accommodated in the ball groove 320. After the slider 200 is installed on the piezoelectric support 300, the limit ball 410 contacts the sliding surface 211 of the slider 200. In this way, when the slider 200 moves, the movement resistance is reduced through the limit ball 410. The limit ball 410 has the characteristics of high wear resistance and high strength, and its shape can be a round bead or a cylinder. The function of the limit ball 410 is to limit the distance between the contact surface of the sliding block 210 and the friction head, so that better frictional force is generated between the two.

[0039] In addition, the setting surface 310 of the piezoelectric support 300 can be set such that in the lateral direction (left rear direction), the length of the setting surface 310 is greater than the length of the sliding surface 211 of the slider 200, so as to provide a moving space for the slider 200.

[0040] The piezoelectric linear motor further includes a limit plate 500. Protrusion structures 330 can be provided on both sides of the setting surface 310 of the piezoelectric support 300. In the direction towards the limit plate 500 and the slider 200, the protrusion structure 330 protrudes relative to the setting surface 310. The protruding height of the protrusion structure 330 is greater than the thickness of the slider block 210, and can be equal to the sum of the thickness of the slider block 210 and the radius of the sliding ball 410. In this way, after the limit plate 500 is installed on the piezoelectric support 300, the slider block 210 is located between the limit plate 500 and the piezoelectric support 300.

[0041] Positioning posts 340 can be provided on the protruding structure 330. As Figure 1 shown, one positioning post 340 is provided on each of the left and right protruding structures. Although not shown in the figure, corresponding positioning holes are provided on the limit plate 500. In this way, when the limit plate 500 is installed on the piezoelectric support 300, the positioning posts and the positioning holes can play a positioning role. In addition, after the limit plate 500 is installed on the piezoelectric support 300, the limit plate 500 and the piezoelectric support 300 can be fixed together by screws 510. Correspondingly, threaded holes for installing the screws 510 are provided at both ends of the limit plate 500 and in the two protruding structures of the piezoelectric support. The reference numerals of the threaded holes at both ends of the limit plate 500 are 530, and the reference numerals of the threaded holes provided in the two protruding structures are 380.

[0042] A through-hole groove 520 is provided on the limit plate 500. The size of the through-hole groove 520 in the transverse direction (left-right direction) is greater than the size of the output block 220 of the slider 200 in the transverse direction, and the size of the through-hole groove 520 in the width direction (front-back direction) is equal to or slightly greater than the size of the output block 220 of the slider 200 in the width direction. In this way, when the slider 200 moves, the output block 220 of the slider 200 can move in the transverse direction of the through-hole groove 520 (left-right movement), which is the linear drive of the piezoelectric linear motor. In addition, sliding balls 420 can be provided between the top surface of the slider block 210 of the slider 200 and the bottom surface of the limit plate 500. The sliding balls 420 can allow the slider 200 to move smoothly relative to the limit plate 500, eliminating movement resistance, etc. The sliding balls 420 have the characteristics of high wear resistance and high strength, and the shape can be spherical or cylindrical. The sliding balls and the limit balls reduce the movement resistance and increase the movement smoothness. In addition, as shown in the figure, the limit plate, the slider, and the piezoelectric support 300 are all provided in a strip shape.

[0043] As described above, the overall shape of the piezoelectric support 300 is designed as a T shape. Among them, the setting surface 310 and the protrusion structure 330 are designed on the top surface of the transverse part, and a chamber for accommodating the piezoelectric element 100 is designed in the longitudinal part. The longitudinal part can be designed to be similar to a U shape. The hollow part of the U shape is used to accommodate the piezoelectric element 100.

[0044] A side limiting angle 350 is formed on the inner wall surface of the chamber. The side limiting angle 350 protrudes inward relative to the inner surface and forms a C-shaped-like shape together with the inner wall surface. Refer to Figure 1 and Figure 4 , and two side limiting angles 350 are arranged in the longitudinal direction. And two side limiting angles are arranged on each inner side surface of the chamber. The included angle between the side limiting angle 350 and the inner wall surface is an acute angle.

[0045] The side limiting angle 350 is used for installing the side pressing block 600. The side pressing block 600 is pushed in from one side of the piezoelectric support 300, and the side pressing block 600 is clamped by the two side limiting angles through the inner wall surface on each side of the chamber. Finally, the side pressing block 600 is installed on the inner wall surface on each side of the chamber.

[0046] The side pressing block 600 is provided with a side pressing spring 610. Correspondingly, a side limiting groove 360 for accommodating the side pressing spring is formed on the inner wall surface of the chamber. The limiting groove penetrates at least one side of the above longitudinal part and is strip-shaped. In this way, the side pressing block 600 and the side pressing spring 610 can be pushed in from one side of the piezoelectric support 300. Figure 5 The structure of the side pressing block is shown. The side pressing block 600 can be a plastic block, and the side pressing spring 610 can be formed together with the plastic block by an insert molding process. In this application, the side pressing block 600 with a side pressing spring can also be replaced with other suitable elastic elements. Figure 5 The left side surface of the shown side pressing block 600 can be a plane, and the side pressing spring 610 is fixed on the right side surface of the side pressing block 600. The shapes of the upper and lower side surfaces of the side pressing block 600 are designed to match the surface shape of the side limiting angle 350. After the side pressing block 600 is pushed in, the upper and lower side surfaces of the side pressing block 600 form a snap fit with the surface of the side limiting angle 350, and a gap can be left between the two. In this way, after the side pressing block 600 is snap-fitted, the side pressing spring 610 in contact with the wall surface of the limiting groove provides an elastic force in the lateral direction to the side pressing block 600, so that the side pressing block 600 clamps the piezoelectric element 100 between the two side pressing blocks.

[0047] In addition, a bottom pressing block 700 can be installed on the bottom side of the inner side wall of the chamber. As Figure 6As shown, a bottom compression spring 710 is provided on the lower bottom surface of the bottom compression block 700. The bottom compression block 700 can be a plastic block, and the bottom compression spring 710 can be formed together with the plastic block through an insert molding process. In this application, the bottom compression block 700 with the bottom compression spring 710 can also be replaced with other suitable elastic elements. Similarly, the bottom compression block 700 can be pushed into the chamber from one side of the piezoelectric support 300. After the bottom compression block 700 is installed in the chamber, the bottom compression spring 710 abuts against the inner side wall of the chamber and provides an elastic force in the longitudinal direction, so that the bottom compression block 700 presses the piezoelectric element 100 tightly. As Figure 7 shown, the piezoelectric support 300 can also be formed with a bottom limiting angle 390. After the bottom compression block 700 is installed in the chamber, its position is limited by the bottom limiting angle 390.

[0048] Correspondingly, a bottom limiting groove can also be formed on the bottom side of the inner side wall of the chamber, and the limiting groove is used to accommodate the bottom compression spring 710 and is strip-shaped. In this application, through the setting of the side compression spring and the bottom compression spring, an elastic mechanism is provided on both the side of the piezoelectric element and one side of the frictionless block. The friction block of the piezoelectric element is pressed against the sliding surface of the sliding block through the elasticity of the low-pressure spring of the bottom compression block.

[0049] Figure 7 The schematic diagram of the assembled piezoelectric linear motor is shown (where the pressing plate mentioned below is not installed to better show the internal structure). The friction block of the piezoelectric element is pressed against the sliding surface of the slider through the elasticity of the bottom compression block. When a leftward movement circuit voltage is applied to the piezoelectric element, the piezoelectric element will deform along the diagonal and become a parallelogram. The slider drives the slider to move in the leftward arrow direction shown in the figure through the friction force between the piezoelectric friction head and the slider sliding surface. When the power is off, the piezoelectric element returns to its original shape and returns to its original position under the elastic force of the side compression block. When a high-frequency alternating voltage is applied, the slider can be driven to move in one direction all the time. On the contrary, when a rightward movement circuit voltage is applied, the piezoelectric element deforms along the other set of diagonals and the slider will move rightward.

[0050] After the side compression block 600 and the bottom compression block 700 are installed, the piezoelectric element 100 can be pushed into the chamber to complete the installation of the components. Those skilled in the art should understand that this installation method provided in this application can make the processing of the entire piezoelectric linear motor simple and the assembly simple. There are side limiting angles provided inside the piezoelectric support. First, the side compression block and the bottom compression block are installed, and then the piezoelectric element is snapped in, which is convenient for assembly.

[0051] In addition, the piezoelectric linear motor of this application can also include a pressing plate 800, as Figure 1 shown. After the piezoelectric element 100 is installed, the pressing plate 800 can be installed. In Figure 1As shown, the pressure plate is installed only on one side. For the other side of the piezoelectric bracket 300, it can be a structure of a closed wall integrated with the piezoelectric bracket 300.

[0052] According to the piezoelectric linear motor of the present application, piezoelectric drive is adopted. Due to the advantages of high displacement resolution, small size, and low power consumption of piezoelectric drive, the product has the characteristics of high control precision, small size, and stepless speed change. The overall structure is output as a motor unit and can be adapted to any other structure that needs to be driven. The piezoelectric output is output through the frictional force between the friction block and the sliding block, and the output characteristics can be changed by adjusting the surface state of the friction surfaces of the two.

[0053] According to a further embodiment of the present application, an assembly method of the above piezoelectric linear motor is also provided. Push the side pressure block with the side pressure spring into the side limit groove and the side limit angle, and push the bottom pressure block with the bottom pressure spring into the bottom limit groove and the bottom limit angle, wherein the side pressure block is engaged by the side limit angle and the side pressure spring is installed in the side limit groove, the bottom pressure block is engaged by the bottom limit angle and the bottom pressure spring is installed in the bottom limit groove; install the piezoelectric element into the space formed by the side pressure block and the bottom pressure block; install the limit ball on the piezoelectric bracket; install the sliding ball on the limit plate, and then install the slider; install the limit plate on the piezoelectric bracket.

[0054] Briefly speaking, first install the side pressure block and the bottom pressure block into the limit angle of the piezoelectric bracket, align the springs with the limit grooves for assembly, then snap the piezoelectric element into the limit block, so that both the side and the side without the friction block of the piezoelectric element have elastic mechanisms, then install the limit ball into the ball groove of the pressure reduction bracket, install the sliding ball into the limit plate, then install the slider into the limit plate, and then match the whole with the piezoelectric bracket and lock in the screws to complete the assembly.

[0055] In the technical solution of the present application, piezoelectric drive is adopted. Due to the advantages of high displacement resolution, small size, and low power consumption of piezoelectric drive, the product has the characteristics of high control precision, small size, and stepless speed change. The piezoelectric bracket is provided with limit angles, and the side pressure block and the bottom pressure block can be installed first, and then the piezoelectric element can be snapped in, which is convenient for assembly. The limit ball and the sliding ball reduce the movement resistance and increase the movement smoothness. The overall structure is output as a motor unit and can be adapted to any other structure that needs to be driven. The piezoelectric output is output through the frictional force between the friction block and the sliding block, and the output characteristics can be changed by adjusting the surface state of the friction surfaces of the two.

[0056] In the description of this specification, the description referring to terms such as "one embodiment / way", "some embodiments / ways", "example", "specific example", or "some examples" means that the specific features, structures, materials, or characteristics described in connection with the embodiment / way or example are included in at least one embodiment / way or example of this application. In this specification, the schematic expressions of the above terms do not necessarily refer to the same embodiment / way or example. Moreover, the specific features, structures, materials, or characteristics described can be combined in a suitable manner in any one or more embodiments / ways or examples. In addition, without contradiction, those skilled in the art can combine and combine the different embodiments / ways or examples described in this specification and the features of different embodiments / ways or examples.

[0057] In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include at least one of such features. In the description of this application, "a plurality" means at least two, such as two, three, etc., unless otherwise specifically and clearly defined.

[0058] Those skilled in the art should understand that the above embodiments are merely for clearly explaining the present disclosure and are not intended to limit the scope of the present disclosure. For those skilled in the art, other changes or modifications can be made on the basis of the above disclosure, and these changes or modifications are still within the scope of the present disclosure.

Claims

1. A piezoelectric linear motor, characterized in that: include: a piezoelectric support having a chamber; Two side pressure blocks are respectively installed on the inner wall surfaces on both sides of the chamber; a bottom pressure block mounted to the inner wall surface of the bottom side of the chamber; The piezoelectric element can be installed in a space formed by two side pressure blocks and one bottom pressure block in the chamber, the two side pressure blocks provide lateral elastic force to the piezoelectric element, and the bottom pressure block provides longitudinal elastic force to the piezoelectric element; The slider has a sliding block and an output block. When the piezoelectric element is deformed, the friction between the friction head of the piezoelectric element and the sliding surface of the sliding block pushes the sliding block to move linearly, thereby driving the output block to move linearly.

2. The piezoelectric linear motor according to claim 1, characterized in that: The inner wall surface of each side of the chamber is formed with two side limiting angles, and the included angle between the side limiting angle and the inner wall surface is an acute angle. At the inner side surface of each side, the two side limiting angles are used to engage a side pressure block.

3. The piezoelectric linear motor according to claim 2, characterized in that: The side pressure block has a side pressure spring, which can be installed in the side limiting grooves of the inner wall surfaces on both sides and provide the lateral elastic force.

4. The piezoelectric linear motor according to claim 3, characterized in that: The bottom pressure block has a bottom pressure spring, and the bottom limiting angle of the piezoelectric bracket engages the bottom pressure block. The bottom pressure spring can be installed in the bottom limiting groove of the inner wall surface of the bottom side and provides the longitudinal elastic force.

5. The piezoelectric linear motor according to claim 4, characterized in that: The piezoelectric support is T-shaped, the chamber is arranged in the longitudinal part of the T, the top surface of the transverse part of the T has a setting surface for setting the sliding block, and a limiting ball is arranged between the sliding surface of the sliding block and the setting surface.

6. The piezoelectric linear motor according to claim 5, characterized in that: In the T-shaped transverse portion, both ends of the setting surface have convex structures, the sliding block is mounted to the setting surface, and the transverse length of the setting surface is greater than the transverse length of the contact surface.

7. The piezoelectric linear motor according to claim 6, characterized in that: The piezoelectric linear motor also includes a limit plate, which can be installed on the upper part of the sliding block, and a sliding ball is arranged between the sliding block and the limit plate. The limit plate has a through hole groove, and the output block passes through the through hole groove. The transverse length of the through hole groove is greater than the transverse length of the output block.

8. The piezoelectric linear motor according to claim 7, characterized in that: The limiting plate and the protruding structure are both provided with threaded holes, and the limiting plate and the piezoelectric bracket are fixedly installed by screws and the threaded holes.

9. The piezoelectric linear motor according to claim 7, characterized in that: The through hole groove and the side limiting angle are arranged to allow the side pressing block and the bottom pressing block to be pushed in from one side of the piezoelectric support.

10. An assembly method of a piezoelectric linear motor as claimed in claim 9, characterized in that: include: Push the side pressure block with the side pressure spring into the side limiting groove and the side limiting angle, and push the bottom pressure block with the bottom pressure spring into the bottom limiting groove and the bottom limiting angle, wherein the side pressure block is clamped by the side limiting angle and the side pressure spring is installed in the side limiting groove, and the bottom pressure block is clamped by the bottom limiting angle and the bottom pressure spring is installed in the bottom limiting groove; Installing the piezoelectric element into the space formed by the side pressing block and the bottom pressing block; Installing a limiting ball on the piezoelectric support; Install the sliding ball onto the limit plate, and then install the slider; Install the stop plate to the piezoelectric holder.

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