One-dimensional symmetrical light-weight large-stroke precise micro-displacement positioning platform

Abstract

The utility model discloses a one-dimensional symmetrical light-weight large-stroke precise micro-displacement positioning platform which comprises a base which is provided with a micro-displacement platform and a piezoelectric micro-displacement driver, and is characterized in that output positions at two ends of an X axis of the piezoelectric micro-displacement driver are respectively provided with a lever mechanism I and a lever mechanism II; bridge type mechanisms are connected to the inner sides of the two lever mechanisms, and the output ends of the bridge type mechanisms are connected with the micro-motion platform through flexible hinges so as to push the micro-motion platform to achieve micro displacement in the X direction. The lever mechanism is connected to the X-axis output end of the piezoelectric micro-displacement driver to serve as a first-stage amplification mechanism, and the bridge type mechanism serves as a second-stage amplification mechanism to amplify the output displacement of the piezoelectric micro-displacement driver, so that on the premise that the micro-displacement platform obtains a large stroke, the light-weight design can be adopted, the size and the mass of the micro-displacement platform are reduced, and the cost is reduced. And the dynamic performance of the precise micro-displacement positioning platform is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of micro-displacement, in particular to a one-dimensional symmetrical, lightweight, large-stroke, precise micro-displacement positioning platform. Background Art

[0002] Precision micro-displacement positioning platforms have been widely used in precision machining, biomedical operations, fiber optic docking and other fields. Piezoelectric micro-displacement actuators are often used in precision micro-displacement positioning platforms, and the output displacement of piezoelectric actuators is very small. In applications where a larger displacement is required, a flexible hinge mechanism is often used to amplify its output displacement. However, after the amplification mechanism is applied, the volume and mass of the precision micro-displacement positioning platform will often increase, which will also reduce the dynamic performance of the precision micro-displacement positioning platform.

[0003] This case was created to solve the above problems. Utility Model Content

[0004] In view of the deficiencies in the prior art, the utility model provides a one-dimensional symmetrical, lightweight, long-stroke, precision micro-displacement positioning platform, which solves the problems raised in the above-mentioned background technology.

[0005] To achieve the above purpose, the utility model is implemented through the following technical solutions: a one-dimensional symmetrical lightweight large-stroke precision micro-displacement positioning platform, including a base, on which a micro-motion platform and a piezoelectric micro-displacement driver are arranged, and the output positions at both ends of the X-axis of the piezoelectric micro-displacement driver are respectively provided with a lever mechanism 1 and a lever mechanism 2, and the inner sides of the two lever mechanisms are connected with a bridge mechanism, and the output end of the bridge mechanism is connected to the micro-motion platform through a flexible hinge to promote the micro-motion platform to achieve micro-displacement in the X direction.

[0006] Preferably, the micro-motion platform is symmetrically provided with a first parallelogram bar mechanism and a second parallelogram bar mechanism, which guide the movement of the micro-motion platform.

[0007] Preferably, the lever mechanism 1, the parallelogram mechanism 1, the bridge mechanism, the flexible hinge, the micro-motion platform, the parallelogram mechanism 2 and the lever mechanism 2 all adopt a hollow structure, and the hollow shape of the hollow structure is any one of an ellipse, an arc and a rectangle.

[0008] Preferably, the gap size between the piezoelectric micro-displacement driver and the lever mechanism 1 and the lever mechanism 2 is adjusted by an adjusting sheet.

[0009] Preferably, the adjustment sheet comprises any one of a group of parts with different thicknesses, and is selectively installed according to the size of the gap between the piezoelectric micro-displacement driver and the lever mechanism 1 and the lever mechanism 2 after installation.

[0010] Preferably, the overall structure of the micro-displacement positioning platform is symmetrical about the X-axis.

[0011] After adopting the above technical scheme, the utility model has the following advantages compared with the prior art: the utility model is a one-dimensional symmetrical lightweight large-stroke precision micro-displacement positioning platform, which adopts a lever mechanism connected to the X-axis output end of the piezoelectric micro-displacement driver as a primary amplification mechanism, and uses a bridge mechanism as a secondary amplification mechanism to amplify the output displacement of the piezoelectric micro-displacement driver, so that the micro-motion platform can obtain a large stroke while also being able to adopt a lightweight design, thereby reducing its volume and mass and improving the dynamic performance of the precision micro-displacement positioning platform. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 This is a schematic diagram of the overall structure of the micro-displacement positioning platform of the utility model;

[0013] Figure 2 It is a schematic diagram of the shape of the hollowed-out part of the bridge mechanism of the utility model;

[0014] Figure 3 It is a schematic diagram of the shape of the hollowed-out parts of each moving component in the utility model.

[0015] In the figure: 1. adjustment plate; 2. base; 3. lever mechanism 1; 4. parallelogram mechanism 1; 5. bridge mechanism; 6. flexible hinge; 7. micro-motion platform; 8. parallelogram mechanism 2; 9. lever mechanism 2; 10. piezoelectric micro-displacement driver. DETAILED DESCRIPTION

[0016] The utility model is further described in detail below through the drawings and embodiments.

[0017] like Figure 1-2 As shown: a one-dimensional symmetrical lightweight large-stroke precision micro-displacement positioning platform, including a micro-motion platform 7, a base 2, a lever mechanism 1 3 and a lever mechanism 2 9, a bridge mechanism 5, a parallel four-bar mechanism 1 4 and a parallel four-bar mechanism 2 8, a piezoelectric micro-displacement driver 10, and an adjustment sheet 1. It is installed through 6 holes on the base 2, and the bridge mechanism 5 is installed through 1 hole.

[0018] The movement process is as follows: after the piezoelectric micro-displacement driver 10 is powered on, the two ends thereof extend in the Y direction respectively, pushing the lever mechanism 3 and the lever mechanism 2 9 to rotate, respectively pulling the bridge mechanism 5 to move, and the output end of the bridge mechanism 5 pushes the micro-motion platform 7 to move through the flexible hinge 6, and finally realizing the micro-displacement in the X direction.

[0019] Specifically, Figure 1As shown, the left ends of the lever mechanism 1 3 and the lever mechanism 2 9 are pivotally connected to the base 2. Under the action of the piezoelectric micro-displacement driver 10 (which extends upward and downward at the same time after being energized), the lever mechanism 1 3 and the lever mechanism 2 9 rotate outward respectively, thereby pulling the bridge mechanism 5 connected to the corresponding side. After the bridge mechanism 5 (conventional mechanism) moves in the Y direction under the force, it drives the micro-motion platform 7 to realize the movement in the X-axis direction.

[0020] The symmetrically distributed parallelogram mechanism 1 4 and parallelogram mechanism 2 8 are respectively located on both sides of the micro-motion platform 7 , and play a guiding role in the movement of the micro-motion platform 7 .

[0021] The piezoelectric micro-displacement driver 10 is installed between the lever mechanism 1 3 and the lever mechanism 2 9, and the size is adjusted by the adjusting piece 1. The adjusting piece 1 is a set of parts with different thicknesses, and one of them is selected for installation according to the size of the gap between the piezoelectric micro-displacement driver 10 and the lever mechanism 1 3 and the lever mechanism 2 9 after installation.

[0022] The bridge mechanism 9 and the lever mechanism 3 are used as a two-stage amplification mechanism to amplify the output displacement of the piezoelectric micro-displacement driver 10, so as to realize a large stroke of the micro-motion platform.

[0023] The moving parts in the micro-displacement positioning platform (i.e., lever mechanism 1, parallel four-bar mechanism 1, bridge mechanism, flexible hinge, micro-motion platform, parallel four-bar mechanism 2 and lever mechanism 2) adopt a hollow structure, which reduces the mass of the moving parts and improves the dynamic response capability of the micro-motion platform.

[0024] As attached Figure 3 As shown, the hollow shape of the hollow structure can be any one of an ellipse, an arc, and a rectangle.

[0025] The overall structure of the micro-displacement positioning platform is symmetrical about the X-axis, ensuring that the micro-motion platform only produces micro-displacement in the X-direction, effectively overcoming the input and output coupling problem.

[0026] The above-mentioned embodiments are for inspiration. Through the above-mentioned description, relevant staff can make various changes and modifications without departing from the scope of the invention. The technical scope of this new type of use is not limited to the content in the specification, and its protection scope must be determined according to the scope of the claims.

Claims

1. A one-dimensional symmetrical lightweight long-stroke precision micro-displacement positioning platform, comprising a base, on which a micro-motion platform and a piezoelectric micro-displacement driver are arranged, characterized in that: The output positions at both ends of the X-axis of the piezoelectric micro-displacement driver are respectively provided with a lever mechanism 1 and a lever mechanism 2, the inner sides of the two lever mechanisms are connected with a bridge mechanism, and the output end of the bridge mechanism is connected to the micro-motion platform through a flexible hinge to push the micro-motion platform to achieve micro-displacement in the X direction.

2. The one-dimensional symmetrical lightweight long-stroke precision micro-displacement positioning platform according to claim 1, characterized in that: The micro-motion platform is symmetrically provided with a first parallelogram mechanism and a second parallelogram mechanism, which guide the movement of the micro-motion platform.

3. The one-dimensional symmetrical lightweight long-stroke precision micro-displacement positioning platform according to claim 2, characterized in that: The lever mechanism 1, parallelogram mechanism 1, bridge mechanism, flexible hinge, micro-motion platform, parallelogram mechanism 2 and lever mechanism 2 all adopt hollow structures, and the hollow shape of the hollow structure is any one of ellipse, arc and rectangle.

4. The one-dimensional symmetrical lightweight long-stroke precision micro-displacement positioning platform according to claim 1, characterized in that: The gap size between the piezoelectric micro-displacement driver and the lever mechanism 1 and the lever mechanism 2 is adjusted through an adjusting sheet.

5. The one-dimensional symmetrical lightweight long-stroke precision micro-displacement positioning platform according to claim 4, characterized in that: The adjustment sheet includes any one of a group of parts with different thicknesses, and is selectively installed according to the size of the gap between the piezoelectric micro-displacement driver and the lever mechanism 1 and the lever mechanism 2 after installation.

6. The one-dimensional symmetrical lightweight long-stroke precision micro-displacement positioning platform according to claim 1, characterized in that: The overall structure of the micro-displacement positioning platform is symmetrical about the X-axis.

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