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Two-degree-of-freedom flexible parallel mechanism for motion decoupling

A degree of freedom, flexible technology, used in manipulators, program-controlled manipulators, manufacturing tools, etc., can solve problems such as small strokes, achieve compact structure, no accumulation of errors in structure, and reduce assembly processes.

Active Publication Date: 2016-08-31
SOUTH CHINA UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Usually, the precision positioning platform is driven by a piezoelectric ceramic driver. Compared with the traditional driving method, this kind of driver has the advantages of high precision, fast response and large driving force, but the stroke is small

Method used

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  • Two-degree-of-freedom flexible parallel mechanism for motion decoupling
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  • Two-degree-of-freedom flexible parallel mechanism for motion decoupling

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Embodiment Construction

[0021] The present invention will be further described in detail below in conjunction with the embodiments and the accompanying drawings, but the embodiments of the present invention are not limited thereto.

[0022] refer to Figure 1 to Figure 3 , a motion-decoupled two-degree-of-freedom compliant parallel mechanism, including a base 1, a moving platform 2, an X-axis branch chain 3 and a Y-axis branch chain 4, the base 1 and the moving platform 2 pass through the X The shaft branch chain 3 is connected to the Y-axis branch chain 4; the X-axis branch chain 3 and the Y-axis branch chain 4 are distributed orthogonally, and have the same structure, and both include a first parallel four-bar guide mechanism 5, a second parallel four Rod guiding mechanism 6 and displacement amplification mechanism 7. The first parallel four-bar guide mechanism 5 is connected to the base 1, the second parallel four-bar guide mechanism 6 is connected to the moving platform 2, and the displacement a...

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Abstract

The invention discloses a two-degree-of-freedom flexible parallel mechanism for motion decoupling. The two-degree-of-freedom flexible parallel mechanism comprises a base, a movable platform, an X-axis branch and a Y-axis branch. The base and the movable platform are connected through the X-axis branch and the Y-axis branch. The X-axis branch and the Y-axis branch are distributed in an orthogonal mode and are of the same structure. The X-axis branch and the Y-axis branch each comprise a first parallel four-rod guiding mechanism, a second parallel four-rod guiding mechanism and a displacement amplification mechanism; the first parallel four-rod guiding mechanism is connected with the base; the second parallel four-rod guiding mechanism is connected with the movable platform; and the displacement amplification mechanism is connected between the first parallel four-rod guiding mechanism and the second parallel four-rod guiding mechanism. According to the two-degree-of-freedom flexible parallel mechanism, the parallel structure is adopted, and the structure is compact; each branch comprises two parallel four-rod guiding mechanisms and one displacement amplification mechanism, the input displacement of a piezoelectric ceramic driver can be amplified, and a large operating stroke is achieved; and meanwhile coupling between X-axis movement and Y-axis movement is avoided.

Description

technical field [0001] The invention relates to the fields of precision positioning and precision operation, in particular to a two-degree-of-freedom compliant parallel mechanism with motion decoupling. Background technique [0002] Precision positioning platforms are widely used in some workplaces that require submicron or even nanometer positioning accuracy, such as ultra-precision machining, microelectronics engineering, bioengineering, nanotechnology and other fields, and are the core of precision positioning technology. [0003] The compliant mechanism is a new type of mechanism that realizes motion through the elastic deformation of the mechanism body, which can avoid problems such as hinge gaps and assembly errors in traditional rigid mechanisms, so that the motion accuracy of such mechanisms can reach submicron or even nanometer levels, so It is widely used as the body of the precision positioning platform, especially the compliant parallel mechanism. Usually, the p...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B25J9/00
CPCB25J9/003
Inventor 张宪民金莫辉
Owner SOUTH CHINA UNIV OF TECH
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