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Moving-decoupling space three-freedom connection-in-parallel mechanism

A degree of freedom and parallel technology, applied in the direction of supporting machines, mechanical equipment, machine tables/supports, etc., can solve the problems of increased difficulty in calibration, limited flexibility and insufficient rotation capacity of the motion platform, etc.

Active Publication Date: 2007-08-29
JIANGSU CHANGHONG INTELLIGENT EQUIP CO LTD
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  • Abstract
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  • Application Information

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Problems solved by technology

[0004] However, these spatial parallel mechanisms also have their shortcomings
In general, space parallel mechanisms often have a common disadvantage due to kinematic coupling problems, that is, the flexibility (or rotation capacity) of the motion platform is limited.
And flexibility plays a decisive role in industrial applications; due to limited flexibility, it is difficult for many parallel mechanisms to be further widely used in industry
In addition, kinematic coupling also adds difficulty to the calibration of the mechanism

Method used

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Embodiment Construction

[0018] The first embodiment of the three-degree-of-freedom parallel mechanism of the present invention is shown in FIG. 1 . The mechanism includes a triangular moving platform 16 , a fixed platform 10 , and three branches connecting the moving platform 16 and the fixed platform 10 . The fixed platform 10 is a generalized platform, including three inclined guide rails 11 fixed on the platform 10 . Among the three branches, two branches are the same, and the longitudinal symmetry axes of these two branches are located in the same plane, and both include: input slider 12, truss member 14, and kinematic pair; the kinematic There are three pairs, one is the moving pair a connected between the input slider 12 and the inclined guide rail 11, the other is the rotating pair 13 connected between the input slider 12 and the truss bar 14, and the other is connected to the moving pair a. Universal or ball joint 15 between platform 16 and truss member 14 . Another branch comprises: input s...

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Abstract

The invention relates to a motion decoupled spatial three-freedom parallel mechanism, belonging to the mechanical structure technical field, comprising: a dynamic platform, a static platform, and three branches connected with the dynamic and static platforms, where two branches are the same and their vertical axes are located in the same plane, and the three branches all contain an input piece, a connecting piece and three motion auxiliaries, where one motion auxiliary is a single-freedom motion auxiliary a connected between the input piece and the static platform, one is a single-freedom motion auxiliary b connected between the input piece and the connecting piece, and another one is a motion auxiliary c connected between the dynamic platform and the connecting piece, where the motion auxiliary a is driven, the motion auxiliary c can be single-freedom and multi-freedom. And the invention has features of higher rotating capacity, i.e. higher flexibility, and motion and remotion decoupling.

Description

technical field [0001] The invention belongs to the technical field of mechanical structures, and in particular relates to several parallel mechanisms with three degrees of freedom in space. The mechanism has two degrees of freedom for movement and one degree of freedom for rotation, and the movement and rotation are decoupled. Background technique [0002] In the past two decades, due to the advantages of high rigidity, high precision, high bearing capacity, good dynamic performance, and compact structure, parallel mechanisms have been more and more widely used in the industry, especially in machine tools, micro-motion Applications in industries such as consoles, force and torque sensors, and flight simulators. Therefore, more and more scholars begin to pay attention to the research of parallel mechanism. [0003] Current parallel mechanisms have 2, 3, 4, 5 and 6 degrees of freedom. The 6-DOF parallel mechanism plays a very important role in this family, because a free ri...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F16M11/00
Inventor 刘辛军汪劲松吴超张辉段广洪
Owner JIANGSU CHANGHONG INTELLIGENT EQUIP CO LTD
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