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Few-acting point five-degree-of-freedom parallel mechanism including independent double-output composite universal joint

An independent action, universal joint technology, applied in the direction of metal processing machinery parts, large fixed members, metal processing equipment, etc., can solve the problems of few patents, immature theory, degree of freedom and parts waste, and achieve the optimization of structural parameters. Effect

Active Publication Date: 2016-07-27
HARBIN INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, since the six-degree-of-freedom parallel machine tool will not only cause waste of degrees of freedom and parts, but also increase the possibility of singularity, increase the difficulty of controlling the mechanism, and the coupling and interference between branches, only five degrees of freedom are needed in actual processing , so the five-degree-of-freedom parallel machine tool is an efficient mechanism for manufacturing
Although the research on five-degree-of-freedom parallel machine tools has gradually become a research hotspot, due to its immature theory, there are few related patents

Method used

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  • Few-acting point five-degree-of-freedom parallel mechanism including independent double-output composite universal joint
  • Few-acting point five-degree-of-freedom parallel mechanism including independent double-output composite universal joint
  • Few-acting point five-degree-of-freedom parallel mechanism including independent double-output composite universal joint

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specific Embodiment approach 1

[0026] Combine below figure 1 , 2 , 3, 4, 5, and 6 illustrate this implementation mode. The present invention relates to a five-degree-of-freedom parallel mechanism, more specifically, a five-degree-of-freedom parallel mechanism with few acting points containing independent double-output compound universal joints. This mechanism can Make the parallel machine tool drive the movement of four action points through five branch chains to accurately drive the moving platform, and ensure that the movement of the two branch chains at the common action point is independent of each other, and the axis of the branch chain passes through the action point at all times; independent double output composite universal joint Applied to multi-chain parallel machine tools, not only can the shape of the mechanism platform and the number of action points on it no longer be limited by the motion branch, but also help the parallel mechanism to optimize structural parameters and design special configu...

specific Embodiment approach 2

[0028] Combine below figure 1 , 2 , 3, 4, 5, and 6 describe this embodiment, and this embodiment will further describe Embodiment 1. The shape of the static platform 1 is a right-angled trapezoid. Static platform 1 is equipped with ball pair connection mechanism Ⅰ1-1, ball pair connection mechanism Ⅱ1-2, ball pair connection mechanism Ⅲ1-3, ball pair connection mechanism Ⅳ1-4 and ordinary universal joint mechanism Ⅰ1-5, ball pair connection Mechanism Ⅰ1-1 and ball pair connection mechanism II1-2 are respectively arranged at two vertices on the right-angled side of static platform 1, and ball pair connection mechanism Ⅲ1-3 and ball pair connection mechanism Ⅳ1-4 are respectively arranged at the corners of static platform 1. At the two vertices on the hypotenuse, the ordinary universal joint mechanism I1-5 is set on the static platform 1 at the center of a square with right-angled sides as sides, and the ordinary universal joint mechanism I1-5 makes the ball pair connection mec...

specific Embodiment approach 3

[0029] Combine below figure 1 , 2 , 3, 4, 5, and 6 illustrate this embodiment, and this embodiment will further illustrate Embodiment 1. The moving platform 2 is provided with ordinary universal joint mechanism II 2-1, ordinary universal joint mechanism III 2-2, independent For the dual-output composite universal joint mechanism 2-3 and the ordinary universal joint mechanism IV 2-4, the shape of the moving platform 2 is an isosceles triangle or an isosceles right triangle whose base and height are equal. When the shape of the moving platform 2 is an isosceles triangle whose base and height are equal, the ordinary universal joint mechanism II 2-1 is set at the apex of the isosceles triangle, and the ordinary universal joint mechanism III 2-2 is combined with the independent double output compound universal The knuckle mechanism 2-3 is respectively arranged at two intersections of the waist and the bottom edge, and the ordinary universal joint mechanism IV 2-4 is arranged at th...

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Abstract

The invention relates to a five-degree-of-freedom parallel mechanism, in particular to a few-acting point five-degree-of-freedom parallel mechanism including an independent double-output composite universal joint; and the mechanism can enable a parallel machine tool to realize driving of four acting points by five branched chains to move to accurately drive a mobile platform, so that motions of two branched chains sharing the same acting point are independent from each other, and meanwhile, axles of the branched chains constantly pass through the acting point. The independent double-output composite universal joint is applied to a multi-branched chain parallel machine tool, so that the shape of the mechanism platform and the number of the acting points thereon are not limited by the motion branched chains any more, and the parallel mechanism can be helped to optimize structural parameters and design special structures. One end of a middle branched chain is connected with a static platform, and the other end of the middle branched chain is connected with the mobile platform; one end of an independent acting point branched chain is connected with the static platform, and the other end of the independent acting point branched chain is connected with the mobile platform; and one end of a co-acting point branched chain is connected with the static platform, and the other end of the co-acting point branched chain is connected with the mobile platform.

Description

technical field [0001] The invention relates to a five-degree-of-freedom parallel mechanism, more specifically, a five-degree-of-freedom parallel mechanism with few acting points containing independent double-output compound universal joints. Background technique [0002] Parallel mechanism can realize high precision and complex surface processing in processing, so parallel machine tool is regarded as a revolutionary innovation in processing and manufacturing industry. In terms of structural design of parallel machine tools, due to the relatively sufficient research on the Stewart platform, patents related to six-degree-of-freedom parallel processing mechanisms have emerged. However, since the six-degree-of-freedom parallel machine tool will not only cause waste of degrees of freedom and parts, but also increase the possibility of singularities, increase the difficulty of controlling the mechanism, and the coupling and interference between branches, only five degrees of free...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B23Q1/64
CPCB23Q1/64
Inventor 柳强张旭堂
Owner HARBIN INST OF TECH