A four-degree-of-freedom parallel mechanism with a large-angle twistable moving platform and a composite branch

A rotating platform and large-angle technology, which is applied to manipulators, manufacturing tools, program-controlled manipulators, etc., can solve problems such as the limitation of the rotational freedom range, reduce the difficulty of manufacturing and processing, reduce the number of branch chains, and increase the working space.

Active Publication Date: 2022-08-05
CIVIL AVIATION UNIV OF CHINA
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  • Abstract
  • Description
  • Claims
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Problems solved by technology

[0003] Compared with the series structure, the main disadvantage of the parallel mechanism is that the working space of the parallel mechanism, especially the range of rotational freedom is limited

Method used

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  • A four-degree-of-freedom parallel mechanism with a large-angle twistable moving platform and a composite branch
  • A four-degree-of-freedom parallel mechanism with a large-angle twistable moving platform and a composite branch
  • A four-degree-of-freedom parallel mechanism with a large-angle twistable moving platform and a composite branch

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Embodiment Construction

[0023] The following describes in detail the four-degree-of-freedom parallel mechanism provided by the present invention with a large-angle twistable moving platform and a composite branch chain with reference to the accompanying drawings and specific embodiments.

[0024] like figure 1 — Image 6 As shown, the four-degree-of-freedom parallel mechanism with a large-angle twistable moving platform and a composite branch provided by the present invention includes a fixed platform 1, a moving platform 2, a first branch I, a second branch II and a third branch III ;

[0025] Wherein, the fixed platform 1 includes a bottom plate 101 and two second rotating supports 301 ; the two second rotating supports 301 are respectively fixed on the middle parts of both sides of the upper surface of the fixed platform 1 , and the central axis is perpendicular to the upper surface of the bottom plate 101 ;

[0026] The moving platform 2 includes a platen 201, two spherical hinge supports 601 ...

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Abstract

A four-degree-of-freedom parallel mechanism with a large-angle twistable moving platform and a composite branch chain. It includes a fixed platform, a moving platform, a first branch chain, a second branch chain and a third branch chain, and has two degrees of freedom in translation and rotation. Advantages of the present invention: First, the configuration mode of the composite branch chain of the lead screw and the electric push rod is adopted, while ensuring that the required degree of freedom of the mechanism is satisfied, the number of branch chains of the mechanism is reduced, and the distance between the branch chains is reduced. Interfere with each other and increase the working space of the organization. Secondly, the movable platform structure with hollow in the middle is adopted, and with the double rotating accessories on the movable platform, under the mutual movement of each branch chain, the movable platform can be twisted at a large angle of more than 180 degrees. Finally, there are two branched chains with the same structure and simple structure, which reduces the difficulty of manufacturing and processing and saves the manufacturing cost.

Description

technical field [0001] The invention belongs to the technical field of parallel mechanisms, in particular to a four-degree-of-freedom parallel mechanism with a large-angle twistable moving platform and a composite branch chain. Background technique [0002] The parallel mechanism is a multi-degree-of-freedom mechanism composed of multiple moving branches connected in parallel between the moving platform and the fixed platform. Parallel mechanisms have been widely used in CNC machining centers, motion simulators, haptic devices, micro-nano operators and other fields due to their advantages of high stiffness, strong bearing capacity, less error superposition, high motion accuracy and simple control. [0003] One of the main disadvantages of the parallel mechanism compared to the series structure is that the working space of the parallel mechanism, especially the range of rotational degrees of freedom, is limited. The composite branch chain is to arrange two or more drive moto...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B25J9/00
CPCB25J9/0072
Inventor 吴孟丽林玉飞李德祚李明宇王旭浩唐杰张军
Owner CIVIL AVIATION UNIV OF CHINA
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