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Integrated two-dimensional rotation flexible hinge

A technology of flexible hinges and rotating shafts, which is applied in the directions of instruments, installations, optics, etc., can solve the problems of motion accuracy requirements that cannot be used to control the bandwidth, the existence of starting friction torque, and low motion resolution, and achieve compact structure and no starting torque. , the effect of high motion resolution

Pending Publication Date: 2017-09-01
SHANGHAI INST OF TECHNICAL PHYSICS - CHINESE ACAD OF SCI
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  • Abstract
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  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Two-dimensional rotation can be realized by using this kind of bearing, but there is a starting friction torque, which leads to low motion resolution and cannot be used in occasions with high control bandwidth and high motion precision requirements
In addition, this kind of hinge also has problems such as wear and tear, which limits its application.

Method used

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  • Integrated two-dimensional rotation flexible hinge
  • Integrated two-dimensional rotation flexible hinge
  • Integrated two-dimensional rotation flexible hinge

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Embodiment Construction

[0038] It will be described in detail below in conjunction with the accompanying drawings in order to better illustrate the structural features and functional features of the present invention, rather than limiting the protection scope of the present invention.

[0039] See attached figure 1 , the two-dimensional rotating flexible hinge of the present invention is composed of one part. Made using selective laser melting technology in 3D printing technology, the material is titanium alloy TC4. Tensile strength σ after processing b Between 1040MPa and 1100MPa, the yield strength σ 0.2 It is between 870MPa and 1030MPa, and the elastic modulus of the material is E=113GPa.

[0040] The torsional stiffness in the rotational dimension of the part can be estimated using the following formula:

[0041]

[0042]

[0043] The coefficient 2 means that two reed flexures arranged coaxially have the same cross reed parameters, E represents the elastic modulus of the material, D re...

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Abstract

The present invention discloses an integrated two-dimensional rotation flexible hinge, which comprises four symmetrically arranged reed flexible joints. Each flexible joint is formed is of a double-layer structure composed of an upper layer and a lower layer, wherein crossed reeds are connected. The double-layer structure is respectively provided with an interface surface, an inner ring connection interface, and an outer ring connection interface. Based on a connecting structure, four flexible joints are connected in the up-and-down staggered mode. During movement, upper and lower interface surfaces are respectively fixed on components required during the two-dimensional rotation process. The relative rotation is provided by the elastic deformation of crossed reeds. According to the invention, the integrated two-dimensional rotation flexible hinge is high in structural rigidity, and improves the surface shape horizontality of a reflector when being used as a reflector support. During movement, no friction is generated and no starting torque is required. The integrated two-dimensional rotation flexible hinge is free of lubrication, long in service life, high in precision, good in repeatability, stable in operation, compact in structure is, thus being particularly suitable for weight and volume-limited occasions. The integrated two-dimensional rotation flexible hinge is provided with a safety limiting structure, so that the efficiency loss of reeds due to over-stroke can be avoided.

Description

[0001] Technical field: [0002] The invention relates to the technical field of development of astronomical observation instruments, in particular to a two-dimensional rotating flexible hinge used for fast swing mirror support. [0003] Background technique: [0004] In the practical application of astronomical observation instruments, because astronomical observation requires long-term integration, astronomical observation instruments maintain a stable boresight for a long time, while ground-based or space astronomical telescopes will be disturbed by internal and external vibrations of the instrument, resulting in structural vibrations If the jitter of the visual axis is caused, it is necessary to use a fast swing mirror to compensate the jitter of the visual axis in real time. During the movement of the fast swing mirror, there is a two-dimensional deflection between the mirror surface and the driver, and a two-dimensional rotating hinge needs to be installed between the dri...

Claims

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Application Information

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IPC IPC(8): G02B7/182
CPCG02B7/182
Inventor 陈洪达尹达一张永贺魏传新李夏雨
Owner SHANGHAI INST OF TECHNICAL PHYSICS - CHINESE ACAD OF SCI
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