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Precise high-rigidity flexible spherical hinge

A spherical hinge, high rigidity technology, applied in the direction of pivot connection, etc., can solve the problems of precision instability error, low rigidity, etc., and achieve the effect of high rotation accuracy, good workability and convenient installation.

Inactive Publication Date: 2013-09-25
CHANGCHUN INST OF OPTICS FINE MECHANICS & PHYSICS CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to propose a precision high-rigidity flexible spherical hinge, which solves the installation support stress caused by poor flexibility and the precision instability error caused by low stiffness in the prior art.

Method used

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  • Precise high-rigidity flexible spherical hinge
  • Precise high-rigidity flexible spherical hinge
  • Precise high-rigidity flexible spherical hinge

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0015] See attached figure 1 , the precision high-rigidity flexible spherical hinge of the present invention includes a ball shaft 1, a jacket 2, a ball hinge outer ring 3, a steel ball 4, a retainer 5, a rolling steel ball 6, a ball hinge locking outer ring 7 and a lock nut 8;

[0016] The rolling steel ball 6 is embedded on the retainer 5, and the retainer 5 cooperates with the ball shaft 1 through the rolling steel ball 6. The retainer 5 includes two hemispherical bowl structures, the upper and lower two Steel balls 4 are evenly arranged at the contact of the two hemispherical bowl structures, the retainer 5 is placed in the outer ring 3 of the ball joint, the outer ring 3 of the ball joint is placed in the outer casing 2, and the ball joint is locked The outer ring 7 is threadedly connected to the outer sleeve 2, and is in contact with the retainer 5 to apply torque to the inside. The ball shaft 1 passes through the ball hinge to lock the outer ring 7 and the supported mem...

Embodiment 2

[0020] See attached figure 2 , The difference between this embodiment and Embodiment 1 is that: the lower end of the ball shaft 1 also has a ball rod extending out, and the positioning is realized through the square head shape of the lower end.

Embodiment 3

[0022] The difference between the present embodiment and the first embodiment is that, considering more application ranges of the ball joint, the angle adjustment range between the direction of the ball axis and the installation surface of the ball joint is enlarged. The ball hinge locking outer ring 7 is designed as a tapered hole. The size and angle of the tapered hole can ensure that the ball shaft 1 can rotate 15° in any direction in the tapered hole relative to the mounting surface, and at the same time, the middle hole of the lock nut 8 is enlarged accordingly, so as to Non-interfering ball axis 1 rotation angle shall prevail; it is a large-angle spherical hinge, the adjustable adjustment foot is ±15°, and the flexible angle is ±0.5°, which is used to install a support structure with a large adjustment range and can adapt to various installation support structures.

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Abstract

The invention relates to a precise high-rigidity flexible spherical hinge, belonging to the technical field of precision machinery and aiming to overcome installation bearing stress due to the poor flexibility and a precision instability error due to the low rigidity. The precise high-rigidity flexible spherical hinge comprises a ball bearing, a jacket, a spherical hinge outer ring, steel balls, a holder, rolling steel balls, a spherical hinge locking outer ring and a locking unit, wherein the rolling steel balls are embedded into the holder; the holder is put in the spherical hinge outer ring; the spherical hinge outer ring is put in the jacket; the spherical hinge locking outer ring is in threaded connection with the jacket and is in matching contact with the holder to apply moment inwards; and a ball rod member of the ball bearing penetrates an through hole formed in the middle of the spherical hinge locking outer ring and is connected with a supported member, thereby realizing angle regulation. According to the precise high-rigidity flexible spherical hinge, the spherical hinge contacts the spherical hinge outer ring through the steel balls, so that the flexibility is excellent; and the ball bearing is matched with the spherical hinge outer ring and the rolling steel balls and is embedded into the holder to form a hinge main body of the spherical hinge, so that the spherical hinge has the bidirectional rigidity and the excellent flexibility is maintained when the support rigidity is high.

Description

technical field [0001] The invention belongs to the technical field of precision machinery, and in particular relates to a precise high-rigidity flexible spherical hinge used in high-rigidity flexible systems, optical system support, precision measurement and superfinishing. Background technique [0002] At present, the existing hinge structure lacks flexibility, and the flexible support and connection structure lacks rigidity. When supporting important part structures, due to the lack of flexibility, structural deformation and stress are caused, or because there are many ball joints in the contact position, in order to ensure comfortable rotation, Polymer materials such as plastics are used, so the flexibility is too large and the support rigidity is lacking, making it difficult to adjust many structures to the best design accuracy, thus affecting the accuracy and reliability of the entire system. Especially in the support of the optical system, it is particularly prominent...

Claims

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Application Information

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IPC IPC(8): F16C11/06
Inventor 李义
Owner CHANGCHUN INST OF OPTICS FINE MECHANICS & PHYSICS CHINESE ACAD OF SCI